PTP1B-IN-3 diammonium is a potent and orally active PTP1B inhibitor with IC50s of 120 nM for both PTP1B and TCPTP. PTP1B-IN-3 diammonium has antidiabetic and anticancer effects[1][2].
In diet-induced obese (DIO) mice, PTP1B-IN-3 (compounds 3g) exhibits dose dependent inhibition (60%, 80% and 100% inhibition at 1, 3 and 10 mg/kg, respectively) of glucose excursion when given orally 2 h before oral glucose challenge with an estimated ED50 of 0.8 mg/kg[1]. In the NDL2 Ptpn1 transgenic mice, PTP1B-IN-3 (compounds 3g; orally; 30 mg/kg for 21 days) shows a significant delay in the onset of tumor development in NDL2 Ptpn1+/+ mice, extending the median tumor free days (T50) from 28 days to 75 days[1]. In diet-induced obese (DIO) mice, PTP1B-IN-3 (compounds 3g) exhibits good oral bioavailability (F of 24%), slow clearance (CL of 0.71 mL/kg/min), and good elimination half live (t1/2 of 6 h). The oral bioavailability in higher species such as rats (F of 4%) and squirrel monkeys (F of 2%) are substantially lower but excellent exposures are achieved with oral dosing[1].
[1]. Yongxin Han, et al. Discovery of [(3-bromo-7-cyano-2-naphthyl)(difluoro)methyl]phosphonic acid, a potent and orally active small molecule PTP1B inhibitor. Bioorg Med Chem Lett. 2008 Jun 1;18(11):3200-5.
[2]. Price N, et al. Safety and Efficacy of a Topical Sodium Channel Inhibitor (TV-45070) in Patients With Postherpetic Neuralgia (PHN): A Randomized, Controlled, Proof-of-Concept, Crossover Study, With a Subgroup Analysis of the Nav1.7 R1150W Genotype. Clin J Pain. 2017 Apr;33(4):310-318.