ESPE Abstracts

Background: Rare genetic causes of obesity include variants in genes within the melanocortin-4 receptor (MC4R) pathway, a principal regulator of energy balance. Weight and hunger reductions following treatment with the MC4R agonist setmelanotide have been demonstrated in patients with obesity due to variants in multiple genes, including POMC, LEPR, SRC1, and SH2B1. We describe a trial design of setmelanotide in patients with addition...

The coronavirus disease (COVID-19) pandemic brought with it a state of alarm as of March 14, 2020, which implied a restriction on the mobility of the general population and home confinement. One of the main concerns raised by isolation was the substantial reduction in energy expenditure due to children spending more time sitting or participating in activities that involve very low rates of energy expenditure, such as watching television, managing the different networks social ...

Objective: Vitamin deficient (VDD) rickets can manifest with skeletal (hypocalcemia, hypophosphatemia, elevated serum alkaline phosphatase and defective bone mineralization) and extra-skeletal findings. There are certain number of case reports and limited number of small scale studies reporting dilated cardiomyopathy due to VDD rickets.The aim of the present study is to evaluate the clinical, biochemical and echocardiographic features of...

Background: Hereditary vitamin D-resistant rickets (HVDRR) is a rare disease caused by mutations in vitamin d receptor (VDR). Patients with HVDRR are usually treated with intravenous calcium (i.v.-Ca) therapy via a central catheter. However, central catheter-related complications can cause important morbidity. In this report, we described four patients with HVDRR from different families. In three of these cases we used a novel therapeutic regime of intermittent IV-Ca ...

Background: Parathyroid Hormone (PTH), a key regulator of calcium and phosphorus homeostasis through its effect on bone, kidney, and intestine. The serum concentration of PTH is derived both from the release of PTH stored in secretory granules and from de novo synthesis of PTH in response to alterations in the serum levels of calcium, phosphorus, and vitamin D. Magnesium has a potent role in secretion of PTH, while alkaline phosphatase appears to be important ...

Background: The CYP27B1 gene encodes 25-hydroxyvitamin D-1α-hydroxylase. Mutations of this gene cause a rare autosomal recessive disorder, vitamin D-dependent rickets type 1A.Objective and hypotheses: To investigate CYP27B1 mutations in children when rickets was associated with normal or high vitamin D levels and low or inappropriately normal calcitriol levels.Method: All coding exons and intron-exon boundari...

Hereditary vitamin D-resistant rickets (HVDRR) is an autosomal recessive disorder characterized by end organ resistance to 1α,25-dihydroxyvitamin D3 (1,25D3). The syndrome is recognized by severe early onset rickets with bowing of the lower extremities, short stature, often alopecia and severe hypocalcemia.Objectives: To study the effectiveness of our designed protocol of continuous high dose intracaval calcium infusion for the tre...

Introduction: Vitamin D resistant rickets type II (VDDR-II) is a disease with a difficult treatment developed as a result of mutations in VDR gene. Despite high dose active vitamin D and oral calcium treatments, sufficient recovery cannot be achieved mostly. Successful results with intravenous calcium infusion that is an alternative treatment have been reported; however, serious restrictions and complications such as hospitalization, catheter infection, thrombosis, skin necros...

Background & Aim: Vitamin D-dependent rickets type 1 A (VDDR1A) is an autosomal recessive condition caused by mutation in CYP27B1, which encodes 1 α-hydroxylase enzyme that catalyzes the conversion of 25-hydroxyvitamin D (25OHD) to 1,25-dihydroxyvitamin D (1,25 (OH)2D). We are reporting 4 cases of VDDR1A due to CYP27B1 mutation initially misdiagnosed as vitamin D deficient and hypophosphatemic rickets.<p class="abstext...

Background: CYP27B1 converts 25-hydroxyvitamin D3 to active 1,25-dihydroxyvitamin D3, playing a vital role in calcium homeostasis and bone growth. Vitamin D-dependent rickets type 1 (VDDR-1) is a rare autosomal recessive disorder caused by mutations in CYP27B1.Objective and hypotheses: Enzymatic and structural analysis of mutations in a patient with calcipenic rickets.Method: Two siblings presented with calcip...