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Salminen A, Kaarniranta K, Kauppinen A. Tissue fibroblasts are versatile immune regulators: An evaluation of their impact on the aging process. Ageing Res Rev 2024; 97:102296. [PMID: 38588867 DOI: 10.1016/j.arr.2024.102296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 03/26/2024] [Accepted: 04/03/2024] [Indexed: 04/10/2024]
Abstract
Fibroblasts are abundant stromal cells which not only control the integrity of extracellular matrix (ECM) but also act as immune regulators. It is known that the structural cells within tissues can establish an organ-specific immunity expressing many immune-related genes and closely interact with immune cells. In fact, fibroblasts can modify their immune properties to display both pro-inflammatory and immunosuppressive activities in a context-dependent manner. After acute insults, fibroblasts promote tissue inflammation although they concurrently recruit immunosuppressive cells to enhance the resolution of inflammation. In chronic pathological states, tissue fibroblasts, especially senescent fibroblasts, can display many pro-inflammatory and immunosuppressive properties and stimulate the activities of different immunosuppressive cells. In return, immunosuppressive cells, such as M2 macrophages and myeloid-derived suppressor cells (MDSC), evoke an excessive conversion of fibroblasts into myofibroblasts, thus aggravating the severity of tissue fibrosis. Single-cell transcriptome studies on fibroblasts isolated from aged tissues have confirmed that tissue fibroblasts express many genes coding for cytokines, chemokines, and complement factors, whereas they lose some fibrogenic properties. The versatile immune properties of fibroblasts and their close cooperation with immune cells indicate that tissue fibroblasts have a crucial role in the aging process and age-related diseases.
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Affiliation(s)
- Antero Salminen
- Department of Neurology, Institute of Clinical Medicine, University of Eastern Finland, P.O. Box 1627, Kuopio FI-70211, Finland.
| | - Kai Kaarniranta
- Department of Ophthalmology, Institute of Clinical Medicine, University of Eastern Finland, P.O. Box 1627, Kuopio FI-70211, Finland; Department of Ophthalmology, Kuopio University Hospital, P.O. Box 100, KYS FI-70029, Finland
| | - Anu Kauppinen
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, P.O. Box 1627, Kuopio FI-70211, Finland
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Huynh DC, Nguyen MP, Ngo DT, Nguyen XH, Nguyen DT, Mai TH, Le TH, Hoang MD, Le KL, Nguyen KQ, Nguyen VH, Kelley KW. A comprehensive analysis of the immune system in healthy Vietnamese people. Heliyon 2024; 10:e30647. [PMID: 38765090 PMCID: PMC11101793 DOI: 10.1016/j.heliyon.2024.e30647] [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] [Received: 03/12/2024] [Revised: 04/21/2024] [Accepted: 05/01/2024] [Indexed: 05/21/2024] Open
Abstract
Lifestyle, diet, socioeconomic status and genetics all contribute to heterogeneity in immune responses. Vietnam is plagued with a variety of health problems, but there are no available data on immune system values in the Vietnamese population. This study aimed to establish reference intervals for immune cell parameters specific to the healthy Vietnamese population by utilizing multi-color flow cytometry (MCFC). We provide a comprehensive analysis of total leukocyte count, quantitative and qualitative shifts within lymphocyte subsets, serum and cytokine and chemokine levels and functional attributes of key immune cells including B cells, T cells, natural killer (NK) cells and their respective subpopulations. By establishing these reference values for the Vietnamese population, these data contribute significantly to our understanding of the human immune system variations across diverse populations. These data will be of substantial comparative value and be instrumental in developing personalized medical approaches and optimizing diagnostic strategies for individuals based on their unique immune profiles.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Keith W Kelley
- University of Illinois at Urbana-Champaign, Urbana, IL, USA
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3
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Therapeutic Antiaging Strategies. Biomedicines 2022; 10:biomedicines10102515. [PMID: 36289777 PMCID: PMC9599338 DOI: 10.3390/biomedicines10102515] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 09/21/2022] [Accepted: 09/24/2022] [Indexed: 11/17/2022] Open
Abstract
Aging constitutes progressive physiological changes in an organism. These changes alter the normal biological functions, such as the ability to manage metabolic stress, and eventually lead to cellular senescence. The process itself is characterized by nine hallmarks: genomic instability, telomere attrition, epigenetic alterations, loss of proteostasis, deregulated nutrient sensing, mitochondrial dysfunction, cellular senescence, stem cell exhaustion, and altered intercellular communication. These hallmarks are risk factors for pathologies, such as cardiovascular diseases, neurodegenerative diseases, and cancer. Emerging evidence has been focused on examining the genetic pathways and biological processes in organisms surrounding these nine hallmarks. From here, the therapeutic approaches can be addressed in hopes of slowing the progression of aging. In this review, data have been collected on the hallmarks and their relative contributions to aging and supplemented with in vitro and in vivo antiaging research experiments. It is the intention of this article to highlight the most important antiaging strategies that researchers have proposed, including preventive measures, systemic therapeutic agents, and invasive procedures, that will promote healthy aging and increase human life expectancy with decreased side effects.
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Kosyreva AM, Sentyabreva AV, Tsvetkov IS, Makarova OV. Alzheimer’s Disease and Inflammaging. Brain Sci 2022; 12:brainsci12091237. [PMID: 36138973 PMCID: PMC9496782 DOI: 10.3390/brainsci12091237] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/22/2022] [Accepted: 09/10/2022] [Indexed: 11/23/2022] Open
Abstract
Alzheimer’s disease is one of the most common age-related neurodegenerative disorders. The main theory of Alzheimer’s disease progress is the amyloid-β cascade hypothesis. However, the initial mechanisms of insoluble forms of amyloid-β formation and hyperphosphorylated tau protein in neurons remain unclear. One of the factors, which might play a key role in senile plaques and tau fibrils generation due to Alzheimer’s disease, is inflammaging, i.e., systemic chronic low-grade age-related inflammation. The activation of the proinflammatory cell phenotype is observed during aging, which might be one of the pivotal mechanisms for the development of chronic inflammatory diseases, e.g., atherosclerosis, metabolic syndrome, type 2 diabetes mellitus, and Alzheimer’s disease. This review discusses the role of the inflammatory processes in developing neurodegeneration, activated during physiological aging and due to various diseases such as atherosclerosis, obesity, type 2 diabetes mellitus, and depressive disorders.
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Haga M, Okada M. Systems approaches to investigate the role of NF-κB signaling in aging. Biochem J 2022; 479:161-183. [PMID: 35098992 PMCID: PMC8883486 DOI: 10.1042/bcj20210547] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/06/2022] [Accepted: 01/10/2022] [Indexed: 12/14/2022]
Abstract
The nuclear factor-κB (NF-κB) signaling pathway is one of the most well-studied pathways related to inflammation, and its involvement in aging has attracted considerable attention. As aging is a complex phenomenon and is the result of a multi-step process, the involvement of the NF-κB pathway in aging remains unclear. To elucidate the role of NF-κB in the regulation of aging, different systems biology approaches have been employed. A multi-omics data-driven approach can be used to interpret and clarify unknown mechanisms but cannot generate mechanistic regulatory structures alone. In contrast, combining this approach with a mathematical modeling approach can identify the mechanistics of the phenomena of interest. The development of single-cell technologies has also helped clarify the heterogeneity of the NF-κB response and underlying mechanisms. Here, we review advances in the understanding of the regulation of aging by NF-κB by focusing on omics approaches, single-cell analysis, and mathematical modeling of the NF-κB network.
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Affiliation(s)
- Masatoshi Haga
- Laboratory for Cell Systems, Institute for Protein Research, Osaka University, Suita, Osaka 565-0871, Japan
- Basic Research Development Division, ROHTO Pharmaceutical Co., Ltd., Ikuno-ku, Osaka 544-8666, Japan
| | - Mariko Okada
- Laboratory for Cell Systems, Institute for Protein Research, Osaka University, Suita, Osaka 565-0871, Japan
- Center for Drug Design and Research, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Osaka 567-0085, Japan
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Role of NF-κB in Ageing and Age-Related Diseases: Lessons from Genetically Modified Mouse Models. Cells 2021; 10:cells10081906. [PMID: 34440675 PMCID: PMC8394846 DOI: 10.3390/cells10081906] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/17/2021] [Accepted: 07/23/2021] [Indexed: 12/21/2022] Open
Abstract
Ageing is a complex process, induced by multifaceted interaction of genetic, epigenetic, and environmental factors. It is manifested by a decline in the physiological functions of organisms and associated to the development of age-related chronic diseases and cancer development. It is considered that ageing follows a strictly-regulated program, in which some signaling pathways critically contribute to the establishment and maintenance of the aged state. Chronic inflammation is a major mechanism that promotes the biological ageing process and comorbidity, with the transcription factor NF-κB (nuclear factor kappa-light-chain-enhancer of activated B cells) as a crucial mediator of inflammatory responses. This, together with the finding that the activation or inhibition of NF-κB can induce or reverse respectively the main features of aged organisms, has brought it under consideration as a key transcription factor that acts as a driver of ageing. In this review, we focused on the data obtained entirely through the generation of knockout and transgenic mouse models of either protein involved in the NF-κB signaling pathway that have provided relevant information about the intricate processes or molecular mechanisms that control ageing. We have reviewed the relationship of NF-κB and premature ageing; the development of cancer associated with ageing and the implication of NF-κB activation in the development of age-related diseases, some of which greatly increase the risk of developing cancer.
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Thompson SD, Pichika R, Lieber RL, Lavasani M. Systemic transplantation of adult multipotent stem cells prevents articular cartilage degeneration in a mouse model of accelerated ageing. Immun Ageing 2021; 18:27. [PMID: 34098983 PMCID: PMC8183038 DOI: 10.1186/s12979-021-00239-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 05/26/2021] [Indexed: 01/13/2023]
Abstract
BACKGROUND Osteoarthritis (OA) is one of the most prevalent joint diseases of advanced age and is a leading cause of disability worldwide. Ageing is a major risk factor for the articular cartilage (AC) degeneration that leads to OA, and the age-related decline in regenerative capacity accelerates OA progression. Here we demonstrate that systemic transplantation of a unique population of adult multipotent muscle-derived stem/progenitor cells (MDSPCs), isolated from young wild-type mice, into Zmpste24-/- mice (a model of Hutchinson-Gilford progeria syndrome, a condition marked by accelerated ageing), prevents ageing-related homeostatic decline of AC. RESULTS MDSPC treatment inhibited expression of cartilage-degrading factors such as pro-inflammatory cytokines and extracellular matrix-proteinases, whereas pro-regenerative markers associated with cartilage mechanical support and tensile strength, cartilage resilience, chondrocyte proliferation and differentiation, and cartilage growth, were increased. Notably, MDSPC transplantation also increased the expression level of genes known for their key roles in immunomodulation, autophagy, stress resistance, pro-longevity, and telomere protection. Our findings also indicate that MDSPC transplantation increased proteoglycan content by regulating chondrocyte proliferation. CONCLUSIONS Together, these findings demonstrate the ability of systemically transplanted young MDSPCs to preserve a healthy homeostasis and promote tissue regeneration at the molecular and tissue level in progeroid AC. These results highlight the therapeutic potential of systemically delivered multipotent adult stem cells to prevent age-associated AC degeneration.
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Affiliation(s)
- Seth D Thompson
- Shirley Ryan Abilitylab (Formerly the Rehabilitation Institute of Chicago), 355 E. Erie St, IL, 60611, Chicago, USA
- Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, USA
- Northwestern University Interdepartmental Neuroscience (NUIN) Graduate Program, Northwestern University, Chicago, USA
| | - Rajeswari Pichika
- Shirley Ryan Abilitylab (Formerly the Rehabilitation Institute of Chicago), 355 E. Erie St, IL, 60611, Chicago, USA
- Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, USA
| | - Richard L Lieber
- Shirley Ryan Abilitylab (Formerly the Rehabilitation Institute of Chicago), 355 E. Erie St, IL, 60611, Chicago, USA
- Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, USA
| | - Mitra Lavasani
- Shirley Ryan Abilitylab (Formerly the Rehabilitation Institute of Chicago), 355 E. Erie St, IL, 60611, Chicago, USA.
- Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, USA.
- Northwestern University Interdepartmental Neuroscience (NUIN) Graduate Program, Northwestern University, Chicago, USA.
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Cheon SY, Lee JE. Extracellular Vesicles and Immune System in Ageing and Immune Diseases. Exp Neurobiol 2021; 30:32-47. [PMID: 33632983 PMCID: PMC7926047 DOI: 10.5607/en20059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/06/2021] [Accepted: 01/17/2021] [Indexed: 02/06/2023] Open
Abstract
Immune system is essential for host homeostasis. Immune cells communicate with each other by binding to receptors or by releasing vesicles including chemokines and cytokines. Under healthy circumstances, immune cell-derived factors are critical for cellular growth, division and function, whereas under conditions such as ageing and inflammatory states, they can aggravate pathologies and cause disease. Cell-derived membranous extracellular vesicles mediate cell-to-cell communication and are implicated in various physiological and pathological processes involving ageing and age-related diseases. Extracellular vesicles are responsible for spreading detrimental factors to the surroundings and the propagation phase of inflammatory diseases. The regulation of extracellular vesicles is a putative target for treatment of inflammatory diseases. Moreover, their features are ideal for developing biomarkers and drug delivery systems modulated by bioengineering in inflammatory diseases. The present review summarizes the current understanding of extracellular vesicles in ageing and inflammatory diseases.
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Affiliation(s)
- So Yeong Cheon
- Department of Biotechnology, College of Biomedical & Health Science, Konkuk University, Chungju 27478, Korea
| | - Jong Eun Lee
- Department of Anatomy, Yonsei University College of Medicine, Seoul 03722, Korea.,BK21 PLUS Project for Medical Science, and Brain Research Institute, Yonsei University College of Medicine, Seoul 03722, Korea
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Kim TH, Kim JY, Bae J, Kim YM, Won MH, Ha KS, Kwon YG, Kim YM. Korean Red ginseng prevents endothelial senescence by downregulating the HO-1/NF-κB/miRNA-155-5p/eNOS pathway. J Ginseng Res 2020; 45:344-353. [PMID: 33841015 PMCID: PMC8020293 DOI: 10.1016/j.jgr.2020.08.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 07/05/2020] [Accepted: 08/10/2020] [Indexed: 11/30/2022] Open
Abstract
Background Korean Red ginseng extract (KRGE) has beneficial effects on the cardiovascular system by improving endothelial cell function. However, its pharmacological effect on endothelial cell senescence has not been clearly elucidated. Therefore, we examined the effect and molecular mechanism of KRGE on the senescence of human umbilical vein endothelial cells (HUVECs). Methods HUVECs were grown in normal or KRGE-supplemented medium. Furthermore, they were transfected with heme oxygenase-1 (HO-1) gene or treated with its inhibitor, a NF-κB inhibitor, and a miR-155-5p mimic or inhibitor. Senescence-associated characteristics of endothelial cells were determined by biochemical and immunohistochemical analyses. Results Treatment of HUVECs with KRGE resulted in delayed onset and progression of senescence-associated characteristics, such as increased lysosomal acidic β-galactosidase and decreased telomerase activity, angiogenic dysfunction, and abnormal cell morphology. KRGE preserved the levels of anti-senescent factors, such as eNOS-derived NO, MnSOD, and cyclins D and A: however, it decreased the levels of senescence-promoting factors, such as ROS, activated NF-κB, endothelial cell inflammation, and p21 expression. The beneficial effects of KRGE were due to the induction of HO-1 and the inhibition of NF-κB-dependent biogenesis of miR-155-5p that led to the downregulation of eNOS. Moreover, treatment with inhibitors of HO-1, NF-κB, and miR-155-5p abolished the anti-senescence effects of KRGE. Conclusion KRGE delayed or prevented HUVEC senescence through a signaling cascade involving the induction of HO-1, the inhibition of NF-κB-dependent miR-155-5p biogenesis, and the maintenance of the eNOS/NO axis activity, suggesting that it may protect against vascular diseases associated with endothelial senescence.
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Affiliation(s)
- Tae-Hoon Kim
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, Gangwon-do 24341, South Korea
| | - Ji-Yoon Kim
- Department of Anesthesiology and Pain Medicine, Hanyang University Hospital, Seoul, 04763, South Korea
| | - Jieun Bae
- Department of Anesthesiology and Pain Medicine, Hanyang University Hospital, Seoul, 04763, South Korea
| | - Young-Mi Kim
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, Gangwon-do 24341, South Korea
| | - Moo-Ho Won
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, Gangwon-do 24341, South Korea
| | - Kwon-Soo Ha
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, Gangwon-do 24341, South Korea
| | - Young-Guen Kwon
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, South Korea
| | - Young-Myeong Kim
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, Gangwon-do 24341, South Korea
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Yoon SY, Yoon JA, Park M, Shin EY, Jung S, Lee JE, Eum JH, Song H, Lee DR, Lee WS, Lyu SW. Recovery of ovarian function by human embryonic stem cell-derived mesenchymal stem cells in cisplatin-induced premature ovarian failure in mice. Stem Cell Res Ther 2020; 11:255. [PMID: 32586410 PMCID: PMC7318510 DOI: 10.1186/s13287-020-01769-6] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 05/07/2020] [Accepted: 06/11/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Clinical use of mesenchymal stem cells (MSCs) requires a uniform cell population, and their harvesting is invasive and produces a limited number of cells. Human embryonic stem cell-derived MSCs (hESC-MSCs) can differentiate into three germ layers and possess immunosuppressive effects in vitro. Anticancer treatment is a well-known risk factor for premature ovarian failure (POF). In this study, we investigated the effect of hESC-MSC on recovery of ovarian function in cisplatin-induced POF in mice. METHODS Female mice received intraperitoneal cisplatin for 10 days. On day 12, CHA15-derived hESC-MSCs were transplanted into the mice by tail vein injection. An injection of PBS served as the negative control. Ovaries were removed 28 days after transplantation for assessment of ovarian histology, immunostaining, and fertility testing by superovulation and in vitro fertilization. hESC-MSC transplantation into mice with cisplatin-induced damage restored body weight and ovary size. RESULTS Mean primary and primordial follicle counts in the hESC-MSC group were significantly improved compared to the PBS group (P < 0.05), and counts of zona pellucida remnants, an apoptotic sign in ovarian follicles, were significantly reduced (P < 0.05). TUNEL assays and cleaved PARP immunostaining indicated apoptosis, which led to loss of ovarian stromal cells in negative control mice, while Ki-67 was higher in the hESC-MSC group and in non-cisplatin-treated controls than in the PBS group. Ovulation was reduced in the PBS group but recovered significantly in the hESC-MSC group. Rates of blastocyst formation from ovulated eggs and live births per mouse also recovered significantly in the hESC-MSC group. CONCLUSIONS hESC-MSC restored structure and function in the cisplatin-damaged ovary. Our study provides new insights into the great clinical potential of human hESC-MSC in treating POF.
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Affiliation(s)
- Sook Young Yoon
- Fertility Center of CHA Gangnam Medical Center, CHA University, 569 Nonhyun-ro, Gangnam-Gu, Seoul, 06125, South Korea
| | - Jung Ah Yoon
- Fertility Center of CHA Gangnam Medical Center, CHA University, 569 Nonhyun-ro, Gangnam-Gu, Seoul, 06125, South Korea
| | - Mira Park
- Department of Biomedical Science, CHA University, Seongnam-si, South Korea
| | - Eun-Young Shin
- Department of Biomedical Science, CHA University, Seongnam-si, South Korea
| | - Sookyung Jung
- CHA Advanced Research Institute, Seongnam-si, South Korea
| | - Jeoung Eun Lee
- CHA Advanced Research Institute, Seongnam-si, South Korea
| | - Jin Hee Eum
- Fertility Center of CHA Gangnam Medical Center, CHA University, 569 Nonhyun-ro, Gangnam-Gu, Seoul, 06125, South Korea
| | - Haengseok Song
- Department of Biomedical Science, CHA University, Seongnam-si, South Korea
| | - Dong Ryul Lee
- CHA Advanced Research Institute, Seongnam-si, South Korea.,Department of Biomedical Science, CHA University, Seongnam-si, South Korea
| | - Woo Sik Lee
- Fertility Center of CHA Gangnam Medical Center, CHA University, 569 Nonhyun-ro, Gangnam-Gu, Seoul, 06125, South Korea
| | - Sang Woo Lyu
- Fertility Center of CHA Gangnam Medical Center, CHA University, 569 Nonhyun-ro, Gangnam-Gu, Seoul, 06125, South Korea.
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Anti-aging Effects of Calorie Restriction (CR) and CR Mimetics based on the Senoinflammation Concept. Nutrients 2020; 12:nu12020422. [PMID: 32041168 PMCID: PMC7071238 DOI: 10.3390/nu12020422] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/29/2020] [Accepted: 02/03/2020] [Indexed: 12/12/2022] Open
Abstract
Chronic inflammation, a pervasive feature of the aging process, is defined by a continuous, multifarious, low-grade inflammatory response. It is a sustained and systemic phenomenon that aggravates aging and can lead to age-related chronic diseases. In recent years, our understanding of age-related chronic inflammation has advanced through a large number of investigations on aging and calorie restriction (CR). A broader view of age-related inflammation is the concept of senoinflammation, which has an outlook beyond the traditional view, as proposed in our previous work. In this review, we discuss the effects of CR on multiple phases of proinflammatory networks and inflammatory signaling pathways to elucidate the basic mechanism underlying aging. Based on studies on senoinflammation and CR, we recognized that senescence-associated secretory phenotype (SASP), which mainly comprises cytokines and chemokines, was significantly increased during aging, whereas it was suppressed during CR. Further, we recognized that cellular metabolic pathways were also dysregulated in aging; however, CR mimetics reversed these effects. These results further support and enhance our understanding of the novel concept of senoinflammation, which is related to the metabolic changes that occur in the aging process. Furthermore, a thorough elucidation of the effect of CR on senoinflammation will reveal key insights and allow possible interventions in aging mechanisms, thus contributing to the development of new therapies focused on improving health and longevity.
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Rabiee Motmaen S, Tavakol S, Joghataei MT, Barati M. Acidic pH derived from cancer cells as a double-edged knife modulates wound healing through DNA repair genes and autophagy. Int Wound J 2019; 17:137-148. [PMID: 31714008 DOI: 10.1111/iwj.13248] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 09/18/2019] [Accepted: 09/22/2019] [Indexed: 12/16/2022] Open
Abstract
Wound healing is a sequester program that involves diverse cell signalling cascades. Notwithstanding, complete signal transduction pathways underpinning acidic milieu derived from cancer cells is not clear, yet. MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay, fluorescein diacetate/propidium iodide staining, and cell cycle flow cytometry revealed that acidic media decreased cell viability and cell number along with enhanced dead cells and S-phase arrest in normal fibroblasts. Notably, the trends of intracellular reactive oxygen species production and lactate dehydrogenase release significantly increased with time. It seems the downregulation of Klf4 is in part due to acidosis-induced DNA damage. It promoted cells towards S-phase arrest and diminished cell proliferation. Klf4 downregulation had a direct correlation with the P53 level while acidic microenvironment promotes cells towards cell death mechanisms including apoptosis and autophagy. Noteworthily, the unchanged levels of Rb and Mlh1 indicated in those genes had no dominant role in the repairing of DNA damage in fibroblasts treated with the acidic microenvironment. Therefore, cells owing to not entering to mitosis and accumulation of DNA damage were undergone cell death to preserve cell homeostasis. Since acidic media decreased the level of tumour suppressor and DNA repair genes and altered the normal survival pathways in fibroblasts, caution should be exercised to not lead to cancer rather than wound healing.
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Affiliation(s)
| | - Shima Tavakol
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad T Joghataei
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mahmoud Barati
- Department of Medical Biotechnology, Iran University of Medical Sciences, Tehran, Iran
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Ginger ( Zingiber officinale Roscoe) in the Prevention of Ageing and Degenerative Diseases: Review of Current Evidence. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 2019:5054395. [PMID: 31531114 PMCID: PMC6721508 DOI: 10.1155/2019/5054395] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 07/10/2019] [Accepted: 07/24/2019] [Indexed: 12/25/2022]
Abstract
Currently, the age of the population is increasing as a result of increased life expectancy. Ageing is defined as the progressive loss of physiological integrity, which can be characterized by functional impairment and high vulnerability to various types of diseases, such as diabetes, hypertension, Alzheimer's disease (AD), Parkinson's disease (PD), and atherosclerosis. Numerous studies have reported that the presence of oxidative stress and inflammation contributes to the development of these diseases. In general, oxidative stress could induce proinflammatory cytokines and reduce cellular antioxidant capacity. Increased oxidative stress levels beyond the production of antioxidant agents cause oxidative damage to biological molecules, including DNA, protein, and carbohydrates, which affects normal cell signalling, cell growth, differentiation, and apoptosis and leads to disease pathogenesis. Since oxidative stress and inflammation contribute to these diseases, ginger (Zingiber officinale Roscoe) is one of the potential herbs that can be used to reduce the level of oxidative stress and inflammation. Ginger consists of two major active components, 6-gingerol and 6-shogaol, which are essential for preventing oxidative stress and inflammation. Thus, this paper will review the effects of ginger on ageing and degenerative diseases, including AD, PD, type 2 diabetes mellitus (DM), hypertension, and osteoarthritis.
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The impact of the particle size of curcumin nanocarriers and the ethanol on beta_1-integrin overexpression in fibroblasts: A regenerative pharmaceutical approach in skin repair and anti-aging formulations. ACTA ACUST UNITED AC 2019; 27:159-168. [PMID: 30875026 DOI: 10.1007/s40199-019-00258-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Accepted: 03/06/2019] [Indexed: 10/27/2022]
Abstract
BACKGROUND Since women pay more attention to their skin's health, pharmaceutical companies invest heavily on skin care product development. Further, the success of drug nano-carriers in passing through the skin justifies the need to conduct studies at the nano-scale. β1-integrin down regulation has been proposed as a sign of skin aging. METHODS Six drug nano-carriers (50 and 75 nm) were prepared at three ethanol concentrations (0, 3,and 5%) and different temperatures. Then, the impact of Nanocarriers on fibroblasts were investigated. RESULTS DLS showed that increasing ethanol concentration decreased the surface tension that caused a decrease in the particle size in non-temperature formulations while increasing the temperature to 60 °C to lower Gibbs free energy increased the particle size. Ethanol addition decreased β1-integrin over-expression, whereas larger nano-carriers induced an over-expression of β1-integrin, Bcl2/Bax ratio, and an increase in live cell number. β1-integrin over-expression did not correlate with the rate of fibroblast proliferation and NFκB expression. An increase in fibroblast mortality in relation to smaller nano-carriers was not only due to the increase in Bax ratio, but was related to NFκB over-expression. CONCLUSION The development of a regenerative pharmaceutical approach in skin repair was based on the effect of particle size and ethanol concentration of the drug nano-carriers on the expression of β1-integrin in fibroblasts. A curcumin nanoformulation sized 77 nm and containing of 3% ethanol was more effective in increasing β1-integrin gene over-expression, anti-apoptosis of fibroblast cells (Bcl2/Bax ratio), and in decreasing Bax and NFκB gene expression than that with a particle size of 50 nm. Such a formulation may be considered a valuable candidate in anti-aging and wound-healing formulations. Graphical abstract The effect of particle size on Bcl2/Bax ratio and NFκ-B gene expression through the cell surface receptor of ß1- integrin. Bigger nanocarriers induce over-expression of integrin ß1 gene and also lead to an increase in Bcl2/Bax ratio along with a decrease in NFκ-B, unlike the smaller nanocarriers.
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15
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Sivandzade F, Prasad S, Bhalerao A, Cucullo L. NRF2 and NF-қB interplay in cerebrovascular and neurodegenerative disorders: Molecular mechanisms and possible therapeutic approaches. Redox Biol 2019; 21:101059. [PMID: 30576920 PMCID: PMC6302038 DOI: 10.1016/j.redox.2018.11.017] [Citation(s) in RCA: 383] [Impact Index Per Article: 76.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 11/22/2018] [Accepted: 11/23/2018] [Indexed: 12/11/2022] Open
Abstract
Electrophiles and reactive oxygen species (ROS) play a major role in modulating cellular defense mechanisms as well as physiological functions, and intracellular signaling. However, excessive ROS generation (endogenous and exogenous) can create a state of redox imbalance leading to cellular and tissue damage (Ma and He, 2012) [1]. A growing body of research data strongly suggests that imbalanced ROS and electrophile overproduction are among the major prodromal factors in the onset and progression of several cerebrovascular and neurodegenerative disorders such as amyotrophic lateral sclerosis (ALS), stroke, Alzheimer's disease (AD), Parkinson's disease (PD), and aging (Ma and He, 2012; Ramsey et al., 2017; Salminen et al., 2012; Sandberg et al., 2014; Sarlette et al., 2008; Tanji et al., 2013) [1-6]. Cells offset oxidative stress by the action of housekeeping antioxidative enzymes (such as superoxide dismutase, catalase, glutathione peroxidase) as well direct and indirect antioxidants (Dinkova-Kostova and Talalay, 2010) [7]. The DNA sequence responsible for modulating the antioxidative and cytoprotective responses of the cells has been identified as the antioxidant response element (ARE), while the nuclear factor erythroid 2-related factor (NRF2) is the major regulator of the xenobiotic-activated receptor (XAR) responsible for activating the ARE-pathway, thus defined as the NRF2-ARE system (Ma and He, 2012) [1]. In addition, the interplay between the NRF2-ARE system and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-ĸB, a protein complex that controls cytokine production and cell survival), has been further investigated in relation to neurodegenerative and neuroinflammatory disorders. On these premises, we provide a review analysis of current understanding of the NRF2-NF-ĸB interplay, their specific role in major CNS disorders, and consequent therapeutic implication for the treatment of neurodegenerative and cerebrovascular diseases.
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Affiliation(s)
- Farzane Sivandzade
- Department of Pharmaceutical Sciences, Texas Tech University Health Sciences Center, Amarillo, TX 79106, USA.
| | - Shikha Prasad
- Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Aditya Bhalerao
- Department of Pharmaceutical Sciences, Texas Tech University Health Sciences Center, Amarillo, TX 79106, USA.
| | - Luca Cucullo
- Department of Pharmaceutical Sciences, Texas Tech University Health Sciences Center, Amarillo, TX 79106, USA; Center for Blood Brain Barrier Research, Texas Tech University Health Sciences Center, Amarillo, TX 79106, USA.
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16
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Zhou X, Sen I, Lin XX, Riedel CG. Regulation of Age-related Decline by Transcription Factors and Their Crosstalk with the Epigenome. Curr Genomics 2018; 19:464-482. [PMID: 30258277 PMCID: PMC6128382 DOI: 10.2174/1389202919666180503125850] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Revised: 04/20/2018] [Accepted: 04/30/2018] [Indexed: 12/16/2022] Open
Abstract
Aging is a complex phenomenon, where damage accumulation, increasing deregulation of biological pathways, and loss of cellular homeostasis lead to the decline of organismal functions over time. Interestingly, aging is not entirely a stochastic process and progressing at a constant rate, but it is subject to extensive regulation, in the hands of an elaborate and highly interconnected signaling network. This network can integrate a variety of aging-regulatory stimuli, i.e. fertility, nutrient availability, or diverse stresses, and relay them via signaling cascades into gene regulatory events - mostly of genes that confer stress resistance and thus help protect from damage accumulation and homeostasis loss. Transcription factors have long been perceived as the pivotal nodes in this network. Yet, it is well known that the epigenome substantially influences eukaryotic gene regulation, too. A growing body of work has recently underscored the importance of the epigenome also during aging, where it not only undergoes drastic age-dependent changes but also actively influences the aging process. In this review, we introduce the major signaling pathways that regulate age-related decline and discuss the synergy between transcriptional regulation and the epigenetic landscape.
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Affiliation(s)
| | | | | | - Christian G. Riedel
- Address correspondence to this author at the Integrated Cardio Metabolic Centre (ICMC), Department of Biosciences and Nutrition, Karolinska Institutet, Blickagången 6, Novum, 7 floor Huddinge, Stockholm 14157, Sweden; Tel: +46-736707008; E-mail:
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17
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Hawkins KE, Corcelli M, Dowding K, Ranzoni AM, Vlahova F, Hau KL, Hunjan A, Peebles D, Gressens P, Hagberg H, de Coppi P, Hristova M, Guillot PV. Embryonic Stem Cell-Derived Mesenchymal Stem Cells (MSCs) Have a Superior Neuroprotective Capacity Over Fetal MSCs in the Hypoxic-Ischemic Mouse Brain. Stem Cells Transl Med 2018; 7:439-449. [PMID: 29489062 PMCID: PMC5905231 DOI: 10.1002/sctm.17-0260] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 01/16/2018] [Indexed: 12/21/2022] Open
Abstract
Human mesenchymal stem cells (MSCs) have huge potential for regenerative medicine. In particular, the use of pluripotent stem cell‐derived mesenchymal stem cells (PSC‐MSCs) overcomes the hurdle of replicative senescence associated with the in vitro expansion of primary cells and has increased therapeutic benefits in comparison to the use of various adult sources of MSCs in a wide range of animal disease models. On the other hand, fetal MSCs exhibit faster growth kinetics and possess longer telomeres and a wider differentiation potential than adult MSCs. Here, for the first time, we compare the therapeutic potential of PSC‐MSCs (ES‐MSCs from embryonic stem cells) to fetal MSCs (AF‐MSCs from the amniotic fluid), demonstrating that ES‐MSCs have a superior neuroprotective potential over AF‐MSCs in the mouse brain following hypoxia‐ischemia. Further, we demonstrate that nuclear factor (NF)‐κB‐stimulated interleukin (IL)‐13 production contributes to an increased in vitro anti‐inflammatory potential of ES‐MSC‐conditioned medium (CM) over AF‐MSC‐CM, thus suggesting a potential mechanism for this observation. Moreover, we show that induced pluripotent stem cell‐derived MSCs (iMSCs) exhibit many similarities to ES‐MSCs, including enhanced NF‐κB signaling and IL‐13 production in comparison to AF‐MSCs. Future studies should assess whether iMSCs also exhibit similar neuroprotective potential to ES‐MSCs, thus presenting a potential strategy to overcome the ethical issues associated with the use of embryonic stem cells and providing a potential source of cells for autologous use against neonatal hypoxic‐ischemic encephalopathy in humans. Stem Cells Translational Medicine2018;7:439–449
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Affiliation(s)
- Kate E Hawkins
- Maternal and Fetal Medicine Department, Institute for Women's Health, University College London, London, United Kingdom
| | - Michelangelo Corcelli
- Maternal and Fetal Medicine Department, Institute for Women's Health, University College London, London, United Kingdom
| | - Kate Dowding
- Maternal and Fetal Medicine Department, Institute for Women's Health, University College London, London, United Kingdom
| | - Anna M Ranzoni
- Maternal and Fetal Medicine Department, Institute for Women's Health, University College London, London, United Kingdom
| | - Filipa Vlahova
- Maternal and Fetal Medicine Department, Institute for Women's Health, University College London, London, United Kingdom
| | - Kwan-Leong Hau
- Maternal and Fetal Medicine Department, Institute for Women's Health, University College London, London, United Kingdom.,Faculty of Medicine, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Avina Hunjan
- Maternal and Fetal Medicine Department, Institute for Women's Health, University College London, London, United Kingdom
| | - Donald Peebles
- Maternal and Fetal Medicine Department, Institute for Women's Health, University College London, London, United Kingdom
| | - Pierre Gressens
- Department of Perinatal Imaging and Health, St. Thomas' Hospital, King's College London, London, United Kingdom
| | - Henrik Hagberg
- Department of Perinatal Imaging and Health, St. Thomas' Hospital, King's College London, London, United Kingdom
| | - Paolo de Coppi
- Stem Cells and Regenerative Medicine Department, Great Ormond Street Institute for Child Health, University College London, London, United Kingdom
| | - Mariya Hristova
- Maternal and Fetal Medicine Department, Institute for Women's Health, University College London, London, United Kingdom
| | - Pascale V Guillot
- Maternal and Fetal Medicine Department, Institute for Women's Health, University College London, London, United Kingdom
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18
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Alfego D, Rodeck U, Kriete A. Global mapping of transcription factor motifs in human aging. PLoS One 2018; 13:e0190457. [PMID: 29293662 PMCID: PMC5749797 DOI: 10.1371/journal.pone.0190457] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 12/14/2017] [Indexed: 12/12/2022] Open
Abstract
Biological aging is a complex process dependent on the interplay of cell autonomous and tissue contextual changes which occur in response to cumulative molecular stress and manifest through adaptive transcriptional reprogramming. Here we describe a transcription factor (TF) meta-analysis of gene expression datasets accrued from 18 tissue sites collected at different biological ages and from 7 different in-vitro aging models. In-vitro aging platforms included replicative senescence and an energy restriction model in quiescence (ERiQ), in which ATP was transiently reduced. TF motifs in promoter regions of trimmed sets of target genes were scanned using JASPAR and TRANSFAC. TF signatures established a global mapping of agglomerating motifs with distinct clusters when ranked hierarchically. Remarkably, the ERiQ profile was shared with the majority of in-vivo aged tissues. Fitting motifs in a minimalistic protein-protein network allowed to probe for connectivity to distinct stress sensors. The DNA damage sensors ATM and ATR linked to the subnetwork associated with senescence. By contrast, the energy sensors PTEN and AMPK connected to the nodes in the ERiQ subnetwork. These data suggest that metabolic dysfunction may be linked to transcriptional patterns characteristic of many aged tissues and distinct from cumulative DNA damage associated with senescence.
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Affiliation(s)
- David Alfego
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, Pennsylvania, United States of America
| | - Ulrich Rodeck
- Department of Dermatology and Cutaneous Biology, Thomas Jefferson University, Philadelphia, Pennsylvania, United States of America
| | - Andres Kriete
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, Pennsylvania, United States of America
- * E-mail:
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19
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Li JJ, Ma FX, Wang YW, Chen F, Lu SH, Chi Y, Du WJ, Song BQ, Hu LD, Chen H, Han ZC. Knockdown of IL-8 Provoked Premature Senescence of Placenta-Derived Mesenchymal Stem Cells. Stem Cells Dev 2017; 26:912-931. [PMID: 28418782 DOI: 10.1089/scd.2016.0324] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Mesenchymal stem cells (MSCs) have shown promise for use in cell therapy, and due to their tumor tropism can serve as vehicles for delivering therapeutic agents to tumor sites. Because interleukin-8 (IL-8) is known to mediate the protumor effect of MSCs, elimination of IL-8 secretion by MSCs may enhance their safety for use in cancer gene therapy. However, little is known concerning the effect of endogenously secreted IL-8 on MSCs. We performed studies using placenta-derived MSCs (PMSCs) to determine whether knockdown of IL-8 would influence their biological activity. We first verified that IL-8 and its membrane receptor CXCR2, but not CXCR1, were highly expressed in PMSCs. We then employed lentivirus-mediated small hairpin RNA interference to generate stable IL-8-silenced PMSCs, which displayed a variety of characteristic senescent phenotypes. We observed that at day 9 post-transfection, IL-8-silenced PMSCs had become larger and displayed a more flattened appearance when compared with their controls. Moreover, their proliferation, colony forming unit-fibroblast formation, adipogenic and osteogenic differentiation, and immunosuppressive potentials were significantly impaired. Enhanced senescence-associated β-galactosidase (SA-β-gal) activity and specific global gene expression profiles confirmed that IL-8 silencing evoked the senescence process in PMSCs. Increased levels of p-Akt and decreased levels of FOXO3a protein expression suggested that reactive oxygen species played a role in the initiation and maintenance of senescence in IL-8-silenced PMSCs. Notably, the majority of CXCR2 ligands were downregulated in presenescent IL-8-silenced PMSCs but upregulated in senescent cells, indicating an antagonistic pleiotropy of the IL-8/CXCR2 signaling pathway in PMSCs. This effect may promote the proliferation of young cells and accelerate senescence of old cells.
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Affiliation(s)
- Juan-Juan Li
- 1 The State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases , Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China .,2 Department of Hematopoietic Stem Cell Transplantation, Affiliated Hospital of Academy of Military Medical Science , Beijing, China
| | - Feng-Xia Ma
- 1 The State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases , Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - You-Wei Wang
- 1 The State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases , Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Fang Chen
- 1 The State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases , Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Shi-Hong Lu
- 1 The State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases , Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Ying Chi
- 1 The State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases , Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Wen-Jing Du
- 1 The State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases , Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Bao-Quan Song
- 1 The State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases , Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Liang-Ding Hu
- 2 Department of Hematopoietic Stem Cell Transplantation, Affiliated Hospital of Academy of Military Medical Science , Beijing, China
| | - Hu Chen
- 2 Department of Hematopoietic Stem Cell Transplantation, Affiliated Hospital of Academy of Military Medical Science , Beijing, China
| | - Zhong-Chao Han
- 1 The State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases , Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China .,3 H&B Group, Beijing Institute of Stem Cells , Beijing, China
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20
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Zhang GH, Chao M, Hui LH, Xu DL, Cai WL, Zheng J, Gao M, Zhang MX, Wang J, Lu QH. Poly(ADP-ribose)polymerase 1 inhibition protects against age-dependent endothelial dysfunction. Clin Exp Pharmacol Physiol 2016; 42:1266-74. [PMID: 26331430 DOI: 10.1111/1440-1681.12484] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 08/23/2015] [Accepted: 08/25/2015] [Indexed: 11/28/2022]
Abstract
Age-related endothelial dysfunction is closely associated with the local production of reactive oxygen species (ROS) within and in the vicinity of the vascular endothelium. Oxidant-induced DNA damage can activate the nuclear enzyme poly(ADP-ribose) polymerase 1 (PARP-1), leading to endothelial dysfunction in various pathophysiological conditions. The present study aimed to investigate the role of PARP-1 in age-dependent changes in endothelial cell function and its underlying mechanism. Wild-type (WT) and PARP-1(-/-) mice were divided into young (2 months) and old (12 months) groups. Isolated aortic rings were suspended to record isometric tension to assess endothelial function. Nitric oxide (NO) production and content in plasma were detected by spectrophotometry. Superoxide (O2(-) production was detected by dihydroethidium. Expression of PARP-1, endothelial nitric oxide synthase (eNOS), induced nitric oxide synthase (iNOS), and arginase-2 (Arg2) was assessed by western blot analysis. Endothelium-dependent relaxation in response to acetylcholine was lost in old WT, but not PARP-1(-/-), mice. Endothelium-independent vasodilation was not impaired in aging mice. Production of O2(-) was greater in aging WT mice than young or aging PARP-1(-/-) mice. eNOS expression was not affected by aging in WT or PARP-1(-/-) mice, but p-eNOS expression decreased and iNOS and Arg2 levels were upregulated only in aging WT mice. In conclusion, PARP-1 inhibition may protect against age-dependent endothelial dysfunction, potentially by regulating NO bioavailability via iNOS. Inhibition of PARP-1 may help in vascular aging prevention.
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Affiliation(s)
- Guang-hao Zhang
- Department of Cardiology, The Second Hospital of Shandong University, Jinan, China.,Department of Cardiology, Taian City Central Hospital, Shandong, China
| | - Min Chao
- Department of Anorectal surgery, Afliated Hospital of Jining Medical College, Jining, Shandong, China
| | - Long-hua Hui
- The First Sanatorium of Jinan Military Region in Qingdao, Shandong, China.,Department of Cardiology, QiLu Hospital of Shandong University, Jinan, China
| | - Dong Ling Xu
- Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
| | - We-li Cai
- Department of Cardiology, The Third Hospital, Jinan, China
| | - Jie Zheng
- Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
| | - Min Gao
- Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
| | - Ming-xiang Zhang
- Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
| | - Juan Wang
- Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
| | - Qing-hua Lu
- Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
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21
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Yalamanchili N, Kriete A, Alfego D, Danowski KM, Kari C, Rodeck U. Distinct Cell Stress Responses Induced by ATP Restriction in Quiescent Human Fibroblasts. Front Genet 2016; 7:171. [PMID: 27757122 PMCID: PMC5047886 DOI: 10.3389/fgene.2016.00171] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 09/09/2016] [Indexed: 12/22/2022] Open
Abstract
Quiescence is the prevailing state of many cell types under homeostatic conditions. Yet, surprisingly little is known about how quiescent cells respond to energetic and metabolic challenges. To better understand compensatory responses of quiescent cells to metabolic stress, we established, in human primary dermal fibroblasts, an experimental ‘energy restriction’ model. Quiescence was achieved by short-term culture in serum-deprived media and ATP supply restricted using a combination of glucose transport inhibitors and mitochondrial uncouplers. In aggregate, these measures led to markedly reduced intracellular ATP levels while not compromising cell viability over the observation period of 48 h. Analysis of the transcription factor (TF) landscape induced by this treatment revealed alterations in several signal transduction nodes beyond the expected biosynthetic adaptations. These included increased abundance of NF-κB regulated TFs and altered TF subsets regulated by Akt and p53. The observed changes in gene regulation and corresponding alterations in key signaling nodes are likely to contribute to cell survival at intracellular ATP concentrations substantially below those achieved by growth factor deprivation alone. This experimental model provides a benchmark for the investigation of cell survival pathways and related molecular targets that are associated with restricted energy supply associated with biological aging and metabolic diseases.
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Affiliation(s)
- Nirupama Yalamanchili
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia PA, USA
| | - Andres Kriete
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia PA, USA
| | - David Alfego
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia PA, USA
| | - Kelli M Danowski
- Department of Dermatology, St. Joseph Mercy Health System, Michigan State University, East Lansing MI, USA
| | - Csaba Kari
- Department of Dermatology and Cutaneous Biology, Thomas Jefferson University, Philadelphia PA, USA
| | - Ulrich Rodeck
- Department of Dermatology and Cutaneous Biology, Thomas Jefferson University, Philadelphia PA, USA
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22
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Gillespie ZE, Pickering J, Eskiw CH. Better Living through Chemistry: Caloric Restriction (CR) and CR Mimetics Alter Genome Function to Promote Increased Health and Lifespan. Front Genet 2016; 7:142. [PMID: 27588026 PMCID: PMC4988992 DOI: 10.3389/fgene.2016.00142] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 07/21/2016] [Indexed: 12/19/2022] Open
Abstract
Caloric restriction (CR), defined as decreased nutrient intake without causing malnutrition, has been documented to increase both health and lifespan across numerous organisms, including humans. Many drugs and other compounds naturally occurring in our diet (nutraceuticals) have been postulated to act as mimetics of caloric restriction, leading to a wave of research investigating the efficacy of these compounds in preventing age-related diseases and promoting healthier, longer lifespans. Although well studied at the biochemical level, there are still many unanswered questions about how CR and CR mimetics impact genome function and structure. Here we discuss how genome function and structure are influenced by CR and potential CR mimetics, including changes in gene expression profiles and epigenetic modifications and their potential to identify the genetic fountain of youth.
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Affiliation(s)
- Zoe E Gillespie
- Department of Food and Bioproduct Sciences, University of Saskatchewan Saskatoon, SK, Canada
| | - Joshua Pickering
- Department of Biochemistry, University of Saskatchewan Saskatoon, SK, Canada
| | - Christopher H Eskiw
- Department of Food and Bioproduct Sciences, University of SaskatchewanSaskatoon, SK, Canada; Department of Biochemistry, University of SaskatchewanSaskatoon, SK, Canada
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23
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Haustead DJ, Stevenson A, Saxena V, Marriage F, Firth M, Silla R, Martin L, Adcroft KF, Rea S, Day PJ, Melton P, Wood FM, Fear MW. Transcriptome analysis of human ageing in male skin shows mid-life period of variability and central role of NF-κB. Sci Rep 2016; 6:26846. [PMID: 27229172 PMCID: PMC4882522 DOI: 10.1038/srep26846] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 05/09/2016] [Indexed: 01/21/2023] Open
Abstract
Age is well-known to be a significant factor in both disease pathology and response to treatment, yet the molecular changes that occur with age in humans remain ill-defined. Here, using transcriptome profiling of healthy human male skin, we demonstrate that there is a period of significantly elevated, transcriptome-wide expression changes occurring predominantly in middle age. Both pre and post this period, the transcriptome appears to undergo much smaller, linear changes with increasing age. Functional analysis of the transient changes in middle age suggest a period of heightened metabolic activity and cellular damage associated with NF-kappa-B and TNF signaling pathways. Through meta-analysis we also show the presence of global, tissue independent linear transcriptome changes with age which appear to be regulated by NF-kappa-B. These results suggest that aging in human skin is associated with a critical mid-life period with widespread transcriptome changes, both preceded and proceeded by a relatively steady rate of linear change in the transcriptome. The data provides insight into molecular changes associated with normal aging and will help to better understand the increasingly important pathological changes associated with aging.
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Affiliation(s)
- Daniel J. Haustead
- The Fiona Wood Foundation, Perth, WA 6000, Australia
- Faculty of Medicine, Dentistry and Health Sciences, University of Western Australia, Crawley WA 6009, Australia
- Faculty of Medicine and Health Sciences, University of Manchester, Manchester, M1 7DN, UK
| | - Andrew Stevenson
- The Fiona Wood Foundation, Perth, WA 6000, Australia
- Burn Injury Research Unit, School of Surgery, University of Western Australia, Crawley WA 6009, Australia
| | - Vishal Saxena
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Fiona Marriage
- Faculty of Medicine and Health Sciences, University of Manchester, Manchester, M1 7DN, UK
| | - Martin Firth
- Faculty of Medicine, Dentistry and Health Sciences, University of Western Australia, Crawley WA 6009, Australia
| | - Robyn Silla
- The Fiona Wood Foundation, Perth, WA 6000, Australia
- Burns Service of Western Australia, Royal Perth Hospital and Princess Margaret Hospital, WA 6000, Australia
| | - Lisa Martin
- The Fiona Wood Foundation, Perth, WA 6000, Australia
- Burns Service of Western Australia, Royal Perth Hospital and Princess Margaret Hospital, WA 6000, Australia
| | - Katharine F. Adcroft
- The Fiona Wood Foundation, Perth, WA 6000, Australia
- Burn Injury Research Unit, School of Surgery, University of Western Australia, Crawley WA 6009, Australia
| | - Suzanne Rea
- The Fiona Wood Foundation, Perth, WA 6000, Australia
- Burn Injury Research Unit, School of Surgery, University of Western Australia, Crawley WA 6009, Australia
- Burns Service of Western Australia, Royal Perth Hospital and Princess Margaret Hospital, WA 6000, Australia
| | - Philip J. Day
- Faculty of Medicine and Health Sciences, University of Manchester, Manchester, M1 7DN, UK
| | - Phillip Melton
- Centre for Genetic Origins of Health and Disease, University of Western Australia, Crawley WA , Australia 6009
| | - Fiona M. Wood
- The Fiona Wood Foundation, Perth, WA 6000, Australia
- Faculty of Medicine, Dentistry and Health Sciences, University of Western Australia, Crawley WA 6009, Australia
- Burn Injury Research Unit, School of Surgery, University of Western Australia, Crawley WA 6009, Australia
- Burns Service of Western Australia, Royal Perth Hospital and Princess Margaret Hospital, WA 6000, Australia
| | - Mark W. Fear
- The Fiona Wood Foundation, Perth, WA 6000, Australia
- Burn Injury Research Unit, School of Surgery, University of Western Australia, Crawley WA 6009, Australia
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24
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Danilov A, Shaposhnikov M, Shevchenko O, Zemskaya N, Zhavoronkov A, Moskalev A. Influence of non-steroidal anti-inflammatory drugs on Drosophila melanogaster longevity. Oncotarget 2016; 6:19428-44. [PMID: 26305987 PMCID: PMC4637296 DOI: 10.18632/oncotarget.5118] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 07/17/2015] [Indexed: 02/07/2023] Open
Abstract
Most age-related diseases and aging itself are associated with chronic inflammation. Thus pharmacological inhibition of inflammatory processes may be effective antiaging strategy. In this study we demonstrated that treatment of Drosophila melanogaster with 10 non-steroidal anti-inflammatory drugs (NSAIDs: CAY10404, aspirin, APHS, SC-560, NS-398, SC-58125, valeroyl salicylate, trans-resveratrol, valdecoxib, licofelone) leads to extension of lifespan, delays age-dependent decline of locomotor activity and increases stress resistance. The effect of the lifespan increase was associated with decrease of fecundity. Depending on the concentration, NSAIDs demonstrated both anti- and pro-oxidant properties in Drosophila tissues. However, we failed to identify clear correlation between antioxidant properties of NSAIDs and their pro-longevity effects. The lifespan extending effects of APHS, SC-58125, valeroyl salicylate, trans-resveratrol, valdecoxib, and licofelone were more pronounced in males, valdecoxib and aspirin - in females. We demonstrated that lifespan extension effect of NSAIDs was abolished in flies with defective genes involved in Pkh2-ypk1-lem3-tat2 pathway.
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Affiliation(s)
- Anton Danilov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia.,Institute of Biology of Komi Science Center of Ural Branch of RAS, Syktyvkar, Russia
| | - Mikhail Shaposhnikov
- Institute of Biology of Komi Science Center of Ural Branch of RAS, Syktyvkar, Russia.,Syktyvkar State University, Syktyvkar, Russia
| | - Oksana Shevchenko
- Institute of Biology of Komi Science Center of Ural Branch of RAS, Syktyvkar, Russia
| | - Nadezhda Zemskaya
- Institute of Biology of Komi Science Center of Ural Branch of RAS, Syktyvkar, Russia
| | - Alex Zhavoronkov
- Center for Pediatric Hematology, Oncology and Immunology, Moscow, Russia
| | - Alexey Moskalev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia.,Institute of Biology of Komi Science Center of Ural Branch of RAS, Syktyvkar, Russia.,Syktyvkar State University, Syktyvkar, Russia.,Moscow Institute of Physics and Technology, Dolgoprudny, Russia
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25
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Aliper AM, Csoka AB, Buzdin A, Jetka T, Roumiantsev S, Moskalev A, Zhavoronkov A. Signaling pathway activation drift during aging: Hutchinson-Gilford Progeria Syndrome fibroblasts are comparable to normal middle-age and old-age cells. Aging (Albany NY) 2015; 7:26-37. [PMID: 25587796 PMCID: PMC4350323 DOI: 10.18632/aging.100717] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
For the past several decades, research in understanding the molecular basis of human aging has progressed significantly with the analysis of premature aging syndromes. Progerin, an altered form of lamin A, has been identified as the cause of premature aging in Hutchinson-Gilford Progeria Syndrome (HGPS), and may be a contributing causative factor in normal aging. However, the question of whether HGPS actually recapitulates the normal aging process at the cellular and organismal level, or simply mimics the aging phenotype is widely debated. In the present study we analyzed publicly available microarray datasets for fibroblasts undergoing cellular aging in culture, as well as fibroblasts derived from young, middle-age, and old-age individuals, and patients with HGPS. Using GeroScope pathway analysis and drug discovery platform we analyzed the activation states of 65 major cellular signaling pathways. Our analysis reveals that signaling pathway activation states in cells derived from chronologically young patients with HGPS strongly resemble cells taken from normal middle-aged and old individuals. This clearly indicates that HGPS may truly represent accelerated aging, rather than being just a simulacrum. Our data also points to potential pathways that could be targeted to develop drugs and drug combinations for both HGPS and normal aging.
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Affiliation(s)
- Alexander M Aliper
- Insilico Medicine, Inc., Johns Hopkins University, ETC, B301, MD 21218, USA.,Federal Clinical Research Center of Pediatric Hematology, Oncology and Immunology, Moscow, Russia
| | - Antonei Benjamin Csoka
- Vision Genomics LLC, Washington DC 20011, USA.,Epigenetics Laboratory, Dept. of Anatomy, Howard University, Washington DC 20059, USA
| | - Anton Buzdin
- Insilico Medicine, Inc., Johns Hopkins University, ETC, B301, MD 21218, USA.,Pathway Pharmaceuticals, Limited, Wan Chai, Hong Kong
| | - Tomasz Jetka
- Institute of Fundamental Technological Research, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Sergey Roumiantsev
- Insilico Medicine, Inc., Johns Hopkins University, ETC, B301, MD 21218, USA.,Pirogov Russian National Research Medical University, Moscow 117997, Russia.,Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia
| | - Alexy Moskalev
- Insilico Medicine, Inc., Johns Hopkins University, ETC, B301, MD 21218, USA.,Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia.,George Mason University, Fairfax, VA 22030, USA
| | - Alex Zhavoronkov
- Insilico Medicine, Inc., Johns Hopkins University, ETC, B301, MD 21218, USA.,Federal Clinical Research Center of Pediatric Hematology, Oncology and Immunology, Moscow, Russia.,Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia.,The Biotechnology Research Foundation, BGRF, London W1J 5NE, UK
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26
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Abstract
NF-κB is a major regulator of age-dependent gene expression and the p50/NF-κB1 subunit is an integral modulator of NF-κB signaling. Here, we examined Nfkb1-/- mice to investigate the relationship between this subunit and aging. Although Nfkb1-/- mice appear similar to littermates at six months of age, by 12 months they have a higher incidence of several observable age-related phenotypes. In addition, aged Nfkb1-/- animals have increased kyphosis, decreased cortical bone, increased brain GFAP staining and a decrease in overall lifespan compared to Nfkb1+/+. In vitro, serially passaged primary Nfkb1-/- MEFs have more senescent cells than comparable Nfkb1+/+ MEFs. Also, Nfkb1-/- MEFs have greater amounts of phospho-H2AX foci and lower levels of spontaneous apoptosis than Nfkb1+/+, findings that are mirrored in the brains of Nfkb1-/- animals compared to Nfkb1+/+. Finally, in wildtype animals a substantial decrease in p50 DNA binding is seen in aged tissue compared to young. Together, these data show that loss of Nfkb1 leads to early animal aging that is associated with reduced apoptosis and increased cellular senescence. Moreover, loss of p50 DNA binding is a prominent feature of aged mice relative to young. These findings support the strong link between the NF-κB pathway and mammalian aging.
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Abbasi A, Forsberg K, Bischof F. The role of the ubiquitin-editing enzyme A20 in diseases of the central nervous system and other pathological processes. Front Mol Neurosci 2015; 8:21. [PMID: 26124703 PMCID: PMC4466442 DOI: 10.3389/fnmol.2015.00021] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 05/24/2015] [Indexed: 11/28/2022] Open
Abstract
In recent years, the ubiquitin-editing enzyme A20 has been shown to control a large set of molecular pathways involved in the regulation of protective as well as self-directed immune responses. Here, we assess the current and putative roles of A20 in inflammatory, vascular and degenerative diseases of the central nervous system and explore future directions of research.
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Affiliation(s)
- Asghar Abbasi
- Department of Neuroimmunology, Hertie Institute for Clinical Brain Research and Center of Neurology, University Hospital Tübingen Tübingen, Germany
| | - Kirsi Forsberg
- Department of Neuroimmunology, Hertie Institute for Clinical Brain Research and Center of Neurology, University Hospital Tübingen Tübingen, Germany
| | - Felix Bischof
- Department of Neuroimmunology, Hertie Institute for Clinical Brain Research and Center of Neurology, University Hospital Tübingen Tübingen, Germany
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28
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Sola Carvajal A, McKenna T, Wallén Arzt E, Eriksson M. Overexpression of Lamin B Receptor Results in Impaired Skin Differentiation. PLoS One 2015; 10:e0128917. [PMID: 26053873 PMCID: PMC4459694 DOI: 10.1371/journal.pone.0128917] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 05/01/2015] [Indexed: 01/11/2023] Open
Abstract
Hutchinson-Gilford progeria syndrome (HGPS) is a rare segmental progeroid disorder commonly caused by a point mutation in the LMNA gene that results in the increased activation of an intra-exonic splice site and the production of a truncated lamin A protein, named progerin. In our previous work, induced murine epidermal expression of this specific HGPS LMNA mutation showed impaired keratinocyte differentiation and upregulated lamin B receptor (LBR) expression in suprabasal keratinocytes. Here, we have developed a novel transgenic animal model with induced overexpression of LBR in the interfollicular epidermis. LBR overexpression resulted in epidermal hypoplasia, along with the downregulation and mislocalization of keratin 10, suggesting impaired keratinocyte differentiation. Increased LBR expression in basal and suprabasal cells did not coincide with increased proliferation. Similar to our previous report of HGPS mice, analyses of γH2AX, a marker of DNA double-strand breaks, revealed an increased number of keratinocytes with multiple foci in LBR-overexpressing mice compared with wild-type mice. In addition, suprabasal LBR-positive cells showed densely condensed and peripherally localized chromatin. Our results show a moderate skin differentiation phenotype, which indicates that upregulation of LBR is not the sole contributor to the HGPS phenotype.
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Affiliation(s)
- Agustín Sola Carvajal
- Department of Biosciences and Nutrition, Center for Innovative Medicine, Karolinska Institutet, Huddinge, SE-141 83, Sweden
| | - Tomás McKenna
- Department of Biosciences and Nutrition, Center for Innovative Medicine, Karolinska Institutet, Huddinge, SE-141 83, Sweden
| | - Emelie Wallén Arzt
- Department of Biosciences and Nutrition, Center for Innovative Medicine, Karolinska Institutet, Huddinge, SE-141 83, Sweden
| | - Maria Eriksson
- Department of Biosciences and Nutrition, Center for Innovative Medicine, Karolinska Institutet, Huddinge, SE-141 83, Sweden
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Comparative Meta-Analysis of Transcriptomics Data during Cellular Senescence and In Vivo Tissue Ageing. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:732914. [PMID: 25977747 PMCID: PMC4419258 DOI: 10.1155/2015/732914] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Revised: 03/22/2015] [Accepted: 03/23/2015] [Indexed: 02/06/2023]
Abstract
Several studies have employed DNA microarrays to identify gene expression signatures that mark human ageing; yet the features underlying this complicated phenomenon remain elusive. We thus conducted a bioinformatics meta-analysis on transcriptomics data from human cell- and biopsy-based microarrays experiments studying cellular senescence or in vivo tissue ageing, respectively. We report that coregulated genes in the postmitotic muscle and nervous tissues are classified into pathways involved in cancer, focal adhesion, actin cytoskeleton, MAPK signalling, and metabolism regulation. Genes that are differentially regulated during cellular senescence refer to pathways involved in neurodegeneration, focal adhesion, actin cytoskeleton, proteasome, cell cycle, DNA replication, and oxidative phosphorylation. Finally, we revealed genes and pathways (referring to cancer, Huntington's disease, MAPK signalling, focal adhesion, actin cytoskeleton, oxidative phosphorylation, and metabolic signalling) that are coregulated during cellular senescence and in vivo tissue ageing. The molecular commonalities between cellular senescence and tissue ageing are also highlighted by the fact that pathways that were overrepresented exclusively in the biopsy- or cell-based datasets are modules either of the same reference pathway (e.g., metabolism) or of closely interrelated pathways (e.g., thyroid cancer and melanoma). Our reported meta-analysis has revealed novel age-related genes, setting thus the basis for more detailed future functional studies.
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30
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Brett JO, Rando TA. Alive and well? Exploring disease by studying lifespan. Curr Opin Genet Dev 2014; 26:33-40. [PMID: 25005743 DOI: 10.1016/j.gde.2014.05.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 05/10/2014] [Accepted: 05/26/2014] [Indexed: 12/11/2022]
Abstract
A common concept in aging research is that chronological age is the most important risk factor for the development of diverse diseases, including degenerative diseases and cancers. The mechanistic link between the aging process and disease pathogenesis, however, is still enigmatic. Nevertheless, measurement of lifespan, as a surrogate for biological aging, remains among the most frequently used assays in aging research. In this review, we examine the connection between 'normal aging' and age-related disease from the point of view that they form a continuum of aging phenotypes. This notion of common mechanisms gives rise to the converse postulate that diseases may be risk factors for accelerated aging. We explore the advantages and caveats associated with using lifespan as a metric to understand cell and tissue aging, focusing on the elucidation of molecular mechanisms and potential therapies for age-related diseases.
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Affiliation(s)
- Jamie O Brett
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA; Paul F. Glenn Laboratories for the Biology of Aging, Stanford University School of Medicine, Stanford, CA, USA; Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
| | - Thomas A Rando
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA; Paul F. Glenn Laboratories for the Biology of Aging, Stanford University School of Medicine, Stanford, CA, USA; Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA; Neurology Service and Rehabilitation Research and Development Center of Excellence, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA.
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31
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McKenna T, Rosengardten Y, Viceconte N, Baek JH, Grochová D, Eriksson M. Embryonic expression of the common progeroid lamin A splice mutation arrests postnatal skin development. Aging Cell 2014; 13:292-302. [PMID: 24305605 PMCID: PMC4331787 DOI: 10.1111/acel.12173] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/13/2013] [Indexed: 01/14/2023] Open
Abstract
Hutchinson-Gilford progeria syndrome (HGPS) and restrictive dermopathy (RD) are two laminopathies caused by mutations leading to cellular accumulation of prelamin A or one of its truncated forms, progerin. One proposed mechanism for the more severe symptoms in patients with RD compared with HGPS is that higher levels of farnesylated lamin A are produced in RD. Here, we show evidence in support of that hypothesis. Overexpression of the most common progeroid lamin A mutation (LMNA c.1824C>T, p.G608G) during skin development results in a severe phenotype, characterized by dry scaly skin. At postnatal day 5 (PD5), progeroid animals showed a hyperplastic epidermis, disorganized sebaceous glands and an acute inflammatory dermal response, also involving the hypodermal fat layer. PD5 animals also showed an upregulation of multiple inflammatory response genes and an activated NF-kB target pathway. Careful analysis of the interfollicular epidermis showed aberrant expression of the lamin B receptor (LBR) in the suprabasal layer. Prolonged expression of LBR, in 14.06% of the cells, likely contributes to the observed arrest of skin development, clearly evident at PD4 when the skin had developed into single-layer epithelium in the wild-type animals while progeroid animals still had the multilayered appearance typical for skin at PD3. Suprabasal cells expressing LBR showed altered DNA distribution, suggesting the induction of gene expression changes. Despite the formation of a functional epidermal barrier and proven functionality of the gap junctions, progeroid animals displayed a greater rate of water loss as compared with wild-type littermates and died within the first two postnatal weeks.
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Affiliation(s)
- Tomás McKenna
- Department of Biosciences and Nutrition, Center for Biosciences, Karolinska Institutet, NovumSE-14183, Huddinge, Sweden
| | - Ylva Rosengardten
- Department of Biosciences and Nutrition, Center for Biosciences, Karolinska Institutet, NovumSE-14183, Huddinge, Sweden
| | | | | | - Diana Grochová
- Department of Biosciences and Nutrition, Center for Biosciences, Karolinska Institutet, NovumSE-14183, Huddinge, Sweden
| | - Maria Eriksson
- Department of Biosciences and Nutrition, Center for Biosciences, Karolinska Institutet, NovumSE-14183, Huddinge, Sweden
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32
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Zhao W, Qi L, Qin Y, Wang H, Chen B, Wang R, Gu Y, Liu C, Wang C, Guo Z. Functional comparison between genes dysregulated in ulcerative colitis and colorectal carcinoma. PLoS One 2013; 8:e71989. [PMID: 23991021 PMCID: PMC3750042 DOI: 10.1371/journal.pone.0071989] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 07/05/2013] [Indexed: 01/25/2023] Open
Abstract
Background Patients with ulcerative colitis (UC) are predisposed to colitis-associated colorectal cancer (CAC). However, the transcriptional mechanism of the transformation from UC to CAC is not fully understood. Methodology Firstly, we showed that CAC and non-UC-associated CRC were very similar in gene expression. Secondly, based on multiple datasets for UC and CRC, we extracted differentially expressed (DE) genes in UC and CRC versus normal controls, respectively. Thirdly, we compared the dysregulation directions (upregulation or downregulation) between DE genes of UC and CRC in CRC-related functions overrepresented with the DE genes of CRC, and proposed a regulatory model to explain the CRC-like dysregulation of genes in UC. A case study for “positive regulation of immune system process” was done to reveal the functional implication of DE genes with reversal dysregulations in these two diseases. Principal Findings In all the 44 detected CRC-related functions except for “viral transcription”, the dysregulation directions of DE genes in UC were significantly similar with their counterparts in CRC, and such CRC-like dysregulation in UC could be regulated by transcription factors affected by pro-inflammatory stimuli for colitis. A small portion of genes in each CRC-related function were dysregulated in opposite directions in the two diseases. The case study showed that genes related to humoral immunity specifically expressed in B cells tended to be upregulated in UC but downregulated in CRC. Conclusions The CRC-like dysregulation of genes in CRC-related functions in UC patients provides hints for understanding the transcriptional basis for UC to CRC transition. A small portion of genes with distinct dysregulation directions in each of the CRC-related functions in the two diseases implicate that their reversal dysregulations might be critical for UC to CRC transition. The cases study indicates that the humoral immune response might be inhibited during the transformation from UC to CRC.
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Affiliation(s)
- Wenyuan Zhao
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Lishuang Qi
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Yao Qin
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Hongwei Wang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Beibei Chen
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Ruiping Wang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Yunyan Gu
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Chunyang Liu
- Department of Bioinformatics, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Chenguang Wang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
- * E-mail: (ZG); (CW)
| | - Zheng Guo
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
- Department of Bioinformatics, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
- * E-mail: (ZG); (CW)
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33
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Tilstra JS, Robinson AR, Wang J, Gregg SQ, Clauson CL, Reay DP, Nasto LA, St Croix CM, Usas A, Vo N, Huard J, Clemens PR, Stolz DB, Guttridge DC, Watkins SC, Garinis GA, Wang Y, Niedernhofer LJ, Robbins PD. NF-κB inhibition delays DNA damage-induced senescence and aging in mice. J Clin Invest 2012; 122:2601-12. [PMID: 22706308 DOI: 10.1172/jci45785] [Citation(s) in RCA: 321] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Accepted: 05/10/2012] [Indexed: 12/21/2022] Open
Abstract
The accumulation of cellular damage, including DNA damage, is thought to contribute to aging-related degenerative changes, but how damage drives aging is unknown. XFE progeroid syndrome is a disease of accelerated aging caused by a defect in DNA repair. NF-κB, a transcription factor activated by cellular damage and stress, has increased activity with aging and aging-related chronic diseases. To determine whether NF-κB drives aging in response to the accumulation of spontaneous, endogenous DNA damage, we measured the activation of NF-κB in WT and progeroid model mice. As both WT and progeroid mice aged, NF-κB was activated stochastically in a variety of cell types. Genetic depletion of one allele of the p65 subunit of NF-κB or treatment with a pharmacological inhibitor of the NF-κB-activating kinase, IKK, delayed the age-related symptoms and pathologies of progeroid mice. Additionally, inhibition of NF-κB reduced oxidative DNA damage and stress and delayed cellular senescence. These results indicate that the mechanism by which DNA damage drives aging is due in part to NF-κB activation. IKK/NF-κB inhibitors are sufficient to attenuate this damage and could provide clinical benefit for degenerative changes associated with accelerated aging disorders and normal aging.
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Affiliation(s)
- Jeremy S Tilstra
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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Abstract
Cellular senescence is a program of irreversible cell cycle arrest that cells undergo in response to a variety of intrinsic and extrinsic stimuli including progressive shortening of telomeres, changes in telomeric structure or other forms of genotoxic and non-genotoxic stress. The role of nuclear factor-κB in cellular senescence is controversial, as it has been associated with both proliferation and tumour progression, and also with growth arrest and ageing. This research perspective focuses on the evidence for a functional relationship between NF-κB and senescence, and how disruption of the NF-κB pathway can lead to its bypass.
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Affiliation(s)
- Simon Vaughan
- Department of Neurodegenerative Disease, UCL Institute of Neurology, Queen Square, London, UK
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35
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Tilstra JS, Clauson CL, Niedernhofer LJ, Robbins PD. NF-κB in Aging and Disease. Aging Dis 2011; 2:449-465. [PMID: 22396894 PMCID: PMC3295063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2011] [Revised: 10/01/2011] [Accepted: 10/04/2011] [Indexed: 05/31/2023] Open
Abstract
Stochastic damage to cellular macromolecules and organelles is thought to be a driving force behind aging and associated degenerative changes. However, stress response pathways activated by this damage may also contribute to aging. The IKK/NF-κB signaling pathway has been proposed to be one of the key mediators of aging. It is activated by genotoxic, oxidative, and inflammatory stresses and regulates expression of cytokines, growth factors, and genes that regulate apoptosis, cell cycle progression, cell senescence, and inflammation. Transcriptional activity of NF-κB is increased in a variety of tissues with aging and is associated with numerous age-related degenerative diseases including Alzheimer's, diabetes and osteoporosis. In mouse models, inhibition of NF-κB leads to delayed onset of age-related symptoms and pathologies. In addition, NF-κB activation is linked with many of the known lifespan regulators including insulin/IGF-1, FOXO, SIRT, mTOR, and DNA damage. Thus NF-κB represents a possible therapeutic target for extending mammalian healthspan.
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Affiliation(s)
- Jeremy S. Tilstra
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Cheryl L. Clauson
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Laura J. Niedernhofer
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- University of Pittsburgh Cancer Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Paul D. Robbins
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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Zhou F, Onizawa S, Nagai A, Aoshiba K. Epithelial cell senescence impairs repair process and exacerbates inflammation after airway injury. Respir Res 2011; 12:78. [PMID: 21663649 PMCID: PMC3118351 DOI: 10.1186/1465-9921-12-78] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Accepted: 06/10/2011] [Indexed: 12/20/2022] Open
Abstract
Background Genotoxic stress, such as by exposure to bromodeoxyuridine (BrdU) and cigarette smoke, induces premature cell senescence. Recent evidence indicates that cellular senescence of various types of cells is accelerated in COPD patients. However, whether the senescence of airway epithelial cells contributes to the development of airway diseases is unknown. The present study was designed to test the hypothesis that premature senescence of airway epithelial cells (Clara cells) impairs repair processes and exacerbates inflammation after airway injury. Methods C57/BL6J mice were injected with the Clara-cell-specific toxicant naphthalene (NA) on days 0, 7, and 14, and each NA injection was followed by a daily dose of BrdU on each of the following 3 days, during which regenerating cells were allowed to incorporate BrdU into their DNA and to senesce. The p38 MAPK inhibitor SB202190 was injected 30 minutes before each BrdU dose. Mice were sacrificed at different times until day 28 and lungs of mice were obtained to investigate whether Clara cell senescence impairs airway epithelial regeneration and exacerbates airway inflammation. NCI-H441 cells were induced to senesce by exposure to BrdU or the telomerase inhibitor MST-312. Human lung tissue samples were obtained from COPD patients, asymptomatic smokers, and nonsmokers to investigate whether Clara cell senescence is accelerated in the airways of COPD patients, and if so, whether it is accompanied by p38 MAPK activation. Results BrdU did not alter the intensity of the airway epithelial injury or inflammation after a single NA exposure. However, after repeated NA exposure, BrdU induced epithelial cell (Clara cell) senescence, as demonstrated by a DNA damage response, p21 overexpression, increased senescence-associated β-galactosidase activity, and growth arrest, which resulted in impaired epithelial regeneration. The epithelial senescence was accompanied by p38 MAPK-dependent airway inflammation. Senescent NCI-H441 cells impaired epithelial wound repair and secreted increased amounts of pro-inflammatory cytokines in a p38 MAPK-dependent manner. Clara cell senescence in COPD patients was accelerated and accompanied by p38 MAPK activation. Conclusions Senescence of airway epithelial cells impairs repair processes and exacerbates p38 MAPK-dependent inflammation after airway injury, and it may contribute to the pathogenesis of COPD.
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Affiliation(s)
- Fang Zhou
- Graduate School of Medical Science, Tokyo Women's Medical University, Shinjuku-ku, Tokyo, Japan
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37
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Rovillain E, Mansfield L, Caetano C, Alvarez-Fernandez M, Caballero OL, Medema RH, Hummerich H, Jat PS. Activation of nuclear factor-kappa B signalling promotes cellular senescence. Oncogene 2011; 30:2356-66. [PMID: 21242976 PMCID: PMC3080811 DOI: 10.1038/onc.2010.611] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Revised: 11/10/2010] [Accepted: 12/04/2010] [Indexed: 12/13/2022]
Abstract
Cellular senescence is a programme of irreversible cell cycle arrest that normal cells undergo in response to progressive shortening of telomeres, changes in telomeric structure, oncogene activation or oxidative stress. The underlying signalling pathways, of major clinicopathological relevance, are unknown. We combined genome-wide expression profiling with genetic complementation to identify genes that are differentially expressed when conditionally immortalised human fibroblasts undergo senescence upon activation of the p16-pRB and p53-p21 tumour suppressor pathways. This identified 816 up and 961 downregulated genes whose expression was reversed when senescence was bypassed. Overlay of this data set with the meta-signatures of genes upregulated in cancer showed that nearly 50% of them were downregulated upon senescence showing that even though overcoming senescence may only be one of the events required for malignant transformation, nearly half of the genes upregulated in cancer are related to it. Moreover 65 of the up and 26 of the downregulated genes are known downstream targets of nuclear factor (NF)-κB suggesting that senescence was associated with activation of the NF-κB pathway. Direct perturbation of this pathway bypasses growth arrest indicating that activation of NF-κB signalling has a causal role in promoting senescence.
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Affiliation(s)
- Emilie Rovillain
- Department of Neurodegenerative Disease UCL Institute of Neurology Queen Square London WC1N 3BG UK
| | - Louise Mansfield
- Department of Neurodegenerative Disease UCL Institute of Neurology Queen Square London WC1N 3BG UK
| | - Catia Caetano
- Department of Neurodegenerative Disease UCL Institute of Neurology Queen Square London WC1N 3BG UK
| | - Monica Alvarez-Fernandez
- Department of Medical Oncology University Medical Center Universiteitsweg 100 3584 CG Utrecht The Netherlands
| | - Otavia L. Caballero
- Ludwig Institute for Cancer Research Ltd 1275 York Avenue, BOX 32 New York, NY 10065 USA
| | - Rene H. Medema
- Department of Medical Oncology University Medical Center Universiteitsweg 100 3584 CG Utrecht The Netherlands
| | - Holger Hummerich
- MRC Prion Unit UCL Institute of Neurology Queen Square London WC1N 3BG UK
| | - Parmjit S. Jat
- Department of Neurodegenerative Disease UCL Institute of Neurology Queen Square London WC1N 3BG UK
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38
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Li Z, Li J, Bu X, Liu X, Tankersley CG, Wang C, Huang K. Age-induced augmentation of p38 MAPK phosphorylation in mouse lung. Exp Gerontol 2011; 46:694-702. [PMID: 21570457 DOI: 10.1016/j.exger.2011.04.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Revised: 04/09/2011] [Accepted: 04/25/2011] [Indexed: 01/17/2023]
Abstract
The p38 mitogen-activated protein kinase (p38 MAPK) pathway is a key regulator of pro-inflammatory cytokine biosynthesis, which may contribute to the chronic low-grade inflammation observed with aging. We hypothesize that aging up-regulates the activation of p38 MAPK as well as the pro-inflammatory cytokines tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) and interleukin-6 (IL-6) in mouse lung, and is accompanied by disturbances in oxidant-antioxidant status. In addition, the elevated protein levels of phosphorylated active form of p38 MAPK (phospho-p38 MAPK) with age are tissue-specific. To test this hypothesis, protein levels of phospho-p38 MAPK were determined using Western blot analysis in isolated lung, brain, heart, spleen, kidney and muscle of young (2-month-old) and aged (20-month-old) male C57BL/6J mice. Results show that phospho-p38 MAPK protein levels, not total-p38 MAPK, increased significantly (p<0.01, n=8) in lung and brain of 20-month-old mice. The activation of p38 MAPK in other tissues was not altered with age. Immunostaining showed that epithelial cells and alveolar macrophages in lung parenchyma were the major cellular sources of phospho-p38 MAPK immunity. As measured by enzyme-linked immunosorbent assay (ELISA), TNF-α, IL-1β and IL-6 in lung homogenates were elevated significantly with age, but there were no differences with age in serum levels except for IL-6. In addition, IL-1β and IL-6 were increased notably while TNF-α was not different with age in bronchoalveolar lavage fluid (BALF). Furthermore, the oxidant-antioxidant status was evaluated by measuring pro-oxidant malondialdehyde (MDA) levels and the activity of reactive oxygen species scavenging enzymes (i.e. superoxide dismutase (SOD) and glutathione (GSH)) in lung homogenates. The results showed that SOD and GSH decreased with age, while MDA did not change. In conclusion, our data demonstrate that p38 MAPK is activated during lung aging with a corresponding increase in pro-inflammatory cytokines and decrease in antioxidant capacity.
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Affiliation(s)
- Zongli Li
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, PR China
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39
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Kriete A, Lechner M, Clearfield D, Bohmann D. Computational systems biology of aging. WILEY INTERDISCIPLINARY REVIEWS-SYSTEMS BIOLOGY AND MEDICINE 2010; 3:414-28. [PMID: 21197651 DOI: 10.1002/wsbm.126] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Computational systems biology is expected to make major contributions to unravel the complex molecular mechanisms underlying the progression of aging in cells, tissues, and organisms. The development of computational approaches is, however, challenged by a wide spectrum of aging mechanisms participating on different levels of biological organization. The tight connectivity between the molecular constituents, functions, and cell states requires frameworks and strategies that extend beyond current practice to model, simulate, and predict the progression of aging and the emerging aging phenotypes. We provide a general overview of the specific computational tasks and opportunities in aging research, and discuss some illustrative systems level concepts in more detail. One example provided here is the assembly of a conceptual whole cell model that considers the temporal dynamics of the aging process grounded on molecular mechanisms. Another application is the assembly of interactomes, such as protein networks that allow us to analyze changes in network topology and interaction of proteins that have been implicated in aging with other cellular constituents and processes. We introduce the necessary key steps to build these applications and discuss their merits and future extensions for aging research. WIREs Syst Biol Med 2011 3 414-428 DOI: 10.1002/wsbm.126
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Affiliation(s)
- Andres Kriete
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Bossone Research Center, Philadelphia, PA, USA.
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40
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Srinivasan V, Kriete A, Sacan A, Jazwinski SM. Comparing the yeast retrograde response and NF-κB stress responses: implications for aging. Aging Cell 2010; 9:933-41. [PMID: 20961379 DOI: 10.1111/j.1474-9726.2010.00622.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The mitochondrial retrograde response has been extensively described in Saccharomyces cerevisiae, where it has been found to extend life span during times of mitochondrial dysfunction, damage or low nutrient levels. In yeast, the retrograde response genes (RTG) convey these stress responses to the nucleus to change the gene expression adaptively. Similarly, most classes of higher organisms have been shown to have some version of a central stress-mediating transcription factor, NF-κB. There have been several modifications along the phylogenetic tree as NF-κB has taken a larger role in managing cellular stresses. Here, we review similarities and differences in mechanisms and pathways between RTG genes in yeast and NF-κB as seen in more complex organisms. We perform a structural homology search and reveal similarities of Rtg proteins with eukaryotic transcription factors involved in development and metabolism. NF-κB shows more sophisticated functions when compared to RTG genes including participation in immune responses and induction of apoptosis under high levels of ROS-induced mitochondrial and nuclear DNA damage. Involvement of NF-κB in chromosomal stability, coregulation of mitochondrial respiration, and cross talk with the TOR (target of rapamycin) pathway points to a conserved mechanism also found in yeast.
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Affiliation(s)
- Visish Srinivasan
- Department of Biology, Drexel University, Philadelphia, PA 19104, USA
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41
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Kriete A, Bosl WJ, Booker G. Rule-based cell systems model of aging using feedback loop motifs mediated by stress responses. PLoS Comput Biol 2010; 6:e1000820. [PMID: 20585546 PMCID: PMC2887462 DOI: 10.1371/journal.pcbi.1000820] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2009] [Accepted: 05/18/2010] [Indexed: 01/01/2023] Open
Abstract
Investigating the complex systems dynamics of the aging process requires integration of a broad range of cellular processes describing damage and functional decline co-existing with adaptive and protective regulatory mechanisms. We evolve an integrated generic cell network to represent the connectivity of key cellular mechanisms structured into positive and negative feedback loop motifs centrally important for aging. The conceptual network is casted into a fuzzy-logic, hybrid-intelligent framework based on interaction rules assembled from a priori knowledge. Based upon a classical homeostatic representation of cellular energy metabolism, we first demonstrate how positive-feedback loops accelerate damage and decline consistent with a vicious cycle. This model is iteratively extended towards an adaptive response model by incorporating protective negative-feedback loop circuits. Time-lapse simulations of the adaptive response model uncover how transcriptional and translational changes, mediated by stress sensors NF-κB and mTOR, counteract accumulating damage and dysfunction by modulating mitochondrial respiration, metabolic fluxes, biosynthesis, and autophagy, crucial for cellular survival. The model allows consideration of lifespan optimization scenarios with respect to fitness criteria using a sensitivity analysis. Our work establishes a novel extendable and scalable computational approach capable to connect tractable molecular mechanisms with cellular network dynamics underlying the emerging aging phenotype. The global process of aging disturbs a broad range of cellular mechanisms in a complex fashion and is not well understood. One important goal of computational approaches in aging is to develop integrated models in terms of a unifying aging theory, predicting progression of aging phenotypes grounded on molecular mechanisms. However, current experimental data incoherently reflects many isolated processes from a large diversity of approaches, biological model systems, and species, which makes such integration a challenging task. In an attempt to close this gap, we iteratively develop a fuzzy-logic cell systems model considering the interplay of damage, metabolism, and signaling by positive and negative feedback-loop motifs using relationships drawn from literature data. Because cellular biodynamics may be considered a complex control system, this approach seems particularly suitable. Here, we demonstrate that rule-based fuzzy-logic models provide semi-quantitative predictions that enhance our understanding of complex and interlocked molecular mechanisms and their implications on the aging physiome.
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Affiliation(s)
- Andres Kriete
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Bossone Research Center, Philadelphia, Pennsylvania, United States of America.
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Zhan Y, Yuan L, Oettgen P. Alterations in transcriptional responses associated with vascular aging. JOURNAL OF INFLAMMATION-LONDON 2009; 6:16. [PMID: 19460151 PMCID: PMC2691401 DOI: 10.1186/1476-9255-6-16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/05/2009] [Accepted: 05/21/2009] [Indexed: 01/11/2023]
Abstract
Vascular aging is an independent risk factor for cardiovascular disease that can occur in the absence of other traditional risk factors. Inflammation is a hallmark of vascular aging that ultimately leads to structural changes in the vessel wall including an increase in medial thickness and perivascular fibrosis. Several classes of transcription factors have been identified that participate in the regulation of cellular responses associated with vascular aging. Nuclear factor (NF)-κB is the prototypic example of a transcriptional activator in the setting of inflammation, being activated in response to multiple inflammatory mediators including pro-inflammatory cytokines and bacterial endotoxin. In contrast, the activation of the nuclear hormone receptor and transcription factor peroxisome proliferator-activated receptor-alpha (PPAR-α) results in its translocation from the cell surface to the nucleus where it exerts anti-inflammatory effects. Vascular aging is also associated with endothelial dysfunction. One important repair mechanism for improving endothelial function is the recruitment of endothelial progenitor cells (EPCs). In the setting of aging the number of EPCs diminishes which has been linked to a decrease in the activity and/or expression of the transcription factor hypoxia inducible factor (HIF)-1 alpha. A change in the balance of the activity of pro-inflammatory transcription factors versus those that inhibit inflammation likely contributes to the process of vascular aging. The purpose of this review is to summarize our current knowledge of these age-related changes in transcriptional responses, and to discuss the therapeutic potential of targeting some of these factors.
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Affiliation(s)
- Yumei Zhan
- Division of Cardiology, and Molecular and Vascular Biology, Department of Medicine, Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.
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Batsi C, Markopoulou S, Vartholomatos G, Georgiou I, Kanavaros P, Gorgoulis VG, Marcu KB, Kolettas E. Chronic NF-kappaB activation delays RasV12-induced premature senescence of human fibroblasts by suppressing the DNA damage checkpoint response. Mech Ageing Dev 2009; 130:409-19. [PMID: 19406145 DOI: 10.1016/j.mad.2009.04.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2008] [Revised: 03/31/2009] [Accepted: 04/17/2009] [Indexed: 01/08/2023]
Abstract
Normal cells divide for a limited number of generations, after which they enter a state of irreversible growth arrest termed replicative senescence. While replicative senescence is due to telomere erosion, normal human fibroblasts can undergo stress-induced senescence in response to oncogene activation, termed oncogene-induced senescence (OIS). Both, replicative and OIS, initiate a DNA damage checkpoint response (DDR) resulting in the activation of the p53-p21(Cip1/Waf1) pathway. However, while the nuclear factor-kappaB (NF-kappaB) signaling pathway has been implicated in DDR, its role in OIS has not been investigated. Here, we show that oncogenic Ha-RasV12 promoted premature senescence of IMR-90 normal human diploid fibroblasts by activating DDR, hence verifying the classical model of OIS. However, enforced expression of a constitutively active IKKbeta T-loop mutant protein (IKKbetaca), significantly delayed OIS of IMR-90 cells by suppressing Ha-RasV12 instigated DDR. Thus, our experiments have uncovered an important selective advantage in chronically activating canonical NF-kappaB signaling to overcome the anti-proliferative OIS response of normal primary human fibroblasts.
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Affiliation(s)
- Christina Batsi
- Cell and Molecular Physiology Unit, Laboratory of Physiology, School of Medicine, University of Ioannina, Ioannina, Greece
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