Radiotherapy-induced lacrimal gland injury often causes dry eye. Oxidative stress and local inflammation are the primary consequences of radiotherapy-induced injury. The most recent research shows that the human-specific gene CHRFAM7A plays an important role in inflammation. However, the effect of CHRFAM7A on radiotherapy-induced lacrimal gland injury remains unclear. In this study, humanized mice were successfully generated via the transplantation of human peripheral blood mononuclear cells that expressed human-specific genes. After radiation, the CHRFAM7A gene was highly expressed in the lacrimal glands of humanized mice, in which it protected the function of the lacrimal gland after radiotherapy. CHRFAM7A down-regulated radiotherapy-induced inflammation by suppressing p38/JNK signalling. CHRFAM7A also inhibited oxidative stress in the haematopoietic system after radiotherapy. Further signalling pathway analyses indicated that CHRFAM7A suppressed Akt (protein kinase B, PKB) phosphorylation. CHRFAM7A may therefore be a therapeutic target in radiation-induced lacrimal gland injury.IJCEP Copyright © 2017.
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