For research use only. Not for therapeutic Use.
ICA-105665 (PF-04895162) is a potent and orally active neuronal Kv7.2/7.3 and Kv7.3/7.5 potassium channels opener. ICA-105665 inhibits liver mitochondrial function and bile salt export protein (BSEP) transport (IC50 of 311 μM). ICA-105665 can penetrate the blood-brain barrier and has antiseizure effects[1][2][3][4].
ICA-105665 (PF-04895162) does not display potent cytotoxic properties in THLE and HepG2 cell lines (IC50 ~192 μM and 130 μM after 72 hours, respectively) or in human hepatocytes (AC50 for cell loss at 48 hours was >125 μM based on results in three assessments in two different human hepatocyte lots (LBN and HU4165)[1].
Mitochondrial respiratory reserve is compromised in human hepatocytes treated with ICA-105665 (PF-04895162) at concentrations >11 μM for 25 minutes[1].
For ICA-105665 (PF-04895162), in a 7-day rat toxicity study, dose-dependent alanine aminotransferase (ALT) elevations, potentially indicative of liver toxicity, were observed. However, no histological evidence of liver injury was identified, and ALT elevations were not confirmed in a repeat 7-day study. Further, 28 day and 6 month toxicity studies in rats were negative for transaminase elevations and liver toxicity, and toxicity studies up to 9 months duration in cynomolgus monkeys were also negative[2].
ICA-105665 (PF-04895162) has demonstrated broad spectrum antiseizure activity in multiple animal models including maximal electroshock, 6 Hz seizures, pentylenetetrazole, and electrical kindling at doses from <1 to 5 mg/kg[3].
| Catalog Number | I045898 |
| CAS Number | 2694728-63-5 |
| Synonyms | N-(2-cyclopropyl-7-fluoro-4-oxoquinazolin-3-yl)-2-(4-fluorophenyl)acetamide |
| Molecular Formula | C19H15F2N3O2 |
| Purity | ≥95% |
| InChI | InChI=1S/C19H15F2N3O2/c20-13-5-1-11(2-6-13)9-17(25)23-24-18(12-3-4-12)22-16-10-14(21)7-8-15(16)19(24)26/h1-2,5-8,10,12H,3-4,9H2,(H,23,25) |
| InChIKey | QVQACHQOSXTOLH-UHFFFAOYSA-N |
| SMILES | C1CC1C2=NC3=C(C=CC(=C3)F)C(=O)N2NC(=O)CC4=CC=C(C=C4)F |
| Reference | [1]. Aleo MD, et al. Phase I study of PF‐04895162, a Kv7 channel opener, reveals unexpected hepatotoxicity in healthy subjects, but not rats or monkeys: clinical evidence of disrupted bile acid homeostasis. Pharmacol Res Perspect. 2019 Feb;7(1):e00467. [2]. Generaux G, et al. Quantitative systems toxicology (QST) reproduces species differences in PF-04895162 liver safety due to combined mitochondrial and bile acid toxicity. Pharmacol Res Perspect. 2019 Oct 9;7(6):e00523. [3]. Kasteleijn-Nolst Trenité DG, et al. Kv7 potassium channel activation with ICA-105665 reduces photoparoxysmal EEG responses in patients with epilepsy. Epilepsia. 2013 Aug;54(8):1437-43. [4]. Bialer M, et al. Progress report on new antiepileptic drugs: a summary of the Eleventh Eilat Conference (EILAT XI). Epilepsy Res. 2013 Jan;103(1):2-30. |
