Synthesis, computational studies and antioxidant activity of some 3-(2-alkylamino-4-aminothiazole-5-oyl) pyridines

A series of thiazoloylpyridine derivatives has been synthesized and analyzed to confirm the structure of the product using IR, 1H and 13C NMR, mass spectra and analytical data. Optimized structural and electronic parameters of all the compounds have been calculated by using B3LYP/ 6-31G basis set. The Mulliken charges of all atoms have been evaluated. The calculated IR spectrum has been analyzed by comparing the experimental IR. All the synthesized compounds have been examined for antioxidant activities. The antioxidant activity of 3-(2-alkylamino-4-aminothiazol -5-oyl)pyridines have been analyzed using DPPH radical scavenging assay. The compounds 6a and 6b possess higher radical scavenging activity.

Synthesis, DFT calculations, NBO analysis and docking studies of 3-(2-arylamino-4-aminothiazol-5-oyl)pyridine derivatives

Electronic structure of 3-(2-arylamino-4-aminothiazol-5-oyl)pyridine derivatives are investigated theoretically using B3LYB/6-31G (d,p) method. The energy gap between HOMO-LUMO and several thermodynamic properties in the ground state are calculated by means of B3LYP hybrid density functional theory (DFT) method together with 6-31G basis sets. A series of pyridinyl thiazoles were synthesized and characterized. The molecular docking studies were done using PyRx virtual screening tool in the active site of Hepg-2 (PDB code 4mmh) to study the hydrogen bonding interaction of these analogs. ADME properties and the hydrophobicity are found to be critical for activity. It is observed that all the synthesized compounds can be used orally as good drug candidates and the docking scores are comparable to the standard compounds. The compound C3 is found to have the highest activity against the cancer (PDB code: 4mmh)  protein.

Synthesis, characterization, dft calculation, docking studies, antioxidant and anticancer activities of some 3-(2-alkylaminothiazol-5-oyl)pyridines

620-626The 3-(2-alkylaminothiazol-5-oyl)pyridines were synthesized and characterized by different physicochemical techniques such as IR, 1H NMR, MS, electronic parameters etc. Geometrical and electronic properties of 3-(2-alkylaminothiazol-5-oyl)pyridines derivatives was computed theoretically using B3LYP /6-31G (d, p) basis sets. The energy gap between HOMO and LUMO explained the charge transfer within the molecule. The optimized structures of all the derived compound shows that in-plane and out of a plane in the molecule. All the compounds exhibited good docking scores against 4mmh liver cancer. The antioxidant study also evaluated excellent IC50 value. It shows the best inhibitory concentration against breast cancer. Among the 3-(2-alkylaminothiazol-5-oyl)pyridines, compound 6a was highly active on the MDA-MB-231 breast cancer cell line

In-vivo anterior segment OCT imaging provides unique insight into cerulean blue-dot opacities and cataracts in Down syndrome

Down syndrome (DS) is frequently associated with cataract, but there remains scant information about DS cataract morphology. Supra-nuclear cataracts in DS have been proposed as indicative of betaamyloid (Aß) aggregation and thus potential biomarkers for Alzheimer’s (AD). This study employed anterior segment OCT (AS-OCT) and slit-lamp (SL) photography to image the crystalline lens in DS, compared with adult controls. Lens images were obtained post-dilation. Using MATLAB, AS-OCT images were analysed and lens opacities calculated as pixel intensity and area ratios. SL images were classifed using LOCS III. Subjects were n=28 DS (mean±SD 24.1±14.3years), and n=36 controls (54.0±3.4years). Forthe DS group,AS-OCT imaging revealed the frequent presence of small dot opacities (27 eyes, 50%) in the cortex and nucleus ofthe lens, covering an area ranging from 0.2–14%. There was no relation with age or visual acuity and these dot opacities (p>0.5) and they were not present in any control lenses. However, their location and morphology does not coincide with previous reports linking these opacities with Aß accumulation andAD. Four participants (14%) in the DS group had clinically signifcant age-related cataracts, butthere was no evidence of early onset of age-related cataracts in DS.Peer ReviewedPostprint (author's final draft

In-vivo anterior segment OCT imaging provides unique insight into cerulean blue-dot opacities and cataracts in Down syndrome

Down syndrome (DS) is frequently associated with cataract, but there remains scant information about DS cataract morphology. Supra-nuclear cataracts in DS have been proposed as indicative of beta-amyloid (Aβ) aggregation and thus potential biomarkers for Alzheimer’s (AD). This study employed anterior segment OCT (AS-OCT) and slit-lamp (SL) photography to image the crystalline lens in DS, compared with adult controls. Lens images were obtained post-dilation. Using MATLAB, AS-OCT images were analysed and lens opacities calculated as pixel intensity and area ratios. SL images were classified using LOCS III. Subjects were n = 28 DS (mean ± SD 24.1 ± 14.3years), and n = 36 controls (54.0 ± 3.4years). For the DS group, AS-OCT imaging revealed the frequent presence of small dot opacities (27 eyes, 50%) in the cortex and nucleus of the lens, covering an area ranging from 0.2–14%. There was no relation with age or visual acuity and these dot opacities (p > 0.5) and they were not present in any control lenses. However, their location and morphology does not coincide with previous reports linking these opacities with Aβ accumulation and AD. Four participants (14%) in the DS group had clinically significant age-related cataracts, but there was no evidence of early onset of age-related cataracts in DS

Synthesis, computational studies and antioxidant activity of some 3-(2-alkylamino-4-aminothiazole-5-oyl)pyridines

605-610A series of thiazoloylpyridine derivatives has been synthesized and analyzed to confirm the structure of the product using IR, 1H and 13C NMR, mass spectra and analytical data. Optimized structural and electronic parameters of all the compounds have been calculated by using B3LYP/ 6-31G basis set. The Mulliken charges of all atoms have been evaluated. The calculated IR spectrum has been analyzed by comparing the experimental IR. All the synthesized compounds have been examined for antioxidant activities. The antioxidant activity of 3-(2-alkylamino-4-aminothiazol -5-oyl)pyridines have been analyzed using DPPH radical scavenging assay. The compounds 6a and 6b possess higher radical scavenging activity

Synthesis, DFT calculations, NBO analysis and docking studies of 3-(2-arylamino-4-aminothiazol-5-oyl)pyridine derivatives

999-1006Electronic structure of 3-(2-arylamino-4-aminothiazol-5-oyl)pyridine derivatives are investigated theoretically using B3LYB/6-31G (d,p) method. The energy gap between HOMO-LUMO and several thermodynamic properties in the ground state are calculated by means of B3LYP hybrid density functional theory (DFT) method together with 6-31G basis sets. A series of pyridinyl thiazoles were synthesized and characterized. The molecular docking studies were done using PyRx virtual screening tool in the active site of Hepg-2 (PDB code 4mmh) to study the hydrogen bonding interaction of these analogs. ADME properties and the hydrophobicity are found to be critical for activity. It is observed that all the synthesized compounds can be used orally as good drug candidates and the docking scores are comparable to the standard compounds. The compound C3 is found to have the highest activity against the cancer (PDB code: 4mmh) protein

Synthesis, characterization, dft calculation, docking studies, antioxidant and anticancer activities of some 3-(2-alkylaminothiazol-5-oyl)pyridines

The 3-(2-alkylaminothiazol-5-oyl)pyridines were synthesized and characterized by different physicochemical techniques such as IR, 1H NMR, MS, electronic parameters etc. Geometrical and electronic properties of 3-(2-alkylaminothiazol-5-oyl)pyridines derivatives was computed theoretically using B3LYP /6-31G (d, p) basis sets. The energy gap between HOMO and LUMO explained the charge transfer within the molecule. The optimized structures of all the derived compound shows that in-plane and out of a plane in the molecule. All the compounds exhibited good docking scores against 4mmh liver cancer. The antioxidant study also evaluated excellent IC50 value. It shows the best inhibitory concentration against breast cancer. Among the 3-(2-alkylaminothiazol-5-oyl)pyridines, compound 6a was highly active on the MDA-MB-231 breast cancer cell line

Cathepsin S is the major activator of the psoriasis-associated proinflammatory cytokine IL-36γ

The pro-inflammatory cytokine IL-36γ is highly expressed in epithelial cells and is a pivotal mediator of epithelial inflammation. In particular, IL-36γ is strongly associated with the inflammatory skin disease psoriasis. As with other IL-1 cytokines, IL-36γ is expressed as an inactive precursor and must be processed by specific proteases to become bioactive. Our aim therefore was to identify protease/s capable of IL-36γ activation and explore the importance of this activation in psoriasis. Using a keratinocyte-based activity assay in conjunction with small-molecule inhibitors and siRNA gene silencing, cathepsin S was identified as the major IL-36γ-activating protease expressed by epithelial cells. Interestingly, cathepsin S activity was strongly upregulated in samples extracted from psoriasis patients, relative to healthy controls. In addition, IL-36γ-Ser18, identified as the main product of cathepsin S-dependent IL-36γ cleavage, induced psoriasiform changes in human skin-equivalent models. Together, these data provide important mechanistic insights into the activation of IL-36γ, and highlight that cathepsin S-mediated activation of IL-36γ may be important in the development of numerous IL-36γ driven pathologies, in addition to psoriasis