期刊
TOXICOLOGY AND APPLIED PHARMACOLOGY
卷 428, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.taap.2021.115682
关键词
Benzene; Glycine; GNMT; sarcosine axis; Hematotoxicity
资金
- National Natural Science Foundation of China [81773397, 82073520]
- Scientific Research Key Program of Beijing Municipal Commission of Education [KZ201810025032]
- Beijing Natural Science Foundation Program
The study aimed to explore the effects of benzene on metabolism, especially in amino acid metabolism, in human peripheral blood B lymphocyte cells treated with 1,4-benzoquinone (1,4-BQ) and in benzene-exposed population based on the untargeted and targeted metabolomics platforms. Results showed that 1,4-BQ disturbed metabolic activity, upregulated the ratio of sarcosine/glycine, and implied the involvement of the glycine/GNMT/sarcosine axis in benzene-induced hematotoxicity.
Benzene, an important and widely used industrial chemical, is the cause of different types of blood disorders. However, the mechanisms of benzene-induced hematotoxicity are still unclear. This study aimed to explore the effects of benzene on metabolism, especially in amino acid metabolism, in human peripheral blood B lymphocyte cells (AHH-1 cells) treated with 1,4-benzoquinone (1,4-BQ) and in benzene-exposed population based on the untargeted and targeted metabolomics platforms. The results showed that 1,4-BQ disturbed the metabolic activity, such as arginine biosynthesis, citrate cycle, glycine, serine, and threonine metabolism pathways, and significantly upregulated the ratio of sarcosine/glycine in vitro. Meanwhile, the targeted metabolomics further showed that the ratio of sarcosine/glycine was also increased in the benzene exposure population. Notably, the expression of glycine N-methyltransferase (GNMT), an enzyme catalyzing the transformation of glycine to sarcosine, was upregulated both in 1,4-BQ treated AHH-1 cells and benzene-exposed workers. These results imply that the glycine/GNMT/sarcosine axis was involved in benzene-induced hematotoxicity. Such evidence will help to develop a better understanding of the underlying mechanism of benzene-induced hematotoxicity at the level of amino acid metabolism.
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