Pitta Maira G R, Romano Audrey, Cabantous Sandrine, Henri Sandrine, Hammad Awad, Kouriba Bouréma, Argiro Laurent, el Kheir Musa, Bucheton Bruno, Mary Charles, El-Safi Sayda Hassan, Dessein Alain
INSERM, Unité 906, Marseille, France.
J Clin Invest. 2009 Aug;119(8):2379-87. doi: 10.1172/JCI38813. Epub 2009 Jul 13.
IL-17 and IL-22 have been shown to increase protection against certain bacteria and fungal pathogens in experimental models. However, no human studies have demonstrated a crucial role of IL-17 and IL-22 in protection against infections. We show here that Leishmania donovani, which can cause the lethal visceral disease Kala Azar (KA), stimulates the differentiation of Th17 cells, which produce IL-17, IL-22, and IFN-gamma. Analysis of Th1, Th2, and Th17 cytokine responses by cultured PBMCs from individuals in a cohort of subjects who developed KA or were protected against KA during a severe outbreak showed that IL-17 and IL-22 were strongly and independently associated with protection against KA. Our results suggest that, along with Th1 cytokines, IL-17 and IL-22 play complementary roles in human protection against KA, and that a defect in Th17 induction may increase the risk of KA.
在实验模型中,白细胞介素-17(IL-17)和白细胞介素-22(IL-22)已被证明能增强对某些细菌和真菌病原体的抵抗力。然而,尚无人体研究表明IL-17和IL-22在抗感染中起关键作用。我们在此表明,可导致致命性内脏疾病黑热病(KA)的杜氏利什曼原虫能刺激产生IL-17、IL-22和干扰素-γ的辅助性T细胞17(Th17细胞)分化。对在一次严重疫情中患KA或对KA有抵抗力的一组受试者的外周血单核细胞(PBMC)进行培养,分析其Th1、Th2和Th17细胞因子反应,结果显示IL-17和IL-22与对KA的抵抗力密切且独立相关。我们的研究结果表明,与Th1细胞因子一起,IL-17和IL-22在人体对KA的抵抗力中起互补作用,并且Th17诱导缺陷可能会增加患KA的风险。