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Barry C, Rouhana S, Braun JL, Geromella MS, Fajardo VA, Pyle WG. Perimenopause Decreases SERCA2a Activity in the Hearts of a Mouse Model of Ovarian Failure. Biomolecules 2024; 14:675. [PMID: 38927078 PMCID: PMC11201532 DOI: 10.3390/biom14060675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2024] [Revised: 06/06/2024] [Accepted: 06/07/2024] [Indexed: 06/28/2024] Open
Abstract
Risk of cardiovascular disease mortality rises in women after menopause. While increased cardiovascular risk is largely attributed to postmenopausal declines in estrogens, the molecular changes in the heart that contribute to risk are poorly understood. Disruptions in intracellular calcium handling develop in ovariectomized mice and have been implicated in cardiac dysfunction. Using a mouse model of menopause in which ovarian failure occurs over 120 days, we sought to determine if perimenopause impacted calcium removal mechanisms in the heart and identify the molecular mechanisms. Mice were injected with 4-vinylcyclohexene diepoxide (VCD) to induce ovarian failure over 120 days, mimicking perimenopause. Hearts were removed at 60 and 120 days after VCD injections, representing the middle and end of perimenopause. SERCA2a function was significantly diminished at the end of perimenopause. Neither SERCA2a nor phospholamban expression changed at either time point, but phospholamban phosphorylation at S16 and T17 was dynamically altered. Intrinsic SERCA inhibitors sarcolipin and myoregulin increased >4-fold at day 60, as did the native activator DWORF. At the end of perimenopause, sarcolipin and myoregulin returned to baseline levels while DWORF was significantly reduced below controls. Sodium-calcium exchanger expression was significantly increased at the end of perimenopause. These results show that the foundation for increased cardiovascular disease mortality develops in the heart during perimenopause and that regulators of calcium handling exhibit significant fluctuations over time. Understanding the temporal development of cardiovascular risk associated with menopause and the underlying mechanisms is critical to developing interventions that mitigate the rise in cardiovascular mortality that arises after menopause.
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Affiliation(s)
- Ciara Barry
- IMPART Team Canada Investigator Network, Dalhousie Medicine, Saint John, NB E2K 5E2, Canada
| | - Sarah Rouhana
- IMPART Team Canada Investigator Network, Dalhousie Medicine, Saint John, NB E2K 5E2, Canada
| | - Jessica L. Braun
- Centre for Bone and Muscle Health, Brock University, St. Catharines, ON L2S 3A1, Canada (V.A.F.)
- Department of Kinesiology, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Mia S. Geromella
- Centre for Bone and Muscle Health, Brock University, St. Catharines, ON L2S 3A1, Canada (V.A.F.)
- Department of Kinesiology, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Val A. Fajardo
- Centre for Bone and Muscle Health, Brock University, St. Catharines, ON L2S 3A1, Canada (V.A.F.)
- Department of Kinesiology, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - W. Glen Pyle
- IMPART Team Canada Investigator Network, Dalhousie Medicine, Saint John, NB E2K 5E2, Canada
- Women’s Health Research Institute at BC Women’s Hospital + Health Centre, Vancouver, BC V6H 2N9, Canada
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Ray CB, Maher JE, Sharma G, Woodham PC, Devoe LD. Cardio-obstetrics de novo: a state-level, evidence-based approach for addressing maternal mortality and severe maternal morbidity in Georgia. Am J Obstet Gynecol MFM 2024; 6:101334. [PMID: 38492640 DOI: 10.1016/j.ajogmf.2024.101334] [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: 01/02/2024] [Accepted: 02/27/2024] [Indexed: 03/18/2024]
Abstract
Georgia has a higher rate of severe maternal morbidity and mortality when compared with the rest of the United States. Evidence gained from the Georgia Maternal Mortality Review Committee identified areas of focus for high-yield clinical initiatives for improvement in maternal health outcomes. Cardiovascular disease, including cardiomyopathy, coronary conditions, and preeclampsia with or without eclampsia, is the most common cause of pregnancy-related death in non-Hispanic Black women in Georgia. The development of a cardio-obstetrics program is an initiative to advance health equity by decreasing cardiovascular morbidity and mortality. This report describes the following: (1) state-level advocacy for improving maternal health outcomes with funding gained through the legislative process and partnership with a governmental agency; (2) cardio-obstetrics program development based on evidence gained from the maternal mortality review process; and (3) implementation of a cardio-obstetrics service, beginning with a focused approach for capacity building and understanding barriers to care.
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Affiliation(s)
- Chadburn B Ray
- Department of Obstetrics and Gynecology, Medical College of Georgia, Augusta, GA (Drs Ray, Maher, Woodham, and Devoe).
| | - James E Maher
- Department of Obstetrics and Gynecology, Medical College of Georgia, Augusta, GA (Drs Ray, Maher, Woodham, and Devoe)
| | - Gyanendra Sharma
- Department of Cardiology, Medical College of Georgia, Augusta, GA (Dr Sharma)
| | - Padmashree C Woodham
- Department of Obstetrics and Gynecology, Medical College of Georgia, Augusta, GA (Drs Ray, Maher, Woodham, and Devoe)
| | - Lawrence D Devoe
- Department of Obstetrics and Gynecology, Medical College of Georgia, Augusta, GA (Drs Ray, Maher, Woodham, and Devoe)
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Stuenkel CA. Cardiovascular disease in women: take it to heart. Climacteric 2024; 27:2-4. [PMID: 38224066 DOI: 10.1080/13697137.2023.2286140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Affiliation(s)
- Cynthia A Stuenkel
- Department of Medicine, Division of Endocrinology and Metabolism, UC San Diego School of Medicine, La Jolla, CA, USA
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