Interleukin-1 receptor-related kinase(IRAK4)is a widely expressed serine/threonine kinase involved in the regulation of innate immunity.IRAK4 plays a pivotal role as a key kinase within the downstream signaling pathwa...Interleukin-1 receptor-related kinase(IRAK4)is a widely expressed serine/threonine kinase involved in the regulation of innate immunity.IRAK4 plays a pivotal role as a key kinase within the downstream signaling pathway cascades of interleukin-1 receptors(IL-1R)and Toll-like receptors(TLRs).The signaling pathways orchestrated by IRAK4 are integral to inflammatory responses,and its overexpression is implicated in the pathogenesis of inflammatory diseases,autoimmune disorders,and cancer.Consequently,targeting IRAK4-mediated signaling pathways has emerged as a promising therapeutic strategy.Small molecule inhibitors and degraders designed to modulate IRAK4 have shown efficacy in mitigating related diseases.In this paper,we will provide a detailed description of the structure and function of IRAK4,the role of IRAK4 in related diseases,as well as the currently reported small molecule inhibitors and degraders of IRAK4.It is expected to provide new directions for enriching the clinical treatment of inflammation and related diseases.展开更多
Interleukin-1 receptor-associated kinase 4(IRAK4)is a pivotal enzyme in the Toll-like receptor(TLR)/MYD88 dependent signaling pathway,which is highly activated in rheumatoid arthritis tissues and activated B cell-like...Interleukin-1 receptor-associated kinase 4(IRAK4)is a pivotal enzyme in the Toll-like receptor(TLR)/MYD88 dependent signaling pathway,which is highly activated in rheumatoid arthritis tissues and activated B cell-like diffuse large B-cell lymphoma(ABC-DLBCL).Inflammatory responses followed by IRAK4 activation promote B-cell proliferation and aggressiveness of lymphoma.Moreover,proviral integration site for Moloney murine leukemia virus 1(PIM1)functions as an anti-apoptotic kinase in propagation of ABC-DLBCL with ibrutinib resistance.We developed a dual IRAK4/PIM1 inhibitor KIC-0101 that potently suppresses the NF-κB pathway and proinflammatory cytokine induction in vitro and in vivo.In rheumatoid arthritis mouse models,treatment with KIC-0101 significantly ameliorated cartilage damage and inflammation.KIC-0101 inhibited the nuclear translocation of NF-κB and activation of JAK/STAT pathway in ABC-DLBCLs.In addition,KIC-0101 exhibited an anti-tumor effect on ibrutinib-resistant cells by synergistic dual suppression of TLR/MYD88-mediated NF-κB pathway and PIM1 kinase.Our results suggest that KIC-0101 is a promising drug candidate for autoimmune diseases and ibrutinib-resistant B-cell lymphomas.展开更多
Flares of joint inflammation and resistance to currently available biologic therapeutics in rheumatoid arthritis(RA)patients could reflect activation of innate immune mechanisms.Herein,we show that a TLR7 GU-rich endo...Flares of joint inflammation and resistance to currently available biologic therapeutics in rheumatoid arthritis(RA)patients could reflect activation of innate immune mechanisms.Herein,we show that a TLR7 GU-rich endogenous ligand,miR-Let7b,potentiates synovitis by amplifying RA monocyte and fibroblast(FLS)trafficking.miR-Let7b ligation to TLR7 in macrophages(MΦs)and FLSs expanded the synovial inflammatory response.Moreover,secretion of M1 monokines triggered by miR-Let7b enhanced Th1/Th17 cell differentiation.We showed that IRAK4 inhibitor(i)therapy attenuated RA disease activity by blocking TLR7-induced M1 MΦor FLS activation,as well as monokine-modulated Th1/Th17 cell polarization.IRAK4i therapy also disrupted RA osteoclastogenesis,which was amplified by miR-Let7b ligation to joint myeloid TLR7.Hence,the effectiveness of IRAK4i was compared with that of a TNF inhibitor(i)or anti-IL-6R treatment in collagen-induced arthritis(CIA)and miR-Let7b-mediated arthritis.We found that TNF or IL-6R blocking therapies mitigated CIA by reducing the infiltration of joint F480+iNOS+MΦs,the expression of certain monokines,and Th1 cell differentiation.Unexpectedly,these biologic therapies were unable to alleviate miR-Let7b-induced arthritis.The superior efficacy of IRAK4i over anti-TNF or anti-IL-6R therapy in miR-Let7b-induced arthritis or CIA was due to the ability of IRAK4i therapy to restrain the migration of joint F480+iNOS+MΦs,vimentin+fibroblasts,and CD3+T cells,in addition to negating the expression of a wide range of monokines,including IL-12,MIP2,and IRF5 and Th1/Th17 lymphokines.In conclusion,IRAK4i therapy may provide a promising strategy for RA therapy by disconnecting critical links between inflammatory joint cells.展开更多
基金supported by the National Natural Science Foundation of China(82293684 and 82293680)the National Key R&D Program of China(2020YFA0908004)CAMS Innovation Fund for Medical Science of China(2022-I2M-1-014).
文摘Interleukin-1 receptor-related kinase(IRAK4)is a widely expressed serine/threonine kinase involved in the regulation of innate immunity.IRAK4 plays a pivotal role as a key kinase within the downstream signaling pathway cascades of interleukin-1 receptors(IL-1R)and Toll-like receptors(TLRs).The signaling pathways orchestrated by IRAK4 are integral to inflammatory responses,and its overexpression is implicated in the pathogenesis of inflammatory diseases,autoimmune disorders,and cancer.Consequently,targeting IRAK4-mediated signaling pathways has emerged as a promising therapeutic strategy.Small molecule inhibitors and degraders designed to modulate IRAK4 have shown efficacy in mitigating related diseases.In this paper,we will provide a detailed description of the structure and function of IRAK4,the role of IRAK4 in related diseases,as well as the currently reported small molecule inhibitors and degraders of IRAK4.It is expected to provide new directions for enriching the clinical treatment of inflammation and related diseases.
基金supported by a grant from the Korea Research Institute of Chemical Technology(KRICT,South Korea,project number SI-2231-40,KK1963-413)3D-TissueChip Based Drug Discovery Platform Technology Development Program(20009774,High-Throughput 3D Multifunctional Tissue-based Screening Service of Efficacy and Safety for Drug Discovery)funded by the Ministry of Trade,Industry and Energy(MOTIE,South Korea).
文摘Interleukin-1 receptor-associated kinase 4(IRAK4)is a pivotal enzyme in the Toll-like receptor(TLR)/MYD88 dependent signaling pathway,which is highly activated in rheumatoid arthritis tissues and activated B cell-like diffuse large B-cell lymphoma(ABC-DLBCL).Inflammatory responses followed by IRAK4 activation promote B-cell proliferation and aggressiveness of lymphoma.Moreover,proviral integration site for Moloney murine leukemia virus 1(PIM1)functions as an anti-apoptotic kinase in propagation of ABC-DLBCL with ibrutinib resistance.We developed a dual IRAK4/PIM1 inhibitor KIC-0101 that potently suppresses the NF-κB pathway and proinflammatory cytokine induction in vitro and in vivo.In rheumatoid arthritis mouse models,treatment with KIC-0101 significantly ameliorated cartilage damage and inflammation.KIC-0101 inhibited the nuclear translocation of NF-κB and activation of JAK/STAT pathway in ABC-DLBCLs.In addition,KIC-0101 exhibited an anti-tumor effect on ibrutinib-resistant cells by synergistic dual suppression of TLR/MYD88-mediated NF-κB pathway and PIM1 kinase.Our results suggest that KIC-0101 is a promising drug candidate for autoimmune diseases and ibrutinib-resistant B-cell lymphomas.
基金This work was supported in part by awards from the Department of Veteran’s Affairs MERIT Award(1I01BX002286)the National Institutes of Health(AR056099 and AR065778)+2 种基金the National Psoriasis Foundation(NPF)the Pfizer Investigator Initiated Research(IIR)Programthe Chicago Biomedical Consortium(CBC)Accelerator Award.
文摘Flares of joint inflammation and resistance to currently available biologic therapeutics in rheumatoid arthritis(RA)patients could reflect activation of innate immune mechanisms.Herein,we show that a TLR7 GU-rich endogenous ligand,miR-Let7b,potentiates synovitis by amplifying RA monocyte and fibroblast(FLS)trafficking.miR-Let7b ligation to TLR7 in macrophages(MΦs)and FLSs expanded the synovial inflammatory response.Moreover,secretion of M1 monokines triggered by miR-Let7b enhanced Th1/Th17 cell differentiation.We showed that IRAK4 inhibitor(i)therapy attenuated RA disease activity by blocking TLR7-induced M1 MΦor FLS activation,as well as monokine-modulated Th1/Th17 cell polarization.IRAK4i therapy also disrupted RA osteoclastogenesis,which was amplified by miR-Let7b ligation to joint myeloid TLR7.Hence,the effectiveness of IRAK4i was compared with that of a TNF inhibitor(i)or anti-IL-6R treatment in collagen-induced arthritis(CIA)and miR-Let7b-mediated arthritis.We found that TNF or IL-6R blocking therapies mitigated CIA by reducing the infiltration of joint F480+iNOS+MΦs,the expression of certain monokines,and Th1 cell differentiation.Unexpectedly,these biologic therapies were unable to alleviate miR-Let7b-induced arthritis.The superior efficacy of IRAK4i over anti-TNF or anti-IL-6R therapy in miR-Let7b-induced arthritis or CIA was due to the ability of IRAK4i therapy to restrain the migration of joint F480+iNOS+MΦs,vimentin+fibroblasts,and CD3+T cells,in addition to negating the expression of a wide range of monokines,including IL-12,MIP2,and IRF5 and Th1/Th17 lymphokines.In conclusion,IRAK4i therapy may provide a promising strategy for RA therapy by disconnecting critical links between inflammatory joint cells.
