Departamento de Parasitología Molecular, Instituto Conmemorativo Gorgas de Estudios de la Salud, Ave. Justo Arosemena, Calidonia, 0816-02593 Panama City, Panama.
Departamento de Patología, Laboratorio de Patologia de Moléstias Infecciosas, Faculdade de Medicina, Universidade de São Paulo, Ave. Doutor Arnaldo 455, 01246-903 São Paulo Cerqueira César, Brazil.
Mediators Inflamm. 2020 Oct 27;2020:9278931. doi: 10.1155/2020/9278931. eCollection 2020.
Localized cutaneous leishmaniasis (LCL) caused by () is an endemic disease in Panama. This condition causes ulcerated skin lesions characterized by a mixed Th1/Th2 immune response that is responsible for disease pathology. However, the maintenance of the inflammatory process involves other elements, such as Th17 and inflammasome responses. Although these processes are associated with parasite elimination, their role in the increase in disease pathology cannot be discarded. Thus, the role in infection is still unclear. In this sense, the present study aimed at characterizing the Th17 and inflammasome responses in the skin lesions of patients with LCL caused by () to help elucidate the pathogenesis of this disease in Panama. Th17 and inflammasome responses were evaluated by immunohistochemistry (IHQ) in 46 skin biopsies from patients with LCL caused by () . The Th17 immune response was assessed using CD3, CD4, RoRt, IL-17, IL-6, IL-23, and TGF-1 antibodies, and the inflammasome response was assessed by IL-1, IL-18, and caspase-1 antibodies. The presence of the Th17 and inflammasome responses was evidenced by a positive reaction for all immunological markers in the skin lesions. An inverse correlation between the density of amastigotes and the density of RoRt, IL-17, IL-1 , and caspase-1 cells was observed, but no correlation between Th17 and the inflammasome response with evolutionary disease pathology was reported. These data showed the participation of Th17 cells and the inflammasome in the inflammatory response of the skin lesions of LCL caused by () infection. These results suggest a role in the control of tissue parasitism of IL-17 and the activation of the NLRP3 inflammasome dependent on IL-1 but cannot exclude their role in the development of disease pathology.
地方性皮肤利什曼病(LCL)由()引起,是巴拿马的地方病。这种情况会导致溃疡性皮肤损伤,其特征是混合 Th1/Th2 免疫反应,负责疾病病理学。然而,炎症过程的维持还涉及其他因素,如 Th17 和炎症小体反应。尽管这些过程与寄生虫消除有关,但不能排除它们在增加疾病病理学中的作用。因此,()感染中的作用仍不清楚。在这种意义上,本研究旨在表征由()引起的 LCL 患者皮肤损伤中的 Th17 和炎症小体反应,以帮助阐明巴拿马该疾病的发病机制。通过免疫组织化学(IHQ)评估了 46 例由()引起的 LCL 患者皮肤活检中的 Th17 和炎症小体反应。使用 CD3、CD4、RoRt、IL-17、IL-6、IL-23 和 TGF-β1 抗体评估 Th17 免疫反应,并用 IL-1、IL-18 和 caspase-1 抗体评估炎症小体反应。在皮肤损伤中,所有免疫标志物的阳性反应均证明了 Th17 和炎症小体反应的存在。在阿米巴原虫密度和 RoRt、IL-17、IL-1 和 caspase-1 细胞密度之间观察到负相关,但未报告 Th17 和炎症小体反应与疾病进展病理学之间的相关性。这些数据表明 Th17 细胞和炎症小体参与了由()感染引起的 LCL 皮肤损伤的炎症反应。这些结果表明,IL-17 和依赖于 IL-1 的 NLRP3 炎症小体的激活在控制组织寄生虫中起作用,但不能排除它们在疾病病理学发展中的作用。
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