Oxidative stress in cells exposed to low levels of ionizing radiation

2001 ◽  
Vol 29 (2) ◽  
pp. 350-353 ◽  
Author(s):  
F. M. Lyng ◽  
C. B. Seymour ◽  
C. Mothersill
Keyword(s):  
Oxidative Stress ◽  
Reactive Oxygen Species ◽  
Membrane Potential ◽  
Intracellular Calcium ◽  
Mitochondrial Membrane Potential ◽  
Mitochondrial Membrane ◽  
Reactive Oxygen ◽  
Human Keratinocytes ◽  
Oxygen Species ◽  
Significant Difference

The ability of medium from γ-irradiated cells to induce early events in the apoptotic cascade, such as the mobilization of intracellular calcium, loss of mitochondrial membrane potential and increased levels of reactive oxygen species, in unirradiated cells was investigated. Medium from irradiated human keratinocytes was harvested and transferred to unirradiated keratinocytes. Intracellular calcium levels, mitochondrial membrane potential and the level of reactive oxygen species were all monitored for a period of 24 h following medium transfer. Rapid calcium fluxes (within 30 s), loss of mitochondrial membrane potential and increases in reactive oxygen species (from 6 h after medium transfer) were observed. There was no significant difference between the effects of medium generated by cells irradiated at 0.5 Gy or 5 Gy. The data suggest that a signal that leads to apoptosis is released from cells undergoing radiation-induced oxidative stress.

Contrasting Role of Concentration in Rivaroxaban Induced Toxicity and Oxidative Stress in Isolated Kidney Mitochondria

Drug Research ◽  
2019 ◽  
Vol 69 (10) ◽  
pp. 523-527
Author(s):  
Fatemeh Samiei ◽  
Hanieh Sajjadi ◽  
Akram Jamshidzadeh ◽  
Enayatollah Seydi ◽  
Jalal Pourahmad
Keyword(s):  
Oxidative Stress ◽  
Reactive Oxygen Species ◽  
Membrane Potential ◽  
Cytochrome C ◽  
Mitochondrial Membrane Potential ◽  
Mitochondrial Membrane ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Cytochrome C Release ◽  
Rat Kidneys

AbstractRivaroxaban as a small molecule is able to directly and reversibly inhibit the factor Xa. This study was designed to figure out the evaluation effect of rivaroxaban on mitochondria obtained from rat kidneys. We isolated mitochondria from rat kidneys using gradient centrifugation. Then, the toxicity parameters including succinate dehydrogenase (SDH) activity, reactive oxygen species (ROS) formation, mitochondrial swelling, mitochondrial membrane potential (MMP) collapse and cytochrome c release were measured in kidneys mitochondria following the exposure to rivaroxaban. The results showed that rivaroxaban (1.4 and 2.8 mM) raised the reactive oxygen species (ROS) generation, swelling in the mitochondria, collapse in the mitochondrial membrane potential (MMP) and cytochrome c release in the mitochondria isolated from kidneys. While, rivaroxaban at a higher concentration of 5.6 mM showed the opposite effect compared to other lower concentrations. The results indicate that rivaroxaban may have antioxidant effects at high concentrations. The results suggest that rivaroxaban (5.6 mM) has protective effects against oxidative stress and mitochondrial toxicity.

Reserpine Induces Apoptosis and Cell Cycle Arrest in Hormone Independent Prostate Cancer Cells through Mitochondrial Membrane Potential Failure

2019 ◽  
Vol 18 (9) ◽  
pp. 1313-1322 ◽  
Author(s):  
Manjula Devi Ramamoorthy ◽  
Ashok Kumar ◽  
Mahesh Ayyavu ◽  
Kannan Narayanan Dhiraviam
Keyword(s):  
Prostate Cancer ◽  
Reactive Oxygen Species ◽  
Cell Cycle ◽  
Membrane Potential ◽  
Cancer Cells ◽  
Mitochondrial Membrane Potential ◽  
Mitochondrial Membrane ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Prostate Cancer Cells

Background: Reserpine, an indole alkaloid commonly used for hypertension, is found in the roots of Rauwolfia serpentina. Although the root extract has been used for the treatment of cancer, the molecular mechanism of its anti-cancer activity on hormonal independent prostate cancer remains elusive. Methods: we evaluated the cytotoxicity of reserpine and other indole alkaloids, yohimbine and ajmaline on Prostate Cancer cells (PC3) using MTT assay. We investigated the mechanism of apoptosis using a combination of techniques including acridine orange/ethidium bromide staining, high content imaging of Annexin V-FITC staining, flow cytometric quantification of the mitochondrial membrane potential and Reactive Oxygen Species (ROS) and cell cycle analysis. Results: Our results indicate that reserpine inhibits DNA synthesis by arresting the cells at the G2 phase and showed all standard sequential features of apoptosis including, destabilization of mitochondrial membrane potential, reduced production of reactive oxygen species and DNA ladder formation. Our in silico analysis further confirmed that indeed reserpine docks to the catalytic cleft of anti-apoptotic proteins substantiating our results. Conclusion: Collectively, our findings suggest that reserpine can be a novel therapeutic agent for the treatment of androgen-independent prostate cancer.

Supplementation of kaempferol to in vitro maturation medium regulates oxidative stress and enhances subsequent embryonic development in vitro

Zygote ◽  
2019 ◽  
Vol 28 (1) ◽  
pp. 59-64
Author(s):  
Yuhan Zhao ◽  
Yongnan Xu ◽  
Yinghua Li ◽  
Qingguo Jin ◽  
Jingyu Sun ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Reactive Oxygen Species ◽  
Membrane Potential ◽  
Mitochondrial Membrane Potential ◽  
Mitochondrial Membrane ◽  
Caspase 3 ◽  
Treated Group ◽  
Control Group ◽  
Oxygen Species

SummaryKaempferol (KAE) is one of the most common dietary flavonols possessing biological activities such as anticancer, anti-inflammatory and antioxidant effects. Although previous studies have reported the biological activity of KAE on a variety of cells, it is not clear whether KAE plays a similar role in oocyte and embryo in vitro culture systems. This study investigated the effect of KAE addition to in vitro maturation on the antioxidant capacity of embryos in porcine oocytes after parthenogenetic activation. The effects of kaempferol on oocyte quality in porcine oocytes were studied based on the expression of related genes, reactive oxygen species, glutathione and mitochondrial membrane potential as criteria. The rate of blastocyst formation was significantly higher in oocytes treated with 0.1 µm KAE than in control oocytes. The mRNA level of the apoptosis-related gene Caspase-3 was significantly lower in the blastocysts derived from KAE-treated oocytes than in the control group and the mRNA expression of the embryo development-related genes COX2 and SOX2 was significantly increased in the KAE-treated group compared with that in the control group. Furthermore, the level of intracellular reactive oxygen species was significantly decreased and that of glutathione was significantly increased after KAE treatment. Mitochondrial membrane potential (ΔΨm) was increased and the activity of Caspase-3 was significantly decreased in the KAE-treated group compared with that in the control group. Taken together, these results suggested that KAE is beneficial for the improvement of embryo development by inhibiting oxidative stress in porcine oocytes.

scholarly journals Nisin induces apoptosis in cervical cancer cells via reactive oxygen species generation and mitochondrial membrane potential changes

2022 ◽  
Author(s):  
Houri Sadri ◽  
Mahmoud Aghaei ◽  
Vajihe Akbari
Keyword(s):  
Reactive Oxygen Species ◽  
Cervical Cancer ◽  
Membrane Potential ◽  
Cancer Cells ◽  
Mitochondrial Membrane Potential ◽  
Mtt Assay ◽  
Mitochondrial Membrane ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Cervical Cancer Cells

Nisin, an antimicrobial peptide produced by Lactococcus lactis, is widely used as a safe food preservative and has been recently attracting the attention of many researchers as a potential anticancer agent. The cytotoxicity of nisin against HeLa, OVCAR-3, SK-OV-3, and HUVEC cells was evaluated using MTT assay. The apoptotic effect of nisin was identified by Annexin-V/propidium iodide assay, and then it was further confirmed by western blotting analysis, mitochondrial membrane potential (ΔΨm) analysis, and reactive oxygen species (ROS) assay. The MTT assay showed concentration-dependent cytotoxicity of nisin towards cancer cell lines, with the IC50 values of 11.5-23 µM, but less toxicity against normal endothelial cells. Furthermore, treatment of cervical cancer cells with 12 µM nisin significantly (P<0.05) increased the Bax/Bcl-2 ratio (4.9-fold), reduced ΔΨm (70%), and elevated ROS levels (1.7-fold). These findings indicated that nisin might have anticancer and apoptogenic activities through mitochondrial dysfunction and oxidative stress damage in cervical cancer cells.

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