N-Acetylcysteine enhances low-dose estrogen efficacy against ischemia-reperfusion injury in estrogen-deprived obese insulin-resistant rats.

IF 2.8 3区医学 Q1 OBSTETRICS & GYNECOLOGY

Menopause: The Journal of The North American Menopause Society Pub Date : 2025-01-01 Epub Date: 2024-12-03 DOI:10.1097/GME.0000000000002452

Sivaporn Sivasinprasasn, Kenneth Chattipakorn, Wasana Pratchayasakul, Siriporn C Chattipakorn, Nipon Chattipakorn

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引用次数: 0

Abstract

Objectives: Postmenopausal women are at higher risk of metabolic syndrome and cardiovascular disease, which are aggravated by obesity. Although estrogen provides cardiometabolic protection, chronic high-dose treatment could be harmful. This study investigated the efficacy of combined N-acetylcysteine (NAC) and low-dose estrogen treatment against cardiometabolic dysfunction in female estrogen-deprived obese rats with cardiac ischemia-reperfusion (I/R) injury.

Methods: Bilateral ovariectomized (O) female Wistar rats were fed a high-fat diet (H) for 12 weeks. Then, rats were treated for 4 weeks with one of the following: vehicle (OH; sesame oil), regular-dose estrogen (E; 50 μg/kg/d), low-dose estrogen (e; 25 μg/kg/d), NAC (N; 100 mg/kg/d), or combined low-dose estradiol with NAC (eN). All rats then underwent cardiac I/R injury, and the left ventricle (LV) function and mitochondrial function were investigated (n = 6/group). Statistical analysis was performed by one-way ANOVA followed by Fisher's least significant difference post hoc test.

Results: Body weight, visceral fat, plasma glucose, and plasma cholesterol were significantly increased with impaired LV function and heart rate variability in OH rats. OH-E rats had decreased plasma insulin and Homeostatic Model Assessment for Insulin Resistance index. Both OH-E and OH-eN rats had similarly improved heart rate variability and LV function. During cardiac I/R, OH-E and OH-eN rats had preserved left ventricular ejection fraction, stroke volume, and attenuated arrhythmias. Impaired cardiac mitochondrial function and infarct size were similarly reduced in OH-E and OH-eN rats.

Conclusions: Combined NAC and low-dose estrogen treatment shares similar efficacy as regular-dose estrogen in attenuating cardiac dysfunction, cardiac mitochondrial dysfunction, and protecting the heart against I/R injury in estrogen-deprived obese insulin-resistant rats.

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来源期刊

Menopause: The Journal of The North American Menopause Society 医学-妇产科学

CiteScore

5.40

自引率

7.40%

发文量

330

审稿时长

3-8 weeks

期刊介绍： Menopause, published monthly, provides a forum for new research, applied basic science, and clinical guidelines on all aspects of menopause. The scope and usefulness of the journal extend beyond gynecology, encompassing many varied biomedical areas, including internal medicine, family practice, medical subspecialties such as cardiology and geriatrics, epidemiology, pathology, sociology, psychology, anthropology, and pharmacology. This forum is essential to help integrate these areas, highlight needs for future research, and enhance health care.