5 torthaí
Heterozygous missense mutations in the serine-threonine kinase receptor BMPR1B result typically in brachydactyly type A2 (BDA2), whereas mutations in the corresponding ligand GDF5 cause brachydactyly type C (BDC). Mutations in the GDF inhibitor Noggin (NOG) or activating mutations in GDF5 cause
We used whole-exome sequencing to study three individuals with a distinct condition characterized by short stature, chondrodysplasia with brachydactyly, congenital joint dislocations, cleft palate, and facial dysmorphism. Affected individuals carried homozygous missense mutations in IMPAD1, the gene
OBJECTIVE
To investigate the clinical features, mutation of the GNAS1 and pathogenesis of progressive osseous heteroplasia (POH).
METHODS
The typical clinical, pathological and radiographic features of a boy with POH were collected and summarized following family survey. The GNAS1 gene sequence of
Three cases of pseudohypoparathyroidism with roentgenographic evidence of hyperparathyroid bone disease are described. Renal resistance to exogenous parathyroid hormone (PTH), the hallmark of pseudohypoparathyroidism, was documented by markedly blunted or absent urinary phosphate and cyclic AMP
Three different pathophysiological mechanisms are probably responsible for hereditary pseudohypoparathyroidism: 1) a defect at the prereceptor-level, 2) a defective membrane N-protein accounting for diminished second messenger production, and 3) a defect in the cytosolic response to the hormone. In