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Hwangbo H, Park C, Bang E, Kim HS, Bae SJ, Kim E, Jung Y, Leem SH, Seo YR, Hong SH, Kim GY, Hyun JW, Choi YH. Morroniside Protects C2C12 Myoblasts from Oxidative Damage Caused by ROS-Mediated Mitochondrial Damage and Induction of Endoplasmic Reticulum Stress. Biomol Ther (Seoul) 2024:biomolther.2024.012. [PMID: 38602043 DOI: 10.4062/biomolther.2024.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 03/05/2024] [Accepted: 03/13/2024] [Indexed: 04/12/2024] Open
Abstract
Oxidative stress contributes to the onset of chronic diseases in various organs, including muscles. Morroniside, a type of iridoid glycoside contained in Cornus officinalis, is reported to have advantages as a natural compound that prevents various diseases. However, the question of whether this phytochemical exerts any inhibitory effect against oxidative stress in muscle cells has not been well reported. Therefore, the current study aimed to evaluate whether morroniside can protect against oxidative damage induced by hydrogen peroxide (H2O2) in murine C2C12 myoblasts. Our results demonstrate that morroniside pretreatment was able to inhibit cytotoxicity while suppressing H2O2-induced DNA damage and apoptosis. Morroniside also significantly improved the antioxidant capacity in H2O2-challenged C2C12 cells by blocking the production of cellular reactive oxygen species and mitochondrial superoxide and increasing glutathione production. In addition, H2O2-induced mitochondrial damage and endoplasmic reticulum (ER) stress were effectively attenuated by morroniside pretreatment, inhibiting cytoplasmic leakage of cytochrome c and expression of ER stress-related proteins. Furthermore, morroniside neutralized H2O2-mediated calcium (Ca2+) overload in mitochondria and mitigated the expression of calpains, cytosolic Ca2+-dependent proteases. Collectively, these findings demonstrate that morroniside protected against mitochondrial impairment and Ca2+-mediated ER stress by minimizing oxidative stress, thereby inhibiting H2O2-induced cytotoxicity in C2C12 myoblasts.
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Affiliation(s)
- Hyun Hwangbo
- Basic Research Laboratory for the Regulation of Microplastic-Mediated Diseases, Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47340, Republic of Korea
| | - Cheol Park
- Department Division of Basic Sciences, College of Liberal Studies, Dong-eui University, Busan 47340, Republic of Korea
| | - EunJin Bang
- Basic Research Laboratory for the Regulation of Microplastic-Mediated Diseases, Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47340, Republic of Korea
| | - Hyuk Soon Kim
- Department of Biomedical Sciences, College of Natural Science and Department of Health Sciences, The Graduate School of Dong-A University, Busan 49315, Republic of Korea
| | - Sung-Jin Bae
- Department of Molecular Biology and Immunology, Kosin University College of Medicine, Busan 49267, Republic of Korea
| | - Eunjeong Kim
- BK21 Plus KNU Creative BioResearch Group, School of Life Sciences, College of National Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Youngmi Jung
- Department of Biological Sciences, College of Natural Science, Pusan National University, Busan 46241, Republic of Korea
| | - Sun-Hee Leem
- Department of Biomedical Sciences, College of Natural Science and Department of Health Sciences, The Graduate School of Dong-A University, Busan 49315, Republic of Korea
| | - Young Rok Seo
- Institute of Environmental Medicine, Department of Life Science, Dongguk University Biomedi Campus, Goyang 10326, Republic of Korea
| | - Su Hyun Hong
- Basic Research Laboratory for the Regulation of Microplastic-Mediated Diseases, Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47340, Republic of Korea
| | - Gi-Young Kim
- Laboratory of Immunobiology, Department of Marine Life Sciences, Jeju National University, Jeju 63243, Republic of Korea
| | - Jin Won Hyun
- Department of Biochemistry, College of Medicine, and Jeju Research Center for Natural Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Yung Hyun Choi
- Basic Research Laboratory for the Regulation of Microplastic-Mediated Diseases, Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47340, Republic of Korea
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Park C, Cha HJ, Hwangbo H, Bang E, Kim HS, Yun SJ, Moon SK, Kim WJ, Kim GY, Lee SO, Shim JH, Choi YH. Activation of Heme Oxygenase-1 by Mangiferin in Human Retinal Pigment Epithelial Cells Contributes to Blocking Oxidative Damage. Biomol Ther (Seoul) 2024:biomolther.2023.175. [PMID: 38586992 DOI: 10.4062/biomolther.2023.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 11/04/2023] [Accepted: 11/07/2023] [Indexed: 04/09/2024] Open
Abstract
Mangiferin is a kind of natural xanthone glycosides and is known to have various pharmacological activities. However, since the beneficial efficacy of this compound has not been reported in retinal pigment epithelial (RPE) cells, this study aimed to evaluate whether mangiferin could protect human RPE ARPE-19 cells from oxidative injury mimicked by hydrogen peroxide (H2O2). The results showed that mangiferin attenuated H2O2-induced cell viability reduction and DNA damage, while inhibiting reactive oxygen species (ROS) production and preserving diminished glutathione (GSH). Mangiferin also antagonized H2O2-induced inhibition of the expression and activity of antioxidant enzymes such as manganese superoxide dismutase and GSH peroxidase, which was associated with inhibition of mitochondrial ROS production. In addition, mangiferin protected ARPE-19 cells from H2O2-induced apoptosis by increasing the Bcl-2/Bax ratio, decreasing caspase-3 activation, and blocking poly(ADP-ribose) polymerase cleavage. Moreover, mangiferin suppressed the release of cytochrome c into the cytosol, which was achieved by interfering with mitochondrial membrane disruption. Furthermore, mangiferin increased the expression and activity of heme oxygenase-1 (HO-1) and nuclear factor-erythroid-2 related factor 2 (Nrf2). However, the inhibition of ROS production, cytoprotective and anti-apoptotic effects of mangiferin were significantly attenuated by the HO-1 inhibitor, indicating that mangiferin promoted Nrf2-mediated HO-1 activity to prevent ARPE-19 cells from oxidative injury. The results of this study suggest that mangiferin, as an Nrf2 activator, has potent ROS scavenging activity and may have the potential to protect oxidative stress-mediated ocular diseases.
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Affiliation(s)
- Cheol Park
- Division of Basic Sciences, College of Liberal Studies, Dong-eui University, Busan 47340, Republic of Korea
| | - Hee-Jae Cha
- Department of Parasitology and Genetics, Kosin University College of Medicine, Busan 49104, Republic of Korea
| | - Hyun Hwangbo
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47227, Republic of Korea
| | - EunJin Bang
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47227, Republic of Korea
| | - Heui-Soo Kim
- Department of Biological Sciences, College of Natural Sciences, Pusan National University, Busan 46241, Republic of Korea
| | - Seok Joong Yun
- Department of Urology, Chungbuk National University College of Medicine, Cheongju 28644, Republic of Korea
| | - Sung-Kwon Moon
- Department of Food and Nutrition, Chung-Ang University, Ansung 17546, Republic of Korea
| | - Wun-Jae Kim
- Department of Urology, Chungbuk National University College of Medicine, Cheongju 28644, Republic of Korea
- Institute of Urotech, Cheongju 28120, Republic of Korea
| | - Gi-Young Kim
- Department of Marine Life Sciences, Jeju National University, Jeju 63243, Republic of Korea
| | - Seung-On Lee
- Department of Biomedicine, Health & Life Convergence Sciences, BK21 Four, College of Pharmacy, Mokpo National University, Muan 58554, Republic of Korea
| | - Jung-Hyun Shim
- Department of Biomedicine, Health & Life Convergence Sciences, BK21 Four, College of Pharmacy, Mokpo National University, Muan 58554, Republic of Korea
- The China-US (Henan) Hormel Cancer Institute, Zhengzhou, Henan 450008, China
| | - Yung Hyun Choi
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47227, Republic of Korea
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Bang E, Hwangbo H, Kim MY, Ji SY, Kim DH, Shim JH, Moon SK, Kim GY, Cheong J, Choi YH. Urban aerosol particulate matter promotes mitochondrial oxidative stress-induced cellular senescence in human retinal pigment epithelial ARPE-19 cells. Environ Toxicol Pharmacol 2023; 102:104211. [PMID: 37423393 DOI: 10.1016/j.etap.2023.104211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 06/27/2023] [Accepted: 07/03/2023] [Indexed: 07/11/2023]
Abstract
Environmental exposure to urban particulate matter (UPM) is a serious health concern worldwide. Although several studies have linked UPM to ocular diseases, no study has reported effects of UPM exposure on senescence in retinal cells. Therefore, this study aimed to investigate the effects of UPM on senescence and regulatory signaling in human retinal pigment epithelial ARPE-19 cells. Our study demonstrated that UPM significantly promoted senescence, with increased senescence-associated β-galactosidase activity. Moreover, both mRNA and protein levels of senescence markers (p16 and p21) and the senescence-associated secretory phenotype, including IL-1β, matrix metalloproteinase-1, and -3 were upregulated. Notably, UPM increased mitochondrial reactive oxygen species-dependent nuclear factor-kappa B (NF-κB) activation during senescence. In contrast, use of NF-κB inhibitor Bay 11-7082 reduced the level of senescence markers. Taken together, our results provide the first in vitro preliminary evidence that UPM induces senescence by promoting mitochondrial oxidative stress-mediated NF-κB activation in ARPE-19 cells.
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Affiliation(s)
- EunJin Bang
- Anti-Aging Research Center, Dong-eui University, Busan 47227, Republic of Korea; Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Republic of Korea
| | - Hyun Hwangbo
- Anti-Aging Research Center, Dong-eui University, Busan 47227, Republic of Korea; Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Republic of Korea
| | - Min Yeong Kim
- Anti-Aging Research Center, Dong-eui University, Busan 47227, Republic of Korea; Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Republic of Korea
| | - Seon Yeong Ji
- Anti-Aging Research Center, Dong-eui University, Busan 47227, Republic of Korea; Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Republic of Korea
| | - Da Hye Kim
- Anti-Aging Research Center, Dong-eui University, Busan 47227, Republic of Korea; Department of Molecular Biology, Pusan National University, Busan 46241, Republic of Korea
| | - Jung-Hyun Shim
- Department of Pharmacy, College of Pharmacy, Mokpo National University, Muan 58554, Republic of Korea
| | - Sung-Kwon Moon
- Department of Food and Nutrition, Chung-Ang University, Ansung 17546, Republic of Korea
| | - Gi-Young Kim
- Department of Marine Life Science, Jeju National University, Jeju 63243, Republic of Korea
| | - Jaehun Cheong
- Department of Molecular Biology, Pusan National University, Busan 46241, Republic of Korea
| | - Yung Hyun Choi
- Anti-Aging Research Center, Dong-eui University, Busan 47227, Republic of Korea; Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Republic of Korea.
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Park C, Cha HJ, Hwangbo H, Bang E, Hong SH, Song KS, Noh JS, Kim DH, Kim GY, Choi YH. β-Asarone Alleviates High-Glucose-Induced Oxidative Damage via Inhibition of ROS Generation and Inactivation of the NF-κB/NLRP3 Inflammasome Pathway in Human Retinal Pigment Epithelial Cells. Antioxidants (Basel) 2023; 12:1410. [PMID: 37507949 PMCID: PMC10376195 DOI: 10.3390/antiox12071410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/06/2023] [Accepted: 07/07/2023] [Indexed: 07/30/2023] Open
Abstract
Diabetic retinopathy (DR) is the leading cause of vision loss and a major complication of diabetes. Hyperglycemia-induced accumulation of reactive oxygen species (ROS) is an important risk factor for DR. β-asarone, a major component of volatile oil extracted from Acori graminei Rhizoma, exerts antioxidant effects; however, its efficacy in DR remains unknown. In this study, we investigated whether β-asarone inhibits high-glucose (HG)-induced oxidative damage in human retinal pigment epithelial (RPE) ARPE-19 cells. We found that β-asarone significantly alleviated cytotoxicity, apoptosis, and DNA damage in HG-treated ARPE-19 cells via scavenging of ROS generation. β-Asarone also significantly attenuated the excessive accumulation of lactate dehydrogenase and mitochondrial ROS by increasing the manganese superoxide dismutase and glutathione activities. HG conditions markedly increased the release of interleukin (IL)-1β and IL-18 and upregulated their protein expression and activation of the nuclear factor-kappa B (NF-κB) signaling pathway, whereas β-asarone reversed these effects. Moreover, expression levels of the NOD-like receptor family pyrin domain-containing 3 (NLRP3) inflammasome multiprotein complex molecules, including thioredoxin-interacting protein, NLRP3, apoptosis-associated speck-like protein containing a caspase-recruitment domain, and cysteinyl aspartate-specific proteinase-1, were increased in ARPE-19 cells under HG conditions. However, their expression levels remained similar to those in the control group in the presence of β-asarone. Therefore, β-asarone protects RPE cells from HG-induced injury by blocking ROS generation and NF-κB/NLRP3 inflammasome activation, indicating its potential as a therapeutic agent for DR treatment.
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Affiliation(s)
- Cheol Park
- Department Division of Basic Sciences, College of Liberal Studies, Dong-eui University, Busan 47340, Republic of Korea
| | - Hee-Jae Cha
- Department of Parasitology and Genetics, College of Medicine, Kosin University, Busan 49104, Republic of Korea
| | - Hyun Hwangbo
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea
| | - EunJin Bang
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea
| | - Su Hyun Hong
- Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47340, Republic of Korea
| | - Kyoung Seob Song
- Department of Medical Life Science, College of Medicine, Kosin University, Busan 49104, Republic of Korea
| | - Jeong Sook Noh
- Department of Food Science & Nutrition, Tongmyong University, Busan 48520, Republic of Korea
| | - Do-Hyung Kim
- Department of Aquatic Life Medicine, College of Fisheries Sciences, Pukyong National University, Busan 48513, Republic of Korea
| | - Gi-Young Kim
- Department of Marine Life Science, Jeju National University, Jeju 63243, Republic of Korea
| | - Yung Hyun Choi
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47340, Republic of Korea
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Bang E, Park C, Hwangbo H, Shim JH, Leem SH, Hyun JW, Kim GY, Choi YH. Spermidine Attenuates High Glucose-Induced Oxidative Damage in Retinal Pigment Epithelial Cells by Inhibiting Production of ROS and NF-κB/NLRP3 Inflammasome Pathway. Int J Mol Sci 2023; 24:10550. [PMID: 37445726 DOI: 10.3390/ijms241310550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 06/19/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023] Open
Abstract
Diabetic retinopathy (DR) is the leading cause of vision loss and a critical complication of diabetes with a very complex etiology. The build-up of reactive oxygen species (ROS) due to hyperglycemia is recognized as a primary risk factor for DR. Although spermidine, a naturally occurring polyamine, has been reported to have antioxidant effects, its effectiveness in DR has not yet been examined. Therefore, in this study, we investigated whether spermidine could inhibit high glucose (HG)-promoted oxidative stress in human retinal pigment epithelial (RPE) cells. The results demonstrated that spermidine notably attenuated cytotoxicity and apoptosis in HG-treated RPE ARPE-19 cells, which was related to the inhibition of mitochondrial ROS production. Under HG conditions, interleukin (IL)-1β and IL-18's release levels were markedly increased, coupled with nuclear factor kappa B (NF-κB) signaling activation. However, spermidine counteracted the HG-induced effects. Moreover, the expression of nucleotide-binding oligomerization domain-like receptor (NLR) protein 3 (NLRP3) inflammasome multiprotein complex molecules, including TXNIP, NLRP3, ASC, and caspase-1, increased in hyperglycemic ARPE-19 cells, but spermidine reversed these molecular changes. Collectively, our findings demonstrate that spermidine can protect RPE cells from HG-caused injury by reducing ROS and NF-κB/NLRP3 inflammasome pathway activation, indicating that spermidine could be a potential therapeutic compound for DR treatment.
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Affiliation(s)
- EunJin Bang
- Anti-Aging Research Center and Core-Facility Center for Tissue Regeneration, Dong-Eui University, Busan 47340, Republic of Korea
| | - Cheol Park
- Department Division of Basic Sciences, College of Liberal Studies, Dong-Eui University, Busan 47340, Republic of Korea
| | - Hyun Hwangbo
- Anti-Aging Research Center and Core-Facility Center for Tissue Regeneration, Dong-Eui University, Busan 47340, Republic of Korea
| | - Jung-Hyun Shim
- Department of Pharmacy, College of Pharmacy, Mokpo National University, Jeonnam 58554, Republic of Korea
- Department Biomedicine, Health & Life Convergence Sciences, BK21 Four, College of Pharmacy, Mokpo National University, Muan 58554, Republic of Korea
| | - Sun-Hee Leem
- Department of Biomedical Sciences, Dong-A University, Busan 49315, Republic of Korea
- Department of Health Sciences, The Graduated of Dong-A University, Busan 49315, Republic of Korea
| | - Jin Won Hyun
- Department of Biochemistry, College of Medicine, Jeju National University, Jeju 63243, Republic of Korea
- Jeju Research Center for Natural Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Gi-Young Kim
- Department of Marine Life Sciences, Jeju National University, Jeju 63243, Republic of Korea
| | - Yung Hyun Choi
- Anti-Aging Research Center and Core-Facility Center for Tissue Regeneration, Dong-Eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-Eui University, Busan 47227, Republic of Korea
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Kim MY, Bang E, Hwangbo H, Ji SY, Kim DH, Lee H, Park C, Hong SH, Kim GY, Choi YH. Diallyl trisulfide inhibits monosodium urate-induced NLRP3 inflammasome activation via NOX3/4-dependent mitochondrial oxidative stress in RAW 264.7 and bone marrow-derived macrophages. Phytomedicine 2023; 112:154705. [PMID: 36796188 DOI: 10.1016/j.phymed.2023.154705] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 12/27/2022] [Accepted: 02/02/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Monosodium urate (MSU) crystals are associated with gouty inflammatory diseases. MSU-associated inflammation is majorly triggered by NOD-like receptor protein 3 (NLRP3) inflammasome that promotes interleukin (IL)-1β secretion. Although diallyl trisulfide (DATS) is well-known polysulfide garlic compounds with anti-inflammatory effects, its action in MSU-induced inflammasome activation has not been known yet. PURPOSE The objective of the current study was to investigate anti-inflammasome effects and mechanisms of DATS in RAW 264.7 and bone marrow-derived macrophages (BMDM). METHODS The concentrations of IL-1β were analyzed with enzyme-linked immunosorbent assay. The MSU-induced mitochondrial damage and reactive oxygen species (ROS) production were detected by fluorescence microscope and flow cytometry. The protein expressions of NLRP3 signaling molecules, NADPH oxidase (NOX) 3/4 were assessed with Western blotting. RESULTS DATS suppressed MSU-induced IL-1β and caspase-1 accompanied by decreased inflammasome complex formation in RAW 264.7 and BMDM. In addition, DATS restored mitochondrial damage. DATS downregulated NOX 3/4 that were upregulated by MSU as predicted by gene microarray and confirmed by Western blotting. CONCLUSION This study first reports mechanistic finding that DATS alleviates MSU-induced NLRP3 inflammasome by mediating NOX3/4-dependent mitochondrial ROS production in macrophages in vitro and ex vivo, suggesting DATS could be effective therapeutic candidate for gouty inflammatory condition.
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Affiliation(s)
- Min Yeong Kim
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea; Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Republic of Korea
| | - EunJin Bang
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea; Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Republic of Korea; Department of Convergence Medicine, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea; Division of Basic Sciences, College of Liberal Studies, Dong-eui University, Busan 47340, Republic of Korea; Department of Marine Life Science, Jeju National University, Jeju 63243, Republic of Korea; Core-Facility Center for Tissue Regeneration, Dong-eui University, Busan 47340, Republic of Korea
| | - Hyun Hwangbo
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea; Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Republic of Korea
| | - Seon Yeong Ji
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea; Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Republic of Korea
| | - Da Hye Kim
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea; Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Republic of Korea
| | - Hyesook Lee
- Department of Convergence Medicine, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea
| | - Cheol Park
- Division of Basic Sciences, College of Liberal Studies, Dong-eui University, Busan 47340, Republic of Korea
| | - Su Hyun Hong
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Republic of Korea
| | - Gi-Young Kim
- Department of Marine Life Science, Jeju National University, Jeju 63243, Republic of Korea.
| | - Yung Hyun Choi
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea; Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Republic of Korea; Core-Facility Center for Tissue Regeneration, Dong-eui University, Busan 47340, Republic of Korea.
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Park C, Cha HJ, Hwangbo H, Ji SY, Kim DH, Kim MY, Bang E, Hong SH, Kim SO, Jeong SJ, Lee H, Moon SK, Shim JH, Kim GY, Cho S, Choi YH. Phloroglucinol Inhibits Oxidative-Stress-Induced Cytotoxicity in C2C12 Murine Myoblasts through Nrf-2-Mediated Activation of HO-1. Int J Mol Sci 2023; 24:4637. [PMID: 36902068 PMCID: PMC10003575 DOI: 10.3390/ijms24054637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 02/22/2023] [Accepted: 02/24/2023] [Indexed: 03/04/2023] Open
Abstract
Phloroglucinol is a class of polyphenolic compounds containing aromatic phenyl rings and is known to have various pharmacological activities. Recently, we reported that this compound isolated from Ecklonia cava, a brown alga belonging to the family Laminariaceae, has potent antioxidant activity in human dermal keratinocytes. In this study, we evaluated whether phloroglucinol could protect against hydrogen peroxide (H2O2)-induced oxidative damage in murine-derived C2C12 myoblasts. Our results revealed that phloroglucinol suppressed H2O2-induced cytotoxicity and DNA damage while blocking the production of reactive oxygen species. We also found that phloroglucinol protected cells from the induction of apoptosis associated with mitochondrial impairment caused by H2O2 treatment. Furthermore, phloroglucinol enhanced the phosphorylation of nuclear factor-erythroid-2 related factor 2 (Nrf2) as well as the expression and activity of heme oxygenase-1 (HO-1). However, such anti-apoptotic and cytoprotective effects of phloroglucinol were greatly abolished by the HO-1 inhibitor, suggesting that phloroglucinol could increase the Nrf2-mediated activity of HO-1 to protect C2C12 myoblasts from oxidative stress. Taken together, our results indicate that phloroglucinol has a strong antioxidant activity as an Nrf2 activator and may have therapeutic benefits for oxidative-stress-mediated muscle disease.
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Affiliation(s)
- Cheol Park
- Division of Basic Sciences, College of Liberal Studies, Dong-eui University, Busan 47340, Republic of Korea
| | - Hee-Jae Cha
- Department of Parasitology and Genetics, College of Medicine, Kosin University, Busan 49267, Republic of Korea
| | - Hyun Hwangbo
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47227, Republic of Korea
| | - Seon Yeong Ji
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47227, Republic of Korea
| | - Da Hye Kim
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47227, Republic of Korea
| | - Min Yeong Kim
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47227, Republic of Korea
| | - EunJin Bang
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47227, Republic of Korea
| | - Su Hyun Hong
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47227, Republic of Korea
| | - Sung Ok Kim
- Department of Food and Nutrition, College of Life and Health, Kyungsung University, Busan 48434, Republic of Korea
| | - Soon-Jeong Jeong
- Department of Dental Hygiene & Institute of Basic Science for Well-Aging, Youngsan University, Yangsan 50510, Republic of Korea
| | - Hyesook Lee
- Department of Convergence Medicine, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea
| | - Sung-Kwon Moon
- Department of Food and Nutrition, College of Biotechnology & Natural Resource, Chung-Ang University, Ansung 17546, Republic of Korea
| | - Jung-Hyun Shim
- Department of Pharmacy, College of Pharmacy, Mokpo National University, Muan 58554, Republic of Korea
| | - Gi-Young Kim
- Department of Marine Life Science, College of Ocean Sciences, Jeju National University, Jeju 63243, Republic of Korea
| | - Suengmok Cho
- Department of Food Science and Technology, Institute of Food Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Yung Hyun Choi
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47227, Republic of Korea
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Park C, Cha HJ, Kim DH, Kwon CY, Park SH, Hong SH, Bang E, Cheong J, Kim GY, Choi YH. Fisetin Protects C2C12 Mouse Myoblasts from Oxidative Stress-Induced Cytotoxicity through Regulation of the Nrf2/HO-1 Signaling. J Microbiol Biotechnol 2023; 33:591-599. [PMID: 36859395 DOI: 10.4014/jmb.2212.12042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/10/2023] [Accepted: 01/13/2023] [Indexed: 03/03/2023]
Abstract
Fisetin is a bioactive flavonol molecule and has been shown to have antioxidant potential, but its efficacy has not been fully validated. The aim of the present study was to investigate the protective efficacy of fisetin on C2C12 murine myoblastjdusts under hydrogen peroxide (H2O2)-induced oxidative damage. The results revealed that fisetin significantly weakened H2O2-induced cell viability inhibition and DNA damage while blocking reactive oxygen species (ROS) generation. Fisetin also significantly alleviated cell cycle arrest by H2O2 treatment through by reversing the upregulation of p21WAF1/CIP1 expression and the downregulation of cyclin A and B levels. In addition, fisetin significantly blocked apoptosis induced by H2O2 through increasing the Bcl-2/Bax ratio and attenuating mitochondrial damage, which was accompanied by inactivation of caspase-3 and suppression of poly(ADP-ribose) polymerase cleavage. Furthermore, fisetin-induced nuclear translocation and phosphorylation of Nrf2 were related to the increased expression and activation of heme oxygenase-1 (HO-1) in H2O2-stimulated C2C12 myoblasts. However, the protective efficacy of fisetin on H2O2-mediated cytotoxicity, including cell cycle arrest, apoptosis and mitochondrial dysfunction, were greatly offset when HO-1 activity was artificially inhibited. Therefore, our results indicate that fisetin as an Nrf2 activator effectively abrogated oxidative stress-mediated damage in C2C12 myoblasts.
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Affiliation(s)
- Cheol Park
- Division of Basic Sciences, College of Liberal Studies, Dong-eui University, Busan 47340, Republic of Korea
| | - Hee-Jae Cha
- Department of Parasitology and Genetics, Kosin University College of Medicine, Busan 49267, Republic of Korea
| | - Da Hye Kim
- Anti-Aging Research Center and Core-Facility Center for Tissue Regeneration, Dong-eui University, Busan 47340, Republic of Korea.,Department of Molecular Biology, Pusan National University, Busan 46241, Republic of Korea
| | - Chan-Young Kwon
- Department of Oriental Neuropsychiatry, Dong-eui University College of Korean Medicine, Busan 47227, Republic of Korea
| | - Shin-Hyung Park
- Department of Pathology, Dong-eui University College of Korean Medicine, Busan 47227, Republic of Korea
| | - Su Hyun Hong
- Anti-Aging Research Center and Core-Facility Center for Tissue Regeneration, Dong-eui University, Busan 47340, Republic of Korea.,Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47227, Republic of Korea
| | - EunJin Bang
- Anti-Aging Research Center and Core-Facility Center for Tissue Regeneration, Dong-eui University, Busan 47340, Republic of Korea.,Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47227, Republic of Korea
| | - Jaehun Cheong
- Department of Molecular Biology, Pusan National University, Busan 46241, Republic of Korea
| | - Gi-Young Kim
- Department of Marine Life Science, Jeju National University, Jeju 63243, Republic of Korea
| | - Yung Hyun Choi
- Anti-Aging Research Center and Core-Facility Center for Tissue Regeneration, Dong-eui University, Busan 47340, Republic of Korea.,Department of Biochemistry, College of Korean Medicine, Dong-eui University, Busan 47227, Republic of Korea
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Park C, Cha HJ, Kim MY, Bang E, Moon SK, Yun SJ, Kim WJ, Noh JS, Kim GY, Cho S, Lee H, Choi YH. Phloroglucinol Attenuates DNA Damage and Apoptosis Induced by Oxidative Stress in Human Retinal Pigment Epithelium ARPE-19 Cells by Blocking the Production of Mitochondrial ROS. Antioxidants (Basel) 2022; 11:antiox11122353. [PMID: 36552561 PMCID: PMC9774705 DOI: 10.3390/antiox11122353] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/19/2022] [Accepted: 11/25/2022] [Indexed: 11/29/2022] Open
Abstract
Phloroglucinol, a phenolic compound, is known to possess a potent antioxidant ability. However, its role in retinal cells susceptible to oxidative stress has not been well elucidated yet. Thus, the objective of this study was to evaluate whether phloroglucinol could protect against oxidative damage in cultured human retinal pigment epithelium ARPE-19 cells. For this purpose, ARPE-19 cells were stimula ted with hydrogen peroxide (H2O2) to mimic oxidative stress. Cell viability, cytotoxicity, apoptosis, reactive oxygen species (ROS) generation, mitochondrial function, DNA damage, and autophagy were then assessed. Our results revealed that phloroglucinol ameliorated cell viability, cytotoxicity, and DNA damage in H2O2-exposued ARPE-19 cells and blocked production of ROS. Phloroglucinol also counteracted H2O2-induced apoptosis by reducing Bax/Bcl-2 ratio, blocking activation of caspase-3, and inhibiting degradation of poly (ADP-ribose) polymerase. H2O2 caused mitochondrial impairment and increased expression levels of mitophagy markers such as PINK1and PARKIN known to be associated with mitochondrial ROS (mtROS) generation and cytosolic release of cytochrome c. However, these changes were significantly attenuated by phloroglucinol. Mito-TEMPO, a selective mitochondrial antioxidant, further enhanced the protective effect of phloroglucinol against dysfunctional mitochondria. Furthermore, H2O2 induced autophagy, but not when ARPE-19 cells were pretreated with phloroglucinol, meaning that autophagy by H2O2 contributed to the pro-survival mechanism and that phloroglucinol protected ARPE-19 cells from apoptosis by blocking autophagy. Taken together, these results suggest that phloroglucinol can inhibit oxidative stress-induced ARPE-19 cell damage and dysfunction by protecting DNA damage, autophagy, and subsequent apoptosis through mitigation of mtROS generation. Thus, phloroglucinol might have therapeutic potential to prevent oxidative stress-mediated damage in RPE cells.
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Affiliation(s)
- Cheol Park
- Division of Basic Sciences, College of Liberal Studies, Dong-Eui University, Busan 47340, Republic of Korea
| | - Hee-Jae Cha
- Department of Parasitology and Genetics, Kosin University College of Medicine, Busan 49267, Republic of Korea
| | - Min Yeong Kim
- Anti-Aging Research Center, Dong-Eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-Eui University, Busan 47227, Republic of Korea
| | - EunJin Bang
- Anti-Aging Research Center, Dong-Eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-Eui University, Busan 47227, Republic of Korea
| | - Sung-Kwon Moon
- Department of Food and Nutrition, Chung-Ang University, Ansung 17546, Republic of Korea
| | - Seok Joong Yun
- Department of Urology, College of Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Wun-Jae Kim
- Department of Urology, College of Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Jeong Sook Noh
- Department of Food Science & Nutrition, Tongmyong University, Busan 48520, Republic of Korea
| | - Gi-Young Kim
- Department of Marine Life Science, Jeju National University, Jeju 63243, Republic of Korea
| | - Suengmok Cho
- Department of Food Science and Technology, Institute of Food Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Hyesook Lee
- Department of Convergence Medicine, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea
- Correspondence: (H.L.); (Y.H.C.); Tel.: +82-51-890-8129 (H.L.); +82-51-890-3319 (Y.H.C.)
| | - Yung Hyun Choi
- Anti-Aging Research Center, Dong-Eui University, Busan 47340, Republic of Korea
- Department of Biochemistry, College of Korean Medicine, Dong-Eui University, Busan 47227, Republic of Korea
- Correspondence: (H.L.); (Y.H.C.); Tel.: +82-51-890-8129 (H.L.); +82-51-890-3319 (Y.H.C.)
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Hong SH, Park C, Hwangbo H, Bang E, Kim SO, Shim JH, Park SH, Lee H, Leem SH, Kim GY, Choi YH. Activation of Heme Oxygenase-1 is Involved in the Preventive Effect of Honokiol against Oxidative Damage in Human Retinal Pigment Epithelial Cells. BIOTECHNOL BIOPROC E 2022. [DOI: 10.1007/s12257-022-0174-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Kim DH, Bang E, Ha S, Jung HJ, Choi YJ, Yu BP, Chung HY. Organ-differential Roles of Akt/FoxOs Axis as a Key Metabolic Modulator during Aging. Aging Dis 2021; 12:1713-1728. [PMID: 34631216 PMCID: PMC8460295 DOI: 10.14336/ad.2021.0225] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 02/25/2021] [Indexed: 12/11/2022] Open
Abstract
FoxOs and their post-translational modification by phosphorylation, acetylation, and methylation can affect epigenetic modifications and promote the expression of downstream target genes. Therefore, they ultimately affect cellular and biological functions during aging or occurrence of age-related diseases including cancer, diabetes, and kidney diseases. As known for its key role in aging, FoxOs play various biological roles in the aging process by regulating reactive oxygen species, lipid accumulation, and inflammation. FoxOs regulated by PI3K/Akt pathway modulate the expression of various target genes encoding MnSOD, catalases, PPARγ, and IL-1β during aging, which are associated with age-related diseases. This review highlights the age-dependent differential regulatory mechanism of Akt/FoxOs axis in metabolic and non-metabolic organs. We demonstrated that age-dependent suppression of Akt increases the activity of FoxOs (Akt/FoxOs axis upregulation) in metabolic organs such as liver and muscle. This Akt/FoxOs axis could be modulated and reversed by antiaging paradigm calorie restriction (CR). In contrast, hyperinsulinemia-mediated PI3K/Akt activation inhibited FoxOs activity (Akt/FoxOs axis downregulation) leading to decrease of antioxidant genes expression in non-metabolic organs such as kidneys and lungs during aging. These phenomena are reversed by CR. The results of studies on the process of aging and CR indicate that the Akt/FoxOs axis plays a critical role in regulating metabolic homeostasis, redox stress, and inflammation in various organs during aging process. The benefical actions of CR on the Akt/FoxOs axis in metabolic and non-metabolic organs provide further insights into the molecular mechanisms of organ-differential roles of Akt/FoxOs axis during aging.
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Affiliation(s)
- Dae Hyun Kim
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan 46241, Korea
| | - EunJin Bang
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan 46241, Korea
| | - Sugyeong Ha
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan 46241, Korea
| | - Hee Jin Jung
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan 46241, Korea
| | - Yeon Ja Choi
- 2Department of Biopharmaceutical Engineering, Division of Chemistry and Biotechnology, Dongguk University, Gyeongju 38066, Korea
| | - Byung Pal Yu
- 3Department of Physiology, The University of Texas Health Science Center at San Antonio, TX 78229, USA
| | - Hae Young Chung
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan 46241, Korea
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Bang E, Kim DH, Chung HY. Protease-activated receptor 2 induces ROS-mediated inflammation through Akt-mediated NF-κB and FoxO6 modulation during skin photoaging. Redox Biol 2021; 44:102022. [PMID: 34082382 PMCID: PMC8182111 DOI: 10.1016/j.redox.2021.102022] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/20/2021] [Accepted: 05/21/2021] [Indexed: 12/15/2022] Open
Abstract
Long-term exposure to ultraviolet irradiation to skin leads to deleterious intracellular effects, including reactive oxygen species (ROS) production and inflammatory responses, causing accelerated skin aging. Previous studies have demonstrated that increased expression and activation of protease-activated receptor 2 (PAR2) and Akt is observed in keratinocyte proliferation, suggesting their potential regulatory role in skin photoaging. However, the specific underlying molecular mechanism of PAR2 and the Akt/NF-κB/FoxO6-mediated signaling pathway is not clearly defined. In this study, we first used the UVB-irradiated photoaged skin of hairless mice and observed an increase in PAR2 and Gαq expression and PI3-kinase/Akt, NF-κB, and suppressed FoxO6. Consequently, increased levels of proinflammatory cytokines and decreased levels of antioxidant MnSOD was observed. Next, to investigate PAR2-specific roles in inflammation and oxidative stress, we used photoaged hairless mice topically applied with PAR2 antagonist GB83 and photoaged PAR2 knockout mice. PAR2 inhibition and deletion significantly suppressed inflammatory and oxidative stress levels, which were associated with decreased IL-6 and IL-1β levels and increased MnSOD levels, respectively. Furthermore, NF-κB phosphorylation and decreased FoxO6 was reduced by PAR2 inhibition and deletion in vivo. To confirm the in vivo results, we conducted PAR2 knockdown and overexpression in UVB-irradiated HaCaT cells. In PAR2 knockdown cells by si-PAR2 treatment, it suppressed Akt/NF-κB and increased FoxO6, whereas PAR2 overexpression reversed these effects and subsequently modulated proinflammatory target genes. Collectively, our data define that PAR2 induces oxidative stress and inflammation through Akt-mediated phosphorylation of NF-κB (Ser536) and FoxO6 (Ser184), which could be a critical upstream regulatory mechanism in ROS-mediated inflammatory response.
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Affiliation(s)
- EunJin Bang
- Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan, 46241, South Korea
| | - Dae Hyun Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan, 46241, South Korea.
| | - Hae Young Chung
- Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan, 46241, South Korea.
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Kim MJ, Kim DH, Bang E, Noh SG, Chun P, Yokozawa T, Moon HR, Chung HY. PPARα Agonist, MHY3200, Alleviates Renal Inflammation during Aging via Regulating ROS/Akt/FoxO1 Signaling. Molecules 2021; 26:3197. [PMID: 34073584 PMCID: PMC8198004 DOI: 10.3390/molecules26113197] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/11/2021] [Accepted: 05/14/2021] [Indexed: 12/01/2022] Open
Abstract
PPARα is a ligand-dependent transcription factor and its activation is known to play an important role in cell defense through anti-inflammatory and antioxidant effects. MHY3200 (2-[4-(5-chlorobenzo[d]thiazol-2-yl)phenoxy]-2,2-difluoroacetic acid), a novel benzothiazole-derived peroxisome proliferator-activated receptor α (PPARα) agonist, is a synthesized PPARα activator. This study examined the beneficial effects of MHY3200 on age-associated alterations in reactive oxygen species (ROS)/Akt/forkhead box (FoxO) 1 signaling in rat kidneys. Young (7-month-old) and old (22-month-old) rats were treated with MHY3200 (1 mg/kg body weight/day or 3 mg/kg body weight/day) for two weeks. MHY3200 treatment led to a notable decrease in triglyceride and insulin levels in serum from old rats. The elevated kidney ROS level, serum insulin level, and Akt phosphorylation in old rats were reduced following MHY3200 treatment; moreover, FoxO1 phosphorylation increased. MHY3200 treatment led to the increased level of FoxO1 and its target gene, MnSOD. MHY3200 suppressed cyclooxygenase-2 expression by activating PPARα and inhibiting the activation of nuclear factor-κB (NF-κB) in the kidneys of old rats. Our results suggest that MHY3200 ameliorates age-associated renal inflammation by regulating NF-κB and FoxO1 via ROS/Akt signaling.
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Affiliation(s)
- Min Jo Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Geumjeong-gu, Busan 46241, Korea; (M.J.K.); (D.H.K.); (E.B.)
| | - Dae Hyun Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Geumjeong-gu, Busan 46241, Korea; (M.J.K.); (D.H.K.); (E.B.)
| | - EunJin Bang
- Department of Pharmacy, College of Pharmacy, Pusan National University, Geumjeong-gu, Busan 46241, Korea; (M.J.K.); (D.H.K.); (E.B.)
| | - Sang Gyun Noh
- Interdisciplinary Research Programme of Bioinformatics and Longevity Science, Department of Pharmacy, College of Pharmacy, Pusan National University, Geumjeong-gu, Busan 46241, Korea;
| | - Pusoon Chun
- College of Pharmacy, Inje University, Gimhae 50834, Gyeongsangnam-do, Korea;
| | - Takako Yokozawa
- Graduate School Science and Engineering for Research, University of Toyama, Toyama 930-8555, Japan;
| | - Hyung Ryong Moon
- Department of Pharmacy, College of Pharmacy, Pusan National University, Geumjeong-gu, Busan 46241, Korea; (M.J.K.); (D.H.K.); (E.B.)
| | - Hae Young Chung
- Department of Pharmacy, College of Pharmacy, Pusan National University, Geumjeong-gu, Busan 46241, Korea; (M.J.K.); (D.H.K.); (E.B.)
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Kim DH, Kim YR, Bang E, Ha S, Noh SG, Kim BM, Jeong SH, Jung HJ, Lee JY, Chung HY. Mechanism of Lipid Accumulation through PAR2 Signaling in Diabetic Male Mice. Endocrinol Metab (Seoul) 2021; 36:171-184. [PMID: 33677938 PMCID: PMC7937841 DOI: 10.3803/enm.2020.850] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 01/04/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Protease-activated protein-2 (PAR2) has been reported to regulate hepatic insulin resistance condition in type 2 diabetes mice. However, the mechanism of lipid metabolism through PAR2 in obesity mice have not yet been examined. In liver, Forkhead box O1 (FoxO1) activity induces peroxisome proliferator-activated receptor γ (PPARγ), leading to accumulation of lipids and hyperlipidemia. Hyperlipidemia significantly influence hepatic steatoses, but the mechanisms underlying PAR2 signaling are complex and have not yet been elucidated. METHODS To examine the modulatory action of FoxO1 and its altered interaction with PPARγ, we utilized db/db mice and PAR2-knockout (KO) mice administered with high-fat diet (HFD). RESULTS Here, we demonstrated that PAR2 was overexpressed and regulated downstream gene expressions in db/db but not in db+ mice. The interaction between PAR2/β-arrestin and Akt was also greater in db/db mice. The Akt inhibition increased FoxO1 activity and subsequently PPARγ gene in the livers that led to hepatic lipid accumulation. Our data showed that FoxO1 was negatively controlled by Akt signaling and consequently, the activity of a major lipogenesis-associated transcription factors such as PPARγ increased, leading to hepatic lipid accumulation through the PAR2 pathway under hyperglycemic conditions in mice. Furthermore, the association between PPARγ and FoxO1 was increased in hepatic steatosis condition in db/db mice. However, HFD-fed PAR2-KO mice showed suppressed FoxO1-induced hepatic lipid accumulation compared with HFD-fed control groups. CONCLUSION Collectively, our results provide evidence that the interaction of FoxO1 with PPARγ promotes hepatic steatosis in mice. This might be due to defects in PAR2/β-arrestin-mediated Akt signaling in diabetic and HFD-fed mice.
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Affiliation(s)
- Dae Hyun Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan, Korea
| | - Ye Ra Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan, Korea
| | - EunJin Bang
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan, Korea
| | - Sugyeong Ha
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan, Korea
| | - Sang Gyun Noh
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan, Korea
| | - Byeong Moo Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan, Korea
| | - Seong Ho Jeong
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan, Korea
| | - Hee Jin Jung
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan, Korea
| | - Ji Young Lee
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan, Korea
| | - Hae Young Chung
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan, Korea
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Jung HJ, Kim SM, Kim DH, Bang E, Kang D, Lee S, Chun P, Moon HR, Chung HY. 2,4-Dihydroxyphenyl-benzo[d]thiazole (MHY553), a synthetic PPARα agonist, decreases age-associated inflammatory responses through PPARα activation and RS scavenging in the skin. Exp Gerontol 2020; 143:111153. [PMID: 33189833 DOI: 10.1016/j.exger.2020.111153] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 11/06/2020] [Accepted: 11/09/2020] [Indexed: 12/16/2022]
Abstract
We previously reported that 2,4-dihydroxyphenyl-benzo[d]thiazole (MHY553) is a PPARα agonist, which has been shown to inhibit tyrosinase activity in murine melanocyte and alleviate hepatic steatosis in aged rats. This study investigated the effects of MHY553 on the age-related occurrence of inflammatory responses via the molecular modulation of the nuclear factor-κB (NF-κB) signaling pathway in the skin of aged rats and skin fibroblast cells. Moreover, we investigated the antioxidant effect of MHY553 via in vitro assays of reactive oxygen species (ROS) and peroxynitrite (ONOO-) scavenging activities. We also scrutinized the ability of MHY553 as a PPARα activator in aged rat skin and H2O2-induced Hs27 fibroblast cells. In vivo experiments were performed in young, aged, and MHY553-fed aged rats (3 mg or 5 mg∙kg -1∙day -1 for 4 weeks). MHY553 dose-dependently scavenged ROS and ONOO-. Furthermore, we found that MHY553 suppressed the NF-κB transcription factor and downregulated mitogen-activated protein kinase (MAPK)/activator protein-1 (AP-1) signaling. MHY553 also inhibited the expression of pro-inflammatory cytokines including COX-2, iNOS, IL-1β, and IL-6. Our findings indicate the MHY553 scavenges ROS/reactive nitrogen species and inhibits inflammatory cytokines through PPARα activation in the skin. Thus, these results suggest that MHY553 may be of therapeutic interest for protecting skin from oxidative stress-induced damage and intrinsic aging.
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Affiliation(s)
- Hee Jin Jung
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Seong Min Kim
- Research Institute of Life Science and College of Veterinary Medicine, Gyeongsang National University, Jinju, Gyeongsang 52828, Republic of Korea
| | - Dae Hyun Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - EunJin Bang
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Dongwan Kang
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Sanggwon Lee
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Pusoon Chun
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and Research, Inje University, Gimhae 47392, Republic of Korea
| | - Hyung Ryong Moon
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea.
| | - Hae Young Chung
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea.
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Lee AK, Kim DH, Bang E, Choi YJ, Chung HY. β-Hydroxybutyrate Suppresses Lipid Accumulation in Aged Liver through GPR109A-mediated Signaling. Aging Dis 2020; 11:777-790. [PMID: 32765945 PMCID: PMC7390524 DOI: 10.14336/ad.2019.0926] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 09/26/2019] [Indexed: 12/15/2022] Open
Abstract
Dietary interventions such as prolonged calorie restriction (CR) and intermittent fasting provide health benefits including a reduction in the inflammatory burden and regulation of energy metabolism. During CR, β-hydroxybutyrate (BHB) level is elevated in the serum. BHB is a ligand of GPR109A, which inhibits lipolysis and exerts anti-inflammatory effects on cells. During aging, comorbidities related to dyslipidemia are significantly associated with fatty liver. However, the underlying mechanisms of BHB in hepatic ER stress and dyslipidemia are unclear and remain to be elucidated. Here, we used aged rats that were administered with BHB and compared the modulatory effects of BHB through the GPR109A/AMPK pathway on the hepatic endoplasmic reticulum (ER) stress and lipid accumulation to CR rats. BHB caused suppression of hepatic ER stress and lipid accumulation through GPR109A/AMPK pathway in the aged rats. Aged rats of both treatment groups showed reduced cAMP level and PKA phosphorylation. Furthermore, AMPK-Ser173 phosphorylation via PKA was decreased, whereas AMPK-Thr172 phosphorylation was increased by BHB and CR. Further supporting evidence was provided in HepG2 cells that BHB inhibited ER stress and lipid accumulation induced by palmitate. These results suggest that BHB activates GPR109A and regulates the activation of AMPK. These findings were further confirmed by GPR109A-siRNA transfection in vitro. In addition, BHB treatment elevated the protein levels of AMPK leading to significant inhibition of hepatic steatosis, whereas AMPK-siRNA treatment abolished these effects. Taken together, these findings suggest that BHB could be a effective molecule that mimics CR in ameliorating age-related hepatic lipid accumulation via GPR109A signaling pathway.
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Affiliation(s)
- A Kyoung Lee
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Korea
| | - Dae Hyun Kim
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Korea
| | - EunJin Bang
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Korea
| | - Yeon Ja Choi
- 2Department of Biopharmaceutical Engineering, Division of Chemistry and Biotechnology, Dongguk University, Gyeongju 38066, Korea
| | - Hae Young Chung
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Korea
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Kim DH, Bang E, Arulkumar R, Ha S, Chung KW, Park MH, Choi YJ, Yu BP, Chung HY. Senoinflammation: A major mediator underlying age-related metabolic dysregulation. Exp Gerontol 2020; 134:110891. [PMID: 32114077 DOI: 10.1016/j.exger.2020.110891] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/14/2020] [Accepted: 02/26/2020] [Indexed: 02/06/2023]
Abstract
Chronic inflammation is a complex and unresolved inflammatory response with low-grade multivariable patterns that aggravate systemic pathophysiological conditions and the aging process. To redefine and delineate these age-related complex inflammatory phenomena at the molecular, cellular, and systemic levels, the concept of "Senoinflammation" was recently formulated. In this review, we describe the accumulated data on both the multiphase systemic inflammatory process and the cellular proinflammatory signaling pathway. We also describe the proinflammatory mechanisms underlying the metabolic molecular pathways in aging. Additionally, we review age-related lipid accumulation, the role of the inflammatory senescence-associated secretory phenotype (SASP), the involvement of cytokine/chemokine secretion, endoplasmic reticulum (ER) stress, insulin resistance, and autophagy. The last section of the review highlights the modulation of the senoinflammatory process by the anti-aging and anti-inflammatory action of calorie restriction (CR). Evidence from aging and CR research strongly suggests that SASP from senescent cells may be the major source of secreted cytokines and chemokines during aging. A better understanding of the mechanisms underpinning the senoinflammatory response and the mitigating role of CR will provide insights into the molecular mechanisms of chronic inflammation and aging for potential interventions.
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Affiliation(s)
- Dae Hyun Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, 2, Busandaehak-ro 63beon-gi, Geumjeong-Gu, Busan 46241, Republic of Korea
| | - EunJin Bang
- Department of Pharmacy, College of Pharmacy, Pusan National University, 2, Busandaehak-ro 63beon-gi, Geumjeong-Gu, Busan 46241, Republic of Korea
| | - Radha Arulkumar
- Department of Pharmacy, College of Pharmacy, Pusan National University, 2, Busandaehak-ro 63beon-gi, Geumjeong-Gu, Busan 46241, Republic of Korea
| | - Sugyeong Ha
- Department of Pharmacy, College of Pharmacy, Pusan National University, 2, Busandaehak-ro 63beon-gi, Geumjeong-Gu, Busan 46241, Republic of Korea
| | - Ki Wung Chung
- Department of Pharmacy, College of Pharmacy, Pusan National University, 2, Busandaehak-ro 63beon-gi, Geumjeong-Gu, Busan 46241, Republic of Korea; Department of Pharmacy, College of Pharmacy, Kyungsung University, Nam-gu, Busan 48434, Republic of Korea
| | - Min Hi Park
- Department of Pharmacy, College of Pharmacy, Pusan National University, 2, Busandaehak-ro 63beon-gi, Geumjeong-Gu, Busan 46241, Republic of Korea
| | - Yeon Ja Choi
- Department of Biopharmaceutical Engineering, Division of Chemistry and Biotechnology, Dongguk University, Gyeongju 38066, Republic of Korea
| | - Byung Pal Yu
- Department of Physiology, The University of Texas Health Science Center at San Antonio, TX 78229, USA
| | - Hae Young Chung
- Department of Pharmacy, College of Pharmacy, Pusan National University, 2, Busandaehak-ro 63beon-gi, Geumjeong-Gu, Busan 46241, Republic of Korea.
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Bang E, Lee B, Noh SG, Kim DH, Jung HJ, Ha S, Yu BP, Chung HY. Modulation of senoinflammation by calorie restriction based on biochemical and Omics big data analysis. BMB Rep 2019. [PMID: 30545444 PMCID: PMC6386225 DOI: 10.5483/bmbrep.2019.52.1.301] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Aging is a complex and progressive process characterized by physiological and functional decline with time that increases susceptibility to diseases. Aged-related functional change is accompanied by a low-grade, unresolved chronic inflammation as a major underlying mechanism. In order to explain aging in the context of chronic inflammation, a new integrative concept on age-related chronic inflammation is necessary that encompasses much broader and wider characteristics of cells, tissues, organs, systems, and interactions between immune and non-immune cells, metabolic and non-metabolic organs. We have previously proposed a novel concept of senescent (seno)-inflammation and provided its frameworks. This review summarizes senoinflammation concept and additionally elaborates modulation of senoinflammation by calorie restriction (CR). Based on aging and CR studies and systems-biological analysis of Omics big data, we observed that senescence associated secretory phenotype (SASP) primarily composed of cytokines and chemokines was notably upregulated during aging whereas CR suppressed them. This result further strengthens the novel concept of senoinflammation in aging process. Collectively, such evidence of senoinflammation and modulatory role of CR provide insights into aging mechanism and potential interventions, thereby promoting healthy longevity. [BMB Reports 2019; 52(1): 56-63].
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Affiliation(s)
- EunJin Bang
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Korea
| | - Bonggi Lee
- Korean Medicine (KM)-Application Center, Korea Institute of Oriental Medicine (KIOM), Daegu 41062, Korea
| | - Sang-Gyun Noh
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Korea
| | - Dae Hyun Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Korea
| | - Hee Jin Jung
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Korea
| | - Sugyeong Ha
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Korea
| | - Byung Pal Yu
- Department of Physiology, The University of Texas Health Science Center at San Antonio, TX 78229, USA
| | - Hae Young Chung
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Korea
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Bang E, Lee EK, Noh S, Jung HJ, Moon KM, Park MH, Park YJ, Hyun MK, Lee AK, Kim SJ, Yang J, Park Y, Chun P, Moon HR, Chung HY. In vitro and in vivo evidence of tyrosinase inhibitory activity of a synthesized(Z)‐5‐(3‐hydroxy‐4‐methoxybenzylidene)‐2‐thioxothiazolidin‐4‐one (5‐HMT). Exp Dermatol 2019; 28:734-737. [DOI: 10.1111/exd.13863] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 11/29/2018] [Accepted: 12/03/2018] [Indexed: 11/29/2022]
Affiliation(s)
- EunJin Bang
- Molecular Inflammation Research Center for Aging Intervention (MRCA)College of PharmacyPusan National University Busan Korea
- College of PharmacyPusan National University Busan Korea
| | - Eun Kyeong Lee
- Molecular Inflammation Research Center for Aging Intervention (MRCA)College of PharmacyPusan National University Busan Korea
- Korea Institute of Toxicology Daejeon Korea
| | - Sang‐Gyun Noh
- Molecular Inflammation Research Center for Aging Intervention (MRCA)College of PharmacyPusan National University Busan Korea
| | - Hee Jin Jung
- Molecular Inflammation Research Center for Aging Intervention (MRCA)College of PharmacyPusan National University Busan Korea
| | - Kyoung Mi Moon
- Korean Medicine (KM)‐Application CenterKorea Institute of Oriental Medicine (KIOM) Daegu Korea
| | - Mi Hwa Park
- Pusan National University Hospital Biomedical Research Institute Busan Korea
| | - Yeo Jin Park
- College of PharmacyPusan National University Busan Korea
| | - Min Kyung Hyun
- College of PharmacyPusan National University Busan Korea
| | - A Kyoung Lee
- College of PharmacyPusan National University Busan Korea
| | - Su Jeong Kim
- Molecular Inflammation Research Center for Aging Intervention (MRCA)College of PharmacyPusan National University Busan Korea
| | - Jungho Yang
- Molecular Inflammation Research Center for Aging Intervention (MRCA)College of PharmacyPusan National University Busan Korea
| | - Yujin Park
- Molecular Inflammation Research Center for Aging Intervention (MRCA)College of PharmacyPusan National University Busan Korea
| | - Pusoon Chun
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and ResearchInje University Gimhae Gyeongnam Korea
| | - Hyung Ryong Moon
- Molecular Inflammation Research Center for Aging Intervention (MRCA)College of PharmacyPusan National University Busan Korea
- College of PharmacyPusan National University Busan Korea
| | - Hae Young Chung
- Molecular Inflammation Research Center for Aging Intervention (MRCA)College of PharmacyPusan National University Busan Korea
- College of PharmacyPusan National University Busan Korea
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Bang E, Lee B, Noh SG, Kim DH, Jung HJ, Ha S, Yu BP, Chung HY. Modulation of senoinflammation by calorie restriction based on biochemical and Omics big data analysis. BMB Rep 2019; 52:56-63. [PMID: 30545444 PMCID: PMC6386225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Indexed: 10/07/2023] Open
Abstract
Aging is a complex and progressive process characterized by physiological and functional decline with time that increases susceptibility to diseases. Aged-related functional change is accompanied by a low-grade, unresolved chronic inflammation as a major underlying mechanism. In order to explain aging in the context of chronic inflammation, a new integrative concept on age-related chronic inflammation is necessary that encompasses much broader and wider characteristics of cells, tissues, organs, systems, and interactions between immune and non-immune cells, metabolic and non-metabolic organs. We have previously proposed a novel concept of senescent (seno)-inflammation and provided its frameworks. This review summarizes senoinflammation concept and additionally elaborates modulation of senoinflammation by calorie restriction (CR). Based on aging and CR studies and systems-biological analysis of Omics big data, we observed that senescence associated secretory phenotype (SASP) primarily composed of cytokines and chemokines was notably upregulated during aging whereas CR suppressed them. This result further strengthens the novel concept of senoinflammation in aging process. Collectively, such evidence of senoinflammation and modulatory role of CR provide insights into aging mechanism and potential interventions, thereby promoting healthy longevity. [BMB Reports 2019; 52(1): 56-63].
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Affiliation(s)
- EunJin Bang
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241,
Korea
| | - Bonggi Lee
- Korean Medicine (KM)-Application Center, Korea Institute of Oriental Medicine (KIOM), Daegu 41062,
Korea
| | - Sang-Gyun Noh
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241,
Korea
| | - Dae Hyun Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241,
Korea
| | - Hee Jin Jung
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241,
Korea
| | - Sugyeong Ha
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241,
Korea
| | - Byung Pal Yu
- Department of Physiology, The University of Texas Health Science Center at San Antonio, TX 78229,
USA
| | - Hae Young Chung
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241,
Korea
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21
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Wang Y, Ho CC, Bang E, Rejon CA, Libasci V, Pertchenko P, Hébert TE, Bernard DJ. Bone morphogenetic protein 2 stimulates noncanonical SMAD2/3 signaling via the BMP type 1A receptor in gonadotrope-like cells: implications for FSH synthesis. Endocrinology 2014; 155:1970-81. [PMID: 24601881 DOI: 10.1210/en.2013-1741] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
FSH is an essential regulator of mammalian reproduction. Its synthesis by pituitary gonadotrope cells is regulated by multiple endocrine and paracrine factors, including TGFβ superfamily ligands, such as the activins and inhibins. Activins stimulate FSH synthesis via transcriptional regulation of its β-subunit gene (Fshb). More recently, bone morphogenetic proteins (BMPs) were shown to stimulate murine Fshb transcription alone and in synergy with activins. BMP2 signals via its canonical type I receptor, BMPR1A (or activin receptor-like kinase 3 [ALK3]), and SMAD1 and SMAD5 to stimulate transcription of inhibitor of DNA binding proteins. Inhibitor of DNA binding proteins then potentiate the actions of activin-stimulated SMAD3 to regulate the Fshb gene in the gonadotrope-like LβT2 cell line. Here, we report the unexpected observation that BMP2 also stimulates the SMAD2/3 pathway in these cells and that it does so directly via ALK3. Indeed, this novel, noncanonical ALK3 activity is completely independent of ALK4, ALK5, and ALK7, the type I receptors most often associated with SMAD2/3 pathway activation. Induction of the SMAD2/3 pathway by ALK3 is dependent upon its own previous activation by associated type II receptors, which phosphorylate conserved serine and threonine residues in the ALK3 juxtamembrane glycine-serine-rich domain. ALK3 signaling via SMAD3 is necessary for the receptor to stimulate Fshb transcription, whereas its activation of the SMAD1/5/8 pathway alone is insufficient. These data challenge current dogma that ALK3 and other BMP type I receptors signal via SMAD1, SMAD5, and SMAD8 and not SMAD2 or SMAD3. Moreover, they suggest that BMPs and activins may use similar intracellular signaling mechanisms to activate the murine Fshb promoter in immortalized gonadotrope-like cells.
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MESH Headings
- Activins/antagonists & inhibitors
- Activins/metabolism
- Animals
- Bone Morphogenetic Protein 2/agonists
- Bone Morphogenetic Protein 2/antagonists & inhibitors
- Bone Morphogenetic Protein 2/genetics
- Bone Morphogenetic Protein 2/metabolism
- Bone Morphogenetic Protein Receptors, Type I/agonists
- Bone Morphogenetic Protein Receptors, Type I/antagonists & inhibitors
- Bone Morphogenetic Protein Receptors, Type I/genetics
- Bone Morphogenetic Protein Receptors, Type I/metabolism
- Cell Line
- Follicle Stimulating Hormone, beta Subunit/biosynthesis
- Follicle Stimulating Hormone, beta Subunit/genetics
- Follicle Stimulating Hormone, beta Subunit/metabolism
- Gene Silencing
- Genes, Reporter
- Gonadotrophs/metabolism
- Humans
- Mice
- Phosphorylation
- Protein Processing, Post-Translational
- RNA, Small Interfering
- Recombinant Proteins/chemistry
- Recombinant Proteins/metabolism
- Signal Transduction
- Smad2 Protein/antagonists & inhibitors
- Smad2 Protein/genetics
- Smad2 Protein/metabolism
- Smad3 Protein/antagonists & inhibitors
- Smad3 Protein/genetics
- Smad3 Protein/metabolism
- Transcription, Genetic
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Affiliation(s)
- Ying Wang
- Departments of Pharmacology and Therapeutics (Y.W., C.C.H., E.B., C.A.R., V.L., P.P., T.E.H., D.J.B.), Oncology (C.A.R.), Obstetrics and Gynecology (D.J.B.), and Anatomy and Cell Biology (D.J.B.), McGill University, Montréal, Québec, Canada H3G 1Y6
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Kim SY, Woo DC, Bang E, Kim SS, Lim HS, Choe BY. Combined application of 2D correlated spectroscopy and 2D nuclear Overhauser enhancement spectroscopy to the brain metabolites. NEUROCHEM J+ 2014. [DOI: 10.1134/s1819712414010085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Vartanyants IA, Singer A, Mancuso AP, Yefanov OM, Sakdinawat A, Liu Y, Bang E, Williams GJ, Cadenazzi G, Abbey B, Sinn H, Attwood D, Nugent KA, Weckert E, Wang T, Zhu D, Wu B, Graves C, Scherz A, Turner JJ, Schlotter WF, Messerschmidt M, Lüning J, Acremann Y, Heimann P, Mancini DC, Joshi V, Krzywinski J, Soufli R, Fernandez-Perea M, Hau-Riege S, Peele AG, Feng Y, Krupin O, Moeller S, Wurth W. Coherence properties of individual femtosecond pulses of an x-ray free-electron laser. Phys Rev Lett 2011; 107:144801. [PMID: 22107200 DOI: 10.1103/physrevlett.107.144801] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Indexed: 05/31/2023]
Abstract
Measurements of the spatial and temporal coherence of single, femtosecond x-ray pulses generated by the first hard x-ray free-electron laser, the Linac Coherent Light Source, are presented. Single-shot measurements were performed at 780 eV x-ray photon energy using apertures containing double pinholes in "diffract-and-destroy" mode. We determined a coherence length of 17 μm in the vertical direction, which is approximately the size of the focused Linac Coherent Light Source beam in the same direction. The analysis of the diffraction patterns produced by the pinholes with the largest separation yields an estimate of the temporal coherence time of 0.55 fs. We find that the total degree of transverse coherence is 56% and that the x-ray pulses are adequately described by two transverse coherent modes in each direction. This leads us to the conclusion that 78% of the total power is contained in the dominant mode.
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Affiliation(s)
- I A Vartanyants
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany.
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Abstract
Histones, nuclear proteins that interact with DNA to form nucleosomes, are essential for both the regulation of transcription and the packaging of DNA within chromosomes. The N-terminal domain of histone H4 contains four acetylation sites at lysine residues and may play a separate role in chromatin structure from the remainder of the H4 chain. We performed circular dichroism and NMR characterization of both native (H4NTP) and acetylated (Ace-H4NTP) peptides containing N-terminal acetylation domain of histone H4 for various pH environments. Data from CD and NMR suggested that H4NTP exhibited a pH-dependent conformational change, whereas the Ace-H4NTP is insensitive to pH change. However, both peptides showed a defined structural form at acidic pH environments. The solution structure for Ace-H4NTP shows two structurally independent regions comprising residues of Leu10-Gly13 and Arg19-Leu22, demonstrating relatively well-defined turn-type structures. Our results suggest that N-terminal acetylated region of H4 prefers an extended backbone conformation at neutral pH, however, upon acetylation, the regions containing lysine residues induce structural transition, having defined structural form for its optimum function.
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Affiliation(s)
- E Bang
- Department of Chemistry, Yonsei University, Seoul, Korea
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26
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Hong E, Shin J, Bang E, Kim MH, Lee ST, Lee W. Complete sequence-specific 1H, 13C and 15N resonance assignments of the human PTK6 SH2 domain. J Biomol NMR 2001; 19:291-292. [PMID: 11330822 DOI: 10.1023/a:1011221125013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Abstract
Orexin-A and orexin-B (also called hypocretin-1 and hypocretin-2, respectively) are novel hypothalamic neuropeptides encoded by a single mRNA transcript; they stimulate food intake. We have determined the three-dimensional solution structure of human hypocretin-2/orexin-B using two-dimensional 1H-NMR data and dynamical simulated annealing calculations. On the basis of NOEs, 3JHNalpha coupling constants and hydrogen-deuterium exchange rates together with chemical shift indices, human hypocretin-2/orexin-B was deduced to consist of two alpha-helices connected with a short linker in both H2O and 30% trifluoroethanol solutions. The helical axis of helix I is oriented about 60-80 degrees relative to helix II. Hybrid distance geometry and simulated-annealing protocols were used to generate an ensemble of 30 structures with no constraint violations greater than 0.03 nm for distances and 3 degrees for angles. In addition, human hypocretin-2/orexin-B shares a similar secondary-structural motif with human neuropeptide Y. This result can form the basis for further study on ligand-receptor recognition of human orexin receptors.
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Affiliation(s)
- J H Lee
- Department of Biochemistry College of Science, Yonsei University, Seoul, Korea
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28
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Bang E, Kjaer I, Christensen LR. Etiologic aspects and orthodontic treatment of unilateral localized arrested tooth-development combined with hearing loss. Am J Orthod Dentofacial Orthop 1995; 108:154-61. [PMID: 7625389 DOI: 10.1016/s0889-5406(95)70078-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In this study a case has been presented involving localized, arrested maxillary tooth development, asymmetric maxillary development, and unilateral loss of hearing. No similar case seems to have been described before. The orthodontic treatment comprised extraction of four permanent tooth germs in the maxilla and autotransplantation of mandibular teeth, followed by the use of fixed orthodontic appliances and a one-unit bridge restoration. Etiologic aspects are discussed. It is suggested that a severe attack of mumps that involved massive swelling of the parotid glands immediately after chicken pox and measles at the age of 4 to 5 years, may have resulted in a neurologic reduction of hearing and arrested tooth development. The teeth in which root development in relation to mumps does not appear to have been reported previously, whereas hearing loss after mumps has been reported. In the search for verification of this possible connection, children with arrested tooth development should be examined for reduction of hearing, and children with hearing loss after mumps ought to have their dental development checked.
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Affiliation(s)
- E Bang
- Department of Orthodontics, School of Dentistry, University of Copenhagen, Denmark
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Richardson AK, Elwood JM, McNoe B, Bang E. A survey of urban and rural participants in the Otago-Southland pilot breast cancer screening programme. N Z Med J 1994; 107:36-8. [PMID: 8302502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
AIMS By surveying participants in a pilot breast cancer screening programme, to measure satisfaction with the screening service, to provide feedback for programme staff, to obtain an indication of future participation, and to collect information about costs to women. METHODS A self administered questionnaire was posted to representative samples of urban and rural women (total 474) who had participated in the Otago-Southland pilot breast cancer screening programme in its first year of operation. RESULTS There was a 93% response rate to the survey, after one reminder letter. Although some demographic characteristics of urban and rural women differed, their opinions about the screening programme were similar. Satisfaction with the service is extremely high, with 94% of respondents planning to participate again in two years. CONCLUSIONS The Otago-Southland pilot programme provides a service which is regarded as satisfactory by the great majority of participants.
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Affiliation(s)
- A K Richardson
- Department of Preventive and Social Medicine, University of Otago School of Medicine
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30
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Bang E, Eriksen J, Mønsted L, Mønsted O, Schroth W, Kondow AJ, Bisht KS, Parmar VS, Francis GW. Mechanism of Lactic Acid Formation Catalyzed by a Macrocyclic Chromium(III) Complex. A Comparison with the Glyoxalase I Enzyme. ACTA ACUST UNITED AC 1994. [DOI: 10.3891/acta.chem.scand.48-0012] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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31
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Bang E, Eriksen J, Glerup J, Mønsted L, Mønsted O, Weihe H. Structure, Magnetic Susceptibility, and EPR Spectra of a Dimeric Macrocyclic Chromium(III) Complex Bridged by a Single Carbonate Ligand. ACTA ACUST UNITED AC 1991. [DOI: 10.3891/acta.chem.scand.45-0367] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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32
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Bang E, Mønsted O, Jørgensen HC, Petersen A, Ohtaki H. Chromium(III) Complexes of Macrocyclic Tetraamine Ligands. Crystal Structures of cis-Dihydroxo-(rac-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane)chromium(III) Perchlorate Dihydrate and Di-cis-carbonato-(rac-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane)chromium(III) Dithionate Tetrahydrate. ACTA ACUST UNITED AC 1984. [DOI: 10.3891/acta.chem.scand.38a-0281] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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33
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Bang E, Mønsted O, Stølevik R, Vorren Ø, Bastiansen O, Braathen G, Fernholt L, Gundersen G, Nielsen CJ, Cyvin BN, Cyvin SJ. Chromium(III) Complexes of Macrocyclic Ligands. I. Crystal Structure of trans-Bis(O-carbamato)(1,4,8,11-tetraazacyclotetradecane)chromium(II) Perchlorate Sesquihydrate. ACTA ACUST UNITED AC 1982. [DOI: 10.3891/acta.chem.scand.36a-0353] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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