title: Interrelationship between MYC gene numerical aberrations and protein expression in individuals from northern Brazil with early gastric adenocarcinoma.
abstract: Gastric cancer is the second leading cause of death by cancer in Brazil. Early gastric cancer represents approximately 10% of gastric cancer cases in some services of Brazil, which underscores the need for early gastric cancer diagnosis that could lead to better prognosis. There are few published studies of cytogenetic alterations in early gastric cancer. To evaluate MYC copy number and its protein expression, we performed fluorescence in situ hybridization and immunohistochemical analyses in five early gastric adenocarcinomas in individuals from northern Brazil. Three signals of MYC and MYC immunoreactivity were observed in all five samples, regardless of histologic type, tumor extension, or lymph nodal status. These novel findings concerning MYC copy number alteration in early gastric cancer suggest that MYC alteration is observed in the beginning of gastric carcinogenesis and could be used as a therapeutic target.
authors.affiliation: Human Cytogenetics and Toxicological Genetics Laboratory, Institute of Biological Sciences, Federal University of Pará, Campus Universitário do Guamá, Av. Augusto Correa, 01, CEP 66075-900, Belém, PA, Brazil.
authors.forename: Láuren Cláudia
authors.initials: LC
authors.lastname: Costa Raiol
authors.forename: Evely Cristina
authors.initials: EC
authors.lastname: Figueira Silva
authors.forename: Diana
authors.initials: D
authors.lastname: Mendes da Fonseca
authors.forename: Mariana Ferreira
authors.initials: MF
authors.lastname: Leal
authors.forename: Adriana Costa
authors.initials: AC
authors.lastname: Guimarães
authors.forename: Danielle Queiroz
authors.initials: DQ
authors.lastname: Calcagno
authors.forename: André Salim
authors.initials: AS
authors.lastname: Khayat
authors.forename: Paulo Pimentel
authors.initials: PP
authors.lastname: Assumpção
authors.forename: Marília
authors.initials: M
authors.lastname: de Arruda Cardoso Smith
authors.forename: Rommel Rodríguez
authors.initials: RR
authors.lastname: Burbano
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics* / Q000473:pathology; D000328:Adult; D000368:Aged; D001938:Brazil; D002869:Chromosome Aberrations; D005260:Female; D005784:Gene Amplification; D016259:Genes, myc; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009367:Neoplasm Staging; D013274:Stomach Neoplasms / Q000235:genetics* / Q000473:pathology