VER-155008 是一种 Hsp70 的抑制剂，对 Hsp70，Hsc70 和 Grp7 的 IC₅₀ 值分别为 0.5 μM，2.6 μM 和 2.6 μM，对 Hsp70 的 K_d 值为 0.3 μM

Description	VER-155008 is an inhibitor of Hsp70, with IC50s of 0.5 μM, 2.6 μM, and 2.6 μM for Hsp70, Hsc70 and Grp7, respectively, and with a Kd of 0.3 μM for Hsp70.
IC50 & Target[1]	HSP70 0.5 μM (IC50) HSC70 2.6 μM (IC50) Grp78 2.6 μM (IC50)

In Vitro

VER-155008 is an inhibitor of Hsc70 and Hsp70, with IC₅₀s of 0.5 μM, 2.6 μM, and 2.6 μM for Hsp70, Hsc70 and Grp7, respectively, a with a K_d of 0.3 μM for Hsp70, but shows no activities against Hsp90, with an IC₅₀ of >200 μM. VER-155008 inhibits the proliferation of a variety of human colon and breast tumor cell lines, such as BT474, MB-468, HCT116 and HT29 cells, with GI₅₀s of 10.4 μM, 14.4 μM, 5.3 μM, and 12.8 μM, respectively. VER-155008 (5-40 μM) induces client protein degradation in HCT116 and BT474 carcinoma cells. VER-155008 also induces apoptosis in human tumor cell lines^[1]. VER-155008 (0.05-5 μM) reverses Aβ-induced axonal degeneration in cultured neurons^[2]. VER-155008 (10 μM or 25 μM) inhibits Hsp70 and suppresses the proliferation of LNCaP95 cells. VER-155008 also reduces full-length androgen receptor (AR-FL) and androgen receptor splice variant 7 (AR-V7) protein expression^[3].

In Vivo

VER-155008 (25 mg/kg, i.v.) exhibits plasma clearance in naive female BALB/c mice. VER-155008 (40 mg/kg, i.v.) also shows rapid plasma clearance, and reduces the tumor levels in the HCT116 tumor bearing nude BALB/c mice^[1]. VER-155008 (10 μmol/kg/day, i.p.) rescues memory deficits, and reduces axonal swelling associated with amyloid plaques in 5XFAD mice. VER-155008 (89.9 μmol/kg/day, i.p.) penetrates into the brain after administration in 5XFAD mice. VER-155008 also decreases amyloid plaques and PHF-tau associated with amyloid plaques in 5XFAD mice^[2].

References

• [1]. Massey AJ, et al. A novel, small molecule inhibitor of Hsc70/Hsp70 potentiates Hsp90 inhibitor induced apoptosis in HCT116 colon carcinoma cells. Cancer Chemother Pharmacol. 2010 Aug;66(3):535-45.

  [2]. Yang X, et al. Heat Shock Cognate 70 Inhibitor, VER-155008, Reduces Memory Deficits and Axonal Degeneration in a Mouse Model of Alzheimer's Disease. Front Pharmacol. 2018 Jan 30;9:48.

  [3]. Kita K, et al. Heat shock protein 70 inhibitors suppress androgen receptor expression in LNCaP95 prostate cancer cells. Cancer Sci. 2017 Sep;108(9):1820-1827.