A Novel TNF-α Converting Enzyme (TACE) Selective Inhibitor JTP-96193 Prevents Insulin Resistance in KK-A y Type 2 Diabetic Mice and Diabetic Peripheral Neuropathy in Type 1 Diabetic Mice

• Published in: Biological & pharmaceutical bulletin Vol. 42; no. 11; p. 1906
• Main Authors: Maekawa, Mariko, Tadaki, Hironobu, Tomimoto, Daisuke, Okuma, Chihiro, Sano, Ryuhei, Ishii, Yukihito, Katsuda, Yoshiaki, Yoshiuchi, Hiromi, Kakefuda, Reina, Ohta, Takeshi, Sasase, Tomohiko
• Format: Journal Article
• Language: English
• Published: Japan 2019
• Subjects: ADAM17 Protein - antagonists & inhibitors; ADAM17 Protein - metabolism; Adipose Tissue - drug effects; Adipose Tissue - metabolism; Animals; Blood Glucose - metabolism; Diabetes Mellitus, Experimental - drug therapy; Diabetes Mellitus, Experimental - metabolism; Diabetes Mellitus, Type 1 - drug therapy; Diabetes Mellitus, Type 1 - metabolism; Diabetes Mellitus, Type 2 - drug therapy; Diabetes Mellitus, Type 2 - metabolism; Diabetic Neuropathies - blood; Diabetic Neuropathies - drug therapy; Insulin Resistance; Male; Mice; Mice, Inbred C57BL; Mice, Inbred ICR; Rats; Rats, Inbred Lew; Tumor Necrosis Factor-alpha - metabolism; diabetic peripheral neuropathy; TNF-α converting enzyme (TACE); diabetes; insulin resistance; tumor necrosis factor-α (TNF-α)
• ISSN: 1347-5215

Tumor necrosis factor-α (TNF-α) converting enzyme/a disintegrin and metalloproteinase domain-containing protein 17 (TACE/ADAM17) is a key sheddase that releases TNF-α from its inactive precursor and is thought as a new drug target to inhibit TNF-α production. In the present study, pharmacological effects of a novel TACE selective inhibitor, JTP-96193, on type 2 diabetes and diabetic peripheral neuropathy (DPN) as its major complication was examined. Enzyme inhibitory activity of JTP-96193 on TACE and other ADAMs was measured in in vitro. High fat-induced obese mice and type 2 diabetic KK-A mice were used to evaluate the effect of JTP-96193 on insulin resistance. Finally, streptozotocin (STZ)-induced diabetic mice were treated with JTP-96193 to evaluate the sciatic motor nerve conduction velocities (MNCV). JTP-96193 selectively inhibited human TACE activity with IC value of 5.4 nM and showed more than 1800-fold selectivity against other matrix metalloproteinases. In mouse models of obesity and diabetes, JTP-96193 reduced the TNF-α release from the fat tissue and prevented development of diabetes and improved insulin resistance, respectively. Furthermore, JTP-96193 prevented delay of sciatic MNCV without any effects on blood glucose or insulin levels in STZ-induced diabetic mice. TACE inhibitor is effective on insulin resistance and DPN independent from glucose-lowering effect. These pharmacological properties of JTP-96193 may be helpful to treat type 2 diabetes accompanied by its microvascular complications.