26 results on '"Haq S"'
Search Results
2. Laser-induced breakdown spectroscopy (LIBS) of animal fat (Lard): Efficient sample preparation for onsite analysis and influence of sample temperature on the signal intensity and plasma parameters
- Author
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Khan, M. Rashad, primary, Ibrahim, R.K. Raja, additional, Duralim, M., additional, Omer, M.F., additional, and U. Haq, S., additional
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- 2024
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3. Predicting potential invasion risks of Leucaena leucocephala(Lam.) de Wit in the arid area of Saudi Arabia
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Marifatul, Haq S., Mohammed, Darwish, Muhammad, Waheed, Manoj, Kumar, Manzer, Siddiqui H., and Rainer, Bussmann W.
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The presence of invasive plant species poses a substantial ecological impact, thus comprehensive evaluation of their potential range and risk under the influence of climate change is necessary. This study uses maximum entropy (MaxEnt) modeling to forecast the likelihood of Leucaena leucocephala(Lam.) de Wit invasion in Saudi Arabia under present and future climate change scenarios. Utilizing the MaxEnt modeling, we integrated climatic and soil data to predict habitat suitability for the invasive species. We conducted a detailed analysis of the distribution patterns of the species, using climate variables and ecological factors. We focused on the important influence of temperature seasonality, temperature annual range, and precipitation seasonality. The distribution modeling used robust measures of area under the curve (AUC) and receiver-operator characteristic (ROC) curves, to map the invasion extent, which has a high level of accuracy in identifying appropriate habitats. The complex interaction that influenced the invasion of L. leucocephalawas highlighted by the environmental parameters using Jackknife test. Presently, the actual geographic area where L. leucocephalawas found in Saudi Arabia was considerably smaller than the theoretical maximum range, suggesting that it had the capacity to expand further. The MaxEnt model exhibited excellent prediction accuracy and produced reliable results based on the data from the ROC curve. Precipitation and temperature were the primary factors influencing the potential distribution of L. leucocephala.Currently, an estimated area of 216,342 km2in Saudi Arabia was at a high probability of invasion by L. leucocephala.We investigated the potential for increased invasion hazards in the future due to climate change scenarios (Shared Socioeconomic Pathways (SSPs) 245 and 585). The analysis of key climatic variables, including temperature seasonality and annual range, along with soil properties such as clay composition and nitrogen content, unveiled their substantial influence on the distribution dynamic of L. leucocephala.Our findings indicated a significant expansion of high risk zones. High-risk zones for L. leucocephalainvasion in the current climate conditions had notable expansions projected under future climate scenarios, particularly evident in southern Makkah, Al Bahah, Madina, and Asir areas. The results, backed by thorough spatial studies, emphasize the need to reduce the possible ecological impacts of climate change on the spread of L. leucocephala.Moreover, the study provides valuable strategic insights for the management of invasion, highlighting the intricate relationship between climate change, habitat appropriateness, and the risks associated with invasive species. Proactive techniques are suggested to avoid and manage the spread of L. leucocephala, considering its high potential for future spread. This study enhances the overall comprehension of the dynamics of invasive species by combining modeling techniques with ecological knowledge. It also provides valuable information for decision-making to implement efficient conservation and management strategies in response to changing environmental conditions.
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- 2024
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4. COMPOSITIONAL ANALYSIS OF SILYBUM MARIANUM PLANT AT REDUCED PRESSURE USING CALIBRATION-FREE LIBS.
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QASIM, M., ANWAR-UL-HAQ, M., SHAH, AMIN, AFGAN, M. SHER, HAQ, S. U., KHAN, RAMEEZ ABBAS, and BAIG, M. ASLAM
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- 2024
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5. Synthesis and characterization of manganese-L-arginine framework (MOF) for antibacterial and antioxidant studies.
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Kiran, M., Yasin, Kh. A., Haq, S., Elmnasri, Kh., Ali, M. Ben, Boufahja, F., Shukurov, O., Mahmoudi, E., and Hedfi, A.
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ESCHERICHIA coli , *SCANNING electron microscopy , *INFRARED spectroscopy , *METAL-organic frameworks , *X-ray diffraction - Abstract
Due to their unique properties, metal-organic frameworks (MOF-2) have demonstrated significant potential for various biomedical applications. In this research, a manganese-Larginine framework (MOF-2) was synthesized and characterized using techniques such as X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The MOF-2's antibacterial activity against selected bacteria was evaluated via the agar-well diffusion method, and it was found to be more effective against E. coli than S. aureus. Furthermore, the MOF-2's potential as an antioxidant was investigated using the spectrophotometric method against ABTS and DPPH free radicals, with the MOF-2 displaying higher antioxidant activity against DPPH. The obtained results indicate that the synthesized MOF-2 possesses potent antibacterial and antioxidant activities, making it a promising candidate for various biomedical applications. [ABSTRACT FROM AUTHOR]
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- 2024
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6. Structural, bacteriostatic and antioxidant profiling of zinc oxide nanoparticles.
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Azeem, H., Rehman, S. U., Haq, S., Din, S. U., Elmnasri, Kh., Ali, M. Ben, Elhadef, Kh., Hedfi, A., Razzokov, J., and Mahmoudi, E.
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FREE radicals , *NANOPARTICLES , *BACTERIAL growth , *X-ray diffraction , *BACTERIAL diseases , *AGAR , *ZINC oxide - Abstract
The bacterial infection and generation of free radicals inside the body are serious threats to human health globally and researchers show their serious concern for these issues. Thus, in this study, an attempt has been made to control bacterial growth and scavenge the ABTs free radicals. ZnO-NPs were synthesized by an economical method, and the characteristics were investigated using a range of analytical techniques. These methods included FTIR, SEM, EDX, XRD, and TEM. The agar-well diffusion process has been followed to control the growth of selected bacteria and the ABTs free radicals have been scavenged using a standard protocol. The effect of the dose on both activities has been studied where the results has explore that the effectiveness of the ZnO-NPs gradually increases with increasing concentration. [ABSTRACT FROM AUTHOR]
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- 2024
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7. Postoperative Atrial Fibrillation: A Review.
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Shah S, Chahil V, Battisha A, Haq S, and Kalra DK
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Atrial fibrillation (AF) in the postoperative phase is a manifestation of numerous factors, including surgical stress, anesthetic effects, and underlying cardiovascular conditions. The resultant cardiac hyperactivity can induce new onset or exacerbate existing AF. A common phenomenon, postoperative atrial fibrillation (POAF) affects nearly 40% of patients and is associated with longer hospitalization stays, and increased mortality, heart failure, stroke, and healthcare costs. Areas of controversy in POAF include whether to anticoagulate patients who have short-lived POAF, especially given their higher bleeding risk in the postoperative period, and the identification of patients who would benefit the most from preventive drug therapy for POAF. This review discusses the pathophysiology and management of POAF, and strategies to reduce its occurrence.
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- 2024
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8. Ready-to-use abobotulinumtoxinA solution versus powder botulinumtoxinA for treatment of glabellar lines: Investigators' and subjects' experience in a Phase IV study.
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Chadha P, Gerber PA, Hilton S, Molina B, Haq S, Partridge J, Wong V, Hoffmann K, Persson C, and Prygova I
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- Humans, Female, Adult, Middle Aged, Neuromuscular Agents administration & dosage, Neuromuscular Agents adverse effects, Treatment Outcome, Cosmetic Techniques, Aged, Esthetics, Solutions, Botulinum Toxins, Type A administration & dosage, Botulinum Toxins, Type A adverse effects, Skin Aging drug effects, Powders, Patient Satisfaction, Forehead
- Abstract
Background: Botulinum neurotoxin type A (BoNT-A) is well-established for treatment of glabellar lines (GLs), and mostly formulated as powders requiring reconstitution for injection. The approved liquid formulation, ready-to-use (RTU) abobotulinumtoxinA was developed to ease injection procedures and prevent reconstitution errors. This multicenter, open-label, Phase IV study evaluated GL treatment experience using RTU abobotulinumtoxinA versus powder BoNT-A (onabotulinumtoxinA)., Methods: Females with experience of BoNT-A facial treatment were randomized 2:1 to GL treatment with 50 U RTU abobotulinumtoxinA (N = 99) or 20 U powder BoNT-A (N = 51) and followed-up for 6 months or 1 month, respectively. Assessments included: time to prepare each product for injection (primary endpoint); investigators' experience with product preparation/reconstitution; investigators' and subjects' treatment experience; safety; and for the RTU product: aesthetic improvement of GLs; subject satisfaction., Results: Compared with powder BoNT-A, RTU abobotulinumtoxinA required statistically significantly less preparation time (mean 0:33 vs. 1:34 min: s; p < 0.0001). Investigators preferred RTU abobotulinumtoxinA over powder BoNT-A (81% of treatment sessions) and found it allowed more time to communicate with subjects (97%). All investigators (100%) also found it easy-to-use, easy-to-learn, and that it fulfilled their expectations. Subjects found the RTU abobotulinumtoxinA treatment comfortable (91%), and through 6 months posttreatment, most reported satisfaction with their appearance (≥88%), looking natural (≥95%) and refreshed (≥80%). At Month 1, 99% of RTU-treated subjects had investigator-assessed improved aesthetic appearance in GLs, maintained in 76% at Month 6. No serious adverse events occurred., Conclusion: RTU abobotulinumtoxinA for GL treatment is well-tolerated, efficacious, shows high levels of subject satisfaction throughout 6 months, saves time, and is preferred by clinicians over powder BoNT-A., Gov Registry: NCT05277337., (© 2024 The Author(s). Journal of Cosmetic Dermatology published by Wiley Periodicals LLC.)
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- 2024
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9. Race disparities in emergency department utilization: Analyzing the role of value-based payment among Medicare Advantage beneficiaries.
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Canterberry M, Rastegar JS, Haq S, Sylwestrzak G, and Boudreau E
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- Humans, United States, Male, Female, Aged, Healthcare Disparities statistics & numerical data, Healthcare Disparities ethnology, Aged, 80 and over, Racial Groups statistics & numerical data, Emergency Service, Hospital statistics & numerical data, Medicare Part C statistics & numerical data
- Abstract
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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- 2024
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10. Accelerated discovery of perovskite solid solutions through automated materials synthesis and characterization.
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Omidvar M, Zhang H, Ihalage AA, Saunders TG, Giddens H, Forrester M, Haq S, and Hao Y
- Abstract
Accelerating perovskite solid solution discovery and sustainable synthesis is crucial for addressing challenges in wireless communication and biosensors. However, the vast array of chemical compositions and their dependence on factors such as crystal structure, and sintering temperature require time-consuming manual processes. To overcome these constraints, we introduce an automated materials discovery approach encompassing machine learning (ML) assisted material screening, robotic synthesis, and high-throughput characterization. Our proposed platform for rapid sintering and dielectric analysis streamlines the characterization of perovskites and the discovery of disordered materials. The setup has been successfully validated, demonstrating processing materials within minutes, in stark contrast to conventional procedures that can take hours or days. Following setup validation with established samples, we showcase synthesizing single-phase solid solutions within the barium family, such as (Ba
x Sr1-x )CeO3 , identified through ML-guided chemistry., (© 2024. The Author(s).)- Published
- 2024
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11. Hepatitis B Virus Infection in Eastern Libya: Current Efforts for Overcoming Regional Barriers for Its Elimination.
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Ismail F, Haq S, Hasan TS, Juoda D, Abdelsameea E, El-Garawani I, and Hathout HMR
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- Humans, Libya epidemiology, Male, Female, Retrospective Studies, Adult, Middle Aged, Young Adult, Adolescent, Hepatitis B epidemiology, Hepatitis B prevention & control, Disease Eradication organization & administration, Hepatitis B virus, Health Services Accessibility, Hepatitis B, Chronic epidemiology, Hepatitis B, Chronic prevention & control, Hepatitis B, Chronic therapy
- Abstract
Approximately 2.2% of Libyans have chronic hepatitis B (CHB) and are at the highest risk of developing end-stage disease complications. Several resource-limited countries, including Libya, may be far from achieving the WHO goal of hepatitis B elimination by 2030 as a result of several testing and linkage to care (LTC) barriers. In Libya, data about the current HBV infection situation is scarce. Therefore, our study aimed to evaluate the trends of HBV in eastern Libya, Tobruk region, and try to identify the region-specific gaps and barriers that could potentially delay the WHO goal of HBV elimination. An eighteen-year retrospective review of records of the main district medical center in the region was done to estimate the trends of HBV infection and qualitative interviews with the clinical staff of the CHB registry in the region were conducted to investigate the current status of HBV management. Out of 392,952 records, 371 (0.09%) HBV-positive were recorded and declining trends of the infection were noticed over the study period. Until late 2019, there was no linkage to care or follow-up for people with HBV infection. However, a CHB registry was established in late 2019 to manage HBV infections in the region, yet there are several barriers such as the lack of diagnostic infrastructure for liver function assessment and antiviral treatment. Despite the significant decline observed in the occurrence of HBV infection and introduction of important HBV management steps such as establishment of the CHB registry, there are still several barriers that could delay the elimination of the infection., (© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
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- 2024
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12. USP19 Negatively Regulates p53 and Promotes Cervical Cancer Progression.
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Tyagi A, Karapurkar JK, Colaco JC, Sarodaya N, Antao AM, Kaushal K, Haq S, Chandrasekaran AP, Das S, Singh V, Hong SH, Suresh B, Kim KS, and Ramakrishna S
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- Humans, Female, Cell Line, Tumor, Gene Expression Regulation, Neoplastic, Endopeptidases metabolism, Endopeptidases genetics, CRISPR-Cas Systems, HeLa Cells, Cell Proliferation, Uterine Cervical Neoplasms genetics, Uterine Cervical Neoplasms metabolism, Uterine Cervical Neoplasms pathology, Tumor Suppressor Protein p53 metabolism, Tumor Suppressor Protein p53 genetics, Ubiquitination, Cell Movement, Disease Progression
- Abstract
p53 is a tumor suppressor gene activated in response to cellular stressors that inhibits cell cycle progression and induces pro-apoptotic signaling. The protein level of p53 is well balanced by the action of several E3 ligases and deubiquitinating enzymes (DUBs). Several DUBs have been reported to negatively regulate and promote p53 degradation in tumors. In this study, we identified USP19 as a negative regulator of p53 protein level. We demonstrate a direct interaction between USP19 and p53 by pull down assay. The overexpression of USP19 promoted ubiquitination of p53 and reduced its protein half-life. We also demonstrate that CRISPR/Cas9-mediated knockout of USP19 in cervical cancer cells elevates p53 protein levels, resulting in reduced colony formation, cell migration, and cell invasion. Overall, our results indicate that USP19 negatively regulates p53 protein levels in cervical cancer progression., (© 2023. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
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- 2024
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13. Remarkable enhancement of the nonlinear optical behavior towards asymmetric substituted D-π-A dithiophene-based compounds.
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Haq S, Tariq A, Naz S, Abid S, Akhtar MN, Bullo S, Alhokbany N, and Ahmed S
- Abstract
Context: Nonlinear optics (NLO) is an interesting field that discloses the interaction between intense light and matter, leading to a deeper understanding of NLO phenomena. Organic chromophores are considered as promising materials for NLO due to their exceptional structural versatility, ease of processing, and rapid response to NLO effects. Functional materials based on thiophene have been indispensable in advancing organic optoelectronics. Specifically, dithiophene-based compounds display weaker aromaticity, reduced steric hindrance, and additional sulfur-sulfur interactions. Hence, by utilizing dithieno[2,3-d:2',3'-d']benzo[1,2-b:4,5-b']dithiophene (DTBDT) as the core structure, designing of a set of organic compounds with D1-π-D2-π-A-type framework, namely ZR1D1-ZR1D8, was carried out in this study. The analysis of frontier molecular orbitals (FMOs) revealed that compound ZR1D2 has the lowest band gap of 1.922 eV among all the investigated chromophores. The correlation of global reactivity parameters (GRPs) with the band gap values indicates that ZR1D2 displays a hardness of 0.961 eV and a softness of 0.520 eV
-1 . Among the studied compounds, ZR1D2 demonstrated a broad absorption spectrum that extended across the visible region. The maximum absorption wavelengths were observed at 766.470 nm for ZR1D2 and 749.783 nm for ZR1D5. These DTBDT-based dyes exhibit a remarkable NLO response with exceptionally high first hyperpolarizability (βtot ) values. Among them, compound ZR1D2 stands out with the highest average linear polarizability (⟨α⟩ = 3.0 × 10-22 esu), first hyperpolarizability (βtot = 4.1 × 10-27 esu), and second hyperpolarizability (γtot = 7.5 × 10-32 esu) values. In summary, this investigation offers valuable insights into the potential use of DTBDT-based organic chromophores, particularly ZR1D2, for advanced applications in NLO. These findings suggest promising opportunities for researchers to synthesize these molecules and utilize these compounds in hi-tech NLO-based applications., Methodology: The density functional theory computations were performed at the M06/6-311G(d,p) functional to explore their structural effects on electronic and NLO findings. Various analyses like highest occupied molecular orbital-lowest unoccupied molecular orbital energy gaps, absorption maxima, density of states, open circuit voltage, binding energies of electrons and holes, and transition density matrix are employed to investigate photovoltaic efficiencies of the derivatives. Different software packages like Avogadro, Multiwfn, Origin, GaussSum, PyMOlyze, and Chemcraft were used to deduce conclusions from the output files., (© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)- Published
- 2024
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14. Rocephin-graphene oxide-silver nanocomposites: A versatile platform for biomedical applications.
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Kashif H, Ahmed MN, Altaf M, Haq IU, Iqbal A, and Haq S
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- Animals, Humans, Artemia drug effects, X-Ray Diffraction, Spectroscopy, Fourier Transform Infrared, Antioxidants pharmacology, Antioxidants chemistry, Anti-Bacterial Agents pharmacology, Microscopy, Electron, Scanning, Musa chemistry, Anti-Infective Agents pharmacology, Graphite chemistry, Silver chemistry, Silver pharmacology, Nanocomposites chemistry, Metal Nanoparticles chemistry
- Abstract
For many years, the synthesis of graphene oxide (GO) had involved exfoliating graphite flakes, and the methods applied were expensive and time-consuming. Thus, an attempt had been made to create an inventive, less expensive method for the synthesis of GO using unrefined, raw carbon-containing material. Modified Hummer's method was used to prepare GO from banana peel. In addition, the metallic silver nanocomposite was also synthesized along with laoding of drug Rocephin where they interact with each other through electrostatic hydrogen bond interaction. The degree of crystallinity and the crystallite size were through x-ray diffraction (XRD) analysis and the crystallite size of AgNPs was found to be 40.40 nm. The scanning electron microscopy (SEM) analysis shows that the morphology of the GO gradually changes with the addition of AgNPs and Rocephin. A blue shift was seen in the absorbance maxima of the raw carbon upon the conjugation of Rocephin in UV analysis. The Fourier-transform infrared spectroscopy, and energy dispersive X-ray (EDX) spectroscopy were used to determine the chemical composition of the samples. Furthermore, a broad biological screening of the synthesized samples had been carried out following the total reducing power (TRP), total antioxidant capacity (TAC), antibacterial, antifungal, MTT (Cytotoxicity of biologically synthesized silver nanoparticles in MDA-MB-231 human breast cancer cells) cell viability, brine shrimp lethality, and hemolytic protocols. Significant results were obtained, and the Rocephin-GO-AgNPs had depicted promising activity as compared with their counterparts. RESEARCH HIGHLIGHTS: The GO was prepared from the raw carbon extracted from banana peels and was used as a substrate for the synthesis Graphene oxide silver nanoparticles (GO-AgNPs) and Rocephin-loaded graphene oxide silver nanoparticles (Rocephin-GO-AgNPs) The structural and compositional analysis of the nanomaterial was carried out, and they were screened for several biomedical applications. The Rocephin-GO-AgNPs exhibit the highest activity as compared with their counterparts., (© 2024 Wiley Periodicals LLC.)
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- 2024
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15. A first principles based prediction of electronic and nonlinear optical properties towards cyclopenta thiophene chromophores with benzothiophene acceptor moieties.
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Haq S, Khalid M, Hussain A, Haroon M, and Alshehri SM
- Abstract
In the current work, organic cyclopenta-thiophene (CPT) based derivatives (FICR and FICD1-FICD5) were designed by the modulation of end-capped acceptor group of the reference molecule i.e., FICR, to explore their nonlinear optical (NLO) response. The effect of terminal acceptor and donor groups in the tailored compounds was explored by using DFT based quantum calculations. The UV-Vis analysis, frontier molecular orbitals (FMOs), transition density matrix (TDM), natural bond orbitals (NBOs), density of states (DOS), nonlinear optical (NLO) analyses were performed at M06/6-311G(d,p) functional. The LUMO-HOMO band gaps of FICD1-FICD5 were found to be smaller (1.75-1.92 eV) comparative to FICR (1.98 eV). Moreover, the global reactivity parameters (GRPs) were correlated with the results of other analyses. FICD2 and FICD5 with lowest band gap 1.73 and 1.75 eV showed less hardness (0.86 and 0.87 eV, respectively), high softness (0.58 and 0.57 eV
-1 ), and larger absorption spectrum (815 and 813 nm) in gaseous phase and (889 and 880 nm) in solvent phase among all entitled compounds. All the designed chromophores (FICD1-FICD5) demonstrated a significant NLO response as compared to FICR. Particularly, FICD2 and FICD5 exhibited the highest average linear polarizability (<α>) [2.86 × 10-22 and 2.88 × 10-22 esu], first hyperpolarizability (βtot ) (8.43 × 10-27 and 8.35 × 10-27 esu) and second hyperpolarizability (γtot ) (13.20 × 10-32 and 13.0 × 10-32 esu) values as compared to the other derivatives. In nutshell, structural modeling of CPT based chromophores with extended acceptors, can be significantly utilized to achieve potential NLO materials., (© 2024. The Author(s).)- Published
- 2024
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16. Synthesis, characterization, and anti-inflammatory activity of tetrahydropiperine, piperic acid, and tetrahydropiperic acid via down regulation of NF-κB pathway.
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Kumar D, Rahman Sarkar A, Iqbal Andrabi N, Assim Haq S, Ahmed M, Kumar Shukla S, Ahmed Z, and Rai R
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- Mice, Animals, Down-Regulation, Anti-Inflammatory Agents therapeutic use, Cytokines metabolism, Nitric Oxide metabolism, RAW 264.7 Cells, Edema chemically induced, Edema drug therapy, NF-kappa B metabolism, Lipopolysaccharides adverse effects, Fatty Acids, Unsaturated
- Abstract
The present study describes the synthesis, characterization, and evaluation of tetrahydropiperine (THP), piperic acid (PA), and tetrahydropiperic acid (THPA) as anti-inflammatory agents. THPA demonstrated potent anti-inflammatory activity among all the compounds. The anti-inflammatory potential was investigated in both in-vitro and in-vivo experimental models. Our findings demonstrated that THPA effectively suppressed the production of pro-inflammatory mediators, including nitric oxide and pro-inflammatory cytokines (TNF-α, IL-6, and IL-1β) in both in vitro and in vivo. Additionally, THPA attenuated the expression of i-NOS and COX-2 in RAW 264.7 macrophages. The oral administration of THPA significantly reduced carrageenan induced paw edema thickness and alleviated liver, lung, and kidney injury induced by LPS. THPA also reduced the infiltration of inflammatory cells, prevented the occurrence of significant lesions, and mitigated tissue damage. Moreover, THPA significantly improved the survival rate of mice challenged with LPS. Our western blot studies also found that LPS induced NF-κB activation was downregulated by treatment with THPA in an in vivo system. These results collectively illustrated the potential of THPA as a therapeutic agent for treating inflammatory diseases., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)
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- 2024
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17. Influence of benzothiophene acceptor moieties on the non-linear optical properties of pyreno-based chromophores: first-principles DFT framework.
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Shafiq I, Haq S, Javed T, Bullo S, Ahmed S, Alhokbany N, and Ahamad T
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Herein, a series of heterocyclic organic compounds (PYFD1-PYFD7) are designed with different acceptor moieties at the terminal position of a reference compound (PYFR) for nonlinear optical (NLO) active materials. The optoelectronic characteristics of the designed chromophores were investigated using density functional theory (DFT) calculations with the M06/6-311G(d,p) functional. Frontier molecular orbital (FMO) analysis revealed a significant decrease in the energy of the band gaps (2.340-2.602 eV) for the derivatives as compared to the PYFR reference compound (3.12 eV). An efficient transfer of charge from the highest occupied molecular orbital (HOMO) to the lowest unoccupied molecular orbital (LUMO) was seen, which was further corroborated by the density of states (DOS) and transition density matrix (TDM) heat maps. The results of the global reactivity parameters (GRPs) indicated that all derivatives exhibited greater softness ( σ = 0.384-0.427 eV) and lower hardness ( η = 0.394-1.302 eV) as compared to PYFR, indicating a higher level of polarizability in the derivatives. Moreover, all of the derivatives showed significant findings in terms of nonlinear optical (NLO) results as compared to the reference chromophore. PYFD2 showed the most effective NLO response ( α = 1.861 × 10
-22 and βtot = 2.376 × 10-28 esu), including a lowered band gap of 2.340 eV, the maximum softness value of 0.4273 eV, and the lowest hardness value of 1.170 eV as compared to other chromophores. The incorporation of different acceptors and thiophene as a π-spacer in this structural alteration significantly contributed to achieving remarkable NLO responses. Therefore, our findings may motivate experimentalists to synthesize these designed NLO active materials for the current advanced technological applications., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)- Published
- 2024
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18. Effect of calcination temperature induced structural modifications on the photocatalytic efficacy of Fe 2 O 3 -ZrO 2 nanostructures: mechanochemical synthesis.
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Zain M, Yasin KA, Haq S, Rehman W, Din SU, Shujaat S, Syed A, Hossain MK, Paray BA, Razzokov J, and Samad A
- Abstract
Water contamination due to organic pollutants is a challenging issue around the globe, and several attempts have been made to deal with this issue. Out of which, the semiconductor-based photocatalytic process had gained much attention and proved to be an efficient, easy, and economical process for the removal of organic dyes from aqueous solutions. For this purpose, the iron oxide-zirconium dioxide nanocomposite (Fe
2 O3 -ZrO2 NC) was prepared via a simple mechanochemical process using a mortar and pestle, followed by a calcination process at 300, 600, and 900 °C. Different physicochemical analyses were carried out in order to investigate the successful synthesis of Fe2 O3 -ZrO2 NC and the effect of temperature on the crystallinity, surface area, pore size, phase composition, sample morphology, and particle/crystallite size. The Fe2 O3 -ZrO2 NCs were subjected to a photocatalytic test under solar light irradiation against fluorescein dye in an aqueous medium, and the photocatalytic performance was examined under the influence of calcination temperatures, pH, catalyst dose, and initial concentration. The stability of the Fe2 O3 -ZrO2 NCs was also checked by recycling them for five reuse cycles., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)- Published
- 2024
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19. Imaging spectrum of horseshoe lung: A series of four cases.
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Yadav V, Anand R, Abbey P, and Haq S
- Abstract
Horseshoe lung (HL) is a rare congenital anomaly represented by the fusion of both lungs, posterior to the heart, and is typically associated with various bronchopulmonary and cardiovascular malformations. Multi-detector contrast enhanced CT is the imaging modality of choice to demonstrate the pathology and associated malformations. There has been inconsistency in the nomenclature used for such cases in literature. To resolve ambiguity, the authors emphasise that only two terms: HL and pseudo-HL be used on imaging to describe variants of this congenital malformation., Contribution: A description of the imaging features in four cases of HL, with their associated malformations and a review of the nomenclature., Competing Interests: The authors declare that they have no financial or personal relationships that may have inappropriately influenced them in writing this article., (© 2024. The Authors.)
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- 2024
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20. National study on the risks of COVID-19 infection for paediatric kidney transplant recipients: a retrospective, cross-sectional study.
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Withers C, Patel R, Reynolds BC, Christian M, Muorah M, Tse Y, Edwards L, Yadav P, Haq S, Hegde S, Callaghan CJ, Bamford A, and Marks SD
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- Child, Humans, Cross-Sectional Studies, Pandemics, Retrospective Studies, RNA, SARS-CoV-2, Acute Kidney Injury, COVID-19 epidemiology, Kidney Transplantation adverse effects
- Abstract
Introduction: During the COVID-19 pandemic, evidence emerged that immunosuppressed children were less affected by COVID-19 infections compared with immunosuppressed adults. The aim of our study was to investigate how COVID-19 infections affected paediatric kidney transplant recipients (pKTR) in the UK., Methods: Questionnaires regarding COVID-19 infection data and care of pKTR during the COVID-19 pandemic were sent to all 13 UK paediatric nephrology centres examining asymptomatic and symptomatic pKTR with positive COVID-19 PCR testing from 1 April 2020 to 1 December 2021., Results: 63 pKTR who were 3.1 (range 0.1-15) years post-transplantation had COVID-19 infection with positive SARS-CoV-2 PCR RNA. Classical COVID-19 symptoms were present in half of the patients; with atypical presentations including diarrhoea (13%) and lethargy (13%) also noted, while a third of patients were asymptomatic. Eighteen patients (28%) were hospitalised including five asymptomatic patients admitted for other reasons. No patients needed ventilation or intensive care admission, and one patient received supplemental oxygen. There was evidence of acute kidney injury (AKI) in 71% of patients, but no patients needed kidney replacement therapy with haemofiltration or dialysis., Conclusion: We report 10.4% of the UK paediatric renal transplantation population had documented COVID-19 infections with positive SARS-CoV-2 PCR RNA with 28% of those affected requiring hospitalisation. The increased incidence of AKI, particularly after the first wave of the COVID-19 pandemic, was possibly due to increased testing. There was low morbidity and mortality compared with the adult population., Competing Interests: Competing interests: SDM had unpaid roles during COVID-19 pandemic with national COVID-19 working groups of the UK Kidney Association, UK Renal Registry, The British Association for Paediatric Nephrology, National Health Service Blood and Transplant and National Institute for Health and Care Research., (© Author(s) (or their employer(s)) 2024. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2024
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21. Tailoring graphene-oxide and reduced-graphene-oxide with NaNO 3 and CaCl 2 catalysts with enhanced photo-catalytic degradation of methylene blue dye.
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Chitkara M, Goyal N, Kumar A, Marasamy L, Haq S, Aldossari SA, Haldhar R, and Hossain MK
- Abstract
This study employed various experimental techniques to produce graphene oxide (GO) under different conditions, such as the inclusion or exclusion of NaNO
3 , and reduced graphene oxide (RGO) with or without the catalyst CaCl2 . The procedure of decreasing RGO was carried out using the reducing agent NaBH4 . Moreover, the prepared mixtures were utilized in the degradation process of methylene blue (MB) dye using photo-catalysis, with exposure to both ultraviolet (UV) light and sunlight. When exposed to UV and sunlight irradiation, WN-GO showed rapid and ecologically friendly breakdown of MB dye in comparison to N-GO. WN-GO exhibited exceptional adsorption capabilities, surpassing other tested materials like N-GO, WN-C-RGO and C-RGO. Although WN-C-RGO has demonstrated satisfactory performance in terms of photo-catalytic degradation, as the concentration-time graph of the MB dye revealed significant degradation, with a reduction of up to 90% and 62.5% under UV light and sunlight exposure, respectively. These results offer insightful information on the potential of graphene-based materials to address other environmental issues, particularly in the areas of water treatment., Competing Interests: The authors hereby declare that we have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (This journal is © The Royal Society of Chemistry.)- Published
- 2024
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22. Sustained release polymer and surfactant based solid dispersion of andrographolide exhibited improved solubility, dissolution, pharmacokinetics, and pharmacological activity.
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Assim Haq S, Paudwal G, Banjare N, Iqbal Andrabi N, Wazir P, Nandi U, Ahmed Z, and Gupta PN
- Subjects
- Rats, Humans, Animals, Solubility, Rats, Wistar, Delayed-Action Preparations, Caco-2 Cells, Carrageenan, X-Ray Diffraction, Poloxamer, Edema, Calorimetry, Differential Scanning, Spectroscopy, Fourier Transform Infrared methods, Polymers, Surface-Active Agents, Diterpenes
- Abstract
Andrographolide (AD) is a potent natural product with a wide range of pharmacological activities. However, it has low oral bioavailability due to poor solubility and dissolution rate. Solid dispersion (SD) is a promising technique to improve the solubility and dissolution rate of such molecules. In this study, SD formulation of AD was prepared using Kollidon-SR (KSR) and Poloxamer-407 (P-407) as carriers. SD was prepared using the solvent evaporation method and evaluated for the modulation of solubility of AD. The developed SD formulation was characterized using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), powder X-ray diffraction (PXRD), and Fourier transform infrared spectroscopy (FTIR). Further, dissolution rate, yield, drug content, stability, flowability, and pharmacokinetic profile of SD were evaluated. The compatibility of SD with the Caco-2 cells and its impact on the P-glycoprotein (P-gp) mediated efflux was also investigated. Furthermore, carrageenan-induced paw edema, and adjuvant-induced arthritic model were used to evaluate the efficacy of SD. The results showed that SD
3 (AD + KSR + P-407, 1:6:8) exhibited the highest solubility and dissolution rate, and significantly improved pharmacokinetic profile compared to native AD. SD3 was found to be stable during storage and displayed excellent yield, drug content, and flowability. This formulation was found to be compatible with the Caco-2 cells and retarded the efflux of P-gp substrate. SD3 also demonstrated substantially better efficacy than native AD in terms of paw edema inhibition (carrageenan-induced paw edema, Wistar rats), and overall improvement of disease condition (in terms of paw edema, arthritic score, AST, ALT, cytokines, radiological changes, and histopathology) in arthritic Wistar rats. In conclusion, SD3 exhibited improved solubility, dissolution rate, pharmacokinetic profile, and pharmacological activity than native AD., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Prem N. Gupta reports a relationship (that includes employment) with Council of Scientific and Industrial Research (CSIR)., (Copyright © 2024 Elsevier B.V. All rights reserved.)- Published
- 2024
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23. Synthesis, characterization and NLO properties of 1,4-phenylenediamine-based Schiff bases: a combined theoretical and experimental approach.
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Tahir M, Aftab H, Shafiq I, Khalid M, Haq S, El-Kott AF, Zein MA, Hani U, and Shafiq Z
- Abstract
In the current study, three novel 1,4-phenylenediamine-based chromophores (3a-3c) were synthesized and characterized and then their nonlinear optical (NLO) characteristics were explored theoretically. The characterization was done by spectroscopic analysis, i.e. FT-IR, UV-Visible, and NMR spectroscopy, and elemental analysis. Notably, these chromophores exhibited UV-Visible absorption within the range of 378.635-384.757 nm in acetonitrile solvent. Additionally, the FMO findings for 3a-3c revealed the narrowest band gap (4.129 eV) for 3c. The GRPs for these chromophores were derived from HOMO-LUMO energy values, which showed correspondence with FMO results by depicting a minimum hardness (2.065 eV) for 3c. Among these compounds, 3c displayed the highest nonlinear behavior with maximum μ
tot , βtot and γtot values of 4.79 D, 8.00 × 10-30 and 8.13 × 10-34 a.u., respectively. Our findings disclosed that the synthesized 1,4-phenylenediamine chromophores may be considered promising candidates for nonlinear optical materials, showing potential applications in the realm of optoelectronic devices., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)- Published
- 2024
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24. Plasma Cell-Free Tumor Methylome as a Biomarker in Solid Tumors: Biology and Applications.
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Sacdalan DB, Ul Haq S, and Lok BH
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- Humans, Epigenome, Prospective Studies, Biomarkers, Biology, Neoplasms genetics, Cell-Free Nucleic Acids
- Abstract
DNA methylation is a fundamental mechanism of epigenetic control in cells and its dysregulation is strongly implicated in cancer development. Cancers possess an extensively hypomethylated genome with focal regions of hypermethylation at CPG islands. Due to the highly conserved nature of cancer-specific methylation, its detection in cell-free DNA in plasma using liquid biopsies constitutes an area of interest in biomarker research. The advent of next-generation sequencing and newer computational technologies have allowed for the development of diagnostic and prognostic biomarkers that utilize methylation profiling to diagnose disease and stratify risk. Methylome-based predictive biomarkers can determine the response to anti-cancer therapy. An additional emerging application of these biomarkers is in minimal residual disease monitoring. Several key challenges need to be addressed before cfDNA-based methylation biomarkers become fully integrated into practice. The first relates to the biology and stability of cfDNA. The second concerns the clinical validity and generalizability of methylation-based assays, many of which are cancer type-specific. The third involves their practicability, which is a stumbling block for translating technologies from bench to clinic. Future work on developing pan-cancer assays with their respective validities confirmed using well-designed, prospective clinical trials is crucial in pushing for the greater use of these tools in oncology.
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- 2024
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25. Site-selective synthesis and pharmacological elucidation of novel semi-synthetic analogues of koenimbine as a potential anti-inflammatory agent.
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Iqbal Andrabi N, Sarkar AR, Assim Haq S, Kumar D, Kour D, Saroch D, Kumar Shukla S, Kumar A, Bhagat A, Ali A, Kour G, and Ahmed Z
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- Mice, Animals, Interleukin-6 metabolism, Lipopolysaccharides, Mice, Inbred BALB C, Anti-Inflammatory Agents pharmacology, Anti-Inflammatory Agents therapeutic use, Carbazoles, RAW 264.7 Cells, Cyclooxygenase 2 metabolism, Nitric Oxide Synthase Type II metabolism, Nitric Oxide metabolism, NF-kappa B metabolism, Tumor Necrosis Factor-alpha metabolism
- Abstract
Koenimbine (1), a carbazole alkaloid isolated from Murraya koenigii, belongs to the Rutaceae family. Various pharmacological effects such as anti-diabetic, melanogenesis inhibition, anti-diarrheal, anti-cancer, and anti-inflammatory properties of koenimbine have already been reported. In the current study, we investigated the anti-inflammatory role of koenimbine (1) and its novel semi-synthetic derivative 8-methoxy-3,3,5-trimethylpyrano[3,2-a] carbazole-11(3H)-yl) (3-(trifluoromethyl) phenyl) methanone (1G) in both in vitro and in vivo biological systems. Our results demonstrated that the anti-inflammatory activity of 1G significantly lowered the production of NO, pro-inflammatory cytokines (IL-6, TNF-α & IL-1β), LTB4 following LPS stimulation in RAW 264.7 macrophages. Furthermore, 1G significantly attenuated the expression levels of nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) in a dose dependent manner and also decreased the production of reactive oxygen species (ROS) in LPS-activated RAW 264.7 cells. In addition, the oral administration of 1G reduced the inflammatory response in carrageenan-induced paw edema in BALB/C mice. Moreover, it effectively reduced NO, IL-6, IL-1β & TNF-α levels, liver markers (AST, ALT), and kidney markers (BUN, CRE, and Urea). Also, 1G reverted the infiltration of inflammatory cells and tissue damage in lungs, liver and kidney enhanced the survival rate in LPS-challenged mice. 1G blocks NF-κB p65 from translocating into the nucleus and activating inflammatory gene transcription. These results illustrated that 1G suppresses the inflammatory effects both in-vitro and in-vivo studies via downregulating the nuclear factor kappa-B (NF-κB) signaling pathway. In conclusion, our results demonstrate that semi-synthetic derivative 1G can effectively attenuate the inflammatory response via NF-κB and MAPK signaling pathways; suggesting 1G is a potential novel anti-inflammatory drug candidate in treating inflammatory disorders., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023. Published by Elsevier B.V.)
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- 2024
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26. Synthesis, anti-diabetic profiling and molecular docking studies of 2-(2-arylidenehydrazinyl)thiazol-4(5 H )-ones.
- Author
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Mehmood H, Haroon M, Akhtar T, Woodward S, Haq S, and M Alshehri S
- Subjects
- Antioxidants pharmacology, Antioxidants chemistry, Antioxidants chemical synthesis, Humans, Structure-Activity Relationship, Molecular Structure, Hypoglycemic Agents chemistry, Hypoglycemic Agents pharmacology, Hypoglycemic Agents chemical synthesis, Molecular Docking Simulation, Thiazoles chemistry, Thiazoles pharmacology, Thiazoles chemical synthesis, alpha-Amylases antagonists & inhibitors, alpha-Amylases metabolism
- Abstract
Aim: To synthesize novel more potent anti-diabetic agents. Methodology: A simple cost effective Hantzsch's synthetic strategy was used to synthesize 2-(2-arylidenehydrazinyl)thiazol-4(5 H )-ones. Results: Fifteen new 2-(2-arylidenehydrazinyl)thiazol-4(5 H )-ones were established to check their anti-diabetic potential. From alpha(α)-amylase inhibition, anti-glycation and anti-oxidant activities it is revealed that most of the compounds possess good anti-diabetic potential. All tested compounds were found to be more potent anti-diabetic agents via anti-glycation mode. The results of α-amylase and anti-oxidant inhibition revealed that compounds are less active against α-amylase and anti-oxidant assays. Conclusion: This study concludes that introduction of various electron withdrawing groups at the aryl ring and substitution of different functionalities around thiazolone nucleus could help to find out better anti-diabetic drug.
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- 2024
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