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Zhao L, Li Y, Wang W, Qi X, Wang S, Song W, Li T, Gao W. Regulating NCOA4-Mediated Ferritinophagy for Therapeutic Intervention in Cerebral Ischemia-Reperfusion Injury. Neurochem Res 2024:10.1007/s11064-024-04146-4. [PMID: 38713437 DOI: 10.1007/s11064-024-04146-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 02/11/2024] [Accepted: 05/02/2024] [Indexed: 05/08/2024]
Abstract
Ischemic stroke presents a global health challenge, necessitating an in-depth comprehension of its pathophysiology and therapeutic strategies. While reperfusion therapy salvages brain tissue, it also triggers detrimental cerebral ischemia-reperfusion injury (CIRI). In our investigation, we observed the activation of nuclear receptor coactivator 4 (NCOA4)-mediated ferritinophagy in an oxygen-glucose deprivation/reoxygenation (OGD/R) model using HT22 cells (P < 0.05). This activation contributed to oxidative stress (P < 0.05), enhanced autophagy (P < 0.05) and cell death (P < 0.05) during CIRI. Silencing NCOA4 effectively mitigated OGD/R-induced damage (P < 0.05). These findings suggested that targeting NCOA4-mediated ferritinophagy held promise for preventing and treating CIRI. Subsequently, we substantiated the cyclic GMP-AMP synthase (cGAS)-stimulator of interferon genes (STING) pathway effectively regulated the NCOA4-mediated ferritinophagy, by applying the cGAS inhibitor RU.521 and performing NCOA4 overexpression (P < 0.05). Suppressing the cGAS-STING pathway efficiently curtailed ferritinophagy (P < 0.05), oxidative stress (P < 0.05), and cell damage (P < 0.05) of CIRI, while NCOA4 overexpression could alleviate this effect (P < 0.05). Finally, we elucidated the specific molecular mechanism underlying the protective effect of the iron chelator deferoxamine (DFO) on CIRI. Our findings revealed that DFO alleviated hypoxia-reoxygenation injury in HT22 cells through inhibiting NCOA4-mediated ferritinophagy and reducing ferrous ion levels (P < 0.05). However, the protective effects of DFO were counteracted by cGAS overexpression (P < 0.05). In summary, our results indicated that the activation of the cGAS-STING pathway intensified cerebral damage during CIRI by inducing NCOA4-mediated ferritinophagy. Administering the iron chelator DFO effectively attenuated NCOA4-induced ferritinophagy, thereby alleviating CIRI. Nevertheless, the role of the cGAS-STING pathway in CIRI regulation likely involves intricate mechanisms, necessitating further validation in subsequent investigations.
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Affiliation(s)
- Lan Zhao
- Department of Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Yanan Li
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Wei Wang
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Xue Qi
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Su Wang
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Wenqin Song
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Ting Li
- Department of Skin Medical Cosmetology, Renmin Hospital of Wuhan University, Wuhan, 430060, China.
| | - Wenwei Gao
- Department of Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, 430060, China.
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Yang S, Hu C, Chen X, Tang Y, Li J, Yang H, Yang Y, Ying B, Xiao X, Li SZ, Gu L, Zhu Y. Crosstalk between metabolism and cell death in tumorigenesis. Mol Cancer 2024; 23:71. [PMID: 38575922 PMCID: PMC10993426 DOI: 10.1186/s12943-024-01977-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Accepted: 03/02/2024] [Indexed: 04/06/2024] Open
Abstract
It is generally recognized that tumor cells proliferate more rapidly than normal cells. Due to such an abnormally rapid proliferation rate, cancer cells constantly encounter the limits of insufficient oxygen and nutrient supplies. To satisfy their growth needs and resist adverse environmental events, tumor cells modify the metabolic pathways to produce both extra energies and substances required for rapid growth. Realizing the metabolic characters special for tumor cells will be helpful for eliminating them during therapy. Cell death is a hot topic of long-term study and targeting cell death is one of the most effective ways to repress tumor growth. Many studies have successfully demonstrated that metabolism is inextricably linked to cell death of cancer cells. Here we summarize the recently identified metabolic characters that specifically impact on different types of cell deaths and discuss their roles in tumorigenesis.
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Affiliation(s)
- Shichao Yang
- School of Medicine, Chongqing University, Chongqing, 400030, P. R. China
| | - Caden Hu
- School of Medicine, Chongqing University, Chongqing, 400030, P. R. China
| | - Xiaomei Chen
- School of Medicine, Chongqing University, Chongqing, 400030, P. R. China
| | - Yi Tang
- Molecular Medicine Diagnostic and Testing Center, Chongqing Medical University, Chongqing, P. R. China
- Department of Pathology, College of Basic Medicine, Chongqing Medical University, Chongqing, P. R. China
| | - Juanjuan Li
- Department of breast and thyroid surgery, Renmin hospital of Wuhan University, Wuhan, 430060, P. R. China
| | - Hanqing Yang
- School of Medicine, Chongqing University, Chongqing, 400030, P. R. China
| | - Yi Yang
- Institute of Pathology and Southwest Cancer Center, The First Affiliated Hospital, Key Laboratory of Tumor Immunopathology, Third Military Medical University (Army Medical University, Ministry of Education of China, Chongqing, 400038, P. R. China
| | - Binwu Ying
- Department of Laboratory Medicine/Clinical Laboratory Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan Province, 610041, P. R. China.
| | - Xue Xiao
- Department of Gynecology and Obstetrics, West China Second University Hospital, Sichuan University, Chengdu, P. R. China.
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second Hospital, Sichuan University, Chengdu, P. R. China.
| | - Shang-Ze Li
- School of Medicine, Chongqing University, Chongqing, 400030, P. R. China.
| | - Li Gu
- Department of Laboratory Medicine/Clinical Laboratory Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan Province, 610041, P. R. China.
| | - Yahui Zhu
- School of Medicine, Chongqing University, Chongqing, 400030, P. R. China.
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Zhang T, Wu J, Yao X, Zhang Y, Wang Y, Han Y, Wu Y, Xu Z, Lan J, Han S, Zou H, Sun Q, Wang D, Zhang J, Wang G. The Aldose Reductase Inhibitor Epalrestat Maintains Blood-Brain Barrier Integrity by Enhancing Endothelial Cell Function during Cerebral Ischemia. Mol Neurobiol 2023; 60:3741-3757. [PMID: 36940077 DOI: 10.1007/s12035-023-03304-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 03/08/2023] [Indexed: 03/21/2023]
Abstract
Excessive activation of aldose reductase (AR) in the brain is a risk factor for aggravating cerebral ischemia injury. Epalrestat is the only AR inhibitor with proven safety and efficacy, which is used in the clinical treatment of diabetic neuropathy. However, the molecular mechanisms underlying the neuroprotection of epalrestat remain unknown in the ischemic brain. Recent studies have found that blood-brain barrier (BBB) damage was mainly caused by increased apoptosis and autophagy of brain microvascular endothelial cells (BMVECs) and decreased expression of tight junction proteins. Thus, we hypothesized that the protective effect of epalrestat is mainly related to regulating the survival of BMVECs and tight junction protein levels after cerebral ischemia. To test this hypothesis, a mouse model of cerebral ischemia was established by permanent middle cerebral artery ligation (pMCAL), and the mice were treated with epalrestat or saline as a control. Epalrestat reduced the ischemic volume, enhanced BBB function, and improved the neurobehavior after cerebral ischemia. In vitro studies revealed that epalrestat increased the expression of tight junction proteins, and reduced the levels of cleaved-caspase3 and LC3 proteins in mouse BMVECs (bEnd.3 cells) exposed to oxygen-glucose deprivation (OGD). In addition, bicalutamide (an AKT inhibitor) and rapamycin (an mTOR inhibitor) increased the epalrestat-induced reduction in apoptosis and autophagy related protein levels in bEnd.3 cells with OGD treatment. Our findings suggest that epalrestat improves BBB function, which may be accomplished by reducing AR activation, promoting tight junction proteins expression, and upregulating AKT/mTOR signaling pathway to inhibit apoptosis and autophagy in BMVECs.
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Affiliation(s)
- Tongshuai Zhang
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Jinrong Wu
- Department of Anaesthesiology, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, Heilongjiang, China
| | - Xinmin Yao
- Traditional Chinese Medicine, Heilongjiang University of Chinese Medicine, Harbin, 150040, Heilongjiang, China
| | - Yao Zhang
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Yue Wang
- Department of Anesthesiology, Second Affiliated Hospital of Air Force Medical University, Xi'an, 710032, Shaanxi, China
| | - Yang Han
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Yun Wu
- The Medical Department of Neurology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150001, Heilongjiang, China
| | - Zhenyu Xu
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Jing Lan
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Siyu Han
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Haifeng Zou
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Qixu Sun
- Department of Gastroenterology, Penglai People's Hospital, Yantai, 264117, Shandong, China
| | - Dandan Wang
- Wu Lian De Memorial Hospital, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, Heilongjiang, China.
| | - Jingyu Zhang
- The Medical Department of Neurology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, 150001, Heilongjiang, China.
| | - Guangyou Wang
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China.
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Li B, Li P, Weng R, Wu Z, Qin B, Fang J, Wang Y, Qiu S, Yang J, Gu L. Trehalose protects motorneuron after brachial plexus root avulsion by activating autophagy and inhibiting apoptosis mediated by the AMPK signaling pathway. Gene 2020; 768:145307. [PMID: 33197516 DOI: 10.1016/j.gene.2020.145307] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 10/18/2020] [Accepted: 11/10/2020] [Indexed: 12/12/2022]
Abstract
Brachial plexus root avulsion (BPRA) is one of the most serious injuries of the upper extremity, which requires more effective treatment. Trehalose, a natural disaccharide, has reported to has a protective effect in neurodegenerative diseases. However, the effective effects and mechanism of trehalose on BPRA are still unclear. BPRA rat model were established, and then effects of trehalose on BPRA were investigated. TBHP-treated NSC34 cells with or without trehalose treatment were used for mechanism studies by Western blotting, Immunofluorescence and Flow cytometry analysis. Trehalose elevated the survival of motor neurons in rats after BPRA, suggesting a protective role of trehlose on BPRA. Trehalose treatment in rats after BPRA enhanced the autophage and thus inhibited apoptosis compared with rats in Vehicle group. Moreover, in TBHP-treated NSC34 cells, trehalose promoted the expression of autophage-related markers (LC3 and Beclin-1), concomitant with decreased levels of apoptosis. In vitro mechanism study indicated that the regulations of trehalose on autophage and apoptosis were via the AMPK-ULK1 pathway. Trehalose protects injured MNs by enhancing autophage and inhibiting apoptosis, which demonstrating the essential role of trehalose in the prevention and treatment of BPRA.
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Affiliation(s)
- Bohan Li
- Department of Microsurgery & Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Er Road, Guangzhou 510080, China
| | - Ping Li
- Department of Microsurgery & Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Er Road, Guangzhou 510080, China
| | - Ricong Weng
- Department of Microsurgery & Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Er Road, Guangzhou 510080, China
| | - Zichao Wu
- Department of Microsurgery & Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Er Road, Guangzhou 510080, China
| | - Bengang Qin
- Department of Microsurgery & Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Er Road, Guangzhou 510080, China
| | - Jingtao Fang
- Department of Microsurgery & Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Er Road, Guangzhou 510080, China
| | - Yuanyuan Wang
- Department of Microsurgery & Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Er Road, Guangzhou 510080, China
| | - Shuai Qiu
- Department of Microsurgery & Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Er Road, Guangzhou 510080, China
| | - Jiantao Yang
- Department of Microsurgery & Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Er Road, Guangzhou 510080, China.
| | - Liqiang Gu
- Department of Microsurgery & Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Er Road, Guangzhou 510080, China.
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Wang Q, Liu X. The dual functions of α-tubulin acetylation in cellular apoptosis and autophage induced by tanespimycin in lung cancer cells. Cancer Cell Int 2020; 20:369. [PMID: 32774163 PMCID: PMC7409415 DOI: 10.1186/s12935-020-01453-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 07/25/2020] [Indexed: 12/16/2022] Open
Abstract
Background Reversible acetylation of α-tubulin has been implicated in modulating microtuble structures and functions, which may subsequently involve in cellular apoptosis and autophage. But how to trigger apoptosis or autophage at what level of acetylated α-tubulin (Ac-α-tubulin) are not known. This study aims to demonstrate the dual functions and molecular mechanisms of α-tubulin acetylation in cellular apoptosis and autophage induced by tanespimycin in Calu-1 cells simultaneously. Methods Calu-1 cells were treated with tanespimycin alone or combined administrations of different agents (including TSA, Docetaxel, Rapamycin, 3-MA and Z-vad) respectively and cell lysates were prepared to detect the given proteins by Western Blot. The cell survival was observed by inverted phase contrast microscope and estimated by SRB assay. HDAC6, TAT1 and Hsp90α/β proteins were knocked down by siRNA technique. Results By combination administration of tanespimycin with TSA or Docetaxel, the expression of Ac-α-tubulin and cellular apoptosis were enhanced markedly. While combination of tanespimycin and Rapamycin, α-tubulin acetylation and apoptosis were inhibited, but LC3B-II expression was facilitated substantially. When tanespimycin was combined with autophage inhibitor 3-MA, α-tubulin acetylation elevation was apparently, but LC3B-II was attenuated. Apoptosis inhibitor Z-vad blocked partially Caspases activation induced by tanespimycin, but failed to hinder α-tubulin acetylation elevation. According to results of RNA interference, acetyltransferase TAT1, deacetylase HDAC6 and Hsp90 modulated the expression level of α-tubulin acetylation. Conclusion We have elucidated that acetylation of α-tubulin induced by tanespimycin has dual functions in cellular apoptosis and autophage and the level of α-tubulin acetylation reaches a degree Calu-1 cells undergo cell apoptosis rather than autophage, implying that the level of acetylated α-tubulin may determine cell fate for survival or apoptosis.
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Affiliation(s)
- Qilin Wang
- Liaocheng University School of Life Sciences, No. 1, Hunan Road, Dongchangfu District, Liaocheng, 252059 People's Republic of China
| | - Xiangguo Liu
- Shandong University School of Life Sciences, 72 Binhai RD, Qingdao, 266237 People's Republic of China
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Sun X, Li W, Deng Y, Dong B, Sun Y, Xue Y, Wang Y. Hepatic conditional knockout of ATF6 exacerbates liver metabolic damage by repressing autophage through MTOR pathway. Biochem Biophys Res Commun 2018; 505:45-50. [PMID: 30236984 DOI: 10.1016/j.bbrc.2018.09.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 09/08/2018] [Indexed: 12/19/2022]
Abstract
The liver is a central metabolic organ. Activating transcription factor 6 (ATF6) acts as an ER stress responsive gene and is reported to attenuate hepatic steatosis. Over expressing a dominant-negative form of ATF6 exacerbates glucose intolerance and insulin resistance. In the present study, we used the conditional knockout technique to specifically knockout ATF6 in the mouse liver. We used qPCR to detect the mRNA levels of related genes. Western blot analysis was used to evaluate protein levels. Flow cytometry assay showed the apoptosis status. Glucose tolerance tests and insulin tolerance tests were used to determine glucose and insulin sensitivity. The results showed that liver specific knockout of ATF6 exacerbated HFD-induced hepatic steatosis and glucose tolerance. Abolished ATF6 exacerbated gluconeogenic metabolism by MTOR mediated down regulation of autophage. In conclusion, these findings suggest that therapeutic strategies by supplementing ATF6 may be beneficial for the treatment of glucose intolerance as well as insulin resistance in the high fat induced liver metabolic damage condition.
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Affiliation(s)
- Xiaofang Sun
- Department of Endocrinology and Metabolic Diseases, The Affiliated Hospital of Qingdao University, 266003, Shandong, China
| | - Wei Li
- Department of Interventional Radiology, The Affiliated Hospital of Qingdao University, 266003, Shandong, China
| | - Yujie Deng
- Department of Endocrinology and Metabolic Diseases, The Affiliated Hospital of Qingdao University, 266003, Shandong, China
| | - Bingzi Dong
- Department of Endocrinology and Metabolic Diseases, The Affiliated Hospital of Qingdao University, 266003, Shandong, China
| | - Ying Sun
- Health Management Center, The Affiliated Hospital of Qingdao University, 266003, Shandong, China
| | - Yu Xue
- Department of Endocrinology and Metabolic Diseases, The Affiliated Hospital of Qingdao University, 266003, Shandong, China
| | - Yangang Wang
- Department of Endocrinology and Metabolic Diseases, The Affiliated Hospital of Qingdao University, 266003, Shandong, China.
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Abstract
In cancer research, autophagy has been revealed as one of the major ways to maintain the metabolism of cancer cells, including glioma cells, through protein degradation. Meanwhile, autophagy is also regarded as a kind of mechanism to protect glioma cells from a harmful stimulus, such as chemical and radiation treatment. So, the inhibition of autophagy may be very helpful in curing glioma. This study aimed to determine the effect of autophagic inhibition on glioma cells using tubacin, a specific inhibitor of histone deacetylase 6(HDAC6). According to the results, tubacin inhibited the growth of both U251 and LN229 cells, which was accompanied by lower HDAC6 activity and accumulated autophagosome. The inhibition of HDCA6 also led to accumulation of autophagosome and death of glioma cells. Moreover, the combined treatment of tubacin and temozolomide, an alkylating agent used to treat glioblastoma, induced more severe glioma cell death. Thus, it can be concluded that inhibition of HDAC6 suppressed growth and drug resistance of glioma cells in-vitro through autophagic suppression and blocking of fusion of autophagosome and lysosome.
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Affiliation(s)
- Changjiang Yin
- Department of Neurosurgery, Shandong Province Third Hospital, Jinan, Shandong, China
| | - Pibao Li
- Intensive Care Unit, Shandong Province Third Hospital, 12 Wuyingshan Middle Road, Jinan, Shandong, 250031, China
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