TY  - JOUR
A1  - Nadella, Vinod
A1  - Mohanty, Aparna
A1  - Sharma, Lalita
A1  - Yellaboina, Sailu
A1  - Mollenkopf, Hans-Joachim
A1  - Mazumdar, Varadendra Balaji
A1  - Palaparthi, Ramesh
A1  - Mylavarapu, Madhavi B.
A1  - Maurya, Radheshyam
A1  - Kurukuti, Sreenivasulu
A1  - Rudel, Thomas
A1  - Prakash, Hridayesh
T1  - Inhibitors of Apoptosis Protein Antagonists (Smac Mimetic Compounds) Control Polarization of Macrophages during Microbial Challenge and Sterile Inflammatory Responses
JF  - Frontiers in Immunology
N2  - Apoptosis is a physiological cell death process essential for development, tissue homeostasis, and for immune defense of multicellular animals. Inhibitors of apoptosis proteins (IAPs) regulate apoptosis in response to various cellular assaults. Using both genetic and pharmacological approaches we demonstrate here that the IAPs not only support opportunistic survival of intracellular human pathogens like Chlamydia pneumoniae but also control plasticity of iNOS+ M1 macrophage during the course of infection and render them refractory for immune stimulation. Treatment of Th1 primed macrophages with birinapant (IAP-specific antagonist) inhibited NO generation and relevant proteins involved in innate immune signaling. Accordingly, birinapant promoted hypoxia, angiogenesis, and tumor-induced M2 polarization of iNOS+ M1 macrophages. Interestingly, birinapant-driven changes in immune signaling were accompanied with changes in the expression of various proteins involved in the metabolism, and thus revealing the new role of IAPs in immune metabolic reprogramming in committed macrophages. Taken together, our study reveals the significance of IAP targeting approaches (Smac mimetic compounds) for the management of infectious and inflammatory diseases relying on macrophage plasticity.
KW  - apoptosis
KW  - macrophages immunobiology
KW  - inflammation mediators
KW  - polarization
KW  - infection
KW  - hypothalamus
Y1  - 2018
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-197484
SN  - 1664-3224
VL  - 8
IS  - 1792
ER  -