In summary, this study shows the critical role of selective targeting of components of the HIF1α signaling pathway for the complete eradication of chronic myeloid leukemia cells.
Using a doxycycline-inducible JAK2 knockout (KO) system, we validated JAK2 dependency in CBFA2T3::GLIS2 cell lines, observing impaired proliferation in vitro and in vivo and apoptosis induction in vitro. Both type I (ruxolitinib) and type II (CHZ868) JAK2 inhibitors showed selective in vitro activity in CBFA2T3::GLIS2-positive AML models...Both approaches converged on MAPK pathway activation as a resistance mechanism to ruxolitinib treatment. Combining ruxolitinib with MEK inhibitors showed a synergistic effect in cell lines and patient-derived xenograft (PDX) cells expressing the fusion and in vivo activity in a CBFA2T3::GLIS2 AML PDX, suggesting a potential approach to target this signaling circuitry in this poor outcome AML subtype.
P2, N=83, Recruiting, Memorial Sloan Kettering Cancer Center | Trial completion date: Nov 2025 --> Nov 2026 | Trial primary completion date: Nov 2025 --> Nov 2026
12 days ago
Trial completion date • Trial primary completion date
Furthermore, exposure to the Janus kinase (JAK) inhibitor ruxolitinib and the signal transducer and activator of transcription (STAT)3 inhibitor stattic demonstrated that NME8 promoted RCC metastasis by activating the JAK/STAT signaling pathway...In conclusion, our findings suggest that NME8 contributes to RCC metastasis by promoting JAK/STAT-mediated EMT and modulating the tumor immune microenvironment. While elevated NME8 expression correlates with poor prognosis in public cohorts, its utility as a clinical prognostic biomarker requires further validation in independent patient populations.
12 days ago
Journal
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CDH1 (Cadherin 1) • STAT3 (Signal Transducer And Activator Of Transcription 3) • VIM (Vimentin)
The model was then intervened with a JAK2/STAT3 pathway inhibitor (ruxolitinib) or JAK2-specific small interfering RNA (siRNA)...: Inhibition of the JAK2/STAT3 pathway reduced the expression of inflammatory factors and oxidative stress markers in D-gal-treated NPCs. It also suppressed ECM degradation and apoptosis, delayed cellular senescence, and attenuated the progression of IVDD in rats.
In contrast, Type 2 mutations showed increased CALR dimerization and were partially resistant to antibody targeting but could be impacted by ruxolitinib triple combination. Together, our data demonstrate an ultra-precision medicine approach tailored to either Type 1 OR Type 2 mutation classes will be required for maximal efficacy and complete blockade of JAK/STAT signalling, with far-reaching implications for patient management.
18 days ago
Journal • CALR
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JAK2 (Janus kinase 2) • CALR (Calreticulin) • HSP90AA1 (Heat Shock Protein 90 Alpha Family Class A Member 1Heat Shock Protein 90 Alpha Family Class A Member 1)