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Pharmacological Approaches to Decelerate Aging: A Promising Path. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:4201533. [PMID: 35860429 PMCID: PMC9293537 DOI: 10.1155/2022/4201533] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 05/24/2022] [Accepted: 06/26/2022] [Indexed: 11/17/2022]
Abstract
Biological aging or senescence is a course in which cellular function decreases over a period of time and is a consequence of altered signaling mechanisms that are triggered in stressed cells leading to cell damage. Aging is among the principal risk factors for many chronic illnesses such as cancer, cardiovascular disorders, and neurodegenerative diseases. Taking this into account, targeting fundamental aging mechanisms therapeutically may effectively impact numerous chronic illnesses. Selecting ideal therapeutic options in order to hinder the process of aging and decelerate the progression of age-related diseases is valuable. Along therapeutic options, life style modifications may well render the process of aging. The process of aging is affected by alteration in many cellular and signaling pathways amid which mTOR, SIRT1, and AMPK pathways are the most emphasized. Herein, we have discussed the mechanisms of aging focusing mainly on the mentioned pathways as well as the role of inflammation and autophagy in aging. Moreover, drugs and natural products with antiaging properties are discussed in detail.
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2
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Jusic A, Thomas PB, Wettinger SB, Dogan S, Farrugia R, Gaetano C, Tuna BG, Pinet F, Robinson EL, Tual-Chalot S, Stellos K, Devaux Y. Noncoding RNAs in age-related cardiovascular diseases. Ageing Res Rev 2022; 77:101610. [PMID: 35338919 DOI: 10.1016/j.arr.2022.101610] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 01/28/2022] [Accepted: 03/15/2022] [Indexed: 11/01/2022]
Abstract
Cardiovascular diseases (CVDs) are the leading cause of morbidity and mortality in the adult population worldwide and represent a severe economic burden and public health concern. The majority of human genes do not code for proteins. However, noncoding transcripts play important roles in ageing that significantly increases the risk for CVDs. Noncoding RNAs (ncRNAs) are critical regulators of multiple biological processes related to ageing such as oxidative stress, mitochondrial dysfunction and chronic inflammation. NcRNAs are also involved in pathophysiological developments within the cardiovascular system including arrhythmias, cardiac hypertrophy, fibrosis, myocardial infarction and heart failure. In this review article, we cover the roles of ncRNAs in cardiovascular ageing and disease as well as their potential therapeutic applications in CVDs.
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3
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The Role of microRNAs in the Mammary Gland Development, Health, and Function of Cattle, Goats, and Sheep. Noncoding RNA 2021; 7:ncrna7040078. [PMID: 34940759 PMCID: PMC8708473 DOI: 10.3390/ncrna7040078] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/07/2021] [Accepted: 12/10/2021] [Indexed: 02/07/2023] Open
Abstract
Milk is an integral and therefore complex structural element of mammalian nutrition. Therefore, it is simple to conclude that lactation, the process of producing milk, is as complex as the mammary gland, the organ responsible for this biochemical activity. Nutrition, genetics, epigenetics, disease pathogens, climatic conditions, and other environmental variables all impact breast productivity. In the last decade, the number of studies devoted to epigenetics has increased dramatically. Reports are increasingly describing the direct participation of microRNAs (miRNAs), small noncoding RNAs that regulate gene expression post-transcriptionally, in the regulation of mammary gland development and function. This paper presents a summary of the current state of knowledge about the roles of miRNAs in mammary gland development, health, and functions, particularly during lactation. The significance of miRNAs in signaling pathways, cellular proliferation, and the lipid metabolism in agricultural ruminants, which are crucial in light of their role in the nutrition of humans as consumers of dairy products, is discussed.
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4
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Song S, Johnson KS, Lujan H, Pradhan SH, Sayes CM, Taube JH. Nanoliposomal Delivery of MicroRNA-203 Suppresses Migration of Triple-Negative Breast Cancer through Distinct Target Suppression. Noncoding RNA 2021; 7:45. [PMID: 34449670 PMCID: PMC8395754 DOI: 10.3390/ncrna7030045] [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: 05/11/2021] [Revised: 07/14/2021] [Accepted: 07/21/2021] [Indexed: 02/07/2023] Open
Abstract
Triple-negative breast cancers affect thousands of women in the United States and disproportionately drive mortality from breast cancer. MicroRNAs are small, non-coding RNAs that negatively regulate gene expression post-transcriptionally by inhibiting target mRNA translation or by promoting mRNA degradation. We have identified that miRNA-203, silenced by epithelial-mesenchymal transition (EMT), is a tumor suppressor and can promote differentiation of breast cancer stem cells. In this study, we tested the ability of liposomal delivery of miR-203 to reverse aspects of breast cancer pathogenesis using breast cancer and EMT cell lines. We show that translationally relevant methods for increasing miR-203 abundance within a target tissue affects cellular properties associated with cancer progression. While stable miR-203 expression suppresses LASP1 and survivin, nanoliposomal delivery suppresses BMI1, indicating that suppression of distinct mRNA target profiles can lead to loss of cancer cell migration.
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Affiliation(s)
- Shuxuan Song
- Department of Biology, Baylor University, Waco, TX 76706, USA; (S.S.); (K.S.J.)
| | - Kelsey S. Johnson
- Department of Biology, Baylor University, Waco, TX 76706, USA; (S.S.); (K.S.J.)
| | - Henry Lujan
- Department of Environmental Science, Baylor University, Waco, TX 76706, USA; (H.L.); (S.H.P.); (C.M.S.)
| | - Sahar H. Pradhan
- Department of Environmental Science, Baylor University, Waco, TX 76706, USA; (H.L.); (S.H.P.); (C.M.S.)
| | - Christie M. Sayes
- Department of Environmental Science, Baylor University, Waco, TX 76706, USA; (H.L.); (S.H.P.); (C.M.S.)
| | - Joseph H. Taube
- Department of Biology, Baylor University, Waco, TX 76706, USA; (S.S.); (K.S.J.)
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5
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Abstract
Despite the decline in death rate from breast cancer and recent advances in targeted therapies and combinations for the treatment of metastatic disease, metastatic breast cancer remains the second leading cause of cancer-associated death in U.S. women. The invasion-metastasis cascade involves a number of steps and multitudes of proteins and signaling molecules. The pathways include invasion, intravasation, circulation, extravasation, infiltration into a distant site to form a metastatic niche, and micrometastasis formation in a new environment. Each of these processes is regulated by changes in gene expression. Noncoding RNAs including microRNAs (miRNAs) are involved in breast cancer tumorigenesis, progression, and metastasis by post-transcriptional regulation of target gene expression. miRNAs can stimulate oncogenesis (oncomiRs), inhibit tumor growth (tumor suppressors or miRsupps), and regulate gene targets in metastasis (metastamiRs). The goal of this review is to summarize some of the key miRNAs that regulate genes and pathways involved in metastatic breast cancer with an emphasis on estrogen receptor α (ERα+) breast cancer. We reviewed the identity, regulation, human breast tumor expression, and reported prognostic significance of miRNAs that have been documented to directly target key genes in pathways, including epithelial-to-mesenchymal transition (EMT) contributing to the metastatic cascade. We critically evaluated the evidence for metastamiRs and their targets and miRNA regulation of metastasis suppressor genes in breast cancer progression and metastasis. It is clear that our understanding of miRNA regulation of targets in metastasis is incomplete.
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Affiliation(s)
- Belinda J Petri
- Department of Biochemistry and Molecular Genetics, University of Louisville School of Medicine, Louisville, KY, 40292, USA
| | - Carolyn M Klinge
- Department of Biochemistry and Molecular Genetics, University of Louisville School of Medicine, Louisville, KY, 40292, USA.
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6
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Torma F, Gombos Z, Jokai M, Berkes I, Takeda M, Mimura T, Radak Z, Gyori F. The roles of microRNA in redox metabolism and exercise-mediated adaptation. JOURNAL OF SPORT AND HEALTH SCIENCE 2020; 9:405-414. [PMID: 32780693 PMCID: PMC7498669 DOI: 10.1016/j.jshs.2020.03.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Revised: 01/03/2020] [Accepted: 02/10/2020] [Indexed: 05/10/2023]
Abstract
MicroRNAs (miRs) are small regulatory RNA transcripts capable of post-transcriptional silencing of mRNA messages by entering a cellular bimolecular apparatus called RNA-induced silencing complex. miRs are involved in the regulation of cellular processes producing, eliminating or repairing the damage caused by reactive oxygen species, and they are active players in redox homeostasis. Increased mitochondrial biogenesis, function and hypertrophy of skeletal muscle are important adaptive responses to regular exercise. In the present review, we highlight some of the redox-sensitive regulatory roles of miRs.
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Affiliation(s)
- Ferenc Torma
- Research Center of Molecular Exercise Science, University of Physical Education, Budapest 1123, Hungary
| | - Zoltan Gombos
- Research Center of Molecular Exercise Science, University of Physical Education, Budapest 1123, Hungary
| | - Matyas Jokai
- Research Center of Molecular Exercise Science, University of Physical Education, Budapest 1123, Hungary
| | - Istvan Berkes
- Research Center of Molecular Exercise Science, University of Physical Education, Budapest 1123, Hungary
| | - Masaki Takeda
- Faculty of Health and Sports Science, Doshisha University, Kyotanabe 610-0394, Japan
| | - Tatsuya Mimura
- Faculty of Sport and Health Sciences, Osaka Sangyo University, Osaka 573-1004, Japan
| | - Zsolt Radak
- Research Center of Molecular Exercise Science, University of Physical Education, Budapest 1123, Hungary; Faculty of Sport Sciences, Waseda University, Tokorozawa, Saitama 359-1192, Japan; Institute of Physical Education and Sport Science, JGYPK, University of Szeged, Szeged 6726, Hungary.
| | - Ferenc Gyori
- Institute of Physical Education and Sport Science, JGYPK, University of Szeged, Szeged 6726, Hungary
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7
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Hernández-Saavedra D, Moody L, Xu GB, Chen H, Pan YX. Epigenetic Regulation of Metabolism and Inflammation by Calorie Restriction. Adv Nutr 2019; 10:520-536. [PMID: 30915465 PMCID: PMC6520046 DOI: 10.1093/advances/nmy129] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 11/26/2018] [Accepted: 12/17/2018] [Indexed: 12/16/2022] Open
Abstract
Chronic caloric restriction (CR) without malnutrition is known to affect different cellular processes such as stem cell function, cell senescence, inflammation, and metabolism. Despite the differences in the implementation of CR, the reduction of calories produces a widespread beneficial effect in noncommunicable chronic diseases, which can be explained by improvements in immuno-metabolic adaptation. Cellular adaptation that occurs in response to dietary patterns can be explained by alterations in epigenetic mechanisms such as DNA methylation, histone modifications, and microRNA. In this review, we define these modifications and systematically summarize the current evidence related to CR and the epigenome. We then explain the significance of genome-wide epigenetic modifications in the context of disease development. Although substantial evidence exists for the widespread effect of CR on longevity, there is no consensus regarding the epigenetic regulations of the underlying cellular mechanisms that lead to improved health. We provide compelling evidence that CR produces long-lasting epigenetic effects that mediate expression of genes related to immuno-metabolic processes. Epigenetic reprogramming of the underlying chronic low-grade inflammation by CR can lead to immuno-metabolic adaptations that enhance quality of life, extend lifespan, and delay chronic disease onset.
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Affiliation(s)
| | | | - Guanying Bianca Xu
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL
| | - Hong Chen
- Division of Nutritional Sciences,Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL
| | - Yuan-Xiang Pan
- Division of Nutritional Sciences,Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL,Address correspondence to Y-XP (e-mail: )
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8
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Caveolin-1 as a pathophysiological factor and target in psoriasis. NPJ Aging Mech Dis 2019; 5:4. [PMID: 30729030 PMCID: PMC6363785 DOI: 10.1038/s41514-019-0034-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 01/03/2019] [Indexed: 12/14/2022] Open
Abstract
Low expression of caveolin-1 (Cav-1) is typical in psoriatic lesions and overexpression of Cav-1 leads to a reduction of inflammation and suppression of epidermal hyperproliferation, thus ameliorating these two well-known hallmarks of psoriasis. At the same time, the interfacial layers of the white adipose tissue (WAT) adjacent to psoriatic lesions demonstrate much higher stiffness, which also points to a modification of Cav-1 expression in this tissue. These processes are connected with each other and regulated via exosomal exchange. Here we discuss the role of Cav-1 expression in inflammatory and hyperproliferative processes and analyze the ways to provide spatially different modulation of Cav-1 expression in the skin and WAT. Such modulation can be induced by different pharmacological and physical factors. These include application of mechanical stress and supra-physiological temperatures. Cav-1 should therefore be considered as an important target in treatment of psoriasis.
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9
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Xu M, Gan T, Ning H, Wang L. MicroRNA Functions in Thymic Biology: Thymic Development and Involution. Front Immunol 2018; 9:2063. [PMID: 30254640 PMCID: PMC6141719 DOI: 10.3389/fimmu.2018.02063] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 08/21/2018] [Indexed: 01/02/2023] Open
Abstract
During the entire processes of thymus organogenesis, maturation, and involution, gene regulation occurs post-transcriptionally via recently discovered microRNA (miRNA) transcripts. Numerous reports indicate that miRNAs may be involved in the construction of a normal thymic microenvironment, which constitutes a critical component to support T lymphocyte development. MiRNAs are also expressed in thymic stromal cells including thymic epithelial cells (TECs) during maturation and senescence. This review focuses on the function of miRNAs in thymic development and involution. A better understanding of these processes will provide new insights into the regulatory network of TECs and further comprehension of how genes control TECs to maintain the thymic microenvironment during thymus development and aging, thus supporting a normal cellular immune system.
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Affiliation(s)
- Minwen Xu
- First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Tao Gan
- Department of Biotechnology, Gannan Medical University, Ganzhou, China
| | - Huiting Ning
- Department of Biotechnology, Gannan Medical University, Ganzhou, China
| | - Liefeng Wang
- Department of Biotechnology, Gannan Medical University, Ganzhou, China
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10
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Russell J, Du Toit EF, Peart JN, Patel HH, Headrick JP. Myocyte membrane and microdomain modifications in diabetes: determinants of ischemic tolerance and cardioprotection. Cardiovasc Diabetol 2017; 16:155. [PMID: 29202762 PMCID: PMC5716308 DOI: 10.1186/s12933-017-0638-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 11/22/2017] [Indexed: 02/06/2023] Open
Abstract
Cardiovascular disease, predominantly ischemic heart disease (IHD), is the leading cause of death in diabetes mellitus (DM). In addition to eliciting cardiomyopathy, DM induces a ‘wicked triumvirate’: (i) increasing the risk and incidence of IHD and myocardial ischemia; (ii) decreasing myocardial tolerance to ischemia–reperfusion (I–R) injury; and (iii) inhibiting or eliminating responses to cardioprotective stimuli. Changes in ischemic tolerance and cardioprotective signaling may contribute to substantially higher mortality and morbidity following ischemic insult in DM patients. Among the diverse mechanisms implicated in diabetic impairment of ischemic tolerance and cardioprotection, changes in sarcolemmal makeup may play an overarching role and are considered in detail in the current review. Observations predominantly in animal models reveal DM-dependent changes in membrane lipid composition (cholesterol and triglyceride accumulation, fatty acid saturation vs. reduced desaturation, phospholipid remodeling) that contribute to modulation of caveolar domains, gap junctions and T-tubules. These modifications influence sarcolemmal biophysical properties, receptor and phospholipid signaling, ion channel and transporter functions, contributing to contractile and electrophysiological dysfunction, cardiomyopathy, ischemic intolerance and suppression of protective signaling. A better understanding of these sarcolemmal abnormalities in types I and II DM (T1DM, T2DM) can inform approaches to limiting cardiomyopathy, associated IHD and their consequences. Key knowledge gaps include details of sarcolemmal changes in models of T2DM, temporal patterns of lipid, microdomain and T-tubule changes during disease development, and the precise impacts of these diverse sarcolemmal modifications. Importantly, exercise, dietary, pharmacological and gene approaches have potential for improving sarcolemmal makeup, and thus myocyte function and stress-resistance in this ubiquitous metabolic disorder.
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Affiliation(s)
- Jake Russell
- Menzies Health Institute Queensland, Griffith University, Southport, QLD, Australia
| | - Eugene F Du Toit
- Menzies Health Institute Queensland, Griffith University, Southport, QLD, Australia
| | - Jason N Peart
- Menzies Health Institute Queensland, Griffith University, Southport, QLD, Australia
| | - Hemal H Patel
- VA San Diego Healthcare System and Department of Anesthesiology, University of California San Diego, San Diego, USA
| | - John P Headrick
- Menzies Health Institute Queensland, Griffith University, Southport, QLD, Australia. .,School of Medical Science, Griffith University, Southport, QLD, 4217, Australia.
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11
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Xiong J, Wang D, Wei A, Lu H, Tan C, Li A, Tang J, Wang Y, He S, Liu X, Hu W. Deregulated expression of miR-107 inhibits metastasis of PDAC through inhibition PI3K/Akt signaling via caveolin-1 and PTEN. Exp Cell Res 2017; 361:316-323. [PMID: 29111166 DOI: 10.1016/j.yexcr.2017.10.033] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 10/23/2017] [Accepted: 10/26/2017] [Indexed: 02/05/2023]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) displays a highly aggressive malignancy and is considered to be an incurable and rapidly lethal disease. MicroRNAs (miRNAs) are small non-coding RNAs of approximately nucleotides that regulate several aspects of tumors pathogenesis, including migration, invasion, metastasis and epithelial-mesenchymal transition. We have found that miR-107 was significantly high expression in PDAC tissues and cells. High miR-107 expression is associated with poor clinicopathological parameters and prognosis in PDAC patients. Deregulated expression of miR-107 in PDAC cells (AsPC-1 and Panc-1) is sufficient to reduce cell migration and invasion, and to induce upregulation of epithelial markers (β-catenin, ZO-1 and E-cadherin) and a decrease of mesenchymal marker expression (ZEB-1 and vimentin). We also found that the caveolin-1, PTEN and p-Akt expression are modulated by miR-107 in PDAC cells. Moreover, our study clearly demonstrated that deregulated expression of miR-107 inhibited cell migration and invasion and EMT by up-regulation of caveolin-1 and PTEN, and inhibition of PI3K/Akt signaling in PDAC cells. Our study suggested that miR‑107 expression might both be a useful indicator of the metastatic potential and provided a new potential therapeutic target in PDAC.
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Affiliation(s)
- Junjie Xiong
- Department of Pancreatic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Dan Wang
- Department of Respiratory and Critical Care Medicine, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Ailin Wei
- Department of Pancreatic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China; Key Laboratory of Transplant Engineering and Immunology, Ministry of Health, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, China
| | - Huimin Lu
- Department of Pancreatic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Chunlu Tan
- Department of Pancreatic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Ang Li
- Department of Pancreatic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Jie Tang
- State Key Laboratory of biotherapy, Sichuan University, Chengdu, China
| | - Yichao Wang
- Department of Thyroid Surgery, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Sirong He
- Department of Immunology, College of Basic Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Xubao Liu
- Department of Pancreatic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Weiming Hu
- Department of Pancreatic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China.
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12
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Abraham KJ, Ostrowski LA, Mekhail K. Non-Coding RNA Molecules Connect Calorie Restriction and Lifespan. J Mol Biol 2017; 429:3196-3214. [DOI: 10.1016/j.jmb.2016.08.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 08/10/2016] [Accepted: 08/15/2016] [Indexed: 01/05/2023]
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13
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MicroRNAs Regulate Thymic Epithelium in Age-Related Thymic Involution via Down- or Upregulation of Transcription Factors. J Immunol Res 2017; 2017:2528957. [PMID: 29226156 PMCID: PMC5684555 DOI: 10.1155/2017/2528957] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 08/09/2017] [Accepted: 08/20/2017] [Indexed: 12/14/2022] Open
Abstract
Age-related thymic involution is primarily induced by defects in nonhematopoietic thymic epithelial cells (TECs). It is characterized by dysfunction of multiple transcription factors (TFs), such as p63 and FoxN1, and also involves other TEC-associated regulators, such as Aire. These TFs and regulators are controlled by complicated regulatory networks, in which microRNAs (miRNAs) act as a key player. miRNAs can either directly target the 3'-UTRs (untranslated regions) of the TFs to suppress TF expression or target TF inhibitors to reduce or increase TF inhibitor expression and thereby indirectly enhance or inhibit TF expression. Here, we review the current understanding and recent studies about how miRNAs are involved in age-related thymic involution via regulation of TEC-autonomous TFs. We also discuss potential strategies for targeting miRNAs to rejuvenate age-related declined thymic function.
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14
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MicroRNAs miR-203-3p, miR-664-3p and miR-708-5p are associated with median strain lifespan in mice. Sci Rep 2017; 7:44620. [PMID: 28304372 PMCID: PMC5356331 DOI: 10.1038/srep44620] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 02/10/2017] [Indexed: 02/07/2023] Open
Abstract
MicroRNAs (miRNAs) are small non-coding RNA species that have been shown to have roles in multiple processes that occur in higher eukaryotes. They act by binding to specific sequences in the 3’ untranslated region of their target genes and causing the transcripts to be degraded by the RNA-induced silencing complex (RISC). MicroRNAs have previously been reported to demonstrate altered expression in several aging phenotypes such as cellular senescence and age itself. Here, we have measured the expression levels of 521 small regulatory microRNAs (miRNAs) in spleen tissue from young and old animals of 6 mouse strains with different median strain lifespans by quantitative real-time PCR. Expression levels of 3 microRNAs were robustly associated with strain lifespan, after correction for multiple statistical testing (miR-203-3p [β-coefficient = −0.6447, p = 4.8 × 10−11], miR-664-3p [β-coefficient = 0.5552, p = 5.1 × 10−8] and miR-708-5p [β-coefficient = 0.4986, p = 1.6 × 10−6]). Pathway analysis of binding sites for these three microRNAs revealed enrichment of target genes involved in key aging and longevity pathways including mTOR, FOXO and MAPK, most of which also demonstrated associations with longevity. Our results suggests that miR-203-3p, miR-664-3p and miR-708-5p may be implicated in pathways determining lifespan in mammals.
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15
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Mantel PY, Hjelmqvist D, Walch M, Kharoubi-Hess S, Nilsson S, Ravel D, Ribeiro M, Grüring C, Ma S, Padmanabhan P, Trachtenberg A, Ankarklev J, Brancucci NM, Huttenhower C, Duraisingh MT, Ghiran I, Kuo WP, Filgueira L, Martinelli R, Marti M. Infected erythrocyte-derived extracellular vesicles alter vascular function via regulatory Ago2-miRNA complexes in malaria. Nat Commun 2016; 7:12727. [PMID: 27721445 PMCID: PMC5062468 DOI: 10.1038/ncomms12727] [Citation(s) in RCA: 171] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Accepted: 07/28/2016] [Indexed: 12/19/2022] Open
Abstract
Malaria remains one of the greatest public health challenges worldwide, particularly in sub-Saharan Africa. The clinical outcome of individuals infected with Plasmodium falciparum parasites depends on many factors including host systemic inflammatory responses, parasite sequestration in tissues and vascular dysfunction. Production of pro-inflammatory cytokines and chemokines promotes endothelial activation as well as recruitment and infiltration of inflammatory cells, which in turn triggers further endothelial cell activation and parasite sequestration. Inflammatory responses are triggered in part by bioactive parasite products such as hemozoin and infected red blood cell-derived extracellular vesicles (iRBC-derived EVs). Here we demonstrate that such EVs contain functional miRNA-Argonaute 2 complexes that are derived from the host RBC. Moreover, we show that EVs are efficiently internalized by endothelial cells, where the miRNA-Argonaute 2 complexes modulate target gene expression and barrier properties. Altogether, these findings provide a mechanistic link between EVs and vascular dysfunction during malaria infection.
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Affiliation(s)
- Pierre-Yves Mantel
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA.,Department of Medicine, Unit of Anatomy, University of Fribourg, 1700 Fribourg, Switzerland
| | - Daisy Hjelmqvist
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA
| | - Michael Walch
- Department of Medicine, Unit of Anatomy, University of Fribourg, 1700 Fribourg, Switzerland
| | - Solange Kharoubi-Hess
- Department of Medicine, Unit of Anatomy, University of Fribourg, 1700 Fribourg, Switzerland
| | - Sandra Nilsson
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA
| | - Deepali Ravel
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA
| | - Marina Ribeiro
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA
| | - Christof Grüring
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA
| | - Siyuan Ma
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA
| | - Prasad Padmanabhan
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA
| | - Alexander Trachtenberg
- Harvard Catalyst Laboratory for Innovative Translational Technologies, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Johan Ankarklev
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA
| | - Nicolas M Brancucci
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA.,Wellcome Trust Center for Molecular Parasitology, University of Glasgow, Glasgow G12 8TA, UK
| | - Curtis Huttenhower
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA
| | - Manoj T Duraisingh
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA
| | - Ionita Ghiran
- Division of Allergy and Infection, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02115, USA
| | - Winston P Kuo
- Harvard Catalyst Laboratory for Innovative Translational Technologies, Harvard Medical School, Boston, Massachusetts 02115, USA.,Predicine, Inc., Hayward, California 94545, USA
| | - Luis Filgueira
- Department of Medicine, Unit of Anatomy, University of Fribourg, 1700 Fribourg, Switzerland
| | - Roberta Martinelli
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02115, USA
| | - Matthias Marti
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA.,Wellcome Trust Center for Molecular Parasitology, University of Glasgow, Glasgow G12 8TA, UK
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16
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Anwar SL, Wahyono A, Aryandono T, Haryono SJ. Caveolin-1 in Breast Cancer: Single Molecule Regulation of Multiple Key Signaling Pathways. Asian Pac J Cancer Prev 2016; 16:6803-12. [PMID: 26514450 DOI: 10.7314/apjcp.2015.16.16.6803] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Caveolin-1 is a 22-kD trans-membrane protein enriched in particular plasma membrane invaginations known as caveolae. Cav-1 expression is often dysregulated in human breast cancers, being commonly upregulated in cancer cells and downregulated in stromal cells. As an intracellular scaffolding protein, Cav-1, is involved in several vital biological regulations including endocytosis, transcytosis, vesicular transport, and signaling pathways. Several pathways are modulated by Cav-1 including estrogen receptor, EGFR, Her2/neu, TGFβ, and mTOR and represent as major drivers in mammary carcinogenesis. Expression and role of Cav-1 in breast carcinogenesis is highly variable depending on the stage of tumor development as well as context of the cell. However, recent data have shown that downregulation of Cav-1 expression in stromal breast tumors is associated with frequent relapse, resistance to therapy, and poor outcome. Modification of Cav-1 expression for translational cancer therapy is particularly challenging since numerous signaling pathways might be affected. This review focuses on present understanding of Cav-1 in breast carcinogenesis and its potential role as a new biomarker for predicting therapeutic response and prognosis as well as new target for therapeutic manipulation.
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Affiliation(s)
- Sumadi Lukman Anwar
- Department of Surgery, Faculty of Medicine, Universitas Gadjah Mada, Yogyakarta, Indonesia E-mail :
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17
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Varshney P, Yadav V, Saini N. Lipid rafts in immune signalling: current progress and future perspective. Immunology 2016; 149:13-24. [PMID: 27153983 DOI: 10.1111/imm.12617] [Citation(s) in RCA: 188] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 04/22/2016] [Accepted: 04/28/2016] [Indexed: 12/15/2022] Open
Abstract
Lipid rafts are dynamic assemblies of proteins and lipids that harbour many receptors and regulatory molecules and so act as a platform for signal transduction. They float freely within the liquid-disordered bilayer of cellular membranes and can cluster to form larger ordered domains. Alterations in lipid rafts are commonly found to be associated with the pathogenesis of several human diseases and recent reports have shown that the raft domains can also be perturbed by targeting raft proteins through microRNAs. Over the last few years, the importance of lipid rafts in modulating both innate and acquired immune responses has been elucidated. Various receptors present on immune cells like B cells, T cells, basophils and mast cells associate with lipid rafts on ligand binding and initiate signalling cascades leading to inflammation. Furthermore, disrupting lipid raft integrity alters lipopolysaccharide-induced cytokine secretion, IgE signalling, and B-cell and T-cell activation. The objective of this review is to summarize the recent progress in understanding the role of lipid rafts in the modulation of immune signalling and its related therapeutic potential for autoimmune diseases and inflammatory disorders.
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Affiliation(s)
- Pallavi Varshney
- Functional Genomics Unit, CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB), Delhi, India.,Academy of Scientific & Innovative Research, CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB), Delhi, India
| | - Vikas Yadav
- Functional Genomics Unit, CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB), Delhi, India
| | - Neeru Saini
- Functional Genomics Unit, CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB), Delhi, India.,Academy of Scientific & Innovative Research, CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB), Delhi, India
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18
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Zhang Y, Zhou SY, Yan HZ, Xu DD, Chen HX, Wang XY, Wang X, Liu YT, Zhang L, Wang S, Zhou PJ, Fu WY, Ruan BB, Ma DL, Wang Y, Liu QY, Ren Z, Liu Z, Zhang R, Wang YF. miR-203 inhibits proliferation and self-renewal of leukemia stem cells by targeting survivin and Bmi-1. Sci Rep 2016; 6:19995. [PMID: 26847520 PMCID: PMC4742816 DOI: 10.1038/srep19995] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 12/22/2015] [Indexed: 12/12/2022] Open
Abstract
Drug resistance is one of the leading causes of failed cancer therapy in the treatment of acute myeloid leukemia. Although the mechanisms of resistance are poorly understood, they may be related to the presence of leukemia stem cells (LSCs). Down-regulation of the miR-203 reportedly contributes to oncogenesis and chemo-resistance in multiple cancers. We found that miR-203 expression was down-regulated in CD34 + AML cells as compared with CD34− cells isolated from patients as well as in LSC-enriched (CD34 + CD38−) cell lines KG-1a or MOLM13. Additionally, re-expression of miR-203 led to decreased cell proliferation, self-renewal, and sphere formation in LSCs. Moreover, miR-203 was found to directly target the 3′un-translated regions of survivin and Bmi-1 mRNAs affecting proliferation and self-renewal in LSCs. In this study, we identified a novel miR-203/survivin/Bmi-1 axis involved in the regulation of biological properties of LSCs. This axis may represent a new therapeutic target for acute myeloid leukemia and a potential prognosis/diagnostic marker for LSCs therapy.
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Affiliation(s)
- Yi Zhang
- College of life science and technology, Jinan University, Guangzhou, 510632, P.R. China.,Institute of Biomedicine, Jinan University, Guangzhou, 510632, P.R. China.,Section of Otolaryngology, Department of Surgery, Yale School of Medicine, U.S.A
| | - Shu-yan Zhou
- Department of Pathological Physiology, Wan-nan Medical College, Wuhu, 241000, P.R. China
| | - Hai-zhao Yan
- College of life science and technology, Jinan University, Guangzhou, 510632, P.R. China
| | - Dan-dan Xu
- College of life science and technology, Jinan University, Guangzhou, 510632, P.R. China
| | - Hai-xuan Chen
- College of medicine, Jinan University, Guangzhou, 510632, P.R. China
| | - Xiao-yan Wang
- Institute of Biomedicine, Jinan University, Guangzhou, 510632, P.R. China
| | - Xiao Wang
- Institute of Biomedicine, Jinan University, Guangzhou, 510632, P.R. China
| | - Yu-ting Liu
- College of life science and technology, Jinan University, Guangzhou, 510632, P.R. China
| | - Li Zhang
- College of life science and technology, Jinan University, Guangzhou, 510632, P.R. China
| | - Sheng Wang
- College of life science and technology, Jinan University, Guangzhou, 510632, P.R. China
| | - Peng-jun Zhou
- Department of Pathogen Biology and Immunology, Medical College, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Wu-yu Fu
- Department of Pathogen Biology and Immunology, Medical College, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Bi-bo Ruan
- Department of Pathogen Biology and Immunology, Medical College, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Dong-lei Ma
- College of life science and technology, Jinan University, Guangzhou, 510632, P.R. China
| | - Ying Wang
- College of life science and technology, Jinan University, Guangzhou, 510632, P.R. China
| | - Qiu-ying Liu
- Institute of Biomedicine, Jinan University, Guangzhou, 510632, P.R. China
| | - Zhe Ren
- Institute of Biomedicine, Jinan University, Guangzhou, 510632, P.R. China
| | - Zhong Liu
- Institute of Biomedicine, Jinan University, Guangzhou, 510632, P.R. China
| | - Rong Zhang
- Department of Endoscopy, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China,Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510632, P.R. China
| | - Yi-fei Wang
- College of life science and technology, Jinan University, Guangzhou, 510632, P.R. China.,Institute of Biomedicine, Jinan University, Guangzhou, 510632, P.R. China
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19
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Food Deprivation Affects the miRNome in the Lactating Goat Mammary Gland. PLoS One 2015; 10:e0140111. [PMID: 26473604 PMCID: PMC4608672 DOI: 10.1371/journal.pone.0140111] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 09/22/2015] [Indexed: 11/19/2022] Open
Abstract
Background Nutrition affects milk composition thus influencing its nutritional properties. Nutrition also modifies the expression of mammary genes, whose regulation is not fully understood. MicroRNAs (miRNA) are small non coding RNA which are important post-transcriptional regulators of gene expression by targeting messenger RNAs. Our goal was to characterize miRNA whose expression is regulated by nutrition in the lactating goat mammary gland, which may provide clues to deciphering regulations of the biosynthesis and secretion of milk components. Methodology/principal findings Using high-throughput sequencing technology, miRNomes of the lactating mammary gland were established from lactating goats fed ad libitum or deprived of food for 48h affecting milk production and composition. High throughput miRNA sequencing revealed 30 miRNA with an expression potentially modulated by food deprivation; 16 were down-regulated and 14 were up-regulated. Diana-microT predictive tools suggested a potential role for several nutriregulated miRNA in lipid metabolism. Among the putative targets, 19 were previously identified as differently expressed genes (DEG). The functions of these 19 DEG revealed, notably, their involvement in tissue remodelling. Conclusion/significance In conclusion, this study offers the first evidence of nutriregulated miRNA in the ruminant mammary gland. Characterization of these 30 miRNA could contribute to a clearer understanding of gene regulation in the mammary gland in response to nutrition.
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20
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Conde-Perez A, Gros G, Longvert C, Pedersen M, Petit V, Aktary Z, Viros A, Gesbert F, Delmas V, Rambow F, Bastian BC, Campbell AD, Colombo S, Puig I, Bellacosa A, Sansom O, Marais R, Van Kempen LCLT, Larue L. A caveolin-dependent and PI3K/AKT-independent role of PTEN in β-catenin transcriptional activity. Nat Commun 2015; 6:8093. [PMID: 26307673 PMCID: PMC4560817 DOI: 10.1038/ncomms9093] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 07/16/2015] [Indexed: 12/22/2022] Open
Abstract
Loss of the tumour suppressor PTEN is frequent in human melanoma, results in MAPK activation, suppresses senescence and mediates metastatic behaviour. How PTEN loss mediates these effects is unknown. Here we show that loss of PTEN in epithelial and melanocytic cell lines induces the nuclear localization and transcriptional activation of β-catenin independent of the PI3K-AKT-GSK3β axis. The absence of PTEN leads to caveolin-1 (CAV1)-dependent β-catenin transcriptional modulation in vitro, cooperates with NRAS(Q61K) to initiate melanomagenesis in vivo and induces efficient metastasis formation associated with E-cadherin internalization. The CAV1-β-catenin axis is mediated by a feedback loop in which β-catenin represses transcription of miR-199a-5p and miR-203, which suppress the levels of CAV1 mRNA in melanoma cells. These data reveal a mechanism by which loss of PTEN increases CAV1-mediated dissociation of β-catenin from membranous E-cadherin, which may promote senescence bypass and metastasis.
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Affiliation(s)
- Alejandro Conde-Perez
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Gwendoline Gros
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Christine Longvert
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Malin Pedersen
- Targeted Therapy Team, The Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, UK
| | - Valérie Petit
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Zackie Aktary
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Amaya Viros
- Molecular Oncology Group, Cancer Research UK Manchester Institute, The University of Manchester, Wilmslow Road, Manchester M20 4BX, UK
| | - Franck Gesbert
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Véronique Delmas
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Florian Rambow
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Boris C Bastian
- Departments of Dermatology and Pathology and UCSF Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94143, USA
| | | | - Sophie Colombo
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Isabel Puig
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | | | - Owen Sansom
- The Beatson Institute for Cancer Research, Glasgow G61 1BD, UK
| | - Richard Marais
- Molecular Oncology Group, Cancer Research UK Manchester Institute, The University of Manchester, Wilmslow Road, Manchester M20 4BX, UK
| | - Leon C L T Van Kempen
- Department of Pathology, Radboud University Nijmegen Medical Centre, Nijmegen 6500 HB, The Netherlands
- Jewish General Hospital, Lady Davis Institute for Medical Research, Montreal, Quebec QC H3T 1E2, Canada
- Department of Pathology, McGill University, Montreal, Quebec QC H3T 1E2, Canada
| | - Lionel Larue
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
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21
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Kim JD, Lee A, Choi J, Park Y, Kang H, Chang W, Lee MS, Kim J. Epigenetic modulation as a therapeutic approach for pulmonary arterial hypertension. Exp Mol Med 2015; 47:e175. [PMID: 26228095 PMCID: PMC4525299 DOI: 10.1038/emm.2015.45] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Pulmonary arterial hypertension (PAH) is a rare but progressive and currently incurable disease, which is characterized by vascular remodeling in association with muscularization of the arterioles, medial thickening and plexiform lesion formation. Despite our advanced understanding of the pathogenesis of PAH and the recent therapeutic advances, PAH still remains a fatal disease. In addition, the susceptibility to PAH has not yet been adequately explained. Much evidence points to the involvement of epigenetic changes in the pathogenesis of a number of human diseases including cancer, peripheral hypertension and asthma. The knowledge gained from the epigenetic study of various human diseases can also be applied to PAH. Thus, the pursuit of novel therapeutic targets via understanding the epigenetic alterations involved in the pathogenesis of PAH, such as DNA methylation, histone modification and microRNA, might be an attractive therapeutic avenue for the development of a novel and more effective treatment. This review provides a general overview of the current advances in epigenetics associated with PAH, and discusses the potential for improved treatment through understanding the role of epigenetics in the development of PAH.
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Affiliation(s)
- Jun-Dae Kim
- Department of Internal Medicine, Yale Cardiovascular Research Center, Section of Cardiovascular Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Aram Lee
- Department of Life Systems, Sookmyung Women's University, Seoul, Korea
| | - Jihea Choi
- Department of Life Systems, Sookmyung Women's University, Seoul, Korea
| | - Youngsook Park
- Department of Life Systems, Sookmyung Women's University, Seoul, Korea
| | - Hyesoo Kang
- Department of Life Systems, Sookmyung Women's University, Seoul, Korea
| | - Woochul Chang
- Department of Biology Education, College of Education, Pusan National University, Busan, Korea
| | - Myeong-Sok Lee
- Department of Life Systems, Sookmyung Women's University, Seoul, Korea
| | - Jongmin Kim
- Department of Life Systems, Sookmyung Women's University, Seoul, Korea
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22
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Dasgupta N, Kumar Thakur B, Ta A, Das S. Caveolin-1 is transcribed from a hypermethylated promoter to mediate colonocyte differentiation and apoptosis. Exp Cell Res 2015; 334:323-36. [DOI: 10.1016/j.yexcr.2015.03.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 03/23/2015] [Accepted: 03/24/2015] [Indexed: 11/28/2022]
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23
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Lin C, Li X, Zhang Y, Guo Y, Zhou J, Gao K, Dai J, Hu G, Lv L, Du J, Zhang Y. The microRNA feedback regulation of p63 in cancer progression. Oncotarget 2015; 6:8434-53. [PMID: 25726529 PMCID: PMC4496160 DOI: 10.18632/oncotarget.3020] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 12/31/2014] [Indexed: 12/14/2022] Open
Abstract
The transcription factor p63 is a member of the p53 gene family that plays a complex role in cancer due to its involvement in epithelial differentiation, cell cycle arrest and apoptosis. MicroRNAs are a class of small, non-coding RNAs with an important regulatory role in various cellular processes, as well as in the development and progression of cancer. A number of microRNAs have been shown to function as transcriptional targets of p63. Conversely, microRNAs also can modulate the expression and activity of p63. However, the p63-microRNA regulatory circuit has not been addressed in depth so far. Here, computational genomic analysis was performed using miRtarBase, Targetscan, microRNA.ORG, DIANA-MICROT, RNA22-HSA and miRDB to analyze miRNA binding to the 3'UTR of p63. JASPAR (profile score threshold 80%) and TFSEARCH datasets were used to search transcriptional start sites for p53/p63 response elements. Remarkably, these data revealed 63 microRNAs that targeted p63. Furthermore, there were 39 microRNAs targeting p63 that were predicted to be regulated by p63. These analyses suggest a crosstalk between p63 and microRNAs. Here, we discuss the crosstalk between p63 and the microRNA network, and the role of their interactions in cancer.
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Affiliation(s)
- Changwei Lin
- Department of General Surgery, The Third XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Xiaorong Li
- Department of General Surgery, The Third XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Yi Zhang
- Department of General Surgery, The XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Yihang Guo
- Department of General Surgery, The Third XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Jianyu Zhou
- Department of General Surgery, The Third XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Kai Gao
- Department of General Surgery, The Third XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Jing Dai
- Department of General Surgery, The Third XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Gui Hu
- Department of General Surgery, The Third XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Lv Lv
- Department of General Surgery, The Third XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Juan Du
- Department of General Surgery, The Third XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Yi Zhang
- Department of General Surgery, The Third XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
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24
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Goh JN, Loo SY, Datta A, Siveen KS, Yap WN, Cai W, Shin EM, Wang C, Kim JE, Chan M, Dharmarajan AM, Lee ASG, Lobie PE, Yap CT, Kumar AP. microRNAs in breast cancer: regulatory roles governing the hallmarks of cancer. Biol Rev Camb Philos Soc 2015; 91:409-28. [DOI: 10.1111/brv.12176] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Revised: 12/15/2014] [Accepted: 12/19/2014] [Indexed: 12/13/2022]
Affiliation(s)
- Jen N. Goh
- Cancer Science Institute of Singapore, National University of Singapore; Singapore 117599 Singapore
- Department of Pharmacology; Yong Loo Lin School of Medicine, National University of Singapore; Singapore 117599 Singapore
| | - Ser Y. Loo
- Cancer Science Institute of Singapore, National University of Singapore; Singapore 117599 Singapore
- Department of Physiology; Yong Loo Lin School of Medicine, National University of Singapore; Singapore 117597 Singapore
- Genome Institute of Singapore, Agency for Science, Technology and Research (A*STAR); Singapore 138672 Singapore
| | - Arpita Datta
- Department of Physiology; Yong Loo Lin School of Medicine, National University of Singapore; Singapore 117597 Singapore
| | - Kodappully S. Siveen
- Department of Pharmacology; Yong Loo Lin School of Medicine, National University of Singapore; Singapore 117599 Singapore
| | - Wei N. Yap
- Cancer Science Institute of Singapore, National University of Singapore; Singapore 117599 Singapore
- Department of Pharmacology; Yong Loo Lin School of Medicine, National University of Singapore; Singapore 117599 Singapore
| | - Wanpei Cai
- Cancer Science Institute of Singapore, National University of Singapore; Singapore 117599 Singapore
- Department of Pharmacology; Yong Loo Lin School of Medicine, National University of Singapore; Singapore 117599 Singapore
| | - Eun M. Shin
- Cancer Science Institute of Singapore, National University of Singapore; Singapore 117599 Singapore
| | - Chao Wang
- Cancer Science Institute of Singapore, National University of Singapore; Singapore 117599 Singapore
- Department of Pharmacology; Yong Loo Lin School of Medicine, National University of Singapore; Singapore 117599 Singapore
| | - Ji E. Kim
- Cancer Science Institute of Singapore, National University of Singapore; Singapore 117599 Singapore
| | - Maurice Chan
- Division of Medical Sciences; National Cancer Centre; Singapore 169610 Singapore
| | - Arun M. Dharmarajan
- Curtin Health Innovation Research Institute, Biosciences Research Precinct, School of Biomedical Sciences, Faculty of Health Sciences, Curtin University; 6845 Perth Western Australia Australia
| | - Ann S.-G. Lee
- Department of Physiology; Yong Loo Lin School of Medicine, National University of Singapore; Singapore 117597 Singapore
- Division of Medical Sciences; National Cancer Centre; Singapore 169610 Singapore
- Duke-NUS Graduate Medical School; Singapore 169857 Singapore
| | - Peter E. Lobie
- Cancer Science Institute of Singapore, National University of Singapore; Singapore 117599 Singapore
- Department of Pharmacology; Yong Loo Lin School of Medicine, National University of Singapore; Singapore 117599 Singapore
- National University Cancer Institute; Singapore 1192288 Singapore
| | - Celestial T. Yap
- Department of Physiology; Yong Loo Lin School of Medicine, National University of Singapore; Singapore 117597 Singapore
- National University Cancer Institute; Singapore 1192288 Singapore
| | - Alan P. Kumar
- Cancer Science Institute of Singapore, National University of Singapore; Singapore 117599 Singapore
- Department of Pharmacology; Yong Loo Lin School of Medicine, National University of Singapore; Singapore 117599 Singapore
- Curtin Health Innovation Research Institute, Biosciences Research Precinct, School of Biomedical Sciences, Faculty of Health Sciences, Curtin University; 6845 Perth Western Australia Australia
- National University Cancer Institute; Singapore 1192288 Singapore
- Department of Biological Sciences; University of North Texas; Denton TX 76203-5017 U.S.A
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25
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Smith-Vikos T, de Lencastre A, Inukai S, Shlomchik M, Holtrup B, Slack FJ. MicroRNAs mediate dietary-restriction-induced longevity through PHA-4/FOXA and SKN-1/Nrf transcription factors. Curr Biol 2014; 24:2238-46. [PMID: 25242029 DOI: 10.1016/j.cub.2014.08.013] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Revised: 06/30/2014] [Accepted: 08/07/2014] [Indexed: 01/23/2023]
Abstract
BACKGROUND Dietary restriction (DR) has been shown to prolong longevity across diverse taxa, yet the mechanistic relationship between DR and longevity remains unclear. MicroRNAs (miRNAs) control aging-related functions such as metabolism and lifespan through regulation of genes in insulin signaling, mitochondrial respiration, and protein homeostasis. RESULTS We have conducted a network analysis of aging-associated miRNAs connected to transcription factors PHA-4/FOXA and SKN-1/Nrf, which are both necessary for DR-induced lifespan extension in Caenorhabditis elegans. Our network analysis has revealed extensive regulatory interactions between PHA-4, SKN-1, and miRNAs and points to two aging-associated miRNAs, miR-71 and miR-228, as key nodes of this network. We show that miR-71 and miR-228 are critical for the response to DR in C. elegans. DR induces the expression of miR-71 and miR-228, and the regulation of these miRNAs depends on PHA-4 and SKN-1. In turn, we show that PHA-4 and SKN-1 are negatively regulated by miR-228, whereas miR-71 represses PHA-4. CONCLUSIONS Based on our findings, we have discovered new links in an important pathway connecting DR to aging. By interacting with PHA-4 and SKN-1, miRNAs transduce the effect of dietary-restriction-mediated lifespan extension in C. elegans. Given the conservation of miRNAs, PHA-4, and SKN-1 across phylogeny, these interactions are likely to be conserved in more-complex species.
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Affiliation(s)
- Thalyana Smith-Vikos
- Department of Molecular, Cellular and Developmental Biology, Yale University, P.O. Box 208103, New Haven, CT 06520, USA
| | - Alexandre de Lencastre
- Department of Molecular, Cellular and Developmental Biology, Yale University, P.O. Box 208103, New Haven, CT 06520, USA
| | - Sachi Inukai
- Department of Molecular, Cellular and Developmental Biology, Yale University, P.O. Box 208103, New Haven, CT 06520, USA
| | - Mariel Shlomchik
- Department of Molecular, Cellular and Developmental Biology, Yale University, P.O. Box 208103, New Haven, CT 06520, USA
| | - Brandon Holtrup
- Department of Molecular, Cellular and Developmental Biology, Yale University, P.O. Box 208103, New Haven, CT 06520, USA
| | - Frank J Slack
- Department of Molecular, Cellular and Developmental Biology, Yale University, P.O. Box 208103, New Haven, CT 06520, USA.
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Palmer JD, Soule BP, Simone BA, Zaorsky NG, Jin L, Simone NL. MicroRNA expression altered by diet: can food be medicinal? Ageing Res Rev 2014; 17:16-24. [PMID: 24833329 DOI: 10.1016/j.arr.2014.04.005] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 04/20/2014] [Accepted: 04/29/2014] [Indexed: 01/04/2023]
Abstract
As the link between metabolism and major disease processes becomes more well-defined, the identification of key molecular targets is leading to new therapeutic strategies. As a result, small non-coding RNA molecules that regulate gene expression via epigenetic alterations, microRNAs have been identified as regulators of these metabolic processes. In the last decade, dietary interventions have been used to change metabolism and to potentially alter disease progression and clinical outcomes. These interventions have been linked, at a molecular level, to microRNAs. This review will summarize the role of various dietary strategies on the expression of several microRNA families.
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Pan F, Xu J, Zhang Q, Qiu X, Yu W, Xia J, Chen T, Pan L, Chen Y, Dai Y. Identification and Characterization of the MicroRNA Profile in Aging Rats with Erectile Dysfunction. J Sex Med 2014; 11:1646-56. [DOI: 10.1111/jsm.12500] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Simone BA, Champ CE, Rosenberg AL, Berger AC, Monti DA, Dicker AP, Simone NL. Selectively starving cancer cells through dietary manipulation: methods and clinical implications. Future Oncol 2014; 9:959-76. [PMID: 23837760 DOI: 10.2217/fon.13.31] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
As the link between obesity and metabolic syndrome and cancer becomes clearer, the need to determine the optimal way to incorporate dietary manipulation in the treatment of cancer patients becomes increasingly important. Metabolic-based therapies, such as caloric restriction, intermittent fasting and a ketogenic diet, have the ability to decrease the incidence of spontaneous tumors and slow the growth of primary tumors, and may have an effect on distant metastases in animal models. Despite the abundance of preclinical data demonstrating the benefit of dietary modification for cancer, to date there are few clinical trials targeting diet as an intervention for cancer patients. We hypothesize that this may be due, in part, to the fact that several different types of diet modification exist with no clear recommendations regarding the optimal method. This article will delineate three commonly used methods of dietary manipulation to assess the potential of each as a regimen for cancer therapy.
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Affiliation(s)
- Brittany A Simone
- Department of Radiation Oncology, Kimmel Cancer Center & Jefferson Medical College of Thomas Jefferson University, Philadelphia, PA, USA
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Yang S, Liu X, Li X, Sun S, Sun F, Fan B, Zhao S. MicroRNA-124 reduces caveolar density by targeting caveolin-1 in porcine kidney epithelial PK15 cells. Mol Cell Biochem 2013; 384:213-9. [PMID: 24000013 DOI: 10.1007/s11010-013-1800-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 08/23/2013] [Indexed: 01/29/2023]
Abstract
Caveolin-1 is the principal component of caveolae, and it is implicated in endocytosis, cholesterol homeostasis, signal transduction and tumorigenesis. MicroRNAs play key regulatory roles in many cellular processes. However, the molecular mechanism by which porcine caveolin-1 is regulated by microRNAs remains unclear. In the present study, we found that miR-124 could directly target caveolin-1 in porcine kidney epithelial cells (PK15). A luciferase reporter assay revealed that miR-124 directly bound to Cav1 mRNA. Ectopic expression of miR-124 decreased porcine Cav1 expression at both the mRNA and protein levels. Furthermore, we used transmission electron microscopy to count caveolae in the cytosolic space next to the membrane and we found that the overexpression of miR-124 in PK15 cells reduced the density of the caveolae. Our results suggested that miR-124 reduced caveolar density by targeting caveolin-1 in PK15 cells; therefore, miR-124 could play an important role in the caveolae-mediated endocytosis of pathogens and signal transduction.
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Affiliation(s)
- Songbai Yang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education & College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China,
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Meyer C, Liu Y, Dooley S. Caveolin and TGF-β entanglements. J Cell Physiol 2013; 228:2097-102. [DOI: 10.1002/jcp.24380] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Accepted: 03/26/2013] [Indexed: 01/02/2023]
Affiliation(s)
- Christoph Meyer
- Medical Faculty Mannheim, Section Molecular Hepatology, Department of Medicine II; Heidelberg University; Mannheim Germany
| | - Yan Liu
- Medical Faculty Mannheim, Section Molecular Hepatology, Department of Medicine II; Heidelberg University; Mannheim Germany
- Department of Molecular Cell Biology and Centre for Biomedical Genetics; Leiden University Medical Center; RC Leiden The Netherlands
| | - Steven Dooley
- Medical Faculty Mannheim, Section Molecular Hepatology, Department of Medicine II; Heidelberg University; Mannheim Germany
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He J, Deng Y, Yang G, Xie W. MicroRNA-203 down-regulation is associated with unfavorable prognosis in human glioma. J Surg Oncol 2013; 108:121-5. [PMID: 23813496 DOI: 10.1002/jso.23315] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Accepted: 12/14/2012] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND OBJECTIVES MicroRNA-203 (miR-203) serves as a tumor suppressor or a tumor promoter in different human malignancies. However, its involvement in human gliomas is still unclear. The aim of this study was to investigate the clinical significance of miR-203 expression in gliomas. METHODS Real-time quantitative PCR was employed to measure the expression level of miR-203 in clinical glioma tissues. RESULTS The expression of miR-203 was reduced in high WHO grade glioma tissues compared with that in low WHO grade and normal brain tissues, and decreased with ascending tumor WHO grades (P < 0.001). The reduced miR-203 expression in gliomas was significantly associated with higher WHO grade (P < 0.001), lower KPS score (P = 0.008) and poorer disease-specific survival of patients (P = 0.001). More importantly, subgroup analyses according to tumor WHO grade revealed that the disease-specific survival of patients with low miR-203 expression in high WHO grades (III-IV) subgroup was significantly shorter than those with high miR-203 expression (P < 0.001), but no significant difference was found for patients in WHO grades I-II subgroup (P = 0.08). CONCLUSION Our data validate an important clinical significance of miR-203 in gliomas, and reveal that it might be an intrinsic regulator of tumor progression and a potential prognostic factor for this dismal disease.
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Affiliation(s)
- Jianguo He
- Department of Neurosurgery, Chongqing Red Cross Hospital, Chongqing City, China
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Intestinal Salmonella typhimurium infection leads to miR-29a induced caveolin 2 regulation. PLoS One 2013; 8:e67300. [PMID: 23826261 PMCID: PMC3691122 DOI: 10.1371/journal.pone.0067300] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 05/17/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Salmonella are able to modulate host cell functions facilitating both uptake and resistance to cellular host defence mechanisms. While interactions between bacterial modulators and cellular proteins have been the main focus of Salmonella research, relatively little is known about mammalian gene regulation in response to Salmonella infection. A major class of mammalian gene modulators consists of microRNAs. For our study we examined interactions of microRNAs and regulated mRNAs in mammalian intestinal Salmonella infections using a piglet model. METHODOLOGY/PRINCIPAL FINDINGS After performing microRNA as well as mRNA specific microarray analysis of ileal samples from Salmonella infected as well as control piglets, we integrated expression analysis with target prediction identifying microRNAs that mainly regulate focal adhesion as well as actin cytoskeleton pathways. Particular attention was given to miR-29a, which was involved in most interactions including Caveolin 2. RT-qPCR experiments verified up-regulation of miR-29a after infection while its predicted target Caveolin 2 was significantly down-regulated as examined by transcript and protein detection. Reporter gene assays as well as RNAi experiments confirmed Caveolin 2 to be a miR-29a target. Knock-down of Caveolin 2 in intestinal epithelial cells resulted in retarded proliferation as well as increased bacterial uptake. In addition, our experiments showed that Caveolin 2 regulates the activation of the small Rho GTPase CDC42 but apparently not RAC1 in human intestinal cells. CONCLUSIONS/SIGNIFICANCE Our study outlines for the first time important regulation pathways in intestinal Salmonella infection pointing out that focal adhesion and organisation of actin cytoskeleton are regulated by microRNAs. Functional relevance is shown by miR-29a mediated Caveolin 2 regulation, modulating the activation state of CDC42. Further analysis of examined interactions may support the discovery of novel strategies impairing the uptake of intracellular pathogens.
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Jackson SJ, Zhang Z, Feng D, Flagg M, O'Loughlin E, Wang D, Stokes N, Fuchs E, Yi R. Rapid and widespread suppression of self-renewal by microRNA-203 during epidermal differentiation. Development 2013; 140:1882-91. [PMID: 23571213 DOI: 10.1242/dev.089649] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
MicroRNAs (miRNAs) play important roles in differentiation of stem cells. However, the precise dynamics of miRNA induction during stem cell differentiation have not been visualized and molecular mechanisms through which miRNAs execute their function remain unclear. Using high-resolution in situ hybridization together with cell lineage and proliferation markers in mouse skin, we show that miR-203 is transcriptionally activated in the differentiating daughter cells upon the asymmetric cell division of interfollicular progenitor cells. Once induced, miR-203 rapidly promotes the cell cycle exit within 6 hours and abolishes self-renewal of the progenitor cells. With an inducible mouse model, we identify numerous miR-203 in vivo targets that are highly enriched in regulation of cell cycle and cell division, as well as in response to DNA damage. Importantly, co-suppression of individual targets, including p63, Skp2 and Msi2 by miR-203 is required for its function of promoting the cell cycle exit and inhibiting the long-term proliferation. Together, our findings reveal the rapid and widespread impact of miR-203 on the self-renewal program and provide mechanistic insights into the potent role of miR-203 during the epidermal differentiation. These results should also contribute to understanding the role of miR-203 in the development of skin cancer.
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Affiliation(s)
- Sarah J Jackson
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, CO 80309, USA
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Diet and aging. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2012; 2012:741468. [PMID: 22928085 PMCID: PMC3425961 DOI: 10.1155/2012/741468] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 07/12/2012] [Accepted: 07/16/2012] [Indexed: 11/17/2022]
Abstract
Nutrition has important long-term consequences for health that are not only limited to the individual but can be passed on to the next generation. It can contribute to the development and progression of chronic diseases thus effecting life span. Caloric restriction (CR) can extend the average and maximum life span and delay the onset of age-associated changes in many organisms. CR elicits coordinated and adaptive stress responses at the cellular and whole-organism level by modulating epigenetic mechanisms (e.g., DNA methylation, posttranslational histone modifications), signaling pathways that regulate cell growth and aging (e.g., TOR, AMPK, p53, and FOXO), and cell-to-cell signaling molecules (e.g., adiponectin). The overall effect of these adaptive stress responses is an increased resistance to subsequent stress, thus delaying age-related changes and promoting longevity. In human, CR could delay many diseases associated with aging including cancer, diabetes, atherosclerosis, cardiovascular disease, and neurodegenerative diseases. As an alternative to CR, several CR mimetics have been tested on animals and humans. At present, the most promising alternatives to the use of CR in humans seem to be exercise, alone or in combination with reduced calorie intake, and the use of plant-derived polyphenol resveratrol as a food supplement.
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