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Kumariya S, Grano de Oro A, Nestor-Kalinoski AL, Joe B, Osman I. Gut microbiota-derived Metabolite, Shikimic Acid, inhibits vascular smooth muscle cell proliferation and migration. Biochem Pharmacol 2024; 229:116524. [PMID: 39251142 DOI: 10.1016/j.bcp.2024.116524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 07/25/2024] [Accepted: 09/05/2024] [Indexed: 09/11/2024]
Abstract
Gut microbiota dysbiosis is linked to vascular wall disease, but the mechanisms by which gut microbiota cross-talk with the host vascular cells remain largely unknown. Shikimic acid (SA) is a biochemical intermediate synthesized in plants and microorganisms, but not mammals. Surprisingly, recent metabolomic profiling data demonstrate that SA is detectable in human and murine blood. In this study, analyzing data from germ-free rats, we provide evidence in support of SA as a bona fide gut microbiota-derived metabolite, emphasizing its biological relevance. Since vascular cells are the first cells exposed to circulating metabolites, in this study, we examined, for the first time, the effects and potential underlying molecular mechanisms of SA on vascular smooth muscle cell (VSMC) proliferation and migration, which play a key role in occlusive vascular diseases, such as post-angioplasty restenosis and atherosclerosis. We found that SA inhibits the proliferation and migration of human coronary artery SMCs. At the molecular level, unexpectedly, we found that SA activates, rather than inhibits, multiple pro-mitogenic signaling pathways in VSMCs, such as ERK1/2, AKT, and mTOR/p70S6K. Conversely, we found that SA activates the anti-proliferative AMP-activated protein kinase (AMPK) in VSMCs, a key cellular energy sensor and regulator. However, loss-of-function experiments demonstrate that AMPK does not mediate the inhibitory effects of SA on VSMC proliferation. In conclusion, these studies demonstrate that a microbiota-derived metabolite, SA, inhibits VSMC proliferation and migration in vitro and prompt further evaluation of the possible underlying molecular mechanisms and the potential protective role in VSMC-related vascular wall disease in vivo.
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Affiliation(s)
- Sanjana Kumariya
- Department of Physiology and Pharmacology, Center for Hypertension and Personalized Medicine, University of Toledo, College of Medicine and Life Sciences, Toledo, OH, USA
| | - Arturo Grano de Oro
- Department of Physiology and Pharmacology, Center for Hypertension and Personalized Medicine, University of Toledo, College of Medicine and Life Sciences, Toledo, OH, USA
| | | | - Bina Joe
- Department of Physiology and Pharmacology, Center for Hypertension and Personalized Medicine, University of Toledo, College of Medicine and Life Sciences, Toledo, OH, USA
| | - Islam Osman
- Department of Physiology and Pharmacology, Center for Hypertension and Personalized Medicine, University of Toledo, College of Medicine and Life Sciences, Toledo, OH, USA.
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Sung JY, Kim SG, Park SY, Kim JR, Choi HC. Telomere stabilization by metformin mitigates the progression of atherosclerosis via the AMPK-dependent p-PGC-1α pathway. Exp Mol Med 2024:10.1038/s12276-024-01297-w. [PMID: 39223261 DOI: 10.1038/s12276-024-01297-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 05/13/2024] [Accepted: 05/21/2024] [Indexed: 09/04/2024] Open
Abstract
Telomere dysfunction is a well-known molecular trigger of senescence and has been associated with various age-related diseases, including atherosclerosis. However, the mechanisms involved have not yet been elucidated, and the extent to which telomeres contribute to atherosclerosis is unknown. Therefore, we investigated the mechanism of metformin-induced telomere stabilization and the ability of metformin to inhibit vascular smooth muscle cell (VSMC) senescence caused by advanced atherosclerosis. The present study revealed that metformin inhibited the phenotypes of atherosclerosis and senescence in VSMCs. Metformin increased the phosphorylation of AMPK-dependent PGC-1α and thus increased telomerase activity and the protein level of TERT in OA-treated VSMCs. Mechanistically, the phosphorylation of AMPK and PGC-1α by metformin not only enhanced telomere function but also increased the protein level of TERT, whereas TERT knockdown accelerated the development of atherosclerosis and senescent phenotypes in OA-treated VSMCs regardless of metformin treatment. Furthermore, the in vivo results showed that metformin attenuated the formation of atherosclerotic plaque markers in the aortas of HFD-fed ApoE KO mice. Although metformin did not reduce plaque size, it inhibited the phosphorylation of the AMPK/PGC-1α/TERT signaling cascade, which is associated with the maintenance and progression of plaque formation, in HFD-fed ApoE KO mice. Accordingly, metformin inhibited atherosclerosis-associated phenotypes in vitro and in vivo. These observations show that the enhancement of telomere function by metformin is involved in specific signaling pathways during the progression of atherosclerosis. These findings suggest that telomere stabilization by metformin via the AMPK/p-PGC-1α pathway might provide a strategy for developing therapeutics against vascular diseases such as atherosclerosis.
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Affiliation(s)
- Jin Young Sung
- Department of Pharmacology, College of Medicine, Yeungnam University, 170 Hyunchung-Ro, Nam-Gu, Daegu, 42415, Republic of Korea
- Senotherapy-based Metabolic Disease Control Research Center, College of Medicine, Yeungnam University, 170 Hyunchung-Ro, Nam-Gu, Daegu, 42415, Republic of Korea
| | - Seul Gi Kim
- Department of Pharmacology, College of Medicine, Yeungnam University, 170 Hyunchung-Ro, Nam-Gu, Daegu, 42415, Republic of Korea
- Senotherapy-based Metabolic Disease Control Research Center, College of Medicine, Yeungnam University, 170 Hyunchung-Ro, Nam-Gu, Daegu, 42415, Republic of Korea
| | - So-Young Park
- Senotherapy-based Metabolic Disease Control Research Center, College of Medicine, Yeungnam University, 170 Hyunchung-Ro, Nam-Gu, Daegu, 42415, Republic of Korea
- Department of Physiology, College of Medicine, Yeungnam University, 170 Hyunchung-Ro, Nam-Gu, Daegu, 42415, Republic of Korea
| | - Jae-Ryong Kim
- Senotherapy-based Metabolic Disease Control Research Center, College of Medicine, Yeungnam University, 170 Hyunchung-Ro, Nam-Gu, Daegu, 42415, Republic of Korea
- Department of Biochemistry and Molecular Biology, College of Medicine, Yeungnam University, 170 Hyunchung-Ro, Nam-Gu, Daegu, 42415, Republic of Korea
| | - Hyoung Chul Choi
- Department of Pharmacology, College of Medicine, Yeungnam University, 170 Hyunchung-Ro, Nam-Gu, Daegu, 42415, Republic of Korea.
- Senotherapy-based Metabolic Disease Control Research Center, College of Medicine, Yeungnam University, 170 Hyunchung-Ro, Nam-Gu, Daegu, 42415, Republic of Korea.
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Zhang WY, Xue MQ, Tang Y, Wang T, Wang XZ, Zhang JJ. AMPK regulates immature boar Sertoli cell proliferation through affecting CDK4/Cyclin D3 pathway and mitochondrial function. Theriogenology 2024; 224:9-18. [PMID: 38714024 DOI: 10.1016/j.theriogenology.2024.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 05/02/2024] [Accepted: 05/03/2024] [Indexed: 05/09/2024]
Abstract
Sertoli cell (SC) proliferation plays an important role in sperm production and quality; however, the regulatory mechanism of SC proliferation is not well understood. This study investigated the role of adenosine monophosphate-activated protein kinase (AMPK) in the regulation of immature boar SC activity. Cell counting kit-8, Seahorse XFe96, mitochondrial respiratory enzyme-related assay kits, and transmission electron microscopy were used to detect SC proliferative viability, oxygen consumption rate (OCR), mitochondrial respiratory enzyme activity, and the ultrastructure of primary cultured SCs in vitro from the testes of 21-day-old boars. A dual luciferase reporter assay was performed to determine the miRNA-mRNA target interaction. Western blotting was used to analyze cell proliferation-related protein expression of p38, p21, proliferating cell nuclear antigen (PCNA), Cyclin-dependent kinase 4 (CDK4), Cyclin D3, and phosphorylated retinoblastoma protein (Rb). Each experiment had a completely randomized design, with three replicates in each experiment. The results showed that the AMPK inhibitor (Compound C, 20 μM-24 h) increased cell proliferation viability, ATP production, and maximal respiration of SCs by 0.64-, 0.12-, and 0.08-fold (p < 0.05), respectively; increased the SC protein expression of PCNA, CDK4, Cyclin D3, and p-Rb by 0.13-, 0.09-, 0.88-, and 0.12-fold (p < 0.05), respectively; and decreased the SC protein expression of p38 and p21 by 0.36- and 0.27-fold (p < 0.05), respectively. The AMPK agonist AICAR (2 mM-6 h) significantly inhibited SC ultrastructure, OCR, mitochondrial respiratory enzyme activity, and cell proliferation-related protein levels. AMPK was validated to be a target gene of miR-1285 based on the result in which the miR-1285 mimic inhibited the luciferase activity of wild-type AMPK by 0.54-fold (p < 0.001). MiR-1285 mimic promoted the OCR of SCs, with 0.45-, 0.15-, 0.21-, and 0.30-fold (p < 0.01) increases in ATP production, basal and maximal respiration, and spare capacity, respectively. MiR-1285 mimic increased the mitochondrial respiratory enzyme activity of SCs, with 0.63-, 0.70-, and 0.97-fold (p < 0.01) increases in NADH-Q oxidoreductase, cytochrome c oxidase, and ATP synthase, respectively. Moreover, the miR-1285 mimic increased the protein expression of PCNA, CDK4, Cyclin D3, and p-Rb by 0.24-, 0.30-, 0.22-, and 0.13-fold (p < 0.05), respectively, and reduced the protein expression of p38 and p21 by 0.58- and 0.66-fold (p < 0.001). MiR-1285 inhibitor showed opposite effects on the above indicators and induced numerous autophagosomes and large lipid droplets in SCs. A high dose of estradiol (10 μM-6 h, showed a promotion of AMPK activation in a previous study) significantly inhibited SC ultrastructure, mitochondrial function, and proliferation-related pathways, while these adverse effects were weakened by Compound C treatment or miR-1285 mimic transfection. Our findings suggest that the activation and inhibition of AMPK induced by specific drugs or synthesized targeted miRNA fragments could regulate immature boar SC proliferative activity by influencing the CDK4/Cyclin D3 pathway and mitochondrial function; this helps to provide a basis for the prevention and treatment of male sterility in clinical practice.
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Affiliation(s)
- Wen Yu Zhang
- Chongqing Key Laboratory of Forage and Herbivore, College of Veterinary Medicine, Southwest University, Chongqing, 400715, PR China
| | - Meng Qing Xue
- Chongqing Key Laboratory of Forage and Herbivore, College of Veterinary Medicine, Southwest University, Chongqing, 400715, PR China
| | - Yao Tang
- Chongqing Key Laboratory of Forage and Herbivore, College of Veterinary Medicine, Southwest University, Chongqing, 400715, PR China
| | - Tao Wang
- Chongqing Key Laboratory of Forage and Herbivore, College of Veterinary Medicine, Southwest University, Chongqing, 400715, PR China
| | - Xian Zhong Wang
- Chongqing Key Laboratory of Forage and Herbivore, College of Veterinary Medicine, Southwest University, Chongqing, 400715, PR China
| | - Jiao Jiao Zhang
- Chongqing Key Laboratory of Forage and Herbivore, College of Veterinary Medicine, Southwest University, Chongqing, 400715, PR China.
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Siteni S, Barron S, Luitel K, Shay JW. Radioprotective effect of the anti-diabetic drug metformin. PLoS One 2024; 19:e0307598. [PMID: 39042641 PMCID: PMC11265658 DOI: 10.1371/journal.pone.0307598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Accepted: 07/08/2024] [Indexed: 07/25/2024] Open
Abstract
Metformin is a biguanide currently used in the treatment of diabetes mellitus type 2. Besides its anti-glycemic effects, metformin has been reported to induce different cellular pleiotropic effects, depending on concentration and time of treatment. Here we report one administration of metformin (0.5 mM) has radioprotective effects in vitro on BJ human fibroblasts, increasing DNA damage repair and increasing SOD1 expression in the nucleus. Importantly, metformin (200 mg/kg) pre-administration for only 3 days in wild type 129/sv mice, decreases the formation of micronuclei in bone marrow cells and DNA damage in colon and lung tissues compared to control irradiated mice at sub-lethal and lethal doses, increasing the overall survival fraction by 37% after 10Gy total body irradiation. We next pre-treated with metformin and then exposed 129/sv mice, to a galactic cosmic rays simulation (GCRsim), at the NASA Space Radiation Laboratory (NSRL). We found metformin pre-treatment decreases the presence of bone marrow micronuclei and DNA damage in colon and lung tissues and an increase of 8-oxoguanine DNA glycosylase-1 (OGG1) expression. Our data highlight a radioprotective effect of metformin through an indirect modulation of the gene expression involved in the cellular detoxification rather than its effects on mitochondria.
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Affiliation(s)
- Silvia Siteni
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Summer Barron
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Krishna Luitel
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Jerry W. Shay
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
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Vlavcheski F, MacPherson REK, Fajardo V, Sze N, Tsiani E. Carnosic Acid (CA) Induces a Brown Fat-like Phenotype, Increases Mitochondrial Biogenesis, and Activates AMPK in 3T3-L1 Adipocytes. Biomedicines 2024; 12:1569. [PMID: 39062141 PMCID: PMC11274535 DOI: 10.3390/biomedicines12071569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Revised: 07/10/2024] [Accepted: 07/11/2024] [Indexed: 07/28/2024] Open
Abstract
Adipose tissue plays a crucial role in regulating metabolic homeostasis, and its dysfunction in obesity leads to insulin resistance and type 2 diabetes (T2D). White adipose tissue (WAT) primarily stores energy as lipids, while brown adipose tissue (BAT) regulates thermogenesis by dissipating energy as heat. The process of browning involves the transdifferentiation of WAT into brown-like or beige adipocytes, which exhibit a similar phenotype as BAT. The browning of WAT is an attractive approach against obesity and T2D, and the activation of the energy sensor AMP-activated protein kinase (AMPK) has been shown to play a role in browning. Carnosic acid (CA), a polyphenolic diterpene, found in many plants including rosemary, is reported to possess potent antioxidant, anti-inflammatory, and anti-hyperglycemic properties. The limited evidence available indicates that CA activates AMPK and may have anti-obesity and antidiabetic potential; however, the effects in adipocyte browning remain largely unexplored. This study aimed to examine the effects of CA on the markers of adipocyte browning. The treatment of 3T3L1 adipocytes with CA activated AMPK, reduced lipid accumulation, and increased the expression of browning protein markers (UCP-1, PGC-1α, PRDM16, and TFAM) and mitochondrial biogenesis. The use of compound C, an AMPK inhibitor, significantly attenuated the effects of CA, indicating AMPK involvement. These studies demonstrate that CA can activate AMPK and stimulate the browning of white adipocytes. Future animal and human studies are required to examine the effects of CA in vivo.
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Affiliation(s)
- Filip Vlavcheski
- Department of Health Sciences, Brock University, St. Catharines, ON L2S 3A1, Canada
- Centre for Bone and Muscle Health, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Rebecca E. K. MacPherson
- Department of Health Sciences, Brock University, St. Catharines, ON L2S 3A1, Canada
- Centre for Bone and Muscle Health, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Val Fajardo
- Department of Health Sciences, Brock University, St. Catharines, ON L2S 3A1, Canada
- Centre for Bone and Muscle Health, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Newman Sze
- Department of Health Sciences, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Evangelia Tsiani
- Department of Health Sciences, Brock University, St. Catharines, ON L2S 3A1, Canada
- Centre for Bone and Muscle Health, Brock University, St. Catharines, ON L2S 3A1, Canada
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Zhu LH, Liang YP, Yang L, Zhu F, Jia LJ, Li HG. Cycloastragenol induces apoptosis and protective autophagy through AMPK/ULK1/mTOR axis in human non-small cell lung cancer cell lines. JOURNAL OF INTEGRATIVE MEDICINE 2024; 22:503-514. [PMID: 38849220 DOI: 10.1016/j.joim.2024.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 05/16/2024] [Indexed: 06/09/2024]
Abstract
OBJECTIVE Studies have demonstrated that cycloastragenol induces antitumor effects in prostate, colorectal and gastric cancers; however, its efficacy for inhibiting the proliferation of lung cancer cells is largely unexplored. This study explores the efficacy of cycloastragenol for inhibiting non-small cell lung cancer (NSCLC) and elucidates the underlying molecular mechanisms. METHODS The effects of cycloastragenol on lung cancer cell proliferation were assessed using an adenosine triphosphate monitoring system based on firefly luciferase and clonogenic formation assays. Cycloastragenol-induced apoptosis in lung cancer cells was evaluated using dual staining flow cytometry with an annexin V-fluorescein isothiocyanate/propidium iodide kit. To elucidate the role of cycloastragenol in the induction of apoptosis, apoptosis-related proteins were examined using Western blots. Immunofluorescence and Western blotting were used to determine whether cycloastragenol could induce autophagy in lung cancer cells. Genetic techniques, including small interfering RNA technology, were used to investigate the underlying mechanisms. The effects against lung cancer and biosafety of cycloastragenol were evaluated using a mouse subcutaneous tumor model. RESULTS Cycloastragenol triggered both autophagy and apoptosis. Specifically, cycloastragenol promoted apoptosis by facilitating the accumulation of phorbol-12-myristate-13-acetate-induced protein 1 (NOXA), a critical apoptosis-related protein. Moreover, cycloastragenol induced a protective autophagy response through modulation of the adenosine 5'-monophosphate-activated protein kinase (AMPK)/unc-51-like autophagy-activating kinase (ULK1)/mammalian target of rapamycin (mTOR) pathway. CONCLUSION Our study sheds new light on the antitumor efficacy and mechanism of action of cycloastragenol in NSCLC. This insight provides a scientific basis for exploring combination therapies that use cycloastragenol and inhibiting the AMPK/ULK1/mTOR pathway as a promising approach to combating lung cancer. Please cite this article as follows: Zhu LH, Liang YP, Yang L, Zhu F, Jia LJ, Li HG. Cycloastragenolinduces apoptosis and protective autophagy through AMPK/ULK1/mTOR axis in human non-small celllung cancer cell lines. J Integr Med. 2024; 22(4): 504-515.
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Affiliation(s)
- Li-Hua Zhu
- Department of Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China; Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Yu-Pei Liang
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Lian Yang
- Department of Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Feng Zhu
- Department of Laboratory Medicine, Huadong Hospital, Fudan University, Shanghai 200237, China
| | - Li-Jun Jia
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China.
| | - He-Gen Li
- Department of Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China.
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Wang XH, Shen CP, Wang TT, Huang Y, Jin Y, Zhou MY, Zhang MY, Gu SL, Wang MQ, Liu ZC, Li R, Cai L. Shikonin suppresses rheumatoid arthritis by inducing apoptosis and autophagy via modulation of the AMPK/mTOR/ULK-1 signaling pathway. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 128:155512. [PMID: 38460357 DOI: 10.1016/j.phymed.2024.155512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 01/26/2024] [Accepted: 03/01/2024] [Indexed: 03/11/2024]
Abstract
BACKGROUND The overproliferation of fibroblast-like synoviocytes (FLS) contributes to synovial hyperplasia, a pivotal pathological feature of rheumatoid arthritis (RA). Shikonin (SKN), the active compound from Lithospermum erythrorhizon, exerts anti-RA effects by diverse means. However, further research is needed to confirm SKN's in vitro and in vivo anti-proliferative functions and reveal the underlying specific molecular mechanisms. PURPOSE This study revealed SKN's anti-proliferative effects by inducing both apoptosis and autophagic cell death in RA FLS and adjuvant-induced arthritis (AIA) rat synovium, with involvement of regulating the AMPK/mTOR/ULK-1 pathway. METHODS SKN's influences on RA FLS were assessed for proliferation, apoptosis, and autophagy with immunofluorescence staining (Ki67, LC3B, P62), EdU incorporation assay, staining assays of Hoechst, Annexin V-FITC/PI, and JC-1, transmission electron microscopy, mCherry-GFP-LC3B puncta assay, and western blot. In AIA rats, SKN's anti-arthritic effects were assessed, and its impacts on synovial proliferation, apoptosis, and autophagy were studied using Ki67 immunohistochemistry, TUNEL, and western blot. The involvement of AMPK/mTOR/ULK-1 pathway was examined via western blot. RESULTS SKN suppressed RA FLS proliferation with reduced cell viability and decreased Ki67-positive and EdU-positive cells. SKN promoted RA FLS apoptosis, as evidenced by apoptotic nuclear fragmentation, increased Annexin V-FITC/PI-stained cells, reduced mitochondrial potential, elevated Bax/Bcl-2 ratio, and increased cleaved-caspase 3 and cleaved-PARP protein levels. SKN also enhanced RA FLS autophagy, featuring increased LC3B, reduced P62, autophagosome formation, and activated autophagic flux. Autophagy inhibition by 3-MA attenuated SKN's anti-proliferative roles, implying that SKN-induced autophagy contributes to cell death. In vivo, SKN mitigated the severity of rat AIA while also reducing Ki67 expression, inducing apoptosis, and enhancing autophagy within AIA rat synovium. Mechanistically, SKN modulated the AMPK/mTOR/ULK-1 pathway in RA FLS and AIA rat synovium, as shown by elevated P-AMPK and P-ULK-1 expression and decreased P-mTOR expression. This regulation was supported by the reversal of SKN's in vitro and in vivo effects upon co-administration with the AMPK inhibitor compound C. CONCLUSION SKN exerted in vitro and in vivo anti-proliferative properties by inducing apoptosis and autophagic cell death via modulating the AMPK/mTOR/ULK-1 pathway. Our study revealed novel molecular mechanisms underlying SKN's anti-RA effects.
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Affiliation(s)
- Xiao-Hua Wang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Medical University, Hefei, Anhui Province 230032, PR China
| | - Chuan-Pu Shen
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Medical University, Hefei, Anhui Province 230032, PR China
| | - Tian-Tian Wang
- Department of Pathology, School of Basic Medicine, Anhui Medical University, Hefei, Anhui Province 230032, PR China
| | - Yan Huang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Medical University, Hefei, Anhui Province 230032, PR China
| | - Yuan Jin
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Medical University, Hefei, Anhui Province 230032, PR China
| | - Meng-Yuan Zhou
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Medical University, Hefei, Anhui Province 230032, PR China
| | - Man-Yu Zhang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Medical University, Hefei, Anhui Province 230032, PR China
| | - Sheng-Long Gu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Medical University, Hefei, Anhui Province 230032, PR China
| | - Meng-Qing Wang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Medical University, Hefei, Anhui Province 230032, PR China
| | - Zhi-Cheng Liu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Medical University, Hefei, Anhui Province 230032, PR China.
| | - Rong Li
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Medical University, Hefei, Anhui Province 230032, PR China; Institute of Health and Medicine, Hefei Comprehensive National Science Center, Hefei, Anhui Province 230026, PR China.
| | - Li Cai
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Medical University, Hefei, Anhui Province 230032, PR China; Department of Pathology, School of Basic Medicine, Anhui Medical University, Hefei, Anhui Province 230032, PR China.
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Wu Y, Shi W, Li H, Liu C, Shimizu K, Li R, Zhang C. Specneuzhenide improves bleomycin-induced pulmonary fibrosis in mice via AMPK-dependent reduction of PD-L1. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 128:155318. [PMID: 38493719 DOI: 10.1016/j.phymed.2023.155318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/29/2023] [Accepted: 12/25/2023] [Indexed: 03/19/2024]
Abstract
BACKGROUND Pulmonary fibrosis (PF) is an escalating global health issue, characterized by rising rates of morbidity and mortality annually. Consequently, further investigation of potential damage mechanisms and potential preventive strategies for PF are warranted. Specnuezhenide (SPN), a prominent secoiridoid compound derived from Ligustrum lucidum Ait, exhibits anti-inflammatory and anti-oxidative capacities, indicating the potential therapeutic actions on PF. However, the underlying mechanisms of SPN on PF remain unclear. PURPOSE This work was aimed at investigating the protective actions of SPN on PF and the potential mechanism. METHODS In vivo, mice were administrated with bleomycin (BLM) to establish PF model. PF mice were treated with SPN (45/90 mg/kg) by gavage. In vitro, we employed TGF-β1 (10 ng/mL)-induced MLE-12 and PLFs cells, which then were treated with SPN (5, 10, 20 µM). DARTS assay, biofilm interference experiment and molecular docking were performed to investigate the molecular target of SPN. RESULTS In vivo, we found SPN treatment improved survival rate, alleviated pathological changes through reducing BLM-induced extracellular matrix (ECM) deposition, as well as BLM-induced epithelial-mesenchymal transition (EMT). In vitro, SPN inhibited EMT and lung fibroblast transdifferentiation. Mechanistically, SPN activated the AMPK protein to decrease the abnormally high level of PD-L1. Furthermore, the compound C, known as an AMPK inhibitor, exhibited a significant hindrance to the inhibition of SPN on TGF-β1-caused fibroblast transdifferentiation and proliferation. This outcome could be attributed to the fact that compound C could eliminate the inhibitory effects of SPN on PD-L1 expression. Interestingly, DARTS assay, biofilm interference experiment and molecular docking results all indicated that SPN could bind to AMPK, which suggested that SPN might be a potential agonist targeting AMPK protein. CONCLUSION Altogether, the results in our work illustrated that SPN promoted AMPK-dependent reduction of PD-L1 protein, contributing to the inhibition of fibrosis progression. Thus, SPN may represent a potential AMPK agonist for PF treatment.
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Affiliation(s)
- Yanliang Wu
- Sino-Jan Joint Lab of Natural Health Products Research, School of Traditional Chinese Medicines, China Pharmaceutical University, Nanjing 210009, China; Department of Chinese Medicine Resources, School of Traditional Chinese Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Wen Shi
- Sino-Jan Joint Lab of Natural Health Products Research, School of Traditional Chinese Medicines, China Pharmaceutical University, Nanjing 210009, China; Department of Chinese Medicine Resources, School of Traditional Chinese Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Haini Li
- Sino-Jan Joint Lab of Natural Health Products Research, School of Traditional Chinese Medicines, China Pharmaceutical University, Nanjing 210009, China; Department of Chinese Medicine Resources, School of Traditional Chinese Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Chang Liu
- Sino-Jan Joint Lab of Natural Health Products Research, School of Traditional Chinese Medicines, China Pharmaceutical University, Nanjing 210009, China; Department of Chinese Medicine Resources, School of Traditional Chinese Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Kuniyoshi Shimizu
- Sino-Jan Joint Lab of Natural Health Products Research, School of Traditional Chinese Medicines, China Pharmaceutical University, Nanjing 210009, China; Department of Forest and Forest Products Sciences, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - Renshi Li
- Sino-Jan Joint Lab of Natural Health Products Research, School of Traditional Chinese Medicines, China Pharmaceutical University, Nanjing 210009, China; Department of Chinese Medicine Resources, School of Traditional Chinese Medicines, China Pharmaceutical University, Nanjing 210009, China.
| | - Chaofeng Zhang
- Sino-Jan Joint Lab of Natural Health Products Research, School of Traditional Chinese Medicines, China Pharmaceutical University, Nanjing 210009, China; Department of Chinese Medicine Resources, School of Traditional Chinese Medicines, China Pharmaceutical University, Nanjing 210009, China.
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9
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Yang N, Yu G, Lai Y, Zhao J, Chen Z, Chen L, Fu Y, Fang P, Gao W, Cai Y, Li Z, Xiao J, Zhou K, Ding J. A snake cathelicidin enhances transcription factor EB-mediated autophagy and alleviates ROS-induced pyroptosis after ischaemia-reperfusion injury of island skin flaps. Br J Pharmacol 2024; 181:1068-1090. [PMID: 37850255 DOI: 10.1111/bph.16268] [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: 04/17/2023] [Revised: 09/17/2023] [Accepted: 10/03/2023] [Indexed: 10/19/2023] Open
Abstract
BACKGROUND AND PURPOSE Ischaemia-reperfusion (I/R) injury is a major contributor to skin flap necrosis, which presents a challenge in achieving satisfactory therapeutic outcomes. Previous studies showed that cathelicidin-BF (BF-30) protects tissues from I/R injury. In this investigation, BF-30 was synthesized and its role and mechanism in promoting survival of I/R-injured skin flaps explored. EXPERIMENTAL APPROACH Survival rate analysis and laser Doppler blood flow analysis were used to evaluate I/R-injured flap viability. Western blotting, immunofluorescence, TdT-mediated dUTP nick end labelling (TUNEL) and dihydroethidium were utilized to examine the levels of apoptosis, pyroptosis, oxidative stress, transcription factor EB (TFEB)-mediated autophagy and molecules related to the adenosine 5'-monophosphate-activated protein kinase (AMPK)-transient receptor potential mucolipin 1 (TRPML1)-calcineurin signalling pathway. KEY RESULTS The outcomes revealed that BF-30 enhanced I/R-injured island skin flap viability. Autophagy, oxidative stress, pyroptosis and apoptosis were related to the BF-30 capability to enhance I/R-injured flap survival. Improved autophagy flux and tolerance to oxidative stress promoted the inhibition of apoptosis and pyroptosis in vascular endothelial cells. Activation of TFEB increased autophagy and inhibited endothelial cell oxidative stress in I/R-injured flaps. A reduction in TFEB level led to a loss of the protective effect of BF-30, by reducing autophagy flux and increasing the accumulation of reactive oxygen species (ROS) in endothelial cells. Additionally, BF-30 modulated TFEB activity via the AMPK-TRPML1-calcineurin signalling pathway. CONCLUSION AND IMPLICATIONS BF-30 promotes I/R-injured skin flap survival by TFEB-mediated up-regulation of autophagy and inhibition of oxidative stress, which may have possible clinical applications.
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Affiliation(s)
- Ningning Yang
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
- Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China
| | - Gaoxiang Yu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
- Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China
| | - Yingying Lai
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
- Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China
| | - Jiayi Zhao
- The Second Clinical Medical College of Wenzhou Medical University, Wenzhou, China
| | - Zhuliu Chen
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
- Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China
| | - Liang Chen
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
- Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China
| | - Yuedong Fu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
- Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China
| | - Pin Fang
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
- Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China
| | - Weiyang Gao
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
- Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China
| | - Yuepiao Cai
- The Second Clinical Medical College of Wenzhou Medical University, Wenzhou, China
| | - Zhijie Li
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
- Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China
| | - Jian Xiao
- The Second Clinical Medical College of Wenzhou Medical University, Wenzhou, China
| | - Kailiang Zhou
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
- Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China
| | - Jian Ding
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
- Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China
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10
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Shen W, Fu Y, Bai H, Zhang Z, Cao Z, Liu Z, Yang C, Sun S, Wang L, Ren C, Ling Y, Zhang Z, Cao H. Antioxidant activity and metabolic regulation of sodium salicylate on goat sperm at low temperature. Anim Biosci 2024; 37:640-654. [PMID: 38271968 PMCID: PMC10915220 DOI: 10.5713/ab.23.0329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/22/2023] [Accepted: 11/28/2023] [Indexed: 01/27/2024] Open
Abstract
OBJECTIVE The purpose of this study was to explore the effect of sodium salicylate (SS) on semen preservation and metabolic regulation in goats. METHODS Under the condition of low temperature, SS was added to goat semen diluent to detect goat sperm motility, plasma membrane, acrosome, antioxidant capacity, mitochondrial membrane potential (MMP) and metabonomics. RESULTS The results show that at the 8th day of low-temperature storage, the sperm motility of the 20 μM SS group was 66.64%, and the integrity rates of the plasma membrane and acrosome were both above 60%, significantly higher than those of the other groups. The activities of catalase and superoxide dismutase in the sperm of the 20 μM SS group were significantly higher than those of the control group, the contents of reactive oxygen species and malondialdehyde were significantly lower than those in the control group, the MMP was significantly higher than that in the control group, and the contents of Ca2+ and total cholesterol were significantly higher than those in the control group. Through metabonomics analysis, there were significant metabolic differences between the control group and the 20 μM SS group. Twenty of the most significant metabolic markers were screened, mainly involving five metabolic pathways, of which nicotinic acid and nicotinamide metabolic pathways were the most significant. CONCLUSION The results indicate that SS can effectively improve the low-temperature preservation quality of goat sperm.
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Affiliation(s)
- Wenzheng Shen
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036,
China
| | - Yu Fu
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036,
China
| | - Haiyu Bai
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036,
China
| | - Zhiyu Zhang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036,
China
| | - Zhikun Cao
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036,
China
| | - Zibo Liu
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036,
China
| | - Chao Yang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036,
China
| | - Shixin Sun
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036,
China
| | - Lei Wang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036,
China
| | - Chunhuan Ren
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036,
China
- Anhui Province Key Laboratory of Local Livestock and Poultry Genetic Resource Conservation and Bio-breeding, Anhui Agricultural University, Hefei, 230036,
China
| | - Yinghui Ling
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036,
China
- Anhui Province Key Laboratory of Local Livestock and Poultry Genetic Resource Conservation and Bio-breeding, Anhui Agricultural University, Hefei, 230036,
China
| | - Zijun Zhang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036,
China
- Anhui Province Key Laboratory of Local Livestock and Poultry Genetic Resource Conservation and Bio-breeding, Anhui Agricultural University, Hefei, 230036,
China
| | - Hongguo Cao
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036,
China
- Anhui Province Key Laboratory of Local Livestock and Poultry Genetic Resource Conservation and Bio-breeding, Anhui Agricultural University, Hefei, 230036,
China
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11
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Ghandour F, Kassem S, Simanovich E, Rahat MA. Glucose Promotes EMMPRIN/CD147 and the Secretion of Pro-Angiogenic Factors in a Co-Culture System of Endothelial Cells and Monocytes. Biomedicines 2024; 12:706. [PMID: 38672062 PMCID: PMC11047830 DOI: 10.3390/biomedicines12040706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 03/17/2024] [Accepted: 03/20/2024] [Indexed: 04/28/2024] Open
Abstract
Vascular complications in Type 2 diabetes mellitus (T2DM) patients increase morbidity and mortality. In T2DM, angiogenesis is impaired and can be enhanced or reduced in different tissues ("angiogenic paradox"). The present study aimed to delineate differences between macrovascular and microvascular endothelial cells that might explain this paradox. In a monoculture system of human macrovascular (EaHy926) or microvascular (HMEC-1) endothelial cell lines and a monocytic cell line (U937), high glucose concentrations (25 mmole/L) increased the secretion of the pro-angiogenic factors CD147/EMMPRIN, VEGF, and MMP-9 from both endothelial cells, but not from monocytes. Co-cultures of EaHy926/HMEC-1 with U937 enhanced EMMPRIN and MMP-9 secretion, even in low glucose concentrations (5.5 mmole/L), while in high glucose HMEC-1 co-cultures enhanced all three factors. EMMPRIN mediated these effects, as the addition of anti-EMMPRIN antibody decreased VEGF and MMP-9 secretion, and inhibited the angiogenic potential assessed through the wound assay. Thus, the minor differences between the macrovascular and microvascular endothelial cells cannot explain the angiogenic paradox. Metformin, a widely used drug for the treatment of T2DM, inhibited EMMPRIN, VEGF, and MMP-9 secretion in high glucose concentration, and the AMPK inhibitor dorsomorphin enhanced it. Thus, AMPK regulates EMMPRIN, a key factor in diabetic angiogenesis, suggesting that targeting EMMPRIN may help in the treatment of diabetic vascular complications.
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Affiliation(s)
- Fransis Ghandour
- Department of Internal Medicine A, Carmel Medical Center, Haifa 3436212, Israel
| | - Sameer Kassem
- Department of Internal Medicine A, Carmel Medical Center, Haifa 3436212, Israel
- The Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 3109601, Israel
| | - Elina Simanovich
- Immunotherapy Laboratory, Carmel Medical Center, Haifa 3436212, Israel
| | - Michal A. Rahat
- The Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 3109601, Israel
- Immunotherapy Laboratory, Carmel Medical Center, Haifa 3436212, Israel
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12
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Ablooglu AJ, Chen WS, Xie Z, Desai A, Paul S, Lack JB, Scott LA, Eisch AR, Dudek AZ, Parikh SM, Druey KM. Intrinsic endothelial hyperresponsiveness to inflammatory mediators drives acute episodes in models of Clarkson disease. J Clin Invest 2024; 134:e169137. [PMID: 38502192 DOI: 10.1172/jci169137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 03/08/2024] [Indexed: 03/21/2024] Open
Abstract
Clarkson disease, or monoclonal gammopathy-associated idiopathic systemic capillary leak syndrome (ISCLS), is a rare, relapsing-remitting disorder featuring the abrupt extravasation of fluids and proteins into peripheral tissues, which in turn leads to hypotensive shock, severe hemoconcentration, and hypoalbuminemia. The specific leakage factor(s) and pathways in ISCLS are unknown, and there is no effective treatment for acute flares. Here, we characterize an autonomous vascular endothelial defect in ISCLS that was recapitulated in patient-derived endothelial cells (ECs) in culture and in a mouse model of disease. ISCLS-derived ECs were functionally hyperresponsive to permeability-inducing factors like VEGF and histamine, in part due to increased endothelial nitric oxide synthase (eNOS) activity. eNOS blockade by administration of N(γ)-nitro-l-arginine methyl ester (l-NAME) ameliorated vascular leakage in an SJL/J mouse model of ISCLS induced by histamine or VEGF challenge. eNOS mislocalization and decreased protein phosphatase 2A (PP2A) expression may contribute to eNOS hyperactivation in ISCLS-derived ECs. Our findings provide mechanistic insights into microvascular barrier dysfunction in ISCLS and highlight a potential therapeutic approach.
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Affiliation(s)
- Ararat J Ablooglu
- Lung and Vascular Inflammation Section, Laboratory of Allergic Diseases, and
| | - Wei-Sheng Chen
- Lung and Vascular Inflammation Section, Laboratory of Allergic Diseases, and
| | - Zhihui Xie
- Lung and Vascular Inflammation Section, Laboratory of Allergic Diseases, and
| | - Abhishek Desai
- Lung and Vascular Inflammation Section, Laboratory of Allergic Diseases, and
| | - Subrata Paul
- Integrative Data Sciences Section, National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, Maryland, USA
| | - Justin B Lack
- Integrative Data Sciences Section, National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, Maryland, USA
| | - Linda A Scott
- Lung and Vascular Inflammation Section, Laboratory of Allergic Diseases, and
| | - A Robin Eisch
- Lung and Vascular Inflammation Section, Laboratory of Allergic Diseases, and
| | - Arkadiusz Z Dudek
- Division of Medical Oncology, Mayo Clinic, Rochester, Minnesota, USA
| | - Samir M Parikh
- Division of Nephrology, Departments of Internal Medicine and Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Kirk M Druey
- Lung and Vascular Inflammation Section, Laboratory of Allergic Diseases, and
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13
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Hees JT, Wanderoy S, Lindner J, Helms M, Murali Mahadevan H, Harbauer AB. Insulin signalling regulates Pink1 mRNA localization via modulation of AMPK activity to support PINK1 function in neurons. Nat Metab 2024; 6:514-530. [PMID: 38504131 PMCID: PMC10963278 DOI: 10.1038/s42255-024-01007-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 02/06/2024] [Indexed: 03/21/2024]
Abstract
Mitochondrial quality control failure is frequently observed in neurodegenerative diseases. The detection of damaged mitochondria by stabilization of PTEN-induced kinase 1 (PINK1) requires transport of Pink1 messenger RNA (mRNA) by tethering it to the mitochondrial surface. Here, we report that inhibition of AMP-activated protein kinase (AMPK) by activation of the insulin signalling cascade prevents Pink1 mRNA binding to mitochondria. Mechanistically, AMPK phosphorylates the RNA anchor complex subunit SYNJ2BP within its PDZ domain, a phosphorylation site that is necessary for its interaction with the RNA-binding protein SYNJ2. Notably, loss of mitochondrial Pink1 mRNA association upon insulin addition is required for PINK1 protein activation and its function as a ubiquitin kinase in the mitophagy pathway, thus placing PINK1 function under metabolic control. Induction of insulin resistance in vitro by the key genetic Alzheimer risk factor apolipoprotein E4 retains Pink1 mRNA at the mitochondria and prevents proper PINK1 activity, especially in neurites. Our results thus identify a metabolic switch controlling Pink1 mRNA localization and PINK1 activity via insulin and AMPK signalling in neurons and propose a mechanistic connection between insulin resistance and mitochondrial dysfunction.
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Affiliation(s)
- J Tabitha Hees
- TUM Medical Graduate Center, Technical University of Munich, Munich, Germany
- Max Planck Institute for Biological Intelligence, Martinsried, Germany
| | - Simone Wanderoy
- TUM Medical Graduate Center, Technical University of Munich, Munich, Germany
- Max Planck Institute for Biological Intelligence, Martinsried, Germany
| | - Jana Lindner
- Max Planck Institute for Biological Intelligence, Martinsried, Germany
| | - Marlena Helms
- Max Planck Institute for Biological Intelligence, Martinsried, Germany
| | - Hariharan Murali Mahadevan
- TUM Medical Graduate Center, Technical University of Munich, Munich, Germany
- Max Planck Institute for Biological Intelligence, Martinsried, Germany
| | - Angelika B Harbauer
- Max Planck Institute for Biological Intelligence, Martinsried, Germany.
- Technical University of Munich, Institute of Neuronal Cell Biology, Munich, Germany.
- Munich Cluster for Systems Neurology, Munich, Germany.
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14
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Choudhury D, Rong N, Senthil Kumar HV, Swedick S, Samuel RZ, Mehrotra P, Toftegaard J, Rajabian N, Thiyagarajan R, Podder AK, Wu Y, Shahini S, Seldeen KL, Troen B, Lei P, Andreadis ST. Proline restores mitochondrial function and reverses aging hallmarks in senescent cells. Cell Rep 2024; 43:113738. [PMID: 38354087 DOI: 10.1016/j.celrep.2024.113738] [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: 06/12/2023] [Revised: 12/04/2023] [Accepted: 01/19/2024] [Indexed: 02/16/2024] Open
Abstract
Mitochondrial dysfunction is a hallmark of cellular senescence, with the loss of mitochondrial function identified as a potential causal factor contributing to senescence-associated decline in cellular functions. Our recent findings revealed that ectopic expression of the pluripotency transcription factor NANOG rejuvenates dysfunctional mitochondria of senescent cells by rewiring metabolic pathways. In this study, we report that NANOG restores the expression of key enzymes, PYCR1 and PYCR2, in the proline biosynthesis pathway. Additionally, senescent mesenchymal stem cells manifest severe mitochondrial respiratory impairment, which is alleviated through proline supplementation. Proline induces mitophagy by activating AMP-activated protein kinase α and upregulating Parkin expression, enhancing mitochondrial clearance and ultimately restoring cell metabolism. Notably, proline treatment also mitigates several aging hallmarks, including DNA damage, senescence-associated β-galactosidase, inflammatory cytokine expressions, and impaired myogenic differentiation capacity. Overall, this study highlights the role of proline in mitophagy and its potential in reversing senescence-associated mitochondrial dysfunction and aging hallmarks.
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Affiliation(s)
- Debanik Choudhury
- Department of Chemical and Biological Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | - Na Rong
- Department of Chemical and Biological Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | | | - Sydney Swedick
- Department of Biomedical Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | - Ronel Z Samuel
- Department of Chemical and Biological Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | - Pihu Mehrotra
- Department of Chemical and Biological Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | - John Toftegaard
- Department of Biomedical Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | - Nika Rajabian
- Department of Chemical and Biological Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | - Ramkumar Thiyagarajan
- Department of Medicine, Division of Geriatrics and Palliative Medicine, Buffalo, NY 14203, USA
| | - Ashis K Podder
- Department of Chemical and Biological Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | - Yulun Wu
- Department of Chemical and Biological Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | - Shahryar Shahini
- Department of Chemical and Biological Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | - Kenneth L Seldeen
- Department of Medicine, Division of Geriatrics and Palliative Medicine, Buffalo, NY 14203, USA
| | - Bruce Troen
- Department of Medicine, Division of Geriatrics and Palliative Medicine, Buffalo, NY 14203, USA
| | - Pedro Lei
- Department of Chemical and Biological Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | - Stelios T Andreadis
- Department of Chemical and Biological Engineering, University at Buffalo, Buffalo, NY 14260, USA; Department of Biomedical Engineering, University at Buffalo, Buffalo, NY 14260, USA; Center of Excellence in Bioinformatics and Life Sciences, University at Buffalo, Buffalo, NY 14263, USA; Center for Cell, Gene and Tissue Engineering (CGTE), University at Buffalo, Buffalo, NY 14260, USA.
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15
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Zhu W, Yang G, Chen N, Zhang W, Gao Q, Li T, Yuan N, Jin H. CTRP13 alleviates palmitic acid-induced inflammation, oxidative stress, apoptosis and endothelial cell dysfunction in HUVECs. Tissue Cell 2024; 86:102232. [PMID: 37976900 DOI: 10.1016/j.tice.2023.102232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 09/26/2023] [Accepted: 10/04/2023] [Indexed: 11/19/2023]
Abstract
C1q/tumor necrosis factor-related protein 13 (CTRP13) has been reported to participate in cardiovascular diseases. However, the role and molecular mechanism of CTRP13 in obesity-induced endothelial cell damage is still unclear. In palmitic acid (PA)-induced human umbilical vein endothelial cells (HUVECs), qRT-PCR and western blot were used to examine CTRP13 expression. CCK-8 and TUNEL assays were adopted to assess cell viability and apoptosis, respectively. ROS level and MDA content were evaluated by their commercial kits and inflammatory cytokines were measured using ELISA. Endothelial cell dysfunction was evaluated by detecting NO production and eNOS expression, and tube formation assay was performed to assess angiogenesis. AMPK pathway-related proteins were detected by western blot. The results showed that CTRP13 was downregulated in PA-induced HUVECs. CTRP13 overexpression reduced PA-induced cell viability loss and oxidative stress in HUVECs. Moreover, CTRP13 overexpression suppressed PA-induced inflammation and apoptosis, improved angiogenesis ability, and alleviated endothelial cell dysfunction in HUVECs. In addition, CTRP13 overexpression activated AMPK pathway and regulated the expressions of downstream NOX1/p38 and KLF2. Furthermore, compound C countervailed the impacts of CTRP13 overexpression on cell viability, oxidative stress, inflammation, apoptosis and endothelial function in PA-induced HUVECs. To sum up, CTRP13 overexpression may alleviate PA-induced endothelial cell damage.
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Affiliation(s)
- Wei Zhu
- Department of Edocrine and Metabolism, Affiliated Hospital of Shaoxing University, Shaoxing 312000, China.
| | - Guojun Yang
- Department of Edocrine and Metabolism, Affiliated Hospital of Shaoxing University, Shaoxing 312000, China
| | - Naijun Chen
- Department of Edocrine and Metabolism, Affiliated Hospital of Shaoxing University, Shaoxing 312000, China
| | - Wenjun Zhang
- Department of Edocrine and Metabolism, Affiliated Hospital of Shaoxing University, Shaoxing 312000, China
| | - Qian Gao
- Department of Edocrine and Metabolism, Affiliated Hospital of Shaoxing University, Shaoxing 312000, China
| | - Tingting Li
- Department of Edocrine and Metabolism, Affiliated Hospital of Shaoxing University, Shaoxing 312000, China
| | - Nan Yuan
- Department of Edocrine and Metabolism, Affiliated Hospital of Shaoxing University, Shaoxing 312000, China
| | - Huawei Jin
- Department of Edocrine and Metabolism, Affiliated Hospital of Shaoxing University, Shaoxing 312000, China
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16
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Wang Z, Wang M, Lin M, Wei P. The immunomodulatory effects of metformin in LPS-induced macrophages: an in vitro study. Inflamm Res 2024; 73:175-181. [PMID: 38091014 DOI: 10.1007/s00011-023-01827-8] [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: 07/28/2023] [Revised: 11/17/2023] [Accepted: 11/23/2023] [Indexed: 01/31/2024] Open
Abstract
OBJECTIVE The study aimed to explore the immunomodulatory effects of clinically relevant concentrations of metformin on macrophages during sepsis, which is characterized by an initial hyperinflammatory phase followed by a period of immunosuppression. METHODS: We employed the RAW 264.7 mouse macrophage cell line as an in vitro model to induce inflammatory responses and immune suppression through primary and secondary stimulation by lipopolysaccharide (LPS). The cells were exposed to clinically relevant concentrations of metformin, and their responses were gauged through cytotoxicity assays, enzyme-linked immunosorbent assay for cytokine quantification, and assessments of intracellular reactive oxygen species (ROS) production. Moreover, to probe the role of AMPK in mediating the effects of metformin, we conducted an AMP-activated protein kinase (AMPK) activity assay and knocked down AMPK using siRNA. RESULTS: Our study revealed that clinically relevant concentrations of metformin considerably decreased the LPS-induced secretion of tumor necrosis factor-α and interleukin-6, which indicates the suppression of the initial hyperinflammatory response. Furthermore, metformin prevented LPS-induced immunosuppression. Notably, these immunomodulatory effects of metformin were not mediated by the activation of the AMPK pathway, as evidenced by the unaltered AMPK activity and siRNA experiments. The modulation of intracellular ROS levels emerged as the critical mechanism underlying the inhibition of hyperinflammation and impediment of immunosuppression by metformin. CONCLUSION A certain therapeutic dose of metformin inhibited hyperinflammatory responses and alleviated immunosuppression in LPS-induced macrophages through the bidirectional modulation of intracellular ROS generation.
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Affiliation(s)
- Zhiyong Wang
- Department of Immunology, Zhuhai Campus of Zunyi Medical University, Zhuhai, China
| | - Min Wang
- Department of Pharmaceutics, Zhuhai Campus of Zunyi Medical University, Zhuhai, China
| | - Mao Lin
- Department of Physiology, Zhuhai Campus of Zunyi Medical University, Zhuhai, China
| | - Pei Wei
- Department of Immunology, Zhuhai Campus of Zunyi Medical University, Zhuhai, China.
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17
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Lee TJ, Sasaki Y, Ruzycki PA, Ban N, Lin JB, Wu HT, Santeford A, Apte RS. Catalytic isoforms of AMP-activated protein kinase differentially regulate IMPDH activity and photoreceptor neuron function. JCI Insight 2024; 9:e173707. [PMID: 38227383 PMCID: PMC11143937 DOI: 10.1172/jci.insight.173707] [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: 07/10/2023] [Accepted: 01/10/2024] [Indexed: 01/17/2024] Open
Abstract
AMP-activated protein kinase (AMPK) plays a crucial role in maintaining ATP homeostasis in photoreceptor neurons. AMPK is a heterotrimeric protein consisting of α, β, and γ subunits. The independent functions of the 2 isoforms of the catalytic α subunit, PRKAA1 and PRKAA2, are uncharacterized in specialized neurons, such as photoreceptors. Here, we demonstrate in mice that rod photoreceptors lacking PRKAA2, but not PRKAA1, showed altered levels of cGMP, GTP, and ATP, suggesting isoform-specific regulation of photoreceptor metabolism. Furthermore, PRKAA2-deficient mice displayed visual functional deficits on electroretinography and photoreceptor outer segment structural abnormalities on transmission electron microscopy consistent with neuronal dysfunction, but not neurodegeneration. Phosphoproteomics identified inosine monophosphate dehydrogenase (IMPDH) as a molecular driver of PRKAA2-specific photoreceptor dysfunction, and inhibition of IMPDH improved visual function in Prkaa2 rod photoreceptor-knockout mice. These findings highlight a therapeutically targetable PRKAA2 isoform-specific function of AMPK in regulating photoreceptor metabolism and function through a potentially previously uncharacterized mechanism affecting IMPDH activity.
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Affiliation(s)
- Tae Jun Lee
- John F. Hardesty, MD Department of Ophthalmology and Visual Sciences
- Department of Developmental Biology; and
| | - Yo Sasaki
- Department of Genetics, Washington University in St. Louis School of Medicine, St. Louis, Missouri, USA
| | - Philip A. Ruzycki
- John F. Hardesty, MD Department of Ophthalmology and Visual Sciences
- Department of Genetics, Washington University in St. Louis School of Medicine, St. Louis, Missouri, USA
| | - Norimitsu Ban
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Joseph B. Lin
- John F. Hardesty, MD Department of Ophthalmology and Visual Sciences
| | | | - Andrea Santeford
- John F. Hardesty, MD Department of Ophthalmology and Visual Sciences
| | - Rajendra S. Apte
- John F. Hardesty, MD Department of Ophthalmology and Visual Sciences
- Department of Developmental Biology; and
- Department of Medicine, Washington University in St. Louis School of Medicine, St. Louis, Missouri, USA
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18
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Bai H, Zhang Z, Shen W, Fu Y, Cao Z, Liu Z, Yang C, Sun S, Wang L, Ling Y, Zhang Z, Cao H. Metabolomics Analysis of Sodium Salicylate Improving the Preservation Quality of Ram Sperm. Molecules 2023; 29:188. [PMID: 38202772 PMCID: PMC10780297 DOI: 10.3390/molecules29010188] [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: 12/05/2023] [Revised: 12/22/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024] Open
Abstract
The aim of this study was to investigate the effects of sodium salicylate (SS) on the preservation and metabolic regulation of sheep sperm. Under 4 °C low-temperature conditions, SS (at 10 µM, 20 µM, 30 µM, and 50 µM) was added to the semen diluent to detect sperm motility, plasma membrane, and acrosome integrity. Based on the selected optimal concentration of SS (20 µM), the effects of 20 µM of SS on sperms' antioxidant capacity and mitochondrial membrane potential (MMP) were evaluated, and metabolomics analysis was conducted. The results showed that on the 20th day of low-temperature storage, the sperm motility of the 20 µM SS group was 62.80%, and the activities of catalase (CAT) and superoxide dismutase (SOD) were significantly higher than those of the control group (p < 0.01). The content of Ca2+, reactive oxygen species (ROS), and malondialdehyde (MDA) were significantly lower than those of the control group (p < 0.01), and the total antioxidant capacity (T-AOC) was significantly higher than that of the control group (p < 0.05); mitochondrial activity and the total cholesterol (TC) content were significantly higher than those in the control group (p < 0.01). An ultrastructural examination showed that in the SS group, the sperm plasma membrane and acrosome were intact, the fibrous sheath and axoneme morphology of the outer dense fibers were normal, and the mitochondria were arranged neatly. In the control group, there was significant swelling of the sperm plasma membrane, rupture of the acrosome, and vacuolization of mitochondria. Using metabolomics analysis, 20 of the most significant differential metabolic markers were screened, mainly involving 6 metabolic pathways, with the amino acid biosynthesis pathway being the most abundant. In summary, 20 µM of SS significantly improved the preservation quality of sheep sperm under low-temperature conditions of 4 °C.
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Affiliation(s)
- Haiyu Bai
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Zhiyu Zhang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Wenzheng Shen
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Yu Fu
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Zhikun Cao
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Zibo Liu
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Chao Yang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Shixin Sun
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Lei Wang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Yinghui Ling
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
- Anhui Province Key Laboratory of Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, Anhui Agricultural University, Hefei 230036, China
| | - Zijun Zhang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
- Anhui Province Key Laboratory of Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, Anhui Agricultural University, Hefei 230036, China
| | - Hongguo Cao
- College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
- Anhui Province Key Laboratory of Local Livestock and Poultry Genetic Resource Conservation and Bio-Breeding, Anhui Agricultural University, Hefei 230036, China
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19
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Jang M, Park R, Yamamoto A, Park YI, Park Y, Lee S, Park J. AMPK inhibitor, compound C, inhibits coronavirus replication in vitro. PLoS One 2023; 18:e0292309. [PMID: 37788269 PMCID: PMC10547180 DOI: 10.1371/journal.pone.0292309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 09/18/2023] [Indexed: 10/05/2023] Open
Abstract
The coronavirus disease (COVID-19) pandemic has resulted in more than six million deaths by October 2022. Vaccines and antivirals for severe acute respiratory syndrome coronavirus 2 are now available; however, more effective antiviral drugs are required for effective treatment. Here, we report that a potent AMP-activated protein kinase (AMPK) inhibitor, compound C/dorsomorphin, inhibits the replication of the human coronavirus OC43 strain (HCoV-OC43). We examined HCoV-OC43 replication in control and AMPK-knockout (KO) cells and found that the virus replication decreased in AMPK-KO cells. Next, we examined the effect of the AMPK inhibitor, compound C on coronavirus replication. Compound C treatment efficiently inhibited the replication and decreased the coronavirus-induced cytotoxicity, further inhibiting autophagy. In addition, treatment with compound C in combination with chloroquine synergistically inhibited coronavirus replication. These results suggest that compound C can be considered as a potential drug candidate for COVID-19.
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Affiliation(s)
- Minsu Jang
- Division of Biological Science and Technology, Yonsei University, Wonju, Republic of Korea
| | - Rackhyun Park
- Department of Life Science, Yong-In University, Yongin, Republic of Korea
| | - Ayane Yamamoto
- Division of Biological Science and Technology, Yonsei University, Wonju, Republic of Korea
| | - Yea-In Park
- Division of Biological Science and Technology, Yonsei University, Wonju, Republic of Korea
| | - Yeonjeong Park
- Division of Biological Science and Technology, Yonsei University, Wonju, Republic of Korea
| | - Siyun Lee
- Division of Biological Science and Technology, Yonsei University, Wonju, Republic of Korea
| | - Junsoo Park
- Division of Biological Science and Technology, Yonsei University, Wonju, Republic of Korea
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20
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Zhang B, Xu Y, Liu J, Wu C, Zhao X, Zhou L, Xie Y. Oral Intake of Inosine 5'-Monophosphate in Mice Promotes the Absorption of Exogenous Fatty Acids and Their Conversion into Triglycerides though Enhancing the Phosphorylation of Adenosine 5'-Monophosphate-Activated Protein Kinase in the Liver, Leading to Lipohyperplasia. Int J Mol Sci 2023; 24:14588. [PMID: 37834038 PMCID: PMC10572334 DOI: 10.3390/ijms241914588] [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: 08/18/2023] [Revised: 09/09/2023] [Accepted: 09/10/2023] [Indexed: 10/15/2023] Open
Abstract
Inosine 5'-monophoaphate (IMP) is a food additive that promotes serious lipohyperplasia in the liver of C57/KsJ-db/db (db/db) mice. Thus, IMP taken orally by healthy mice might also damage their health. To date, how IMP affects health after being taken by healthy animals is still unclear. Therefore, we investigated the health of C57BL/6J mice affected by IMP intake. Our data revealed that C57BL/6J mice administered 255 μM IMP daily via oral gavage for 4 months caused hyperlipidemia and an increase in body fat rate. The expressions of acetyl-CoA carboxylase 1 (ACC1) and phosphorylated acetyl-CoA carboxylase 2 (ACC2) in hepatocytes increased though the administration of IMP, promoting the phosphorylation of adenosine 5'-monophosphate-activated protein kinase (AMPK). The conversion of acetyl-CoA into triglycerides (TGs) was promoted by ACC1. These TGs were transported from the hepatocytes to avoid the development of non-alcoholic fatty liver disease (NAFLD), causing a deficiency of acetyl-CoA in the liver, and then, the increased phosphorylated ACC2 promoted the cytoplasm fatty acids entering the mitochondria and conversion into acetyl-CoA through the fatty acid β-oxidation pathway, causing a deficiency in fatty acids. Therefore, the liver showed enhanced absorption of exogenous fatty acids, which were converted into TGs, causing lipohyperplasia. In conclusion, an excessive IMP intake promotes metabolic dysfunction in adipose tissue.
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Affiliation(s)
| | | | | | | | | | | | - Yong Xie
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science & Peking Union Medical College, Malianwa North Road No. 151, Haidian District, Beijing 100193, China; (B.Z.); (Y.X.); (J.L.); (C.W.); (X.Z.); (L.Z.)
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21
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Lee YC, Chiou JT, Chang LS. AMPK inhibition induces MCL1 mRNA destabilization via the p38 MAPK/miR-22/HuR axis in chronic myeloid leukemia cells. Biochem Pharmacol 2023; 209:115442. [PMID: 36720359 DOI: 10.1016/j.bcp.2023.115442] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/15/2023] [Accepted: 01/25/2023] [Indexed: 01/31/2023]
Abstract
The oncogenic and tumor-suppressive roles of AMPK in chronic myeloid leukemia (CML) are controvertible. This study aimed to investigate the cytotoxic effects of the AMPK inhibitor Compound C in the CML cell lines K562, KU812, and MEG-01. Compared to K562 cells, KU812 and MEG-01 cells were more sensitive to Compound C-mediated cytotoxicity. Moreover, Compound C induced SIRT3 upregulation in K562 cells but not in KU812 or MEG-01 cells. SIRT3 silencing increased the sensitivity of K562 cells to Compound C. Additionally; Compound C-induced autophagy attenuated its induced apoptosis in KU812 and MEG-01 cells. Compound C-induced ROS-mediated AMPKα inactivation resulted in the downregulation of apoptotic regulator MCL1 in KU812 and MEG-01 cells. Mechanistically, AMPK inhibition activated p38 MAPK-mediated miR-22 expression, which in turn inhibited HuR expression, thereby reducing MCL1 mRNA stability. Overexpression of constitutively active AMPKα1 and abolishment of the activation of p38 MAPK inhibited Compound C-induced cell death and MCL1 downregulation. Furthermore, Compound C synergistically enhanced the cytotoxicity of BCR-ABL inhibitors and the BCL2 inhibitor ABT-199. Collectively, this study indicates that Compound C induces MCL1 downregulation through the AMPK/p38 MAPK/miR-22/HuR pathway, thereby inducing apoptosis of KU812 and MEG-01 cells. Furthermore, our findings suggest that AMPK inhibition is a promising strategy for improving CML therapy.
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Affiliation(s)
- Yuan-Chin Lee
- Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
| | - Jing-Ting Chiou
- Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
| | - Long-Sen Chang
- Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung 804, Taiwan; Department of Biotechnology, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
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22
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Tian H, Zheng X, Wang H. Isorhapontigenin ameliorates high glucose-induced podocyte and vascular endothelial cell injuries via mitigating oxidative stress and autophagy through the AMPK/Nrf2 pathway. Int Urol Nephrol 2023; 55:423-436. [PMID: 35960477 DOI: 10.1007/s11255-022-03325-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 07/25/2022] [Indexed: 01/25/2023]
Abstract
BACKGROUND Diabetic nephropathy (DN) is a severe microvascular complication of diabetes mellitus and a primary reason for end-stage renal disease (ESRD). Isorhapontigenin (ISO), a natural derivative of stilbene, has significant anti-inflammatory and antioxidant effects. Nevertheless, its impact on DN remains elusive. METHODS Human vascular endothelial cells (HUVECs) and podocytes were damaged by high glucose (HG). Cell viability and apoptosis were testified by the cell counting kit-8 (CCK-8) assay and flow cytometry, respectively. The mRNA profiles of antioxidant factors HO-1, NQO1, and Prx1 were monitored by real-time quantitative polymerase chain reaction (RT-qPCR). Western blotting (WB) was implemented to verify the expression of apoptosis-related proteins (Bax, Bad, and Bcl-XL), antioxidant factors (HO-1, NQO1, and Prx1), autophagy-related proteins (Beclin-1, ATG5, p62), podocalyxin (podocin, nephrin, and synaptopodin) and the AMPK/Nrf2 pathway. The levels of oxidative stress-related markers MDA, SOD and CAT were assessed with the corresponding kits. Compound C (CC), an inhibitor of AMPK, was deployed to probe the effects of modulating the AMPK/Nrf2 pathway on ISO in oxidative stress and autophagy in HUVECs and podocytes. Streptozotocin (STZ) was injected intraperitoneally into mice to establish an animal model of diabetes mellitus and to clarify the impact of ISO on the renal parameters such as serum creatinine, urea nitrogen and urinary protein in diabetic mice. RESULTS ISO notably facilitated cell proliferation, impeded apoptosis, elevated the expression of antioxidant-related factors, alleviated HG-induced oxidative stress and activated autophagy in HUVECs and podocytes. ISO activated the AMPK/Nrf2 pathway. Attenuating AMPK diminished the protective effect of ISO on HUVECs and podocytes, curbed cell proliferation, intensified apoptosis and oxidative stress, and dampened autophagy. In-vivo experiments also displayed that ISO reduced histopathological damage, lowered serum creatinine, urea nitrogen and urinary ACR levels, and eased kidney damage in DN mice. CONCLUSION ISO attenuates HG-induced oxidative stress and activates autophagy by motivating the AMPK/Nrf2 pathway, exerting a protective effect on HUVECs and podocytes and reducing renal injury in DN mice.
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Affiliation(s)
- Hao Tian
- Department of Thoracic Vascular Surgery, Beijing Daxing District People's Hospital, No. 26 Huangcun West Street, Daxing District, Beijing, 102600, China.
| | - Xiang Zheng
- Department of Thoracic Vascular Surgery, Beijing Daxing District People's Hospital, No. 26 Huangcun West Street, Daxing District, Beijing, 102600, China
| | - Hui Wang
- Department of Thoracic Vascular Surgery, Beijing Daxing District People's Hospital, No. 26 Huangcun West Street, Daxing District, Beijing, 102600, China
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23
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Eyme KM, Sammarco A, Jha R, Mnatsakanyan H, Pechdimaljian C, Carvalho L, Neustadt R, Moses C, Alnasser A, Tardiff DF, Su B, Williams KJ, Bensinger SJ, Chung CY, Badr CE. Targeting de novo lipid synthesis induces lipotoxicity and impairs DNA damage repair in glioblastoma mouse models. Sci Transl Med 2023; 15:eabq6288. [PMID: 36652537 PMCID: PMC9942236 DOI: 10.1126/scitranslmed.abq6288] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Deregulated de novo lipid synthesis (DNLS) is a potential druggable vulnerability in glioblastoma (GBM), a highly lethal and incurable cancer. Yet the molecular mechanisms that determine susceptibility to DNLS-targeted therapies remain unknown, and the lack of brain-penetrant inhibitors of DNLS has prevented their clinical evaluation as GBM therapeutics. Here, we report that YTX-7739, a clinical-stage inhibitor of stearoyl CoA desaturase (SCD), triggers lipotoxicity in patient-derived GBM stem-like cells (GSCs) and inhibits fatty acid desaturation in GSCs orthotopically implanted in mice. When administered as a single agent, or in combination with temozolomide (TMZ), YTX-7739 showed therapeutic efficacy in orthotopic GSC mouse models owing to its lipotoxicity and ability to impair DNA damage repair. Leveraging genetic, pharmacological, and physiological manipulation of key signaling nodes in gliomagenesis complemented with shotgun lipidomics, we show that aberrant MEK/ERK signaling and its repression of the energy sensor AMP-activated protein kinase (AMPK) primarily drive therapeutic vulnerability to SCD and other DNLS inhibitors. Conversely, AMPK activation mitigates lipotoxicity and renders GSCs resistant to the loss of DNLS, both in culture and in vivo, by decreasing the saturation state of phospholipids and diverting toxic lipids into lipid droplets. Together, our findings reveal mechanisms of metabolic plasticity in GSCs and provide a framework for the rational integration of DNLS-targeted GBM therapies.
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Affiliation(s)
- Katharina M. Eyme
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA 02129,Department of Neurology, Heidelberg University Hospital, Heidelberg, Germany
| | - Alessandro Sammarco
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA 02129,Department of Comparative Biomedicine and Food Science, University of Padua, Padua, Italy,Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, CA, USA 90095
| | - Roshani Jha
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA 02129
| | - Hayk Mnatsakanyan
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA 02129
| | - Caline Pechdimaljian
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA 02129
| | - Litia Carvalho
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA 02129,Neuroscience Program, Harvard Medical School, Boston, MA, USA 02115
| | - Rudolph Neustadt
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA 02129
| | - Charlotte Moses
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA 02129
| | - Ahmad Alnasser
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA 02129
| | | | - Baolong Su
- Department of Biological Chemistry, University of California, Los Angeles, CA, USA 90095,UCLA Lipidomics Laboratory, University of California, Los Angeles, CA, USA 90095
| | - Kevin J. Williams
- Department of Biological Chemistry, University of California, Los Angeles, CA, USA 90095,UCLA Lipidomics Laboratory, University of California, Los Angeles, CA, USA 90095
| | - Steven J. Bensinger
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, CA, USA 90095,UCLA Lipidomics Laboratory, University of California, Los Angeles, CA, USA 90095
| | | | - Christian E. Badr
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA 02129,Neuroscience Program, Harvard Medical School, Boston, MA, USA 02115,Correspondence:
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24
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Novel role of AMPK in cocaine reinforcement via regulating CRTC1. Transl Psychiatry 2022; 12:530. [PMID: 36587026 PMCID: PMC9805446 DOI: 10.1038/s41398-022-02299-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 12/16/2022] [Accepted: 12/21/2022] [Indexed: 01/01/2023] Open
Abstract
Repeated cocaine exposure causes compensatory neuroadaptations in neurons in the nucleus accumbens (NAc), a region that mediates reinforcing effects of drugs. Previous studies suggested a role for adenosine monophosphate-activated protein kinase (AMPK), a cellular energy sensor, in modulating neuronal morphology and membrane excitability. However, the potential involvement of AMPK in cocaine use disorder is still unclear. The present study employed a cocaine self-administration model in rats to investigate the effect of AMPK and its target cyclic adenosine monophosphate response element binding protein-regulated transcriptional co-activator 1 (CRTC1) on cocaine reinforcement and the motivation for cocaine. We found that intravenous cocaine self-administration significantly decreased AMPK activity in the NAc shell (NAcsh), which persisted for at least 7 days of withdrawal. Cocaine reinforcement, reflected by self-administration behavior, was significantly prevented or enhanced by augmenting or suppressing AMPK activity pharmacologically and genetically, respectively. No difference in sucrose self-administration behavior was found after the same manipulations. The inhibition of AMPK activity in the NAcsh also increased the motivation for cocaine in progressive-ratio schedules of reinforcement, whereas the activation of AMPK had no effect. The knockdown of CRTC1 in the NAcsh significantly impaired cocaine reinforcement, which was rescued by pharmacologically increasing AMPK activity. Altogether, these results indicate that AMPK in the NAcsh is critical for cocaine reinforcement, possibly via the regulation of CRTC1 signaling. These findings may help reveal potential therapeutic targets and have important implications for the treatment of cocaine use disorder and relapse.
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25
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Xinqiang Y, Yuanyuan J, Zhipeng Y, Jie K, Xiao T, Yumeng H, Chenxi Z, Shiyu D, Mingpeng Y, Yanlin Z, Sihan C, Hao Y. Systemic administration of dorsomorphin relieves inflammatory nociception in the mouse formalin test. Int Immunopharmacol 2022; 113:109337. [DOI: 10.1016/j.intimp.2022.109337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 09/29/2022] [Accepted: 10/09/2022] [Indexed: 11/05/2022]
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26
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Ahsan M, Garneau L, Aguer C. The bidirectional relationship between AMPK pathway activation and myokine secretion in skeletal muscle: How it affects energy metabolism. Front Physiol 2022; 13:1040809. [PMID: 36479347 PMCID: PMC9721351 DOI: 10.3389/fphys.2022.1040809] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 11/04/2022] [Indexed: 11/12/2023] Open
Abstract
Myokines are peptides and proteins secreted by skeletal muscle cells, into the interstitium, or in the blood. Their regulation may be dependent or independent of muscle contraction to induce a variety of metabolic effects. Numerous myokines have been implicated in influencing energy metabolism via AMP-activated protein kinase (AMPK) signalling. As AMPK is centrally involved in glucose and lipid metabolism, it is important to understand how myokines influence its signalling, and vice versa. Such insight will better elucidate the mechanism of metabolic regulation during exercise and at rest. This review encompasses the latest research conducted on the relationship between AMPK signalling and myokines within skeletal muscles via autocrine or paracrine signalling.
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Affiliation(s)
- Mahdi Ahsan
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON, Canada
| | - Léa Garneau
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON, Canada
- Institut du Savoir Montfort –Recherche, Ottawa, ON, Canada
| | - Céline Aguer
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON, Canada
- Institut du Savoir Montfort –Recherche, Ottawa, ON, Canada
- Department of Physiology, Faculty of Medicine and Health Sciences, McGill University—Campus Outaouais, Gatineau, QC, Canada
- School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, ON, Canada
- Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, ON, Canada
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27
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Pak O, Nolte A, Knoepp F, Giordano L, Pecina P, Hüttemann M, Grossman LI, Weissmann N, Sommer N. Mitochondrial oxygen sensing of acute hypoxia in specialized cells - Is there a unifying mechanism? BIOCHIMICA ET BIOPHYSICA ACTA. BIOENERGETICS 2022; 1863:148911. [PMID: 35988811 DOI: 10.1016/j.bbabio.2022.148911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 08/12/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
Acclimation to acute hypoxia through cardiorespiratory responses is mediated by specialized cells in the carotid body and pulmonary vasculature to optimize systemic arterial oxygenation and thus oxygen supply to the tissues. Acute oxygen sensing by these cells triggers hyperventilation and hypoxic pulmonary vasoconstriction which limits pulmonary blood flow through areas of low alveolar oxygen content. Oxygen sensing of acute hypoxia by specialized cells thus is a fundamental pre-requisite for aerobic life and maintains systemic oxygen supply. However, the primary oxygen sensing mechanism and the question of a common mechanism in different specialized oxygen sensing cells remains unresolved. Recent studies unraveled basic oxygen sensing mechanisms involving the mitochondrial cytochrome c oxidase subunit 4 isoform 2 that is essential for the hypoxia-induced release of mitochondrial reactive oxygen species and subsequent acute hypoxic responses in both, the carotid body and pulmonary vasculature. This review compares basic mitochondrial oxygen sensing mechanisms in the pulmonary vasculature and the carotid body.
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Affiliation(s)
- Oleg Pak
- Justus Liebig University, Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Anika Nolte
- Justus Liebig University, Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Fenja Knoepp
- Justus Liebig University, Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Luca Giordano
- Justus Liebig University, Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Petr Pecina
- Laboratory of Bioenergetics, Institute of Physiology CAS, Prague, Czech Republic
| | - Maik Hüttemann
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI, USA
| | - Lawrence I Grossman
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI, USA
| | - Norbert Weissmann
- Justus Liebig University, Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Natascha Sommer
- Justus Liebig University, Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Giessen, Germany.
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28
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Yang AJT, Mohammad A, Tsiani E, Necakov A, MacPherson REK. Chronic AMPK Activation Reduces the Expression and Alters Distribution of Synaptic Proteins in Neuronal SH-SY5Y Cells. Cells 2022; 11:cells11152354. [PMID: 35954198 PMCID: PMC9367429 DOI: 10.3390/cells11152354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 07/22/2022] [Accepted: 07/25/2022] [Indexed: 11/16/2022] Open
Abstract
Neuronal growth and synaptic function are dependent on precise protein production and turnover at the synapse. AMPK-activated protein kinase (AMPK) represents a metabolic node involved in energy sensing and in regulating synaptic protein homeostasis. However, there is ambiguity surrounding the role of AMPK in regulating neuronal growth and health. This study examined the effect of chronic AMPK activation on markers of synaptic function and growth. Retinoic-acid-differentiated SH-SY5Y human neuroblastoma cells were treated with A-769662 (100 nM) or Compound C (30 nM) for 1, 3, or 5 days before AMPK, mTORC1, and markers for synapse function were examined. Cell morphology, neuronal marker content, and location were quantified after 5 days of treatment. AMPK phosphorylation was maintained throughout all 5 days of treatment with A-769662 and resulted in chronic mTORC1 inhibition. Lower total, soma, and neuritic neuronal marker contents were observed following 5 d of AMPK activation. Neurite protein abundance and distribution was lower following 5 days of A-769662 treatment. Our data suggest that chronic AMPK activation impacts synaptic protein content and reduces neurite protein abundance and distribution. These results highlight a distinct role that metabolism plays on markers of synapse health and function.
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Affiliation(s)
- Alex J. T. Yang
- Department of Health Sciences, Brock University, St. Catharines, ON L2S 3A1, Canada; (A.J.T.Y.); (A.M.); (E.T.)
| | - Ahmad Mohammad
- Department of Health Sciences, Brock University, St. Catharines, ON L2S 3A1, Canada; (A.J.T.Y.); (A.M.); (E.T.)
| | - Evangelia Tsiani
- Department of Health Sciences, Brock University, St. Catharines, ON L2S 3A1, Canada; (A.J.T.Y.); (A.M.); (E.T.)
| | - Aleksandar Necakov
- Department of Biological Sciences, Brock University, St. Catharines, ON L2S 3A1, Canada;
- Centre for Neuroscience, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Rebecca E. K. MacPherson
- Department of Health Sciences, Brock University, St. Catharines, ON L2S 3A1, Canada; (A.J.T.Y.); (A.M.); (E.T.)
- Centre for Neuroscience, Brock University, St. Catharines, ON L2S 3A1, Canada
- Correspondence:
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Lu Y, Zhang C, Chen J, Zou Q, Li B, Wei H, Chang MP, Liao X, Hu C. Hypothermia preconditioning improves cardiac contractility after cardiopulmonary resuscitation through AMPK-activated mitophagy. Exp Biol Med (Maywood) 2022; 247:1277-1286. [PMID: 35410532 PMCID: PMC9379608 DOI: 10.1177/15353702221081546] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Hypothermia preconditioning (HPC) improves cardiac function after cardiac arrest, yet the mechanism is unclear. We hypothesized that HPC-activated adenosine monophosphate-activated protein kinase (AMPK) activity may be involved. Adult male Wistar rats were randomly divided into normothermia Control, HPC (cooling to 32-34°C for 30 min), and HPC + Compound C (Compound C 10 mg/kg was injected intraperitoneally 30 min before HPC group). The rats underwent 7 min of untreated ventricular fibrillation (VF) followed by cardiopulmonary resuscitation (CPR). Cardiac function and hemodynamic parameters were evaluated at 4 h after return of spontaneous circulation (ROSC). Survival status was determined 72 h after ROSC. Mechanistically, we further examined the AMPK-Unc-51 Like Autophagy Activating Kinase 1 (ULK1)-mitophagy pathway and autophagic flux in vivo and in vitro. Six of twelve rats in the Control group, 10 of 12 rats in the HPC group, and 7 of 12 rats in HPC + Compound C group were successfully resuscitated. The 72-h survival rates were 1 of 12 Control, 6 of 12 HPC, and 2 of 12 HPC + Compound C rats, respectively (P = 0.043). Rats in the HPC group demonstrated greater cardiac contractility and hemodynamic stability which were compromised by Compound C. Furthermore, HPC increased the protein levels of p-AMPKα and p-ULK1 and promoted the expression of mitochondrial autophagy-related genes. Compound C decreased the expression of mitochondrial autophagy-related genes and reduced autophagic flux. Consistent with the observations obtained in vivo, in vitro experiments in cultured neonatal rat cardiomyocytes (CMs) demonstrated that HPC attenuated simulated ischemia-reperfusion-induced CM death, accompanied by increased AMPK-ULK1-mitophagy pathway activity. These findings suggest that AMPK-ULK1-mitophagy pathway was activated by HPC and has a crucial role in cardioprotection during cardiac arrest. Manipulation of mitophagy by hypothermia may merit further investigation as a novel strategy to prevent cardiac ischemia-reperfusion injury.
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Affiliation(s)
- Yuanzheng Lu
- Department of Emergency Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, P.R. China,Department of Emergency Medicine, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, P.R. China
| | - Chenyu Zhang
- Department of Emergency Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, P.R. China
| | - Jie Chen
- Department of Critical Care Medicine, The First People’s Hospital of Dongguan, Dongguan 523059, P.R. China
| | - Qiuping Zou
- Department of Emergency Medicine, The First People’s Hospital of Dongguan, Dongguan 523059, P.R. China
| | - Bo Li
- Department of Emergency Medicine, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, P.R. China
| | - Hongyan Wei
- Department of Emergency Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, P.R. China
| | - Mary P Chang
- Department of Emergency Medicine, University of Texas at Southwestern Medical Centre, Dallas, TX 75390, USA
| | - Xiaoxing Liao
- Department of Emergency Medicine, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, P.R. China,Research Institute, Sun Yat-sen University, Shenzhen 518057, P.R. China
| | - Chunlin Hu
- Department of Emergency Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, P.R. China,Chunlin Hu.
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30
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Patel SB, Nemkov T, D'Alessandro A, Welner RS. Deciphering Metabolic Adaptability of Leukemic Stem Cells. Front Oncol 2022; 12:846149. [PMID: 35756656 PMCID: PMC9213881 DOI: 10.3389/fonc.2022.846149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 05/16/2022] [Indexed: 11/13/2022] Open
Abstract
Therapeutic targeting of leukemic stem cells is widely studied to control leukemia. An emerging approach gaining popularity is altering metabolism as a potential therapeutic opportunity. Studies have been carried out on hematopoietic and leukemic stem cells to identify vulnerable pathways without impacting the non-transformed, healthy counterparts. While many metabolic studies have been conducted using stem cells, most have been carried out in vitro or on a larger population of progenitor cells due to challenges imposed by the low frequency of stem cells found in vivo. This creates artifacts in the studies carried out, making it difficult to interpret and correlate the findings to stem cells directly. This review discusses the metabolic difference seen between hematopoietic stem cells and leukemic stem cells across different leukemic models. Moreover, we also shed light on the advancements of metabolic techniques and current limitations and areas for additional research of the field to study stem cell metabolism.
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Affiliation(s)
- Sweta B Patel
- Department of Medicine, Division of Hematology/Oncology, O'Neal Comprehensive Cancer Center, University of Alabama at, Birmingham, AL, United States.,Divison of Hematology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Travis Nemkov
- Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Angelo D'Alessandro
- Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Robert S Welner
- Department of Medicine, Division of Hematology/Oncology, O'Neal Comprehensive Cancer Center, University of Alabama at, Birmingham, AL, United States
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Xiao J, Li W, Li G, Tan J, Dong N. STK11 overexpression prevents glucocorticoid-induced osteoporosis via activating the AMPK/SIRT1/PGC1α axis. Hum Cell 2022; 35:1045-1059. [PMID: 35543972 DOI: 10.1007/s13577-022-00704-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 04/16/2022] [Indexed: 11/04/2022]
Abstract
Osteoporosis (OP) is a frequent orthopedic disease characterized by pain, fractures and deformities. Glucocorticoids are the most common cause of secondary osteoporosis. Here, we aim to explore the function and mechanism of STK11 in glucocorticoid (GC)-induced OP. Human mesenchymal stromal cells (hMSCs) were differentiated under osteogenic or adipogenic culture medium. An in-vitro OP model was induced by dexamethasone (DEX). The viability, differentiation, apoptosis, and ROS level were evaluated for investigating the functions of SKT11 on hMSCs. The SIRT1 inhibitor EX-527, PGC1α inhibitor SR-18292, and AMPK activator metformin were administered into hMSCs for confirming the mechanism of SKT11. Our results showed that STK11 was down-regulated in OP tissues, as well as DEX-treated hMSCs. Overexpressing STK11 attenuated DEX-mediated inhibition of osteogenic differentiation and heightened the activation of the AMPK/SIRT1/PGC1α pathway, whereas STK11 knockdown exerted opposite effects. Inhibiting SIRT1 or PGC1α repressed the promotive effect of STK11 on osteogenic differentiation of hMSCs, while activation of AMPK abated the inhibitory effect of STK11 knockdown on osteogenic differentiation of hMSCs. In conclusion, this study revealed that overexpressing STK11 dampened GC-induced OP by activating the AMPK/SIRT1/PGC1α axis.
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Affiliation(s)
- Jiao Xiao
- Department of Endocrinology, The Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, No.336 Dongfeng South Road, Zhuhui District, Hengyang, 421001, Hunan, China
| | - Wenjin Li
- Department of Endocrinology, The Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, No.336 Dongfeng South Road, Zhuhui District, Hengyang, 421001, Hunan, China
| | - Guojuan Li
- Department of Endocrinology, The Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, No.336 Dongfeng South Road, Zhuhui District, Hengyang, 421001, Hunan, China
| | - Jiankai Tan
- Department of Endocrinology, The Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, No.336 Dongfeng South Road, Zhuhui District, Hengyang, 421001, Hunan, China
| | - Na Dong
- Department of Endocrinology, The Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, No.336 Dongfeng South Road, Zhuhui District, Hengyang, 421001, Hunan, China.
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de Siqueira DVF, Strazza PS, Benites NM, Leão RM. Salicylate activates KATP channels and reduces spontaneous firing in glycinergic cartwheel neurons in the dorsal cochlear nucleus of rats. Eur J Pharmacol 2022; 926:175026. [DOI: 10.1016/j.ejphar.2022.175026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 04/06/2022] [Accepted: 05/09/2022] [Indexed: 11/30/2022]
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Abstract
In 2011, CAMKK2, the gene encoding calcium/calmodulin-dependent kinase kinase 2 (CAMKK2), was demonstrated to be a direct target of the androgen receptor and a driver of prostate cancer progression. Results from multiple independent studies have confirmed these findings and demonstrated the potential role of CAMKK2 as a clinical biomarker and therapeutic target in advanced prostate cancer using a variety of preclinical models. Drug development efforts targeting CAMKK2 have begun accordingly. CAMKK2 regulation can vary across disease stages, which might have important implications in the use of CAMKK2 as a biomarker. Moreover, new non-cell-autonomous roles for CAMKK2 that could affect tumorigenesis, metastasis and possible comorbidities linked to disease and treatment have emerged and could present novel treatment opportunities for prostate cancer.
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Dexmedetomidine Can Enhance PINK1/Parkin-Mediated Mitophagy in MPTP-Induced PD Mice Model by Activating AMPK. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:7511393. [PMID: 35528513 PMCID: PMC9068320 DOI: 10.1155/2022/7511393] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 03/05/2022] [Accepted: 03/23/2022] [Indexed: 11/24/2022]
Abstract
Parkinson's disease (PD) is a common neurodegenerative disease characterized by the degeneration of dopaminergic (DA) neurons in the substantia nigra (SN). Our previous study has shown that dexmedetomidine (Dex) can protect mitochondrial function and reduce apoptosis in MPP+-induced SH-SY5Y cells. Evidences have shown that mitophagy is related to the development of PD. In this study, we investigated whether Dex can enhance mitophagy in MPTP-induced mice to play a neuroprotective effect. In our experiment, mice were injected with MPTP 30 mg/kg intraperitoneally for 5 consecutive days to establish a PD subacute model. Dex (30, 50, and 100 μg/kg) was injected intraperitoneally 30 minutes before each injection of MPTP, respectively. Our results showed that Dex (50 μg/kg) most significantly attenuated MPTP-induced motor dysfunction and restored TH-positive neurons in the SN, increased the expression of the antiapoptotic protein Bcl-2, and decreased the expression of apoptotic proteins cleaved casepase3, cleaved casepase9, and Bax. Moreover, Dex increased the activity of mitochondrial Complexes I-IV and decreased the level of oxidative stress, manifesting as decreased MDA levels and increased SOD and GSH-PX levels. Besides, under transmission electron microscopy, Dex increased the mitophagosome which is an autophagosome with a mitochondrion-like structure inside under the electron microscope. In addition, Dex could also increase the expression of mitophagy-related proteins p-AMPK, LC3II/I, PINK1, and Parkin and decrease P62. However, after using Compound C (CC, 10 mg/kg, AMPK inhibitor), the effects of Dex on increasing PINK1/Parkin-induced mitophagy and neuroprotection were attenuated. In conclusion, Dex may improve mitochondrial function by activating AMPK to enhance PINK1/Parkin-induced mitophagy, thereby protecting dopaminergic neurons.
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35
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AMPK Activation Is Indispensable for the Protective Effects of Caloric Restriction on Left Ventricular Function in Postinfarct Myocardium. BIOLOGY 2022; 11:biology11030448. [PMID: 35336822 PMCID: PMC8945456 DOI: 10.3390/biology11030448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/02/2022] [Accepted: 03/08/2022] [Indexed: 11/16/2022]
Abstract
Background: Caloric restriction (CR) extends lifespan in many species, including mammals. CR is cardioprotective in senescent myocardium by correcting pre-existing mitochondrial dysfunction and apoptotic activation. Furthermore, it confers cardioprotection against acute ischemia-reperfusion injury. Here, we investigated the role of AMP-activated protein kinase (AMPK) in mediating the cardioprotective CR effects in failing, postinfarct myocardium. Methods: Ligation of the left coronary artery or sham operation was performed in rats and mice. Four weeks after surgery, left ventricular (LV) function was analyzed by echocardiography, and animals were assigned to different feeding groups (control diet or 40% CR, 8 weeks) as matched pairs. The role of AMPK was investigated with an AMPK inhibitor in rats or the use of alpha 2 AMPK knock-out mice. Results: CR resulted in a significant improvement in LV function, compared to postinfarct animals receiving control diet in both species. The improvement in LV function was accompanied by a reduction in serum BNP, decrease in LV proapoptotic activation, and increase in mitochondrial biogenesis in the LV. Inhibition or loss of AMPK prevented most of these changes. Conclusions: The failing, postischemic heart is protected from progressive loss of LV systolic function by CR. AMPK activation is indispensable for these protective effects.
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36
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Li K, Jiang J, Shi Z, Zhan L, Peng L, Sun W, Tang Y, Zuo X, Xu E. Neuroprotective Effects of Rhodiola Sacra on Transient Global Cerebral Ischemia Through Activating AMPK/Nrf2 Pathway in Rats. Antioxid Redox Signal 2022; 36:567-591. [PMID: 34714119 DOI: 10.1089/ars.2020.8224] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Aims: Rhodiola sacra is a widely used pharmaceutical component with multiple functions, including anti-oxidation and anti-inflammation. However, the exact mechanisms involved in neuroprotection against transient global cerebral ischemia (tGCI) remain to be elucidated. Herein, we aim at closing the gap in understanding on whether rhodiola sacra reduces neuronal death in hippocampal CA1 and at demonstrating how rhodiola sacra offers neuroprotection after tGCI. Results: The results show that rhodiola sacra (2.4 g/kg/d by feeding) pretreatment or/and postreatment significantly alleviated neuronal injury, inhibited glial activation, and improved cognitive function in male rats subjected to tGCI. The neuroprotection of prophylaxis with rhodiola sacra is equivalent to that of therapeutics. The binding mode of adenosine monophosphate-activated protein kinase (AMPK) α2-subunit with rhodiola sacra was predicted by molecular docking. Further, rhodiola sacra upregulates phosphorylated AMPK and promotes nuclear translocation of nuclear factor erythroid 2 related factor 2 (Nrf2). In addition, rhodiola sacra increases heme oxygenase-1 (HO-1) expression and activity and reduces malondialdehyde (MDA) content in CA1 after tGCI. However, the neuroprotection of rhodiola sacra is abolished by Nrf2 knockdown with small interfering RNA (siRNA) after tGCI. Similarly, the inhibition of AMPK with Compound C or siRNA against AMPK α2 aggravates neuronal death after tGCI through decreasing nuclear Nrf2 and the expression and activity of HO-1, and by increasing the release of MDA. Innovation and Conclusion: For the first time, this study demonstrates that as a prophylactic or therapeutic agent rhodiola sacra prevents oxidant stress, protects neurons, and improves cognitive function through activating the AMPK/Nrf2 pathway in tGCI rats. Antioxid. Redox Signal. 36, 567-591.
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Affiliation(s)
- Kongping Li
- Key Laboratory of Neurogenetics and Channelopathies, Guangdong Province and the Ministry of Education of China, Guangzhou, China.,Department of Neurology, Institute of Neurosciences, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Jiaqi Jiang
- Key Laboratory of Neurogenetics and Channelopathies, Guangdong Province and the Ministry of Education of China, Guangzhou, China.,Department of Neurology, Institute of Neurosciences, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China.,Department of Neurology, The Sixth Affiliated Hospital, Guangzhou Medical University, The People's Hospital of Qingyuan, Qingyuan, China
| | - Zhe Shi
- Key Laboratory of Neurogenetics and Channelopathies, Guangdong Province and the Ministry of Education of China, Guangzhou, China.,Department of Neurology, Institute of Neurosciences, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China.,Department of Neurology, The Sixth Affiliated Hospital, Guangzhou Medical University, The People's Hospital of Qingyuan, Qingyuan, China
| | - Lixuan Zhan
- Key Laboratory of Neurogenetics and Channelopathies, Guangdong Province and the Ministry of Education of China, Guangzhou, China.,Department of Neurology, Institute of Neurosciences, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Linhui Peng
- Key Laboratory of Neurogenetics and Channelopathies, Guangdong Province and the Ministry of Education of China, Guangzhou, China.,Department of Neurology, Institute of Neurosciences, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Weiwen Sun
- Key Laboratory of Neurogenetics and Channelopathies, Guangdong Province and the Ministry of Education of China, Guangzhou, China.,Department of Neurology, Institute of Neurosciences, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Yanyan Tang
- Key Laboratory of Neurogenetics and Channelopathies, Guangdong Province and the Ministry of Education of China, Guangzhou, China.,Department of Neurology, Institute of Neurosciences, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Xialin Zuo
- Key Laboratory of Neurogenetics and Channelopathies, Guangdong Province and the Ministry of Education of China, Guangzhou, China.,Department of Neurology, Institute of Neurosciences, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - En Xu
- Key Laboratory of Neurogenetics and Channelopathies, Guangdong Province and the Ministry of Education of China, Guangzhou, China.,Department of Neurology, Institute of Neurosciences, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
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Galan-Cobo A, Stellrecht CM, Yilmaz E, Yang C, Qian Y, Qu X, Akhter I, Ayres ML, Fan Y, Tong P, Diao L, Ding J, Giri U, Gudikote J, Nilsson M, Wierda WG, Wang J, Skoulidis F, Minna JD, Gandhi V, Heymach JV. Enhanced Vulnerability of LKB1-Deficient NSCLC to Disruption of ATP Pools and Redox Homeostasis by 8-Cl-Ado. Mol Cancer Res 2022; 20:280-292. [PMID: 34654720 PMCID: PMC8816854 DOI: 10.1158/1541-7786.mcr-21-0448] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/30/2021] [Accepted: 10/12/2021] [Indexed: 11/16/2022]
Abstract
Loss-of-function somatic mutations of STK11, a tumor suppressor gene encoding LKB1 that contributes to the altered metabolic phenotype of cancer cells, is the second most common event in lung adenocarcinomas and often co-occurs with activating KRAS mutations. Tumor cells lacking LKB1 display an aggressive phenotype, with uncontrolled cell growth and higher energetic and redox stress due to its failure to balance ATP and NADPH levels in response to cellular stimulus. The identification of effective therapeutic regimens for patients with LKB1-deficient non-small cell lung cancer (NSCLC) remains a major clinical need. Here, we report that LKB1-deficient NSCLC tumor cells displayed reduced basal levels of ATP and to a lesser extent other nucleotides, and markedly enhanced sensitivity to 8-Cl-adenosine (8-Cl-Ado), an energy-depleting nucleoside analog. Treatment with 8-Cl-Ado depleted intracellular ATP levels, raised redox stress, and induced cell death leading to a compensatory suppression of mTOR signaling in LKB1-intact, but not LKB1-deficient, cells. Proteomic analysis revealed that the MAPK/MEK/ERK and PI3K/AKT pathways were activated in response to 8-Cl-Ado treatment and targeting these pathways enhanced the antitumor efficacy of 8-Cl-Ado. IMPLICATIONS: Together, our findings demonstrate that LKB1-deficient tumor cells are selectively sensitive to 8-Cl-Ado and suggest that therapeutic approaches targeting vulnerable energy stores combined with signaling pathway inhibitors merit further investigation for this patient population.
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Affiliation(s)
- Ana Galan-Cobo
- Department of Thoracic and Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Christine M Stellrecht
- Department of Thoracic and Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, Texas
- The University of Texas MD Anderson Cancer Center UT Health Graduate School of Biomedical Sciences, Houston, Texas
| | - Emrullah Yilmaz
- Department of Thoracic and Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
- University of New Mexico Comprehensive Cancer Center, Albuquerque, New Mexico
| | - Chao Yang
- Department of Thoracic and Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
- The University of Texas MD Anderson Cancer Center UT Health Graduate School of Biomedical Sciences, Houston, Texas
| | - Yu Qian
- Department of Thoracic and Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Xiao Qu
- Department of Thoracic and Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Institute of Oncology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, P.R. China
| | - Ishita Akhter
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Mary L Ayres
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Youhong Fan
- Department of Thoracic and Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Pan Tong
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Lixia Diao
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jie Ding
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Department of Gastrointestinal Surgery, Guizhou Provincial People's Hospital, Guiyang, P.R. China
| | - Uma Giri
- Department of Thoracic and Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jayanthi Gudikote
- Department of Thoracic and Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Monique Nilsson
- Department of Thoracic and Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - William G Wierda
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jing Wang
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Ferdinandos Skoulidis
- Department of Thoracic and Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - John D Minna
- Hamon Center for Therapeutic Oncology Research and Simmons Cancer Center, The University of Texas Southwestern Medical Center, Dallas, Texas
| | - Varsha Gandhi
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, Texas.
- The University of Texas MD Anderson Cancer Center UT Health Graduate School of Biomedical Sciences, Houston, Texas
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - John V Heymach
- Department of Thoracic and Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas.
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Kitaoka Y, Sase K, Tsukahara C, Fujita N, Arizono I, Kogo J, Tokuda N, Takagi H. Axonal Protection by Netarsudil, a ROCK Inhibitor, Is Linked to an AMPK-Autophagy Pathway in TNF-Induced Optic Nerve Degeneration. Invest Ophthalmol Vis Sci 2022; 63:4. [PMID: 34982146 PMCID: PMC8742515 DOI: 10.1167/iovs.63.1.4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Purpose Netarsudil, a Rho kinase inhibitor with norepinephrine transport inhibitory effect, lowers intraocular pressure, however, its effect on axon damage remains to be elucidated. The aim of the current study was to investigate the effect of netarsudil on TNF-induced axon loss and to examine whether it affects phosphorylated-AMP-activated kinase (p-AMPK) and autophagy in the optic nerve. Methods Intravitreal administration of TNF or TNF with netarsudil was carried out on rats and quantification of axon number was determined. Electron microscopy determined autophagosome numbers. Localization of p-AMPK expression was examined by immunohistochemistry. The changes in p62, LC3-II, and p-AMPK levels were estimated in the optic nerve by immunoblot analysis. The effect of an AMPK activator A769662 or an AMPK inhibitor dorsomorphin on axon number was evaluated. Results Morphometric analysis revealed apparent protection by netarsudil against TNF-induced axon degeneration. Netarsudil increased autophagosome numbers inside axons. Netarsudil treatment significantly upregulated optic nerve LC3-II levels in both the TNF-treated eyes and the control eyes. Increased p62 protein level induced by TNF was significantly ameliorated by netarsudil. The netarsudil administration alone lessened p62 levels. Netarsudil significantly upregulated the optic nerve p-AMPK levels. A769662 exhibited obvious axonal protection against TNF-induced damage. A769662 treatment upregulated LC3-II levels and the increment of p62 level induced by TNF was significantly ameliorated by A769662. Immunohistochemical analysis revealed that p-AMPK is present in axons. Netarsudil-mediated axonal protection was significantly suppressed by dorsomorphin administration. Conclusions Netarsudil upregulated p-AMPK and autophagy. Netarsudil-mediated axonal protection may be associated with upregulated p-AMPK.
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Affiliation(s)
- Yasushi Kitaoka
- Department of Molecular Neuroscience, St. Marianna University Graduate School of Medicine, Kanagawa, Japan
| | - Kana Sase
- Department of Ophthalmology, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Chihiro Tsukahara
- Department of Molecular Neuroscience, St. Marianna University Graduate School of Medicine, Kanagawa, Japan.,Department of Ophthalmology, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Naoki Fujita
- Department of Molecular Neuroscience, St. Marianna University Graduate School of Medicine, Kanagawa, Japan.,Department of Ophthalmology, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Ibuki Arizono
- Department of Molecular Neuroscience, St. Marianna University Graduate School of Medicine, Kanagawa, Japan.,Department of Ophthalmology, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Jiro Kogo
- Department of Ophthalmology, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Naoto Tokuda
- Department of Ophthalmology, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Hitoshi Takagi
- Department of Ophthalmology, St. Marianna University School of Medicine, Kanagawa, Japan
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Wang N, Huang R, Yang K, He Y, Gao Y, Dong D. Interfering with mitochondrial dynamics sensitizes glioblastoma multiforme to temozolomide chemotherapy. J Cell Mol Med 2021; 26:893-912. [PMID: 34964241 PMCID: PMC8817126 DOI: 10.1111/jcmm.17147] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 12/06/2021] [Accepted: 12/10/2021] [Indexed: 12/12/2022] Open
Abstract
Glioblastoma multiforme (GBM) is a primary tumour of the central nervous system (CNS) that exhibits the highest degree of malignancy. Radiotherapy and chemotherapy are essential to prolong the survival time of patients. However, clinical work has demonstrated that sensitivity of GBM to chemotherapy decreases with time. The phenomenon of multi-drug resistance (MDR) reminds us that there may exist some fundamental mechanisms in the process of chemo-resistance. We tried to explore the mechanism of GBM chemo-resistance from the perspective of energy metabolism. First, we found that the oxidative phosphorylation (OXPHOS) level of SHG44 and U87 cells increased under TMZ treatment. In further studies, it was found that the expression of PINK1 and mitophagy flux downstream was downregulated in GBM cells, which were secondary to the upregulation of TP53 in tumour cells under TMZ treatment. At the same time, we examined the mitochondrial morphology in tumour cells and found that the size of mitochondria in tumour cells increased under the treatment of TMZ, which originated from the regulation of AMPK on the subcellular localization of Drp1 under the condition of unbalanced energy supply and demand in tumour cells. The accumulation of mitochondrial mass and the optimization of mitochondrial quality accounted for the increased oxidative phosphorylation, and interruption of the mitochondrial fusion process downregulated the efficiency of oxidative phosphorylation and sensitized GBM cells to TMZ, which was also confirmed in the in vivo experiment. What is more, interfering with this process is an innovative strategy to overcome the chemo-resistance of GBM cells.
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Affiliation(s)
- Nan Wang
- China-Japan Union Hospital, Jilin University, Changchun, China
| | - Renxuan Huang
- China-Japan Union Hospital, Jilin University, Changchun, China
| | - Kunmeng Yang
- The First Hospital of Jilin University, Changchun, China
| | - Yichun He
- China-Japan Union Hospital, Jilin University, Changchun, China
| | - Yufei Gao
- China-Japan Union Hospital, Jilin University, Changchun, China
| | - Delu Dong
- The Basic Medical College of Jilin University, Changchun, China
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40
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Cheng XS, Shi FX, Zhao KP, Lin W, Li XY, Zhang J, Bu YY, Zhu R, Li XH, Duan DX, Ji XY, Wei JS, Wang JZ, Du J, Zhou XW. Nmnat2 attenuates amyloidogenesis and up-regulates ADAM10 in AMPK activity-dependent manner. Aging (Albany NY) 2021; 13:23620-23636. [PMID: 34644262 PMCID: PMC8580354 DOI: 10.18632/aging.203634] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 10/03/2021] [Indexed: 12/16/2022]
Abstract
Amyloid-β (Aβ) accumulating is considered as a causative factor for formation of senile plaque in Alzheimer’s disease (AD), but its mechanism is still elusive. The Nicotinamide mononucleotide adenylyltransferase 2 (Nmnat2), a key redox cofactor for energy metabolism, is reduced in AD. Accumulative evidence has shown that the decrease of α-secretase activity, a disintegrin and metalloprotease domain 10 (ADAM10), is responsible for the increase of Aβ productions in AD patient’s brain. Here, we observe that the activity of α-secretase ADAM10 and levels of Nmnat2 are significantly decreased, meanwhile there is a simultaneous elevation of Aβ in Tg2576 mice. Over-expression of Nmnat2 increases the mRNA expression of α-secretase ADAM10 and its activity and inhibits Aβ production in N2a/APPswe cells, which can be abolished by Compound C, an AMPK antagonist, suggesting that AMPK is involved in over-expression of Nmnat2 against Aβ production. The further assays demonstrate that Nmnat2 activates AMPK by up-regulating the ratio of NAD+/NADH, moreover AMPK agonist AICAR can also increase ADAM10 activity and reduces Aβ1-40/1-42. Taken together, Nmnat2 suppresses Aβ production and up-regulates ADAM10 in AMPK activity-dependent manner, suggesting that Nmnat2 may serve as a new potential target in arresting AD.
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Affiliation(s)
- Xiang-Shu Cheng
- Department of Neurology, Translational Medicine Center, Huaihe Hospital Affiliated to Henan University, Kaifeng 475000, Henan, China.,Department of Pathophysiology, Key Laboratory of Neurological Disease of National Education Ministry and Hubei Province, Institute for Brain Research, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China.,Brain Research Laboratory, Henan University, Kaifeng 475004, Henan, China
| | - Fang-Xiao Shi
- Department of Pathophysiology, Key Laboratory of Neurological Disease of National Education Ministry and Hubei Province, Institute for Brain Research, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
| | - Kun-Peng Zhao
- Department of Pathophysiology, Key Laboratory of Neurological Disease of National Education Ministry and Hubei Province, Institute for Brain Research, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China.,Department of Psychiatry, Henan Key Lab of Biological Psychiatry, Henan Mental Hospital, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang 453002, Henan, China
| | - Wang Lin
- Department of Pathophysiology, Key Laboratory of Neurological Disease of National Education Ministry and Hubei Province, Institute for Brain Research, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
| | - Xiao-Ying Li
- Department of Neurology, Translational Medicine Center, Huaihe Hospital Affiliated to Henan University, Kaifeng 475000, Henan, China
| | - Jun Zhang
- Department of Neurology, Translational Medicine Center, Huaihe Hospital Affiliated to Henan University, Kaifeng 475000, Henan, China
| | - Yao-Yao Bu
- Department of Neurology, Translational Medicine Center, Huaihe Hospital Affiliated to Henan University, Kaifeng 475000, Henan, China
| | - Rui Zhu
- Department of Pathophysiology, Key Laboratory of Neurological Disease of National Education Ministry and Hubei Province, Institute for Brain Research, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
| | - Xiao-Hong Li
- Department of Pathophysiology, Key Laboratory of Neurological Disease of National Education Ministry and Hubei Province, Institute for Brain Research, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
| | - Dong-Xiao Duan
- Department of Pathophysiology, Key Laboratory of Neurological Disease of National Education Ministry and Hubei Province, Institute for Brain Research, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China.,Department of Physiology, Basic Medical College, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Xin-Ying Ji
- Department of Microbiology, Henan International Joint Laboratory for Nuclear Protein Regulation, School of Basic Medical Sciences, Henan University, Kaifeng 475004, Henan, China
| | - Jian-She Wei
- Brain Research Laboratory, Henan University, Kaifeng 475004, Henan, China
| | - Jian-Zhi Wang
- Department of Pathophysiology, Key Laboratory of Neurological Disease of National Education Ministry and Hubei Province, Institute for Brain Research, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
| | - Jin Du
- Department of Neurology, Translational Medicine Center, Huaihe Hospital Affiliated to Henan University, Kaifeng 475000, Henan, China.,Department of Respiratory, Huaihe Hospital Affiliated to Henan University, Kaifeng 475000, Henan, China.,Brain Research Laboratory, Henan University, Kaifeng 475004, Henan, China
| | - Xin-Wen Zhou
- Department of Pathophysiology, Key Laboratory of Neurological Disease of National Education Ministry and Hubei Province, Institute for Brain Research, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
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Majhi RK, Mohanty S, Kamolvit W, White JK, Scheffschick A, Brauner H, Brauner A. Metformin strengthens uroepithelial immunity against E. coli infection. Sci Rep 2021; 11:19263. [PMID: 34584119 PMCID: PMC8479095 DOI: 10.1038/s41598-021-98223-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 09/06/2021] [Indexed: 11/29/2022] Open
Abstract
Urinary tract infection frequently caused by E. coli is one of the most common bacterial infections. Increasing antibiotic resistance jeopardizes successful treatment and alternative treatment strategies are therefore mandatory. Metformin, an oral antidiabetic drug, has been shown to activate macrophages in the protection against certain infecting microorganisms. Since epithelial cells often form the first line of defense, we here investigated the effect on uroepithelial cells during E. coli infection. Metformin upregulated the human antimicrobial peptides cathelicidin LL-37 and RNase7 via modulation of the TRPA1 channel and AMPK pathway. Interestingly, metformin stimulation enriched both LL-37 and TRPA1 in lysosomes. In addition, metformin specifically increased nitric oxide and mitochondrial, but not cytosolic ROS. Moreover, metformin also triggered mRNA expression of the proinflammatory cytokines IL1B, CXCL8 and growth factor GDF15 in human uroepithelial cells. The GDF15 peptide stimulated macrophages increased LL-37 expression, with increased bacterial killing. In conclusion, metformin stimulation strengthened the innate immunity of uroepithelial cells inducing enhanced extracellular and intracellular bacterial killing suggesting a favorable role of metformin in the host defense.
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Affiliation(s)
- Rakesh Kumar Majhi
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.,Division of Clinical Microbiology, Karolinska University Hospital, Stockholm, Sweden
| | - Soumitra Mohanty
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.,Division of Clinical Microbiology, Karolinska University Hospital, Stockholm, Sweden
| | - Witchuda Kamolvit
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.,Division of Clinical Microbiology, Karolinska University Hospital, Stockholm, Sweden
| | - John Kerr White
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.,Division of Clinical Microbiology, Karolinska University Hospital, Stockholm, Sweden
| | | | - Hanna Brauner
- Department of Medicine, Karolinska Institutet, Stockholm, Sweden.,Dermatology and Venereology Clinic, Karolinska University Hospital, Stockholm, Sweden
| | - Annelie Brauner
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden. .,Division of Clinical Microbiology, Karolinska University Hospital, Stockholm, Sweden. .,Division of Clinical Microbiology, Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet and Karolinska University Hospital, 17176, Stockholm, Sweden.
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Hunter KS, Miller A, Mentink-Kane M, Davies SJ. Schistosome AMPK Is Required for Larval Viability and Regulates Glycogen Metabolism in Adult Parasites. Front Microbiol 2021; 12:726465. [PMID: 34539616 PMCID: PMC8440919 DOI: 10.3389/fmicb.2021.726465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 08/12/2021] [Indexed: 11/25/2022] Open
Abstract
On entering the mammalian host, schistosomes transition from a freshwater environment where resources are scarce, to an environment where there is an unlimited supply of glucose, their preferred energy substrate. Adult schistosome glycolytic activity consumes almost five times the parasite's dry weight in glucose per day to meet the parasite's energy demands, and the schistosome glycolytic enzymes and mechanisms for glucose uptake that sustain this metabolic activity have previously been identified. However, little is known of the parasite processes that regulate schistosome glucose metabolism. We previously described the Schistosoma mansoni ortholog of 5' AMP-Activated Protein Kinase (AMPK), which is a central regulator of energy metabolism in eukaryotes, and characterized the developmental regulation of its expression and activity in S. mansoni. Here we sought to explore the function of AMPK in schistosomes and test whether it regulates parasite glycolysis. Adult schistosomes mounted a compensatory response to chemical inhibition of AMPK α, resulting in increased AMPK α protein abundance and activity. RNAi inhibition of AMPK α expression, however, suggests that AMPK α is not required for adult schistosome viability in vitro. Larval schistosomula, on the other hand, are sensitive to chemical AMPK α inhibition, and this correlates with inactivity of the AMPK α gene in this life cycle stage that precludes a compensatory response to AMPK inhibition. While our data indicate that AMPK is not essential in adult schistosomes, our results suggest that AMPK regulates adult worm glycogen stores, influencing both glycogen utilization and synthesis. AMPK may therefore play a role in the ability of adult schistosomes to survive in vivo stressors such as transient glucose deprivation and oxidative stress. These findings suggest that AMPK warrants further investigation as a potential drug target, especially for interventions aimed at preventing establishment of a schistosome infection.
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Affiliation(s)
- Kasandra S Hunter
- Department of Microbiology and Immunology, F. Edward Hébert School of Medicine, Uniformed Services University, Bethesda, MD, United States
| | - André Miller
- Schistosomiasis Resource Center, Biomedical Research Institute, Rockville, MD, United States
| | - Margaret Mentink-Kane
- Schistosomiasis Resource Center, Biomedical Research Institute, Rockville, MD, United States
| | - Stephen J Davies
- Department of Microbiology and Immunology, F. Edward Hébert School of Medicine, Uniformed Services University, Bethesda, MD, United States
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Wang Y, Chen X, Fan W, Zhang X, Zhan S, Zhong T, Guo J, Cao J, Li L, Zhang H, Wang L. Integrated application of metabolomics and RNA-seq reveals thermogenic regulation in goat brown adipose tissues. FASEB J 2021; 35:e21868. [PMID: 34449920 DOI: 10.1096/fj.202100493rr] [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: 03/23/2021] [Revised: 08/05/2021] [Accepted: 08/09/2021] [Indexed: 12/13/2022]
Abstract
Brown adipose tissue (BAT) plays an important role on no shivering thermogenesis during cold exposure to maintain animal body temperature and energy homeostasis. However, knowledge of the cellular transition from white adipose tissue (WAT) to BAT is still limited. In this study, we provided a comprehensive metabolomics and transcriptional signatures of goat BAT and WAT. A total of 157 metabolites were significantly changed, including 81 upregulated and 76 downregulated metabolites. In addition, we identified the citric acid cycle, fatty acid elongation, and degradation pathways as coordinately activated in BAT. Interestingly, five unsaturated fatty acids (Eicosadienoic Acid, C20:2; γ-Linolenic acid, C20:3; Arachidonic Acid, C20:4; Adrenic acid, C22:4; Docosahexaenoic acid, C22:6), Succinate, L-carnitine, and L-palmitoyl-carnitine were found to be abundant in BAT. Furthermore, L-carnitine, an intermediate of fatty acid degradation, is required for goat brown adipocyte differentiation and thermogenesis through activating AMPK pathway. However, L-carnitine decreased lipid accumulation through inducing lipolysis and thermogenesis in white adipocytes. These results revealed that there are the significant alterations in transcriptomic and metabolomic profiles between goat WAT and BAT, which may contribute to better understanding the roles of metabolites in BAT thermogenesis process.
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Affiliation(s)
- Yan Wang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, P.R. China
| | - Xingyue Chen
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, P.R. China
| | - Wenli Fan
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, P.R. China
| | - Xujia Zhang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, P.R. China
| | - Siyuan Zhan
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, P.R. China.,Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, P.R. China
| | - Tao Zhong
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, P.R. China.,Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, P.R. China
| | - Jiazhong Guo
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, P.R. China
| | - Jiaxue Cao
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, P.R. China
| | - Li Li
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, P.R. China.,Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, P.R. China
| | - Hongping Zhang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, P.R. China
| | - Linjie Wang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, P.R. China.,Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu, P.R. China
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44
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Li SX, Li C, Pang XR, Zhang J, Yu GC, Yeo AJ, Lavin MF, Shao H, Jia Q, Peng C. Metformin Attenuates Silica-Induced Pulmonary Fibrosis by Activating Autophagy via the AMPK-mTOR Signaling Pathway. Front Pharmacol 2021; 12:719589. [PMID: 34434111 PMCID: PMC8381252 DOI: 10.3389/fphar.2021.719589] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 07/26/2021] [Indexed: 12/12/2022] Open
Abstract
Long-term exposure to crystalline silica particles leads to silicosis characterized by persistent inflammation and progressive fibrosis in the lung. So far, there is no specific treatment to cure the disease other than supportive care. In this study, we examined the effects of metformin, a prescribed drug for type || diabetes on silicosis and explored the possible mechanisms in an established rat silicosis model in vivo, and an in vitro co-cultured model containing human macrophages cells (THP-1) and human bronchial epithelial cells (HBEC). Our results showed that metformin significantly alleviated the inflammation and fibrosis of lung tissues of rats exposed to silica particles. Metformin significantly reduced silica particle-induced inflammatory cytokines including transforming growth factor-β1 (TGF-β1), tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) in rat lung tissue and HBEC culture supernatant. The protein levels of Vimentin and α-smooth muscle actin (α-SMA) were significantly decreased by metfomin while expression level of E-cadherin (E-Cad) increased. Besides, metformin increased the expression levels of phosphorylated adenosine 5′-monophosphate (AMP)-activated protein kinase (p-AMPK), microtubule-associated protein (MAP) light chain 3B (LC3B) and Beclin1 proteins, and reduced levels of phosphorylated mammalian target of rapamycin (p-mTOR) and p62 proteins in vivo and in vitro. These results suggest that metformin could inhibit silica-induced pulmonary fibrosis by activating autophagy through the AMPK-mTOR pathway.
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Affiliation(s)
- Shu-Xian Li
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Chao Li
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Xin-Ru Pang
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Juan Zhang
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Gong-Chang Yu
- Neck-Shoulder and Lumbocrural Pain Hospital of Shandong First Medical University, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Abrey J Yeo
- University of Queensland Centre for Clinical Research (UQCCR), Brisbane, QLD, Australia
| | - Martin F Lavin
- University of Queensland Centre for Clinical Research (UQCCR), Brisbane, QLD, Australia
| | - Hua Shao
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Qiang Jia
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Cheng Peng
- Queensland Alliance for Environmental Health Sciences (QAEHS), The University of Queensland, Brisbane, QLD, Australia
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45
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Ahwazi D, Neopane K, Markby GR, Kopietz F, Ovens AJ, Dall M, Hassing AS, Gräsle P, Alshuweishi Y, Treebak JT, Salt IP, Göransson O, Zeqiraj E, Scott JW, Sakamoto K. Investigation of the specificity and mechanism of action of the ULK1/AMPK inhibitor SBI-0206965. Biochem J 2021; 478:2977-2997. [PMID: 34259310 PMCID: PMC8370752 DOI: 10.1042/bcj20210284] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 07/12/2021] [Accepted: 07/13/2021] [Indexed: 11/17/2022]
Abstract
SBI-0206965, originally identified as an inhibitor of the autophagy initiator kinase ULK1, has recently been reported as a more potent and selective AMP-activated protein kinase (AMPK) inhibitor relative to the widely used, but promiscuous inhibitor Compound C/Dorsomorphin. Here, we studied the effects of SBI-0206965 on AMPK signalling and metabolic readouts in multiple cell types, including hepatocytes, skeletal muscle cells and adipocytes. We observed SBI-0206965 dose dependently attenuated AMPK activator (991)-stimulated ACC phosphorylation and inhibition of lipogenesis in hepatocytes. SBI-0206965 (≥25 μM) modestly inhibited AMPK signalling in C2C12 myotubes, but also inhibited insulin signalling, insulin-mediated/AMPK-independent glucose uptake, and AICA-riboside uptake. We performed an extended screen of SBI-0206965 against a panel of 140 human protein kinases in vitro, which showed SBI-0206965 inhibits several kinases, including members of AMPK-related kinases (NUAK1, MARK3/4), equally or more potently than AMPK or ULK1. This screen, together with molecular modelling, revealed that most SBI-0206965-sensitive kinases contain a large gatekeeper residue with a preference for methionine at this position. We observed that mutation of the gatekeeper methionine to a smaller side chain amino acid (threonine) rendered AMPK and ULK1 resistant to SBI-0206965 inhibition. These results demonstrate that although SBI-0206965 has utility for delineating AMPK or ULK1 signalling and cellular functions, the compound potently inhibits several other kinases and critical cellular functions such as glucose and nucleoside uptake. Our study demonstrates a role for the gatekeeper residue as a determinant of the inhibitor sensitivity and inhibitor-resistant mutant forms could be exploited as potential controls to probe specific cellular effects of SBI-0206965.
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Affiliation(s)
- Danial Ahwazi
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | - Katyayanee Neopane
- Nestlé Institute of Health Sciences, Nestlé Research, Societé Produit de Nestlé S.A
- School of Life Sciences, École polytechnique fédérale de Lausanne, Lausanne, Switzerland
| | - Greg R. Markby
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | - Franziska Kopietz
- Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Ashley J. Ovens
- St Vincent's Institute of Medical Research, Fitzroy, Melbourne, Australia
- Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
| | - Morten Dall
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | - Anna S. Hassing
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | - Pamina Gräsle
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | - Yazeed Alshuweishi
- Institute of Cardiovascular and Medical Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, U.K
- Department of Clinical Laboratory Sciences, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Jonas T. Treebak
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | - Ian P. Salt
- Institute of Cardiovascular and Medical Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, U.K
| | - Olga Göransson
- Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Elton Zeqiraj
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, U.K
| | - John W. Scott
- St Vincent's Institute of Medical Research, Fitzroy, Melbourne, Australia
- Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
- The Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, Australia
| | - Kei Sakamoto
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
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Aguilar-Recarte D, Palomer X, Wahli W, Vázquez-Carrera M. The PPARβ/δ-AMPK Connection in the Treatment of Insulin Resistance. Int J Mol Sci 2021; 22:8555. [PMID: 34445261 PMCID: PMC8395240 DOI: 10.3390/ijms22168555] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/03/2021] [Accepted: 08/05/2021] [Indexed: 12/12/2022] Open
Abstract
The current treatment options for type 2 diabetes mellitus do not adequately control the disease in many patients. Consequently, there is a need for new drugs to prevent and treat type 2 diabetes mellitus. Among the new potential pharmacological strategies, activators of peroxisome proliferator-activated receptor (PPAR)β/δ show promise. Remarkably, most of the antidiabetic effects of PPARβ/δ agonists involve AMP-activated protein kinase (AMPK) activation. This review summarizes the recent mechanistic insights into the antidiabetic effects of the PPARβ/δ-AMPK pathway, including the upregulation of glucose uptake, muscle remodeling, enhanced fatty acid oxidation, and autophagy, as well as the inhibition of endoplasmic reticulum stress and inflammation. A better understanding of the mechanisms underlying the effects resulting from the PPARβ/δ-AMPK pathway may provide the basis for the development of new therapies in the prevention and treatment of insulin resistance and type 2 diabetes mellitus.
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Affiliation(s)
- David Aguilar-Recarte
- Department of Pharmacology, Toxicology and Therapeutic Chemistry, Institute of Biomedicine of the University of Barcelona (IBUB), Faculty of Pharmacy and Food Sciences, University of Barcelona, Avinguda Joan XXIII 27-31, 08028 Barcelona, Spain; (D.A.-R.); (X.P.)
- Pediatric Research Institute-Hospital Sant Joan de Déu, 08950 Esplugues de Llobregat, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Diseases (CIBERDEM)-Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Xavier Palomer
- Department of Pharmacology, Toxicology and Therapeutic Chemistry, Institute of Biomedicine of the University of Barcelona (IBUB), Faculty of Pharmacy and Food Sciences, University of Barcelona, Avinguda Joan XXIII 27-31, 08028 Barcelona, Spain; (D.A.-R.); (X.P.)
- Pediatric Research Institute-Hospital Sant Joan de Déu, 08950 Esplugues de Llobregat, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Diseases (CIBERDEM)-Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Walter Wahli
- Center for Integrative Genomics, University of Lausanne, CH-1015 Lausanne, Switzerland;
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Singapore 308232, Singapore
- ToxAlim (Research Center in Food Toxicology), INRAE, UMR1331, CEDEX, 31300 Toulouse, France
| | - Manuel Vázquez-Carrera
- Department of Pharmacology, Toxicology and Therapeutic Chemistry, Institute of Biomedicine of the University of Barcelona (IBUB), Faculty of Pharmacy and Food Sciences, University of Barcelona, Avinguda Joan XXIII 27-31, 08028 Barcelona, Spain; (D.A.-R.); (X.P.)
- Pediatric Research Institute-Hospital Sant Joan de Déu, 08950 Esplugues de Llobregat, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Diseases (CIBERDEM)-Instituto de Salud Carlos III, 28029 Madrid, Spain
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Claisened Hexafluoro Inhibits Metastatic Spreading of Amoeboid Melanoma Cells. Cancers (Basel) 2021; 13:cancers13143551. [PMID: 34298765 PMCID: PMC8305480 DOI: 10.3390/cancers13143551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 06/30/2021] [Accepted: 07/13/2021] [Indexed: 11/17/2022] Open
Abstract
Metastatic melanoma is characterized by poor prognosis and a low free-survival rate. Thanks to their high plasticity, melanoma cells are able to migrate exploiting different cell motility strategies, such as the rounded/amoeboid-type motility and the elongated/mesenchymal-type motility. In particular, the amoeboid motility strongly contributes to the dissemination of highly invasive melanoma cells and no treatment targeting this process is currently available for clinical application. Here, we tested Claisened Hexafluoro as a novel inhibitor of the amoeboid motility. Reported data demonstrate that Claisened Hexafluoro specifically inhibits melanoma cells moving through amoeboid motility by deregulating mitochondrial activity and activating the AMPK signaling. Moreover, Claisened Hexafluoro is able to interfere with the adhesion abilities and the stemness features of melanoma cells, thus decreasing the in vivo metastatic process. This evidence may contribute to pave the way for future possible therapeutic applications of Claisened Hexafluoro to counteract metastatic melanoma dissemination.
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Vozza EG, Mulcahy ME, McLoughlin RM. Making the Most of the Host; Targeting the Autophagy Pathway Facilitates Staphylococcus aureus Intracellular Survival in Neutrophils. Front Immunol 2021; 12:667387. [PMID: 34220813 PMCID: PMC8242348 DOI: 10.3389/fimmu.2021.667387] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 05/28/2021] [Indexed: 12/21/2022] Open
Abstract
The success of Staphylococcus aureus as a human commensal and an opportunistic pathogen relies on its ability to adapt to several niches within the host. The innate immune response plays a key role in protecting the host against S. aureus infection; however, S. aureus adeptness at evading the innate immune system is indisputably evident. The “Trojan horse” theory has been postulated to describe a mechanism by which S. aureus takes advantage of phagocytes as a survival niche within the host to facilitate dissemination of S. aureus to secondary sites during systemic infection. Several studies have determined that S. aureus can parasitize both professional and non-professional phagocytes by manipulating the host autophagy pathway in order to create an intracellular survival niche. Neutrophils represent a critical cell type in S. aureus infection as demonstrated by the increased risk of infection among patients with congenital neutrophil disorders. However, S. aureus has been repeatedly shown to survive intracellularly within neutrophils with evidence now supporting a pathogenic role of host autophagy. By manipulating this pathway, S. aureus can also alter the apoptotic fate of the neutrophil and potentially skew other important signalling pathways for its own gain. Understanding these critical host-pathogen interactions could lead to the development of new host directed therapeutics for the treatment of S. aureus infection by removing its intracellular niche and restoring host bactericidal functions. This review discusses the current findings surrounding intracellular survival of S. aureus within neutrophils, the pathogenic role autophagy plays in this process and considers the therapeutic potential for targeting this immune evasion mechanism.
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Affiliation(s)
- Emilio G Vozza
- Host-Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Michelle E Mulcahy
- Host-Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Rachel M McLoughlin
- Host-Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
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Antipsychotic drugs counteract autophagy and mitophagy in multiple sclerosis. Proc Natl Acad Sci U S A 2021; 118:2020078118. [PMID: 34099564 DOI: 10.1073/pnas.2020078118] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Multiple sclerosis (MS) is a neuroinflammatory and neurodegenerative disease characterized by myelin damage followed by axonal and ultimately neuronal loss. The etiology and physiopathology of MS are still elusive, and no fully effective therapy is yet available. We investigated the role in MS of autophagy (physiologically, a controlled intracellular pathway regulating the degradation of cellular components) and of mitophagy (a specific form of autophagy that removes dysfunctional mitochondria). We found that the levels of autophagy and mitophagy markers are significantly increased in the biofluids of MS patients during the active phase of the disease, indicating activation of these processes. In keeping with this idea, in vitro and in vivo MS models (induced by proinflammatory cytokines, lysolecithin, and cuprizone) are associated with strongly impaired mitochondrial activity, inducing a lactic acid metabolism and prompting an increase in the autophagic flux and in mitophagy. Multiple structurally and mechanistically unrelated inhibitors of autophagy improved myelin production and normalized axonal myelination, and two such inhibitors, the widely used antipsychotic drugs haloperidol and clozapine, also significantly improved cuprizone-induced motor impairment. These data suggest that autophagy has a causal role in MS; its inhibition strongly attenuates behavioral signs in an experimental model of the disease. Therefore, haloperidol and clozapine may represent additional therapeutic tools against MS.
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Knockout of the CMP-Sialic Acid Transporter SLC35A1 in Human Cell Lines Increases Transduction Efficiency of Adeno-Associated Virus 9: Implications for Gene Therapy Potency Assays. Cells 2021; 10:cells10051259. [PMID: 34069698 PMCID: PMC8160606 DOI: 10.3390/cells10051259] [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] [Received: 04/22/2021] [Revised: 05/12/2021] [Accepted: 05/18/2021] [Indexed: 01/04/2023] Open
Abstract
Recombinant adeno-associated viruses (AAV) have emerged as an important tool for gene therapy for human diseases. A prerequisite for clinical approval is an in vitro potency assay that can measure the transduction efficiency of each virus lot produced. The AAV serotypes are typical for gene therapy bind to different cell surface structures. The binding of AAV9 on the surface is mediated by terminal galactose residues present in the asparagine-linked carbohydrates in glycoproteins. However, such terminal galactose residues are rare in cultured cells. They are masked by sialic acid residues, which is an obstacle for the infection of many cell lines with AAV9 and the respective potency assays. The sialic acid residues can be removed by enzymatic digestion or chemical treatment. Still, such treatments are not practical for AAV9 potency assays since they may be difficult to standardize. In this study, we generated human cell lines (HEK293T and HeLa) that become permissive for AAV9 transduction after a knockout of the CMP–sialic acid transporter SLC35A1. Using the human aspartylglucosaminidase (AGA) gene, we show that these cell lines can be used as a model system for establishing potency assays for AAV9-based gene therapy approaches for human diseases.
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