Molecular characterization of epithelial-mesenchymal transition and medical treatment related-genes in non-functioning pituitary neuroendocrine tumors.

Abstract

Introduction:

Different medical therapies have been developed for pituitary adenomas. However, Non-Functioning Pituitary Neuroendocrine Tumors (NF-PitNET) have shown little response to them. Furthermore, epithelial-mesenchymal transition (EMT) has been linked to resistance to medical treatment in a significant number of tumors, including pituitary adenomas.

Methods:

We aimed to evaluate the expression of EMT-related markers in 72 NF-PitNET and 16 non-tumoral pituitaries. To further explore the potential usefulness of medical treatment for NF-PitNET we assessed the expression of somatostatin receptors and dopamine-associated genes.

Results:

We found that SNAI1, SNAI2, Vimentin, KLK10, PEBP1, Ki-67 and SSTR2 were associated with invasive NF-PitNET. Furthermore, we found that the EMT phenomenon was more common in NF-PitNET than in GH-secreting pituitary tumors. Interestingly, PEBP1 was overexpressed in recurrent NF-PitNET, and could predict growth recurrence with 100% sensitivity but only 43% specificity. In parallel with previously reported studies, SSTR3 is highly expressed in our NF-PitNET cohort. However, SSTR3 expression is highly heterogeneous among the different histological variants of NF-PitNET with very low levels in silent corticotroph adenomas.

Conclusion:

NF-PitNET showed an enhanced EMT phenomenon. SSTR3 targeting could be a good therapeutic candidate in NF-PitNET except for silent corticotroph adenomas, which express very low levels of this receptor. In addition, PEBP1 could be an informative biomarker of tumor regrowth, useful for predictive medicine in NF-PitNET.

• Authors: Joan Gil, Montserrat Marques-Pamies, Elena Valassi, Guillermo Serra, Isabel Salinas, Gemma Xifra, Paula Casano-Sancho, Cristina Carrato, Betina Biagetti, Gemma Sesmilo, Jennifer Marcos-Ruiz, Helena Rodriguez-Lloveras, Anna Rueda-Pujol, Anna Aulinas, Alberto Blanco, Cristina Hostalot, Andreu Simó-Servat, Fernando Muñoz, Marta Rico, Javier Ibáñez-Domínguez, Esteban Cordero, Susan M Webb, Mireia Jordà, Manel Puig-Domingo
• Journal: Frontiers in endocrinology (Front Endocrinol (Lausanne)) Vol. 14 Pg. 1129213 ( 2023) ISSN: 1664-2392 [Print] Switzerland
• PMID: 37033229 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2023 Gil, Marques-Pamies, Valassi, Serra, Salinas, Xifra, Casano-Sancho, Carrato, Biagetti, Sesmilo, Marcos-Ruiz, Rodriguez-Lloveras, Rueda-Pujol, Aulinas, Blanco, Hostalot, Simó-Servat, Muñoz, Rico, Ibáñez-Domínguez, Cordero, Webb, Jordà and Puig-Domingo.

Topics

• Humans
• Pituitary Neoplasms (drug therapy, genetics, metabolism)
• ACTH-Secreting Pituitary Adenoma
• Neuroendocrine Tumors (drug therapy, genetics)
• Epithelial-Mesenchymal Transition (genetics)
• Adenoma (drug therapy, genetics, metabolism)