Anti-PON2 (aa 93-103) polyclonal antibody

Purpose: The metabolic syndrome (MetS) is a constellation of interrelated risk factors of metabolic origin that appear to promote development of cardiovascular disease. It has become one of the most important topics for this decade because of marked increase in cardiovascular disease associated with risk factors. Paraoxonase (PON) is a family of three enzymes, PON1, PON2 and PON3, the gene which is located on chromosome 7. This is high-density lipoprotein (HDL)-associated enzyme with antioxidant activity. The objective of the present study aimed at measurement of PON1 activities in patients with MetS, to compare PON1 activities in patients with MetS with those in controls and assess its relationship with the lipoproteins in serum. Material and Method: Cases were included as per the criteria put forth by the International Diabetes Federation. Serum PON1 activities were measured using spectrophotometer. Statistical analysis was done using SPSS 20.0. Result: Serum PON1 arylesterase and lactonase activities were found to be reduced significantly in patients with MetS than in controls. PON1 activities showed a positive correlation with HDL, fasting blood glucose and diastolic blood pressure. Linear regression analysis showed a significant correlation between PON1 activities and body mass index. Discussion: From the present study, it is clear that reduction in PON1 activities in MetS is mainly due either to abnormalities with synthesis or secretion of HDL cholesterol or oxidative stress as a consequence of excess production of the free radicals. This study also iterates that it is the quality and not the quantity of HDL cholesterol is important while studying the pathophysiology of MetS.

Objective. - Oxidative stress has been reported to be associated with various pregnancy complications and to play key roles in many of them. An inadequate level of antioxidant defense may eventually lead to an early pregnancy loss. There is a lack of information about the roles of the PON2 and PON3 enzymes in the etiology of the cases of unexplained recurrent abortus. The aim of our study is to determine and present the data regarding the roles of these enzymes for the first time. Materials and methods. - We measured the transcriptional levels of the PON2 and PON3 enzymes in the curettage materials obtained from the patients with unexplained recurrent abortus (n = 25) and compared the results with those measured in the abortus materials from healthy pregnant women (n = 50) who had undergone a voluntary abortion. The transcriptional activities of PON2 and PON3 enzymes were measured through quantification of their respective mRNAs by RT-qPCR assay. For each gene, 2 (Delta Ct)replication values of the control and the patient groups were compared using the Student's t-test, and the p values were calculated thereafter. Fold-changes in the enzyme transcription levels were interpreted as up- or down-regulation. Results. - PON2 mRNA expressions were found to be highly decreased in the patient group (p = 0.000002). PON3 transcription, when compared to the healthy pregnant women, was found to be down-regulated in the patient group; however, the difference was not statistically significant (p = 0.69). Conclusions. - In this study, we evaluated the expressional regulation of the PON2 and PON3 enzymes in unexplained recurrent abortus. Our results demonstrate for the first time that the expressions of PON2 and PON3 are down-regulated in the abortion specimens of the patients with recurrent miscarriage. Although both enzymes had low expression levels, the decrease in the transcriptional activity of PON2 revealed a high statistical significance. According to these results, it is rational to speculate that PON2 may be a novel therapeutic agent in the management of the cases with unexplained recurrent abortion. (C) 2018 Elsevier Masson SAS. All rights reserved.