Yongsheng Hao, Yukang Li, Shen Li, Juanli Huo, Ninghang You, Lei Li, Yue Jiang, Weidong Zhang, Huakai Wei, Qingyuan Sun, Yunwei Pang, Xunsi Qin, Tao Tu, Huoqing Huang, Jian Tian, Pengfei Zhang, Yaru Wang, Xinxin Xu, Bin Yao, Wei Shen, Xing Qin, Huiying Luo, Yong Zhao
Limosilactobacillus reuteri Y15 (LRY15)-derived polyunsaturated fatty acids (PUFAs) restore follicular cell-cell junctions and fertility. LRY15, isolated from the intestine of alginate oligosaccharides (AOS)-dosed mice, improves ovarian function and fertility in cisplatin-induced subfertile mice. LRY15 produces PUFAs, whereas deletion of holo-acyl carrier protein synthase (AcpS) in LRY15 reduces PUFA synthesis and weakens its protective effects. Docosahexaenoic acid (DHA) supplementation recapitulates LRY15-mediated improvements in follicle and embryo development. Stereo-seq analysis reveals that LRY15 restores ovarian cell-cell junctions, suggesting junction remodeling as an important cellular process associated with LRY15 treatment. The Fads2-deficient mouse model further validates that LRY15-derived PUFAs restore follicular junction integrity and improve fertility.