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Over Fifty Years of Life, Death, and Cannibalism: A Historical Recollection of Apoptosis and Autophagy. Int J Mol Sci 2021; 22:ijms222212466. [PMID: 34830349 PMCID: PMC8618802 DOI: 10.3390/ijms222212466] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 11/02/2021] [Accepted: 11/03/2021] [Indexed: 01/18/2023] Open
Abstract
Research in biomedical sciences has changed dramatically over the past fifty years. There is no doubt that the discovery of apoptosis and autophagy as two highly synchronized and regulated mechanisms in cellular homeostasis are among the most important discoveries in these decades. Along with the advancement in molecular biology, identifying the genetic players in apoptosis and autophagy has shed light on our understanding of their function in physiological and pathological conditions. In this review, we first describe the history of key discoveries in apoptosis with a molecular insight and continue with apoptosis pathways and their regulation. We touch upon the role of apoptosis in human health and its malfunction in several diseases. We discuss the path to the morphological and molecular discovery of autophagy. Moreover, we dive deep into the precise regulation of autophagy and recent findings from basic research to clinical applications of autophagy modulation in human health and illnesses and the available therapies for many diseases caused by impaired autophagy. We conclude with the exciting crosstalk between apoptosis and autophagy, from the early discoveries to recent findings.
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Meng J, Ma H, Zhu Y, Zhao Q. Dehydrocostuslactone attenuated oxygen and glucose deprivation/reperfusion-induced PC12 cell injury through inhibition of apoptosis and autophagy by activating the PI3K/AKT/mTOR pathway. Eur J Pharmacol 2021; 911:174554. [PMID: 34627804 DOI: 10.1016/j.ejphar.2021.174554] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 10/03/2021] [Accepted: 10/05/2021] [Indexed: 10/20/2022]
Abstract
The purpose of this study is to investigate the protective effect of dehydrocostuslactone (DHL) on PC12 cells injury induced by oxygen and glucose deprivation/reperfusion (OGD/R) and its possible mechanism on the PI3K/AKT/mTOR pathway. The maestro 11.1 software was used to predict the binding sites of DHL with LC3, Beclin-1, PI3K, AKT, mTOR, Bax, Bcl-2, Caspase-3, Caspase-9, and Caspase-7. We used a cellular model of 2 h of OGD and 24 h of reperfusion to mimic cerebral ischemia-reperfusion injury. Cells were treated with DHL during the reperfusion phase. The docking results showed that DHL had binding sites with LC3, Beclin-1, PI3K, AKT, mTOR, Bax, Bcl-2, Caspase-3, Caspase-9, and Caspase-7. The expression levels of autophagy-related proteins, LC3 and Beclin-1 increased while P-PI3K, P-AKT, and P-mTOR decreased. Apoptosis-related proteins, namely, Bax, Cyto-c, Caspase-3, Caspase-7, Caspase-9 increased, but the anti-apoptosis Bcl-2 protein decreased. However, DHL effectively inhibited these undesirable changes induced by OGD/R in PC12 cells. Our results suggested that DHL attenuated OGD/R-induced neuronal injury by inhibiting apoptosis and autophagy by activating PI3K/AKT/mTOR signaling. This inhibition can improve cell survival and offer evidence for the beneficial effects of DHL on the nervous system.
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Affiliation(s)
- Jinni Meng
- School of Pharmacy, Ningxia Medical University, No. 1160 Shengli Street, Xingqing District Yinchuan City, 750004, China
| | - Huixia Ma
- School of Pharmacy, Ningxia Medical University, No. 1160 Shengli Street, Xingqing District Yinchuan City, 750004, China
| | - Yafei Zhu
- School of Basic Medical Sciences, Ningxia Medical University, No. 1160 Shengli Street, Xingqing District Yinchuan City, 750004, China.
| | - Qipeng Zhao
- School of Pharmacy, Ningxia Medical University, No. 1160 Shengli Street, Xingqing District Yinchuan City, 750004, China; Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education (Ningxia Medical University), No. 1160 Shengli Street, Xingqing District Yinchuan City, 750004, China.
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Chen P, Dai CH, Shi ZH, Wang Y, Wu JN, Chen K, Su JY, Li J. Synergistic inhibitory effect of berberine and icotinib on non-small cell lung cancer cells via inducing autophagic cell death and apoptosis. Apoptosis 2021; 26:639-656. [PMID: 34743246 DOI: 10.1007/s10495-021-01694-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2021] [Indexed: 01/12/2023]
Abstract
Resistance to epidermal growth factor receptor-tyrosin kinase inhibitors (TKIs, e.g. icotinib) remains a major clinical challenge. Non-small cell lung cancer patients with wild-type EGFR and/or K-RAS mutation are primary resistance to EGFR-TKIs. Berberine has been found to have potent anticancer activities via distinct molecular mechanism. In this study, we sought to investigate the therapeutic utility of BBR in combination with icotinib to overcome icotinib resistance in NSCLC cells, and explore the molecular mechanism of synergism of icotinib and BBR to EGFR-resistant NSCLC cells. We used the two EGFR-resistant NSCLC cell lines H460 and H1299 for testing the inhibitory effect of icotinib and/or BBR on them. Moreover, xenograft mouse model was applied for assessing the anti-tumor activities of BBR and icotinib in combination. Results showed that BBR and icotinib have a synergistic inhibitory effect on H460 and H1299 cells through induction of autophagic cell death and apoptosis. Accordingly, the anti-cancer effect of BBR plus icotinib was further confirmed in the NSCLC xenograft mouse models. Combination of BBR and icotinib significantly inhibited the protein expression and the activity of EGFR by inducing autophagic EGFR degradation. BBR plus icotinib resulted in intracellular ROS accumulation, which could mediated autophagy and apoptosis and involved in the suppression of cell migration and invasion. In conclusions, combination application of BBR and icotinib could be an effective strategy to overcome icotinib resistance in the treatment of NSCLC.
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Affiliation(s)
- Ping Chen
- Department of Pulmonary Medicine, Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Chun-Hua Dai
- Department of Radiation Oncology, Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Zhi-Hao Shi
- Department of Pulmonary Medicine, Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Yi Wang
- Center of Medical Experiment, Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Jian-Nong Wu
- Department of Pathology, Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Kang Chen
- Department of Pulmonary Medicine, Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Jin-Yu Su
- Department of Pulmonary Medicine, Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Jian Li
- Department of Pulmonary Medicine, Affiliated Hospital of Jiangsu University, Zhenjiang, China.
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Li H, Qi J, Wei J, Xu B, Min S, Wang L, Si Y, Qiu H. Long non-coding RNA ANRIL mitigates neonatal hypoxic-ischemic brain damage via targeting the miR-378b/ATG3 axis. Am J Transl Res 2021; 13:11585-11596. [PMID: 34786084 PMCID: PMC8581876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 08/22/2021] [Indexed: 06/13/2023]
Abstract
Hypoxic-ischemic brain injury (HIBD) is the most common form of brain injury in newborns and is a major burden on society. However, the molecular mechanism of HIBD remains unclear. Long non-coding RNA (lncRNA) has been demonstrated to be a key regulator in brain development and numerous neurological diseases. The present study identified the role and underlying mechanism of lncRNA antisense non-coding RNA in the INK4 locus (ANRIL) in HIBD. The data indicated that ANRIL expression was significantly increased in hypoxia-stressed primary neurons and PC12 cells. Silencing ANRIL aggravated oxygen-glucose deprivation-induced cell injury. Mechanistically, microRNA (miR)-378b was predicted and confirmed as a direct target of ANRIL. A miR-378b inhibitor counteracted the effect of ANRIL on hypoxia-induced cell injury. Furthermore, ANRIL positively regulated autophagy related 3 (ATG3) expression and promoted autophagy through competitively binding to miR-378b. Overall, the present findings suggest that ANRIL exerts its protective effects via binding to miR-378b and upregulating ATG3 expression, suggesting the potential of ANRIL as a protective target for HIBD.
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Affiliation(s)
- Huiling Li
- Key Laboratory of Microecology-immune Regulatory Network and Related Disease, School of Basic Medicine, Jiamusi UniversityJiamusi 154007, Heilongjiang, China
| | - Jiafeng Qi
- Harbin Children’s HospitalHarbin 150010, Heilongjiang, China
| | - Jiannan Wei
- Department of Neurology, Jiamusi Central HospitalJiamusi 154002, Heilongjiang, China
| | - Beilei Xu
- School of Pharmacy, Harbin University of CommerceHarbin, Heilongjiang 150076, China
| | - Shuangwu Min
- Harbin Children’s HospitalHarbin 150010, Heilongjiang, China
| | - Liyang Wang
- Harbin Children’s HospitalHarbin 150010, Heilongjiang, China
| | - Yuan Si
- Harbin Children’s HospitalHarbin 150010, Heilongjiang, China
| | - Hongbin Qiu
- Department of Epidemiology and Biostatistics, School of Public Health, Jiamusi UniversityJiamusi 154000, Heilongjiang, China
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Wu S, Zhong G, Wan F, Jiang X, Tang Z, Hu T, Rao G, Lan J, Hussain R, Tang L, Zhang H, Huang R, Hu L. Evaluation of toxic effects induced by arsenic trioxide or/and antimony on autophagy and apoptosis in testis of adult mice. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:54647-54660. [PMID: 34014480 DOI: 10.1007/s11356-021-14486-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 05/14/2021] [Indexed: 06/12/2023]
Abstract
Arsenic trioxide (ATO) and antimony (Sb) are well-known ubiquitous environmental contaminants and cause unpromising male reproductive effects in target and non-target exposed organisms. The main objective of this study was to investigate the effects of ATO or/and Sb on process of autophagy, apoptosis, and reproductive organ in adult mice. For this reason, a total of 32 adult mice were randomly divided into different groups like control group, ATO-treated group, Sb-treated group, and combined group. The duration of current experimental trial was 2 months. Various adverse effects of ATO or/and Sb on sperm parameters, oxidative stress, autophagy, and apoptosis were determined in testis of mice. Results indicated that parameters of sperm quality for organ coefficient, sperm count, ratio of sperm survival, testosterone level, and germ cells were significantly decreased, while malformation rate and vacuolization significantly increased in mice exposed to different treatments. Furthermore, the status of antioxidant index of T-AOC, SOD, and MsrB1 levels was reduced, while MDA increased significantly in ATO + Sb group. Results on TEM investigation determined that the autophagosomes, autolysosome, nuclear pyknosis, and chromatin condensation were prominent ailments, and the levels of autophagy and pro-apoptosis indictors including Beclin1, Atg-5, LC3B/LC3A, caspase-8, cytc, cleaved caspase-3, p53, and Bax were up-regulated in treated group, while the content of an anti-apoptosis maker (Bcl-2) was down-regulated. In conclusion, the results of our experiment suggested that abnormal process of autophagy and apoptosis was triggered by arsenic and antimony, and intensity of toxic effects increased in combined treatments of ATO and Sb.
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Affiliation(s)
- Shaofeng Wu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Gaolong Zhong
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Fang Wan
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Xuanxuan Jiang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Zhaoxin Tang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Ting Hu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Gan Rao
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Juan Lan
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Riaz Hussain
- Department of Pathology, Faculty of Veterinary and Animal Sciences, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | - Lixuan Tang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Hui Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Riming Huang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Lianmei Hu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China.
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Stewart T, Zea A, Aviles D. Expression of the IL-2R in Human Podocytes and the Effect of Activation on Autophagy and Apoptosis. Fetal Pediatr Pathol 2021; 40:369-377. [PMID: 31971468 DOI: 10.1080/15513815.2019.1710793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Interleukin 2 (IL-2) treatment is associated with proteinuria. Materials and Methods: A conditionally immortalized human podocyte cell line was used to investigate expression of the podocyte specific marker podocin, IL-2R alpha (IL-2Rα), apoptosis marker Bax, and autophagy markers LC3I AND LC3II, determined by quantitative immunoblotting, following 24, 48, and 72 hours of IL-2 stimulation, comparing them to unstimulated cells. Results: Podocin was expressed at all time points. IL-2Rα expression was increased after 24 and 72 hrs (p = 0.0014, p = 0.0139) and decreased after 48 hours (p = 0.0445). Bax, LC3I, and LC3II were increased after 24 hrs (p = 0.0094, p = 0.0016, p = 0.0004) and 48 hrs (p = 0.0072, p = 0.0024, p = 0.0087). Conclusion: Human podocytes express the IL-2R and activation results in increased autophagy and apoptosis.
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Affiliation(s)
- Tyrus Stewart
- LSU Health Sciences Center, Department of Pediatrics, New Orleans, USA
| | - Arnold Zea
- LSU Health Sciences Center New Orleans, New Orleans, USA
| | - Diego Aviles
- LSU Health Sciences Center, Department of Pediatrics, New Orleans, USA
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HIF-1 α Activation Promotes Luteolysis by Enhancing ROS Levels in the Corpus Luteum of Pseudopregnant Rats. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:1764929. [PMID: 34512862 PMCID: PMC8429025 DOI: 10.1155/2021/1764929] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 08/12/2021] [Indexed: 11/23/2022]
Abstract
The increase of oxidative stress is one of the important characteristics of mammalian luteal regression. Previous investigations have revealed the essential role of reactive oxygen species (ROS) in luteal cell death during luteolysis, while it is unknown how ROS is regulated in this process. Considering the decrease of blood flow and increase of PGF2α during luteolysis, we hypothesized that the HIF-1α pathway may be involved in the regulation of ROS in the luteal cell of the late corpus luteum (CL). Here, by using a pseudopregnant rat model, we showed that the level of both HIF-1α and its downstream BNIP3 was increased during luteal regression. Consistently, we observed the increase of autophagy level during luteolysis, which is regulated in a Beclin1-independent manner. Comparing with early (Day 7 of pseudopregnancy) and middle CL (Day 14), the level of ROS was significantly increased in late CL, indicating the contribution of oxidative stress in luteolysis. Inhibition of HIF-1α by echinomycin (Ech), a potent HIF-1α inhibitor, ameliorated the upregulation of BNIP3 and NIX, as well as the induction of autophagy and the accumulation of ROS in luteal cells on Day 21 of pseudopregnancy. Morphologically, Ech treatment delayed the atrophy of the luteal structure at the late-luteal stage. An in vitro study indicated that inhibition of HIF-1α can also attenuate PGF2α-induced ROS and luteal cell apoptosis. Furthermore, the decrease of cell apoptosis can also be observed by ROS inhibition under PGF2α treatment. Taken together, our results indicated that HIF-1α signaling is involved in the regression of CL by modulating ROS production via orchestrating autophagy. Inhibition of HIF-1α could obviously hamper the apoptosis of luteal cells and the process of luteal regression.
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Zhang Y, Zhang X, Lu M, Zou X. Ceramide-1-phosphate and its transfer proteins in eukaryotes. Chem Phys Lipids 2021; 240:105135. [PMID: 34499882 DOI: 10.1016/j.chemphyslip.2021.105135] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 07/31/2021] [Accepted: 09/02/2021] [Indexed: 02/07/2023]
Abstract
Ceramide-1-phosphate (C1P) is a bioactive phosphorylated sphingolipid (SL), produced through the direct phosphorylation of ceramide by ceramide kinase. It plays important roles in regulating cell survival, migration, apoptosis and autophagy and is involved in inflammasome assembly/activation, which can stimulate group IVA cytosolic phospholipase A2α and subsequently increase the levels of arachidonic acid and pro-inflammatory cytokines. Human C1P transfer protein (CPTP) can selectively transport C1P from the Golgi apparatus to specific cellular sites through a non-vesicular mechanism. Human CPTP also affects specific SL levels, thus regulating cell SL homeostasis. In addition, human CPTP plays a crucial role in the regulation of autophagy, inflammation and cell death; thus, human CPTP is closely associated with autophagy and inflammation-related diseases such as cardiovascular and neurodegenerative diseases, and cancers. Therefore, illustrating the functions and mechanisms of human CPTP is important for providing the research foundations for targeted therapy. The key human CPTP residues for C1P recognition and binding are highly conserved in eukaryotic orthologs, while the human CPTP homolog in Arabidopsis (accelerated cell death 11) also exhibits selective inter-membrane transfer of phyto-C1P. These results demonstrate that C1P transporters play fundamental roles in SL metabolism in cells. The present review summarized novel findings of C1P and its TPs in eukaryotes.
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Affiliation(s)
- Yanqun Zhang
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, PR China
| | - Xiangyu Zhang
- Affiliated Stomatology Hospital of Guilin Medical University, Guilin, 541004, PR China
| | - Mengyun Lu
- Affiliated Stomatology Hospital of Guilin Medical University, Guilin, 541004, PR China
| | - Xianqiong Zou
- Affiliated Stomatology Hospital of Guilin Medical University, Guilin, 541004, PR China; College of Biotechnology, Guilin Medical University, Guilin, 541100, PR China.
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Yokoyama N, Hanafusa K, Hotta T, Oshima E, Iwabuchi K, Nakayama H. Multiplicity of Glycosphingolipid-Enriched Microdomain-Driven Immune Signaling. Int J Mol Sci 2021; 22:9565. [PMID: 34502474 PMCID: PMC8430928 DOI: 10.3390/ijms22179565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/29/2021] [Accepted: 09/01/2021] [Indexed: 11/16/2022] Open
Abstract
Glycosphingolipids (GSLs), together with cholesterol, sphingomyelin (SM), and glycosylphosphatidylinositol (GPI)-anchored and membrane-associated signal transduction molecules, form GSL-enriched microdomains. These specialized microdomains interact in a cis manner with various immune receptors, affecting immune receptor-mediated signaling. This, in turn, results in the regulation of a broad range of immunological functions, including phagocytosis, cytokine production, antigen presentation and apoptosis. In addition, GSLs alone can regulate immunological functions by acting as ligands for immune receptors, and exogenous GSLs can alter the organization of microdomains and microdomain-associated signaling. Many pathogens, including viruses, bacteria and fungi, enter host cells by binding to GSL-enriched microdomains. Intracellular pathogens survive inside phagocytes by manipulating intracellular microdomain-driven signaling and/or sphingolipid metabolism pathways. This review describes the mechanisms by which GSL-enriched microdomains regulate immune signaling.
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Affiliation(s)
- Noriko Yokoyama
- Institute for Environmental and Gender-Specific Medicine, Juntendo University, Graduate School of Medicine, Urayasu, Chiba 279-0021, Japan; (N.Y.); (K.H.); (T.H.); (E.O.); (K.I.)
| | - Kei Hanafusa
- Institute for Environmental and Gender-Specific Medicine, Juntendo University, Graduate School of Medicine, Urayasu, Chiba 279-0021, Japan; (N.Y.); (K.H.); (T.H.); (E.O.); (K.I.)
| | - Tomomi Hotta
- Institute for Environmental and Gender-Specific Medicine, Juntendo University, Graduate School of Medicine, Urayasu, Chiba 279-0021, Japan; (N.Y.); (K.H.); (T.H.); (E.O.); (K.I.)
| | - Eriko Oshima
- Institute for Environmental and Gender-Specific Medicine, Juntendo University, Graduate School of Medicine, Urayasu, Chiba 279-0021, Japan; (N.Y.); (K.H.); (T.H.); (E.O.); (K.I.)
| | - Kazuhisa Iwabuchi
- Institute for Environmental and Gender-Specific Medicine, Juntendo University, Graduate School of Medicine, Urayasu, Chiba 279-0021, Japan; (N.Y.); (K.H.); (T.H.); (E.O.); (K.I.)
- Laboratory of Biochemistry, Juntendo University Faculty of Health Care and Nursing, Urayasu, Chiba 279-0023, Japan
- Infection Control Nursing, Juntendo University Graduate School of Health Care and Nursing, Urayasu, Chiba 279-0023, Japan
| | - Hitoshi Nakayama
- Institute for Environmental and Gender-Specific Medicine, Juntendo University, Graduate School of Medicine, Urayasu, Chiba 279-0021, Japan; (N.Y.); (K.H.); (T.H.); (E.O.); (K.I.)
- Laboratory of Biochemistry, Juntendo University Faculty of Health Care and Nursing, Urayasu, Chiba 279-0023, Japan
- Infection Control Nursing, Juntendo University Graduate School of Health Care and Nursing, Urayasu, Chiba 279-0023, Japan
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Autophagy Delays Apoptotic Cell Death Induced by Siniperca chuatsi Rhabdovirus in Epithelioma Papulosum Cyprinid Cells. Viruses 2021; 13:v13081554. [PMID: 34452418 PMCID: PMC8402738 DOI: 10.3390/v13081554] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 08/02/2021] [Accepted: 08/03/2021] [Indexed: 12/11/2022] Open
Abstract
Autophagy and apoptosis are two key cell fate determination pathways, which play vital roles in the interaction between viruses and host cells. Previous research had confirmed that one strain of fish rhabdoviruses, Siniperca chuatsi rhabdovirus (SCRV), could induce apoptosis and autophagy after infection. In the current study, we continued to analyze the interaction of autophagy and apoptosis in SCRV-infected EPC cell lines after treatment with different autophagy or apoptosis inhibitors. We found that SCRV infection could activate the mitochondrial apoptotic pathway by the detection of the activities of the caspase-3 and caspase-9 and by flow cytometry analysis in JC-1-stained cells, respectively. Furthermore, no significant autophagy-related factors were disturbed in SCRV-infected cell after apoptosis inhibitor Z-VAD-FMK treatment, while autophagy inducer rapamycin could obviously delay the occurrence of CPE and cell death. Meanwhile, rapamycin was able to reduce the proportion of apoptotic cells. Besides that, rapamycin could disturb the expression of p62 and LC3B-II, and the transcription level of SCRV nucleoprotein mRNA. The progeny virus titers did not show a big difference between the rapamycin treatment or without it. Collectively, our data preliminarily confirmed that SCRV-activated autophagy could delay apoptosis in EPC cells and may not affect virus production. Further study may need to focus on the crosstalk regulation and its roles on the SCRV infection.
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Wu S, Yu W, Jiang X, Huang R, Zhang X, Lan J, Zhong G, Wan F, Tang Z, Hu L. Protective effects of curcumin on ATO-induced nephrotoxicity in ducks in relation to suppressed autophagy, apoptosis and dyslipidemia by regulating oxidative stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 219:112350. [PMID: 34022626 DOI: 10.1016/j.ecoenv.2021.112350] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 05/12/2021] [Accepted: 05/13/2021] [Indexed: 06/12/2023]
Abstract
Arsenic trioxide (ATO) has been known as common environmental pollution, and is deemed to a threat to global public health. Curcumin (Cur) is a phytoconstituent, which has been demonstrated to have antioxidant effects. In the current experiment, we investigated the efficacy of Cur against ATO-induced kidney injury and explored the potential molecular mechanisms that have not yet been fully elucidated in ducks. The results showed that treatment with Cur attenuated ATO-induced body weight loss, reduced the content of ATO in the kidney, and improved ATO-induced kidney pathological damage. Cur also remarkably alleviated the ascent of ATO-induced MDA level and activated the Nrf2 pathway. Using the TEM, we found Cur relieved mitochondrial swelling, autolysosomes generating and nuclear damage. Simultaneously, Cur was found that it not only significantly reduced autophagy-related mRNA and protein levels (mTOR, LC3-Ⅰ, LC3-Ⅱ, Atg-5, Beclin1, Pink1 and Parkin) and but also decreased apoptosis-related mRNA and protein expression levels (cleaved caspase-3, Cytc, p53 and Bax). Furthermore, through nontargeted metabolomics analysis, we observed that lipid metabolism balance was disordered by ATO exposure, while Cur administration alleviated the disturbance of lipid metabolism. These results showed ATO could induce autophagy and apoptosis by overproducing ROS in the kidney of ducks, and Cur might relieve excessive autophagy, apoptosis and disturbance of lipid metabolism by regulating oxidative stress. Collectively, our findings explicate the potential therapeutic value of Cur as a new strategy to a variety of disorders caused by ATO exposure.
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Affiliation(s)
- Shaofeng Wu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
| | - Wenlan Yu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
| | - Xuanxuan Jiang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
| | - Riming Huang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
| | - Xiaoyong Zhang
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China.
| | - Juan Lan
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
| | - Gaolong Zhong
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
| | - Fang Wan
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
| | - Zhaoxin Tang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
| | - Lianmei Hu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
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Zhao JY, Li XY, Liu TD, Liang B, Huang Y, Li W. Silencing of ATG4D suppressed proliferation and enhanced cisplatin-induced apoptosis in hepatocellular carcinoma through Akt/Caspase-3 pathway. Mol Cell Biochem 2021; 476:4153-4159. [PMID: 34313895 DOI: 10.1007/s11010-021-04224-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 07/14/2021] [Indexed: 01/07/2023]
Abstract
ATG4D, a member of autophagy-related protein 4 (ATG4) family, plays an interplay role between autophagy and apoptosis in cancers. However, the role of ATG4D in hepatocellular carcinoma (HCC) has not been defined. Herein, this study aimed to investigate the role and the underlying mechanism of ATG4D in regulating HCC cell apoptosis. ATG4D was silenced in MHCC-97L HCC cells, and then cell proliferation and apoptosis were examined. ATG4D expression was significantly upregulated in HCC tissues when compared with paired non-tumor tissues. In vitro assays revealed that silencing of ATG4D significantly suppressed cell proliferation, promoted cell apoptosis, and enhanced sensitivity to cisplatin of MHCC-97L cells. Furthermore, silencing of ATG4D decreased the phosphorylation of Akt and increased the protein level of caspase-3. Taken together, ATG4D may play an oncogenic role in HCC progression. These findings suggest that ATG4D may serve as a therapeutic target for HCC therapy.
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Affiliation(s)
- Jing-Yuan Zhao
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330000, China
- Department of Endocrinology, Nanchang Hospital, Sun Yat-Sen University, Nanchang, 330000, China
| | - Xiao-Yun Li
- Department of Medical Oncology, The First Affiliated Hospital, He-Nan University, Kaifeng, 475000, China
| | - Tian-De Liu
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330000, China
| | - Bo Liang
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330000, China
| | - Yong Huang
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330000, China
| | - Wen Li
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330000, China.
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Normobaric Oxygen (NBO) Therapy Reduces Cerebral Ischemia/Reperfusion Injury through Inhibition of Early Autophagy. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:7041290. [PMID: 34306153 PMCID: PMC8263229 DOI: 10.1155/2021/7041290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/31/2021] [Accepted: 06/20/2021] [Indexed: 11/17/2022]
Abstract
Objectives Normobaric oxygen (NBO) therapy has great clinical potential in the treatment of ischemic stroke, but its underlying mechanism is unknown. Our study aimed to investigate the role of autophagy during the application of NBO on cerebral ischemia/reperfusion injury. Methods Male Sprague Dawley rats received 2 hours of middle cerebral artery occlusion (MCAO), followed by 2, 6, or 24 hours of reperfusion. At the beginning of reperfusion, rats were randomly given NBO (95% O2) or room air (21% O2) for 2 hours. In some animals, 3-methyladenine (3-MA, autophagy inhibitor) was administered 10 minutes before reperfusion. The severity of the ischemic injury was determined by infarct volume, neurological deficit, and apoptotic cell death. Western blotting was used to determine the protein expression of autophagy and apoptosis, while mRNA expression of apoptotic molecules was detected by real-time PCR. Results NBO treatment after ischemia/reperfusion significantly decreased infarct volume and neurobehavioral defects. The increased expression of the autophagy markers, including microtubule-associated protein 1A light chain 3 (LC3) and Beclin 1, after ischemia/reperfusion was reversed by NBO, while promoting Sequestosome 1 (p62/SQSTM1) expression. In addition, NBO reduced cerebral apoptosis in association with alleviated BAX expression and increased BCL-2 expression. 3-MA reduced autophagy and apoptotic death but did not further improve NBO-attenuated ischemic damage. Conclusion NBO induced remarkable neuroprotection from ischemic injury, which was correlated with blocked autophagy activity.
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Kong WS, Shen FX, Xie RF, Zhou G, Feng YM, Zhou X. Bufothionine induces autophagy in H22 hepatoma-bearing mice by inhibiting JAK2/STAT3 pathway, a possible anti-cancer mechanism of cinobufacini. JOURNAL OF ETHNOPHARMACOLOGY 2021; 270:113848. [PMID: 33485977 DOI: 10.1016/j.jep.2021.113848] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 01/11/2021] [Accepted: 01/14/2021] [Indexed: 05/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Cinobufacini is extracted from the skins and parotid venom glands of the toad for treating symptoms like swelling and pain in ancient times. Nowadays, cinobifucini injection has also achieved satisfactory therapeutic effects on hepatocellular carcinoma (HCC) in China. AIM OF THE STUDY Our previous work found that bufothionine, an alkaloid abundant in cinobufacini injection, induced mitochondria-mediated apoptosis. In this work, the underlying effects of bufothionine on autophagy in HCC and its possible dependent pathway were investigated. METHODS CCK-8 and Hoechst staining assays were performed to verify effects of drugs on proliferation and apoptosis of SMMC7721 cell. H22-tumor-bearing mice model was established by inoculating ascites fluid. HE staining was used to observe pathological changes in liver and tumor tissues. ELISA and Western blot experiments were conducted to investigate IL-6/JAK2/STAT3 signaling pathway. The effects of drugs on expressions of autophagic relative proteins were investigated by Western blot in vitro and in vivo. RESULTS In vitro, CCK-8 and Hoechst staining assays showed that bufothionine inhibited SMMC7721 cell proliferation and promoted apoptosis at 100 μM. In vivo, bufothionine relieved symptoms of H22-tumor-bearing mice and exerted anti-inflammation activity. ELISA and Western blot demonstrated that bufothionine significantly reduced serum IL-6 concentration, suppressed p-Stat3tyr705, p-Stat3ser727 and Jak2 expressions in tumor tissues and upregulated Atg5, Atg7 and LC3Ⅱ expressions in SMMC7721 cell and H22 tumor. CONCLUSION This is the first report showing that bufothionine might induce autophagy in HCC by inhibiting JAK2/STAT3 pathway, presenting a possible anti-cancer mechanism of bufothionine in cinobufacini injection.
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Affiliation(s)
- Wei-Song Kong
- Department of Pharmacy, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
| | - Fang-Xue Shen
- Department of Pharmacy, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
| | - Rui-Fang Xie
- Department of Pharmacy, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
| | - Gui Zhou
- Department of Pharmacy, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
| | - Yi-Ming Feng
- Department of Pharmacy, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
| | - Xin Zhou
- Department of Pharmacy, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China.
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Zheng J, Wei S, Xiao T, Li G. LC3B/p62-mediated mitophagy protects A549 cells from resveratrol-induced apoptosis. Life Sci 2021; 271:119139. [PMID: 33539914 DOI: 10.1016/j.lfs.2021.119139] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 12/29/2020] [Accepted: 01/14/2021] [Indexed: 02/05/2023]
Abstract
AIMS Complicated mechanisms in cancer cells have been restricting the medicinal value of resveratrol (Res). The mechanisms by which Res exerts its anti-tumor activity in lung cancer cells have diverged among reports in recent years, whether cells choose to undergo autophagic cell death or apoptosis remains controversial. Yet, whether Res-induced autophagic cell death transforms into apoptosis is still unknown, and by which autophagy regulates programmed cell death is still undefined. MAIN METHODS Here, A549 cells were treated with Res to investigate the mechanisms of autophagy and apoptosis using western blot, immunofluorescence staining for LC3B. KEY FINDINGS Non-canonical autophagy was induced by Res-treatment in a Beclin-1- and ATG5-independent manner, with apoptosis being activated simultaneously. Autophagy induced by Res was activated by rapamycin with decreased apoptosis, suggesting that autophagy may serve as a protective pathway in cells. Mitophagy was found to be induced by Res using fluorescence co-localization of mitochondria with lysosomes. Subsequently, it was identified that mitophagy was mediated by LC3B/p62 interaction and could be inhibited by LC3B knockout and p62 knockdown following increased apoptosis. SIGNIFICANCE In conclusion, the current results demonstrate that Res-induced non-canonical autophagy in A549 lung cancer cells with apoptosis activation simultaneously, while LC3B/p62-mediated mitophagy protects tumor cells against apoptosis, providing novel mechanisms about the critical role of mitophagy in regulating cell fate.
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Affiliation(s)
- Jiahua Zheng
- Open Laboratory for Tumor Molecular Biology/Department of Biochemistry/The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College, Xinling Road 22, Shantou, China
| | - Shaochai Wei
- Open Laboratory for Tumor Molecular Biology/Department of Biochemistry/The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College, Xinling Road 22, Shantou, China
| | - Tingting Xiao
- Open Laboratory for Tumor Molecular Biology/Department of Biochemistry/The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College, Xinling Road 22, Shantou, China
| | - Guanwu Li
- Open Laboratory for Tumor Molecular Biology/Department of Biochemistry/The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College, Xinling Road 22, Shantou, China.
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Paeoniflorin Attenuates Dexamethasone-Induced Apoptosis of Osteoblast Cells and Promotes Bone Formation via Regulating AKT/mTOR/Autophagy Signaling Pathway. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:6623464. [PMID: 33880124 PMCID: PMC8046541 DOI: 10.1155/2021/6623464] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 02/21/2021] [Accepted: 03/26/2021] [Indexed: 01/04/2023]
Abstract
Paeoniflorin, a natural product derived from Paeonia lactiflora, possesses diverse pharmacological activities such as anti-inflammatory, antitumor, and antidiabetic effects. It has been reported for promoting osteoblastogenesis and inhibiting osteoclastogenesis. This study investigates the therapeutic effects of paeoniflorin in glucocorticoid-induced osteoporosis (GIOP) in vitro and in vivo. MC3T3-E1 cells were incubated with dexamethasone (DEX; 200 μM) and/or paeoniflorin (10 μM), followed by the investigation of cell proliferation, differentiation, mineralization, apoptosis, and autophagy. The AKT activator SC79 was used for evaluating the involvement of the AKT/mTOR signaling pathway. After DEX pretreatments, paeoniflorin promoted osteoblast differentiation and mineralization characterized by increase in Runx2, ALP, beclin-1, and LC3-II/LC3-I ratio levels and a decrease in apoptosis. The autophagy-promoting effects of paeoniflorin were reversed by SC79. C57BL/6 mice were given DEX (1 mg/kg) once daily and paeoniflorin (15 mg/kg) 48 hours for a total of 8 weeks followed by the investigation of histological changes, the trabecular bone microarchitecture, and the levels of bone turnover markers. The results showed that paeoniflorin increased alkaline phosphatase (ALP) activity and upregulated the expression of osteocalcin and beclin-1 but reduced the levels of Bax and C-terminal telopeptide of type I collagen (CTX-1). Thus, paeoniflorin may alleviate DEX-induced osteoporosis by promoting osteogenic differentiation and autophagy via inhibition of the AKT/mTOR signaling pathway.
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Yuan X, Chen G, Guo D, Xu L, Gu Y. Polydatin Alleviates Septic Myocardial Injury by Promoting SIRT6-Mediated Autophagy. Inflammation 2021; 43:785-795. [PMID: 32394287 DOI: 10.1007/s10753-019-01153-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Sepsis is a life-threatening condition. Polydatin (PD), a small natural compound from Polygonum cuspidatum, possesses antioxidant and anti-inflammatory properties. However, the protective mechanism of PD on sepsis-induced acute myocardial damage is still unclear. The aim of this study was to investigate the effect and mechanism of action of PD on lipopolysaccharide (LPS)-induced H9c2 cells and in a rat model of sepsis, and explored the role of PD-upregulated sirtuin (SIRT)6. LPS-induced H9c2 cells were used to simulate sepsis. Cecal ligation and puncture (CLP)-induced sepsis in rats were used to verify the protective effect of PD. ELISA, western blotting, immunofluorescence, immunohistochemistry, and flow cytometry were used to study the protective mechanism of PD against septic myocardial injury. PD pretreatment suppressed LPS-induced H9c2 cell apoptosis by promotion of SIRT6-mediated autophagy. Downregulation of SIRT6 or inhibition of autophagy reversed the protective effect of PD on LPS-induced apoptosis. PD pretreatment also suppressed LPS-induced inflammatory factor expression. CLP-induced sepsis in rats showed that PD pretreatment decreased CLP-induced myocardial apoptosis and serum tumor necrosis factor-α, interleukin (IL)-1β, and IL-6 expression. 3-Methyladenine (autophagy inhibitor) pretreatment prevented the protective effect of PD on septic cardiomyopathy. SIRT6 expression was increased with PD treatment, which confirmed that PD attenuates septic cardiomyopathy by promotion of SIRT6-mediated autophagy. All these results indicate that PD has potential therapeutic effects that alleviate septic myocardial injury by promotion of SIRT6-mediated autophagy.
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Affiliation(s)
- Xiaoyan Yuan
- Department of Emergency Medicine, Shanghai Gongli Hospital, 219 Miao-Pu Road, Shanghai, 200135, China.,Ningxia Medical University, No.1160, Shengli Street, Xingqing District, Yinchuan, Ningxia, 750004, China
| | - Guo Chen
- Department of Emergency Medicine, Shanghai Gongli Hospital, 219 Miao-Pu Road, Shanghai, 200135, China
| | - Dongfeng Guo
- Department of Emergency Medicine, Shanghai Gongli Hospital, 219 Miao-Pu Road, Shanghai, 200135, China.
| | - Lei Xu
- Department of Emergency Medicine, Shanghai Gongli Hospital, 219 Miao-Pu Road, Shanghai, 200135, China.
| | - Yongfeng Gu
- Department of Emergency Medicine, Shanghai Gongli Hospital, 219 Miao-Pu Road, Shanghai, 200135, China.
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Dai H, Ma B, Dai X, Pang J, Wang J, Zhao Y, Wang M, Zhang H, Gao H, Qian S, Tian F, Sun X. Shengma Biejia Decoction Inhibits Cell Growth in Multiple Myeloma by Inducing Autophagy-Mediated Apoptosis Through the ERK/mTOR Pathway. Front Pharmacol 2021; 12:585286. [PMID: 33854428 PMCID: PMC8039907 DOI: 10.3389/fphar.2021.585286] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 02/08/2021] [Indexed: 12/19/2022] Open
Abstract
Shengma Biejia decoction (SMBJD), a traditional Chinese formula recorded in the Golden Chamber, has been widely used for the treatment of malignant tumors. However, its underlying molecular targets and mechanisms are still unclear. This study showed that SMBJD inhibited tumor growth and stimulated hemogram recovery significantly in a multiple myeloma xenograft model. Western blot and immunohistochemistry assays of tumor tissues showed that SMBJD reduced the ratio of autophagy-related proteins LC3-II/LC3-I, while P62 and apoptosis-related proteins cleaved caspase-3/caspase-3 and Bax/Bcl-2 were upregulated. In vitro experiments demonstrated the time-dependent and dose-dependent cytotoxicity of SMBJD on multiple myeloma cell lines H929 and U266 through MTT assays. The LC3-II/LC3-I ratio and number of GFP-LC3 puncta showed that SMBJD inhibited the autophagy process of H929 and U266 cells. Moreover, both SMBJD and 3-methyladenine (3-MA) caused a decrease in LC3-II/LC3-I, and SMBJD could not reverse the upregulation of LC3-II/LC3-I caused by bafilomycin A1 (Baf-A1). Furthermore, the results of annexin V-FITC and propidium iodide double staining demonstrated that SMBJD treatment induced the apoptosis of H929 and U266 cells. These data prove that SMBJD inhibits autophagy and promotes apoptosis in H929 and U266 cells. The results also show that rapamycin could reduce the rate of SMBJD-induced apoptosis in H929 and U266 cells, at a concentration which had no effect on apoptosis but activated autophagy. In addition, analysis of the mechanism indicated that levels of phosphorylated ERK and phosphorylated mTOR were increased by treatment with SMBJD in vivo and in vitro. These results indicate that SMBJD, an old and effective herbal compound, could inhibit the viability of H929 and U266 cells and induce autophagy-mediated apoptosis through the ERK/mTOR pathway. Thus, it represents a potential therapy strategy for multiple myeloma.
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Affiliation(s)
- Huibo Dai
- Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Bangyun Ma
- Department of Hematology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Xingbin Dai
- Department of Hematology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Jie Pang
- Department of Hematology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Jingyu Wang
- Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Yandong Zhao
- Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Mengya Wang
- Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Hong Zhang
- Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Haoran Gao
- Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Shushu Qian
- Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Fang Tian
- Research Center of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Xuemei Sun
- Department of Hematology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
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Liu J, Qin X, Ma W, Jia S, Zhang X, Yang X, Pan D, Jin F. Corilagin induces apoptosis and autophagy in NRF2‑addicted U251 glioma cell line. Mol Med Rep 2021; 23:320. [PMID: 33760110 PMCID: PMC7974271 DOI: 10.3892/mmr.2021.11959] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 11/25/2020] [Indexed: 02/07/2023] Open
Abstract
Corilagin, extracted from the Euphorbiaceae and Phyllanthus plants, inhibits the growth of a number of types of tumors. Compared with temozolomide, the traditional chemotherapy drug, corilagin has demonstrated stronger antitumor activity. However, the pharmaceutical mechanism of corilagin in glioma remains unclear. Nuclear factor erythroid 2 like 2 (NFE2L2 or NRF2) is positively associated with several types of tumor including glioma. In the present study, NRF2 expression was higher in glioma tissues compared with non-glioma specimens. Therefore, it was hypothesized that corilagin targets NRF2 regulation of U251 cell apoptosis. The present study used Hoechst 33258 staining to demonstrate that corilagin induced glioma cell apoptosis and observed that the expression of the apoptosis-related gene Bcl-2 was reduced. In addition, corilagin induced autophagy and promoted the conversion of light chain 3 (LC3) protein from LC3I to LC3II. NRF2 expression was downregulated by corilagin stimulation. Furthermore, the gene expression pattern following knockdown of NRF2 in U251 cells using siRNA was consistent with corilagin stimulation. Therefore, it was preliminarily concluded that corilagin induces apoptosis and autophagy by reducing NRF2 expression.
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Affiliation(s)
- Jilan Liu
- Department of Central Laboratory, Affiliated Hospital of Jining Medical University, Jining, Shandong 272029, P.R. China
| | - Xianyun Qin
- Department of Central Laboratory, Affiliated Hospital of Jining Medical University, Jining, Shandong 272029, P.R. China
| | - Wenyuan Ma
- Department of Neurosurgery, Affiliated Hospital of Jining Medical University, Jining, Shandong 272029, P.R. China
| | - Shu Jia
- Department of Central Laboratory, Affiliated Hospital of Jining Medical University, Jining, Shandong 272029, P.R. China
| | - Xiaobei Zhang
- Department of Central Laboratory, Affiliated Hospital of Jining Medical University, Jining, Shandong 272029, P.R. China
| | - Xinlin Yang
- Department of Orthopaedic Surgery, Orthopaedic Research Labs, University of Virginia, Charlottesville, VA 22908, USA
| | - Dongfeng Pan
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA 22908, USA
| | - Feng Jin
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA 22908, USA
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Galectin-1 Inhibited LPS-Induced Autophagy and Apoptosis of Human Periodontal Ligament Stem Cells. Inflammation 2021; 44:1302-1314. [PMID: 33566256 DOI: 10.1007/s10753-021-01417-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 12/23/2020] [Accepted: 01/05/2021] [Indexed: 10/22/2022]
Abstract
Periodontitis is a widespread human chronic inflammatory disease of the tooth-surrounding tissues, which induces the destruction of periodontium and pathologic loss of teeth among adults. It has been reported that interleukin (IL)-17 was significantly increased in periodontitis patients compared to controls, while galectin-1 (Gal-1) was lower. Interestingly, it is found that Gal-1 treatment reduced systemic IL-17 levels. Hence, the aim of the present study was to explore the effect of Gal-1 on periodontitis development and investigate its underlying mechanism. In this study, Gal-1 was poorly expressed in lipopolysaccharide (LPS)-induced human periodontal ligament stem cells (hPDLSCs), and Gal-1 overexpression attenuated the production of inflammatory cytokines induced by LPS. Moreover, Gal-1 overexpression alleviated LPS-induced cell autophagy and apoptosis and reduced the expressions of IL-17A and IL-17R. Interestingly, IL-17A reversed the effect of Gal-1 on cell autophagy, inflammation, and cell apoptosis induced by the LPS challenge. In conclusion, Gal-1 inhibited LPS-induced autophagy and apoptosis of hPDLSC via regulation of IL-17A expression. Therefore, Gal-1 may have promising potential in regenerating periodontium.
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Lin M, Hua R, Ma J, Zhou Y, Li P, Xu X, Yu Z, Quan S. Bisphenol A promotes autophagy in ovarian granulosa cells by inducing AMPK/mTOR/ULK1 signalling pathway. ENVIRONMENT INTERNATIONAL 2021; 147:106298. [PMID: 33387880 DOI: 10.1016/j.envint.2020.106298] [Citation(s) in RCA: 80] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/20/2020] [Accepted: 11/20/2020] [Indexed: 06/12/2023]
Abstract
BACKGROUND Bisphenol A (BPA) is a widespread endocrine-disrupting chemical with estrogen like effects, which could interfere with the human reproductive system by disrupting the normal function of granulosa cells (GCs) leading to abnormal ovarian function. However, the mechanism of its toxicity on human GCs has not been clearly described thus far. METHODS 106 normogonadotropic infertile women undergoing their first in-vitro fertilization-embryo transfer (IVF-ET) cycle were recruited. Urinary BPA level and the early outcomes of IVF-ET were analysed. Patients were divided to low and high BPA exposure groups using the median urinary BPA concentration as the cut-off value. In-vivo and in-vitro studies were conducted using mice and human granulosa cell line (KGN cells). Female Kunming mice approximately 6-8 weeks of age were poisoned with BPA at different dosages (1, 10 or 100 μg/kg) by oral gavage once daily for 2 weeks, while KGN cells were exposed to BPA at the concentration of 1, 10 or 100 nM for 24 h, 48 h or 72 h. BPA-induced ovarian morphologic changes were analysed by histopathology investigation. Cell viability and apoptosis were evaluated using CCK-8, TUNEL and flowcytometric, respectively. Hormone levels were determined using ELISA and the molecular mechanism studies were conducted using immunofluorescence, RT-PCR and western blots. RESULTS The oocyte retrieval rate, maturation rate and embryo implantation rate significantly decreased with the higher level of urinary BPA concentration. Peak E2 level was lower in high BPA group, but no statistical significance could be observed. In BPA treated mice, cystic dilation of the follicles with a decreased number of GCs could be observed histopathologically. Decreased E2, P4 and AMH level and GCs autophagy could be detected both in-vivo and in-vitro with the activation of AMPK/mTOR/ULK1 signalling pathway. As being confirmed in KGN cells, phosphorylated AMPK and ULK1 increased while phosphorylated mTOR decreased, and by inhibition autophagy using knockdown of AMPK or 3-MA, adverse effects of BPA exposure in-vitro could be reversed. CONCLUSION BPA exposure might abnormally influence human ovarian functions leading to abnormal folliculogenesis by activation of autophagy in GCs through AMPK/mTOR/ULK1 pathway.
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Affiliation(s)
- Miaoling Lin
- Department of Obstetrics and Gynaecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China; Center for Reproductive Medicine, Department of Obstetrics and Gynaecology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, China
| | - Rui Hua
- Department of Obstetrics and Gynaecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Jing Ma
- Department of Obstetrics and Gynaecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Yao Zhou
- Department of Obstetrics and Gynaecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Pei Li
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Xiya Xu
- Department of Obstetrics and Gynaecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Zhiqiang Yu
- State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environment and Resources, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
| | - Song Quan
- Department of Obstetrics and Gynaecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
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Zhang H, Chen F, Li Y, Shan X, Yin L, Hao X, Zhong Y. More serious autophagy can be induced by ZnO nanoparticles than single-walled carbon nanotubes in rat tracheal epithelial cells. ENVIRONMENTAL TOXICOLOGY 2021; 36:238-248. [PMID: 32951350 DOI: 10.1002/tox.23029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/24/2020] [Accepted: 09/06/2020] [Indexed: 06/11/2023]
Abstract
Metal oxide nanoparticles and carbon nanoparticles, as common nanoparticles (NPs), can cause autophagy in certain cells, which will lead to biohealth risk issues. This study determined the difference in autophagy induced by zinc oxide nanoparticles (ZnO NPs) and single-walled carbon nanotubes (SWCNTs) in respiratory epithelial cells. ICP-OES results showed that NPs uptake as well as the intercellular contents of particles affected cytotoxicity in a dose-dependent manner. ZnO NPs-30 nm had a distinct green dot structure representing autophagy, the SWCNTs exposure group had a few green light spots at a concentration of 10 μg/L. The ROS content of the ZnO NP-30 nm exposure group had the greatest increase at a concentration of 1000 μg/L, which was 2.5 times higher than that of the control, the SWCNTs exposure group showed a 2.2-fold increase. A slight downregulation of p-mTOR was detected, and the ZnO NPs-30 nm treatment group had the significant downregulation rate. The gene and protein expression levels of Beclin-1 and LC3B were upregulated as the exposure concentration increased. The protein expression of Beclin-1 and LC3B in the 1000 μg/L ZnO NPs-30 nm exposure group were 5.21 times and 4.12 times that of the control, respectively. The mRNA expression of Beclin-1 and LC3B in the 1000 μg/L ZnO NPs-30 nm exposure group were 5.04 times and 3.61 times that of the control, respectively. At any concentration, the effect of ZnO NPs-30 nm was greater than that of the SWCNTs. Interaction and crosstalk analysis showed that exposure to ZnO NPs-30 nm caused autophagy through the aggregation of undegraded autophagosomes, whereas SWCNTs exposure induced diminished intercellular oxidative stress to inhibit autophagy. Therefore, this study demonstrated that the effects of autophagy induced by ZnO NPs-30 nm and SWCNTs were different. The health risks of ZnO-30 nm NPs are higher than those of SWCNTs.
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Affiliation(s)
- Hangjun Zhang
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
| | - Feifei Chen
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
| | - Yan Li
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
| | - Xiaodong Shan
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
| | - Lu Yin
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
| | - Xiaojing Hao
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
| | - Yuchi Zhong
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang Province, China
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Antiproliferative Activity on Human Colon Adenocarcinoma Cells and In Vitro Antioxidant Effect of Anthocyanin-Rich Extracts from Peels of Species of the Myrtaceae Family. Molecules 2021; 26:molecules26030564. [PMID: 33498977 PMCID: PMC7865521 DOI: 10.3390/molecules26030564] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/08/2021] [Accepted: 01/10/2021] [Indexed: 12/12/2022] Open
Abstract
There is a significant indication of the beneficial health effects of fruit rich diets. Fruits of native plant species have noticeably different phytochemicals and bioactive effects. The aim of this work was to characterize and compare the constituents of jabuticaba (Myrciaria jaboticaba, MJ), jamun-berry (Syzygium cumini, SC), and malay-apple (Syzygium malaccense, SM) extracts and their influence on antioxidant activity in vitro and antiproliferative effects on human colon adenocarcinoma cells. According to the results, dried peel powders (DP) have a high anthocyanin content, phenolic compounds, and antioxidant activity when compared to freeze dried extracts (FD). M. jaboticaba dried peel powder extract had a higher total anthocyanin and phenolic compounds content (802.90 ± 1.93 and 2152.92 ± 43.95 mg/100 g, respectively). A reduction in cell viability of HT-29 cells after treatment with M. jaboticaba extracts (DP-MJ and FD-MJ) was observed via MTT assay. Flow cytometry showed that the treatment with the anthocyanin-rich extracts from MJ, SC, and SM had an inhibitory impact on cell development due to G2/M arrest and caused a rise in apoptotic cells in relation to the control group. The findings of this study highlight the potential of peel powders from Myrtaceae fruits as an important source of natural antioxidants and a protective effect against colon adenocarcinoma.
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Acetyl-L-Carnitine Induces Autophagy to Promote Mouse Spermatogonia Cell Recovery after Heat Stress Damage. BIOMED RESEARCH INTERNATIONAL 2021; 2021:8871328. [PMID: 33532499 PMCID: PMC7837762 DOI: 10.1155/2021/8871328] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 12/20/2020] [Accepted: 01/04/2021] [Indexed: 11/29/2022]
Abstract
Acetyl-L-carnitine (ALC) is an effective substrate for mitochondrial energy metabolism and is known to prevent neurodegeneration and attenuate heavy metal-induced injury. In this study, we investigated the function of ALC in the recovery of mouse spermatogonia cells (GC-1 cells) after heat stress (HS). The cells were randomly divided into three groups: control group, HS group (incubated at 42°C for 90 min), and HS + ALC group (treatment of 150 μM ALC after incubated at 42°C for 90 min). After heat stress, all of the cells were recovered at 37°C for 6 h. In this study, the content of intracellular lactate dehydrogenase (LDH) in the cell supernatant and the malondialdehyde (MDA) levels, catalase (CAT) levels, and total antioxidant capacity (T-AOC) were significantly increased in the HS group compared to the CON group. In addition, the mitochondrial membrane potential (MMP) was markedly decreased, while the apoptosis rate and the expression of apoptosis-related genes (Bcl-2, Bax, and caspase3) were significantly increased in the HS group compared to the CON group. Furthermore, the number of autophagosomes and the expression of autophagy-related genes (Atg5, Beclin1, and LC3II) and protein levels of p62 were increased, but the expression of LAMP1 was decreased in the HS group compared to the CON group. However, treatment with ALC remarkably improved cell survival and decreased cell oxidative stress. It was unexpected that levels of autophagy were markedly increased in the HS + ALC group compared to the HS group. Taken together, our present study evidenced that ALC could alleviate oxidative stress and improve the level of autophagy to accelerate the recovery of GC-1 cells after heat stress.
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75
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Fang S, Wan X, Zou X, Sun S, Hao X, Liang C, Zhang Z, Zhang F, Sun B, Li H, Yu B. Arsenic trioxide induces macrophage autophagy and atheroprotection by regulating ROS-dependent TFEB nuclear translocation and AKT/mTOR pathway. Cell Death Dis 2021; 12:88. [PMID: 33462182 PMCID: PMC7814005 DOI: 10.1038/s41419-020-03357-1] [Citation(s) in RCA: 88] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 12/14/2020] [Accepted: 12/16/2020] [Indexed: 01/30/2023]
Abstract
Inducing autophagy and inhibiting apoptosis may provide a therapeutic treatment for atherosclerosis (AS). For the treatment of progressive AS, arsenic trioxide (ATO) has been used to coat vascular stents. However, the effect of ATO on autophagy of macrophages is still unknown. Therefore, the aims of this study were to characterize the effects and the mechanism of actions of ATO on autophagy in macrophages. Our results showed that ATO-induced activation of autophagy was an earlier event than ATO-induced inhibition of the expression of apoptosis markers in macrophages and foam cells. Nuclear transcription factor EB (TFEB) prevents atherosclerosis by activating macrophage autophagy and promoting lysosomal biogenesis. Here, we report that ATO triggered the nuclear translocation of TFEB, which in turn promoted autophagy and autophagosome-lysosome fusion. Both the latter events were prevented by TFEB knockdown. Moreover, ATO decreased the p-AKT and p-mTOR in the PI3K/AKT/mTOR signaling pathway, thus inducing autophagy. Correspondingly, treatment with the autophagy inhibitor 3-methyladenine (3-MA) abolished the autophagy-inducing effects of ATO. Meanwhile, PI3K inhibitor (LY294002) and mTOR inhibitor (rapamycin) cooperated with ATO to induce autophagy. Furthermore, reactive oxygen species (ROS) were generated in macrophages after treatment with ATO. The ROS scavenger N-acetyl-1-cysteine (NAC) abolished ATO-induced nuclear translocation of TFEB, as well as changes in key molecules of the AKT/mTOR signaling pathway and downstream autophagy. More importantly, ATO promoted autophagy in the aorta of ApoE-/- mice and reduced atherosclerotic lesions in early AS, which were reversed by 3-MA treatment. In summary, our data indicated that ATO promoted ROS induction, which resulted in nuclear translocation of TFEB and inhibition of the PI3K/AKT/mTOR pathway. These actions ultimately promoted macrophage autophagy and reduced atherosclerotic lesions at early stages. These findings may provide a new perspective for the clinical treatment of early-stage atherosclerosis and should be further studied.
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Affiliation(s)
- Shaohong Fang
- Department of Cardiology, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Harbin, Heilongjiang, China
| | - Xin Wan
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Harbin, Heilongjiang, China
- Department of Neurobiology, School of Basic Medical Sciences, Harbin Medical University, Harbin, Heilongjiang, China
| | - Xiaoyi Zou
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Harbin, Heilongjiang, China
- Department of Neurobiology, School of Basic Medical Sciences, Harbin Medical University, Harbin, Heilongjiang, China
| | - Song Sun
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Harbin, Heilongjiang, China
- Department of Neurobiology, School of Basic Medical Sciences, Harbin Medical University, Harbin, Heilongjiang, China
| | - Xinran Hao
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Harbin, Heilongjiang, China
- Department of Neurobiology, School of Basic Medical Sciences, Harbin Medical University, Harbin, Heilongjiang, China
| | - Chenchen Liang
- Department of Cardiology, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Harbin, Heilongjiang, China
| | - Zhenming Zhang
- Department of Cardiology, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Harbin, Heilongjiang, China
| | - Fangni Zhang
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Harbin, Heilongjiang, China
- Department of Neurobiology, School of Basic Medical Sciences, Harbin Medical University, Harbin, Heilongjiang, China
| | - Bo Sun
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Harbin, Heilongjiang, China
- Department of Neurobiology, School of Basic Medical Sciences, Harbin Medical University, Harbin, Heilongjiang, China
| | - Hulun Li
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Harbin, Heilongjiang, China.
- Department of Neurobiology, School of Basic Medical Sciences, Harbin Medical University, Harbin, Heilongjiang, China.
| | - Bo Yu
- Department of Cardiology, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China.
- The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Harbin, Heilongjiang, China.
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Li J, Chang X, Shang M, Niu S, Zhang W, Zhang B, Huang W, Wu T, Zhang T, Tang M, Xue Y. Mitophagy-lysosomal pathway is involved in silver nanoparticle-induced apoptosis in A549 cells. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 208:111463. [PMID: 33130480 DOI: 10.1016/j.ecoenv.2020.111463] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 09/05/2020] [Accepted: 10/01/2020] [Indexed: 05/11/2023]
Abstract
With the increasing use of silver nanoparticles (AgNPs) in biological materials, the cytotoxicity caused by these particles has attracted much attention. However, the molecular mechanism underlying AgNP cytotoxicity remains unclear. In this study, we aimed to systematically investigate the toxicity induced by AgNP exposure to the lung adenocarcinoma A549 cell line at the subcellular and signaling pathway levels and elucidate the related molecular mechanism. The survival rate of cells exposed to AgNPs at 0, 20, 40, 80, and 160 μg/mL for 24 or 48 h decreased in a dose- and time-dependent manner. AgNPs induced autophagy and mitophagy, determined by the transmission electron microscopy investigation and upregulation of LC3 II/I, p62, PINK1, and Parkin expression levels. AgNP treatment induced lysosomal injury, including the decline of lysosomal membrane integrity and increase in cathepsin B level. The decreased in mitochondrial membrane potential, along with upregulation of cytochrome c, caspases 9 and 3, and BAX/BCL2, further suggested that mitochondrial injury were involved in AgNP-induced apoptosis. In addition, mitochondrial injury may further lead to excessive production of reactive oxygen species and oxidative/ antioxidant imbalance. The results suggested that AgNPs could regulate autophagy via mitochondrial and lysosome injury in A549 cells. The information of the molecular mechanism will provide an experimental basis for the safe application of nanomaterials.
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Affiliation(s)
- Jiangyan Li
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Xiaoru Chang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Mengting Shang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Shuyan Niu
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Wenli Zhang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Bangyong Zhang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Wenyan Huang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Tianshu Wu
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Ting Zhang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Meng Tang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Yuying Xue
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China.
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Xiong H, Chen K, Li M. [Role of autophagy in lipopolysaccharide-induced apoptosis of odontoblasts]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2020; 40:1816-1820. [PMID: 33380391 DOI: 10.12122/j.issn.1673-4254.2020.12.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To investigate the role of autophagy in lipopolysaccharide (LPS)-induced apoptosis of murine odontoblasts. METHODS Murine odontoblasts (mDPC-23 cells) were treated with 5 μg/mL LPS for 6, 12 and 24 h, and the changes in cell viability was examined using CCK8 kit and cell apoptosis was detected by TUNEL staining. The changes in the protein levels of LC3, Beclin1, Atg5, AKT, p-AKT, mTOR and p-mTOR were detected using Western blotting. The effect of 3-MA treatment for 24 h on LPS-induced apoptosis of mDPC-23 cells was evaluated by detecting the expressions of apoptosis-related proteins caspase-3 and Bax using Western blotting. RESULTS Stimulation with LPS for 6 and 12 h did not cause significant changes in the proliferation or apoptosis of mDPC-23 cells, but LPS treatment for 24 h significantly suppressed cell proliferation (P < 0.05) and promoted cell apoptosis as shown by TUNEL assay (P < 0.05). Stimulation with LPS for 24 significantly increased the expression levels of LC3, Beclin1 and Atg5, decreased the expressions of p-AKT and p-mTOR (P < 0.05), and obviously upregulated the expressions of caspase-3 and Bax (P < 0.05). Treatment with 3-MA markedly lowered caspase-3 and Bax protein expressions in LPS-stimulated cells (P < 0.05). CONCLUSIONS LPS stimulation induces autophagy to promote apoptosis of mDPC-23 cells, and suppression of autophagy attenuates LPS-induced apoptosis. Autophagy may play an important role in the injury of inflamed pulp tissues.
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Affiliation(s)
- Huacui Xiong
- Stomatological Hospital, Southern Medical University, Guangzhou 510115, China
| | - Ke Chen
- Stomatological Hospital, Southern Medical University, Guangzhou 510115, China
| | - Meimei Li
- Stomatological Hospital, Southern Medical University, Guangzhou 510115, China
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78
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Han W, Yu F, Cao J, Dong B, Guan W, Shi J. Valproic Acid Enhanced Apoptosis by Promoting Autophagy Via Akt/mTOR Signaling in Glioma. Cell Transplant 2020; 29:963689720981878. [PMID: 33356493 PMCID: PMC7873763 DOI: 10.1177/0963689720981878] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Glioma is the most common malignant tumor in the central nervous system with a poor median survival. Valproic acid (VPA), a widely used antiepileptic drug, has been found to have antitumor effects on gliomas, but its role still has not been determined. In this study, we investigated VPA-induced apoptotic and autophagic effects on human U251 and SNB19 cells by cell counting kit-8 assay, flow cytometry, terminal deoxynucleotidyl transferase-mediated nick end labeling staining, western blots, and immunofluorescence assay in vitro, and then we further explored the role of autophagy in apoptosis by using the selective antagonist MHY1485. The data showed that VPA inhibited U251 and SNB19 glioma cells viability in a dose-dependent and time-dependent manner and induced apoptosis through the mitochondria-dependent pathway in vitro. In addition, VPA activated the Akt/mTOR pathway by decreasing their protein phosphorylation to promote cellular apoptosis. Surprisingly, the mTOR agonist MHY1485, causing a strong elevation of mTOR activity, partially reduced apoptosis ratio, which supposing that the autophagy of VPA is involved in the regulation of apoptosis. These findings suggest that VPA enhanced apoptosis by promoting autophagy via Akt/mTOR signaling in glioma, which could be further evaluated as a reliable therapy for glioma.
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Affiliation(s)
- Wei Han
- Department of Neurosurgery, The Third Affiliated Hospital of Soochow University, Changzhou, China.,Both the authors contributed equally to this article
| | - Fan Yu
- Department of Endocrinology, The Third Affiliated Hospital of Soochow University, Changzhou, China.,Both the authors contributed equally to this article
| | - Jiachao Cao
- Department of Neurosurgery, The Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Bo Dong
- Department of Neurosurgery, The Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Wei Guan
- Department of Neurosurgery, The Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Jia Shi
- Department of Neurosurgery, The Third Affiliated Hospital of Soochow University, Changzhou, China
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79
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Xue J, Gruber F, Tschachler E, Zhao Y. Crosstalk between oxidative stress, autophagy and apoptosis in hemoporfin photodynamic therapy treated human umbilical vein endothelial cells. Photodiagnosis Photodyn Ther 2020; 33:102137. [PMID: 33307232 DOI: 10.1016/j.pdpdt.2020.102137] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 11/18/2020] [Accepted: 11/30/2020] [Indexed: 01/07/2023]
Abstract
BACKGROUND Photodynamic therapy (PDT) provides a treatment for port-wine stain (PWS) using hemoporfin (hematoporphyrin monomethyl ether, HMME), a novel photosensitizer, reporting better efficacy and lower recurrence rate. This study investigated the effects of HMME-PDT on human umbilical vein endothelial cells (HUVECs) as well as underlying mechanisms. METHODS Cell proliferation ability was measured by CCK8 assay and cell apoptosis was determined by TUNEL assay and Western blot analysis. Confocal fluorescence microscopy monitoring RFP-GFP-LC3 transfected HUVECs and Western blot analysis were used to evaluate autophagy. 3-Methyladenine (3-MA), Z-VAD-FMK, N-acetylcysteine (NAC) were used for inhibitor studies. RESULTS HMME-PDT decreased cell proliferation ability in an HMME concentration and light dose-dependent manner. Oxidative stress played an important role in HMME-PDT induced cell apoptosis and autophagy in HUVECs. Pretreatment with Z-VAD-FMK, the inhibitor of apoptosis, enhanced HMME-PDT induced autophagy. 3-MA, the suppressor of autophagy, significantly increased HMME-PDT induced apoptosis rates. CONCLUSIONS Our study demonstrated that HMME-PDT induced both apoptosis and autophagy in HUVECs via oxidative stress. Our data suggested that HMME-PDT- induced autophagy was able to prevent apoptotic cell death of HUVECs and rendered them more resistant to HMME-PDT induced toxicity.
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Affiliation(s)
- Jingwen Xue
- Department of Dermatology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, China
| | - Florian Gruber
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Erwin Tschachler
- Department of Dermatology, Medical University of Vienna, Vienna, Austria.
| | - Yi Zhao
- Department of Dermatology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, China.
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80
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He SD, Huang SG, Zhu HJ, Luo XG, Liao KH, Zhang JY, Tan N, Li DY. Oridonin suppresses autophagy and survival in rheumatoid arthritis fibroblast-like synoviocytes. PHARMACEUTICAL BIOLOGY 2020; 58:146-151. [PMID: 31971852 PMCID: PMC7034059 DOI: 10.1080/13880209.2020.1711783] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 12/23/2019] [Accepted: 12/31/2019] [Indexed: 06/10/2023]
Abstract
Context: Oridonin exhibits various pharmacological and physiological activities, including antioxidant, antibacterial, anti-inflammatory, pro-apoptotic, anticancer and neurological effects. However, its role in rheumatoid arthritis (RA) is yet to be revealed.Objective: We evaluated the effects of oridonin on the survival and autophagy of RA-fibroblast-like synoviocytes (FLSs).Materials and methods: RA-FLSs were treated with oridonin at serial concentrations of 0, 2, 4, 6, 8 and 10 µg/mL for 24, 48 and 72 h. Then, cell proliferation and apoptosis were measured. A GFP-LC3 plasmid was transfected into the cells to determine autophagy.Results: Oridonin suppressed RA-FLS proliferation in a dose-dependent manner. The half maximal inhibitory concentrations (IC50) of oridonin at 24, 48 and 72 h were 8.28, 7.88 and 8.35 µg/mL, respectively. Treatment with oridonin for 24 h increased apoptosis by 4.1%, and increased the protein levels of Bax and cleaved caspase-3 but significantly decreased the levels of IL-1β in the culture supernatant (p < 0.05). In addition, 6 h of oridonin treatment significantly decreased the number of GFP-LC3 punctate dots and inhibited the protein levels of ATG5 and Beclin1 by 80.01% and 42.12%, respectively. Chloroquine (CQ) significantly reinforced the effects of oridonin on inhibition of autophagy, suppression of proliferation, and induction of apoptosis in RA-FLSs (p < 0.05).Conclusions: Our results indicate that treatment with oridonin in combination with CQ inhibits autophagy and cell proliferation and induces apoptosis in RA-FLSs more effectively than treatment oridonin alone. This finding indicates that oridonin is a potential therapeutic agent for RA.
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Affiliation(s)
- Shou-Di He
- Traditional Chinese Medicine Department of Rheumatism, Huazhong University of Science and Techology Union Shenzhen Hospital, Shenzhen Nanshan People's Hospital, Shenzhen, China
| | - Sheng-Guang Huang
- Traditional Chinese Medicine Department of Rheumatism, Huazhong University of Science and Techology Union Shenzhen Hospital, Shenzhen Nanshan People's Hospital, Shenzhen, China
| | - Hui-Jun Zhu
- Traditional Chinese Medicine Department of Rheumatism, Huazhong University of Science and Techology Union Shenzhen Hospital, Shenzhen Nanshan People's Hospital, Shenzhen, China
| | - Xiao-Guang Luo
- Traditional Chinese Medicine Department of Rheumatism, Huazhong University of Science and Techology Union Shenzhen Hospital, Shenzhen Nanshan People's Hospital, Shenzhen, China
| | - Kang-Han Liao
- Traditional Chinese Medicine Department of Rheumatism, Huazhong University of Science and Techology Union Shenzhen Hospital, Shenzhen Nanshan People's Hospital, Shenzhen, China
| | - Jie-Yao Zhang
- Traditional Chinese Medicine Department of Rheumatism, Huazhong University of Science and Techology Union Shenzhen Hospital, Shenzhen Nanshan People's Hospital, Shenzhen, China
| | - Ning Tan
- Traditional Chinese Medicine Department of Rheumatism, Huazhong University of Science and Techology Union Shenzhen Hospital, Shenzhen Nanshan People's Hospital, Shenzhen, China
| | - De-Yu Li
- Traditional Chinese Medicine Department of Rheumatism, Huazhong University of Science and Techology Union Shenzhen Hospital, Shenzhen Nanshan People's Hospital, Shenzhen, China
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Hou B, Liu S, Li E, Jiang X. Different Role of Raptor and Rictor in Regulating Rasfonin-Induced Autophagy and Apoptosis in Renal Carcinoma Cells. Chem Biodivers 2020; 17:e2000743. [PMID: 33155352 DOI: 10.1002/cbdv.202000743] [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: 09/08/2020] [Accepted: 11/05/2020] [Indexed: 01/18/2023]
Abstract
Both Raptor and Rictor are the key components in the complexes of mammalian target of rapamycin (mTOR), which play a vital role in mediating autophagy. Unlike mTOR, the regulatory role of either Raptor or Rictor in the regulation of autophagic process is relatively less explored. In present study, we found that rasfonin, which isolated from Talaromyces sp. 3656-A1 and was a fungal natural product, activated both caspase-dependent apoptosis and autophagy in ACHN, a renal carcinoma cell line. Knockdown of Raptor decreased both rasfonin-induced autophagic flux and PARP-1 cleavage, and in contrast, Rictor silencing increased apoptosis concomitantly enhancing rasfonin-induced autophagy. Unexpectedly, API-2, which was widely used as an inhibitor of Akt, promoted rasfonin-dependent autophagy in Raptor-depleted but not Rictor-deprived cells. Collectively, these results demonstrated that Raptor and Rictor could play a distinctly regulatory role in rasfonin-enhanced autophagy and apoptosis.
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Affiliation(s)
- Bolin Hou
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100039, P. R. China
| | - Shuchun Liu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, P. R. China
| | - Erwei Li
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, P. R. China
| | - Xuejun Jiang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, P. R. China
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Haghi A, Salemi M, Fakhimahmadi A, Mohammadi Kian M, Yousefi H, Rahmati M, Mohammadi S, Ghavamzadeh A, Moosavi MA, Nikbakht M. Effects of different autophagy inhibitors on sensitizing KG-1 and HL-60 leukemia cells to chemotherapy. IUBMB Life 2020; 73:130-145. [PMID: 33205598 DOI: 10.1002/iub.2411] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 10/15/2020] [Accepted: 11/01/2020] [Indexed: 02/06/2023]
Abstract
A little number of current autophagy inhibitors may have beneficial effects on the acute myeloid leukemia (AML) patients. However, there is a strong need to figure out which settings should be activated or inhibited in autophagy pathway to prevail drug resistance and also to improve current treatment options in leukemia. Therefore, this study aimed to compare the effects of well-known inhibitors of autophagy (as 3-MA, BafA1, and HCQ) in leukemia KG-1 and HL-60 cells exposed to arsenic trioxide (ATO) and/or all-trans retinoic acid (ATRA). Cell proliferation and cytotoxicity of cells were examined by MTT assay. Autophagy was studied by evaluating the development of acidic vesicular organelles, and the autophagosomes formation was investigated by acridine orange staining and transmission electron microscopy. Moreover, the gene and protein expressions levels of autophagy markers (ATGs, p62/SQSTM1, and LC-3B) were also performed by qPCR and western blotting, respectively. The rate of apoptosis and cell cycle were evaluated using flow cytometry. We compared the cytotoxic and apoptotic effects of ATO and/or ATRA in both cell lines and demonstrated that some autophagy markers upregulated in this context. Also, it was shown that autophagy blockers HCQ and/or BafA1 could potentiate the cytotoxic effects of ATO/ATRA, which were more pronounced in KG-1 cells compared to HL-60 cell line. This study showed the involvement of autophagy during the treatment of KG-1 and HL-60 cells by ATO/ATRA. This study proposed that therapy of ATO/ATRA in combination with HCQ can be considered as a more effective strategy for targeting leukemic KG-1 cells.
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Affiliation(s)
- Atousa Haghi
- Hematology Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran.,Young Researchers and Elite Club, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Mahdieh Salemi
- Hematology Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran.,Hematologic Malignancies Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Aila Fakhimahmadi
- Department of Molecular Medicine, Institute of Medical Biotechnology, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Mahnaz Mohammadi Kian
- Hematology Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran.,Hematologic Malignancies Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Hassan Yousefi
- Department of Biochemistry and Molecular Biology, LSUHSC, School of Medicine, New Orleans, Louisiana, USA
| | - Marveh Rahmati
- Cancer Biology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Saeed Mohammadi
- Hematology Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran.,Hematologic Malignancies Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Ardeshir Ghavamzadeh
- Hematology Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Amin Moosavi
- Department of Molecular Medicine, Institute of Medical Biotechnology, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Mohsen Nikbakht
- Hematology Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran.,Hematologic Malignancies Research Center, Tehran University of Medical Sciences, Tehran, Iran
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83
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BAG3 Proteomic Signature under Proteostasis Stress. Cells 2020; 9:cells9112416. [PMID: 33158300 PMCID: PMC7694386 DOI: 10.3390/cells9112416] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 10/28/2020] [Accepted: 10/31/2020] [Indexed: 12/13/2022] Open
Abstract
The multifunctional HSP70 co-chaperone BAG3 (BCL-2-associated athanogene 3) represents a key player in the quality control of the cellular proteostasis network. In response to stress, BAG3 specifically targets aggregation-prone proteins to the perinuclear aggresome and promotes their degradation via BAG3-mediated selective macroautophagy. To adapt cellular homeostasis to stress, BAG3 modulates and functions in various cellular processes and signaling pathways. Noteworthy, dysfunction and deregulation of BAG3 and its pathway are pathophysiologically linked to myopathies, cancer, and neurodegenerative disorders. Here, we report a BAG3 proteomic signature under proteostasis stress. To elucidate the dynamic and multifunctional action of BAG3 in response to stress, we established BAG3 interactomes under basal and proteostasis stress conditions by employing affinity purification combined with quantitative mass spectrometry. In addition to the identification of novel potential BAG3 interactors, we defined proteins whose interaction with BAG3 was altered upon stress. By functional annotation and protein-protein interaction enrichment analysis of the identified potential BAG3 interactors, we confirmed the multifunctionality of BAG3 and highlighted its crucial role in diverse cellular signaling pathways and processes, ensuring cellular proteostasis and cell viability. These include protein folding and degradation, gene expression, cytoskeleton dynamics (including cell cycle and transport), as well as granulostasis, in particular.
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Abstract
PURPOSE Intestinal absorption in premature infants occurs via direct epithelial cellular endocytosis and degradation by intracellular lysosomes. Autophagy is a mechanism by which cytoplasmic organelles contribute to lysosomal degradation. However, excessive autophagy can lead to cell death. The purpose of this study was to investigate whether autophagy and endocytosis are present in the small intestinal mucosa during experimental necrotizing enterocolitis (NEC). METHODS NEC was induced by gavage feeding of hyperosmolar formula, lipopolysaccharide and hypoxia between P5 and P9 (ethical approval 44032). Breastfed mice were used as control. Distal ileum was harvested on P5, P7 and P9 and analyzed for intestinal epithelial cellular morphology as well as autophagy/lysosomal activity, and cell death. Groups were compared using Student's t test. RESULTS During NEC, giant lysosomes were present in the intestinal villi, with some exceeding their degradation ability leading to their rupture. The NEC group had significantly increased inflammation and autophagy activity, decreased lysosome activity, and increased apoptosis compared to control. CONCLUSIONS NEC induction causes excessive autophagy and endocytosis leading to lysosomal overloading, lysosomal membrane permeabilization and rupture which results in cell death. These novel findings may help to clarify the pathogenesis of NEC. Reduction of lysosome overload and assisting in their degradation capability may reduce the burden of NEC.
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85
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Wang L, Xu X, Liu T, Wang J, Shen J, Guo M, Wu Y, Zhai X, Zuo D. 1-(4-((5-chloro-4-((2-(isopropylsulfonyl)phenyl)amino)pyrimidin-2-yl)amino)-3-methoxyphenyl)-3-(2-(dimethylamino)ethyl)imidazolidin-2-one (ZX-42), a novel ALK inhibitor, induces apoptosis and protective autophagy in H2228 cells. J Pharm Pharmacol 2020; 72:1370-1382. [PMID: 32596809 DOI: 10.1111/jphp.13315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 05/23/2020] [Indexed: 12/18/2022]
Abstract
OBJECTIVES To examine the antiproliferative effects of 1-(4-((5-chloro-4-((2-(isopropylsulfonyl)phenyl)amino)pyrimidin-2-yl)amino)-3-methoxyphenyl)-3-(2-(dimethylamino)ethyl)imidazolidin-2-one (ZX-42) on the echinoderm microtubule-associated protein-4/anaplastic lymphoma kinase fusion gene (EML4-ALK) positive lung cancer cell line H2228 and its underlying mechanism. METHODS The MTT assay was used to study the effect of ZX-42 on H2228 cell growth. Propidium iodide (PI) staining and Western blotting were used to investigate the cell cycle changes. ZX-42-induced cell apoptosis was determined using the Annexin V-FITC/PI (AV/PI) apoptotic assay kit, acridine orange/ethidium bromide (AO/EB) and Hoechst 33258 staining, Rhodamine 123 (Rh 123) fluorescence assay and Western blotting. ZX-42-induced reactive oxygen species (ROS) production was examined by ROS assay kit. Transmission electron microscope, monodansylcadaverine (MDC) staining and the AV/PI apoptotic assay kit were used to demonstrate the relationship between autophagy and apoptosis. KEY FINDINGS ZX-42 had good cell viability inhibitory effect on H2228 cells. ZX-42 dramatically inhibited ALK and its downstream pathways. ZX-42 also blocked H2228 cell cycle at G1 phase and then induced apoptosis by activating the mitochondrial pathway. Next, ZX-42 induced the production of ROS, and antioxidant N-acetylcysteine (NAC) reduced ROS production and also decreased apoptotic rates. We also found that ZX-42 induced protective autophagy in H2228 cells. CONCLUSIONS In summary, ZX-42 is a novel ALK inhibitor that significantly inhibits the cell viability of H2228 cells and ultimately induces apoptosis through the mitochondrial pathway, in which autophagy plays a protective role. Therefore, inhibition of autophagy might enhance the anti-cancer effect of ZX-42.
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Affiliation(s)
- Lijing Wang
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang, China
| | - Xiaobo Xu
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang, China
| | - Tong Liu
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang, China
| | - Junfang Wang
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang, China
| | - Jiwei Shen
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang, China
| | - Ming Guo
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, China
| | - Yingliang Wu
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang, China
| | - Xin Zhai
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, China
| | - Daiying Zuo
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang, China
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86
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Zheng Q, Li Q, Zhao G, Zhang J, Yuan H, Gong D, Guo Y, Liu X, Li K, Lin P. Alkannin induces cytotoxic autophagy and apoptosis by promoting ROS-mediated mitochondrial dysfunction and activation of JNK pathway. Biochem Pharmacol 2020; 180:114167. [DOI: 10.1016/j.bcp.2020.114167] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/16/2020] [Accepted: 07/17/2020] [Indexed: 11/24/2022]
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87
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Lv GB, Wang TT, Zhu HL, Wang HK, Sun W, Zhao LF. Vortioxetine induces apoptosis and autophagy of gastric cancer AGS cells via the PI3K/AKT pathway. FEBS Open Bio 2020; 10:2157-2165. [PMID: 32750222 PMCID: PMC7530385 DOI: 10.1002/2211-5463.12944] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 05/24/2020] [Accepted: 06/05/2020] [Indexed: 12/24/2022] Open
Abstract
Vortioxetine is a potent antagonist of the 5‐hydroxytryptamine receptor and serotonin transporter and has been reported to function as an antidepressant in the treatment of major depressive disorder. However, its antitumor effects remain unclear. Here, we examined whether vortioxetine affects the characteristics of GC cells. Cell viability was measured by a colony formation assay and, in addition, cell invasion, migration and apoptosis assays were performed with a transwell assay and a flow cytometry assay. Protein levels were measured by western blotting. We found that vortioxetine inhibited the proliferation, invasion and migration abilities of AGS cells. Additionally, vortioxetine could induce apoptosis and autophagy by increasing the levels of Bax, active caspase‐3/‐9, Beclin‐1 and light chain 3, as well as by downregulating Bcl‐2 and P62. Further investigations indicated that vortioxetine regulated apoptosis and autophagy via activation of the phosphoinositide 3‐kinase/AKT pathway. Taken together, our data suggest that vortioxetine has cytotoxic effects against GC AGS cells as a result of inhibiting proliferation, invasion and migration, as well as by inducing apoptosis and autophagy through the phosphoinositide 3‐kinase/AKT pathway.
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Affiliation(s)
- Gao-Bo Lv
- Department of Anal-colorectal Surgery, Baoji Municipal Central Hospital, Baoji, China
| | - Ting-Ting Wang
- Department of Administration Center Outpatient, Baoji Municipal Central Hospital, Baoji, China
| | - Hai-Lin Zhu
- Department of Hepatobiliary Pancreatic Surgery, Baoji Municipal Central Hospital, Baoji, China
| | - Hong-Ke Wang
- Department of Gastroenterology, Baoji Municipal Central Hospital, Baoji, China
| | - Wen Sun
- Beijing Splinger Institute of Medicine, Jinan, China
| | - Li-Feng Zhao
- Department of Hepatobiliary Pancreatic Surgery, Baoji Municipal Central Hospital, Baoji, China
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88
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Wen X, Liu L, Li S, Lin P, Chen H, Zhou D, Tang K, Wang A, Jin Y. Prostaglandin F2α Induces Goat Corpus Luteum Regression via Endoplasmic Reticulum Stress and Autophagy. Front Physiol 2020; 11:868. [PMID: 33013430 PMCID: PMC7516216 DOI: 10.3389/fphys.2020.00868] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 06/29/2020] [Indexed: 12/11/2022] Open
Abstract
Corpus luteum (CL) is a transient endocrine tissue that produces progesterone for maintaining pregnancy in mammals. In addition, the regression of CL is necessary for the initiation of the estrous cycle. Extensive research has shown that the prostaglandin F2α (PGF2α) induces the regression of CL in ruminants. However, the mechanisms of endoplasmic reticulum (ER) stress and autophagy in the regression of goat CL induced by PGF2α are still unclear. In this study, ovaries of dioestrus goats and goats that were 3 months pregnant were collected to detect the location of the ER stress-related protein GRP78. The relationship between the different stages of the luteal phase of goat CL during the estrous cycle and changes in the expression of ER stress-related proteins and autophagy-related proteins was confirmed by western blot analysis. The results showed that both ER stress and autophagy were activated in the late luteal phase of the goat CL. To reveal the function of ER stress and autophagy in the CL regression process induced by PGF2α, we used 4-phenyl butyric acid (4-PBA) and chloroquine (CQ) for inhibiting ER stress and autophagy, respectively. Through the apoptotic rate detected by the flow cytometry and the expression of ER stress- and autophagy-related proteins detected by western blotting, we demonstrated that ER stress promoted goat luteal cell apoptosis and autophagy, and that apoptosis can be enhanced by the inhibition of autophagy. In addition, knockdown of EIF2S1, which blocked the PERK pathway activation, promoted apoptosis by reducing autophagy in goat luteal cells treated with PGF2α. In conclusion, our study indicates that ER stress promotes goat luteal cell apoptosis to regulate the regression of CL and activates autophagy to inhibit the goat luteal cell apoptosis via PERK signaling pathway.
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Affiliation(s)
- Xin Wen
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, China
| | - Lu Liu
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, China
| | - Shanshan Li
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, China
| | - Pengfei Lin
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, China
| | - Huatao Chen
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, China.,Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Shaanxi, China
| | - Dong Zhou
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, China.,Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Shaanxi, China
| | - Keqiong Tang
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, China.,Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Shaanxi, China
| | - Aihua Wang
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, China.,Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Shaanxi, China
| | - Yaping Jin
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, China.,Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Shaanxi, China
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89
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Zhang ML, Zhao GL, Hou Y, Zhong SM, Xu LJ, Li F, Niu WR, Yuan F, Yang XL, Wang Z, Miao Y. Rac1 conditional deletion attenuates retinal ganglion cell apoptosis by accelerating autophagic flux in a mouse model of chronic ocular hypertension. Cell Death Dis 2020; 11:734. [PMID: 32913260 PMCID: PMC7484783 DOI: 10.1038/s41419-020-02951-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 08/18/2020] [Accepted: 08/27/2020] [Indexed: 12/31/2022]
Abstract
Autophagy has a fundamental role in maintaining cell homeostasis. Although autophagy has been implicated in glaucomatous pathology, how it regulates retinal ganglion cell (RGC) injury is largely unknown. In the present work, we found that biphasic autophagy in RGCs occurred in a mouse model of chronic ocular hypertension (COH), accompanied by activation of Rac1, a member of the Rho family. Rac1 conditional knockout (Rac1 cKO) in RGCs attenuated RGC apoptosis, in addition to blocking the increase in the number of autophagosomes and the expression of autophagy-related proteins (Beclin1, LC3-II/I, and p62) in COH retinas. Electron micrograph and double immunostaining of LAMP1 and LC3B showed that Rac1 cKO accelerated autolysosome fusion in RGC axons of COH mice. Inhibiting the first autophagic peak with 3-methyladenine or Atg13 siRNA reduced RGC apoptosis, whereas inhibiting the second autophagic peak with 3-MA or blocking autophagic flux by chloroquine increased RGC apoptosis. Furthermore, Rac1 cKO reduced the number of autophagosomes and apoptotic RGCs induced by rapamycin injected intravitreally, which suggests that Rac1 negatively regulates mTOR activity. Moreover, Rac1 deletion decreased Bak expression and did not interfere with the interaction of Beclin1 and Bcl-2 or Bak in COH retinas. In conclusion, autophagy promotes RGC apoptosis in the early stages of glaucoma and results in autophagic cell death in later stages. Rac1 deletion alleviates RGC damage by regulating the cross talk between autophagy and apoptosis through mTOR/Beclin1-Bak. Interfering with the Rac1/mTOR signaling pathway may provide a new strategy for treating glaucoma.
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Affiliation(s)
- Meng-Lu Zhang
- Department of Ophthalmology, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Zhongshan Hospital, Fudan University, 200032, Shanghai, China
| | - Guo-Li Zhao
- Department of Ophthalmology, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Zhongshan Hospital, Fudan University, 200032, Shanghai, China
| | - Yu Hou
- Department of Ophthalmology, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Zhongshan Hospital, Fudan University, 200032, Shanghai, China
| | - Shu-Min Zhong
- Department of Ophthalmology, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Zhongshan Hospital, Fudan University, 200032, Shanghai, China
| | - Lin-Jie Xu
- Department of Ophthalmology, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Zhongshan Hospital, Fudan University, 200032, Shanghai, China
| | - Fang Li
- Department of Ophthalmology, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Zhongshan Hospital, Fudan University, 200032, Shanghai, China
| | - Wei-Ran Niu
- Department of Ophthalmology, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Zhongshan Hospital, Fudan University, 200032, Shanghai, China
| | - Fei Yuan
- Department of Ophthalmology, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Zhongshan Hospital, Fudan University, 200032, Shanghai, China
| | - Xiong-Li Yang
- Department of Ophthalmology, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Zhongshan Hospital, Fudan University, 200032, Shanghai, China
| | - Zhongfeng Wang
- Department of Ophthalmology, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Zhongshan Hospital, Fudan University, 200032, Shanghai, China.
| | - Yanying Miao
- Department of Ophthalmology, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Zhongshan Hospital, Fudan University, 200032, Shanghai, China.
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90
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Jin C, Zhong Y, Han J, Zhu J, Liu Q, Sun D, Xia X, Peng X. Drp1-mediated mitochondrial fission induced autophagy attenuates cell apoptosis caused by 3-chlorpropane-1,2-diol in HEK293 cells. Food Chem Toxicol 2020; 145:111740. [PMID: 32910998 DOI: 10.1016/j.fct.2020.111740] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/29/2020] [Accepted: 09/03/2020] [Indexed: 02/07/2023]
Abstract
3-chlorpropane-1,2-diol (3-MCPD) is a heat-induced food process contaminant that threatens human health. As the primary target organ, the morphological and functional impairment of kidney and the related mechanism such as apoptosis and mitochondrial dysfunction were observed. However, the precise molecular mechanism remains largely unclear. This study aimed to explore the important role of mitochondrial fission and autophagy in the 3-MCPD-caused apoptosis of human embryonic kidney 293 (HEK293) cells. The results showed that blockage of dynamin-related protein-1 (Drp1) by mitochondrial division inhibitor 1 (Mdivi-1, 15 μM) apparently restored 3-MCPD-induced mitochondrial dysfunction, accompanied by prevented the collapse of mitochondrial membrane potential and ATP depletion, and suppressed the occurrence of autophagy. Induction of autophagy occurred following 2.5-10 mM 3-MCPD treatment for 24 h via AMPK mediated mTOR signaling pathway. Meanwhile, enhancement of autophagy by pretreatment with rapamycin (1 nM) alleviated the loss of cell viability and apoptosis induced by 3-MCPD whereas suppression of autophagy by 3-methyladenine (1 mM) further accelerated apoptosis, which was modulated through the mitochondria-dependent apoptotic pathway. Taking together, this study provides novel insights into the 3-MCPD-induced apoptosis in HEK293 cells and reveals that autophagy has potential as an effective intervention strategy for the treatment of 3-MCPD-induced nephrotoxicity.
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Affiliation(s)
- Chengni Jin
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yujie Zhong
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Jiahui Han
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Jiachang Zhu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Qi Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Dianjun Sun
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Xiaodong Xia
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Xiaoli Peng
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China.
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91
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Lyu N, Zhang J, Dai Y, Xiang J, Li Y, Xu J. Calcitriol inhibits apoptosis via activation of autophagy in hyperosmotic stress stimulated corneal epithelial cells in vivo and in vitro. Exp Eye Res 2020; 200:108210. [PMID: 32896533 DOI: 10.1016/j.exer.2020.108210] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 08/23/2020] [Accepted: 08/30/2020] [Indexed: 02/09/2023]
Abstract
BACKGROUND Previously, calcitriol has been demonstrated as a potential therapeutic agent for dry eye, whilst its role on corneal epithelium death remains unclear. This study aims to investigate the relationship between apoptosis and autophagy on dry eye related scenario, as well as the effect of calcitriol and its potential mechanism. METHODS In vitro, immortalized human corneal epithelial cells (iHCEC) were cultured in hyperosmotic medium with or without various concentrations of calcitriol and other reagents. In vivo, Wistar rats were applied with benzalkonium chloride to induce dry eye. Then rats were topically treated with calcitriol (10-6 M) for 14 days. Autophagy flux (LC3B-II and SQSTM1/P62) was examined by western blotting or immunostaining. To test cell apoptosis, western blotting for cleaved caspase-3, Annexin V/PI double staining and TUNEL assay were used. CCK-8 assay was performed to detect the cell viability. Small interfering RNA was used to knock down the expression of vitamin D receptor in iHCECs. RESULTS Autophagy activation could protect iHCECs against HS induced apoptosis in vitro, and calcitriol was able to augment autophagy flux via VDR signaling, shown as the remarkably elevated expression of LC3B-II, as well as the declined p62 expression. In vivo results further supported the protective role of calcitriol on corneal epithelium apoptosis through promoting autophagy in dry eye rats. CONCLUSION The current study indicated that autophagy was an adaptive change of corneal epithelial cells in response to hyperosmotic stress and calcitriol could prevent cells from apoptosis via further activation of autophagy through VDR pathway.
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Affiliation(s)
- Ning Lyu
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai, China; NHC Key Laboratory of Myopia, Fudan University, Shanghai, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, China
| | - Jing Zhang
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai, China; NHC Key Laboratory of Myopia, Fudan University, Shanghai, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, China
| | - Yiqin Dai
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai, China; NHC Key Laboratory of Myopia, Fudan University, Shanghai, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, China
| | - Jun Xiang
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai, China; NHC Key Laboratory of Myopia, Fudan University, Shanghai, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, China
| | - Yue Li
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai, China; NHC Key Laboratory of Myopia, Fudan University, Shanghai, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, China
| | - Jianjiang Xu
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai, China; NHC Key Laboratory of Myopia, Fudan University, Shanghai, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, China.
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92
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Shang XY, Guo R, Yu XQ, Lin B, Huang XX, Yao GD, Song SJ. Enantiomeric 8-O-4'-type neolignans from Crataegus pinnatifida exhibit cytotoxic effect via apoptosis and autophagy in Hep3B cells. Bioorg Chem 2020; 104:104267. [PMID: 32920350 DOI: 10.1016/j.bioorg.2020.104267] [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: 07/31/2020] [Revised: 08/29/2020] [Accepted: 08/31/2020] [Indexed: 02/08/2023]
Abstract
Crataegus pinnatifida has been famous for its nutritional purpose. However, systematic investigation on the bioactive constituents is still lacking, although this fruit has been reported for its cytotoxic effect before. In this study, two pairs of new lignan enantiomers (1a/1b, 2a/2b), which isolated using chiral chromatographic column from the fruits of C. pinnatifida were studied. The absolute configurations of enantiomers were determined by comparison between the experimental electronic circular dichroism (ECD) and calculated ECD spectra. Among them, 1a/1b exhibited a better cytotoxic effect in hepatocellular carcinoma Hep3B cells with an IC50 value of 34.97 ± 2.74 and 17.42 ± 0.71 μM, respectively. In addition, 1b induced much more apoptotic, autophagic cells than 1a in Hep3B cells. Furthermore, the underlying mechanism was demonstrated that p38 activation could promote 1b-induced apoptosis and autophagy. Moreover, 1b-induced apoptosis was significantly decreased in the presence of autophagic inhibitor Bafilomycin A1 (Baf A1), suggesting that the induction of autophagy enhanced apoptotic cell death in 1b-treated cells. In general, these findings provide a valuable basis for further understanding the effect of 8-O-4' lignans in C. pinnatifida on cytotoxic effect.
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Affiliation(s)
- Xin-Yue Shang
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Rui Guo
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Xiao-Qi Yu
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Bin Lin
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, People's Republic of China
| | - Xiao-Xiao Huang
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China.
| | - Guo-Dong Yao
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China.
| | - Shao-Jiang Song
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China.
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93
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Hu SQ, Zhang QC, Meng QB, Hu AN, Zou JP, Li XL. Autophagy regulates exosome secretion in rat nucleus pulposus cells via the RhoC/ROCK2 pathway. Exp Cell Res 2020; 395:112239. [PMID: 32828826 DOI: 10.1016/j.yexcr.2020.112239] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 08/14/2020] [Accepted: 08/17/2020] [Indexed: 12/13/2022]
Abstract
Our present study investigated whether exosome secretion of nucleus pulposus cells (NPCs) is regulated by autophagy. Different autophagic states of NPCs were induced by rapamycin (Rap), bafilomycin A1 (Baf) and other agents, and it was found that exosomes were secreted in an autophagy-dependent manner. Activation or inhibition of autophagy increased or decreased, respectively, the amount of exosomes that were released into the extracellular space. In addition, in order to confirm that Rap-promoted release of exosomes was mediated by autophagy rather than other pathways, we used autophagy associated gene 5 (ATG5) small-interfering RNA (siRNA) to silence the expression of ATG5 gene, which is indispensable for autophagy. The results showed that siRNA against ATG5 (siATG5) induced an accumulation of intraluminal vesicles (ILVs) in NPCs and a concomitant decrease in the amount of exosomes isolated from supernatant. Ras homolog gene (Rho) and Rho-associated coiled-coil forming protein kinase (ROCK) family molecules are capable of cytoskeletal remodeling and affecting vesicle transport. Therefore, we carried out targeted interventions and evaluated the effects of the RhoC/ROCK2 pathway on the secretion of exosomes within autophagic environment. Knockdown of RhoC and ROCK2 with corresponding siRNA significantly inhibited the secretion of exosomes originating from ILVs in NPCs, even when NPCs were subsequently treated with Rap. Taken together, our findings suggest that autophagy positively regulates expression levels of RhoC and ROCK2, and that the RhoC/ROCK2 pathway exerts a key function on NPCs-derived exosome secretion.
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Affiliation(s)
- Shun-Qi Hu
- Department of Orthopedics, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Qi-Chen Zhang
- Department of Orthopedics, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Qing-Bing Meng
- Department of Orthopedics, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - An-Nan Hu
- Department of Orthopedics, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Jia-Peng Zou
- Department of Orthopedics, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Xi-Lei Li
- Department of Orthopedics, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
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94
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Liao Z, Zhang X, Song C, Lin W, Cheng Y, Xie Z, Chen S, Nie Y, Li A, Zhang H, Li H, Li H, Xie Q. ALV-J inhibits autophagy through the GADD45β/MEKK4/P38MAPK signaling pathway and mediates apoptosis following autophagy. Cell Death Dis 2020; 11:684. [PMID: 32826872 PMCID: PMC7442830 DOI: 10.1038/s41419-020-02841-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 07/29/2020] [Accepted: 07/29/2020] [Indexed: 02/06/2023]
Abstract
Autophagy and apoptosis, which are important processes for host immunity, are commonly exploited by viruses to facilitate their survival. However, to the best of our knowledge, very few studies have researched the mechanisms of action of the autophagic and apoptotic signaling pathways following viral infection. Thus, the present study aimed to investigate the mechanisms of action of growth arrest and DNA-damage-inducible β (GADD45β), an important resistance gene involved in the host resistance to ALV-J. Both ALV-J infection and the overexpression of GADD45β inhibited autophagy during the early stages, which prevented the autophagosomes from binding to the lysosomes and resulted in an incomplete autophagic flux. Notably, GADD45β was discovered to interact with MEKK4 in DF-1 cells. The genetic knockdown of GADD45β and MEKK4 using small interfering RNA-affected ALV-J infection, which suggested that ALV-J may promote the binding of GADD45β to MEKK4 to activate the p38MAPK signaling pathway, which subsequently inhibits autophagy. Furthermore, ALV-J was revealed to affect the autophagic pathway prior to affecting the apoptotic pathway. In conclusion, to the best of our knowledge, the present study was the first to investigate the combined effects of ALV-J infection on autophagy and apoptosis, and to suggest that ALV-J inhibits autophagy via the GADD45β/MEKK4/p38MAPK signaling pathway.
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Affiliation(s)
- Zhihong Liao
- Lingnan Guangdong Laboratory of Modern Agriculture & Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, 510642, Guangzhou, PR China.,Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangdong, 510642, Guangzhou, PR China
| | - Xinheng Zhang
- Lingnan Guangdong Laboratory of Modern Agriculture & Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, 510642, Guangzhou, PR China.,Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangdong, 510642, Guangzhou, PR China.,South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, 510642, Guangzhou, PR China.,Guangdong Engineering Research Center for Vector Vaccine of Animal Virus, 510642, Guangzhou, PR China
| | - Cailiang Song
- Lingnan Guangdong Laboratory of Modern Agriculture & Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, 510642, Guangzhou, PR China.,Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangdong, 510642, Guangzhou, PR China.,Guangdong Engineering Research Center for Vector Vaccine of Animal Virus, 510642, Guangzhou, PR China
| | - Wencheng Lin
- Lingnan Guangdong Laboratory of Modern Agriculture & Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, 510642, Guangzhou, PR China.,Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangdong, 510642, Guangzhou, PR China.,South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, 510642, Guangzhou, PR China.,Guangdong Engineering Research Center for Vector Vaccine of Animal Virus, 510642, Guangzhou, PR China
| | - Yuzhen Cheng
- Lingnan Guangdong Laboratory of Modern Agriculture & Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, 510642, Guangzhou, PR China
| | - Zi Xie
- Lingnan Guangdong Laboratory of Modern Agriculture & Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, 510642, Guangzhou, PR China.,Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangdong, 510642, Guangzhou, PR China.,Guangdong Engineering Research Center for Vector Vaccine of Animal Virus, 510642, Guangzhou, PR China
| | - Sheng Chen
- Lingnan Guangdong Laboratory of Modern Agriculture & Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, 510642, Guangzhou, PR China.,Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangdong, 510642, Guangzhou, PR China
| | - Yu Nie
- Lingnan Guangdong Laboratory of Modern Agriculture & Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, 510642, Guangzhou, PR China.,Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangdong, 510642, Guangzhou, PR China
| | - Aijun Li
- College of Science and Engineering, Jinan University, 510632, Guangzhou, PR China
| | - Huanmin Zhang
- USDA, Agriculture Research Service, Avian Disease and Oncology Laboratory, East Lansing, MI, 48823, USA
| | - Hongxin Li
- Lingnan Guangdong Laboratory of Modern Agriculture & Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, 510642, Guangzhou, PR China.,Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangdong, 510642, Guangzhou, PR China.,South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, 510642, Guangzhou, PR China.,Guangdong Engineering Research Center for Vector Vaccine of Animal Virus, 510642, Guangzhou, PR China
| | - Haiyun Li
- Lingnan Guangdong Laboratory of Modern Agriculture & Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, 510642, Guangzhou, PR China
| | - Qingmei Xie
- Lingnan Guangdong Laboratory of Modern Agriculture & Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, 510642, Guangzhou, PR China. .,Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangdong, 510642, Guangzhou, PR China. .,South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, 510642, Guangzhou, PR China. .,Guangdong Engineering Research Center for Vector Vaccine of Animal Virus, 510642, Guangzhou, PR China.
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95
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The Role of Autophagy and NLRP3 Inflammasome in Liver Fibrosis. BIOMED RESEARCH INTERNATIONAL 2020; 2020:7269150. [PMID: 32733951 PMCID: PMC7369671 DOI: 10.1155/2020/7269150] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 06/29/2020] [Indexed: 02/07/2023]
Abstract
Liver fibrosis is an intrinsic repair process of chronic injury with excessive deposition of extracellular matrix. As an early stage of various liver diseases, liver fibrosis is a reversible pathological process. Therefore, if not being controlled in time, liver fibrosis will evolve into cirrhosis, liver failure, and liver cancer. It has been demonstrated that hepatic stellate cells (HSCs) play a crucial role in the formation of liver fibrosis. In particular, the activation of HSCs is a key step for liver fibrosis. Recent researches have suggested that autophagy and inflammasome have biological effect on HSC activation. Herein, we review current studies about the impact of autophagy and NOD-like receptors containing pyrin domain 3 (NLRP3) inflammasome on liver fibrosis and the underlying mechanisms.
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96
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Alimohammadi M, Golpour M, Sohbatzadeh F, Hadavi S, Bekeschus S, Niaki HA, Valadan R, Rafiei A. Cold Atmospheric Plasma Is a Potent Tool to Improve Chemotherapy in Melanoma In Vitro and In Vivo. Biomolecules 2020; 10:biom10071011. [PMID: 32650505 PMCID: PMC7407977 DOI: 10.3390/biom10071011] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 06/10/2020] [Accepted: 06/22/2020] [Indexed: 12/16/2022] Open
Abstract
Malignant melanoma is a devastating disease. Because of its aggressiveness, it also serves as a model tumor for investigating novel therapeutic avenues. In recent years, scientific evidence has shown that cold atmospheric plasma (CAP) might be a promising modality in cancer therapy. In this study, we aimed to evaluate the effect of CAP generated by an argon plasma jet alone or in combination with dacarbazine (DAC) on melanoma cells in vitro and in vivo. The effects of the CAP on inducing lipid peroxidation and nitric oxide production were higher in B16 melanoma cells in comparison to non-malignant L929 cells. Assays on cell growth, apoptosis, and expression of genes related to, e.g., autophagic processes, showed CAP to have a substantial impact in melanoma cells while there were only minoreffects in L929 cells. In vivo, both CAP monotherapy and combination with DAC significantly decreased tumor growth. These results suggest that CAP not only selectively induces cell death in melanoma but also holds promises in combination with chemotherapy that might lead to improved tumor control.
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Affiliation(s)
- Mina Alimohammadi
- Department of Immunology, Molecular and Cell Biology Research Center, School of Medicine, Mazandaran University of Medical Sciences, Sari 4847191971, Iran; (M.A.); (R.V.)
| | - Monireh Golpour
- Molecular and Cell Biology Research Center, Student Research Committee, Faculty of Medicine, Mazandaran University of Medical Science, Sari 4847191971, Iran;
| | - Farshad Sohbatzadeh
- Department of Atomic and Molecular Physics, Faculty of Basic Sciences, University of Mazandaran, Babolsar 4741613534, Iran; (F.S.); (S.H.)
| | - Seyedehniaz Hadavi
- Department of Atomic and Molecular Physics, Faculty of Basic Sciences, University of Mazandaran, Babolsar 4741613534, Iran; (F.S.); (S.H.)
| | - Sander Bekeschus
- ZIK Plasmatis, Leibniz Institute for Plasma Science and Technology (INP), 17489 Greifswald, Germany;
| | - Haleh Akhavan Niaki
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol 4817813748, Iran;
| | - Reza Valadan
- Department of Immunology, Molecular and Cell Biology Research Center, School of Medicine, Mazandaran University of Medical Sciences, Sari 4847191971, Iran; (M.A.); (R.V.)
| | - Alireza Rafiei
- Department of Immunology, Molecular and Cell Biology Research Center, School of Medicine, Mazandaran University of Medical Sciences, Sari 4847191971, Iran; (M.A.); (R.V.)
- Correspondence: ; Tel.: +98-11-3354-3614
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97
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Li CF, Pan YK, Gao Y, Shi F, Wang YC, Sun XQ. Autophagy protects HUVECs against ER stress-mediated apoptosis under simulated microgravity. Apoptosis 2020; 24:812-825. [PMID: 31359205 PMCID: PMC6711952 DOI: 10.1007/s10495-019-01560-w] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Astronauts exposed to a gravity-free environment experience cardiovascular deconditioning that causes post-spaceflight orthostatic intolerance and other pathological conditions. Endothelial dysfunction is an important factor responsible for this alteration. Our previous study showed enhanced autophagy in endothelial cells under simulated microgravity. The present study explored the cytoprotective role of autophagy under microgravity in human umbilical vein endothelial cells (HUVECs). We found that clinorotation for 48 h induced apoptosis and endoplasmic reticulum (ER) stress in HUVECs. ER stress and the unfolded protein response (UPR) partially contributed to apoptosis under clinorotation. Autophagy partially reduced ER stress and restored UPR signaling by autophagic clearance of ubiquitin-protein aggregates, thereby reducing apoptosis. In addition, the ER stress antagonist 4-phenylbutyric acid upregulated autophagy in HUVECs. Taken together, these findings indicate that autophagy plays a protective role against apoptosis under clinorotation by clearing protein aggregates and partially restoring the UPR.
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Affiliation(s)
- Cheng-Fei Li
- Department of Aerospace Biodynamics, School of Aerospace Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, 710032, China
| | - Yi-Kai Pan
- Department of Aerospace Biodynamics, School of Aerospace Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, 710032, China
| | - Yuan Gao
- Department of Aerospace Biodynamics, School of Aerospace Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, 710032, China
| | - Fei Shi
- Department of Aerospace Biodynamics, School of Aerospace Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, 710032, China
| | - Yong-Chun Wang
- Key Lab of Aerospace Medicine, Chinese Ministry of Education, Xi'an, 710032, Shaanxi, China.
| | - Xi-Qing Sun
- Department of Aerospace Biodynamics, School of Aerospace Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, 710032, China.
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98
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Glycosylation end products mediate damage and apoptosis of periodontal ligament stem cells induced by the JNK-mitochondrial pathway. Aging (Albany NY) 2020; 12:12850-12868. [PMID: 32611833 PMCID: PMC7377852 DOI: 10.18632/aging.103304] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 03/30/2020] [Indexed: 12/11/2022]
Abstract
Background: Recent studies have confirmed the bidirectional relationship between the two and the exacerbation of periodontitis by type II diabetes mellitus (T2DM), the pathogenic mechanism has not yet been clarified, AGEs has been linked to the pathogenesis of both periodontitis and T2DM, JNK signaling pathway might play a important role to explain the inner mechanism. Objectives: To study advanced glycation end products (AGEs) activate the innate immune system of the host by activating oxidative stress and affecting cellular signal transduction in periodontal ligament stem cells (PDLSCs); Results: TNF-α and/or AGEs can induce the formation of endogenous ROS in PDLSCs, thereby activating the downstream JNK signalling pathway, leading to the initiation of the mitochondria-mediated apoptotic pathway and the induction of PDLSC apoptosis. Conclusion: we hypothesized that the JNK pathway is a key link in the apoptosis of PDLSCs mediated by TNF-α and/or AGEs. Materials and Methods: PDLSCs from healthy volunteers were extracted, cultured and stimulated with TNF-a and/or AGEs, Flow cytometry, CCK-8, multidifferential assay, RT-PCR, apoptosis assay, Transmission electron microscopy and Western blotting were recruit to detect the internal relations between AGEs and PDLSCs.
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99
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Jung J, Park DC, Kim YI, Lee EH, Park MJ, Kim SH, Yeo SG. Decreased expression of autophagy markers in culture-positive patients with chronic otitis media. J Int Med Res 2020; 48:300060520936174. [PMID: 32589484 PMCID: PMC7323285 DOI: 10.1177/0300060520936174] [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: 11/17/2022] Open
Abstract
Objective Abnormal autophagy plays a role in the pathogenesis of various diseases. This study aimed to evaluate associations between the clinical manifestations of chronic otitis media (COM) and expression of autophagy markers. Methods Associations between presence of bacteria, otorrhea, and conductive and sensorineural hearing loss and levels of autophagy-related mRNAs were investigated in 47 patients with COM. Results Autophagy-related mRNAs were detected in all inflammatory tissues of COM patients. LC3-II showed the highest level of expression, followed by Beclin-1, P13KC3, Rubicon, and mTOR. Beclin-1 mRNA levels were significantly lower in culture-positive than in culture-negative patients. Conclusion Autophagy is involved in the pathogenesis of COM. The finding that expression of autophagy markers, especially Beclin-1, was lower in culture-positive than in culture-negative patients suggested that these markers are closely associated with the clinical features of COM.
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Affiliation(s)
- Junyang Jung
- Department of Anatomy and Neurobiology, College of Medicine, Kyung Hee University, Seoul, Korea
| | - Dong Choon Park
- St. Vincent's Hospital, The Catholic University of Korea, Suwon, Korea
| | - Young Il Kim
- Medical Science Research Institute, Kyung Hee University Medical Center, Seoul, Republic of Korea
| | - Eun Hye Lee
- Department of Pediatrics, College of Medicine, Kyung Hee University, Seoul, Korea
| | - Myung Jin Park
- Department of Otorhinolaryngology and Head and Neck Surgery, College of Medicine, Kyung Hee University, Seoul, Korea
| | - Sang Hoon Kim
- Department of Otorhinolaryngology and Head and Neck Surgery, College of Medicine, Kyung Hee University, Seoul, Korea
| | - Seung Geun Yeo
- Medical Science Research Institute, Kyung Hee University Medical Center, Seoul, Republic of Korea.,Department of Otorhinolaryngology and Head and Neck Surgery, College of Medicine, Kyung Hee University, Seoul, Korea
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100
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Wang X, Shao QH, Zhou H, Wu JL, Quan WQ, Ji P, Yao YW, Li D, Sun ZJ. Ginkgolide B inhibits lung cancer cells promotion via beclin-1-dependent autophagy. BMC Complement Med Ther 2020; 20:194. [PMID: 32576183 PMCID: PMC7310550 DOI: 10.1186/s12906-020-02980-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 06/01/2020] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Ginkgolide B (GKB) is a major active component of the extracts of Ginkgo biloba leaves, and it has been used as an anti-cancer agent. However, it is unknown whether GKB has the therapeutic effects on lung cancer. Here, we studied the effects of GKB on lung cancer cells. METHODS The effects of GKB on lung cancer cell proliferation and invasion were analyzed by cell counting kit (CCK-8) and cell invasion assays, respectively. Apoptosis was detected by flow cytometry. Western blot analysis was used to confirm the expression of autophagy-associated proteins in GKB-treated cells. Immunofluorescence analysis was used to analyze the level of light chain 3B (LC3B). RESULTS Treatment with GKB time-dependently inhibited the proliferation and decreased the invasive capacity of A549 and H1975 cells. GKB induced apoptosis of these cells, but there was no significant effect on apoptosis compared to the control treatment. GKB-induced inhibition of cell proliferation and GKB-induced cell death were due to autophagy rather than apoptosis. GKB-induced autophagy of lung cancer cells was dependent on beclin-1, and autophagy-induced inhibition of the NLRP3 inflammasome contributed to the anti-tumor effect of GKB. CONCLUSIONS GKB-mediated autophagy of lung cancer cells is beclin-1-dependent and results in inhibition of the NLRP3 inflammasome. Therefore, GKB might be a potential therapeutic candidate for the treatment of lung cancer.
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Affiliation(s)
- Xuan Wang
- Department of Pharmacy, Putuo People’s Hospital, Shanghai, 200060 China
| | - Qi-Hui Shao
- grid.24516.340000000123704535Department of Traditional Chinese Medicine, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065 China
| | - Hao Zhou
- Department of Pharmacy, Putuo People’s Hospital, Shanghai, 200060 China
| | - Jun-Lu Wu
- grid.24516.340000000123704535Department of Clinical Laboratory, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065 China
| | - Wen-Qiang Quan
- grid.24516.340000000123704535Department of Clinical Laboratory, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065 China
| | - Ping Ji
- grid.24516.340000000123704535Department of Clinical Laboratory, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065 China
| | - Yi-Wen Yao
- grid.24516.340000000123704535Department of Clinical Laboratory, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065 China
| | - Dong Li
- grid.24516.340000000123704535Department of Clinical Laboratory, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065 China
| | - Zu-Jun Sun
- grid.24516.340000000123704535Department of Clinical Laboratory, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065 China
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