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Burton JJN, Alonso LC. Overnutrition in the early postnatal period influences lifetime metabolic risk: Evidence for impact on pancreatic β-cell mass and function. J Diabetes Investig 2024; 15:263-274. [PMID: 38193815 PMCID: PMC10906026 DOI: 10.1111/jdi.14136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 12/05/2023] [Indexed: 01/10/2024] Open
Abstract
Overconsumption of energy-rich foods that disrupt caloric balance is a fundamental cause of overweight, obesity and diabetes. Dysglycemia and the resulting cardiovascular disease cause substantial morbidity and mortality worldwide, as well as high societal cost. The prevalence of obesity in childhood and adolescence is increasing, leading to younger diabetes diagnosis, and higher severity of microvascular and macrovascular complications. An important goal is to identify early life conditions that increase future metabolic risk, toward the goal of preventing diabetes and cardiovascular disease. An ample body of evidence implicates prenatal and postnatal childhood growth trajectories in the programming of adult metabolic disease. Human epidemiological data show that accelerated childhood growth increases risk of type 2 diabetes in adulthood. Type 2 diabetes results from the combination of insulin resistance and pancreatic β-cell failure, but specific mechanisms by which accelerated postnatal growth impact one or both of these processes remain uncertain. This review explores the metabolic impact of overnutrition during postnatal life in humans and in rodent models, with specific attention to the connection between accelerated childhood growth and future adiposity, insulin resistance, β-cell mass and β-cell dysfunction. With improved knowledge in this area, we might one day be able to modulate nutrition and growth in the critical postnatal window to maximize lifelong metabolic health.
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Affiliation(s)
- Joshua JN Burton
- Division of Endocrinology, Diabetes and Metabolism and the Joan and Sanford I. Weill Center for Metabolic Health, Weill Cornell MedicineNew York CityNew YorkUSA
| | - Laura C Alonso
- Division of Endocrinology, Diabetes and Metabolism and the Joan and Sanford I. Weill Center for Metabolic Health, Weill Cornell MedicineNew York CityNew YorkUSA
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2
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Ivanova E, Hue-Beauvais C, Chaulot-Talmon A, Castille J, Laubier J, De Casanove C, Aubert-Frambourg A, Germon P, Jammes H, Le Provost F. DNA methylation and gene expression changes in mouse mammary tissue during successive lactations: part I - the impact of inflammation. Epigenetics 2023; 18:2215633. [PMID: 37302099 PMCID: PMC10732689 DOI: 10.1080/15592294.2023.2215633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 05/10/2023] [Accepted: 05/12/2023] [Indexed: 06/13/2023] Open
Abstract
Mastitis is among the main reasons women cease breastfeeding, which leads to them supplementing breast milk with artificial formula. In farm animals, mastitis results in significant economic losses and the premature culling of some animals. Nevertheless, researchers do not know enough about the effect of inflammation on the mammary gland. This article discusses the changes to DNA methylation in mouse mammary tissue caused by lipopolysaccharide-induced inflammation (4 h post-injection of lipopolysaccharide). We analysed the expression of some genes related to mammary gland function, epigenetic regulation, and the immune response. The analysis focused on three comparisons: inflammation during the first lactation, inflammation during second lactation with no history of inflammation, and inflammation during second lactation with previous inflammation. We identified differentially methylated cytosines (DMCs), differentially methylated regions (DMRs), and some differentially expressed genes (DEGs) for each comparison. The three comparisons shared some DEGs; however, few DMCs and only one DMR were shared. These observations suggest that inflammation is one of several factors affecting epigenetic regulation during successive lactations. Furthermore, the comparison between animals in second lactation with and without inflammation, with no inflammation history during first lactation showed a different pattern compared to the other conditions in this experiment. This indicates that inflammation history plays an important role in determining epigenetic changes. The data presented in this study suggest that lactation rank and previous inflammation history are equally important when explaining mammary tissue gene expression and DNA methylation changes.Abbreviations: RRBS, reduced representation bisulfite sequencing; RT-qPCR, real-time quantitative polymerase chain reaction; MEC, mammary epithelial cells; TSS, transcription start site; TTS, transcription termination site; UTR, untranslated region; SINE, short interspersed nuclear element; LINE, long interspersed nuclear element; CGI, CpG island; DEG, differentially expressed gene; DMC, differentially methylated cytosine; DMR, differentially methylated region; GO term, gene ontology term; MF, molecular function; BP, biological process.
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Affiliation(s)
- E. Ivanova
- Université Paris-Saclay, INRAE, AgroParistech, GABI, France
| | | | - A. Chaulot-Talmon
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-En-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - J. Castille
- Université Paris-Saclay, INRAE, AgroParistech, GABI, France
| | - J Laubier
- Université Paris-Saclay, INRAE, AgroParistech, GABI, France
| | - C De Casanove
- Université Paris-Saclay, INRAE, AgroParistech, GABI, France
| | - A. Aubert-Frambourg
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-En-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - P. Germon
- INRAE, Université de Tours, ISP, Nouzilly, France
| | - H. Jammes
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-En-Josas, France
- Ecole Nationale Vétérinaire d’Alfort, BREED, Maisons-Alfort, France
| | - F. Le Provost
- Université Paris-Saclay, INRAE, AgroParistech, GABI, France
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Gieniec KA, Davis FM. Mammary basal cells: Stars of the show. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2021; 1869:119159. [PMID: 34653580 DOI: 10.1016/j.bbamcr.2021.119159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 09/30/2021] [Accepted: 10/02/2021] [Indexed: 10/20/2022]
Abstract
Nearly all mammals rely on lactation to support their young and to ensure the continued survival of their species. Despite its importance, relatively little is known about how milk is produced and how it is ejected from the lumen of mammary alveoli and ducts. This review focuses on the latter. We discuss how a relatively small number of basal cells, wrapping around each alveolar unit, contract to forcibly expel milk from the alveolar lumen. We consider how individual basal cells coordinate their activity, the fate of these cells at the end of lactation and avenues for future deliberation and exploration.
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Affiliation(s)
- Krystyna A Gieniec
- EMBL Australia Node in Single Molecule Science, School of Medical Sciences, University of New South Wales, Sydney, Australia
| | - Felicity M Davis
- EMBL Australia Node in Single Molecule Science, School of Medical Sciences, University of New South Wales, Sydney, Australia; School of Pharmacy, University of Queensland, Brisbane, Australia; Department of Biomedicine, Aarhus University, Aarhus, Denmark; Aarhus Institute of Advanced Studies, Aarhus University, Aarhus, Denmark.
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5
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Stewart TA, Hughes K, Stevenson AJ, Marino N, Ju AL, Morehead M, Davis FM. Mammary mechanobiology - investigating roles for mechanically activated ion channels in lactation and involution. J Cell Sci 2021; 134:jcs248849. [PMID: 33262312 DOI: 10.1242/jcs.248849] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 11/06/2020] [Indexed: 01/14/2023] Open
Abstract
The ability of a mother to produce a nutritionally complete neonatal food source has provided a powerful evolutionary advantage to mammals. Milk production by mammary epithelial cells is adaptive, its release is exquisitely timed, and its own glandular stagnation with the permanent cessation of suckling triggers the cell death and tissue remodeling that enables female mammals to nurse successive progeny. Chemical and mechanical signals both play a role in this process. However, despite this duality of input, much remains unknown about the nature and function of mechanical forces in this organ. Here, we characterize the force landscape in the functionally mature gland and the capacity of luminal and basal cells to experience and exert force. We explore molecular instruments for force-sensing, in particular channel-mediated mechanotransduction, revealing increased expression of Piezo1 in mammary tissue in lactation and confirming functional expression in luminal cells. We also reveal, however, that lactation and involution proceed normally in mice with luminal-specific Piezo1 deletion. These findings support a multifaceted system of chemical and mechanical sensing in the mammary gland, and a protective redundancy that ensures continued lactational competence and offspring survival.
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Affiliation(s)
- Teneale A Stewart
- Mater Research Institute-The University of Queensland, Faculty of Medicine, Woolloongabba, Queensland, 4102, Australia
- Translational Research Institute, Woolloongabba, Queensland, 4102, Australia
| | - Katherine Hughes
- Department of Veterinary Medicine, University of Cambridge, Cambridge, CB3 0ES, UK
| | - Alexander J Stevenson
- Mater Research Institute-The University of Queensland, Faculty of Medicine, Woolloongabba, Queensland, 4102, Australia
- Translational Research Institute, Woolloongabba, Queensland, 4102, Australia
| | - Natascia Marino
- Department of Medicine, Indiana University School of Medicine, Indianapolis, 46202, USA
- Susan G. Komen Tissue Bank at Indiana University Simon Cancer Center, Indianapolis, 46202, USA
| | - Adler L Ju
- Translational Research Institute, Woolloongabba, Queensland, 4102, Australia
| | - Michael Morehead
- Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, 26506, USA
| | - Felicity M Davis
- Mater Research Institute-The University of Queensland, Faculty of Medicine, Woolloongabba, Queensland, 4102, Australia
- Translational Research Institute, Woolloongabba, Queensland, 4102, Australia
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Monkkonen T, Traustadóttir GÁ, Koledova Z. Unraveling the Breast: Advances in Mammary Biology and Cancer Methods. J Mammary Gland Biol Neoplasia 2020; 25:233-236. [PMID: 33479879 PMCID: PMC7819143 DOI: 10.1007/s10911-020-09476-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 12/20/2020] [Indexed: 11/06/2022] Open
Abstract
The field of mammary gland biology and breast cancer research encompasses a wide range of topics and scientific questions, which span domains of molecular, cell and developmental biology, cancer research, and veterinary and human medicine, with interdisciplinary overlaps to non-biological domains. Accordingly, mammary gland and breast cancer researchers employ a wide range of molecular biology methods, in vitro techniques, in vivo approaches as well as in silico analyses. The list of techniques is ever-expanding; together with the refinement of established, staple techniques in the field, new technologies keep emerging thanks to technological advances and scientific creativity. This issue of the Journal of Mammary Gland Biology and Neoplasia represents a compilation of original articles and reviews focused on methods used in mammary gland biology and breast cancer research.
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Affiliation(s)
- Teresa Monkkonen
- Department of Pathology, University of California, San Francisco, USA
| | - Gunnhildur Ásta Traustadóttir
- Stem Cell Research Unit, Department of Anatomy, Faculty of Medicine, School of Health Sciences, Biomedical Center, University of Iceland, Reykjavík, Iceland
| | - Zuzana Koledova
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.
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