Abstract
Anxiety disorders (ADs) are a group of mental disorders characterized by feelings of tension, fear, and excessive worrying in the face of life experiences. Aberrant signaling of adenosine A2a receptor (ADORA2A) is believed to be involved in the pathogenesis of ADs. Polymorphisms in the ADORA2A gene were shown to be associated with some of the patterns presented by ADs. The results of these studies have been inconsistent, making it hard to draw definitive conclusions. Therefore, this study performed a systematic review to clarify the associations between ADORA2A gene polymorphisms and ADs susceptibility. PubMed/Medline, Web of Science, and Scopus database using appropriate keywords, then screened for separation of suitable studies based on inclusion/exclusion criteria. Collectively, rs5751876 (1976T>C or previously 1083C>T) and rs35060421 (2592C>Tins) polymorphisms of ADORA2A were associated with an increased susceptibility to ADs. Moreover, rs2298383 TT genotype may be the causal regulatory factor, and ADORA2A T/C (rs2298383/rs3761422) haplotypes have significant susceptibility to ADs development. Additional research is needed to further define the role of ADORA2A gene polymorphisms in the pathogenesis of ADs.
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