Occurrence and expression of p53 suppressor gene and c-Myc oncogene in dog eyelid tumors

Autor(es)

Lopes, Rodrigo Antonio ^[1] ; Cardoso, Tereza Cristina ^[2] ; Rui Luvizotto, Maria Cecilia ^[3] ; de Andrade, Alexandre Lima ^[3]

Afiliação do(s) autor(es)

^[1] State Sao Paulo Univ, Vet Sci Course, Fac Odontol, Postgrad Programme Anim Sci, Aracatuba, SP - Brazil

^[2] State Sao Paulo Univ, Vet Sci Course, Fac Odontol, Dept Support Prod & Anim Sci, Aracatuba, SP - Brazil

^[3] State Sao Paulo Univ, Vet Sci Course, Fac Odontol, Dept Anim Clin Surg & Reprod, Aracatuba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: VETERINARY OPHTHALMOLOGY; v. 13, n. 2, p. 69-75, MAR 2010.
• Citações Web of Science: 7

Resumo

Purpose To detect the occurrence and expression of the suppressor gene p53 and of the oncogene c-Myc in eyelid tumors of dogs using the PCR, RT-PCR, PCR-ELISA and RT-PCR-ELISA techniques. These genes have not been described in dog eyelid tumors before. Methods Nine samples of eyelid or third eyelid epithelial tumors were obtained from the archives of the Department of Veterinary Pathology. Tumor diagnosis was confirmed by evaluation of hematoxylin-eosin stained sections, and immunohistochemistry for cytokeratin AE1/AE3 and vimentin V9. A canine mammary tumor was used for positive control. Agarose gel electrophoresis, PCR-ELISA and RT-PCR-ELISA were used to detect p53 and c-Myc genes. Results The occurrence of p53 was detected in most of the eyelid tumors and third eyelid tumors studied (88.8%, n = 8) and was expressed in 75% of the positive samples, as indicated by ELISA. The c-Myc gene was found in 77.7% (n = 7) of the samples and was expressed in eight samples. Conclusions Eyelid and third eyelid tumors of dogs express both the p53 and the c-Myc genes as shown by PCR and RT-PCR. However, PCR ELISA and RT-PCR ELISA were more efficient in assessing occurrence and expression of these genes because they identified amplified products that were not detected by agarose gel electrophoresis. (AU)

• Processo FAPESP: 06/54942-3 - Expressao genica do p53 e c-myc em tumores dos anexos oculares em caes
• Beneficiário: Rodrigo Antônio Lopes
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 08/00429-9 - Expressão gênica do P53 e C-myc de tumores dos anexos oculares em cães
• Beneficiário: Alexandre Lima de Andrade
• Modalidade de apoio: Auxílio à Pesquisa - Regular