1
|
Šetinc M, Celinšćak Ž, Bočkor L, Zajc Petranović M, Stojanović Marković A, Peričić Salihović M, Deelen J, Škarić-Jurić T. The role of longevity-related genetic variant interactions as predictors of survival after 85 years of age. Mech Ageing Dev 2024; 219:111926. [PMID: 38484896 DOI: 10.1016/j.mad.2024.111926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 02/27/2024] [Accepted: 03/11/2024] [Indexed: 03/26/2024]
Abstract
Genome-wide association studies and candidate gene studies have identified several genetic variants that might play a role in achieving longevity. This study investigates interactions between pairs of those single nucleotide polymorphisms (SNPs) and their effect on survival above the age of 85 in a sample of 327 Croatian individuals. Although none of the SNPs individually showed a significant effect on survival in this sample, 14 of the 359 interactions tested (between SNPs not in LD) reached the level of nominal significance (p<0.05), showing a potential effect on late-life survival. Notably, SH2B3 rs3184504 interacted with different SNPs near TERC, TP53 rs1042522 with different SNPs located near the CDKN2B gene, and CDKN2B rs1333049 with different SNPs in FOXO3, as well as with LINC02227 rs2149954. The other interaction pairs with a possible effect on survival were FOXO3 rs2802292 and ERCC2 rs50871, IL6 rs1800795 and GHRHR rs2267723, LINC02227 rs2149954 and PARK7 rs225119, as well as PARK7 rs225119 and PTPN1 rs6067484. These interactions remained significant when tested together with a set of health-related variables that also had a significant effect on survival above 85 years. In conclusion, our results confirm the central role of genetic regulation of insulin signalling and cell cycle control in longevity.
Collapse
Affiliation(s)
- Maja Šetinc
- Institute for Anthropological Research, Zagreb 10000, Croatia; Centre for Applied Bioanthropology, Institute for Anthropological Research, Zagreb 10000, Croatia.
| | | | - Luka Bočkor
- Institute for Anthropological Research, Zagreb 10000, Croatia; Centre for Applied Bioanthropology, Institute for Anthropological Research, Zagreb 10000, Croatia
| | | | | | | | - Joris Deelen
- Max Planck Institute for Biology of Ageing, Cologne 50931, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Ageing-Associated Diseases (CECAD), University of Cologne, Cologne 50931, Germany.
| | | |
Collapse
|
2
|
Yang W, Kim DM, Jiang W, Ai W, Pan Q, Rahman S, Cai JJ, Brashear WA, Sun Y, Guo S. Suppression of FOXO1 attenuates inflamm-aging and improves liver function during aging. Aging Cell 2023; 22:e13968. [PMID: 37602516 PMCID: PMC10577549 DOI: 10.1111/acel.13968] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 08/04/2023] [Indexed: 08/22/2023] Open
Abstract
The liver is a key metabolic organ that maintains whole-body nutrient homeostasis. Aging-induced liver function alterations contribute to systemic susceptibility to aging-related diseases. However, the molecular mechanisms of liver aging remain insufficiently understood. In this study, we performed bulk RNA-Seq and single-cell RNA-Seq analyses to investigate the underlying mechanisms of the aging-induced liver function changes. We found that liver inflammation, glucose intolerance, and liver fat deposition were aggravated in old mice. Aging significantly increased pro-inflammation in hepatic macrophages. Furthermore, we found that Kupffer cells (KCs) were the major driver to induce pro-inflammation in hepatic macrophages during aging. In KCs, aging significantly increased pro-inflammatory levels; in monocyte-derived macrophages (MDMs), aging had a limited effect on pro-inflammation but led to a functional quiescence in antigen presentation and phagosome process. In addition, we identified an aging-responsive KC-specific (ARKC) gene set that potentially mediates aging-induced pro-inflammation in KCs. Interestingly, FOXO1 activity was significantly increased in the liver of old mice. FOXO1 inhibition by AS1842856 significantly alleviated glucose intolerance, hepatic steatosis, and systemic inflammation in old mice. FOXO1 inhibition significantly attenuated aging-induced pro-inflammation in KCs partially through downregulation of ARKC genes. However, FOXO1 inhibition had a limited effect on aging-induced functional quiescence in MDMs. These results indicate that aging induces pro-inflammation in liver mainly through targeting KCs and FOXO1 is a key player in aging-induced pro-inflammation in KCs. Thus, FOXO1 could be a potential therapeutic target for the treatment of age-associated chronic diseases.
Collapse
Affiliation(s)
- Wanbao Yang
- Department of Nutrition, College of Agriculture and Life SciencesTexas A&M UniversityCollege StationTexasUSA
| | - Da Mi Kim
- Department of Nutrition, College of Agriculture and Life SciencesTexas A&M UniversityCollege StationTexasUSA
| | - Wen Jiang
- Department of Nutrition, College of Agriculture and Life SciencesTexas A&M UniversityCollege StationTexasUSA
| | - Weiqi Ai
- Department of Nutrition, College of Agriculture and Life SciencesTexas A&M UniversityCollege StationTexasUSA
| | - Quan Pan
- Department of Nutrition, College of Agriculture and Life SciencesTexas A&M UniversityCollege StationTexasUSA
| | - Shahina Rahman
- Department of StatisticsTexas A&M UniversityCollege StationTexasUSA
| | - James J. Cai
- Department of Veterinary Integrative BiosciencesTexas A&M UniversityCollege StationTexasUSA
| | - Wesley A. Brashear
- High Performance Research ComputingTexas A&M UniversityCollege StationTexasUSA
| | - Yuxiang Sun
- Department of Nutrition, College of Agriculture and Life SciencesTexas A&M UniversityCollege StationTexasUSA
| | - Shaodong Guo
- Department of Nutrition, College of Agriculture and Life SciencesTexas A&M UniversityCollege StationTexasUSA
| |
Collapse
|
3
|
Hershberger CE, Raj R, Mariam A, Aykun N, Allende DS, Brown M, Aucejo F, Rotroff DM. Characterization of Salivary and Plasma Metabolites as Biomarkers for HCC: A Pilot Study. Cancers (Basel) 2023; 15:4527. [PMID: 37760495 PMCID: PMC10527521 DOI: 10.3390/cancers15184527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/24/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023] Open
Abstract
(1) Background: The incidence of hepatocellular carcinoma (HCC) is rising, and current screening methods lack sensitivity. This study aimed to identify distinct and overlapping metabolites in saliva and plasma that are significantly associated with HCC. (2) Methods: Saliva samples were collected from 42 individuals (HCC = 16, cirrhosis = 12, healthy = 14), with plasma samples from 22 (HCC = 14, cirrhosis = 2, healthy = 6). We performed untargeted mass spectrometry on blood and plasma, tested metabolites for associations with HCC or cirrhosis using a logistic regression, and identified enriched pathways with Metaboanalyst. Pearson's correlation was employed to test for correlations between salivary and plasma metabolites. (3) Results: Six salivary metabolites (1-hexadecanol, isooctanol, malonic acid, N-acetyl-valine, octadecanol, and succinic acid) and ten plasma metabolites (glycine, 3-(4-hydroxyphenyl)propionic acid, aconitic acid, isocitric acid, tagatose, cellobiose, fucose, glyceric acid, isocitric acid, isothreonic acid, and phenylacetic acid) were associated with HCC. Malonic acid was correlated between the paired saliva and plasma samples. Pathway analysis highlighted deregulation of the 'The Citric Acid Cycle' in both biospecimens. (4) Conclusions: Our study suggests that salivary and plasma metabolites may serve as independent sources for HCC detection. Despite the lack of correlation between individual metabolites, they converge on 'The Citric Acid Cycle' pathway, implicated in HCC pathogenesis.
Collapse
Affiliation(s)
- Courtney E Hershberger
- Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
- Center for Quantitative Metabolic Research, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Roma Raj
- Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
- Center for Quantitative Metabolic Research, Cleveland Clinic, Cleveland, OH 44195, USA
- Digestive Disease and Surgery Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Arshiya Mariam
- Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
- Center for Quantitative Metabolic Research, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Nihal Aykun
- Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
- Center for Quantitative Metabolic Research, Cleveland Clinic, Cleveland, OH 44195, USA
- Digestive Disease and Surgery Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Daniela S Allende
- Digestive Disease and Surgery Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Mark Brown
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
- Center for Microbiome and Human Health, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Federico Aucejo
- Digestive Disease and Surgery Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Daniel M Rotroff
- Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
- Center for Quantitative Metabolic Research, Cleveland Clinic, Cleveland, OH 44195, USA
- Endocrinology and Metabolism Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| |
Collapse
|
4
|
Zheng XQ, Lin JL, Huang J, Wu T, Song CL. Targeting aging with the healthy skeletal system: The endocrine role of bone. Rev Endocr Metab Disord 2023; 24:695-711. [PMID: 37402956 DOI: 10.1007/s11154-023-09812-6] [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] [Accepted: 05/29/2023] [Indexed: 07/06/2023]
Abstract
Aging is an inevitable biological process, and longevity may be related to bone health. Maintaining strong bone health can extend one's lifespan, but the exact mechanism is unclear. Bone and extraosseous organs, including the heart and brain, have complex and precise communication mechanisms. In addition to its load bearing capacity, the skeletal system secretes cytokines, which play a role in bone regulation of extraosseous organs. FGF23, OCN, and LCN2 are three representative bone-derived cytokines involved in energy metabolism, endocrine homeostasis and systemic chronic inflammation levels. Today, advanced research methods provide new understandings of bone as a crucial endocrine organ. For example, gene editing technology enables bone-specific conditional gene knockout models, which allows the study of bone-derived cytokines to be more precise. We systematically evaluated the various effects of bone-derived cytokines on extraosseous organs and their possible antiaging mechanism. Targeting aging with the current knowledge of the healthy skeletal system is a potential therapeutic strategy. Therefore, we present a comprehensive review that summarizes the current knowledge and provides insights for futures studies.
Collapse
Affiliation(s)
- Xuan-Qi Zheng
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
| | - Jia-Liang Lin
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
| | - Jie Huang
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
| | - Tong Wu
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
| | - Chun-Li Song
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China.
- Beijing Key Laboratory of Spinal Disease Research, Beijing, China.
- Engineering Research Center of Bone and Joint Precision Medicine, Beijing, China.
| |
Collapse
|
5
|
Liu Z, Mi J, Wu H. Relationships between circulating metabolites and facial skin aging: a Mendelian randomization study. Hum Genomics 2023; 17:23. [PMID: 36927485 PMCID: PMC10022075 DOI: 10.1186/s40246-023-00470-y] [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: 11/07/2022] [Accepted: 03/08/2023] [Indexed: 03/18/2023] Open
Abstract
BACKGROUND Blood metabolites are important to various aspects of our health. However, currently, there is little evidence about the role of circulating metabolites in the process of skin aging. OBJECTIVES To examine the potential effects of circulating metabolites on the process of skin aging. METHOD In the primary analyses, we applied several MR methods to study the associations between 249 metabolites and facial skin aging risk. In the secondary analyses, we replicated the analyses with another array of datasets including 123 metabolites. MR Bayesian model averaging (MR-BMA) method was further used to prioritize the metabolites for the identification of predominant metabolites that are associated with skin aging. RESULTS In the primary analyses, only the unsaturation degree of fatty acids was found significantly associated with skin aging with the IVW method after multiple testing (odds ratio = 1.084, 95% confidence interval = 1.049-1.120, p = 1.737 × 10-06). Additionally, 11 out of 17 unsaturation-related biomarkers showed a significant or suggestively significant causal effect [p < 0.05 and > 2 × 10-4 (0.05/249 metabolites)]. In the secondary analyses, seven metabolic biomarkers were found significantly associated with skin aging [p < 4 × 10-4 (0.05/123)], while six of them were related to the unsaturation degree. MR-BMA method validated that the unsaturation degree of fatty acids plays a dominant role in facial skin aging. CONCLUSIONS Our study used systemic MR analyses and provided a comprehensive atlas for the associations between circulating metabolites and the risk of facial skin aging. Genetically proxied unsaturation degree of fatty acids was highlighted as a dominant factor correlated with the risk of facial skin aging.
Collapse
Affiliation(s)
- Zhengye Liu
- Department of Plastic and Aesthetic Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Jiarui Mi
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Huiling Wu
- Department of Plastic and Aesthetic Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.
| |
Collapse
|
6
|
Ginsenoside Rg1 Delays Chronological Aging in a Yeast Model via CDC19- and SDH2-Mediated Cellular Metabolism. Antioxidants (Basel) 2023; 12:antiox12020296. [PMID: 36829855 PMCID: PMC9952469 DOI: 10.3390/antiox12020296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/19/2023] [Accepted: 01/24/2023] [Indexed: 01/31/2023] Open
Abstract
Ginsenosides, active substances in Panax ginseng C. A. Meyer (ginseng), extend lifespan in multiple species, ameliorate age-associated damage, and limit functional decline in multiple tissues. However, their active components and their molecular mechanisms are largely unknown. Here, ginsenoside Rg1 (Rg1) promoted longevity in Saccharomyces cerevisiae. Treatment with Rg1 decreased aging-mediated surface wrinkling, enhanced stress resistance, decreased reactive oxygen species' production and apoptosis, improved antioxidant enzyme activity, and decreased the aging rate. Proteomic analysis indicated that Rg1 delays S. cerevisiae senescence by regulating metabolic homeostasis. Protein-protein interaction networks based on differential protein expression indicated that CDC19, a homologue of pyruvate kinase, and SDH2, the succinate dehydrogenase iron-sulfur protein subunit, might be the effector proteins involved in the regulation by Rg1. Further experiments confirmed that Rg1 improved specific parameters of mitochondrial bioenergetics and core enzymes in the glycolytic pathway. Mutant strains were constructed that demonstrated the relationships between metabolic homeostasis and the predicted target proteins of Rg1. Rg1 could be used in new treatments for slowing the aging process. Our results also provide a useful dataset for further investigations of the mechanisms of ginseng in aging.
Collapse
|
7
|
Effects of lifelong spontaneous exercise on skeletal muscle and angiogenesis in super-aged mice. PLoS One 2022; 17:e0263457. [PMID: 35976884 PMCID: PMC9384990 DOI: 10.1371/journal.pone.0263457] [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: 11/02/2021] [Accepted: 06/02/2022] [Indexed: 11/19/2022] Open
Abstract
There has been an increasing awareness of sarcopenia, which is characterized by a concomitant decrease in skeletal muscle mass and quality due to aging. Resistance exercise is considered more effective than aerobic exercise in terms of therapeutic exercise. To confirm the effect of long-term aerobic exercise in preventing sarcopenia, we evaluated the skeletal muscle mass, quality, and angiogenic capacity of super-aged mice that had undergone lifelong spontaneous exercise (LSE) through various experiments. Our findings show that LSE could maintain skeletal muscle mass, quality, and fitness levels in super-aged mice. In addition, ex vivo experiments showed that the angiogenic capacity was maintained at a high level. However, these results were not consistent with the related changes in the expression of genes and/or proteins involved in protein synthesis or angiogenesis. Based on the results of previous studies, it seems certain that the expression at the molecular level does not represent the phenotypes of skeletal muscle and angiogenesis. This is because aging and long-term exercise are variables that can affect both protein synthesis and the expression patterns of angiogenesis-related genes and proteins. Therefore, in aging and exercise-related research, various physical fitness and angiogenesis variables and phenotypes should be analyzed. In conclusion, LSE appears to maintain the potential of angiogenesis and slow the aging process to maintain skeletal muscle mass and quality. Aerobic exercise may thus be effective for the prevention of sarcopenia.
Collapse
|
8
|
Barge S, Deka B, Kashyap B, Bharadwaj S, Kandimalla R, Ghosh A, Dutta PP, Samanta SK, Manna P, Borah JC, Talukdar NC. Astragalin mediates the pharmacological effects of Lysimachia candida Lindl on adipogenesis via downregulating PPARG and FKBP51 signaling cascade. Phytother Res 2021; 35:6990-7003. [PMID: 34734439 DOI: 10.1002/ptr.7320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 07/29/2021] [Accepted: 10/13/2021] [Indexed: 12/25/2022]
Abstract
Metabolic disturbances in different tissue cells and obesity are caused by excessive calorie intake, and medicinal plants are potential sources of phytochemicals for combating these health problems. This study investigated the role of methanolic extract of the folklore medicinal plant Lysimachia candida (LCM) and its phytochemical, astragalin, in managing obesity in vivo and in vitro. Administration of LCM (200 mg/kg/body weight) daily for 140 days significantly decreased both the body weight gain (15.66%) and blood triglyceride and free fatty acid levels in high-fat-diet-fed male Wistar rats but caused no substantial change in leptin and adiponectin levels. The protein expression of adipogenic transcription factors in visceral adipose tissue was significantly reduced. Further, the 3T3-L1 cell-based assay revealed that the butanol fraction of LCM and its isolated compound, astragalin, exhibited antiadipogenic activity through downregulating adipogenic transcription factors and regulatory proteins. Molecular docking studies were performed to depict the possible binding patterns of astragalin to adipogenesis proteins. Overall, we show the potential antiobesity effects of L. candida and its bioactive compound, astragalin, and suggest clinical studies with LCM and astragalin.
Collapse
Affiliation(s)
- Sagar Barge
- Biochemistry and Drug Discovery Lab, Institute of Advanced Study in Science and Technology, Guwahati, India
- Department of Molecular Biology and Biotechnology, Cotton University, Guwahati, India
| | - Barsha Deka
- Biochemistry and Drug Discovery Lab, Institute of Advanced Study in Science and Technology, Guwahati, India
- Department of Molecular Biology and Biotechnology, Cotton University, Guwahati, India
| | - Bhaswati Kashyap
- Biochemistry and Drug Discovery Lab, Institute of Advanced Study in Science and Technology, Guwahati, India
- Department of Molecular Biology and Biotechnology, Cotton University, Guwahati, India
| | - Simanta Bharadwaj
- Biochemistry and Drug Discovery Lab, Institute of Advanced Study in Science and Technology, Guwahati, India
- Department of Molecular Biology and Biotechnology, Cotton University, Guwahati, India
| | - Raghuram Kandimalla
- Biochemistry and Drug Discovery Lab, Institute of Advanced Study in Science and Technology, Guwahati, India
- Brown Cancer Center, University of Louisville, Louisville, Kentucky, USA
| | - Aparajita Ghosh
- Biochemistry and Drug Discovery Lab, Institute of Advanced Study in Science and Technology, Guwahati, India
| | - Partha Pratim Dutta
- Biochemistry and Drug Discovery Lab, Institute of Advanced Study in Science and Technology, Guwahati, India
- Faculty of Pharmaceutical science, Assam Down Town University, Guwahati, India
| | - Suman Kumar Samanta
- Biochemistry and Drug Discovery Lab, Institute of Advanced Study in Science and Technology, Guwahati, India
| | - Prasenjit Manna
- Biochemistry and Drug Discovery Lab, Institute of Advanced Study in Science and Technology, Guwahati, India
- Biological Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, India
| | - Jagat C Borah
- Biochemistry and Drug Discovery Lab, Institute of Advanced Study in Science and Technology, Guwahati, India
| | - Narayan Chandra Talukdar
- Biochemistry and Drug Discovery Lab, Institute of Advanced Study in Science and Technology, Guwahati, India
- Faculty of Pharmaceutical science, Assam Down Town University, Guwahati, India
| |
Collapse
|
9
|
Palliyaguru DL, Shiroma EJ, Nam JK, Duregon E, Vieira Ligo Teixeira C, Price NL, Bernier M, Camandola S, Vaughan KL, Colman RJ, Deighan A, Korstanje R, Peters LL, Dickinson SL, Ejima K, Simonsick EM, Launer LJ, Chia CW, Egan J, Allison DB, Churchill GA, Anderson RM, Ferrucci L, Mattison JA, de Cabo R. Fasting blood glucose as a predictor of mortality: Lost in translation. Cell Metab 2021; 33:2189-2200.e3. [PMID: 34508697 PMCID: PMC9115768 DOI: 10.1016/j.cmet.2021.08.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 01/24/2021] [Accepted: 08/18/2021] [Indexed: 12/25/2022]
Abstract
Aging leads to profound changes in glucose homeostasis, weight, and adiposity, which are considered good predictors of health and survival in humans. Direct evidence that these age-associated metabolic alterations are recapitulated in animal models is lacking, impeding progress to develop and test interventions that delay the onset of metabolic dysfunction and promote healthy aging and longevity. We compared longitudinal trajectories, rates of change, and mortality risks of fasting blood glucose, body weight, and fat mass in mice, nonhuman primates, and humans throughout their lifespans and found similar trajectories of body weight and fat in the three species. In contrast, fasting blood glucose decreased late in life in mice but increased over the lifespan of nonhuman primates and humans. Higher glucose was associated with lower mortality in mice but higher mortality in nonhuman primates and humans, providing a cautionary tale for translating age-associated metabolic changes from mice to humans.
Collapse
Affiliation(s)
- Dushani L Palliyaguru
- Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA
| | - Eric J Shiroma
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, Baltimore, MD 21224, USA
| | - John K Nam
- Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA
| | - Eleonora Duregon
- Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA
| | | | - Nathan L Price
- Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA; Vascular Biology and Therapeutics Program, Integrative Cell Signaling and Neurobiology of Metabolism Program, Department of Comparative Medicine, Department of Pathology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Michel Bernier
- Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA
| | - Simonetta Camandola
- Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA
| | - Kelli L Vaughan
- Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA
| | - Ricki J Colman
- Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, WI 53715, USA
| | | | | | | | | | - Keisuke Ejima
- School of Public Health, Indiana University, Bloomington, IN 47405, USA
| | - Eleanor M Simonsick
- Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA
| | - Lenore J Launer
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, Baltimore, MD 21224, USA
| | - Chee W Chia
- Laboratory of Clinical Investigation, National Institute on Aging, Baltimore, MD 21224, USA
| | - Josephine Egan
- Laboratory of Clinical Investigation, National Institute on Aging, Baltimore, MD 21224, USA
| | - David B Allison
- School of Public Health, Indiana University, Bloomington, IN 47405, USA
| | | | - Rozalyn M Anderson
- Department of Medicine, University of Wisconsin-Madison and Geriatric Research Education and Clinical Center, William S. Middleton Memorial Veterans Hospital, Madison, WI 53705, USA
| | - Luigi Ferrucci
- Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA
| | - Julie A Mattison
- Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA
| | - Rafael de Cabo
- Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA.
| |
Collapse
|
10
|
Chaudhary M, Khan A, Gupta M. Skin Ageing: Pathophysiology and Current Market Treatment Approaches. Curr Aging Sci 2020; 13:22-30. [PMID: 31530270 PMCID: PMC7403684 DOI: 10.2174/1567205016666190809161115] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 07/31/2019] [Accepted: 07/31/2019] [Indexed: 04/15/2023]
Abstract
Ageing is a natural phenomenon which is a fold, ridge and crease in the skin that occurs due to loss of body mass, poor hydration, disintegration of dermis and epidermis junction. The Skin ageing process involves many changes that occur due to the combination of both endogenous factors (gene mutation, cellular metabolism, and hormonal factor) and exogenous factors (U.V, pollutants, chemical, and toxins). In 1950, the number of older people were found to be almost 205 million across the globe. But this number almost got 4 times by the year 2012 and the number of older persons increased to a massive amount of 810 million. The ageing of the skin occurs due to various mechanisms like glycation, free radical, cell cycle, and cellular and molecular mechanism of skin ageing. In this review article, we have discussed the treatment, worldwide newer therapies and marketed formulation that are currently available for the reduction of skin ageing. The most promising and revolutionizing field of nanotechnology is mostly applied in the field of dermatology, cosmetics, and biomedical applications. Nanotechnology also plays a vital role in increasing the efficacy of the product.
Collapse
Affiliation(s)
- Manupriya Chaudhary
- Department of Pharmaceutics, Delhi Pharmaceutical Sciences and Research University, Pushpvihar, Sector-3, M.B Road, New Delhi -110017, India
| | - Azmi Khan
- Department of Pharmaceutics, Delhi Pharmaceutical Sciences and Research University, Pushpvihar, Sector-3, M.B Road, New Delhi -110017, India
| | - Madhu Gupta
- Department of Pharmaceutics, Delhi Pharmaceutical Sciences and Research University, Pushpvihar, Sector-3, M.B Road, New Delhi -110017, India
| |
Collapse
|
11
|
Adiponectin homolog osmotin, a potential anti-obesity compound, suppresses abdominal fat accumulation in C57BL/6 mice on high-fat diet and in 3T3-L1 adipocytes. Int J Obes (Lond) 2019; 43:2422-2433. [PMID: 31164725 DOI: 10.1038/s41366-019-0383-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 03/26/2019] [Accepted: 04/01/2019] [Indexed: 12/12/2022]
Abstract
OBJECTIVES Obesity is characterized by excessive fat accumulation due to an imbalance between energy intake and expenditure. Osmotin, a plant derived natural protein, is a known homolog of adiponectin. To analyze the role of Osmotin in controlling energy metabolism by suppressing abdominal fat accumulation. METHODS We investigated the effects of osmotin in C57BL/6 mice on high-fat diet and in 3T3-L1 adipocytes by Biochemical tests, Immunofluorescence confocal Microscopy, RT-PCR, and Flow cytometry. RESULTS In this study, we investigated the anti-obesity effects of osmotin on adipocyte differentiation and regulation of the related factors lipolysis and glucose uptake in 3T3-L1 cells in vitro. Moreover, we analyzed the role of osmotin in prevention of insulin resistance, excess fat accumulation and metabolic syndrome in high-fat diet mouse model via AMPK and MAPK pathways in vivo. In addition, osmotin caused cell cycle arrest in G0/G1 phase by regulating expression of p21, p27 and CDK2 and improved glucose control, as concluded from glucose and insulin tolerance tests. CONCLUSION These results reveal the role of osmotin in AMPK downstream signaling. These results provide the first indication that osmotin exerts therapeutic effects on obesity, which could promote development of therapeutic aspects for obesity and related diseases.
Collapse
|
12
|
Serbezov D, Balabanski L, Hadjidekova S, Toncheva D. Genomics of longevity: recent insights from research on centenarians. BIOTECHNOL BIOTEC EQ 2018. [DOI: 10.1080/13102818.2018.1532317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Affiliation(s)
- Dimitar Serbezov
- Department of Medical Genetics, Faculty of Medicine, Medical University of Sofia, Sofia, Bulgaria
| | - Lubomir Balabanski
- Department of Medical Genetics, Faculty of Medicine, Medical University of Sofia, Sofia, Bulgaria
- Assisted Reproduction Clinic “Dr. Malinov”, Sofia, Bulgaria
| | - Savina Hadjidekova
- Department of Medical Genetics, Faculty of Medicine, Medical University of Sofia, Sofia, Bulgaria
| | - Draga Toncheva
- Department of Medical Genetics, Faculty of Medicine, Medical University of Sofia, Sofia, Bulgaria
- Assisted Reproduction Clinic “Dr. Malinov”, Sofia, Bulgaria
| |
Collapse
|
13
|
Cui XX, Yang X, Wang HJ, Rong XY, Jing S, Xie YH, Huang DF, Zhao C. Luteolin-7- O-Glucoside Present in Lettuce Extracts Inhibits Hepatitis B Surface Antigen Production and Viral Replication by Human Hepatoma Cells in Vitro. Front Microbiol 2017; 8:2425. [PMID: 29270164 PMCID: PMC5723679 DOI: 10.3389/fmicb.2017.02425] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 11/23/2017] [Indexed: 12/19/2022] Open
Abstract
Hepatitis B virus (HBV) infection is endemic in Asia and chronic hepatitis B (CHB) is a major public health issue worldwide. Current treatment strategies for CHB are not satisfactory as they induce a low rate of hepatitis B surface antigen (HBsAg) loss. Extracts were prepared from lettuce hydroponically cultivated in solutions containing glycine or nitrate as nitrogen sources. The lettuce extracts exerted potent anti-HBV effects in HepG2 cell lines in vitro, including significant HBsAg inhibition, HBV replication and transcription inhibition, without exerting cytotoxic effects. When used in combination interferon-alpha 2b (IFNα-2b) or lamivudine (3TC), the lettuce extracts synergistically inhibited HBsAg expression and HBV replication. By using differential metabolomics analysis, Luteolin-7-O-glucoside was identified and confirmed as a functional component of the lettuce extracts and exhibited similar anti-HBV activity as the lettuce extracts in vitro. The inhibition rate on HBsAg was up to 77.4%. Moreover, both the lettuce extracts and luteolin-7-O-glucoside functioned as organic antioxidants and, significantly attenuated HBV-induced intracellular reactive oxygen species (ROS) accumulation. Luteolin-7-O-glucoside also normalized ROS-induced mitochondrial membrane potential damage, which suggests luteolin-7-O-glucoside inhibits HBsAg and HBV replication via a mechanism involving the mitochondria. Our findings suggest luteolin-7-O-glucoside may have potential value for clinical application in CHB and may enhance HBsAg and HBV clearance when used as a combination therapy.
Collapse
Affiliation(s)
- Xiao-Xian Cui
- Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences and National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China.,Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xiao Yang
- Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Hui-Jing Wang
- Laboratory of Neuropsychopharmacology, College of Fundamental Medicine, Shanghai University of Medicine and Health Science, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong Hospital, Shanghai, China
| | - Xing-Yu Rong
- Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences and National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Sha Jing
- Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences and National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - You-Hua Xie
- Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences and National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China.,Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Dan-Feng Huang
- Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Chao Zhao
- Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences and National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong Hospital, Shanghai, China
| |
Collapse
|
14
|
Lettieri-Barbato D, Giovannetti E, Aquilano K. Effects of dietary restriction on adipose mass and biomarkers of healthy aging in human. Aging (Albany NY) 2017; 8:3341-3355. [PMID: 27899768 PMCID: PMC5270672 DOI: 10.18632/aging.101122] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 11/16/2016] [Indexed: 12/22/2022]
Abstract
In developing countries the rise of obesity and obesity-related metabolic disorders, such as cardiovascular diseases and type 2 diabetes, reflects the changes in lifestyle habits and wrong dietary choices. Dietary restriction (DR) regimens have been shown to extend health span and lifespan in many animal models including primates. Identifying biomarkers predictive of clinical benefits of treatment is one of the primary goals of precision medicine. To monitor the clinical outcomes of DR interventions in humans, several biomarkers are commonly adopted. However, a validated link between the behaviors of such biomarkers and DR effects is lacking at present time. Through a systematic analysis of human intervention studies, we evaluated the effect size of DR (i.e. calorie restriction, very low calorie diet, intermittent fasting, alternate day fasting) on health-related biomarkers. We found that DR is effective in reducing total and visceral adipose mass and improving inflammatory cytokines profile and adiponectin/leptin ratio. By analysing the levels of canonical biomarkers of healthy aging, we also validated the changes of insulin, IGF-1 and IGFBP-1,2 to monitor DR effects. Collectively, we developed a useful platform to evaluate the human responses to dietary regimens low in calories.
Collapse
Affiliation(s)
| | | | - Katia Aquilano
- Department of Biology, University of Rome Tor Vergata, Rome, Italy.,IRCCS San Raffaele La Pisana, Rome, Italy
| |
Collapse
|
15
|
The Preconditioning of Berberine Suppresses Hydrogen Peroxide-Induced Premature Senescence via Regulation of Sirtuin 1. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:2391820. [PMID: 28751929 PMCID: PMC5511663 DOI: 10.1155/2017/2391820] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 05/23/2017] [Indexed: 12/25/2022]
Abstract
With a long history of application in Chinese traditional medicine, berberine (BBR) was reported to exhibit healthspan-extending properties in some age-related diseases, such as type 2 diabetes and atherosclerosis. However, the antiaging mechanism of BBR is not completely clear. By means of hydrogen peroxide- (H2O2-) induced premature cellular senescence model, we found that a low-concentration preconditioning of BBR could resist premature senescence in human diploid fibroblasts (HDFs) measured by senescence-associated β-galactosidase (SA-β-gal), accompanied by a decrease in loss of mitochondrial membrane potential and production of intracellular reactive oxygen species (ROS). Moreover, the low-concentration preconditioning of BBR could make cells less susceptible to subsequent H2O2-induced cell cycle arrest and growth inhibition. Experimental results further showed that the low concentration of BBR could induce a slight increase of ROS and upregulate the expression level of sirtuin 1 (SIRT1), an important longevity regulator. H2O2-induced activation of checkpoint kinase 2 (Chk2) was significantly attenuated after the preconditioning of BBR. The present findings implied that the low-concentration preconditioning of BBR could have a mitohormetic effect against cellular senescence triggered by oxidative stress in some age-related diseases through the regulation of SIRT1.
Collapse
|
16
|
Tsuchiya T, Endo A, Tsujikado K, Inukai T. Involvement of Resveratrol and ω-3 Polyunsaturated Fatty Acids on Sirtuin 1 Gene Expression in THP1 Cells. Am J Med Sci 2017; 354:415-422. [PMID: 29078847 DOI: 10.1016/j.amjms.2017.06.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 05/02/2017] [Accepted: 06/07/2017] [Indexed: 12/20/2022]
Abstract
BACKGROUND Resveratrol, a kind of polyphenol, has the potential to activate the longevity gene in several cells, in the same manner as calorie restriction. We investigated the effect of resveratrol and ω-3-line polyunsaturated fatty acid on surtuin 1 (SIRT1) gene expression in human monocytes (THP1) cells. MATERIALS AND METHODS We examined the gene expression of THP1 cells using real-time polymerase chain reaction and Western blotting analysis. Resveratol, eicosapentaenoic acid (EPA) and docosahexaeanoic acid (DHA) as n-3 polyunsaturated fatty acid were added on THP1 cells. We observed the changes in the SIRT1 gene expression in those cells, under various doses of agents and in time courses. Then, we examined the interaction of glucose and mannitol on those agents׳ effect of the gene expression. The concentration range of glucose and mannitol was from 5-20mM, respectively. RESULTS The SIRT1 gene expression could be defined in 24 and 48 hours both in real-time polymerase chain reaction analysis and in Western blotting. Resveratrol showed SIRT1 gene expression in a dose-dependent manner in the range of 0-20μM in both analyses. Although EPA at 10μM showed marked increase in SIRT1 gene expression compared to control condition in Western blotting, this phenomenon was not in dose-dependent manner. DHA did not exhibit any augmentation of SIRT1 gene expression in a dose-dependent manner in the range of 0-20μM in both analyses. We refined the dose-dependent inhibition of the SIRT1 gene expression within 20mM glucose medium. Although 20mM did not exhibit any inhibition, 10μM resveratrol induced the gene expression compared to control medium. Both 5 and 15mM mannitol medium did not significantly alter basic gene expression and 10μM resveratrol-induced gene expression. CONCLUSIONS The present results suggest that resveratrol and EPA, but not DHA, markedly activated the SIRT1 gene expression in THP1 cells, and that high glucose medium could inhibit the basic gene expression, but not powerful resveratrol-induced gene expression, in those cells.
Collapse
Affiliation(s)
- Takafumi Tsuchiya
- Department of Internal Medicine, Koshigaya Hospital, Dokkyo Medical University, Koshigaya, Japan
| | - Ayano Endo
- Department of Joint Research Center, Koshigaya Hospital, Dokkyo Medical University, Koshigaya, Japan
| | - Kyoko Tsujikado
- Department of Joint Research Center, Koshigaya Hospital, Dokkyo Medical University, Koshigaya, Japan
| | - Toshihiko Inukai
- Department of Internal Medicine, Koshigaya Hospital, Dokkyo Medical University, Koshigaya, Japan.
| |
Collapse
|
17
|
The association between personal income and aging: A population-based 13-year longitudinal study. Arch Gerontol Geriatr 2017; 70:76-83. [DOI: 10.1016/j.archger.2017.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 12/23/2016] [Accepted: 01/02/2017] [Indexed: 11/22/2022]
|
18
|
López R, Smith PC, Göstemeyer G, Schwendicke F. Ageing, dental caries and periodontal diseases. J Clin Periodontol 2017; 44 Suppl 18:S145-S152. [DOI: 10.1111/jcpe.12683] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/01/2016] [Indexed: 12/30/2022]
Affiliation(s)
- Rodrigo López
- Section of Periodontology; Department of Dentistry and Oral Health; Aarhus University; Aarhus Denmark
| | - Patricio C Smith
- Dentistry Academic Unit; Faculty of Medicine; Pontificia Universidad Católica de Chile; Santiago Chile
| | - Gerd Göstemeyer
- Department of Operative and Preventive Dentistry; Charité - Universitätsmedizin Berlin; Berlin Germany
| | - Falk Schwendicke
- Department of Operative and Preventive Dentistry; Charité - Universitätsmedizin Berlin; Berlin Germany
| |
Collapse
|
19
|
Riedel BC, Thompson PM, Brinton RD. Age, APOE and sex: Triad of risk of Alzheimer's disease. J Steroid Biochem Mol Biol 2016; 160:134-47. [PMID: 26969397 PMCID: PMC4905558 DOI: 10.1016/j.jsbmb.2016.03.012] [Citation(s) in RCA: 354] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Revised: 03/02/2016] [Accepted: 03/06/2016] [Indexed: 02/06/2023]
Abstract
Age, apolipoprotein E ε4 (APOE) and chromosomal sex are well-established risk factors for late-onset Alzheimer's disease (LOAD; AD). Over 60% of persons with AD harbor at least one APOE-ε4 allele. The sex-based prevalence of AD is well documented with over 60% of persons with AD being female. Evidence indicates that the APOE-ε4 risk for AD is greater in women than men, which is particularly evident in heterozygous women carrying one APOE-ε4 allele. Paradoxically, men homozygous for APOE-ε4 are reported to be at greater risk for mild cognitive impairment and AD. Herein, we discuss the complex interplay between the three greatest risk factors for Alzheimer's disease, age, APOE-ε4 genotype and chromosomal sex. We propose that the convergence of these three risk factors, and specifically the bioenergetic aging perimenopause to menopause transition unique to the female, creates a risk profile for AD unique to the female. Further, we discuss the specific risk of the APOE-ε4 positive male which appears to emerge early in the aging process. Evidence for impact of the triad of AD risk factors is most evident in the temporal trajectory of AD progression and burden of pathology in relation to APOE genotype, age and sex. Collectively, the data indicate complex interactions between age, APOE genotype and gender that belies a one size fits all approach and argues for a precision medicine approach that integrates across the three main risk factors for Alzheimer's disease.
Collapse
Affiliation(s)
- Brandalyn C Riedel
- Neuroscience Graduate Program, University of Southern California, Los Angeles, CA 90089, USA
| | - Paul M Thompson
- USC Institute for Neuroimaging and Informatics, University of Southern California, Marina del Rey, CA 90292, USA
| | - Roberta Diaz Brinton
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, Department of Neurology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA.
| |
Collapse
|
20
|
Cui C, Qi J, Deng Q, Chen R, Zhai D, Yu J. Nicotinamide Mononucleotide Adenylyl Transferase 2: A Promising Diagnostic and Therapeutic Target for Colorectal Cancer. BIOMED RESEARCH INTERNATIONAL 2016; 2016:1804137. [PMID: 27218101 PMCID: PMC4863092 DOI: 10.1155/2016/1804137] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 01/22/2016] [Accepted: 03/15/2016] [Indexed: 01/05/2023]
Abstract
Colorectal cancer (CRC) is one of the most common cancers all over the world. It is essential to search for more effective diagnostic and therapeutic methods for CRC. Abnormal nicotinamide adenine dinucleotide (NAD) metabolism has been considered as a characteristic of cancer cells. In this study, nicotinamide mononucleotide adenylyl transferases (NMNATs) as well as p53-mediated cancer signaling pathways were investigated in patients with colorectal cancer. The CRC tissues and adjacent normal tissues were obtained from 95 untreated colorectal cancer patients and were stained for expression of nicotinamide mononucleotide adenylyl transferase 2 (NMNAT2) and p53. The survival rate was analyzed by the Kaplan-Meier method and the log-rank test. The multivariate Cox proportional hazard regression analysis was conducted as well. Our data demonstrated that expression of NMNAT2 and p53 was significantly higher in CRC tissues, while NMNAT2 expression is in correlation with the invasive depth of tumors and TNM stage. Significant positive correlation was found between the expression of NMNAT2 and the expression of p53. However, NMNAT2 expression was not a statistically significant prognostic factor for overall survival. In conclusion, our results indicated that NMNAT2 might participate in tumorigenesis of CRC in a p53-dependent manner and NMNAT2 expression might be a potential therapeutic target for CRC.
Collapse
Affiliation(s)
- Chunhui Cui
- Department of General Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Jia Qi
- Department of General Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Quanwen Deng
- Section of Medicinal Material, Southern Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Rihong Chen
- Department of General Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Duanyang Zhai
- Department of General Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Jinlong Yu
- Department of General Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| |
Collapse
|
21
|
Castillo-Quan JI, Kinghorn KJ, Bjedov I. Genetics and pharmacology of longevity: the road to therapeutics for healthy aging. ADVANCES IN GENETICS 2015; 90:1-101. [PMID: 26296933 DOI: 10.1016/bs.adgen.2015.06.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Aging can be defined as the progressive decline in tissue and organismal function and the ability to respond to stress that occurs in association with homeostatic failure and the accumulation of molecular damage. Aging is the biggest risk factor for human disease and results in a wide range of aging pathologies. Although we do not completely understand the underlying molecular basis that drives the aging process, we have gained exceptional insights into the plasticity of life span and healthspan from the use of model organisms such as the worm Caenorhabditis elegans and the fruit fly Drosophila melanogaster. Single-gene mutations in key cellular pathways that regulate environmental sensing, and the response to stress, have been identified that prolong life span across evolution from yeast to mammals. These genetic manipulations also correlate with a delay in the onset of tissue and organismal dysfunction. While the molecular genetics of aging will remain a prosperous and attractive area of research in biogerontology, we are moving towards an era defined by the search for therapeutic drugs that promote healthy aging. Translational biogerontology will require incorporation of both therapeutic and pharmacological concepts. The use of model organisms will remain central to the quest for drug discovery, but as we uncover molecular processes regulated by repurposed drugs and polypharmacy, studies of pharmacodynamics and pharmacokinetics, drug-drug interactions, drug toxicity, and therapeutic index will slowly become more prevalent in aging research. As we move from genetics to pharmacology and therapeutics, studies will not only require demonstration of life span extension and an underlying molecular mechanism, but also the translational relevance for human health and disease prevention.
Collapse
Affiliation(s)
- Jorge Iván Castillo-Quan
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK; Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, London, UK
| | - Kerri J Kinghorn
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK; Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, London, UK
| | - Ivana Bjedov
- Cancer Institute, University College London, London, UK
| |
Collapse
|
22
|
Greco S, Gorospe M, Martelli F. Noncoding RNA in age-related cardiovascular diseases. J Mol Cell Cardiol 2015; 83:142-55. [PMID: 25640162 PMCID: PMC5509469 DOI: 10.1016/j.yjmcc.2015.01.011] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 01/20/2015] [Accepted: 01/21/2015] [Indexed: 12/14/2022]
Abstract
Eukaryotic gene expression is tightly regulated transcriptionally and post-transcriptionally by a host of noncoding (nc)RNAs. The best-studied class of short ncRNAs, microRNAs, mainly repress gene expression post-transcriptionally. Long noncoding (lnc)RNAs, which comprise RNAs differing widely in length and function, can regulate gene transcription as well as post-transcriptional mRNA fate. Collectively, ncRNAs affect a broad range of age-related physiologic deteriorations and pathologies, including reduced cardiovascular vigor and age-associated cardiovascular disease. This review presents an update of our understanding of regulatory ncRNAs contributing to cardiovascular health and disease as a function of advancing age. We will discuss (1) regulatory ncRNAs that control aging-associated cardiovascular homeostasis and disease, (2) the concepts, approaches, and methodologies needed to study regulatory ncRNAs in cardiovascular aging and (3) the challenges and opportunities that age-associated regulatory ncRNAs present in cardiovascular physiology and pathology. This article is part of a Special Issue entitled "CV Aging".
Collapse
Affiliation(s)
- Simona Greco
- Laboratory of Molecular Cardiology, Policlinico San Donato-IRCCS, Milan, 20097, Italy
| | - Myriam Gorospe
- Laboratory of Genetics, National Institute on Aging-Intramural Research Program, NIH, Baltimore, MD 21224, USA.
| | - Fabio Martelli
- Laboratory of Molecular Cardiology, Policlinico San Donato-IRCCS, Milan, 20097, Italy.
| |
Collapse
|
23
|
Zhang T, Kho DH, Wang Y, Harazono Y, Nakajima K, Xie Y, Raz A. Gp78, an E3 ubiquitin ligase acts as a gatekeeper suppressing nonalcoholic steatohepatitis (NASH) and liver cancer. PLoS One 2015; 10:e0118448. [PMID: 25789613 PMCID: PMC4366401 DOI: 10.1371/journal.pone.0118448] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 01/16/2015] [Indexed: 12/13/2022] Open
Abstract
Nonalcoholic steatohepatitis (NASH) is related to metabolic dysregulation and the perturbation of endoplasmic reticulum (ER) homeostasis that frequently develops into hepatocellular carcinoma (HCC). Gp78 is E3 ligase, which regulates endoplasmic reticulum-associated degradation (ERAD) by ubiquitinylation of misfolded ER proteins. Here, we report that upon ageing (12 months), gp78-/- mice developed obesity, recapitulating age-related human NASH. Liver histology of gp78-/- mice revealed typical steatosis, hepatic inflammation and fibrosis, followed by progression to hepatocellular tumors. Acute ER stress revealed that loss of gp78 results in up regulation of unfolded protein response (UPR) pathways and SREBP-1 regulating de novo lipogenesis, responsible for fatty liver. Tissue array of human hepatocellular carcinoma (HCC) demonstrated that the expression of gp78 was inversely correlated with clinical grades of cancer. Here, we have described the generation of the first preclinical experimental model system which spontaneously develops age-related NASH and HCC, linking ERAD to hepatosteatosis, cirrhosis, and cancer. It suggests that gp78 is a regulator of normal liver homeostasis and a tumor suppressor in human liver.
Collapse
Affiliation(s)
- Tianpeng Zhang
- Departments of Oncology and Pathology, Wayne State University School of Medicine and the Karmanos Cancer Institute, Detroit, Michigan, United States of America
| | - Dhong Hyo Kho
- Departments of Oncology and Pathology, Wayne State University School of Medicine and the Karmanos Cancer Institute, Detroit, Michigan, United States of America
| | - Ying Wang
- Departments of Oncology and Pathology, Wayne State University School of Medicine and the Karmanos Cancer Institute, Detroit, Michigan, United States of America
| | - Yosuke Harazono
- Departments of Oncology and Pathology, Wayne State University School of Medicine and the Karmanos Cancer Institute, Detroit, Michigan, United States of America
| | - Kosei Nakajima
- Departments of Oncology and Pathology, Wayne State University School of Medicine and the Karmanos Cancer Institute, Detroit, Michigan, United States of America
| | - Youming Xie
- Departments of Oncology and Pathology, Wayne State University School of Medicine and the Karmanos Cancer Institute, Detroit, Michigan, United States of America
| | - Avraham Raz
- Departments of Oncology and Pathology, Wayne State University School of Medicine and the Karmanos Cancer Institute, Detroit, Michigan, United States of America
- * E-mail:
| |
Collapse
|
24
|
Pan LZ, Ahn DG, Sharif T, Clements D, Gujar SA, Lee PWK. The NAD+ synthesizing enzyme nicotinamide mononucleotide adenylyltransferase 2 (NMNAT-2) is a p53 downstream target. Cell Cycle 2014; 13:1041-8. [PMID: 24552824 DOI: 10.4161/cc.28128] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
NAD(+) metabolism plays key roles not only in energy production but also in diverse cellular physiology. Aberrant NAD(+) metabolism is considered a hallmark of cancer. Recently, the tumor suppressor p53, a major player in cancer signaling pathways, has been implicated as an important regulator of cellular metabolism. This notion led us to examine whether p53 can regulate NAD(+) biosynthesis in the cell. Our search resulted in the identification of nicotinamide mononucleotide adenylyltransferase 2 (NMNAT-2), a NAD(+) synthetase, as a novel downstream target gene of p53. We show that NMNAT-2 expression is induced upon DNA damage in a p53-dependent manner. Two putative p53 binding sites were identified within the human NMNAT-2 gene, and both were found to be functional in a p53-dependent manner. Furthermore, knockdown of NMNAT-2 significantly reduces cellular NAD(+) levels and protects cells from p53-dependent cell death upon DNA damage, suggesting an important functional role of NMNAT-2 in p53-mediated signaling. Our demonstration that p53 modulates cellular NAD(+) synthesis is congruent with p53's emerging role as a key regulator of metabolism and related cell fate.
Collapse
Affiliation(s)
- Lu-Zhe Pan
- Department of Microbiology and Immunology; Dalhousie University; Halifax, Nova Scotia, Canada
| | - Dae-Gyun Ahn
- Department of Microbiology and Immunology; Dalhousie University; Halifax, Nova Scotia, Canada
| | - Tanveer Sharif
- Department of Microbiology and Immunology; Dalhousie University; Halifax, Nova Scotia, Canada
| | - Derek Clements
- Department of Pathology; Dalhousie University; Halifax, Nova Scotia, Canada
| | - Shashi A Gujar
- Department of Microbiology and Immunology; Dalhousie University; Halifax, Nova Scotia, Canada; Strategy & Organizational Performance; IWK Health Centre; Halifax, Nova Scotia, Canada
| | - Patrick W K Lee
- Department of Microbiology and Immunology; Dalhousie University; Halifax, Nova Scotia, Canada; Department of Pathology; Dalhousie University; Halifax, Nova Scotia, Canada
| |
Collapse
|
25
|
Boyette LB, Tuan RS. Adult Stem Cells and Diseases of Aging. J Clin Med 2014; 3:88-134. [PMID: 24757526 PMCID: PMC3992297 DOI: 10.3390/jcm3010088] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 12/15/2013] [Accepted: 12/17/2013] [Indexed: 02/06/2023] Open
Abstract
Preservation of adult stem cells pools is critical for maintaining tissue homeostasis into old age. Exhaustion of adult stem cell pools as a result of deranged metabolic signaling, premature senescence as a response to oncogenic insults to the somatic genome, and other causes contribute to tissue degeneration with age. Both progeria, an extreme example of early-onset aging, and heritable longevity have provided avenues to study regulation of the aging program and its impact on adult stem cell compartments. In this review, we discuss recent findings concerning the effects of aging on stem cells, contributions of stem cells to age-related pathologies, examples of signaling pathways at work in these processes, and lessons about cellular aging gleaned from the development and refinement of cellular reprogramming technologies. We highlight emerging therapeutic approaches to manipulation of key signaling pathways corrupting or exhausting adult stem cells, as well as other approaches targeted at maintaining robust stem cell pools to extend not only lifespan but healthspan.
Collapse
Affiliation(s)
- Lisa B Boyette
- Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA; ; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Rocky S Tuan
- Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA; ; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA ; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
| |
Collapse
|
26
|
Thibault O, Anderson KL, DeMoll C, Brewer LD, Landfield PW, Porter NM. Hippocampal calcium dysregulation at the nexus of diabetes and brain aging. Eur J Pharmacol 2013; 719:34-43. [PMID: 23872402 DOI: 10.1016/j.ejphar.2013.07.024] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Accepted: 07/11/2013] [Indexed: 01/19/2023]
Abstract
Recently it has become clear that conditions of insulin resistance/metabolic syndrome, obesity and diabetes, are linked with moderate cognitive impairment in normal aging and elevated risk of Alzheimer's disease. It appears that a common feature of these conditions is impaired insulin signaling, affecting the brain as well as peripheral target tissues. A number of studies have documented that insulin directly affects brain processes and that reduced insulin signaling results in impaired learning and memory. Several studies have also shown that diabetes induces Ca(2+) dysregulation in neurons. Because brain aging is associated with substantial Ca(2+) dyshomeostasis, it has been proposed that impaired insulin signaling exacerbates or accelerates aging-related Ca(2+) dyshomeostasis. However, there have been few studies examining insulin interactions with Ca(2+) regulation in aging animals. We have been testing predictions of the Ca(2+) dysregulation/diabetes/brain aging hypothesis and have found that insulin and insulin-sensitizers (thiazolidinediones) target several hippocampal Ca(2+)-related processes affected by aging. The drugs appear able to reduce the age-dependent increase in Ca(2+) transients and the Ca(2+) -sensitive afterhyperpolarization. Thus, while additional testing is needed, the results to date are consistent with the view that strategies that enhance insulin signaling can counteract the effect of aging on Ca(2+) dysregulation.
Collapse
Affiliation(s)
- Olivier Thibault
- Department of Molecular and Biomedical Pharmacology, MS 313, 800 Rose Street, University of Kentucky Medical Center, Lexington, KY 40536, United States.
| | - Katie L Anderson
- Department of Molecular and Biomedical Pharmacology, MS 313, 800 Rose Street, University of Kentucky Medical Center, Lexington, KY 40536, United States
| | - Chris DeMoll
- Department of Molecular and Biomedical Pharmacology, MS 313, 800 Rose Street, University of Kentucky Medical Center, Lexington, KY 40536, United States
| | - Lawrence D Brewer
- Department of Molecular and Biomedical Pharmacology, MS 313, 800 Rose Street, University of Kentucky Medical Center, Lexington, KY 40536, United States
| | - Philip W Landfield
- Department of Molecular and Biomedical Pharmacology, MS 313, 800 Rose Street, University of Kentucky Medical Center, Lexington, KY 40536, United States
| | - Nada M Porter
- Department of Molecular and Biomedical Pharmacology, MS 313, 800 Rose Street, University of Kentucky Medical Center, Lexington, KY 40536, United States
| |
Collapse
|
27
|
Bonnefond A, Skrobek B, Lobbens S, Eury E, Thuillier D, Cauchi S, Lantieri O, Balkau B, Riboli E, Marre M, Charpentier G, Yengo L, Froguel P. Association between large detectable clonal mosaicism and type 2 diabetes with vascular complications. Nat Genet 2013; 45:1040-3. [PMID: 23852171 DOI: 10.1038/ng.2700] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Accepted: 06/19/2013] [Indexed: 12/15/2022]
Abstract
Large chromosomal clonal mosaic events (CMEs) have been suggested to be linked to aging and to predict cancer. Type 2 diabetes (T2D) has been conceptualized as an accelerated-aging disease and is associated with higher prevalence of cancers. Here we aimed to assess the association between T2D and CME occurrence in blood. We evaluated the presence of CMEs in 7,659 individuals (including 2,208 with T2D) using DNA arrays. A significant association between CME occurrence and T2D was found (odds ratio (OR) = 5.3; P = 5.1 × 10(-5)) and was stronger when we only considered non-obese individuals with T2D (OR = 5.6; P = 4.9 × 10(-5)). Notably, CME carriers with T2D had higher prevalence of vascular complications than non-carriers with T2D (71.4% versus 37.1%, respectively; P = 7.7 × 10(-4)). In CME carriers, we found an increase in the percentage of abnormal cells over 6 years (P = 8.60 × 10(-3)). In conclusion, given the increased risk of cancer in CME carriers, our results may have profound clinical implications in patients with severe T2D.
Collapse
Affiliation(s)
- Amélie Bonnefond
- Centre National de Recherche Scientifique (CNRS) Unité Mixte de Recherche 8199, Lille Pasteur Institute, Lille, France
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Caveolin-1 Is Necessary for Hepatic Oxidative Lipid Metabolism: Evidence for Crosstalk between Caveolin-1 and Bile Acid Signaling. Cell Rep 2013; 4:238-47. [DOI: 10.1016/j.celrep.2013.06.017] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2012] [Revised: 03/04/2013] [Accepted: 06/14/2013] [Indexed: 12/14/2022] Open
|
29
|
Abstract
The present review will explore the insights gained into inositol pyrophosphates in the 20 years since their discovery in 1993. These molecules are defined by the presence of the characteristic ‘high energy’ pyrophosphate moiety and can be found ubiquitously in eukaryotic cells. The enzymes that synthesize them are similarly well distributed and can be found encoded in any eukaryote genome. Rapid progress has been made in characterizing inositol pyrophosphate metabolism and they have been linked to a surprisingly diverse range of cellular functions. Two decades of work is now beginning to present a view of inositol pyrophosphates as fundamental, conserved and highly important agents in the regulation of cellular homoeostasis. In particular it is emerging that energy metabolism, and thus ATP production, is closely regulated by these molecules. Much of the early work on these molecules was performed in the yeast Saccharomyces cerevisiae and the social amoeba Dictyostelium discoideum, but the development of mouse knockouts for IP6K1 and IP6K2 [IP6K is IP6 (inositol hexakisphosphate) kinase] in the last 5 years has provided very welcome tools to better understand the physiological roles of inositol pyrophosphates. Another recent innovation has been the use of gel electrophoresis to detect and purify inositol pyrophosphates. Despite the advances that have been made, many aspects of inositol pyrophosphate biology remain far from clear. By evaluating the literature, the present review hopes to promote further research in this absorbing area of biology.
Collapse
|
30
|
Pancani T, Anderson KL, Brewer LD, Kadish I, DeMoll C, Landfield PW, Blalock EM, Porter NM, Thibault O. Effect of high-fat diet on metabolic indices, cognition, and neuronal physiology in aging F344 rats. Neurobiol Aging 2013; 34:1977-87. [PMID: 23545425 DOI: 10.1016/j.neurobiolaging.2013.02.019] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Revised: 01/31/2013] [Accepted: 02/22/2013] [Indexed: 01/05/2023]
Abstract
The prevalence of obesity and type 2 diabetes increases with age. Despite this, few studies have examined these conditions simultaneously in aged animals, and fewer studies have measured the impact of these conditions on brain function. Using an established animal model of brain aging (F344 rats), we investigated whether a high-fat diet (HFD) exacerbates cognitive decline and the hippocampal calcium-dependent afterhyperpolarization (a marker of age-dependent calcium dysregulation). Young and mid-aged animals were maintained on control or HFD for 4.5 months, and peripheral metabolic variables, cognitive function, and electrophysiological responses to insulin in the hippocampus were measured. HFD increased lipid accumulation in the periphery, although overt diabetes did not develop, nor were spatial learning and memory altered. Hippocampal adiponectin levels were reduced in aging animals but were unaffected by HFD. For the first time, however, we show that the AHP is sensitive to insulin, and that this sensitivity is reduced by HFD. Interestingly, although peripheral glucose regulation was relatively insensitive to HFD, the brain appeared to show greater sensitivity to HFD in F344 rats.
Collapse
Affiliation(s)
- Tristano Pancani
- Department of Molecular and Biomedical Pharmacology, University of Kentucky Medical Center, Lexington, KY 40536-0084, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Abstract
Age is the main risk factor for the prevalent diseases of developed countries: cancer, cardiovascular disease and neurodegeneration. The ageing process is deleterious for fitness, but can nonetheless evolve as a consequence of the declining force of natural selection at later ages, attributable to extrinsic hazards to survival: ageing can then occur as a side-effect of accumulation of mutations that lower fitness at later ages, or of natural selection in favour of mutations that increase fitness of the young but at the cost of a higher subsequent rate of ageing. Once thought of as an inexorable, complex and lineage-specific process of accumulation of damage, ageing has turned out to be influenced by mechanisms that show strong evolutionary conservation. Lowered activity of the nutrient-sensing insulin/insulin-like growth factor/Target of Rapamycin signalling network can extend healthy lifespan in yeast, multicellular invertebrates, mice and, possibly, humans. Mitochondrial activity can also promote ageing, while genome maintenance and autophagy can protect against it. We discuss the relationship between evolutionarily conserved mechanisms of ageing and disease, and the associated scientific challenges and opportunities.
Collapse
Affiliation(s)
- Teresa Niccoli
- Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, Darwin Building, Gower St, London WC1E 6BT, UK
| | | |
Collapse
|
32
|
Abstract
Dry eye is one of the most common eye disorders affecting millions of people. It causes ocular irritation or discomfort, and decreases functional vision, causing a dramatic deterioration in the quality of life. Although new treatments such as the P2Y2 agonist or cyclosporine eye drops have been developed and a certain level of patient satisfaction can now be obtained, no fundamental treatment has been developed. Currently, there is no therapy available to recover lacrimal function to its normal status. Recent progress in the understanding of aging has laid the foundations for a new way of thinking about intervention of the aging process. Because dry eye is accelerated by aging, a useful approach for the prevention or treatment of dry eye may be to interfere with the aging process. In the scientific community, there is a global consensus that calorie restriction can extend the life span of various kinds of animals, establishing an intervention to aging. Another important hypothesis believed to be involved in aging is the free radical theory. According to these theories, the aging process may be managed by controlling levels of calories or reactive oxygen species. In this review, these 2 important aging theories, calorie restriction and free radical aging, are examined, and we discuss how to apply these theories to the prevention and treatment of dry eye.
Collapse
|
33
|
Abstract
Chronic disease is a major social challenge of the twenty-first century. In this review, we examine the evidence for discordance between modern diets and those on which humankind evolved as the cause of the increasing incidence of chronic diseases, and the evidence supporting consumption of plant foods as a way to reduce the risk of chronic disease. We also examine the evidence for avoiding certain components of plant-based foods that are enriched in Western diets, and review the mechanisms by which different phytonutrients are thought to reduce the risk of chronic disease. This body of evidence strongly suggests that consuming more fruits and vegetables could contribute both to medical nutrition therapies, as part of a package of treatments for conditions like type 2 diabetes, heart disease, cancer, and obesity, and to the prevention of these diseases. Plant science should be directed toward improving the quality of plant-based foods by building on our improved understanding of the complex relationships between plants, our diet, and our health.
Collapse
Affiliation(s)
- Cathie Martin
- Department of Metabolic Biology, John Innes Center, Norwich NR4 7UH, United Kingdom.
| | | | | | | |
Collapse
|
34
|
Lee JS, Park AH, Lee SH, Lee SH, Kim JH, Yang SJ, Yeom YI, Kwak TH, Lee D, Lee SJ, Lee CH, Kim JM, Kim D. Beta-lapachone, a modulator of NAD metabolism, prevents health declines in aged mice. PLoS One 2012; 7:e47122. [PMID: 23071729 PMCID: PMC3469505 DOI: 10.1371/journal.pone.0047122] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Accepted: 09/10/2012] [Indexed: 12/26/2022] Open
Abstract
NADH-quinone oxidoreductase 1 (NQO1) modulates cellular NAD+/NADH ratio which has been associated with the aging and anti-aging mechanisms of calorie restriction (CR). Here, we demonstrate that the facilitation of NQO1 activity by feeding β-lapachone (βL), an exogenous NQO1 co-substrate, prevented age-dependent decline of motor and cognitive function in aged mice. βL-fed mice did not alter their food-intake or locomotor activity but did increase their energy expenditure as measured by oxygen consumption and heat generation. Mitochondrial structure and numbers were disorganized and decreased in the muscles of control diet group but those defects were less severe in βL-fed aged mice. Furthermore, for a subset of genes associated with energy metabolism, mice fed the βL-diet showed similar changes in gene expression to the CR group (fed 70% of the control diet). These results support the potentiation of NQO1 activity by a βL diet and could be an option for preventing age-related decline of muscle and brain functions.
Collapse
Affiliation(s)
- Jeong-sook Lee
- Department of Biological Sciences, KAIST (Korea Advanced Institute of Science and Technology), Daejeon, Korea
| | - Ah Hyung Park
- Department of Biological Sciences, KAIST (Korea Advanced Institute of Science and Technology), Daejeon, Korea
| | - Sang-Hee Lee
- Department of Pathology and Infection Signaling Network Research Center, Chungnam National University School of Medicine, Daejeon, Korea
| | | | | | - Suk-Jin Yang
- Medical Genomics Research Center, KRIBB (Korea Research Institute of Bioscience and Biotechnology), Daejeon, Korea
| | - Young Il Yeom
- Medical Genomics Research Center, KRIBB (Korea Research Institute of Bioscience and Biotechnology), Daejeon, Korea
| | | | - Dongyeop Lee
- Division of Molecular and Life Science, POSTECH (Pohang University of Science and Technology), Pohang, Kyungbuk, Korea
| | - Seung-Jae Lee
- Division of Molecular and Life Science, POSTECH (Pohang University of Science and Technology), Pohang, Kyungbuk, Korea
| | - Chul-Ho Lee
- Animal Model Center, KRIBB (Korea Research Institute of Bioscience and Biotechnology), Daejeon, Korea
| | - Jin Man Kim
- Department of Pathology and Infection Signaling Network Research Center, Chungnam National University School of Medicine, Daejeon, Korea
| | - Daesoo Kim
- Department of Biological Sciences, KAIST (Korea Advanced Institute of Science and Technology), Daejeon, Korea
- * E-mail:
| |
Collapse
|
35
|
Monickaraj F, Aravind S, Gokulakrishnan K, Sathishkumar C, Prabu P, Prabu D, Mohan V, Balasubramanyam M. Accelerated aging as evidenced by increased telomere shortening and mitochondrial DNA depletion in patients with type 2 diabetes. Mol Cell Biochem 2012; 365:343-50. [PMID: 22411737 DOI: 10.1007/s11010-012-1276-0] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Accepted: 02/24/2012] [Indexed: 12/13/2022]
Abstract
Although shortened telomeres were shown associated with several risk factors of diabetes, there is lack of data on their relationship with mitochondrial dysfunction. Therefore, we compared the relationship between telomere length and mitochondrial DNA (mtDNA) content in patients with type 2 diabetes mellitus (T2DM; n = 145) and in subjects with normal glucose tolerance (NGT; n = 145). Subjects were randomly recruited from the Chennai Urban Rural Epidemiology Study. mtDNA content and telomere length were assessed by Real-Time PCR. Malonodialdehyde, a marker of lipid peroxidation was measured by thiobarbituric acid reactive substances (TBARS) using fluorescence methodology. Adiponectin levels were measured by radioimmunoassay. Oxidative stress as determined by lipid peroxidation (TBARS) was significantly (p < 0.001) higher in patients with T2DM compared to NGT subjects. In contrast, the mean telomere length, adiponectin and mtDNA content were significantly (p < 0.001) lower in patients with T2DM compared to NGT subjects. Telomere length was positively correlated with adiponectin, HDL, mtDNA content and good glycemic/lipid control and negatively correlated with adiposity and insulin resistance. On regression analysis, shortened telomeres showed significant association with T2DM even after adjusting for waist circumference, insulin resistance, triglyceride, HDL, adiponectin, mtDNA & TBARS. mtDNA depletion showed significant association with T2DM after adjusting for waist circumference and adiponectin but lost its significance when further adjusted for telomere length, TBARS and insulin resistance. Our study emphasizes the clustering of accelerated aging features viz., shortened telomeres, decreased mtDNA content, hypoadiponectinemia, low HDL, and increased oxidative stress in Asian Indian type 2 diabetes patients.
Collapse
Affiliation(s)
- Finny Monickaraj
- Department of Cell and Molecular Biology, Madras Diabetes Research Foundation and Dr. Mohan's Diabetes Specialities Centre, WHO Collaborating Centre for Non-Communicable Diseases Prevention and Control, IDF Centre of Education, Gopalapuram, Chennai 600 086, Tamilnadu, India
| | | | | | | | | | | | | | | |
Collapse
|
36
|
55-week treatment of mice with the unani and ayurvedic medicine pomegranate flower ameliorates ageing-associated insulin resistance and skin abnormalities. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2011; 2012:350125. [PMID: 22253646 PMCID: PMC3255288 DOI: 10.1155/2012/350125] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2011] [Revised: 09/22/2011] [Accepted: 09/29/2011] [Indexed: 11/18/2022]
Abstract
PPARs play a pivotal role in regulating lipid and glucose homeostasis and are involved in diverse biological activities in skin. Pomegranate flower (PGF, an antidiabetic therapy in Unani and Ayurvedic medicines) has been previously demonstrated to activate both PPARalpha/gamma. Here, we found that treatment of mice with the diet containing PGF powder over 55 weeks attenuated ageing-induced abnormal increases in the homeostasis model assessment of insulin resistance, glucose concentrations during oral glucose tolerance test, and adipose insulin resistance index. The diet tended to decrease the excessive peri-ovary fat mass. It, however, increased the thinned subcutaneous fat thickness. In addition, the diet restored decreases in skin water content, epidermis thickness, and collagen density in corium. Thus, our results demonstrate that long-term treatment with the Unani and Ayurvedic therapy ameliorates ageing-induced insulin resistance, which is associated with reversal of ageing-induced fat redistribution. Further, PGF attenuates ageing-mediated undesirable skin abnormalities.
Collapse
|
37
|
Redox proteomics and drug development. J Proteomics 2011; 74:2575-95. [DOI: 10.1016/j.jprot.2011.01.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Revised: 12/22/2010] [Accepted: 01/09/2011] [Indexed: 01/06/2023]
|
38
|
Thyagarajan-Sahu A, Lane B, Sliva D. ReishiMax, mushroom based dietary supplement, inhibits adipocyte differentiation, stimulates glucose uptake and activates AMPK. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2011; 11:74. [PMID: 21929808 PMCID: PMC3224355 DOI: 10.1186/1472-6882-11-74] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Accepted: 09/19/2011] [Indexed: 11/23/2022]
Abstract
Background Obesity is a health hazard which is closely associated with various complications including insulin resistance, hypertension, dyslipidemia, atherosclerosis, type 2 diabetes and cancer. In spite of numerous preclinical and clinical interventions, the prevalence of obesity and its related disorders are on the rise demanding an urgent need for exploring novel therapeutic agents that can regulate adipogenesis. In the present study, we evaluated whether a dietary supplement ReishiMax (RM), containing triterpenes and polysaccharides extracted from medicinal mushroom Ganoderma lucidum, affects adipocyte differentiation and glucose uptake in 3T3-L1 cells. Methods 3T3-L1 pre-adipocytes were differentiated into adipocytes and treated with RM (0-300 μg/ml). Adipocyte differentiation/lipid uptake was evaluated by oil red O staining and triglyceride and glycerol concentrations were determined. Gene expression was evaluated by semi-quantitative RT-PCR and Western blot analysis. Glucose uptake was determined with [3H]-glucose. Results RM inhibited adipocyte differentiation through the suppresion of expression of adipogenic transcription factors peroxisome proliferator-activated receptor-γ (PPAR-γ), sterol regulatory element binding element protein-1c (SREBP-1c) and CCAAT/enhancer binding protein-α (C/EBP-α). RM also suppressed expression of enzymes and proteins responsible for lipid synthesis, transport and storage: fatty acid synthase (FAS), acyl-CoA synthetase-1 (ACS1), fatty acid binding protein-4 (FABP4), fatty acid transport protein-1 (FATP1) and perilipin. RM induced AMP-activated protein kinase (AMPK) and increased glucose uptake by adipocytes. Conclusion Our study suggests that RM can control adipocyte differentiation and glucose uptake. The health benefits of ReishiMax warrant further clinical studies.
Collapse
|
39
|
Shimizu T, Shirasawa T. [iomarkers for aging]. Nihon Yakurigaku Zasshi 2011; 138:60-63. [PMID: 21828939 DOI: 10.1254/fpj.138.60] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
|
40
|
Wehling M, Groth H. Challenges of Longevity in Developed Countries: Vascular Prevention of Dementia as an Immediate Clue to Tackle an Upcoming Medical, Social and Economic Stretch. NEURODEGENER DIS 2011; 8:275-82. [DOI: 10.1159/000322791] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Accepted: 11/15/2010] [Indexed: 01/24/2023] Open
|
41
|
Abstract
Women
live longer than men. Yet, it is believed that men do not age faster than
women but simply are weaker at every age. In contrast, I discuss that men
age faster. From evolutionary perspective, high accidental death rate in
young males is compatible with fast aging. Mechanistically, hyper-activated
mTOR (Target of Rapamycin) may render young males robust at the cost of
accelerated aging. But if women age slower, why then is it women who have
menopause? Some believe that menopause is programmed and purposeful
(grandmother theory). In contrast, I discuss how menopause is not
programmed but rather is an aimless continuation of the same program that
initially starts reproduction at puberty. This quasi-program causes
over-activation of female reproductive system, which is very vulnerable to
over-activation. Mechanisms of aging and menopause are discussed.
Collapse
|
42
|
Gattinoni L, Klebanoff CA, Restifo NP. Pharmacologic induction of CD8+ T cell memory: better living through chemistry. Sci Transl Med 2010; 1:11ps12. [PMID: 20371454 DOI: 10.1126/scitranslmed.3000302] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The generation of a robust population of memory T cells is critical for effective vaccine and cell-based therapies to prevent and treat infectious diseases and cancer. A series of recent papers have established a new, cell-intrinsic approach in which small molecules target key metabolic and developmental pathways to enhance the formation and maintenance of highly functional CD8(+) memory T cells. These findings raise the exciting new possibility of using small molecules, many of which are already approved for human use, for the pharmacologic induction of immunologic memory.
Collapse
Affiliation(s)
- Luca Gattinoni
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | | | | |
Collapse
|
43
|
Pérez de Heredia F, Sánchez J, Priego T, Larqué E, Portillo MDP, Palou A, Zamora S, Garaulet M. Adiponectin is associated with serum and adipose tissue fatty acid composition in rats. J Endocrinol Invest 2009; 32:659-65. [PMID: 19474526 DOI: 10.1007/bf03345737] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The objective of the present work is to analyse the relationships between changes in adiponectin and fatty acid composition in serum and adipose tissue in rats. Samples from serum and different adipose depots (periovarian, mesenteric and subcutaneous) were obtained from ageing rats (14- and 20-month-old) to determine fatty acid composition (gasliquid chromatography). In serum, insulin (radioimmunoassay) and adiponectin levels (enzyme-linked immunosorbent assay) were also measured, while adiponectin gene expression was analysed (real time-qPCR) in all fat depots. There were significant age-related reductions in adipose tissue saturated (SFA) and trans fatty acids and increases in monounsaturated fatty acids in parallel with diminished adiponectin expression in periovarian and mesenteric adipose tissue (p<0.05). Age-independent negative correlations were found between adiponectin gene expression in mesenteric adipose tissue and C12:0, C14:0 and C18:2 trans fatty acids (p<0.05). There was a positive association between serum adiponectin and adipose tissue oleic acid, while palmitoleic acid was negatively associated with adiponectin expression and positively correlated with insulin concentration. For the first time, positive relationships are reported between the proportion of n-6 polyunsaturated fatty acids (PUFA) in adipose tissue and adiponectin concentration and expression. In summary, adiponectin expression and serum levels are associated with fatty acid composition, with SFA, trans and palmitoleic fatty acids appearing as negative markers for adiponectin, and oleic acid and n-6 PUFA as positive ones. In addition, most associations were found in the visceral depots, highlighting the importance of visceral fat in the metabolic status.
Collapse
Affiliation(s)
- F Pérez de Heredia
- Dept. Physiology, University of Murcia, Paseo Rector Sabater s/n, Campus de Espinardo, 30100 Murcia, Spain
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Blagosklonny MV. Validation of anti-aging drugs by treating age-related diseases. Aging (Albany NY) 2009; 1:281-8. [PMID: 20157517 PMCID: PMC2806014 DOI: 10.18632/aging.100034] [Citation(s) in RCA: 120] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2008] [Accepted: 03/28/2009] [Indexed: 01/18/2023]
Abstract
Humans die from
age-related diseases, which are deadly manifestations of the aging process.
In order to extend life span, an anti-aging drug must delay age-related
diseases. All together age-related diseases are the best biomarker
of aging. Once a drug is used for treatment of any one chronic disease, its
effect against other diseases (atherosclerosis, cancer, prostate
enlargement, osteoporosis, insulin resistance, Alzheimer's and Parkinson's
diseases, age-related macular degeneration) may be evaluated in the same
group of patients. If the group is large, then the anti-aging effect could
be validated in a couple of years. Startlingly, retrospective analysis of
clinical and preclinical data reveals four potential anti-aging modalities.
Collapse
|
45
|
Ksiazek K, Mikula-Pietrasik J, Korybalska K, Dworacki G, Jörres A, Witowski J. Senescent peritoneal mesothelial cells promote ovarian cancer cell adhesion: the role of oxidative stress-induced fibronectin. THE AMERICAN JOURNAL OF PATHOLOGY 2009; 174:1230-40. [PMID: 19246646 DOI: 10.2353/ajpath.2009.080613] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Adhesion of ovarian cancer cells to the peritoneal mesothelium is a key step in the malignant progression of the disease. In an in vitro study, we showed that the adherence of ovarian cancer cells (of the OVCAR-3, SKOV-3, and A2780 cell lines) to senescent human omentum-derived peritoneal mesothelial cells (HOMCs) was greater than to early passage cells. The process was mediated primarily by the increased interaction of the alpha5beta1 integrin on cancer cells with HOMC-associated fibronectin (FN). In comparison with early passage HOMCs, senescent cells exhibited increased FN mRNA expression levels and produced significantly more FN. To assess the effect of senescence-associated oxidative stress on FN release, HOMCs were rendered senescent by exposure to an oxidant, tert-butyl hydroperoxide. Treatment with tert-butyl hydroperoxide resulted in a significant increase in HOMC FN mRNA and protein expression levels. The effect of oxidative stress on FN synthesis was found to be mediated by transforming growth factor-beta1, whose signaling pathway was controlled at upstream and downstream levels by p38 MAPK. The activity of p38 MAPK increased markedly in senescent HOMCs. Treatment of HOMCs with antioxidants significantly attenuated senescence-associated increases in p38 MAPK activity, production of both transforming growth factor-beta1 and FN, and ovarian cancer cell adhesion. These data indicate that oxidative stress that accompanies senescence may increase FN production by HOMCs and thus facilitate binding and dissemination of ovarian cancer cells.
Collapse
Affiliation(s)
- Krzysztof Ksiazek
- Department of Pathophysiology, Poznan University of Medical Sciences, Swiecickiego 6, 60-781 Poznan, Poland
| | | | | | | | | | | |
Collapse
|
46
|
Feng X, Chen Y, Zhao J, Tang C, Jiang Z, Geng B. Hydrogen sulfide from adipose tissue is a novel insulin resistance regulator. Biochem Biophys Res Commun 2009; 380:153-9. [DOI: 10.1016/j.bbrc.2009.01.059] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Accepted: 01/10/2009] [Indexed: 10/21/2022]
|
47
|
Singh SP, Niemczyk M, Zimniak L, Zimniak P. Fat accumulation in Caenorhabditis elegans triggered by the electrophilic lipid peroxidation product 4-hydroxynonenal (4-HNE). Aging (Albany NY) 2008; 1:68-80. [PMID: 20157589 PMCID: PMC2815766 DOI: 10.18632/aging.100005] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2008] [Accepted: 12/12/2008] [Indexed: 04/29/2023]
Abstract
Deposition and mobilization of fat in an organism are tightly controlled by multiple levels of endocrine and neuroendocrine regulation. Because these hormonal mechanisms ultimately act by affecting biochemical reactions of fat synthesis or utilization, obesity could be also modulated by altering directly the underlying lipid biochemistry. We have previously shown that genetically modified mice with an elevated level of the lipid peroxidation product 4-HNE become obese. We now demonstrate that the process is phylogenetically conserved and thus likely to be universal. In the nematode C. elegans, disruption of either conjugation or oxidation of 4-HNE leads to fat accumulation, whereas augmentation of 4-HNE conjugation results in a lean phenotype. Moreover, direct treatment of C. elegans with synthetic 4-HNE causes increased lipid storage, directly demonstrating a causative role of 4-HNE. The postulated mechanism, which involves modulation of acetyl-CoA carboxylase activity, could contribute to the triggering and maintenance of the obese phenotype on a purely metabolic level.
Collapse
Affiliation(s)
- Sharda P. Singh
- Department of Pharmacology and
Toxicology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Maciej Niemczyk
- Department of Pharmacology and
Toxicology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Ludwika Zimniak
- Department of Pharmacology and
Toxicology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Piotr Zimniak
- Department of Pharmacology and
Toxicology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
- Central Arkansas Veterans
Healthcare System, Little Rock, AR 72205, USA
| |
Collapse
|
48
|
Abstract
Maintenance of body temperature is achieved partly by modulating lipolysis by a network of complex regulatory mechanisms. Lipolysis is an integral part of the glycerolipid/free fatty acid (GL/FFA) cycle, which is the focus of this review, and we discuss the significance of this pathway in the regulation of many physiological processes besides thermogenesis. GL/FFA cycle is referred to as a "futile" cycle because it involves continuous formation and hydrolysis of GL with the release of heat, at the expense of ATP. However, we present evidence underscoring the "vital" cellular signaling roles of the GL/FFA cycle for many biological processes. Probably because of its importance in many cellular functions, GL/FFA cycling is under stringent control and is organized as several composite short substrate/product cycles where forward and backward reactions are catalyzed by separate enzymes. We believe that the renaissance of the GL/FFA cycle is timely, considering the emerging view that many of the neutral lipids are in fact key signaling molecules whose production is closely linked to GL/FFA cycling processes. The evidence supporting the view that alterations in GL/FFA cycling are involved in the pathogenesis of "fatal" conditions such as obesity, type 2 diabetes, and cancer is discussed. We also review the different enzymatic and transport steps that encompass the GL/FFA cycle leading to the generation of several metabolic signals possibly implicated in the regulation of biological processes ranging from energy homeostasis, insulin secretion and appetite control to aging and longevity. Finally, we present a perspective of the possible therapeutic implications of targeting this cycling.
Collapse
Affiliation(s)
- Marc Prentki
- Departments of Nutrition and Biochemistry, University of Montreal, Montreal Diabetes Research Center, CR-CHUM, Montreal, Quebec, Canada H1W 4A4.
| | | |
Collapse
|
49
|
Pérez-de-Heredia F, Sánchez J, Priego T, Nicolás F, Portillo MDP, Palou A, Zamora S, Garaulet M. Adiponectin is involved in the protective effect of DHEA against metabolic risk in aged rats. Steroids 2008; 73:1128-36. [PMID: 18534650 DOI: 10.1016/j.steroids.2008.04.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2008] [Revised: 03/25/2008] [Accepted: 04/22/2008] [Indexed: 01/19/2023]
Abstract
The aim of the present work was to analyze the effect of dehydroepiandrosterone (DHEA) on several metabolic risk factors, including cardiovascular health and insulin resistance, in aged rats submitted to a high-fat diet. For that, weaned rats were fed on a high-fat diet until 20 months of age. In the last 13 weeks of life, a group (n=11) received the diet supplemented with DHEA (0.5%, w/w), serving the rest (n=10) as controls. Body weight, body fat, serum lipids (triglycerides, total cholesterol and non-esterified fatty acids (NEFA)), HOMA index, n-6/n-3 polyunsaturated fatty acid (PUFA) ratios, serum adiponectin, leptin, resistin and TNF-alpha, as well as adiponectin expression in adipose tissue, were measured. A stepwise discriminant test was used to analyze these variables, and an index of overall metabolic risk was generated from them. DHEA treatment resulted in a significantly lower overall metabolic risk index, as generated by the discriminant test (P<0.01). The DHEA group had lower body fat and n-6/n-3 polyunsaturated fatty acid (PUFA) ratios than the control group (P<0.01), and the same trends were observed for serum cholesterol, triglycerides and HOMA index; in contrast, adiponectin expression in adipose tissue increased in DHEA-treated rats (P<0.05). The discriminant analysis revealed that adiponectin, both from serum and adipose tissue, was the most influencing factor, followed by n-6/n-3 ratios in adipose tissue, and by body fat. Our results then suggest that adiponectin is involved in the protective effect of DHEA against metabolic risk demonstrated in the present work.
Collapse
Affiliation(s)
- Fátima Pérez-de-Heredia
- Department of Physiology, University of Murcia, Paseo Rector Sabater s/n, Campus de Espinardo, 30100 Murcia, Spain
| | | | | | | | | | | | | | | |
Collapse
|
50
|
The signaling hubs at the crossroad of longevity and age-related disease networks. Int J Biochem Cell Biol 2008; 41:516-20. [PMID: 18793745 DOI: 10.1016/j.biocel.2008.08.026] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2008] [Revised: 08/07/2008] [Accepted: 08/13/2008] [Indexed: 12/20/2022]
Abstract
The established human age-related disease proteins (ARDPs) and longevity-associated proteins (LAPs) together with their first-order interacting partners form scale-free networks which significantly overlap. About half of the common proteins are involved in signal transduction. These proteins are strongly interconnected and in turn form a common signaling network which comprises over 40% of all hubs (proteins with multiple interactions) in the human interactome. Along with the insulin pathway, the common signaling network is remarkably enriched with the focal adhesion and adherens junction proteins whose relation to the control of lifespan is yet to be fully addressed. The examples of such candidate proteins include several hubs, focal adhesion kinase PTK2 and the extracellular proteins fibronectin FN1, paxillin PXN, and vinculin VCL. The results of the network-based analysis highlight the potential importance of these pathways, especially hubs, in linking the human longevity and age-related diseases.
Collapse
|