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2.
Ann Hematol ; 97(3): 533-535, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29151134
5.
Oncogene ; 21(53): 8173-7, 2002 Nov 21.
Artigo em Inglês | MEDLINE | ID: mdl-12444553

RESUMO

Pituitary tumor-transforming gene (pttg) is a distinct proto-oncogene which is expressed in certain normal tissues with high proliferation rate and in a variety of tumors. PTTG is the vertebrate analog of yeast securins Pds1 and Cut2 with a key role in the regulation of sister chromatid separation during mitosis. Impairment of PTTG regulated functions is expected to lead to chromosomal instability and aneuploidy. Human pttg (hpttg) is abundantly expressed in Jurkat T lymphoblastic lymphoma cells but not in normal peripheral blood leukocytes. To obtain additional data on the potential role of hpttg in lymphomagenesis we selected 150 cases of lymphoid tumors for the assessment of hpttg expression in tumor tissues. Immunohistochemical studies on formalin-fixed, paraffin-embedded tissues revealed hPTTG in 38.8% of B-cell lymphomas, 70.2% of T-cell lymphomas, and 73.1% of Hodgkin's lymphomas. Among B-cell lymphomas, the most frequently immunostained tumors were plasma cell tumors, diffuse large cell lymphomas, and follicle center cell lymphomas. In Hodgkin's disease, immunoreactivity was mainly noted in Reed-Sternberg cells. In conclusion, the frequent overexpression of hpttg in many histological subtypes of lymphoma suggests the involvement of this proto-oncogene in lymphomagenesis.


Assuntos
Linfoma/química , Proteínas de Neoplasias/análise , Northern Blotting , Regulação Neoplásica da Expressão Gênica , Doença de Hodgkin/genética , Doença de Hodgkin/metabolismo , Humanos , Técnicas Imunoenzimáticas , Linfoma/genética , Linfoma de Células B/química , Linfoma de Células B/genética , Linfoma Difuso de Grandes Células B/química , Linfoma Difuso de Grandes Células B/genética , Linfoma de Células T/química , Linfoma de Células T/genética , Proteínas de Neoplasias/genética , Proteínas de Neoplasias/fisiologia , Proto-Oncogene Mas , RNA Mensageiro/análise , RNA Mensageiro/biossíntese , RNA Neoplásico/análise , RNA Neoplásico/biossíntese , Células de Reed-Sternberg/química , Securina
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