scholarly journals MC-LR Exposure Leads to Subfertility of Female Mice and Induces Oxidative Stress in Granulosa Cells

Toxins ◽  
2015 ◽  
Vol 7 (12) ◽  
pp. 5212-5223 ◽  
Author(s):  
Jiang Wu ◽  
Mingming Yuan ◽  
Yuefeng Song ◽  
Feng Sun ◽  
Xiaodong Han
Keyword(s):  
Oxidative Stress ◽  
Granulosa Cells ◽  
Female Mice

scholarly journals NRF2-mediated signaling is a master regulator of transcription factors in bovine granulosa cells under oxidative stress condition

2021 ◽  
Author(s):  
Mohamed Omar Taqi ◽  
Mohammed Saeed-Zidane ◽  
Samuel Gebremedhn ◽  
Dessie Salilew-Wondim ◽  
Ernst Tholen ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Cell Proliferation ◽  
Endoplasmic Reticulum ◽  
Transcription Factors ◽  
Endoplasmic Reticulum Stress ◽  
Granulosa Cells ◽  
Mitochondrial Activity ◽  
Small Interference Rna ◽  
Nrf2 Signaling Pathway

AbstractTranscription factors (TFs) are known to be involved in regulating the expression of several classes of genes during folliculogenesis. However, the regulatory role of TFs during oxidative stress (OS) is not fully understood. The current study was aimed to investigate the regulation of the TFs in bovine granulosa cells (bGCs) during exposure to OS induced by H2O2 in vitro. For this, bGCs derived from ovarian follicles were cultured in vitro till their confluency and then treated with H2O2 for 40 min. Twenty-four hours later, cells were subjected to various phenotypic and gene expression analyses for genes related to TFs, endoplasmic reticulum stress, apoptosis, cell proliferation, and differentiation markers. The bGCs exhibited higher reactive oxygen species accumulation, DNA fragmentation, and endoplasmic reticulum stress accompanied by reduction of mitochondrial activity after exposure to OS. In addition, higher lipid accumulation and lower cell proliferation were noticed in H2O2-challenged cells. The mRNA level of TFs including NRF2, E2F1, KLF6, KLF9, FOS, SREBF1, SREBF2, and NOTCH1 was increased in H2O2-treated cells compared with non-treated controls. However, the expression level of KLF4 and its downstream gene, CCNB1, were downregulated in the H2O2-challenged group. Moreover, targeted inhibition of NRF2 using small interference RNA resulted in reduced expression of KLF9, FOS, SREBF2, and NOTCH1 genes, while the expression of KLF4 was upregulated. Taken together, bovine granulosa cells exposed to OS exhibited differential expression of various transcription factors, which are mediated by the NRF2 signaling pathway.

P–229 Oxidative stress and Metformin; an in-vitro study on serum and primary human granulosa cell cultures

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
F Alam ◽  
R Rehman ◽  
N Farooqui ◽  
F Jehan ◽  
S H Abidi
Keyword(s):  
Oxidative Stress ◽  
Sample Size ◽  
Granulosa Cell ◽  
Cell Cultures ◽  
Granulosa Cells ◽  
Metformin Treatment ◽  
Serum Samples ◽  
Human Granulosa Cells ◽  
Human Granulosa Cell ◽  
Infertile Patients

Abstract Study question What is the effect of administration of Metformin on the oxidative stress (OS) levels in serum and primary human granulosa cell cultures of infertile females? Summary answer Metformin suppresses oxidative stress in serum and human granulosa cells and increases the expression of SIRT1 in OS induced environment. What is known already Oxidative stress (OS) is a resultant of mitochondrial dysfunction when it either fails to fight against the oxidants or the expression of the antioxidants is not sufficient. Cellular damage including DNA damage is a common resultant of oxidative stress. OS effects the oocyte maturation and moreover, the cleavage phase in the early embryonic stage. The raised levels of OS makers are hypothesized to compromise the nuclear maturation and the mitotic spindles of the maturing oocytes. Metformin seemed to decrease oxidative stress and improve insulin resistance, dyslipidaemia and endothelial dysfunction in PCOS patients Study design, size, duration This cross-sectional study was conducted from August 2017 – July 2019, at Aga Khan Hospital in collaboration with Australian Concept Infertility Medical Centre (ACIMC) on ten infertile patients undergoing egg retrieval after ethical approval from of Aga Khan Hospital (AKU-ERC–2018–0557–601). Participants/materials, setting, methods Serum samples were obtained and analysed. Follicular fluid of these subjects was collected for establishment of primary cell culture model of normal human granulosa cells (hGCs). Serum and hGC cultures were grouped as; a) control: treatment, b) Test1: H2O2 induced OS, and c) Test2: H2O2 induced OS treated with metformin. OS was estimated in all groups by Mishra method. The two Test groups were assessed for SIRT1 levels using quantitative PCR employing SIRT1 specific primers Main results and the role of chance With mean age of 32.04 ± 2.29 years the mean BMI was 27.61 ± 2.15 kg/m2. OS was induced and measured by an increase in optical density (OD) in hGC Test samples which showed 0.28 (0.16–0.40) OD when compared with control hGC samples 0.153 (0.09–0.23). There was a significant reduction in ODs after metformin treatment in the stress induced cells 0.182 (0.05–0.30). A similar pattern was observed in the serum samples in ODs; control: 0.105 (0.09–0.15), stress induced samples: 0.199 (0.19–0.20). and stress induced serum sample with metformin treatment: 0.1415 (0.06–0.18). The Ct values obtained to express the effect of metformin on SIRT1 levels, for OS induced (Test1) and OS induced metformin treated (Test2) cells were found to be 29.12 and 26.42, respectively. We also observed a significant (85%) difference in the fold change of SIRT1 expression between metformin treated and untreated cells. Limitations, reasons for caution Small sample size is the limitation of this study. The impact of metformin on cell cultures due to different causes of infertility could not be ascertained Wider implications of the findings: Metformin suppresses oxidative stress in serum and human granulosa cells and increases the expression of SIRT1 in OS induced environment, therefore, metformin may be considered as a treatment of oxidative stress in infertile patients. Randomized control trial with large sample size is recommended to confirm the cause and effect relationship. Trial registration number Not applicable

scholarly journals Protective Effect of L-carnitine on the Oxidative Stress Injury of Human Ovarian Granulosa Cells

2021 ◽  
Author(s):  
Xuening Li ◽  
Xiaodong Wu ◽  
Yuemin Zhang ◽  
Tianyi Ma ◽  
Pingping Sun ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Protective Effect ◽  
Cell Viability ◽  
Granulosa Cells ◽  
Blank Group ◽  
Stress Injury ◽  
Ovarian Granulosa Cells ◽  
Nuclear Pyknosis ◽  
Mda Content

Abstract The protective effect of L-carnitine (LC) on the oxidative stress (OS) injury and the effect of L-carnitine on follicular stimulating hormone receptor (FSHR) of ovarian granulosa cells (GCs) were investigated. OS was induced by treatment with H2O2. We cultured KGN cells in four groups: the blank group, OS group and two L-carnitine pretreatment group (low, high). In the OS group, cell nuclear pyknosis was observed, mitochondria swelled irregularly and their cristae were fractured. Meanwhile, the cell viability, superoxide dismutase (SOD) and glutathione (GSH) contents, mitochondrial membrane potential (ΔΨm) and the level of FSHR expression were significantly decreased in the OS group. However, malonaldehyde (MDA) content, reactive oxygen species (ROS) level and apoptosis rate were significantly increased. Compared with the OS group, the morphology of cells and mitochondria in the L-carnitine pretreatment group were improved, the cell viability and the expression of FSHR was significantly increased, and the OS level was decreased. These results indicated that L-carnitine can protect the cells from OS damage induced by H2O2, enhance the antioxidant and anti-apoptotic ability of GCs, and alleviate the decrease of FSHR expression on GCs caused by OS. Therefore, L-carnitine may help prevent the ovarian aging and improve the quality of follicles.

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.

scholarly journals SOD2 deficiency-induced oxidative stress attenuates steroidogenesis in mouse ovarian granulosa cells

2021 ◽  
Vol 519 ◽  
pp. 110888
Author(s):  
Syed Kashif Zaidi ◽  
Wen-Jun Shen ◽  
Yuan Cortez ◽  
Stefanie Bittner ◽  
Alex Bittner ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Granulosa Cells ◽  
Ovarian Granulosa Cells

scholarly journals Di-(2-ethylhexyl) phthalate (DEHP) inhibits steroidogenesis and induces mitochondria-ROS mediated apoptosis in rat ovarian granulosa cells

2019 ◽  
Vol 8 (3) ◽  
pp. 381-394 ◽  
Author(s):  
Anima Tripathi ◽  
Vivek Pandey ◽  
Alakh N. Sahu ◽  
Alok Singh ◽  
Pawan K. Dubey
Keyword(s):  
Oxidative Stress ◽  
Granulosa Cell ◽  
Granulosa Cells ◽  
Ovarian Granulosa Cells ◽  
Ethylhexyl Phthalate

Increased oxidative stress (OS) due to ubiquitous exposure to di-(2-ethylhexyl) phthalate (DEHP) can affect the quality of oocytes by inducing apoptosis and hampering granulosa cell mediated steroidogenesis.

scholarly journals Endogenous and Exogenous Modulation of Nrf2 Mediated Oxidative Stress Response in Bovine Granulosa Cells: Potential Implication for Ovarian Function

2019 ◽  
Vol 20 (7) ◽  
pp. 1635 ◽  
Author(s):  
Omar Khadrawy ◽  
Samuel Gebremedhn ◽  
Dessie Salilew-Wondim ◽  
Mohamed Taqi ◽  
Christiane Neuhoff ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Antioxidant System ◽  
Granulosa Cells ◽  
Cellular Proliferation ◽  
Ovarian Function ◽  
Defense Mechanism ◽  
Protective Role ◽  
Mitochondrial Activity ◽  
Antioxidant Genes ◽  
Potential Implication

Nrf2 is a redox sensitive transcription factor regulating the expression of antioxidant genes as defense mechanism against various stressors. The aim of this study is to investigate the potential role of noncoding miRNAs as endogenous and quercetin as exogenous regulators of Nrf2 pathway in bovine granulosa cells. For this cultured granulosa cells were used for modulation of miRNAs (miR-28, 153 and miR-708) targeting the bovine Nrf2 and supplementation of quercentin to investigate the regulatory mechanisms of the Nrf2 antioxidant system. Moreover, cultured cells were treated with hydrogen peroxide to induce oxidative stress in those cells. Our results showed that, oxidative stress activated the expression of Nrf2 as a defense mechanism, while suppressing the expression of those miRNAs. Overexpression of those miRNAs resulted in downregulation of Nrf2 expression resulted in higher ROS accumulation, reduced mitochondrial activity and cellular proliferation. Quercetin supplementation showed its protective role against oxidative stress induced by H2O2 by inducing the expression of antioxidant enzymes. In conclusion, this study highlighted the involvement of miR-153, miR-28 and miR-708 in regulatory network of Nrf2 mediated antioxidant system in bovine granulosa cells function. Furthermore, quercetin at a low dose played a protective role in bovine granulosa cells against oxidative stress damage.

Presence of encircling granulosa cells protects against oxidative stress-induced apoptosis in rat eggs cultured in vitro

APOPTOSIS ◽  
2016 ◽  
Vol 22 (1) ◽  
pp. 98-107 ◽  
Author(s):  
Meenakshi Tiwari ◽  
Anima Tripathi ◽  
Shail K. Chaube
Keyword(s):  
Oxidative Stress ◽  
Granulosa Cells ◽  
Rat Eggs ◽  
Induced Apoptosis
Sign in / Sign up

Export Citation Format

Share Document