Analyses of LMNA-negative juvenile progeroid cases confirms biallelic POLR3A mutations in Wiedemann–Rautenstrauch-like syndrome and expands the phenotypic spectrum of PYCR1 mutations

Progeroid Syndrome and Mutation in LMNA Gene: Report of Two Cases from Iran

Two Iranian cases with very rare progeroid syndrome are reported. The first is a 24-year-old girl who has been healthy till her 13th birthday. From that time she has been suffering from a progressive generalized and multi-systemic illness. The cardinal clinical findings were growth retardation, subcutaneous fat loss, skin dryness and wrinkling, scattered focal sclerodermoid-like changes, promin...

LMNA mutations in atypical Werner's syndrome.

BACKGROUND Werner's syndrome is a progeroid syndrome caused by mutations at the WRN helicase locus. Some features of this disorder are also present in laminopathies caused by mutant LMNA encoding nuclear lamin A/C. Because of this similarity, we sequenced LMNA in individuals with atypical Werner's syndrome (wild-type WRN). METHODS Of 129 index patients referred to our international registry f...

THE SPECTRUM OF BETA – THALASSEMIA MUTATIONS IN IRAN

Phenotypic diversity in patients with lipodystrophy associated with LMNA mutations.

OBJECTIVE Mutations in LMNA have been linked to diverse disorders called laminopathies, which display heterogeneous phenotypes and include diseases affecting muscles, axonal neurons, progeroid syndromes, and lipodystrophies. Among the lipodystrophies, LMNA mutations have been reported most frequently in patients with familial partial lipodystrophy (FPLD) of the Dunnigan variety; however, phenot...

Novel Dominant-Negative GH Receptor Mutations Expands the Spectrum of GHI and IGF-I Deficiency

Context Autosomal-recessive mutations in the growth hormone receptor (GHR) are the most common causes for primary growth hormone insensitivity (GHI) syndrome with classical GHI phenotypically characterized by severe short stature and marked insulin-like growth factor (IGF)-I deficiency. We report three families with dominant-negative heterozygous mutations in the intracellular domain of the GHR...