Abstract
HIRSCHSPRUNG'S disease (HSCR)1 is a common condition (1 in 5,000 live births) resulting in intestinal obstruction in neonates2 and megacolon in infants and adults3. This disease has been ascribed to the absence of autonomic ganglion cells, which are derived from the neural crest, in the terminal hindgut4. Segregation analyses have suggested incompletely penetrant dominant inheritance in familial HSCR5. Recently, a gene for HSCR has been mapped to chromosome 10q11.2 (refs 6, 7). No recombination was observed between the disease locus and the locus for the RET proto-oncogene8, a protein tyrosine kinase gene expressed in the cells derived from the neural crest9,10. Here we report nonsense and missense mutations in the extracellular domain of RET protein (exons 2, 3, 5 and 6) in six unrelated probands and show that the mutant genotypes segregate with the disease in HSCR families. Mutations of RET have been previously reported in multiple endocrine neoplasia type 2A (MEN 2A)11,12. Thus, germ-line mutations of the RET gene may contribute either to developmental anomalies in HSCR or to inherited predisposition to cancer in MEN 2A.
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Edery, P., Lyonnet, S., Mulligan, L. et al. Mutations of the RET proto-oncogene in Hirschsprung's disease. Nature 367, 378–380 (1994). https://doi.org/10.1038/367378a0
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DOI: https://doi.org/10.1038/367378a0