Combined hydrogen and oxygen therapy attenuates vascular cognitive impairment in rats via gut microbiota-derived SCFA-GPR41/PI3K/Akt/Nrf2 signaling - Xinle Fu; Mengzhuo Ma; Yujie Zhang; Yanzhuo Gao; Yuan Li; Jing Luan; Yingying Fan; Yifei Wang; Xiaoya Xue; Ling Ma; Yizhuo Liu; Hao Xu (Scientific Reports, 2026)