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Yi Y, Gao K, Lin P, Chen H, Zhou D, Tang K, Wang A, Jin Y. Staphylococcus aureus-Induced Necroptosis Promotes Mitochondrial Damage in Goat Endometrial Epithelial Cells. Animals (Basel) 2022; 12:ani12172218. [PMID: 36077938 PMCID: PMC9454985 DOI: 10.3390/ani12172218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 08/20/2022] [Accepted: 08/21/2022] [Indexed: 12/02/2022] Open
Abstract
Simple Summary The death of endometrial cells induced by bacterial infections can result in damage to the endometrial function. In this study, we investigated the potential role of necroptosis in Staphylococcus aureus-induced goat endometrial epithelial cell (gEEC) death. We found that S. aureus induced gEECs RIPK1/RIPK3/MLKL-mediated necroptosis, triggered mainly by membrane disruption and ion imbalance. Moreover, gEEC necroptosis contributed to the regulation of reactive oxygen species generation and mitochondrial damage. These provide evidence of the involvement of necroptosis in the S. aureus-induced gEEC death. Abstract Endometrial cell death is induced by bacterial infection, resulting in damage to the physical barriers and immune function. An in-depth understanding of the mechanisms of endometrial epithelial cell necroptosis might provide new insights into the treatment of uterine diseases. In the present study, we investigated the effect of Staphylococcus aureus on goat endometrial epithelial cell (gEEC) necroptosis, and the underlying molecular mechanism. We found that S. aureus induced significant necroptosis in gEECs by increasing the expression of key proteins of the RIPK1/RIPK3/MLKL axis; importantly, this effect was alleviated by inhibitors of RIPK1, RIPK3, and MLKL. Moreover, we found that the main triggers of gEEC necroptosis induced by S. aureus were not the toll-like receptors (TLRs) and tumor necrosis factor receptor (TNFR), but membrane disruption and ion imbalance. Moreover, we observed a significant decrease in the mitochondrial membrane potential, indicating mitochondrial damage, in addition to increased cytochrome c levels and reactive oxygen species (ROS) generation in S. aureus-infected gEECs; these, effects were also suppressed by the inhibitors of RIPK1, RIPK3, and MLKL. Taken together, these data revealed the molecular mechanism of S. aureus-induced gEEC necroptosis and provided potential new targeted therapies for clinical intervention in bacterial infections.
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Affiliation(s)
| | | | | | | | | | | | | | - Yaping Jin
- Correspondence: ; Tel.: +86-29-8709-1802
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Yang H, Fu L, Luo Q, Li L, Zheng F, Wen J, Li C, Luo X, Zhao Z, Xu H. Identification and validation of key miRNAs and miRNA-mRNA regulatory network associated with uterine involution in postpartum Kazakh sheep. Arch Anim Breed 2021; 64:119-129. [PMID: 34084910 PMCID: PMC8131964 DOI: 10.5194/aab-64-119-2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Accepted: 03/17/2021] [Indexed: 12/30/2022] Open
Abstract
MicroRNAs (miRNAs) are widely expressed in different mammalian tissues and
exert their biological effects through corresponding target genes. miRNA
target genes can be rapidly and efficiently identified and screened by
combining bioinformatics prediction and experimental validation. To
investigate the possible molecular regulatory mechanisms involving miRNAs
during uterine involution in postpartum ewes, we used Illumina HiSeq
sequencing technology to screen for the number and characteristics of miRNAs
in faster uterine involution and normal uterine involution group. A total of
118 differentially expressed miRNAs, including 33 known miRNAs and 85 new
miRNAs, were identified in the hypothalamic library, whereas 54 miRNAs,
including 5 known miRNAs and 49 new miRNAs, were identified in the uterine
library. Screening with four types of gene prediction software revealed 73
target genes associated with uterine involution, and subsequently, GO
annotation and KEGG pathway analysis were performed. The results showed
that, in the hypothalamic–uterine axis, uterine involution in postpartum
ewes might primarily involve two miRNA-target gene pairs, namely,
miRNA-200a–PTEN and miRNA-133–FGFR1, which can participate in GnRH signal
transduction in the upstream hypothalamus and in the remodeling process at
the downstream uterus, through the PI3K–AKT signaling pathway to influence
the recovery of the morphology and functions of the uterus during the
postpartum period in sheep. Therefore, identification of differentially
expressed miRNAs in this study fills a gap in the research related to miRNAs
in uterine involution in postpartum ewes and provides an important reference
point for a comprehensive understanding of the molecular mechanisms
underlying the regulation of postpartum uterine involution in female
livestock.
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Affiliation(s)
- Heng Yang
- College of Veterinary Medicine, Southwest University, Rongchang 402460, Chongqing, China.,Immunology Research Center, Medical Research Institute, Southwest University, Rongchang 402460, Chongqing, China
| | - Lin Fu
- Chongqing Academy of Animal Sciences, Rongchang 402460, Chongqing, China
| | - Qifeng Luo
- College of Veterinary Medicine, Southwest University, Rongchang 402460, Chongqing, China
| | - Licai Li
- College of Veterinary Medicine, Southwest University, Rongchang 402460, Chongqing, China
| | - Fangling Zheng
- College of Veterinary Medicine, Southwest University, Rongchang 402460, Chongqing, China
| | - Jiayu Wen
- College of Veterinary Medicine, Southwest University, Rongchang 402460, Chongqing, China
| | - Chenjing Li
- College of Veterinary Medicine, Southwest University, Rongchang 402460, Chongqing, China
| | - Xingxiu Luo
- College of Veterinary Medicine, Southwest University, Rongchang 402460, Chongqing, China
| | - Zongsheng Zhao
- College of Animal Science and Technology, Shihezi University, Shihezi 832000, Xinjiang, China
| | - Huihao Xu
- College of Veterinary Medicine, Southwest University, Rongchang 402460, Chongqing, China
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Xiao J, Liu S, Yu T, Zhang R, Guo X, Jia Y, Shang C, Wang A, Jin Y, Lin P. UFMylation is associated with LPS-induced inflammatory response in goat endometrial epithelial cells. Reprod Domest Anim 2020; 55:1725-1734. [PMID: 32986296 DOI: 10.1111/rda.13832] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/22/2020] [Indexed: 01/08/2023]
Abstract
The endometrium plays an important role in the defence against invading pathogens, although the mechanisms are not clear. UFMylation is a recently discovered novel ubiquitination-like modification system that plays a pivotal role in inflammation and the immune response. The purpose of this study was to investigate the effects of UFMylation on lipopolysaccharide (LPS)-induced inflammatory responses in immortalized goat endometrial epithelial cells (gEECs). Ubiquitin-fold modifier conjugating enzyme 1 (UFM1) and DDRGK domain containing 1 (DDRGK1) were mainly localized in the luminal epithelium and glandular epithelium of mouse and goat endometrial tissues. The expression levels of UFM1, ubiquitin-like modifier activating enzyme 5 (UBA5), UFM1 specific ligase 1 (UFL1) and DDRGK1, as key components of the UFMylation system, were significantly activated by 5 μg/mL LPS-induced inflammatory response in gEECs for 6 hr. Meanwhile, the expression levels of interleukin-6 (IL-6) were significantly upregulated, and tumour necrosis factor-α (TNF-α) was significantly down-regulated after overexpression of UFM1 in gEECs. Additionally, we observed UFM1 and DDRGK1 were markedly increased on LPS-stimulated mouse endometritis in vivo. In conclusion, the current study demonstrated that UFMylation was significantly activated by LPS and might be involved in regulating inflammatory response in gEECs.
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Affiliation(s)
- Jinbang Xiao
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Shouqin Liu
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Tong Yu
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Ruixue Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Xinyan Guo
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Yanni Jia
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Chunmei Shang
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Aihua Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Yaping Jin
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
| | - Pengfei Lin
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, China
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Heydari S, Eidi A, Kouhkan F, Tvrda E, Mohammadi-Sangcheshmeh A. Effects of increasing lipopolysaccharide concentrations on in vitro developmental competence of ovine oocytes. Anim Reprod 2020; 17:e20190125. [PMID: 32714454 PMCID: PMC7375860 DOI: 10.1590/1984-3143-ar2019-0125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Although a considerable number of studies have investigated the effects of lipopolysaccharide (LPS) on the reproductive performance of dairy cows, the response of ovine oocytes to LPS during their in vitro maturation and development is not well defined yet. Ewe’s ovaries were obtained from a slaughterhouse, the oocytes were collected and matured in the presence of increasing concentrations (0, 0.01, 0.1, 1 and 10 µg/mL) of LPS in order to evaluate the meiotic maturation by measuring the proportion of oocytes reaching the MII stage. The concentration of intracellular glutathione (GSH) was measured in oocytes following maturation in vitro. In addition, concentrations of selected metabolites including glucose, pyruvate, lactate and glutamine were quantified in the medium following maturation. A number of treated matured oocytes along with the control group were subsequently fertilized using frozen semen and assessed for the rate of cleavage and for the proportion reaching the blastocyst stage. The number of oocytes in MII stage was significantly reduced in response to the increasing concentrations of LPS (77.83%, 70.64%, 68.86%, 66.32%, respectively, in case of 0.01, 0.1, 1 and 10 µg/mL LPS when compared to the control group, 76.34%; P<0.05). There were no differences neither in the intracellular concentration of GSH in the oocytes nor in case of the metabolites in the maturation medium. Although the rate of cleaved oocytes was not affected by increasing levels of LPS, the blastocyst rate was reduced in a dose dependent manner (36.69%, 34.21%, 30.35%, 17.27% and 14.03% for the control, 0.01, 0.1, 1 and 10 µg/mL LPS, respectively (P<0.05). These results demonstrate that the developmental competence of ovine oocytes may be affected detrimentally by LPS and such deleterious effects could be related to the maturation process.
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Affiliation(s)
- Sepideh Heydari
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Akram Eidi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Fatemeh Kouhkan
- Department of Molecular Biology and Genetic Engineering, Stem Cell Technology Research Center, Tehran, Iran
| | - Eva Tvrda
- Department of Animal Physiology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Nitra, Slovakia
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Clinical, ultrasonographic, bacteriological, cytological and histological findings during uterine involution in ewes with pregnancy toxaemia and subsequent reproductive efficiency. Anim Reprod Sci 2020; 218:106460. [PMID: 32507269 DOI: 10.1016/j.anireprosci.2020.106460] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 04/01/2020] [Accepted: 04/02/2020] [Indexed: 11/22/2022]
Abstract
Objectives were to evaluate characteristics of uterine involution in ewes with pregnancy toxaemia during gestation and to study effects on subsequent reproductive performance. Pregnancy toxaemia was induced in ewes (A) by feeding an energy-deficient diet as confirmed by detecting β-hydroxybutyrate concentrations in blood indicative of this disorder. There was also a control group (C). Animals were evaluated until the 60th day post-partum using clinical and ultrasonographic examinations. Vaginal swab samples and uterine biopsy tissue samples were collected for bacteriological and cytological examination; biopsy samples were prepared for histological examination. Ewes were subsequently placed with rams and reproductive performance was ascertained. Post-partum, during the ultrasonographic examination of the uterus, ewes of Group A had caruncle and uterine lumen diameters, as well as a uterine thickness greater than ewes of Group C. Post-partum uterine blood flow volume was greater in ewes of the A than C group. Neutrophils predominated in vaginal samples, with the neutrophil proportion being less in ewes of Group A than C. There were no differences in the uterine involution process between groups. During the subsequent reproductive season, all the ewes of Group A lambed normally and produced viable lambs. It is concluded that there were no adverse effects on subsequent reproductive performance of ewes previously affected with pregnancy toxaemia, when appropriate health management was performed.
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