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We have previously demonstrated that Klhl14-AS is a competing endogenous RNA regulating several differentiation and survival factors in thyroid cancer, acting as tumor suppressor. Recently, also KLHL14 has been shown to function as tumor suppressor in diffuse large B-cell lymphoma and in malignant mesothelioma. Here we show that KLHL14 expression is strongly reduced in anaplastic thyroid cancer, the less differentiated and most aggressive type of thyroid neoplasia. Such reduction is reproduced in different in vivo and in vitro models of thyroid cancer, being invariably associated with loss of differentiation. When Klhl14 expression is rescued in thyroid transformed cells, it reduces the cell proliferation rate and increase the number of apoptotic cells. On the other side, Klhl14 loss of function in normal thyroid cells affects the expression of several regulatory as well as functional thyroid markers. All these findings suggest that KLHL14 could be considered as a novel tumor suppressor in thyroid cancer, by also revealing its physiological role in the maintenance of a fully differentiated and functional thyroid phenotype.<\/jats:p>","DOI":"10.1038\/s41420-024-02063-7","type":"journal-article","created":{"date-parts":[[2024,6,22]],"date-time":"2024-06-22T17:01:47Z","timestamp":1719075707000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["KLHL14 is a tumor suppressor downregulated in undifferentiated thyroid cancer"],"prefix":"10.1038","volume":"10","author":[{"given":"Matteo","family":"Esposito","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antonella","family":"Migliaccio","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sara Carmela","family":"Credendino","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rufina","family":"Maturi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nella","family":"Prevete","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7302-1174","authenticated-orcid":false,"given":"Gabriella","family":"De Vita","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,6,22]]},"reference":[{"key":"2063_CR1","doi-asserted-by":"publisher","DOI":"10.1186\/1479-7364-7-13","volume":"7","author":"BS Dhanoa","year":"2013","unstructured":"Dhanoa BS, Cogliati T, Satish AG, Bruford EA, Friedman JS. 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