A kind of interleukin 29 mutant protein preparation

A technology of interleukin and mutants, applied in the direction of peptide/protein components, antiviral agents, and resistance to vector-borne diseases, etc., to achieve the effect of reducing degradation and aggregation, ensuring non-irritating, and high safety

Active Publication Date: 2022-06-14
杭州先为达生物科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Whether it is type I interferon, type II interferon or type III interferon, as a protein drug, due to factors such as poor stability, low activity, and short half-life in vivo Very limited in clinical use

Method used

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  • A kind of interleukin 29 mutant protein preparation
  • A kind of interleukin 29 mutant protein preparation
  • A kind of interleukin 29 mutant protein preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1IL-29

[0071] Preparation of embodiment 1 IL-29 mutant protein

[0072] 1.1 Construction of mutant protein expression engineering bacteria

[0073] The IL-29 mutant protein gene fragment SEQ ID NO:11-17 was obtained by chemical synthesis, and the above fragment was inserted into the prokaryotic expression plasmid pET-30a(+) (Novagen) through the NodeI and XhoI sites and verified by sequencing . Resulting expression plasmids for transformation assays. Transform Escherichia coli BL21(DE3) competent cells (Invitrogen) with the plasmid containing the target gene obtained above, put 50 μL of BL21 competent cells on an ice bath to melt, add the plasmid, shake gently, and place in an ice bath 30 minutes. Then heat shock in a water bath at 42°C for 30 seconds, then quickly transfer the centrifuge tube to an ice bath and let it stand for 2 minutes without shaking the centrifuge tube during this process. Add 500 μL of sterile LB medium (without antibiotics) to the centrifuge tube, mix well...

Embodiment 2

[0081] Embodiment 2 detects various indicators of the IL-29 mutant obtained

[0082] 2.1 The molecular weight and purity of IL-29 mutant obtained by SDS-PAGE electrophoresis

[0083] Using the SDS-PAGE electrophoresis loading buffer, in the case of adding mercaptoethanol, the Marker and 10 μg of the protein obtained above were loaded separately, and electrophoresis was performed. The electrophoresis condition was 200V constant voltage for 45 minutes. Stained with Coomassie Brilliant Blue G-25 to detect protein molecular weight and purity, the results are shown in figure 1 and 2 shown.

[0084] Depend on figure 1 and 2 It can be seen that the molecular weights of the IL29 mutant protein and the reference substance are 20 kDa respectively, indicating that the obtained target protein is correct, with only one band without other impurities, and the purity can reach 100%.

[0085] 2.2 In vitro RP-HPLC purity of IL-29 mutants detected by chromatography

[0086] 2.2.1 Reversed ...

Embodiment 3I

[0102] The 50 ℃ stability detection result of embodiment 3 IL-29 mutants

[0103] The stability of the protein in this application is mainly characterized by reversed-phase HPLC purity.

[0104] Under the conditions of 50°C ± 2°C / 75% relative humidity ± 5% relative humidity, samples were taken according to Table 4, and the reverse phase of each test product of IL-29 mutant was carried out in the same way as 2.2.1 in Example 2 For HPLC purity determination, the same method as 2.3 in Example 2 was used to measure the biological activity of each test product of the IL-29 mutant, and the results are shown in Table 5. Simultaneously compare the chromatograms of the purity values ​​of 0 days and 14 days in Table 5, see for details Figure 3-10 .

[0105] Table 4 Stability verification scheme of IL-29 mutants at 50°C

[0106]

[0107] Table 5 Determination results of RP-HPLC purity of IL-29 mutants at 50°C

[0108]

[0109]

[0110] From Table 5 above and Figure 3-10 T...

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Abstract

The present application discloses an interleukin 29 mutant protein preparation, which is characterized in that it comprises: an interleukin 29 mutant protein, a buffer system, a metal ion chelating agent and an osmotic pressure regulator. The IL-29 mutant protein preparation of the present application greatly reduces the degradation and aggregation of the IL-29 mutant protein during storage, and the growth rate of impurities in the IL-29 mutant protein preparation is slow, which significantly improves the IL-29 mutant protein preparation. 29 Mutant protein stability.

Description

technical field [0001] This application belongs to the field of pharmaceutical preparations. Specifically relates to an interleukin 29 (IL-29) mutant protein preparation. Background technique [0002] Interferon is an important family cytokine with broad-spectrum antiviral and immunomodulatory effects. To date, seven (alpha, beta, omega, delta, tau, gamma, lambda) forms of interferon have been identified, which fall into three broad groups: type I, type II and type III. So-called "type I" interferons include interferon alpha, interferon beta, interferon omega, interferon delta, interferon tau. Currently, interferon gamma is the only type II interferon. Type III interferons are a recently discovered family of cytokines that include interferons λ1, λ2, and λ3, also known as IL-28A, IL-28B, and IL-29. [0003] IL-28A, IL-28B and IL-29 share sequence homology with type I interferon and gene sequence homology with IL-10. Functionally, IL-28 and IL-29 are similar to type I in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K38/21A61K38/20A61K47/02A61K47/18A61P31/12A61P37/02
CPCA61K38/217A61K38/20A61K47/02A61K47/183A61P31/12A61P37/02Y02A50/30
Inventor 杨柳李岩冯静王宏阳郭万军潘海
Owner 杭州先为达生物科技股份有限公司
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