We are analyzing https://link.springer.com/article/10.1007/s10495-014-0984-1.

Title:
Isofraxidin, a potent reactive oxygen species (ROS) scavenger, protects human leukemia cells from radiation-induced apoptosis via ROS/mitochondria pathway in p53-independent manner | Apoptosis
Description:
Ionizing radiation (IR) leads to oxidizing events such as excessive reactive oxygen species (ROS) in the exposed cells, resulting in further oxidative damage to lipids, proteins and DNA. To screen the potential radio-protective drug, the intracellular ROS was measured in irradiated U937 cells pretreated with 80 candidate traditional herbal medicine, respectively. Isofraxidin (IF) was one possible radio-protector in these 80 drugs. This study investigated the radio-protective role of IF, a Coumarin compound, in human leukemia cell lines, for the first time. Results indicate that IF protects against IR-induced apoptosis in U937 cells in the time- and concentration- dependent manner. IF decreases IR-induced intracellular ROS generation, especially hydroxyl radicals formation, inhibits IR-induced mitochondrial membrane potential loss and reduces IR-induced high intracellular Ca2+ levels regardless of ER stress. IF down-regulates the expression of caspase-3, phospho-JNK, phospho-p38 and activates Bax in mitochondria. IF inhibits cytochrome c release from mitochondria to cytosol. IF also moderates IR-induced Fas externalization and caspase-8 activation. IF also exhibits significant protection against IR-induced cell death in other leukemia cell lines such as Molt-4 cells and HL60 cells regardless of p53. Taken together, the data demonstrate that IF protects leukemia cells from radiation-induced apoptosis via ROS/mitochondria pathway in a p53-independent manner.
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Keywords {🔍}

article, pubmed, google, scholar, cas, apoptosis, cell, cells, biol, human, reactive, oxygen, species, stress, death, chem, isofraxidin, ros, zhao, radiation, potential, role, mitochondrial, leukemia, radiationinduced, pathway, oxidative, intracellular, irinduced, mitochondria, int, res, protein, cancer, central, endoplasmic, reticulum, toyama, privacy, cookies, content, research, protects, dna, medicine, caspase, activation, access, induction, lett,

Topics {✒️}

alpha-phenyl-tert-butyl nitrone month download article/chapter stress-activated protein kinase potential radio-protective drug inhibited tnf-α production yu-fei jiao p38 kinase-mediated phosphorylation oxidative stress-mediated erk1/2 ir-induced cell death joint usage/research center gamma-irradiation-induced delay vitamin d-mediated apoptosis vivo anti-radiation activities reactive oxygen species endoplasmic reticulum ca2+ cellular redox state radiation-induced apoptosis article apoptosis aims full article pdf ir-induced apoptosis distinguish specific species stem/progenitor cells endoplasmic reticulum stress li-hua wu prolonged cell injury concentration- dependent manner mitochondrial ca2+ revealed science-based natural medicine fas-mediated apoptosis van blitterswijk wj protects leukemia cells privacy choices/manage cookies oridonin-induced apoptosis leukemia cell lines human hepatoma cells mitochondrial transmembrane potential exhibits significant protection cooperative research project p53-independent manner radio-protective role mitochondria apoptosis pathways related subjects apoptotic cell death protein kinase bcl-2-overexpressing cells human cancer cells promote cell death reactive oxygen tumour cell apoptosis cell-free extract

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         description:Ionizing radiation (IR) leads to oxidizing events such as excessive reactive oxygen species (ROS) in the exposed cells, resulting in further oxidative damage to lipids, proteins and DNA. To screen the potential radio-protective drug, the intracellular ROS was measured in irradiated U937 cells pretreated with 80 candidate traditional herbal medicine, respectively. Isofraxidin (IF) was one possible radio-protector in these 80 drugs. This study investigated the radio-protective role of IF, a Coumarin compound, in human leukemia cell lines, for the first time. Results indicate that IF protects against IR-induced apoptosis in U937 cells in the time- and concentration- dependent manner. IF decreases IR-induced intracellular ROS generation, especially hydroxyl radicals formation, inhibits IR-induced mitochondrial membrane potential loss and reduces IR-induced high intracellular Ca2+ levels regardless of ER stress. IF down-regulates the expression of caspase-3, phospho-JNK, phospho-p38 and activates Bax in mitochondria. IF inhibits cytochrome c release from mitochondria to cytosol. IF also moderates IR-induced Fas externalization and caspase-8 activation. IF also exhibits significant protection against IR-induced cell death in other leukemia cell lines such as Molt-4 cells and HL60 cells regardless of p53. Taken together, the data demonstrate that IF protects leukemia cells from radiation-induced apoptosis via ROS/mitochondria pathway in a p53-independent manner.
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      headline:Isofraxidin, a potent reactive oxygen species (ROS) scavenger, protects human leukemia cells from radiation-induced apoptosis via ROS/mitochondria pathway in p53-independent manner
      description:Ionizing radiation (IR) leads to oxidizing events such as excessive reactive oxygen species (ROS) in the exposed cells, resulting in further oxidative damage to lipids, proteins and DNA. To screen the potential radio-protective drug, the intracellular ROS was measured in irradiated U937 cells pretreated with 80 candidate traditional herbal medicine, respectively. Isofraxidin (IF) was one possible radio-protector in these 80 drugs. This study investigated the radio-protective role of IF, a Coumarin compound, in human leukemia cell lines, for the first time. Results indicate that IF protects against IR-induced apoptosis in U937 cells in the time- and concentration- dependent manner. IF decreases IR-induced intracellular ROS generation, especially hydroxyl radicals formation, inhibits IR-induced mitochondrial membrane potential loss and reduces IR-induced high intracellular Ca2+ levels regardless of ER stress. IF down-regulates the expression of caspase-3, phospho-JNK, phospho-p38 and activates Bax in mitochondria. IF inhibits cytochrome c release from mitochondria to cytosol. IF also moderates IR-induced Fas externalization and caspase-8 activation. IF also exhibits significant protection against IR-induced cell death in other leukemia cell lines such as Molt-4 cells and HL60 cells regardless of p53. Taken together, the data demonstrate that IF protects leukemia cells from radiation-induced apoptosis via ROS/mitochondria pathway in a p53-independent manner.
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