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Keywords = micropapillary (MPP)

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14 pages, 3366 KB  
Article
Whole-Exome Sequencing Reveals the Genomic Features of the Micropapillary Component in Ground-Glass Opacities
by Fanchen Meng, Yi Zhang, Siwei Wang, Tongyan Liu, Mengting Sun, Hongyu Zhu, Guozhang Dong, Zhijun Xia, Jing You, Xiangru Kong, Jintao Wu, Peng Chen, Fangwei Yuan, Xinyu Yu, Youtao Xu, Lin Xu and Rong Yin
Cancers 2022, 14(17), 4165; https://doi.org/10.3390/cancers14174165 - 27 Aug 2022
Cited by 7 | Viewed by 2688
Abstract
Background: Micropapillary components are observed in a considerable proportion of ground-glass opacities (GGOs) and contribute to the poor prognosis of patients with invasive lung adenocarcinoma (LUAD). However, the underlying mutational processes related to the presence of micropapillary components remain obscure, limiting the development [...] Read more.
Background: Micropapillary components are observed in a considerable proportion of ground-glass opacities (GGOs) and contribute to the poor prognosis of patients with invasive lung adenocarcinoma (LUAD). However, the underlying mutational processes related to the presence of micropapillary components remain obscure, limiting the development of clinical interventions. Methods: We collected 31 GGOs, which were separated into paired micropapillary and non-micropapillary components using microdissection. Whole-exome sequencing (WES) was performed on the GGO components, and bioinformatics analysis was conducted to reveal the genomic features of the micropapillary component in invasive LUAD. Results: The micropapillary component had more genomic variations, including tumor mutation burden, intratumoral heterogeneity, and copy number variation. We also observed the enrichment of AID/APOBEC mutation signatures and an increased activation of the RTK/Ras, Notch, and Wnt oncogenic pathways within the micropapillary component. A phylogenetic analysis further suggested that ERBB2/3/4, NCOR1/2, TP53, and ZNF469 contributed to the micropapillary component’s progression during the early invasion of LUAD, a finding that was validated in the TCGA cohort. Conclusions: Our results revealed specific mutational characteristics of the micropapillary component of invasive LUAD in an Asian population. These characteristics were associated with the formation of high-grade invasive patterns. These preliminary findings demonstrated the potential of targeting the micropapillary component in patients with early-stage LUAD. Full article
(This article belongs to the Special Issue Genomics and Bioinformatics Based Analysis of Cancer)
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