Mouse Anti Human Rarres2 Hybridoma [DQUD-Sbssft3-5D5]

Background: Chemerin, encoded by the retinoic acid receptor responder 2 (RARRES2) gene is an adipocytesecreted protein with autocrine/paracrine functions in adipose tissue, metabolism and inflammation with a recently described function in vascular tone regulation, liver, steatosis, etc. This molecule is believed to represent a critical endocrine signal linking obesity to diabetes. There are no data available regarding evolution of RARRES2 in non-human primates and great apes. Expression profile and orthology in RARRES2 genes are unknown aspects in the biology of this multigene family in primates. Thus; we attempt to describe expression profile and phylogenetic relationship as complementary knowledge in the function of this gene in primates. To do that, we performed A RT-PCR from different tissues obtained during necropsies. Also we tested the hypotheses of positive evolution, purifying selection, and neutrality. And finally a phylogenetic analysis was made between primates RARRES2 protein. Results: RARRES2 transcripts were present in liver, lung, adipose tissue, ovary, pancreas, heart, hypothalamus and pituitary tissues. Expression in kidney and leukocytes were not detectable in either species. It was determined that the studied genes are orthologous. Conclusions: RARRES2 evolution fits the hypothesis of purifying selection. Expression profiles of the RARRES2 gene are similar in baboons and chimpanzees and are also phylogenetically related.

Chemerin is an adipose tissue mediator involved in the regulation of many processes, including lipogenesis, inflammatory responses, etc. The role of chemerin in the development of insulin resistance still needs better understanding. The aim of the study was to investigate chemerin production in obese patients with different states of carbohydrate metabolism. The study included 155 patients with diagnosed obesity and 34 patients with overweight. The control group 1 consisted of 43 conditionally healthy donors without obesity. For comparison of the research data on evaluation of tissue-specific mRNA expression of the genes IL-6, TNF-alpha, RARRES2, (encoding IL-6, TNF-alpha, and chemerin, respectively) control group 2 consisting of 30 non-obese was also included into this study. The relative level of mRNA expression of the genes IL-6, TNF-alpha and RARRES2 (encoding IL-6, TNF-alpha and chemerin, respectively) was carried out using real time PCR. Concentrations of IL-6, TNF-alpha, and chemerin were measured in serum/plasma using an enzyme-linked immunosorbent assay (ELISA). Significant differences were found in the plasma level of chemerin and tissue-specific patterns of RARRES2 gene expression in obese patients; these changes depended on the degree of obesity and the state of carbohydrate metabolism. Opposite associations between RARRES2 gene expression and expression TNF-alpha and IL-6 genes have been recognized in adipose tissues of different localization: in obese patients (BMI <= 40 kg/m(2)) without type 2 diabetes mellitus (DM2) they were negative, while in obese patients with DM2 diabetes they were positive. The recognized correlations between the plasma content of chemerin and the expression level of its gene in biopsies with various parameters of carbohydrate and lipid metabolism, and proinflammatory molecules indicate chemerin involvement in metabolic and immune processes in obesity.