Cerebral gene expression in response to single or combined gestational exposure to methylmercury and selenium through the maternal diet

Controversy remains regarding the safety of consuming certain types of seafood, particularly during pregnancy. While seafood is rich in vital nutrients, it may also be an important source of environmental contaminants such as methylmercury (MeHg). Selenium (Se) is one essential element present in seafood, hypothesised to ameliorate MeHg toxicity. The aim of the present study was to ascertain the impact of Se on MeHg-induced cerebral gene expression in a mammalian model. Microarray analysis was performed on brain tissue from 15-day-old mice that had been exposed to MeHg throughout development via the maternal diet. The results from the microarray analysis were validated using qPCR. The exposure groups included: MeHg alone (2.6 mg kg−1), Se alone (1.3 mg kg−1), and MeHg + Se. MeHg was presented in a cysteinate form, and Se as Se–methionine, one of the elemental species occurring naturally in seafood. Eight genes responded to Se exposure alone, five were specific to MeHg, and 63 were regulated under the concurrent exposure of MeHg and Se. Significantly enriched functional classes relating to the immune system and cell adhesion were identified, highlighting potential ameliorating mechanisms of Se on MeHg toxicity. Key developmental genes, such as Wnt3 and Sparcl1, were also identified as putative ameliorative targets. This study, utilising environmentally realistic forms of toxicants, delivered through the natural route of exposure, in association with the power of transcriptomics, highlights significant novel information regarding putative pathways of selenium and MeHg interaction in the mammalian brain

A clinical study on musculoskeletal changes seen in type 2 diabetes mellitus: A single-center study

Background: Type 2 Diabetes mellitus (T2DM) may affect the musculoskeletal (MSK) system in a variety of ways. The impacts can be debilitating enough to impair functional ability and quality of life. MSK complications are the most common endocrine arthropathies which are often under-recognized and poorly treated. This study was done to evaluate the prevalence of MSK complications and its correlation with microvascular complications of T2DM given the paucity of similar studies in India particularly South India. Materials and Methods: A cross-sectional study was conducted on 130 diabetic patients at a tertiary care hospital in Bengaluru. The patient's demographic details, clinical profile including history, general physical examination, systemic examination, and relevant investigations were done to record microvascular complications. A thorough MSK system examination along with imaging of bones and joints was also performed. Results: Out of 130 diabetic patients, 21 patients (16.2%) had MSK complications of which 47.6% (n = 10) of them had carpal tunnel syndrome and 42.8% (n = 9) had frozen shoulder and 9.5% (n = 2) had diabetic amyotrophy. It was also noted that patients who were on oral hypoglycemic agents alone were more likely to develop MSK complications (57.14%) than patients solely on insulin (14.2%). Poor glycemic control, existing microvascular complications, and low high-density lipoprotein were found to be associated with increased risk of MSK complications. Conclusion: The prevalence of MSK complications in T2DM patients is quite significant and is also associated with microvascular complications. Improved glycemic control in T2DM was found to reduce the burden of such complications. Early identification of MSK complications can improve the quality of life in diabetic patients and hence demands proper screening and follow-up