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Dou B, Zhu Y, Sun M, Wang L, Tang Y, Tian S, Wang F. Mechanisms of Flavonoids and Their Derivatives in Endothelial Dysfunction Induced by Oxidative Stress in Diabetes. Molecules 2024; 29:3265. [PMID: 39064844 PMCID: PMC11279171 DOI: 10.3390/molecules29143265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2024] [Revised: 07/02/2024] [Accepted: 07/05/2024] [Indexed: 07/28/2024] Open
Abstract
Diabetic complications pose a significant threat to life and have a negative impact on quality of life in individuals with diabetes. Among the various factors contributing to the development of these complications, endothelial dysfunction plays a key role. The main mechanism underlying endothelial dysfunction in diabetes is oxidative stress, which adversely affects the production and availability of nitric oxide (NO). Flavonoids, a group of phenolic compounds found in vegetables, fruits, and fungi, exhibit strong antioxidant and anti-inflammatory properties. Several studies have provided evidence to suggest that flavonoids have a protective effect on diabetic complications. This review focuses on the imbalance between reactive oxygen species and the antioxidant system, as well as the changes in endothelial factors in diabetes. Furthermore, we summarize the protective mechanisms of flavonoids and their derivatives on endothelial dysfunction in diabetes by alleviating oxidative stress and modulating other signaling pathways. Although several studies underline the positive influence of flavonoids and their derivatives on endothelial dysfunction induced by oxidative stress in diabetes, numerous aspects still require clarification, such as optimal consumption levels, bioavailability, and side effects. Consequently, further investigations are necessary to enhance our understanding of the therapeutic potential of flavonoids and their derivatives in the treatment of diabetic complications.
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Affiliation(s)
| | | | | | | | | | | | - Furong Wang
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan 250300, China
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Zhang Y, Jiao X, Liu J, Feng G, Luo X, Zhang M, Zhang B, Huang L, Long Q. A new direction in Chinese herbal medicine ameliorates for type 2 diabetes mellitus: Focus on the potential of mitochondrial respiratory chain complexes. JOURNAL OF ETHNOPHARMACOLOGY 2024; 321:117484. [PMID: 38012971 DOI: 10.1016/j.jep.2023.117484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 11/15/2023] [Accepted: 11/20/2023] [Indexed: 11/29/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Diabetes is a common chronic disease. Chinese herbal medicine (CHM) has a history of several thousand years in the treatment of diabetes, and active components with hypoglycemic effects extracted from various CHM, such as polysaccharides, flavonoids, terpenes, and steroidal saponins, have been widely used in the treatment of diabetes. AIM OF THE STUDY Research exploring the potential of various CHM compounds to regulate the mitochondrial respiratory chain complex to improve type 2 diabetes mellitus (T2DM). MATERIALS AND METHODS The literature data were primarily obtained from authoritative databases such as PubMed, CNKI, Wanfang, and others within the last decade. The main keywords used include "type 2 diabetes mellitus", "Chinese medicine", "Chinese herbal medicine", "mitochondrial respiratory chain complex", and "mitochondrial dysfunction". RESULTS Chinese herbal medicine primarily regulates the activity of mitochondrial respiratory chain complexes in various tissues such as liver, adipose tissue, skeletal muscle, pancreatic islets, and small intestine. It improves cellular energy metabolism through hypoglycemic, antioxidant, anti-inflammatory and lipid-modulating effects. Different components of CHM can regulate the same mitochondrial respiratory chain complexes, while the same components of a particular CHM can regulate different complex activities. The active components of CHM target different mitochondrial respiratory chain complexes, regulate their aberrant changes and effectively improve T2DM and its complications. CONCLUSION Chinese herbal medicine can modulate the function of mitochondrial respiratory chain complexes in various cell types and exert their hypoglycemic effects through various mechanisms. CHM has significant therapeutic potential in regulating mitochondrial respiratory chain complexes to improve T2DM, but further research is needed to explore the underlying mechanisms and conduct clinical trials to assess the safety and efficacy of these medications. This provides new perspectives and opportunities for personalized improvement and innovative developments in diabetes management.
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Affiliation(s)
- Yinghui Zhang
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine (Institute of Chinese Medicine), Guangdong Pharmaceutical University, Guangzhou, 510006, China; Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Chinese Medicine for Metabolic Diseases, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Xinyue Jiao
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine (Institute of Chinese Medicine), Guangdong Pharmaceutical University, Guangzhou, 510006, China; Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Chinese Medicine for Metabolic Diseases, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Jianying Liu
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine (Institute of Chinese Medicine), Guangdong Pharmaceutical University, Guangzhou, 510006, China; Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Chinese Medicine for Metabolic Diseases, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Gang Feng
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine (Institute of Chinese Medicine), Guangdong Pharmaceutical University, Guangzhou, 510006, China; Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Chinese Medicine for Metabolic Diseases, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Xia Luo
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine (Institute of Chinese Medicine), Guangdong Pharmaceutical University, Guangzhou, 510006, China; Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Chinese Medicine for Metabolic Diseases, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Mingyue Zhang
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine (Institute of Chinese Medicine), Guangdong Pharmaceutical University, Guangzhou, 510006, China; Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Chinese Medicine for Metabolic Diseases, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Binzhi Zhang
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine (Institute of Chinese Medicine), Guangdong Pharmaceutical University, Guangzhou, 510006, China; Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Chinese Medicine for Metabolic Diseases, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Lizhen Huang
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Qinqiang Long
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine (Institute of Chinese Medicine), Guangdong Pharmaceutical University, Guangzhou, 510006, China; Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Chinese Medicine for Metabolic Diseases, Guangdong Pharmaceutical University, Guangzhou, 510006, China.
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Lin QR, Jia LQ, Lei M, Gao D, Zhang N, Sha L, Liu XH, Liu YD. Natural products as pharmacological modulators of mitochondrial dysfunctions for the treatment of diabetes and its complications: An update since 2010. Pharmacol Res 2024; 200:107054. [PMID: 38181858 DOI: 10.1016/j.phrs.2023.107054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 12/12/2023] [Accepted: 12/31/2023] [Indexed: 01/07/2024]
Abstract
Diabetes, characterized as a well-known chronic metabolic syndrome, with its associated complications pose a substantial and escalating health and healthcare challenge on a global scale. Current strategies addressing diabetes are mainly symptomatic and there are fewer available curative pharmaceuticals for diabetic complications. Thus, there is an urgent need to identify novel pharmacological targets and agents. The impaired mitochondria have been associated with the etiology of diabetes and its complications, and the intervention of mitochondrial dysfunction represents an attractive breakthrough point for the treatments of diabetes and its complications. Natural products (NPs), with multicenter characteristics, multi-pharmacological activities and lower toxicity, have been caught attentions as the modulators of mitochondrial functions in the therapeutical filed of diabetes and its complications. This review mainly summarizes the recent progresses on the potential of 39 NPs and 2 plant-extracted mixtures to improve mitochondrial dysfunction against diabetes and its complications. It is expected that this work may be useful to accelerate the development of innovative drugs originated from NPs and improve upcoming therapeutics in diabetes and its complications.
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Affiliation(s)
- Qian-Ru Lin
- Department of Neuroendocrine Pharmacology, School of Pharmacy, China Medical University, Shenyang, Liaoning 110122, China
| | - Lian-Qun Jia
- Key Laboratory of Ministry of Education for TCM Viscera-State Theory and Applications, Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning 116600, China
| | - Ming Lei
- Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou 646000, China
| | - Di Gao
- Department of Neuroendocrine Pharmacology, School of Pharmacy, China Medical University, Shenyang, Liaoning 110122, China
| | - Nan Zhang
- Department of Neuroendocrine Pharmacology, School of Pharmacy, China Medical University, Shenyang, Liaoning 110122, China
| | - Lei Sha
- Department of Neuroendocrine Pharmacology, School of Pharmacy, China Medical University, Shenyang, Liaoning 110122, China
| | - Xu-Han Liu
- Department of Endocrinology, Dalian Municipal Central Hospital, Dalian, Liaoning 116033, China.
| | - Yu-Dan Liu
- Department of Neuroendocrine Pharmacology, School of Pharmacy, China Medical University, Shenyang, Liaoning 110122, China.
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Boeing T, Reis Lívero FAD, de Souza P, de Almeida DAT, Donadel G, Lourenço ELB, Gasparotto Junior A. Natural Products as Modulators of Mitochondrial Dysfunctions Associated with Cardiovascular Diseases: Advances and Opportunities. J Med Food 2023; 26:279-298. [PMID: 37186894 DOI: 10.1089/jmf.2022.0022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023] Open
Abstract
The mitochondria have an important role in modulating cell cycle progression, cell survival, and apoptosis. In the adult heart, the cardiac mitochondria have a unique spatial arrangement and occupy nearly one-third the volume of a cardiomyocyte, being highly efficient for converting the products of glucose or fatty acid metabolism into adenosine triphosphate (ATP). In cardiomyocytes, the decline of mitochondrial function reduces ATP generation and increases the production of reactive oxygen species, which generates impaired heart function. This is because mitochondria play a key role in maintaining cytosolic calcium concentration and modulation of muscle contraction, as ATP is required to dissociate actin from myosin. Beyond that, mitochondria have a significant role in cardiomyocyte apoptosis because it is evident that patients who have cardiovascular diseases (CVDs) have increased mitochondrial DNA damage to the heart and aorta. Many studies have shown that natural products have mitochondria-modulating effects in cardiac diseases, determining them as potential candidates for new medicines. This review outlines the leading plant secondary metabolites and natural compounds derived from microorganisms as modulators of mitochondrial dysfunctions associated with CVDs.
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Affiliation(s)
- Thaise Boeing
- Graduate Program in Pharmaceutical Sciences, Chemical-Pharmaceutical Research Nucleus, University of Vale do Itajaí, Itajaí, Brazil
| | - Francislaine Aparecida Dos Reis Lívero
- Laboratory of Pre-Clinical Research of Natural Products, Postgraduate Program in Animal Science with Emphasis on Bioactive Products, Paranaense University, Umuarama, Brazil
| | - Priscila de Souza
- Graduate Program in Pharmaceutical Sciences, Chemical-Pharmaceutical Research Nucleus, University of Vale do Itajaí, Itajaí, Brazil
| | - Danielle Ayr Tavares de Almeida
- Laboratory of Cardiovascular Pharmacology (LaFaC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, Brazil
| | - Guilherme Donadel
- Laboratory of Pre-Clinical Research of Natural Products, Postgraduate Program in Animal Science with Emphasis on Bioactive Products, Paranaense University, Umuarama, Brazil
| | - Emerson Luiz Botelho Lourenço
- Laboratory of Pre-Clinical Research of Natural Products, Postgraduate Program in Animal Science with Emphasis on Bioactive Products, Paranaense University, Umuarama, Brazil
| | - Arquimedes Gasparotto Junior
- Laboratory of Cardiovascular Pharmacology (LaFaC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, Brazil
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Zhu A, Qi S, Li W, Chen D, Zheng X, Xu J, Feng Y. Hyperglycemia-induced endothelial exosomes trigger trophoblast dysregulation and abnormal placentation through PUM2-mediated repression of SOX2. Hum Exp Toxicol 2023; 42:9603271221149656. [PMID: 36607285 DOI: 10.1177/09603271221149656] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Hyperglycemia is closely related to adverse pregnancy outcomes including pre-eclampsia (PE), a life-threatening complication with a substantial morbidity and mortality. However, the pathogenesis of abnormal placentation in gestational diabetes mellitus (GDM)-associated PE remains elusive. METHOD Here we isolated exosomes from the human umbilical vein endothelial cells (HUVECs) treated with normal level of glucose (NG) and high levels of glucose (HG). The exosomes were added to HTR-8a/SVneo cells, a trophoblast cell line. High-throughput RNA-sequencing was performed to analyzed the changed RNAs in the exosomes and exosome-treated HTR-8a/SVneo cells. HTR-8a/SVneo cell phenotypes were evaluated from the aspects of cell proliferation, cell invasion and DNA damage. RESULTS After treatment with HG, the changed RNAs in exosomes was enriched in RNA stabilization and oxidative stress. The altered RNAs in the HTR-8a/SVneo cells treated with exosomes from HG-induced HUVECs were enriched in pathways related to cell adhesion, migration, DNA damage response and angiogenesis. The HG-induced exosomes impaired the proliferation and invasion of HTR-8a cells and caused the DNA damage. HG up-regulated PUM2 in the exosomes and exosome-treated HTR-8a/SVneo cells. PUM2 interacted with SOX2 mRNA, resulting in the mRNA degradation. Overexpression of SOX2 prevented the damage to HTR-8a/SVneo cells caused by the exosomes from HG-induced HUVECs. CONCLUSIONS We demonstrate that high glucose-induced endothelial exosomes mediate abnormal phenotypes of trophoblasts through PUM2-mediated repression of SOX2. Our results reveal a novel regulatory mechanism of hyperglycemia in development of abnormal placentation and provide potential targets for preventing adverse pregnancy outcomes.
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Affiliation(s)
- Aibing Zhu
- Department of Anesthesiology, Wuxi Maternal and Child Health Hospital, Wuxi School of Medicine, 12461Jiangnan University, Jiangsu, China
| | - Suwan Qi
- Department of Obstetrics and Gynecology, Wuxi Maternal and Child Health Hospital, Wuxi School of Medicine, 12461Jiangnan University, Jiangsu, China
| | - Wenjuan Li
- Department of Obstetrics and Gynecology, Wuxi Maternal and Child Health Hospital, Wuxi School of Medicine, 12461Jiangnan University, Jiangsu, China
| | - Dashu Chen
- Department of Obstetrics and Gynecology, Wuxi Maternal and Child Health Hospital, Wuxi School of Medicine, 12461Jiangnan University, Jiangsu, China
| | - Xiaomin Zheng
- Department of Obstetrics and Gynecology, Wuxi Maternal and Child Health Hospital, Wuxi School of Medicine, 12461Jiangnan University, Jiangsu, China
| | - Jianjuan Xu
- Department of Obstetrics and Gynecology, Wuxi Maternal and Child Health Hospital, Wuxi School of Medicine, 12461Jiangnan University, Jiangsu, China
| | - Yaling Feng
- Department of Obstetrics and Gynecology, Wuxi Maternal and Child Health Hospital, Wuxi School of Medicine, 12461Jiangnan University, Jiangsu, China
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Shan Y, Cui J, Kang X, Tang W, Lu Y, Gao Y, Chen L. Aquaporin-8 overexpression is involved in vascular structure and function changes in placentas of gestational diabetes mellitus patients. Open Life Sci 2022; 17:1473-1486. [DOI: 10.1515/biol-2022-0522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 09/20/2022] [Accepted: 09/26/2022] [Indexed: 11/16/2022] Open
Abstract
Abstract
To study the role and mechanism of aquaporin-8 (AQP8) in placental vascular development in gestational diabetes mellitus (GDM), hematoxylin–eosin staining and immunohistochemistry were utilized to analyze the histopathological changes in placentas in GDM patients. Transwell, CCK-8, and tube formation assays were performed to examine cell migration, proliferation, and tube formation. AQP8, vascular cell adhesion molecule 1 (VCAM-1), tumor necrosis factor alpha (TNF)-α, and vascular endothelial growth factor (VEGF)-A expression levels were investigated. Relative to the control group, the placentas in the GDM group showed morphological changes, the number of microvessels in the placental villi arterioles was significantly higher, and the area of microvessels in the arterioles of placental villi was significantly lower. The expression levels of VCAM-1, TNF-α, VEGF-A, and AQP8 in the GDM placentas and human umbilical vein endothelial cells (HUVECs) stimulated by high glucose were significantly higher than those in the control group, and AQP8 was located in placental endothelial cells. Overexpression of glucose and AQP8 inhibited tube formation, migration, and proliferation in HUVECs. High glucose levels can induce dysfunction in vascular endothelial cells and lead to pathological changes in the placental vascular structure in GDM. AQP8 overexpression in placental GDM can inhibit endothelial cell behavior, cause endothelial cell dysfunction, and further participate in the occurrence and development of GDM placental vascular lesions.
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Affiliation(s)
- Yanxing Shan
- Department of Obstetrics and Gynecology, Affiliated Hospital 2 of Nantong University , No. 6 North Road, Haierxiang, Chongchuan District , Nantong , Jiangsu, 226001 , China
| | - Jiawen Cui
- Department of Obstetrics and Gynecology, Affiliated Hospital 2 of Nantong University , No. 6 North Road, Haierxiang, Chongchuan District , Nantong , Jiangsu, 226001 , China
- Department of Obstetrics and Gynecology, Qingpu Branch of Zhongshan Hospital Affiliated to Fudan University, Qingpu , Shanghai , 201700 , China
| | - Xinyi Kang
- Department of Obstetrics and Gynecology, Affiliated Hospital 2 of Nantong University , No. 6 North Road, Haierxiang, Chongchuan District , Nantong , Jiangsu, 226001 , China
| | - Weichun Tang
- Department of Obstetrics and Gynecology, Affiliated Hospital 2 of Nantong University , No. 6 North Road, Haierxiang, Chongchuan District , Nantong , Jiangsu, 226001 , China
| | - Yiling Lu
- Department of Obstetrics and Gynecology, Affiliated Hospital 2 of Nantong University , No. 6 North Road, Haierxiang, Chongchuan District , Nantong , Jiangsu, 226001 , China
| | - Ying Gao
- Department of Obstetrics and Gynecology, Affiliated Hospital 2 of Nantong University , No. 6 North Road, Haierxiang, Chongchuan District , Nantong , Jiangsu, 226001 , China
| | - Liping Chen
- Department of Obstetrics and Gynecology, Affiliated Hospital 2 of Nantong University , No. 6 North Road, Haierxiang, Chongchuan District , Nantong , Jiangsu, 226001 , China
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Keller AC, Chun JH, Knaub L, Henckel M, Hull S, Scalzo R, Pott G, Walker L, Reusch J. Thermoneutrality induces vascular dysfunction and impaired metabolic function in male Wistar rats: a new model of vascular disease. J Hypertens 2022; 40:2133-2146. [PMID: 35881464 PMCID: PMC9553250 DOI: 10.1097/hjh.0000000000003153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 03/03/2022] [Accepted: 03/04/2022] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Cardiovascular disease is of paramount importance, yet there are few relevant rat models to investigate its pathology and explore potential therapeutics. Housing at thermoneutral temperature (30 °C) is being employed to humanize metabolic derangements in rodents. We hypothesized that housing rats in thermoneutral conditions would potentiate a high-fat diet, resulting in diabetes and dysmetabolism, and deleteriously impact vascular function, in comparison to traditional room temperature housing (22 °C). METHODS Male Wistar rats were housed at either room temperature or thermoneutral temperatures for 16 weeks on either a low or high-fat diet. Glucose and insulin tolerance tests were conducted at the beginning and end of the study. At the study's conclusion, vasoreactivity and mitochondrial respiration of aorta and carotid were conducted. RESULTS We observed diminished vasodilation in vessels from thermoneutral rats ( P < 0.05), whereas high-fat diet had no effect. This effect was also observed in endothelium-denuded aorta in thermoneutral rats ( P < 0.05). Vasoconstriction was significantly elevated in aorta of thermoneutral rats ( P < 0.05). Diminished nitric oxide synthase activity and nitrotyrosine, and elevated glutathione activity were observed in aorta from rats housed under thermoneutral conditions, indicating a climate of lower nitric oxide and excess reactive oxygen species in aorta. Thermoneutral rat aorta also demonstrated less mitochondrial respiration with lipid substrates compared with the controls ( P < 0.05). CONCLUSION Our data support that thermoneutrality causes dysfunctional vasoreactivity, decreased lipid mitochondrial metabolism, and modified cellular signaling. These are critical observations as thermoneutrality is becoming prevalent for translational research models. This new model of vascular dysfunction may be useful for dissection of targetable aspects of cardiovascular disease and is a novel and necessary model of disease.
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Affiliation(s)
- Amy C. Keller
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus
- Rocky Mountain Regional VA Medical Center, Aurora, Colorado
| | | | - L.A. Knaub
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus
- Rocky Mountain Regional VA Medical Center, Aurora, Colorado
| | - M.M. Henckel
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus
- Rocky Mountain Regional VA Medical Center, Aurora, Colorado
| | - S.E. Hull
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus
- Rocky Mountain Regional VA Medical Center, Aurora, Colorado
| | - R.L. Scalzo
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus
- Rocky Mountain Regional VA Medical Center, Aurora, Colorado
| | - G.B. Pott
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus
- Rocky Mountain Regional VA Medical Center, Aurora, Colorado
| | - L.A. Walker
- Division of Cardiology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - J.E.B. Reusch
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus
- Rocky Mountain Regional VA Medical Center, Aurora, Colorado
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Chun JH, Henckel MM, Knaub LA, Hull SE, Pott GB, Ramirez DG, Reusch JEB, Keller AC. (-)-Epicatechin Reverses Glucose Intolerance in Rats Housed at Thermoneutrality. PLANTA MEDICA 2022; 88:735-744. [PMID: 35777366 PMCID: PMC9343939 DOI: 10.1055/a-1843-9855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 04/04/2022] [Indexed: 06/09/2023]
Abstract
Diabetes is a life-threatening and debilitating disease with pathological hallmarks, including glucose intolerance and insulin resistance. Plant compounds are a source of novel and effective therapeutics, and the flavonoid (-)-epicatechin, common to popular foods worldwide, has been shown to improve carbohydrate metabolism in both clinical studies and preclinical models. We hypothesized that (-)-epicatechin would alleviate thermoneutral housing-induced glucose intolerance. Male rats were housed at either thermoneutral (30 °C) or room temperature (24 °C) for 16 weeks and gavaged with either 1 mg/kg body weight or vehicle for the last 15 days before sacrifice. Rats housed at thermoneutrality had a significantly elevated serum glucose area under the curve (p < 0.05) and reduced glucose-mediated insulin secretion. In contrast, rats at thermoneutrality treated with (-)-epicatechin had improved glucose tolerance and increased insulin secretion (p < 0.05). Insulin tolerance tests revealed no differences in insulin sensitivity in any of the four groups. Pancreatic immunohistochemistry staining showed significantly greater islet insulin positive cells in animals housed at thermoneutrality. In conclusion, (-)-epicatechin improved carbohydrate tolerance via increased insulin secretion in response to glucose challenge without a change in insulin sensitivity.
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Affiliation(s)
- Ji Hye Chun
- Aquillius Corp., San Diego, CA, USA
- Rocky Mountain Regional VA Medical Center, Aurora, CO, USA
| | - Melissa M. Henckel
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Rocky Mountain Regional VA Medical Center, Aurora, CO, USA
| | - Leslie A. Knaub
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Rocky Mountain Regional VA Medical Center, Aurora, CO, USA
| | - Sara E. Hull
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Rocky Mountain Regional VA Medical Center, Aurora, CO, USA
| | - Greg B. Pott
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Rocky Mountain Regional VA Medical Center, Aurora, CO, USA
| | - David G. Ramirez
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Rocky Mountain Regional VA Medical Center, Aurora, CO, USA
| | - Jane E.-B. Reusch
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Rocky Mountain Regional VA Medical Center, Aurora, CO, USA
| | - Amy C. Keller
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Rocky Mountain Regional VA Medical Center, Aurora, CO, USA
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(-)-Epicatechin Reduces Neuroinflammation, Protects Mitochondria Function, and Prevents Cognitive Impairment in Sepsis-Associated Encephalopathy. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:2657713. [PMID: 35656027 PMCID: PMC9155907 DOI: 10.1155/2022/2657713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 05/09/2022] [Accepted: 05/10/2022] [Indexed: 11/17/2022]
Abstract
Sepsis-associated encephalopathy is a common neurological complication of sepsis. Despite advances in pathological and diagnostic investigations, its treatment remains a major challenge. In sepsis-associated encephalopathy, neuroinflammatory overactivation and mitochondrial damage are thought to contribute to cognitive and behavioral impairments. In this study, we found that administration of (−)-Epicatechin, a dietary flavonoid of the flavan-3-ol subgroup, improves memory deficits and behavior performance by ameliorating neuroinflammation, regulating mitochondria function, enhancing synaptic plasticity, and reducing neuronal loss in a mouse model of lipopolysaccharide-induced sepsis. We further show that the AMPK signaling pathway might be among the mechanisms involved in the beneficial memory effects. Our data demonstrated the potential of (−)-Epicatechin as a new drug candidate for the treatment of sepsis-associated cognitive impairment by targeting AMPK.
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Effect of Dietary Phenolic Compounds on Incidence of Cardiovascular Disease in the SUN Project; 10 Years of Follow-Up. Antioxidants (Basel) 2022; 11:antiox11040783. [PMID: 35453468 PMCID: PMC9027220 DOI: 10.3390/antiox11040783] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/12/2022] [Accepted: 04/13/2022] [Indexed: 02/04/2023] Open
Abstract
The health benefits of plant-based diets have been reported. Plant-based diets found in Spain and other Mediterranean countries differ from typical diets in other countries. In the Mediterranean diet, a high intake of phenolic compounds through olives, olive oil, and red wine may play an important role in cardiovascular prevention. Prospective studies carried out in Mediterranean countries may provide interesting insights. A relatively young Mediterranean cohort of 16,147 Spanish participants free of cardiovascular disease (CVD) was followed (61% women, mean (SD) age 37(12) years at baseline) for a median of 12.2 years. Dietary intake was repeatedly assessed using a 136-item validated food frequency questionnaire, and (poly)phenol intake was obtained using the Phenol-Explorer database. Participants were classified as incident cases of CVD if a medical diagnosis of myocardial infarction, stroke, or cardiovascular death was medically confirmed. Time-dependent Cox regression models were used to assess the relationship between (poly)phenol intake and the incidence of major CVD. A suboptimal intake of phenolic compounds was independently associated with a higher risk of CVD, multivariable-adjusted hazard ratio for the lowest versus top 4 quintiles: 1.85 (95% CI: 1.09–3.16). A moderate-to-high dietary intake of phenolic compounds, especially flavonoids, is likely to reduce CVD incidence in the context of a Mediterranean dietary pattern.
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(-)-Epicatechin Alters Reactive Oxygen and Nitrogen Species Production Independent of Mitochondrial Respiration in Human Vascular Endothelial Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:4413191. [PMID: 35069974 PMCID: PMC8767396 DOI: 10.1155/2022/4413191] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 11/24/2021] [Accepted: 11/30/2021] [Indexed: 11/17/2022]
Abstract
Introduction Vascular endothelial dysfunction is characterised by lowered nitric oxide (NO) bioavailability, which may be explained by increased production of reactive oxygen species (ROS), mitochondrial dysfunction, and altered cell signalling. (-)-Epicatechin (EPI) has proven effective in the context of vascular endothelial dysfunction, but the underlying mechanisms associated with EPI's effects remain unclear. Objective(s). Our aim was to investigate whether EPI impacts reactive oxygen and nitrogen species (RONS) production and mitochondrial function of human vascular endothelial cells (HUVECs). We hypothesised that EPI would attenuate ROS production, increase NO bioavailability, and enhance indices of mitochondrial function. Methods HUVECs were treated with EPI (0-20 μM) for up to 48 h. Mitochondrial and cellular ROS were measured in the absence and presence of antimycin A (AA), an inhibitor of the mitochondrial electron transport protein complex III, favouring ROS production. Genes associated with mitochondrial remodelling and the antioxidant response were quantified by RT-qPCR. Mitochondrial bioenergetics were assessed by respirometry and signalling responses determined by western blotting. Results Mitochondrial superoxide production without AA was increased 32% and decreased 53% after 5 and 10 μM EPI treatment vs. CTRL (P < 0.001). With AA, only 10 μM EPI increased mitochondrial superoxide production vs. CTRL (25%, P < 0.001). NO bioavailability was increased by 45% with 10 μM EPI vs. CTRL (P = 0.010). However, EPI did not impact mitochondrial respiration. NRF2 mRNA expression was increased 1.5- and 1.6-fold with 5 and 10 μM EPI over 48 h vs. CTRL (P = 0.015 and P = 0.001, respectively). Finally, EPI transiently enhanced ERK1/2 phosphorylation (2.9 and 3.2-fold over 15 min and 1 h vs. 0 h, respectively; P = 0.035 and P = 0.011). Conclusion(s). EPI dose-dependently alters RONS production of HUVECs but does not impact mitochondrial respiration. The induction of NRF2 mRNA expression with EPI might relate to enhanced ERK1/2 signalling, rather than RONS production. In humans, EPI may improve vascular endothelial dysfunction via alteration of RONS and activation of cell signalling.
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Chun JH, Henckel MM, Knaub LA, Hull SE, Pott GB, Walker LA, Reusch JEB, Keller AC. (-)-Epicatechin Improves Vasoreactivity and Mitochondrial Respiration in Thermoneutral-Housed Wistar Rat Vasculature. Nutrients 2022; 14:nu14051097. [PMID: 35268072 PMCID: PMC8912787 DOI: 10.3390/nu14051097] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 02/12/2022] [Accepted: 02/19/2022] [Indexed: 12/22/2022] Open
Abstract
Cardiovascular disease (CVD) is a global health concern. Vascular dysfunction is an aspect of CVD, and novel treatments targeting vascular physiology are necessary. In the endothelium, eNOS regulates vasodilation and mitochondrial function; both are disrupted in CVD. (−)-Epicatechin, a botanical compound known for its vasodilatory, eNOS, and mitochondrial-stimulating properties, is a potential therapy in those with CVD. We hypothesized that (−)-epicatechin would support eNOS activity and mitochondrial respiration, leading to improved vasoreactivity in a thermoneutral-derived rat model of vascular dysfunction. We housed Wistar rats at room temperature or in thermoneutral conditions for a total of 16 week and treated them with 1mg/kg body weight (−)-epicatechin for 15 day. Vasoreactivity, eNOS activity, and mitochondrial respiration were measured, in addition to the protein expression of upstream cellular signaling molecules including AMPK and CaMKII. We observed a significant improvement of vasodilation in those housed in thermoneutrality and treated with (−)-epicatechin (p < 0.05), as well as dampened mitochondrial respiration (p < 0.05). AMPK and CaMKIIα and β expression were lessened with (−)-epicatechin treatment in those housed at thermoneutrality (p < 0.05). The opposite was observed with animals housed at room temperature supplemented with (−)-epicatechin. These data illustrate a context-dependent vascular response to (−)-epicatechin, a candidate for CVD therapeutic development.
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Affiliation(s)
- Ji Hye Chun
- Microtek, Inc., San Diego, CA 92127, USA;
- Rocky Mountain Regional VA Medical Center, Aurora, CO 80045, USA; (M.M.H.); (L.A.K.); (S.E.H.); (G.B.P.); (J.E.-B.R.)
| | - Melissa M. Henckel
- Rocky Mountain Regional VA Medical Center, Aurora, CO 80045, USA; (M.M.H.); (L.A.K.); (S.E.H.); (G.B.P.); (J.E.-B.R.)
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Leslie A. Knaub
- Rocky Mountain Regional VA Medical Center, Aurora, CO 80045, USA; (M.M.H.); (L.A.K.); (S.E.H.); (G.B.P.); (J.E.-B.R.)
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Sara E. Hull
- Rocky Mountain Regional VA Medical Center, Aurora, CO 80045, USA; (M.M.H.); (L.A.K.); (S.E.H.); (G.B.P.); (J.E.-B.R.)
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Greg B. Pott
- Rocky Mountain Regional VA Medical Center, Aurora, CO 80045, USA; (M.M.H.); (L.A.K.); (S.E.H.); (G.B.P.); (J.E.-B.R.)
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Lori A. Walker
- Division of Cardiology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA;
| | - Jane E.-B. Reusch
- Rocky Mountain Regional VA Medical Center, Aurora, CO 80045, USA; (M.M.H.); (L.A.K.); (S.E.H.); (G.B.P.); (J.E.-B.R.)
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Amy C. Keller
- Rocky Mountain Regional VA Medical Center, Aurora, CO 80045, USA; (M.M.H.); (L.A.K.); (S.E.H.); (G.B.P.); (J.E.-B.R.)
- Division of Endocrinology, Metabolism & Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
- Correspondence: ; Tel.: +1-303-724-3921
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The Effect of Dietary Polyphenols on Vascular Health and Hypertension: Current Evidence and Mechanisms of Action. Nutrients 2022; 14:nu14030545. [PMID: 35276904 PMCID: PMC8840535 DOI: 10.3390/nu14030545] [Citation(s) in RCA: 53] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/20/2022] [Accepted: 01/23/2022] [Indexed: 02/08/2023] Open
Abstract
The aim of this review was to explore existing evidence from studies conducted on humans and summarize the mechanisms of action of dietary polyphenols on vascular health, blood pressure and hypertension. There is evidence that some polyphenol-rich foods, including berry fruits rich in anthocyanins, cocoa and green tea rich in flavan-3-ols, almonds and pistachios rich in hydroxycinnamic acids, and soy products rich in isoflavones, are able to improve blood pressure levels. A variety of mechanisms can elucidate the observed effects. Some limitations of the evidence, including variability of polyphenol content in plant-derived foods and human absorption, difficulty disentangling the effects of polyphenols from other dietary compounds, and discrepancy of doses between animal and human studies should be taken into account. While no single food counteracts hypertension, adopting a plant-based dietary pattern including a variety of polyphenol-rich foods is an advisable practice to improve blood pressure.
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( -)-Epicatechin and cardiometabolic risk factors: a focus on potential mechanisms of action. Pflugers Arch 2021; 474:99-115. [PMID: 34812946 DOI: 10.1007/s00424-021-02640-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 10/14/2021] [Accepted: 11/03/2021] [Indexed: 01/27/2023]
Abstract
This review summarizes experimental evidence on the beneficial effects of ( -)-epicatechin (EC) attenuating major cardiometabolic risk factors, i.e., dyslipidemias, obesity (adipose tissue dysfunction), hyperglycemia (insulin resistance), and hypertension (endothelial dysfunction). Studies in humans are revised and complemented with experiments in animal models, and cultured cells, aiming to understand the molecular mechanisms involved in EC-mediated effects. Firstly, an assessment of EC metabolism gives relevance to both conjugated-EC metabolites product of host metabolism and microbiota-derived species. Integration and analysis of results stress the maintenance of redox homeostasis and mitigation of inflammation as relevant processes associated with cardiometabolic diseases. In these processes, EC appears having significant effects regulating NADPH oxidase (NOX)-dependent oxidant production, nitric oxide (NO) production, and energy homeostasis (mitochondrial biogenesis and function). The potential participation of cell membranes and membrane-bound receptors is also discussed in terms of direct molecular action of EC and EC metabolites reaching cells and tissues.
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Ran D, Hong W, Yan W, Mengdie W. Properties and molecular mechanisms underlying geniposide-mediated therapeutic effects in chronic inflammatory diseases. JOURNAL OF ETHNOPHARMACOLOGY 2021; 273:113958. [PMID: 33639206 DOI: 10.1016/j.jep.2021.113958] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 01/25/2021] [Accepted: 02/16/2021] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Geniposide (GE) is ubiquitous in nearly 40 species of plants, among which Gardenia jasminoides J. Ellis has the highest content, and has been used ethnopharmacologically to treat chronic inflammatory diseases. As a traditional Chinese medicine, Gardenia jasminoides J. Ellis has a long history of usage in detumescence and sedation, liver protection and cholestasis, hypotension and hemostasis. It is commonly used in the treatment of diabetes, hypertension, jaundice hepatitis, sprain and contusion. As a type of iridoid glycosides extracted from Gardenia jasminoides J. Ellis, GE has many pharmacological effects, such as anti-inflammatory, anti-angiogenesic, anti-oxidative, etc. AIM OF THE REVIEW: In this article, we reviewed the sources, traditional usage, pharmacokinetics, toxicity and therapeutic effect of GE on chronic inflammatory diseases, and discussed its potential regulatory mechanisms and clinical application. RESULTS GE is a common iridoid glycoside in medicinal plants, which has strong activity in the treatment of chronic inflammatory diseases. A large number of in vivo and in vitro experiments confirmed that GE has certain therapeutic value for a variety of chronic inflammation disease. Its mechanism of function is mainly based on its anti-inflammatory, anti-oxidant, neuroprotective properties, as well as regulation of apoptotsis. GE plays a role in the treatment of chronic inflammatory diseases by regulating cell proliferation and apoptosis, realizing the dynamic balance of pro/anti-inflammatory factors, improving the state of oxidative stress, and restoring abnormally expressed inflammation-related pathways. CONCLUSION According to its extensive pharmacological effects, GE is a promising drug for the treatment of chronic inflammatory diseases.
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Affiliation(s)
- Deng Ran
- Key Laboratory of Xin'an Medicine, Ministry of Education, Hefei, 230012, China; College of Pharmacy, Anhui University of Chinese Medicine, Qian Jiang Road 1, Hefei, 230012, China; Anhui Province Key Laboratory of Chinese Medicinal Formula, Hefei, 230012, China; Anhui Province Key Laboratory of Research & Development of Chinese Medicine, Hefei, 230012, China
| | - Wu Hong
- Key Laboratory of Xin'an Medicine, Ministry of Education, Hefei, 230012, China; College of Pharmacy, Anhui University of Chinese Medicine, Qian Jiang Road 1, Hefei, 230012, China; Anhui Province Key Laboratory of Chinese Medicinal Formula, Hefei, 230012, China; Anhui Province Key Laboratory of Research & Development of Chinese Medicine, Hefei, 230012, China.
| | - Wang Yan
- Key Laboratory of Xin'an Medicine, Ministry of Education, Hefei, 230012, China; College of Pharmacy, Anhui University of Chinese Medicine, Qian Jiang Road 1, Hefei, 230012, China; Anhui Province Key Laboratory of Chinese Medicinal Formula, Hefei, 230012, China; Anhui Province Key Laboratory of Research & Development of Chinese Medicine, Hefei, 230012, China
| | - Wang Mengdie
- Key Laboratory of Xin'an Medicine, Ministry of Education, Hefei, 230012, China; College of Pharmacy, Anhui University of Chinese Medicine, Qian Jiang Road 1, Hefei, 230012, China; Anhui Province Key Laboratory of Chinese Medicinal Formula, Hefei, 230012, China; Anhui Province Key Laboratory of Research & Development of Chinese Medicine, Hefei, 230012, China
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Less Can Be More: The Hormesis Theory of Stress Adaptation in the Global Biosphere and Its Implications. Biomedicines 2021; 9:biomedicines9030293. [PMID: 33805626 PMCID: PMC8000639 DOI: 10.3390/biomedicines9030293] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 03/07/2021] [Accepted: 03/10/2021] [Indexed: 02/07/2023] Open
Abstract
A dose-response relationship to stressors, according to the hormesis theory, is characterized by low-dose stimulation and high-dose inhibition. It is non-linear with a low-dose optimum. Stress responses by cells lead to adapted vitality and fitness. Physical stress can be exerted through heat, radiation, or physical exercise. Chemical stressors include reactive species from oxygen (ROS), nitrogen (RNS), and carbon (RCS), carcinogens, elements, such as lithium (Li) and silicon (Si), and metals, such as silver (Ag), cadmium (Cd), and lead (Pb). Anthropogenic chemicals are agrochemicals (phytotoxins, herbicides), industrial chemicals, and pharmaceuticals. Biochemical stress can be exerted through toxins, medical drugs (e.g., cytostatics, psychopharmaceuticals, non-steroidal inhibitors of inflammation), and through fasting (dietary restriction). Key-lock interactions between enzymes and substrates, antigens and antibodies, antigen-presenting cells, and cognate T cells are the basics of biology, biochemistry, and immunology. Their rules do not obey linear dose-response relationships. The review provides examples of biologic stressors: oncolytic viruses (e.g., immuno-virotherapy of cancer) and hormones (e.g., melatonin, stress hormones). Molecular mechanisms of cellular stress adaptation involve the protein quality control system (PQS) and homeostasis of proteasome, endoplasmic reticulum, and mitochondria. Important components are transcription factors (e.g., Nrf2), micro-RNAs, heat shock proteins, ionic calcium, and enzymes (e.g., glutathion redox enzymes, DNA methyltransferases, and DNA repair enzymes). Cellular growth control, intercellular communication, and resistance to stress from microbial infections involve growth factors, cytokines, chemokines, interferons, and their respective receptors. The effects of hormesis during evolution are multifarious: cell protection and survival, evolutionary flexibility, and epigenetic memory. According to the hormesis theory, this is true for the entire biosphere, e.g., archaia, bacteria, fungi, plants, and the animal kingdoms.
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Oteiza PI, Fraga CG, Galleano M. Linking biomarkers of oxidative stress and disease with flavonoid consumption: From experimental models to humans. Redox Biol 2021; 42:101914. [PMID: 33750648 PMCID: PMC8113027 DOI: 10.1016/j.redox.2021.101914] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 02/09/2021] [Accepted: 02/18/2021] [Indexed: 02/07/2023] Open
Abstract
Identification of the links among flavonoid consumption, mitigation of oxidative stress and improvement of disease in humans has significantly advanced in the last decades. This review used (−)-epicatechin (EC) as an example of dietary flavonoids, and inflammation, endothelial dysfunction/hypertension and insulin resistance/diabetes as paradigms of human disease. In these pathologies, oxidative stress is part of their development and/or their perpetuation. Evidence from both, rodent studies and characterization of mechanisms in cell cultures are encouraging and mostly support indirect antioxidant actions of EC and EC metabolites in endothelial dysfunction and insulin resistance. Human studies also show beneficial effects of EC on these pathologies based on biomarkers of disease. However, there is limited available information on oxidative stress biomarkers and flavonoid consumption to allow establishing conclusive associations. The evolving discovery of metabolites that could serve as reliable markers of intake of specific flavonoids constitutes a powerful tool to link flavonoid consumption to disease and prevention of oxidative stress in human populations. Flavonoid’s metabolism and concentration determine their antioxidant mechanisms. Except for the GI tract, flavonoids are relevant indirect antioxidants in organs and tissues. Flavonoid's health effects are not always linked to biomarkers of oxidative stress. (‒)-Epicatechin mitigates the redox deregulation involved in hypertension/T2D pathogenesis. More human studies will strength links among flavonoids, oxidative stress, and disease.
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Affiliation(s)
- Patricia I Oteiza
- Department of Nutrition, University of California, Davis, USA; Department of Environmental Toxicology, University of California, Davis, USA.
| | - Cesar G Fraga
- Department of Nutrition, University of California, Davis, USA; Fisicoquímica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina; Instituto de Bioquímica y Medicina Molecular (IBIMOL), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina
| | - Monica Galleano
- Fisicoquímica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina; Instituto de Bioquímica y Medicina Molecular (IBIMOL), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina.
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Xiang H, Song R, Ouyang J, Zhu R, Shu Z, Liu Y, Wang X, Zhang D, Zhao J, Lu H. Organelle dynamics of endothelial mitochondria in diabetic angiopathy. Eur J Pharmacol 2021; 895:173865. [PMID: 33460616 DOI: 10.1016/j.ejphar.2021.173865] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 12/22/2020] [Accepted: 01/11/2021] [Indexed: 12/19/2022]
Abstract
Diabetes, a chronic non-communicable disease, has become one of the most serious and critical public health problems with increasing incidence trends. Chronic vascular complications are the major causes of disability and death in diabetic patients with endothelial dysfunction. Diabetes is intimately associated with endothelial mitochondrial dysfunction, indicated by increased oxidative stress, decreased biogenesis, increased DNA damage, and weakened autophagy in mitochondria. All these morphological and functional changes of mitochondria play important roles in diabetic endothelial dysfunction. Herein, we reviewed the roles and mechanisms of endothelial mitochondrial dysfunction, particularly mitochondrial dynamics in the vascular complications of diabetes and summarized the potential mitochondria-targeted therapies in diabetic vascular complications.
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Affiliation(s)
- Hong Xiang
- Center for Experimental Medical Research, the Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, China
| | - Ruipeng Song
- Department of Endocrinology, The Third People's Provincial Hospital of Henan Province, Zhengzhou, 450000, Henan, China
| | - Jie Ouyang
- Department of Cardiology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, China
| | - Ruifang Zhu
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Zhihao Shu
- Department of Cardiology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, China
| | - Yulan Liu
- Department of Cardiology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, China
| | - Xuewen Wang
- Department of Cardiology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, China
| | - Dongtao Zhang
- Department of Geriatrics, Tongxu Hospital of Traditional Chinese Medicine, Kaifeng, Henan, 475400, China
| | - Jiangwei Zhao
- Department of Internal Medicine 3, People's Hospital of Weihui, Xinxiang, Henan, 453100, China
| | - Hongwei Lu
- Center for Experimental Medical Research, the Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, China.
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