AIM: The resurgence of severe acute respiratory syndrome (SARS) is still a threat because the causative agent remaining in animal reservoirs is not fully understood, and sporadic cases continue to be reported. Developing high titers of anti-SARS hyperimmune globulin to provide an alternative pathway for emergent future prevention and treatment of SARS. METHODS: SARS coronavirus (CoV)F69 (AY313906) and Z2-Y3 (AY394989) were isolated and identified from 2 different Cantonese onset SARS patients. Immunogen was prepared from SARS-CoV F69 strain. Six health horses were immunized 4 times and serum was collected periodically to measure the profile of specific IgG and neutralizing antibodies using indirect enzyme-linked immunosorbent assay and a microneutralization test. Sera were collected in large amounts at the peak, where IgG was precipitated using ammonium sulphate and subsequently digested with pepsin. The product was then purified using anion-exchange chromatography to obtain F(ab')2 fragments. RESULTS: The specific IgG and neutralizing antibody titers peaked at approximately week 7 after the first immunization, with a maximum value of 1:14210. The sera collected at the peak were then purified. Fragment of approximately 15 g F(ab')2 was obtained from 1litre antiserum and the purity was above 90% with the titer of 1:5120, which could neutralize the other strain (SARS-CoV Z2-Y3) as well. CONCLUSION: This research provides a viable strategy for the prevention and treatment of SARS coronavirus infection with equine hyperimmune globulin, with the purpose of combating any resurgence of SARS.
AIM: The resurgence of severe acute respiratory syndrome (SARS) is still a threat because the causative agent remaining in animal reservoirs is not fully understood, and sporadic cases continue to be reported. Developing high titers of anti-SARS hyperimmune globulin to provide an alternative pathway for emergent future prevention and treatment of SARS. METHODS:SARS coronavirus (CoV)F69 (AY313906) and Z2-Y3 (AY394989) were isolated and identified from 2 different Cantonese onset SARSpatients. Immunogen was prepared from SARS-CoV F69 strain. Six health horses were immunized 4 times and serum was collected periodically to measure the profile of specific IgG and neutralizing antibodies using indirect enzyme-linked immunosorbent assay and a microneutralization test. Sera were collected in large amounts at the peak, where IgG was precipitated using ammonium sulphate and subsequently digested with pepsin. The product was then purified using anion-exchange chromatography to obtain F(ab')2 fragments. RESULTS: The specific IgG and neutralizing antibody titers peaked at approximately week 7 after the first immunization, with a maximum value of 1:14210. The sera collected at the peak were then purified. Fragment of approximately 15 g F(ab')2 was obtained from 1litre antiserum and the purity was above 90% with the titer of 1:5120, which could neutralize the other strain (SARS-CoV Z2-Y3) as well. CONCLUSION: This research provides a viable strategy for the prevention and treatment of SARS coronavirus infection with equine hyperimmune globulin, with the purpose of combating any resurgence of SARS.
Authors: Christian Drosten; Stephan Günther; Wolfgang Preiser; Sylvie van der Werf; Hans-Reinhard Brodt; Stephan Becker; Holger Rabenau; Marcus Panning; Larissa Kolesnikova; Ron A M Fouchier; Annemarie Berger; Ana-Maria Burguière; Jindrich Cinatl; Markus Eickmann; Nicolas Escriou; Klaus Grywna; Stefanie Kramme; Jean-Claude Manuguerra; Stefanie Müller; Volker Rickerts; Martin Stürmer; Simon Vieth; Hans-Dieter Klenk; Albert D M E Osterhaus; Herbert Schmitz; Hans Wilhelm Doerr Journal: N Engl J Med Date: 2003-04-10 Impact factor: 91.245
Authors: Thomas G Ksiazek; Dean Erdman; Cynthia S Goldsmith; Sherif R Zaki; Teresa Peret; Shannon Emery; Suxiang Tong; Carlo Urbani; James A Comer; Wilina Lim; Pierre E Rollin; Scott F Dowell; Ai-Ee Ling; Charles D Humphrey; Wun-Ju Shieh; Jeannette Guarner; Christopher D Paddock; Paul Rota; Barry Fields; Joseph DeRisi; Jyh-Yuan Yang; Nancy Cox; James M Hughes; James W LeDuc; William J Bellini; Larry J Anderson Journal: N Engl J Med Date: 2003-04-10 Impact factor: 91.245
Authors: Thijs Kuiken; Ron A M Fouchier; Martin Schutten; Guus F Rimmelzwaan; Geert van Amerongen; Debby van Riel; Jon D Laman; Ton de Jong; Gerard van Doornum; Wilina Lim; Ai Ee Ling; Paul K S Chan; John S Tam; Maria C Zambon; Robin Gopal; Christian Drosten; Sylvie van der Werf; Nicolas Escriou; Jean-Claude Manuguerra; Klaus Stöhr; J S Malik Peiris; Albert D M E Osterhaus Journal: Lancet Date: 2003-07-26 Impact factor: 79.321
Authors: Mariette Barbier; Katherine S Lee; Mayur S Vikharankar; Shriram N Rajpathak; Nandkumar Kadam; Ting Y Wong; Brynnan P Russ; Holly A Cyphert; Olivia A Miller; Nathaniel A Rader; Melissa Cooper; Jason Kang; Emel Sen-Kilic; Zeriel Y Wong; Michael T Winters; Justin R Bevere; Ivan Martinez; Rachayya Devarumath; Umesh S Shaligram; F Heath Damron Journal: Front Immunol Date: 2022-08-15 Impact factor: 8.786