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Qi J, Zhang S, Qu H, Wang Y, Dong Y, Wei H, Wang Y, Sun B, Jiang H, Zhang J, Liang S. Lysine-specific demethylase 1 (LSD1) participate in porcine early embryonic development by regulating cell autophagy and apoptosis through the mTOR signaling pathway. Theriogenology 2024; 224:119-133. [PMID: 38762919 DOI: 10.1016/j.theriogenology.2024.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/28/2024] [Accepted: 05/07/2024] [Indexed: 05/21/2024]
Abstract
Lysine-specific demethylase 1 (LSD1) stands as the pioneering histone demethylase uncovered, proficient in demethylating H3K4me1/2 and H3K9me1/2, thereby governing transcription and participating in cell apoptosis, proliferation, or differentiation. Nevertheless, the complete understanding of LSD1 during porcine early embryonic development and the underlying molecular mechanism remains unclear. Thus, we investigated the mechanism by which LSD1 plays a regulatory role in porcine early embryos. This study revealed that LSD1 inhibition resulted in parthenogenetic activation (PA) and in vitro fertilization (IVF) embryo arrested the development, and decreased blastocyst quality. Meanwhile, H3K4me1/2 and H3K9me1/2 methylase activity was increased at the 4-cell embryo stage. RNA-seq results revealed that autophagy related biological processes were highly enriched through GO and KEGG pathway analyses when LSD1 inhibition. Further studies showed that LSD1 depletion in porcine early embryos resulted in low mTOR and p-mTOR levels and high autophagy and apoptosis levels. The LSD1 deletion-induced increases in autophagy and apoptosis could be reversed by addition of mTOR activators. We further demonstrated that LSD1 inhibition induced mitochondrial dysfunction and mitophagy. In summary, our research results indicate that LSD1 may regulate autophagy and apoptosis through the mTOR pathway and affect early embryonic development of pigs.
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Affiliation(s)
- Jiajia Qi
- Department of Animals Sciences, College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Shaoxuan Zhang
- Department of Animals Sciences, College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Hexuan Qu
- Department of Animals Sciences, College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Yanqiu Wang
- Department of Animals Sciences, College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Yanwei Dong
- Department of Animals Sciences, College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Huakai Wei
- Department of Animals Sciences, College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Yu Wang
- Department of Animals Sciences, College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Boxing Sun
- Department of Animals Sciences, College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Hao Jiang
- Department of Animals Sciences, College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Jiabao Zhang
- Department of Animals Sciences, College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Shuang Liang
- Department of Animals Sciences, College of Animal Sciences, Jilin University, Changchun, Jilin, China.
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Zhao W, Fang H, Wang T, Yao C. Identification of mitochondria-related biomarkers in childhood allergic asthma. BMC Med Genomics 2024; 17:141. [PMID: 38783263 PMCID: PMC11112767 DOI: 10.1186/s12920-024-01901-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 05/06/2024] [Indexed: 05/25/2024] Open
Abstract
BACKGROUND The mechanism of mitochondria-related genes (MRGs) in childhood allergic asthma (CAS) was unclear. The aim of this study was to find new biomarkers related to MRGs in CAS. METHODS This research utilized two CAS-related datasets (GSE40888 and GSE40732) and extracted 40 MRGs from the MitoCarta3.0 Database. Initially, differential expression analysis was performed on CAS and control samples in the GSE40888 dataset to obtain the differentially expressed genes (DEGs). Differentially expressed MRGs (DE-MRGs) were obtained by overlapping the DEGs and MRGs. Protein protein interactions (PPI) network of DE-MRGs was created and the top 10 genes in the degree ranking of Maximal Clique Centrality (MCC) algorithm were defined as feature genes. Hub genes were obtained from the intersection genes from the Least absolute shrinkage and selection operator (LASSO) and EXtreme Gradient Boosting (XGBoost) algorithms. Additionally, the expression validation was conducted, functional enrichment analysis, immune infiltration analysis were finished, and transcription factors (TFs)-miRNA-mRNA regulatory network was constructed. RESULTS A total of 1505 DEGs were obtained from the GSE40888, and 44 DE-MRGs were obtained. A PPI network based on these 44 DE-MRGs was created and revealed strong interactions between ADCK5 and MFN1, BNIP3 and NBR1. Four hub genes (NDUFAF7, MTIF3, MRPS26, and NDUFAF1) were obtained by taking the intersection of genes from the LASSO and XGBoost algorithms based on 10 signature genes which obtained from PPI. In addition, hub genes-based alignment diagram showed good diagnostic performance. The results of Gene Set Enrichment Analysis (GSEA) suggested that hub genes were closely related to mismatch repair. The B cells naive cells were significantly expressed between CAS and control groups, and MTIF3 was most strongly negatively correlated with B cells naive. In addition, the expression of MTIF3 and MRPS26 may have influenced the inflammatory response in CAS patients by affecting mitochondria-related functions. The quantitative real-time polymerase chain reaction (qRT‒PCR) results showed that four hub genes were all down-regulated in the CAS samples. CONCLUSION NDUFAF7, MTIF3, MRPS26, and NDUFAF1 were identified as an MRGs-related biomarkers in CAS, which provides some reference for further research on CAS.
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Affiliation(s)
- Wei Zhao
- Department of Pediatrics, The Second People's Hospital of Hefei, Hefei, Anhui, China.
| | - Hongjuan Fang
- Department of Pediatrics, The Second People's Hospital of Hefei, Hefei, Anhui, China
| | - Tao Wang
- Department of Pediatrics, The Second People's Hospital of Hefei, Hefei, Anhui, China
| | - Chao Yao
- Department of Pediatrics, The Second People's Hospital of Hefei, Hefei, Anhui, China
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3
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Coelho PS, Sousa AJO, Rodrigues ISR, Nascimento HS, Pantoja LC, Miranda MS. Preimplantation development of in vitro-produced bovine embryos treated with hydroxychloroquine. Toxicol In Vitro 2024; 98:105847. [PMID: 38759936 DOI: 10.1016/j.tiv.2024.105847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 04/29/2024] [Accepted: 05/14/2024] [Indexed: 05/19/2024]
Abstract
Hydroxychloroquine (HCQ) is a safe antimalarial drug but its overdosage or inappropriate use, such as during the pandemic, may cause adverse effects once this drug is considered a potent inhibitor of autophagy. Information about HCQ's effects on the reproductive field, including gametes and initial embryos, is limited. In this study, we evaluated the effect of HCQ (1, 6, 12, and 24 μM) on pre-implantation embryo development, autophagy, and apoptosis of bovine embryos produced in vitro. A dose-response experiment showed a reduction (p < 0.05) in cleavage only at the highest concentration. Blastocyst rate was gradually reduced (p < 0.05) with the increase of HCQ dosage starting at 6 μM, with no embryo formation occurring at 24 μM. Further analysis showed that embryos treated with 12 μM of HCQ had a higher (p < 0.05) accumulation of acidic autophagic vesicles on Days 5 and 7 of development and a higher (p < 0.01) apoptotic index on Day 7. To our knowledge, this is the first study to evaluate the effects of HCQ on embryo pre-implantation development in mammals. The results contribute with more information related to the study of autophagy in embryology as well as add some discussion on HCQ toxicology and its effects on reproductive cells.
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Affiliation(s)
- P S Coelho
- Laboratory of Amazon Animal Biotechnology and Medicine (BIOMEDAM), Veterinary Medicine Institute, Federal University of Pará, City of Castanhal 68741-740, Pará State, Brazil
| | - A J O Sousa
- Laboratory of Amazon Animal Biotechnology and Medicine (BIOMEDAM), Veterinary Medicine Institute, Federal University of Pará, City of Castanhal 68741-740, Pará State, Brazil
| | - I S R Rodrigues
- Laboratory of Amazon Animal Biotechnology and Medicine (BIOMEDAM), Veterinary Medicine Institute, Federal University of Pará, City of Castanhal 68741-740, Pará State, Brazil
| | - H S Nascimento
- Laboratory of Amazon Animal Biotechnology and Medicine (BIOMEDAM), Veterinary Medicine Institute, Federal University of Pará, City of Castanhal 68741-740, Pará State, Brazil
| | - L C Pantoja
- Laboratory of Amazon Animal Biotechnology and Medicine (BIOMEDAM), Veterinary Medicine Institute, Federal University of Pará, City of Castanhal 68741-740, Pará State, Brazil
| | - M S Miranda
- Laboratory of Amazon Animal Biotechnology and Medicine (BIOMEDAM), Veterinary Medicine Institute, Federal University of Pará, City of Castanhal 68741-740, Pará State, Brazil.
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Zheng Y, Huang Z, Zhao Y, Huang L, Wang J, Li H, Chen X, Wang J, Xie J. Mechanism of ameliorating cerebral ischemia/reperfusion injury by antioxidant inhibition of autophagy based on network pharmacology and experimental verification. Aging (Albany NY) 2024; 16:7474-7486. [PMID: 38669115 PMCID: PMC11087111 DOI: 10.18632/aging.205773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 03/18/2024] [Indexed: 04/28/2024]
Abstract
Cerebral ischemia-reperfusion injury (CIRI) is one of the most difficult challenges in cerebrovascular disease research. It is primarily caused by excessive autophagy induced by oxidative stress. Previously, a novel compound X5 was found, and the excellent antioxidant activity of it was verified in this study. Moreover, network pharmacological analysis suggested that compound X5 was closely associated with autophagy and the mTOR pathway. In vitro, X5 could significantly inhibit the expression of autophagy proteins Beclin-1 and LC3-β, which are induced by H2O2, and promote the expression of SIRT1. In vivo, compound X5 significantly reduced the infarct size and improved the neurological function scores in the middle cerebral artery occlusion (MCAO) model of rats. In conclusion, ROS-induced autophagy is closely related to mTOR, SIRT1 and others, and X5 holds promise as a candidate for the treatment of CIRI.
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Affiliation(s)
- Yuantie Zheng
- Department of Pharmacy, The Second Affiliated Hospital and Yuying Children’s Hospital of the Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Zhicheng Huang
- Department of Pharmacy, Ezhou Central Hospital, Ezhou, Hubei, China
| | - Yang Zhao
- Department of Pharmacy, Guangyuan Central Hospital, Guangyuan, Sichuan, China
| | - Lili Huang
- Department of Pharmacy, Lihuili Hospital Affiliated to Ningbo University, Ningbo, Zhejiang, China
| | - Jun Wang
- Department of Pharmacy, Guangyuan Central Hospital, Guangyuan, Sichuan, China
| | - Heping Li
- Department of Pharmacy, Guangyuan Central Hospital, Guangyuan, Sichuan, China
| | - Xing Chen
- Department of Pharmacy, Guangyuan Central Hospital, Guangyuan, Sichuan, China
| | - Jingsong Wang
- Department of Pharmacy, Guangyuan Central Hospital, Guangyuan, Sichuan, China
| | - Jingwen Xie
- Department of Pharmacy, The Second Affiliated Hospital and Yuying Children’s Hospital of the Wenzhou Medical University, Wenzhou, Zhejiang, China
- Department of Health, Chongqing Industry and Trade Polytechnic, Chongqing, China
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5
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Wang XQ, Liu RP, Wang J, Luo D, Li YH, Jiang H, Xu YN, Kim NH. Wedelolactone facilitates the early development of parthenogenetically activated porcine embryos by reducing oxidative stress and inhibiting autophagy. PeerJ 2022; 10:e13766. [PMID: 35910774 PMCID: PMC9332323 DOI: 10.7717/peerj.13766] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 06/30/2022] [Indexed: 01/17/2023] Open
Abstract
Wedelolactone (WDL) is a coumaryl ether compound extracted from the traditional Chinese medicinal plant, Eclipta prostrata L. It is a natural polyphenol that exhibits a variety of pharmacological activities, such as anti-inflammatory, anti-free radical, and antioxidant activities in the bone, brain, and ovary. However, its effect on embryonic development remains unknown. The present study explored the influence of WDL supplementation of porcine oocytes culture in vitro on embryonic development and the underlying mechanisms and its effect on the levels of Kelch-like ECH-associated protein 1/nuclear factor-erythroid 2-related factor 2/antioxidant response element (Keap1/Nrf2/ARE). The results showed that WDL (2.5 nM) significantly increased the blastocyst formation rate, mitochondrial activity, and proliferation ability while reducing the reactive oxygen species accumulation, apoptosis, and autophagy. These findings suggested that WDL can enhance the growth and development of early porcine embryos to alleviate oxidative stress and autophagy through regulating NRF2 and microtubule-associated protein 1 light chain 3 (MAP1LC3) gene expression levels.
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Affiliation(s)
- Xin-Qin Wang
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China
| | - Rong-Ping Liu
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China
| | - Jing Wang
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China
| | - Dan Luo
- Jilin Provincial Key Laboratory of Animal Model, Jilin University, Changchun, Jilin, China
| | - Ying-Hua Li
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China
| | - Hao Jiang
- Jilin Provincial Key Laboratory of Animal Model, Jilin University, Changchun, Jilin, China
| | - Yong-Nan Xu
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China
| | - Nam-Hyung Kim
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China
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Tesseraud S, Avril P, Bonnet M, Bonnieu A, Cassar-Malek I, Chabi B, Dessauge F, Gabillard JC, Perruchot MH, Seiliez I. Autophagy in farm animals: current knowledge and future challenges. Autophagy 2021; 17:1809-1827. [PMID: 32686564 PMCID: PMC8386602 DOI: 10.1080/15548627.2020.1798064] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 07/09/2020] [Accepted: 07/10/2020] [Indexed: 12/20/2022] Open
Abstract
Autophagy (a process of cellular self-eating) is a conserved cellular degradative process that plays important roles in maintaining homeostasis and preventing nutritional, metabolic, and infection-mediated stresses. Surprisingly, little attention has been paid to the role of this cellular function in species of agronomical interest, and the details of how autophagy functions in the development of phenotypes of agricultural interest remain largely unexplored. Here, we first provide a brief description of the main mechanisms involved in autophagy, then review our current knowledge regarding autophagy in species of agronomical interest, with particular attention to physiological functions supporting livestock animal production, and finally assess the potential of translating the acquired knowledge to improve animal development, growth and health in the context of growing social, economic and environmental challenges for agriculture.Abbreviations: AKT: AKT serine/threonine kinase; AMPK: AMP-activated protein kinase; ASC: adipose-derived stem cells; ATG: autophagy-related; BECN1: beclin 1; BNIP3: BCL2 interacting protein 3; BVDV: bovine viral diarrhea virus; CALCOCO2/NDP52: calcium binding and coiled-coil domain 2; CMA: chaperone-mediated autophagy; CTSB: cathepsin B; CTSD: cathepsin D; DAP: Death-Associated Protein; ER: endoplasmic reticulum; GFP: green fluorescent protein; Gln: Glutamine; HSPA8/HSC70: heat shock protein family A (Hsp70) member 8; IF: immunofluorescence; IVP: in vitro produced; LAMP2A: lysosomal associated membrane protein 2A; LMS: lysosomal membrane stability; MAP1LC3/LC3: microtubule associated protein 1 light chain 3; MDBK: Madin-Darby bovine kidney; MSC: mesenchymal stem cells; MTOR: mechanistic target of rapamycin kinase; MTORC1: MTOR complex 1; NBR1: NBR1 autophagy cargo receptor; NDV: Newcastle disease virus; NECTIN4: nectin cell adhesion molecule 4; NOD1: nucleotide-binding oligomerization domain 1; OCD: osteochondritis dissecans; OEC: oviduct epithelial cells; OPTN: optineurin; PI3K: phosphoinositide-3-kinase; PPRV: peste des petits ruminants virus; RHDV: rabbit hemorrhagic disease virus; SQSTM1/p62: sequestosome 1; TEM: transmission electron microscopy.
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Affiliation(s)
| | - Pascale Avril
- INRAE, UAR1247 Aquapôle, Saint Pée Sur Nivelle, France
| | - Muriel Bonnet
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, Saint-Genès-Champanelle, France
| | - Anne Bonnieu
- DMEM, Univ Montpellier, INRAE, Montpellier, France
| | - Isabelle Cassar-Malek
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, Saint-Genès-Champanelle, France
| | | | - Frédéric Dessauge
- INRAE, UMR1348 PEGASE, Saint-Gilles, France
- Agrocampus Ouest, UMR1348 PEGASE, Rennes, France
| | | | - Marie-Hélène Perruchot
- INRAE, UMR1348 PEGASE, Saint-Gilles, France
- Agrocampus Ouest, UMR1348 PEGASE, Rennes, France
| | - Iban Seiliez
- Université de Pau et des Pays de l’Adour, E2S UPPA, INRAE, UMR1419 Nutrition Métabolisme et Aquaculture, Saint-Pée-sur-Nivelle, France
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Hale BJ, Li Y, Adur MK, Keating AF, Baumgard LH, Ross JW. Characterization of the effects of heat stress on autophagy induction in the pig oocyte. Reprod Biol Endocrinol 2021; 19:107. [PMID: 34243771 PMCID: PMC8268447 DOI: 10.1186/s12958-021-00791-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 06/23/2021] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Heat stress (HS) occurs when body heat accumulation exceeds heat dissipation and is associated with swine seasonal infertility. HS contributes to compromised oocyte integrity and reduced embryo development. Autophagy is a potential mechanism for the oocyte to mitigate the detrimental effects of HS by recycling damaged cellular components. METHODS To characterize the effect of HS on autophagy in oocyte maturation, we utilized an in vitro maturation (IVM) system where oocytes underwent thermal neutral (TN) conditions throughout the entire maturation period (TN/TN), HS conditions during the first half of IVM (HS/TN), or HS conditions during the second half of IVM (TN/HS). RESULTS To determine the effect of HS on autophagy induction within the oocyte, we compared the relative abundance and localization of autophagy-related proteins. Heat stress treatment affected the abundance of two well described markers of autophagy induction: autophagy related gene 12 (ATG12) in complex with ATG5 and the cleaved form of microtubule-associated protein 1 light chain 3 beta (LC3B-II). The HS/TN IVM treatment increased the abundance of the ATG12-ATG5 complex and exacerbated the loss of LC3B-II in oocytes. The B-cell lymphoma 2 like 1 protein (BCL2L1) can inhibit autophagy or apoptosis through its interaction with either beclin1 (BECN1) or BCL2 associated X, apoptosis regulator (BAX), respectively. We detected colocalization of BCL2L1 with BAX but not BCL2L1 with BECN1, suggesting that apoptosis is inhibited under the HS/TN treatment but not autophagy. Interestingly, low doses of the autophagy inducer, rapamycin, increased oocyte maturation. CONCLUSIONS Our results here suggest that HS increases autophagy induction in the oocyte during IVM, and that artificial induction of autophagy increases the maturation rate of oocytes during IVM. These data support autophagy as a potential mechanism activated in the oocyte during HS to recycle damaged cellular components and maintain developmental competence.
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Affiliation(s)
- Benjamin J Hale
- Department of Animal Science, Iowa State University, 2356 Kildee Hall, Ames, IA, 50011, USA
| | - Yunsheng Li
- Department of Animal Science, Iowa State University, 2356 Kildee Hall, Ames, IA, 50011, USA
| | - Malavika K Adur
- Department of Animal Science, Iowa State University, 2356 Kildee Hall, Ames, IA, 50011, USA
| | - Aileen F Keating
- Department of Animal Science, Iowa State University, 2356 Kildee Hall, Ames, IA, 50011, USA
| | - Lance H Baumgard
- Department of Animal Science, Iowa State University, 2356 Kildee Hall, Ames, IA, 50011, USA
| | - Jason W Ross
- Department of Animal Science, Iowa State University, 2356 Kildee Hall, Ames, IA, 50011, USA.
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8
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Contextualizing Autophagy during Gametogenesis and Preimplantation Embryonic Development. Int J Mol Sci 2021; 22:ijms22126313. [PMID: 34204653 PMCID: PMC8231133 DOI: 10.3390/ijms22126313] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/27/2021] [Accepted: 04/27/2021] [Indexed: 01/05/2023] Open
Abstract
Mammals face environmental stressors throughout their lifespan, which may jeopardize cellular homeostasis. Hence, these organisms have acquired mechanisms to cope with stressors by sensing, repairing the damage, and reallocating resources to increase the odds of long-term survival. Autophagy is a pro-survival lysosome-mediated cytoplasm degradation pathway for organelle and macromolecule recycling. Furthermore, autophagy efflux increases, and this pathway becomes idiosyncratic depending upon developmental and environmental contexts. Mammalian germ cells and preimplantation embryos are attractive models for dissecting autophagy due to their metastable phenotypes during differentiation and exposure to varying environmental cues. The aim of this review is to explore autophagy during mammalian gametogenesis, fertilization and preimplantation embryonic development by contemplating its physiological role during development, under key stressors, and within the scope of assisted reproduction technologies.
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Oxidative stress induced by methomyl exposure reduces the quality of early embryo development in mice. ZYGOTE 2021; 30:57-64. [PMID: 33966682 DOI: 10.1017/s0967199421000277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Methomyl is a widely used carbamate insecticide and environmental oestrogen that has adverse effects on the reproductive system. However, there have been no reports on the effect of methomyl on early embryos in mammals. In this study, we explored the effect of methomyl exposure on the quality of early embryonic development in mice and the possible mechanisms. During in vitro culture, different concentrations of methomyl (10, 20, 30 and 35 μM) were added to mouse zygote medium. The results showed that methomyl had an adverse effect on early embryonic development. Compared with the control group, the addition of 30 μM methomyl significantly reduced the rate of early embryo blastocyst formation. Methomyl exposure can increase oxidative stress and impair mitochondrial function, which may be the cause of blastocyst formation. In addition, we found that methomyl exposure promoted apoptosis and autophagy in mouse blastocysts. The toxic effect of methomyl on early embryos may be the result of oxidative stress induction. Taken together, our results indicate that methomyl can cause embryonic development defects in mice, thereby reducing the quality of early embryo development.
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Li HH, Bao LS, Deng SM, Liu L, Cheng J, Chen X, Pan YX, Zhang JS, Chu WY. Investigation of Proteus vulgaris and Elizabethkingia meningoseptica invasion on muscle oxidative stress and autophagy in Chinese soft-shelled turtle (Pelodiscus sinensis). Sci Rep 2021; 11:3657. [PMID: 33574492 PMCID: PMC7878920 DOI: 10.1038/s41598-021-83388-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 02/02/2021] [Indexed: 01/30/2023] Open
Abstract
Muscle is an important structural tissue in aquatic animals and it is susceptible to bacterial and fungal infection, which could affect flesh quality and health. In this study, Chinese soft-shelled turtles were artificially infected with two pathogens, Proteus vulgaris and Elizabethkingia meningoseptica and the effects on muscle nutritional characteristics, oxidative stress and autophagy were assayed. Upon infection, the muscle nutritional composition and muscle fiber structure were notably influenced. Meanwhile, the mRNA expression of Nrf2 was down-regulated and Keap1 up-regulated, thus resulting in a decrease in antioxidant capacity and oxidative stress. However, with N-acetylcysteine treatment, the level of oxidative stress was decreased, accompanied by significant increases in antioxidant enzyme activities and the mRNA levels of SOD, CAT, GSTCD, and GSTO1. Interestingly, there was a significant increase in autophagy in the muscle tissue after the pathogen infection, but this increase could be reduced by N-acetylcysteine treatment. Our findings suggest that muscle nutritional characteristics were dramatically changed after pathogen infection, and oxidative stress and autophagy were induced by pathogen infection. However, N-acetylcysteine treatment could compromise the process perhaps by decreasing the ROS level and regulating Nrf2-antioxidant signaling pathways.
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Affiliation(s)
- Hong-Hui Li
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, College of Biological and Environmental Engineering, Changsha University, Changsha, China
- College of Chemistry and Food Engineering, Changsha University of Science & Technology, Changsha, China
| | - Ling-Sheng Bao
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, College of Biological and Environmental Engineering, Changsha University, Changsha, China
| | | | - Li Liu
- Hunan Fisheries Science Institute, Changsha, China
| | - Jia Cheng
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, College of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Xiao Chen
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, College of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Ya-Xiong Pan
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, College of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Jian-She Zhang
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, College of Biological and Environmental Engineering, Changsha University, Changsha, China.
| | - Wu-Ying Chu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, College of Biological and Environmental Engineering, Changsha University, Changsha, China.
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Yan J, Xie Y, Wang F, Chen Y, Zhang J, Dou Z, Gan L, Li H, Si J, Sun C, Di C, Zhang H. Carbon ion combined with tigecycline inhibits lung cancer cell proliferation by inducing mitochondrial dysfunction. Life Sci 2020; 263:118586. [PMID: 33065148 DOI: 10.1016/j.lfs.2020.118586] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 10/01/2020] [Accepted: 10/06/2020] [Indexed: 02/07/2023]
Abstract
AIMS Mitochondrial dysfunction is receiving considerable attention due to irreplaceable biological function of mitochondria. Ionizing radiation and tigecycline (TIG) alone can cause mitochondrial dysfunction, playing important role in tumor therapy. However, prior studies fail to investigate combined mechanism of carbon ion irradiation (IR) and TIG on tumor proliferation inhibition. The study aimed to explore the combined effects of both on autophagy and apoptosis. MATERIALS AND METHODS NSCLC cells A549 and H1299 were treated with carbon ion, TIG, or both. Cell survival rate, autophagy, apoptosis, expression of mitochondrial signaling proteins were determined by clone formation assay, immunofluorescence of LC3B, flow cytometry and western blotting, respectively; ATP content, mitochondrial membrane potential (MMP) and Ca2+ level in mitochondria were used to assessed mitochondrial function. KEY FINDINGS Results showed IR combined TIG inhibited cells proliferation by increasing apoptosis in both cells and enhancing autophagy in H1299 cells. Additionally, combination treatment induced the most severe mitochondrial dysfunction by sharply reducing ATP, MMP and increasing Ca2+ level of mitochondria. Up-regulation and down-regulation of mitochondrial translation proteins (EF-Tu, GFM1 and MRPS12) expression affected apoptosis and autophagy, while the level of p-mTOR was consistent with their expression in both cell types. In A549 cells, p-AMPK level decreased while p-Akt and p-mTOR increased after combination treatment. SIGNIFICANCE Overall, our results showed that p-Akt and p-AMPK antagonistically targeted p-mTOR to regulate mitochondrial translation proteins to affect autophagy and apoptosis. Furthermore, this study suggests that combination of carbon ion and TIG is a potential therapeutic option against tumors.
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Affiliation(s)
- Junfang Yan
- Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Road, Lanzhou 730000, China; Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, Gansu, China; Key Laboratory of Heavy Ion Radiation Medicine of Gansu Province, Lanzhou, Gansu, China; Graduate School of University of Chinese Academy of Sciences, Beijing 100039, China
| | - Yi Xie
- Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Road, Lanzhou 730000, China; Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, Gansu, China; Key Laboratory of Heavy Ion Radiation Medicine of Gansu Province, Lanzhou, Gansu, China
| | - Fang Wang
- Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Road, Lanzhou 730000, China; Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, Gansu, China; Key Laboratory of Heavy Ion Radiation Medicine of Gansu Province, Lanzhou, Gansu, China; Graduate School of University of Chinese Academy of Sciences, Beijing 100039, China
| | - Yuhong Chen
- Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Road, Lanzhou 730000, China; Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, Gansu, China; Key Laboratory of Heavy Ion Radiation Medicine of Gansu Province, Lanzhou, Gansu, China; Graduate School of University of Chinese Academy of Sciences, Beijing 100039, China
| | - Jinhua Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Road, Lanzhou 730000, China; Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, Gansu, China; Key Laboratory of Heavy Ion Radiation Medicine of Gansu Province, Lanzhou, Gansu, China; Graduate School of University of Chinese Academy of Sciences, Beijing 100039, China
| | - Zhihui Dou
- Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Road, Lanzhou 730000, China; Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, Gansu, China; Key Laboratory of Heavy Ion Radiation Medicine of Gansu Province, Lanzhou, Gansu, China; Graduate School of University of Chinese Academy of Sciences, Beijing 100039, China
| | - Lu Gan
- Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Road, Lanzhou 730000, China; Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, Gansu, China; Key Laboratory of Heavy Ion Radiation Medicine of Gansu Province, Lanzhou, Gansu, China; Graduate School of University of Chinese Academy of Sciences, Beijing 100039, China
| | - Hongyan Li
- Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Road, Lanzhou 730000, China; Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, Gansu, China; Key Laboratory of Heavy Ion Radiation Medicine of Gansu Province, Lanzhou, Gansu, China
| | - Jing Si
- Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Road, Lanzhou 730000, China; Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, Gansu, China; Key Laboratory of Heavy Ion Radiation Medicine of Gansu Province, Lanzhou, Gansu, China
| | - Chao Sun
- Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Road, Lanzhou 730000, China; Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, Gansu, China; Key Laboratory of Heavy Ion Radiation Medicine of Gansu Province, Lanzhou, Gansu, China
| | - Cuixia Di
- Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Road, Lanzhou 730000, China; Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, Gansu, China; Key Laboratory of Heavy Ion Radiation Medicine of Gansu Province, Lanzhou, Gansu, China
| | - Hong Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Road, Lanzhou 730000, China; Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Lanzhou, Gansu, China; Key Laboratory of Heavy Ion Radiation Medicine of Gansu Province, Lanzhou, Gansu, China.
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12
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Toralova T, Kinterova V, Chmelikova E, Kanka J. The neglected part of early embryonic development: maternal protein degradation. Cell Mol Life Sci 2020; 77:3177-3194. [PMID: 32095869 PMCID: PMC11104927 DOI: 10.1007/s00018-020-03482-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 01/24/2020] [Accepted: 02/07/2020] [Indexed: 12/28/2022]
Abstract
The degradation of maternally provided molecules is a very important process during early embryogenesis. However, the vast majority of studies deals with mRNA degradation and protein degradation is only a very little explored process yet. The aim of this article was to summarize current knowledge about the protein degradation during embryogenesis of mammals. In addition to resuming of known data concerning mammalian embryogenesis, we tried to fill the gaps in knowledge by comparison with facts known about protein degradation in early embryos of non-mammalian species. Maternal protein degradation seems to be driven by very strict rules in terms of specificity and timing. The degradation of some maternal proteins is certainly necessary for the normal course of embryonic genome activation (EGA) and several concrete proteins that need to be degraded before major EGA have been already found. Nevertheless, the most important period seems to take place even before preimplantation development-during oocyte maturation. The defects arisen during this period seems to be later irreparable.
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Affiliation(s)
- Tereza Toralova
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Libechov, Czech Republic
| | - Veronika Kinterova
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Libechov, Czech Republic.
- Department of Veterinary Sciences, Czech University of Life Sciences in Prague, Prague, Czech Republic.
| | - Eva Chmelikova
- Department of Veterinary Sciences, Czech University of Life Sciences in Prague, Prague, Czech Republic
| | - Jiri Kanka
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Libechov, Czech Republic
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Luo Z, Xu X, Sho T, Zhang J, Xu W, Yao J, Xu J. ROS-induced autophagy regulates porcine trophectoderm cell apoptosis, proliferation, and differentiation. Am J Physiol Cell Physiol 2018; 316:C198-C209. [PMID: 30485137 DOI: 10.1152/ajpcell.00256.2018] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Significant embryo loss remains a serious problem in pig production. Reactive oxygen species (ROS) play a critical role in embryonic implantation and placentation. However, the potential mechanism of ROS on porcine trophectoderm (pTr) cell fate during the peri-implantation period has not been investigated. This study aimed to elucidate the effects of ROS on pTr cell phenotypes and the regulatory role in cell attachment and differentiation. Herein, results showed that exogenous H2O2 inhibited pTr cell viability, arrested the cell cycle at S and G2/M phases, and increased cell apoptosis and autophagy protein light chain 3B and Beclin-1, whereas these effects were reversed by different concentrations of N-acetyl-l-cysteine (NAC) posttreatment. In addition, NAC abolished H2O2-induced autophagic flux, inhibited intracellular and mitochondrial ROS, and restored expression of genes important for mitochondrial DNA and biogenesis, cell attachment, and differentiation. NAC reversed H2O2-activated MAPK and Akt/mammalian target of rapamycin pathways in dose-dependent manners. Furthermore, analyses with pharmacological and RNA interference approaches suggested that autophagy regulated cell apoptosis and gene expression of caudal-related homeobox 2 and IL-1β. Collectively, these results provide new insights into the role of the ROS-induced autophagy in pTr cell apoptosis, attachment, and differentiation, indicating a promising target for decreasing porcine conceptus loss during the peri-implantation period.
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Affiliation(s)
- Zhen Luo
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai Key Laboratory of Veterinary Biotechnology , Shanghai , China
| | - Xue Xu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai Key Laboratory of Veterinary Biotechnology , Shanghai , China
| | - Takami Sho
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai Key Laboratory of Veterinary Biotechnology , Shanghai , China
| | - Jing Zhang
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai Key Laboratory of Veterinary Biotechnology , Shanghai , China
| | - Weina Xu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai Key Laboratory of Veterinary Biotechnology , Shanghai , China
| | - Jianbo Yao
- Division of Animal and Nutritional Sciences, West Virginia University , Morgantown, West Virginia
| | - Jianxiong Xu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai Key Laboratory of Veterinary Biotechnology , Shanghai , China
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14
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Suh KS, Chon S, Choi EM. Protective effects of piceatannol on methylglyoxal-induced cytotoxicity in MC3T3-E1 osteoblastic cells. Free Radic Res 2018; 52:712-723. [DOI: 10.1080/10715762.2018.1467010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Kwang Sik Suh
- Department of Endocrinology and Metabolism, School of Medicine, Kyung Hee University, Dongdaemun-gu, Republic of Korea
| | - Suk Chon
- Department of Endocrinology and Metabolism, School of Medicine, Kyung Hee University, Dongdaemun-gu, Republic of Korea
| | - Eun Mi Choi
- Department of Endocrinology and Metabolism, School of Medicine, Kyung Hee University, Dongdaemun-gu, Republic of Korea
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15
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Ross JW, Hale BJ, Seibert JT, Romoser MR, Adur MK, Keating AF, Baumgard LH. Physiological mechanisms through which heat stress compromises reproduction in pigs. Mol Reprod Dev 2018; 84:934-945. [PMID: 28667793 DOI: 10.1002/mrd.22859] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 06/06/2017] [Indexed: 12/31/2022]
Abstract
Seasonal variations in environmental temperatures impose added stress on domestic species bred for economically important production traits. These heat-mediated stressors vary on a seasonal, daily, or spatial scale, and negatively impact behavior and reduce feed intake and growth rate, which inevitably lead to reduced herd productivity. The seasonal infertility observed in domestic swine is primarily characterized by depressed reproductive performance, which manifests as delayed puberty onset, reduced farrowing rates, and extended weaning-to-estrus intervals. Understanding the effects of heat stress at the organismal, cellular, and molecular level is a prerequisite to identifying mitigation strategies that should reduce the economic burden of compromised reproduction. In this review, we discuss the effect of heat stress on an animal's ability to maintain homeostasis in multiple systems via several hypothalamic-pituitary-end organ axes. Additionally, we discuss our understanding of epigenetic programming and how hyperthermia experienced in utero influences industry-relevant postnatal phenotypes. Further, we highlight the recent recognized mechanisms by which distant tissues and organs may molecularly communicate via extracellular vesicles, a potentially novel mechanism contributing to the heat-stress response.
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Affiliation(s)
- Jason W Ross
- Department of Animal Science, Iowa State University, Ames, Iowa
| | - Benjamin J Hale
- Department of Animal Science, Iowa State University, Ames, Iowa
| | - Jacob T Seibert
- Department of Animal Science, Iowa State University, Ames, Iowa
| | | | - Malavika K Adur
- Department of Animal Science, Iowa State University, Ames, Iowa
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16
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Brownstein AJ, Ganesan S, Summers CM, Pearce S, Hale BJ, Ross JW, Gabler N, Seibert JT, Rhoads RP, Baumgard LH, Selsby JT. Heat stress causes dysfunctional autophagy in oxidative skeletal muscle. Physiol Rep 2018. [PMID: 28646096 PMCID: PMC5492206 DOI: 10.14814/phy2.13317] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
We have previously established that 24 h of environmental hyperthermia causes oxidative stress and have implicated mitochondria as likely contributors to this process. Given this, we hypothesized that heat stress would lead to increased autophagy/mitophagy and a reduction in mitochondrial content. To address this hypothesis pigs were housed in thermoneutral (TN; 20°C) or heat stress (35°C) conditions for 1- (HS1) or 3- (HS3) days and the red and white portions of the semitendinosus collected. We did not detect differences in glycolytic muscle. Counter to our hypothesis, upstream activation of autophagy was largely similar between groups as were markers of autophagosome nucleation and elongation. LC3A/B-I increased 1.6-fold in HS1 and HS3 compared to TN (P < 0.05), LC3A/B-II was increased 4.1-fold in HS1 and 4.8-fold in HS3 relative to TN, (P < 0.05) and the LC3A/B-II/I ratio was increased 3-fold in HS1 and HS3 compared to TN suggesting an accumulation of autophagosomes. p62 was dramatically increased in HS1 and HS3 compared to TN Heat stress decreased mitophagy markers PINK1 7.0-fold in HS1 (P < 0.05) and numerically by 2.4-fold in HS3 compared to TN and BNIP3L/NIX by 2.5-fold (P < 0.05) in HS1 and HS3. Markers of mitochondrial content were largely increased without activation of PGC-1α signaling. In total, these data suggest heat-stress-mediated suppression of activation of autophagy and autophagosomal degradation, which may enable the persistence of damaged mitochondria in muscle cells and promote a dysfunctional intracellular environment.
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Affiliation(s)
| | - Shanthi Ganesan
- Department of Animal Science, Iowa State University, Ames, Iowa
| | - Corey M Summers
- Department of Animal Science, Iowa State University, Ames, Iowa
| | - Sarah Pearce
- Department of Animal Science, Iowa State University, Ames, Iowa
| | - Benjamin J Hale
- Department of Animal Science, Iowa State University, Ames, Iowa
| | - Jason W Ross
- Department of Animal Science, Iowa State University, Ames, Iowa
| | - Nicholas Gabler
- Department of Animal Science, Iowa State University, Ames, Iowa
| | - Jacob T Seibert
- Department of Animal Science, Iowa State University, Ames, Iowa
| | - Robert P Rhoads
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, Virginia
| | | | - Joshua T Selsby
- Department of Animal Science, Iowa State University, Ames, Iowa
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17
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Suh KS, Chon S, Choi EM. Cytoprotective effects of xanthohumol against methylglyoxal-induced cytotoxicity in MC3T3-E1 osteoblastic cells. J Appl Toxicol 2017; 38:180-192. [DOI: 10.1002/jat.3521] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 07/22/2017] [Accepted: 08/11/2017] [Indexed: 12/11/2022]
Affiliation(s)
- Kwang Sik Suh
- Department of Endocrinology & Metabolism, School of Medicine; Kyung Hee University; 1, Hoegi-dong, Dongdaemun-gu Seoul 02447 Republic of Korea
| | - Suk Chon
- Department of Endocrinology & Metabolism, School of Medicine; Kyung Hee University; 1, Hoegi-dong, Dongdaemun-gu Seoul 02447 Republic of Korea
| | - Eun Mi Choi
- Department of Endocrinology & Metabolism, School of Medicine; Kyung Hee University; 1, Hoegi-dong, Dongdaemun-gu Seoul 02447 Republic of Korea
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18
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Sirtuin inhibition leads to autophagy and apoptosis in porcine preimplantation blastocysts. Biochem Biophys Res Commun 2017; 488:603-608. [DOI: 10.1016/j.bbrc.2017.05.087] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 05/15/2017] [Indexed: 01/16/2023]
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Triptolide Inhibited Cytotoxicity of Differentiated PC12 Cells Induced by Amyloid-Beta₂₅₋₃₅ via the Autophagy Pathway. PLoS One 2015; 10:e0142719. [PMID: 26554937 PMCID: PMC4640509 DOI: 10.1371/journal.pone.0142719] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 10/26/2015] [Indexed: 01/31/2023] Open
Abstract
Evidence shows that an abnormal deposition of amyloid beta-peptide25–35 (Aβ25–35) was the primary cause of the pathogenesis of Alzheimer’s disease (AD). And the elimination of Aβ25–35 is considered an important target for the treatment of AD. Triptolide (TP), isolated from Tripterygium wilfordii Hook.f. (TWHF), has been shown to possess a broad spectrum of biological profiles, including neurotrophic and neuroprotective effects. In our study investigating the effect and potential mechanism of triptolide on cytotoxicity of differentiated rat pheochromocytoma cell line (the PC12 cell line is often used as a neuronal developmental model) induced by Amyloid-Beta25–35 (Aβ25–35), we used 3-(4, 5-dimethylthiazol-2-yl)-2, 5- diphenyltetrazolium bromide (MTT) assay, flow cytometry, Western blot, and acridine orange staining to detect whether triptolide could inhibit Aβ25–35–induced cell apoptosis. We focused on the potential role of the autophagy pathway in Aβ25–35-treated differentiated PC12 cells. Our experiments show that cell viability is significantly decreased, and the apoptosis increased in Aβ25–35-treated differentiated PC12 cells. Meanwhile, Aβ25–35 treatment increased the expression of microtubule-associated protein light chain 3 II (LC3 II), which indicates an activation of autophagy. However, triptolide could protect differentiated PC12 cells against Aβ25–35-induced cytotoxicity and attenuate Aβ25–35-induced differentiated PC12 cell apoptosis. Triptolide could also suppress the level of autophagy. In order to assess the effect of autophagy on the protective effects of triptolide in differentiated PC12 cells treated with Aβ25–35, we used 3-Methyladenine (3-MA, an autophagy inhibitor) and rapamycin (an autophagy activator). MTT assay showed that 3-MA elevated cell viability compared with the Aβ25–35-treated group and rapamycin inhibits the protection of triptolide. These results suggest that triptolide will repair the neurological damage in AD caused by deposition of Aβ25–35 via the autophagy pathway, all of which may provide an exciting view of the potential application of triptolide or TWHF as a future research for AD.
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Xing WM, Yuan TJ, Xu JD, Gu LL, Liang P, Lu H. Proteomic identification of mitochondrial targets involved in andrographolide sodium bisulfite-induced nephrotoxicity in a rat model. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2015; 40:592-599. [PMID: 26356389 DOI: 10.1016/j.etap.2015.08.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 08/07/2015] [Accepted: 08/10/2015] [Indexed: 06/05/2023]
Abstract
Our previous works have indicated that the mitochondrion is the primary target of nephrotoxicity induced by andrographolide sodium bisulfate (ASB), but the mechanisms of ASB-induced nephrotoxicity have remained largely unknown. In this study, proteomic analysis was used to explore the changes in the renal mitochondrial proteome in SD rats after treatment with ASB. SD rats were intraperitoneally administered with ASB (100, 600mg/kg/d) for 7 days. Renal impairment was evaluated by pathological observation. Two-dimensional gel electrophoresis (2-DE), as well as matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry (MS), was applied for the identification of mitochondrial protein and was validated by Western blotting. Protein-protein interactions were analyzed using a Web-based bioinformatics tool (STRING, version 9.1). Rat kidneys exhibited histopathological changes after treatment with ASB, and 13 proteins were significantly changed, including ES1 protein homolog, heat shock cognate 71kDa protein, peroxiredoxin-1 (Prdx1), cytochrome C oxidase subunit 5B (COX5B), prohibitin (PHB), threonine-tRNA ligase, pyruvate dehydrogenase E1 component subunit beta (PDH-β), voltage-dependent anion-selective channel protein 2 (VDAC2), voltage-dependent anion-selective channel protein 1 (VDAC1), adenylate kinase 2 (KAD2) and others. These data demonstrated that the expression levels of several proteins significantly changed in the mitochondria, and these proteins could be candidate biomarkers for ASB-induced nephrotoxicity.
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Affiliation(s)
- Wen Min Xing
- School of Pharmacology, Zhejiang Chinese Medical University, Hangzhou, PR China
| | - Tang Juan Yuan
- School of Pharmacology, Zhejiang Chinese Medical University, Hangzhou, PR China
| | - Jia Dong Xu
- School of Pharmacology, Zhejiang Chinese Medical University, Hangzhou, PR China
| | - Li Li Gu
- School of Pharmacology, Zhejiang Chinese Medical University, Hangzhou, PR China
| | - Pei Liang
- School of Pharmacology, Zhejiang Chinese Medical University, Hangzhou, PR China
| | - Hong Lu
- School of Pharmacology, Zhejiang Chinese Medical University, Hangzhou, PR China.
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21
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Han SP, Zhou DX, Lin P, Qin Z, An L, Zheng LR, Lei L. Formaldehyde exposure induces autophagy in testicular tissues of adult male rats. ENVIRONMENTAL TOXICOLOGY 2015; 30:323-331. [PMID: 24142868 DOI: 10.1002/tox.21910] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 09/17/2013] [Accepted: 09/20/2013] [Indexed: 06/02/2023]
Abstract
Formaldehyde, a ubiquitous environmental pollutant, has long been suspected of causing adverse male reproductive effects. However, the molecular and cellular mechanisms underlying this phenomenon remain elusive. The overall aim of this study is to clarify the role of autophagy in male reproductive injuries induced by formaldehyde exposure, by which we can further understand the molecular mechanism of spermatogenesis and develop new targets for prevention and treatment of male infertility. In this study, electron microscopy, Western blot, and RT-PCR analysis were used to detect autophagy in testicular tissues. Moreover, testicular weights, histopathology, and morphometry were used to evaluate the reproductive injuries of formaldehyde exposure. We found that formaldehyde exposure-induced autophagy in testicular tissues was dose dependent. Increasing autophagosomes in spermatogenetic cells was observed by electron microscopy in formaldehyde exposure group. In addition, RT-PCR and Western blot analysis showed the transcription levels of the LC3-II, as well as the conversion from LC3-I to LC3-II, an indicator of autophagy, significantly increased in testicular tissue of formaldehyde exposure group in a dose dependent manner when compared with those in control group. Furthermore, the alterations of autophage were basically consistent with the changes in testicular weight and morphologic findings. In summary, formaldehyde exposure triggered autophagy, and autophagy may be a scathing factor responsible for male reproductive impairment induced by formaldehyde.
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Affiliation(s)
- Shui-Ping Han
- Pathology Department, Medical School, Xi'an Jiaotong University, Xi-an City, Shaanxi Province, 710061, China
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22
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Hayashi K, Dan K, Goto F, Tshuchihashi N, Nomura Y, Fujioka M, Kanzaki S, Ogawa K. The autophagy pathway maintained signaling crosstalk with the Keap1-Nrf2 system through p62 in auditory cells under oxidative stress. Cell Signal 2015; 27:382-93. [PMID: 25435427 DOI: 10.1016/j.cellsig.2014.11.024] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2014] [Revised: 11/04/2014] [Accepted: 11/19/2014] [Indexed: 12/28/2022]
Abstract
The main purposes of our study were to consider the effect of autophagy on auditory cells under oxidative stress, and the function of possible crosstalk among p62, Keap1 and Nrf2 in autophagy-deficient auditory cells. First, we described how cell death was induced in auditory cell line (HEI-OC1) exposed to H2O2. We found that the decision for the cell death of auditory cells under oxidative stress depends on the balance between autophagy and necrosis due to ATP depletion, and autophagy plays a cytoprotective function in oxidative stress-induced necrosis. Our data clearly suggested that autophagy was a cell survival mechanism in H2O2-induced cell death, based on the observation that suppression of autophagy by knockdown of Atg7 sensitized, whereas activation of autophagy by rapamycin protected against H2O2-induced cell death. Next, our results regarding the relationship among p62, Nrf2 and Keap1 by siRNA paradoxically showed that p62 creates a positive feedback loop in the Keap1/Nrf2 pathway. Autophagy impaired by Atg7 knockdown degrades Keap1 in a p62-dependent manner, whereas Nrf2 is activated. As a result, the cell death induced by H2O2 was promoted in auditory cells. Taken together, these results suggested that the autophagy pathway maintained signaling crosstalk with the Keap1-Nrf2 system through p62 in auditory cells under oxidative stress.
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Affiliation(s)
- Ken Hayashi
- Department of Otolaryngology, Kamio Memorial Hospital, Tokyo 101-0063, Japan; Department of Otolaryngology, School of Medicine, Keio University, Tokyo 160-8582, Japan.
| | - Katsuaki Dan
- Collaborative Research Resources, Core Instrumentation Facility, Keio University, Tokyo 160-8582, Japan.
| | - Fumiyuki Goto
- Department of Otolaryngology, School of Medicine, Keio University, Tokyo 160-8582, Japan.
| | - Nana Tshuchihashi
- Department of Otolaryngology, School of Medicine, Keio University, Tokyo 160-8582, Japan; Department of Otolaryngology, School of Medicine, Kyushu University, Fukuoka 812-8582, Japan.
| | - Yasuyuki Nomura
- Department of Otolaryngology, School of Medicine, Nihon University, Tokyo 173-8610, Japan.
| | - Masato Fujioka
- Department of Otolaryngology, School of Medicine, Keio University, Tokyo 160-8582, Japan.
| | - Sho Kanzaki
- Department of Otolaryngology, School of Medicine, Keio University, Tokyo 160-8582, Japan.
| | - Kaoru Ogawa
- Department of Otolaryngology, School of Medicine, Keio University, Tokyo 160-8582, Japan.
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Ross JW, Hale BJ, Gabler NK, Rhoads RP, Keating AF, Baumgard LH. Physiological consequences of heat stress in pigs. ANIMAL PRODUCTION SCIENCE 2015. [DOI: 10.1071/an15267] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Heat stress negatively influences the global pork industry and undermines genetic, nutritional, management and pharmaceutical advances in management, feed and reproductive efficiency. Specifically, heat stress-induced economic losses result from poor sow performance, reduced and inconsistent growth, decreased carcass quality, mortality, morbidity, and processing issues caused by less rigid adipose tissue (also known as flimsy fat). When environmental conditions exceed the pig’s thermal neutral zone, nutrients are diverted from product synthesis (meat, fetus, milk) to body temperature maintenance thereby compromising efficiency. Unfortunately, genetic selection for both increased litter size and leaner phenotypes decreases pigs’ tolerance to heat, as enhanced fetal development and protein accretion results in increased basal heat production. Additionally, research has demonstrated that in utero heat stress negatively and permanently alters post-natal body temperature and body composition and both variables represent an underappreciated consequence of heat stress. Advances in management (i.e. cooling systems) have partially alleviated the negative impacts of heat stress, but productivity continues to decline during the warm summer months. The detrimental effects of heat stress on animal welfare and production will likely become more of an issue in regions most affected by continued predictions for climate change, with some models forecasting extreme summer conditions in key animal-producing areas of the globe. Therefore, heat stress is likely one of the primary factors limiting profitable animal protein production and will certainly continue to compromise food security (especially in emerging countries) and regionalise pork production in developed countries. Thus, there is an urgent need to have a better understanding of how heat stress reduces animal productivity. Defining the biology of how heat stress jeopardises animal performance is critical in developing approaches (genetic, managerial, nutritional and pharmaceutical) to ameliorate current production issues and improve animal wellbeing and performance.
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Giuliani CM, Dass CR. Metabolic stress and cancer: is autophagy the common denominator and a feasible target? ACTA ACUST UNITED AC 2013; 66:597-614. [PMID: 24341996 DOI: 10.1111/jphp.12191] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 10/23/2013] [Indexed: 12/12/2022]
Abstract
OBJECTIVES Autophagy facilitates the degradation of proteins or organelles into recyclable molecules, which are released into the cell to foster cell survival under energetic stress. Furthermore, autophagy has been associated with cancer cell survival and chemoresistance, and as such, it is an area of increasing interest. As autophagic activity and its regulation are related to metabolism and energy stress, it is critical to elucidate the exact molecular mechanisms that drive it. KEY FINDINGS Cancer is recognised to have specific metabolic changes, which include the switch from oxidative phosphorylation to glycolysis. Although the exact rationale is yet to be determined, it is proposed to limit hypoxic stress and generate substrates for biosynthesis. The various forms of energetic stress including hypoxia, glucose and amino acid deprivation have been reviewed in relation to their effect on autophagy and certain key molecules identified to date. These key molecules, which include AMP-activated protein kinase, mammalian target of rapamycin complex 1, adenosine triphosphate and reactive oxygen species, are all implicated as key stimuli of autophagic activity, as will be discussed in this review. SUMMARY These findings indicate that autophagic regulation could be a means to better cancer treatment.
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Affiliation(s)
- Charlett M Giuliani
- School of Biomedical and Health Sciences, Victoria University, St Albans, Victoria, Australia
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Abstract
Microtubule-associated protein light chain 3 (LC3)-II is a marker of autophagosome. In this study, LC3-II expression was used to identify autophagy, during the in vitro maturation of porcine oocytes. In a time-course experiment, cumulus-oocyte complexes (COCs) were cultured in NCSU23 medium for 0 h, 14 h, 28 h or 42 h. The cumulus cells were removed and denuded oocytes were processed for western blotting or immunostaining. Western blotting showed that the LC3-II levels changed over time, with maximum levels observed at 14 h and minimum levels at 42 h. Immunostaining of LC3 showed the signals with dot shapes and ring shapes in oocytes at every group that probably represent autophagosomes. To ascertain whether autophagic induction and degradation were occurring, we treated the cultures with autophagic inhibitors. Lysosomal protease inhibitor E64d and pepstatin A increased the LC3-II levels and wortmannin, inhibitor of autophagic induction, decreased the LC3-II levels. Western blotting and immunostaining demonstrated that LC3-II is present in porcine oocytes cultured in vitro. The decreased LC3-II levels after wortmannin treatment suggest that it is newly generated in porcine oocytes, a phenomenon that represents autophagic induction. Furthermore, increased LC3-II levels after E64d and pepstatin A addition imply that LC3-II is degraded by lysosomal proteases, an indication of autophagic degradation. Our results suggest that autophagy, which is a dynamic process whereby autophagosomes are newly generated and subsequently degraded, is probably occurring in porcine oocytes during in vitro maturation.
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Liu D, Yang J, Wang L. Cadmium induces ultrastructural changes in the hepatopancreas of the freshwater crab Sinopotamon henanense. Micron 2013; 47:24-32. [DOI: 10.1016/j.micron.2013.01.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Revised: 01/04/2013] [Accepted: 01/17/2013] [Indexed: 02/08/2023]
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Hill BG, Benavides GA, Lancaster JR, Ballinger S, Dell’Italia L, Zhang J, Darley-Usmar VM. Integration of cellular bioenergetics with mitochondrial quality control and autophagy. Biol Chem 2012; 393:1485-1512. [PMID: 23092819 PMCID: PMC3594552 DOI: 10.1515/hsz-2012-0198] [Citation(s) in RCA: 330] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2012] [Accepted: 06/22/2012] [Indexed: 02/06/2023]
Abstract
Bioenergetic dysfunction is emerging as a cornerstone for establishing a framework for understanding the pathophysiology of cardiovascular disease, diabetes,cancer and neurodegeneration. Recent advances in cellular bioenergetics have shown that many cells maintain a substantial bioenergetic reserve capacity, which is a prospective index of ‘ healthy ’ mitochondrial populations.The bioenergetics of the cell are likely regulated by energy requirements and substrate availability. Additionally,the overall quality of the mitochondrial population and the relative abundance of mitochondria in cells and tissues also impinge on overall bioenergetic capacity and resistance to stress. Because mitochondria are susceptible to damage mediated by reactive oxygen/nitrogen and lipid species, maintaining a ‘ healthy ’ population of mitochondria through quality control mechanisms appears to be essential for cell survival under conditions of pathological stress. Accumulating evidence suggest that mitophagy is particularly important for preventing amplification of initial oxidative insults, which otherwise would further impair the respiratory chain or promote mutations in mitochondrial DNA (mtDNA). The processes underlying the regulation of mitophagy depend on several factors, including the integrity of mtDNA, electron transport chain activity, and the interaction and regulation of the autophagic machinery. The integration and interpretation of cellular bioenergetics in the context of mitochondrial quality control and genetics is the theme of this review.
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Affiliation(s)
- Bradford G. Hill
- Diabetes and Obesity Center, Institute of Molecular Cardiology, and Department of Medicine, University of Louisville, Louisville, KY
- Departments of Biochemistry and Molecular Biology and Physiology and Biophysics, University of Louisville, Louisville, KY
| | - Gloria A. Benavides
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294
- Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Jack R. Lancaster
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294
- Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, AL 35294
- Department of Anesthesiology, University of Alabama at Birmingham, Birmingham, AL 35294
- Department of Physiology and Biophysics, University of Alabama at Birmingham, Birmingham, AL 35294
- Department of Environmental Health Sciences, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Scott Ballinger
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294
- Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, AL 35294
- Department of Medicine, Center for Heart Failure Research, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Lou Dell’Italia
- Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, AL 35294
- Department of Medicine, Center for Heart Failure Research, University of Alabama at Birmingham, Birmingham, AL 35294
- Department of Veteran Affairs Medical Center, Birmingham, AL 35294
| | - Jianhua Zhang
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294
- Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, AL 35294
- Department of Veteran Affairs Medical Center, Birmingham, AL 35294
| | - Victor M. Darley-Usmar
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294
- Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, AL 35294
- Department of Medicine, Center for Heart Failure Research, University of Alabama at Birmingham, Birmingham, AL 35294
- Department of Environmental Health Sciences, University of Alabama at Birmingham, Birmingham, AL 35294
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Yang FY, Yu MX, Zhou Q, Chen WL, Gao P, Huang Z. Effects of Iron Oxide Nanoparticle Labeling on Human Endothelial Cells. Cell Transplant 2012; 21:1805-20. [PMID: 22776829 DOI: 10.3727/096368912x652986] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Iron oxide nanoparticles (INOPS) are a potential contrast agent for magnetic resonance (MR) tracking of transplanted endothelial cells. The objective of this study was to examine the effect of INOPS labeling on endothelial cells. The mixture of INOPS and poly-l-lysine (PLL) was used to label human endothelial cells. Labeling efficiency was examined by Prussian blue staining, transmission electron microscopy, and atomic absorption spectrometry. The effect of iron oxide concentration on cell viability and proliferation were determined. The correlation of reactive oxygen species (ROS) and apoptosis was also examined. In vitro MRI scanning was carried out using a 1.5T MR system. INOPS-PLL could be readily taken up by endothelial cells and subsequently induce MRI signal intensity changes. However, higher labeling concentration (>50 μg/ml) and longer incubation (48 h) can affect cell viability and proliferation. Mitochondrial damage, apoptosis, and autolysosmes were observed under high INOPS-PLL concentrations, which were correlated to ROS production. INOPS-PLL nanoparticles can be used to label transplanted endothelial cells. However, high concentration of INOPS can impair cell viability, possibly through ROS-mediated apoptosis and autophagy.
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Affiliation(s)
- Fu-Yuan Yang
- MOE Key Laboratory of Laser Life Science, South China Normal University, Guangzhou, China
| | - Ming-Xi Yu
- MOE Key Laboratory of Laser Life Science, South China Normal University, Guangzhou, China
| | - Quan Zhou
- Medical Imaging Center, the First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Wen-Li Chen
- MOE Key Laboratory of Laser Life Science, South China Normal University, Guangzhou, China
| | - Peng Gao
- Medical Imaging Center, the First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Zheng Huang
- School of Medicine and School of Engineering and Applied Science, University of Colorado-Denver, Denver, CO, USA
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Anderson ER, Burmester JK, Caldwell MD. Evaluation of a mitochondrial DNA mutation in maternally inherited and sporadic cases of Dupuytren disease. Clin Med Res 2012; 10:122-6. [PMID: 22634541 PMCID: PMC3421422 DOI: 10.3121/cmr.2012.1063] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The purpose was to test the hypothesis that Dupuytren disease (DD) is associated with a previously reported mutation in mitochondrial DNA at position 2839. METHODS Two hundred sixty-nine cases of DD and an equal number of matched controls were identified in Marshfield Clinic's Personalized Medicine Research Project (PMRP). Clinical data used to describe the cohort were abstracted from the electronic medical records of the population. Genetic analysis of all the cases and controls was done using a custom synthesis TaqMan assay, while genetic analysis of sixteen of the above cases with a familial history of DD was performed by mitochondrial DNA sequencing at position C2839A. RESULTS Cases and controls were evenly distributed with 167 (62%) men and 102 (38%) women. The majority, 264 (98%) of the cases and controls were white non-Hispanic. Of the 269 cases, 16 were found to have a familial history of DD. Two cases had a maternal history, eight a paternal history, five an affected sibling, and one a paternal grandfather. All cases and controls were found to have only the C allele at the site of the reported mitochondrial C2839A polymorphism. CONCLUSIONS The previously reported mitochondrial mutation was not present in our small, maternally inherited cohort or in the total population of 538 cases and controls. This finding does not support the reported incidence of this polymorphism in 90% of the affected population with a maternal inheritance, and calls into question the role of the C2839A mitochondrial DNA polymorphism in familial or sporadic cases of DD.
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Affiliation(s)
- Eric R Anderson
- Department of General Surgery, Marshfield Clinic, Wisconsin 54449, USA.
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Xu YN, Shen XH, Lee SE, Kwon JS, Kim DJ, Heo YT, Cui XS, Kim NH. Autophagy influences maternal mRNA degradation and apoptosis in porcine parthenotes developing in vitro. J Reprod Dev 2012; 58:576-84. [PMID: 22785354 DOI: 10.1262/jrd.2012-005] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Autophagy, an essential process for cellular maintenance, cell viability, and development, is the bulk degradation of proteins and organelles. This study investigated the expression levels of autophagy-related genes and the effect of 3-methyladenine (3-MA, an autophagy inhibitor) or rapamycin (an autophagy inducer) on maternal gene degradation and apoptosis in porcine parthenotes developing in vitro. LC3, which is essential for the formation of autophagosomes, was widely expressed in porcine parthenotes. High levels of autophagy-related genes, Atg5, Beclin1 and Lc3 transcripts were expressed in the 1-cell (1C) stage and gradually decreased through the 2-cell (2C) to blastocyst stages. The mRNA expression of Gdf9, c-mos and cyclin B maintained high levels in 2C and 4-cell (4C) embryos treated with 3-MA compared with the control. The Bmp15 and cyclin B mRNA levels were significantly reduced in embryos treated with rapamycin compared with the control. These results suggest that autophagy influences the degradation of these maternal genes. Furthermore, 3-MA-treated embryos exhibited significantly reduced developmental rates, decreased total cell numbers and increased rates of apoptosis. Expression of Atg5, Beclin1 and Lc3 and synthesis of LC3 protein were significantly reduced at the blastocyst stage. Although rapamycin treatment did not affect the developmental rate, it decreased the cell number and increased the rate of apoptosis, and the expression of Atg5, Beclin1 and Lc3 and LC3 protein synthesis were increased. Finally, blastocysts derived following treatment with 3-MA or rapamycin exhibited significantly decreased expression of selected transcription factors, including Pou5f1, Sox2 and Nanog. In conclusion, our results demonstrate that autophagy influences maternal mRNA degradation and apoptosis at the blastocyst stage and suggest that autophagy plays an important role in early embryo development in the pig.
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Affiliation(s)
- Yong-Nan Xu
- Department of Animal Sciences, Chungbuk National University, Chungbuk 361-763, South Korea
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Lee SE, Hwang KC, Sun SC, Xu YN, Kim NH. Modulation of autophagy influences development and apoptosis in mouse embryos developing in vitro. Mol Reprod Dev 2011; 78:498-509. [PMID: 21681844 DOI: 10.1002/mrd.21331] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Accepted: 05/06/2011] [Indexed: 11/08/2022]
Abstract
Autophagyis, the bulk degradation of proteins and organelles, is essential for cellular maintenance, cell viability, and development, and is often involved in type II programmed cell death in mammals. This study investigated the expression levels of autophagy-related genes and the effect of 3-methyladenine (3-MA, an autophagy inhibitor) or rapamycin (an autophagy inducer) on the in vitro development and apoptosis of mouse embryos. LC3, which is essential for the formation of autophagosomes, was widely expressed in mouse embryos, and high levels of transcript were present from 1 to 4 cells but gradually decreased through the morula and blastocyst stages. 3-MA-treated embryos exhibited significantly reduced developmental rates and total cell numbers, but increased rates of apoptosis. Furthermore, both the expression of Lc3, Gabarap, Atg4A, and Atg4B, and the synthesis of LC3 were significantly reduced at the blastocyst stage. Although rapamycin treatment did not affect developmental rates, cell numbers decreased, and the apoptosis rate increased. Expression of Lc3, Gabarap, Atg4A, and Atg4B, and synthesis of LC3 increased as well. Modulation of Lc3 mRNA and LC3 protein levels using 3-MA or rapamycin significantly increased apoptotic cell death through the disruption of mitochondrial morphology and reduction of mtDNA copy number at the blastocyst stage. Interestingly, the inner cell mass, detected by immunostaining with POU5F1 (OCT3/4) after 3-MA or rapamycin treatment of embryos, was significantly increased compared to controls. These results suggest that autophagy influences developmental patterning and apoptosis, and may play a role in early mouse embryogenesis.
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Affiliation(s)
- Seung-Eun Lee
- Department of Animal Science, Chungbuk National University, Cheongju, Chungbuk, South Korea
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