RESUMO
BACKGROUND: Prostate cancer is a common malignant tumor with a high incidence. MicroRNAs (miRNAs) have been shown to be important post-transcriptional regulators during tumorigenesis. This study aimed to explore the effect of miR-144 on PCa proliferation and apoptosis. MATERIAL AND METHODS: The expression of miR-144 and EZH2 were examined in clinical PCa tissues. PCa cell line LNCAP and DU-145 was employed and transfected with miR-144 mimics or inhibitors. The correlation between miR-144 and EZH2 was verified by luciferase reporter assay. Cell viability, apoptosis and migratory capacity were detected by CCK-8, flow cytometry assay and wound healing assay. The protein level of EZH2, E-Cadherin, N-Cadherin and vimentin were analyzed by western blotting. RESULTS: miR-144 was found to be negatively correlated to the expression of EZH2 in PCa tissues. Further studies identified EZH2 as a direct target of miR-144. Moreover, overexpression of miR-144 downregulated expression of EZH2, reduced cell viability and promoted cell apoptosis, while knockdown of miR-144 led to an inverse result. miR-144 also suppressed epithelial-mesenchymal transition level of PCa cells. CONCLUSION: Our study indicated that miR-144 negatively regulate the expression of EZH2 in clinical specimens and in vitro. miR-144 can inhibit cell proliferation and induce cell apoptosis in PCa cells. Therefore, miR-144 has the potential to be used as a biomarker for predicting the progression of PCa.
Assuntos
Proteína Potenciadora do Homólogo 2 de Zeste/genética , Regulação Neoplásica da Expressão Gênica , MicroRNAs/genética , Neoplasias da Próstata/genética , Neoplasias da Próstata/patologia , Interferência de RNA , Regiões 3' não Traduzidas , Idoso , Idoso de 80 Anos ou mais , Apoptose , Biomarcadores Tumorais , Linhagem Celular Tumoral , Proliferação de Células , Proteína Potenciadora do Homólogo 2 de Zeste/metabolismo , Transição Epitelial-Mesenquimal/genética , Humanos , Masculino , Pessoa de Meia-Idade , Gradação de Tumores , Estadiamento de Neoplasias , Neoplasias da Próstata/metabolismoRESUMO
BACKGROUND AND AIMS: The prevalence of recurrent miscarriage (RM) is about 1-3% of women; the pathogenesis of RM is not fully understood yet. This study aims to assess the sperm antigen specific regulatory T cells (Treg) in women with RM. METHODS: A group of women with RM was recruited into this study. The sperm antigen was extracted from the semen samples of each woman's husband. The sperm antigen specific T cell response was assessed by flow cytometry. RESULTS: Low frequency of sperm specific Tregs and high frequency of T helper (Th)1 cells were detected in RM women as compared with women without RM. The sperm specific Tregs in RM women expressed less Ubc13. Knockdown of Ubc13 from Tregs converted the Tregs to effector T cells. CONCLUSIONS: Immune deregulation may play an important role in RM.