Sotuletinib (BLZ945) 是一种有效，选择性和脑渗透性的 CSF-1R (c-Fms) 抑制剂，IC₅₀ 为 1 nM，选择性是其他受体酪氨酸激酶同系物的 1000 倍。

Sotuletinib (BLZ945) is a potent, selective and brain-penetrant CSF-1R (c-Fms) inhibitor with an IC 50 of 1 nM, showing more than 1,000-fold selectivity against its closest receptor tyrosine kinase homologs.

Solid

IC50: 1 nM (CSF-1R), 3.2 μM (c-Kit), 4.8 μM (PDGFRβ), 9.1 μM (Flt3)

Treatment of bone marrow-derived macrophages (BMDMs) with Sotuletinib inhibits CSF-1-dependent proliferation (EC50=67 nM), and decreases CSF-1R phosphorylation, similar to CSF-1R antibody blockade. Sotuletinib also reduces viability of CRL-2467 microglia, Ink4a/Arf BMDMs (PDG genetic background), and NOD/SCID BMDMs. Importantly, Sotuletinib treatment in culture does not affect proliferation of any PDG-derived tumor cell lines (all Csf-1r -negative), or U-87 MG human glioma cells, and PDG cell tumor sphere formation is unaffected. Thus, Sotuletinib has no direct effects on glioma cells, and perturbs macrophage survival through CSF-1R inhibition. has not independently confirmed the accuracy of these methods. They are for reference only.

Mice are treated with Sotuletinib or vehicle, and evaluated for symptom-free survival. Median survival in the vehicle-treated cohort is 5.7 weeks. In striking contrast, Sotuletinib significantly improves long-term survival with 64.3% surviving to the 26-week trial endpoint. This endpoint is chosen because Ink4a/Arf mice develop spontaneous tumors, including lymphomas and sarcomas, beginning at ~30 weeks. Sotuletinib is well-tolerated over long-term treatment, with no visible side-effects, consistent with histopathological studies. Histological grading revealed high-grade, invasive gliomas in all vehicle-treated mice. By contrast, Sotuletinib-treated animals have significantly less-malignant tumors, and no detectable lesions in 55.6% of asymptomatic mice at the endpoint. Mice receiving Sotuletinib shows reduced CSF1R staining in both cervical tumors and the associated st

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Powder -20°C 3 years；4°C 2 years

[1]. Pyonteck SM, et al. CSF-1R inhibition alters macrophage polarization and blocks glioma progression. Nat Med. 2013 Oct;19(10):1264-72.
[2]. Strachan DC, et al. CSF1R inhibition delays cervical and mammary tumor growth in murine models by attenuating the turnover of tumor-associated macrophages and enhancing infiltration by CD8+ T cells. Oncoimmunology. 2013 Dec 1;2(12):e26968.

In Vitro: DMSO : 83.33 mg/mL (209.12 mM; Need ultrasonic)配制储备液