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Asthana P, Wong HLX. Preventing obesity, insulin resistance and type 2 diabetes by targeting MT1-MMP. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167081. [PMID: 38367902 DOI: 10.1016/j.bbadis.2024.167081] [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: 12/28/2023] [Revised: 02/08/2024] [Accepted: 02/12/2024] [Indexed: 02/19/2024]
Abstract
Obesity is one of the predominant risk factors for type 2 diabetes. Despite all the modern advances in medicine, an effective drug treatment for obesity without overt side effects has not yet been found. The discovery of growth and differentiation factor 15 (GDF15), an appetite-regulating hormone, created hopes for the treatment of obesity. However, an insufficient understanding of the physiological regulation of GDF15 has been a major obstacle to mitigating GDF15-centric treatment of obesity. Our recent studies revealed how a series of proteolytic events predominantly mediated by membrane-type 1 matrix metalloproteinase (MT1-MMP/MMP14), a key cell-surface metalloproteinase involved in extracellular remodeling, contribute to the pathogenesis of metabolic disorders, including obesity and diabetes. The MT1-MMP-mediated cleavage of the GDNF family receptor-α-like (GFRAL), a key neuronal receptor of GDF15, controls the satiety center in the hindbrain, thereby regulating non-homeostatic appetite and bodyweight changes. Furthermore, increased activation of MT1-MMP does not only lead to increased risk of obesity, but also causes age-associated insulin resistance by cleaving Insulin Receptor in major metabolic tissues. Importantly, inhibition of MT1-MMP effectively protects against obesity and diabetes, revealing the therapeutic potential of targeting MT1-MMP for the management of metabolic disorders.
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Affiliation(s)
- Pallavi Asthana
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong
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2
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Wang Y, Qiu H, Chen S, Li D, Zhao X, Guo M, Li N, Chen C, Qin M, Zhou Y, Xiao D, Zhao J, Xu L. MicroRNA-7 deficiency ameliorates d-galactose-induced aging in mice by regulating senescence of Kupffer cells. Aging Cell 2024:e14145. [PMID: 38494663 DOI: 10.1111/acel.14145] [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: 10/09/2023] [Revised: 02/05/2024] [Accepted: 03/01/2024] [Indexed: 03/19/2024] Open
Abstract
Aging is intricately linked to immune system dysfunction. Recent studies have highlighted the biological function of microRNA-7 (miR-7) as a novel regulator of immune cell function and related diseases. However, the potential role of miR-7 in aging remains unexplored. Here, we investigated the contribution of miR-7 to d-gal-induced aging in mice, focusing on its regulation of senescent Kupffer cells. Our findings revealed that miR-7 deficiency significantly ameliorated the aging process, characterized by enhanced CD4+ T-cell activation. However, the adoptive transfer of miR-7-deficient CD4+ T cells failed to improve the age-related phenotype. Further analysis showed that miR-7 deficiency significantly reduced IL-1β production in liver tissue, and inhibiting IL-1β in vivo slowed down the aging process in mice. Notably, IL-1β is mainly produced by senescent Kupffer cells in the liver tissue of aging mice, and miR-7 expression was significantly up-regulated in these cells. Mechanistically, KLF4, a target of miR-7, was down-regulated in senescent Kupffer cells in aging mouse model. Furthermore, miR-7 deficiency also modulated the NF-κB activation and IL-1β production in senescent Kupffer cells through KLF4. In conclusion, our findings unveil the role of miR-7 in d-gal-induced aging in mice, highlighting its regulation of KLF4/NF-κB/IL-1β pathways in senescent Kupffer cells. This research may enhance our understanding of miRNA-based aging immune cells and offer new avenues for new intervention strategies in aging process.
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Affiliation(s)
- Ya Wang
- Department of Immunology, Zunyi Medical University, Zunyi, Guizhou, China
- Key Laboratory of Gene Detection and Treatment of Guizhou Province, Zunyi, Guizhou, China
| | - Hui Qiu
- Department of Immunology, Zunyi Medical University, Zunyi, Guizhou, China
- Key Laboratory of Gene Detection and Treatment of Guizhou Province, Zunyi, Guizhou, China
| | - Shipeng Chen
- Department of Immunology, Zunyi Medical University, Zunyi, Guizhou, China
- Key Laboratory of Gene Detection and Treatment of Guizhou Province, Zunyi, Guizhou, China
| | - Dongmei Li
- Department of Immunology, Zunyi Medical University, Zunyi, Guizhou, China
- Key Laboratory of Gene Detection and Treatment of Guizhou Province, Zunyi, Guizhou, China
| | - Xu Zhao
- Key Laboratory of Gene Detection and Treatment of Guizhou Province, Zunyi, Guizhou, China
- School of Medicine, Guizhou University, Guiyang, Guizhou, China
| | - Mengmeng Guo
- Department of Immunology, Zunyi Medical University, Zunyi, Guizhou, China
- Key Laboratory of Gene Detection and Treatment of Guizhou Province, Zunyi, Guizhou, China
| | - Nana Li
- Key Laboratory of Gene Detection and Treatment of Guizhou Province, Zunyi, Guizhou, China
| | - Chao Chen
- Department of Immunology, Zunyi Medical University, Zunyi, Guizhou, China
- Key Laboratory of Gene Detection and Treatment of Guizhou Province, Zunyi, Guizhou, China
| | - Ming Qin
- Department of Immunology, Zunyi Medical University, Zunyi, Guizhou, China
- Key Laboratory of Gene Detection and Treatment of Guizhou Province, Zunyi, Guizhou, China
| | - Ya Zhou
- Department of Medical Physics, Zunyi Medical University, Zunyi, Guizhou, China
| | - Daimin Xiao
- Kweichow Moutai Hospital, Renhuai, Guizhou, China
| | - Juanjuan Zhao
- Department of Immunology, Zunyi Medical University, Zunyi, Guizhou, China
- Key Laboratory of Gene Detection and Treatment of Guizhou Province, Zunyi, Guizhou, China
| | - Lin Xu
- Department of Immunology, Zunyi Medical University, Zunyi, Guizhou, China
- Key Laboratory of Gene Detection and Treatment of Guizhou Province, Zunyi, Guizhou, China
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Kim DH, Lee S, Noh SG, Lee J, Chung HY. FoxO6-mediated ApoC3 upregulation promotes hepatic steatosis and hyperlipidemia in aged rats fed a high-fat diet. Aging (Albany NY) 2024; 16:4095-4115. [PMID: 38441531 DOI: 10.18632/aging.205610] [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: 07/31/2023] [Accepted: 01/24/2024] [Indexed: 03/22/2024]
Abstract
FoxO6, an identified factor, induces hyperlipidemia and hepatic steatosis during aging by activating hepatic lipoprotein secretion and lipogenesis leading to increased ApoC3 concentrations in the bloodstream. However, the intricate mechanisms underlying hepatic steatosis induced by elevated FoxO6 under hyperglycemic conditions remain intricate and require further elucidation. In order to delineate the regulatory pathway involving ApoC3 controlled by FoxO6 and its resultant functional impacts, we employed a spectrum of models including liver cell cultures, aged rats subjected to HFD, transgenic mice overexpressing FoxO6 (FoxO6-Tg), and FoxO6 knockout mice (FoxO6-KO). Our findings indicate that FoxO6 triggered ApoC3-driven lipid accumulation in the livers of aged rats on an HFD and in FoxO6-Tg, consequently leading to hepatic steatosis and hyperglycemia. Conversely, the absence of FoxO6 attenuated the expression of genes involved in lipogenesis, resulting in diminished hepatic lipid accumulation and mitigated hyperlipidemia in murine models. Additionally, the upregulation of FoxO6 due to elevated glucose levels led to increased ApoC3 expression, consequently instigating cellular triglyceride mediated lipid accumulation. The transcriptional activation of FoxO6 induced by both the HFD and high glucose levels resulted in hepatic steatosis by upregulating ApoC3 and genes associated with gluconeogenesis in aged rats and liver cell cultures. Our conclusions indicate that the upregulation of ApoC3 by FoxO6 promotes the development of hyperlipidemia, hyperglycemia, and hepatic steatosis in vivo, and in vitro. Taken together, our findings underscore the significance of FoxO6 in driving hyperlipidemia and hepatic steatosis specifically under hyperglycemic states by enhancing the expression of ApoC3 in aged rats.
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Affiliation(s)
- Dae Hyun Kim
- Department of Food Science and Technology, College of Natural Resources and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do 50463, Republic of Korea
| | - Seulah Lee
- Department of Pharmacy, Research Institute for Drug Development, College of Pharmacy, Pusan National University, Geumjeong-gu, Busan 46241, Republic of Korea
| | - Sang Gyun Noh
- Department of Pharmacy, Research Institute for Drug Development, College of Pharmacy, Pusan National University, Geumjeong-gu, Busan 46241, Republic of Korea
| | - Jaewon Lee
- Department of Pharmacy, Research Institute for Drug Development, College of Pharmacy, Pusan National University, Geumjeong-gu, Busan 46241, Republic of Korea
| | - Hae Young Chung
- Department of Pharmacy, Research Institute for Drug Development, College of Pharmacy, Pusan National University, Geumjeong-gu, Busan 46241, Republic of Korea
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Kim ME, Lee JS, Kim TW, Park MH, Kim DH. FoxO6-Mediated TXNIP Induces Lipid Accumulation in the Liver through NLRP3 Inflammasome Activation. Endocrinol Metab (Seoul) 2024; 39:127-139. [PMID: 38417829 PMCID: PMC10901662 DOI: 10.3803/enm.2023.1826] [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: 09/15/2023] [Revised: 11/02/2023] [Accepted: 11/13/2023] [Indexed: 03/01/2024] Open
Abstract
BACKGRUOUND Hepatic steatosis, which involves the excessive accumulation of lipid droplets in hepatocytes, presents a significant global health concern due to its association with obesity and metabolic disorders. Inflammation plays a crucial role in the progression of hepatic steatosis; however, the precise molecular mechanisms responsible for this process remain unknown. METHODS This study investigated the involvement of the nucleotide-binding oligomerization domain-like receptor pyrin domain-containing-3 (NLRP3) inflammasome and the forkhead box O6 (FoxO6) transcription factor in the pathogenesis of hepatic steatosis. We monitored the NLRP3 inflammasome and lipogenesis in mice overexpressing the constitutively active (CA)-FoxO6 allele and FoxO6-null mice. In an in vitro study, we administered palmitate to liver cells overexpressing CA-FoxO6 and measured changes in lipid metabolism. RESULTS We administered palmitate treatment to clarify the mechanisms through which FoxO6 activates cytokine interleukin (IL)-1β through the NLRP3 inflammasome. The initial experiments revealed that dephosphorylation led to palmitate-induced FoxO6 transcriptional activity. Further palmitate experiments showed increased expression of IL-1β and the hepatic NLRP3 inflammasome complex, including adaptor protein apoptotic speck protein containing a caspase recruitment domain (ASC) and pro-caspase-1. Furthermore, thioredoxin-interacting protein (TXNIP), a key regulator of cellular redox conditions upstream of the NLRP3 inflammasome, was induced by FoxO6 in the liver and HepG2 cells. CONCLUSION The findings of this study shed light on the molecular mechanisms underpinning the FoxO6-NLRP3 inflammasome axis in promoting inflammation and lipid accumulation in the liver.
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Affiliation(s)
- Mi Eun Kim
- Department of Life Sciences, Chosun University College of Natural Science, Gwangju, Korea
| | - Jun Sik Lee
- Department of Life Sciences, Chosun University College of Natural Science, Gwangju, Korea
| | - Tae Won Kim
- Department of Pharmacy, Kyungsung University College of Pharmacy, Busan, Korea
| | - Min Hi Park
- Department of Pharmacy, Kyungsung University College of Pharmacy, Busan, Korea
| | - Dae Hyun Kim
- Department of Food Science & Technology, Pusan National University College of Natural Resources and Life Science, Miryang, Korea
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Gadre A, Dyson T, Lai J, Aguh C. Increased IL-1β in stratum corneum as a marker of inflammation among central centrifugal cicatricial alopecia patients with pruritus: An observational study. JAAD Int 2023; 13:195-197. [PMID: 37965352 PMCID: PMC10641221 DOI: 10.1016/j.jdin.2023.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2023] Open
Affiliation(s)
- Aditi Gadre
- The Johns Hopkins University School of Medicine, Baltimore, Maryland
- Georgetown University School of Medicine, Washington, District of Columbia
| | - Taylor Dyson
- The Johns Hopkins University School of Medicine, Baltimore, Maryland
- Eastern Virginia Medical School, Richmond, Virginia
| | - Jonathan Lai
- The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Crystal Aguh
- The Johns Hopkins University School of Medicine, Baltimore, Maryland
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Groeger M, Matsuo K, Heidary Arash E, Pereira A, Le Guillou D, Pino C, Telles-Silva KA, Maher JJ, Hsiao EC, Willenbring H. Modeling and therapeutic targeting of inflammation-induced hepatic insulin resistance using human iPSC-derived hepatocytes and macrophages. Nat Commun 2023; 14:3902. [PMID: 37400454 PMCID: PMC10318012 DOI: 10.1038/s41467-023-39311-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] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 06/07/2023] [Indexed: 07/05/2023] Open
Abstract
Hepatic insulin resistance is recognized as a driver of type 2 diabetes and fatty liver disease but specific therapies are lacking. Here we explore the potential of human induced pluripotent stem cells (iPSCs) for modeling hepatic insulin resistance in vitro, with a focus on resolving the controversy about the impact of inflammation in the absence of steatosis. For this, we establish the complex insulin signaling cascade and the multiple inter-dependent functions constituting hepatic glucose metabolism in iPSC-derived hepatocytes (iPSC-Heps). Co-culture of these insulin-sensitive iPSC-Heps with isogenic iPSC-derived pro-inflammatory macrophages induces glucose output by preventing insulin from inhibiting gluconeogenesis and glycogenolysis and activating glycolysis. Screening identifies TNFα and IL1β as the mediators of insulin resistance in iPSC-Heps. Neutralizing these cytokines together restores insulin sensitivity in iPSC-Heps more effectively than individual inhibition, reflecting specific effects on insulin signaling and glucose metabolism mediated by NF-κB or JNK. These results show that inflammation is sufficient to induce hepatic insulin resistance and establish a human iPSC-based in vitro model to mechanistically dissect and therapeutically target this metabolic disease driver.
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Affiliation(s)
- Marko Groeger
- Division of Transplant Surgery, Department of Surgery, University of California San Francisco, San Francisco, CA, 94143, USA
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California San Francisco, San Francisco, CA, 94143, USA
| | - Koji Matsuo
- Division of Endocrinology and Metabolism, Department of Medicine, University of California San Francisco, San Francisco, CA, 94143, USA
- Institute for Human Genetics, University of California San Francisco, San Francisco, CA, 94143, USA
| | - Emad Heidary Arash
- Division of Transplant Surgery, Department of Surgery, University of California San Francisco, San Francisco, CA, 94143, USA
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California San Francisco, San Francisco, CA, 94143, USA
| | - Ashley Pereira
- Division of Endocrinology and Metabolism, Department of Medicine, University of California San Francisco, San Francisco, CA, 94143, USA
- Institute for Human Genetics, University of California San Francisco, San Francisco, CA, 94143, USA
| | - Dounia Le Guillou
- Division of Gastroenterology, Department of Medicine, University of California San Francisco, San Francisco, CA, 94143, USA
- Liver Center, University of California San Francisco, San Francisco, CA, 94143, USA
| | - Cindy Pino
- Liver Center, University of California San Francisco, San Francisco, CA, 94143, USA
- Genomics CoLab, University of California San Francisco, San Francisco, CA, 94143, USA
| | - Kayque A Telles-Silva
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California San Francisco, San Francisco, CA, 94143, USA
- Human Genome and Stem Cell Research Center, University of Sao Paulo, 05508-090, Sao Paulo, Brazil
| | - Jacquelyn J Maher
- Division of Gastroenterology, Department of Medicine, University of California San Francisco, San Francisco, CA, 94143, USA
- Liver Center, University of California San Francisco, San Francisco, CA, 94143, USA
| | - Edward C Hsiao
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California San Francisco, San Francisco, CA, 94143, USA
- Division of Endocrinology and Metabolism, Department of Medicine, University of California San Francisco, San Francisco, CA, 94143, USA
- Institute for Human Genetics, University of California San Francisco, San Francisco, CA, 94143, USA
| | - Holger Willenbring
- Division of Transplant Surgery, Department of Surgery, University of California San Francisco, San Francisco, CA, 94143, USA.
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California San Francisco, San Francisco, CA, 94143, USA.
- Liver Center, University of California San Francisco, San Francisco, CA, 94143, USA.
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Wang G, Hong X, Yu J, Zhang Y, Li Y, Li Z, Zhu Z, Yuan S, Zhang X, Wang S, Zhu F, Wang Y, Wu C, Su P, Shen T. Enhancing de novo ceramide synthesis induced by bisphenol A exposure aggravates metabolic derangement during obesity. Mol Metab 2023; 73:101741. [PMID: 37225016 PMCID: PMC10250932 DOI: 10.1016/j.molmet.2023.101741] [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: 04/06/2023] [Accepted: 05/16/2023] [Indexed: 05/26/2023] Open
Abstract
OBJECTIVE Exposure to bisphenol A (BPA) has been shown to increase the prevalence of obesity and its related insulin resistance (IR). Ceramide is a sphingolipid known to facilitate the production of proinflammatory cytokines and subsequently exacerbate inflammation and IR during the progression of obesity. Here, we investigated the effects of BPA exposure on ceramide de novo synthesis and whether increased ceramides aggravate adipose tissue (AT) inflammation and obesity-related IR. METHODS A population-based case-control study was conducted to explore the relationship between BPA exposure and IR and the potential role of ceramide in AT in obesity. Next, we used mice reared on a normal chow diet (NCD) or a high-fat diet (HFD) to verify the results from the population study and then investigated the role of ceramides in low-level BPA exposure with HFD-induced IR and AT inflammation in mice treated with or without myriocin (an inhibitor of the rate-limiting enzyme in de novo ceramide synthesis). RESULTS BPA levels are higher in obese individuals and are significantly associated with AT inflammation and IR. Specific subtypes of ceramides mediated the associations between BPA and obesity, obesity-related IR and AT inflammation in the obesity group. In animal experiments, BPA exposure facilitated ceramide accumulation in AT, activated PKCζ, promoted AT inflammation, increased the expression and secretion of proinflammatory cytokines via the JNK/NF-κB pathway, and lowered insulin sensitivity by disrupting IRS1-PI3K-AKT signaling in mice fed a HFD. Myriocin suppressed BPA-induced AT inflammation and IR. CONCLUSION These findings indicate that BPA aggravates obesity-induced IR, which is partly via increased de novo synthesis of ceramides and subsequent promotion of AT inflammation. Ceramide synthesis could be a potential target for the prevention of environmental BPA exposure-related metabolic diseases.
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Affiliation(s)
- Gengfu Wang
- School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Xu Hong
- School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Jia Yu
- School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Yuheng Zhang
- School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Yuting Li
- School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Zuo Li
- School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Zhiyuan Zhu
- School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Shaoyun Yuan
- School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Xiaofei Zhang
- School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Sheng Wang
- Center for Scientific Research of Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Fuhai Zhu
- Second Affiliated Hospital, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Yong Wang
- Second Affiliated Hospital, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Changhao Wu
- Department of Biochemistry and Physiology, Faculty of Heath & Medical Sciences, University of Surrey, Surrey, Guildford, UK.
| | - Puyu Su
- School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China.
| | - Tong Shen
- School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China.
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Cao G, Lin M, Gu W, Su Z, Duan Y, Song W, Liu H, Zhang F. The rules and regulatory mechanisms of FOXO3 on inflammation, metabolism, cell death and aging in hosts. Life Sci 2023:121877. [PMID: 37352918 DOI: 10.1016/j.lfs.2023.121877] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 06/15/2023] [Accepted: 06/20/2023] [Indexed: 06/25/2023]
Abstract
The FOX family of transcription factors was originally identified in 1989, comprising the FOXA to FOXS subfamilies. FOXO3, a well-known member of the FOXO subfamily, is widely expressed in various human organs and tissues, with higher expression levels in the ovary, skeletal muscle, heart, and spleen. The biological effects of FOXO3 are mostly determined by its phosphorylation, which occurs in the nucleus or cytoplasm. Phosphorylation of FOXO3 in the nucleus can promote its translocation into the cytoplasm and inhibit its transcriptional activity. In contrast, phosphorylation of FOXO3 in the cytoplasm leads to its translocation into the nucleus and exerts regulatory effects on biological processes, such as inflammation, aerobic glycolysis, autophagy, apoptosis, oxidative stress, cell cycle arrest and DNA damage repair. Additionally, FOXO3 isoform 2 acts as an important suppressor of osteoclast differentiation. FOXO3 can also interfere with the development of various diseases, including inhibiting the proliferation and invasion of tumor cells, blocking the production of inflammatory factors in autoimmune diseases, and inhibiting β-amyloid deposition in Alzheimer's disease. Furthermore, FOXO3 slows down the aging process and exerts anti-aging effects by delaying telomere attrition, promoting cell self-renewal, and maintaining genomic stability. This review suggests that changes in the levels and post-translational modifications of FOXO3 protein can maintain organismal homeostasis and improve age-related diseases, thus counteracting aging. Moreover, this may indicate that alterations in FOXO3 protein levels are also crucial for longevity, offering new perspectives for therapeutic strategies targeting FOXO3.
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Affiliation(s)
- Guoding Cao
- Wu Lien-Teh Institute, Department of Microbiology, Harbin Medical University, Heilongjiang Key Laboratory of Immunity and Infection, Harbin 150081, China
| | - Monan Lin
- Wu Lien-Teh Institute, Department of Microbiology, Harbin Medical University, Heilongjiang Key Laboratory of Immunity and Infection, Harbin 150081, China
| | - Wei Gu
- Wu Lien-Teh Institute, Department of Microbiology, Harbin Medical University, Heilongjiang Key Laboratory of Immunity and Infection, Harbin 150081, China
| | - Zaiyu Su
- Wu Lien-Teh Institute, Department of Microbiology, Harbin Medical University, Heilongjiang Key Laboratory of Immunity and Infection, Harbin 150081, China
| | - Yagan Duan
- Wu Lien-Teh Institute, Department of Microbiology, Harbin Medical University, Heilongjiang Key Laboratory of Immunity and Infection, Harbin 150081, China
| | - Wuqi Song
- Wu Lien-Teh Institute, Department of Microbiology, Harbin Medical University, Heilongjiang Key Laboratory of Immunity and Infection, Harbin 150081, China
| | - Hailiang Liu
- Wu Lien-Teh Institute, Department of Microbiology, Harbin Medical University, Heilongjiang Key Laboratory of Immunity and Infection, Harbin 150081, China.
| | - Fengmin Zhang
- Wu Lien-Teh Institute, Department of Microbiology, Harbin Medical University, Heilongjiang Key Laboratory of Immunity and Infection, Harbin 150081, China.
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Tang R, Ren Y, Zhang Y, Yin M, Ren X, Zhu Q, Gao C, Zhang W, Liu G, Liu B. Glucose-driven transformable complex eliminates biofilm and alleviates inflamm-aging for diabetic periodontitis therapy. Mater Today Bio 2023; 20:100678. [PMID: 37293313 PMCID: PMC10244695 DOI: 10.1016/j.mtbio.2023.100678] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 05/15/2023] [Accepted: 05/19/2023] [Indexed: 06/10/2023] Open
Abstract
Diabetic periodontitis is a major complication of diabetes, which has a deep involvement in teeth loss and more serious systematic diseases, including Alzheimer's disease, atherosclerosis and cancers. Diabetic periodontitis is difficult to treat because of recalcitrant infection and hyperglycemia-induced tissue dysfunction. Current treatments fail to completely eliminate infection due to the diffusion-reaction inhibition of biofilm, and ignore the tissue dysfunction. Here, we design a glucose-driven transformable complex, composed of calcium alginate (CaAlg) hydrogel shell and Zeolitic imidazolate framework-8 (ZIF-8) core encapsulating Glucose oxidase (GOx)/Catalase (CAT) and Minocycline (MINO), named as CaAlg@MINO/GOx/CAT/ZIF-8 (CMGCZ). The reaction product of glucose-scavenging, gluconic acid, could dissolve ZIF-8 core and transform CMGCZ from inflexible to flexible, facilitating the complex to overcome the diffusion-reaction inhibition of biofilm. Meanwhile, reduced glucose concentration could ameliorate the pyroptosis of macrophages to decrease the secretion of pro-inflammatory factors, thereby reducing inflamm-aging to alleviate periodontal dysfunction.
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10
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Niero M, Bartoli G, De Colle P, Scarcella M, Zanetti M. Impact of Dietary Fiber on Inflammation and Insulin Resistance in Older Patients: A Narrative Review. Nutrients 2023; 15:nu15102365. [PMID: 37242248 DOI: 10.3390/nu15102365] [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: 04/19/2023] [Revised: 05/11/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
The beneficial impact of dietary fiber on the prevention and management of several chronic conditions associated with aging, including diabetes, neurodegenerative, cardiovascular diseases, and cancer, is well-known. High fiber intake has been associated with reduced inflammatory mediators counteracting the low-grade chronic inflammation typical of older age. In addition, dietary fiber improves postprandial glucose response and insulin resistance. In contrast, during acute diseases, its effects on insulin resistance and modulation of immune response are unclear. The aim of this narrative is to summarize the evidence for the potential impact of dietary fiber on inflammation and insulin resistance in older adults, with a particular focus on those acutely ill. Available evidence suggests that dietary fiber has the potential to counteract acute inflammation and to improve metabolic health. In addition, modulation of gut microbiota composition may contribute to improved immune function, particularly in the setting of aging-associated dysbiosis. This phenomenon has relevant implications in those acutely ill, in whom dysbiosis can be exacerbated. Our review leads to the conclusion that dietary interventions based on fiber manipulation could exploit its beneficial effects on inflammation and insulin resistance, if conducted from a precision nutrition perspective. This could also be true for the acutely ill patient, even though strong evidence is lacking.
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Affiliation(s)
- Michele Niero
- Geriatric Clinic, Maggiore Hospital, Azienda Sanitaria Universitaria Giuliano Isontina, 34148 Trieste, Italy
- Department of Medical Sciences, University of Trieste, 34127 Trieste, Italy
| | - Giulio Bartoli
- Geriatric Clinic, Maggiore Hospital, Azienda Sanitaria Universitaria Giuliano Isontina, 34148 Trieste, Italy
| | - Paolo De Colle
- Geriatric Clinic, Maggiore Hospital, Azienda Sanitaria Universitaria Giuliano Isontina, 34148 Trieste, Italy
| | - Marialaura Scarcella
- Anesthesia, Intensive Care and Nutritional Science, Azienda Ospedaliera "Santa Maria", Via Tristano di Joannuccio, 05100 Terni, Italy
| | - Michela Zanetti
- Geriatric Clinic, Maggiore Hospital, Azienda Sanitaria Universitaria Giuliano Isontina, 34148 Trieste, Italy
- Department of Medical Sciences, University of Trieste, 34127 Trieste, Italy
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Yang T, Wang Y, Cao X, Peng Y, Huang J, Chen L, Pang J, Jiang Z, Qian S, Liu Y, Ying C, Wang T, Zhang F, Lu Q, Yin X. Targeting mTOR/YY1 signaling pathway by quercetin through CYP7A1-mediated cholesterol-to-bile acids conversion alleviated type 2 diabetes mellitus induced hepatic lipid accumulation. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 113:154703. [PMID: 36889164 DOI: 10.1016/j.phymed.2023.154703] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 12/31/2022] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Hepatic lipid accumulation was a major promoter for the further development of non-alcoholic fatty liver disease (NAFLD) in type 2 diabetes (T2DM). mTOR/YY1 signaling pathway regulated many metabolic processes in different organs, and played an important role in hepatic lipid metabolism. Thus, targeting mTOR/YY1 signaling pathway might be a novel therapeutic strategy of T2DM-associated NALFD. PURPOSE To investigate the effects and the mechanism of quercetin against T2DM-associated NAFLD. STUDY DESIGN AND METHODS The combine abilities of 24 flavonoid compounds with mTOR were detected by computer virtual screening (VS) and molecular modeling. mTOR/YY1 signaling pathway was examined in the liver of db/db mice, and high glucose (HG) and free fatty acid (FFA) co-cultured HepG2 cells. YY1 overexpression lentivirus vector and mTOR specific inhibitor rapamycin were used to further identify the indispensable role of mTOR/YY1 signaling pathway in quercetin's amelioration effect of hepatic lipid accumulation in vitro. Clinical studies, luciferase assay and chromatin immunoprecipitation (ChIP) assay were all carried out to investigate the potential mechanisms by which quercetin exerted its amelioration effect of hepatic lipid accumulation. RESULTS Quercetin had the strongest ability to combine with mTOR and could competitively occupy its binding pocked. Along with the alleviated hepatic injury by quercetin, mTOR/YY1 signaling pathway was down-regulated in vivo and in vitro. However, the alleviation effect of quercetin against hepatic lipid accumulation was inhibited by YY1 overexpression in vitro. Mechanistically, the down-regulated nuclear YY1 induced by quercetin directly bound to CYP7A1 promoter and activated its transcription, resulting in the restoration of cholesterol homeostasis via the conversion of cholesterol-to-bile acids (BAs). CONCLUSION The hepatoprotective effect of quercetin on T2DM-associated NAFLD was linked to the restoration of cholesterol homeostasis by the conversion of cholesterol-to-BAs via down-regulating mTOR/YY1 signaling pathway, leading to the increased CYP7A1 activity.
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Affiliation(s)
- Tingting Yang
- Department of Clinical Pharmacology, School of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, NO. 209. Tongshan Road, Xuzhou, Jiangsu 221004, China
| | - Yiying Wang
- Department of Clinical Pharmacology, School of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, NO. 209. Tongshan Road, Xuzhou, Jiangsu 221004, China
| | - Xinyun Cao
- Department of Clinical Pharmacology, School of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, NO. 209. Tongshan Road, Xuzhou, Jiangsu 221004, China
| | - Yuting Peng
- Department of Clinical Pharmacology, School of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, NO. 209. Tongshan Road, Xuzhou, Jiangsu 221004, China
| | - Jiawan Huang
- Department of Clinical Pharmacology, School of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, NO. 209. Tongshan Road, Xuzhou, Jiangsu 221004, China
| | - Li Chen
- Department of Clinical Pharmacology, School of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, NO. 209. Tongshan Road, Xuzhou, Jiangsu 221004, China
| | - Jiale Pang
- Department of Clinical Pharmacology, School of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, NO. 209. Tongshan Road, Xuzhou, Jiangsu 221004, China
| | - Zhenzhou Jiang
- New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing 210009, China
| | - Sitong Qian
- Department of Clinical Pharmacology, School of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, NO. 209. Tongshan Road, Xuzhou, Jiangsu 221004, China
| | - Ying Liu
- Department of Clinical Pharmacology, School of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, NO. 209. Tongshan Road, Xuzhou, Jiangsu 221004, China
| | - Changjiang Ying
- Department of Endocrinology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221006, China
| | - Tao Wang
- Department of Pharmacy, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221006, China
| | - Fan Zhang
- Department of Pharmacy, Xuzhou Central Hospital, Xuzhou 221009, China
| | - Qian Lu
- Department of Clinical Pharmacology, School of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, NO. 209. Tongshan Road, Xuzhou, Jiangsu 221004, China
| | - Xiaoxing Yin
- Department of Clinical Pharmacology, School of Pharmacy, Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, NO. 209. Tongshan Road, Xuzhou, Jiangsu 221004, China.
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12
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Reches G, Blondheim Shraga NR, Carrette F, Malka A, Saleev N, Gubbay Y, Ertracht O, Haviv I, Bradley LM, Levine F, Piran R. Resolving the conflicts around Par2 opposing roles in regeneration by comparing immune-mediated and toxic-induced injuries. Inflamm Regen 2022; 42:52. [PMID: 36447218 PMCID: PMC9706915 DOI: 10.1186/s41232-022-00238-2] [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: 02/06/2022] [Accepted: 11/09/2022] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Different factors may lead to hepatitis. Among which are liver inflammation and poisoning. We chose two hepatitis models, typical for these two underlying causes. Thus, we aimed to characterize the role of protease-activated receptor 2 (Par2) in liver regeneration and inflammation to reconcile Par2 conflicting role in many damage models, which sometimes aggravates the induced damage and sometimes alleviates it. METHODS WT and knockout (Par2KO) mice were injected with concanavalin A (ConA) to induce immune-mediated hepatitis or with carbon tetrachloride (CCl4) to elicit direct hepatic damage. To distinguish the immune component from the liver regenerative response, we conducted bone marrow (BM) replacements of WT and Par2KO mice and repeated the damage models. RESULTS ConA injection caused limited damage in Par2KO mice livers, while in the WT mice severe damage followed by leukocyte infiltration was evident. Reciprocal BM replacement of WT and Par2KO showed that WT BM-reconstituted Par2KO mice displayed marked liver damage, while in Par2KO BM-reconstituted WT mice, the tissue was generally protected. In the CCl4 direct damage model, hepatocytes regenerated in WT mice, whereas Par2KO mice failed to recover. Reciprocal BM replacement did not show significant differences in hepatic regeneration. In Par2KO mice, hepatitis was more apparent, while WT recovered regardless of the BM origin. CONCLUSIONS We conclude that Par2 activation in the immune system aggravates hepatitis and that Par2 activation in the damaged tissue promotes liver regeneration. When we incorporate this finding and revisit the literature reports, we reconciled the conflicts surrounding Par2's role in injury, recovery, and inflammation.
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Affiliation(s)
- Gal Reches
- grid.22098.310000 0004 1937 0503The Azrieli Faculty of Medicine, Bar-Ilan University, 8 Henrietta Szold St, Safed, Israel
| | - Netta R. Blondheim Shraga
- grid.22098.310000 0004 1937 0503The Azrieli Faculty of Medicine, Bar-Ilan University, 8 Henrietta Szold St, Safed, Israel
| | - Florent Carrette
- grid.479509.60000 0001 0163 8573Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Assaf Malka
- grid.22098.310000 0004 1937 0503The Azrieli Faculty of Medicine, Bar-Ilan University, 8 Henrietta Szold St, Safed, Israel
| | - Natalia Saleev
- grid.22098.310000 0004 1937 0503The Azrieli Faculty of Medicine, Bar-Ilan University, 8 Henrietta Szold St, Safed, Israel
| | - Yehuda Gubbay
- grid.22098.310000 0004 1937 0503The Azrieli Faculty of Medicine, Bar-Ilan University, 8 Henrietta Szold St, Safed, Israel
| | - Offir Ertracht
- grid.415839.2Eliachar Research Laboratory, Galilee Medical Center, Nahariya, Israel
| | - Izhak Haviv
- grid.22098.310000 0004 1937 0503The Azrieli Faculty of Medicine, Bar-Ilan University, 8 Henrietta Szold St, Safed, Israel
| | - Linda M. Bradley
- grid.479509.60000 0001 0163 8573Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Fred Levine
- grid.479509.60000 0001 0163 8573Sanford Children’s Health Research Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 N Torrey Pines Rd, La Jolla, CA 92037 USA
| | - Ron Piran
- grid.22098.310000 0004 1937 0503The Azrieli Faculty of Medicine, Bar-Ilan University, 8 Henrietta Szold St, Safed, Israel
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Zhu M, Ling X, Zhou S, Meng P, Chen Q, Chen S, Shen K, Xie C, Kong Y, Wang M, Zhou L. KYA1797K, a Novel Small Molecule Destabilizing β-Catenin, Is Superior to ICG-001 in Protecting against Kidney Aging. KIDNEY DISEASES (BASEL, SWITZERLAND) 2022; 8:408-423. [PMID: 36466073 PMCID: PMC9710484 DOI: 10.1159/000526139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 07/08/2022] [Indexed: 06/17/2023]
Abstract
INTRODUCTION Aged kidney is characterized by mitochondrial dysfunction, cellular senescence, and fibrogenesis. The activation of Wnt/β-catenin signaling plays an important role in the initiation of kidney aging. However, the inhibiting strategies have not been discovered in detail. Here, we compared the therapeutic effects of two β-catenin inhibitors, KYA1797K and ICG-001, to assess their superiority. METHODS Two-month-old male C57BL/6 mice which had undergone unilateral nephrectomy and received D-galactose (D-gal) injection were co-treated with KYA1797K or ICG-001 at 10 mg/kg/day for 4 weeks. Human proximal renal tubular cells were treated with D-gal and KYA1797K/ICG-001 to compare their effects. RESULTS Compared with ICG-001, which inhibits β-catenin pathway through blocking the binding of β-catenin and cAMP response element-binding protein (CREB)-binding protein (CBP), KYA1797K, a novel small molecule destabilizing β-catenin through activating Axin-GSK3β complex, possesses the superior effects on protecting against kidney aging. In D-gal-treated accelerated aging mice, KYA1797K could greatly inhibit β-catenin pathway, preserve mitochondrial homeostasis, repress cellular senescence, and retard age-related kidney fibrosis. In cultured proximal tubular cells, KYA1797K shows a better effect on inhibiting cellular senescence and could better suppress mitochondrial dysfunction and ameliorate the fibrotic changes, at the same dose as that in ICG-001. CONCLUSION These results show that effectively eliminating β-catenin is a necessity to target against age-related kidney injury, suggesting the multiple transcriptional regulation of β-catenin in kidney aging besides T-cell factor/lymphoid enhancer-binding factor family of transcription factors (TCF/LEF-1).
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Affiliation(s)
- Mingsheng Zhu
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Guangdong Provincial Key Laboratory of Renal Failure Research, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Nephrology, The People's Hospital of Gaozhou, Maoming, China
| | - Xian Ling
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Guangdong Provincial Key Laboratory of Renal Failure Research, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Shan Zhou
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Guangdong Provincial Key Laboratory of Renal Failure Research, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Ping Meng
- Department of Nephrology, Huadu District People's Hospital, Southern Medical University, Guangzhou, China
| | - Qiyan Chen
- Department of Nephrology, The First People's Hospital of Foshan, Foshan, China
| | - Shuangqin Chen
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Guangdong Provincial Key Laboratory of Renal Failure Research, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Kunyu Shen
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Guangdong Provincial Key Laboratory of Renal Failure Research, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Chao Xie
- Department of Nephrology, The First People's Hospital of Foshan, Foshan, China
| | - Yaozhong Kong
- Department of Nephrology, The First People's Hospital of Foshan, Foshan, China
| | - Maosheng Wang
- The Cardiovascular Center, The People's Hospital of Gaozhou, Maoming, China
| | - Lili Zhou
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Guangdong Provincial Key Laboratory of Renal Failure Research, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou, China
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14
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Elucidation of the potential molecular mechanism of the active compounds of Bryophyllum pinnatum (L. f.) Oken against gastritis based on network pharmacology. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1016/j.cjac.2022.100193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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15
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Reynolds TH, Ives SJ. Life without Proteinase Activated Receptor 2 (PAR2) Alters Body Composition and Glucose Tolerance in Mice. Nutrients 2022; 14:nu14194096. [PMID: 36235747 PMCID: PMC9571032 DOI: 10.3390/nu14194096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 09/28/2022] [Accepted: 09/30/2022] [Indexed: 11/06/2022] Open
Abstract
The potential role of proteinase activated receptor 2 (PAR2) in the development of age-related obesity and insulin resistance is not well-understood. To address the hypothesis that deletion of PAR2 might ameliorate age-related obesity and impaired glucose homeostasis, we assessed body composition and insulin action in 18-month-old male PAR2 knockout (PAR2KO-AG), age-matched (AG) and young C57BL6 (YG, 6-month-old) mice. Body composition was measured by magnetic resonance spectroscopy (MRS) and insulin action was assessed by glucose tolerance (GT), insulin tolerance (IT) and AICAR tolerance (AT) testing. AG mice weighed significantly more than YG mice (p = 0.0001) demonstrating age-related obesity. However, PAR2KO-AG mice weighed significantly more than AG mice (p = 0.042), indicating that PAR2 may prevent a portion of age-related obesity. PAR2KO-AG and AG mice had greater fat mass and body fat percentage than YG mice. Similar to body weight, fat mass was greater in PAR2KO-AG mice compared to AG mice (p = 0.045); however, only a trend for greater body fat percentage in PAR2KO-AG compared to AG mice was observed (p = 0.09). No differences existed in lean body mass among the PAR2KO-AG, AG, and YG mice (p = 0.58). With regard to insulin action, the area under the curve (AUC) for GT was lower in PAR2KO-AG compared to AG mice (p = 0.0003) and YG mice (p = 0.001); however, no differences existed for the AUC for IT or AT. Our findings indicate that age-related obesity is not dependent on PAR2 expression.
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16
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Weber A, Medak KD, Townsend LK, Wright DC. Ketogenic diet induced weight loss occurs independent of housing temperature and is followed by hyperphagia and weight regain after cessation in mice. J Physiol 2022; 600:4677-4693. [PMID: 36083198 DOI: 10.1113/jp283469] [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: 06/14/2022] [Accepted: 08/24/2022] [Indexed: 11/08/2022] Open
Abstract
KEY POINTS Ketogenic diets reduce food intake, increase energy expenditure and cause weight loss in rodents Prior preclinical studies have been completed at room temperature, a condition which induces thermal stress and limits clinical translatability We demonstrate that ketogenic diet-induced reductions in food intake, increases in energy expenditure, weight loss and improvements in glucose homeostasis are similar in mice housed at room temperature or thermal neutrality Ketogenic diet induced reductions in food intake appear to explain a large degree of weight loss. Similarly, switching mice from a ketogenic to an obesogenic diet leads to hyperphagia mediated weight gain ABSTRACT: Ketogenic diets (KDs) are a popular tool used for weight management. Studies in mice have demonstrated that KDs reduce food intake, increase energy expenditure and cause weight loss. These studies were completed at room temperature (RT), a condition below the animal's thermal neutral (TN) zone which induces thermal stress. As energy intake and expenditure are sensitive to environmental temperature it's not clear if a KD would exert the same beneficial effects under TN conditions. Adherence to restrictive diets is poor and consequently it is important to examine the effects, and underlying mechanisms, of cycling from a ketogenic to an obesogenic diet. The purpose of the current study was to determine if housing temperature impacted the effects of a KD in obese mice and to determine if the mechanisms driving KD-induced weight loss reverse when mice are switched to an obesogenic high fat diet. We demonstrate that KD-induced reductions in food intake, increases in energy expenditure, weight loss and improvements in glucose homeostasis are not dependent upon housing temperature. KD-induced weight loss, seems to be largely explained by reductions in caloric intake while cycling mice back to an obesogenic diet following a period of KD feeding leads to hyperphagia-induced weight gain. Collectively, our results suggest that prior findings with mice fed a KD at RT are likely not an artifact of how mice were housed and that initial changes in weight when transitioning from an obesogenic to a ketogenic diet or back, are largely dependent on food intake. Abstract figure legend The impact of housing temperature on ketogenic diet mediated changes in energy expenditure, food intake and weight gain. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Alyssa Weber
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Kyle D Medak
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Logan K Townsend
- Centre for Metabolism, Obesity and Diabetes Research, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - David C Wright
- School of Kinesiology, University of British Columbia, Vancouver, British Columbia, Canada.,Faculty of Land and Food Systems, University of British Columbia, Vancouver, British Columbia, Canada.,British Columbia Children's Hospital Research Institute, Vancouver, British Columbia, Canada
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17
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Feng L, Chu Z, Quan X, Zhang Y, Yuan W, Yao Y, Zhao Y, Fu S. Malnutrition is positively associated with cognitive decline in centenarians and oldest-old adults: A cross-sectional study. EClinicalMedicine 2022; 47:101336. [PMID: 35497066 PMCID: PMC9046105 DOI: 10.1016/j.eclinm.2022.101336] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 01/23/2022] [Accepted: 02/18/2022] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Cognitive decline is a growing public health concern. However, presently, only a few large-scale studies are available on the prevalence of cognitive decline worldwide, and the relationship between nutrition and cognitive decline remains unclear and requires further investigation, especially among Chinese centenarians and oldest-old adults. This study aimed to assess the prevalence of cognitive decline among Chinese centenarians and oldest-old adults, its associated factors, and explore a possible connection with nutrition, to provide new directions for the prevention of cognitive decline in Chinese centenarians and oldest-old adults. METHODS Based on the China Hainan Centenarian Cohort Study (CHCCS), a household survey was conducted among all the centenarians and oldest-old adults residing in 16 cities and counties of Hainan province from June 2014 to June 2016. This study included 946 centenarians and oldest-old adults (412 and 534, respectively). Cognitive function was measured using the mini-mental state examination (MMSE). FINDINGS The total prevalence of cognitive decline was 76·6% (725 participants). Centenarians had a significantly higher prevalence of cognitive decline compared to oldest-old adults [359 centenarians (87·1%) vs. 366 oldest-old adults (68·5%)]. Centenarians and oldest-old adults with cognitive decline had significantly lower prognostic nutritional index (PNI) and mini nutrition assessment-short form (MNA-SF) than those without cognitive decline (P < 0·05). Multivariate logistic regression analyses showed that participants with higher PNI and MNA-SF were less likely to have cognitive decline. Multivariate linear regression analyses showed that PNI and MNA-SF were positively associated with MMSE (P < 0·05). INTERPRETATION Malnutrition was positively associated with cognitive decline among Chinese centenarians and oldest-old adults. It is therefore important for clinicians and community health workers to pay attention to malnutrition in these populations and provide supplemental nutrients to prevent cognitive decline. FUNDING This work was supported by grants from the National Natural Science Foundation of China (81900357, 81903392, 81941021, 81901252, 82001476, 81802804, 81801251), the Military Medical Science and Technology Youth Incubation Program (20QNPY110, 19QNP060), the Excellent Youth Incubation Program of Chinese People's Liberation Army General Hospital (2020-YQPY-007), the Military Medicine Youth Program of Chinese People's Liberation Army General Hospital (QNF19069, QNF19068), the National Key R&D Program of China (2018YFC2000400), the National S&D Resource Sharing Service Platform Project of China (YCZYPT[2018]07), the Innovation Platform for Academinicians of Hainan Province, the Hainan Major Scientific and Technological Cooperation Project (2016KJHZ0039), the China Postdoctoral Science Foundation funded project (2019M650359, 2020M682816, 2021T140298), the Medical Big Data R&D Project of Chinese People's Liberation Army General Hospital (MBD2018030), the National Geriatric Disease Clinical Medicine Research centre Project (NCRCG-PLAGH-2017-014), the Central Health Care Scientific Research Project (W2017BJ12), the Hainan Medical and Health Research Project (16A200057), the Sanya Medical and Health Science and Technology Innovation Project (2016YW21, 2017YW22, 2018YW11), and the Clinical Scientific Research Supporting Fund of Chinese People's Liberation Army General Hospital (2017FC-CXYY-3009).
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Affiliation(s)
- Long Feng
- Department of Anesthesiology, Hainan Hospital of Chinese People's Liberation Army General Hospital, Sanya, China
| | - Zhixiang Chu
- Emergency Department, Hainan Hospital of Chinese People's Liberation Army General Hospital, Sanya, China
| | - Xiaojiao Quan
- Intensive Care Unit, Hainan Hospital of Chinese People's Liberation Army General Hospital, Sanya, China
| | - Yujie Zhang
- Department of Epidemiology, School of Public Health, Southern Medical University, Guangzhou, China
| | - Weixiu Yuan
- Department of Anesthesiology, Hainan Hospital of Chinese People's Liberation Army General Hospital, Sanya, China
- Corresponding authors at: Hainan Hospital of Chinese People's Liberation Army General Hospital, Sanya, China.
| | - Yao Yao
- China Center for Health Development Studies, Peking University, Beijing, China
- Center for Healthy Aging and Development Studies, National School of Development, Peking University, Beijing, China
- Corresponding author at: China Center for Health Development Studies, Peking University, Beijing, China.
| | - Yali Zhao
- Central Laboratory, Hainan Hospital of Chinese People's Liberation Army General Hospital, Sanya, China
- Corresponding authors at: Hainan Hospital of Chinese People's Liberation Army General Hospital, Sanya, China.
| | - Shihui Fu
- Department of Cardiology, Hainan Hospital of Chinese People's Liberation Army General Hospital, Sanya, China
- Corresponding authors at: Hainan Hospital of Chinese People's Liberation Army General Hospital, Sanya, China.
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18
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Jiang N, Zhao Z. Intestinal aging is alleviated by uridine via regulating inflammation and oxidative stress in vivo and in vitro. Cell Cycle 2022; 21:1519-1531. [PMID: 35380925 PMCID: PMC9278450 DOI: 10.1080/15384101.2022.2055252] [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: 11/03/2022] Open
Abstract
Many countries in the world are stepping into the aging society with the challenge of the increasing agin gpopulation. The physiological functions of the human body begins to decline with aging, and the intestinal tract as the most important digestive organ will also be aging. How to relieve or reverse aging is an important scientific problem.The aging model in vivo and in vitro was established. Western-blot, indirect immunofluorescence and immunohistochemistry were carried out to explore the anti-aging effect of uridine.In the current study, we examined the anti-aging effect of uridine in vivo and in vitro experiments. In vitro cell model, we found that the aging level of intestinal tract was significantly reduced by uridine, uridine treatment down-regulated the Sa-β-gal-positive cells. Furthermore, the levels of inflammation and oxidative stress were also significantly reduced by uridine treatment. On this basis, in vivo experiments, we found that the aging level of mice fed with uridine was significantly lower than that of the control group as demonstrated by immunohistochemistry and Western blot analyses.In conclusion, our current research indicates that uridine shows a good anti-aging effect,which suggests that uridine is expected to be used as a health food or clinical drug to treat intestinal aging.
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Affiliation(s)
- Na Jiang
- Department of Gastroenterology, Wuhan Hankou Hospital, Wuhan, Beijing, China
| | - Zhiwei Zhao
- Department of Gastroenterology, Wuhan Hankou Hospital, Wuhan, Beijing, China
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Renal tubular PAR2 promotes interstitial fibrosis by increasing inflammatory responses and EMT process. Arch Pharm Res 2022; 45:159-173. [PMID: 35334088 DOI: 10.1007/s12272-022-01375-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 03/12/2022] [Indexed: 12/24/2022]
Abstract
Renal fibrosis is defined by excessive extracellular matrix (ECM) accumulation and is associated with a decreased kidney function. Increased inflammation and infiltration of inflammatory cells are the key features of renal fibrosis development; however, the mechanism of how inflammation starts is still un-known. Here, we show that the activation of epithelial Protease-activating receptor 2 (PAR2) signaling plays an important role in the initiation of inflammation via increased chemokine expression and inflammatory cell induction. In the adenine diet-induced renal fibrosis mouse model, PAR2 expression was significantly increased in the renal tubule region. Kidneys from PAR2-knockout mice were protected from adenine diet-induced renal fibrosis, kidney dysfunction, and inflammation. Using NRK52E kidney epithelial cells, we further elucidated the mechanisms underlying these processes. Activation of PAR2 signaling pathway by PAR2 agonist specifically increased the levels of chemokines, including MCP1 and MCP3, via the MAPK-NF-κB signaling pathway. Inhibition of the MAPK signaling pathway attenuated PAR2 agonist-induced NF-κB activation, chemokine expression, and macrophage cell induction. Furthermore, PAR2 activation directly increased mesenchymal cell markers in epithelial cells. Taken together, we found that increased PAR2 expression and the PAR2/MAPK signaling pathway promote renal fibrosis by increasing the inflammatory responses and promoting EMT process.
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20
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Yu Y, Zhu MJ, Wei CF, Yang J, Song JY, Dong L, Xiang S, Zhang L, Qiu Y, Lian F. Age-related differential gene expression in granulosa cells and its effects on fertility using high-throughput transcriptomics. Syst Biol Reprod Med 2022; 68:190-202. [PMID: 35331074 DOI: 10.1080/19396368.2022.2028320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
More couples worldwide, delay their childbearing years. The increase in age causes a gradual decrease in female ovarian function and fertility, leading to an exponential decrease in women over 35 years of age having children. Although promising for some, assisted reproductive technology (ART) is not promising for older women. Decreased fertility in advanced age has become a growing concern in the field of reproduction. In this study, high-throughput transcriptome sequencing was used to identify the differentially expressed genes (DEGs) in the ovarian granulosa cells (GCs) of older women (aged 35-44) with infertility and younger women (aged 25-34). The enriched functions and signaling pathways of DEGs were analyzed using Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG). The function of DEGs were analyzed and predicted combined with clinical ART data. Sequencing results were verified by quantitative reverse transcription-polymerase chain reaction. Retrospective clinical data and bioinformatics analyses revealed marked reductions in the retrieved oocyte, metaphase II oocyte, 2PN fertilization, and effective embryo numbers in older women. Although the clinical pregnancy and live birth rates did not differ notably between the groups, the miscarriage rate increased significantly in older women. In total, 620 DEGs were identified, of which 246 were upregulated, and 374 were downregulated in the older group. GO, and KEGG analyses indicated that the mechanism of fertility decline in older women was probably related to chronic inflammation, cytokine receptor interaction, and oxidative stress. In conclusion, combined with basic clinical ART data and pregnancy outcomes, we tried to provide a more intuitive and in-depth understanding of age-related reduction in ovarian function and pathogenesis of infertility with regard to chronic inflammation and oxidative stress.
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Affiliation(s)
- Yi Yu
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China.,Reproductive and Genetic Center of Integrated Traditional and Western Medicine, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Ming-Jie Zhu
- School of Medicine, Department of Orthopedics, University of Colorado, Colorado, CO, USA
| | - Chao-Feng Wei
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Jie Yang
- The personnel department, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Jing-Yan Song
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Li Dong
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Shan Xiang
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Liang Zhang
- Reproductive and Genetic Center of Integrated Traditional and Western Medicine, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Yue Qiu
- Reproductive and Genetic Center of Integrated Traditional and Western Medicine, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Fang Lian
- Reproductive and Genetic Center of Integrated Traditional and Western Medicine, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
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21
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Fu L, Liu H, Cai W, Han D, Zhu X, Yang Y, Xie S. 4-Octyl Itaconate Supplementation Relieves Soybean Diet-Induced Liver Inflammation and Glycolipid Metabolic Disorders by Activating the Nrf2-Pparγ Pathway in Juvenile Gibel Carp. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:520-531. [PMID: 34881880 DOI: 10.1021/acs.jafc.1c05783] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Itaconate is a promising new candidate for anti-inflammatory and metabolic reprogramming, and 4-octyl itaconate (OI) is a cell-permeable itaconate derivative. To investigate the effect of OI in inflammatory response and glycolipid metabolism, we fed gibel carp with a 40% dietary soybean meal diet containing 0.1% OI (SBM + 0.1OI) or not (SBM) and compared these with fishmeal (FM) as reference. Compared with FM, dietary SBM decreased the growth performance, induced inflammation in the intestine and liver, and decreased the glucose utilization ability of the liver. However, 0.1% OI supplementation in SBM significantly increased the growth performance (from 20.11 ± 0.77 to 23.33 ± 0.45 g, P < 0.05), reduced inflammation in different organs through Nrf2 activation, and alleviated SBM-induced high plasma glucose (from 6.06 ± 0.23 to 4.37 ± 0.14 g, P < 0.05) and low crude body lipid (from 4.08 ± 0.17 to 4.91 ± 0.10 g, P < 0.05). Multi-omics revealed that OI had obvious effects on carbohydrate metabolism. OI regulates peroxisome proliferator-activated receptor gamma (ppar-γ), and its target genes (glut2 and gk) enhance liver glycolysis and lipid de novo lipogenesis, which are also dependent on Nrf2 activation. To conclude, dietary 0.1% OI can promote the growth of gibel carp and alleviate foodborne intestinal and hepatic inflammation and abnormal glycolipid metabolism by Nrf2-regulated Pparγ expression.
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Affiliation(s)
- Lele Fu
- State Key Laboratory of Fresh Water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Haokun Liu
- State Key Laboratory of Fresh Water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Wanjie Cai
- State Key Laboratory of Fresh Water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Dong Han
- State Key Laboratory of Fresh Water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
- Hubei Engineering Research Center for Aquatic Animal Nutrition and Feed, Wuhan 430072, China
| | - Xiaoming Zhu
- State Key Laboratory of Fresh Water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
- Hubei Engineering Research Center for Aquatic Animal Nutrition and Feed, Wuhan 430072, China
| | - Yunxia Yang
- State Key Laboratory of Fresh Water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Shouqi Xie
- State Key Laboratory of Fresh Water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
- Hubei Engineering Research Center for Aquatic Animal Nutrition and Feed, Wuhan 430072, China
- The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan 430072, China
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22
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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] [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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23
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Xie J, Wang Y, Lu L, Liu L, Yu X, Pei F. Cellular senescence in knee osteoarthritis: molecular mechanisms and therapeutic implications. Ageing Res Rev 2021; 70:101413. [PMID: 34298194 DOI: 10.1016/j.arr.2021.101413] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 07/06/2021] [Accepted: 07/16/2021] [Indexed: 02/08/2023]
Abstract
Cellular senescence is the inability of cells to proliferate, which has both beneficial and detrimental effects on tissue development and homeostasis. Chronic accumulation of senescent cells is associated with age-related disease, including osteoarthritis, a common joint disease responsible for joint pain and disability in older adults. The pathology of this disease includes loss of cartilage, synovium inflammation, and subchondral bone remodeling. Senescent cells are present in the cartilage of people with advanced osteoarthritis, but the link between cellular senescence and this disease is unclear. In this review, we summarize current evidence for the role of cellular senescence of different cell types in the onset and progression of osteoarthritis. We focus on the underlying mechanisms of senescence in chondrocytes, which maintain the cartilage in joints, and review the role of the Forkhead family of transcription factors, which are involved in cartilage maintenance and osteoarthritis. Finally, we discuss the potential therapeutic value and implications of targeting senescent cells using senolytic agents or immune therapies, targeting the senescence-associated secretory phenotype of these cells using senomorphic agents, and renewing the plasticity of stem cells and chondrocytes. Our review highlights current gaps in understanding of the mechanism of senescence that may, when addressed, provided new options for modifying and treating disease in osteoarthritis.
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24
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Zhao P, Yue Z, Nie L, Zhao Z, Wang Q, Chen J, Wang Q. Hyperglycaemia-associated macrophage pyroptosis accelerates periodontal inflamm-aging. J Clin Periodontol 2021; 48:1379-1392. [PMID: 34219262 DOI: 10.1111/jcpe.13517] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 05/29/2021] [Accepted: 06/19/2021] [Indexed: 02/05/2023]
Abstract
AIM Pyroptosis and inflamm-aging have been newly identified to be involved in diabetic periodontitis. This study aimed to elucidate whether macrophage pyroptosis plays a role in periodontal inflamm-aging by impacting the senescence of fibroblasts, as well as the potential mechanism via NLR family CARD domain-containing protein 4 (NLRC4) phosphorylation. MATERIALS AND METHODS Diabetes was induced in mice using streptozotocin. Periodontal pyroptosis and senescence were detected using immunohistochemical analysis. Prior to evaluating senescence in human gingival fibroblasts cultured with conditioned medium derived from macrophages, RAW 264.7 macrophages were confirmed to undergo pyroptosis by scanning electron microscopy and gasdermin D (GSDMD) detection. The NLRC4-related pathway was examined under hyperglycaemic conditions. RESULTS Our data showed that macrophage pyroptosis induced the expression of senescent markers in vivo and in vitro. Importantly, clearance of pyroptotic macrophages rescued senescence in fibroblasts. Furthermore, GSDMD activation and pyroptosis in hyperglycaemia were found to be mediated by NLRC4 phosphorylation. CONCLUSIONS Hyperglycaemia could initially induce macrophage pyroptosis and lead to cellular senescence, thereby critically contributing to periodontal pathogenesis in diabetes. In particular, NLRC4 phosphorylation could be a potential therapeutic target for the inhibition of this process.
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Affiliation(s)
- Pengfei Zhao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ziqi Yue
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Lulingxiao Nie
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Zhihao Zhao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qian Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jiao Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qi Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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25
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Yang S, Pang L, Dai W, Wu S, Ren T, Duan Y, Zheng Y, Bi S, Zhang X, Kong J. Role of Forkhead Box O Proteins in Hepatocellular Carcinoma Biology and Progression (Review). Front Oncol 2021; 11:667730. [PMID: 34123834 PMCID: PMC8190381 DOI: 10.3389/fonc.2021.667730] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 04/28/2021] [Indexed: 12/23/2022] Open
Abstract
Hepatocellular carcinoma (HCC), the most common type of malignant tumor of the digestive system, is associated with high morbidity and mortality. The main treatment for HCC is surgical resection. Advanced disease, recurrence, and metastasis are the main factors affecting prognosis. Chemotherapy and radiotherapy are not sufficiently efficacious for the treatment of primary and metastatic HCC; therefore, optimizing targeted therapy is essential for improving outcomes. Forkhead box O (FOXO) proteins are widely expressed in cells and function to integrate a variety of growth factors, oxidative stress signals, and other stimulatory signals, thereby inducing the specific expression of downstream signal factors and regulation of the cell cycle, senescence, apoptosis, oxidative stress, HCC development, and chemotherapy sensitivity. Accordingly, FOXO proteins are considered multifunctional targets of cancer treatment. The current review discusses the roles of FOXO proteins, particularly FOXO1, FOXO3, FOXO4, and FOXO6, in HCC and establishes a theoretical basis for the potential targeted therapy of HCC.
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Affiliation(s)
- Shaojie Yang
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - Liwei Pang
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - Wanlin Dai
- Innovation Institute of China Medical University, Shenyang, China
| | - Shuodong Wu
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - Tengqi Ren
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - Yunlong Duan
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - Yuting Zheng
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - Shiyuan Bi
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - Xiaolin Zhang
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - Jing Kong
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China
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26
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Li ZX, Yang DJ, Huo ZK, Wen PH, Hu BW, Wang ZH, Guo WZ, Zhang SJ. Effects of chitinase-3-like protein 1 on brain death-induced hepatocyte apoptosis via PAR2-JNK-caspase-3. Biochem Biophys Res Commun 2021; 552:150-156. [PMID: 33744763 DOI: 10.1016/j.bbrc.2021.03.048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 03/09/2021] [Indexed: 02/07/2023]
Abstract
Hepatocyte apoptosis is a crucial factor affecting liver quality in brain-dead donors. The identification of key molecular proteins involved in brain-death (BD)-induced hepatocyte apoptosis may help determine an effective method for improving the quality of livers from brain-dead donors. In this study, we used in vivo and in vitro models to investigate the role of chitinase-3-like protein 1 (CHI3L1) in promoting liver cell apoptosis after BD. Chitin was used to inhibit CHI3L1 in a rat model of BD. Macrophage polarization of THP-1 cells and hypoxia/reoxygenation (H/R) of LO-2 cells were used to mimic BD-induced cell stress in liver. We found that CHI3L1 played a vital role in promoting liver cell apoptosis. Six hours after BD, CHI3L1 expression was significantly upregulated in liver macrophages and was associated with BD-induced M1 polarization of these cells. In liver cells cultured under H/R conditions, recombinant CHI3L1 activated the protease-activated receptor 2 (PAR2)/c-June N-terminal kinase (JNK) apoptotic pathway and aggravated apoptosis. Compared with the control group, chitin particles inhibited the expression of CHI3L1 in the liver of brain dead rats, thereby reducing activation of the hepatocyte surface receptor, PAR2, and its downstream JNK/caspase-3 signaling pathway, ultimately reducing hepatocyte apoptosis. In conclusion, our results indicate that CHI3L1 relies on a PAR2/JNK-mediated mechanism to promote BD-induced hepatocyte apoptosis.
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Affiliation(s)
- Ze-Xin Li
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China; Henan Medical Engineering and Technology Center of Organ Transplantation, Zhengzhou, Henan, China; Zhengzhou Key Laboratory of Hepatobiliary & Pancreatic Diseases and Organ Transplantation, Zhengzhou, Henan, China; Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China
| | - Dong-Jing Yang
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China; Henan Medical Engineering and Technology Center of Organ Transplantation, Zhengzhou, Henan, China; Zhengzhou Key Laboratory of Hepatobiliary & Pancreatic Diseases and Organ Transplantation, Zhengzhou, Henan, China
| | - Zhong-Kun Huo
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China; Henan Medical Engineering and Technology Center of Organ Transplantation, Zhengzhou, Henan, China; Zhengzhou Key Laboratory of Hepatobiliary & Pancreatic Diseases and Organ Transplantation, Zhengzhou, Henan, China
| | - Pei-Hao Wen
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China; Henan Medical Engineering and Technology Center of Organ Transplantation, Zhengzhou, Henan, China
| | - Bo-Wen Hu
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China; Henan Medical Engineering and Technology Center of Organ Transplantation, Zhengzhou, Henan, China
| | - Zhi-Hui Wang
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China; Henan Medical Engineering and Technology Center of Organ Transplantation, Zhengzhou, Henan, China
| | - Wen-Zhi Guo
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China; Henan Medical Engineering and Technology Center of Organ Transplantation, Zhengzhou, Henan, China; Zhengzhou Key Laboratory of Hepatobiliary & Pancreatic Diseases and Organ Transplantation, Zhengzhou, Henan, China
| | - Shui-Jun Zhang
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China; Henan Medical Engineering and Technology Center of Organ Transplantation, Zhengzhou, Henan, China; Zhengzhou Key Laboratory of Hepatobiliary & Pancreatic Diseases and Organ Transplantation, Zhengzhou, Henan, China.
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27
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Wei Y, Liang M, Xiong L, Su N, Gao X, Jiang Z. PD-L1 induces macrophage polarization toward the M2 phenotype via Erk/Akt/mTOR. Exp Cell Res 2021; 402:112575. [PMID: 33771483 DOI: 10.1016/j.yexcr.2021.112575] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 03/04/2021] [Accepted: 03/19/2021] [Indexed: 02/06/2023]
Abstract
PD-L1 (programmed death-ligand 1) is the ligand of PD-1 (programmed cell death protein 1) and regulates inhibitory immune responses. It is well known that PD-L1 suppresses T cell function via binding to PD-1. However, little is known about the role of the PD-1/PD-L1 axis in macrophage polarization. According to previous studies, the function of the PD-1/PD-L1 axis in macrophage polarization is controversial, and the underlying mechanism has not been fully elucidated. Thus, we treated THP-1-derived macrophages with human PD-L1 Fc to determine the role of the PD-1/PD-L1 axis in macrophage polarization. To further explore the mechanism, we performed RNA sequencing and used specific inhibitors to identify the implicated signalling pathways. In this study, we found that PD-L1 induces the upregulation of CD206 expression, which is inhibited by nivolumab, LY294002, U0126, and rapamycin. Evaluation of differentially expressed genes (DEGs) and bioinformatics analysis indicated that PD-L1 also induces the upregulation of the expression of genes that maintain mitochondrial function and mediate metabolic switching. In addition, we did not detect PD-L1-induced CD86 alterations, indicating that PD-L1 treatment has no significant influence on M1 polarization. Taken together, these results suggest that PD-L1 binds to PD-1 and promotes M2 polarization accompanied by mitochondrial function enhancement and metabolic reprogramming via Erk/Akt/mTOR. This study elucidates the role of PD-L1 in macrophage polarization and verifies the underlying mechanisms for the first time. Considering that aberrantly upregulated PD-L1 expression contributes to a wide variety of diseases, targeting PD-L1-mediated macrophage polarization is a prospective therapeutic strategy for both neoplastic and nonneoplastic diseases.
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Affiliation(s)
- Yi Wei
- Department of Nephrology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Mengjun Liang
- Department of Nephrology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Liping Xiong
- Department of Nephrology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Ning Su
- Department of Nephrology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiang Gao
- Department of Gastroenterology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Zongpei Jiang
- Department of Nephrology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
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28
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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] [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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29
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Ha S, Kim MJ, Kim DH, Kim BM, Chung KW, Chung HY. Short-term intake of high fat diet aggravates renal fibrosis in aged Sprague-Dawley rats. Exp Gerontol 2020; 142:111108. [PMID: 33130113 DOI: 10.1016/j.exger.2020.111108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 09/28/2020] [Accepted: 09/29/2020] [Indexed: 12/11/2022]
Abstract
Age- or high fat diet (HFD)-associated renal structural changes are commonly associated with a decline in renal function. Although HFD causes injurious effects in various organs during aging, its effects on age-associated renal fibrosis have not yet been investigated. In this study, we show that a short-term HFD significantly induces renal fibrosis by causing loss of mitochondrial integrity in aged Sprague-Dawley (SD) rats. To evaluate the effects of short-term HFD intake on age-associated renal fibrosis, we administered HFD in young and aged SD rats for 15 days. Our results showed that a short-term HFD significantly increased the renal fibrosis and inflammation in aged rats. Moreover, mitochondrial integrity and the expression of fatty acid oxidation-related proteins decreased in the kidneys of the HFD-fed aged rats. Further, NRK52E renal tubular epithelial cells subjected to lipid stress by treatment with oleic acid showed a reduced amount of mitochondrial OXPHOS-related proteins. Our results suggest that short-term HFD affects mitochondrial integrity and exacerbates inflammation leading to renal fibrosis, especially in aged rats. We conclude that the mitochondrial integrity in kidney tissues is important in HFD-induced renal fibrosis development during aging.
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Affiliation(s)
- Sugyeong Ha
- College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Min Jo Kim
- College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea; Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Dae Hyun Kim
- College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Byeong Moo Kim
- College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Ki Wung Chung
- College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea.
| | - Hae Young Chung
- College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea.
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Molecular characterization and expression analysis of foxo3l in response to exogenous hormones in black rockfish (Sebastes schlegelii). Gene 2020; 753:144777. [PMID: 32428695 DOI: 10.1016/j.gene.2020.144777] [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: 03/01/2020] [Revised: 05/07/2020] [Accepted: 05/14/2020] [Indexed: 11/22/2022]
Abstract
As a crucial member of the Forkhead Box family, class O (FoxO) plays an essential role in growth, cell differentiation, metabolism, immunization, and apoptosis. Meanwhile, FoxO3 is the primary regulator and effective inhibitor of primordial follicle activation. In this study, seven foxo genes were identified in black rockfish (Sebastes schlegelii), including two foxo1 genes (foxo1a, foxo1b), two foxo3 genes (foxo3, foxo3l), one foxo4 gene, and two foxo6 genes (foxo6a, foxo6b). foxo3l was derived from teleost-specific whole-genome duplication events. Evaluation of tissue expression pattern revealed that foxo3l displayed sexually dimorphic expression with a high level in the ovary and spatial expression only in the cytoplasm of follicle cells and oocytes. When the ovaries were stimulated by estrogen and gonadotropin, foxo3l expression was remarkably reduced, and the effect of androgen was completely different. We considered that foxo3l lost its ability to inhibit follicular precocity because of mass ovulation by hormone stimulation, resulting in its decreased expression. Such evidence indicated that foxo3l is an important regulator of reproduction-related functions in black rockfish. This study provides new insights into foxo3l genes for further functional research in teleost.
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Abstract
Sleep maintains the function of the entire body through homeostasis. Chronic sleep deprivation (CSD) is a prime health concern in the modern world. Previous reports have shown that CSD has profound negative effects on brain vasculature at both the cellular and molecular levels, and that this is a major cause of cognitive dysfunction and early vascular ageing. However, correlations among sleep deprivation (SD), brain vascular changes and ageing have barely been looked into. This review attempts to correlate the alterations in the levels of major neurotransmitters (acetylcholine, adrenaline, GABA and glutamate) and signalling molecules (Sirt1, PGC1α, FOXO, P66shc, PARP1) in SD and changes in brain vasculature, cognitive dysfunction and early ageing. It also aims to connect SD-induced loss in the number of dendritic spines and their effects on alterations in synaptic plasticity, cognitive disabilities and early vascular ageing based on data available in scientific literature. To the best of our knowledge, this is the first article providing a pathophysiological basis to link SD to brain vascular ageing.
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Abstract
PURPOSE OF REVIEW FOXOs are transcription factors that regulate downstream target genes to counteract to cell stress. Here we review the function and regulation of FOXO transcription factors, the mechanism of FOXO3 activation in the kidney, and the role of FOXO3 in delaying the development of chronic kidney disease (CKD). RECENT FINDINGS Progressive renal hypoxia from vascular dropout and metabolic perturbation is a pathogenic factor for the initiation and development of CKD. Hypoxia and low levels of α-ketoglutarate generated from the TCA cycle inhibit prolyl hydroxylase domain (PHD)-mediated prolyl hydroxylation of FoxO3, thus reducing FoxO3 protein degradation via the ubiquitin proteasomal pathway, similar to HIF stabilization under hypoxic conditions. FoxO3 accumulation and nuclear translocation activate two key cellular defense mechanisms, autophagy and antioxidative response in renal tubular cells, to reduce cell injury and promote cell survival. FoxO3 directly activates the expression of Atg proteins, which replenishes core components of the autophagic machinery to allow sustained autophagy in the chronically hypoxic kidney. FoxO3 protects mitochondria by stimulating the expression of superoxide dismutase 2 (SOD2), as tubular deletion of FoxO3 in mice results in reduced SOD2 levels and profound mitochondrial damage. SUMMARY Knowledge gained from animal studies may help understand the function of stress responsive transcription factors that could be targeted to prevent or treat CKD.
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Mechanisms of Calorie Restriction: A Review of Genes Required for the Life-Extending and Tumor-Inhibiting Effects of Calorie Restriction. Nutrients 2019; 11:nu11123068. [PMID: 31888201 PMCID: PMC6950657 DOI: 10.3390/nu11123068] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 12/12/2019] [Accepted: 12/13/2019] [Indexed: 12/30/2022] Open
Abstract
This review focuses on mechanisms of calorie restriction (CR), particularly the growth hormone (GH)/insulin-like growth factor-1 (IGF-1) axis as an evolutionary conserved signal that regulates aging and lifespan, underlying the effects of CR in mammals. Topics include (1) the relation of the GH-IGF-1 signal with chronic low-level inflammation as one of the possible causative factors of aging, that is, inflammaging, (2) the isoform specificity of the forkhead box protein O (FoxO) transcription factors in CR-mediated regulation of cancer and lifespan, (3) the role for FoxO1 in the tumor-inhibiting effect of CR, (4) pleiotropic roles for FoxO1 in the regulation of disorders, and (5) sirtuin (Sirt) as a molecule upstream of FoxO. From the evolutionary view, the necessity of neuropeptide Y (Npy) for the effects of CR and the pleiotropic roles for Npy in life stages are also emphasized. Genes for mediating the effects of CR and regulating aging are context-dependent, particularly depending on nutritional states.
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