Antiviral Activity of Recombinant Porcine Interferon-α Against Porcine Transmissible Gastroenteritis Virus in PK-15 Cells
Bir rekombinant domuz interferon alfa (rPoIFN-?) geliştirilmiş ve patenti daha öncesinde alınmıştı (Çin patent numarası ZL200810020180.4). Bu çalışmada, rPoIFN-?'nın farlı dozlarının domuz transmissible gastroenteritis virüs (TGEv)'ün üremesi üzerindeki baskılayıcı etkisi domuz böbrek hücre kültüründe (PK-15) araştırıldı. rPoIFN-? ile viral büyümenin baskılanmasını kantitatif olarak belirlemek için TCID50 testi, plak oluşum testi, gerçek zamanlı qRT-PCR, western blot ve immunfloresan teknikleri viral enfeksiyöz partiküllerin değişimlerini, viral genom kopya sayılarını ve viral protein ekspresyon seviyelerini belirlemek amacıyla uygulandı. Araştırma sonuçları test edilen üç rPoIFN-?'nın da PK-15 hücrelerinde TGEv ile oluşturulmuş sitopatik etkisinin aynı derecede olduğunu göstermiştir. rPoIFN-?, TGEv proliferasyonunu insan IFN-? ürününden daha güçlü olarak inhibe etti. Kültürde TGEv büyümesine rPoIFN-?'nın baskılayıcı aktivitesi doza bağımlı olup aktivite rPoIFN-?'nın azalan dozu ile göreceli olarak azalma gösterdi
PK-15 Hücrelerinde Domuz Transmissible Gastroenteritis Virüsüne Karşı Rekombinant Domuz İnterferon-α’nın Antiviral Aktivitesi
A recombinant porcine interferon alpha (rPoIFN-α) has been developed and patented previously (Chinese patent number ZL200810020180.4). In the current study, we investigated the inhibitory effects of the rPoIFN-α on the propagation of porcine transmissible gastroenteritis virus (TGEv) at different doses in porcine kidney cell line (PK-15). To quantitatively determine the inhibition of viral growth by rPoIFN-α, TCID50 assay, plaque formation assay, real-time qRT-PCR, western blot and immunofluorescence assay were adopted to evaluate the changes of viral infectious particles, viral genome copy numbers and viral protein expression levels respectively. The results demonstrated that all the three batches of the rPoIFN-α tested inhibited TGEvinduced cytopathic effect in PK-15 cells with very similar potency. rPoIFN-α inhibited TGEv proliferation more strongly than human IFN-α product. The inhibitory activity of rPoIFN-α on TGEv growth in culture was dose dependent, and the activity was gradually reduced with the decreasing of the concentration of rPoIFN-α
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