MediciNova, Inc. announced it has received a Notice of Allowance from the Brazilian Patent and Trademark Office for a pending patent application which covers MN-001 (tipelukast) and MN-002 (a major metabolite of MN-001) for the treatment of hypertriglyceridemia, hypercholesterolemia, and hyperlipoproteinemia. Once issued, the patent maturing from this allowed patent application is expected to expire no earlier than July 2034. The allowed claims cover the use of MN-001 or MN-002 for reducing a triglyceride blood level, for reducing a total cholesterol blood level, and for reducing a low density lipoprotein (LDL) blood level.

The allowed claims cover oral administration including liquid and solid dosage forms. The allowed claims cover a wide range of doses and a range of different dosing frequencies. MN-001 (tipelukast) is a novel, orally administered, small molecule compound with multiple mechanisms of action which has been in clinical development for the treatment of chronic inflammatory and fibrotic diseases, among others, due to its anti-inflammatory and anti-fibrosis effects. Based on the finding that MN-001 (tipelukast) reduces triglycerides (TG) in the blood from previous clinical trials, the company conducted a Phase 2 clinical trial in patients with hypertriglyceridemia and NASH or NAFLD.

Based on the findings from the in-vitro mechanistic study of MN-001 (tipelukast), a subgroup analysis of the Phase 2 clinical trial showed a stronger improvement in lipid profile in the NASH/NAFLD patients with a history of diabetes. Therefore, a new Phase 2 clinical trial was initiated to investigate the effect of MN-001 (tipelukast) in NAFLD patients with type 2 diabetes and hypertriglyceridemia. The molecular mechanism of action of MN-001 (tipelukast) includes leukotriene receptor antagonism and inhibition of phosphodiesterase (mainly 3 and 4) and 5-lipoxygenase (5-LO) and these multiple mechanisms are believed to reduce inflammation and prevent fibrosis.

The company has also confirmed that MN-001 (tipelukast) suppresses fibrosis-promoting genes such as LOXL2, Collagen Type 1, and TIMP-1 and suppresses inflammation-promoting genes such as CCR2 and MCP-1 in a fibrosis disease model study. Although the direct mechanism of action of MN-001 (tipelukast) on TG reduction in blood has not yet been fully clarified. In various animal models of fibrosis disease, MN-001 (tipelukast) has been shown to improve fibrosis on histopathological examination, and the FDA has granted Fast Track status to MN-001 (tipelukast) for the treatment of NASH with fibrosis.

MN-001 (tipelukast) has also been granted Fast Track status and Orphan Drug designation for the treatment of idiopathic pulmonary fibrosis. In the past, the company have conducted clinical trials for MN-001 (tipelukast) for the treatment of bronchial asthma and interstitial cystitis, and more than 600 patients have been treated with MN-001 (tipelukast) to date, confirming its good safety and tolerability profile.