Anti-ADORA2A monoclonal antibody (CABT-L1968)


Host Species
Antibody Isotype
Species Reactivity
E. Coli derived recombinant protein, representing aa 290-412 of the human adenosine A2A receptor


Alternative Names
ADORA2A; adenosine A2a receptor; A2aR; RDC8; ADORA2; adenosine receptor A2a
Entrez Gene ID
UniProt ID

Product Background

Activation of TRKA receptors; Adenosine P1 receptors; Alcoholism; Calcium signaling pathway; Class A/1 (Rhodopsin-like receptors); Defective ACTH causes Obesity and Pro-opiomelanocortinin deficiency (POMCD); Disease; G alpha (s) signalling events;


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Association between ADORA2A and DRD2 polymorphisms and caffeine-induced anxiety


Authors: Childs, Emma; Hohoff, Christa; Deckert, Juergen; Xu, Ke; Badner, Judith; de Wit, Harriet

Caffeine produces mild psychostimulant and sometimes anxiogenic effects by antagonizing adenosine at A(1) and A(2A) receptors, and perhaps through interactions with other transmitter systems. Adenosine receptors are colocalized and functionally interact with dopamine receptors in the brain. Thus, functional polymorphisms in the genes for either adenosine or dopamine receptors may affect responses to caffeine. In this study, we examined associations between self-reported anxiogenic effects of caffeine and variation in the genes for A(2A) (ADORA2A) and DRD2 (DRD2) receptors. Healthy male and female individuals (n = 102), who consumed less than 300 mg caffeine per week, ingested capsules containing 0, 50, 150, and 450 mg caffeine under double-blind conditions in four separate experimental sessions. Subjective anxiety was measured before and at repeated times after capsules were consumed. At the 150 mg dose of caffeine, we found a significant association between caffeine-induced anxiety ( Visual Analog Scales, VAS) and ADORA2A rs5751876 (1976C/T), rs2298383 (intron 1a) and rs4822492 (3'-flank), and DRD2 rs1110976 (intron 6). Caffeine-induced anxiety (VAS) was also associated with two-loci interactions of selected ADORA2A and DRD2 polymorphisms. The lowest dose of caffeine did not increase ratings of anxiety while the highest dose increased anxiety in the majority of subjects. These findings provide support for an association between an ADORA2A polymorphism and self-reported anxiety after a moderate dose of caffeine. It is likely that other ADORA2A and DRD2 polymorphisms also contribute to responses to caffeine.

Impact of Genetic Variability on Physiological Responses to Caffeine in Humans: A Systematic Review


Authors: Fulton, Jacob L.; Dinas, Petros C.; Carrillo, Andres E.; Edsall, Jason R.; Ryan, Emily J.; Ryan, Edward J.

Emerging research has demonstrated that genetic variation may impact physiological responses to caffeine consumption. The purpose of the present review was to systematically recognize how select single nucleotide polymorphisms (SNPs) impact habitual use of caffeine as well as the ergogenic and anxiogenic consequences of caffeine. Two databases (PubMed and EBSCO) were independently searched using the same algorithm. Selected studies involved human participants and met at least one of the following inclusion criteria: (a) genetic analysis of individuals who habitually consume caffeine; (b) genetic analysis of individuals who underwent measurements of physical performance with the consumption of caffeine; (c) genetic analysis of individuals who underwent measurements of mood with the consumption of caffeine. We included 26 studies (10 randomized controlled trials, five controlled trials, seven cross-sectional studies, three single-group interventional studies and one case-control study). Single nucleotide polymorphisms in or near the cytochrome P450 (CYP1A2) and aryl hydrocarbon receptor (AHR) genes were consistently associated with caffeine consumption. Several studies demonstrated that the anxiogenic consequences of caffeine differed across adenosine 2a receptor (ADORA2A) genotypes, and the studies that investigated the effects of genetic variation on the ergogenic benefit of caffeine reported equivocal findings (CYP1A2) or warrant replication (ADORA2A).

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