mCLB073 is an advanced, orally active small molecule agonist specifically designed to target Mtb adenylyl cyclase Rv1625c. As an optimized derivative of V-59, it demonstrates significantly enhanced potency and efficacy for in vivo applications. In cholesterol-based media, mCLB073 shows a remarkable 17-fold increase in activity against Mtb compared to its predecessor, V-59, while retaining favorable pharmacokinetic characteristics and a strong safety profile. In preclinical studies, oral administration of mCLB073 at 30 mg/kg led to a substantial reduction in Mtb colony-forming units (CFUs) in the lungs of mice, accompanied by a 45% decrease in lung pathology severity. These findings highlight its potential as a promising therapeutic candidate for tuberculosis treatment.
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