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Han S, Liu P, Yan Q, Cen Y, Wu G, Chen Z, Li M, Deng Y, Luo F, Lin J. Seawater pearl hydrolysate inhibits photoaging via decreasing oxidative stress, autophagy and apoptosis of Ultraviolet B-induced human skin keratinocytes. J Cosmet Dermatol 2024; 23:256-270. [PMID: 37435953 DOI: 10.1111/jocd.15916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 05/30/2023] [Accepted: 06/25/2023] [Indexed: 07/13/2023]
Abstract
BACKGROUND Ultraviolet (UV) is the main reason to cause photoaging skin which not only hinders beauty, brings the patients with psychological burden, but also pathologically leads to the occurrence of tumors in skin. OBJECTIVE This study goes into the inhibitory effect and mechanism of seawater pearl hydrolysate (SPH) to address human skin keratinocytes photoaging induced by UVB. METHODS The photoaging model of Hacat cell was constructed by UVB irradiation, the levels of oxidative stress, apoptosis, aging, autophagy and autophagy-related protein and signal pathway expression were assessed to characterize the inhibitory effect and mechanism of SPH on photoaging Hacat cell. RESULTS Seawater pearl hydrolysate significantly accelerated (p < 0.05) the activities of superoxide dismutase, catalase, and glutathione peroxidase, and markedly reduced (p < 0.05) the contents of reactive oxygen species (ROS), malondialdehyde, protein carbonyl compound and nitrosylated tyrosine protein, aging level, apoptosis rate in Hacat cell induced by 200 mJ cm-2 UVB after 24 and 48 h of culture; high dose SPH significantly raised (p < 0.05) relative expression level of p-Akt, p-mTOR proteins, and markedly decreased (p < 0.05) relative expression level of LC3II protein, p-AMPK, and autophagy level in Hacat cell induced by 200 mJ cm-2 UVB, or in combination with the intervention of PI3K inhibitor or AMPK overexpression after 48 h of culture. CONCLUSION Seawater pearl hydrolysate can effectively inhibit 200 mJ cm-2 UVB-induced photoaging of Hacat cells. The mechanism indicates removing the excessive ROS through increasing the antioxidation of photoaging Hacat cells. Once redundant ROS is eliminated, SPH works to reduce AMPK, increase PI3K-Akt pathway expression, activate mTOR pathway to lowdown autophagy level, and as a result, inhibit apoptosis and aging in photoaging Hacat cells.
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Affiliation(s)
- Siyin Han
- School of Basic Medical Science, Guangxi University of Chinese Medicine, Nanning, China
| | - Peng Liu
- School of Basic Medical Science, Guangxi University of Chinese Medicine, Nanning, China
| | - Qiangqiang Yan
- School of Basic Medical Science, Guangxi University of Chinese Medicine, Nanning, China
| | - Yanhui Cen
- School of Basic Medical Science, Guangxi University of Chinese Medicine, Nanning, China
| | - Guanyi Wu
- School of Basic Medical Science, Guangxi University of Chinese Medicine, Nanning, China
| | - Zhenxing Chen
- School of Basic Medical Science, Guangxi University of Chinese Medicine, Nanning, China
| | - Mingxing Li
- School of Basic Medical Science, Guangxi University of Chinese Medicine, Nanning, China
| | - Yasheng Deng
- School of Basic Medical Science, Guangxi University of Chinese Medicine, Nanning, China
| | - Fei Luo
- School of Basic Medical Science, Guangxi University of Chinese Medicine, Nanning, China
| | - Jiang Lin
- School of Basic Medical Science, Guangxi University of Chinese Medicine, Nanning, China
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Zhang D, Liu W, Peng L, Wang H, Lin M, Li Y, Wang Z. Difference in oral microbial composition between chronic periodontitis patients with and without diabetic nephropathy. BMC Oral Health 2022; 22:12. [PMID: 35034610 PMCID: PMC8762855 DOI: 10.1186/s12903-021-01985-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 11/23/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To investigate the difference in the structural composition of salivary flora between chronic periodontitis patients with and without diabetic nephropathy (DN). METHODS Thirty salivary samples of 15 chronic periodontitis patients with DN (DN group) and 15 chronic periodontitis patients with diabetes but without DN (DM group) were subjected to pyrosequencing of polymerase chain reaction-amplified 16 s ribosomal RNA genes. After diversity testing, the differential flora were analyzed. The sequencing results were compared with GenBank database to determine the type of differential flora using species composition analysis, hierarchical cluster analysis, principal co-ordinate analysis, and species difference analysis. RESULTS There were significant between-group differences with respect to Gemella, Selenomonas spp, Lactobacillales_unclassified, Bacteria-unclassified and Abiotrophia (p < 0.05). Compared with DM group, the relative abundance of Selenomonas spp. in DN group was significantly higher; the area under the receiver operating characteristic curve of Selenomonas spp. was 0.713 (P < 0.05). Multi-level biological identification and feature maps indicated that Selenomonas spp. might be used as a potential biomarker for DN patients. On binary logistic regression analysis, increase of Selenomonas spp. was related with DN. CONCLUSIONS We found significant between-group differences in the structural composition of oral flora. The increase in the relative abundance of Selenomonas spp. may be associated with DN in patients with chronic periodontitis.
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Affiliation(s)
- Dongxue Zhang
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, No. 8 South Gongti Road, Chao Yang District, Beijing, 100020, China
| | - Wenyan Liu
- Department of Stomatology, Beijing Luhe Hospital, Capital Medical University, Beijing, 101149, China
| | - Li Peng
- Department of Stomatology, The Third People's Hospital of Datong City, Datong, 037008, China
| | - Haiyan Wang
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, No. 8 South Gongti Road, Chao Yang District, Beijing, 100020, China
| | - Mei Lin
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, No. 8 South Gongti Road, Chao Yang District, Beijing, 100020, China
| | - Yufeng Li
- Department of Endocrinology, Beijing Friendship Hospital Pinggu Campus, Capital Medical University, No.59 Xinping North Road, Pinggu District, Beijing, 101200, China.
| | - Zuomin Wang
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, No. 8 South Gongti Road, Chao Yang District, Beijing, 100020, China.
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Mei Y, Shen X, Wang X, Zhang M, Li Q, Yan J, Xu J, Xu Y. Expression of autophagy and apoptosis-related factors in the periodontal tissue of experimental diabetic rats: a histomorphometric, microtomographic and immunohistochemical study. PeerJ 2021; 9:e11577. [PMID: 34178461 PMCID: PMC8197035 DOI: 10.7717/peerj.11577] [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: 11/12/2020] [Accepted: 05/18/2021] [Indexed: 11/25/2022] Open
Abstract
Objective This study aimed to investigate the expression of autophagy-related factors microtubule-associated protein l light chain 3 (LC3) and the apoptosis-related factors BCL2-associated X protein (Bax) and B cell lymphoma-2 (Bcl-2) in the periodontal tissue of experimental diabetic rats. These data were used to explore the potential mechanism in diabetes-induced periodontal tissue lesions. Methods A total of 32 Sprague Dawley (SD) rats were randomly assigned into diabetes (group D, n = 16) and control groups (group N, n = 16). The diabetic group was induced by intraperitoneal injection of 1% streptozotocin (STZ, 60 mg/kg) and the control group was injected with citrate buffer (0.1mol/L). Rats were sacrificed after 4 and 8 weeks of feeding and collected as D1, N1 groups and D2, N2 groups, and the maxilla were retained for analysis. The changes in periodontal tissue structure were observed by hematoxylin-eosin (HE) staining. The expression and distribution of LC3, Bax and Bcl-2 in the periodontium of the rats was detected by immunohistochemical (SP) staining. Results Diabetic rats showed several changes compared to control animals including sparse alveolar bone trabecular structure, loss of the lamina dura and absorption of the local alveolar bone. The positive expression level of LC3 in the gingival epithelial, periodontal ligament and alveolar bone of group D1 was significantly higher than in the N1, N2 and D2 groups (P < 0.05). The level of Bax expression in the group D2 rats was significantly higher than those in the N1, N2 and D1 groups (P < 0.05), while the positive degree of Bcl-2 was significantly lower than those of other groups (P < 0.001). LC3 was negatively correlated with Bax and was irrelevant with Bcl-2; Bcl-2 was not correlated with Bax. Conclusions The expression of LC3, Bax and Bcl-2 changes in the periodontal tissue of diabetic rats may indicate that autophagy and apoptotic are involved in the process of periodontal tissue damage in diabetic rats. These changes may be one of the mechanisms of periodontal tissue lesions.
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Affiliation(s)
- Youmin Mei
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontology, Nantong Stomatological Hospital, The Affiliated Nantong Stomatological Hospital of Nantong University, Nantong, China
| | - Xiang Shen
- Department of Stomatology, The Affiliated Hospital of Nantong University, Nantong, China
| | - Xiaoqian Wang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Min Zhang
- Department of Periodontology, Nantong Stomatological Hospital, The Affiliated Nantong Stomatological Hospital of Nantong University, Nantong, China
| | - Qiao Li
- Department of Periodontology, Nantong Stomatological Hospital, The Affiliated Nantong Stomatological Hospital of Nantong University, Nantong, China
| | - Junyi Yan
- Department of Periodontology, Nantong Stomatological Hospital, The Affiliated Nantong Stomatological Hospital of Nantong University, Nantong, China
| | - Jiali Xu
- Department of Periodontology, Nantong Stomatological Hospital, The Affiliated Nantong Stomatological Hospital of Nantong University, Nantong, China
| | - Yan Xu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
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Yang CM, Lin CC, Yang CC, Cho RL, Hsiao LD. Mevastatin-Induced AP-1-Dependent HO-1 Expression Suppresses Vascular Cell Adhesion Molecule-1 Expression and Monocyte Adhesion on Human Pulmonary Alveolar Epithelial Cells Challenged with TNF-α. Biomolecules 2020; 10:biom10030381. [PMID: 32121588 PMCID: PMC7175369 DOI: 10.3390/biom10030381] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/12/2020] [Accepted: 02/27/2020] [Indexed: 12/18/2022] Open
Abstract
Mevastatin (MVS) has been previously shown to induce heme oxygenase (HO)-1 expression through Nox/ROS-dependent PDGFRα/PI3K/Akt/Nrf2/ARE axis in human pulmonary alveolar epithelial cells (HPAEpiCs). However, alternative signaling pathways might involve in MVS-induced HO-1 expression. We found that tumor necrosis factor α (TNFα) induced vascular cell adhesion protein 1 (VCAM-1) expression and NF-κB p65 phosphorylation which were attenuated by pretreatment with MVS via up-regulation of HO-1, determined by Western blot and real-time qPCR. TNFα-induced VCAM-1 expression was attenuated by an NF-κB inhibitor, Bay117082. The inhibitory effects of MVS were reversed by tin protoporphyrin (SnPP)IX (an inhibitor of HO-1 activity). In addition, pretreatment with the inhibitor of pan-Protein kinase C (PKC) (GF109203X), PKCα (Gö6983), Pyk2 (PF431396), p38α MAPK (SB202190), JNK1/2 (SP600125), or AP-1 (Tanshinone IIA), and transfection with their respective siRNAs abolished MVS-induced HO-1 expression in HPAEpiCs. c-Jun (one of AP-1 subunits) was activated by PKCα, Pyk2, p38α MAPK, and JNK1/2, which turned on the transcription of the homx1 gene. The interaction between c-Jun and HO-1 promoter was confirmed by a chromatin immunoprecipitation (ChIP) assay, which was attenuated by these pharmacological inhibitors. These results suggested that MVS induces AP-1/HO-1 expression via PKCα/Pyk2/p38α MAPK- or JNK1/2-dependent c-Jun activation, which further binds with AP-1-binding site on HO-1 promoter and suppresses the TNFα-mediated inflammatory responses in HPAEpiCs. Thus, upregulation of the AP-1/HO-1 system by MVS exerts a potentially therapeutic strategy to protect against pulmonary inflammation.
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Affiliation(s)
- Chuen-Mao Yang
- Department of Pharmacology, College of Medicine, China Medical University, Taichung 40402, Taiwan; (R.-L.C.); (L.-D.H.)
- Department of Post-Baccalaureate Veterinary Medicine, College of Medical and Health Science, Asia University, Wufeng, Taichung 41354, Taiwan
- Correspondence: ; Tel.: +886-4-22053366 (ext. 2229)
| | - Chih-Chung Lin
- Department of Anesthetics, Chang Gung Memorial Hospital at Linkuo, Kwei-San, Tao-Yuan 33302, Taiwan;
| | - Chien-Chung Yang
- Department of Traditional Chinese Medicine, Chang Gung Memorial Hospital at Tao-Yuan, Kwei-San, Tao-Yuan 33302, Taiwan;
- School of Traditional Chinese Medicine, College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan 33302, Taiwan
| | - Rou-Ling Cho
- Department of Pharmacology, College of Medicine, China Medical University, Taichung 40402, Taiwan; (R.-L.C.); (L.-D.H.)
| | - Li-Der Hsiao
- Department of Pharmacology, College of Medicine, China Medical University, Taichung 40402, Taiwan; (R.-L.C.); (L.-D.H.)
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Molecular Interactions Between Reactive Oxygen Species and Autophagy in Kidney Disease. Int J Mol Sci 2019; 20:ijms20153791. [PMID: 31382550 PMCID: PMC6696055 DOI: 10.3390/ijms20153791] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 07/30/2019] [Accepted: 07/31/2019] [Indexed: 12/11/2022] Open
Abstract
Reactive oxygen species (ROS) are highly reactive signaling molecules that maintain redox homeostasis in mammalian cells. Dysregulation of redox homeostasis under pathological conditions results in excessive generation of ROS, culminating in oxidative stress and the associated oxidative damage of cellular components. ROS and oxidative stress play a vital role in the pathogenesis of acute kidney injury and chronic kidney disease, and it is well documented that increased oxidative stress in patients enhances the progression of renal diseases. Oxidative stress activates autophagy, which facilitates cellular adaptation and diminishes oxidative damage by degrading and recycling intracellular oxidized and damaged macromolecules and dysfunctional organelles. In this review, we report the current understanding of the molecular regulation of autophagy in response to oxidative stress in general and in the pathogenesis of kidney diseases. We summarize how the molecular interactions between ROS and autophagy involve ROS-mediated activation of autophagy and autophagy-mediated reduction of oxidative stress. In particular, we describe how ROS impact various signaling pathways of autophagy, including mTORC1-ULK1, AMPK-mTORC1-ULK1, and Keap1-Nrf2-p62, as well as selective autophagy including mitophagy and pexophagy. Precise elucidation of the molecular mechanisms of interactions between ROS and autophagy in the pathogenesis of renal diseases may identify novel targets for development of drugs for preventing renal injury.
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Protective Effects of Broussonetia kazinoki Siebold Fruit Extract against Palmitate-Induced Lipotoxicity in Mesangial Cells. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 2019:4509403. [PMID: 30728845 PMCID: PMC6341277 DOI: 10.1155/2019/4509403] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 12/19/2018] [Accepted: 12/25/2018] [Indexed: 01/06/2023]
Abstract
Diabetic nephropathy is one of the most serious complications of diabetes. Lipotoxicity in glomerular mesangial cells is associated with the progression of diabetic nephropathy. Paper mulberry, Broussonetia kazinoki Siebold (BK), has been used in oriental medicine for human health problems. However, to date, the beneficial effect of BK fruit has not been studied. In this study, we investigated the protective effect of an ethanolic extract of BK fruit (BKFE) against palmitate- (PA-) induced toxicity in mesangial cells. BKFE significantly increased the viability of PA-treated SV40 MES13 cells. BKFE significantly inhibited PA-induced apoptosis and decreased the expression of apoptotic genes, cleaved caspase-3, and cleaved PARP. Moreover, BKFE inhibited the expression of endoplasmic reticulum (ER) stress-related genes, such as BiP, phosphorylated eIF2α, cleaved ATF6, and spliced XBP-1, in PA-treated SV40 MES13 cells. BKFE decreased PA-induced ROS production. In addition, BKFE activated the transcription factor Nrf2 and increased the expression of antioxidant enzymes. However, knockdown of Nrf2 using siRNA suppressed this BKFE-induced increase in antioxidant enzyme expression. Furthermore, the protective effect of BKFE on PA-induced apoptosis was significantly reduced by Nrf2 knockdown. In conclusion, BKFE induced the expression of antioxidant enzymes via activation of Nrf2 and protected against PA-induced lipotoxicity in mesangial cells.
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Yang Y, Wang HX, Zhang L, Huo W, Li XD, Qi RQ, Song XY, Wei S, Gao XH, Han S, Cao L. Inhibition of Heme Oxygenase-1 enhances hyperthermia-induced autophagy and antiviral effect. Int J Biol Sci 2019; 15:568-578. [PMID: 30745843 PMCID: PMC6367586 DOI: 10.7150/ijbs.29759] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 11/15/2018] [Indexed: 12/19/2022] Open
Abstract
Hyperthermia has been clinically utilized as an adjuvant therapy in the treatment of cervical carcinoma. However, thermotolerance induced by heme oxygenase-1 (HO-1), a stress-inducible cytoprotective protein, limits the efficacy of hyperthermic therapy, for which the exact mechanism remains unknown. In the present study, we found that heat treatment induced HO-1 expression and decreased copy number of HPV16 in cervical cancer cells and tissues from cervical cancer and precursor lesions. Knockdown of HO-1 stimulated autophagy accompanied by downregulation of X-linked inhibitor of apoptosis protein. Furthermore, silencing of HO-1 led to cell intolerance to hyperthermia, as manifested by inhibition of cell viability and induction of autophagic apoptosis. Moreover, HO-1 modulated hyperthermia-induced, autophagy-dependent antiviral effect. Thus, the findings indicate that blockade of HO-1 enhances hyperthermia-induced autophagy, an event resulting in apoptosis of cervical cancer cells through an antiviral mechanism. These observations imply the potential clinical utility of hyperthermia in combination with HO-1 inhibition in the treatment of cervical cancer.
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Affiliation(s)
- Yang Yang
- Department of Dermatology, No.1 Hospital of China Medical University and Key Laboratory of Immunodermatology, Ministry of Health and Ministry of Education, Shenyang 110001, China.,Key Laboratory of Medical Cell Biology, China Medical University, Shenyang, 110122, China
| | - He-Xiao Wang
- Department of Dermatology, No.1 Hospital of China Medical University and Key Laboratory of Immunodermatology, Ministry of Health and Ministry of Education, Shenyang 110001, China
| | - Lan Zhang
- Department of Dermatology, No.1 Hospital of China Medical University and Key Laboratory of Immunodermatology, Ministry of Health and Ministry of Education, Shenyang 110001, China
| | - Wei Huo
- Department of Dermatology, No.1 Hospital of China Medical University and Key Laboratory of Immunodermatology, Ministry of Health and Ministry of Education, Shenyang 110001, China
| | - Xiao-Dong Li
- Department of Dermatology, Central Hospital Affiliated to Shen Yang Medical College, Shenyang, 110001, China
| | - Rui-Qun Qi
- Department of Dermatology, No.1 Hospital of China Medical University and Key Laboratory of Immunodermatology, Ministry of Health and Ministry of Education, Shenyang 110001, China
| | - Xiao-Yu Song
- Key Laboratory of Medical Cell Biology, China Medical University, Shenyang, 110122, China
| | - Shi Wei
- Department of Pathology, the University of Alabama at Birmingham, Birmingham, Alabama 35249, United States
| | - Xing-Hua Gao
- Department of Dermatology, No.1 Hospital of China Medical University and Key Laboratory of Immunodermatology, Ministry of Health and Ministry of Education, Shenyang 110001, China
| | - Shuai Han
- Department of Neurosurgery, No.1 Hospital of China Medical University, Shenyang 110001, China
| | - Liu Cao
- Key Laboratory of Medical Cell Biology, China Medical University, Shenyang, 110122, China
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Bian C, Zhong M, Nisar MF, Wu Y, Ouyang M, Bartsch JW, Zhong JL. A novel heme oxygenase-1 splice variant, 14kDa HO-1, promotes cell proliferation and increases relative telomere length. Biochem Biophys Res Commun 2018; 500:429-434. [PMID: 29660345 DOI: 10.1016/j.bbrc.2018.04.096] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 04/12/2018] [Indexed: 12/16/2022]
Abstract
Alternative splicing is a routine phenomenon which greatly increases the diversity of proteins in eukaryotic cells. In humans, most multi-exonic genes are alternatively spliced and their splice variants confer distinct functions. Heme oxygenase-1 (HO-1, 32 kDa) is an inducible stress responsive protein, which possesses multiple functions in many cellular processes. In the current study, we identified a novel alternative splice isoform of 14 kDa HO-1 generated through exclusion of exon 3, and it is highly expressed in immortalized cells. In contrast to nuclear accumulation of the full-length 32 kDa HO-1, the novel 14 kDa HO-1 isoform is retained in the cytoplasm under ultraviolet (UV) irradiation. Interestingly, the 14 kDa HO-1 is shown to promote cell proliferation and an increase in relative telomere lengths in vivo and in vitro. Thus, we are pioneer to report and confirm the presence of a novel splice form of HO-1 and its distinct role in modulating telomere length and tumor growth.
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Affiliation(s)
- Chunxiang Bian
- The Base of "111 Project" for Biomechanics & Tissue Repair Engineering, Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering college, Life Science College, Chongqing University, Chongqing, 400044, China
| | - Maojiao Zhong
- The Base of "111 Project" for Biomechanics & Tissue Repair Engineering, Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering college, Life Science College, Chongqing University, Chongqing, 400044, China
| | - Muhammad Farrukh Nisar
- The Base of "111 Project" for Biomechanics & Tissue Repair Engineering, Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering college, Life Science College, Chongqing University, Chongqing, 400044, China; Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS Institute of Information Technology, Lahore, 54000, Pakistan
| | - Yan Wu
- The Base of "111 Project" for Biomechanics & Tissue Repair Engineering, Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering college, Life Science College, Chongqing University, Chongqing, 400044, China
| | - Mingyue Ouyang
- The Base of "111 Project" for Biomechanics & Tissue Repair Engineering, Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering college, Life Science College, Chongqing University, Chongqing, 400044, China
| | - Jörg W Bartsch
- Department of Neurosurgery, Philipps-University Marburg, Baldingerstr., 35033, Marburg, Germany
| | - Julia Li Zhong
- The Base of "111 Project" for Biomechanics & Tissue Repair Engineering, Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering college, Life Science College, Chongqing University, Chongqing, 400044, China.
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Inhibition of autophagy increased AGE/ROS-mediated apoptosis in mesangial cells. Cell Death Dis 2016; 7:e2445. [PMID: 27809300 PMCID: PMC5260901 DOI: 10.1038/cddis.2016.322] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 09/02/2016] [Accepted: 09/09/2016] [Indexed: 12/17/2022]
Abstract
The aim of our study was to investigate the role of autophagy, a homeostatic process involved in the lysosomal degradation of damaged cell organelles and proteins, in regulating the survival of mesangial cells treated with advanced glycation end products (AGEs). In the present study, AGEs induced mitochondrial depolarization and led to mitochondrial-dependent apoptosis in mesangial cells, as shown by the loss of the mitochondrial membrane potential; increased Bax processing; increased Caspase-9, Caspase-3 and PARP cleavage; and decreased Bcl-2 expression. Meanwhile, AGEs also triggered autophagy flux in mesangial cells, as confirmed by the presence of autophagic vesicles, the conversion of LC3II/LC3I and the increase/decrease in Beclin-1/p62 expression. Interestingly, this study reported apparent apoptosis and autophagy that were dependent on reactive oxygen species (ROS) production. Scavenging ROS with N-acetyl-l-cysteine could prevent the appearance of the autophagic features and reverse AGE-induced apoptosis. Moreover, AGE-triggered mitophagy, which was confirmed by the colocalization of autophagosomes and mitochondria and Parkin translocation to mitochondria, played a potential role in reducing ROS production in mesangial cells. Additionally, inhibition of autophagy significantly enhanced AGE-induced cell apoptosis. Taken together, our data suggest that ROS were the mediators of AGE-induced mesangial cell apoptosis and that autophagy was likely to be the mechanism that was triggered to repair the ROS-induced damage in the AGE-treated cells and thereby promote cell survival. This study provides new insights into the molecular mechanism of autophagy involved in AGE-induced apoptosis in mesangial cells.
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