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Kolb AF, Mayer C, Zitskaja A, Petrie L, Hasaballah K, Warren C, Carlisle A, Lillico S, Whitelaw B. Maternal α-casein deficiency extends the lifespan of offspring and programmes their body composition. GeroScience 2024:10.1007/s11357-024-01273-2. [PMID: 38992336 DOI: 10.1007/s11357-024-01273-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Accepted: 06/27/2024] [Indexed: 07/13/2024] Open
Abstract
Early nutrition has significant effects on physiological outcomes during adult life. We have analysed the effect of maternal α-casein (CSN1S1) deficiency on the physiological fate of dams and their offspring. α-casein deficiency reduces maternal milk protein concentration by more than 50% and attenuates the growth of pups to 27% (p < 0.001) of controls at the point of weaning. This is associated with a permanent reduction in adult body weight (- 31% at 25 weeks). Offspring nursed by α-casein deficient dams showed a significantly increased lifespan (+ 20%, χ2: 10.6; p = 0.001). Liver transcriptome analysis of offspring nursed by α-casein deficient dams at weaning revealed gene expression patterns similar to those found in dwarf mice (reduced expression of somatotropic axis signalling genes, increased expression of xenobiotic metabolism genes). In adult mice, the expression of somatotropic axis genes returned to control levels. This demonstrates that, in contrast to dwarf mice, attenuation of the GH-IGF signalling axis in offspring nursed by α-casein deficient dams is transient, while the changes in body size and lifespan are permanent. Offspring nursed by α-casein deficient dams showed permanent changes in body composition. Absolute and relative adipose tissue weights (p < 0.05), the percentage of body fat (p < 0.001) as well as adipocyte size in epididymal white adipose tissue are all reduced. Serum leptin levels were 25% of those found in control mice (p < 0.001). Liver lipid content and lipid composition were significantly altered in response to postnatal nutrition. This demonstrates the nutrition in early life programmes adult lipid metabolism, body composition and lifespan.
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Affiliation(s)
- Andreas F Kolb
- Nutrition, Obesity and Disease Research Theme, Rowett Institute, University of Aberdeen, Aberdeen, AB25 2ZD, Scotland.
| | - Claus Mayer
- Biomathematics and Statistics Scotland (BioSS), University of Aberdeen, Aberdeen, AB25 2ZD, Scotland
| | - Alina Zitskaja
- Nutrition, Obesity and Disease Research Theme, Rowett Institute, University of Aberdeen, Aberdeen, AB25 2ZD, Scotland
| | - Linda Petrie
- Nutrition, Obesity and Disease Research Theme, Rowett Institute, University of Aberdeen, Aberdeen, AB25 2ZD, Scotland
| | - Khulod Hasaballah
- Nutrition, Obesity and Disease Research Theme, Rowett Institute, University of Aberdeen, Aberdeen, AB25 2ZD, Scotland
| | - Claire Warren
- Roslin Institute, University of Edinburgh, Edinburgh, Scotland
| | - Ailsa Carlisle
- Roslin Institute, University of Edinburgh, Edinburgh, Scotland
| | - Simon Lillico
- Roslin Institute, University of Edinburgh, Edinburgh, Scotland
| | - Bruce Whitelaw
- Roslin Institute, University of Edinburgh, Edinburgh, Scotland
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2
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Swer PB, Kharbuli B, Syiem D, Sharma R. Age-related decline in the expression of BRG1, ATM and ATR are partially reversed by dietary restriction in the livers of female mice. Biogerontology 2024:10.1007/s10522-024-10117-7. [PMID: 38970714 DOI: 10.1007/s10522-024-10117-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Accepted: 06/26/2024] [Indexed: 07/08/2024]
Abstract
BRG1 (Brahma-related gene 1) is a member of the SWI/SNF (switch/sucrose nonfermentable) chromatin remodeling complex which utilizes the energy from ATP hydrolysis for its activity. In addition to its role of regulating the expression of a vast array of genes, BRG1 mediates DNA repair upon genotoxic stress and regulates senescence. During organismal ageing, there is accumulation of unrepaired/unrepairable DNA damage due to progressive breakdown of the DNA repair machinery. The present study investigates the expression level of BRG1 as a function of age in the liver of 5- and 21-month-old female mice. It also explores the impact of dietary restriction on BRG1 expression in the old (21-month) mice. Salient findings of the study are: Real-time PCR and Western blot analyses reveal that BRG1 levels are higher in 5-month-old mice but decrease significantly with age. Dietary restriction increases BRG1 expression in the 21-month-old mice, nearly restoring it to the level observed in the younger group. Similar expression patterns are observed for DNA damage response genes ATM (Ataxia Telangiectasia Mutated) and ATR (Ataxia Telangiectasia and Rad3-related) with the advancement in age and which appears to be modulated by dietary restriction. BRG1 transcriptionally regulates ATM as a function of age and dietary restriction. These results suggest that BRG1, ATM and ATR are downregulated as mice age, and dietary restriction can restore their expression. This implies that dietary restriction may play a crucial role in regulating BRG1 and related gene expression, potentially maintaining liver repair and metabolic processes as mice age.
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Affiliation(s)
- Pynskhem Bok Swer
- Department of Biochemistry, North-Eastern Hill University, Shillong, 793022, India
| | | | - Donkupar Syiem
- Department of Biochemistry, North-Eastern Hill University, Shillong, 793022, India
| | - Ramesh Sharma
- Department of Biochemistry, North-Eastern Hill University, Shillong, 793022, India.
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3
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Marín-Tello C, Jintaridth P, Sanchez F, González C, Zelada-Castillo L, Vásquez-Arqueros A, Guevara-Vásquez A, Vieira A. Epigenetic regulation by metabolites from the gut microbiome. Benef Microbes 2022; 13:437-444. [PMID: 36377583 DOI: 10.3920/bm2022.0006] [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] [Indexed: 11/16/2022]
Abstract
The gut microbiome can metabolise food components, such as dietary fibres and various phytochemicals; and the microbiome can also synthesise some nutrients, for example B vitamins. The metabolites produced by bacteria and other micro-organisms in the colon can have implications for health and disease risk. Some of these metabolites are epigenetically active, and can contribute to changes in the chemical modification and structure of chromatin by affecting the activity and expression of epigenetically-active enzymes, for example histone deacetylases and DNA methyltransferases. The epigenetic activity of such gut microbiome metabolites is reviewed herein.
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Affiliation(s)
- C Marín-Tello
- Food, Metabolism, and Physiology Laboratory, Facultad de Farmacia y Bioquímica, Universidad Nacional de Trujillo, Trujillo 13008, Perú
| | - P Jintaridth
- Department of Tropical Nutrition and Food Science, The Faculty of Tropical Medicine, Mahidol University, 420/6 Rachavithi Road, Rachathevi, Payatai, Bangkok 10400, Thailand
| | - F Sanchez
- Instituto De Educacion Superior Tecnológico Público, 103, Lonya Grande 01556, Perú
| | - C González
- CITE Agroindustrial Chavimochic, Virú 044, Perú
| | - L Zelada-Castillo
- Food, Metabolism, and Physiology Laboratory, Facultad de Farmacia y Bioquímica, Universidad Nacional de Trujillo, Trujillo 13008, Perú
| | - A Vásquez-Arqueros
- Food, Metabolism, and Physiology Laboratory, Facultad de Farmacia y Bioquímica, Universidad Nacional de Trujillo, Trujillo 13008, Perú
| | - A Guevara-Vásquez
- Food, Metabolism, and Physiology Laboratory, Facultad de Farmacia y Bioquímica, Universidad Nacional de Trujillo, Trujillo 13008, Perú
| | - A Vieira
- Nutrition and Metabolism Research Laboratory, BPK-9625, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6, Canada
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4
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Saintilnord WN, Tenlep SYN, Preston JD, Duregon E, DeRouchey JE, Unrine JM, de Cabo R, Pearson KJ, Fondufe-Mittendorf YN. Chronic Exposure to Cadmium Induces Differential Methylation in Mice Spermatozoa. Toxicol Sci 2021; 180:262-276. [PMID: 33483743 PMCID: PMC8041459 DOI: 10.1093/toxsci/kfab002] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Cadmium exposure is ubiquitous and has been linked to diseases including cancers and reproductive defects. Since cadmium is nonmutagenic, it is thought to exert its gene dysregulatory effects through epigenetic reprogramming. Several studies have implicated germline exposure to cadmium in developmental reprogramming. However, most of these studies have focused on maternal exposure, while the impact on sperm fertility and disease susceptibility has received less attention. In this study, we used reduced representation bisulfite sequencing to comprehensively investigate the impact of chronic cadmium exposure on mouse spermatozoa DNA methylation. Adult male C57BL/J6 mice were provided water with or without cadmium chloride for 9 weeks. Sperm, testes, liver, and kidney tissues were collected at the end of the treatment period. Cadmium exposure was confirmed through gene expression analysis of metallothionein-1 and 2, 2 well-known cadmium-induced genes. Analysis of sperm DNA methylation changes revealed 1788 differentially methylated sites present at regulatory regions in sperm of mice exposed to cadmium compared with vehicle (control) mice. Furthermore, most of these differential methylation changes positively correlated with changes in gene expression at both the transcription initiation stage as well as the splicing levels. Interestingly, the genes targeted by cadmium exposure are involved in several critical developmental processes. Our results present a comprehensive analysis of the sperm methylome in response to chronic cadmium exposure. These data, therefore, highlight a foundational framework to study gene expression patterns that may affect fertility in the exposed individual as well as their offspring, through paternal inheritance.
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Affiliation(s)
- Wesley N Saintilnord
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, Kentucky 40536-0509, USA
| | - Sara Y N Tenlep
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky 40536-0509, USA
| | - Joshua D Preston
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky 40536-0509, USA,Emory University School of Medicine, Atlanta, Georgia 30322, USA
| | - Eleonora Duregon
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 20892, USA
| | - Jason E DeRouchey
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40536-0509, USA
| | - Jason M Unrine
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, Kentucky 40536-0509, USA
| | - Rafael de Cabo
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 20892, USA
| | - Kevin J Pearson
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky 40536-0509, USA,To whom correspondence should be addressed at Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY 40536-0509, USA. E-mail: ; Department of Molecular and Cellular Biochemistry, University of Kentucky, 800 Rose Street, 273 BBSRB, Lexington, KY 40536-0509, USA. E-mail:
| | - Yvonne N Fondufe-Mittendorf
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, Kentucky 40536-0509, USA,To whom correspondence should be addressed at Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY 40536-0509, USA. E-mail: ; Department of Molecular and Cellular Biochemistry, University of Kentucky, 800 Rose Street, 273 BBSRB, Lexington, KY 40536-0509, USA. E-mail:
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5
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Saeidi M, Vieira A. Dietary Factors and the Epigenetics of Fatty Liver Disease. SYSTEMS MEDICINE 2021. [DOI: 10.1016/b978-0-12-801238-3.11645-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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6
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Klutstein M. Cause and effect in epigenetics - where lies the truth, and how can experiments reveal it?: Epigenetic self-reinforcing loops obscure causation in cancer and aging. Bioessays 2020; 43:e2000262. [PMID: 33236359 DOI: 10.1002/bies.202000262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/14/2020] [Accepted: 10/15/2020] [Indexed: 12/19/2022]
Abstract
Epigenetic changes are implicated in aging and cancer. Sometimes, it is clear whether the causing agent of the condition is a genetic factor or epigenetic. In other cases, the causative factor is unclear, and could be either genetic or epigenetic. Is there a general role for epigenetic changes in cancer and aging? Here, I present the paradigm of causative roles executed by epigenetic changes. I discuss cases with clear roles of the epigenome in cancer and aging, and other cases showing involvement of other factors. I also present the possibility that sometimes causality is difficult to assign because of the presence of self-reinforcing loops in epigenetic regulation. Such loops hinder the identification of the causative factor. I provide an experimental framework by which the role of the epigenome can be examined in a better setting and where the presence of such loops could be investigated in more detail.
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Affiliation(s)
- Michael Klutstein
- Institute of Dental Sciences, Faculty of Dental Medicine, The Hebrew University of Jerusalem, Ein Kerem, Jerusalem, Israel
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Lu J, Temp U, Müller-Hartmann A, Esser J, Grönke S, Partridge L. Sestrin is a key regulator of stem cell function and lifespan in response to dietary amino acids. ACTA ACUST UNITED AC 2020; 1:60-72. [PMID: 37117991 DOI: 10.1038/s43587-020-00001-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 09/17/2020] [Indexed: 01/10/2023]
Abstract
Dietary restriction (DR) promotes healthy aging in diverse species. Essential amino acids play a key role, but the molecular mechanisms are unknown. The evolutionarily conserved Sestrin protein, an inhibitor of activity of the target of rapamycin complex 1 (TORC1), has recently been discovered as a sensor of amino acids in vitro. Here, we show that Sestrin null mutant flies have a blunted response of lifespan to DR. A mutant Sestrin fly line, with blocked amino acid binding and TORC1 activation, showed delayed development, reduced fecundity, extended lifespan and protection against lifespan-shortening, high-protein diets. Sestrin mediated reduced intestinal stem cell activity and gut cell turnover from DR, and stem cell proliferation in response to dietary amino acids, by regulating the TOR pathway and autophagy. Sestrin expression in intestinal stem cells was sufficient to maintain gut homeostasis and extend lifespan. Sestrin is thus a molecular link between dietary amino acids, stem cell function and longevity.
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Hunt NJ, Kang SWS, Lockwood GP, Le Couteur DG, Cogger VC. Hallmarks of Aging in the Liver. Comput Struct Biotechnol J 2019; 17:1151-1161. [PMID: 31462971 PMCID: PMC6709368 DOI: 10.1016/j.csbj.2019.07.021] [Citation(s) in RCA: 158] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/30/2019] [Accepted: 07/31/2019] [Indexed: 02/07/2023] Open
Abstract
While the liver demonstrates remarkable resilience during aging, there is growing evidence that it undergoes all the cellular hallmarks of aging, which increases the risk of liver and systemic disease. The aging process in the liver is driven by alterations of the genome and epigenome that contribute to dysregulation of mitochondrial function and nutrient sensing pathways, leading to cellular senescence and low-grade inflammation. These changes promote multiple phenotypic changes in all liver cells (hepatocytes, liver sinusoidal endothelial, hepatic stellate and Küpffer cells) and impairment of hepatic function. In particular, age-related changes in the liver sinusoidal endothelial cells are a significant but under-recognized risk factor for the development of age-related cardiometabolic disease. Liver aging is driven by transcription and metabolic epigenome alterations. This leads to cellular senescence and low-grade inflammation. Hepatocyte, sinusoidal endothelial, stellate and Küpffer cells undergoes the hallmarks of aging. Each cell type demonstrates phenotypical cellular changes with age.
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Key Words
- AMPK, 5′ adenosine monophosphate-activated protein kinase
- CR, caloric restriction
- Endothelial
- FOXO, forkhead box O
- Genetic
- HSC, hepatic stellate cell
- Hepatocyte
- IGF-1, insulin like growth factor 1
- IL-6, interleukin 6
- IL-8, interleukin 8
- KC, Küpffer cell
- LSEC, liver sinusoidal endothelial cell
- Mitochondrial dysfunction
- NAD, nicotinamide adenine dinucleotide
- NAFLD, non-alcoholic fatty liver disease
- NO, nitric oxide
- Nutrient sensing pathways
- PDGF, platelet derived growth factor
- PGC-1α, peroxisome proliferator-activated receptor gamma coactivator 1-α
- ROS, reactive oxygen species
- SIRT1, sirtuin 1
- Senescence
- TNFα, tumor necrosis factor alpha
- VEGF, vascular endothelial growth factor
- mTOR, mammalian target of rapamycin
- miR, microRNA
- αSMA, alpha smooth muscle actin
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Affiliation(s)
- Nicholas J Hunt
- ANZAC Research Institute, Aging and Alzheimer's Institute, Centre for Education and Research on Ageing, Concord Repatriation General Hospital, Concord, NSW, Australia.,The University of Sydney, Concord Clinical School, Sydney Medical School, Sydney, NSW, Australia.,The University of Sydney, Nutrition Ecology, Charles Perkins Centre, Sydney, NSW, Australia
| | - Sun Woo Sophie Kang
- ANZAC Research Institute, Aging and Alzheimer's Institute, Centre for Education and Research on Ageing, Concord Repatriation General Hospital, Concord, NSW, Australia.,The University of Sydney, Nutrition Ecology, Charles Perkins Centre, Sydney, NSW, Australia
| | - Glen P Lockwood
- ANZAC Research Institute, Aging and Alzheimer's Institute, Centre for Education and Research on Ageing, Concord Repatriation General Hospital, Concord, NSW, Australia.,The University of Sydney, Nutrition Ecology, Charles Perkins Centre, Sydney, NSW, Australia
| | - David G Le Couteur
- ANZAC Research Institute, Aging and Alzheimer's Institute, Centre for Education and Research on Ageing, Concord Repatriation General Hospital, Concord, NSW, Australia.,The University of Sydney, Concord Clinical School, Sydney Medical School, Sydney, NSW, Australia.,The University of Sydney, Nutrition Ecology, Charles Perkins Centre, Sydney, NSW, Australia
| | - Victoria C Cogger
- ANZAC Research Institute, Aging and Alzheimer's Institute, Centre for Education and Research on Ageing, Concord Repatriation General Hospital, Concord, NSW, Australia.,The University of Sydney, Concord Clinical School, Sydney Medical School, Sydney, NSW, Australia.,The University of Sydney, Nutrition Ecology, Charles Perkins Centre, Sydney, NSW, Australia
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