Local treatment with a polycarbophil-based cream in postmenopausal women with genitourinary syndrome of menopause

Introduction and hypothesis

Genitourinary syndrome of menopause (GSM) is a common problem associated with lower urinary tract and gynecological symptoms due to the decrease in estrogen production in postmenopausal women. Topical estrogen therapy is shown to improve these symptoms; nonetheless, there are limited data on the efficacy of nonhormonal moisturizers in these patients.

Methods

A prospective cohort study was conducted to compare the symptoms of GSM before and after treatment with a polycarbophil-based cream in 42 women. The quality of life (QoL) and sexual scores were obtained from the Thai version of the International Consultation on Incontinence Modular Questionnaire-Lower Urinary Tract Symptoms (ICIQ-LUTS) along with uroflow measurements before and 4 and 12 weeks after treatment.

Results

Significant improvements in ICIQ-LUTSqol scores were observed after 4 weeks (9.38 ± 7.47 vs 6.76 ± 5.77; p = 0.017) and 12 weeks (10.03 ± 7.49 vs 5.97 ± 4.02; p = 0.002) when compared with the baseline values before treatment. The ICIQ-LUTS sexual scores were also improved after treatment at 4 weeks (2.29 ± 2.26 vs 0.88 ± 1.34; p < 0.001) and 12 weeks (2.13 ± 2.22 vs 0.42 ± 0.81; p < 0.001) compared with the baseline scores. No differences in ICIQ-LUTSqol and sexual scores were observed between the 4- and 12-week treatment groups.

Conclusion

The polycarbophil-based cream improved the overall LUTS and sexual symptoms in the patients with GSM, thus indicating that the nonhormonal polycarbophil-based cream may prove effective for the treatment for women with this condition.

Hyperosmolal vaginal lubricants markedly reduce epithelial barrier properties in a three-dimensional vaginal epithelium model

Most of the widely used vaginal lubricants in the U.S. and Europe are strongly hyperosmolal, formulated with high concentrations of glycerol, propylene glycol, polyquaternary compounds or other ingredients that make these lubricants 4 to 30 times the osmolality of healthy vaginal fluid. Hyperosmolal formulations have been shown to cause marked toxicity to human colorectal epithelia in vivo, and significantly increase vaginal transmission of genital herpes infections in the mouse/HSV model. They also cause toxicity to explants of vaginal epithelia, to cultured vaginal epithelial cells, and increase susceptibility to HIV in target cells in cell cultures. Here, we report that the osmolality of healthy vaginal fluid is 370 ± 40 mOsm/Kg in women with Nugent scores 0–3, and that a well-characterized three-dimensional human vaginal epithelium tissue model demonstrated that vaginal lubricants with osmolality greater than 4 times that of vaginal fluid (>1500 mOsm/Kg) markedly reduce epithelial barrier properties and showed damage in tissue structure. Four out of four such lubricants caused disruption in the parabasal and basal layers of cells as observed by histological analysis and reduced barrier integrity as measured by trans-epithelial electrical resistance (TEER). No epithelial damage to these layers was observed for hypo- and iso-osmolal lubricants with osmolality of <400 mOsm/Kg. The results confirm extensive reports of safety concerns of hyperosmolal lubricants and suggest the usefulness of reconstructed in vitro vaginal tissue models for assessing safety of lubricants in the absence of direct clinical tests in humans.