1. 2, 3, 7, 8-Tetrachlorodibenzo-p-dioxin potential impacts on peripheral blood mononuclear cells of endometriosis women.
- Author
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Tanha, Mahsa, Bozorgmehr, Mahmood, Shokri, Mohammad-Reza, Edalatkhah, Haleh, Tanha, Mahya, Zarnani, Amir-Hassan, and Nikoo, Shohreh
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MONONUCLEAR leukocytes , *ENDOMETRIOSIS , *ARYL hydrocarbon receptors , *REGULATORY T cells , *UTERUS - Abstract
• PBMCs of endometriosis patients express lower levels of AHR and IDO1 genes compared to those of normal individuals. • TCDD increases the expression of AHR, IDO1 and FOXP3 genes in endometriosis compared to non-endometriosis PBMCs. • In response to TCDD treatment, endometriosis PBMCs produce higher levels of kynurenine and IL-6. Endometriosis happens following the implantation of endometrial-derived tissues outside the uterine cavity. It has been suggested that 2, 3, 7, 8-Tetrachlorodibenzo-p-dioxin (TCDD) is involved in endometriosis development. Furthermore, aryl hydrocarbon receptor (AHR), as a TCDD receptor, has been demonstrated to regulate immune responses. Nonetheless, data regarding the mechanisms, through which TCDD influences the immune system in endometriosis, are still inconclusive. Therefore, frequency of regulatory T cells (Tregs) and the expression of FOXP3 , AHR and indoleamine 2, 3-dioxygenase 1 (IDO1) from endometriosis and non-endometriosis individuals were investigated in the absence and presence of TCDD; also, the concentration of IL-6 and kynurenine in the supernatant of cultures was assessed. The impact of TCDD-treated PBMCs on the migration capacity of menstrual blood-derived stromal stem cells (MenSCs) and monocyte chemoattractant protein-1 (MCP-1) and IL-6 production was determined. Here, we found that AHR and IDO1 expression levels were lower in endometriosis PBMCs; however, TCDD treatment increased AHR , FOXP3 , IDO1 , IL-6, and Treg levels in the endometriosis group (P ≤ 0.05−0.0001). TCDD-treated PBMCs increased the migration capacity of MenSCs and up-regulated MCP-1 and IL-6 levels in the PBMCs/MenSCs co-culture (P ≤ 0.01−0.0001). In conclusion, these results shed light on the probable mechanisms, through which AHR activation by chemical toxicants can impact inflammatory immune mediators involved in the development of endometriosis; also, these data support the idea that TCDD could promote endometriosis progression. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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