Evaluation of acetylated histones 3 and 4 and histone deacetylases 1, 2 and 6 in cutaneous T-cell lymphoma in dogs /

• Main Author: Matiz, Oscar Rodrigo Sierra
• Other Authors: Universidade Estadual Paulista "Júlio de Mesquita Filho" Faculdade de Ciências Agrárias e Veterinárias.
• Format: Others
• Language: Portuguese
• Published: Jaboticabal, 2019
• Subjects: Epigenética.; Oncologia.; Enzimas.; Linfoma.
• Online Access: http://hdl.handle.net/11449/191235

Orientador: Mirela Tinucci Costa === Resumo: - Cutaneous lymphoma constitutes a form of extranodal lymphoma that affects initially the skin and/or adnexal structures and eventually presents an aggressive clinical behavior, causing internal organ infiltration in late-stage disease. The main immunophenotype is T-cell lymphoma (CTCL) and it represents the most common diagnosed type. It is expected that dogs with CTCL develop resistance to chemotherapy at any point during treatment, resulting in short survival times. A need for new therapeutic targets that improve survival expectation in dogs with CTCL is increasing. In humans, therapies based on epigenetic mechanisms helped to control the disease, since epigenetics became a main objective in the search for longer clinical responses in advance-stages. In the first two reported chapters, CTCL is described with particularities of international literature that contrast with data found in this institution, as well as, the role of epigenetics in the neoplasia carcinogenesis and the mechanism of histone modification as a base for treatment. More specifically, in the second chapter, 21 dogs with CTCL were defined as having high grade CTCL due to their large cell size, absence of epithelial tropism, mean value of Ki67 of 63,9% and estimated survival time of 31 days. Clinicopathological characteristics were analyzed for identifying prognostic markers, being the intrathoracic involvement caused by lymphoma seen on thoracic radiography an independent prognostic factor after multivaria... (Resumo completo, clicar acesso eletrônico abaixo) === Doutor