AUTHOR=Li Pan , Wu Xiaoyan , Huang Yanlan , Qin Ruijing , Xiong Pan , Qiu Yangyang 

TITLE=L-serine metabolic regulation and host respiratory homeostasis

JOURNAL=Frontiers in Cellular and Infection Microbiology

VOLUME=Volume 15 - 2025

YEAR=2025

URL=https://www.frontiersin.org/journals/cellular-and-infection-microbiology/articles/10.3389/fcimb.2025.1518659

DOI=10.3389/fcimb.2025.1518659

ISSN=2235-2988

ABSTRACT=L-Serine, a non-essential amino acid (NEAA), can be obtained through diet or in situ synthesis. Functionally, L-serine not only serves as the precursor of other amino acids, lipids, and nucleotides, but also participates in the folate/methionine cycle. An increasing number of studies have demonstrated that L-serine is widely used in the adjuvant therapy of many diseases (e.g., inflammation, infections, fibrosis, and tumors). Here, we summarize the synthesis and metabolism of serine followed by its functions in health and disease. Moreover, we delineate the potential mechanisms whereby L-serine is involved in the occurrence and progression of respiratory diseases. This review aims to summarize the research progress of serine in diseases, propose the problems that need to be solved in the future, and provide guidance for subsequent research and development.