Department of Immunotherapy and Leishmania Vaccine Research, Pasteur Institute of Iran, Tehran, Iran.
Department of Microbiology and Immunology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Sci Rep. 2020 Oct 1;10(1):16198. doi: 10.1038/s41598-020-72671-7.
Anthroponotic cutaneous leishmaniasis (CL) caused by Leishmania tropica (L. tropica) represents a public health challenge in several resource poor settings. We herein employed a systems analysis approach to study molecular signatures of CL caused by L. tropica in the skin lesions of ulcerative CL (UCL) and non-ulcerative CL (NUCL) patients. Results from RNA-seq analysis determined shared and unique functional transcriptional pathways in the lesions of the UCL and NUCL patients. Several transcriptional pathways involved in inflammatory response were positively enriched in the CL lesions. A multiplexed inflammatory protein analysis showed differential profiles of inflammatory cytokines and chemokines in the UCL and NUCL lesions. Transcriptional pathways for Fcγ receptor dependent phagocytosis were among shared enriched pathways. Using L. tropica specific antibody (Ab)-mediated phagocytosis assays, we could substantiate Ab-dependent cellular phagocytosis (ADCP) and Ab-dependent neutrophil phagocytosis (ADNP) activities in the lesions of the UCL and NUCL patients, which correlated with L. tropica specific IgG Abs. Interestingly, a negative correlation was observed between parasite load and L. tropica specific IgG/ADCP/ADNP in the skin lesions of CL patients. These results enhance our understanding of human skin response to CL caused by L. tropica.
由热带利什曼原虫(L. tropica)引起的人际传播皮肤利什曼病(CL)在资源匮乏的地区对公共卫生构成了挑战。在此,我们采用系统分析方法研究了溃疡性 CL(UCL)和非溃疡性 CL(NUCL)患者皮肤损伤中由 L. tropica 引起的 CL 的分子特征。RNA-seq 分析的结果确定了 UCL 和 NUCL 患者病变中共享和独特的功能转录途径。几个参与炎症反应的转录途径在 CL 病变中呈正富集。多重炎症蛋白分析显示 UCL 和 NUCL 病变中炎症细胞因子和趋化因子的差异谱。Fcγ 受体依赖性吞噬作用的转录途径是共享的富集途径之一。使用利什曼原虫特异性抗体(Ab)介导的吞噬作用测定,我们可以证实 UCL 和 NUCL 患者病变中 Ab 依赖性细胞吞噬作用(ADCP)和 Ab 依赖性中性粒细胞吞噬作用(ADNP)的活性,这与利什曼原虫特异性 IgG Abs 相关。有趣的是,在 CL 患者的皮肤病变中,寄生虫负荷与利什曼原虫特异性 IgG/ADCP/ADNP 之间存在负相关。这些结果增强了我们对人类皮肤对由 L. tropica 引起的 CL 的反应的理解。