Targeting IRAK1-S100A9 Axis Overcomes the Resistance to Paclitaxel in Nasopharyngeal Carcinoma
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PROVIDER: PRJNA641562 | ENA |
REPOSITORIES: ENA
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Project description:Resistance to chemotherapy is one of the main causes of mortality in late-stage nasopharyngeal carcinoma (NPC) with dismal prognosis and limited therapeutic options. Therefore, there is an urgent need to exploit new therapeutic targets to improve current clinical outcome. In this study, we identified pacritinib, a late stage clinical drug targeting IRAK1, as a sensitizer to resistance of paclitaxel in NPC. Through analysis of both chemoresistant cellular models and clinical samples of relapse and metastasis, we have shown that aberrant IRAK1-S100A9 deregulation is correlated with chemoresistance and prognosticates poor clinical outcome. Further functional studies demonstrated that genetic and pharmacological inhibition of IRAK1-S100A9 axis overcomes the resistance to paclitaxel and combination of pacritinib with paclitaxel exhibited superior anti-tumor effect in both in vivo and in vitro models.
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Project description:Nasopharyngeal carcinoma (NPC) is a unique head and neck cancer with highly aggressive and metastatic potential, and distant metastasis is the main reason for treatment failure. The underlying molecular mechanisms of NPC metastasis remains poorly understood. Here, we have identified S100 calcium binding protein A14 (S100A14) as a functional regulator suppressed NPC metastasis via inhibiting NF-kB signaling and reversing epithelial-mesenchymal transition (EMT). S100A14 was downregulated in highly metastatic NPC cells and NPC tissues. Analyzing 202 NPC samples by immunohistochemical staining revealed that lower S100A14 expression significantly correlated with shorter patient overall survival (OS) and distant metastasis-free survival (DMFS), serving as an independent unfavorable prognostic factor. Gain- and loss-of-function studies confirmed that S100A14 suppressed NPC cellular motility in vitro and in vivo. Mechanically, S100A14 promoted ubiquitin-proteasome-mediated degradation of interleukin-1 receptor-associated kinase 1 (IRAK1) to suppress NPC cellular migration. Moreover, S100A14 and IRAK1 established a feedback loop, which can be disrupted by the IRAK1 inhibitor T2457. Overall, our study uncovers the S100A14-IRAK1 feedback loop is a theranostic target for NPC metastasis.
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Project description:Myelodysplastic Syndromes (MDS) result from expansion of defective hematopoietic stem/progenitor clones. There is an urgent need to develop targeted therapies capable of eliminating the defective MDS clones. We identified that IRAK1, an immune modulating kinase, is overexpressed and hyperactivated in MDS. MDS-propagating clones treated with a small-molecule IRAK1 inhibitor (IRAK1/4-Inh) exhibited impaired expansion and increased apoptosis, which coincided with TRAF6/NF-M-NM-:B inhibition. Suppression of IRAK1, either by RNAi or with IRAK1/4-Inh, is selectively detrimental to MDS clones as normal CD34+ cells are preserved. Based on conclusions derived from an integrative gene expression analysis, we combined IRAK1 and BCL2 inhibitors and found that co-treatment collaboratively and selectively eliminated MDS clones. In summary, these findings implicate IRAK1 as a drugable target in MDS. MDSL cells were transduced with lentivirus encoding shRNA targeting human IRAK1 and a negative control (pLKO) for 2.5 days. GFP positive cells were sorted for RNA extraction, labeling, and hybridization. A total of four samples were included, and two groups are assigned. Two replicates are for each group. Comparison comprises mRNA expression profile of TRAF6 knockdown (shT6) v.s. control vector (pLKO). Additionally, MDSL cells were treated with either DMSO or IRAK inhibitor for 24hrs. Cells were subjected to RNA extraction, labeling, and hybridization. A total of four samples were included, and two groups are assigned.
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Project description:Myelodysplastic Syndromes (MDS) result from expansion of defective hematopoietic stem/progenitor clones. There is an urgent need to develop targeted therapies capable of eliminating the defective MDS clones. We identified that IRAK1, an immune modulating kinase, is overexpressed and hyperactivated in MDS. MDS-propagating clones treated with a small-molecule IRAK1 inhibitor (IRAK1/4-Inh) exhibited impaired expansion and increased apoptosis, which coincided with TRAF6/NF-κB inhibition. Suppression of IRAK1, either by RNAi or with IRAK1/4-Inh, is selectively detrimental to MDS clones as normal CD34+ cells are preserved. Based on conclusions derived from an integrative gene expression analysis, we combined IRAK1 and BCL2 inhibitors and found that co-treatment collaboratively and selectively eliminated MDS clones. In summary, these findings implicate IRAK1 as a drugable target in MDS.
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Project description:Interleukin-1 receptor associated kinase 1 (IRAK1) is an important component of the IL-1R and TLR signaling pathways, which influence Th cell differentiation. Here, we show that IRAK1 promotes Th17 development by mediating IL-1β induced upregulation of IL-23R and subsequent STAT3 phosphorylation, thus enabling sustained IL-17 production. Moreover, we show that IRAK1 signaling fosters Th1 differentiation by mediating T-bet induction and counteracts Treg generation. Cotransfer experiments revealed that Irak1-deficient CD4+ T cells have a cell-intrinsic defect in generating Th1 and Th17 cells under inflammatory conditions in spleen, mesenteric lymph nodes and colon tissue. Furthermore, IRAK1 expression in T cells was shown to be essential for T cell accumulation in the inflamed intestine and mLNs. Transcriptome analysis ex vivo revealed that IRAK1 promotes T cell activation and induction of gut-homing molecules in a cell-intrinsic manner. Accordingly, Irak1-deficient T cells failed to upregulate surface expression of α4β7 integrin after transfer into Rag1-/- mice and their ability to induce colitis was greatly impaired. Lack of IRAK1 in recipient mice provided additional protection from colitis. Therefore, IRAK1 plays an important role in intestinal inflammation by mediating T cell activation, differentiation and their accumulation in the gut. Thus, IRAK1 is a promising novel target for therapy of inflammatory bowel diseases.
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Project description:S100A14 Suppresses Metastasis of Nasopharyngeal Carcinoma by Inhibition of NF-kB Signaling through Degradation of IRAK1
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Project description:Glioma is the most common and aggressive primary malignant brain tumor. N6-methyladenosine (m6A) modification widely exists in eukaryotic cells and plays an important role in the occurrence and development of human tumors. Here, we show that the m6A reader HNRNPC was overexpression and related to poor prognosis in glioma patients. HNRNPC plays crucial role in glioma cell proliferation, invasion and tumorigenesis. HNRNPC augments m6A-dependent mRNA stability of IRAK1, which impacted poor survival for glioma patients, further activated the downstream MAPK pathway. HNRNPC promotes glioma cells progression largely through the upregulation of IRAK1. Together, our findings demonstrate the novel HNRNPC-IRAK1-MAPK axis critical for glioma tumorigenesis and extend the reason for the upregulation of IRAK1.
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