Objective: To evaluate low-molecular-weight (LMW) DNA as possible prognostic biomarker in acute ischemic and hemorrhagic stroke. Methods:  LMW DNA samples were isolated from plasma and cerebrospinal fluid by phenol deproteinization, analyzed by gradient polyacrylamide electrophoresis and quantified by spectrophotometry. Results: Two common types of the stroke, ischemic and hemorrhagic, differ...

Abstract Substantial evidence has shown that overexpression of the inhibitor apoptosis protein (IAP) survivin in human tumors correlates significantly with treatment resistance and poor patient prognosis. Survivin serves as a radiation factor impacts DNA damage response by interacting DNA-dependent kinase (DNA-PKcs). However, complexity, molecular determinants, functional consequences this inte...

Excessive genome damage activates the apoptosis response. Protein kinase HIPK2 is a key regulator of DNA damage-induced apoptosis. Here, we deciphered the molecular mechanism of HIPK2 activation and show its relevance for DNA damage-induced apoptosis in cellulo and in vivo. HIPK2 autointeracts and site-specifically autophosphorylates upon DNA damage at Thr880/Ser882. Autophosphorylation regulat...

Summary Loss of lymphocytes, particularly T cell apoptosis, is a central pathological event after severe tissue injury that associated with increased susceptibility for life-threatening infections. The precise immunological mechanisms leading to death acute are largely unknown. Here, we identified monocyte-T interaction driving bystander cells in ischemic stroke and burn injury. Specif...

Pancreatic cancer is a kind of malignant tumor with high mortality rate. Early operation and late chemoradiotherapy are the treatment criteria, but prognosis still poor. Berberine, an alkaloid compound present in many herbal plants, capable inducing oxidative DNA damage downregulating homologous recombination repair (HRR) cells. Poly (ADP ribose) polymerase-1 (PARP-1) sensor key roles repair. I...

apoptosis or programmed cell death is a gene regulated phenomenon which is important in both physiological and pathological conditions. it is characterized by distinct morphological features including chromatin condensation, cell and nuclear shrinkage, membrane blebbing and oligonucleosomal dna fragmentation. although, two major apoptotic pathways including 1) the death receptor (extrinsic) and...

DNA damage as a result of environmental stress is recognized by sensor proteins that trigger repair mechanisms, or, if repair is unsuccessful, initiate apoptosis. Defects in DNA damage-induced apoptosis promote genomic instability and tumourigenesis. The protein ataxia-telangiectasia mutated (ATM) is activated by DNA double-strand breaks and regulates apoptosis via p53. Here we show that FOXO3 ...

Apoptosis is essential for the maintenance of inherited genomic integrity. During DNA damage-induced apoptosis, mechanisms of cell survival, such as DNA repair are inactivated to allow cell death to proceed. Here, we describe a role for the mammalian DNA repair enzyme Exonuclease 1 (Exo1) in DNA damage-induced apoptosis. Depletion of Exo1 in human fibroblasts, or mouse embryonic fibroblasts led...

  Objective(s): Regarding the presence of many active biological constituents in Avicennia marina, the present investigation was carried out to study cytotoxic activity of crude methanol leave extract and column chromatographic fractions of A. marina against MDA-MB 231 cell line (human breast cancer cell) and HEK (Human embryonic kidney cell) line .   Materials and Methods: The an...

Background: Cutaneous leishmaniasis is a common parasitic disease in Iran being mainly caused by Leishmania (L.) major. The aim of this study was to investigate the occurrence of apoptosis in the spleen and liver of female mice infected with L. major.Methods: BALB/c mice were randomly assigned into the control and experimental groups (ten mice per group). The experimental groups were subcutaneo...