Combination of CTLA-4 and TGFβ1 gene polymorphisms associated with dengue hemorrhagic fever and virus load in a dengue-2 outbreak |
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| Authors: | Rong-Fu Chen Lin Wang Jiin-Tsuey Cheng Hau Chuang Jen-Chieh Chang Jien-Wei Liu I-Chun Lin Kuender D Yang |
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| Institution: | aDepartment of Medical Research, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University, Kaohsiung, Taiwan;bDepartment of Biological Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan;cDivision of Infectious Diseases, Chang Gung Memorial Hospital, Kaohsiung-Medical Center, Kaohsiung, Taiwan |
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| Abstract: | The pathogenesis of dengue hemorrhagic fever (DHF) has been considered to be massive immune activation of T cells. Abnormal expression of the immune regulatory molecules, CTLA-4 and TGFβ1, leads to disturbances of regulatory T cell immune response. We investigate the contribution of CTLA-4 and TGFβ1 in DHF by analyzing them for association with virus load in blood and polymorphisms of CTLA-4 +49A/G, and TGFβ1 −509C/T in a DEN-2 outbreak. The increased frequency of the TGFβ1 −509 CC genotype in patients with DHF was compared to those with dengue fever (OR = 1.9, p = 0.034). Moreover, the presence of the CTLA-4 +49 G allele and TGFβ1 −509 CC genotype increased the susceptibility to risk of DHF (OR = 2.1, p = 0.028) and significantly higher virus load (p = 0.013). This finding suggests that a combination of CTLA-4 and TGFβ1 polymorphisms is associated with the susceptibility of DHF and higher virus load. |
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| Keywords: | CTLA-4 TGFβ 1 Polymorphisms DHF Virus load |
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