Progressive osseous heteroplasia in a Chinese infant and a novel mutation in the GNAS gene

2017 ◽  
Vol 32 (6) ◽  
pp. e209-e211
Author(s):  
S.-D. Zhang ◽  
Z.-l. Xie ◽  
K.-Q. Zhang ◽  
K. NH-Tseung ◽  
J.-J. Zhao
Keyword(s):  
Novel Mutation ◽  
Gnas Gene ◽  
Progressive Osseous Heteroplasia

scholarly journals Identification of a Novel Mutation in a Family with Pseudohypoparathyroidism Type 1a

2018 ◽  
Vol 2018 ◽  
pp. 1-4
Author(s):  
Adelaide Moutinho ◽  
Rosa Carvalho ◽  
Rita Ferreira Reis ◽  
Sandra Tavares
Keyword(s):  
Autosomal Dominant ◽  
Clinical Phenotype ◽  
Novel Mutation ◽  
Target Organ ◽  
Heterozygous Mutation ◽  
Peripheral Blood Leukocytes ◽  
Blood Leukocytes ◽  
The Family ◽  
Gnas Gene ◽  
Gnas Mutation

Introduction. Pseudohypoparathyroidism type 1a is caused by GNAS mutations leading to target organ resistance to multiple hormones rather than parathyroid hormone, resulting not only in hypocalcemia, but also in Albright’s hereditary osteodystrophy phenotype. Materials and Methods. DNA sequencing of the GNAS gene identified a novel heterozygous mutation in peripheral blood leukocytes in the family presented in this case report. Results. We present a case of a 25-year-old woman with pseudohypoparathyroidism type 1a admitted with seizures, whose family presents an autosomal dominant transmission of a novel heterozygous GNAS mutation (c.524_530+3del). Conclusion. Pseudohypoparathyroidism type 1a is mostly caused by inactivating GNAS mutations that have been gradually reported in the literature that lead to a typical and complex clinical phenotype and resistance to multiple hormones. The deletion caused by the mutation identified in the presented case has not been reported previously.

scholarly journals Identification of a Novel Mutation in a Pseudohypoparathyroidism Family

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Zhi-Min Miao ◽  
Can Wang ◽  
Bin-Bin Wang ◽  
Dong-Mei Meng ◽  
Dong-Mei Su ◽  
...  
Keyword(s):  
Novel Mutation ◽  
Clinical Manifestations ◽  
Thyroid Stimulating Hormone ◽  
Functional Study ◽  
Gnas Gene ◽  
Stimulatory G Protein ◽  
Type Ia ◽  
G Protein Alpha Subunit ◽  
Protein Alpha Subunit

Pseudohypoparathyroidism type Ia (PHP Ia) is defined as a series of disorders characterized by multihormone resistance in end-organs and Albright hereditary osteodystrophy (AHO) phenotype. PHP Ia is caused by heterozygous inactivating mutations in GNAS, which encodes the stimulatory G-protein alpha subunit (Gsa). A patient with typical clinical manifestations of pseudohypoparathyroidism (PHP) (round face, short stature, centripetal obesity, brachydactyly, and multi-hormone resistance: parathyroid hormone (PTH), thyroid-stimulating hormone (TSH), and gonadotropins) presented at our center. The sequence of the GNAS gene from the patient and her families revealed a novel missense mutation (Y318H) in the proband and her mother. An in vitro Gsa functional study showed that Gsa function was significantly impaired. These results stress the importance of GNAS gene investigation.

Congenital mirror movements in a family with a novel mutation in the DCC gene

2011 ◽  
Vol 42 (S 01) ◽  
Author(s):  
GC Korenke ◽  
M Wagner ◽  
A Maak ◽  
G Rosenberger ◽  
K Kutsche
Keyword(s):  
Novel Mutation ◽  
Mirror Movements ◽  
Dcc Gene

Danon Disease: Clinical Presentation and Diagnostic Workup in a Case of a Male Patient with a Novel Mutation in the LAMP2 Gene

2016 ◽  
Vol 47 (S 01) ◽  
Author(s):  
A. Dieckmann ◽  
F. Majer ◽  
H. Hulkova ◽  
M. Farr ◽  
T. Kalina ◽  
...  
Keyword(s):  
Male Patient ◽  
Clinical Presentation ◽  
Novel Mutation ◽  
Diagnostic Workup ◽  
Danon Disease ◽  
Lamp2 Gene

A Novel Mutation Glyl672→Arg in Type 2A and a Homozygous Mutation in Type 2B von Willebrand Disease

1996 ◽  
Vol 76 (02) ◽  
pp. 253-257 ◽  
Author(s):  
Takeshi Hagiwara ◽  
Hiroshi Inaba ◽  
Shinichi Yoshida ◽  
Keiko Nagaizumi ◽  
Morio Arai ◽  
...  
Keyword(s):  
Missense Mutation ◽  
Novel Mutation ◽  
Point Mutations ◽  
Japanese Patients ◽  
Von Willebrand Disease ◽  
Homozygous Mutation ◽  
Missense Mutations ◽  
Reaction Products ◽  
Type 3 ◽  
Von Willebrand

SummaryGenetic materials from 16 unrelated Japanese patients with von Willebrand disease (vWD) were analyzed for mutations. Exon 28 of the von Willebrand factor (vWF) gene, where point mutations have been found most frequent, was screened by various restriction-enzyme analyses. Six patients were observed to have abnormal restriction patterns. By sequence analyses of the polymerase chain-reaction products, we identified a homozygous R1308C missense mutation in a patient with type 2B vWD; R1597W, R1597Q, G1609R and G1672R missense mutations in five patients with type 2A; and a G1659ter nonsense mutation in a patient with type 3 vWD. The G1672R was a novel missense mutation of the carboxyl-terminal end of the A2 domain. In addition, we detected an A/C polymorphism at nucleotide 4915 with HaeIII. There was no particular linkage disequilibrium of the A/C polymorphism, either with the G/A polymorphism at nucleotide 4391 detected with Hphl or with the C/T at 4891 detected with BstEll.

Characterization of the Original Christmas Disease Mutation (Cysteine 206 → Serine): From Clinical Recognition to Molecular Pathogenesis

1992 ◽  
Vol 67 (01) ◽  
pp. 063-065 ◽  
Author(s):  
Sherryl A M Taylor ◽  
Jacalyn Duffin ◽  
Cherie Cameron ◽  
Jerome Teitel ◽  
Bernadette Garvey ◽  
...  
Keyword(s):  
Nucleotide Substitution ◽  
Novel Mutation ◽  
Factor Ix ◽  
Causative Mutation ◽  
Coding Region ◽  
Body Of Knowledge ◽  
Polymerase Chain ◽  
Splice Junctions

SummaryChristmas disease was first reported as a distinct clinical entity in two manuscripts published in 1952 (1, 2). The eponym associated with this disorder, is the surname of the first patient examined in detail and reported by Biggs and colleagues in a paper describing the clinical and laboratory features of seven affected individuals (3). This patient has severe factor IX coagulant deficiency (less than 0.01 units/ml) and no detectable circulating factor IX antigen (less than 0.01 units/ml). Coding sequence and splice junctions of the factor IX gene from this patient have been amplified in vitro through the polymerase chain reaction (PCR). One nucleotide substitution was identified at nucleotide 30,070 where a guanine was replaced by a cytosine. This mutation alters the amino acid encoded at position 206 in the factor IX protein from cysteine to serine. The non conservative nature of this substitution, the absence of this change in more than 200 previously sequenced factor IX genes and the fact that the remainder of the coding region of this gene was normal, all provide strong circumstantial evidence in favour of this change being the causative mutation in this patient. The molecular characterization of this novel mutation in the index case of Christmas disease, contributes to the rapidly expanding body of knowledge pertaining to Christmas disease pathogenesis.

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