Biological Effects of the Dual Phenotypic Janus Mutation of ret Cosegregating with Both Multiple Endocrine Neoplasia Type 2 and Hirschsprung’s Disease

Abstract excerpt

Gain-of-function mutations of ret receptor tyrosine kinase, the signaling receptor for glial cell line-derived neurotrophic factor, cause sporadic thyroid and adrenal malignancies as well as endocrine cancer syndromes, such as multiple endocrine neoplasia types 2A and 2B (MEN 2A and MEN 2B) and familial medullary thyroid carcinoma. Loss-of-function mutations of ret cause Hirschsprung's disease (HSCR) or colonic...

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