Vitamin B complex blocks the dust fall PM_2.5‐induced acute lung injury through DNA methylation in rats

Abstract

This study aimed to explore whether vitamin B complex (folic acid, B 6 , and B 12 ) could avert DNA methylation changes associated with inflammation induced by acute PM 2.5 exposure. Sprague-Dawley rats were administered by gavage with different concentrations of vitamin B complex once a day for 28 days, and then by intratracheal instillation with saline or PM 2.5 once every 2 days for three times. Vitamin B continued to be taken during the PM 2.5 exposure. Rats were sacrificed 24 h after the last exposure. The results showed that vitamin B complex could block the pathological changes and injury in lungs induced by PM 2.5 . Meanwhile, vitamin B complex could prevent the abnormal DNA methylation of IL-4 and IFN-γ to antagonize the imbalance of IL-4/IFN-γ associated with inflammation. It was further found that vitamin B complex could regulate DNA methyltransferases (DNMTs) and increase the Sadenosylmethionine (SAM)/S-Adenosyl-L-homocysteine (SAH) ratio to reverse the hypomethylation of genomic DNA and the abnormal DNA methylation of IL-4 and IFN-γ. In conclusion, vitamin B complex has a protective effect on acute lung injury by attenuating abnormal DNA methylation induced by PM 2.5 in rats. This study may provide a new insight into the physiological function of vitamin B to prevent the health effects induced by PM 2.5 .

Quantification of the Relationship of Pyridoxine and Spirometry Measurements in the United States Population

“…Bai et al. [ 31 ] performed a study with different concentrations of B vitamins including vitamin B6 and found that the B vitamins could block lung injury from exposure to toxins and even regulate expression on the level of transcription to protect against insults to the lung [ 31 , 32 ]. In 1984, Moriguchi et al.…”