Rabbit Anti-DRD1 monoclonal antibody, clone KN21-04

Background. Several studies indicated that antipsychotic treatment response and side effect manifestation can be different due to inter-individual variability in genetic variations. Aim of the study. Here we perform a case-control study to explore a potential association between schizophrenia and variants within the antipsychotic drug molecular targets (DRD1, DRD2, DRD3, HTR2A, HTR6) and metabolizing enzymes (CYP2D6, COMT) genes in Armenian population including also analysis of their possible relationship with disease clinical symptoms. Methods. A total of 18 SNPs was studied in patients with schizophrenia (n = 78) and healthy control subjects (n = 77) using MassARRAY genotyping. Results: We found that two studied genetic variants, namely DRD2 rs4436578*C and HTR2A rs6314*A are underrepresented in the group of patients compared to healthy subjects. After the correction for multiple testing, the rs4436578*C variant remained significant while the rs6314*A reported borderline significance. No significant differences in minor allele frequencies for other studied variants were identified. Also, a relationship between the genotypes and age of onset as well as disease duration has been detected. Conclusions. The DRD2 rs4436578*C genetic variant might have protective role against schizophrenia, at least in Armenians. (C) 2019 IMSS. Published by Elsevier Inc.

DNA demethylation in Arabidopsis (Arabidopsis thaliana) is mediated by DNA glycosylases of the DEMETER family. Three DEMETER-LIKE (DML) proteins, REPRESSOR OF SILENCING1 (ROS1), DML2, and DML3, function to protect genes from potentially deleterious methylation. In Arabidopsis, much of the DNA methylation is directed by RNA interference (RNAi) pathways and used to defend the genome from transposable elements and their remnants, repetitive sequences. Here, we investigated the relationship between DML demethylation and RNAi-mediated DNA methylation. We found that genic regions demethylated by DML enzymes are enriched for small interfering RNAs and generally contain sequence repeats, transposons, or both. The most common class of small interfering RNAs was 24 nucleotides long, suggesting a role for an RNAi pathway that depends on RNA-DEPENDENT RNA POLYMERASE2 (RDR2). We show that ROS1 removes methylation that has multiple, independent origins, including de novo methylation directed by RDR2-dependent and -independent RNAi pathways. Interestingly, in rdr2 and drm2 mutant plants, we found that genes demethylated by ROS1 accumulate CG methylation, and we propose that this hypermethylation is due to the ROS1 down-regulation that occurs in these mutant backgrounds. Our observations support the hypothesis that DNA demethylation by DML enzymes is one mechanism by which Arabidopsis genes are protected from genome defense pathways.