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标题：Channeling macrophage polarization by rocaglates increases macrophage resistance to Mycobacterium tuberculosis
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作者：Sujoy Chatterjee ; Shivraj M. Yabaji ; Oleksii S. Rukhlenko 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2021
卷号：24
期号：8
页码：1-24
DOI：10.1016/j.isci.2021.102845
语种：English
出版社：Elsevier
摘要：SummaryMacrophages contribute to host immunity and tissue homeostasis via alternative activation programs. M1-like macrophages control intracellular bacterial pathogens and tumor progression. In contrast, M2-like macrophages shape reparative microenvironments that can be conducive for pathogen survival or tumor growth. An imbalance of these macrophages phenotypes may perpetuate sites of chronic unresolved inflammation, such as infectious granulomas and solid tumors. We have found that plant-derived and synthetic rocaglates sensitize macrophages to low concentrations of the M1-inducing cytokine IFN-gamma and inhibit their responsiveness to IL-4, a prototypical activator of the M2-like phenotype. Treatment of primary macrophages with rocaglates enhanced phagosome-lysosome fusion and control of intracellular mycobacteria. Thus, rocaglates represent a novel class of immunomodulators that can direct macrophage polarization toward the M1-like phenotype in complex microenvironments associated with hypofunction of type 1 and/or hyperactivation of type 2 immunity, e.g., chronic bacterial infections, allergies, and, possibly, certain tumors.Graphical abstractDisplay OmittedHighlights•Rocaglates sensitize MΦ to IFNγ proportional to their translation inhibition activity•Active rocaglates inhibit MΦ response to IL-4 and CSF1•Rocaglates upregulate stress response and host defense pathways•Rocaglates induced autophagy in MΦ and improved control of virulent mycobacteriaImmunology; Microbiology