Interleukin 10 Production Correlates with Pathology in Human Leishmania Donovani Infections
Overview
Affiliations
We have found that an important Th2 cytokine, IL-10, is produced by tissues from patients acutely infected with Leishmania donovani. In all individuals tested, IL-10 mRNA production was increased in lymph nodes taken during acute disease over that observed in postacute samples. In contrast, both pre- and posttreatment lymph nodes had readily detected mRNA for IFN-gamma and IL-2. A down-regulating effect of IL-10 on leishmania-induced proliferative responses was demonstrated when Hu rIL-10 was added to cultures of PBMC from clinically cured individuals. PBMC from individuals with acute visceral leishmaniasis responded to stimulation with leishmania lysate by producing IL-10 mRNA. Simultaneously cultured PBMC collected from the same patients after successful chemotherapy produced no detectable IL-10 mRNA after leishmania antigen stimulation. Neutralizing anti-IL-10 mAb added to PBMC from patients with acute visceral leishmaniasis markedly increased the proliferative response to leishmania lysate. Finally, we observed mRNA for IL-10 and IFN-gamma concurrently in a lesion from a patient with post-kala-azar dermal leishmaniasis (PKDL). These results indicate the production of IL-10 during L. donovani infection, and suggest a role for this cytokine in the regulation of immune responsiveness during visceral leishmaniasis.
Malnutrition disrupts adaptive immunity during visceral leishmaniasis by enhancing IL-10 production.
Amorim Sacramento L, Gonzalez-Lombana C, Scott P PLoS Pathog. 2024; 20(11):e1012716.
PMID: 39527629 PMC: 11581394. DOI: 10.1371/journal.ppat.1012716.
Deletion of MIF gene from live attenuated LdCen parasites enhances protective CD4 T cell immunity.
Fiuza J, Gannavaram S, Gaze S, de Ornellas L, Alves E, Ismail N Sci Rep. 2023; 13(1):7362.
PMID: 37147351 PMC: 10163264. DOI: 10.1038/s41598-023-34333-2.
Pradhan S, Snehlata , Manna D, Karmakar S, Singh M, Bhattacharya A Heliyon. 2022; 8(7):e09868.
PMID: 35847617 PMC: 9284459. DOI: 10.1016/j.heliyon.2022.e09868.
T Lymphocyte Exhaustion During Human and Experimental Visceral Leishmaniasis.
Costa-Madeira J, Trindade G, Almeida P, Silva J, Carregaro V Front Immunol. 2022; 13:835711.
PMID: 35585983 PMC: 9108272. DOI: 10.3389/fimmu.2022.835711.
Thakur L, Madaan P, Jain A, Shankar V, Negi A, Bhushan Chauhan S Front Immunol. 2022; 12:765684.
PMID: 35087516 PMC: 8787830. DOI: 10.3389/fimmu.2021.765684.