NHWD-870

NHWD-870 exhibits anti-tumor activity both in vitro and in vivo against SCLC, primarily by regulating the BRD4/STRADA/CCND1 axis and inhibiting the transition of the cell cycle from the G1 phase to the S phase. These findings highlight the therapeutic potential of NHWD-870 as a novel BET inhibitor for SCLC treatment and provide a molecular basis for further clinical development.

In our study, osimertinib-resistant HCC827/OR and PC-9/OR cells were established from parental osimertinib-sensitive cells, and osimertinib (AZD9291) and NHWD870, a bromodomain and extra-terminal (BET) inhibitor, were used to treat cells and mice. Inhibition of BRD4 sensitized non-small-cell lung cancer (NSCLC) cells to osimertinib by blocking YAP1-mediated APT1 transcription and disrupting APT1-mediated depalmitoyation of MST1 and YAP1 nuclear translocation, which restores osimertinib sensitivity through the APT1-MST1-YAP1 axis in NSCLC. Our study provides a novel mechanism of osimertinib resistance and suggests potential therapeutic strategies for NSCLC.

CLEC4E+ TAMs promote an immunosuppressive microenvironment by enhancing their own proliferation and impairing anti-tumour functions, thereby limiting T-cell cytotoxicity. Targeting the BRD4/CEBPβ/CLEC4E axis with BET inhibitors represents a promising therapeutic strategy for reprogramming TAMs and enhancing anti-tumour immunity.

This suggests that NHWD-870 exerts its effects through both direct tumor suppression and modulation of the immune microenvironment. This case highlights the exceptional efficacy of BET inhibitors in the treatment of NUT carcinoma, as evidenced by the first report of complete response achieved with BET inhibitor monotherapy, and supports their potential as a personalized therapeutic strategy.

Importantly, BRD4 inhibitor NHWD870 significantly reversed this resistance by inhibiting the nuclear translocation of EGFR and subsequent transcriptional activation of CMPK2. In conclusion, BRD4 inhibitor inhibited APT1-mediated depalmitoylation modification of EGFR, resulting in reduction of nuclear EGFR and subsequent downregulation of CMPK2, enhancing Osimertinib sensitivity in NSCLC. This study provides a novel therapeutic strategy for overcoming Osimertinib resistance in NSCLC treatment.

Here, we show that a combination of bromodomain and extra-terminal protein family inhibitor, NHWD-870, and Bacillus Calmette-Guérin vaccine is a promising therapeutic strategy for melanomas...Furthermore, our findings are reinforced by a humanized patient-derived xenograft (PDX) model, which exhibits notable antitumor effects in humanized tumor-bearing mice treated with the combination therapy. Our study underscores the immense potential of this therapeutic approach for clinical practice, offering promising prospects in overcoming the limitations of current treatments.

To address the above issues, we developed an injectable TME-responsive nanocomposite hydrogel to simultaneously deliver an effective MYC inhibitor (NHWD-870) and IL11Rα-targeted liposomes containing cisplatin-loaded MnO2 (Cis/Mn@Lipo-IL11)...In the osteosarcoma-bearing model, the nanocomposite hydrogel significantly enhanced tumor T cell infiltration, induced effective anti-tumor immunity and attenuated lung metastasis. Therefore, our results reveal a powerful strategy for targeted combination therapy of MYC-amplified osteosarcoma.

The patient was treated with a combined regimen of radiotherapy of 70 Gy, chemotherapy with paclitaxel (albumin-bound), immunotherapy with nivolumab, targeted therapy with anlotinib and BET inhibitor NHWD-870, but the patient died 7 months after diagnosis. Gene rearrangement detection is also helpful for diagnosis and treatment. At present, surgery and radiation are still first choices for NC, and advances in targeted immunotherapy such as bromodomain and end motif inhibitors (BETi) may bring better treatment options to patients.

While NHWD-870 could inhibit IRF7 and phosphorylated-IRF7 expression in vivo and in vitro. These results indicate that NHWD-870 suppresses the maturation and activation of DCs by decreasing IRF7 proteins which finally alleviates psoriasis-like skin lesions, and NHWD-870 may be a potent therapeutic drug for psoriasis.

Thus, we screened for inhibitors that repress YAP1 expression and identified multiple bromodomain and extra-terminal (BET) inhibitors, including NHWD-870, as hits. We identified a new vulnerability for MEK inhibitor-resistant melanomas, which activated Hippo pathway due to elevated YAP1 activity. Inhibition of BRD4 using BET inhibitors suppressed YAP1 expression and led to blunted melanoma growth when combined with treatment with the MEK inhibitor trametinib.

NHWD-870 demonstrated substantial nephroprotective effects in reducing renal damage induced by ischemia-reperfusion injury in rats. These effects may be attributed to the anti-apoptotic properties, as indicated by increased levels of the anti-apoptotic protein Bcl-2, and the reduction in oxidative stress marker PGF-2 through upregulation of the PI3K/AKT signaling pathway, along with the decrease in the inflammatory marker IL-1B.

Finally, we confirmed the efficacy of synthetic lethal effects of NHWD-870 and cisplatin in antagonizing osteosarcoma in a preclinical PDX model. Taken together, these findings demonstrate that NHWD-870, as an effective BET inhibitor, may be a potential candidate for osteosarcoma intervention linked to its STAT3 signaling inhibitory activity. In addition, NHWD-870 appears to be a promising therapeutic strategy for bone-associated tumors, as it interferes with the vicious cycle of tumor progression and bone destruction.