A-485 是 p300/CBP 的强效选择性催化抑制剂，对 p300 和 CBP 组蛋白乙酰转移酶 (HAT) 的 IC₅₀ 值分别为 9.8 nM 和 2.6 nM。

A-485 is a potent and selective catalytic inhibitor of p300/CBP with IC 50 s of 9.8?nM and 2.6?nM for p300 and CBP histone acetyltransferase (HAT), respectively.

Solid

IC50: 9.8 nM (p300), 2.6 nM (CBP)

A three-hour treatment of prostate adenocarcinoma PC-3 cells with A-485 results in a dose-dependent decrease in H3K27Ac, with a half maximal effective concentration (EC50) of 73 nM. Treatment with A-485 does not alter p300 or CBP protein levels.
The broadest sensitivity is observed in haematological tumours, where A-485 exhibits potent activity in most multiple myeloma cell lines, and in a subset of acute myeloid leukaemia lines and non-Hodgkin’s lymphoma lines. A-485 induces a comparable decrease in H3K27Ac in all five prostate cancer cell lines. has not independently confirmed the accuracy of these methods. They are for reference only.

After tumours are established in SCID male mice, twice daily intraperitoneal injections of A-485 induce 54% tumour growth inhibition after 21 days of dosing (P<0.005 as compare to vehicle control). In addition, in tumour-bearing animals, dosing with A-485 for seven days induces a decrease in the mRNA levels of MYC and the AR-dependent gene SLC45A3 at three hours post-dosing, and (for MYC) a decrease in the protein level, indicating that A-485 inhibits p300-mediated transcriptional activity in vivo. However, at 16?hours post-dosing on the seventh day, A-485 drug levels in the plasma and tumour are decreased as compare to 3?hours. A-485 induces a moderate 9% body weight loss, and the animals recover rapidly upon completion of the A-485 dosing regimen. has not independently confirmed the accuracy o

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[1]. Lasko LM, et al. Discovery of a selective catalytic p300/CBP inhibitor that targets lineage-specific tumours. Nature. 2017 Oct 5;550(7674):128-132.

In Vitro: DMSO : 125 mg/mL (233.00 mM; Need ultrasonic)配制储备液