LCM-RNAseq Highlights Intratumor Heterogeneity and a lncRNA Signature from Archival Tissues of GH-Secreting PitNETs.

Autor:	Cis L; Department of Translational Medicine and Surgery, Università Cattolica del Sacro Cuore, 00168 Rome, Italy., Nanni S; Department of Translational Medicine and Surgery, Università Cattolica del Sacro Cuore, 00168 Rome, Italy.; Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy., Gessi M; Department of Woman and Child Health Sciences and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy., Bianchi A; Department of Translational Medicine and Surgery, Università Cattolica del Sacro Cuore, 00168 Rome, Italy.; Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy.; ENETS Center of Excellence for the Diagnosis and Cure of Neuroendocrine Tumors, 00168 Rome, Italy., De Martino S; National Research Council (CNR)-Istituto di Analisi dei Sistemi ed Informatica 'Antonio Ruberti' (IASI), 00185 Rome, Italy., Pecci V; Department of Translational Medicine and Surgery, Università Cattolica del Sacro Cuore, 00168 Rome, Italy., Bonvissuto D; Department of Neuroscience, Università Cattolica del Sacro Cuore, 00168 Rome, Italy., Carlino A; Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy., Giacò L; Bioinformatics Core Facility, Gemelli Science and Technology Park (G-STeP), Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy., Rindi G; Department of Woman and Child Health Sciences and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy.; ENETS Center of Excellence for the Diagnosis and Cure of Neuroendocrine Tumors, 00168 Rome, Italy.; Section of Pathology, Department of Life Sciences, Università Cattolica del Sacro Cuore, 00168 Rome, Italy., Sette C; Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy.; Department of Neuroscience, Università Cattolica del Sacro Cuore, 00168 Rome, Italy., Grassi C; Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy.; Department of Neuroscience, Università Cattolica del Sacro Cuore, 00168 Rome, Italy., Gaetano C; Laboratory of Epigenetics, Istituti Clinici Scientifici Maugeri IRCCS, 20138 Pavia, Italy., Pontecorvi A; Department of Translational Medicine and Surgery, Università Cattolica del Sacro Cuore, 00168 Rome, Italy.; Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy., Farsetti A; National Research Council (CNR)-Istituto di Analisi dei Sistemi ed Informatica 'Antonio Ruberti' (IASI), 00185 Rome, Italy.
Jazyk:	angličtina
Zdroj:	Genes [Genes (Basel)] 2024 Oct 31; Vol. 15 (11). Date of Electronic Publication: 2024 Oct 31.
DOI:	10.3390/genes15111426
Abstrakt:	Background: This study explores the potential for hidden variations within seemingly uniform regions of growth hormone-secreting pituitary neuroendocrine tumors (GH-PitNETs). We employed archived tissue samples using Laser Capture Microdissection Sequencing (LCM-RNAseq) to probe the molecular landscape of these tumors at a deeper level. Methods: A customized protocol was developed to extract, process, and sequence small amounts of RNA from formalin-fixed, paraffin-embedded (FFPE) tissues derived from five patients with GH-secreting PitNETs and long-term follow-up (≥10 years). This approach ensured precise isolation of starting material of enough quality for subsequent sequencing. Results: The LCM-RNAseq analysis revealed a surprising level of diversity within seemingly homogeneous tumor regions. Interestingly, the 30 most highly expressed genes included the well-known long noncoding RNA (lncRNA) MALAT1. We further validated the levels of MALAT1 and of other tumor-associated lncRNAs using digital droplet PCR. Conclusions: This study demonstrates the potential of LCM-RNAseq to unlock hidden molecular diversity within archived pituitary tumor samples. By focusing on specific cell populations, we identified lncRNAs expressed at different levels within the tumors, potentially offering new insights into the complex biology of GH-secreting PitNETs. This evidence prompts further research into the role of lncRNAs in pituitary neuroendocrine tumor aggressiveness and personalized treatment strategies.
Databáze:	MEDLINE
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