PMID- 10360402 OWN - NLM STAT- MEDLINE DCOM- 19990823 LR - 20161124 IS - 0148-7299 (Print) IS - 0148-7299 (Linking) VI - 84 IP - 5 DP - 1999 Jun 11 TI - Platyspondylic lethal skeletal dysplasia, San Diego type, is caused by FGFR3 mutations. PG - 476-80 AB - The platyspondylic lethal skeletal dysplasias (PLSDs) are a heterogeneous group of short-limb dwarfing conditions. The most common form of PLSD is thanatophoric dysplasia (TD), which has been divided into two types (TD1 and TD2). Three other types of PLSD, or TD variants (San Diego, Torrance, and Luton), have been distinguished from TD. The most notable difference between TD and the variants is the presence of large rough endoplasmic reticulum (rER) inclusion bodies within chondrocytes of the variants. We examined 22 cases of TD variants for the presence of missense mutations in the fibroblast growth factor receptor 3 (FGFR3) gene. All 17 cases of the San Diego type (PLSD-SD) were heterozygous for the same FGFR3 mutations found in TD1. No mutations were identified in the Torrance and Luton types. Large inclusion bodies were found in all 14 cases of PLSD-SD. Similar inclusion bodies were present in two of 72 TD1 cases, but not in 39 controls. The material retained within the rER stained only with antibody to the FGFR3 protein. The radiographic and morphologic differences between TD and PLSD-SD may be a consequence of other genetic factors, perhaps in the processing of mutant FGFR3 molecules within the rER. The presence of rER inclusion bodies cannot reliably discriminate between closely related skeletal dysplasias. FAU - Brodie, S G AU - Brodie SG AD - Ahmanson Department of Pediatrics, Steven Spielberg Pediatric Research Center, Cedars-Sinai Burns and Allen Research Institute, Los Angeles, California 90048, USA. FAU - Kitoh, H AU - Kitoh H FAU - Lachman, R S AU - Lachman RS FAU - Nolasco, L M AU - Nolasco LM FAU - Mekikian, P B AU - Mekikian PB FAU - Wilcox, W R AU - Wilcox WR LA - eng GR - 5P01-HD22657/HD/NICHD NIH HHS/United States GR - M01-RR00425/RR/NCRR NIH HHS/United States GR - P30-HD34610/HD/NICHD NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Am J Med Genet JT - American journal of medical genetics JID - 7708900 RN - 0 (Receptors, Fibroblast Growth Factor) RN - EC 2.7.10.1 (FGFR3 protein, human) RN - EC 2.7.10.1 (Protein-Tyrosine Kinases) RN - EC 2.7.10.1 (Receptor, Fibroblast Growth Factor, Type 3) SB - IM MH - Chondrocytes/ultrastructure MH - Endoplasmic Reticulum, Rough/ultrastructure MH - Female MH - Fetus/abnormalities/diagnostic imaging MH - Humans MH - Immunohistochemistry MH - Inclusion Bodies/ultrastructure MH - *Mutation, Missense MH - Osteochondrodysplasias/classification/diagnostic imaging/embryology/*genetics MH - Pregnancy MH - Pregnancy Trimester, Second MH - *Protein-Tyrosine Kinases MH - Radiography MH - Receptor, Fibroblast Growth Factor, Type 3 MH - Receptors, Fibroblast Growth Factor/analysis/*genetics MH - Thanatophoric Dysplasia/diagnostic imaging/embryology/*genetics EDAT- 1999/06/09 10:00 MHDA- 2000/06/20 09:00 CRDT- 1999/06/09 10:00 PHST- 1999/06/09 10:00 [pubmed] PHST- 2000/06/20 09:00 [medline] PHST- 1999/06/09 10:00 [entrez] AID - 10.1002/(SICI)1096-8628(19990611)84:5<476::AID-AJMG12>3.0.CO;2-X [pii] PST - ppublish SO - Am J Med Genet. 1999 Jun 11;84(5):476-80.