US4446134A
Expired / Lapsed
US
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Process for heat treatment of aqueous solution containing human blood coagulation factor VIII
Assignee: Tanabe Pharma Corp
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Filing: 1982-02-19
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Granted: 1984-05-01
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Expires: 2002-02-19
Abstract
Abstract Human blood coagulation factor VIII which may have hepatitis virus activity can be virus-inactivated with keeping at a minimum the damage of the factor VIII by heating its aqueous solution at 50 DEG to 80 DEG C. for 3 to 15 hours in the presence of 10% (W/V) or more of at least one principal stabilizer of neutral amino acids, monosaccharides, oligosaccharides, and sugar alcohols and 10% (W/V) or more of at least one auxiliary stabilizer of salts of hydrocarbon and hydroxyhydrocarbon carboxylic acids having 3 to 10 carbon atoms.
Inventors
- 👤 Ryoichi Naito
- 👤 Tadakazu Suyama
- 👤 Yoshiro Iga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:15
CPC Classifications
A; A61; A61K; A61K38/00; A61K38/16; A61K38/17; A61K38/36; A61K38/37; A61K31/00; A61K31/13; A61K31/14; A61L; A61L2/00; A61L2/02; A61L2/04; A61L2103/00; A61L2103/05; A61L2103/09
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
126 words
A process for heat treatment to inactivate the hepatitis virus in a human blood coagulation factor VIII composition, which comprises carrying out the heat treatment at 50° to 80° C. of an aqueous solution containing the human blood coagulation factor VIII for a time sufficient to inactivate the hepatitis virus but to retain the activity of the blood coagulation factor VIII, said heat treatment conducted in the presence of 10% (W/V) or more of at least one principal stabilizer selected from the group consisting of neutral amino acids, monosaccharides, oligosaccharides, and sugar alcohols and 10% (W/V) or more of at least one auxiliary stabilizer selected from the group consisting of salts of hydrocarbon carboxylic acids and hydroxhydrocarbon carboxylic acids, which have 3 to 10 carbon atoms.
Claim 2
Dependent Claim
126 words
A process for heat treatment to inactivate the hepatitis virus in a human blood coagulation factor VIII composition, which comprises carrying out the heat treatment at 50° to 80° C. of an aqueous solution containing the human blood coagulation factor VIII for a time sufficient to inactivate the hepatitis virus but to retain the activity of the blood coagulation factor VIII, said heat treatment conducted in the presence of 10% (W/V) or more of at least one principal stabilizer selected from the group consisting of neutral amino acids, monosaccharides, oligosaccharides, and sugar alcohols and 10% (W/V) or more of at least one auxiliary stabilizer selected from the group consisting of salts of hydrocarbon carboxylic acids and hydroxhydrocarbon carboxylic acids, which have 3 to 10 carbon atoms.
Claim 3
Dependent Claim
25 words
A process according to claim 1, wherein the heat treatment is carried out in the additional presence of 0.1% (W/V) or more of human albumin.
Claim 4
Dependent Claim
43 words
A process according to claim 1 or 2, wherein the salts of organic carboxylic acids are physiologically acceptable salts of propanoic acid, butanoic acid, pentanoic acid, caprylic acid, caproic acid, malonic acid, succinic acid, glutaric acid, adipic acids, citric acid and mandelic acid.
Claim 5
Dependent Claim
18 words
A process according to claim 3, wherein the physiologically acceptable salt is a sodium or a potassium salt.
Claim 6
Dependent Claim
20 words
A process according to claim 1 or 2, wherein the neutral amino acid is present and is gylcine or alanine.
Claim 7
Dependent Claim
19 words
A process according to claim 1 or 2, wherein the monosaccharide is present and is glucose, xylose or fructose.
Claim 8
Dependent Claim
19 words
A process according to claim 1 or 2, wherein the oligosaccharide is present and is maltose, sucrose or lactose.
Claim 9
Dependent Claim
22 words
A process according to claim 1 or 2, wherein the sugar alcohol is present and is mannitol, galacititol, glucosaminitol, sorbitol or galactosaminitol.
Claim 10
Dependent Claim
31 words
A process according to claim 1 or 2, wherein the principal stabilizer and the auxiliary stabilizer are present in amounts of 10 to 30% (W/V) and 10 to 30% (W/V), respectively.
Claim 11
Dependent Claim
25 words
A process according to claim 1 or 2, wherein the auxiliary stabilizer is a salt of hydrocarbon carboxylic acid having 3 to 10 carbon atoms.
Claim 12
Dependent Claim
25 words
A process according to claim 1 or 2, wherein the auxiliary stabilizer is a salt of hydroxyhydrocarbon carboxylic acid having 3 to 10 carbon atoms.
Claim 13
Dependent Claim
19 words
A process according to claim 1 or 2, wherein the heating time is between 3 and 15 hours (inclusive).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |