(R)-BPO-27_product_DataBase

Bioactivity

(R)-BPO-27, the R enantiomer of BPO-27, is a potent, orally active and ATP-competitive CFTR inhibitor with an IC50 of 4 nM.

Target

IC50: 4 nM

Invitro

(R)-BPO-27 exhibits a dose-response inhibition and inhibits the CFTR current by 50% at 0.53 nM in HEK-293T cells. (R)-BPO-27 acts from the cytoplasmic side and has low membrane permeability[1].(R)-BPO-27 reduces the channel open probability (NPo) from 0.29 to 0.08, modestly reduces in mean channel open time, and strongly increases mean channel closed time in HEK-293T cells expressing human wild-type CFT in a single-channel patch-clamp experiment. Meanwhile, (S)-BPO-27 does not affect any of these parameters[1].(R)-BPO-27 is applied directly to the cytoplasmic membrane surface and stabilizes the CFTR channel closed state with an IC50 of 600 pM in Single-channel electrophysiology assay[2].(R)-BPO-27 (10 μM, 10 min pretreatment) inhibits Cl- current with apparent IC50 values of 5 and 10 nM for CPT-cAMP and 8-Br-cGMP, respectively, in CFTR-expressing FRT cells after CFTR stimulation by cAMP agonist. the IC50 of 4 nM for inhibition of forskolin-stimulated CFTR Cl- current in FRT cells[3].

In Vivo

(R)-BPO-27 (interperitoneal administration; 10 mg/kg) decays with t1/2≈1.6 h and gives sustained therapeutic concentrations in kidney in a PK study[1].(R)-BPO-27 (intraperitoneal injection; 5 mg/kg; 30 min before abdominal surgery) prevents fluid accumulation in closed midjejunal loops produced by cholera toxin, giving an intestinal loop weight/length ratio similar to that in PBS-injected loops. This effect is dose-dependently and the IC50 value is 0.1 mg/kg[3].(R)-BPO-27 (intraperitoneal injection or oral administration; 5 mg/kg) shows a slow (R)-BPO-27 metabolism and produces sustained serum (R)-BPO-27 levels for at least 4 h. The AUC analysis gave an oral bioavailability of ∼94% for (R)-BPO-27 in mouse pharmacokinetics and toxicity study[3]. Animal Model:

Name

(R)-BPO-27

CAS

1415390-47-4

Formula

C26H18BrN3O6

Molar Mass

548.34

Appearance

Solid

Transport

Room temperature in continental US; may vary elsewhere.

Storage

Powder	-20°C	3 years
	4°C	2 years
In solvent	-80°C	6 months
	-20°C	1 month

Reference

[1]. Snyder DS, et al. Absolute Configuration And Biological Properties of Enantiomers of CFTR Inhibitor BPO-27. ACS Med Chem Lett. 2013 May 9;4(5):456-459. [2]. Kim Y, et al. Benzopyrimido-pyrrolo-oxazine-dione (R)-BPO-27 Inhibits CFTR Chloride Channel Gating by Competition with ATP. Mol Pharmacol. 2015 Oct;88(4):689-96. [3]. Onur Cil, et al.Benzopyrimido-pyrrolo-oxazine-dione CFTR inhibitor (R)-BPO-27 for antisecretory therapy of diarrheas caused by bacterial enterotoxins. FASEB J. 2017 Feb;31(2):751-760.

PeptideDB

(R)-BPO-27

CAS: 1415390-47-4 F: C26H18BrN3O6 W: 548.34