Vitamin D3 improved hypoxia-induced lung injury by inhibiting the complement and coagulation cascade and autophagy pathway.

"Declarations Ethics approval and consent to participateThirty SPF healthy male SD rats were purchased from Chengdu Dossy Experimental Animals Co., Ltd. The feeding environment was 25 ± 1 °C, relative humidity 50%-60%, and light/darkness for 12 h circulation. The rats were allowed free access to food and water. The study was conducted in accordance with the ARRIVE guidelines and approved by the Science and Technology Ethics Committee of Qinghai University. All methods were performed in accordance with the Basel Declaration guidelines and regulations. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding Project 82160322 of the Chinese National Natural Science Foundation; Project 2023-ZJ-746 of the Department of Science and Technology of Qinghai Province."