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      Inflammation, epigenetics, and metabolism converge to cell senescence and ageing: the regulation and intervention

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          Abstract

          Remarkable progress in ageing research has been achieved over the past decades. General perceptions and experimental evidence pinpoint that the decline of physical function often initiates by cell senescence and organ ageing. Epigenetic dynamics and immunometabolic reprogramming link to the alterations of cellular response to intrinsic and extrinsic stimuli, representing current hotspots as they not only (re-)shape the individual cell identity, but also involve in cell fate decision. This review focuses on the present findings and emerging concepts in epigenetic, inflammatory, and metabolic regulations and the consequences of the ageing process. Potential therapeutic interventions targeting cell senescence and regulatory mechanisms, using state-of-the-art techniques are also discussed.

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          The Hallmarks of Aging

          Aging is characterized by a progressive loss of physiological integrity, leading to impaired function and increased vulnerability to death. This deterioration is the primary risk factor for major human pathologies, including cancer, diabetes, cardiovascular disorders, and neurodegenerative diseases. Aging research has experienced an unprecedented advance over recent years, particularly with the discovery that the rate of aging is controlled, at least to some extent, by genetic pathways and biochemical processes conserved in evolution. This Review enumerates nine tentative hallmarks that represent common denominators of aging in different organisms, with special emphasis on mammalian aging. These hallmarks are: genomic instability, telomere attrition, epigenetic alterations, loss of proteostasis, deregulated nutrient sensing, mitochondrial dysfunction, cellular senescence, stem cell exhaustion, and altered intercellular communication. A major challenge is to dissect the interconnectedness between the candidate hallmarks and their relative contributions to aging, with the final goal of identifying pharmaceutical targets to improve human health during aging, with minimal side effects. Copyright © 2013 Elsevier Inc. All rights reserved.
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            Induction of pluripotent stem cells from mouse embryonic and adult fibroblast cultures by defined factors.

            Differentiated cells can be reprogrammed to an embryonic-like state by transfer of nuclear contents into oocytes or by fusion with embryonic stem (ES) cells. Little is known about factors that induce this reprogramming. Here, we demonstrate induction of pluripotent stem cells from mouse embryonic or adult fibroblasts by introducing four factors, Oct3/4, Sox2, c-Myc, and Klf4, under ES cell culture conditions. Unexpectedly, Nanog was dispensable. These cells, which we designated iPS (induced pluripotent stem) cells, exhibit the morphology and growth properties of ES cells and express ES cell marker genes. Subcutaneous transplantation of iPS cells into nude mice resulted in tumors containing a variety of tissues from all three germ layers. Following injection into blastocysts, iPS cells contributed to mouse embryonic development. These data demonstrate that pluripotent stem cells can be directly generated from fibroblast cultures by the addition of only a few defined factors.
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              Inflammation and cancer.

              Recent data have expanded the concept that inflammation is a critical component of tumour progression. Many cancers arise from sites of infection, chronic irritation and inflammation. It is now becoming clear that the tumour microenvironment, which is largely orchestrated by inflammatory cells, is an indispensable participant in the neoplastic process, fostering proliferation, survival and migration. In addition, tumour cells have co-opted some of the signalling molecules of the innate immune system, such as selectins, chemokines and their receptors for invasion, migration and metastasis. These insights are fostering new anti-inflammatory therapeutic approaches to cancer development.
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                Author and article information

                Contributors
                wanghu19860315@163.com
                zhenyuju@163.com
                Journal
                Signal Transduct Target Ther
                Signal Transduct Target Ther
                Signal Transduction and Targeted Therapy
                Nature Publishing Group UK (London )
                2095-9907
                2059-3635
                28 June 2021
                28 June 2021
                2021
                : 6
                : 245
                Affiliations
                [1 ]GRID grid.410595.c, ISNI 0000 0001 2230 9154, Key Laboratory of Ageing and Cancer Biology of Zhejiang Province, Institute of Ageing Research, , Hangzhou Normal University School of Medicine, ; Hangzhou, China
                [2 ]GRID grid.258164.c, ISNI 0000 0004 1790 3548, Key Laboratory of Regenerative Medicine of Ministry of Education, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Institute of Ageing and Regenerative Medicine, , Jinan University, ; Guangzhou, China
                [3 ]GRID grid.239573.9, ISNI 0000 0000 9025 8099, Division of Pathology and Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital Medical Center, ; Cincinnati, OH USA
                [4 ]GRID grid.40263.33, ISNI 0000 0004 1936 9094, Department of Molecular Biology, Cell Biology and Biochemistry, , Brown University, ; Providence, RI USA
                Article
                646
                10.1038/s41392-021-00646-9
                8236488
                34176928
                808ea1b3-c0f5-458b-ac7d-d59e0ffbdf89
                © The Author(s) 2021

                Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 20 November 2020
                : 9 May 2021
                : 13 May 2021
                Funding
                Funded by: FundRef https://doi.org/10.13039/501100001809, National Natural Science Foundation of China (National Science Foundation of China);
                Award ID: 81525010
                Award ID: 82030039
                Award ID: 91749203
                Award ID: 82071572
                Award ID: 81901403
                Award ID: 81770155
                Award ID: 91749117
                Award ID: 82022026
                Award Recipient :
                Funded by: National Key Research and Development Program of China(2016YFA0100602, 2017YFA0103302, 2018YFA0109300); Innovative Team Program of Guangzhou Regenerative Medicine and Health Guangdong Laboratory (2018GZR110103002) and Program for Guangdong Introducing Innovative and Enterpreneurial Teams (2017ZT07S347).
                Funded by: Opening Project of Key Laboratory of Integrative Chinese and Western Medicine for the Diagnosis and Treatment of Circulatory Diseases of Zhejiang Province (2C32003)
                Funded by: Science Foundation for Distinguished Young Scholars of Guangdong Province (2019B151502008)
                Categories
                Review Article
                Custom metadata
                © The Author(s) 2021

                medical research,cell biology
                medical research, cell biology

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