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Expanding Therapeutic Opportunities for Extrapulmonary Neuroendocrine Carcinoma.

Abstract
Poorly differentiated neuroendocrine carcinomas (PD-NEC) are rare cancers garnering interest as they become more commonly encountered in the clinic. This is due to improved diagnostic methods and the increasingly observed phenomenon of "NE lineage plasticity," whereby nonneuroendocrine (non-NE) epithelial cancers transition to aggressive NE phenotypes after targeted treatment. Effective treatment options for patients with PD-NEC are challenging for several reasons. This includes a lack of targetable, recurrent molecular drivers, a paucity of patient-relevant preclinical models to study biology and test novel therapeutics, and the absence of validated biomarkers to guide clinical management. Although advances have been made pertaining to molecular subtyping of small cell lung cancer (SCLC), a PD-NEC of lung origin, extrapulmonary (EP)-PD-NECs remain understudied. This review will address emerging SCLC-like, same-organ non-NE cancer-like and tumor-type-agnostic biological vulnerabilities of EP-PD-NECs, with the potential for therapeutic exploitation. The hypotheses surrounding the origin of these cancers and how "NE lineage plasticity" can be leveraged for therapeutic purposes are discussed. SCLC is herein proposed as a paradigm for supporting progress toward precision medicine in EP-PD-NECs. The aim of this review is to provide a thorough portrait of the current knowledge of EP-PD-NEC biology, with a view to informing new avenues for research and future therapeutic opportunities in these cancers of unmet need.
AuthorsMelissa Frizziero, Elaine Kilgour, Kathryn L Simpson, Dominic G Rothwell, David A Moore, Kristopher K Frese, Melanie Galvin, Angela Lamarca, Richard A Hubner, Juan W Valle, Mairéad G McNamara, Caroline Dive
JournalClinical cancer research : an official journal of the American Association for Cancer Research (Clin Cancer Res) Vol. 28 Issue 10 Pg. 1999-2019 (05 13 2022) ISSN: 1557-3265 [Electronic] United States
PMID35091446 (Publication Type: Journal Article, Review, Research Support, Non-U.S. Gov't)
Copyright©2022 American Association for Cancer Research.
Chemical References
  • Biomarkers, Tumor
Topics
  • Biomarkers, Tumor (therapeutic use)
  • Carcinoma, Neuroendocrine (diagnosis, drug therapy, genetics)
  • Humans
  • Infant, Newborn
  • Lung (pathology)
  • Lung Neoplasms (drug therapy, genetics)
  • Neuroendocrine Tumors (drug therapy, pathology)
  • Small Cell Lung Carcinoma (pathology)

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