Anti-ACSM3 (aa 354-402) polyclonal antibody

Background: In ulcerative colitis (UC) butyrate metabolism is impaired due to a defect in the butyrate oxidation pathway and/or transport. In the present study we correlated butyrate uptake and oxidation to the gene expression of the butyrate transporter SLC16A1 and the enzymes involved in butyrate oxidation (ACSM3, ACADS, ECHS1, HSD17B10, and ACAT2) in UC and controls. Methods: Colonic mucosal biopsies were collected during endoscopy of 88 UC patients and 20 controls with normal colonoscopy. Butyrate uptake and oxidation was measured by incubating biopsies with 14C-labeled Na-butyrate. To assess gene expression, total RNA from biopsies was used for quantitative reverse-transcription polymerase chain reaction (qRT-PCR). In 20 UC patients, gene expression was reassessed after treatment with infliximab. Results: Butyrate uptake and oxidation were significantly decreased in UC versus controls (P < 0.001 for both). Butyrate oxidation remained significantly reduced in UC after correction for butyrate uptake (P < 0.001), suggesting that the butyrate oxidation pathway itself is also affected. Also, the mucosal gene expression of SLC16A1, ACSM3, ACADS, ECHS1, HSD17B10, and ACAT2 was significantly decreased in UC as compared with controls (P < 0.001 for all). In a subgroup of patients (n = 20), the gene expression was reassessed after infliximab therapy. In responders to therapy, a significant increase in gene expression was observed. Nevertheless, only ACSM3 mRNA levels returned to control values after therapy in the responders groups. Conclusions: The deficiency in the colonic butyrate metabolism in UC is initiated at the gene expression level and is the result of a decreased expression of SLC16A1 and enzymes in the beta-oxidation pathway of butyrate. (Inflamm Bowel Dis 2012;)

The Wistar Audiogenic Rat (WAR) is a model whose rats are predisposed to develop seizures following acoustic stimulation. We aimed to establish the transcriptional profile of the WAR model, searching for genes that help in understanding the molecular mechanisms involved in the predisposition and seizures expression of this strain. RNA-Seq of the corpora quadrigemina of WAR and Wistar rats subjected to acoustic stimulation revealed 64 genes differentially regulated in WAR. We validated twelve of these genes by qPCR in stimulated and naive (non stimulated) WAR and Wistar rats. Among these, Acsm3 was upregulated in WAR in comparison with both control groups. In contrast, Gpr126 and Rteli were downregulated in naive and stimulated WAR rats in comparison with the Wistar controls. Qdpr was upregulated only in stimulated WAR rats that exhibited audiogenic seizures. Our data show that there are genes with differential intrinsic regulation in the WAR model and that seizures can alter gene regulation. We identified new genes that might be involved in the epileptic phenotype and comorbidities of the WAR model.