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- Title
Coronaviral hypothetical and structural proteins were found in the intestinal surface enterocytes and pneumocytes of severe acute respiratory syndrome (SARS).
- Authors
Chan, Wai S.; Chun Wu; Chow, Sammy C. S.; To Cheung; Ka-Fai To; Wai-Keung Leung; Chan, Paul K. S.; Kam-Cheong Lee; Ho-Keung Ng; Au, Deborah M. Y.; Lo, Anthony W. I.; Wu, Chun; Cheung, To; To, Ka-Fai; Leung, Wai-Keung; Lee, Kam-Cheong; Ng, Ho-Keung
- Abstract
Severe acute respiratory syndrome (SARS) is a newly emerging infectious disease that haunted the world from November 2002 to July 2003. Little is known about the biology and pathophysiology of the novel coronavirus that causes SARS. The tissue and cellular distributions of coronaviral hypothetical and structural proteins in SARS were investigated. Antibodies against the hypothetical (SARS 3a, 3b, 6, 7a and 9b) and structural proteins (envelope, membrane, nucleocapsid and spike) of the coronavirus were generated from predicted antigenic epitopes of each protein. The presence of these proteins were first verified in coronavirus-infected Vero E6 tissue culture model. Immunohistochemical studies on different human tissues, including a cohort of nine autopsies, two liver biopsies and intestinal biopsies of SARS patients, further confirmed the existence of coronaviral hypothetical and structural proteins in the cytoplasm of pneumocytes and small intestinal surface enterocytes in SARS patients. With this vast array of antibodies, no signal was observed in other cell types including those organs in which reverse transcriptase-polymerase chain reactions were reported to be positive. Structural proteins and the functionally undefined hypothetical proteins were expressed in coronavirus-infected cells with distinct expression pattern in different organs in SARS patients. These antipeptide antibodies can be useful for the diagnosis of SARS at the tissue level.
- Subjects
SARS disease; CORONAVIRUSES; PROTEINS; IMMUNOHISTOCHEMISTRY; POLYMERASE chain reaction; GENE expression; PROTEIN metabolism; ANIMAL experimentation; COMPARATIVE studies; EPITHELIAL cells; LUNGS; RESEARCH methodology; MEDICAL cooperation; RESEARCH; VIRAL antibodies; FLUORESCENCE in situ hybridization; EVALUATION research
- Publication
Modern Pathology, 2005, Vol 18, Issue 11, p1432
- ISSN
0893-3952
- Publication type
journal article
- DOI
10.1038/modpathol.3800439