Yazar "Shafiq, Zahid" seçeneğine göre listele

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    Sulfaquinoxaline-derived Schiff bases: Synthesis, characterization, biological profiling, and computational modeling
    (Elsevier B.V., 2025) Wajid, Muhammad; Uzair, Muhammad; Muhammad, Gulzar; Shafiq, Zahid; Siddique, Farhan; Kaya, Savas; Ahmad, Sajjad
    Here, six sulfaquinoxaline Schiff bases were synthesized, and various analytical techniques such as FTIR, 1HNMR, and 13CNMR were employed for the characterization. Additionally, in-vitro biological studies were performed, including antibacterial, antifungal, antioxidant, antidiabetic, and anti-inflammatory activities. Computational tools such as molecular docking, DFT, and MD simulations were applied to explore the binding interactions, molecular structure, and chemical reactivity of sulfaquinoxaline SBs. Lastly, in-silico ADMET studies were performed to investigate drug-likeness properties, toxicity, and metabolism of the synthesized SBs. The prepared SBs demonstrated strong antibacterial activity against S. agalactiae and E. coli better than the standard drug, sulfaquinoxaline. The SBs possessed non-significant antioxidant (DPPH assay) and antidiabetic activities (?-amylase and ?-glucosidase). All the derivatives depicted moderate anti-inflammatory activity except 6e (IC50 131.95 µg/mL) which presented comparable activity to the standard drug, diclofenac sodium (IC50 127.27 µg/mL). Computational analyses supported the experimental results, especially for compounds 5e and 6e confirming the robust binding affinities and enduring interactions of SBs with the protein target. In-silico drug-likeness analysis and ADMET prediction demonstrated that SBs were drug-like and had a satisfactory ADMET profile. © 2024 Elsevier B.V.
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    Synthesis, biological activity and docking calculations of bis-naphthoquinone derivatives from lawsone
    (5 June 2021) Riaz, Muhammad Tariq; Yaqub, Muhammad; Shafiq, Zahid; Ashraf, Abida; Khalid, Muhammad; Taslimi, Parham; Tas, Recep; Tuzun, Burak; Gulçin, İlhami
    Some metabolic enzyme inhibitors can be used as Multi-target-Directed-Ligands (MTDL) in Medicinal chemistry therefore, synthesis and determination of alternative inhibitors are essential. In this study, novel bisnapthoquinone derivatives (5a-o) were synthesized through a multi-component cascade reaction of two molecules of 2-hydroxy-1,4-naphthoquinone with an aromatic aldehyde in basic media using triethylamine as a catalyst. This novel heterocyclic derivatives (5a-o) are applied to inhibit the carbonic anhydrase (hCA I and hCA II) isoform in low levels of nano molecules with Ki values exist between 4.62 ± 1.01 to 70.45 ± 9.03 nM for hCA I and for hCA II which is physiologically dominant Kis values are in the range of 5.61 ± 1.04 to 73.26 ± 10.25 nM. Further these novel derivatives (5a-o) efficiently inhibit AChE with Ki values in the range of 0.13 ± 0.02 to 3.16 ± 0.56 nM. The compounds are also applied for BChE with Ki values varying between 0.50 ± 0.10 to 9.23 ± 1.15 nM. For α-glycosidase, the most efficient Ki values of 5e and 5f are 76.14 ± 9.60 and 95.27 ± 12.55 nM respectively. Finally, molecular docking calculations against enzymes (acetylcholinesterase, butyrylcholinesterase, and the human carbonic anhydrase I and II) are compared using biological activities of heterocyclic derivatives. After these calculations,an ADME/T analysis is performed to study the future medicinal use of heterocyclic derivatives from lawsone.