ABSTRACT
Background: Tet methylcytosine dioxygenase 2 (TET2) is frequently mutated and/or downregulated in myeloid neoplasm, including myelodysplastic syndromes. Despite the extensive studies, the specific contribution of TET2 in disease phenotype of myeloid neoplasms is not fully elucidated. Recent findings have grown attention on the role of TET2 in normal and malignant erythropoiesis. Methods: In the present study, we investigated TET2 mRNA levels by quantitative PCR during erythropoietin-induced erythroid differentiation CD34+ cells from healthy donor and myelodysplastic syndrome patients. Statistical analyses were performed using the ANOVA and Bonferroni post hoc test and a p-value <0.05 was considered statically significant. Results: TET2 expression is upregulated during erythroid differentiation of CD34+ cells from healthy donor and myelodysplastic syndrome patients. Conclusions: Our findings corroborate that TET2 is involved in the erythrocyte differentiation (AU)
Subject(s)
Male , Female , Aged , Myelodysplastic Syndromes , Antigens, CD34 , ErythropoiesisABSTRACT
A identificação e caracterização estrutural e funcional de genes diferencialmente expressos entre tecidos tumorais e normais constituem etapas fundamentais para permitir a compreensão do processo neoplásico e o desenvolvimento de novas estratégias antitumorais. Ankyrin Repeat Single KH Domain containing 1 (ANKHD1) foi inicialmente identificada em células de adenocarcinoma de próstata humano (LNCaP), no ano de 2003. Entretanto, seu padrão de expressão e sua função ainda não haviam sido caracterizados. A ANKHD1 é uma proteína ortóloga à Multiple Ankyrin repeat and single KH domain (Mask) da Drosophila melanogaster. Mask foi identificada através de um rastreamento genético utilizado para detectar novas proteínas associadas à proteína tirosina fosfatase Corkscrew (CSW), homóloga à Src Homology-2 domain-containing protein tyrosine Phosphatase-2 (SHP2) humana. SHP2 é uma fosfatase de tirosina citoplasmática codificada pelo gene PTPN11 e exerce papel fundamental no desenvolvimento da hematopoese normal e leucêmica. Os objetivos gerais do presente estudo foram caracterizar o padrão de expressão gênica de ANKHD1 em células hematopoéticas normais e leucêmicas e verificar sua função nos processos celulares. Neste estudo foi demonstrado que o gene ANKHD1localiza-se no cromossomo 5, possui vários transcritos variantes possivelmente gerados por mecanismos de clivagem alternativa e codifica proteínas com domínios de repetições de anquirina. A região promotora desse gene possui vários elementos regulatórios importantes como...
The identification and the structural and functional characterization of genes differentially expressed between tumors and normal tissues are fundamental steps towards the understanding of the neoplastic process and the development of new anti-cancer strategies. The Ankyrin Repeat Single KH Domain containing 1 (ANKHD1) was first described in humans in a prostate carcinoma cell line LNCaP, in 2003; however, the expression pattern and function of ANKHD1 have not yet been described. ANKHD1 is an orthologous protein of the Drosophila melanogaster, MASK (Multiple Ankyrin repeat and single KH domain), where it was first identified using a genetic screen designed to discover proteins that interact with the protein tyrosine phosphatase Corkscrew (CSW), which is a homolog to the SH2-containing protein tyrosine phosphatase (SHP2) in humans. SHP2 is a cytoplasmic protein-tyrosine phosphatase, coded by the PTPN11 gene and plays an important role in the development of normal hematopoiese and leukemogenesis. The aim of the present study was to characterize the gene expression pattern of ANKHD1 in normal and leukemic hematopoietic cells and to determine their function in cellular process.This study has demonstrated that the ANKHD1 gene is located on chromosome 5, this gene has several possible variant transcripts...