Copy number alterations and epithelial‑mesenchymal transition genes in diffuse and intestinal gastric cancers in Mexican patients

Larios-Serrato,Violeta; Martínez‑Ezquerro,José-Darío; Valdez‑Salazar,Hilda-Alicia; Torres,Javier; Camorlinga‑Ponce,Margarita; Piña‑Sánchez,Patricia; Ruiz‑Tachiquín,Martha-Eugenia

doi:10.3892/mmr.2022.12707

Copy number alterations and epithelial‑mesenchymal transition genes in diffuse and intestinal gastric cancers in Mexican patients

Authors:
- Violeta Larios-Serrato
- José-Darío Martínez‑Ezquerro
- Hilda-Alicia Valdez‑Salazar
- Javier Torres
- Margarita Camorlinga‑Ponce
- Patricia Piña‑Sánchez
- Martha-Eugenia Ruiz‑Tachiquín
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Affiliations: Laboratory of Biotechnology and Genomic Bioinformatics, National School of Biological Sciences (ENCB), National Polytechnic Institute (IPN), Lázaro Cárdenas Professional Unit, Mexico City 11340, Mexico, Epidemiological and Health Services Research Unit, Aging Area (UIESSAE), XXI Century National Medical Center, Mexican Social Security Institute (IMSS), Mexico City 06720, Mexico, Infectious and Parasitic Diseases Medical Research Unit (UIMEIP), High Specialty Medical Unit (UMAE)‑Pediatrics Hospital ‘Dr. Silvestre Frenk Freund’, XXI Century National Medical Center, IMSS, Mexico City 06720, Mexico, Oncological Diseases Medical Research Unit (UIMEO), UMAE‑Oncology Hospital, XXI Century National Medical Center, Mexican Social Security Institute (IMSS), Mexico City 06720, Mexico
Published online on: March 31, 2022 https://doi.org/10.3892/mmr.2022.12707
Article Number: 191
Copyright: © Larios-Serrato et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Gastric cancer (GC) is a common malignancy with the highest mortality rate among diseases of the digestive system, worldwide. The present study of GC alterations is crucial to the understanding of tumor biology and the establishment of important aspects of cancer prognosis and treatment response. In the present study, DNA from Mexican patients with diffuse GC (DGC), intestinal GC (IGC) or non‑atrophic gastritis (NAG; control) was purified and whole‑genome analysis was performed with high‑density arrays. Shared and unique copy number alterations (CNA) were identified between the different tissues involving key genes and signaling pathways associated with cancer. This led to the molecular distinction and identification of the most relevant molecular functions to be identified. A more detailed bioinformatics analysis of epithelial‑mesenchymal transition (EMT) genes revealed that the altered network associated with chromosomal alterations included 11 genes that were shared between DGC, IGC and NAG, as well as 19 DGC‑ and 7 IGC‑exclusive genes. Furthermore, the main molecular functions included adhesion, angiogenesis, migration, metastasis, morphogenesis, proliferation and survival. The present study provided the first whole‑genome high‑density array analysis in Mexican patients with GC and revealed shared and exclusive CNA‑associated genes in DGC and IGC. In addition, a bioinformatics‑predicted network was generated, focusing on CNA‑altered genes associated with EMT and the hallmarks of cancer, as well as precancerous alterations that may lead to GC. Molecular signatures of diffuse and intestinal GC, predicted bioinformatically, involve common and distinct CNA‑EMT genes related to the hallmarks of cancer that are potential candidates for screening biomarkers of GC, including early stages.

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