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  • Title: Polymorphisms in RNA sensing toll like receptor genes and its association with clinical outcomes of dengue virus infection.
    Author: Alagarasu K, Bachal RV, Memane RS, Shah PS, Cecilia D.
    Journal: Immunobiology; 2015 Jan; 220(1):164-8. PubMed ID: 25446400.
    Abstract:
    Functional polymorphisms in RNA recognizing toll like receptors (TLR) 3, 7, 8 and toll-interleukin-1 receptor domain containing adapter protein adapter (TIRAP) coding genes were investigated in 120 dengue cases [87 dengue fever (DF) cases and 33 dengue hemorrhagic fever (DHF) cases] and 109 healthy controls (HC) to identify their association with clinical outcomes of dengue virus infection. Results revealed significantly lower frequency of TLR3 rs3775291 T allele [DHF vs. DF P = 0.015 odds ratio (OR) with 95% confidence interval (CI) 0.390 (0.160–0.880); DHF vs. HC P = 0.018 OR with 95% CI 0.410 (0.170–0.900)] and ‘T’ allele carriers [DHF vs. DF P = 0.008 OR with 95% CI 0.288 (0.115–0.722); DHF vs. HC P = 0.040 OR with 95% CI 0.393 (0.162–0.956)] and higher frequency of TIRAP rs8177374 ‘C/T’ genotype [DHF vs. HC P = 0.020 OR with 95% CI 2.643 (1.167–5.986)] in DHF. Higher frequency of TLR8 rs3764879–rs3764880 haplotype C-A was observed in male DF cases compared to male HC [P = 0.025 OR with 95% CI 2.185 (1.101–4.336)]. The results suggest that TLR3 and TIRAP gene variants influence the risk for DHF.
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