Rabbit Anti-Human ADRA2A Polyclonal Antibody

The purpose of our study was to test the hypothesis that prenatal tobacco smoking exposure (PSE) could modulate the association of genetic variants with ADHD. A community based case-control study was conducted among Chinese children and 168 ADHD patients and 233 controls were recruited by using combination diagnosis of DSM-IV, SNAP-IV and semi-structured clinical interview. Logistic regression analysis was performed to estimate the effect of prenatal tobacco smoking exposure and genotype frequencies on ADHD susceptibility individually by adjustment for potential confounders. Multiplicative and additive interaction analysis were performed to evaluate the interactions between risk genes and PSE with regard to ADHD. Prenatal tobacco smoke exposure was a significant risk factor of ADHD even after adjusted for other potential confounders. ADRA2A rs553668, DRD2 rs1124491 and SLC6A4 rs6354 were identified to be associated with ADHD. A significant multiplicative and additive gene-environment interactions were observed between the PSE and the ADRA2A rs553668 in relation to ADHD and ADHD-ODD. The risk of the genetic variants in ADHD was increased significantly if the child had prenatal tobacco exposure. The genetic risk for ADHD could be influenced by the presence of environmental risks. The environmental and the genetic risks are not distinct to each other. More geneenvironment interaction studies were needed to reveal the etiology of ADHD.

Objectives. The objective of the current study was to examine the potential impact of a C --> G substitution at position -1291 Of the alpha(2A)-adrenergic receptor gene (ADRA2A) promoter on obesity and estimates of insulin, glucose, and lipid metabolism as well as circulating hormones, including salivary cortisol in 284 unrelated Swedish men born in 1944. Main outcome measures. The subjects were genotyped by using PCR amplification of the promoter region of the ADRA2A gene followed by digestion with the restriction enzyme Mspl. Results. The frequencies were 0.23 for allele C and 0.77 for allele G. The observed genotype frequencies were 45.8 and 54.2% for C/G and G/G, respectively. Heterozygotes (n = 121) had significantly (P = 0.009) higher salivary cortisol levels after 0.5 mg dexamethasone compared with G/G homozygotes (n = 143). Fasting glucose was found to be significantly (P = 0.017) higher in heterozygotes than in G/G homozygotes. The latter group had also a borderline significantly (P = 0.080) higher mean diastolic blood pressure. These results were all adjusted for the potential confounding effect of body mass index (BMI) and waist-to-hip ratio (WHR.). Other measurements such as BMI, WHR, abdominal sagittal diameter, total testosterone, insulin-like growth factor 1, serum leptin, fasting insulin and serum lipids were not different across the ADRA2A genotype groups. Conclusions. In conclusion, we have shown that an C --> G polymorphism at position -1291 of the ADRA2A gene is associated with a subnormal cortisol response to dexamethasone, elevated glucose levels and perhaps increased diastolic blood pressure. The pathophysiology could involve an altered density Of the alpha(2A)-AR that destabilizes the sympathetic-hypothalamic-pituitary-adrenal systems in those with genetic vulnerability in the alpha(2A)-adrenergic receptor gene promoter.