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Wang W, Chen C, Wang Q, Ma J, Li Y, Guan Z, Wang R, Chen X. Electroacupuncture pretreatment preserves telomerase reverse transcriptase function and alleviates postoperative cognitive dysfunction by suppressing oxidative stress and neuroinflammation in aged mice. CNS Neurosci Ther 2024; 30:e14373. [PMID: 37501354 PMCID: PMC10848091 DOI: 10.1111/cns.14373] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 07/06/2023] [Accepted: 07/09/2023] [Indexed: 07/29/2023] Open
Abstract
BACKGROUND Elderly patients often exhibit postoperative cognitive dysfunction (POCD), a postsurgical decline in memory and executive function. Oxidative stress and neuroinflammation, both pathological characteristics of the aged brain, contribute to this decline. This study posits that electroacupuncture (EA) stimulation, an effective antioxidant and anti-inflammatory modality, may enhance telomerase reverse transcriptase (TERT) function, the catalytic subunit of telomerase known for its protective properties against cellular senescence and oxidative damage, to alleviate POCD in aged mice. METHODS The animal POCD model was created by subjecting aged mice to abdominal surgery, followed by EA pretreatment at the Baihui acupoint (GV20). Postoperative cognitive function was gauged using the Morris water maze (MWM) test. Hippocampal TERT mRNA levels and telomerase activity were determined through qPCR and a Telomerase PCR ELISA kit, respectively. Oxidative stress was assessed through superoxide dismutase (SOD), reactive oxygen species (ROS), and malondialdehyde (MDA) levels. Iba-1 immunostaining determined the quantity of hippocampal microglia. Additionally, western blotting assessed TERT, autophagy markers, and proinflammatory cytokines at the protein level. RESULTS Abdominal surgery in aged mice significantly decreased telomerase activity and TERT mRNA and protein levels, but increased oxidative stress and neuroinflammation and decreased autophagy in the hippocampus. EA-pretreated mice demonstrated improved postoperative cognitive performance, enhanced telomerase activity, increased TERT protein expression, improved TERT mitochondrial localization, and reduced oxidative damage, autophagy dysfunction, and neuroinflammation. The neuroprotective benefits of EA pretreatment were diminished following TERT knockdown. CONCLUSIONS Our findings underscore the significance of TERT function preservation in alleviating surgery-induced oxidative stress and neuroinflammation in aged mice. A novel neuroprotective mechanism of EA stimulation is highlighted, whereby modulation of TERT and telomerase activity reduces oxidative damage and neuroinflammation. Consequently, maintaining TERT function via EA treatment could serve as an effective strategy for managing POCD in elderly patients.
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Affiliation(s)
- Wei Wang
- Department of AnesthesiologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an Jiaotong UniversityXi'anShaanxiChina
- Department of AnesthesiologyThe First People's Hospital of FoshanFoshanGuangdongChina
| | - Chen Chen
- Department of Burns and Plastic surgeryHainan Hospital of PLA General HospitalSanyaHainanChina
| | - Qiang Wang
- Department of AnesthesiologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an Jiaotong UniversityXi'anShaanxiChina
| | - Ji‐Guang Ma
- Department of AnesthesiologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an Jiaotong UniversityXi'anShaanxiChina
| | - Yan‐Song Li
- Department of AnesthesiologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an Jiaotong UniversityXi'anShaanxiChina
| | - Zheng Guan
- Department of AnesthesiologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an Jiaotong UniversityXi'anShaanxiChina
| | - Rui Wang
- Department of AnesthesiologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an Jiaotong UniversityXi'anShaanxiChina
| | - Xin Chen
- Department of AnesthesiologyThe First People's Hospital of FoshanFoshanGuangdongChina
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Chen F, Lu K, Bai N, Hao Y, Wang H, Zhao X, Yue F. Oral administration of ellagic acid mitigates perioperative neurocognitive disorders, hippocampal oxidative stress, and neuroinflammation in aged mice by restoring IGF-1 signaling. Sci Rep 2024; 14:2509. [PMID: 38291199 PMCID: PMC10827749 DOI: 10.1038/s41598-024-53127-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 01/29/2024] [Indexed: 02/01/2024] Open
Abstract
This study investigates the potential of ellagic acid (EA), a phytochemical with antioxidant and anti-inflammatory properties, in managing perioperative neurocognitive disorders (PND). PND, which represents a spectrum of cognitive impairments often faced by elderly patients, is principally linked to surgical and anesthesia procedures, and heavily impacted by oxidative stress in the hippocampus and microglia-induced neuroinflammation. Employing an aged mice model subjected to abdominal surgery, we delve into EA's ability to counteract postoperative oxidative stress and cerebral inflammation by engaging the Insulin-like growth factor-1 (IGF-1) pathway. Our findings revealed that administering EA orally notably alleviated post-surgical cognitive decline in older mice, a fact that was manifested in improved performance during maze tests. This enhancement in the behavioral performance of the EA-treated mice corresponded with the rejuvenation of IGF-1 signaling, a decrease in oxidative stress markers in the hippocampus (like MDA and carbonylated protein), and an increase in the activity of antioxidant enzymes such as SOD and CAT. Alongside these, we observed a decrease in microglia-driven neuroinflammation in the hippocampus, thus underscoring the antioxidant and anti-inflammatory roles of EA. Interestingly, when EA was given in conjunction with an IGF1R inhibitor, these benefits were annulled, accentuating the pivotal role that the IGF-1 pathway plays in the neuroprotective potential of EA. Hence, EA could serve as a potent candidate for safeguarding against PND in older patients by curbing oxidative stress and neuroinflammation through the activation of the IGF-1 pathway.
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Affiliation(s)
- Fang Chen
- Department of Anesthesiology, Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, 710068, Shaanxi, China
| | - Kai Lu
- Department of Anesthesiology, Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, 710068, Shaanxi, China
| | - Ning Bai
- Department of Anesthesiology, Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, 710068, Shaanxi, China
| | - Yabo Hao
- Department of Anesthesiology, Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, 710068, Shaanxi, China
| | - Hui Wang
- Department of Anesthesiology, Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, 710068, Shaanxi, China
| | - Xinrong Zhao
- Department of Anesthesiology, Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, 710068, Shaanxi, China
| | - Fang Yue
- Department of Anesthesiology, Shaanxi Provincial People's Hospital, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, 710068, Shaanxi, China.
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Dai G, Li M, Xu H, Quan N. Status of Research on Sestrin2 and Prospects for its Application in Therapeutic Strategies Targeting Myocardial Aging. Curr Probl Cardiol 2023; 48:101910. [PMID: 37422038 DOI: 10.1016/j.cpcardiol.2023.101910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 07/10/2023]
Abstract
Cardiac aging is accompanied by changes in the heart at the cellular and molecular levels, leading to alterations in cardiac structure and function. Given today's increasingly aging population, the decline in cardiac function caused by cardiac aging has a significant impact on quality of life. Antiaging therapies to slow the aging process and attenuate changes in cardiac structure and function have become an important research topic. Treatment with drugs, including metformin, spermidine, rapamycin, resveratrol, astaxanthin, Huolisu oral liquid, and sulforaphane, has been demonstrated be effective in delaying cardiac aging by stimulating autophagy, delaying ventricular remodeling, and reducing oxidative stress and the inflammatory response. Furthermore, caloric restriction has been shown to play an important role in delaying aging of the heart. Many studies in cardiac aging and cardiac aging-related models have demonstrated that Sestrin2 has antioxidant and anti-inflammatory effects, stimulates autophagy, delays aging, regulates mitochondrial function, and inhibits myocardial remodeling by regulation of relevant signaling pathways. Therefore, Sestrin2 is likely to become an important target for antimyocardial aging therapy.
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Affiliation(s)
- Gaoying Dai
- Department of Cardiovascular Center, The First Hospital of Jilin University, Changchun, China
| | - Meina Li
- Department of Infection Control, The First Hospital of Jilin University, Changchun, China
| | - He Xu
- Department of Integrative Medicine, Lequn Branch, The First Hospital of Jilin University, Changchun, China
| | - Nanhu Quan
- Department of Cardiovascular Center, The First Hospital of Jilin University, Changchun, China.
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Moshkovits Y, Goldman A, Beckerman P, Tiosano S, Kaplan A, Kalstein M, Bayshtok G, Segev S, Grossman E, Segev A, Maor E. Baseline renal function and the risk of cancer among apparently healthy middle-aged adults. Cancer Epidemiol 2023; 86:102428. [PMID: 37482051 DOI: 10.1016/j.canep.2023.102428] [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: 05/02/2023] [Revised: 06/16/2023] [Accepted: 07/12/2023] [Indexed: 07/25/2023]
Abstract
BACKGROUND The association between mildly impaired renal function with all-site and site-specific cancer risk is not established. We aim to explore this association among apparently healthy adults. METHODS We followed 25,073 men and women, aged 40-79 years, free of cancer or cardiovascular disease at baseline who were screened annually in preventive healthcare settings. The estimated glomerular filtration rate (eGFR) was calculated using the CKD Epidemiology Collaboration equation (CKD-EPI) and classified into four mutually exclusive groups: <60, 60-74, 75-89, ≥90 (mL/min/1.73 m²). The primary outcome was all-site cancer while the secondary outcome was site-specific cancer. Cancer data was available from a national registry. RESULTS Mean age at baseline was 50 ± 8 years and 7973 (32 %) were women. During a median follow-up of 9 years (IQR 3-16) and 256,279 person years, 2045 (8.2 %) participants were diagnosed with cancer. Multivariable Cox model showed a 1.2 (95 %CI: 1.0-1.4 p = 0.05), 1.2 (95 %CI: 1.0-1.4 p = 0.02), and 1.4 (95 %CI: 1.1-1.7 p = 0.003) higher risk for cancer with eGFR of 75-89, 60-74, and < 60, respectively. Site-specific analysis demonstrated a 1.8 (95 %CI: 1.2-2.6 p = 0.004), 1.7 (95 %CI: 1.2-2.6 p = 0.004) and 2.2 (95 %CI: 1.3-3.6 p = 0.002) increased risk for prostate cancer with eGFR of 75-89, 60-74, and < 60, respectively. eGFR< 60 was associated with a 2.0 (95 %CI: 1.1-3.7 p = 0.03) and 3.7 (95 %CI: 1.1-13.1 p = 0.04) greater risk for melanoma and gynecological caner respectively. CONCLUSIONS CKD stage 2 and worse is independently associated with higher risk for cancer incidence, primarily prostate cancer. Early intervention and screening are warranted among these individuals in order to reduce cancer burden.
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Affiliation(s)
- Yonatan Moshkovits
- Leviev Heart Center, Sheba Medical Center, Ramat-Gan, Israel; Sackler School of Medicine, Tel Aviv University, Tel-Aviv, Israel
| | - Adam Goldman
- Leviev Heart Center, Sheba Medical Center, Ramat-Gan, Israel; Department of Epidemiology and Preventive Medicine, School of Public Health, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Pazit Beckerman
- Sackler School of Medicine, Tel Aviv University, Tel-Aviv, Israel; The Institute of Nephrology and Hypertension, Sheba Medical Center, Ramat-Gan, Israel
| | - Shmuel Tiosano
- Leviev Heart Center, Sheba Medical Center, Ramat-Gan, Israel; Sackler School of Medicine, Tel Aviv University, Tel-Aviv, Israel
| | - Alon Kaplan
- Leviev Heart Center, Sheba Medical Center, Ramat-Gan, Israel; Sackler School of Medicine, Tel Aviv University, Tel-Aviv, Israel
| | - Maia Kalstein
- Leviev Heart Center, Sheba Medical Center, Ramat-Gan, Israel; Sackler School of Medicine, Tel Aviv University, Tel-Aviv, Israel
| | | | - Shlomo Segev
- Sackler School of Medicine, Tel Aviv University, Tel-Aviv, Israel; The Institute for Medical Screening, Sheba Medical Center, Ramat-Gan, Israel
| | - Ehud Grossman
- Sackler School of Medicine, Tel Aviv University, Tel-Aviv, Israel; Department of Internal Medicine, Sheba Medical Center, Ramat-Gan, Israel
| | - Amit Segev
- Leviev Heart Center, Sheba Medical Center, Ramat-Gan, Israel; Sackler School of Medicine, Tel Aviv University, Tel-Aviv, Israel
| | - Elad Maor
- Leviev Heart Center, Sheba Medical Center, Ramat-Gan, Israel; Sackler School of Medicine, Tel Aviv University, Tel-Aviv, Israel.
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5
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Lee JL, Zhang C, Westbrook R, Gabrawy MM, Nidadavolu L, Yang H, Marx R, Wu Y, Anders NM, Ma L, Bichara MD, Kwak MJ, Buta B, Khadeer M, Yenokyan G, Tian J, Xue QL, Siragy HM, Carey RM, de Cabo R, Ferrucci L, Moaddel R, Rudek MA, Le A, Walston JD, Abadir PM. Serum Concentrations of Losartan Metabolites Correlate With Improved Physical Function in a Pilot Study of Prefrail Older Adults. J Gerontol A Biol Sci Med Sci 2022; 77:2356-2366. [PMID: 35511890 PMCID: PMC9799219 DOI: 10.1093/gerona/glac102] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Indexed: 01/20/2023] Open
Abstract
Losartan is an oral antihypertensive agent that is rapidly metabolized to EXP3174 (angiotensin-subtype-1-receptor blocker) and EXP3179 (peroxisome proliferator-activated receptor gamma [PPARγ] agonist), which was shown in animal studies to reduce inflammation, enhance mitochondrial energetics, and improve muscle repair and physical performance. We conducted an exploratory pilot study evaluating losartan treatment in prefrail older adults (age 70-90 years, N = 25). Participants were randomized to control (placebo) or treatment (daily oral losartan beginning at 25 mg per day and increasing every 8 weeks) for a total of 6 months. Fatigue, hyperkalemia, and hypotension were the most observed side effects of losartan treatment. Participants in the losartan group had an estimated 89% lower odds of frailty (95% confidence interval [CI]: 18% to 99% lower odds, p = .03), with a 0.3-point lower frailty score than the placebo group (95% CI: 0.01-0.5 lower odds, p = .04). Frailty score was also negatively associated with serum losartan and EXP3179 concentrations. For every one standard deviation increase in EXP3179 (ie, 0.0011 ng/μL, based on sample values above detection limit) and EXP3174 (ie, 0.27 ng/μL, based on sample values above detection limit), there was a 0.0035 N (95% CI: 0.0019-0.0051, p < .001) and a 0.0027 N (95% CI: 0.00054-0.0043, p = .007) increase in average knee strength, respectively.
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Affiliation(s)
- Jessica L Lee
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland,USA
- Department of Internal Medicine, Division of Geriatric and Palliative Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Cissy Zhang
- Department of Oncology, Division of Cancer Chemical and Structural Biology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Reyhan Westbrook
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Mariann M Gabrawy
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Lolita Nidadavolu
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Huanle Yang
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Ruth Marx
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Yuqiong Wu
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Nicole M Anders
- Department of Oncology, Division of Cancer Chemical and Structural Biology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- The Johns Hopkins Analytical Pharmacology Core Laboratory, Clinical Pharmacology, Baltimore, MD, USA
| | - Lina Ma
- Department of Geriatrics, Xuanwu Hospital, Capital Medical University, China National Clinical Research Center for Geriatric Disorders, Beijing, China
| | - Marcela-Dávalos Bichara
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Min-Ji Kwak
- Department of Internal Medicine, Division of Geriatric and Palliative Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Brian Buta
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Mohammed Khadeer
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
| | - Gayane Yenokyan
- Johns Hopkins Biostatistics Center, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Jing Tian
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Qian-Li Xue
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Helmy M Siragy
- Department of Medicine, Division of Endocrine and Metabolism, University of Virginia, Charlottesville, Virginia, USA
| | - Robert M Carey
- Department of Medicine, Division of Endocrine and Metabolism, University of Virginia, Charlottesville, Virginia, USA
| | - Rafael de Cabo
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
| | - Luigi Ferrucci
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
| | - Ruin Moaddel
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
| | - Michelle A Rudek
- The Johns Hopkins Analytical Pharmacology Core Laboratory, Clinical Pharmacology, Baltimore, MD, USA
- Department of Medicine, Division of Clinical Pharmacology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Anne Le
- The Johns Hopkins Analytical Pharmacology Core Laboratory, Clinical Pharmacology, Baltimore, MD, USA
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jeremy D Walston
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Peter M Abadir
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Hwang HJ, Kim N, Herman AB, Gorospe M, Lee JS. Factors and Pathways Modulating Endothelial Cell Senescence in Vascular Aging. Int J Mol Sci 2022; 23:ijms231710135. [PMID: 36077539 PMCID: PMC9456027 DOI: 10.3390/ijms231710135] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/31/2022] [Accepted: 09/01/2022] [Indexed: 11/16/2022] Open
Abstract
Aging causes a progressive decline in the structure and function of organs. With advancing age, an accumulation of senescent endothelial cells (ECs) contributes to the risk of developing vascular dysfunction and cardiovascular diseases, including hypertension, diabetes, atherosclerosis, and neurodegeneration. Senescent ECs undergo phenotypic changes that alter the pattern of expressed proteins, as well as their morphologies and functions, and have been linked to vascular impairments, such as aortic stiffness, enhanced inflammation, and dysregulated vascular tone. Numerous molecules and pathways, including sirtuins, Klotho, RAAS, IGFBP, NRF2, and mTOR, have been implicated in promoting EC senescence. This review summarizes the molecular players and signaling pathways driving EC senescence and identifies targets with possible therapeutic value in age-related vascular diseases.
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Affiliation(s)
- Hyun Jung Hwang
- Research Center for Controlling Intercellular Communication, College of Medicine, Inha University, Incheon 22212, Korea
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon 22212, Korea
| | - Nayeon Kim
- Research Center for Controlling Intercellular Communication, College of Medicine, Inha University, Incheon 22212, Korea
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon 22212, Korea
- Program in Biomedical Science and Engineering, College of Medicine, Inha University, Incheon 22212, Korea
| | - Allison B. Herman
- Laboratory of Genetics and Genomics, National Institute on Aging-Intramural Research Program, NIH, Baltimore, MD 21224, USA
| | - Myriam Gorospe
- Laboratory of Genetics and Genomics, National Institute on Aging-Intramural Research Program, NIH, Baltimore, MD 21224, USA
| | - Jae-Seon Lee
- Research Center for Controlling Intercellular Communication, College of Medicine, Inha University, Incheon 22212, Korea
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon 22212, Korea
- Program in Biomedical Science and Engineering, College of Medicine, Inha University, Incheon 22212, Korea
- Correspondence:
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Hu M, Wang Q, Liu B, Ma Q, Zhang T, Huang T, Lv Z, Wang R. Chronic Kidney Disease and Cancer: Inter-Relationships and Mechanisms. Front Cell Dev Biol 2022; 10:868715. [PMID: 35663394 PMCID: PMC9158340 DOI: 10.3389/fcell.2022.868715] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 04/26/2022] [Indexed: 12/20/2022] Open
Abstract
Chronic kidney disease (CKD) has been recognized as an increasingly serious public health problem globally over the decades. Accumulating evidence has shown that the incidence rate of cancer was relatively higher in CKD patients than that in general population, which, mechanistically, may be related to chronic inflammation, accumulation of carcinogenic compounds, oxidative stress, impairment of DNA repair, excessive parathyroid hormone and changes in intestinal microbiota, etc. And in patients with cancer, regardless of tumor types or anticancer treatment, it has been indicated that the morbidity and incidence rate of concomitant CKD was also increased, suggesting a complex inter-relationship between CKD and cancer and arousing increasing attention from both nephrologists and oncologists. This narrative review focused on the correlation between CKD and cancer, and underlying molecular mechanisms, which might provide an overview of novel interdisciplinary research interests and the potential challenges related to the screening and treatment of CKD and cancer. A better understanding of this field might be of help for both nephrologists and oncologists in the clinical practice.
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Affiliation(s)
- Mengsi Hu
- Department of Nephrology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
- Department of Nephrology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Qianhui Wang
- Department of Nephrology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Bing Liu
- Department of Nephrology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
- Department of Nephrology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Qiqi Ma
- Department of Nephrology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Tingwei Zhang
- Department of Nephrology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Tongtong Huang
- Department of Nephrology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Zhimei Lv
- Department of Nephrology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
- Department of Nephrology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- *Correspondence: Zhimei Lv, ; Rong Wang,
| | - Rong Wang
- Department of Nephrology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
- Department of Nephrology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- *Correspondence: Zhimei Lv, ; Rong Wang,
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8
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Pan B, Zheng L, Fang J, Lin Y, Lai H, Gao J, Pan W, Zhang Y, Ni K, Lou C, He D. Azilsartan Suppresses Osteoclastogenesis and Ameliorates Ovariectomy-Induced Osteoporosis by Inhibiting Reactive Oxygen Species Production and Activating Nrf2 Signaling. Front Pharmacol 2021; 12:774709. [PMID: 34899338 PMCID: PMC8662525 DOI: 10.3389/fphar.2021.774709] [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: 09/17/2021] [Accepted: 11/12/2021] [Indexed: 11/13/2022] Open
Abstract
Osteoporosis is characterized by a decrease in bone mass and destruction of the bone microarchitecture, and it commonly occurs in postmenopausal women and the elderly. Overactivation of osteoclasts caused by the inflammatory response or oxidative stress leads to osteoporosis. An increasing number of studies have suggested that intracellular reactive oxygen species (ROS) are strongly associated with osteoclastogenesis. As a novel angiotensin (Ang) II receptor blocker (ARB), azilsartan was reported to be associated with the inhibition of intracellular oxidative stress processes. However, the relationship between azilsartan and osteoclastogenesis is still unknown. In this study, we explored the effect of azilsartan on ovariectomy-induced osteoporosis in mice. Azilsartan significantly inhibited the receptor activator of nuclear factor-κB ligand (RANKL)-mediated osteoclastogenesis and downregulated the expression of osteoclast-associated markers (Nfatc1, c-Fos, and Ctsk) in vitro. Furthermore, azilsartan reduced RANKL-induced ROS production by increasing the expression of nuclear factor erythroid 2-related factor 2 (Nrf2). Mechanistically, azilsartan inhibited the activation of MAPK/NF-κB signaling pathways, while Nrf2 silencing reversed the inhibitory effect of azilsartan on MAPK/NF-κB signaling pathways. Consistent with the in vitro data, azilsartan administration ameliorated ovariectomy (OVX)-induced osteoporosis, and decreased ROS levels in vivo. In conclusion, azilsartan inhibited oxidative stress and may be a novel treatment strategy for osteoporosis caused by osteoclast overactivation.
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Affiliation(s)
- Bin Pan
- Department of Orthopedics, Lishui hospital, Zhejiang University School of Medicine, Lishui, China.,Department of Orthopedic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research of Zhejiang Province, Lishui hospital, Lishui, China
| | - Lin Zheng
- Department of Orthopedics, Lishui hospital, Zhejiang University School of Medicine, Lishui, China.,Department of Orthopedic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jiawei Fang
- Department of Orthopedics, Lishui hospital, Zhejiang University School of Medicine, Lishui, China.,Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research of Zhejiang Province, Lishui hospital, Lishui, China
| | - Ye Lin
- Department of Orthopedics, Lishui hospital, Zhejiang University School of Medicine, Lishui, China.,Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research of Zhejiang Province, Lishui hospital, Lishui, China
| | - Hehuan Lai
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research of Zhejiang Province, Lishui hospital, Lishui, China
| | - Jiawei Gao
- Department of Orthopedics, Lishui hospital, Zhejiang University School of Medicine, Lishui, China.,Department of Orthopedic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research of Zhejiang Province, Lishui hospital, Lishui, China
| | - Wenzheng Pan
- Department of Orthopedics, Lishui hospital, Zhejiang University School of Medicine, Lishui, China.,Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research of Zhejiang Province, Lishui hospital, Lishui, China
| | - Yejin Zhang
- Department of Orthopedics, Lishui hospital, Zhejiang University School of Medicine, Lishui, China.,Department of Orthopedic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research of Zhejiang Province, Lishui hospital, Lishui, China
| | - Kainan Ni
- Department of Orthopedics, Lishui hospital, Zhejiang University School of Medicine, Lishui, China.,Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research of Zhejiang Province, Lishui hospital, Lishui, China
| | - Chao Lou
- Department of Orthopedics, Lishui hospital, Zhejiang University School of Medicine, Lishui, China.,Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research of Zhejiang Province, Lishui hospital, Lishui, China
| | - Dengwei He
- Department of Orthopedics, Lishui hospital, Zhejiang University School of Medicine, Lishui, China.,Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research of Zhejiang Province, Lishui hospital, Lishui, China
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9
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Wang H, Saha AK, Sun X, Kon ND, Ferrario CM, Groban L. Atrial appendage angiotensin-converting enzyme-2, aging and cardiac surgical patients: a platform for understanding aging-related coronavirus disease-2019 vulnerabilities. Curr Opin Anaesthesiol 2021; 34:187-198. [PMID: 33606395 PMCID: PMC8249166 DOI: 10.1097/aco.0000000000000965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
PURPOSE OF REVIEW Hospitalizations for COVID-19 dramatically increase with age. This is likely because of increases in fragility across biological repair systems and a weakened immune system, including loss of the cardiorenal protective arm of the renin--angiotensin system (RAS), composed of angiotensin-converting enzyme-2 (ACE2)/angiotensin-(1--7) [Ang-(1--7)] and its actions through the Mas receptor. The purpose of this review is to explore how cardiac ACE2 changes with age, cardiac diseases, comorbid conditions and pharmaceutical regimens in order to shed light on a potential hormonal unbalance facilitating SARs-CoV-2 vulnerabilities in older adults. RECENT FINDINGS Increased ACE2 gene expression has been reported in human hearts with myocardial infarction, cardiac remodeling and heart failure. We also found ACE2 mRNA in atrial appendage tissue from cardiac surgical patients to be positively associated with age, elevated by certain comorbid conditions (e.g. COPD and previous stroke) and increased in conjunction with patients' chronic use of antithrombotic agents and thiazide diuretics but not drugs that block the renin--angiotensin system. SUMMARY Cardiac ACE2 may have bifunctional roles in COVID-19 as ACE2 not only mediates cellular susceptibility to SARS-CoV-2 infection but also protects the heart via the ACE2/Ang-(1--7) pathway. Linking tissue ACE2 from cardiac surgery patients to their comorbid conditions and medical regimens provides a unique latform to address the influence that altered expression of the ACE2/Ang-(1-7)/Mas receptor axis might have on SARs-CoV-2 vulnerability in older adults.
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Affiliation(s)
- Hao Wang
- Department of Anesthesiology of Wake Forest School of Medicine, Winston Salem, North Carolina
- Department of Internal Medicine-Section of Molecular Medicine of Wake Forest School of Medicine, Winston Salem, North Carolina
| | - Amit K. Saha
- Department of Anesthesiology of Wake Forest School of Medicine, Winston Salem, North Carolina
| | - Xuming Sun
- Department of Anesthesiology of Wake Forest School of Medicine, Winston Salem, North Carolina
| | - Neal D. Kon
- Department of Cardiothoracic Surgery of Wake Forest School of Medicine, Winston Salem, North Carolina
| | - Carlos M. Ferrario
- Department of General Surgery of Wake Forest School of Medicine, Winston Salem, North Carolina
| | - Leanne Groban
- Department of Anesthesiology of Wake Forest School of Medicine, Winston Salem, North Carolina
- Department of Internal Medicine-Section of Molecular Medicine of Wake Forest School of Medicine, Winston Salem, North Carolina
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10
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Izzo C, Vitillo P, Di Pietro P, Visco V, Strianese A, Virtuoso N, Ciccarelli M, Galasso G, Carrizzo A, Vecchione C. The Role of Oxidative Stress in Cardiovascular Aging and Cardiovascular Diseases. Life (Basel) 2021; 11:60. [PMID: 33467601 PMCID: PMC7829951 DOI: 10.3390/life11010060] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/11/2021] [Accepted: 01/12/2021] [Indexed: 12/12/2022] Open
Abstract
Aging can be seen as process characterized by accumulation of oxidative stress induced damage. Oxidative stress derives from different endogenous and exogenous processes, all of which ultimately lead to progressive loss in tissue and organ structure and functions. The oxidative stress theory of aging expresses itself in age-related diseases. Aging is in fact a primary risk factor for many diseases and in particular for cardiovascular diseases and its derived morbidity and mortality. Here we highlight the role of oxidative stress in age-related cardiovascular aging and diseases. We take into consideration the molecular mechanisms, the structural and functional alterations, and the diseases accompanied to the cardiovascular aging process.
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Affiliation(s)
- Carmine Izzo
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (C.I.); (P.V.); (P.D.P.); (V.V.); (A.S.); (N.V.); (M.C.); (G.G.); (A.C.)
| | - Paolo Vitillo
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (C.I.); (P.V.); (P.D.P.); (V.V.); (A.S.); (N.V.); (M.C.); (G.G.); (A.C.)
| | - Paola Di Pietro
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (C.I.); (P.V.); (P.D.P.); (V.V.); (A.S.); (N.V.); (M.C.); (G.G.); (A.C.)
| | - Valeria Visco
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (C.I.); (P.V.); (P.D.P.); (V.V.); (A.S.); (N.V.); (M.C.); (G.G.); (A.C.)
| | - Andrea Strianese
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (C.I.); (P.V.); (P.D.P.); (V.V.); (A.S.); (N.V.); (M.C.); (G.G.); (A.C.)
| | - Nicola Virtuoso
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (C.I.); (P.V.); (P.D.P.); (V.V.); (A.S.); (N.V.); (M.C.); (G.G.); (A.C.)
| | - Michele Ciccarelli
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (C.I.); (P.V.); (P.D.P.); (V.V.); (A.S.); (N.V.); (M.C.); (G.G.); (A.C.)
| | - Gennaro Galasso
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (C.I.); (P.V.); (P.D.P.); (V.V.); (A.S.); (N.V.); (M.C.); (G.G.); (A.C.)
| | - Albino Carrizzo
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (C.I.); (P.V.); (P.D.P.); (V.V.); (A.S.); (N.V.); (M.C.); (G.G.); (A.C.)
- Department of Angio-Cardio-Neurology, Vascular Physiopathology Unit, IRCCS Neuromed, 86077 Pozzilli, Isernia, Italy
| | - Carmine Vecchione
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, 84081 Salerno, Italy; (C.I.); (P.V.); (P.D.P.); (V.V.); (A.S.); (N.V.); (M.C.); (G.G.); (A.C.)
- Department of Angio-Cardio-Neurology, Vascular Physiopathology Unit, IRCCS Neuromed, 86077 Pozzilli, Isernia, Italy
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11
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Badreh F, Joukar S, Badavi M, Rashno M. Restoration of the Renin-Angiotensin System Balance Is a Part of the Effect of Fasting on Cardiovascular Rejuvenation: Role of Age and Fasting Models. Rejuvenation Res 2019; 23:302-312. [PMID: 31571520 DOI: 10.1089/rej.2019.2254] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Intermittent fasting (IF) is an intervention that can be beneficial for health span and mitigate the risk of developing age-related cardiovascular diseases; however, the involved mechanisms are not well understood. The present study investigated the effects of IF regimens on the plasma level of angiotensin II (Ang II), and the expression of Ang II receptors (AT1aR and AT2R) and angiotensin-converting enzyme 2 (ACE2) in the heart and aorta of male, 3-, 12-, and 24-month-old Wistar rats fed ad libitum (AL), fed ad libitum and fasted 1 day per week (FW), or fasted every other day (EOD) for 3 months. Aging was associated with high circulating levels of Ang II, high level of AT1aR protein expression in the heart and aorta, and low level of AT2R protein expression in the heart and aorta. Both FW and EOD decreased Ang II levels (p < 0.01, p < 0.001) and AT1aR protein expression in the heart (p < 0.01, p < 0.001) and aorta (p < 0.001) of old rats. Both FW and EOD increased the expression of AT2R protein in the heart (p < 0.05 and p < 0.001, respectively). However, only EOD increased the expression of AT2R protein (p < 0.05) in the aorta. In the old group, both the FW and EOD regimens induced a significant increase in the expression of ACE2 protein in the heart (p < 0.01, p < 0.001 vs. age-matched AL group, respectively). The results suggest that a part of the recovery effect of fasting on cardiovascular system in old rats is mediated through restoration of the balance of renin-angiotensin system.
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Affiliation(s)
- Firuzeh Badreh
- Physiology Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran.,Department of Physiology and Pharmacology, Afzalipour Faculty of Medicine, Kerman University of Medical Science, Kerman, Iran
| | - Siyavash Joukar
- Neuroscience Research Center, Cardiovascular Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran.,Cardiovascular Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohammad Badavi
- Department of Physiology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,The Persian Gulf Physiology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mohammad Rashno
- Department of Immunology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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12
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Ivanova N, Tchekalarova J. The Potential Therapeutic Capacity of Inhibiting the Brain Renin-Angiotensin System in the Treatment of Co-Morbid Conditions in Epilepsy. CNS Drugs 2019; 33:1101-1112. [PMID: 31680223 DOI: 10.1007/s40263-019-00678-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Epilepsy is one of the most prevalent neurological diseases and although numerous novel anticonvulsants have been approved, the proportion of patients who are refractory to medical treatment of seizures and have progressive co-morbidities such as cognitive impairment and depression remains at about 20-30%. In the last decade, extensive research has identified a therapeutic capacity of the components of the brain renin-angiotensin system (RAS) in seizure- and epilepsy-related phenomena. Alleviating the activity of RAS in the central nervous system is considered to be a potential adjuvant strategy for the treatment of numerous detrimental consequences of epileptogenesis. One of the main advantages of RAS is associated with its modulatory influence on different neurotransmitter systems, thereby exerting a fine-tuning control mechanism for brain excitability. The most recent scientific findings regarding the involvement of the components of brain RAS show that angiotensin II (Ang II), angiotensin-converting enzyme (ACE), Ang II type 1 (AT1) and type 2 (AT2) receptors are involved in the control of epilepsy and its accompanying complications, and therefore they are currently of therapeutic interest in the treatment of this disease. However, data on the role of different components of brain RAS on co-morbid conditions in epilepsy, including hypertension, are insufficient. Experimental and clinical findings related to the involvement of Ang II, ACE, AT1, and AT2 receptors in the control of epilepsy and accompanying complications may point to new therapeutic opportunities and adjuvants for the treatment of common co-morbid conditions of epilepsy.
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Affiliation(s)
- Natasha Ivanova
- Institute of Neurobiology, Bulgarian Academy of Sciences, 23 Acad. G. Bonchev Str., 1113, Sofia, Bulgaria.
| | - Jana Tchekalarova
- Institute of Neurobiology, Bulgarian Academy of Sciences, 23 Acad. G. Bonchev Str., 1113, Sofia, Bulgaria
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13
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Lefranc C, Friederich-Persson M, Palacios-Ramirez R, Nguyen Dinh Cat A. Mitochondrial oxidative stress in obesity: role of the mineralocorticoid receptor. J Endocrinol 2018; 238:R143-R159. [PMID: 29875164 DOI: 10.1530/joe-18-0163] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 06/06/2018] [Indexed: 12/13/2022]
Abstract
Obesity is a multifaceted, chronic, low-grade inflammation disease characterized by excess accumulation of dysfunctional adipose tissue. It is often associated with the development of cardiovascular (CV) disorders, insulin resistance and diabetes. Under pathological conditions like in obesity, adipose tissue secretes bioactive molecules called 'adipokines', including cytokines, hormones and reactive oxygen species (ROS). There is evidence suggesting that oxidative stress, in particular, the ROS imbalance in adipose tissue, may be the mechanistic link between obesity and its associated CV and metabolic complications. Mitochondria in adipose tissue are an important source of ROS and their dysfunction contributes to the pathogenesis of obesity-related type 2 diabetes. Mitochondrial function is regulated by several factors in order to preserve mitochondria integrity and dynamics. Moreover, the renin-angiotensin-aldosterone system is over-activated in obesity. In this review, we focus on the pathophysiological role of the mineralocorticoid receptor in the adipose tissue and its contribution to obesity-associated metabolic and CV complications. More specifically, we discuss whether dysregulation of the mineralocorticoid system within the adipose tissue may be the upstream mechanism and one of the early events in the development of obesity, via induction of oxidative stress and mitochondrial dysfunction, thus impacting on systemic metabolism and the CV system.
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Affiliation(s)
- Clara Lefranc
- INSERMUMRS 1138, Centre de Recherche des Cordeliers, Pierre et Marie Curie University, Paris Descartes University, Paris, France
| | | | - Roberto Palacios-Ramirez
- INSERMUMRS 1138, Centre de Recherche des Cordeliers, Pierre et Marie Curie University, Paris Descartes University, Paris, France
| | - Aurelie Nguyen Dinh Cat
- INSERMUMRS 1138, Centre de Recherche des Cordeliers, Pierre et Marie Curie University, Paris Descartes University, Paris, France
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14
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Liao CY, Chung CH, Wu CC, Lin FH, Tsao CH, Wang CC, Chien WC. Protective effect of N-acetylcysteine on progression to end-stage renal disease: Necessity for prospective clinical trial. Eur J Intern Med 2017. [PMID: 28633804 DOI: 10.1016/j.ejim.2017.06.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND We aimed to evaluate the potential benefits of N-acetylcysteine (NAC) on the risk of chronic kidney disease (CKD) progression to dialysis-requiring end-stage renal disease (ESRDd). METHODS In a population-based cohort study of 145,062 individuals, 123,608 CKD patients who were followed up for 10years were included, and CKD patients treated with NAC (ICD-9-CM) were compared with those who were not treated. Using propensity score matching, we analyzed the predictors of CKD progression to ESRDd by Cox proportional hazards regression with adjustments for sex, age, and comorbidities, and evaluated the effect of NAC using cumulative defined daily dose (cDDD). RESULTS NAC use was associated with a reduced risk for progression to ESRDd [hazard ratio (HR), 0.819; 95% confidence interval (CI), 0.781-0.965; P=0.017]. Risk reduction was proportional to cDDD in NAC users compared with that in NAC non users (HR, 0.835, 0.811, and 0.799 for cDDD 91-180, 181-360, and >360, respectively; P for trend=0.018). Risk reduction was apparent in women (P=0.001) and in younger-aged patients of 18-29years (P=0.021) and 30-39years (P=0.033), in the presence of hypertension (P=0.003), and in the absence of diabetes mellitus (P=0.042) and congestive heart failure (P=0.036). CONCLUSION NAC use was associated with a reduced risk for progression to ESRDd. These results, obtained from retrospective data, indicate that a prospective study is warranted.
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Affiliation(s)
- Chen-Yi Liao
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan; Division of Nephrology, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Chi-Hsiang Chung
- School of Public Health, National Defense Medical Center, Taipei, Taiwan; Taiwanese Injury Prevention and Safety Promotion Association, Taiwan
| | - Chai-Chao Wu
- Division of Nephrology, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Fu-Huang Lin
- School of Public Health, National Defense Medical Center, Taipei, Taiwan
| | - Chang-Huei Tsao
- Department of Medical Research, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan; Department of Microbiology & Immunology, National Defense Medical Center, Taiwan
| | - Chih-Chiang Wang
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan; Division of Nephrology, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.
| | - Wu-Chien Chien
- School of Public Health, National Defense Medical Center, Taipei, Taiwan; Department of Medical Research, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.
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15
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Labandeira-Garcia JL, Rodríguez-Perez AI, Garrido-Gil P, Rodriguez-Pallares J, Lanciego JL, Guerra MJ. Brain Renin-Angiotensin System and Microglial Polarization: Implications for Aging and Neurodegeneration. Front Aging Neurosci 2017; 9:129. [PMID: 28515690 PMCID: PMC5413566 DOI: 10.3389/fnagi.2017.00129] [Citation(s) in RCA: 155] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 04/18/2017] [Indexed: 12/12/2022] Open
Abstract
Microglia can transform into proinflammatory/classically activated (M1) or anti-inflammatory/alternatively activated (M2) phenotypes following environmental signals related to physiological conditions or brain lesions. An adequate transition from the M1 (proinflammatory) to M2 (immunoregulatory) phenotype is necessary to counteract brain damage. Several factors involved in microglial polarization have already been identified. However, the effects of the brain renin-angiotensin system (RAS) on microglial polarization are less known. It is well known that there is a “classical” circulating RAS; however, a second RAS (local or tissue RAS) has been observed in many tissues, including brain. The locally formed angiotensin is involved in local pathological changes of these tissues and modulates immune cells, which are equipped with all the components of the RAS. There are also recent data showing that brain RAS plays a major role in microglial polarization. Level of microglial NADPH-oxidase (Nox) activation is a major regulator of the shift between M1/proinflammatory and M2/immunoregulatory microglial phenotypes so that Nox activation promotes the proinflammatory and inhibits the immunoregulatory phenotype. Angiotensin II (Ang II), via its type 1 receptor (AT1), is a major activator of the NADPH-oxidase complex, leading to pro-oxidative and pro-inflammatory effects. However, these effects are counteracted by a RAS opposite arm constituted by Angiotensin II/AT2 receptor signaling and Angiotensin 1–7/Mas receptor (MasR) signaling. In addition, activation of prorenin-renin receptors may contribute to activation of the proinflammatory phenotype. Aged brains showed upregulation of AT1 and downregulation of AT2 receptor expression, which may contribute to a pro-oxidative pro-inflammatory state and the increase in neuron vulnerability. Several recent studies have shown interactions between the brain RAS and different factors involved in microglial polarization, such as estrogens, Rho kinase (ROCK), insulin-like growth factor-1 (IGF-1), tumor necrosis factor α (TNF)-α, iron, peroxisome proliferator-activated receptor gamma, and toll-like receptors (TLRs). Metabolic reprogramming has recently been involved in the regulation of the neuroinflammatory response. Interestingly, we have recently observed a mitochondrial RAS, which is altered in aged brains. In conclusion, dysregulation of brain RAS plays a major role in aging-related changes and neurodegeneration by exacerbation of oxidative
stress (OS) and neuroinflammation, which may be attenuated by pharmacological manipulation of RAS components.
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Affiliation(s)
- Jose L Labandeira-Garcia
- Laboratory of Neuroanatomy and Experimental Neurology, Department of Morphological Sciences, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de CompostelaSantiago de Compostela, Spain.,Networking Research Center on Neurodegenerative Diseases (CIBERNED)Madrid, Spain
| | - Ana I Rodríguez-Perez
- Laboratory of Neuroanatomy and Experimental Neurology, Department of Morphological Sciences, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de CompostelaSantiago de Compostela, Spain.,Networking Research Center on Neurodegenerative Diseases (CIBERNED)Madrid, Spain
| | - Pablo Garrido-Gil
- Laboratory of Neuroanatomy and Experimental Neurology, Department of Morphological Sciences, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de CompostelaSantiago de Compostela, Spain.,Networking Research Center on Neurodegenerative Diseases (CIBERNED)Madrid, Spain
| | - Jannette Rodriguez-Pallares
- Laboratory of Neuroanatomy and Experimental Neurology, Department of Morphological Sciences, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de CompostelaSantiago de Compostela, Spain.,Networking Research Center on Neurodegenerative Diseases (CIBERNED)Madrid, Spain
| | - Jose L Lanciego
- Networking Research Center on Neurodegenerative Diseases (CIBERNED)Madrid, Spain.,Neurosciences Division, Center for Applied Medical Research (CIMA), University of NavarraPamplona, Spain
| | - Maria J Guerra
- Laboratory of Neuroanatomy and Experimental Neurology, Department of Morphological Sciences, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de CompostelaSantiago de Compostela, Spain.,Networking Research Center on Neurodegenerative Diseases (CIBERNED)Madrid, Spain
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16
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Wakayama K, Shimamura M, Suzuki JI, Watanabe R, Koriyama H, Akazawa H, Nakagami H, Mochizuki H, Isobe M, Morishita R. Angiotensin II Peptide Vaccine Protects Ischemic Brain Through Reducing Oxidative Stress. Stroke 2017; 48:1362-1368. [DOI: 10.1161/strokeaha.116.016269] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 01/21/2017] [Accepted: 02/06/2017] [Indexed: 01/20/2023]
Abstract
Background and Purpose—
Medication nonadherence is one of major risk factors for the poor outcome in ischemic stroke. Vaccination is expected to solve such a problem because of its long-lasting effects, but its effect on ischemic brain damage is still unknown. Here, we focused on vaccination for renin–angiotensin system and examined the effects of angiotensin II (Ang II) peptide vaccine in permanent middle cerebral artery occlusion model in rats.
Methods—
Male Wistar rats were exposed to permanent middle cerebral artery occlusion after 3× injections of Ang II peptide vaccine, and the serum or brain level of anti–Ang II antibody was examined. The effects of the vaccine were evaluated by differences in infarction volume, brain renin–angiotensin system components, and markers for neurodegeneration and oxidative stress.
Results—
Ang II vaccination successfully produced anti–Ang II antibodies in serum without concomitant change in blood pressure. Sufficient production of serum anti–Ang II antibody led to reduction of infarct volume and induced the penetration of anti–Ang II antibody in ischemic hemisphere, with suppressed expression of Ang II type 1 receptor mRNA. Vaccinated rats with sufficient antibody production showed the reduction of Fluoro-Jade B–positive cells, spectrin fragmentation, 4-hydroxynonenal-positive cells, and
Nox 2
mRNA expression.
Conclusions—
Our findings indicate that Ang II vaccination exerts neuroprotective and antioxidative effects in cerebral ischemia, with renin–angiotensin system blockade by penetration of anti–Ang II antibodies into ischemic brain lesion. Ang II peptide vaccination could be a promising approach to treat ischemic stroke.
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Affiliation(s)
- Kouji Wakayama
- From the Department of Advanced Clinical Science and Therapeutics (K.W., J.-i.S.) and Department of Cardiovascular Medicine (H.A.), Graduate School of Medicine, The University of Tokyo, Japan; Department of Neurology (M.S., H.M.), Department of Health Development and Medicine (M.S., H.K., H.N.), and Department of Clinical Gene Therapy (R.M.), Graduate School of Medicine, Osaka University, Japan; and Department of Human Genetics and Disease Diversity (R.W.) and Department of Cardiovascular Medicine
| | - Munehisa Shimamura
- From the Department of Advanced Clinical Science and Therapeutics (K.W., J.-i.S.) and Department of Cardiovascular Medicine (H.A.), Graduate School of Medicine, The University of Tokyo, Japan; Department of Neurology (M.S., H.M.), Department of Health Development and Medicine (M.S., H.K., H.N.), and Department of Clinical Gene Therapy (R.M.), Graduate School of Medicine, Osaka University, Japan; and Department of Human Genetics and Disease Diversity (R.W.) and Department of Cardiovascular Medicine
| | - Jun-ichi Suzuki
- From the Department of Advanced Clinical Science and Therapeutics (K.W., J.-i.S.) and Department of Cardiovascular Medicine (H.A.), Graduate School of Medicine, The University of Tokyo, Japan; Department of Neurology (M.S., H.M.), Department of Health Development and Medicine (M.S., H.K., H.N.), and Department of Clinical Gene Therapy (R.M.), Graduate School of Medicine, Osaka University, Japan; and Department of Human Genetics and Disease Diversity (R.W.) and Department of Cardiovascular Medicine
| | - Ryo Watanabe
- From the Department of Advanced Clinical Science and Therapeutics (K.W., J.-i.S.) and Department of Cardiovascular Medicine (H.A.), Graduate School of Medicine, The University of Tokyo, Japan; Department of Neurology (M.S., H.M.), Department of Health Development and Medicine (M.S., H.K., H.N.), and Department of Clinical Gene Therapy (R.M.), Graduate School of Medicine, Osaka University, Japan; and Department of Human Genetics and Disease Diversity (R.W.) and Department of Cardiovascular Medicine
| | - Hiroshi Koriyama
- From the Department of Advanced Clinical Science and Therapeutics (K.W., J.-i.S.) and Department of Cardiovascular Medicine (H.A.), Graduate School of Medicine, The University of Tokyo, Japan; Department of Neurology (M.S., H.M.), Department of Health Development and Medicine (M.S., H.K., H.N.), and Department of Clinical Gene Therapy (R.M.), Graduate School of Medicine, Osaka University, Japan; and Department of Human Genetics and Disease Diversity (R.W.) and Department of Cardiovascular Medicine
| | - Hiroshi Akazawa
- From the Department of Advanced Clinical Science and Therapeutics (K.W., J.-i.S.) and Department of Cardiovascular Medicine (H.A.), Graduate School of Medicine, The University of Tokyo, Japan; Department of Neurology (M.S., H.M.), Department of Health Development and Medicine (M.S., H.K., H.N.), and Department of Clinical Gene Therapy (R.M.), Graduate School of Medicine, Osaka University, Japan; and Department of Human Genetics and Disease Diversity (R.W.) and Department of Cardiovascular Medicine
| | - Hironori Nakagami
- From the Department of Advanced Clinical Science and Therapeutics (K.W., J.-i.S.) and Department of Cardiovascular Medicine (H.A.), Graduate School of Medicine, The University of Tokyo, Japan; Department of Neurology (M.S., H.M.), Department of Health Development and Medicine (M.S., H.K., H.N.), and Department of Clinical Gene Therapy (R.M.), Graduate School of Medicine, Osaka University, Japan; and Department of Human Genetics and Disease Diversity (R.W.) and Department of Cardiovascular Medicine
| | - Hideki Mochizuki
- From the Department of Advanced Clinical Science and Therapeutics (K.W., J.-i.S.) and Department of Cardiovascular Medicine (H.A.), Graduate School of Medicine, The University of Tokyo, Japan; Department of Neurology (M.S., H.M.), Department of Health Development and Medicine (M.S., H.K., H.N.), and Department of Clinical Gene Therapy (R.M.), Graduate School of Medicine, Osaka University, Japan; and Department of Human Genetics and Disease Diversity (R.W.) and Department of Cardiovascular Medicine
| | - Mitsuaki Isobe
- From the Department of Advanced Clinical Science and Therapeutics (K.W., J.-i.S.) and Department of Cardiovascular Medicine (H.A.), Graduate School of Medicine, The University of Tokyo, Japan; Department of Neurology (M.S., H.M.), Department of Health Development and Medicine (M.S., H.K., H.N.), and Department of Clinical Gene Therapy (R.M.), Graduate School of Medicine, Osaka University, Japan; and Department of Human Genetics and Disease Diversity (R.W.) and Department of Cardiovascular Medicine
| | - Ryuichi Morishita
- From the Department of Advanced Clinical Science and Therapeutics (K.W., J.-i.S.) and Department of Cardiovascular Medicine (H.A.), Graduate School of Medicine, The University of Tokyo, Japan; Department of Neurology (M.S., H.M.), Department of Health Development and Medicine (M.S., H.K., H.N.), and Department of Clinical Gene Therapy (R.M.), Graduate School of Medicine, Osaka University, Japan; and Department of Human Genetics and Disease Diversity (R.W.) and Department of Cardiovascular Medicine
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17
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Abstract
PURPOSE OF REVIEW In 1954 Harman proposed the free radical theory of aging, and in 1972 he suggested that mitochondria are both the source and the victim of toxic free radicals. Interestingly, hypertension is an age-associated disease and clinical data show that by age 70, 70% of the population has hypertension and this is accompanied by oxidative stress. Antioxidant therapy, however, is not currently available and common antioxidants such as ascorbate and vitamin E are ineffective in preventing hypertension. The present review focuses on the molecular mechanisms of mitochondrial oxidative stress and the therapeutic potential of targeting mitochondria in hypertension. RECENT FINDINGS Over the past several years, we have shown that the mitochondria become dysfunctional in hypertension and have defined a novel role of mitochondrial superoxide radicals in this disease. We have shown that genetic manipulation of mitochondrial antioxidant enzyme superoxide dismutase affects blood pressure, and have developed mitochondria-targeted therapies such as mitochondrial superoxide dismutase mimetics that effectively lower blood pressure. However, the specific mechanism of mitochondrial oxidative stress in hypertension remains unclear. Recent animal and clinical studies have demonstrated several hormonal, metabolic, inflammatory, and environmental pathways contributing to mitochondrial dysfunction and oxidative stress. SUMMARY Nutritional supplements, calorie restriction, and life style change are the most effective preventive strategies to improve mitochondrial function and reduce mitochondrial oxidative stress. Aging associated mitochondrial dysfunction, however, reduces the efficacy of these strategies. Therefore, we propose that new classes of mitochondria-targeted antioxidants can provide a high therapeutic potential to improve endothelial function and reduce hypertension.
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Takata K, Imaizumi S, Zhang B, Miura SI, Saku K. Stabilization of high-risk plaques. Cardiovasc Diagn Ther 2016; 6:304-21. [PMID: 27500090 DOI: 10.21037/cdt.2015.10.03] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The prevalence of atherosclerotic cardiovascular diseases (ASCVDs) is increasing globally and they have become the leading cause of death in most countries. Numerous experimental and clinical studies have been conducted to identify major risk factors and effective control strategies for ASCVDs. The development of imaging modalities with the ability to determine the plaque composition enables us to further identify high-risk plaque and evaluate the effectiveness of different treatment strategies. While intensive lipid-lowering by statins can stabilize or even regress plaque by various mechanisms, such as the reduction of lipid accumulation in a necrotic lipid core, the reduction of inflammation, and improvement of endothelial function, there are still considerable residual risks that need to be understood. We reviewed important findings regarding plaque vulnerability and some encouraging emerging approaches for plaque stabilization.
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Affiliation(s)
- Kohei Takata
- Department of Cardiology, Fukuoka University School of Medicine, Fukuoka 814-0180, Japan
| | - Satoshi Imaizumi
- Department of Cardiology, Fukuoka University School of Medicine, Fukuoka 814-0180, Japan
| | - Bo Zhang
- Department of Biochemistry, Fukuoka University School of Medicine, Fukuoka 814-0180, Japan
| | - Shin-Ichiro Miura
- Department of Cardiology, Fukuoka University School of Medicine, Fukuoka 814-0180, Japan
| | - Keijiro Saku
- Department of Cardiology, Fukuoka University School of Medicine, Fukuoka 814-0180, Japan
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19
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Tchekalarova JD, Ivanova NM, Pechlivanova DM, Atanasova D, Lazarov N, Kortenska L, Mitreva R, Lozanov V, Stoynev A. Antiepileptogenic and neuroprotective effects of losartan in kainate model of temporal lobe epilepsy. Pharmacol Biochem Behav 2014; 127:27-36. [DOI: 10.1016/j.pbb.2014.10.005] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 10/06/2014] [Accepted: 10/12/2014] [Indexed: 11/26/2022]
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20
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Tchekalarova J, Ivanova N, Pechlivanova D, Ilieva K, Atanasova M. Strain-Dependent Effects of Sub-chronically Infused Losartan Against Kainic Acid-Induced Seizures, Oxidative Stress, and Heat Shock Protein 72 Expression. Cell Mol Neurobiol 2013; 34:133-42. [DOI: 10.1007/s10571-013-9994-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 09/26/2013] [Indexed: 01/25/2023]
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21
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Montez P, Vázquez-Medina JP, Rodríguez R, Thorwald MA, Viscarra JA, Lam L, Peti-Peterdi J, Nakano D, Nishiyama A, Ortiz RM. Angiotensin receptor blockade recovers hepatic UCP2 expression and aconitase and SDH activities and ameliorates hepatic oxidative damage in insulin resistant rats. Endocrinology 2012; 153:5746-59. [PMID: 23087176 PMCID: PMC3512060 DOI: 10.1210/en.2012-1390] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Metabolic syndrome (MetS) is commonly associated with elevated renin-angiotensin system, oxidative stress, and steatohepatitis with down-regulation of uncoupling proteins (UCPs). However, the mechanisms linking renin-angiotensin system, steatosis, and UCP2 to hepatic oxidative damage during insulin resistance are not described. To test the hypothesis that angiotensin receptor activation contributes to decreased hepatic UCP2 expression and aconitase activity and to increased oxidative damage after increased glucose intake in a model of MetS, lean and obese Long Evans rats (n = 10/group) were randomly assigned to the following groups: 1) untreated Long Evans Tokushima Otsuka (lean, strain control), 2) untreated Otsuka Long Evans Tokushima Fatty (OLETF) (MetS model), 3) OLETF + angiotensin receptor blocker (ARB) (10 mg olmesartan/kg·d × 6 wk), 4) OLETF + high glucose (HG) (5% in drinking water × 6 wk), and 5) OLETF + ARB + HG (ARB/HG × 6 wk). HG increased body mass (37%), plasma triglycerides (TGs) (35%), plasma glycerol (87%), plasma free fatty acids (28%), and hepatic nitrotyrosine (74%). ARB treatment in HG decreased body mass (12%), plasma TG (15%), plasma glycerol (23%), plasma free fatty acids (14%), and hepatic TG content (42%), suggesting that angiotensin receptor type 1 (AT1) activation and increased adiposity contribute to the development of obesity-related dyslipidemia. ARB in HG also decreased hepatic nitrotyrosine and increased hepatic UCP2 expression (59%) and aconitase activity (40%), as well as antioxidant enzyme activities (50-120%), suggesting that AT1 activation also contributes to protein oxidation, impaired lipid metabolism, and antioxidant metabolism in the liver. Thus, in addition to promoting obesity-related hypertension, AT1 activation may also impair lipid metabolism and antioxidant capacity, resulting in steatosis via decreased UCP2 and tricarboxylic acid cycle activity.
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Affiliation(s)
- Priscilla Montez
- Department of Molecular and Cellular Biology, University of California, Merced, CA 95343, USA
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22
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Kim JM, Heo HS, Ha YM, Ye BH, Lee EK, Choi YJ, Yu BP, Chung HY. Mechanism of Ang II involvement in activation of NF-κB through phosphorylation of p65 during aging. AGE (DORDRECHT, NETHERLANDS) 2012; 34:11-25. [PMID: 21318332 PMCID: PMC3260361 DOI: 10.1007/s11357-011-9207-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2010] [Accepted: 01/03/2011] [Indexed: 05/30/2023]
Abstract
Angiotensin II (Ang II), a major effector of the renin-angiotensin system, is now recognized as a pro-inflammatory mediator. This Ang II signaling, which causes transcription of pro-inflammatory genes, is regulated through nuclear factor-κB (NF-κB). At present, the molecular mechanisms underlying the effect of aging on Ang II signaling and NF-κB activation are not fully understood. The purpose of this study was to document altered molecular events involved in age-related changes in Ang II signaling and NF-κB activation. Experimentations were carried out using kidney tissues from Fischer 344 rats at 6, 12, 18, and 24 months of age, and the rat endothelial cell line, YPEN-1 for the detailed molecular work. Results show that increases in Ang II and Ang II type 1 receptor during aging were accompanied by the generation of reactive species. Increased Ang II activated NF-κB by phosphorylating IκBα and p65. Increased phosphorylation of p65 at Ser 536 was mediated by the enhanced phosphorylation of IκB kinase αβ, while phosphorylation site Ser 276 of p65 was mediated by upregulated mitogen-activated and stress-activated protein kinase-1. These altered molecular events in aged animals were partly verified by experiments using YPEN-1 cells. Collectively, our findings provide molecular insights into the pro-inflammatory actions of Ang II, actions that influence the phosphorylation of p65-mediated NF-κB activation during aging. Our study demonstrates the age-related pleiotropic nature of the physiologically important Ang II can change into a deleterious culprit that contributes to an increased incidence of many chronic diseases such as atherosclerosis, diabetes, and dementia.
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Affiliation(s)
- Ji Min Kim
- Molecular Inflammation Research Center for Aging Intervention (MRCA), Pusan National University, San 30, Jangjun-dong, Gumjung-gu, Busan, 609-735 South Korea
- College of Pharmacy, Pusan National University, San 30, Jangjun-dong, Gumjung-gu, Busan, 609-735 South Korea
| | - Hyoung-Sam Heo
- Molecular Inflammation Research Center for Aging Intervention (MRCA), Pusan National University, San 30, Jangjun-dong, Gumjung-gu, Busan, 609-735 South Korea
- College of Pharmacy, Pusan National University, San 30, Jangjun-dong, Gumjung-gu, Busan, 609-735 South Korea
| | - Young Mi Ha
- Molecular Inflammation Research Center for Aging Intervention (MRCA), Pusan National University, San 30, Jangjun-dong, Gumjung-gu, Busan, 609-735 South Korea
- College of Pharmacy, Pusan National University, San 30, Jangjun-dong, Gumjung-gu, Busan, 609-735 South Korea
| | - Byeong Hyeok Ye
- Molecular Inflammation Research Center for Aging Intervention (MRCA), Pusan National University, San 30, Jangjun-dong, Gumjung-gu, Busan, 609-735 South Korea
- College of Pharmacy, Pusan National University, San 30, Jangjun-dong, Gumjung-gu, Busan, 609-735 South Korea
| | - Eun Kyeong Lee
- Molecular Inflammation Research Center for Aging Intervention (MRCA), Pusan National University, San 30, Jangjun-dong, Gumjung-gu, Busan, 609-735 South Korea
- College of Pharmacy, Pusan National University, San 30, Jangjun-dong, Gumjung-gu, Busan, 609-735 South Korea
| | - Yeon Ja Choi
- Molecular Inflammation Research Center for Aging Intervention (MRCA), Pusan National University, San 30, Jangjun-dong, Gumjung-gu, Busan, 609-735 South Korea
- College of Pharmacy, Pusan National University, San 30, Jangjun-dong, Gumjung-gu, Busan, 609-735 South Korea
| | - Byung Pal Yu
- Department of Physiology, University of Texas Health Science Center, San Antonio, TX 78229-3900 USA
| | - Hae Young Chung
- Molecular Inflammation Research Center for Aging Intervention (MRCA), Pusan National University, San 30, Jangjun-dong, Gumjung-gu, Busan, 609-735 South Korea
- College of Pharmacy, Pusan National University, San 30, Jangjun-dong, Gumjung-gu, Busan, 609-735 South Korea
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23
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Thornton SN. Angiotensin inhibition and longevity: a question of hydration. Pflugers Arch 2010; 461:317-24. [PMID: 21165644 DOI: 10.1007/s00424-010-0911-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Revised: 11/25/2010] [Accepted: 11/29/2010] [Indexed: 01/07/2023]
Abstract
With the advancement of medical and investigative science, it is somewhat surprising that although it is possible to stabilise medical patients with hypertension and the associated kidney dysfunction, obesity, diabetes and even cancer, there is still no clear method of significantly reducing these chronic disease pathologies, and thus, extending life expectancy. There is one hormone common to these pathologies, the antagonism of which goes some way to clinical improvements, and this is angiotensin, which is released during hypovolaemia. Angiotensin antagonists are used to treat many of these pathologies, and it has been shown in the obesity literature that angiotensin antagonists decrease weight, but also increase the drinking of water. Increased cellular hydration, and hence, improved mitochondrial metabolism could be one of the mechanisms for the reduction in weight seen in these studies, as well as for reducing the other pathologies, all showing metabolic dysfunction. It appears that the application of straightforward physiological regulation might be an appropriate medical approach to the prevention of hypertension, kidney disease, obesity, diabetes and cancer, and thus, to an increased life expectancy.
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24
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Hellström JK, Shikov AN, Makarova MN, Pihlanto AM, Pozharitskaya ON, Ryhänen EL, Kivijärvi P, Makarov VG, Mattila PH. Blood pressure-lowering properties of chokeberry (Aronia mitchurinii, var. Viking). J Funct Foods 2010. [DOI: 10.1016/j.jff.2010.04.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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25
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Conner KR, Payne VS, Forbes ME, Robbins ME, Riddle DR. Effects of the AT1 receptor antagonist L-158,809 on microglia and neurogenesis after fractionated whole-brain irradiation. Radiat Res 2010; 173:49-61. [PMID: 20041759 DOI: 10.1667/rr1821.1] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Cognitive dysfunction develops in approximately 50% of patients who receive fractionated whole-brain irradiation and survive 6 months or more. The mechanisms underlying these deficits are unknown. A recent study demonstrated that treatment with the angiotensin II type 1 receptor antagonist (AT(1)RA) L-158,809 before, during and after fractionated whole-brain irradiation prevents or ameliorates radiation-induced cognitive deficits in adult rats. Given that (1) AT(1)RAs may function as anti-inflammatory drugs, (2) inflammation is thought to contribute to radiation injury, and (3) radiation-induced inflammation alters progenitor cell populations, we tested whether the cognitive benefits of L-158,809 treatment were associated with amelioration of the sustained neuroinflammation and changes in neurogenesis that are induced by fractionated whole-brain irradiation. In rats examined 28 and 54 weeks after irradiation, L-158,809 treatment did not alter the effects of radiation on the number and activation of microglia in the perirhinal cortex and hippocampus, nor did it prevent the radiation-induced decrease in proliferating cells and immature neurons in the hippocampus. These findings suggest that L-158,809 does not prevent or ameliorate radiation-induced cognitive deficits by modulation of chronic inflammatory mechanisms, but rather may reduce radiation-induced changes that occur earlier in the postirradiation period and that lead to cognitive dysfunction.
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Affiliation(s)
- Kelly R Conner
- Program in Neuroscience, Wake Forest University School of Medicine, Winston-Salem, North Carolina 27157-1010, USA
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26
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Cassis P, Conti S, Remuzzi G, Benigni A. Angiotensin receptors as determinants of life span. Pflugers Arch 2009; 459:325-32. [DOI: 10.1007/s00424-009-0725-4] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Accepted: 08/26/2009] [Indexed: 01/21/2023]
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27
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Min LJ, Mogi M, Iwai M, Horiuchi M. Signaling mechanisms of angiotensin II in regulating vascular senescence. Ageing Res Rev 2009; 8:113-21. [PMID: 19162241 DOI: 10.1016/j.arr.2008.12.002] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2008] [Revised: 12/10/2008] [Accepted: 12/16/2008] [Indexed: 02/07/2023]
Abstract
Angiotensin (Ang) II, the major effector of the rennin-angiotensin-aldosterone system (RAAS), has multiple functions in regulating cardiovascular hemodynamics and structure. Recent evidence strongly supports that Ang II promotes the onset and progression of vascular senescence, which is associated with vascular functional and structural changes, contributing to age-related vascular diseases. The vast majority of the cardiovascular actions of Ang II, including vascular senescence, are mediated by the Ang II type-1 (AT(1)) receptor. Similar to its growth-promoting process, the signaling mechanisms of AT(1) receptor-mediated vascular senescence-promoting effects involve activation of small G-protein Ras such as Ki-ras2A, mitogen-activated protein kinases (MAPK) such as extracellular signal-regulated kinase 1/2, and transcription factors including nuclear factor (NF)-kappaB and activator protein (AP)-1, and increased generation of reactive oxygen species. Moreover, AT(1) receptor stimulation has been suggested to inactivate cyclin-dependent kinase complexes by up-regulation of cell cycle regulators such as p53 and p21, resulting in cellular senescence. Furthermore, the interaction between Ang II and aldosterone (Aldo) in their contribution to cardiovascular pathophysiology has been highlighted. Aldo can interact with Ang II signaling via a genomic mechanism mediated by the mineralocorticoid receptor (MR). Aldo via MR couples with the AT(1) receptor to elicit the Ras/NF-kappaB, AP-1/p53/p21 pathway involving oxidative stress, leading to synergistic promotion of vascular senescence. Although the precise mechanisms controlling cellular senescence are currently poorly understood, this article reviews recent findings on the signaling mechanisms elicited by RAAS from the perspective of AT(1) receptor blockers and/or MR blockers in the treatment of age-related vascular diseases.
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28
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Meyer KD, Zhang L. Short- and long-term adverse effects of cocaine abuse during pregnancy on the heart development. Ther Adv Cardiovasc Dis 2009; 3:7-16. [PMID: 19144667 DOI: 10.1177/1753944708099877] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The effect of cocaine on the developing fetus is a topic of considerable interest and debate. One of the potential effects of fetal cocaine exposure is damage to the developing heart. This review provides an overview of the current understanding of the short- and long-term effects of fetal cocaine exposure on the heart in both humans and animal models. Human studies are still preliminary but have suggested that fetal cocaine exposure impacts on the developing heart. Studies in animal models provide strong evidence for a programming effect resulting in detrimental long-term changes to the heart induced by fetal cocaine exposure. In the rat model, fetal cocaine results in apoptosis in the term heart, left ventricular remodeling and myocyte hypertrophy, as well as increased sensitivity to ischemia/reperfusion injury in the adult male offspring. The rat model has also shown evidence of epigenetic modifications in response to intrauterine cocaine. Increased DNA methylation of promoter regions leads to a long-term decrease in the expression of the cardioprotective gene, PKCepsilon. The current data shows fetal cocaine exposure has significant immediate and long-term cardiac consequences in animal models and while human studies are still incomplete they suggest this phenomenon may also be significant in humans exposed to cocaine during development.
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Affiliation(s)
- Kurt D Meyer
- Center for Perinatal Biology, Department of Physiology/Pharmacology and Biochemistry, Loma Linda University, School of Medicine, Loma Linda, California 92350, USA.
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29
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Iwanami J, Mogi M, Iwai M, Horiuchi M. Inhibition of the renin-angiotensin system and target organ protection. Hypertens Res 2009; 32:229-37. [PMID: 19262496 DOI: 10.1038/hr.2009.5] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The renin-angiotensin system (RAS) is involved in the pathological mechanisms of target organ damage, as well as in the induction of hypertension. RAS inhibition by angiotensin converting enzyme (ACE) inhibitors and angiotensin (Ang) II receptor blockers can prevent tissue damage by inhibition of Ang II type 1 receptor signaling. A beneficial effect of RAS inhibition on the heart, vasculature and kidney in cardiovascular disease has been reported. However, RAS inhibition can also prevent fibroproliferative diseases and damage of other tissues, such as brain, adipose tissue and muscle, because local RAS has an important role in tissue damage compared with circulating RAS. Moreover, other players, such as Ang II type 2 receptor signaling, aldosterone and ACE2 have been highlighted. Furthermore, there has also been a focus on the emerging concept of regulation of RAS, such as receptor-interacting proteins and receptor modifications, in the new discovery of therapeutic agents for tissue protection. The RAS has a pivotal role in various target organ damage, with complicated mechanisms; therefore, blockade of RAS may be therapeutically effective in preventing organ damage, as well as in having an antihypertensive effect.
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Affiliation(s)
- Jun Iwanami
- Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Tohon, Ehime, Japan
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30
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Abstract
New components and functions of the renin-angiotensin system (RAS) are still being unravelled. The classical RAS as it looked in the middle 1970s consisted of circulating renin, acting on angiotensinogen to produce angiotensin I, which in turn was converted into angiotensin II (Ang II) by angiotensin-converting enzyme (ACE). Ang II, still considered the main effector of RAS was believed to act only as a circulating hormone via angiotensin receptors, AT1 and AT2. Since then, an expanded view of RAS has gradually emerged. Local tissue RAS systems have been identified in most organs. Recently, evidence for an intracellular RAS has been reported. The new expanded view of RAS therefore covers both endocrine, paracrine and intracrine functions. Other peptides of RAS have been shown to have biological actions; angiotensin 2-8 heptapeptide (Ang III) has actions similar to those of Ang II. Further, the angiotensin 3-8 hexapeptide (Ang IV) exerts its actions via insulin-regulated amino peptidase receptors. Finally, angiotensin 1-7 (Ang 1-7) acts via mas receptors. The discovery of another ACE2 was an important complement to this picture. The recent discovery of renin receptors has made our view of RAS unexpectedly complex and multilayered. The importance of RAS in cardiovascular disease has been demonstrated by the clinical benefits of ACE inhibitors and AT1 receptor blockers. Great expectations are now generated by the introduction of renin inhibitors. Indeed, RAS regulates much more and diverse physiological functions than previously believed.
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Affiliation(s)
- F Fyhrquist
- Minerva Institute for Medical Research and Department of Internal Medicine, Helsinki University Central Hospital, Helsinki, Finland.
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31
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Min LJ, Mogi M, Iwanami J, Li JM, Sakata A, Fujita T, Tsukuda K, Iwai M, Horiuchi M. Angiotensin II Type 2 Receptor Deletion Enhances Vascular Senescence by Methyl Methanesulfonate Sensitive 2 Inhibition. Hypertension 2008; 51:1339-44. [DOI: 10.1161/hypertensionaha.107.105692] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Li-Juan Min
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Ehime, Japan
| | - Masaki Mogi
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Ehime, Japan
| | - Jun Iwanami
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Ehime, Japan
| | - Jian-Mei Li
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Ehime, Japan
| | - Akiko Sakata
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Ehime, Japan
| | - Teppei Fujita
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Ehime, Japan
| | - Kana Tsukuda
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Ehime, Japan
| | - Masaru Iwai
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Ehime, Japan
| | - Masatsugu Horiuchi
- From the Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University, Graduate School of Medicine, Ehime, Japan
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32
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Allard J, Buléon M, Cellier E, Renaud I, Pecher C, Praddaude F, Conti M, Tack I, Girolami JP. ACE inhibitor reduces growth factor receptor expression and signaling but also albuminuria through B2-kinin glomerular receptor activation in diabetic rats. Am J Physiol Renal Physiol 2007; 293:F1083-92. [PMID: 17596523 DOI: 10.1152/ajprenal.00401.2006] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Diabetic nephropathy (DN) is associated with increased oxidative stress, overexpression and activation of growth factor receptors, including those for transforming growth factor-β1 (TGF-β-RII), platelet-derived growth factor (PDGF-R), and insulin-like growth factor (IGF1-R). These pathways are believed to represent pathophysiological determinants of DN. Beyond perfect glycemic control, angiotensin-converting enzyme inhibitors (ACEI) are the most efficient treatment to delay glomerulosclerosis. Since their mechanisms of action remain uncertain, we investigated the effect of ACEI on the glomerular expression of these growth factor pathways in a model of streptozotocin-induced diabetes in rats. The early phase of diabetes was found to be associated with an increase in glomerular expression of IGF1-R, PDGF-R, and TGF-β-RII and activation of IRS1, Erk 1/2, and Smad 2/3. These changes were significantly reduced by ACEI treatment. Furthermore, ACEI stimulated glutathione peroxidase activity, suggesting a protective role against oxidative stress. ACEI decreased ANG II production but also increased bradykinin bioavailability by reducing its degradation. Thus the involvement of the bradykinin pathway was investigated using coadministration of HOE-140, a highly specific nonpeptidic B2-kinin receptor antagonist. Almost all the previously described effects of ACEI were abolished by HOE-140, as was the increase in glutathione peroxidase activity. Moreover, the well-established ability of ACEI to reduce albuminuria was also prevented by HOE-140. Taken together, these data demonstrate that, in the early phase of diabetes, ACEI reverse glomerular overexpression and activation of some critical growth factor pathways and increase protection against oxidative stress and that these effects involve B2-kinin receptor activation.
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Affiliation(s)
- Julien Allard
- Institut National de la Santé et de la Recherche Médicale U858 eq 5, Louis Bugnard Institute, Toulouse Cedex 4, France
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33
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Chen G, Bridenbaugh EA, Akintola AD, Catania JM, Vaidya VS, Bonventre JV, Dearman AC, Sampson HW, Zawieja DC, Burghardt RC, Parrish AR. Increased susceptibility of aging kidney to ischemic injury: identification of candidate genes changed during aging, but corrected by caloric restriction. Am J Physiol Renal Physiol 2007; 293:F1272-81. [PMID: 17670906 PMCID: PMC2758575 DOI: 10.1152/ajprenal.00138.2007] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Aging is associated with an increased incidence and severity of acute renal failure. However, the molecular mechanism underlying the increased susceptibility to injury remains undefined. These experiments were designed to investigate the influence of age on the response of the kidney to ischemic injury and to identify candidate genes that may mediate this response. Renal slices prepared from young (5 mo), aged ad libitum (aged-AL; 24 mo), and aged caloric-restricted (aged-CR; 24 mo) male Fischer 344 rats were subjected to ischemic stress (100% N(2)) for 0-60 min. As assessed by biochemical and histological evaluation, slices from aged-AL rats were more susceptible to injury than young counterparts. Importantly, caloric restriction attenuated the increased susceptibility to injury. In an attempt to identify the molecular pathway(s) underlying this response, microarray analysis was performed on tissue harvested from the same animals used for the viability experiments. RNA was isolated and the corresponding cDNA was hybridized to CodeLink Rat Whole Genome Bioarray slides. Subsequent gene expression analysis was performed using GeneSpring software. Using two-sample t-tests and a twofold cut-off, the expression of 92 genes was changed during aging and attenuated by caloric restriction, including claudin-7, kidney injury molecule-1 (Kim-1), and matrix metalloproteinase-7 (MMP-7). Claudin-7 gene expression peaked at 18 mo; however, increased protein expression in certain tubular epithelial cells was seen at 24 mo. Kim-1 gene expression was not elevated at 8 or 12 mo but was at 18 and 24 mo. However, changes in Kim-1 protein expression were only seen at 24 mo and corresponded to increased urinary levels. Importantly, these changes were attenuated by caloric restriction. MMP-7 gene expression was decreased at 8 mo, but an age-dependent increase was seen at 24 mo. Increased MMP-7 protein expression in tubular epithelial cells at 24 mo was correlated with the gene expression pattern. In summary, we identified genes changed by aging and changes attenuated by caloric restriction. This will facilitate investigation into the molecular mechanism mediating the age-related increase in susceptibility to injury.
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Affiliation(s)
- G. Chen
- Department of Systems Biology and Translational Medicine, College of Medicine, Texas A&M University System Health Science Center, College Station
| | - E. A. Bridenbaugh
- Department of Systems Biology and Translational Medicine, College of Medicine, Texas A&M University System Health Science Center, College Station
| | - A. D. Akintola
- Department of Systems Biology and Translational Medicine, College of Medicine, Texas A&M University System Health Science Center, College Station
| | - J. M. Catania
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine, Texas A&M University, College Station, Texas
| | - V. S. Vaidya
- Renal Division, Brigham and Women’s Hospital, Harvard Institutes of Medicine, Harvard Medical School, Boston, Massachusetts
| | - J. V. Bonventre
- Renal Division, Brigham and Women’s Hospital, Harvard Institutes of Medicine, Harvard Medical School, Boston, Massachusetts
| | - A. C. Dearman
- Department of Systems Biology and Translational Medicine, College of Medicine, Texas A&M University System Health Science Center, College Station
| | - H. W. Sampson
- Department of Systems Biology and Translational Medicine, College of Medicine, Texas A&M University System Health Science Center, College Station
| | - D. C. Zawieja
- Department of Systems Biology and Translational Medicine, College of Medicine, Texas A&M University System Health Science Center, College Station
| | - R. C. Burghardt
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine, Texas A&M University, College Station, Texas
| | - A. R. Parrish
- Department of Systems Biology and Translational Medicine, College of Medicine, Texas A&M University System Health Science Center, College Station
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Rouyer O, Zoll J, Daussin F, Damgé C, Helms P, Talha S, Rasseneur L, Piquard F, Geny B. Effect of angiotensin-converting enzyme inhibition on skeletal muscle oxidative function and exercise capacity in streptozotocin-induced diabetic rats. Exp Physiol 2007; 92:1047-56. [PMID: 17675412 DOI: 10.1113/expphysiol.2007.038851] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Since exercise capacity is related to the mitochondrial respiration rate in skeletal muscle and both parameters are potentially modulated by the onset of diabetes and by inhibition of the angiotensin-converting enzyme (ACE), we investigated whether skeletal muscle oxidative functions and exercise capacities are impaired in chronic streptozotocin-induced diabetic (STZ) rats and whether ACE inhibition could reverse such abnormalities. The ACE inhibitor perindopril (2 mg kg(-1) day(-1)) was given for a period of 5 weeks to 7-month-old STZ rats (DIA-PE, n = 8) whose haemodynamic function, skeletal muscle mitochondrial function and exercise capacity were compared with those of untreated diabetic (DIA, n = 8) and control rats (CONT, n = 8). Increased arterial blood pressure (157 +/- 12 versus 130 +/- 6 mmHg, P < 0.05) and reduced exercise capacity (29 +/- 2 versus 91 +/- 2 min, respectively, P < 0.01) were observed in DIA compared with CONT. The oxidative capacity of the gastrocnemius muscle was significantly reduced in DIA compared with CONT rats (5.4 +/- 0.5 versus 10.6 +/- 0.7 micromol O(2) min(-1)(g dry weight)(-1), respectively, P < 0.001). Moreover, the coupling between oxidation and phosphorylation was significantly impaired in DIA (-52%, P < 0.001). Angiotensin-converting enzyme inhibition (ACEi) normalized blood pressure without improving mitochondrial function (4.3 +/- 0.8 micromol O(2) min(-1) (g dry weight)(-1) in DIA-PE rats) but reduced exercise capacity to even lower levels (10 +/- 1 min, P < 0.01). Exercise capacity correlated positively with blood pressure in DIA-PE (r = 0.79, P < 0.05). In experimental type 1 diabetic rats, both skeletal muscle mitochondrial respiration and exercise capacity are impaired. The ACEi failed to restore the muscular function and worsened exercise capacity. Further studies will be useful to determine whether an inadequate muscular blood flow secondary to the reduction in mean systemic blood pressure can explain these results.
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Affiliation(s)
- Olivier Rouyer
- Physiology Institute and CHRU-Strasbourg, 1 PL de l'Hôpital, Strasbourg 67091, France
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Loizzo MR, Said A, Tundis R, Rashed K, Statti GA, Hufner A, Menichini F. Inhibition of angiotensin converting enzyme (ACE) by flavonoids isolated from Ailanthus excelsa (Roxb) (Simaroubaceae). Phytother Res 2007; 21:32-6. [PMID: 17072829 DOI: 10.1002/ptr.2008] [Citation(s) in RCA: 125] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
In our screening program for antihypertensive properties of plants, the leaves of Ailanthus excelsa (Roxb), a plant used in Egyptian traditional medicine, were analysed. Chromatographic separation of A. excelsa MeOH extract yielded six flavonoids for the first time from this species, namely apigenin, luteolin, kaempferol-3-O-alpha-arabinopyranoside, kaempferol-3-O-beta-galactopyranoside, quercetin-3-O-alpha-arabinopyranoside and luteolin-7-O-beta-glucopyranoside. The in vitro hypotensive activities of the MeOH extract and the isolated compounds were elucidated. All the flavonoids tested exhibited ACE inhibitory activity, in particular the most active compound was kaempferol-3-O-beta-galactopyranoside with an IC(50) value of 260 microm.
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Affiliation(s)
- Monica Rosa Loizzo
- Department of Pharmaceutical Sciences, University of Calabria, Rende (CS), Italy.
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Djamali A, Sadowski EA, Muehrer RJ, Reese S, Smavatkul C, Vidyasagar A, Fain SB, Lipscomb RC, Hullett DH, Samaniego-Picota M, Grist TM, Becker BN. BOLD-MRI assessment of intrarenal oxygenation and oxidative stress in patients with chronic kidney allograft dysfunction. Am J Physiol Renal Physiol 2006; 292:F513-22. [PMID: 17062846 DOI: 10.1152/ajprenal.00222.2006] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Blood oxygen level-dependent (BOLD) magnetic resonance imaging (MRI) uses deoxyhemoglobin as an endogenous contrast agent for the noninvasive assessment of tissue oxygen bioavailability. We hypothesized that intrarenal oxygenation was impaired in patients with chronic allograft nephropathy (CAN). Ten kidney-transplant recipients with CAN and nine healthy volunteers underwent BOLD-MRI. Medullary R2* (MR2*) and cortical R2* (CR2*) levels (measures directly proportional to tissue deoxyhemoglobin levels) were determined alongside urine and serum markers of oxidative stress (OS): hydrogen peroxide (H(2)O(2)), F(2)-isoprostanes, total nitric oxide (NO), heat shock protein 27 (HSP27), and total antioxidant property (TAOP). Mean MR2* and CR2* levels were significantly decreased in CAN (increased local oxyhemoglobin concentration) compared with healthy volunteers (20.7 +/- 1.6 vs. 23.1 +/- 1.8/s, P = 0.03 and 15.9 +/- 1.9 vs. 13.6 +/- 2.3/s, P = 0.05, respectively). There was a significant increase in serum and urine levels of H(2)O(2) and serum HSP27 levels in patients with CAN. Conversely, urine NO levels and TAOP were significantly increased in healthy volunteers. Multiple linear regression analyses showed a significant association between MR2* and CR2* levels and serum/urine biomarkers of OS. BOLD-MRI demonstrated significant changes in medullary and cortical oxygen bioavailability in allografts with CAN. These correlated with serum/urine biomarkers of OS, suggesting an association between intrarenal oxygenation and OS.
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Affiliation(s)
- Arjang Djamali
- Department of Medicine, University of Wisconsin-Madison, Madison, WI 53713, USA.
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Haddad GE, Scheer A, Clarke E, Arguinzoni JK, Sobrian SK. Prenatal cocaine alone and combined with nicotine alters ANG II and IGF-1 induced left atrial contractions in aging male offspring. Can J Physiol Pharmacol 2006; 83:957-65. [PMID: 16391704 DOI: 10.1139/y05-059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Prenatal cocaine or nicotine affects inotropic activity in the hearts of rat offspring. However, the long-term consequence of this exposure on the cardiac response to hormonal challenge is unknown. We assessed the inotropic effects of angiotensin II (ANG II) and insulin-like growth factor 1 (IGF-1) in the left atria of 19.0-24.5 month-old male rats exposed on gestation days 8-21 to 1 of 6 treatments: low cocaine (LC) (20 mg/kg) or high cocaine (HC) (40 mg/kg); 20 mg/kg cocaine and high nicotine (5 mg/kg nicotine) (LC/HN); 40 mg/kg cocaine and low nicotine (2.5 mg/kg nicotine) (HC/LN); pair fed: yoked to HC (PF); saline: injection of 0.9% NaCl (SAL). Isometric contractions were assessed by electrical stimulation of isolated left atria superfused with Tyrode solution (control) to which ANG II (10-7 mol/L, 20 min) and IGF-1 (10-8 mol/L, 20 min) in the presence of ANG II were added sequentially. Offspring in all cocaine groups showed a higher peak tension development (PTD) to ANG II than PF controls. This increase in PTD was attenuated by subsequent addition of IGF-1 in all except HC offspring. However, with the HC/LN combination the IGF-1 effect on PTD was again evident. The velocities of contraction and relaxation were positively affected by ANG II only in the combined prenatal drug groups; IGF-1 reduced only contraction velocity. Our data demonstrate that IGF-1 reverses the positive inotropic effect of ANG-II in atrial muscle of aging rats and that gestational exposure to only high doses of cocaine eliminates this protective response. It appears that combined prenatal exposure to cocaine and nicotine does not exacerbate the decline in cardiac function and responsiveness to inotropic drugs seen in the aging heart.
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Affiliation(s)
- Georges E Haddad
- Department of Physiology and Biophysics, Howard University College of Medicine, Washington, DC 20059, USA.
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Muñoz A, Rey P, Guerra MJ, Mendez-Alvarez E, Soto-Otero R, Labandeira-Garcia JL. Reduction of dopaminergic degeneration and oxidative stress by inhibition of angiotensin converting enzyme in a MPTP model of parkinsonism. Neuropharmacology 2006; 51:112-20. [PMID: 16678218 DOI: 10.1016/j.neuropharm.2006.03.004] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2005] [Revised: 02/24/2006] [Accepted: 03/07/2006] [Indexed: 02/07/2023]
Abstract
There is growing evidence indicating that oxidative stress is a key contributor to the pathogenesis and progression of Parkinson's disease. The brain, and particularly the basal ganglia, possesses a local rennin-angiotensin system. Angiotensin activates NAD(P)H-dependent oxidases, which are a major intracellular source of superoxide, and angiotensin converting enzyme inhibitors (ACEIs) have shown antioxidant properties. We treated mice with MPTP and the ACEI captopril to study the possible neuroprotective and antioxidant effects of the latter on the dopaminergic system. Pre-treatment with captopril induced a significant reduction in the MPTP-induced loss of dopaminergic neurons in the substantia nigra and a significant reduction in the loss of dopaminergic terminals in the striatum. Furthermore, captopril reduced the MPTP-induced increase in the levels of major oxidative stress indicators (i.e. lipid peroxidation and protein oxidation) in the ventral midbrain and the striatum. Captopril did not reduce striatal MPP(+) levels, MAO-B activity or dopamine transporter activity, which may reduce MPTP neurotoxicity. Our results suggest that angiotensin-converting enzyme inhibitors may be useful for treatment of Parkinson's disease, and that further investigation should focus on the neuroprotective capacity of these compounds.
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Affiliation(s)
- Ana Muñoz
- Laboratory of Neuroanatomy and Experimental Neurology, Department of Morphological Sciences, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
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Actis-Goretta L, Ottaviani JI, Fraga CG. Inhibition of angiotensin converting enzyme activity by flavanol-rich foods. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2006; 54:229-34. [PMID: 16390204 DOI: 10.1021/jf052263o] [Citation(s) in RCA: 202] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Angiotensin converting enzyme (ACE) activity was evaluated in the presence of flavanol-rich foods, i.e., wines, chocolates, and teas, and of purified flavonoids. All foods assayed inhibited ACE activity, red wines being more effective than white wine, and green tea more effective than black tea. The inhibition of ACE activity was associated with both phenolic and flavanol content in the foods. When isolated polyphenols were assayed, procyanidins (dimer and hexamer) and epigallocatechin significantly inhibited enzyme activity; similar concentrations of (+)-catechin, (-)-epicatechin, gallic acid, chlorogenic acid, caffeic acid, quercetin, kaempferol, and resveratrol were ineffective. When ACE activity was assayed in rat kidney membranes in the presence of chocolate extracts or purified procyanidins, it was observed that the inhibition depended on the chocolate content of flavanols and the number of flavanol units constituting the procyanidin. These experiments demonstrate that flavanols either isolated or present in foods could inhibit ACE activity. The occurrence of such inhibition in vivo needs to be determined, although is supported by the association between the consumption of flavanol-rich foods and reductions in blood pressure observed in several experimental models.
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Affiliation(s)
- Lucas Actis-Goretta
- Physical Chemistry-PRALIB, School of Pharmacy and Biochemistry, University of Buenos Aires, Argentina, Junín 956, 1113 Buenos Aires, Argentina
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Cha YM, Dzeja PP, Redfield MM, Shen WK, Terzic A. Bioenergetic protection of failing atrial and ventricular myocardium by vasopeptidase inhibitor omapatrilat. Am J Physiol Heart Circ Physiol 2005; 290:H1686-92. [PMID: 16339841 DOI: 10.1152/ajpheart.00384.2005] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Deficient bioenergetic signaling contributes to myocardial dysfunction and electrical instability in both atrial and ventricular cardiac chambers. Yet, approaches capable to prevent metabolic distress are only partially established. Here, in a canine model of tachycardia-induced congestive heart failure, we compared atrial and ventricular bioenergetics and tested the efficacy of metabolic rescue with the vasopeptidase inhibitor omapatrilat. Despite intrinsic differences in energy metabolism, failing atria and ventricles demonstrated profound bioenergetic deficiency with reduced ATP and creatine phosphate levels and compromised adenylate kinase and creatine kinase catalysis. Depressed phosphotransfer enzyme activities correlated with reduced tissue ATP levels, whereas creatine phosphate inversely related with atrial and ventricular load. Chronic treatment with omapatrilat maintained myocardial ATP, the high-energy currency, and protected adenylate and creatine kinase phosphotransfer capacity. Omapatrilat-induced bioenergetic protection was associated with maintained atrial and ventricular structural integrity, albeit without full recovery of the creatine phosphate pool. Thus therapy with omapatrilat demonstrates the benefit in protecting phosphotransfer enzyme activities and in preventing impairment of atrial and ventricular bioenergetics in heart failure.
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Affiliation(s)
- Yong-Mei Cha
- Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
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Percy C, Pat B, Poronnik P, Gobe G. Role of oxidative stress in age-associated chronic kidney pathologies. Adv Chronic Kidney Dis 2005; 12:78-83. [PMID: 15719337 DOI: 10.1053/j.ackd.2004.10.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The kidneys exhibit age-associated deterioration in function via a loss of 20% to 25% kidney mass, particularly from the renal cortex and increased fibrosis. Oxidative stress has been found to mediate age-associated renal cell injury and cell death, particularly apoptosis. Oxidative stress results from an imbalance between the levels of free radicals generated during aerobic metabolism, inflammation, and infection and the safe breakdown of these species by endogenous and exogenous scavengers. Other factors may influence these pathologies. For example, growth hormone and caloric restriction have been shown to influence life span, although neither method of prolonging life is likely to find general acceptance in humans. Some genetic knockout models offer promise; for example, knockout of the p66 isoform of the Shc gene in mice increases life span by 30%, but appetite, size, and fertility are retained. Whether the increase in life span is via increased kidney health is not yet clear, but decreasing the age-related renal pathologies will no doubt aid in increasing life span and health in general. This review looks at the role and modulation of factors that influence life span, in particular modulation of oxidative stress, with particular relevance to age-related renal pathologies.
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Affiliation(s)
- Christine Percy
- Department of Molecular and Cellular Pathology, The University of Queensland School of Medicine, Herston, Australia
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