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Lv C, Cheng L, Feng W, Xie H, Kou J, Wang L, Shi M, Song X, Wang X, Chen S, Xue L, Zhang C, Li X, Zhao H. Targeting microbiota-immune-synaptic plasticity to explore the effect of tea polyphenols on improving memory in the aged type 2 diabetic rat model. Nutr Neurosci 2024:1-17. [PMID: 38622917 DOI: 10.1080/1028415x.2024.2341188] [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: 04/17/2024]
Abstract
OBJECTIVES The study aimed to explore whether TP could improve memory in the aged type 2 diabetic rat model by regulating microbiota-immune-synaptic plasticity axis. METHODS The experiment was divided into two parts. Firstly, to investigate the effects of TP on the physiopathology of the aged T2DM model rats, rats were randomly divided into the Normal control group, the aged group, the Aged T2DM model group, the TP 75, 150, 300 mg/kg groups, the 150 mg/kg Piracetam group and the 3 mg/kg Rosiglitazone group. Then, to further verify whether TP improved memory in aged T2DM rat model by regulating intestinal flora, the fecal microbiota transplantation (FMT) from the rats in the 300 mg/kg TP group into the rats in the aged T2DM model group was carried out. Effects on gut microbiota, colonic integrity (epithelial tight junction proteins), and endotoxemia (serum LPS) were examined, along with synaptic structure, synaptic plasticity-related structural proteins and inflammation signaling of the hippocampus in our study. RESULTS Our results demonstrated that TP alleviated memory impairments in the aged T2DM rat model. The specific outcomes were as follows: TP 300 mg/kg corrected the gut dysbacteriosis, alleviated intestinal permeability reduction and peripheral/central inflammation, inhibited the TLR4/NF-κB signaling pathway. Meanwhile, TP improved the synaptic plasticity in the hippocampus of the aged T2DM model rats, whose expressions of SYN, PSD 95, NMDAR1 and GluR1 in hippocampus were significantly up-regulated. Surprisingly, rats of the FMT group displayed the same changes. DISCUSSION TP improves the memory in aged T2DM rat model. The mechanism may be related to the alteration of gut flora, which can inhibit hippocampal TLR4/NF-κB signaling to attenuate neuroinflammation, then improve synaptic plasticity. The study proposes that TP interventions aimed at manipulating the gut microbiota may hold great potential as an effective approach for preventing and treating this disease.
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Affiliation(s)
- Chenhui Lv
- Department of Nutrition and Food Hygiene, Shanxi Medical University, Taiyuan, People's Republic of China
| | - Le Cheng
- Department of Nutrition and Food Hygiene, Shanxi Medical University, Taiyuan, People's Republic of China
| | - Wenjuan Feng
- Department of Nutrition and Food Hygiene, Shanxi Medical University, Taiyuan, People's Republic of China
| | - Haoran Xie
- Department of Nutrition and Food Hygiene, Shanxi Medical University, Taiyuan, People's Republic of China
| | - Jie Kou
- Department of Nutrition and Food Hygiene, Shanxi Medical University, Taiyuan, People's Republic of China
| | - Lili Wang
- Department of Nutrition and Food Hygiene, Shanxi Medical University, Taiyuan, People's Republic of China
| | - Mengqian Shi
- Department of Nutrition and Food Hygiene, Shanxi Medical University, Taiyuan, People's Republic of China
| | - Xin Song
- Department of Nutrition and Food Hygiene, Shanxi Medical University, Taiyuan, People's Republic of China
| | - Xi Wang
- Department of Nutrition and Food Hygiene, Shanxi Medical University, Taiyuan, People's Republic of China
| | - Shuangzhi Chen
- Department of Nutrition and Food Hygiene, Shanxi Medical University, Taiyuan, People's Republic of China
| | - Lushan Xue
- Department of Nutrition and Food Hygiene, Shanxi Medical University, Taiyuan, People's Republic of China
| | - Cheng Zhang
- Department of Nutrition and Food Hygiene, Shanxi Medical University, Taiyuan, People's Republic of China
| | - Xuemin Li
- Center for Disease Control and Prevention in Shanxi Province, Taiyuan, People's Republic of China
| | - Haifeng Zhao
- Department of Nutrition and Food Hygiene, Shanxi Medical University, Taiyuan, People's Republic of China
- Key Laboratory of Coal Environmental Pathogenicity and Prevention (Shanxi Medical University), Ministry of Education, Taiyuan, People's Republic of China
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Rubin MR, Dhaliwal R. Role of advanced glycation endproducts in bone fragility in type 1 diabetes. Bone 2024; 178:116928. [PMID: 37802378 DOI: 10.1016/j.bone.2023.116928] [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: 04/24/2023] [Revised: 09/28/2023] [Accepted: 10/03/2023] [Indexed: 10/10/2023]
Abstract
The excess fracture risk observed in adults with type 1 diabetes (T1D) is inexplicable in the presence of only modest reductions in areal bone mineral density (BMD). Accumulation of advanced glycation endproducts (AGEs) in bone has been invoked as one explanation for the increased bone fragility in diabetes. The evidence linking AGEs and fractures in individuals with T1D is sparse, although the association has been observed in individuals with type 2 diabetes. Recent data show that in T1D, AGEs as measured by skin intrinsic fluorescence, are a risk factor for lower BMD. Further research in T1D is needed to ascertain whether there is a causal relationship between fractures and AGEs. If confirmed, this would pave the way for finding interventions that can slow AGE accumulation and thus reduce fractures in T1D.
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Affiliation(s)
- Mishaela R Rubin
- Metabolic Bone Disease Unit, Vagelos College of Physicians & Surgeons, Columbia University Irving Medical Center, United States of America
| | - Ruban Dhaliwal
- Division of Endocrinology, Department of Internal Medicine, The University of Texas Southwestern Medical Center, United States of America.
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Wang Q, Li H, Zhang G, Chen X, Wang X. Itaconate prolongs the healthy lifespan by activating UPR mt in Caenorhabditis elegans. Eur J Pharmacol 2022; 923:174951. [PMID: 35405114 DOI: 10.1016/j.ejphar.2022.174951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/29/2022] [Accepted: 04/05/2022] [Indexed: 11/18/2022]
Abstract
Itaconate (ItA), a byproduct of the Krebs cycle, has recently emerged as an anti-inflammatory metabolite for inhibiting the overactive immune response. In addition to its immunomodulatory and antimicrobial effects, ItA may have other therapeutic avenues. Herein, the effect of ItA on aging was explored in order to better establish the therapeutic potential of this promising metabolite. ItA extended the lifespan and enhanced the stress resistance of Caenorhabditis elegans (C. elegans), even at the doses of 0.01 and 0.1 μM. Moreover, the lifespan extension effect of ItA was pronounced even for the aged worms (days 7 and 9 post adult stage). Furthermore, ItA was found to extend the healthy longevity of C. elegans in a mitochondria-dependent manner. ItA protected the mitochondrial integrity, increased ATP content, and decreased the reactive oxygen species (ROS) in C. elegans. Mechanistic investigations showed that ItA specifically activated the mitochondrial unfolded protein response (UPRmt) in worms and significantly increased the expression of activating transcription factor associated with stress-1 (ATFS-1) that senses mitochondrial stress and communicates with the nucleus during the UPRmt. ItA extended the lifespan of C. elegans in an ATFS-1-dependent manner. In summary, this study elucidates the molecular mechanism by which ItA extends the healthy lifespan and highlights the importance of mitochondrial integrity in the intervention of aging.
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Affiliation(s)
- Qingqing Wang
- School of Chemistry and Life Science, Changchun University of Technology, Changchun, Jilin, 130012, China
| | - Hongyuan Li
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China
| | - Gangwei Zhang
- School of Chemistry and Life Science, Changchun University of Technology, Changchun, Jilin, 130012, China
| | - Xiaoguang Chen
- School of Chemistry and Life Science, Changchun University of Technology, Changchun, Jilin, 130012, China; College of Humanities and information, Changchun University of Technology, Changchun, Jilin, 130122, China.
| | - Xiaohui Wang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China; Beijing National Laboratory for Molecular Sciences, Beijing, 100190, China.
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4
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Dhaliwal R, Ewing SK, Vashishth D, Semba RD, Schwartz AV. Greater Carboxy-Methyl-Lysine Is Associated With Increased Fracture Risk in Type 2 Diabetes. J Bone Miner Res 2022; 37:265-272. [PMID: 34820902 PMCID: PMC8828668 DOI: 10.1002/jbmr.4466] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 09/20/2021] [Accepted: 10/02/2021] [Indexed: 02/06/2023]
Abstract
Accumulation of advanced glycation end-products (AGE) in bone alters collagen structure and function. Fluorescent AGEs are associated with fractures but less is known regarding non-fluorescent AGEs. We examined associations of carboxy-methyl-lysine (CML), with incident clinical and prevalent vertebral fractures by type 2 diabetes (T2D) status, in the Health, Aging, and Body Composition cohort of older adults. Incident clinical fractures and baseline vertebral fractures were assessed. Cox regression was used to analyze the associations between serum CML and clinical fracture incidence, and logistic regression for vertebral fracture prevalence. At baseline, mean ± standard deviation (SD) age was 73.7 ± 2.8 and 73.6 ± 2.9 years in T2D (n = 712) and non-diabetes (n = 2332), respectively. Baseline CML levels were higher in T2D than non-diabetes (893 ± 332 versus 771 ± 270 ng/mL, p < 0.0001). In multivariate models, greater CML was associated with higher risk of incident clinical fracture in T2D (hazard ratio [HR] 1.49; 95% confidence interval [CI], 1.24-1.79 per 1-SD increase in log CML) but not in non-diabetes (HR 1.03; 95% CI, 0.94-1.13; p for interaction = 0.001). This association was independent of bone mineral density (BMD), glycated hemoglobin (hemoglobin A1c), weight, weight loss, smoking, cystatin-C, and medication use. CML was not significantly associated with the odds of prevalent vertebral fractures in either group. In conclusion, higher CML levels are associated with increased risk of incident clinical fractures in T2D, independent of BMD. These results implicate CML in the pathogenesis of bone fragility in diabetes. © 2021 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Ruban Dhaliwal
- Metabolic Bone Disease Center, State University of New York Upstate Medical University, New York, NY, USA
| | - Susan K. Ewing
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, USA
| | - Deepak Vashishth
- Department of Biomedical Engineering, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, New York, NY, USA
| | - Richard D. Semba
- Department of Ophthalmology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ann V. Schwartz
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, USA
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5
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Shah M, Appuswamy AV, Rao SD, Dhaliwal R. Treatment of bone fragility in patients with diabetes: antiresorptive versus anabolic? Curr Opin Endocrinol Diabetes Obes 2021; 28:377-382. [PMID: 34010225 PMCID: PMC8244995 DOI: 10.1097/med.0000000000000645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW The pathogenesis of bone fragility in diabetes has not been fully characterized. The antifracture efficacy of available therapies remains unproven in patients with diabetes. We aim to collate current evidence of the treatment of diabetic bone fragility, and to provide a rationale for considering optimal therapeutic option in patients with diabetes. RECENT FINDINGS The antifracture efficacy of antiresorptive and anabolic therapies is well established in patients without diabetes. Studies in patients with osteoporosis have shown that anabolic therapies lead to faster and larger benefits to bone mineral density and offer greater protection against fracture than antiresorptive therapies. Available data suggest that antiresorptive and anabolic therapies have similar effect on bone density and fracture risk reduction in patients with and without diabetes. However, the evidence in diabetes is limited to observational studies and post hoc analyses of osteoporosis studies. SUMMARY There are no specific guidelines for the treatment of bone fragility in patients with diabetes. We offer a rationale for use of anabolic therapies in diabetes which is a low bone formation state, in contrast to postmenopausal osteoporosis that is characterized by increased bone turnover. Prospective studies evaluating the effect of available therapies on bone quality and fracture outcomes in patients with diabetes are needed.
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Affiliation(s)
- Meghna Shah
- Metabolic Bone Disease Center, State University of New York Upstate Medical University, NY
| | | | - Sudhaker D. Rao
- Bone and Mineral Research Laboratory, Henry Ford Hospital, Detroit, MI
| | - Ruban Dhaliwal
- Metabolic Bone Disease Center, State University of New York Upstate Medical University, NY
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6
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Moseley KF, Du Z, Sacher SE, Ferguson VL, Donnelly E. Advanced glycation endproducts and bone quality: practical implications for people with type 2 diabetes. Curr Opin Endocrinol Diabetes Obes 2021; 28:360-370. [PMID: 34183538 DOI: 10.1097/med.0000000000000641] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
PURPOSE OF REVIEW Individuals with type 2 diabetes (T2D) are at increased risk of fracture, often despite normal bone density. This observation suggests deficits in bone quality in the setting of abnormal glucose homeostasis. The goal of this article is to review recent developments in our understanding of how advanced glycation end products (AGEs) are incorporated into the skeleton with resultant deleterious effects on bone health and structural integrity in patients with T2D. RECENT FINDINGS The adverse effects of skeletal AGE accumulation on bone remodeling and the ability of the bone to deform and absorb energy prior to fracture have been demonstrated both at the bench as well as in small human studies; however, questions remain as to how these findings might be better explored in large, population-based investigations. SUMMARY Hyperglycemia drives systemic, circulating AGE formation with subsequent accumulation in the bone tissue. In those with T2D, studies suggest that AGEs diminish fracture resistance, though larger clinical studies are needed to better define the direct role of longstanding AGE accumulation on bone strength in humans as well as to motivate potential interventions to reverse or disrupt skeletal AGE deposition with the goal of fracture prevention.
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Affiliation(s)
- Kendall F Moseley
- Department of Medicine, Division of Endocrinology, Diabetes & Metabolism, Johns Hopkins University, Baltimore, Maryland
| | - Zexu Du
- Department of Materials Science and Engineering, Cornell University, Ithaca
| | - Sara E Sacher
- Department of Materials Science and Engineering, Cornell University, Ithaca
| | - Virginia L Ferguson
- Department of Mechanical Engineering, UCB 427
- Biomedical Engineering Program, UCB 422, University of Colorado, Boulder, Colorado, USA
| | - Eve Donnelly
- Department of Materials Science and Engineering, Cornell University, Ithaca
- Research Division, Hospital for Special Surgery, New York, New York
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7
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Gasmi A, Chirumbolo S, Peana M, Mujawdiya PK, Dadar M, Menzel A, Bjørklund G. Biomarkers of Senescence during Aging as Possible Warnings to Use Preventive Measures. Curr Med Chem 2021; 28:1471-1488. [PMID: 32942969 DOI: 10.2174/0929867327999200917150652] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 08/09/2020] [Accepted: 08/18/2020] [Indexed: 11/22/2022]
Abstract
Human life expectancy is increasing significantly over time thanks to the improved possibility for people to take care of themselves and the higher availability of food, drugs, hygiene, services, and assistance. The increase in the average age of the population worldwide is, however, becoming a real concern, since aging is associated with the rapid increase in chronic inflammatory pathologies and degenerative diseases, very frequently dependent on senescent phenomena that occur alongside with senescence. Therefore, the search for reliable biomarkers that can diagnose the possible onset or predict the risk of developing a disease associated with aging is a crucial target of current medicine. In this review, we construct a synopsis of the main addressable biomarkers to study the development of aging and the associated ailments.
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Affiliation(s)
- Amin Gasmi
- Société Francophone de Nutrithérapie et de Nutrigénétique Appliquée, Villeurbanne, France
| | - Salvatore Chirumbolo
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Massimiliano Peana
- Department of Chemistry and Pharmacy, University of Sassari, Sassari, Italy
| | | | - Maryam Dadar
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
| | - Alain Menzel
- Laboratoires Réunis, Junglinster, Luxembourg, Norway
| | - Geir Bjørklund
- Council for Nutritional and Environmental Medicine (CONEM), Mo i Rana, Norway
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8
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Yu F, Jiang R, Han W, Zhan G, Xu X, Jiang X, Wang L, Xiang S, Zhou Q, Liu C, Zhu B, Hua F, Yang C. Gut microbiota transplantation from db/db mice induces diabetes-like phenotypes and alterations in Hippo signaling in pseudo germ-free mice. Aging (Albany NY) 2020; 12:24156-24167. [PMID: 33223509 PMCID: PMC7762484 DOI: 10.18632/aging.104101] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 09/04/2020] [Indexed: 12/17/2022]
Abstract
Type 2 diabetes mellitus (T2DM) is an age-related metabolic disease that is of increasing concern. Gut microbiota might have a critical role in the pathogenesis of T2DM. Additionally, Hippo signaling has been associated strongly with the progression of T2DM and the aging process. We adopted db/db male mice as a T2DM model, and the gut microbiota of db/db and m/m mice were transplanted successfully into pseudo germ-free mice. Furthermore, Hippo signaling, including mammalian sterile 20-like protein kinases 1 (MST1), large tumor suppressors 1 (LATS1), Yes-associated protein (YAP), and phosphorylation of YAP (p-YAP) in peripheral tissues were significantly altered and highly correlated with blood glucose in db/db mice. Interestingly, the host after gut microbiota transplantation from db/db mice showed decreased MST1 and LATS1 levels, and p-YAP/YAP ratio in the heart, liver, and kidney compared to those from m/m mice. Negative correlations between fasting blood glucose and Hippo signaling levels in selected peripheral tissues also were identified. These findings suggest that alterations in Hippo signaling in selected peripheral tissues may contribute to the development of T2DM, and that therapeutic interventions improving Hippo signaling by gut microbiota transplantation might be beneficial for the treatment of T2DM and other age-related metabolic diseases.
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Affiliation(s)
- Fan Yu
- Department of Endocrinology, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Riyue Jiang
- Department of Ultrasound Imaging, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Wei Han
- Department of Neurosurgery, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Gaofeng Zhan
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xiaolin Xu
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xiaohong Jiang
- Department of Endocrinology, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Long Wang
- Department of Endocrinology, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Shoukui Xiang
- Department of Endocrinology, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Qin Zhou
- Department of Ultrasound Imaging, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Cunming Liu
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Bin Zhu
- Department of Critical Care Medicine, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Fei Hua
- Department of Endocrinology, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Chun Yang
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
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Zhang L, Zhou W, Zhan L, Hou S, Zhao C, Bi T, Lu X. Fecal microbiota transplantation alters the susceptibility of obese rats to type 2 diabetes mellitus. Aging (Albany NY) 2020; 12:17480-17502. [PMID: 32920548 PMCID: PMC7521520 DOI: 10.18632/aging.103756] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 07/06/2020] [Indexed: 01/24/2023]
Abstract
Obesity is one of the susceptibility factors for type 2 diabetes (T2DM), both of which could accelerate the aging of the body and bring many hazards. A causal relationship is present between intestinal microbiota and body metabolism, but how the microbiota play a role in the progression of obesity to T2DM has not been elucidated. In this study, we transplanted healthy or obese-T2DM intestinal microbiota to ZDF and LZ rats, and used 16S rRNA and targeted metabonomics to evaluate the directional effect of the microbiota on the susceptibility of obese rats to T2DM. The glycolipid metabolism phenotype could be changed bidirectionally in obese rats instead of in lean ones. One possible mechanism is that the microbiota and metabolites alter the structure of the intestinal tract, and improve insulin and leptin resistance through JAK2 / IRS / Akt pathway. It is worth noting that 7 genera, such as Lactobacillus, Clostridium and Roche, can regulate 15 metabolites, such as 3-indolpropionic acid, acetic acid and docosahexaenoic acid, and have a significant improvement on glycolipid metabolism phenotype. Attention to intestinal homeostasis may be the key to controlling obesity and preventing T2DM.
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Affiliation(s)
- Lijing Zhang
- School of Traditional Chinese Medicine and School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Wen Zhou
- School of Traditional Chinese Medicine and School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Libin Zhan
- School of Traditional Chinese Medicine and School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Shenglin Hou
- School of Traditional Chinese Medicine and School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Chunyan Zhao
- School of Traditional Chinese Medicine and School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Tingting Bi
- School of Traditional Chinese Medicine and School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Xiaoguang Lu
- Department of Emergency Medicine, Zhongshan Hospital, Dalian University, Dalian 116001, China
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Eckhardt BA, Rowsey JL, Thicke BS, Fraser DG, O’Grady KL, Bondar OP, Hines JM, Singh RJ, Thoreson AR, Rakshit K, Lagnado AB, Passos JF, Vella A, Matveyenko AV, Khosla S, Monroe DG, Farr JN. Accelerated osteocyte senescence and skeletal fragility in mice with type 2 diabetes. JCI Insight 2020; 5:135236. [PMID: 32267250 PMCID: PMC7253018 DOI: 10.1172/jci.insight.135236] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 03/26/2020] [Indexed: 12/16/2022] Open
Abstract
The worldwide prevalence of type 2 diabetes (T2D) is increasing. Despite normal to higher bone density, patients with T2D paradoxically have elevated fracture risk resulting, in part, from poor bone quality. Advanced glycation endproducts (AGEs) and inflammation as a consequence of enhanced receptor for AGE (RAGE) signaling are hypothesized culprits, although the exact mechanisms underlying skeletal dysfunction in T2D are unclear. Lack of inducible models that permit environmental (in obesity) and temporal (after skeletal maturity) control of T2D onset has hampered progress. Here, we show in C57BL/6 mice that a onetime pharmacological intervention (streptozotocin, STZ) initiated in adulthood combined with high-fat diet-induced (HFD-induced) obesity caused hallmark features of human adult-onset T2D, including prolonged hyperglycemia, insulin resistance, and pancreatic β cell dysfunction, but not complete destruction. In addition, HFD/STZ (i.e., T2D) resulted in several changes in bone quality that closely mirror those observed in humans, including compromised bone microarchitecture, reduced biomechanical strength, impaired bone material properties, altered bone turnover, and elevated levels of the AGE CML in bone and blood. Furthermore, T2D led to the premature accumulation of senescent osteocytes with a unique proinflammatory signature. These findings highlight the RAGE pathway and senescent cells as potential targets to treat diabetic skeletal fragility.
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Affiliation(s)
| | | | | | - Daniel G. Fraser
- Division of Endocrinology
- Robert and Arlene Kogod Center on Aging
| | | | | | | | | | - Andrew R. Thoreson
- Materials and Structural Testing Core
- Department of Physical Medicine and Rehabilitation, and
| | - Kuntol Rakshit
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Anthony B. Lagnado
- Robert and Arlene Kogod Center on Aging
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - João F. Passos
- Robert and Arlene Kogod Center on Aging
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Aleksey V. Matveyenko
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Sundeep Khosla
- Division of Endocrinology
- Robert and Arlene Kogod Center on Aging
| | - David G. Monroe
- Division of Endocrinology
- Robert and Arlene Kogod Center on Aging
| | - Joshua N. Farr
- Division of Endocrinology
- Robert and Arlene Kogod Center on Aging
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
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11
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Dhaliwal R, Hans D, Hattersley G, Mitlak B, Fitzpatrick LA, Wang Y, Schwartz AV, Miller PD, Josse RG. Abaloparatide in Postmenopausal Women With Osteoporosis and Type 2 Diabetes: A Post Hoc Analysis of the ACTIVE Study. JBMR Plus 2020; 4:e10346. [PMID: 32258965 PMCID: PMC7117849 DOI: 10.1002/jbm4.10346] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 01/15/2020] [Accepted: 01/26/2020] [Indexed: 01/06/2023] Open
Abstract
Type 2 diabetes mellitus (T2DM) increases fracture risk despite normal or increased BMD. Abaloparatide reduces fracture risk in patients with postmenopausal osteoporosis (PMO); however, its efficacy in women with T2DM is unknown. This post hoc analysis evaluated the efficacy and safety of abaloparatide in patients with T2DM. The analysis included patients with T2DM from the Abaloparatide Comparator Trial In Vertebral Endpoints (ACTIVE), a phase 3, double‐blind, randomized, placebo‐ and active‐controlled trial. In ACTIVE, participants were randomized 1:1:1 to daily s.c. injections of placebo, abaloparatide (80 μg), or open‐label teriparatide (20 μg) for 18 months. A total of 198 women with PMO and T2DM from 21 centers in 10 countries were identified from ACTIVE through review of their medical records. The main outcomes measured included effect of abaloparatide versus placebo on BMD and trabecular bone score (TBS), with secondary outcomes of fracture risk and safety, in patients from ACTIVE with T2DM. Significant (p < 0.001) improvements in BMD at total hip (mean change 3.0% versus −0.4%), femoral neck (2.6% versus −0.2%), and lumbar spine (8.9% versus 1.3%) and TBS at lumbar spine (3.72% versus −0.56%) were observed with abaloparatide versus placebo at 18 months. Fracture events were fewer with abaloparatide treatment in patients with T2DM, and differences were not significant between groups except nonvertebral fractures in the abaloparatide versus placebo groups (p = 0.04). Safety was consistent with the ACTIVE population. In conclusion, in women with PMO and T2DM, abaloparatide treatment resulted in significant improvements in BMD and TBS versus placebo, consistent with the overall ACTIVE population © 2020 The Authors. JBMR Plus published by Wiley Periodicals, Inc. on behalf of American Society for Bone and Mineral Research.
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Affiliation(s)
- Ruban Dhaliwal
- Metabolic Bone Disease Center State University of New York Upstate Medical University Syracuse NY USA
| | - Didier Hans
- Center of Bone Disease, Bones & Joints Department Lausanne University Hospital Lausanne Switzerland
| | | | - Bruce Mitlak
- Clinical Development, Radius Health, Inc. Waltham MA USA
| | | | - Yamei Wang
- Biostatistics, Radius Health, Inc. Waltham MA USA
| | - Ann V Schwartz
- Department of Epidemiology and Biostatistics UCSF School of Medicine San Francisco CA USA
| | - Paul D Miller
- Research, Colorado Center for Bone Research Lakewood CO USA
| | - Robert G Josse
- Research, St. Michael's Hospital University of Toronto Toronto Canada
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Abnormal gut microbiota composition contributes to the development of type 2 diabetes mellitus in db/db mice. Aging (Albany NY) 2019; 11:10454-10467. [PMID: 31760385 PMCID: PMC6914402 DOI: 10.18632/aging.102469] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 11/08/2019] [Indexed: 02/07/2023]
Abstract
It is well recognized that type 2 diabetes mellitus (T2DM) is an age-related metabolic disease, emerging gradually as a major global health burden that has gained public attention. Meanwhile, increasing attention is paid to the crucial role of gut microbiota in the pathogenesis and therapeutic mechanisms of metabolic disorders, especially T2DM. In this study, we used C57 BL/KS db/db male mice as a T2DM murine model. We found that the β-diversity and relative abundances of gut bacteria were obviously altered in db/db mice, associated with a significant increase in Verrucomicrobia at six levels (phylum, class, order, etc.) and family S24-7 and a significant decrease in Bacteroidaceae at family, genus, and species levels, as well as Prevotellaceae at family and genus levels. Furthermore, fecal bacteria from db/db and m/m mice transplanted into pseudo-germ-free mice showed a significant change in the metabolic parameters, including the body weight, fasting blood glucose, fluid and food intake, and alterations in the composition of the gut microbiota. Taken together, these findings suggest that abnormalities in the composition of the gut microbiota might contribute to the development of T2DM and that potential therapeutic strategies improving gut microbiota might provide beneficial effects for individuals with T2DM and age-related glucose intolerance.
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The Impact of Type II Diabetes on Tongue Dysplasia and p16-Related Aging Process: An Experimental Study. Anal Cell Pathol (Amst) 2019; 2019:3563215. [PMID: 31687322 PMCID: PMC6800967 DOI: 10.1155/2019/3563215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 08/25/2019] [Accepted: 09/09/2019] [Indexed: 11/24/2022] Open
Abstract
Objective To evaluate the effect of streptozotocin-induced experimental diabetes mellitus on p16, p53, Ki67, and Bcl2 expressions and histopathological changes in the tongue of the rats. Material and Methods Twenty-two adult female Sprague-Dawley rats were used. The rats were randomly divided into 2 groups (n = 14) as control (C) (n = 8) and diabetic (DM) (n = 6). The rats in the DM group were given streptozotocin as a single intraperitoneal dose for induction of diabetes. Histopathological and immunohistochemical evaluations of formalin-fixed and paraffin-embedded tissue sections of the tongue were used. Results Significant differences were observed between the DM group and the control group in terms of epithelial thickness, length of filiform papillae, and width of filiform papillae (p = 0.005, p = 0.001, and p = 0.006, respectively). There was no significant difference between the groups in terms of mononuclear inflammatory cell infiltration, capillary proliferation, and dysplasia (p = 0.204, p = 0.244, and p = 0.204, respectively). As a result of immunohistochemical studies, no significant difference was found between the groups in terms of p53, Ki67, and Bcl-2 expressions (p = 0.588, p = 0.662, and p = 0.686, respectively). A significant difference was found between the groups when p16 expression was evaluated (p = 0.006). Conclusions In our study, streptozotocin-induced experimental diabetes mellitus induced p16 expression but did not show any difference in p53, Bcl-2, and Ki67 levels. It should be considered in the studies that the pathological changes at the early stages of the relationship between DM and oral cancer may be related to p16 expression; however, it may also be linked with p16-related aging process.
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Cai H, Li G, Jiang S, Yin H, Liu P, Chen L. Effect of Low-Intensity, Kinect™-Based Kaimai-Style Qigong Exercise in Older Adults With Type 2 Diabetes. J Gerontol Nurs 2019; 45:42-52. [DOI: 10.3928/00989134-20190111-05] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Accepted: 11/26/2018] [Indexed: 11/20/2022]
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Abstract
BACKGROUND Paradoxically, elderly persons with type 2 diabetes mellitus (T2DM) fracture despite having higher bone density than nondiabetics. Systemic factors associated with aging and T2DM may have detrimental, local effects on the skeleton. One such factor could be by altering the microenvironment of the mesenchymal stem cells (MSCs), multipotent progenitors capable of differentiating into adipocytes or osteoblasts. METHODS Sera were obtained from four participant groups (n = 40 total, 10 per group): (1) young women with normal glucose tolerance (NGTY), (2) postmenopausal women with NGT), (3) postmenopausal women with impaired glucose tolerance (IGT), and (4) postmenopausal women with T2DM. Sera were incubated with human MSCs for 14 days. Cell proliferation and apoptosis were measured using EdU and TUNEL labeling assays, respectively. MSC differentiation for each group was determined using osteogenic and adipogenic gene expression markers quantified by qRT-PCR, as well as Alizarin Red and Oil Red O staining. RESULTS Expression of adipogenic genes was greater than twofold higher (P < 0.05) in MSCs cultured with T2DM sera compared to those incubated with NGTY, NGT, or IGT sera. The increase in adipogenic gene expression corresponded with increased Oil Red O staining. Despite the increased adipogenic differentiation of MSCs exposed to T2DM sera, cell proliferation and apoptosis rates as well as osteoblastic activity were not significantly different among the four conditions. CONCLUSIONS Systemic, circulating factors in the serum of older women with T2DM may promote MSC differentiation into adipocytes versus osteoblasts. Increased differentiation of MSCs into adipocytes is one possible mechanism by which T2DM increases fracture risk.
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Affiliation(s)
- Kendall F. Moseley
- Division of Endocrinology, Diabetes and Metabolism, Johns Hopkins University School of Medicine, 5200 Eastern Avenue, MFL Center Tower, Suite 4300, Baltimore, MD 21224
| | - Máire E. Doyle
- Diabetes Section, LCI, NIA/NIH; 251 Bayview Boulevard, BRC, Baltimore, MD 21224
| | - Suzanne M. Jan de Beur
- Division of Endocrinology, Diabetes and Metabolism, Johns Hopkins University School of Medicine, 5200 Eastern Avenue, MFL Center Tower, Suite 4300, Baltimore, MD 21224
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Devlin M, Robbins A, Cosman M, Moursi C, Cloutier A, Louis L, Van Vliet M, Conlon C, Bouxsein M. Differential effects of high fat diet and diet-induced obesity on skeletal acquisition in female C57BL/6J vs. FVB/NJ Mice. Bone Rep 2018; 8:204-214. [PMID: 29955639 PMCID: PMC6020275 DOI: 10.1016/j.bonr.2018.04.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 03/06/2018] [Accepted: 04/16/2018] [Indexed: 12/28/2022] Open
Abstract
The effects of obesity on bone metabolism are complex, and may be mediated by consumption of a high fat diet and/or by obesity-induced metabolic dysregulation. To test the hypothesis that both high fat (HF) diet and diet-induced metabolic disease independently decrease skeletal acquisition, we compared effects of HF diet on bone mass and microarchitecture in two mouse strains: diet-induced obesity (DIO)-susceptible C57BL/6J (B6) and DIO-resistant FVB/NJ (FVB). At 3 wks of age we weaned 120 female FVB and B6 mice onto normal (N, 10% Kcal/fat) or HF diet (45% Kcal/fat) and euthanized them at 6, 12 and 20 weeks of age (N = 10/grp). Outcomes included body mass; percent fat and whole-body bone mineral density (WBBMD, g/cm2) via DXA; cortical and trabecular bone architecture at the midshaft and distal femur via μCT; and marrow adiposity via histomorphometry. In FVB HF, body mass, percent body fat, WBBMD and marrow adiposity did not differ vs. N, but trabecular bone mass was lower at 6 wks of age only (p < 0.05), cortical bone geometric properties were lower at 12 wks only, and bone strength was lower at 20 wks of age only in HF vs. N (p < 0.05). In contrast, B6 HF had higher body mass, percent body fat, and leptin vs. N. B6 HF also had higher WBBMD (p < 0.05) at 9 and 12 wks of age but lower distal femur trabecular bone mass at 12 wks of age, and lower body mass-adjusted cortical bone properties at 20 wks of age compared to N (p < 0.05). Marrow adiposity was also markedly higher in B6 HF vs. N. Overall, HF diet negatively affected bone mass in both strains, but was more deleterious to trabecular bone microarchitecture and marrow adiposity in B6 than in FVB mice. These data suggest that in addition to fat consumption itself, the metabolic response to high fat diet independently alters skeletal acquisition in obesity.
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Affiliation(s)
- M.J. Devlin
- Department of Anthropology, University of Michigan, Ann Arbor, MI 48104, United States
| | - A. Robbins
- Department of Anthropology, University of Michigan, Ann Arbor, MI 48104, United States
| | - M.N. Cosman
- Department of Anthropology, University of Michigan, Ann Arbor, MI 48104, United States
| | - C.A. Moursi
- Department of Anthropology, University of Michigan, Ann Arbor, MI 48104, United States
| | - A.M. Cloutier
- Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center, United States
| | - L. Louis
- Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center, United States
| | - M. Van Vliet
- Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center, United States
| | - C. Conlon
- Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center, United States
| | - M.L. Bouxsein
- Harvard Medical School, Boston, MA 02215, United States
- Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center, United States
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Fat, Sugar, and Bone Health: A Complex Relationship. Nutrients 2017; 9:nu9050506. [PMID: 28513571 PMCID: PMC5452236 DOI: 10.3390/nu9050506] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 04/26/2017] [Accepted: 05/12/2017] [Indexed: 02/05/2023] Open
Abstract
With people aging, osteoporosis is expected to increase notably. Nutritional status is a relatively easily-modified risk factor, associated with many chronic diseases, and is involved in obesity, diabetes, and coronary heart disease (CHD), along with osteoporosis. Nutrients, such as fats, sugars, and proteins, play a primary function in bone metabolism and maintaining bone health. In Western nations, diets are generally high in saturated fats, however, currently, the nutritional patterns dominating in China continue to be high in carbohydrates from starch, cereals, and sugars. Moreover, high fat or high sugar (fructose, glucose, or sucrose) impart a significant impact on bone structural integrity. Due to diet being modifiable, demonstrating the effects of nutrition on bone health can provide an approach for osteoporosis prevention. Most researchers have reported that a high-fat diet consumption is associated with bone mineral density (BMD) and, as bone strength diminishes, adverse microstructure changes occur in the cancellous bone compartment, which is involved with lipid metabolism modulation disorder and the alteration of the bone marrow environment, along with an increased inflammatory environment. Some studies, however, demonstrated that a high-fat diet contributes to achieving peak bone mass, along with microstructure, at a younger age. Contrary to these results, others have shown that a high-fructose diet consumption leads to stronger bones with a superior microarchitecture than those with the intake of a high-glucose diet and, at the same time, research indicated that a high-fat diet usually deteriorates cancellous bone parameters, and that the incorporation of fructose into a high-fat diet did not aggravate bone mass loss. High-fat/high-sucrose diets have shown both beneficial and detrimental influences on bone metabolism. Combined, these studies showed that nutrition exerts different effects on bone health. Thus, a better understanding of the regulation between dietary nutrition and bone health might provide a basis for the development of strategies to improve bone health by modifying nutritional components.
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