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- W77691703 abstract "Diastrophic dysplasia is an autosomal recessive disorder characterized by short stature, dislocation of the joints, spinal deformities and malformation of the hands and feet. Multipoint linkage analysis places the diastrophic dysplasia (DTD) locus in 5q31-5q34. Linkage disequilibrium mapping places the DTD locus near CSFIR in the direction of PDGFRB (which is tandem to CSFIR). This same study tentatively placed PDGFRB and DTD proximal to CSFIR. Our results, as well as recently reported work from other laboratories, suggest that PDGFRB (and possibly DTD) is distal rather than proximal to CSFIR. We have constructed a cosmid contig covering approximately 200 kb of the region containing CSFIR. Several exons have been {open_quotes}trapped{close_quotes} from these cosmids using exon amplification. One of these exons was trapped from a cosmid isolated from a walk from PDGFRB, approximately 80 kb from CSFIR. This exon was sequenced and was determined to be 89% identical to the nucleotide sequence of exon two of the murine CDX1 gene (100% amino acid identity). The exon was used to isolate the human CDX gene. Sequence analysis of the human CDX1 gene indicates a very high degree of homology to the murine gene. CDX1 is a caudal type homeobox gene expressed during gastrulation.more » In the mouse, expression during gastrulation begins in the primitive streak and subsequently localizes to the ectodermal and mesodermal cells of the primitive streak, neural tube, somites, and limb buds. Later in gastrulation, CDX1 expression becomes most prominent in the mesoderm of the forelimbs, and, to a lesser extent, the hindlimbs. CDX1 is an intriguing candidate gene for diastrophic dysplasia. We are currently screening DNA from affected individuals and hope to shortly determine whether CDX1 is involved in this disorder.« less" @default.
- W77691703 created "2016-06-24" @default.
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- W77691703 date "1994-09-01" @default.
- W77691703 modified "2023-09-26" @default.
- W77691703 title "Isolation and characterization of the human CDX1 gene: A candidate gene for diastrophic dysplasia" @default.
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