Cardiometabolic Diseases and Female Sexual Dysfunction: Animal Studies

Obesity and sexual health: focus on postmenopausal women

Menopause is a cardiometabolic transition with many women experiencing weight gain and redistribution of body fat. Hormonal changes may affect also several dimensions of well-being, including sexual function, with a high rate of female sexual dysfunction (FSD), which displays a multifactorial etiology. The most important biological factors range from chronic low-grade inflammation, associated with hypertrophic adipocytes that may translate into endothelial dysfunction and compromised blood flow through the genitourinary system, to insulin resistance and other neuroendocrine mechanisms targeting the sexual response. Psychosocial factors include poor body image, mood disorders, low self-esteem and life satisfaction, as well as partner's health and quality of relationship, and social stigma. Even unhealthy lifestyle, chronic conditions and putative weight-promoting medications may play a role. The aim of the present narrative review is to update and summarize the state of the art on the link between obesity and FSD in postmenopausal women, pointing to the paucity of high-quality studies and the need for further research with validated end points to assess both biomarkers of obesity and FSD. In addition, we provide general information on the diagnosis and treatment of FSD at menopause with a focus on dietary interventions, physical activity, anti-obesity drugs and bariatric surgery.

Sexual function scores are associated with arterial stiffness in postmenopausal women

BACKGROUND

Female sexual dysfunction (FSD) has been suggested to be correlated with the burden of cardiovascular risk factors.

AIM

We aimed to evaluate the possible association between functional indices of vascular function and FSD scores in apparently healthy postmenopausal women.

METHODS

This cross-sectional study included 116 postmenopausal women who underwent assessment of endothelial function with measurement of flow-mediated dilation (FMD) of the branchial artery and arterial stiffness estimation with measurement of the carotid-femoral pulse wave velocity (PWV). We used the Greene Climacteric Scale to evaluate vasomotor symptomatology, the Female Sexual Function Index (FSFI) to evaluate FSD and the Beck Depression Inventory to evaluate mood disorder. Low sexual function was defined as an FSFI score <26.55.

OUTCOMES

These included FSFI and low sexual function scores as well as measures of PWV and FMD.

RESULTS

Sexual function scores were associated with measures of blood pressure (normal vs low sexual function; systolic blood pressure: 120.2 ± 15.0 mm Hg vs 113.4 ± 14.6 mm Hg; analysis of covariance P = .026; diastolic blood pressure: 75.9 ± 10.5 mm Hg vs 70.3 ± 9.9 mm Hg; analysis of covariance P = .012; both adjusted for age, body mass index, current smoking, and PWV). Systolic blood pressure, but not diastolic blood pressure, was associated with FSFI (B = 0.249, P = .041) and PWV (B = 0.392, P < .001). PWV measures were associated with FSFI (B = -0.291, P = .047) and pulse pressure (B = 0.355, P = .017). FMD measures were also associated with FSFI (B = 0.427, P = .033). All models were adjusted for age, body mass index, current smoking, insulin resistance, vasomotor symptomatology, and Beck Depression Inventory.

CLINICAL IMPLICATIONS

Our findings demonstrate that lower scores of sexual function are associated with deteriorated vascular function mainly manifested as arterial stiffening, further contributing to systolic blood pressure changes.

STRENGTHS AND LIMITATIONS

The strength of this study is the carefully selected healthy sample of postmenopausal women, with simultaneous assessment of climacteric symptomatology and mood disorders. The limitations include the small sample size, the cross-sectional design, and the recruitment of consecutive outpatients of a university menopause clinic.

CONCLUSION

Longitudinal studies and interventions to improve FSD should further assess the clinical relevance of these findings.

Sexual function in Chinese women with different clinical phenotypes of polycystic ovary syndrome

Objective: To investigate sexual function stratified according to four clinical phenotypes of polycystic ovary syndrome (PCOS) and its association with clinical and quality of life parameters, and to compare these with healthy controls in Chinese women with PCOS. Methods: A cross-sectional study was designed in 1000 PCOS women and 500 control women aged 18-45 years. PCOS women were grouped into four clinical phenotypes according to the Rotterdam Criteria. FSFI (Female Sexual Function Index), SF-12 (the 12-item short form health survey) and clinical and hormonal characteristics likely to affect sexual function were determined. Results: 809 PCOS women and 385 control women with complete parameters were evaluated after screening. Phenotype A had a lower total FSFI mean score (23.14 ± 3.22) compared with phenotype D and control group (p < 0.05). The control group had the highest total FSFI mean score (24.98 ± 3.78). For the percentage at risk of sexual dysfunction, phenotype A (87.5%) and phenotype B (82.46%) had a higher risk of female sexual dysfunction (FSD) than that in phenotype C (75.34%), phenotype D (70.56%) and control group (61.30%) (p < 0.05). SF-12 mental domain scores were significantly lower in phenotypes A and B compared with phenotypes C and control group (p < 0.05). Infertility treatment, bioavailable testosterone, psychological factors, age and waist circumference presented negative correlation with female sexual function. Conclusions: The risk of FSD in PCOS women seemed to be associated with PCOS clinical phenotypes. The classical PCOS phenotype with oligo-ovulation and hyperandrogenism had a higher risk of sexual dysfunction.

Yao-Shan of traditional Chinese medicine: an old story for metabolic health

Type 2 diabetes mellitus, nonalcoholic fatty liver disease (NAFLD), cardio-cerebrovascular diseases (CCVDs), hyperuricemia and gout, and metabolic-related sexual dysfunction are metabolic diseases that affect human health in modern society. Scientists have made great efforts to investigate metabolic diseases using cell models in vitro or animal models in the past. However, the findings from cells or animals are difficult to translate into clinical applications due to factors such as the in vitro and in vivo differences; the differences in anatomy, physiology, and genetics between humans and animals; and the differences in microbiome-host interaction. The Chinese have extensively used the medicated diet of traditional Chinese medicine (TCM) (also named as Yao-Shan of TCM, Chinese Yao-Shan et al.) to maintain or improve cardiometabolic health for more than 2,200 years. These ancient classic diets of TCM are essential summaries of long-term life and clinical practices. Over the past 5 years, our group has made every effort to collect and sort out the classic Yao-Shan of TCM from the ancient TCM literature since Spring and Autumn and Warring States Period, especially these are involved in the prevention and treatment of metabolic diseases, such as diabetes, NAFLD, CCVDs, hyperuricemia and gout, and sexual dysfunction. Here, we summarized and discussed the classic Yao-Shan of TCM for metabolic diseases according to the time recorded in the ancient literature, and revised the Latin names of the raw materials in these Yao-Shan of TCM. Moreover, the modern medicine evidences of some Yao-Shan of TCM on metabolic diseases have also been summarized and emphasized in here. However, the exact composition (in terms of ratios), preparation process, and dosage of many Yao-Shan are not standardized, and their main active ingredients are vague. Uncovering the mystery of Yao-Shan of TCM through modern biological and chemical strategies will help us open a door, which is ancient but now looks new, to modulate metabolic homeostasis and diseases.