The present invention relates to a preparation for administration through mucosa, containing a medicine of high molecular weight as an active ingredient. More particularly, the invention relates to a preparation in powder form for administration through mucosa, comprising a medicine of high molecular weight and a cationic polymer. In particular, the invention relates to a preparation in a powder form for administration through nasal mucosa.

Currently, high molecular weight medicines are administered to patients by intravenous or subcutaneous injection. However, since the administration by injection is difficult to be performed by patients themselves and is accompanied with pain, administration through mucosa is desired as a simpler method than injection. Specific examples of administration through mucosa include administration through nasal mucosa, ocular mucosa, oral mucosa, pulmonary mucosa or vaginal mucosa; or through the mucosa of digestive tract such as gastric mucosa, small intestinal mucosa, large intestinal mucosa or rectal mucosa. Among all, administration through nasal mucosa is attracting attention as a relatively simple administration method by which rapid absorption of medicines and positive effect can be achieved. However, the absorbability depends on the molecular weight of the medicine used. Although medicines with a molecular weight of 1,000 or less are absorbed relatively effectively, effective absorption of those medicines of larger molecular weights is difficult to achieve without some contrivance (C. McMartin et al., J. Pharm. Sci., 76 (7):535-540 (1987)). Thus, it has been difficult to achieve therapeutic effect by administration of high molecular weight medicines through nasal mucosa.

Document WO 90 09780 A1 discloses a powder for administration of insulin or calcitonin to the mucosa.

Means to improve the low absorbability of high molecular weight medicines include, methods in which a surfactant or a salt of bile acid is jointly used as an absorption promoting agent (S. Hirai et al., Int. J. Pharm., 9:173-184 (1981); Y. Maitani et al., Drug Design and Delivery, 1:65-70 (1986)); and methods in which cyclodextrin is jointly used as an absorption promoting agent (N.G.M. Schipper et al., J. Control Release, 21 (1):173-185 (1992); T. Irie et al., J. Inter. Pharm., 84:129-139 (1992)). However, it is apprehended that these absorption promoting agents may be harmful to nasal mucosa. Also known are methods in which a high molecular weight substance such as albumin, dextran or sodium hyaluronate is jointly used as an absorption promoting agent (T. Igawa et al., Chem. Pharm. Bull. 36(8):3055-3059 (1988); Japanese Unexamined Patent Publication No. 6-65090; Japanese Unexamined Patent Publication No. 8-198772). However, these methods still cannot achieve sufficient absorption promoting effect and have difficulty in industrial production of such compositions. Thus, none of the above-mentioned methods has been put to practical use.

Japanese Unexamined Patent Publication No. 1.0-95738 discloses a preparation using fluorescein thiocyanate dextran (hereinafter referred to as "FITC-dextran"; molecular weight: 4,400) as a model drug (substance) of low absorbability. This preparation was obtained by adding FITC-dextran to physiological saline in which arginine, poly-arginine or a salt of poly-arginine was dissolved. When this preparation was administered to the nasal cavity mucosa of Wistar rats, higher FITC-dextran levels in blood were retained.

Japanese Unexamined Patent Publication No. 4-503508 discloses the administration into rat's nostrils of a preparation obtained by adding DEAE-dextran or chitosan to an insulin solution.

Although various methods as described above have been developed, a more effective and practical method is still required as a means to improve the low absorbability of high molecular weight medicines.

Under such circumstances, it is an object of the present invention to provide a preparation for administration through mucosa, in particular through nasal mucosa, which enables safe and effective absorption of a high molecular weight medicine through mucosa. It is another object of the invention to provide a pharmaceutical composition in powder form which enables safe and effective absorption of a high molecular weight medicine by living bodies.

As a result of intensive and extensive researches toward the development of those preparations which enable safe and effective absorption of a high molecular weight medicine through mucosa, the present inventors have found 1) that a copolymer of aminoalkylmethacrylate or polyvinyl acetal diethylaminoacetate promotes the absorption of a high molecular weight medicine through mucosa by expanding tight junctions of mucosal tissues; and 2) that combined use of one of said cationic polymers with a viscous polymer further enhances the absorption since the viscous polymer extends the residence time of the relevant preparation in mucosa. Thus, the present invention has been achieved. The present inventors have found that a copolymer of aminoalkylmethacrylate or polyvinyl acetal diethylaminoacetate is superior to poly-L-arginine (which is also a cationic polymer) in absorption promoting effect.

The present invention provides a preparation in powder form for administration through mucosa, in particular for pernasal administration, comprising a medicine of high molecular weight and as a cationic polymer, a copolymer of aminoalkylmethacrylate or polyvinylacetal diethylaminoacetate. It is preferred that the powder form preparation of the invention for administration through mucosa further comprise a viscous polymer. As a viscous polymer, hydroxypropylmethyl cellulose may be mentioned. A medicine of high molecular weight is selected from the group consisting of bioactive peptides and proteins, antibodies, vaccines, and antigens. The preparation of the invention is especially effective for the administration of granulocyte colony-stimulating factor, insulin, erythropoietin, growth hormone or influenza antigens through mucosa, in particular through nasal mucosa.

The present invention also provides a pharmaceutical composition in powder form, comprising a medicine of high molecular weight as mentioned above and a cationic polymer as mentioned above.

Hereinbelow, the present invention will be described in detail.

In one embodiment of the invention, the powder form preparation of the invention for administration through mucosa is obtained by adding to a medicine of high molecular weight, as mentioned above, an excipient (e.g. saccharides) and one of the cationic polymer, as mentioned above, and optionally a viscous polymer and, if necessary, appropriate additives and then freeze-drying or spray-drying the resultant mixture.

"A medicine of high molecular weight" used in the invention refers to a bioactive peptide or protein; antibody, vaccine, antigen or the like. Specific examples include the following substances, which are not intended to limit the present invention: calcitonin, insulin, proinsulin, vasopressin, desmopressin, luteinizing hormone, luteinizing hormone-releasing hormone, somatostatin, prolactin, glucagon, gastrin, secretin, kallikrein, urokinase, neurotensin, enkephalin, kyotorphin, endorphin, endothelin, angiotensin, transferrin, atrial natriuretic polypeptide, epithelial cell growth factor, growth hormone, parathyroid hormone, interferons, interleukins, tumor necrosis factor, leukemia inhibitory factor, hematopoietic stem cell growth factor, erythropoietin, granulocyte colony-stimulating factor (G-CSF), granulocyte macrophage-stimulating factor, macrophage colony-stimulating factor, thrombopoietin, superoxide dismutase, tissue plasminogen activator, antithrombin, blood coagulation factors, anti-IgE antibodies, anti-IgA antibodies, anti-tumor antibodies, antibodies to tumor necrosis factor, anti-interleukin antibodies, HIV-neutralizing antibodies, anti-platelet antibodies, anti-hepatitis virus antibodies, hepatitis vaccines, influenza vaccines (influenza antigens), pertussis vaccine, diphtheria vaccine, tetanus toxoids vaccine, peptides or proteins such as pollen from Japanese cedar or ragweed which may act as antigen, such peptides or proteins conjugated to haptens, and mixtures of such peptides, proteins or conjugates with adjuvants. It is easily presumed that the present invention will also improve the absorbability through mucosa, in particular through nasal mucosa, of medicines which have smaller molecular weights than the above enumerated high molecular weight medicines. Thus, it is believed that the application of the present invention to them will be also useful.

Examples of G-CSF which is one of the high molecular weight medicines that can be used in the present invention include a polypeptide with human G-CSF activity represented by the amino acid sequence of SEQ ID NO: 1, 2 or 3; and a glycoprotein composed of the above polypeptide and sugar chains added thereto. Further, G-CSF derivatives with G-CSF activity represented by the above-mentioned amino acid sequence which is partially modified (i.e. has substitution, deletion, insertion and/or addition) are also included in the G-CSF of the invention.

These G-CSFs may be extracted/separated/purified from natural products, or they may be produced by transformants obtained by recombinant techniques and then isolated/purified. Examples of host cells for such transformation include E. coli and mammal cells (e.g. C127, CHO cells). Detailed methods for producing these G-CSFs are disclosed, for example, in Japanese Unexamined Patent Publication/PCT No. 63-500636 and Japanese Unexamined Patent Publication Nos. 62-236497, 62-236488 and 63-267292.

The content of a medicine of high molecular weight in the powder form preparation of the invention is usually 0.01 to 90% (w/w), preferably 0.1 to 50% (w/w).

"The cationic polymer" used in the invention refers to a copolymer of aminoalkylmethacrylate or polyvinyl acetal diethylaminoacetate A copolymer of aminoalkylmethacrylate is available from, for example, Rohm Pharma under the trade name Eudragit E or Eudragit RS. Eudragit E is a copolymer of methyl methacrylate, butyl methacrylate and dimethylaminoethyl methacrylate with an average molecular weight of 150,000. Polyvinyl acetal diethylaminoacetate is available from, for example, Sankyo Co., Ltd. under the trade name AEA. This is a polymer with an average molecular weight of 65,000 which is obtained by dehydrating polyvinyl alcohol and acetaldehyde to generate acetal and hydroxyl, and then attaching diethyl aminoacetate to a part of the acetal and hydroxyl by ester linkage. Poly-L-arginine used for comparative purposes, is a polymer of L-arginine. Its average molecular weight is 1000 to 1,000,000. Preferably, this polymer has an average molecular weight of 12,100 to 92,000, more preferably 92,000. Poly-L-arginine is available from Sigma. The content of said cationic polymers in the powder form preparation of the invention for administration through mucosa is usually 0.1 to 90% (w/w), preferably 1 to 50% (w/w).

"A viscous polymer" used in the invention refers to a polymer which becomes viscous when dissolved or swollen. The viscous polymer used in the invention may be any viscous polymer as long as it increases the absorption of a medicine of high molecular weight when used in combination with a cationic polymer, as compared to the case when the cationic polymer is used alone. Specific examples of such viscous polymers include hydroxypropylmethyl cellulose, hydroxypropyl cellulose, carboxyvinyl polymer, agar powder and gum arabic powder. The content of a viscous polymer in the powder form preparation of the invention for administration through mucosa is usually 0.1 to 90% (w/w), preferably 1 to 50% (w/w).

An excipient used in the invention is, typically, a saccharide.
Specific examples of saccharides include xylitol, fructose, sorbitol, lactose, inositol, sucrose and mannitol. Other examples of excipients include starches, inorganic substances, organic acids and amino acids. As starches, corn starch, wheat starch, potato starch and the like may be enumerated. As inorganic substances, calcium phosphate, calcium hydrogenphosphate, disodium hydrogenphosphate, sodium dihydrogenphosphate, magnesium carbonate, sodium chloride, calcium sulfate and the like may be enumerated. As organic substances, succinic acid, tartaric acid, citric acid, fumaric acid, malic acid, gluconic acid, glucuronic acid, salts thereof, and the like may be enumerated. As amino acids, L-arginine, D,L-methionine, L-phenylalanine, L-glutamic acid and the like may be enumerated. The content of the excipient in the powder form preparation of the invention for administration through mucosa is usually 1 to 90% (w/w), preferably 5 to 80% (w/w).

If necessary, additives such as a lubricant may be used in the present invention. Specific examples of lubricants include magnesium stearate, stearic acid and talc. The content of the additives in the powder form preparation of the invention for administration through mucosa is usually 0.01 to 90% (w/w), preferably 0.05 to 50% (w/w).

Hereinbelow, a exemplary method for producing the powder form preparation of the invention for administration through mucosa will be described briefly.

A buffer solution containing G-CSF is mixed with a buffer solution in which a cationic polymer, an excipient such as sucrose or mannitol and, optionally, a viscous polymer have been dissolved in advance. The resultant mixture is spray-dried to obtain a powder.

Necessary amounts of the resultant powder are weighed out and packed in capsules to obtain a preparation in powder form for administration through mucosa.

The thus prepared powder of the preparation for administration through mucosa is usually 0.1 to 500 µm, preferably 5 to 100 µm in particle size.

The powder of the preparation for administration through mucosa is easy to handle when it is packed in capsules. As a material for the capsule base, gelatin, hydroxypropylmethyl cellulose, methyl cellulose, starch or the like may be used. Glycerol, sorbitol, carrageenan, polyethylene glycol, gum arabic or the like may be added to the above material to increase plasticity.

Additionally, potassium chloride, sucrose, a coloring agent and titanium oxide may also be added.

The preparation of the invention in powder form for administration through mucosa may be applied to the mucous membrane of patients at the time of need or at an appropriate frequency. Specific examples of mucosa include nasal mucosa, ocular mucosa, oral mucosa, pulmonary mucosa, vaginal mucosa and mucous membranes of digestive tract such as gastric mucosa, small intestinal mucosa, large intestinal mucosa and rectal mucosa. For example, when the preparation of the invention is administered through nasal mucosa, a capsule containing the powder form preparation is set in a small-sized sprayer (Publizer™). After a hole is made in the capsule, the nozzle of the sprayer is inserted into one of the nostrils of the patient. While he is breathing in through the nose, the patient presses the rubber ball of the sprayer to thereby spray the powder form preparation into the nasal cavity. A preparation of the invention containing granulocyte colony-stimulating factor as an active ingredient may be administered to patients 1 to 4 times a day such that the dose of the active ingredient is 1-500 µ g/kg/day, preferably 5-100 µg/kg/day. A preparation of the invention containing insulin as an active ingredient may be administered to patients 1 to 4 times a day such that the dose of the active ingredient is 0.1-100 U/kg/day, preferably 0.5-20 U/kg/day. A preparation of the invention containing erythropoietin as an active ingredient may be administered to patients 1 to 4 times a day such that the dose of the active ingredient is 50-50,000 IU/kg/day, preferably 200-8,000 IU/kg/day. A preparation of the invention containing growth hormone as an active ingredient may be administered to patients 1 to 4 times a day such that the dose of the active ingredient is 0.1-50 IU/kg/day, preferably 0.4-15 IU/kg/day. A preparation of the invention containing an influenza antigen as an active ingredient may be administered to persons in need of such a preparation 1 to 4 times a day with an interval of 2-6 weeks such that the dose of the active ingredient is 0.5-200 CCA/kg/day, preferably 20-40 CCA/kg/day.

Hereinbelow, the present invention will be described specifically with reference to the following Examples.

The cationic polymers, sucrose, D-mannitol, hydroxypropylmethyl cellulose, sodium hyaluronate and components of buffer solutions dissolving them (buffer components) used in the following Examples and Comparative Examples are as described below.

• Poly-L-arginine (Sigma)
• Aminoalkylmethacrylate copolymer E (Rohm Pharma; Trade Name: Eud ragit E100)
• Polyvinyl acetal diethylaminoacetate (Sankyo Co., Ltd.; Trade Na me: AEA)
• Diethylaminoethyl (DEAE)-dextran (Fluka)
• Chitosan (Chitosan 8B; manufactured by Katokichi Co., Ltd. and s old by Funakoshi)
• Sucrose (Kosakai Pharmaceutical; saccharose prepared according to the Japanese Pharmacopoeia)
• D-mannitol (Kao Corp.; Trade Name: Nikkyoku Mannitol Kao).
• Hydroxypropylmethyl cellulose (Shin-Etsu Chemical; Trade Name: Metholo se 60SH4000)
• Sodium hyaluronate (Tokyo Kasei Organic Chemicals) Buffer components
• Citric acid (Oriental Pharmaceutical & Synthetic Chemical)
• Phosphoric acid (Kokusan Kagaku)

The medicines of high molecular weight used in the following Examples are as described below.

The granulocyte colony-stimulating factor (G-CSF) used is a polypeptide having the amino acid sequence shown in SEQ ID NO: 1, produced by a transformed E. coli (see Japanese Unexamined Patent Publication/PCT No. 63-500636). The thus obtained G-CSF was concentrated, followed by buffer replacement to prepare a buffer solution ontaining G-CSF.

The insulin used is a commercial product (Boehringer Mannheim; recombinant human insulin; Mw = ca. 5700).

The erythropoietin used is a commercial product (Kirin Brewery; recombinant human erythropoietin; Mw = ca. 30,000).

The growth hormone used is a commercial product (Chemicon; recombinant human growth hormone; Mw = ca. 22, 000).

The influenza A antigen used is a commercial product (Chemicon).

To a buffer solution containing G-CSF, a buffer solution containing sucrose and poly-L-arginine was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 20% (w/w) Poly-L-arginine 20% (w/w) Sucrose 26% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing G-CSF, a buffer solution containing sucrose and polyvinyl acetal diethylaminoacetate (AEA) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having he following formula. G.CSF 20% (w/w) AEA 20% (w/w) Sucrose 26% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing G-CSF, a buffer solution containing sucrose and aminoalkylmethacrylate copolymer E (Eudragit E100) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 20% (w/w) Eudragit E100 20% (w/w) Sucrose 26% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing G-CSF, a buffer solution containing sucrose and aminoalkylmethacrylate copolymer E (Eudragit E100) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 20% (w/w) Eudragit E100 10% (w/w) Sucrose 63% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing G-CSF, a buffer solution containing sucrose and aminoalkylmethacrylate copolymer E (Eudragit E100) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 20% (w/w) Eudragit E100 20% (w/w) Sucrose 53% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing G-CSF, a buffer solution containing sucrose and aminoalkylmethacrylate copolymer E (Eudragit E100) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 20% (w/w) Eudragit E100 30% (w/w) Sucrose 43% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing G-CSF, a buffer solution containing sucrose and aminoalkylmethacrylate copolymer E (Eudragit E100) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 20% (w/w) Eudragit E100 57% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing G-CSF, a buffer solution containing sucrose and aminoalkylmethacrylate copolymer E (Eudragit E100) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 20% (w/w) Eudragit E100 20% (w/w) Sucrose 47% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing G.CSF, a buffer solution containing sucrose, aminoalkylmethacrylate copolymer E (Eudragit E100) and hydroxypropylmethyl cellulose (HPMC) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 20% (w/w) Eudragit E100 20% (w/w) HPMC 10% (w/w) Sucrose 37% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing G-CSF, a buffer solution containing sucrose, aminoalkylmethacrylate copolymer E (Eudragit E100) and hydroxypropylmethyl cellulose (HPMC) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 20% (w/w) Eudragit E100 20% (w/w) HPMC 20% (w/w) Sucrose 27% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing G-CSF, a buffer solution containing sucrose was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 20% (w/w) Sucrose 46% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing G-CSF, a buffer solution containing sucrose and sodium hyaluronate was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 20% (w/w) Sodium hyaluronate 20% (w/w) Sucrose 26% (w/w) Buffer components appropriate amounts Total 100% (w/w)

Male beagles were used in this experiment. The preparations from Comparative Example 1 and 2 were separately packed in gelatin capsules such that each capsule would give the dog 100 µg of G-CSF per kg of body weight. The gelatin capsule was mounted in Publizer™ (Ishikawa seisakusho) having a silicone tube about 2.5 cm in length bonded to its tip. Then, the silicone tube portion was inserted into the nasal cavity of the dog through one of its nostrils, followed by pressing the rubber ball portion of the Publizer™ to administer the preparation. After the administration, blood samples were taken from the forearm vein at regular intervals. Blood G-CSF levels were determined by ELISA (T. Ichikawa et al., Experimental Hematology 23: 192-195 (1955)). Table 1 shows the value of area under the blood G-CSF level vs time curve (AUC_G) for each preparation. The preparation of Comparative Example 1 containing poly-L-arginine as a cation polymer exhibited a higher AUC_G value than the preparation of Comparative Example 2 containing no high molecular weight substances. Thus, it was found that the addition of poly-L-arginine promotes the absorption of G-CSF through nasal mucosa. Preparation administered Comparative Ex. 2 Comparative Example 1 AUC_G 0 → 32 hr
(· hr · ml^-1) 5.3 10.3

Male beagles were used in this experiment. The preparations from Comparative Examples 2 and 3 were separately packed in gelatin capsules such that each capsule would give the dog 100 µg of G-CSF per kg of body weight. The gelatin capsule was mounted in Publizer™ (Ishikawa Seisakusho) having a silicone tube about 2.5 cm in length bonded to its tip. Then, the silicone tube portion was inserted into the nasal cavity of each dog through one of the nostrils, followed by pressing the rubber ball portion of the Publizer™ to administer the preparation. After the administration, blood samples were taken from the forearm vein at regular intervals. Blood G-CSF levels were determined by ELISA. Table 2 shows the value of area under the blood G-CSF level vs time curve (AUC_G) for each preparation. The preparation of Comparative Example 3 containing sodium hyaluronate (a non-cationic polymer) exhibited substantially the same AUC_G value as the preparation of Comparative Example 2 containing no high molecular weight substances. Thus, the addition of sodium hyaluronate showed little promotive effect on G-CSF absorption. Preparation administered Comparative Ex. 2 Comparative Ex. 3 AUC_G 0 → 32 hr
(ng · hr · ml^-1) 4.8 4.6

Male beagles were used in this experiment. The preparations from Examples 1, 2 and Comparative Example 1 were separately packed in gelatin capsules such that each capsule would give the dog 100 µg of G-CSF per kg of body weight. The gelatin capsule was mounted in Publizer™ (Ishikawa Seisakusho) having a silicone tube about 5.0 cm in length bonded to its tip. Then, the silicone tube portion was inserted into the nasal cavity of each dog through one of the nostrils, followed by pressing the rubber ball portion of the Publizer™ to administer the preparation. After the administration, blood samples were taken from the forearm vein at regular intervals. Leukocyte counts in blood samples were determined with a micro-cell counter. Blood G-CSF levels were determined by ELISA. Table 3 shows the values of area under the increased leukocyte count vs time curve (AUC_w) and of area under the blood G-CSF level vs time curve (AUC_G) for the preparations tested. As a result, it was found that AEA and Eudragit E100 have a better absorption-promoting effect than poly-L-arginine. Procuration administered Comparative Example 1 Example 1 Example 2 AUC_w 0 → 72 hr (count ·hr · ml^-1) 3083 5095 5707 AUG_G 0 → 31 hr (ng· hr · ml^-1) 13 .4 73.0 44.4

Male beagles were used in this experiment. The preparations from Examples 3, 4, 5 and 6 were separately packed in gelatin capsules such that each capsule would give the dog 100 µg of G-CSF per kg of body weight. The gelatin capsule was mounted in Publizer™ (Ishikawa Seisakusho) having a silicone tube about 5.0 cm in length bonded to its tip.. Then, the silicone tube portion was inserted into the nasal cavity of each dog through one of the nostrils, followed by pressing the rubber ball portion of the Publizer™ to administer the preparation. After the administration, blood samples were taken from the forearm vein at regular intervals. Leukocyte counts in blood samples were determined with a micro-cell counter. Blood G-CSP levels were determined by ELISA. Table 4 shows the values of area under the increased leukocyte count vs time curve (AUC_W) and of area under the blood G-CSF level vs time curve (AUC_G) for the preparations tested. The effect of Eudragit E100 was retained in spite of various changes in its content. Preparation Administered Example 3 Example 4 Example 5 Example 6 AUC_W 0 →72 hr
(count · hr · ml^-1) 3475 4053 4138 4562 AUC_G 0 →31 hr
(nq · hr · ml^-1) 25.6 27.1 16.8 11.1

Male beagles were used in this experiment. The preparations from Examples 7, 8 and 9 were separately packed in gelatin capsules such that each capsule would give the dog 100 µg of G-CSF per kg of body weight. The gelatine capsule was mounted in Publizer™ (Ishikawa Seisakusho) having a silicone tube about 5.0 cm in length bonded to its tip. Then, the silicone tube portion was inserted into the nasal cavity of each dog through one of the nostrils, followed by pressing the rubber ball portion of the Publizer™ to administer the preparation. After the administration, blood samples were taken from the forearm vein at regular intervals. Leukocyte counts in blood samples were determined with a micro-cell counter. Blood G-CSF levels were determined by ELISA. Table 4 shows the values of area under the increased leukocyte count vs time curve (AUC_W) and of area under the blood G-CSF level vs time curve (AUC_G) for the preparations tested. As a result, it became evident that the addition of HPMC together with Eudragit E100 enhances the absorption promoting effect as compared to the addition of Eudragit alone. Preparation administered Example 7 Example 8 Example 9 AUC_W 0 →72 hr
(count ·hr · ml^-1) 3988 5482 5618 AUC_G 0 →31 hr
(ng · hr · ml^-1) 19.9 54.5 76.7

To a buffer solution containing G-CSF, a buffer solution containing D-mannitol and aminoalkylmethacrylate copolymer E (Eudragit E100) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 10.0% (w/w) Eudragit E100 7.5% (w/w) D-mannitol 75.0% (w/w) Buffer components appropriate amounts Total 100 % (w/w)

To a buffer solution containing G-CSF, a buffer solution containing D-mannitol was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 10.0% (w/w) D-mannitol 81.8% (w/w) Buffer components appropriate amounts Total 100 % (w/w)

Male beagles were used in this experiment. The preparations from Example 10 and Comparative Example 4 were separately packed in gelatin capsules such that each capsule would give the dog 50 µg of G-CSF per kg of body weight. The gelatin capsule was mounted in Publizer™ (Ishikawa Seisakusho) having a silicone tube about 5.0 cm in length bonded to its tip. Then, the silicone tube portion was inserted into the nasal cavity of each dog through one of the nostrils, followed by pressing the rubber ball portion of the Publizer™ to administer the preparation. After the administration, blood samples were taken from the forearm vein at regular intervals. Blood G-CSF levels were determined by ELISA. Table 6 shows the values of area under the blood G-CSF level us time curve (AUC_G) for the preparations tested. As a result, it was found that Eudragit E100 remarkably promotes the adsorption of G-CSF through nasal mucosa. Preparation administered Example 10 Comparative Ex. 4 AUC_G 0 →31 hr (ng· hr · ml^-1) 67.1 16.4

To a buffer solution containing insulin, a buffer solution containing sucrose, aminoalkylmethacrylate copolymer E (Eudragit E100) and hydroxypropylmethyl cellulose (HPMC) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. Insulin 18% (w/w) Eudragit E100 27% (w/w) HPMC 9% (w/w) Sucrose 32% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing insulin, a buffer solution containing sucrose, poly-L-arginine and hydroxypropylmethyl cellulose (HPMC) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. Insulin 18% (w/w) Poly-L-arginine 27% (w/w) HPMC 9% (w/w) Sucrose 32% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing insulin, a buffer solution containing sucrose, diethylaminoethyl (DEAE)-dextran and hydroxypropylmethyl cellulose (HPMC) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. Insulin 18% (w/w) DEAE-dextran 27% (w/w) HPMC 9% (w/w) Sucrose 32% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing insulin, a buffer solution containing sucrose, chitosan and hydroxypropylmethyl cellulose (HPMC) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. Insulin 18% (w/w) Chitosan 27% (w/w) HPMC 9% (w/w) Sucrose 32% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing insulin, a buffer solution containing sucrose and hydroxypropylmethyl cellulose (HPMC) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. Insulin 18% (w/w) HPMC 9% (w/w) Sucrose 60% (w/w) Buffer components appropriate amounts Total 100% (w/w)

The insulin (as described above) was dissolved in a buffer solution to prepare a liquid preparation for subcutaneous administration having the following concentration. Insulin 1.0 mg/ml

The preparations from Example 11 and Comparative Examples 5 to 8 were administered to male beagles through the nose; and the preparation from Comparative Example 9 was administered to male beagles subcutaneously. For the pernasal administration group, individual preparations were packed in gelatin capsules such that each capsule would give the dog 70 µg of insulin per kg of body weight. The gelatine capsule was mounted in Publizer™ (Ishikawa Seisakusho) having a silicone tube about 5.0 cm in length bonded to its tip. Then, the silicone tube portion was inserted into the nasal cavity of each dog through one of the nostrils, followed by pressing the rubber ball portion of the Publizer™ to administer the preparation. In the subcutaneous administration group, the preparation from Comparative Example 9 was administered subcutaneously to the back of each dog such that 25 µg of insulin was administered per kg of body weight. After the administration, blood samples were taken from the forearm vein at regular intervals. Blood insulin levels were determined by ELISA. Table 7 shows the value of area under the blood insulin level vs time curve (AUC) for each preparation. As a result, it was found that Eudragit E100 remarkably promotes the pernasal absorption of insulin. Further, its absorption promoting effect was superior to the effect of poly-L-arginine, DEAE-dextran and chitosan. The bioavailability of the insulin in the preparation of Example 11 was 27% as for the subcutaneous administration of insulin. Preparation administered Example 11 Comparative Example 8 Comparative Example 9 AUC 0 → 7 hr
(ng · hr · ml^-1) 29.0 2.6 38.8 Preparation administered Comparative Example 5 Comparative Example 6 Comparative Example 7 AUC 0 → 7 hr
(ng · hr · ml^-1) 2.9 2.5 23.6

To a buffer solution containing G-CSF, a buffer solution containing D-mannitol and aminoalkylmethacrylate copolymer E (Eudragit E100) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 10.0% (w/w) Eudragit E100 7.5% (w/w) D-mannitol 75.2% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing G-CSF, a buffer solution containing D-mannitol and poly-L-arginine was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 10.0% (w/w) Poly-L-arginine 7.5% (w/w) D-mannitol 75.2% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing G-CSF, a buffer solution containing D-mannitol and diethylaminoethyl (DEAE)-dextran was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 10.0% (w/w) DEAE-dextran 7.5% (w/w) D-mannitol 75.2% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing G-CSF, a buffer solution containing D-mannitol and chitosan was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. G-CSF 10.0% (w/w) Chitosan 7.5% (w/w) D-mannitol 75.2% (w/w) Buffer components appropriate amounts Total 100 % (w/w).

Male beagles were used in this experiment. The preparations from Examples 12 and comparative Examples 10-12 were separately packed in gelatin capsules such that each capsule would give the dog 50 µg of G-CSF per kg of body weight. The gelatin capsule was mounted in Publizer™ (Ishikawa Seisakusho) having a silicone tube about 5.0 cm in length bonded to its tip. Then, the silicone tube portion was inserted into the nasal cavity of each dog through one of the nostrils, followed by pressing the rubber ball portion of the Publizer™ to administer the preparation. After the administration, blood samples were taken from the forearm vein at regular intervals. Blood G-CSF levels were determined by ELISA. Table 8 shows the values of area under the blood G-CSF level vs time curve (AUC_G) for the preparations tested. As a result, it was found that the powder preparation containing Eudragit E100 exhibits the highest AUC_G value. From the above, it became evident that the absorption promoting effect of Eudragit E100 is superior to that of the other polycations, i.e. poly-L-arginine, DEAE-dextran and chitosan. Preparation administered Example 12 Comparative Example 10 AUC_G 0 → 31 hr
(ng · hr · ml^-1) 46.4 35.7 Preparation administered Comparative Example 11 Comparative Example 12 AUC_G 0 → 31 hr
(ng· hr · ml^-1) 22.9 42.8

To a buffer solution containing erythropoietin, a buffer solution containing sucrose, aminoalkylmethacrylate copolymer E (Eudragit E100) and hydroxypropylmethyl cellulose (HPMC) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. Erythropoietin 30% (w/w) Eudragit E100 30% (w/w) HPMC 10% (w/w) Sucrose 15% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing erythropoietin, a buffer solution containing sucrose and hydroxypropylmethyl cellulose (HPMC) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. Erythropoietin 30% (w/w) HPMC 10% (w/w) Sucrose 45% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing erythropoietin, a buffer solution containing sucrose, poly-L-arginine and hydroxypropylmethyl cellulose (HPMC) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. Erythropoietin 30% (w/w) Poly-L-arginine 30% (w/w) HPMC 10% (w/w) Sucrose 15% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing erythropoietin, a buffer solution containing sucrose, diethylaminoethyl (DEAE)-dextran and hydroxypropylmethyl cellulose (HPMC) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. Erythropoietin 30% (w/w) DEAE-dextran 30% (w/w) HPMC 10% (w/w) Sucrose 15% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing erythropoietin, a buffer solution containing sucrose, chitosan and hydroxypropylmethyl cellulose (HPMC) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. Erythropoietin 30% (w/w) Chitosan 30% (w/w) HPMC 10% (w/w) Sucrose 15% (w/w) Buffer components appropriate amounts Total 100% (w/w)

Erythropoietin was dissolved in a buffer solution to prepare a liquid preparation for subcutaneous administration having the following concentration. Erythropoietin 250 µg/ml

The preparations from Example 13 and Comparative Examples 13-16 were administered to male beagles through the nose; and the preparation from Comparative Example 17 was administered to male beagles subcutaneously. For the pernasal administration group, individual preparations were packed in gelatin capsules such that each capsule would give the dog 120 µg of erythropoietin per kg of body weight. The gelatin capsule was mounted in Publizer™ (Ishikawa Seisakusho) having a silicone tube about 5.0 cm in length bonded to its tip. Then, the silicone tube portion was inserted into the nasal cavity of each dog through one of the nostrils, followed by pressing the rubber ball portion of the Publizer™ to administer the preparation. In the subcutaneous administration group, the preparation from Comparative Example 17 was administered subcutaneously to the back of each dog such that 5 µg of erythropoietin was administered per kg of body weight. After the administration, blood samples were taken from the forearm vein at regular intervals. Blood erythropoietin levels were determined by ELISA. Table 9 shows the value of area under the blood erythropoietin level vs time curve (AUC) for each preparation. As a result, it was found that Eudragit E100 remarkably promotes the pernasal absorption of erythropoietin. Further, its absorption promoting effect was superior to the effect of poly-L-arginine, DEAE-dextran and chitosan. The bioavailability of the erythropoietin in the preparation of Example 13 was 15% relative as for the subcutaneous administration of erythropoietin. Preparation administered Example 13 Comparative Example 13 Comparative Example 14 AUC 0 → 11 hr
(U · hr · ml^-1) 29.1 1.5 19.1 Preparation administered Comparative Example 15 Comparative Example 16 Comparative Example 17 AUC 0 → 11 hr
(U ·hr · ml^-1) 6.6 20.2 7.9 (1 µg of erythropoietin is equivalent to 130 U.)

To a buffer solution containing growth hormone, a buffer solution containing D-mannitol and aminoalkylmethacrylate copolymer E (Eudragit E100) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. Growth hormone 10.0% (w/w) Eudragit E100 7.5% (w/w) D-mannitol 75.2% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing growth hormone, a buffer solution containing D-mannitol was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the following formula. Growth hormone 10.0% (w/w) D-mannitol 82.7% (w/w) Buffer components appropriate amounts Total 100% (w/w)

Male beagles were used in this experiment. The preparations from Example 14 and Comparative Example 18 were separately packed in gelatin capsules such that each capsule would give the dog 50 µg of growth hormone per kg of body weight. The gelatin capsule was mounted in Publizer™ (Ishikawa Seisakusho) having a silicone tube about 5.0 cm in length bonded to its tip. Then, the silicone tube portion was inserted into the nasal cavity of each dog through one of the nostrils, followed by pressing the rubber ball portion of the Publizer™ to administer the preparation. After the administration, blood samples were taken from the forearm vein at regular intervals. Blood growth hormone levels were determined by ELISA. Table 10 shows the values of area under the blood growth hormone level vs time curve (AUC) for the preparations tested. As a result, it was found that Eudragit E100 remarkably promotes the pernasal absorption of growth hormone. The absorption ratio for the case where Eudragit E100 was added was 10 times higher than the ratio for the absence of Eudragit E100. Preparation administered Example 14 Comparative Ex. 18 AUC 0 → 11 hr
(ng · hr · ml^-1) 13.0 1.3

To a buffer solution containing influenza A antigen, a buffer solution containing D-mannitol and aminoalkylmethacrylate copolymer E (Eudragit E100) was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the formula below. It should be noted here that the percent by weight of influenza A antigen mentioned below is a value including the buffer components contained in the relevant reagent. Influenza A antigen 4.0% (w/w) Eudragit E100 7.5% (w/w) D-mannitol 81.2% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing influenza A antigen, a buffer solution containing D-mannitol was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the formula below. It should be noted here that the percent by weight of influenza A antigen mentioned below is a value including the buffer components contained in the relevant reagent. Influenza A antigen 4.0% (w/w) D-mannitol 88.7% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing influenza A antigen, a buffer solution containing D-mannitol and poly-L-arginine was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the formula below. It should be noted here that the percent by weight of influenza A antigen mentioned below is a value including the buffer components contained in the relevant reagent. Influenza A antigen 4.0% (w/w) Poly-L-arginine 7.5% (w/w) D-mannitol 81.2% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing influenza A antigen, a buffer solution containing D-mannitol and diethylaminoethyl (DEAE) -dextran was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the formula below. It should be noted here that the percent by weight of influenza A antigen mentioned below is a value including the buffer components contained in the relevant reagent. Influenza A antigen 4.0% (w/w) DEAE-dextran 7.5% (w/w) D-mannitol 81.2% (w/w) Buffer components appropriate amounts Total 100% (w/w)

To a buffer solution containing influenza A antigen, a buffer solution containing D-mannitol and chitosan was added. The resultant mixture was spray-dried to thereby obtain a powder form preparation for pernasal administration having the formula below. It should be noted here that the percent by weight of influenza A antigen mentioned below is a value including the buffer components contained in the relevant reagent. Influenza A antigen 4.0% (w/w) Chitosan 7.5% (w/w) D-mannitol 81.2% (w/w) Buffer components appropriate amounts Total 100% (w/w)

Blood samples were taken from the forearm vein of beagles to be used in the experiment. The preparations from Example 15 and Comparative Examples 19-22 were packed separately in gelatin capsules such that 24 µl of influenza A antigen would be administered per one capsule. The gelatin capsule was mounted in Publizer™ (Ishikawa Seisakusho) having a silicone tube about 5.0 cm in length bonded to its tip. Then, the silicone tube portion was inserted into the nasal cavity of each dog through one of the nostrils, followed by pressing the rubber ball portion of the Publizer™ to administer the preparation.

The preparations from Example 15 and Comparative Examples 19-22 were administered to the beagles through the nose. The grouping of the dogs, the dose and the method of administration were the same as for day 1 of the experiment.

Blood samples were taken from the forearm vein of the beagles administered with influenza A antigen.

The amounts of anti-influenza A antibodies in the sera collected on days 1 and 29 were determined by ELISA. The amounts of antibodies of the two subclasses, IgG1 and IgG2, were determined. Changes in the amounts of anti-influenza A antibodies based on their amounts on day 1 were compared. The amounts of anti-influenza A antibodies were compared as difference in absorbance between wells immobilizing the relevant antigen and wells not immobilizing the antigen. Tables 11 and 12 show the ratios of those individuals on day 29 in which anti-influenza A antibodies were induced (number of dogs: 4 in each group). As a result, it was found that both anti-influenza A-IgG1 and anti-influenza A-IgG2 are most frequently induced in the Eudragit E100-added group. From the above, it became evident that Eudragit E100 is useful as an adjuvant for pernasal vaccines and that the effect thereof is superior to the effect of the other polycations, i.e. poly-L-arginine, DEAE-dextran and chitosan. Preparation administered Example 15 Comparative Example 19 Comparative Example 20 Day 29 (after two sensitizations) 50% 0% 25% Preparation administered Comparative Example 21 Comparative Example 22 Day 29 (after two sensitizations) 0% 50% Preparation administered Example 15 Comparative Example 19 Comparative Example 20 Day 29 (after two sensitizations) 100% 25% 100% Preparation administered Comparative Example 21 Comparative Example 22 Day 29 (after two sensitizations) 25% 25%

By adding a copolymer of aminoalkylmethacrylate or polyvinyl acetal diethylaminoacetate or said cationic polymers plus a viscous polymer to a medicine of high molecular weight for producing a preparation in powder form, it is possible to achieve effective absorption of the medicine of high molecular weight through mucosa.

• <110> KIRIN-AMGEN INC.
• <120> High molecular weight medicine-containing preparation in powder form for administration through mucosa
• <130>
• <140> PCT/JP99/03563
  <141> 1999-07-01
• <150> JP 10-192722
  <151> 1998-07-08
• <150> JP 11-81549
  <151> 1999-03-25
• <160> 3
• <210> 1
  <211> 175
  <212> PRT
• <400> 1
• <210> 2
  <211> 174
  <212> PRT
  <213> Homo sapiens
• <400> 2
• <210> 3
  <211> 175
  <212> PRT
• <400> 3