Search results for "Caspase-9"
showing 10 items of 13 documents
Inhibitory Effect of Kurarinone on Growth of Human Non-small Cell Lung Cancer: An Experimental Study Both in Vitro and in Vivo Studies
2018
Kurarinone, a flavonoid isolated from Sophora flavescens Aiton, has been reported to have significant antitumor activity. However, the cytotoxic activity of kurarinone against non-small cell lung cancer (NSCLC) cells is still under explored. In our study, we have evaluated the inhibitory effects of kurarinone on the growth of NSCLC both in vivo and in vitro as well as the molecular mechanisms underlying kurarinone-induced A549 cell apoptosis. The results showed that kurarinone effectively inhibited the proliferation of A549 cells with little toxic effects on human bronchial epithelial cell line BEAS-2B. FASC examination and Hoechst 33258 staining assay showed that kurarinone dose-dependentl…
Rapid generation of hydrogen peroxide contributes to the complex cell death induction by the angucycline antibiotic landomycin E
2017
Landomycin E (LE) is an angucycline antibiotic produced by Streptomyces globisporus. Previously, we have shown a broad anticancer activity of LE which is, in contrast to the structurally related and clinically used anthracycline doxorubicin (Dx), only mildly affected by multidrug resistance-mediated drug efflux. In the present study, cellular and molecular mechanisms underlying the anticancer activity of landomycin E towards Jurkat T-cell leukemia cells were dissected focusing on the involvement of radical oxygen species (ROS). LE-induced apoptosis distinctly differed in several aspects from the one induced by Dx. Rapid generation of both extracellular and cell-derived hydrogen peroxide alr…
Detection of mitochondrial electron chain carrier redox status by transhepatic light intensity during rat liver reperfusion.
2003
The aim of the study was to investigate mitochondrial electron transfer during rat liver reperfusion after cold storage and hypothermic machine perfusion. Livers from male Brown Norway rats were preserved (UW) for 10h either by cold storage (CS) or by hypothermic oxygenated perfusion extracorporal (HOPE). Transhepatic photometric analysis allowed determination of the redox status of mitochondrial cytochromes during preservation, rewarming and reperfusion. Mitochondrial electron chain carriers were inhibited at different sites with rotenone and cyanide in some experiments. reversed transcriptional polymerase chain reaction (RT-PCR) was performed after reperfusion concerning transcription of …
Smac induces cytochrome c release and apoptosis independently from Bax/Bcl-xL in a strictly caspase-3-dependent manner in human carcinoma cells
2004
The mitochondrial apoptosis pathway mediates cell death through the release of various pro-apoptotic factors including cytochrome c and Smac, the second mitochondrial activator of caspases, into the cytosol. Smac was shown previously to inhibit IAP proteins and to facilitate initiation of the caspase cascade upon cytochrome c release. To investigate Smac function during apoptosis and to explore Smac as an experimental cancer therapeutic, we constructed an expression system based on a single adenoviral vector containing Smac under control of the Tet-off system supplied in cis. Conditional expression of Smac induced apoptosis in human HCT116 and DU145 carcinoma cells regardless of the loss of…
Immunohistochemical expression of apoptotic factors, cytokeratins, and metalloproteinase-9 in periapical and epithelialized gingival lesions
2012
Bellmann K, 2010, CELL STRESS CHAPERON, V15, P101, DOI 10.1007-s12192-009-0126-9; Cappello Francesco, 2011, Front Biosci (Schol Ed), V3, P341, DOI 10.2741-s155; Cappello F, 2006, CANCER, V107, P2417, DOI 10.1002-cncr.22265; Cappello F, 2002, EUR J HISTOCHEM, V46, P199; Carneiro E, 2009, ORAL SURG ORAL MED O, V107, P127, DOI 10.1016-j.tripleo.2008.07.030; Chandra D, 2007, J BIOL CHEM, V282, P31289, DOI 10.1074-jbc.M702777200; Fujita Y, 2011, ODONTOLOGY, V100, P215; Garcia Celia Carrillo, 2007, Med Oral Patol Oral Cir Bucal, V12, pE585; Garcia CC, 2009, ORAL SURG ORAL MED O, V107, pE43, DOI 10.1016-j.tripleo.2008.12.002; Gregory CD, 2011, J PATHOL, V223, P177, DOI 10.1002-path.2792; Gupta S, …
Does the orthodontic treatment induces dental pulp cellular death? Caspase-3 and-9, HSP60 and TUNEL expression
2011
Objective: To evaluate the hypothesis of human dental pulp cell death during orthodontic treatement (O.T) and the degree of apoptosis through the expression level of the proteins Caspase-3,-9, TUNEL and HSP60. Materials and methods: Human dental Pulp were coming from both male and female patients (N=20; age 10-14years). The technique used was the Straight Wire, which involves Nickel-Titanium or Steel archwires. The increase of pressure applied on teeth was gradual. Some patients were subjected to a premolar extraction after 3 months treatment, and others after 6 months. Samples were Bouin-fixed, paraffin-embedded and afterwards processed for immunohistochemistry using anti-caspase-3,-9 anti…
Immunohistochemical expression and distribution of orexin, orphanin and leptin in the major salivary glands of some mammals
2012
Abstract: The aim of the study was to assess the involvement of apoptotic factors, cytokeratins and metalloproteinase- 9 in the histogenesis of both Epithelialized Gingival Lesions (EGL) and Periapical Lesions (PAL). 55 consecutive patients, 30 with PAL and 25 with EGL, were selected for the study after clinical and radiological examinations. The PAL patients had severe periapical lesions and tooth decay with exposure of the pulp chamber. All PAL and EGL biopsies were surgically extracted, fixed in 10% buffered formalin, and processed for routine light microscopy. Ten biopsies of each category were processed for immunohistochemistry (IHC). Serial paraffin sections were stained by IHC with a…
A possible biomarker for methadone related deaths
2017
Abstract Methadone (MTH) concentrations in those dying of MTH toxicity totally overlap concentrations where the presence of MTH is only an incidental finding, making it very difficult to make distinctions in actual cases. A biomarker, be it anatomical or biochemical for MTH toxicity is badly needed, particularly if that markers were known to disrupt effective ventilation. Because the brainstem houses the regulatory centers for cardiorespiratory-control enters, it would seem to be the most likely anatomical site to seek abnormalities in cardiorespiratory control. Objective To locate and describe the cells of nucleus of the solitary tract (TS)(NTS) in human brainstem and determine if neuronal…
Caspase 9 and Caspase 3 Immunohistochemical Pattern in Skeletal and Cardiac Muscles at Different Times after Death: An Experimental Study on PMI Esti…
2021
(1) Background: The estimation of the post mortem interval (PMI) is a challenge for forensic pathologists because data emerging from methods commonly applied are not always conclusive, since several conditions exist that may affect the reliability of these parameters. Thus, new approaches have been proposed to overcome such a limit. In recent years, several studies have been performed on proteins analyzing their expression/degradation patterns in relation to the progressing of the post mortem interval. (2) Methods: The immunoreactivity patterns of two apoptosis mediators—Caspase 9 and Caspase 3—have been tested in order to evaluate their potential role as markers of the post mortem interval…
Expression of β-Endorphin and Caspase-9 in Orthodontically Treated Dental Pulp.
2009
Introduction. For several years, our histology laboratory has worked in co-operation with the Winchmore Hill Dental Practice studying the activity of Acetylcholinesterase and some neuropeptides (CGRP, Sub. P, Enkephalins, Endorphins)(1) in orthodontic treated human dental pulp to clarify force's action. It seems that recent data do not yet, fully elucidate the exact effects of the force applied on teeth. For this reason we are investigating whether the traction is involved in some cases of pulpal death. In this study we focused on the expression of Caspase-9 and β-Endorphine. Materials and Methods. The expression of the 2 peptides has been identified through immunohistochemistry assay: not …