Browsing by Author "Gunawan, Andrea Michelle"

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    Diversity-Oriented Synthesis for Novel, Selective and Drug-like Inhibitors for a Phosphatase from Mycobacterium Tuberculosis
    (Royal Society of Chemistry, 2014-10) He, Rongjun; Bai, Yunpeng; Yu, Zhi-Hong; Wu, Li; Gunawan, Andrea Michelle; Zhang, Zhong-Yin; Department of Biochemistry & Molecular Biology, IU School of Medicine
    Mycobacterium protein tyrosine phosphatase B (mPTPB) is a potential drug target of Tuberculosis (TB). Small molecule inhibitors of mPTPB could be a treatment to overcome emerging TB drug resistance. Using a Diversity-Oriented Synthesis (DOS) strategy, we successfully developed a salicylic acid based and drug-like mPTPB inhibitor with an IC50 of 2 μM and >20-fold specificity over many human PTPs, making it an excellent lead molecule for anti-TB drug discovery. In addition, DOS generated bicyclic salicylic acids are also promising starting points for acquiring inhibitors targeting other PTPs.
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    Organocatalytic Multicomponent Reaction for the Acquisition of a Selective Inhibitor of mPTPB, a Virulence Factor of Tuberculosis
    (Royal Society of Chemistry, 2013) He, Rongjun; Zeng, Li-Fan; He, Yantao; Wu, Li; Gunawan, Andrea Michelle; Zhang, Zhong-Yin; Biochemistry and Molecular Biology, School of Medicine
    Mycobacterium protein tyrosine phosphatase B (mPTPB) is essential for the survival and persistence of Mycobacterium in the host. Thus small molecule inhibitors of mPTPB are potential anti-TB agents. We developed an efficient organocatalytic multicomponent reaction (MCR) between pyrrole, formaldehyde and aniline, affording a potent and selective mPTPB inhibitor with an IC(50) value of 1.5 μM and >50-fold specificity. Our studies provide a successful example of using organocatalysis as a discovery tool for the acquisition of PTP inhibitors.