PMID- 38022621 OWN - NLM STAT- MEDLINE DCOM- 20231201 LR - 20240325 IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 14 DP - 2023 TI - Histological transformation into SCLC: An important resistance mechanism of NSCLC upon immunotherapy. PG - 1275957 LID - 10.3389/fimmu.2023.1275957 [doi] LID - 1275957 AB - The phenomenon of histological transformation has been widely reported in advanced non-small cell lung cancer (NSCLC) with EGFR mutations following the failure of EGFR-TKI treatment. Recent evidence suggests that similar histological changes can also occur in advanced NSCLC without driver gene mutations after developing resistance to immunotherapy. In this review, it was found that 66.7% of cases with immunotherapy-induced histological transformation were classified as lung squamous cell carcinoma (LSCC), while histological conversion into lung adenocarcinoma (LUAD) without EGFR or ALK gene mutations has rarely been reported. There have been sporadic reports on the occurrence of mutual transformation between LUAD and LSCC. The histological conversion from NSCLC into small cell lung cancer (SCLC) appears to be significantly underestimated, likely due to the infrequency of re-biopsy following the development of immunotherapy resistance. Several studies have reported a close association between the transformation and mutations at TP53 and the RB1 splice site, as well as the loss of an FBXW7 mutation. However, the exact mechanisms underlying this conversion remain unclear. Currently, there is a lack of guidelines for the management of transformed SCLC from NSCLC following immunotherapy, with chemotherapy being the most commonly employed treatment approach. CI - Copyright (c) 2023 Zeng, Ding, Ding and Wang. FAU - Zeng, Jiao AU - Zeng J AD - Department of Hematology & Oncology, Jiujiang University Affiliated Hospital, Jiujiang, Jiangxi, China. AD - Graduate Department, Gannan Medical University, Ganzhou, Jiangxi, China. FAU - Ding, Xinjing AU - Ding X AD - Department of Oncology, First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China. FAU - Ding, Jianghua AU - Ding J AD - Department of Hematology & Oncology, Jiujiang University Affiliated Hospital, Jiujiang, Jiangxi, China. FAU - Wang, Xin AU - Wang X AD - Department of Social Medicine and Public Health, School of Basic Medicine, Jiujiang University, Jiujiang, Jiangxi, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20231030 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 RN - EC 2.7.10.1 (ErbB Receptors) SB - IM MH - Humans MH - *Carcinoma, Non-Small-Cell Lung/therapy/drug therapy MH - *Small Cell Lung Carcinoma/therapy/drug therapy MH - *Lung Neoplasms/drug therapy/genetics MH - ErbB Receptors/genetics MH - *Adenocarcinoma of Lung/genetics MH - Immunotherapy PMC - PMC10646212 OTO - NOTNLM OT - histological transformation OT - immunotherapy OT - non-small cell lung cancer OT - resistance OT - small cell lung cancer COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2023/11/29 18:42 MHDA- 2023/12/01 06:43 PMCR- 2023/01/01 CRDT- 2023/11/29 15:28 PHST- 2023/08/10 00:00 [received] PHST- 2023/10/16 00:00 [accepted] PHST- 2023/12/01 06:43 [medline] PHST- 2023/11/29 18:42 [pubmed] PHST- 2023/11/29 15:28 [entrez] PHST- 2023/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2023.1275957 [doi] PST - epublish SO - Front Immunol. 2023 Oct 30;14:1275957. doi: 10.3389/fimmu.2023.1275957. eCollection 2023.