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Elmi M, Dass JH, Dass CR. The Various Roles of PEDF in Cancer. Cancers (Basel) 2024; 16:510. [PMID: 38339261 PMCID: PMC10854708 DOI: 10.3390/cancers16030510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/16/2024] [Accepted: 01/23/2024] [Indexed: 02/12/2024] Open
Abstract
Pigment epithelium-derived factor (PEDF) is a natural immunomodulator, anti-inflammatory, anti-angiogenic, anti-tumour growth and anti-metastasis factor, which can enhance tumour response to PEDF but can also conversely have pro-cancerous effects. Inflammation is a major cause of cancer, and it has been proven that PEDF has anti-inflammatory properties. PEDF's functional activity can be investigated through measuring metastatic and metabolic biomarkers that will be discussed in this review.
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Affiliation(s)
- Mitra Elmi
- Curtin Medical School, Curtin University, Bentley, WA 6102, Australia; (M.E.); (J.H.D.)
- Curtin Health Innovation Research Institute, Curtin Medical School, Curtin University, Bentley, WA 6102, Australia
| | - Joshua H. Dass
- Curtin Medical School, Curtin University, Bentley, WA 6102, Australia; (M.E.); (J.H.D.)
- Sir Charles Gairdner Hospital, Nedlands, WA 6009, Australia
| | - Crispin R. Dass
- Curtin Medical School, Curtin University, Bentley, WA 6102, Australia; (M.E.); (J.H.D.)
- Curtin Health Innovation Research Institute, Curtin Medical School, Curtin University, Bentley, WA 6102, Australia
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Yang B, Lu L, Zhou D, Fan W, Barbier-Torres L, Steggerda J, Yang H, Yang X. Regulatory network and interplay of hepatokines, stellakines, myokines and adipokines in nonalcoholic fatty liver diseases and nonalcoholic steatohepatitis. Front Endocrinol (Lausanne) 2022; 13:1007944. [PMID: 36267567 PMCID: PMC9578007 DOI: 10.3389/fendo.2022.1007944] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 09/05/2022] [Indexed: 11/29/2022] Open
Abstract
Fatty liver disease is a spectrum of liver pathologies ranging from simple hepatic steatosis to non-alcoholic fatty liver disease (NAFLD), non-alcoholic steatohepatitis (NASH), and culminating with the development of cirrhosis or hepatocellular carcinoma (HCC). The pathogenesis of NAFLD is complex and diverse, and there is a lack of effective treatment measures. In this review, we address hepatokines identified in the pathogenesis of NAFLD and NASH, including the signaling of FXR/RXR, PPARα/RXRα, adipogenesis, hepatic stellate cell activation/liver fibrosis, AMPK/NF-κB, and type 2 diabetes. We also highlight the interaction between hepatokines, and cytokines or peptides secreted from muscle (myokines), adipose tissue (adipokines), and hepatic stellate cells (stellakines) in response to certain nutritional and physical activity. Cytokines exert autocrine, paracrine, or endocrine effects on the pathogenesis of NAFLD and NASH. Characterizing signaling pathways and crosstalk amongst muscle, adipose tissue, hepatic stellate cells and other liver cells will enhance our understanding of interorgan communication and potentially serve to accelerate the development of treatments for NAFLD and NASH.
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Affiliation(s)
- Bing Yang
- Department of Geriatric Endocrinology and Metabolism, Guangxi Key Laboratory of Precision Medicine in Cardio-cerebrovascular Diseases Control and Prevention, Guangxi Clinical Research Center for Cardio-cerebrovascular Diseases, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Liqing Lu
- Department of Thoracic Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Dongmei Zhou
- Department of Geriatric Endocrinology and Metabolism, Guangxi Key Laboratory of Precision Medicine in Cardio-cerebrovascular Diseases Control and Prevention, Guangxi Clinical Research Center for Cardio-cerebrovascular Diseases, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Wei Fan
- Division of Digestive and Liver Diseases, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Lucía Barbier-Torres
- Division of Digestive and Liver Diseases, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Justin Steggerda
- Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Heping Yang
- Division of Digestive and Liver Diseases, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Xi Yang
- Department of Geriatric Endocrinology and Metabolism, Guangxi Key Laboratory of Precision Medicine in Cardio-cerebrovascular Diseases Control and Prevention, Guangxi Clinical Research Center for Cardio-cerebrovascular Diseases, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
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Chen CC, Lee TY, Leu YL, Wang SH. Pigment epithelium-derived factor inhibits adipogenesis in 3T3-L1 adipocytes and protects against high-fat diet-induced obesity and metabolic disorders in mice. Transl Res 2019; 210:26-42. [PMID: 31121128 DOI: 10.1016/j.trsl.2019.04.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 03/23/2019] [Accepted: 04/12/2019] [Indexed: 01/10/2023]
Abstract
Obesity is a major cause of metabolic syndrome and type II diabetes, and it presents with metabolic disorders, such as hyperglycemia, hyperlipidemia, and insulin resistance. Pigment epithelium-derived factor (PEDF), a protein isolated from retinal pigment epithelial cells, has multiple functions, including neuronal protection, antineoplastic effects, and anti-inflammatory activity. The aim of this study is to investigate the antiobesity effects of PEDF. The antiobesity effects of PEDF on fat accumulation, inflammation, energy expenditure, insulin resistance, and obesity-related physiological parameters and protein levels were assessed in high-fat diet (HFD)-induced obese mice in vivo and in 3T3-L1 adipocytes, palmitate (PA)-treated HepG2 cells, and C2C12 myotubes in vitro. In an in vivo assay, PEDF effectively decreased body weight gain, white adipose tissue mass, and inflammation and improved insulin resistance, dyslipidemia, and hyperglycemia in HFD-induced mice. In liver tissue, PEDF decreased lipid accumulation and fibrosis. In an in vitro assay, PEDF diminished the differentiation of 3T3-L1 preadipocytes. We also determined that PEDF promoted lipolysis and prolonged cell cycle progression, through the mTOR-S6K pathway and downstream transcription factors, such as peroxisome proliferator-activated receptor gamma, CCAAT/enhancer-binding protein α (CEBP-α), and CEBP-β. In addition, PEDF decreased reactive oxygen species production in PA-induced HepG2 cells and improved glucose uptake ability in PA-induced HepG2 cells and C2C12 myotubes. In the present study, PEDF protected against HFD-induced obesity and metabolic disorders in mice, inhibited adipogenesis, and improved insulin resistance. These results provide a new potential treatment for obesity in the future.
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Affiliation(s)
- Chin-Chuan Chen
- Graduate Institute of Natural Products, Chang Gung University, Taoyuan, Taiwan; Tissue Bank, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Ting-Yau Lee
- Department of Anatomy and Cell Biology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yann-Lii Leu
- Graduate Institute of Natural Products, Chang Gung University, Taoyuan, Taiwan; Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University, Taoyuan, Taiwan; Center for Traditional Chinese Medicine, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shu-Huei Wang
- Department of Anatomy and Cell Biology, College of Medicine, National Taiwan University, Taipei, Taiwan.
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Reinehr T. Inflammatory markers in children and adolescents with type 2 diabetes mellitus. Clin Chim Acta 2019; 496:100-107. [PMID: 31276632 DOI: 10.1016/j.cca.2019.07.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 06/24/2019] [Accepted: 07/01/2019] [Indexed: 02/07/2023]
Abstract
This review examines the potential relationship between serum inflammation markers and type 2 diabetes mellitus (T2DM). Inflammation markers have been proposed as prognostic markers for the development of T2DM and its complications. Furthermore, modulation of the inflammatory process may offer future treatment strategies for T2DM. This review focuses on children and adolescents because there is usually little, if any, complications associated with other disease processes, use of medications, or active tobacco smoking. Furthermore, β-cell failure in young age cannot be solely explained by aging and exhaustion of β-cells due to insulin resistance. Pediatric studies have demonstrated that pro-inflammatory cytokines TNF-α, IL-6, IL-1β, IFNγ, PEDF, and fetuin A were increased in insulin resistance, while the anti-inflammatory cytokines adiponectin and omentin were decreased. Furthermore, TNF-α, fetuin A, FGF-21 were altered in obese children with T2DM suggesting a direct involvement in β-cell failure. Future studies focusing on children and adolescents may facilitate our understanding of T2DM as an inflammatory disease process.
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Affiliation(s)
- Thomas Reinehr
- Department of Pediatric Endocrinology, Diabetes and Nutrition Medicine, Vestische Hospital for Children and Adolescents Datteln, University of Witten/Herdecke, Dr. F. Steiner Str. 5, D-45711 Datteln, Germany.
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Zhang W, Cui X, Gao Y, Sun L, Wang J, Yang Y, Liu X, Li Y, Guo X, Sun D. Role of pigment epithelium-derived factor (PEDF) on arsenic-induced neuronal apoptosis. CHEMOSPHERE 2019; 215:925-931. [PMID: 30408888 DOI: 10.1016/j.chemosphere.2018.10.100] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 10/12/2018] [Accepted: 10/16/2018] [Indexed: 06/08/2023]
Abstract
Chronic exposure to high levels of arsenic is closely associated with nervous system disorders that harm learning, memory, and intelligence. Studies have shown that the primary characteristic of brain damage is neuronal apoptosis. Arsenic induces apoptosis in a variety of nerve cells. Therefore, substance that inhibit apoptosis promise to mitigate arsenic toxicity. Pigment epithelium-derived factor (PEDF) is widely distributed in brain tissues and has various effects on neurons, including induction of apoptosis. Our previous study suggested that PEDF might augment arsenic-induced apoptosis in rat brains. In this study of 151 adults with normal, mild, moderate, and high exposure to arsenic, the measured serum PEDF levels were 15.46 ± 5.87 ng/mL, 17.33 ± 8.22 ng/mL, 19.43 ± 9.51 ng/mL and 21.65 ± 14.46 ng/mL, respectively. Multiple linear regression analysis revealed an independent positive correlation between serum PEDF levels and arsenic exposure in drinking water. To study the underlying mechanism of arsenic-induced apoptosis, we exposed PEDF-transfected PC12 cells to NaAsO2. We discovered that NaAsO2--induced mitochondrial apoptosis was enhanced in cells that over expressed PEDF. Moreover, p53 up regulated modulator of apoptosis (PUMA) gene and B-cell lymphoma 2 (Bcl-2) protein were primary factors in the progression of arsenic-induced apoptosis. Taken together, our results suggest that PEDF inhibition might mitigate arsenic toxicity to nerve cells.
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Affiliation(s)
- Wei Zhang
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, China; Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Harbin 150081, China
| | - Xiaohui Cui
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, China; Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Harbin 150081, China
| | - Yanhui Gao
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, China; Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Harbin 150081, China
| | - Liyan Sun
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, China; Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Harbin 150081, China
| | - Jing Wang
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, China; Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Harbin 150081, China
| | - Yanmei Yang
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, China; Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Harbin 150081, China
| | - Xiaona Liu
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, China; Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Harbin 150081, China
| | - Yuanyuan Li
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, China; Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Harbin 150081, China
| | - Xiangnan Guo
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, China; Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Harbin 150081, China
| | - Dianjun Sun
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, China; Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Harbin 150081, China.
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Abstract
PURPOSE OF REVIEW Chronic inflammation, adipokines, and hepatokines have been identified as basis of insulin resistance and β cell failure in animal models. We present our current knowledge concerning the potential relationship between these cytokines, inflammation, metabolic syndrome (MetS), and type 2 diabetes mellitus (T2DM) in the pediatric population. RECENT FINDINGS Pro-inflammatory cytokines related to insulin resistance and MetS in children are tumor necrosis factor-alpha (TNF-α), interleukin (IL)-6, IL-1β, interferon gamma, pigment epithelium-derived factor, chemerin, vaspin, and fetuin A. Anti-inflammatory cytokines associated with insulin resistance and MetS in children are leptin, adiponectin, omentin, fibroblast growth factor (FGF)-21, osteocalcin, and irisin. These anti-inflammatory cytokines are decreased (adiponectin, omentin, and osteocalcin) or increased (leptin, FGF-21, and irisin) in obesity suggesting a resistance state. TNF-α, fetuin A, and FGF-21 are altered in obese children with T2DM suggesting an involvement in β cell failure. These cytokines, adipokines, and hepatokines may be able to predict development of MetS and T2DM and have a potential therapeutic target ameliorating insulin resistance.
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Affiliation(s)
- Thomas Reinehr
- Department of Pediatric Endocrinology, Diabetes and Nutrition Medicine, Vestische Hospital for Children and Adolescents Datteln, University of Witten/Herdecke, Dr. F. Steiner Str. 5, D-45711, Datteln, Germany.
| | - Christian Ludwig Roth
- Center for Integrative Brain Research, Seattle Children's Research Institute, 1900 Ninth Avenue, Seattle, WA, 98101, USA
- Division of Endocrinology, Department of Pediatrics, University of Washington, Seattle, WA, 98105, USA
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Sylvetsky AC, Issa NT, Chandran A, Brown RJ, Alamri HJ, Aitcheson G, Walter M, Rother KI. Pigment Epithelium-Derived Factor Declines in Response to an Oral Glucose Load and Is Correlated with Vitamin D and BMI but Not Diabetes Status in Children and Young Adults. Horm Res Paediatr 2017; 87:301-306. [PMID: 28399539 PMCID: PMC5495608 DOI: 10.1159/000466692] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 02/27/2017] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Pigment epithelium-derived factor (PEDF) is associated with obesity and diabetes complications in adults, yet little is known about PEDF in younger individuals. We investigated the relationship between PEDF and various metabolic biomarkers in young healthy volunteers (HV) and similar-aged patients with diabetes (type 1 and type 2). METHODS A fasting blood sample was collected in 48 HV, 11 patients with type 1 diabetes (T1D), and 11 patients with type 2 diabetes (T2D) 12-25 years of age. In 9 healthy subjects, PEDF was also serially measured during a frequently sampled oral glucose tolerance test (OGTT). RESULTS PEDF was positively correlated with BMI and systolic blood pressure and negatively correlated with vitamin D. Upon multivariable analysis, BMI and vitamin D were independent predictors of PEDF. Prior to adjustment, PEDF was highest in T2D patients (7,168.9 ± 4417.4 ng/mL) and lowest in individuals with T1D (2,967.7 ± 947.1 ng/mL) but did not differ by diagnosis when adjusted for BMI and vitamin D. Among volunteers who underwent an OGTT, PEDF declined by ∼20% in response to an oral glucose load. CONCLUSION PEDF was acutely regulated by a glucose load and was correlated with BMI but not with diabetes. The negative correlation with vitamin D, independent of BMI, raises the question whether PEDF plays a compensatory role in bone matrix mineralization.
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Affiliation(s)
- Allison C. Sylvetsky
- Section on Pediatric Diabetes and Metabolism, NIDDK, NIH,Department of Exercise and Nutrition Sciences, Milken Institute School of Public Health, The George Washington University,Sumner M. Redstone Global Center for Prevention and Wellness, Milken Institute School of Public Health, The George Washington University
| | - Najy T. Issa
- Department of Exercise and Nutrition Sciences, Milken Institute School of Public Health, The George Washington University
| | - Avinash Chandran
- Department of Exercise and Nutrition Sciences, Milken Institute School of Public Health, The George Washington University
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Hudson LK, Dancho ME, Li J, Bruchfeld JB, Ragab AA, He MM, Bragg M, Lenaghan D, Quinn MD, Fritz JR, Tanzi MV, Silverman HA, Hanes WM, Levine YA, Pavlov VA, Olofsson PS, Roth J, Al-Abed Y, Andersson U, Tracey KJ, Chavan SS. Emetine Di-HCl Attenuates Type 1 Diabetes Mellitus in Mice. Mol Med 2016; 22:585-596. [PMID: 27341452 DOI: 10.2119/molmed.2016.00082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Accepted: 05/26/2016] [Indexed: 01/06/2023] Open
Abstract
Type 1 diabetes mellitus (T1D) is a chronic autoimmune disease characterized by beta cell destruction, insulin deficiency and hyperglycemia. Activated macrophages and autoimmune T cells play a crucial role in the pathogenesis of hyperglycemia in NOD murine diabetes models, but the molecular mechanisms of macrophage activation are unknown. We recently identified pigment epithelium-derived factor (PEDF) as an adipocyte-derived factor that activates macrophages and mediates insulin resistance. Reasoning that PEDF might participate as a proinflammatory mediator in murine diabetes, we measured PEDF levels in NOD mice. PEDF levels are significantly elevated in pancreas, in correlation with pancreatic TNF levels in NOD mice. To identify experimental therapeutics, we screened 2,327 compounds in two chemical libraries (the NIH Clinical Collection and Pharmakon-1600a) for leads that inhibit PEDF mediated TNF release in macrophage cultures. The lead molecule selected, "emetine" is a widely used emetic. It inhibited PEDF-mediated macrophage activation with an EC50 or 146 nM. Administration of emetine to NOD mice and to C57Bl6 mice subjected to streptozotocin significantly attenuated hyperglycemia, reduced TNF levels in pancreas, and attenuated insulitis. Together, these results suggest that targeting PEDF with emetine may attenuate TNF release and hyperglycemia in murine diabetes models. This suggests that further investigation of PEDF and emetine in the pathogenesis of human diabetes is warranted.
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Affiliation(s)
- LaQueta K Hudson
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America.,Hofstra North Shore-LIJ School of Medicine, Hempstead, New York, United States of America
| | - Meghan E Dancho
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Jianhua Li
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Johanna B Bruchfeld
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Ahmed A Ragab
- Center for Molecular Innovation, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Mingzhu M He
- Center for Molecular Innovation, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Meaghan Bragg
- Center for Comparative Physiology, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Delaney Lenaghan
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Michael D Quinn
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Jason R Fritz
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Matthew V Tanzi
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Harold A Silverman
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - William M Hanes
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Yaakov A Levine
- Department of Advanced Research, SetPoint Medical Corporation, Valencia, California, United States of America
| | - Valentin A Pavlov
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Peder S Olofsson
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Jesse Roth
- Laboratory for Diabetes and Diabetes-Related Research, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Yousef Al-Abed
- Center for Molecular Innovation, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
| | - Ulf Andersson
- Deptartment of Women's and Children's Health, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Kevin J Tracey
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America.,Hofstra North Shore-LIJ School of Medicine, Hempstead, New York, United States of America
| | - Sangeeta S Chavan
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Manhasset, New York, United States of America
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Ikwuobe J, Bellary S, Griffiths HR. Innovative biomarkers for predicting type 2 diabetes mellitus: relevance to dietary management of frailty in older adults. Biogerontology 2016; 17:511-27. [PMID: 26897532 DOI: 10.1007/s10522-016-9634-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Accepted: 01/18/2016] [Indexed: 01/01/2023]
Abstract
Type 2 diabetes mellitus (T2DM) increases in prevalence in the elderly. There is evidence for significant muscle loss and accelerated cognitive impairment in older adults with T2DM; these comorbidities are critical features of frailty. In the early stages of T2DM, insulin sensitivity can be improved by a "healthy" diet. Management of insulin resistance by diet in people over 65 years of age should be carefully re-evaluated because of the risk for falling due to hypoglycaemia. To date, an optimal dietary programme for older adults with insulin resistance and T2DM has not been described. The use of biomarkers to identify those at risk for T2DM will enable clinicians to offer early dietary advice that will delay onset of disease and of frailty. Here we have used an in silico literature search for putative novel biomarkers of T2DM risk and frailty. We suggest that plasma bilirubin, plasma, urinary DPP4-positive microparticles and plasma pigment epithelium-derived factor merit further investigation as predictive biomarkers for T2DM and frailty risk in older adults. Bilirubin is screened routinely in clinical practice. Measurement of specific microparticle frequency in urine is less invasive than a blood sample so is a good choice for biomonitoring. Future studies should investigate whether early dietary changes, such as increased intake of whey protein and micronutrients that improve muscle function and insulin sensitivity, affect biomarkers and can reduce the longer term complication of frailty in people at risk for T2DM.
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Affiliation(s)
- John Ikwuobe
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Birmingham, B4 7ET, UK
| | - Srikanth Bellary
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Birmingham, B4 7ET, UK
| | - Helen R Griffiths
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Birmingham, B4 7ET, UK.
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Abstract
The prevalence of diabetes mellitus and obesity continues to increase globally. Diabetic vascular complications are the main chronic diabetic complications and associated with mortality and disability. Angiogenesis is a key pathological characteristic of diabetic microvascular complications. However, there are two tissue-specific paradoxical changes in the angiogenesis in diabetic microvascular complications: an excessive uncontrolled formation of premature blood vessels in some tissues, such as the retina, and a deficiency in the formation of small blood vessels in peripheral tissues, such as the skin. This review will discuss the paradoxical phenomena of angiogenesis and its underlying mechanism in obesity, diabetes and diabetic complications.
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Affiliation(s)
| | - Jian-xing Ma
- Department of Physiology, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
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