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Highly Concentrated Stabilized Igm Solution

Inactive Publication Date: 2007-09-13
CHUGAI PHARMA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0027] As a result of dedicated research to solve the above-mentioned problems, the present inventors discovered that, by using compounds comprising polyvalent cationic ions such as magnesium chloride and arginine hydrochloride as additives, aggregation of IgM in solutions may be suppressed and stable highly concentrated IgM solutions may be prepared.

Problems solved by technology

Therefore, industrial scale production of recombinant IgM had been considered difficult.
IgM is also very unstable compared to IgG and has a low solubility.
Therefore, the production of a highly concentrated and stable IgM solution is difficult.
Furthermore, according to the report, IgM easily aggregates and precipitates during storage.
It was especially difficult to ensure an IgM stability sufficient enough to withstand pharmaceutical use only through optimization of pH and buffer type.
Therefore, IgM has the distinctive problem of being very difficult to be highly concentrated.
However, this report relates to the reconstitution of euglobulin precipitates, and does not provide any disclosures relating to suppression of increase in water-soluble aggregates of IgM.
However, the resulting recovery rate of IgM varies from 40% to >90% depending on antibodies or batch, indicating a low reproducibility.
Additionally, although the Methods section describes that 5 to 10 mg / mL of purified antibodies were stored at 4° C. and −20° C., the Results section only describes that the antibodies could be stored for a few months at −20° C. without loss of function, and does not mention anything regarding storage at 4° C. or higher, at which temperature it is usually difficult to ensure stability.
Accordingly, this report suggests the difficulty of reproducing precipitate reconstitution and the difficulty of ensuring stability during storage, when trying to provide a highly concentrated solution of IgM as a pharmaceutical product or a bulk drug substance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0096] In the following Examples, recombinant anti-ganglioside GM3 human antibody produced in Reference Example 1 (hereinafter, referred to as “MABON-01”) was used as the IgM. The MABON-01 solution was concentrated to prepare a highly concentrated solution of approximately 9 mg / mL. For buffer replacement, this solution was dialyzed against buffers 1 to 6 as listed below using a dialysis membrane, SLIDE-A-LYZER Dialysis Cassette 10000MWCO (PIERCE). [0097] 1. 20 mM sodium acetate, 300 mM NaCl, pH 5.0 / acetate pH 5.0 [0098] 2. 20 mM sodium acetate, 300 mM NaCl, pH 5.5 / acetate pH 5.5 [0099] 3. 20 mM sodium acetate, 300 mM NaCl, pH 6.0 / acetate pH 6.0 [0100] 4. 20 mM sodium citrate, 300 mM NaCl, pH 5.0 / citrate pH 5.0 [0101] 5. 20 mM sodium citrate, 300 mM NaCl, pH 5.5 / citrate pH 5.5 [0102] 6. 20 mM sodium citrate, 300 mM NaCl, pH 6.0 / citrate pH 6.0

[0103] The resulting solutions were collected, and the concentration of MABON-01 in each sample was adjusted to 8.4 mg / mL. Each sample was plac...

example 2

[0106] The MABON-01 solution was concentrated to prepare a highly concentrated solution of approximately 18 mg / mL. This solution was dialyzed using a dialysis membrane, SLIDE-A-LYZER Dialysis Cassette 10000MWCO (PIERCE), to replace the buffer with a solution comprising 20 mM citric acid and 300 mM NaCl (pH 5.5) (the buffer type and pH were optimized under conditions without additives). This highly concentrated MABON-01 solution was dialyzed against the following buffers 1 to 9 using EasySep (TOMY) to replace the buffer. [0107] 1. 20 mM sodium citrate, 300 mM NaCl, pH 5.5 / no additives [0108] 2. 20 mM sodium citrate, 900 mM NaCl, pH 5.5 / NaCl [0109] 3. 20 mM sodium citrate, 300 mM NaCl, 200 mM MgCl2, pH 5.5 / MgCl2 [0110] 4. 20 mM sodium citrate, 300 mM NaCl, 200 mM Na2SO4, pH 5.5 / Na2SO4 [0111] 5. 20 mM sodium citrate, 300 mM NaCl, 100 mM sodium L-glutamate, pH 5.5 / sodium L-glutamate [0112] 6. 20 mM sodium citrate, 300 mM NaCl, 100 mM L-arginine hydrochloride, pH 5.5 / L-arginine hydrochlo...

example 3

[0121] MABON-01 solution was concentrated to prepare a highly concentrated MABON-01 solution of approximately 19 mg / mL. The solution was dialyzed against the following buffers 1 to 9 using a dialyzer membrane, EasySep (TOMY), to replace the buffer. [0122] 1. 20 mM sodium citrate, 300 mM NaCl, pH 5.5 [0123] 2. 20 mM sodium citrate, 300 mM NaCl, 10 mM MgCl2, pH 5.5 [0124] 3. 20 mM sodium citrate, 300 mM NaCl, 50 mM MgCl2, pH 5.5 [0125] 4. 20 mM sodium citrate, 300 mM NaCl, 200 mM MgCl2, pH 5.5 [0126] 5. 20 mM sodium citrate, 300 mM NaCl, 200 mM MgCl2, 100 mM trehalose, pH 5.5 [0127] 6. 20 mM sodium citrate, 300 mM NaCl, 10 mM L-arginine hydrochloride, pH 5.5 [0128] 7. 20 mM sodium citrate, 300 mM NaCl, 50 mM L-arginine hydrochloride, pH 5.5 [0129] 8. 20 mM sodium citrate, 300 mM NaCl, 100 mM L-arginine hydrochloride, pH 5.5 [0130] 9. 20 mM sodium citrate, 300 mM NaCl, 100 mM L-arginine hydrochloride, 100 mM trehalose, pH 5.5

[0131] The resulting solutions were collected, and the conce...

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Abstract

The present inventors discovered that stable and highly concentrated IgM solutions can be prepared by using, as an additive, a compound comprising a polyvalent cationic ion, such as magnesium chloride or arginine hydrochloride, to suppress IgM aggregation in solutions.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is the National Stage of International Application No. PCT / JP2004 / 014935, filed on Oct. 8, 2004, which claims the benefit of Japanese Patent Application Serial No. 2003-351388, filed on Oct. 9, 2003. The contents of both of the foregoing applications are hereby incorporated by reference in their entireties. TECHNICAL FIELD [0002] The present invention relates to highly concentrated and stabilized IgM solutions, and production thereof. BACKGROUND ART [0003] Many higher animals have five different classes of immunoglobulins, IgG, IgA, IgM, IgD, and IgE. Each immunoglobulin class differs in properties such as size, charge, amino acid composition, and sugar content. Of these classes, IgM accounts for approximately 10% of all plasma immunoglobulins. IgM is the major component of early antibodies produced against cell-membrane antigens, infectious microorganisms, or soluble antigens, which have a complex antigenicity. [0004] ...

Claims

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Application Information

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IPC IPC(8): A61K39/395A61K31/70A61K9/00A61K31/198A61K31/7016A61K47/02A61K47/12A61K47/18A61K47/26A61P35/00C07K16/00C07K16/30
CPCA61K39/39558A61K39/39591C07K2317/52A61K31/198C07K2317/21A61K31/7016C07K16/3084A61K9/0019A61K47/183A61K47/26A61K47/12A61K9/0095A61K47/18A61K47/02A61K2300/00A61P35/00A61P37/02
Inventor IGAWA, TOMOYUKISEKIMORI, YASUO
Owner CHUGAI PHARMA CO LTD
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