ESPE Abstracts

Background: Since the first description of inactivating PTH/PTHrP signaling disorders [(iPPSD, former pseudohypoparathyroidism (PHP)] a remarkable clinical variability was observed, apparently age-dependent. The main clinical features, including PTH resistance, brachydactyly and short stature, develop during middle and late childhood. Hearing loss (HL) is commonly found in iPPSD/PHP. Only a few studies approached the subject of hearing loss in iPPSD/PHP and th...

Background: Hypophosphatasia (HPP) is an inherited multisystem disorder predominantly affecting the mineralization of bones and teeth. HPP is caused by pathogenic variants in ALPL, which encodes tissue non-specific alkaline phosphatase. A major challenge in diagnosing HPP is interpreting variants in ALPL classified as variants of uncertain significance (VUS) according to ACMG/AMP criteria, creating uncertainty in patients and treating physicians resulting in d...

Background/aim: Hyperparathyroidism (HPHT) is a common feature in patients with X-linked hypophosphatemia (XLH) especially when treated with vitamin D analogues and phosphate supplements. Although the exact mechanism is not clear, it is assumed that phosphate supplements taken chronically stimulate parathyroid hormone (PTH) secretion. We prospectively assessed the effect of a novel pathogenetic treatment anti-FGF23 (burosumab) on PTH levels in children with XL...

Purpose: X-linked hypophosphatemia (XLH) is the most common hereditary cause of hypophosphatemic rickets. Elevated circulating levels of fibroblast growth factor 23 (FGF23) caused by mutations in the PHEX gene lead to renal phosphate wasting and rickets. Conventional treatment with phosphate salts and active vitamin D is associated with nephrocalcinosis in XLH patients. Mice on a high phosphate diet develop proximal tubular injury. Detailed analysis on kidney ...

Key words: KBG syndrome, ANKRD11, zebrafish, CRISPR/CasRx, Wnt signaling pathwayBackground: KBG syndrome (KBGS) is a rare condition caused by variant in ANKRD11 gene, which is characterized by intellectual disability, distinctive facial features, macrodontia of the upper central incisors, skeletal anomalies and short stature. Patients carrying loss-of-function ANKRD11 variants exhibit short stature due to defects of bone develop...

Introduction: Human breast milk (HBM) contains various components with critical roles in supporting early human growth and development. HBM is highly enriched in miRNAs, short, non-coding RNAs of 18 to 25 nucleotides in length, involved in the development, differentiation, proliferation, metabolism, and death of cells and tissues. miRNAs have been linked to growth control, apoptosis, epigenetic modifications, developmental programming, stem cell differentiatio...