4.7 Article

Administration of soluble gp130Fc disrupts M-1 macrophage polarization, dendritic cell activation, MDSC expansion and Th-17 induction during experimental cerebral malaria

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INTERNATIONAL IMMUNOPHARMACOLOGY
卷 123, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.intimp.2023.110671

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trans IL-6 signalling; sgp130Fc; malaria; M2 macrophage; Th-17; Treg ratio; MDSC

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The regulatory effect of IL-6 on immune cells is crucial during experimental cerebral malaria pathogenesis. IL-6 neutralization can restore the balance between different immune cell populations and their functions. Blockade of trans IL-6 signaling has been found to affect the expansion of MDSCs and the expression of inflammatory markers, indicating its role in regulating various immune cells during ECM.
Regulatory effect of IL-6 on various immune cells plays a crucial role during experimental cerebral malaria pathogenesis. IL-6 neutralization can restore distorted ratios of myeloid dendritic cells and plasmacytoid dendritic cells as well as the balance between Th-17 and T-regulatory cells. IL-6 can also influence immune cells through classical and trans IL-6 signalling pathways. As trans IL-6 signalling is reportedly involved during malaria pathogenesis, we focused on studying the effects of trans IL-6 signalling blockade on various immune cell populations and how they regulate ECM progression. Results show that administration of sgp130Fc recombinant chimera protein lowers the parasitemia, increases the survivability of Plasmodium berghei ANKA infected mice, and restores the distorted ratios of M1/M2 macrophage, mDC/pDC, and Th-17/Treg. IL-6 trans signalling blockade has been found to affect both expansion of myeloid derived suppressor cells (MDSCs) and expression of inflammatory markers on them during Plasmodium berghei ANKA infection indicating that trans IL-6 signalling might regulate various immune cells and their function during ECM. In this work for the first time, we delineate the effect of sgp130Fc administration on influencing the immunological changes within the host secondary lymphoid organ during ECM induced by Plasmodium berghei ANKA infection.

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