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The RET receptor: function in development and dysfunction in congenital malformation
1Laboratoire de Génétique, CNRS UMR 5641, Domaine Rockefeller, 8 avenue Rockefeller, 69373 Cedex 08, Lyon, France.
Abstract:
Germline mutations in the RET proto-oncogene are responsible for two unrelated neural crest disorders: Hirschsprung disease, a congenital absence of the enteric nervous system in the hindgut, and multiple endocrine neoplasia type 2, a dominantly inherited cancer syndrome. Moreover, somatic rearrangements of RET are causally involved in the genesis of papillary thyroid carcinoma. The receptor tyrosine kinase encoded by the RET gene acts as the subunit of a multimolecular complex that binds four distinct ligands and activates a signalling network crucial for neural and kidney development. Over the past few years, a clearer picture of the mode of RET activation and of its multifaceted role during development has started to emerge. These findings, which provide new clues to the molecular mechanisms underlying RET signalling dysfunction in Hirschsprung disease, are summarized in this review.
Insights
Germline mutations in the RET gene cause Hirschsprung disease and MEN2. This review details RET signaling, crucial for development, and its role in these disorders.
Area of Science:
- Genetics
- Developmental Biology
- Oncology
Background:
- The RET proto-oncogene is implicated in neural crest disorders and cancer.
- RET encodes a receptor tyrosine kinase vital for neural and kidney development.
- Dysregulation of RET signaling contributes to disease pathogenesis.
Purpose of the Study:
- To review the molecular mechanisms of RET activation.
- To elucidate the role of RET signaling in development.
- To connect RET signaling dysfunction to Hirschsprung disease.
Main Methods:
- Review of existing literature on RET gene mutations and signaling pathways.
- Analysis of RET's role in neural crest development.
- Examination of RET's involvement in Hirschsprung disease and MEN2.
Main Results:
- Germline RET mutations cause Hirschsprung disease and multiple endocrine neoplasia type 2 (MEN2).
- Somatic RET rearrangements are involved in papillary thyroid carcinoma.
- RET signaling is essential for neural and kidney development.
Conclusions:
- Understanding RET activation provides insights into developmental disorders.
- RET signaling pathways are critical targets for therapeutic strategies.
- This review highlights the multifaceted role of RET in health and disease.
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