Mouse Slc6a2 (Sodium-dependent noradrenaline transporter) ELISA Kit

Beiging of white adipose tissue (WAT) is a particularly appealing target for therapeutics in the treatment of metabolic diseases through norepinephrine (NE)-mediated signaling pathways. Although previous studies report NE clearance mechanisms via SLC6A2 on sympathetic neurons or proinflammatory macrophages in adipose tissues (ATs), the low catecholamine clearance capacity of SLC6A2 may limit the cleaning efficiency. Here, we report that mouse organic cation transporter 3 (Oct3; Slc22a3) is highly expressed in WAT and displays the greatest uptake rate of NE as a selective non-neural route of NE clearance in white adipocytes, which differs from other known routes such as adjacent neurons or macrophages. We further show that adipocytes express high levels of NE degradation enzymes Maoa, Maob, and Comt, providing the molecular basis on NE clearance by adipocytes together with its reuptake transporter Oct3. Under NE administration, ablation of Oct3 induces higher body temperature, thermogenesis, and lipolysis compared with littermate controls. After prolonged cold challenge, inguinal WAT (ingWAT) in adipose-specific Oct3-deficient mice shows much stronger browning characteristics and significantly elevated expression of thermogenic and mitochondrial biogenesis genes than in littermate controls, and this response involves enhanced beta-adrenergic receptor (beta-AR)/protein kinase A (PKA)/cyclic adenosine monophosphate (cAMP)-responsive element binding protein (Creb) pathway activation. Glycolytic genes are reprogrammed to significantly higher levels to compensate for the loss of ATP production in adipose-specific Oct3 knockout (KO) mice, indicating the fundamental role of glucose metabolism during beiging. Inhibition of beta-AR largely abolishes the higher lipolytic and thermogenic activities in Oct3-deficient ingWAT, indicating the NE overload in the vicinity of adipocytes in Oct3 KO adipocytes. Of note, reduced functional alleles in human OCT3 are also identified to be associated with increased basal metabolic rate (BMR). Collectively, our results demonstrate that Oct3 governs beta-AR activity as a NE recycling transporter in white adipocytes, offering potential therapeutic applications for metabolic disorders.

Objectives: The dopamine (DAT) and norepinephrine (NET) transporters, encoded by SLC6A3 and SLC6A2 genes, regulate neurotransmitters controlling motor activity, attention, mood swings, and stress induced anxiety, thus becoming targets for therapeutic intervention. We explored contribution of SLC6A3 (rs40184, rs2652511) and SLC6A2 (rs3785143, rs11568324) variants in Attention-deficit hyperactivity disorder associated traits. Methods: Nuclear families with ADHD probands (N=200) and ethnically matched controls (N=180) were recruited based on the DSM-IV-TR. Behavioral traits were assessed by the Conners' Parent Rating Scale-revised. Genomic DNA obtained from peripheral blood leukocytes was subjected to PCR based amplification of target sites followed by restriction fragment length polymorphism and sequencing based analysis. Statistical analysis was performed by population as well as family-based methods. Results: The control population showed significant difference in allelic and genotypic frequencies for rs40184, rs2652511 and rs11568324 in comparison to other Asian populations. Family-based analysis exhibited preferential transmission of rs3785143 and rs11568324 "C" alleles (P=0.009 & 0.05). Gene variants showed association with behavioral problems and co-morbid disorders. Multifactor Dimensionality Reduction analysis revealed independent as well as synergistic effects of studied sites and phenotypic traits. Conclusion: Data obtained for the first time evidenced association of dopamine and norepinephrine transporter gene variants with phenotypic traits and co-morbidity of Indian ADHD probands. (C) 2016 Elsevier B.V. All rights reserved.