Document Detail

Extension of the ELISA method to the measurement of the specific radioactivity of viruses in crude cellular extracts.
MedLine Citation:
PMID:  6885955     Owner:  NLM     Status:  MEDLINE    
The double-antibody sandwich method of ELISA, which allows accurate quantitative determination of plant viruses, was extended to a radiochemical procedure which permits direct measurement of the specific radioactivity of virus labelled in vivo and present in very crude plant homogenates. Evidence is presented showing that 20 to 50% of the virus introduced in the polystyrene wells during the antigen incubation step could be trapped in the sandwich. The percentage of virus bound increased with the concentration of the coating antibody and was almost proportional to the concentration of the antigen and to the incubation time of the antigens. Complete dissociation of the double-antibody sandwich was achieved by incubation with 0.2 M KOH or NaOH (pH 13.3), and the label carried by the virus was measured by scintillation counting of the solubilization fluid. The ratio infected/healthy was much higher for the radiochemical procedure than for the immunosorbent assay itself since binding of the virus to the coating antibody was not accompanied by any nonspecific trapping of radioactive contaminants in the double-antibody sandwich. The procedure was highly sensitive since the background corresponded to the scintillation counting background. The detection of label carried by tobacco mosaic virus was possible when the tobacco samples contained at least 5 ng of virus carrying a label as low as 40 dpm 3H or 20 dpm 14C.
G Konate; B Fritig
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of virological methods     Volume:  6     ISSN:  0166-0934     ISO Abbreviation:  J. Virol. Methods     Publication Date:  1983 Jun 
Date Detail:
Created Date:  1983-10-21     Completed Date:  1983-10-21     Revised Date:  2000-12-18    
Medline Journal Info:
Nlm Unique ID:  8005839     Medline TA:  J Virol Methods     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  347-56     Citation Subset:  IM    
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MeSH Terms
Enzyme-Linked Immunosorbent Assay / methods
RNA, Viral / biosynthesis*
Tobacco Mosaic Virus / growth & development*,  immunology
Viral Proteins / biosynthesis*
Virus Replication*
Reg. No./Substance:
0/RNA, Viral; 0/Viral Proteins

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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