Document Detail

Epitopes of the highly immunogenic Trichomonas vaginalis α-actinin are serodiagnostic targets for both women and men.
MedLine Citation:
PMID:  23616456     Owner:  NLM     Status:  MEDLINE    
There is a need for a point-of-care serodiagnostic test for women and men for sexually transmitted infections (STIs) caused by Trichomonas vaginalis. Sera from women with this STI and sera from men that were analyzed in studies showing a relationship between serostatus and prostate cancer are highly seropositive in response to trichomonad α-actinin and its truncated protein (ACT-P2) (positive control sera). Epitope mapping experiments showed that positive control sera from women had antibodies to 13 distinct epitopes, 5 of which were detected by positive control sera from men. Sera from women and men that were unreactive with α-actinin (negative control sera) failed to detect any of the epitopes or other α-actinin amino acid sequences. The T. vaginalis α-actinin amino acid sequence and the sequences of the epitopes showed little or no identity with those of other proteins of microbial pathogens or the human α-actinin 1 (HuACTN1) homolog. Immunoassays such as dot blot, immunoblot, and enzyme-linked immunosorbent assays were used. Positive control sera did not detect HuACTN1 in immunoassays, and the range of levels of identity of α-actinin epitopes with HuACTN1 was 0% to 50%. Comparison of the T. vaginalis α-actinin epitopes with proteins in data banks, such as Tritrichomonas suis, Candida albicans, and Saccharomyces cerevisiae proteins, gave a range of identity levels of 0% to 22%. Specific 15-mer peptide epitopes of α-actinin with low to no identity with other proteins were synthesized and were reactive with positive control sera only. These findings identify epitopes of α-actinin as candidate serodiagnostic targets and suggest strongly that a highly seropositive reaction to α-actinin suggests exposure to T. vaginalis.
Calvin J Neace; J F Alderete
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2013-04-24
Journal Detail:
Title:  Journal of clinical microbiology     Volume:  51     ISSN:  1098-660X     ISO Abbreviation:  J. Clin. Microbiol.     Publication Date:  2013 Aug 
Date Detail:
Created Date:  2013-07-17     Completed Date:  2014-01-21     Revised Date:  2014-02-04    
Medline Journal Info:
Nlm Unique ID:  7505564     Medline TA:  J Clin Microbiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2483-90     Citation Subset:  IM    
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MeSH Terms
Actinin / diagnostic use*,  immunology
Antibodies, Protozoan / blood*
Antigens, Protozoan / diagnostic use*,  immunology
Clinical Laboratory Techniques / methods*
Parasitology / methods*
Point-of-Care Systems
Trichomonas Infections / diagnosis*
Trichomonas vaginalis / immunology*
Reg. No./Substance:
0/Antibodies, Protozoan; 0/Antigens, Protozoan; 11003-00-2/Actinin

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

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