Eicosapentaenoic acid disrupts the balance between Tregs and IL-17+ T cells through PPARγ nuclear receptor activation and protects cardiac allografts.
Eicosapentaenoic acid (EPA) is one of n-3 polyunsaturated fatty acids that possesses a wide array of anti-inflammatory effects but its effects, on transplantation in general and on Tregs and IL-17(+) T cells in particular, are not well studied. We treated recipient mice of heart transplantation with EPA and examined the effect of EPA on the ratio of Tregs/IL-17(+) T cells in an allogeneic heart transplant model. The hearts from BALB/c (H-2d) mice were transplanted into C57BL/6 (H-2b) mice, and the recipients were administered EPA (500 mg/kg/d, 250 mg/kg/d, or 100 mg/kg/d) from d 1 to 3 post-transplant. The survival of cardiac allografts in mice treated with EPA was significantly protracted. Further examination of donor hearts in EPA-treated group demonstrated that infiltrating Foxp3(+) T cells were increased, IL-17(+) T cells were decreased, and expression of PPARγ was up-regulated. In mixed lymphocytes reaction (MLR), incubation with EPA significantly inhibited the proliferation of IL-17(+) T cells and promoted the proliferation of Tregs, while PPARγ antagonists GW9662 could reverse the results. Our study demonstrated that EPA can effectively protect cardiac allografts and disrupt the balance between Tregs and IL-17(+) T cells in a murine model. This effect is partially mediated by PPARγ nuclear receptor activation.
Ye
Ping
P
Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Li
Jun
J
Wang
Sihua
S
Xie
Aini
A
Sun
Wei
W
Xia
Jiahong
J
D000813:Anilides / Q000494:pharmacology; D000818:Animals; D049109:Cell Proliferation / Q000187:drug effects; D015118:Eicosapentaenoic Acid / Q000494:pharmacology* / Q000627:therapeutic use*; D051858:Forkhead Transcription Factors / Q000378:metabolism; D006084:Graft Rejection / Q000503:physiopathology / Q000517:prevention & control*; D006085:Graft Survival / Q000187:drug effects; D016027:Heart Transplantation / Q000502:physiology*; D020381:Interleukin-17 / Q000378:metabolism*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D023421:Models, Animal; D047495:PPAR gamma / Q000037:antagonists & inhibitors / Q000187:drug effects* / Q000502:physiology; D013601:T-Lymphocytes / Q000187:drug effects / Q000276:immunology / Q000473:pathology*; D050378:T-Lymphocytes, Regulatory / Q000187:drug effects / Q000473:pathology*; D014184:Transplantation, Homologous
C457499:2-chloro-5-nitrobenzanilide; D000813:Anilides; D051858:Forkhead Transcription Factors; C498833:Foxp3 protein, mouse; D020381:Interleukin-17; D047495:PPAR gamma; D015118:Eicosapentaenoic Acid