Publications by authors named "Sherin Dr"

Lam., commonly known as Malabar nutmeg or false nutmeg, is used in traditional medicine and as a spice. Our exploration focuses on malabaricones, a distinct group of secondary metabolites isolated from the fruit rind of .

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Pharmacologically active small organic molecules derived from natural resources are prominent drug candidates due to their inherent structural diversity. Herein, we explored one such bioactive molecule, niloticin, which is a tirucallane-type triterpenoid isolated from the stem barks of (Wall.) Parker.

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Artonin E (AA2) and artobiloxanthone (AA3) were extracted and purified from the acetone extract of the stem bark of (Parkinson) Fosberg. Preliminary investigations of both candidates revealed promising cytotoxic effects in oral cancer cells. Moreover, these candidates modulated the expression of pivotal proteins linked to oral cancer progression, eliciting apoptosis through caspase-3 and caspase-9 activation.

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NF-κB has become a predominant regulator responsible for multiple physiological and pathological processes. NF-κB signaling pathway has canonical and non-canonical components which strategize the cancer-related metabolic processes. Non-canonical NF-κB pathways are known to contribute towards the chemoresistance of cancer cells.

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Melanoma is the most aggressive among all types of skin cancers. The current strategies against melanoma utilize BRAF, as a focal point for targeted therapy. However, therapy resistance developed in melanoma patients against the conventional anti-melanoma drugs hinders the ultimate benefits of targeted therapies.

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Linear and nonlinear optical properties of near-infrared laser grade dye LDS 821 in different solvents and Salmon Deoxyribonucleic acid (DNA) were studied using spectroscopic and Z-scan techniques. UV-Vis absorption spectrum of the dye shows a bathochromic shift with a decrease in the solvent polarity parameter, and in DNA, the dye exhibits a hypochromic shift. The fluorescence spectrum of the dye does not show any notable correlation with the solvent polarity parameter, but in DNA, the fluorescence intensity of the dye decreases with the incremental addition of DNA.

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Drug repurposing is one of the modern techniques used in the drug discovery to find out the new targets for existing drugs. Insilico methods have a major role in this approach. We used 60 FDA approved antiviral drugs reported in the last 50 years to screen against different cancer cell receptors.

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COVID-19 outbreak is the recently reported worldwide pandemic threat. As part of our interventions with machine learning and molecular simulation approaches, we report the inhibitory effect of thirty compounds reported from the sacred plant The predicted activity of the screened ligands are comparable with the one of the present medication, hydroxy chloroquine (HCQ), on the main protease (PDB:6YB7) of SARS-CoV-2. Our studies pointed out the effectiveness of the plant with twenty seven compounds having potential activity against the main protease compared to the reference HCQ.

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Triterpenoids are ubiquitously distributed secondary metabolites, primarily scrutinized as a source of medication and preventive measures for various chronic diseases. The ease of isolation and excellent pharmacological properties of triterpenoids are notable reasons behind the exponential rise of extensive research on the bioactive triterpenoids over the past few decades. Herein, we attempted to explore the anticancer potential of the fruit extract of the ethnomedicinal plant against oral squamous cell carcinoma (OSCC) and have exclusively attributed the efficacy of the extracts to the presence of two triterpenoids, namely, betulinic acid (BA) and koetjapic acid (KA).

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We report a commercially available benzothiazolium based dye LDS 821 (Styryl 9M) as a near infrared fluorescent probe for the detection of lysozyme amyloid fibrils. Change in the photophysical properties of the dye with respect to the change in viscosity of the environment is investigated. Increment in fluorescence lifetime and quantum yield with increment in viscosity proves the dye as a molecular rotor.

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Among different possible non-classical structures, the stabilization of half-planar tetracoordinate carbon conformation is believed to be the most difficult one. Herein, we designed three types of half-planar tetracoordinate carbon compounds computationally by employing hybrid stabilization effects of substituents. The axial hydrogens of unstable half-planar methane are substituted with π-acceptor and σ-donor substituents such as -BH , -Li and the equatorial substituents selected are a combination of electropositive atoms (σ-donors)/electronegative atoms (σ-acceptors and π-donors).

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Hydnocarpin (Hy) is a flavonoid isolated and purified from the seeds of Blume. Herein, we have developed a built-in semi-synthetic modification on Hy by one-pot multi-component reaction and a [3 + 2] cycloaddition strategy to append five membered isoxazole and isoxazolone as new phytochemical entities (NPCEs). Two selected NPCEs viz Hy-ISO-VIII and Hy-ISO-G from the library of 20 newly synthesized derivatives after in vitro screening unveiled promising cytotoxicity and induced caspase-mediated apoptosis against the human lung and melanoma cancer cells which were well supported by virtual screening based on ligand binding affinity and molecular dynamic simulations.

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Promalabaricone B (PMB), an acylphenol was isolated from dichloromethane-soluble extract of the seeds of Houtt. PMB exhibited significant inhibitory activity on -glucosidase enzyme. The molecular docking and dynamics studies of PMB with human maltase-glucoamylase were performed.

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Serotonin receptor, 5-HTR, agonists and partial agonists have established drug candidates for psychiatric and neurologic disorders. Recently, we reported the synthesis and evaluation of arylpiperazine derivatives of 3,5-dioxo-(2H,4H)-1,2,4-triazine as 5-HTR ligands. Herein, we generated a homology model of the receptor and docked the ligands against it, predicted the stability of the receptor model and complexes by molecular dynamics and generated a 3D-QSAR model for the arylpiperazine derivatives of 3,5-dioxo-(2H,4H)-1,2,4-triazine.

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Background: 'Phytonutrients' have been reported to exert an incredible impact on the healthcare system and offer medical benefits including the prevention or treatment of lifestyle-associated diseases. We chose one of the most common and important plant families, Musaceae, for our present study and explored its antidiabetic potential.

Results: Seeds of the edible fruits of Musa balbisiana Colla.

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Phytochemical investigation of the stem bark of Myristica fatua Houtt. led to the isolation of a new compound 1 (3-tridecanoylbenzoic acid), along with six known acylphenols (2-7). All the compounds displayed moderate inhibitory activity on α-amylase and significant activity on α-glucosidase; however malabaricone B (6) and C (7) were identified as potent α-glucosidase inhibitors with IC values of 63.

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Chronic myeloid leukemia (CML), a hematological malignancy arises due to the spontaneous fusion of the BCR and ABL gene, resulting in a constitutively active tyrosine kinase (BCR-ABL). Pharmacological activity of Gallic acid and 1,3,4-Oxadiazole as potential inhibitors of ABL kinase has already been reported. Objective of this study is to evaluate the ABL kinase inhibitory activity of derivatives of Gallic acid fused with 1,3,4-Oxadiazole moieties.

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A solvent-free, mechanochemical method for the synthesis of curcumin (1) derived 3,5-bis(styryl)pyrazoles and 3,5-bis(styryl)isoxazole (2a-g) at room temperature, with very short reaction time, is reported. Such earlier structural modifications of curcumin, at its β-diketone unit by transforming it into an isosteric pyrazole or isoxazole unit, required prolonged heating. The evaluation of the antioxidant activity of these compounds, based on DPPH, FRAP, and β-carotene bleaching assays, showed that several of these azoles are better antioxidants than curcumin, with the isoxazole derivative 2g being overall the best.

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Calcium/calmodulin dependent protein kinase II (CaMKII) is involved in the mechanisms underlying higher order brain functions such as learning and memory. CaMKII participates in pathological glutamate signaling also, since it is activated by calcium influx through the N-methyl-d-aspartate type glutamate receptor (NMDAR). In our attempt to identify phytomodulators of CaMKII, we observed that curcumin, a constituent of turmeric and its analogs inhibit the Ca(2+)-dependent and independent kinase activities of CaMKII.

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