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Anaïs Fradet, Jamie Fitzgerald
The INPPL1 (inositol polyphosphate phosphatase-like 1) gene encodes the inositol phosphatase, SHIP2 (for src homology 2 domain-containing inositol phosphatase 2). SHIP2 functions to dephosphorylate, and negatively regulate, the lipid second messenger phosphatidylinositol (3,4,5)P3. SHIP2 has been well studied in the area of insulin resistance and obesity but has roles in cancer and other disorders. Recently, it was reported that mutations in INPPL1 cause opsismodysplasia, a rare, autosomal recessive severe skeletal dysplasia...
October 6, 2016: Journal of Human Genetics
Cori Feist, Paul Holden, Jamie Fitzgerald
This study aimed to identify the genetic basis of a severe skeletal lethal dysplasia. The main clinical features of two affected fetuses included short limbs with flared metaphyses, bowed radii, femora and tibiae, irregular ossification of hands and feet, and marked platyspondyly. Affected and nonaffected family members were subjected to whole-exome sequencing, followed by immunoblot analysis on amniocytes isolated from one of the affected individuals. Unique compound heterozygous variants in the inositol polyphosphate phosphatase-like 1 (INPPL1) gene encoding the SHIP2 protein were identified in both affected individuals...
October 2016: Clinical Dysmorphology
Ansab Khwaja, Shawn E Parnell, Kathryn Ness, Viviana Bompadre, Klane K White
UNLABELLED: We present two siblings affected with opsismodysplasia (OPS), a rare skeletal dysplasia caused by mutations in the inositol polyphosphate phosphatase-like 1 gene. The skeletal findings include short stature with postnatal onset micromelia, marked platyspondyly, squared metacarpals, delayed skeletal ossification, metaphyseal cupping, and postnatal micromelia. Respiratory compromise, delayed ambulation, and progressive lower extremity deformities are described. The severity of findings is variable...
2015: Frontiers in Pediatrics
William's Elong Edimo, Stéphane Schurmans, Pierre P Roger, Christophe Erneux
Phosphoinositide 5-phosphatases are critical enzymes in modulating the concentrations of PI(3,4,5)P3, PI(4,5)P2 and PI(3,5)P2. The SH2 domain containing inositol 5-phosphatases SHIP1 and SHIP2 belong to this family of enzymes that dephosphorylate the 5 position of PI(3,4,5)P3 to produce PI(3,4)P2. Data obtained in zebrafish and in mice have shown that SHIP2 is critical in development and growth. Exome sequencing identifies mutations in the coding region of SHIP2 as a cause of opsismodysplasia, a severe but rare chondrodysplasia in human...
January 2014: Advances in Biological Regulation
Aritoshi Iida, Nobuhiko Okamoto, Noriko Miyake, Gen Nishimura, Satoshi Minami, Takuya Sugimoto, Mitsuko Nakashima, Yoshinori Tsurusaki, Hirotomo Saitsu, Masaaki Shiina, Kazuhiro Ogata, Shigehiko Watanabe, Hirofumi Ohashi, Naomichi Matsumoto, Shiro Ikegawa
Opsismodysplasia is an autosomal recessive skeletal disorder characterized by facial dysmorphism, micromelia, platyspondyly and retarded bone maturation. Recently, mutations in the gene encoding inositol polyphosphate phosphatase-like 1 (INPPL1) are found in several families with opsismodysplasia by a homozygosity mapping, followed by whole genome sequencing. We performed an exome sequencing in two unrelated Japanese families with opsismodysplasia and identified a novel INPPL1 mutation, c.1960_1962delGAG, in one family...
June 2013: Journal of Human Genetics
E C C Chai, R R Singaraja
No abstract text is available yet for this article.
June 2013: Clinical Genetics
Céline Huber, Eissa Ali Faqeih, Deborah Bartholdi, Christine Bole-Feysot, Zvi Borochowitz, Denise P Cavalcanti, Amandine Frigo, Patrick Nitschke, Joelle Roume, Heloísa G Santos, Stavit A Shalev, Andrea Superti-Furga, Anne-Lise Delezoide, Martine Le Merrer, Arnold Munnich, Valérie Cormier-Daire
Opsismodysplasia (OPS) is a severe autosomal-recessive chondrodysplasia characterized by pre- and postnatal micromelia with extremely short hands and feet. The main radiological features are severe platyspondyly, squared metacarpals, delayed skeletal ossification, and metaphyseal cupping. In order to identify mutations causing OPS, a total of 16 cases (7 terminated pregnancies and 9 postnatal cases) from 10 unrelated families were included in this study. We performed exome sequencing in three cases from three unrelated families and only one gene was found to harbor mutations in all three cases: inositol polyphosphate phosphatase-like 1 (INPPL1)...
January 10, 2013: American Journal of Human Genetics
Jennifer E Below, Dawn L Earl, Kathryn M Shively, Margaret J McMillin, Joshua D Smith, Emily H Turner, Mark J Stephan, Lihadh I Al-Gazali, Jozef L Hertecant, David Chitayat, Sheila Unger, Daniel H Cohn, Deborah Krakow, James M Swanson, Elaine M Faustman, Jay Shendure, Deborah A Nickerson, Michael J Bamshad
Opsismodysplasia is a rare, autosomal-recessive skeletal dysplasia characterized by short stature, characteristic facial features, and in some cases severe renal phosphate wasting. We used linkage analysis and whole-genome sequencing of a consanguineous trio to discover that mutations in inositol polyphosphate phosphatase-like 1 (INPPL1) cause opsismodysplasia with or without renal phosphate wasting. Evaluation of 12 families with opsismodysplasia revealed that INPPL1 mutations explain ~60% of cases overall, including both of the families in our cohort with more than one affected child and 50% of the simplex cases...
January 10, 2013: American Journal of Human Genetics
Leslie Edward S Lewis, Y Ramesh Bhat, Prashant Naik, Kanchan Sethi, K M Girisha
Opsismodysplasia is a rare osteochondrodysplasia with micromelia and platyspondyly. We report on a neonate with opsismodysplasia. During the antenatal period, polyhydramnios was noted. This is the first report of opsismodysplasia from India. Significant observation was antenatal polyhydramnios.
May 2010: Indian Journal of Pediatrics
Ali Al Kaissi, Farid Ben Chehida, Maher Ben Ghachem, Franz Grill, Klaus Klaushofer
We report two siblings aged 11 and 7 years, respectively, who presented with the clinical and radiographic features of opsismodysplasia (non-lethal type). 3D computed tomography scans of the craniocervical region revealed a split atlas and os odontoideum in both siblings. To the best of our knowledge, this is the first clinical report detailing craniocervical malformations in two siblings with opsismodysplasia.
March 2009: Skeletal Radiology
Martha Dechert Zeger, Deanna Adkins, Lynn A Fordham, Kenneth E White, Eckhard Schoenau, Frank Rauch, Karen J Loechner
BACKGROUND: Opsismodysplasia is a rare spondylo(epi)chondrodysplasia characteristized by delayed skeletal maturation and a constellation of dysplastic features. Although metaphyseal irregularities/cupping have been noted, neither renal phosphate wasting nor rickets have previously been reported. OBJECTIVE: To evaluate hypophosphatemia and rickets in opsismodysplasia. PATIENTS: Two girls with opsismodysplasia presenting with hypophoshpatemia by 3 years of age...
January 2007: Journal of Pediatric Endocrinology & Metabolism: JPEM
Feliciano J Ramos, Juan P González, Carmen Cortabarria, Eduardo Domenech, José Pérez-González, Manuel Bueno
We present a case of opsismodysplasia, a very rare skeletal dysplasia, in a term newborn female who had short length, short extremities and markedly short fingers. Radiological studies demonstrated severe platyspondyly, absence of epiphyseal ossification centers, short tubular bones, especially severe in hands and feet, with metaphyseal cupping. She also had hydrocephaly, a rare finding in opsismodysplasia. In our literature review we have found 24 cases, 17 born alive and seven terminations of pregnancy (TOPs)...
January 2006: European Journal of Medical Genetics
H Numabe
No abstract text is available yet for this article.
2001: Ryōikibetsu Shōkōgun Shirīzu
K Tyler, N Sarioglu, J Kunze
We describe a family with two marriages of first cousins and a total of five children with opsismodysplasia. The diagnosis was based on clinical, radiological, and immunhistochemical findings. Helpful to the diagnosis was the testing with type I collagen antibodies, showing abnormally high levels in the hypertrophic area of growth cartilage. This observation supports the hypothesis of autosomal recessive transmission of opsismodysplasia.
March 5, 1999: American Journal of Medical Genetics
J Zeman, A Baxova, H Houstkova, K Kozlowski
A 6-month-old boy with opsismodysplasia is reported. The purpose of this paper is to draw attention to severe ureteric reflux and incidence of pseudo-obstruction, findings not previously reported in opsismodysplasia. They are most likely the result of an intrinsic neuromuscular defect which also affects the skeletal muscles. Another new feature, not reported in opsismodysplasia, was dilatation of ventricles probably secondary to brain atrophy.
February 1997: Australasian Radiology
F A Beemer, K S Kozlowski
The authors describe clinical and radiological findings in a 2-year-old boy from consanguineous parents. A diagnosis of opsi(s)modysplasia (= delayed maturation) had been made (MIM 258480). The purpose of this paper is to draw attention to the striking radiological manifestations. Consanguinity in the parents of our case and occurrence in a brother and sister in a previous report support an autosomal recessive transmission.
February 1, 1994: American Journal of Medical Genetics
H G Santos, J M Saraiva
No abstract text is available yet for this article.
July 1995: Clinical Dysmorphology
P Maroteaux, V Stanescu, R Stanescu, B Le Marec, C Moraine, H Lejarraga
The name opsismodysplasia is proposed for a new chondrodysplasia, which was studied in three patients. Clinically, the condition is recognized at birth on the basis of shortness, short hands, and facial abnormalities with a short nose and a depressed bridge of nose. The most characteristic radiographic signs are: very retarded bone maturation; marked shortness of the bones of the hands and of the feet with concave metaphyses; and thin, lamellar vertebral bodies. The growth cartilage studied in one case showed a wide hypertrophic area containing thick connective tissue septa, irregular provisional calcification, and vascular invasion...
September 1984: American Journal of Medical Genetics
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