This is a national seroprevalence study conducted in Saudi Arabai in 1991G to determine postvaccination poliovirus antibody. Two hundred and nine children vaccinated with three oral polio vaccines at three, four, and five months of age were included in the study representing the five main regions in Saudi Arabia. Blood samples were collected at the age of nine months. Cytopathic effect (CPE) neutralization was used to determine the level of polio antibody. A dilution of 1/8th or more was defined as positive. Seventy-nine percent, 88% and 65% of the children were positive for Type 1, Type 2, and Type 3, respetively. Development of a new strategy of polio vaccination is needed.
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http://dx.doi.org/10.5144/0256-4947.1994.111 | DOI Listing |
Viruses
November 2024
Department of Industrial Transformation, Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College, Kunming 650000, China.
Cancer Cell
December 2024
State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute & Department of Liver Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Electronic address:
Tumor-initiating cells (TICs) possess the ability to evade anti-tumor immunity, potentially explaining many failures of cancer immunotherapy. Here, we identify CD49f as a prominent marker for discerning TICs in hepatocellular carcinoma (HCC), outperforming other commonly used TIC markers. CD49f-high TICs specifically recruit tumor-promoting neutrophils via the CXCL2-CXCR2 axis and create an immunosuppressive milieu in the tumor microenvironment (TME).
View Article and Find Full Text PDFRev Med Virol
November 2024
Laboratoire de Virologie URL3610, Univ. Lille et CHU Lille, Lille, France.
Enteroviruses (EV) initiate replication by binding to their cellular receptors, leading to the uncoating and release of the viral genome into the cytosol of the host cell. Neutralising antibodies (NAbs) binding to epitopes on enteroviral capsid proteins can inhibit this infectious process through several mechanisms of neutralisation in vitro. Fc-mediated antibody effector functions such as antibody-dependent cell-mediated cytotoxicity and antibody-dependent cellular phagocytosis have also been described for some EV.
View Article and Find Full Text PDFClin Microbiol Infect
October 2024
The Hong Kong Jockey Club Global Health Institute, Hong Kong Special Administrative Region, P. R. China; WHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, P. R. China; Laboratory of Data Discovery for Health Limited (D(2)4H), Hong Kong Science Park, Hong Kong Special Administrative Region, P. R. China; The University of Hong Kong-Shenzhen Hospital, Shenzhen, P. R. China.
Objectives: This study aimed to assess the long-term persistence of neutralizing antibodies (nAb) titres and seroprotection proportions after the fourth and fifth doses of inactivated polio vaccine (IPV).
Methods: Serum samples from 299 children in Hong Kong were collected and used to estimate the persistence of nAb titres and seroprotection proportions by neutralisation test.
Results: The mean nAb titres against poliovirus types 1, 2, and 3 (PV1, PV2, and PV3) 1 month after receiving the fourth dose of IPV at 19 months of age were 2068 (95% credible interval, 1517-2864); 4705 (3439-6436); and 2758 (1894-4086); respectively, but declined substantially in 4 years to 268 (222-325), 751 (630-900), and 411 (323-521), respectively.
Immunol Rev
November 2024
Laboratory of Immunogenetics of Pediatric Autoimmune Diseases, Imagine Institute, Université Paris Cité, INSERM UMR 1163, Paris, France.
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