Expression of GP5-M fusion protein of porcine reproductive and respiratory syndrone virus (PRRSV) and establishment of ELISA diagnose based on the recombinant fusion protein / 生物工程学报
Chinese Journal of Biotechnology
; (12): 259-264, 2005.
Article
ي Zh
| WPRIM
| ID: wpr-249914
المكتبة المسؤولة:
WPRO
ABSTRACT
The cDNA fragment encoding the truncated GP5 and the full-length M protein of Porcine Reproductive and Respiratory Syndrone Virus (PRRSV) were orderly fused to the downstream of glutathione S-transferase (GST) of pGEX-KG expression vector, resulting in the fusion expression plasmid pKG-56. After transformed into E. coli BL21 (DE3) and induced by IPTG, the results of SDS-PAGE showed that the GST-GP5-M fusion protein was expressed in high level. Western-blot was performed to confirm that the expressed fusion protein could specifically react with antiserum against PRRSV. The fusion protein was further purified and used as an antigen to establish a novel PRRSV ELISA diagnose assay (P56-ELISA). Comparison between P56-ELISA and the abroad kit IDEXX-ELISA showed the two methods had 94.1 percent agreement by detecting 205 serum samples, indicating that the indirect P56-ELISA was specific and sensitive. The correlation between virus neutralization antibody of the infected pigs (not convalescent pigs) and antibody response to the fusion protein GP5-M was further studied. The regression function analysis suggested that there was no significant correlation between ELISA antibody response (OD630 nm) to the fusion protein GP5-M in clinical serum and their specific neutralizing titers.
النص الكامل:
1
الفهرس:
WPRIM
الموضوع الرئيسي:
Swine
/
Recombinant Fusion Proteins
/
Enzyme-Linked Immunosorbent Assay
/
Viral Envelope Proteins
/
Open Reading Frames
/
Porcine respiratory and reproductive syndrome virus
/
Porcine Reproductive and Respiratory Syndrome
/
Diagnosis
/
Allergy and Immunology
/
Escherichia coli
نوع الدراسة:
Diagnostic_studies
المحددات:
Animals
اللغة:
Zh
مجلة:
Chinese Journal of Biotechnology
السنة:
2005
نوع:
Article