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Preparation of Equine Immunoglobulin F(ab')2 against Smallpox and Evaluation of its Immunoprotective Effect.
- Source :
- Zoonoses (2737-7466); 2023, Vol. 3 Issue 1, p1-7, 7p
- Publication Year :
- 2023
-
Abstract
- Objective: Smallpox, a severe infectious disease caused by the smallpox virus, causes a death rate as high as 30% within 15-20 days after infection. Therefore, development of anti-Smallpox product as a strategic reserve is urgently needed. Methods: We prepared and tested pepsin-digested F(ab')<subscript>2</subscript> fragments of serum IgG from horses. Results: Transmission electron microscopy indicated that the purified virus showed morphology consistent with VVTT. The titer was above 1.0 × 107 PFU/mL. The purity of the antigen exceeded 90%, according to HPLC. After purification and cleavage, the yield of the purified product F(ab')<subscript>2</subscript> was approximately 1.3%, its purity exceeded 90%, and the neutralizing antibody titer exceeded 1:3200. F(ab')<subscript>2</subscript> fragments had good preventive and therapeutic effects in mice at antibody doses of 5.2 mg/mL and 2.6 mg/mL. The viral loads of the drug-treated mice were suppressed to varying degrees, and the higher dose groups (5.2 and 2.6 mg/mL) showed a 2-3 fold lower viral load than that in the control group. Conclusion: A process for producing equine immunoglobulin F(ab')<subscript>2</subscript> against VVTT was established. The prepared horse anti-smallpox immunoglobulin product had good neutralizing antibody effects on VVTT. The highly purified preparation may serve as a potential candidate for smallpox treatment. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 27377466
- Volume :
- 3
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Zoonoses (2737-7466)
- Publication Type :
- Academic Journal
- Accession number :
- 175625668
- Full Text :
- https://doi.org/10.15212/ZOONOSES-2022-0048