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Menopause accelerates biological aging.

ABSTRACT: Although epigenetic processes have been linked to aging and disease in other systems, it is not yet known whether they relate to reproductive aging. Recently, we developed a highly accurate epigenetic biomarker of age (known as the "epigenetic clock"), which is based on DNA methylation levels. Here we carry out an epigenetic clock analysis of blood, saliva, and buccal epithelium using data from four large studies: the Women's Health Initiative (n = 1,864); Invecchiare nel Chianti (n = 200); Parkinson's disease, Environment, and Genes (n = 256); and the United Kingdom Medical Research Council National Survey of Health and Development (n = 790). We find that increased epigenetic age acceleration in blood is significantly associated with earlier menopause (P = 0.00091), bilateral oophorectomy (P = 0.0018), and a longer time since menopause (P = 0.017). Conversely, epigenetic age acceleration in buccal epithelium and saliva do not relate to age at menopause; however, a higher epigenetic age in saliva is exhibited in women who undergo bilateral oophorectomy (P = 0.0079), while a lower epigenetic age in buccal epithelium was found for women who underwent menopausal hormone therapy (P = 0.00078). Using genetic data, we find evidence of coheritability between age at menopause and epigenetic age acceleration in blood. Using Mendelian randomization analysis, we find that two SNPs that are highly associated with age at menopause exhibit a significant association with epigenetic age acceleration. Overall, our Mendelian randomization approach and other lines of evidence suggest that menopause accelerates epigenetic aging of blood, but mechanistic studies will be needed to dissect cause-and-effect relationships further.

SUBMITTER: Levine ME

PROVIDER: S-EPMC4995944 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature

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Menopause accelerates biological aging.

Levine Morgan E ME Lu Ake T AT Chen Brian H BH Hernandez Dena G DG Singleton Andrew B AB Ferrucci Luigi L Bandinelli Stefania S Salfati Elias E Manson JoAnn E JE Quach Austin A Kusters Cynthia D J CD Kuh Diana D Wong Andrew A Teschendorff Andrew E AE Widschwendter Martin M Ritz Beate R BR Absher Devin D Assimes Themistocles L TL Horvath Steve S

Proceedings of the National Academy of Sciences of the United States of America 20160725 33

Although epigenetic processes have been linked to aging and disease in other systems, it is not yet known whether they relate to reproductive aging. Recently, we developed a highly accurate epigenetic biomarker of age (known as the "epigenetic clock"), which is based on DNA methylation levels. Here we carry out an epigenetic clock analysis of blood, saliva, and buccal epithelium using data from four large studies: the Women's Health Initiative (n = 1,864); Invecchiare nel Chianti (n = 200); Park ...[more]

PMID: 27457926

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Project description:BackgroundMenopause is a biopsychosocial phenomenon encompassing the transition in a woman's life from being fertile to infertile. Although menopause may result in extremely unpleasant physical symptoms there is evidence of a low rate of reported menopausal symptoms amongst women in Asian cultures. Women's experiences, views, and responses to menopause which influences women's daily life and well-being, may vary between different societies and cultures. This study aimed to explore and describe menopausal experiences among women in Sri Lanka.MethodsA qualitative exploratory research was conducted among postmenopausal women of 46-55 years of age in the western province of Sri Lanka. Individual interviews with a purposive sample of 20 women were conducted, and data analysis was done using manifest and latent content analysis.ResultsThe results consist of an overall theme, "Menopause is a natural stage of aging" and three categories "Entering a new stage", "Managing menopause" and "Not the end of life" which emerged from 34 codes. The overall theme highlights that changes in menopause were experienced as a natural change in life, with health problems that are normal for this change and handled with different self-care practices. The category "Entering a new stage" describes the women becoming aware of menopause and its bodily changes. The category "Managing menopause" describes women's experiences of being able to find their own remedies to ease the menopausal symptoms and by engaging in religious activities and focusing on interaction with people. The category, "Not the end of life" describes women's views of themselves as still valuable because menopause was experienced as a natural part of their lives.ConclusionWomen in Sri Lanka managed menopausal problem mainly on their own as they viewed the menopause as a natural stage of aging risking unnecessary suffering and failure to detect preventable complications. Enabling support groups for menopausal women and improving on their health-seeking behaviour by encouraging them to take part in screening for cervical and breast cancer would improve their condition. Further information on additional hormone therapy with a, subsequent follow-up and evaluation by community health nurses and/or midwives, would facilitate Sri Lankan women's transition to menopause.

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Menopause accelerates biological aging.

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Menopause accelerates biological aging.

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