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Registros recuperados: 6
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Anticancer and apoptosis-inducing activities of microbial metabolites Electron. J. Biotechnol.
Phonnok,Sirinet; Uthaisang-Tanechpongtamb,Wanlaya; Wongsatayanon,Benjamas Thanomsub.
The problems of systemic toxicity and drug resistance in cancer chemotherapy urge the continuing discovery of new anticancer agents. We explored the specific anticancer activity from microbial metabolites to find new lead compound. 394 microbial extracts were evaluated on anti-proliferative activity against 4 cancer cell lines using MTT assay. Of these, 20 samples showed varying degree of cytotoxicity but specifically to the cancer cell lines since the growth of normal cells was not significantly inhibited by 1 mg/ml of each cell extracts. The 4 most potent extracts exhibited strongest growth inhibition to each cancer cell type were selected for further studied. Cell morphological changes such as cell shrinkage, lose of surface contact and blebbing were...
Tipo: Journal article Palavras-chave: Anticancer; Apoptosis; Bioactive compound; Caspase; Microbial product.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000500001
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Butyrate induces apoptosis in murine macrophages via caspase-3, but independent of autocrine synthesis of tumor necrosis factor and nitric oxide BJMBR
Ramos,M.G.; Rabelo,F.L.A.; Duarte,T.; Gazzinelli,R.T.; Alvarez-Leite,J.I..
We demonstrated that 4 mM butyrate induces apoptosis in murine peritoneal macrophages in a dose- and time-dependent manner as indicated by studies of cell viability, flow cytometric analysis of annexin-V binding, DNA ladder pattern and the determination of hypodiploid DNA content. The activity of caspase-3 was enhanced during macrophage apoptosis induced by butyrate and the caspase inhibitor z-VAD-FMK (100 µM) inhibited the butyrate effect, indicating the major role of the caspase cascade in the process. The levels of butyrate-induced apoptosis in macrophages were enhanced by co-treatment with 1 µg/ml bacterial lipopolysaccharide (LPS). However, our data indicate that apoptosis induced by butyrate and LPS involves different mechanisms. Thus, LPS-induced...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Butyrate; Apoptosis; Caspase; Nitric oxide; Cytokine; Macrophage.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000200004
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Low concentrations of doxycycline attenuates FasL-induced apoptosis in HeLa cells Biol. Res.
Yoon,Jung Mi; Koppula,Sushruta; Huh,Se Jong; Hur,Sun Jin; Kim,Chan Gil.
BACKGROUND: Doxycycline (DC) has been shown to possess non-antibiotic properties including Fas/Fas Ligand (FasL)-mediated apoptosis against several tumor types in the concentration range of 10-40 &#956;g/mL. However, the effect of DC in apoptotic signaling at much low concentrations was not studied. METHODS: The present study investigated the attenuation effect of low dose of DC on FasL-induced apoptosis in HeLa cell by the methods of MTT assay, fluorescence microscopy, DNA fragmentation, flow cytometry analysis, and western blotting. RESULTS AND CONCLUSION: In the present findings we showed that low concentration of DC (<2.0 &#956;g/mL) exhibited protective effects against FasL-induced apoptosis in HeLa cells. FasL treatment to HeLa cells...
Tipo: Journal article Palavras-chave: Apoptosis; Caspase; Cisplatin; FasL; Hydrogen peroxide; Tetracycline.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100038
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Mechanistic effect of the human GJB6 gene and its mutations in HaCaT cell proliferation and apoptosis BJMBR
Lu,Yuting; Zhang,Ruili; Wang,Zhenying; Zhou,Shuhua; Song,Yali; Chen,Lamei; Chen,Nan; Liu,Wenmin; Ji,Canan; Wu,Wangli; Zhang,Li.
We constructed lentiviral vectors containing the human wild-type GJB6 gene and the mutant variants A88V and G11R. The three proteins were stably expressed by the Tet-on system in the HaCaT cell line and used to study the functional effect of the variants. The CCK-8 assay and flow cytometric analyses were used to determine the levels of cell proliferation and apoptosis. Western blot analyses were performed to analyze the relevant clinical indicators of hidrotic ectodermal dysplasia and markers of apoptosis in transfected HaCaT cells. The CCK8 assay and the flow cytometry results showed a significant increase (P<0.05) in the apoptosis of HaCaT cells expressing the A88V and G11R mutants. In addition, we demonstrated that the A88V and G11R mutants induced...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Clouston syndrome; GJB6 gene; Connexin 30; Caspase; Apoptosis.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000900611
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Propylthiouracil-induced hypothyroidism delays apoptosis during the first wave of spermatogenesis Biol. Res.
Silva,Doris; Lizama,Carlos; Tapia,Verónica; Moreno,Ricardo D.
Mammalian germ cell apoptosis plays a key role in controlling the correct number of germ cells supported by Sertoli cells during the first wave of spermatogenesis in mammalian puberty. However, little is known about hormonal factors that could influence the rate of germ cell apoptosis during puberty or adulthood. In this work we evaluate germ cell apoptosis under hypothyroidism induced by goitrogen propylthiouracil (PTU) during the first wave of spermatogenesis. Neonatally administered PTU promoted a delay in the differentiation of Sertoli cells as evaluated by the expression of clusterin using immunohistochemistry and RT-PCR. Clusterin had different expression levels in control and PTU-treated animals, but under both conditions the highest levels were...
Tipo: Journal article Palavras-chave: Testis; Spermatocyte; Sertoli cell; Caspase; Apoptosis; Thyroid.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000200010
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The regulation of apoptotic cell death BJMBR
Amarante-Mendes,G.P.; Green,D.R..
Apoptosis is a fundamental biological phenomenon in which the death of a cell is genetically and biochemically regulated. Different molecules are involved in the regulation of the apoptotic process. Death receptors, coupled to distinct members of the caspases as well as other adapter molecules, are involved in the initiation of the stress signals (The Indictment). Members of the Bcl-2 family control at the mitochondrial level the decision between life and death (The Judgement). The effector caspases are responsible for all morphological and biochemical changes related to apoptosis including the "eat-me" signals perceived by phagocytes and neighboring cells (The Execution). Finally, apoptosis would have little biological significance without the recognition...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Apoptosis; Cell death; Caspase; Mitochondria; Bcl-2; Oncogene.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000900001
Registros recuperados: 6
Primeira ... 1 ... Última
 

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