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Ahn J, Jeong H, Seo BG, Park KS, Hwangbo C, Kim HG, Koh JS, Kim J. Genome-wide association study for vascular aging highlights pathways shared with cardiovascular traits in Koreans. Front Cardiovasc Med 2022; 9:1058308. [PMID: 36620623 PMCID: PMC9813851 DOI: 10.3389/fcvm.2022.1058308] [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: 09/30/2022] [Accepted: 12/07/2022] [Indexed: 12/24/2022] Open
Abstract
Vascular aging plays a pivotal role in the morbidity and mortality of older people. Reactive hyperemia index (RHI) detected by pulse amplitude tonometry (PAT) is a non-invasive measure of vascular endothelial function and aging-induced pathogenesis of both microvascular and macrovascular diseases. We conducted a genome-wide association study (GWAS) to comprehensively identify germline genetic variants associated with vascular aging in a Korean population, which revealed 60 suggestive genes underlying angiogenesis, inflammatory response in blood vessels, and cardiovascular diseases. Subsequently, we show that putative protective alleles were significantly enriched in an independent population with decelerated vascular aging phenotypes. Finally, we show the differential mRNA expression levels of putative causal genes in aging human primary endothelial cells via quantitative real-time polymerase chain reaction (PCR). These results highlight the potential contribution of genetic variants in the etiology of vascular aging and may suggest the link between vascular aging and cardiovascular traits.
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Affiliation(s)
- JaeKyoung Ahn
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju, Republic of Korea,Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Hankyeol Jeong
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju, Republic of Korea,Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Bo-Gyeong Seo
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju, Republic of Korea,Division of Life Science, College of National Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Ki-Soo Park
- Department of Preventive Medicine, College of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, Republic of Korea,Center for Farmer’s Safety and Health, Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Cheol Hwangbo
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju, Republic of Korea,Division of Life Science, College of National Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Han-Gyul Kim
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Jin-Sin Koh
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Gyeongsang National University Hospital, Jinju, Republic of Korea,*Correspondence: Jin-Sin Koh,
| | - Jaemin Kim
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju, Republic of Korea,Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju, Republic of Korea,Jaemin Kim,
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2
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Lee H, Kim SY, Lee SW, Kwak S, Li H, Piao R, Park HY, Choi S, Jeong TS. Amentoflavone-Enriched Selaginella rossii Protects against Ultraviolet- and Oxidative Stress-Induced Aging in Skin Cells. LIFE (BASEL, SWITZERLAND) 2022; 12:life12122106. [PMID: 36556471 PMCID: PMC9787533 DOI: 10.3390/life12122106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/09/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
Abstract
Selaginellaceae plants are used in cosmetics to limit skin aging. This study is the first to investigate the anti-aging effects of Selaginella rossii (SR) on ultraviolet B (UVB)- and oxidative stress-induced skin cells. The 95% ethanol extract of Selaginella rossii (SR95E) contained much higher amounts of amentoflavone (AMF), an active compound, than other Selaginellaceae plants and was more effective in inhibiting matrix metalloproteinase (MMP)-1 expression in CCD-986sk fibroblasts. SR95E significantly decreased UVB-induced MMP-1, MMP-2, MMP-3 and MMP-9 expression and enhanced procollagen type I C-peptide content and mRNA expression of collagen type I alpha (COL1A)1 and COL1A2 in CCD-986sk fibroblasts. In HaCaT keratinocytes, SR95E treatment also dose-dependently decreased UVB-induced MMP-1 concentration and MMP-1, MMP-2, MMP-3 and MMP-9 mRNA expression. Moreover, SR95E treatment markedly inhibited UVB-induced c-Jun N-terminal kinase and p38 mitogen-activated protein kinase signaling and nuclear factor kappa-B signaling in HaCaT cells. Furthermore, SR95E and AMF markedly regulated the 2,2'-azobis(2-amidinopropane) dihydrochloride (AAPH)-induced expression of cellular senescence-related markers, including p16, p21 and LMNB1, in HaCaT cells. Overall, this study indicates that SR may have potential as a functional material on preventing UVB- and AAPH-induced skin aging and wrinkles.
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Affiliation(s)
- Hwa Lee
- Microbiome Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea
| | - Soo-Yong Kim
- International Biological Material Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea
| | - Sang Woo Lee
- International Biological Material Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea
| | - Sehan Kwak
- Microbiome Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea
- Department of Medical Biotechnology, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Hulin Li
- Department of Agronomy, Yanbian University Agriculture College, Yanji 133000, China
| | - Renzhe Piao
- Department of Agronomy, Yanbian University Agriculture College, Yanji 133000, China
| | - Ho-Yong Park
- Microbiome Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea
| | - Sangho Choi
- International Biological Material Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea
- Correspondence: (S.C.); (T.-S.J.); Tel.: +82-42-879-8340 (S.C.); +82-42-860-4558 (T.-S.J.); Fax: +82-42-861-8349 (S.C.); +82-42-861-2675 (T.-S.J.)
| | - Tae-Sook Jeong
- Microbiome Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea
- Correspondence: (S.C.); (T.-S.J.); Tel.: +82-42-879-8340 (S.C.); +82-42-860-4558 (T.-S.J.); Fax: +82-42-861-8349 (S.C.); +82-42-861-2675 (T.-S.J.)
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3
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Vellasamy DM, Lee SJ, Goh KW, Goh BH, Tang YQ, Ming LC, Yap WH. Targeting Immune Senescence in Atherosclerosis. Int J Mol Sci 2022; 23:13059. [PMID: 36361845 PMCID: PMC9658319 DOI: 10.3390/ijms232113059] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/07/2022] [Accepted: 10/10/2022] [Indexed: 10/29/2023] Open
Abstract
Atherosclerosis is one of the main underlying causes of cardiovascular diseases (CVD). It is associated with chronic inflammation and intimal thickening as well as the involvement of multiple cell types including immune cells. The engagement of innate or adaptive immune response has either athero-protective or atherogenic properties in exacerbating or alleviating atherosclerosis. In atherosclerosis, the mechanism of action of immune cells, particularly monocytes, macrophages, dendritic cells, and B- and T-lymphocytes have been discussed. Immuno-senescence is associated with aging, viral infections, genetic predispositions, and hyperlipidemia, which contribute to atherosclerosis. Immune senescent cells secrete SASP that delays or accelerates atherosclerosis plaque growth and associated pathologies such as aneurysms and coronary artery disease. Senescent cells undergo cell cycle arrest, morphological changes, and phenotypic changes in terms of their abundances and secretome profile including cytokines, chemokines, matrix metalloproteases (MMPs) and Toll-like receptors (TLRs) expressions. The senescence markers are used in therapeutics and currently, senolytics represent one of the emerging treatments where specific targets and clearance of senescent cells are being considered as therapy targets for the prevention or treatment of atherosclerosis.
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Affiliation(s)
- Danusha Michelle Vellasamy
- School of Biosciences, Faculty of Medical and Health Sciences, Taylor’s University, Subang Jaya 47500, Malaysia
| | - Sin-Jye Lee
- School of Biosciences, Faculty of Medical and Health Sciences, Taylor’s University, Subang Jaya 47500, Malaysia
| | - Khang Wen Goh
- Faculty of Data Science and Information Technology, INTI International University, Nilai 71800, Malaysia
| | - Bey-Hing Goh
- Biofunctional Molecule Exploratory (BMEX) Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway 47500, Malaysia
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Yin-Quan Tang
- School of Biosciences, Faculty of Medical and Health Sciences, Taylor’s University, Subang Jaya 47500, Malaysia
- Centre for Drug Discovery and Molecular Pharmacology, Faculty of Medical and Health Sciences, Taylor’s University, Subang Jaya 47500, Malaysia
| | - Long Chiau Ming
- PAP Rashidah Sa’adatul Bolkiah Institute of Health Sciences, Universiti Brunei Darussalam, Gadong BE1410, Brunei
| | - Wei Hsum Yap
- School of Biosciences, Faculty of Medical and Health Sciences, Taylor’s University, Subang Jaya 47500, Malaysia
- Centre for Drug Discovery and Molecular Pharmacology, Faculty of Medical and Health Sciences, Taylor’s University, Subang Jaya 47500, Malaysia
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4
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Sun A, Li J, Kong W, Jiang X. Silencing of immunoglobulin superfamily containing leucine-rich repeat inhibits gastric cancer cell growth and metastasis by regulating epithelial-mesenchymal transition. Bioengineered 2022; 13:13544-13554. [PMID: 35653801 PMCID: PMC9276042 DOI: 10.1080/21655979.2022.2079303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study aims to investigate the immunoglobulin superfamily containing leucine-rich repeat (ISLR) expression in gastric cancer (GC) and ISLR’s underlying mechanisms regulation of GC progression. Through The Cancer Genome Atlas (TCGA) cohort datasets, we analyzed the ISLR expression in GC tumor tissues and normal tissues. ISLR expression in GC tissues and cells was determined using quantitative real-time polymerase chain reaction. Cell viability, proliferation, migration, and invasion assays were performed in GC cells transfected with sh-ISLR, ISLR plasmids, or controls. TCGA results showed that ISLR expression was higher in GC tumor tissues compared to normal tissues, and its expression levels were related to lymph node metastasis, tumor size, and clinical stage. ISLR was highly expressed in tumor cells. ISLR knockdown suppressed cell viability, proliferation, migration, and invasion in HGC-27 cells, whereas ISLR overexpression led to opposite effects in AGS cells. Gene Set Enrichment Analysis showed that ISLR could activate the epithelial–mesenchymal transition (EMT) signaling pathway. Silencing of ISLR suppressed EMT in HGC-27 cells and overexpression of ISLR promoted EMT in AGS cells. ISLR was overexpressed in both GC cell lines and tumor tissues, and our study first showed that silencing of ISLR inhibited GC cell growth and metastasis by reversing EMT.
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Affiliation(s)
- Aitao Sun
- Department of Gastroenterology, Yantaishan Hospital, Yantai, Shandong, P.R. China
| | - JinBo Li
- Department of General Surgery, Gaotang County People's Hospital, Liaocheng, Shandong, P.R. China
| | - Weijing Kong
- Department of Cardiology, Qingdao Eighth People's Hospital, Qingdao, Shandong, P.R. China
| | - Xiaodong Jiang
- Department of Gastrointestinal Surgery, Laizhou People's Hospital, Yantai, Shandong, P.R. China
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Picca A, Guerra F, Calvani R, Romano R, Coelho-Junior HJ, Damiano FP, Bucci C, Marzetti E. Circulating Mitochondrial DNA and Inter-Organelle Contact Sites in Aging and Associated Conditions. Cells 2022; 11:cells11040675. [PMID: 35203322 PMCID: PMC8870554 DOI: 10.3390/cells11040675] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/11/2022] [Accepted: 02/14/2022] [Indexed: 02/07/2023] Open
Abstract
Mitochondria are primarily involved in cell bioenergetics, regulation of redox homeostasis, and cell death/survival signaling. An immunostimulatory property of mitochondria has also been recognized which is deployed through the extracellular release of entire or portioned organelle and/or mitochondrial DNA (mtDNA) unloading. Dynamic homo- and heterotypic interactions involving mitochondria have been described. Each type of connection has functional implications that eventually optimize mitochondrial activity according to the bioenergetic demands of a specific cell/tissue. Inter-organelle communications may also serve as molecular platforms for the extracellular release of mitochondrial components and subsequent ignition of systemic inflammation. Age-related chronic inflammation (inflamm-aging) has been associated with mitochondrial dysfunction and increased extracellular release of mitochondrial components—in particular, cell-free mtDNA. The close relationship between mitochondrial dysfunction and cellular senescence further supports the central role of mitochondria in the aging process and its related conditions. Here, we provide an overview of (1) the mitochondrial genetic system and the potential routes for generating and releasing mtDNA intermediates; (2) the pro-inflammatory pathways elicited by circulating mtDNA; (3) the participation of inter-organelle contacts to mtDNA homeostasis; and (4) the link of these processes with senescence and age-associated conditions.
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Affiliation(s)
- Anna Picca
- Fondazione Policlinico Universitario “Agostino Gemelli” IRCCS, 00168 Rome, Italy; (A.P.); (F.P.D.); (E.M.)
| | - Flora Guerra
- Department of Biological and Environmental Sciences and Technologies, Università del Salento, 73100 Lecce, Italy; (F.G.); (R.R.); (C.B.)
| | - Riccardo Calvani
- Fondazione Policlinico Universitario “Agostino Gemelli” IRCCS, 00168 Rome, Italy; (A.P.); (F.P.D.); (E.M.)
- Correspondence: ; Tel.: +39-06-3015-5559; Fax: +39-06-3051-911
| | - Roberta Romano
- Department of Biological and Environmental Sciences and Technologies, Università del Salento, 73100 Lecce, Italy; (F.G.); (R.R.); (C.B.)
| | - Hélio José Coelho-Junior
- Department of Geriatrics and Orthopedics, Università Cattolica del Sacro Cuore, 00168 Rome, Italy;
| | - Francesco P. Damiano
- Fondazione Policlinico Universitario “Agostino Gemelli” IRCCS, 00168 Rome, Italy; (A.P.); (F.P.D.); (E.M.)
| | - Cecilia Bucci
- Department of Biological and Environmental Sciences and Technologies, Università del Salento, 73100 Lecce, Italy; (F.G.); (R.R.); (C.B.)
| | - Emanuele Marzetti
- Fondazione Policlinico Universitario “Agostino Gemelli” IRCCS, 00168 Rome, Italy; (A.P.); (F.P.D.); (E.M.)
- Department of Geriatrics and Orthopedics, Università Cattolica del Sacro Cuore, 00168 Rome, Italy;
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6
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Zhang P, Li Z, Yang G. Silencing of ISLR inhibits tumour progression and glycolysis by inactivating the IL‑6/JAK/STAT3 pathway in non‑small cell lung cancer. Int J Mol Med 2021; 48:222. [PMID: 34713300 PMCID: PMC8559699 DOI: 10.3892/ijmm.2021.5055] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 09/15/2021] [Indexed: 12/13/2022] Open
Abstract
Lung cancer is the second most frequent cancer type in both men and women, and it is considered to be one of the major causes of cancer-related mortality worldwide. However, few biomarkers are currently available for the diagnosis of lung cancer. The aim of the present study was to investigate the function of the immunoglobulin superfamily containing leucine-rich repeat (ISLR) gene in non-small cell lung cancer (NSCLC) cells, and to elucidate the underlying molecular mechanism of its action. The current study analysed ISLR expression in NSCLC tumour and normal tissues using The Cancer Genome Atlas cohort datasets. ISLR expression in NSCLC cell lines was determined using reverse transcription-quantitative PCR. Cell Counting Kit-8, soft agar colony formation, wound healing, Transwell, flow cytometry and glycolysis assays were performed to determine the effects of ISLR silencing or overexpression on cells. The expression levels of the genes involved in epithelial-mesenchymal transition (EMT), apoptosis and glycolysis were evaluated via western blotting. Transfected cells were exposed to the pathway activator, IL-6, to validate the regulatory pathway. ISLR was overexpressed in NSCLC tissues and cell lines. Overall, patients with high ISLR expression had lower survival rates. In addition, small interfering RNA-ISLR inhibited the proliferation, EMT, migration, invasion and glycolysis of NSCLC cells, and promoted their apoptosis. ISLR overexpression had the opposite effect on tumour progression and glycolysis in NSCLC cells. Gene set enrichment analysis and western blotting results indicated that the IL-6/Janus kinase (JAK)/STAT3 pathway was enriched in ISLR-related NSCLC. Knockdown of ISLR inhibited IL-6-induced proliferation, invasion, migration and glycolysis in human NSCLC cells. In summary, ISLR silencing can inhibit tumour progression and glycolysis in NSCLC cells by activating the IL-6/JAK/STAT3 signalling pathway, which is a potential molecular target for NSCLC diagnosis and treatment.
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Affiliation(s)
- Peng Zhang
- Department of Pulmonary and Critical Care Medicine, Shandong Second Provincial General Hospital, Ji'nan, Shandong 250022, P.R. China
| | - Zhen Li
- Department of Pulmonary and Critical Care Medicine, Shandong Second Provincial General Hospital, Ji'nan, Shandong 250022, P.R. China
| | - Guangming Yang
- Department of Tumor Radiotherapy, Shandong Second Provincial General Hospital, Ji'nan, Shandong 250022, P.R. China
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Zingg JM, Vlad A, Ricciarelli R. Oxidized LDLs as Signaling Molecules. Antioxidants (Basel) 2021; 10:antiox10081184. [PMID: 34439432 PMCID: PMC8389018 DOI: 10.3390/antiox10081184] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/16/2021] [Accepted: 07/19/2021] [Indexed: 12/14/2022] Open
Abstract
Levels of oxidized low-density lipoproteins (oxLDLs) are usually low in vivo but can increase whenever the balance between formation and scavenging of free radicals is impaired. Under normal conditions, uptake and degradation represent the physiological cellular response to oxLDL exposure. The uptake of oxLDLs is mediated by cell surface scavenger receptors that may also act as signaling molecules. Under conditions of atherosclerosis, monocytes/macrophages and vascular smooth muscle cells highly exposed to oxLDLs tend to convert to foam cells due to the intracellular accumulation of lipids. Moreover, the atherogenic process is accelerated by the increased expression of the scavenger receptors CD36, SR-BI, LOX-1, and SRA in response to high levels of oxLDL and oxidized lipids. In some respects, the effects of oxLDLs, involving cell proliferation, inflammation, apoptosis, adhesion, migration, senescence, and gene expression, can be seen as an adaptive response to the rise of free radicals in the vascular system. Unlike highly reactive radicals, circulating oxLDLs may signal to cells at more distant sites and possibly trigger a systemic antioxidant defense, thus elevating the role of oxLDLs to that of signaling molecules with physiological relevance.
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Affiliation(s)
- Jean-Marc Zingg
- Miller School of Medicine, University of Miami, Miami, FL 33136, USA
- Correspondence: (J.-M.Z.); (R.R.); Tel.: +1-(305)-2433531 (J.-M.Z.); +39-010-3538831 (R.R.)
| | - Adelina Vlad
- Physiology Department, “Carol Davila” UMPh, 020021 Bucharest, Romania;
| | - Roberta Ricciarelli
- Department of Experimental Medicine, University of Genoa, 16132 Genoa, Italy
- IRCCS Ospedale Policlinico San Martino, 16132 Genoa, Italy
- Correspondence: (J.-M.Z.); (R.R.); Tel.: +1-(305)-2433531 (J.-M.Z.); +39-010-3538831 (R.R.)
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8
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Dendranthema zawadskii var. lucidum (Nakai) J.H. Park Extract Inhibits Cellular Senescence in Human Dermal Fibroblasts and Aging-Related Inflammation in Rats. Processes (Basel) 2021. [DOI: 10.3390/pr9050801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Senescence is the phenomenon by which physiological functions of organisms degenerate with time. Cellular senescence is marked by an inhibition of cell cycle progression. Beta-galactosidase accumulates in the lysosomes of aged cells. In this study, human dermal fibroblast cells (HDFs) were treated with 0.5 μM doxorubicin for 4 h to induce cellular senescence. Senescence-associated beta-galactosidase (SA-β-gal) activity was then measured 72 h after treatment with aerial parts of Dendranthema zawadskii var. lucidum (Nakai) J.H. Park (DZ) extract. Treatment with DZ extract significantly decreased SA-β-gal activity in a dose-dependent manner in HDFs. Additionally, DZ extract treatment reduced age-related oxidative stress and inflammation in the aortas of aged rats. The reactive oxygen species (ROS) levels in aortas of aged control rats were higher than those in young rats. However, DZ extract-fed aged rats showed significantly lower ROS levels than the aged control rats. When the aged rats were treated with DZ extract at either 0.2 or 1.0 mg∙kg−1∙day−1, NF-κB levels in aorta tissue decreased significantly compared to those in aorta tissue of the aged control rats without DZ treatment. In addition, DZ extract-fed aged rat aortas showed significant reductions in expression of iNOS and COX-2 induced by NF-κB translocation. Therefore, these results suggest that DZ effectively inhibited senescence-related NF-κB activation and inflammation. DZ extract may have a role in the prevention of the vascular inflammatory responses that occur during vascular aging.
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Ricciarelli R, Azzi A, Zingg JM. Reduction of senescence-associated beta-galactosidase activity by vitamin E in human fibroblasts depends on subjects' age and cell passage number. Biofactors 2020; 46:665-674. [PMID: 32479666 DOI: 10.1002/biof.1636] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 04/22/2020] [Indexed: 12/14/2022]
Abstract
Cell senescence is due to the permanent cell cycle arrest that occurs as a result of the inherent limited replicative capacity toward the Hayflick limit (replicative senescence), or in response to various stressors (stress-induced premature senescence, SIPS). With the acquisition of the senescence-associated secretory phenotype (SASP), cells release several molecules (cytokines, proteases, lipids), and express the senescence-associated beta-galactosidase (SA-β-Gal). Here we tested whether vitamin E affects SA-β-Gal in an in vitro model of cell ageing. Skin fibroblasts from human subjects of different age (1, 13, 29, 59, and 88 years old) were cultured until they reached replicative senescence. At different passages (Passages 2, 9, 13, and 16), these cells were treated with vitamin E for 24 hr. Vitamin E reduced SA-β-Gal in all cells at passage 16, but at earlier passage numbers it reduced SA-β-Gal only in cells isolated from the oldest subjects. Therefore, short time treatment with vitamin E decreases SA-β-Gal in cells both from young and old subjects when reaching replicative senescence; but in cells isolated from older subjects, a decrease in SA-β-Gal by vitamin E occurs also at earlier passage numbers. The possible role of downregulation of CD36 by vitamin E, a scavenger receptor essential for initiation of senescence and SASP, is discussed.
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Affiliation(s)
- Roberta Ricciarelli
- Department of Experimental Medicine, University of Genoa, Genoa, Italy
- IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Angelo Azzi
- Sackler School of Graduate Biomedical Pharmacology and Drug Development Program, Tufts University, Boston, Massachusetts, USA
| | - Jean-Marc Zingg
- Miller School of Medicine, University of Miami, Miami, Florida, USA
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10
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Li S, Zhao W, Sun M. An Analysis Regarding the Association Between the ISLR Gene and Gastric Carcinogenesis. Front Genet 2020; 11:620. [PMID: 32612640 PMCID: PMC7308588 DOI: 10.3389/fgene.2020.00620] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 05/22/2020] [Indexed: 12/11/2022] Open
Abstract
For datasets of gastric cancer collected by TCGA (The Cancer Genome Atlas) and GEO (Gene Expression Omnibus) repositories, we applied a bioinformatics approach to obtain expression data for the ISLR (immunoglobulin superfamily containing leucine-rich repeat) gene, which is highly expressed in gastric cancer tissues and closely associated with clinical prognosis. Although we did not observe an overall association of ISLR mutation, high expression or copy number variation with survival, hypomethylation of four methylated sites (assessed by the probes cg05195566, cg17258195, cg09664357, and cg07297039) of ISLR was negatively correlated with high expression levels of ISLR and was associated with poor clinical prognosis. In addition, we detected a correlation between ISLR expression and the infiltration levels of several immune cells, especially CD8+ T cells, macrophages and dendritic cells. We also identified a series of genes that were positively and negatively correlated with ISLR expression based on the TCGA-STAD, GSE13861, and GSE29272 datasets. Principal component analysis and random forest analysis were employed to further screen for six hub genes, including ISLR, COL1A2, CDH11, SPARC, COL3A1, and COL1A1, which exhibited a good ability to differentiate between tumor and normal samples. GO (Gene Ontology) and KEGG (Kyoto Encyclopedia of Genes and Genomes) pathway and gene set enrichment analysis data also suggested a potential relationship between ISLR gene expression and epithelial-mesenchymal transition (EMT). ISLR expression was negatively correlated with sensitivity to PX-12 and NSC632839. Taken together, these results show that the ISLR gene is involved in gastric carcinogenesis, and the underlying molecular mechanisms may include DNA methylation, EMT, and immune cell infiltration.
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Affiliation(s)
- Shu Li
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin, China
| | - Wei Zhao
- General Data Technology Co., Ltd., Tianjin, China
| | - Manyi Sun
- Department of Gastroenterology, Tianjin Union Medical Center, Tianjin, China
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Tiemann J, Wagner T, Vanakker OM, van Gils M, Cabrera JLB, Ibold B, Faust I, Knabbe C, Hendig D. Cellular and Molecular Biomarkers Indicate Premature Aging in Pseudoxanthoma Elasticum Patients. Aging Dis 2020; 11:536-546. [PMID: 32489700 PMCID: PMC7220280 DOI: 10.14336/ad.2019.0610] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 06/05/2019] [Indexed: 01/09/2023] Open
Abstract
The molecular processes of aging are very heterogenic and not fully understood. Studies on rare progeria syndromes, which display an accelerated progression of physiological aging, can help to get a better understanding. Pseudoxanthoma elasticum (PXE) caused by mutations in the ATP-binding cassette sub-family C member 6 (ABCC6) gene shares some molecular characteristics with such premature aging diseases. Thus, this is the first study trying to broaden the knowledge of aging processes in PXE patients. In this study, we investigated aging associated biomarkers in primary human dermal fibroblasts and sera from PXE patients compared to healthy controls. Determination of serum concentrations of the aging biomarkers eotaxin-1 (CCL11), growth differentiation factor 11 (GDF11) and insulin-like growth factor 1 (IGF1) showed no significant differences between PXE patients and healthy controls. Insulin-like growth factor binding protein 3 (IGFBP3) showed a significant increase in serum concentrations of PXE patients older than 45 years compared to the appropriate control group. Tissue specific gene expression of GDF11 and IGFBP3 were significantly decreased in fibroblasts from PXE patients compared to normal human dermal fibroblasts (NHDF). IGFBP3 protein concentration in supernatants of fibroblasts from PXE patients were decreased compared to NHDF but did not reach statistical significance due to potential gender specific variations. The minor changes in concentration of circulating aging biomarkers in sera of PXE patients and the significant aberrant tissue specific expression seen for selected factors in PXE fibroblasts, suggests a link between ABCC6 deficiency and accelerated aging processes in affected peripheral tissues of PXE patients.
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Affiliation(s)
- Janina Tiemann
- 1Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
| | - Thomas Wagner
- 1Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
| | | | - Matthias van Gils
- 2Center for Medical Genetics, Ghent University Hospital, Ghent, Belgium
| | - José-Luis Bueno Cabrera
- 3Haematology Department, Hospital Universitario Puerta de Hierro-Majadahonda, Majadahonda, Spain
| | - Bettina Ibold
- 1Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
| | - Isabel Faust
- 1Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
| | - Cornelius Knabbe
- 1Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
| | - Doris Hendig
- 1Institut für Laboratoriums- und Transfusionsmedizin, Herz- und Diabeteszentrum Nordrhein-Westfalen, Universitätsklinik der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
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12
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Veridiano JM, Theodoro TR, Negrete BR, Petri G, da Silva Pinhal MA, de Toledo OMS. Distribution of heparan sulfate correlated with the expression of heparanase-1 and matrix metalloproteinase-9 in an ovariectomized rats skin. Cell Biol Int 2020; 44:1458-1466. [PMID: 32159248 DOI: 10.1002/cbin.11339] [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: 09/03/2019] [Accepted: 03/08/2020] [Indexed: 12/02/2022]
Abstract
There are few studies on heparan sulfate (HS) in the skin, during aging, when estrogen is suppressed. The enzyme heparanase-1 (HPSE-1), has its 17β-estrogen-regulated expression in pathological conditions such as cancer and chronic inflammatory diseases. HPSE-1 is correlated with the matrix metalloproteinase-9 (MMP-9), an endopeptidase that also undergoes estrogen action. We investigated the distribution of HS, expression HPSE-1 and MMP-9 in the skin of adult rats at different ages and in the age-matched ovariectomized rats to evaluate the influence of low estrogen on the distribution of HS. Thirty female Wistar rats were used. Rats underwent to a sham surgery (ctr, n = 15) or to a bilateral ovariectomy (ovx, n = 15) and were euthanized after 45, 75, and 90 days after ovariectomy. Morphological, morphometric, biochemical, and reverse transcriptase polymerase chain reaction (RT-PCR) methodologies were used. A significant decrease (P < 0.001) in total skin thickness was observed in the ctr and ovx animals, being higher in the older animals. The thickness of the epidermis and dermis decreased; however, the proportion in the total skin remained similar comparing ctr and ovx. An increase of HS with increasing age and ovariectomy was observed. The expression of the HPSE-1 and MMP-9 enzymes decreased, being higher in old animals. A correlation between the increase of HS and the decrease of the HPSE-1 was demonstrated in both groups. Overall, these data suggested that estrogen acts in the regulation of the expression of the HPSE-1, not only in pathological states, as already established, but also in aging.
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Affiliation(s)
- Juliana M Veridiano
- Department of Morphology and Physiology, Faculdade de Medicina ABC, Av. Lauro Gomes, 2000 - Vila Sacadura Cabral, Santo André, São Paulo, 09060-870, Brazil
| | - Thérèse R Theodoro
- Department of Morphology and Physiology, Faculdade de Medicina ABC, Av. Lauro Gomes, 2000 - Vila Sacadura Cabral, Santo André, São Paulo, 09060-870, Brazil
| | - Bárbara R Negrete
- Department of Morphology and Physiology, Faculdade de Medicina ABC, Av. Lauro Gomes, 2000 - Vila Sacadura Cabral, Santo André, São Paulo, 09060-870, Brazil
| | - Giuliana Petri
- Vivarium, Faculdade de Medicina ABC, Av. Lauro Gomes, 2000 - Vila Sacadura Cabral, Santo André, São Paulo, 09060-870, Brazil
| | - Maria A da Silva Pinhal
- Department of Morphology and Physiology, Faculdade de Medicina ABC, Av. Lauro Gomes, 2000 - Vila Sacadura Cabral, Santo André, São Paulo, 09060-870, Brazil
| | - Olga Maria S de Toledo
- Department of Morphology and Physiology, Faculdade de Medicina ABC, Av. Lauro Gomes, 2000 - Vila Sacadura Cabral, Santo André, São Paulo, 09060-870, Brazil
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13
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Mrazkova B, Dzijak R, Imrichova T, Kyjacova L, Barath P, Dzubak P, Holub D, Hajduch M, Nahacka Z, Andera L, Holicek P, Vasicova P, Sapega O, Bartek J, Hodny Z. Induction, regulation and roles of neural adhesion molecule L1CAM in cellular senescence. Aging (Albany NY) 2019; 10:434-462. [PMID: 29615539 PMCID: PMC5892697 DOI: 10.18632/aging.101404] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 03/22/2018] [Indexed: 12/12/2022]
Abstract
Aging involves tissue accumulation of senescent cells (SC) whose elimination through senolytic approaches may evoke organismal rejuvenation. SC also contribute to aging-associated pathologies including cancer, hence it is imperative to better identify and target SC. Here, we aimed to identify new cell-surface proteins differentially expressed on human SC. Besides previously reported proteins enriched on SC, we identified 78 proteins enriched and 73 proteins underrepresented in replicatively senescent BJ fibroblasts, including L1CAM, whose expression is normally restricted to the neural system and kidneys. L1CAM was: 1) induced in premature forms of cellular senescence triggered chemically and by gamma-radiation, but not in Ras-induced senescence; 2) induced upon inhibition of cyclin-dependent kinases by p16INK4a; 3) induced by TGFbeta and suppressed by RAS/MAPK(Erk) signaling (the latter explaining the lack of L1CAM induction in RAS-induced senescence); and 4) induced upon downregulation of growth-associated gene ANT2, growth in low-glucose medium or inhibition of the mevalonate pathway. These data indicate that L1CAM is controlled by a number of cell growth- and metabolism-related pathways during SC development. Functionally, SC with enhanced surface L1CAM showed increased adhesion to extracellular matrix and migrated faster. Our results provide mechanistic insights into senescence of human cells, with implications for future senolytic strategies.
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Affiliation(s)
- Blanka Mrazkova
- Department of Genome Integrity, Institute of Molecular Genetics of the ASCR, Prague 14220, Czech Republic
| | - Rastislav Dzijak
- Department of Genome Integrity, Institute of Molecular Genetics of the ASCR, Prague 14220, Czech Republic
| | - Terezie Imrichova
- Department of Genome Integrity, Institute of Molecular Genetics of the ASCR, Prague 14220, Czech Republic
| | - Lenka Kyjacova
- Department of Genome Integrity, Institute of Molecular Genetics of the ASCR, Prague 14220, Czech Republic
| | - Peter Barath
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava 84538, Slovakia
| | - Petr Dzubak
- Institute of Molecular and Translational Medicine, Palacky University, Olomouc 77147, Czech Republic
| | - Dusan Holub
- Institute of Molecular and Translational Medicine, Palacky University, Olomouc 77147, Czech Republic
| | - Marian Hajduch
- Institute of Molecular and Translational Medicine, Palacky University, Olomouc 77147, Czech Republic
| | - Zuzana Nahacka
- Laboratory of Molecular Therapy, Institute of Biotechnology of the ASCR, Prague 14220, Czech Republic
| | - Ladislav Andera
- Laboratory of Molecular Therapy, Institute of Biotechnology of the ASCR, Prague 14220, Czech Republic
| | - Petr Holicek
- Laboratory of Molecular Therapy, Institute of Biotechnology of the ASCR, Prague 14220, Czech Republic
| | - Pavla Vasicova
- Department of Genome Integrity, Institute of Molecular Genetics of the ASCR, Prague 14220, Czech Republic
| | - Olena Sapega
- Laboratory of Immunological and Tumour Models, Institute of Molecular Genetics of the ASCR, Prague 14220, Czech Republic
| | - Jiri Bartek
- Department of Genome Integrity, Institute of Molecular Genetics of the ASCR, Prague 14220, Czech Republic.,Danish Cancer Society Research Center, Copenhagen DK-2100, Denmark.,Division of Genome Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm, Sweden
| | - Zdenek Hodny
- Department of Genome Integrity, Institute of Molecular Genetics of the ASCR, Prague 14220, Czech Republic
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14
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Rabbani N, Thornalley PJ. Hexokinase-2 Glycolytic Overload in Diabetes and Ischemia-Reperfusion Injury. Trends Endocrinol Metab 2019; 30:419-431. [PMID: 31221272 DOI: 10.1016/j.tem.2019.04.011] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 04/21/2019] [Accepted: 04/25/2019] [Indexed: 01/12/2023]
Abstract
Hexokinase-2 (HK2) was recently found to produce increased metabolic flux through glycolysis in hyperglycemia without concurrent transcriptional or other functional regulation. Rather, stabilization to proteolysis by increased glucose substrate binding produced unscheduled increased glucose metabolism in response to high cytosolic glucose concentration. This produces abnormal increases in glycolytic intermediates or glycolytic overload, driving cell dysfunction and vulnerability to the damaging effects of hyperglycemia in diabetes, explaining tissue-specific pathogenesis. Glycolytic overload is also activated in ischemia-reperfusion injury and cell senescence. A further key feature is HK2 displacement from mitochondria by increased glucose-6-phosphate concentration, inducing mitochondrial dysfunction and oxidative stress. This pathogenic mechanism suggested new targets for therapeutics development that gave promising outcomes in initial clinical evaluation.
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Affiliation(s)
- Naila Rabbani
- Clinical Sciences Research Laboratories, Warwick Medical School, University of Warwick, University Hospital, Coventry CV2 2DX, UK
| | - Paul J Thornalley
- Diabetes Research Center, Qatar Biomedical Research Institute, Hamad Bin Khalifa University, Qatar Foundation, P.O. Box 34110, Doha, Qatar.
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15
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Macrin D, Alghadeer A, Zhao YT, Miklas JW, Hussein AM, Detraux D, Robitaille AM, Madan A, Moon RT, Wang Y, Devi A, Mathieu J, Ruohola-Baker H. Metabolism as an early predictor of DPSCs aging. Sci Rep 2019; 9:2195. [PMID: 30778087 PMCID: PMC6379364 DOI: 10.1038/s41598-018-37489-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 11/30/2018] [Indexed: 02/07/2023] Open
Abstract
Tissue resident adult stem cells are known to participate in tissue regeneration and repair that follows cell turnover, or injury. It has been well established that aging impedes the regeneration capabilities at the cellular level, but it is not clear if the different onset of stem cell aging between individuals can be predicted or prevented at an earlier stage. Here we studied the dental pulp stem cells (DPSCs), a population of adult stem cells that is known to participate in the repair of an injured tooth, and its properties can be affected by aging. The dental pulp from third molars of a diverse patient group were surgically extracted, generating cells that had a high percentage of mesenchymal stem cell markers CD29, CD44, CD146 and Stro1 and had the ability to differentiate into osteo/odontogenic and adipogenic lineages. Through RNA seq and qPCR analysis we identified homeobox protein, Barx1, as a marker for DPSCs. Furthermore, using high throughput transcriptomic and proteomic analysis we identified markers for DPSC populations with accelerated replicative senescence. In particular, we show that the transforming growth factor-beta (TGF-β) pathway and the cytoskeletal proteins are upregulated in rapid aging DPSCs, indicating a loss of stem cell characteristics and spontaneous initiation of terminal differentiation. Importantly, using metabolic flux analysis, we identified a metabolic signature for the rapid aging DPSCs, prior to manifestation of senescence phenotypes. This metabolic signature therefore can be used to predict the onset of replicative senescence. Hence, the present study identifies Barx1 as a DPSCs marker and dissects the first predictive metabolic signature for DPSCs aging.
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Affiliation(s)
- Dannie Macrin
- Department of Biochemistry, University of Washington, School of Medicine, Seattle, WA, 98195, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA, 98109, USA.,Department of Genetic Engineering, SRM Institute of Science and Technology, Chennai, 603203, India
| | - Ammar Alghadeer
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA, 98109, USA.,Department of Oral Health Sciences, University of Washington, School of Dentistry, Seattle, WA, 98109, USA.,Department of Biomedical Dental Sciences, Imam Abdulrahman bin Faisal University, College of Dentistry, Dammam, 31441, Saudi Arabia
| | - Yan Ting Zhao
- Department of Biochemistry, University of Washington, School of Medicine, Seattle, WA, 98195, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA, 98109, USA.,Department of Oral Health Sciences, University of Washington, School of Dentistry, Seattle, WA, 98109, USA
| | - Jason W Miklas
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA, 98109, USA.,Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Abdiasis M Hussein
- Department of Biochemistry, University of Washington, School of Medicine, Seattle, WA, 98195, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA, 98109, USA
| | - Damien Detraux
- Department of Biochemistry, University of Washington, School of Medicine, Seattle, WA, 98195, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA, 98109, USA
| | - Aaron M Robitaille
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA, 98109, USA.,Department of Pharmacology, University of Washington, Seattle, WA, 98109, USA
| | - Anup Madan
- Covance Genomics Laboratory, Redmond, WA, 98052, USA
| | - Randall T Moon
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA, 98109, USA.,Department of Pharmacology, University of Washington, Seattle, WA, 98109, USA
| | - Yuliang Wang
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA, 98109, USA.,Paul G. Allen School of Computer Science and Engineering, University of Washington, Seattle, WA, 98195, USA
| | - Arikketh Devi
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA, 98109, USA.,Department of Genetic Engineering, SRM Institute of Science and Technology, Chennai, 603203, India
| | - Julie Mathieu
- Department of Biochemistry, University of Washington, School of Medicine, Seattle, WA, 98195, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA, 98109, USA.,Department of Comparative Medicine, University of Washington, School of Medicine, Seattle, WA, 98195, USA
| | - Hannele Ruohola-Baker
- Department of Biochemistry, University of Washington, School of Medicine, Seattle, WA, 98195, USA. .,Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA, 98109, USA. .,Department of Oral Health Sciences, University of Washington, School of Dentistry, Seattle, WA, 98109, USA. .,Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA.
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16
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Voic H, Li X, Jang JH, Zou C, Sundd P, Alder J, Rojas M, Chandra D, Randell S, Mallampalli RK, Tesfaigzi Y, Ryba T, Nyunoya T. RNA sequencing identifies common pathways between cigarette smoke exposure and replicative senescence in human airway epithelia. BMC Genomics 2019; 20:22. [PMID: 30626320 PMCID: PMC6325884 DOI: 10.1186/s12864-018-5409-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 12/26/2018] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND Aging is affected by genetic and environmental factors, and cigarette smoking is strongly associated with accumulation of senescent cells. In this study, we wanted to identify genes that may potentially be beneficial for cell survival in response to cigarette smoke and thereby may contribute to development of cellular senescence. RESULTS Primary human bronchial epithelial cells from five healthy donors were cultured, treated with or without 1.5% cigarette smoke extract (CSE) for 24 h or were passaged into replicative senescence. Transcriptome changes were monitored using RNA-seq in CSE and non-CSE exposed cells and those passaged into replicative senescence. We found that, among 1534 genes differentially regulated during senescence and 599 after CSE exposure, 243 were altered in both conditions, representing strong enrichment. Pathways and gene sets overrepresented in both conditions belonged to cellular processes that regulate reactive oxygen species, proteasome degradation, and NF-κB signaling. CONCLUSIONS Our results offer insights into gene expression responses during cellular aging and cigarette smoke exposure, and identify potential molecular pathways that are altered by cigarette smoke and may also promote airway epithelial cell senescence.
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Affiliation(s)
- Hannah Voic
- 0000 0004 0504 9575grid.422569.eDivision of Natural Sciences, New College of Florida, Sarasota, FL USA
| | - Xiuying Li
- 0000 0004 1936 9000grid.21925.3dDepartment of Medicine, University of Pittsburgh, NW628 UPMC Montefiore, 3459 Fifth Avenue, Pittsburgh, PA 15213 USA ,0000 0004 0420 3665grid.413935.9VA Pittsburgh Healthcare System, Pittsburgh, PA USA
| | - Jun-Ho Jang
- 0000 0004 0454 5075grid.417046.0Cardiovascular Institute, Department of Medicine, Allegheny Health Network, Pittsburgh, PA USA
| | - Chunbin Zou
- 0000 0004 1936 9000grid.21925.3dDepartment of Medicine, University of Pittsburgh, NW628 UPMC Montefiore, 3459 Fifth Avenue, Pittsburgh, PA 15213 USA ,0000 0004 0420 3665grid.413935.9VA Pittsburgh Healthcare System, Pittsburgh, PA USA
| | - Prithu Sundd
- 0000 0004 1936 9000grid.21925.3dVascular Medicine Institute, Department of Medicine, University of Pittsburgh, Pittsburgh, PA USA
| | - Jonathan Alder
- 0000 0004 1936 9000grid.21925.3dDepartment of Medicine, University of Pittsburgh, NW628 UPMC Montefiore, 3459 Fifth Avenue, Pittsburgh, PA 15213 USA
| | - Mauricio Rojas
- 0000 0004 1936 9000grid.21925.3dDepartment of Medicine, University of Pittsburgh, NW628 UPMC Montefiore, 3459 Fifth Avenue, Pittsburgh, PA 15213 USA
| | - Divay Chandra
- 0000 0004 1936 9000grid.21925.3dDepartment of Medicine, University of Pittsburgh, NW628 UPMC Montefiore, 3459 Fifth Avenue, Pittsburgh, PA 15213 USA
| | - Scott Randell
- 0000 0001 1034 1720grid.410711.2Department of Cell and Molecular Physiology, University of North Carolina, Chapel Hill, NC USA
| | - Rama K. Mallampalli
- 0000 0004 1936 9000grid.21925.3dDepartment of Medicine, University of Pittsburgh, NW628 UPMC Montefiore, 3459 Fifth Avenue, Pittsburgh, PA 15213 USA ,0000 0004 0420 3665grid.413935.9VA Pittsburgh Healthcare System, Pittsburgh, PA USA
| | - Yohannes Tesfaigzi
- Lovelace Respiratory Research Institute, COPD program, Albuquerque, NM USA
| | - Tyrone Ryba
- 0000 0004 0504 9575grid.422569.eDivision of Natural Sciences, New College of Florida, Sarasota, FL USA
| | - Toru Nyunoya
- 0000 0004 1936 9000grid.21925.3dDepartment of Medicine, University of Pittsburgh, NW628 UPMC Montefiore, 3459 Fifth Avenue, Pittsburgh, PA 15213 USA ,0000 0004 0420 3665grid.413935.9VA Pittsburgh Healthcare System, Pittsburgh, PA USA
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17
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Zingg JM. Vitamin E: Regulatory Role on Signal Transduction. IUBMB Life 2018; 71:456-478. [PMID: 30556637 DOI: 10.1002/iub.1986] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 11/20/2018] [Accepted: 11/21/2018] [Indexed: 01/02/2023]
Abstract
Vitamin E modulates signal transduction pathways by several molecular mechanisms. As a hydrophobic molecule located mainly in membranes it contributes together with other lipids to the physical and structural characteristics such as membrane stability, curvature, fluidity, and the organization into microdomains (lipid rafts). By acting as the main lipid-soluble antioxidant, it protects other lipids such as mono- and poly-unsaturated fatty acids (MUFA and PUFA, respectively) against chemical reactions with reactive oxygen and nitrogen species (ROS and RNS, respectively) and prevents membrane destabilization and cellular dysfunction. In cells, vitamin E affects signaling in redox-dependent and redox-independent molecular mechanisms by influencing the activity of enzymes and receptors involved in modulating specific signal transduction and gene expression pathways. By protecting and preventing depletion of MUFA and PUFA it indirectly enables regulatory effects that are mediated by the numerous lipid mediators derived from these lipids. In recent years, some vitamin E metabolites have been observed to affect signal transduction and gene expression and their relevance for the regulatory function of vitamin E is beginning to be elucidated. In particular, the modulation of the CD36/FAT scavenger receptor/fatty acids transporter by vitamin E may influence many cellular signaling pathways relevant for lipid homeostasis, inflammation, survival/apoptosis, angiogenesis, tumorigenesis, neurodegeneration, and senescence. Thus, vitamin E has an important role in modulating signal transduction and gene expression pathways relevant for its uptake, distribution, metabolism, and molecular action that when impaired affect physiological and patho-physiological cellular functions relevant for the prevention of a number of diseases. © 2018 IUBMB Life, 71(4):456-478, 2019.
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Affiliation(s)
- Jean-Marc Zingg
- Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, Miami, Florida, USA
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18
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Sulforaphane Delays Fibroblast Senescence by Curbing Cellular Glucose Uptake, Increased Glycolysis, and Oxidative Damage. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:5642148. [PMID: 30595796 PMCID: PMC6282131 DOI: 10.1155/2018/5642148] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 10/03/2018] [Indexed: 01/23/2023]
Abstract
Increased cell senescence contributes to the pathogenesis of aging and aging-related disease. Senescence of human fibroblasts in vitro may be delayed by culture in low glucose concentration. There is also accumulating evidence of senescence delay by exposure to dietary bioactive compounds that activate transcription factor Nrf2. The mechanism of cell senescence delay and connection between these responses is unknown. We describe herein that the cruciferous vegetable-derived metabolite, sulforaphane (SFN), activates Nrf2 and delays senescence of human MRC-5 and BJ fibroblasts in vitro. Cell senescence is associated with a progressive and marked increased rate of glucose metabolism through glycolysis. This increases mitochondrial dysfunction and overwhelms defences against reactive metabolites, leading to increasing proteomic and genomic oxidative damage. Increased glucose entry into glycolysis in fibroblast senescence is mainly mediated by increased hexokinase-2. SFN delayed senescence by decreasing glucose metabolism on the approach to senescence, exhibiting a caloric restriction mimetic-like activity and thereby decreased oxidative damage to cell protein and DNA. This was associated with increased expression of thioredoxin-interacting protein, curbing entry of glucose into cells; decreased hexokinase-2, curbing entry of glucose into cellular metabolism; decreased 6-phosphofructo-2-kinase, downregulating formation of allosteric enhancer of glycolysis fructose-2,6-bisphosphate; and increased glucose-6-phosphate dehydrogenase, downregulating carbohydrate response element- (ChRE-) mediated transcriptional enhancement of glycolysis by Mondo/Mlx. SFN also enhanced clearance of proteins cross-linked by transglutaminase which otherwise increased in senescence. This suggests that screening of compounds to counter senescence-associated glycolytic overload may be an effective strategy to identify compounds with antisenescence activity and health beneficial effects of SFN in longevity may involve delay of senescence through glucose and glycolytic restriction response.
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19
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Mamoshina P, Volosnikova M, Ozerov IV, Putin E, Skibina E, Cortese F, Zhavoronkov A. Machine Learning on Human Muscle Transcriptomic Data for Biomarker Discovery and Tissue-Specific Drug Target Identification. Front Genet 2018; 9:242. [PMID: 30050560 PMCID: PMC6052089 DOI: 10.3389/fgene.2018.00242] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 06/19/2018] [Indexed: 12/17/2022] Open
Abstract
For the past several decades, research in understanding the molecular basis of human muscle aging has progressed significantly. However, the development of accessible tissue-specific biomarkers of human muscle aging that may be measured to evaluate the effectiveness of therapeutic interventions is still a major challenge. Here we present a method for tracking age-related changes of human skeletal muscle. We analyzed publicly available gene expression profiles of young and old tissue from healthy donors. Differential gene expression and pathway analysis were performed to compare signatures of young and old muscle tissue and to preprocess the resulting data for a set of machine learning algorithms. Our study confirms the established mechanisms of human skeletal muscle aging, including dysregulation of cytosolic Ca2+ homeostasis, PPAR signaling and neurotransmitter recycling along with IGFR and PI3K-Akt-mTOR signaling. Applying several supervised machine learning techniques, including neural networks, we built a panel of tissue-specific biomarkers of aging. Our predictive model achieved 0.91 Pearson correlation with respect to the actual age values of the muscle tissue samples, and a mean absolute error of 6.19 years on the test set. The performance of models was also evaluated on gene expression samples of the skeletal muscles from the Gene expression Genotype-Tissue Expression (GTEx) project. The best model achieved the accuracy of 0.80 with respect to the actual age bin prediction on the external validation set. Furthermore, we demonstrated that aging biomarkers can be used to identify new molecular targets for tissue-specific anti-aging therapies.
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Affiliation(s)
- Polina Mamoshina
- Pharmaceutical Artificial Intelligence Department, Insilico Medicine, Inc., Baltimore, MD, United States.,Department of Computer Science, University of Oxford, Oxford, United Kingdom
| | - Marina Volosnikova
- Pharmaceutical Artificial Intelligence Department, Insilico Medicine, Inc., Baltimore, MD, United States
| | - Ivan V Ozerov
- Pharmaceutical Artificial Intelligence Department, Insilico Medicine, Inc., Baltimore, MD, United States
| | - Evgeny Putin
- Pharmaceutical Artificial Intelligence Department, Insilico Medicine, Inc., Baltimore, MD, United States.,Computer Technologies Lab, Saint Petersburg State University of Information Technologies, Mechanics and Optics, Saint Petersburg, Russia
| | - Ekaterina Skibina
- Pharmaceutical Artificial Intelligence Department, Insilico Medicine, Inc., Baltimore, MD, United States
| | - Franco Cortese
- Biogerontology Research Foundation, London, United Kingdom
| | - Alex Zhavoronkov
- Pharmaceutical Artificial Intelligence Department, Insilico Medicine, Inc., Baltimore, MD, United States.,Biogerontology Research Foundation, London, United Kingdom.,Buck Institute for Research on Aging, Novato, CA, United States
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20
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Heinzelmann K, Lehmann M, Gerckens M, Noskovičová N, Frankenberger M, Lindner M, Hatz R, Behr J, Hilgendorff A, Königshoff M, Eickelberg O. Cell-surface phenotyping identifies CD36 and CD97 as novel markers of fibroblast quiescence in lung fibrosis. Am J Physiol Lung Cell Mol Physiol 2018; 315:L682-L696. [PMID: 29952218 DOI: 10.1152/ajplung.00439.2017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Fibroblasts play an important role in lung homeostasis and disease. In lung fibrosis, fibroblasts adopt a proliferative and migratory phenotype, with increased expression of α-smooth muscle actin (αSMA) and enhanced secretion of extracellular matrix components. Comprehensive profiling of fibroblast heterogeneity is limited because of a lack of specific cell-surface markers. We have previously profiled the surface proteome of primary human lung fibroblasts. Here, we sought to define and quantify a panel of cluster of differentiation (CD) markers in primary human lung fibroblasts and idiopathic pulmonary fibrosis (IPF) lung tissue, using immunofluorescence and FACS analysis. Fibroblast function was assessed by analysis of replicative senescence. We observed the presence of distinct fibroblast phenotypes in vivo, characterized by various combinations of Desmin, αSMA, CD36, or CD97 expression. Most markers demonstrated stable expression over passages in vitro, but significant changes were observed for CD36, CD54, CD82, CD106, and CD140a. Replicative senescence of fibroblasts was observed from passage 10 onward. CD36- and CD97-positive but αSMA-negative cells were present in remodeled areas of IPF lungs. Transforming growth factor (TGF)-β treatment induced αSMA and collagen I expression but repressed CD36 and CD97 expression. We identified a panel of stable surface markers in human lung fibroblasts, applicable for positive-cell isolation directly from lung tissue. TGF-β exposure represses CD36 and CD97 expression, despite increasing αSMA expression; we therefore identified complex surface protein changes during fibroblast-myofibroblast activation. Coexistence of quiescence and activated fibroblast subtypes in the IPF lung suggests dynamic remodeling of fibroblast activation upon subtle changes to growth factor exposure in local microenvironmental niches.
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Affiliation(s)
- Katharina Heinzelmann
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany
| | - Mareike Lehmann
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany
| | - Michael Gerckens
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany
| | - Nina Noskovičová
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany
| | - Marion Frankenberger
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany
| | - Michael Lindner
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany.,Thoraxchirurgisches Zentrum München, Asklepios Fachkliniken München-Gauting, Munich , Germany
| | - Rudolf Hatz
- Thoraxchirurgisches Zentrum München, Asklepios Fachkliniken München-Gauting, Munich , Germany.,Thoraxchirurgisches Zentrum, Klinik für Allgemeine-, Viszeral-, Transplantations-, Gefäss- und Thoraxchirurgie, Klinikum Grosshadern, Ludwig-Maximilians-Universität, Munich , Germany
| | - Jürgen Behr
- Thoraxchirurgisches Zentrum München, Asklepios Fachkliniken München-Gauting, Munich , Germany.,Medizinische Klinik und Poliklinik V, Klinikum der Ludwig-Maximilians-Universität, Munich , Germany
| | - Anne Hilgendorff
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany.,Department of Neonatology, Perinatal Center Grosshadern, Ludwig-Maximilians University , Munich , Germany.,Center for Comprehensive Developmental Care, Dr. von Haunersches Children's Hospital University Hospital Ludwig-Maximilians University , Munich , Germany
| | - Melanie Königshoff
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany.,Division of Respiratory Sciences and Critical Care Medicine, University of Colorado , Denver, Colorado
| | - Oliver Eickelberg
- Comprehensive Pneumology Center, University Hospital of the Ludwig-Maximilians University, Munich and Helmholtz Zentrum München, Member of the Comprehensive Pneumology Center-Munich BioArchive, Member of the German Center for Lung Research , Munich , Germany.,Division of Respiratory Sciences and Critical Care Medicine, University of Colorado , Denver, Colorado
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21
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Sugaya Y, Satoh H. Liver-specific G 0 /G 1 switch gene 2 (G0s2) expression promotes hepatic insulin resistance by exacerbating hepatic steatosis in male Wistar rats. J Diabetes 2017; 9:754-763. [PMID: 27624922 DOI: 10.1111/1753-0407.12482] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/18/2016] [Accepted: 09/08/2016] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Hepatic steatosis is strongly associated with insulin resistance. It has been reported that G0 /G1 switch gene 2 (G0s2) inhibits the lipolytic activity of adipose triglyceride lipase, which is a major lipase in the liver as well as in adipocytes. Moreover, G0s2 protein content is increased in the livers of high-fat diet (HFD)-fed rats. In the present study, we investigated the effect of hepatic G0s2 on insulin sensitivity in male Wistar rats. METHODS Male Wistar rats were fed a 60% HFD for 4 weeks. After 3 weeks of feeding, rats were injected with adenovirus-expressing green fluorescent protein (Ad-GFP; control) or adenovirus-expressing mouse G0s2 (Ad-G0s2). On Day 7 after injection, a euglycemic-hyperinsulinemic clamp study was performed in rats fasted for 8 h. RESULTS Body weight and fasting glucose levels were not significantly different between the Ad-GFP and Ad-G0s2 groups. During the clamp study, the glucose infusion rate required for euglycemia decreased significantly by 16% in the Ad-G0s2 compared with Ad-GFP group. The insulin-suppressed hepatic glucose output increased significantly in the Ad-G0s2 group, but the insulin-stimulated glucose disposal rate was not significantly different between the two groups. Consistent with the clamp data, insulin-stimulated phosphorylation of Akt decreased significantly in livers of rats injected with Ad-G0s2. Furthermore, Oil Red O-staining indicated that overexpression of G0s2 protein in the liver promoted hepatic steatosis by 2.5-fold in HFD-fed rats. CONCLUSION The results of the present study indicate that hepatic G0s2 protein may promote hepatic insulin resistance by exacerbating hepatic steatosis.
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Affiliation(s)
- Yoshiyuki Sugaya
- Department of Nephrology, Hypertension, Diabetology, Endocrinology, and Metabolism, Fukushima Medical University, Fukushima, Japan
| | - Hiroaki Satoh
- Department of Nephrology, Hypertension, Diabetology, Endocrinology, and Metabolism, Fukushima Medical University, Fukushima, Japan
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22
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Lizardo DY, Lin YL, Gokcumen O, Atilla-Gokcumen GE. Regulation of lipids is central to replicative senescence. MOLECULAR BIOSYSTEMS 2017; 13:498-509. [PMID: 28128379 DOI: 10.1039/c6mb00842a] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Cellular replicative senescence, a state of permanent cell-cycle arrest, has been linked to organismal aging, tissue repair and tumorigenesis. In this study, we comparatively investigated the global lipid profiles and mRNA content of proliferating and senescent-state BJ fibroblasts. We found that both expression levels of lipid-regulating genes and the abundance of specific lipid families, are actively regulated. We further found that 19 specific polyunsaturated triacylglycerol species constituted the most prominent changes in lipid composition during replicative senescence. Based on the transcriptome analysis, we propose that the activation of CD36-mediated fatty acid uptake and diversion to glycerolipid biosynthesis could be responsible for the accumulation of triacylglycerols during replicative senescence. This, in turn, could be a cellular mechanism to prevent lipotoxicity under increased oxidative stress conditions observed in this process. Our results indicate that regulation of specific lipid species has a central role during replicative senescence.
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Affiliation(s)
- Darleny Y Lizardo
- Department of Chemistry, University at Buffalo, The State University of New York (SUNY), Buffalo, NY 14260 USA.
| | - Yen-Lung Lin
- Department of Biological Sciences, University at Buffalo, The State University of New York (SUNY), Buffalo, NY 14260 USA.
| | - Omer Gokcumen
- Department of Biological Sciences, University at Buffalo, The State University of New York (SUNY), Buffalo, NY 14260 USA.
| | - G Ekin Atilla-Gokcumen
- Department of Chemistry, University at Buffalo, The State University of New York (SUNY), Buffalo, NY 14260 USA.
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23
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Crowe EP, Tuzer F, Gregory BD, Donahue G, Gosai SJ, Cohen J, Leung YY, Yetkin E, Nativio R, Wang LS, Sell C, Bonini NM, Berger SL, Johnson FB, Torres C. Changes in the Transcriptome of Human Astrocytes Accompanying Oxidative Stress-Induced Senescence. Front Aging Neurosci 2016; 8:208. [PMID: 27630559 PMCID: PMC5005348 DOI: 10.3389/fnagi.2016.00208] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 08/15/2016] [Indexed: 01/23/2023] Open
Abstract
Aging is a major risk factor for many neurodegenerative disorders. A key feature of aging biology that may underlie these diseases is cellular senescence. Senescent cells accumulate in tissues with age, undergo widespread changes in gene expression, and typically demonstrate altered, pro-inflammatory profiles. Astrocyte senescence has been implicated in neurodegenerative disease, and to better understand senescence-associated changes in astrocytes, we investigated changes in their transcriptome using RNA sequencing. Senescence was induced in human fetal astrocytes by transient oxidative stress. Brain-expressed genes, including those involved in neuronal development and differentiation, were downregulated in senescent astrocytes. Remarkably, several genes indicative of astrocytic responses to injury were also downregulated, including glial fibrillary acidic protein and genes involved in the processing and presentation of antigens by major histocompatibility complex class II proteins, while pro-inflammatory genes were upregulated. Overall, our findings suggest that senescence-related changes in the function of astrocytes may impact the pathogenesis of age-related brain disorders.
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Affiliation(s)
- Elizabeth P Crowe
- Department of Pathology and Laboratory Medicine, Drexel University College of Medicine, Philadelphia PA, USA
| | - Ferit Tuzer
- Department of Pathology and Laboratory Medicine, Drexel University College of Medicine, Philadelphia PA, USA
| | - Brian D Gregory
- Department of Biology, Penn Genome Frontiers Institute, University of Pennsylvania, Philadelphia PA, USA
| | - Greg Donahue
- Epigenetics Program, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia PA, USA
| | - Sager J Gosai
- Department of Biology, Penn Genome Frontiers Institute, University of Pennsylvania, Philadelphia PA, USA
| | - Justin Cohen
- Department of Pathology and Laboratory Medicine, Drexel University College of Medicine, Philadelphia PA, USA
| | - Yuk Y Leung
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia PA, USA
| | - Emre Yetkin
- Department of Pathology and Laboratory Medicine, Drexel University College of Medicine, Philadelphia PA, USA
| | - Raffaella Nativio
- Epigenetics Program, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia PA, USA
| | - Li-San Wang
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia PA, USA
| | - Christian Sell
- Department of Pathology and Laboratory Medicine, Drexel University College of Medicine, Philadelphia PA, USA
| | - Nancy M Bonini
- Department of Biology, Penn Genome Frontiers Institute, University of Pennsylvania, Philadelphia PA, USA
| | - Shelley L Berger
- Epigenetics Program, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia PA, USA
| | - F Brad Johnson
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia PA, USA
| | - Claudio Torres
- Department of Pathology and Laboratory Medicine, Drexel University College of Medicine, Philadelphia PA, USA
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24
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Marthandan S, Menzel U, Priebe S, Groth M, Guthke R, Platzer M, Hemmerich P, Kaether C, Diekmann S. Conserved genes and pathways in primary human fibroblast strains undergoing replicative and radiation induced senescence. Biol Res 2016; 49:34. [PMID: 27464526 PMCID: PMC4963952 DOI: 10.1186/s40659-016-0095-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 07/19/2016] [Indexed: 01/01/2023] Open
Abstract
Background Cellular senescence is induced either internally, for example by replication exhaustion and cell division, or externally, for example by irradiation. In both cases, cellular damages accumulate which, if not successfully repaired, can result in senescence induction. Recently, we determined the transcriptional changes combined with the transition into replicative senescence in primary human fibroblast strains. Here, by γ-irradiation we induced premature cellular senescence in the fibroblast cell strains (HFF and MRC-5) and determined the corresponding transcriptional changes by high-throughput RNA sequencing. Results Comparing the transcriptomes, we found a high degree of similarity in differential gene expression in replicative as well as in irradiation induced senescence for both cell strains suggesting, in each cell strain, a common cellular response to error accumulation. On the functional pathway level, “Cell cycle” was the only pathway commonly down-regulated in replicative and irradiation-induced senescence in both fibroblast strains, confirming the tight link between DNA repair and cell cycle regulation. However, “DNA repair” and “replication” pathways were down-regulated more strongly in fibroblasts undergoing replicative exhaustion. We also retrieved genes and pathways in each of the cell strains specific for irradiation induced senescence. Conclusion We found the pathways associated with “DNA repair” and “replication” less stringently regulated in irradiation induced compared to replicative senescence. The strong regulation of these pathways in replicative senescence highlights the importance of replication errors for its induction. Electronic supplementary material The online version of this article (doi:10.1186/s40659-016-0095-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Shiva Marthandan
- Leibniz Institute for Age Research-Fritz Lipmann Institute e.V. (FLI), Beutenbergstrasse 11, 07745, Jena, Germany.
| | - Uwe Menzel
- Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute e.V. (HKI), Jena, Germany
| | - Steffen Priebe
- Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute e.V. (HKI), Jena, Germany
| | - Marco Groth
- Leibniz Institute for Age Research-Fritz Lipmann Institute e.V. (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
| | - Reinhard Guthke
- Leibniz Institute for Natural Product Research and Infection Biology-Hans-Knöll-Institute e.V. (HKI), Jena, Germany
| | - Matthias Platzer
- Leibniz Institute for Age Research-Fritz Lipmann Institute e.V. (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
| | - Peter Hemmerich
- Leibniz Institute for Age Research-Fritz Lipmann Institute e.V. (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
| | - Christoph Kaether
- Leibniz Institute for Age Research-Fritz Lipmann Institute e.V. (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
| | - Stephan Diekmann
- Leibniz Institute for Age Research-Fritz Lipmann Institute e.V. (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
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25
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Marthandan S, Baumgart M, Priebe S, Groth M, Schaer J, Kaether C, Guthke R, Cellerino A, Platzer M, Diekmann S, Hemmerich P. Conserved Senescence Associated Genes and Pathways in Primary Human Fibroblasts Detected by RNA-Seq. PLoS One 2016; 11:e0154531. [PMID: 27140416 PMCID: PMC4854426 DOI: 10.1371/journal.pone.0154531] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 04/14/2016] [Indexed: 12/15/2022] Open
Abstract
Cellular senescence correlates with changes in the transcriptome. To obtain a complete view on senescence-associated transcription networks and pathways, we assessed by deep RNA sequencing the transcriptomes of five of the most commonly used laboratory strains of human fibroblasts during their transition into senescence. In a number of cases, we verified the RNA-seq data by real-time PCR. By determining cellular protein levels we observed that the age-related expression of most but not all genes is regulated at the transcriptional level. We found that 78% of the age-affected differentially expressed genes were commonly regulated in the same direction (either up- or down-regulated) in all five fibroblast strains, indicating a strong conservation of age-associated changes in the transcriptome. KEGG pathway analyses confirmed up-regulation of the senescence-associated secretory phenotype and down-regulation of DNA synthesis/repair and most cell cycle pathways common in all five cell strains. Newly identified senescence-induced pathways include up-regulation of endocytotic/phagocytic pathways and down-regulation of the mRNA metabolism and the mRNA splicing pathways. Our results provide an unprecedented comprehensive and deep view into the individual and common transcriptome and pathway changes during the transition into of senescence of five human fibroblast cell strains.
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Affiliation(s)
- S. Marthandan
- Leibniz-Institute on Aging—Fritz Lipmann Institute e.V. (FLI), Jena, Germany
- * E-mail:
| | - M. Baumgart
- Leibniz-Institute on Aging—Fritz Lipmann Institute e.V. (FLI), Jena, Germany
| | - S. Priebe
- Leibniz Institute for Natural Product Research and Infection Biology—Hans-Knöll-Institute e.V. (HKI), Jena, Germany
| | - M. Groth
- Leibniz-Institute on Aging—Fritz Lipmann Institute e.V. (FLI), Jena, Germany
| | - J. Schaer
- Leibniz Institute for Natural Product Research and Infection Biology—Hans-Knöll-Institute e.V. (HKI), Jena, Germany
| | - C. Kaether
- Leibniz-Institute on Aging—Fritz Lipmann Institute e.V. (FLI), Jena, Germany
| | - R. Guthke
- Leibniz Institute for Natural Product Research and Infection Biology—Hans-Knöll-Institute e.V. (HKI), Jena, Germany
| | - A. Cellerino
- Leibniz-Institute on Aging—Fritz Lipmann Institute e.V. (FLI), Jena, Germany
- Laboratory of NeuroBiology, Scuola Normale Superiore, Pisa, Italy
| | - M. Platzer
- Leibniz-Institute on Aging—Fritz Lipmann Institute e.V. (FLI), Jena, Germany
| | - S. Diekmann
- Leibniz-Institute on Aging—Fritz Lipmann Institute e.V. (FLI), Jena, Germany
| | - P. Hemmerich
- Leibniz-Institute on Aging—Fritz Lipmann Institute e.V. (FLI), Jena, Germany
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26
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Maeda K, Enomoto A, Hara A, Asai N, Kobayashi T, Horinouchi A, Maruyama S, Ishikawa Y, Nishiyama T, Kiyoi H, Kato T, Ando K, Weng L, Mii S, Asai M, Mizutani Y, Watanabe O, Hirooka Y, Goto H, Takahashi M. Identification of Meflin as a Potential Marker for Mesenchymal Stromal Cells. Sci Rep 2016; 6:22288. [PMID: 26924503 PMCID: PMC4770287 DOI: 10.1038/srep22288] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 02/11/2016] [Indexed: 01/14/2023] Open
Abstract
Bone marrow-derived mesenchymal stromal cells (BM-MSCs) in culture are derived from BM stromal cells or skeletal stem cells. Whereas MSCs have been exploited in clinical medicine, the identification of MSC-specific markers has been limited. Here, we report that a cell surface and secreted protein, Meflin, is expressed in cultured MSCs, fibroblasts and pericytes, but not other types of cells including epithelial, endothelial and smooth muscle cells. In vivo, Meflin is expressed by immature osteoblasts and chondroblasts. In addition, Meflin is found on stromal cells distributed throughout the BM, and on pericytes and perivascular cells in multiple organs. Meflin maintains the undifferentiated state of cultured MSCs and is downregulated upon their differentiation, consistent with the observation that Meflin-deficient mice exhibit increased number of osteoblasts and accelerated bone development. In the bone and BM, Meflin is more highly expressed in primitive stromal cells that express platelet-derived growth factor receptor α and Sca-1 than the Sca-1-negative adipo-osteogenic progenitors, which create a niche for hematopoiesis. Those results are consistent with a decrease in the number of clonogenic colony-forming unit-fibroblasts within the BM of Meflin-deficient mice. These preliminary data suggest that Meflin is a potential marker for cultured MSCs and their source cells in vivo.
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Affiliation(s)
- Keiko Maeda
- Department of Pathology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan.,Department of Gastroenterology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Atsushi Enomoto
- Department of Pathology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Akitoshi Hara
- Department of Pathology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Naoya Asai
- Department of Pathology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Takeshi Kobayashi
- Department of Physiology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Asuka Horinouchi
- Department of Nephrology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Shoichi Maruyama
- Department of Nephrology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Yuichi Ishikawa
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, , 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Takahiro Nishiyama
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, , 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Hitoshi Kiyoi
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, , 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Takuya Kato
- Tumour Cell Biology Laboratory, The Francis-Crick Institute, 44 Lincoln's Inn Fields, London, WC2A 3LY, United Kingdom
| | - Kenju Ando
- Department of Pathology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Liang Weng
- Department of Pathology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Shinji Mii
- Department of Pathology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Masato Asai
- Department of Pathology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Yasuyuki Mizutani
- Department of Pathology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan.,Department of Gastroenterology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Osamu Watanabe
- Department of Gastroenterology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Yoshiki Hirooka
- Department of Gastroenterology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Hidemi Goto
- Department of Gastroenterology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Masahide Takahashi
- Department of Pathology, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
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27
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Yim CY, Sekula DJ, Hever-Jardine MP, Liu X, Warzecha JM, Tam J, Freemantle SJ, Dmitrovsky E, Spinella MJ. G0S2 Suppresses Oncogenic Transformation by Repressing a MYC-Regulated Transcriptional Program. Cancer Res 2016; 76:1204-13. [PMID: 26837760 DOI: 10.1158/0008-5472.can-15-2265] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 12/08/2015] [Indexed: 01/31/2023]
Abstract
Methylation-mediated silencing of G0-G1 switch gene 2 (G0S2) has been detected in a variety of solid tumors, whereas G0S2 induction is associated with remissions in patients with acute promyelocytic leukemia, implying that G0S2 may possess tumor suppressor activity. In this study, we clearly demonstrate that G0S2 opposes oncogene-induced transformation using G0s2-null immortalized mouse embryonic fibroblasts (MEF). G0s2-null MEFs were readily transformed with HRAS or EGFR treatment compared with wild-type MEFs. Importantly, restoration of G0S2 reversed HRAS-driven transformation. G0S2 is known to regulate fat metabolism by attenuating adipose triglyceride lipase (ATGL), but repression of oncogene-induced transformation by G0S2 was independent of ATGL inhibition. Gene expression analysis revealed an upregulation of gene signatures associated with transformation, proliferation, and MYC targets in G0s2-null MEFs. RNAi-mediated ablation and pharmacologic inhibition of MYC abrogated oncogene-induced transformation of G0s2-null MEFs. Furthermore, we found that G0S2 was highly expressed in normal breast tissues compared with malignant tissue. Intriguingly, high levels of G0S2 were also associated with a decrease in breast cancer recurrence rates, especially in estrogen receptor-positive subtypes, and overexpression of G0S2 repressed the proliferation of breast cancer cells in vitro. Taken together, these findings indicate that G0S2 functions as a tumor suppressor in part by opposing MYC activity, prompting further investigation of the mechanisms by which G0S2 silencing mediates MYC-induced oncogenesis in other malignancies.
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Affiliation(s)
- Christina Y Yim
- Department of Pharmacology and Toxicology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - David J Sekula
- Department of Thoracic/Head and Neck Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Mary P Hever-Jardine
- Department of Pharmacology and Toxicology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Xi Liu
- Department of Thoracic/Head and Neck Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Joshua M Warzecha
- Department of Pharmacology and Toxicology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Janice Tam
- Department of Pharmacology and Toxicology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Sarah J Freemantle
- Department of Pharmacology and Toxicology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Ethan Dmitrovsky
- Department of Thoracic/Head and Neck Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas. Department of Cancer Biology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Michael J Spinella
- Department of Pharmacology and Toxicology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire.
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28
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Donato AJ, Morgan RG, Walker AE, Lesniewski LA. Cellular and molecular biology of aging endothelial cells. J Mol Cell Cardiol 2015; 89:122-35. [PMID: 25655936 PMCID: PMC4522407 DOI: 10.1016/j.yjmcc.2015.01.021] [Citation(s) in RCA: 323] [Impact Index Per Article: 35.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 01/05/2015] [Accepted: 01/27/2015] [Indexed: 12/29/2022]
Abstract
Cardiovascular disease (CVD) is the leading cause of death in the United States and aging is a major risk factor for CVD development. One of the major age-related arterial phenotypes thought to be responsible for the development of CVD in older adults is endothelial dysfunction. Endothelial function is modulated by traditional CVD risk factors in young adults, but advancing age is independently associated with the development of vascular endothelial dysfunction. This endothelial dysfunction results from a reduction in nitric oxide bioavailability downstream of endothelial oxidative stress and inflammation that can be further modulated by traditional CVD risk factors in older adults. Greater endothelial oxidative stress with aging is a result of augmented production from the intracellular enzymes NADPH oxidase and uncoupled eNOS, as well as from mitochondrial respiration in the absence of appropriate increases in antioxidant defenses as regulated by relevant transcription factors, such as FOXO. Interestingly, it appears that NFkB, a critical inflammatory transcription factor, is sensitive to this age-related endothelial redox change and its activation induces transcription of pro-inflammatory cytokines that can further suppress endothelial function, thus creating a vicious feed-forward cycle. This review will discuss the two macro-mechanistic processes, oxidative stress and inflammation, that contribute to endothelial dysfunction with advancing age as well as the cellular and molecular events that lead to the vicious cycle of inflammation and oxidative stress in the aged endothelium. Other potential mediators of this pro-inflammatory endothelial phenotype are increases in immune or senescent cells in the vasculature. Of note, genomic instability, telomere dysfunction or DNA damage has been shown to trigger cell senescence via the p53/p21 pathway and result in increased inflammatory signaling in arteries from older adults. This review will discuss the current state of knowledge regarding the emerging concepts of senescence and genomic instability as mechanisms underlying oxidative stress and inflammation in the aged endothelium. Lastly, energy sensitive/stress resistance pathways (SIRT-1, AMPK, mTOR) are altered in endothelial cells and/or arteries with aging and these pathways may modulate endothelial function via key oxidative stress and inflammation-related transcription factors. This review will also discuss what is known about the role of "energy sensing" longevity pathways in modulating endothelial function with advancing age. With the growing population of older adults, elucidating the cellular and molecular mechanisms of endothelial dysfunction with age is critical to establishing appropriate and measured strategies to utilize pharmacological and lifestyle interventions aimed at alleviating CVD risk. This article is part of a Special Issue entitled "SI: CV Aging".
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Affiliation(s)
- Anthony J Donato
- University of Utah, Department of Internal Medicine, Division of Geriatrics, Salt Lake City, UT, USA; Veteran's Affairs Medical Center-Salt Lake City, Geriatrics Research Education and Clinical Center, Salt Lake City, UT, USA.
| | - R Garrett Morgan
- University of Washington, Department of Pathology, Seattle, WA, USA
| | - Ashley E Walker
- University of Utah, Department of Internal Medicine, Division of Geriatrics, Salt Lake City, UT, USA
| | - Lisa A Lesniewski
- University of Utah, Department of Internal Medicine, Division of Geriatrics, Salt Lake City, UT, USA; Veteran's Affairs Medical Center-Salt Lake City, Geriatrics Research Education and Clinical Center, Salt Lake City, UT, USA
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Combined CSL and p53 downregulation promotes cancer-associated fibroblast activation. Nat Cell Biol 2015; 17:1193-204. [PMID: 26302407 PMCID: PMC4699446 DOI: 10.1038/ncb3228] [Citation(s) in RCA: 163] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2015] [Accepted: 07/20/2015] [Indexed: 12/13/2022]
Abstract
Stromal fibroblast senescence has been linked to aging-associated cancer risk. However, density and proliferation of cancer-associated fibroblasts (CAF) are frequently increased. Loss or down-modulation of the Notch effector CSL/RBP-Jκ in dermal fibroblasts is sufficient for CAF activation and ensuing keratinocyte-derived tumors. We report that CSL silencing induces senescence of primary fibroblasts from dermis, oral mucosa, breast and lung. CSL functions in these cells as direct repressor of multiple senescence- and CAF-effector genes. It also physically interacts with p53, repressing its activity. CSL is down-modulated in stromal fibroblasts of premalignant skin actinic keratosis lesions and squamous cell carcinomas (SCC), while p53 expression and function is down-modulated only in the latter, with paracrine FGF signaling as likely culprit. Concomitant loss of CSL and p53 overcomes fibroblast senescence, enhances expression of CAF effectors and promotes stromal and cancer cell expansion. The findings support a CAF activation/stromal co-evolution model under convergent CSL/p53 control.
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Babizhayev MA, Yegorov YE. Tissue formation and tissue engineering through host cell recruitment or a potential injectable cell-based biocomposite with replicative potential: Molecular mechanisms controlling cellular senescence and the involvement of controlled transient telomerase activation therapies. J Biomed Mater Res A 2015; 103:3993-4023. [PMID: 26034007 DOI: 10.1002/jbm.a.35515] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2015] [Accepted: 05/18/2015] [Indexed: 01/04/2023]
Abstract
Accumulated data indicate that wound-care products should have a composition equivalent to that of the skin: a combination of particular growth factors and extracellular matrix (ECM) proteins endogenous to the skin, together with viable epithelial cells, fibroblasts, and mesenchymal stem cells (MSCs). Strategies consisting of bioengineered dressings and cell-based products have emerged for widespread clinical use; however, their performance is not optimal because chronic wounds persist as a serious unmet medical need. Telomerase, the ribonucleoprotein complex that adds telomeric repeats to the ends of chromosomes, is responsible for telomere maintenance, and its expression is associated with cell immortalization and, in certain cases, cancerogenesis. Telomerase contains a catalytic subunit, the telomerase reverse transcriptase (hTERT). Introduction of TERT into human cells extends both their lifespan and their telomeres to lengths typical of young cells. The regulation of TERT involves transcriptional and posttranscriptional molecular biology mechanisms. The manipulation, regulation of telomerase is multifactorial in mammalian cells, involving overall telomerase gene expression, post-translational protein-protein interactions, and protein phosphorylation. Reactive oxygen species (ROS) have been implicated in aging, apoptosis, and necrosis of cells in numerous diseases. Upon production of high levels of ROS from exogenous or endogenous generators, the redox balance is perturbed and cells are shifted into a state of oxidative stress, which subsequently leads to modifications of intracellular proteins and membrane lipid peroxidation and to direct DNA damage. When the oxidative stress is severe, survival of the cell is dependent on the repair or replacement of damaged molecules, which can result in induction of apoptosis in the injured with ROS cells. ROS-mediated oxidative stress induces the depletion of hTERT from the nucleus via export through the nuclear pores. Nuclear export is initiated by ROS-induced phosphorylation of tyrosine 707 within hTERT by the Src kinase family. It might be presumed that protection of mitochondria against oxidative stress is an important telomere length-independent function for telomerase in cell survival. Biotechnology companies are focused on development of therapeutic telomerase vaccines, telomerase inhibitors, and telomerase promoter-driven cell killing in oncology, have a telomerase antagonist in late preclinical studies. Anti-aging medicine-oriented groups have intervened on the market with products working on telomerase activation for a broad range of degenerative diseases in which replicative senescence or telomere dysfunction may play an important role. Since oxidative damage has been shown to shorten telomeres in tissue culture models, the adequate topical, transdermal, or systemic administration of antioxidants (such as, patented ocular administration of 1% N-acetylcarnosine lubricant eye drops in the treatment of cataracts) may be beneficial at preserving telomere lengths and delaying the onset or in treatment of disease in susceptible individuals. Therapeutic strategies toward controlled transient activation of telomerase are targeted to cells and replicative potential in cell-based therapies, tissue engineering and regenerative medicine.
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Affiliation(s)
- Mark A Babizhayev
- Innovative Vision Products, Inc., 3511 Silverside Road, Suite 105, County of New Castle, Delaware, 19810
| | - Yegor E Yegorov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 32 Vavilov Street, Moscow, 119991, Russian Federation
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Gupta KP, Dholaniya PS, Chekuri A, Kondapi AK. Analysis of gene expression during aging of CGNs in culture: implication of SLIT2 and NPY in senescence. AGE (DORDRECHT, NETHERLANDS) 2015; 37:62. [PMID: 26047956 PMCID: PMC4493715 DOI: 10.1007/s11357-015-9789-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 04/27/2015] [Indexed: 06/04/2023]
Abstract
Senescence is the major key factor that leads to the loss of neurons throughout aging. Cellular senescence is not the consequence of single cause, but there are multiple aspects which may induce senescence in a cell. Various causes such as gene expression, molecular interactions and protein processing and chromatin organization are described as causal factor for senescence. It is well known that the damage to the nuclear or mitochondrial DNA contributes to the aging either directly by inducing the apoptosis/cellular senescence or indirectly by altering cellular functions. The significant nuclear DNA damage with the age is directly associated with the continuous declining in DNA repair. The continuous decline in expression of topoisomerase 2 beta (Topo IIβ) in cultured cerebellar granule neurons over time indicated the decline in the repair of damage DNA. DNA Topo IIβ is an enzyme that is crucial for solving topological problems of DNA and thus has an important role in DNA repair. The enzyme is predominantly present in non-proliferating cells such as neurons. In this paper, we have studied the genes which were differentially expressed over time in cultured cerebellar granule neurons (CGNs) and identified potential genes associated with the senescence. Our results showed that the two genes neuropeptide Y (Npy) and Slit homolog 2 (Drosophila) (Slit2) gradually increase during aging, and upon suppression of these two genes, there was gradual increase in cell viability along with restoration of the expression of Topo IIβ and potential repair proteins.
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Affiliation(s)
- K. Preeti Gupta
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad, 500046 Andhra Pradesh India
| | - Pankaj Singh Dholaniya
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad, 500046 Andhra Pradesh India
| | - Anil Chekuri
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad, 500046 Andhra Pradesh India
| | - Anand K. Kondapi
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad, 500046 Andhra Pradesh India
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Yang HH, Zhang H, Son JK, Kim JR. Inhibitory effects of quercetagetin 3,4'-dimethyl ether purified from Inula japonica on cellular senescence in human umbilical vein endothelial cells. Arch Pharm Res 2015; 38:1857-64. [PMID: 25716429 DOI: 10.1007/s12272-015-0577-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 02/17/2015] [Indexed: 11/30/2022]
Abstract
Cellular senescence contributes to tissue and organismal aging, tumor suppression and progress, tissue repair and regeneration, and age-related diseases. Thus, aging intervention might be beneficial for treatment and prevention of diverse age-related diseases. In the present study, we investigated whether four compounds purified from Inula japonica exert inhibitory activity against cellular senescence induced by adriamycin in human umbilical vein endothelial cells (HUVECs). Among them, compound 4 (quercetagetin 3,4'-dimethyl ether) showed inhibitory activity against cellular senescence, which was confirmed by senescence-associated β-galactosidase (SA-β-gal) activity, p53 and p21 protein levels, and intracellular ROS levels. Compound 4 also reduced SA-β-gal activity in HUVECs under replicative senescence. These results suggest that compound 4 represses cellular senescence in HUVECs and might be useful for the development of dietary supplements or cosmetics that alleviate tissue aging or age-related diseases.
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Affiliation(s)
- Hyo Hyun Yang
- Department of Biochemistry and Molecular Biology, College of Medicine, Yeungnam University, Daegu, 705-717, Republic of Korea.,Aging-Associated Vascular Disease Research Center, College of Medicine, Yeungnam University, Daegu, 705-717, Republic of Korea
| | - Haiyan Zhang
- College of Pharmacy, Yeungnam University, Gyongsan, 712-749, Republic of Korea
| | - Jong-Keun Son
- College of Pharmacy, Yeungnam University, Gyongsan, 712-749, Republic of Korea
| | - Jae-Ryong Kim
- Department of Biochemistry and Molecular Biology, College of Medicine, Yeungnam University, Daegu, 705-717, Republic of Korea. .,Aging-Associated Vascular Disease Research Center, College of Medicine, Yeungnam University, Daegu, 705-717, Republic of Korea.
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Cellular senescence: a hitchhiker’s guide. Hum Cell 2015; 28:51-64. [DOI: 10.1007/s13577-015-0110-x] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Accepted: 02/03/2015] [Indexed: 12/21/2022]
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Comparative expression profiling of insulin-like growth factor binding protein-5 in milk of Bos indicus and Bubalus bubalis during lactation. Animal 2015; 9:643-9. [DOI: 10.1017/s1751731114002985] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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35
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The senescent hepatocyte gene signature in chronic liver disease. Exp Gerontol 2014; 60:37-45. [DOI: 10.1016/j.exger.2014.09.011] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 09/10/2014] [Accepted: 09/16/2014] [Indexed: 12/25/2022]
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Li Z, Dang J, Chang KY, Rana TM. MicroRNA-mediated regulation of extracellular matrix formation modulates somatic cell reprogramming. RNA (NEW YORK, N.Y.) 2014; 20:1900-1915. [PMID: 25336587 PMCID: PMC4238355 DOI: 10.1261/rna.043745.113] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 08/27/2014] [Indexed: 06/04/2023]
Abstract
Somatic cells can be reprogrammed to reach an embryonic stem cell-like state by overexpression of defined factors. Recent studies have greatly improved the efficiency of the reprogramming process but the underlying mechanisms regulating the transition from a somatic to a pluripotent state are still relatively unknown. MicroRNAs (miRs) are small noncoding RNAs that primarily regulate target gene expression post-transcriptionally. Here we present a systematic and comprehensive study of microRNAs in mouse embryonic fibroblasts (MEFs) during the early stage of cell fate decisions and reprogramming to a pluripotent state, in which significant transcriptional and epigenetic changes occur. One microRNA found to be highly induced during this stage of reprogramming, miR-135b, targeted the expression of extracellular matrix (ECM) genes including Wisp1 and Igfbp5. Wisp1 was shown to be a key regulator of additional ECM genes that serve as barriers to reprogramming. Regulation of Wisp 1 is likely mediated through biglycan, a glycoprotein highly expressed in MEFs that is silenced in reprogrammed cells. Collectively, this report reveals a novel link between microRNA-mediated regulation of ECM formation and somatic cell reprogramming, and demonstrates that microRNAs are powerful tools to dissect the intracellular and extracellular molecular mechanisms of reprogramming.
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Affiliation(s)
- Zhonghan Li
- Program for RNA Biology, Sanford-Burnham Medical Research Institute, La Jolla, California 92037, USA
| | - Jason Dang
- Program for RNA Biology, Sanford-Burnham Medical Research Institute, La Jolla, California 92037, USA Department of Bioengineering, University of California San Diego, La Jolla, California 92093, USA
| | - Kung-Yen Chang
- Program for RNA Biology, Sanford-Burnham Medical Research Institute, La Jolla, California 92037, USA Department of Pediatrics, University of California San Diego School of Medicine, La Jolla, California 92093, USA
| | - Tariq M Rana
- Program for RNA Biology, Sanford-Burnham Medical Research Institute, La Jolla, California 92037, USA Department of Pediatrics, University of California San Diego School of Medicine, La Jolla, California 92093, USA
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Garrison SR, Stucky CL. Contribution of transient receptor potential ankyrin 1 to chronic pain in aged mice with complete Freund's adjuvant-induced arthritis. Arthritis Rheumatol 2014; 66:2380-90. [PMID: 24891324 DOI: 10.1002/art.38724] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Accepted: 05/22/2014] [Indexed: 12/20/2022]
Abstract
OBJECTIVE To investigate age-related differences in mechanical sensitivity to inflammatory pain and determine the contribution of transient receptor potential ankyrin 1 (TRPA1) to mechanical hypersensitivity during chronic inflammation in young and aged mice with complete Freund's adjuvant (CFA)-induced arthritis. METHODS Mechanical sensitivity in young (3-month-old) and aged (24-month-old) wild-type (TRPA1(+/+) ) mice and TRPA1-deficient (TRPA1(-/-) ) mice was measured behaviorally for 8 weeks following injection of CFA into the plantar hind paw. The severity of inflammation was evaluated by histologic analyses and hind-paw measurements. Ex vivo preparations of the skin saphenous nerve from mice were assessed for C-fiber sensitivity. RESULTS Among naive (uninjured) wild-type mice, aged animals were less sensitive than young animals to mechanical stimuli. Afferent recordings of C-fibers from TRPA1(-/-) mice indicated that TRPA1 contributes to the normal mechanical sensitivity in both age groups. Following injection of CFA, both young and aged TRPA1(+/+) mice exhibited mechanical hypersensitivity. In young TRPA1(-/-) mice injected with CFA, peak development of mechanical hypersensitivity was delayed until week 4, when they exhibited a sharp decrease (9-fold) in the mechanical paw withdrawal threshold, whereas aged TRPA1(-/-) mice did not exhibit mechanical hypersensitivity at any time during the 8 weeks after CFA injection. Recordings of C-fibers from the saphenous nerve supported these findings, with results indicating that both young and aged TRPA1(+/+) mice exhibited increased action potential firing at 8 weeks after CFA injection (increases of 25% and 60%, respectively). Interestingly, among TRPA1(-/-) mice injected with CFA, mechanical firing was increased markedly in the C-fibers of young mice (increase of 80%) but not in the C-fibers of aged mice. CONCLUSION These findings reveal marked differences in the long-term mechanical behavioral sensitivity of aged and young mice, and suggest that TRPA1 may be a key contributor to the transition from acute to chronic inflammatory pain in response to mechanical stimuli as well as to the development of nociceptor sensitization selectively in aged mice.
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Yang HH, Hwangbo K, Zheng MS, Cho JH, Son JK, Kim HY, Baek SH, Choi HC, Park SY, Kim JR. Quercetin-3-O-β-d-glucuronide isolated from Polygonum aviculare inhibits cellular senescence in human primary cells. Arch Pharm Res 2014; 37:1219-33. [DOI: 10.1007/s12272-014-0344-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 01/23/2014] [Indexed: 01/08/2023]
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Antitumor activity and immunogenicity of recombinant vaccinia virus expressing HPV 16 E7 protein SigE7LAMP is enhanced by high-level coexpression of IGFBP-3. Cancer Gene Ther 2014; 21:115-25. [PMID: 24556712 DOI: 10.1038/cgt.2014.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 01/31/2014] [Accepted: 01/31/2014] [Indexed: 01/21/2023]
Abstract
We constructed recombinant vaccinia viruses (VACVs) coexpressing the insulin-like growth factor-binding protein-3 (IGFBP-3) gene and the fusion gene encoding the SigE7Lamp antigen. The expression of the IGFBP-3 transgene was regulated either by the early H5 promoter or by the synthetic early/late (E/L) promoter. We have shown that IGFBP-3 expression regulated by the H5 promoter yielded higher amount of IGFBP-3 protein when compared with the E/L promoter. The immunization with P13-SigE7Lamp-H5-IGFBP-3 virus was more effective in inhibiting the growth of TC-1 tumors in mice and elicited higher T-cell response against VACV-encoded antigen than the P13-SigE7Lamp-TK(-) control virus. We found that high-level production of IGFBP-3 enhanced virus replication both in vitro and in vivo, resulting in more profound antigen stimulation. Production of IGFBP-3 was associated with a higher adsorption rate of P13-SigE7Lamp-H5-IGFBP-3 to CV-1 cells when compared with P13-SigE7Lamp-TK(-). Intracellular mature virions (IMVs) of the IGFBP-3-expressing virus P13-SigE7Lamp-H5-IGFBP-3 have two structural differences: they incorporate the IGFBP-3 protein and they have elevated phosphatidylserine (PS) exposure on outer membrane that could result in increased uptake of IMVs by macropinocytosis. The IMV PS content was measured by flow cytometry using microbeads covered with immobilized purified VACV virions.
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Yang HH, Hwangbo K, Zheng MS, Son JK, Kim HY, Baek SH, Choi HC, Park SY, Kim JR. Inhibitory effects of juglanin on cellular senescence in human dermal fibroblasts. J Nat Med 2014; 68:473-80. [DOI: 10.1007/s11418-014-0817-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Accepted: 01/09/2014] [Indexed: 10/25/2022]
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Bhise NS, Wahlin KJ, Zack DJ, Green JJ. Evaluating the potential of poly(beta-amino ester) nanoparticles for reprogramming human fibroblasts to become induced pluripotent stem cells. Int J Nanomedicine 2013; 8:4641-58. [PMID: 24348039 PMCID: PMC3857166 DOI: 10.2147/ijn.s53830] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Gene delivery can potentially be used as a therapeutic for treating genetic diseases, including neurodegenerative diseases, as well as an enabling technology for regenerative medicine. A central challenge in many gene delivery applications is having a safe and effective delivery method. We evaluated the use of a biodegradable poly(beta-amino ester) nanoparticle-based nonviral protocol and compared this with an electroporation-based approach to deliver episomal plasmids encoding reprogramming factors for generation of human induced pluripotent stem cells (hiPSCs) from human fibroblasts. Methods A polymer library was screened to identify the polymers most promising for gene delivery to human fibroblasts. Feeder-independent culturing protocols were developed for nanoparticle-based and electroporation-based reprogramming. The cells reprogrammed by both polymeric nanoparticle-based and electroporation-based nonviral methods were characterized by analysis of pluripotency markers and karyotypic stability. The hiPSC-like cells were further differentiated toward the neural lineage to test their potential for neurodegenerative retinal disease modeling. Results 1-(3-aminopropyl)-4-methylpiperazine end-terminated poly(1,4-butanediol diacry-late-co-4-amino-1-butanol) polymer (B4S4E7) self-assembled with plasmid DNA to form nanoparticles that were more effective than leading commercially available reagents, including Lipofectamine® 2000, FuGENE® HD, and 25 kDa branched polyethylenimine, for nonviral gene transfer. B4S4E7 nanoparticles showed effective gene delivery to IMR-90 human primary fibroblasts and to dermal fibroblasts derived from a patient with retinitis pigmentosa, and enabled coexpression of exogenously delivered genes, as is needed for reprogramming. The karyotypically normal hiPSC-like cells generated by conventional electroporation, but not by poly(beta-amino ester) reprogramming, could be differentiated toward the neuronal lineage, specifically pseudostratified optic cups. Conclusion This study shows that certain nonviral reprogramming methods may not necessarily be safer than viral approaches and that maximizing exogenous gene expression of reprogramming factors is not sufficient to ensure successful reprogramming.
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Affiliation(s)
- Nupura S Bhise
- Department of Biomedical Engineering, Translational Tissue Engineering Center, and Institute for Nanobiotechnology, Baltimore, MD, USA
| | - Karl J Wahlin
- Department of Ophthalmology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Donald J Zack
- Department of Ophthalmology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA ; Solomon H Snyder Department of Neuroscience, Department of Molecular Biology and Genetics, and Institute of Genetic Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA ; Institut de la Vision, Paris, France
| | - Jordan J Green
- Department of Biomedical Engineering, Translational Tissue Engineering Center, and Institute for Nanobiotechnology, Baltimore, MD, USA ; Department of Ophthalmology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
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Roh SS, Park SB, Park SM, Choi BW, Lee MH, Hwang YL, Kim CH, Jeong HA, Kim CD, Lee JH. A Novel Compound Rasatiol Isolated from Raphanus sativus Has a Potential to Enhance Extracellular Matrix Synthesis in Dermal Fibroblasts. Ann Dermatol 2013; 25:315-20. [PMID: 24003274 PMCID: PMC3756196 DOI: 10.5021/ad.2013.25.3.315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 07/19/2012] [Accepted: 07/28/2012] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND The fibrous proteins of extracellular matrix (ECM) produced by dermal fibroblast contributes to the maintenance of connective tissue integrity. OBJECTIVE This study is carried out to identify the bioactive ingredient from natural products that enhances ECM production in dermal fibroblasts. METHODS Bioassay-directed fractionation was used to isolate the active ingredient from natural extracts. The effects of rasatiol (isolated from Raphanus sativus) on ECM production in primary cultured human dermal fibroblasts was investigated by enzyme linked immunosorbent assay and western blot analysis. RESULTS Rasatiol accelerated fibroblast growth in a dose-dependent manner and increased the production of type 1 collagen, fibronectin and elastin. Phosphorylation of p42/44 extracellular signal-regulated kinase, p38 mitogen-activated protein kinase, and Akt was remarkably increased by rasatiol, indicating that enhanced ECM production is linked to the activation of intracellular signaling cascades. CONCLUSION These results indicate that rasatiol stimulates the fibrous components of ECM production, and may be applied to the maintenance of skin texture.
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Affiliation(s)
- Seok-Seon Roh
- Department of Dermatology and Research Institute for Medical Sciences, School of Medicine, Chungnam National University, Daejeon, Korea
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Yamada T, Park CS, Lacorazza HD. Genetic control of quiescence in hematopoietic stem cells. Cell Cycle 2013; 12:2376-83. [PMID: 23839041 PMCID: PMC3841317 DOI: 10.4161/cc.25416] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Revised: 06/13/2013] [Accepted: 06/14/2013] [Indexed: 01/08/2023] Open
Abstract
Cellular quiescence is a reversible cell cycle arrest that is poised to re-enter the cell cycle in response to a combination of cell-intrinsic factors and environmental cues. In hematopoietic stem cells, a coordinated balance between quiescence and differentiating proliferation ensures longevity and prevents both genetic damage and stem cell exhaustion. However, little is known about how all these processes are integrated at the molecular level. We will briefly review the environmental and intrinsic control of stem cell quiescence and discuss a new model that involves a protein-to-protein interaction between G0S2 and the phospho-nucleoprotein nucleolin in the cytosol.
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Affiliation(s)
- Takeshi Yamada
- Department of Pathology & Immunology; Baylor College of Medicine; Texas Children’s Hospital; Houston, TX USA
| | - Chun Shik Park
- Department of Pathology & Immunology; Baylor College of Medicine; Texas Children’s Hospital; Houston, TX USA
| | - H Daniel Lacorazza
- Department of Pathology & Immunology; Baylor College of Medicine; Texas Children’s Hospital; Houston, TX USA
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Li M, Durbin KR, Sweet SMM, Tipton JD, Zheng Y, Kelleher NL. Oncogene-induced cellular senescence elicits an anti-Warburg effect. Proteomics 2013; 13:2585-96. [PMID: 23798001 DOI: 10.1002/pmic.201200298] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Revised: 05/04/2013] [Accepted: 06/12/2013] [Indexed: 11/06/2022]
Abstract
Cellular senescence, an irreversible cell cycle arrest induced by a diversity of stimuli, has been considered as an innate tumor suppressing mechanism with implications and applications in cancer therapy. Using a targeted proteomics approach, we show that fibroblasts induced into senescence by expression of oncogenic Ras exhibit a decrease of global acetylation on all core histones, consistent with formation of senescence-associated heterochromatic foci. We also detected clear increases in repressive markers (e.g. >50% elevation of H3K27me2/3) along with decreases in histone marks associated with increased transcriptional expression/elongation (e.g. H3K36me2/3). Despite the increases in repressive marks of chromatin, 179 loci (of 2206 total) were found to be upregulated by global quantitative proteomics. The changes in the cytosolic proteome indicated an upregulation of mitochondrial proteins and downregulation of proteins involved in glycolysis. These alterations in primary metabolism are opposite to the well-known Warburg effect observed in cancer cells. This study significantly improves our understanding of stress-induced senescence and provides a potential application for triggering it in antiproliferative strategies that target the primary metabolism in cancer cells.
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Affiliation(s)
- Mingxi Li
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL, USA; Department of Molecular Biosciences, Northwestern University, Evanston, IL, USA
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Zhang M, Song F, Liang L, Nan H, Zhang J, Liu H, Wang LE, Wei Q, Lee JE, Amos CI, Kraft P, Qureshi AA, Han J. Genome-wide association studies identify several new loci associated with pigmentation traits and skin cancer risk in European Americans. Hum Mol Genet 2013; 22:2948-59. [PMID: 23548203 DOI: 10.1093/hmg/ddt142] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Aiming to identify novel genetic loci for pigmentation and skin cancer, we conducted a series of genome-wide association studies on hair color, eye color, number of sunburns, tanning ability and number of non-melanoma skin cancers (NMSCs) among 10 183 European Americans in the discovery stage and 4504 European Americans in the replication stage (for eye color, 3871 males in the discovery stage and 2496 males in the replication stage). We targeted novel chromosome regions besides the known ones for replication. As a result, we identified a new region downstream of the EDNRB gene on 13q22 associated with hair color and the strongest association was the single-nucleotide polymorphism (SNP) rs975739 (P = 2.4 × 10(-14); P = 5.4 × 10(-9) in the discovery set and P = 1.2 × 10(-6) in the replication set). Using blue, intermediate (including green) and brown eye colors as co-dominant outcomes, we identified the SNP rs3002288 in VASH2 on 1q32.3 associated with brown eye (P = 7.0 × 10(-8); P = 5.3 × 10(-5) in the discovery set and P = 0.02 in the replication set). Additionally, we identified a significant interaction between the SNPs rs7173419 and rs12913832 in the OCA2 gene region on brown eye color (P-value for interaction = 3.8 × 10(-3)). As for the number of NMSCs, we identified two independent SNPs on chr6 and one SNP on chromosome 14: rs12203592 in IRF4 (P = 7.2 × 10(-14); P = 1.8 × 10(-8) in the discovery set and P = 6.7 × 10(-7) in the replication set), rs12202284 between IRF4 and EXOC2 (P = 5.0 × 10(-8); P = 6.6 × 10(-7) in the discovery set and P = 3.0 × 10(-3) in the replication set) and rs8015138 upstream of GNG2 (P = 6.6 × 10(-8); P = 5.3 × 10(-7) in the discovery set and P = 0.01 in the replication set).
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Affiliation(s)
- Mingfeng Zhang
- Clinical Research Program, Department of Dermatology, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
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Gamma-tocotrienol modulated gene expression in senescent human diploid fibroblasts as revealed by microarray analysis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:454328. [PMID: 23634235 PMCID: PMC3619550 DOI: 10.1155/2013/454328] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Revised: 02/13/2013] [Accepted: 02/13/2013] [Indexed: 11/24/2022]
Abstract
The effect of γ-tocotrienol, a vitamin E isomer, in modulating gene expression in cellular aging of human diploid fibroblasts was studied. Senescent cells at passage 30 were incubated with 70 μM of γ-tocotrienol for 24 h. Gene expression patterns were evaluated using Sentrix HumanRef-8 Expression BeadChip from Illumina, analysed using GeneSpring GX10 software, and validated using quantitative RT-PCR. A total of 100 genes were differentially expressed (P < 0.001) by at least 1.5 fold in response to γ-tocotrienol treatment. Amongst the genes were IRAK3, SelS, HSPA5, HERPUD1, DNAJB9, SEPR1, C18orf55, ARF4, RINT1, NXT1, CADPS2, COG6, and GLRX5. Significant gene list was further analysed by Gene Set Enrichment Analysis (GSEA), and the Normalized Enrichment Score (NES) showed that biological processes such as inflammation, protein transport, apoptosis, and cell redox homeostasis were modulated in senescent fibroblasts treated with γ-tocotrienol. These findings revealed that γ-tocotrienol may prevent cellular aging of human diploid fibroblasts by modulating gene expression.
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Debacq-Chainiaux F, Leduc C, Verbeke A, Toussaint O. UV, stress and aging. DERMATO-ENDOCRINOLOGY 2013; 4:236-40. [PMID: 23467762 PMCID: PMC3583883 DOI: 10.4161/derm.23652] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Skin is a model of choice in studies on aging. Indeed, skin aging can be modulated by internal and external factors, reflecting its complexity. Two types of skin aging have been identified: intrinsic, mainly genetically determined and extrinsic—also called "photo-aging"—resulting on the impact of environmental stress and more precisely of UV rays. Simplified in vitro models, based on cellular senescence, have been developed to study the relationship between UV and aging. These models vary on the cell type (fibroblasts or keratinocytes, normal or immortalized) and the type of UV used (UVA or UVB).
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Veraldi KL, Feghali-Bostwick CA. Insulin-like growth factor binding proteins-3 and -5: central mediators of fibrosis and promising new therapeutic targets. Open Rheumatol J 2012; 6:140-5. [PMID: 22802912 PMCID: PMC3395973 DOI: 10.2174/1874312901206010140] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2012] [Revised: 03/27/2012] [Accepted: 04/04/2012] [Indexed: 12/22/2022] Open
Abstract
Fibrosis involves an orchestrated cascade of events including activation of fibroblasts, increased production and deposition of extracellular matrix components, and differentiation of fibroblasts into myofibroblasts. Epithelial-mesenchymal cross-talk plays an important role in this process, and current hypotheses of organ fibrosis liken it to an aberrant wound healing response in which epithelial-mesenchymal transition (EMT) and cellular senescence may also contribute to disease pathogenesis. The fibrotic response is associated with altered expression of growth factors and cytokines, including increased levels of transforming growth factor-β1 (TGF-β1) and the more recent observation that increased levels of several insulin-like growth factor binding proteins (IGFBPs) are associated with a number of fibrotic conditions. IGFBPs have been implicated in virtually every cell type and process associated with the fibrotic response, making the IGFBPs attractive targets for the development of novel anti-fibrotic therapies. In this review, the current state of knowledge regarding the classical IGFBP family in organ fibrosis will be summarized and the clinical implications considered.
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Affiliation(s)
- Kristen L Veraldi
- The Division of Pulmonary, Allergy, and Critical Care Medicine, and Pittsburgh Scleroderma Center, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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Yamada T, Park CS, Burns A, Nakada D, Lacorazza HD. The cytosolic protein G0S2 maintains quiescence in hematopoietic stem cells. PLoS One 2012; 7:e38280. [PMID: 22693613 PMCID: PMC3365016 DOI: 10.1371/journal.pone.0038280] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 05/02/2012] [Indexed: 02/06/2023] Open
Abstract
Bone marrow hematopoietic stem cells (HSCs) balance proliferation and differentiation by integrating complex transcriptional and post-translational mechanisms regulated by cell intrinsic and extrinsic factors. We found that transcripts of G(0)/G(1) switch gene 2 (G0S2) are enriched in lineage(-) Sca-1(+) c-kit(+) (LSK) CD150(+) CD48(-) CD41(-) cells, a population highly enriched for quiescent HSCs, whereas G0S2 expression is suppressed in dividing LSK CD150(+) CD48(-) cells. Gain-of-function analyses using retroviral expression vectors in bone marrow cells showed that G0S2 localizes to the mitochondria, endoplasmic reticulum, and early endosomes in hematopoietic cells. Co-transplantation of bone marrow cells transduced with the control or G0S2 retrovirus led to increased chimerism of G0S2-overexpressing cells in femurs, although their contribution to the blood was reduced. This finding was correlated with increased quiescence in G0S2-overexpressing HSCs (LSK CD150(+) CD48(-)) and progenitor cells (LS(-)K). Conversely, silencing of endogenous G0S2 expression in bone marrow cells increased blood chimerism upon transplantation and promoted HSC cell division, supporting an inhibitory role for G0S2 in HSC proliferation. A proteomic study revealed that the hydrophobic domain of G0S2 interacts with a domain of nucleolin that is rich in arginine-glycine-glycine repeats, which results in the retention of nucleolin in the cytosol. We showed that this cytosolic retention of nucleolin occurs in resting, but not proliferating, wild-type LSK CD150(+) CD48(-) cells. Collectively, we propose a novel model of HSC quiescence in which elevated G0S2 expression can sequester nucleolin in the cytosol, precluding its pro-proliferation functions in the nucleolus.
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Affiliation(s)
- Takeshi Yamada
- Department of Pathology & Immunology, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, United States of America
| | - Chun Shik Park
- Department of Pathology & Immunology, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, United States of America
| | - Audrea Burns
- Department of Pathology & Immunology, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, United States of America
| | - Daisuke Nakada
- Department of Molecular and Human Genetics, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, United States of America
| | - H. Daniel Lacorazza
- Department of Pathology & Immunology, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, United States of America
- Department of Pediatrics, Baylor College of Medicine, Texas Children's Hospital, Houston, Texas, United States of America
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Interferon-β induces cellular senescence in cutaneous human papilloma virus-transformed human keratinocytes by affecting p53 transactivating activity. PLoS One 2012; 7:e36909. [PMID: 22615843 PMCID: PMC3353995 DOI: 10.1371/journal.pone.0036909] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Accepted: 04/10/2012] [Indexed: 11/19/2022] Open
Abstract
Interferon (IFN)-β inhibits cell proliferation and affects cell cycle in keratinocytes transformed by both mucosal high risk Human Papilloma Virus (HPV) and cutaneous HPV E6 and E7 proteins. In particular, upon longer IFN-β treatments, cutaneous HPV38 expressing cells undergo senescence. IFN-β appears to induce senescence by upregulating the expression of the tumor suppressor PML, a well known IFN-induced gene. Indeed, experiments in gene silencing via specific siRNAs have shown that PML is essential in the execution of the senescence programme and that both p53 and p21 pathways are involved. IFN-β treatment leads to a modulation of p53 phosphorylation and acetylation status and a reduction in the expression of the p53 dominant negative ΔNp73. These effects allow the recovery of p53 transactivating activity of target genes involved in the control of cell proliferation. Taken together, these studies suggest that signaling through the IFN pathway might play an important role in cellular senescence. This additional understanding of IFN antitumor action and mechanisms influencing tumor responsiveness or resistance appears useful in aiding further promising development of biomolecular strategies in the IFN therapy of cancer.
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