Endocrine Abstracts

Calcium and Vitamin D deficiency is a common cause of falls and fracture and supplementation with 1 g of calcium and 800 IU of vitamin D is commonly recommended.However, the serum level of 25 OHD that defines deficiency is controversial, and the 25 OHD level required to normalise serum parathyroid hormone (PTH)-in the presence of normal calcium- is often used. In this study we set out to explore how effective is 1 g of calcium and 800 IU of vitamin D in ...

Aims: Genetic variations mediating matrix metalloproteinase-2 (MMP-2) expression may result in individual differences in susceptibility to particular diseases. Our aim was to investigate the possible association of certain MMP-2 gene variants with type 2 diabetes mellitus (T2DM) in a Tunisian population.Subjects and Methods: A case-control study involving 310 normoglycemic control subjects and 791 T2D patients was performed. A total of four MMP-2 SNPs (-...

Variants of ADIPOQ have been inconsistently associated with adiponectin level in diverse populations. We explored association of single nucleotide polymorphism (SNP) in the ADIPOQ (+276 G>T, rs1501299) with circulating total adiponectin and insulin resistance (IR) in Ukrainian T2DM cohort.Materials and methods: 544 T2DM patients (M/F: 241/303, age 56.3±0.4 years, diabetes duration 7.8±1.0 years, BMI 31.7&...

Steroid sulphatase (STS) liberates sulphated oestrogens into their active forms. In the colon, evidence suggests that although initially pro-apoptotic in healthy mucosa, once malignancy occurs, oestrogens may stimulate colorectal cancer (CRC) proliferation. Moreover, greater intratumoural oestrogen synthesis is negatively associated with survival outcomes in CRC patients. However, little is known about oestrogen metabolism pathways in CRC, and whether alterations in local oest...

Colorectal cancer (CRC) is the third most common cancer worldwide with incidence expected to rise. Although not traditionally viewed as a hormonal cancer, evidence suggests peripheral synthesis of active oestrogens worsens prognosis. Oestrogen metabolising enzymes include steroid sulphatase (STS), which desulphates oestrogens into their active forms, and 17β-hydroxysteroid dehydrogenases (17βHSD), which are estrogen oxidoreductase enzymes. We have previously shown ST...

Aim: Egypt is among the world’s top 10 countries in terms of the highest number of people with diabetes. Charcot foot is a serious complication that affect bones, joints, and soft tissues of the foot or ankle. Although the etiology is linked to different inflammatory markers, yet not clear. Recently, an association between two polymorphisms (1181G > C and 245T > G) of the osteoprotegerin (OPG) gene and Charcot was suggested. The aim of this study was to explore p...

Introduction: Follicle-stimulating hormone (FSH) is a glycoprotein that support reproduction by regulating ovarian follicular growth and development. Recent studies demonstrated that proliferative signals mediating folliculogenesis are mediated by the G protein-coupled estrogen receptor (GPER) expressed in ovarian tissues throughout the follicular phase. In granulosa cells, GPER forms heteromers with FSHR, reprogramming cAMP-induced death signals to AKT-dependent, anti-apoptot...

During the menstrual cycle, selection of the dominant follicle is characterized by changes of gonadotropin and steroid hormone receptor expression. We aim to evaluate whether co-existing follicle-stimulating hormone receptor (FSHR) and G protein-coupled estrogen receptor (GPER) form heterodimers, suggesting their role in ovarian follicle selection. FSHR-GPER dimerization was evaluated in transfected HEK293 cells in vitro by bioluminescence resonance energy transfer (B...

Introduction: The developmental stages of the ovarian follicle are characterized by changes of gonadotropin and steroid hormone receptor expression and their potential interactions on the surface of granulosa cells. In this study in vitro, we aim to evaluate whether the co-existing follicle-stimulating hormone receptor (FSHR) and G protein-coupled estrogen receptor (GPER) form heteromers, which may play role in selecting the dominant ovarian follicle.<p class="abs...

The anorectic gut hormones glucagon-like peptide-1 (GLP-1) and Peptide YY (PYY) are secreted by enteroendocrine L cells in response to short chain fatty acids (SCFAs) produced by gut microbiota following dietary fibre consumption. SCFAs, acetate, propionate and butyrate, activate the G protein-coupled receptors Free Fatty Acid Receptor 2 and 3 (FFAR2, FFAR3). Increasing intestinal levels of propionate can prevent weight gain in overweight adults. In rodents, FFAR2-mediated gut...