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Clinical significance of the single nucleotide polymorphism TLR2 R753Q in heart transplant recipients at risk for cytomegalovirus disease.
Schneider, M; Matiqi, T; Kundi, M; Rieder, FJ; Andreas, M; Strassl, R; Zuckermann, A; Jungbauer, C; Steininger, C;
J Clin Virol. 2016; 84:64-69
Originalarbeiten (Zeitschrift)


Jungbauer Christof


The toll-like receptor 2 (TLR2) is a significant component of innate immunity against cytomegalovirus (CMV) infection but information on the clinical significance of the single nucleotide polymorphism (SNP) (R753Q) is conflicting.
The inconsistent observations of the immunological and clinical significance of the TLR2 R753Q polymorphism for CMV infection indicates the influence of confounders.
The presence of the TLR2 polymorphism was determined by a genotyping assay of 175 HTX patients and 281 healthy blood donors and evaluated in relation to selected virological and clinical parameters.
Relative frequency of TLR2 polymorphism was similar in HTX patients and blood donors (homozygous wild-type, 94.3% vs. 94.0%; heterozygous, 5.1% vs. 5.7%; homozygous mutated, <1%). CMV viremia was detectable in 108 (61.7%) of HTX patients. The TLR2 polymorphism was neither associated with occurrence or level of CMV infection nor with survival, graft failure or rejection, or CMV serostatus of patient before transplantation. Nevertheless, CMV viremia occurred in 83.1% of R+/D+, 77.1% of R+/D-, and 64.3% of R-/D+ patients. Time of first CMV viremia was in R-/D+ patients later than in CMV-seropositive patients (median, 182days versus 23 days; P<0.001) corresponding to the duration of antiviral prophylaxis in R-/D+ patients.
The TLR2 R753Q polymorphism is extremely rare in the general population and HTX patients. Screening for this risk factor of CMV disease may not be cost-effective in contrast to testing for CMV viremia.

Useful keywords (using NLM MeSH Indexing)




Antiviral Agents/therapeutic use



Cytomegalovirus Infections/etiology

Cytomegalovirus Infections/genetics*

Cytomegalovirus Infections/prevention*


Cytomegalovirus Infections/virology



Heart Transplantation/adverse effects*



Middle Aged

Polymorphism, Single Nucleotide*

Risk Factors

Toll-Like Receptor 2/genetics*

Transplant Recipients*

Young Adult

Find related publications in this database (Keywords)

TLR2 polymorphism
Heart transplantation
CMV infection