A strain of Lactobacillus johnsonii and its post-biotics that simultaneously improves vaginal mucosal damage and inhibits vaginal inflammation

CN117821307BActive Publication Date: 2026-06-30JIANGNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGNAN UNIV
Filing Date
2023-12-25
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

There is a lack of effective research in the current technology for improving vaginal mucosal damage and inhibiting vaginal inflammation, and the resources of probiotics for vaginal mucosal repair on the market are limited.

Method used

A strain of Lactobacillus johnsonii, CCFM1340, and its postbiotics were provided. Microbial preparations containing Lactobacillus johnsonii or its fermentation broth, lysis buffer, or lyophilized powder were prepared for use in the preparation of food, pharmaceuticals, or hygiene products. These preparations promoted vaginal epithelial cell migration and repair, reduced the content of soluble cadherin E, increased the expression of tight junction protein OCLN, reduced epithelial cell shedding, and decreased the secretion of myeloperoxidase and IL-1β.

Benefits of technology

It effectively improves vaginal mucosal damage, promotes epithelial cell repair, enhances vaginal mucosal barrier function, and inhibits vaginal inflammation. Specifically, it reduces the content of soluble cadherin E, increases OCLN expression, reduces epithelial cell shedding, reduces the secretion of MPO and IL-1β, and improves vaginal pathological features.

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Abstract

This invention discloses a strain of *Lactobacillus johnsonii* and its metabiotic that simultaneously improves vaginal mucosal damage and inhibits vaginal inflammation, belonging to the field of microbial technology. The *Lactobacillus johnsonii* strain of this invention was isolated from vaginal secretions of healthy women. It has the effects of improving vaginal mucosal damage and inhibiting vaginal inflammation, specifically manifested in: promoting the migration and repair of vaginal epithelial cells; reducing the content of soluble cadherin E in the vaginal mucosa of mice and increasing the expression of vaginal tight junction protein OCLN; reducing the shedding of vaginal mucosal epithelial cells; reducing the secretion of MPO and IL-1β in mice with vaginitis; and (6) improving the pathological characteristics of the vagina in mice. Therefore, this *Lactobacillus johnsonii* has great application potential in products that improve vaginal mucosal damage and inhibit vaginal inflammation.
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