Pharmaceutical Sciences and Natural Products - Research Publications

Permanent URI for this collectionhttps://kr.cup.edu.in/handle/32116/56

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    PROTAC�ing oncoproteins: targeted protein degradation for cancer therapy
    (BioMed Central Ltd, 2023-03-30T00:00:00) Kelm, Jeremy M.; Pandey, Deepti S.; Malin, Evan; Kansou, Hussein; Arora, Sahil; Kumar, Raj; Gavande, Navnath S.
    Molecularly targeted cancer therapies substantially improve patient outcomes, although the durability of their effectiveness can be limited. Resistance to these therapies is often related to adaptive changes in the target oncoprotein which reduce binding affinity. The arsenal of targeted cancer therapies, moreover, lacks coverage of several notorious oncoproteins with challenging features for inhibitor development. Degraders are a relatively new therapeutic modality which deplete the target protein by hijacking the cellular protein destruction machinery. Degraders offer several advantages for cancer therapy including resiliency to acquired mutations in the target protein, enhanced selectivity, lower dosing requirements, and the potential to abrogate oncogenic transcription factors and scaffolding proteins. Herein, we review the development of proteolysis targeting chimeras (PROTACs) for selected cancer therapy targets and their reported biological activities. The medicinal chemistry of PROTAC design has been a challenging area of active research, but the recent advances in the field will usher in an era of rational degrader design. � 2023, This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.
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    Targeting the Epidermal Growth Factor Receptor with Molecular Degraders: State-of-the-Art and Future Opportunities
    (American Chemical Society, 2023-02-22T00:00:00) Maity, Pritam; Chatterjee, Joydeep; Patil, Kiran T.; Arora, Sahil; Katiyar, Madhurendra K.; Kumar, Manvendra; Samarbakhsh, Amirreza; Joshi, Gaurav; Bhutani, Priyadeep; Chugh, Manoj; Gavande, Navnath S.; Kumar, Raj
    Epidermal growth factor receptor (EGFR) is an oncogenic drug target and plays a critical role in several cellular functions including cancer cell growth, survival, proliferation, differentiation, and motility. Several small-molecule tyrosine kinase inhibitors (TKIs) and monoclonal antibodies (mAbs) have been approved for targeting intracellular and extracellular domains of EGFR, respectively. However, cancer heterogeneity, mutations in the catalytic domain of EGFR, and persistent drug resistance limited their use. Different novel modalities are gaining a position in the limelight of anti-EGFR therapeutics to overcome such limitations. The current perspective reflects upon newer modalities, importantly the molecular degraders such as PROTACs, LYTACs, AUTECs, and ATTECs, etc., beginning with a snapshot of traditional and existing anti-EGFR therapies including small molecule inhibitors, mAbs, and antibody drug conjugates (ADCs). Further, a special emphasis has been made on the design, synthesis, successful applications, state-of-the-art, and emerging future opportunities of each discussed modality. � 2023 American Chemical Society.
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    Molecular dynamics and 3D-QSAR studies on indazole derivatives as HIF-1? inhibitors
    (Taylor and Francis Ltd., 2022-03-23T00:00:00) Singh, Yogesh; Sanjay, Kulkarni Swanand; Kumar, Pradeep; Singh, Satwinder; Thareja, Suresh
    Hypoxia-inducible factor (HIF) is a transcriptional factor which plays a crucial role in tumour metastasis thereby responsible for development of various forms of cancers. Indazole derivatives have been reported in the literature as potent HIF-1? inhibitor via interaction with key residues of the HIF-1? active site. Taking into consideration the role HIF-1? in cancer and potency of indazole derivative against HIF-1?; it was considered of interest to correlate structural features of known indazole derivatives with specified HIF-1? inhibitory activity to map pharmacophoric features through Three-dimensional quantitative structural activity relationship (3D-QSAR) and pharmacophore mapping. Field and Gaussian based 3D-QSAR studies were performed to realize the variables influencing the inhibitory potency of HIF-1? inhibitors. Field and Gaussian- based 3D-QSAR models were validated through various statistical measures generated by partial least square (PLS). The steric and electrostatic maps generated for both 3D-QSAR provide a structural framework for designing new inhibitors. Further; 3D-maps were also helpful in understanding variability in the activity of the compounds. Pharmacophore mapping also generates a common five-point pharmacophore hypothesis (A1D2R3R4R5_4) which can be employed in combination with 3D-contour maps to design potent HIF-1? inhibitors. Molecular docking and molecular dynamics (MD) simulation of the most potent compound 39 showed good binding efficiency and was found to be quite stable in the active site of the HIF-1? protein. The developed 3D-QSAR models; pharmacophore modelling; molecular docking studies along with the MD simulation analysis may be employed to design lead molecule as selective HIF-1? inhibitors for the treatment of Cancer. � 2022 Informa UK Limited, trading as Taylor & Francis Group.
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    A Perspective on Medicinal Chemistry Approaches for Targeting Pyruvate Kinase M2
    (American Chemical Society, 2021-11-02T00:00:00) Arora, Sahil; Joshi, Gaurav; Chaturvedi, Anuhar; Heuser, Michael; Patil, Santoshkumar; Kumar, Raj
    The allosteric regulation of pyruvate kinase M2 (PKM2) affects the switching of the PKM2 protein between the high-activity and low-activity states that allow ATP and lactate production, respectively. PKM2, in its low catalytic state (dimeric form), is chiefly active in metabolically energetic cells, including cancer cells. More recently, PKM2 has emerged as an attractive target due to its role in metabolic dysfunction and other interrelated conditions. PKM2 (dimer) activity can be inhibited by modulating PKM2 dimer�tetramer dynamics using either PKM2 inhibitors that bind at the ATP binding active site of PKM2 (dimer) or PKM2 activators that bind at the allosteric site of PKM2, thus activating PKM2 from the dimer formation to the tetrameric formation. The present perspective focuses on medicinal chemistry approaches to design and discover PKM2 inhibitors and activators and further provides a scope for the future design of compounds targeting PKM2 with better efficacy and selectivity. � 2021 American Chemical Society