Functional analysis of HOXA10 and HOXB4 in human medulloblastoma cell lines

Autor(es):Mostrar menos -

Bonfim-Silva, Ricardo ^[1] ; Ferreira Melo, Fernanda Ursoli ^[2] ; Thome, Carolina Hassibe ^[3] ; Abraham, Kuruvilla Joseph ^[4] ; De Souza, Fabio Augusto Labre ^[1] ; Ramalho, Fernando Silva ^[5] ; Machado, Helio Rubens ^[6] ; De Oliveira, Ricardo Santos ^[6] ; Cardoso, Angelo A. ^[7] ; Covas, Dimas Tadeu ^[8] ; Fontes, Aparecida Maria ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Genet, Av Bandeirantes 3900, BR-14049900 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Reg Blood Ctr Ribeirao Preto, Av Bandeirantes 3900, BR-14049900 Sao Paulo - Brazil

^[3] Univ Sao Paulo, Dept Biochem & Immunol, Av Bandeirantes 3900, BR-14049900 Sao Paulo - Brazil

^[4] Univ Sao Paulo, Dept Pediat, Av Bandeirantes 3900, BR-14049900 Sao Paulo - Brazil

^[5] Univ Sao Paulo, Dept Pathol & Legal Med, Ribeirao Preto Med Sch, Av Bandeirantes 3900, BR-14049900 Sao Paulo - Brazil

^[6] Univ Sao Paulo, Div Pediat Neurosurg, Dept Surg & Anat, Univ Hosp Ribeirao Preto Med Sch, Av Bandeirantes 3900, BR-14049900 Sao Paulo - Brazil

^[7] City Hope Alpha Stem Cell Clin, Ctr Gene Therapy, Duarte, CA 91010 - USA

^[8] Univ Sao Paulo, Dept Internal Med, Av Bandeirantes 3900, BR-14049900 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: International Journal of Oncology; v. 51, n. 6, p. 1929-1940, DEC 2017.
• Citações Web of Science: 4

Resumo

Medulloblastoma (MB) is a malignant childhood brain tumor which at molecular level is classified into at least four major subtypes: WNT, SHH, group C and group D differing in response to treatment. Previous studies have associated changes in expression levels and activation of certain HOX genes with MB development. In the present study, we investigate the role of HOX genes in two attributes acquired by tumor cells: migration and proliferation potential, as well as, in vivo tumorigenic potential. We analyzed UW402, UW473, DAOY and ONS-76 human pediatric MB cell lines and cerebellum primary cultures. Two-color microarray-based gene expression analysis was used to identify differentially expressed HOX genes. Among the various HOX genes significantly overexpressed in DAOY and ONS-76 cell lines compared to UW402 and UW473 cell lines, HOXA10 and HOXB4 were selected for further analysis. The expression levels of these HOX genes were validated by real-time PCR. A mouse model was used to study the effect of the HOXA10 and HOXB4 genes on the in vivo tumorigenic potential and the in vitro proliferative and migration potential of MB cell lines. Our results show that the inhibition of HOXA10 in DAOY cell line led to increased in vitro cell migration while in vitro cell proliferation or in vivo tumorigenic potential were unaffected. We also observed that induced expression of HOXB4 in the UW473 cell line significantly reduced in vitro cell proliferation and migration capability of UW473 cells with no effect on the in vivo tumorigenicity. This suggests that HOXA10 plays a role in migration events and the HOXB4 gene is involved in proliferation and migration processes of medulloblastoma cells, however, it appears that these genes are not essential for the tumorigenic process of these cells. (AU)

• Processo FAPESP: 11/20829-4 - Mecanismos epigenéticos de modulação dos genes HOX em meduloblastoma
• Beneficiário: Aparecida Maria Fontes
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 11/18664-7 - O papel do lncRNA Evf-2 na modulação dos genes Hox e potencial metastático de Meduloblastoma
• Beneficiário: Ricardo Bonfim Silva
• Modalidade de apoio: Bolsas no Brasil - Doutorado