scholarly journals Xiaoyaosan Decoction, a Traditional Chinese Medicine, Inhibits Oxidative-Stress-Induced Hippocampus Neuron Apoptosis In Vitro

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Zhen-zhi Meng ◽  
Jing-hong Hu ◽  
Jia-xu Chen ◽  
Guang-xin Yue
Keyword(s):  
Oxidative Stress ◽  
Membrane Potential ◽  
Mitochondrial Membrane Potential ◽  
Mitochondrial Membrane ◽  
Low Dose ◽  
Free Calcium ◽  
High Dose ◽  
Hippocampus Neuron ◽  
Neuron Apoptosis

Xiaoyaosan (XYS) decoction is a famous prescription for the treatment of mental disorders in China. In this experiment, we explored the way in which XYS decoction-reverse hippocampus neuron apoptosis in vitro. We used XYS decoction-containing serum to treat oxidative-stress-induced hippocampus neuron apoptosis and used immunofluorescence to determine the concentration of free calcium, mitochondrial membrane potential, and apoptotic rate of neuron. Results showed that 3-hour oxidative stress decrease mitochondrial membrane potential, increase the concentration of free calcium and apoptotic rate of neuron via triggering pathological changes of nucleus such as karyorrhexis, karyopyknosis. Low, medium, high dose of XYS-decoction-containing serum could reverse these phenomenon, and the effect of low-dose XYS-decoction-containing serum was significant in improving mitochondrial membrane potential and apoptotic rate of neuron. These findings suggest that XYS decoction may be helpful in reducing oxidative-stress-induced hippocampus neuron apoptosis.

Encircling granulosa cells protects against di-(2-ethylhexyl)phthalate-induced apoptosis in rat oocytes cultured in vitro

Zygote ◽  
2019 ◽  
Vol 27 (4) ◽  
pp. 203-213 ◽  
Author(s):  
Anima Tripathi ◽  
Vivek Pandey ◽  
A.N. Sahu ◽  
Alok K. Singh ◽  
Pawan K. Dubey
Keyword(s):  
Oxidative Stress ◽  
Membrane Potential ◽  
Mitochondrial Membrane Potential ◽  
Granulosa Cells ◽  
Mitochondrial Membrane ◽  
Dependent Manner ◽  
Apoptotic Markers ◽  
Induced Apoptosis ◽  
Ethylhexyl Phthalate

SummaryThe present study investigated if the presence of encircling granulosa cells protected against di(2-ethylhexyl)phthalate (DEHP)-induced oxidative stress in rat oocytes cultured in vitro. Denuded oocytes and cumulus–oocyte complexes (COCs) were treated with or without various doses of DEHP (0.0, 25.0, 50.0, 100, 200, 400 and 800 μM) in vitro. Morphological apoptotic changes, levels of oxidative stress and reactive oxygen species (ROS), mitochondrial membrane potential, and expression levels of apoptotic markers (Bcl2, Bax, cytochrome c) were analyzed. Our results showed that DEHP induced morphological apoptotic changes in a dose-dependent manner in denuded oocytes cultured in vitro. The effective dose of DEHP (400 µg) significantly (P>0.05) increased oxidative stress by elevating ROS levels and the mitochondrial membrane potential with higher mRNA expression and protein levels of apoptotic markers (Bax, cytochrome c). Encircling granulosa cells protected oocytes from DEHP-induced morphological changes, increased oxidative stress and ROS levels, as well as increased expression of apoptotic markers. Taken together our data suggested that encircling granulosa cells protected oocytes against DEHP-induced apoptosis and that the presence of granulosa cells could act positively towards the survival of oocytes under in vitro culture conditions and may be helpful during assisted reproductive technique programmes.

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 Does Cryopreservation of Ovarian Tissue Affect the Distribution and Function of Germinal Vesicle Oocytes Mitochondria?

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Mojdeh Salehnia ◽  
Virpi Töhönen ◽  
Saeed Zavareh ◽  
Jose Inzunza
Keyword(s):  
Membrane Potential ◽  
Mitochondrial Membrane Potential ◽  
Mitochondrial Membrane ◽  
Laser Scanning ◽  
Ovarian Tissue ◽  
Germinal Vesicle ◽  
Free Calcium ◽  
Atp Content ◽  
Fertilization Rates

The aim of this study was to evaluate mitochondrial alteration and ATP content of germinal vesicle (GV) oocytes isolated from fresh and vitrified ovaries. After superovulation, the ovaries from adult mice were collected and divided into control and vitrified groups. GV oocytes were isolated mechanically from each group. Half were cultured for 24 hours and their maturation was assessed. Metaphase II oocytes were collected and submitted toin vitrofertilization and their fertilization rates and development to the blastocyst stage were evaluated. In the remaining GV oocytes, ATP levels were quantified, and mitochondrial distribution, mitochondrial membrane potential, and intracellular free calcium were detected with rhodamine 123, JC-1 and Flou-4 AM staining, using laser-scanning confocal microscopy. Maturation and fertilization rates of GV oocytes and the developmental rates of subsequent embryos were significantly lower in vitrified samples (P<0.05). The ATP content and Ca2+levels differed significantly in fresh and vitrified GV oocytes (P<0.05). Most mitochondria were seen as large and homogenous aggregates (66.6%) in fresh GV oocytes compared to vitrified oocytes (50%). No significant differences in mitochondrial membrane potential were found between the groups. The lower maturation and fertilization rates of GV oocytes from vitrified ovaries may be due to changes in their mitochondrial function and distribution.

scholarly journals Effects of Medical Diagnostic X-rays Delivered at 0.01 or 0.05 mGy on Human Blood Cells

2021 ◽  
Vol 20 (1) ◽  
pp. 136-144
Author(s):  
Benjamaporn Supawat ◽  
Jongchai Tinlapat ◽  
Rusleena Wongmahamad ◽  
Chuleekorn Silpmuang ◽  
Suchart Kothan ◽  
...  
Keyword(s):  
Membrane Potential ◽  
Mitochondrial Membrane Potential ◽  
Blood Cells ◽  
Mitochondrial Membrane ◽  
Low Dose ◽  
Medical Science ◽  
Control Group ◽  
X Rays ◽  
Medical Diagnostic

Background: Low-dose X-rays are commonly used in medical imaging to help in the diagnosis ofdiseases. However, the deleterious effects of exposure to medical diagnostic low-dose X-rays remaina highly debated topic. The objective was to study the effects of medical diagnostic X-rays on humanblood cells. Materials and Methods: We studied the effects of medical diagnostic low-dose X-rays (80kVp), i.e.,0.01 or 0.05 mGy, after the in vitro exposure of human red blood cells (RBCs) and peripheralblood mononucleated cells (PBMCs).Cells with no irradiation served as the control group. The biologicalendpoints that were used to determine the effects of medical diagnostic low-dose X-rays were hemolysisfor RBCs and mitochondrial membrane potential, lysosomes, and the cell cycle for PBMCs. Results: Ourresults showed no changes in the hemolysis of RBCs and mitochondrial membrane potential, lysosome, orcell cycle in cells exposed to these low doses of X-rays when compared to the corresponding nonirradiatedcells at all harvest timepoints. Conclusion: These results suggested that there were no deleterious effectsof diagnostic low-dose X-rays when human RBCs and PBMCs were exposed in vitro. Bangladesh Journal of Medical Science Vol.20(1) 2021 p.136-144

scholarly journals Mitochondrial membrane potential in density-separated trout erythrocytes exposed to oxidative stress in vitro

2001 ◽  
Vol 1505 (2-3) ◽  
pp. 226-237 ◽  
Author(s):  
Luca Tiano ◽  
Donatella Fedeli ◽  
Patrizia Ballarini ◽  
Giorgio Santoni ◽  
Giancarlo Falcioni
Keyword(s):  
Oxidative Stress ◽  
Membrane Potential ◽  
Mitochondrial Membrane Potential ◽  
Mitochondrial Membrane

scholarly journals Geranylgeranyl Acetone Prevents Glutamate-induced Cell Death in HT-22 Cells by Increasing Mitochondrial Membrane Potential

2020 ◽  
Author(s):  
Eriko Sugano ◽  
Yuka Endo ◽  
Akihisa Sugai ◽  
Yuki Kikuchi ◽  
Kitako Tabata ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Cell Death ◽  
Membrane Potential ◽  
Mitochondrial Membrane Potential ◽  
Mitochondrial Membrane ◽  
Oxygen Species ◽  
Mouse Hippocampus ◽  
Calcium Buffering ◽  
Shock Proteins

Geranylgeranyl acetone (GGA) protects against various types of cell damages by upregulating heat shock proteins. We investigated whether GGA protect neuronal cells from cell death induced by oxidative stress. Glutamate exposure was lethal to HT-22 cells which comprise a neuronal line derived from mouse hippocampus. This configuration is often used as a model for hippocampus neurodegeneration in vitro. In the present study, GGA protected HT-22 cells from glutamate-induced oxidative stress. GGA pretreatment did not induce Hsps. Moreover, reactive oxygen species increased to the same extent in both GGA-pretreated and untreated cells exposed to glutamate. In contrast, glutamate exposure and GGA pretreatment increased mitochondrial membrane potential. However, increases in intracellular Ca2+ concentration were inhibited by GGA pretreatment. In addition, the increase of phosphorylated ERKs by the glutamate exposure was inhibited by GGA pretreatment. These findings suggest that GGA protects HT-22 cells from glutamate-provoked cell death without Hsp induction and that the mitochondrial calcium buffering capacity plays an important role in this protective effect.

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