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Igbokwe CJ, Feng Y, Louis H, Benjamin I, Quaisie J, Duan Y, Tuly JA, Cai M, Zhang H. Novel antioxidant peptides identified from coix seed by molecular docking, quantum chemical calculations and invitro study in HepG2 cells. Food Chem 2024; 440:138234. [PMID: 38145582 DOI: 10.1016/j.foodchem.2023.138234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/11/2023] [Accepted: 12/17/2023] [Indexed: 12/27/2023]
Abstract
The aim of the study was to identify potent antioxidant peptides sourced from coix seed, analyze the structure-activity relationship through molecular docking and quantum chemical calculation. Molecular docking results showed that among thirteen peptides selected in silico, eight had favourable binding interaction with the Keap1-Kelch domain (2FLU). Promising peptides with significant binding scores were further evaluated using quantum calculation. It was shown that peptide FFDR exhibited exceptional stability, with a high energy gap of 5.24 eV and low Highest Occupied Molecular Orbitals (HOMO) and Lowest Unoccupied Molecular Orbitals (LUMO) values. Furthermore, FFDR displayed the capacity to enhance the expression of Nrf2-Keap1 antioxidant genes (CAT, SOD, GSH-Px) and improved cellular redox balance by increasing reduced glutathione (GSH) while reducing oxidized glutathione (GSSG) and malonaldehyde (MDA) levels. These findings highlight the potential of coix seed peptides in developing novel, effective and stable antioxidant-based functional foods.
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Affiliation(s)
- Chidimma Juliet Igbokwe
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China; Department of Food Science and Technology, University of Nigeria Nsukka, Nigeria
| | - Yuqin Feng
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria; School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Janet Quaisie
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China; Chemistry and Nutrition Research Division, Food Research Institute, Accra, Ghana
| | - Yuqing Duan
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China; Institute of Food Physical Processing, Jiangsu University, Zhenjiang 212013, China.
| | - Jamila A Tuly
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Meihong Cai
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Haihua Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China.
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2
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Amodu IO, Olaojotule FA, Ogbogu MN, Olaiya OA, Benjamin I, Adeyinka AS, Louis H. Adsorption and sensor performance of transition metal-decorated zirconium-doped silicon carbide nanotubes for NO 2 gas application: a computational insight. RSC Adv 2024; 14:5351-5369. [PMID: 38348297 PMCID: PMC10859909 DOI: 10.1039/d3ra08796d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Accepted: 01/24/2024] [Indexed: 02/15/2024] Open
Abstract
Owing to the fact that the detection limit of already existing sensor-devices is below 100% efficiency, the use of 3D nanomaterials as detectors and sensors for various pollutants has attracted interest from researchers in this field. Therefore, the sensing potentials of bare and the impact of Cu-group transition metal (Cu, Ag, Au)-functionalized silicon carbide nanotube (SiCNT) nanostructured surfaces were examined towards the efficient detection of NO2 gas in the atmosphere. All computational calculations were carried out using the density functional theory (DFT) electronic structure method at the B3LYP-D3(BJ)/def2svp level of theory. The mechanistic results showed that the Cu-functionalized silicon carbide nanotube surface possesses the greatest adsorption energies of -3.780 and -2.925 eV, corresponding to the adsorption at the o-site and n-site, respectively. Furthermore, the lowest energy gap of 2.095 eV for the Cu-functionalized surface indicates that adsorption at the o-site is the most stable. The stability of both adsorption sites on the Cu-functionalized surface was attributed to the small ellipticity (ε) values obtained. Sensor mechanisms confirmed that among the surfaces, the Cu-functionalized surface exhibited the best sensing properties, including sensitivity, conductivity, and enhanced adsorption capacity. Hence, the Cu-functionalized SiCNT can be considered a promising choice as a gas sensor material.
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Affiliation(s)
- Ismail O Amodu
- Computational and Bio-Simulation Research Group, University of Calabar Calabar Nigeria
- Department of Mathematics, University of Calabar Calabar Nigeria
| | - Faith A Olaojotule
- Computational and Bio-Simulation Research Group, University of Calabar Calabar Nigeria
| | - Miracle N Ogbogu
- Computational and Bio-Simulation Research Group, University of Calabar Calabar Nigeria
| | | | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar Calabar Nigeria
- Department of Research Analytics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University Chennai India
| | - Adedapo S Adeyinka
- Department of Chemical Sciences, University of Johannesburg Pretoria South Africa
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar Calabar Nigeria
- School of Chemistry, University of Leeds Leeds LS2 9JT UK
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3
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Ling L, Louis H, Isang BB, Emori W, Benjamin I, Ahuekwe EF, Cheng CR, Manicum ALE. Inflammatory Studies of Dehydroandrographolide: Isolation, Spectroscopy, Biological Activity, and Theoretical Modeling. Appl Biochem Biotechnol 2024; 196:417-435. [PMID: 37140782 DOI: 10.1007/s12010-023-04566-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/26/2023] [Indexed: 05/05/2023]
Abstract
Dehydroandrographolide (DA) was isolated and experimentally characterized utilizing FT-IR, UV-Vis, and NMR spectroscopy techniques along with detailed theoretical modelled at the DFT/B3LYP-D3BJ/6-311 + + G(d,p) level of theory. Substantially, molecular electronic property investigations in the gaseous phase alongside five different solvents (ethanol, methanol, water, acetonitrile and DMSO) were comprehensively reported and compared with the experimental results. The globally harmonized scale (GHS), which is used to identify and label chemicals, was also utilized to demonstrate that the lead compound predicted an LD50 of 1190 mg/kg. This finding implies that consumers can safely consume the lead molecule. Notable impacts on hepatotoxicity, cytotoxicity, mutagenicity, and carcinogenicity were likewise found to be minimal to nonexistent for the compound. Additionally, in order to account for the biological performance of the studied compound, in-silico molecular docking simulation analysis was examined against different anti-inflammatory target of enzymes (3PGH, 4COX, and 6COX). From the examination, it can be inferred that DA@3PGH, DA@4COX, and DA@6COX, respectively, showed significant negative binding affinities of -7.2 kcal/mol, -8.0 kcal/mol, and - 6.9 kcal/mol. Thus, the high mean binding affinity in contrast to conventional drugs further reinforces these results as an anti-inflammatory agent.
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Affiliation(s)
- Liu Ling
- School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, 643000, Sichuan, PR China
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria.
| | - Bartholomew B Isang
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Wilfred Emori
- School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, 643000, Sichuan, PR China.
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Microbiology, Faculty of Biological Sciences, University of Calabar, Calabar, Nigeria
| | - Eze F Ahuekwe
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria.
- Department of Biological Sciences, Covenant University, Ota, Nigeria.
| | - Chun-Ru Cheng
- College of Chemical Engineering, Institute of Pharmaceutical Engineering Technology and Application, Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, Sichuan University of Science & Engineering, Zigong, 643000, Sichuan, PR China
| | - Amanda-Lee E Manicum
- Department of Chemical sciences, University of Johannesburg, Gauteng, South Africa
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Nelson FA, Louis H, Benjamin I, A Timothy R. The iron group transition-metal (Fe, Ru, Os) coordination of Se-doped graphitic carbon (Se@g-C 3N 4) nanostructures for the smart therapeutic delivery of zidovudine (ZVD) as an antiretroviral drug: a theoretical calculation perspective. RSC Adv 2023; 13:34078-34096. [PMID: 38020013 PMCID: PMC10660211 DOI: 10.1039/d3ra06885d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 11/03/2023] [Indexed: 12/01/2023] Open
Abstract
This study employed density functional theory (DFT) computational techniques at the ωB97XD/def2svp level of theory to comprehensively explore the electronic behavior of Fe-group transition metal (Fe, Ru, Os) coordination of Se-doped graphitic carbon (Se@g-C3N4) nanosystems in the smart delivery of zidovudine (ZVD), an antiretroviral drug. The HOMO-LUMO results of the interactions show a general reduction in energy gap values across all complexes in the following order: ZVD_Se@C3N4 < ZVD_Ru_Se@C3N4 < ZVD_Fe_Se@C3N4 < ZVD_Os_Se@C3N4. ZVD_Se@C3N4 exhibits the smallest post-interaction band gap of 3.783 eV, while ZVD_Os_Se@C3N4 presents the highest energy band gap of 5.438 eV. Results from the corrected adsorption energy (BSSE) revealed that Os_Se@C3N4 and Ru_Se@C3N4 demonstrated more negative adsorption energies of -2.67 and -2.701 eV, respectively, pointing to a more favorable interaction between ZVD and these systems, thus potentially enhancing the drug delivery efficiency. The investigation into the drug release mechanism from the adsorbents involved a comprehensive examination of the dipole moment and the influence of pH, shedding light on the controlled release of ZVD. Additionally, investigating the energy decomposition analysis (EDA) revealed that ZVD_Ru_Se@C3N4 and ZVD_Fe_Se@C3N4 exhibited the same total energy of -787.7 kJ mol-1. This intriguing similarity in their total energy levels suggested that their stability was governed by factors beyond reactivity, possibly due to intricate orbital interactions. Furthermore, analyzing the bond dissociation energies showed that all systems exhibited negative enthalpy values, indicating that these systems were exothermic at both surface and interaction levels, thus suggesting that these processes emitted heat, contributing to the surrounding thermal energy.
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Affiliation(s)
- Favour A Nelson
- Computational and Bio-simulation Research Group, University of Calabar Calabar Nigeria
- Department of Pure and Applied Chemistry, University of Calabar Calabar Nigeria
| | - Hitler Louis
- Computational and Bio-simulation Research Group, University of Calabar Calabar Nigeria
- Department of Pure and Applied Chemistry, University of Calabar Calabar Nigeria
- Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education Kelambakkam 603103 Tamil Nadu India
| | - Innocent Benjamin
- Computational and Bio-simulation Research Group, University of Calabar Calabar Nigeria
- Department of Microbiology, University of Calabar Calabar Nigeria
| | - Rawlings A Timothy
- Computational and Bio-simulation Research Group, University of Calabar Calabar Nigeria
- Department of Pure and Applied Chemistry, University of Calabar Calabar Nigeria
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Agurokpon D, Louis H, Benjamin I, Godfrey OC, Ghotekar S, Adeyinka AS. Impact of Polythiophene ((C 4H 4S) n; n = 3, 5, 7, 9) Units on the Adsorption, Reactivity, and Photodegradation Mechanism of Tetracycline by Ti-Doped Graphene/Boron Nitride (Ti@GP_BN) Nanocomposite Materials: Insights from Computational Study. ACS Omega 2023; 8:42340-42355. [PMID: 38024685 PMCID: PMC10652268 DOI: 10.1021/acsomega.3c04625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 09/08/2023] [Indexed: 12/01/2023]
Abstract
This study addresses the formidable persistence of tetracycline (TC) in the environment and its adverse impact on soil, water, and microbial ecosystems. To combat this issue, an innovative approach by varying polythiophene ((C4H4S)n; n = 3, 5, 7, 9) units and the subsequent interaction with Ti-doped graphene/boron nitride (Ti@GP_BN) nanocomposites was applied as catalysts for investigating the molecular structure, adsorption, excitation analysis, and photodegradation mechanism of tetracycline within the framework of density functional theory (DFT) at the B3LYP-gd3bj/def2svp method. This study reveals a compelling correlation between the adsorption potential of the nanocomposites and their corresponding excitation behaviors, particularly notable in the fifth and seventh units of the polythiophene configuration. These units exhibit distinct excitation patterns, characterized by energy levels of 1.3406 and 924.81 nm wavelengths for the fifth unit and 1.3391 and 925.88 nm wavelengths for the seventh unit. Through exploring deeper, the examination of the exciton binding energy emerges as a pivotal factor, bolstering the outcomes derived from both UV-vis transition analysis and adsorption exploration. Notably, the calculated exciton binding energies of 0.120 and 0.103 eV for polythiophene units containing 5 and 7 segments, respectively, provide compelling confirmation of our findings. This convergence of data reinforces the integrity of our earlier analyses, enhancing our understanding of the intricate electronic and energetic interplay within these intricate systems. This study sheds light on the promising potential of the polythiophene/Ti-doped graphene/boron nitride nanocomposite as an efficient candidate for TC photodegradation, contributing to the advancement of sustainable environmental remediation strategies. This study was conducted theoretically; hence, experimental studies are needed to authenticate the use of the studied nanocomposites for degrading TC.
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Affiliation(s)
- Daniel
C. Agurokpon
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
| | - Hitler Louis
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
- Department
of Pure and Applied Chemistry, University
of Calabar, Calabar 540221, Nigeria
- Centre for
Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital
and Research Institute, Chettinad Academy
of Research and Education, Kelambakkam 603103, Tamil Nadu India
| | - Innocent Benjamin
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
| | - Obinna C. Godfrey
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
- Department
of Biochemistry, University of Calabar, Calabar 540221, Nigeria
| | - Suresh Ghotekar
- Department
of Chemistry, Smt. Devkiba Mohansinhji, Chauhan College of Commerce
and Science, University of Mumbai, Silvassa 396, India
| | - Adedapo S. Adeyinka
- Department
of Chemical Sciences, University of Johannesburg, Auckland Park 2006, South-Africa
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6
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Udoikono AD, Agwamba EC, Louis H, Benjamin I, Ahmad I, Ejiofor EU, Ahuekwe EF, Chukwuemeka K, Adeyinka AS, Patel HM, Manicum AL, Edim M. Anti-inflammatory biomolecular activity of chlorinated-phenyldiazenyl-naphthalene-2-sulfonic acid derivatives: perception from DFT, molecular docking, and molecular dynamic simulation. J Biomol Struct Dyn 2023; 41:10136-10160. [PMID: 36519503 DOI: 10.1080/07391102.2022.2153414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 11/24/2022] [Indexed: 12/23/2022]
Abstract
In this study, two novel derivatives of naphthalene-2-sulfonic acid: 6-(((1S,5R)-3,5-dichloro-2,4,6-triazabicyclo [z3.1.0]hex-3-en-1-yl)amino)-5-((E)-phenyldiazenyl)naphthalene-2-sulfonic acid (DTPS1) and (E)-6-((4,6-dichloro-1,3,5-triazine2-yl)amino)-4-hydroxy-3-(phenyldiazenyl)naphthalene-2-sulfonic acid (DTPS2) have been synthesized and characterized using FT-IR, UV-vis, and NMR spectroscopic techniques. Applying density functional theory (DFT) at the B3LYP, APFD, PBEPBE, HCTH, TPSSTPSS, and ωB97XD/aug-cc-pVDZ level of theories for the electronic structural properties. In-vitro analysis, molecular docking, molecular dynamic (MD) simulation of the compounds was conducted to investigate the anti-inflammatory potential using COXs enzymes. Docking indicates binding affinity of -9.57, -9.60, -6.77 and -7.37 kcal/mol for DTPS1, DTPS2, Ibuprofen and Diclofenac which agrees with in-vitro assay. Results of MD simulation, indicates sulphonic group in DTPS1 has > 30% interaction with the hydroxyl and oxygen atoms in amino acid residues, but > 35% interaction with the DTPS2. It can be said that the DTPS1 and DTPS2 can induce inhibitory effect on COXs to halt biosynthesis of prostaglandins (PGs), a chief mediator of inflammation and pain in mammals.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Akaninyene D Udoikono
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Ernest C Agwamba
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Chemical Sciences, Clifford University Owerrinta, Nigeria
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Iqrar Ahmad
- Department of Biological Sciences, Covenant University, Ota, Nigeria
| | - Emmanuel U Ejiofor
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Chemical Sciences, Clifford University Owerrinta, Nigeria
| | - Eze F Ahuekwe
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Biological Sciences, Covenant University, Ota, Nigeria
| | - Kelechi Chukwuemeka
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Chemical Sciences, Clifford University Owerrinta, Nigeria
| | - Adedapo S Adeyinka
- Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg, Johannesburg, South Africa
| | - Harun M Patel
- Department of Biological Sciences, Covenant University, Ota, Nigeria
- Division of Computer-Aided Drug Design, Department of Pharmaceutical Chemistry, R. C. Patel Institute of Pharmaceutical Education and Research, Shirpur, Maharashtra, India
| | - Amanda-Lee Manicum
- Department of Chemistry, Tshwane University of Technology, Pretoria, South Africa
| | - Moses Edim
- Cross River State University of Technology, Calabar, Nigeria
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7
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Benjamin I, Louis H, Ogungbemiro FO, Agurokpon DC, Ekpong BO, Gber TE, Pembere AMS. Single-atoms (N, P, S) encapsulation of Ni-doped graphene/PEDOT hybrid materials as sensors for H 2S gas applications: intuition from computational study. Sci Rep 2023; 13:18856. [PMID: 37914823 PMCID: PMC10620405 DOI: 10.1038/s41598-023-46153-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 10/28/2023] [Indexed: 11/03/2023] Open
Abstract
This comprehensive study was dedicated to augmenting the sensing capabilities of Ni@GP_PEDOT@H2S through the strategic functionalization with nitrogen, phosphorus, and sulfur heteroatoms. Governed by density functional theory (DFT) computations at the gd3bj-B3LYP/def2svp level of theory, the investigation meticulously assessed the performance efficacy of electronically tailored nanocomposites in detecting H2S gas-a corrosive byproduct generated by sulfate reducing bacteria (SRB), bearing latent threats to infrastructure integrity especially in the oil and gas industry. Impressively, the analysed systems, comprising Ni@GP_PEDOT@H2S, N_Ni@GP_PEDOT@H2S, P_Ni@GP_PEDOT@H2S, and S_Ni@GP_PEDOT@H2S, unveiled both structural and electronic properties of noteworthy distinction, thereby substantiating their heightened reactivity. Results of adsorption studies revealed distinct adsorption energies (- 13.0887, - 10.1771, - 16.8166, and - 14.0955 eV) associated respectively with N_Ni@GP_PEDOT@H2S, P_Ni@GP_PEDOT@H2S, S_Ni@GP_PEDOT@H2S, and Ni@GP_PEDOT systems. These disparities vividly underscored the diverse strengths of the adsorbed H2S on the surfaces, significantly accentuating the robustness of S_Ni@GP_PEDOT@H2S as a premier adsorbent, fuelled by the notably strong sulfur-surface interactions. Fascinatingly, the sensor descriptor findings unveiled multifaceted facets pivotal for H2S detection. Ultimately, molecular dynamic simulations corroborated the cumulative findings, collectively underscoring the pivotal significance of this study in propelling the domain of H2S gas detection and sensor device innovation.
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Affiliation(s)
- Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Microbiology, University of Calabar, Calabar, Nigeria
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria.
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria.
| | - Festus O Ogungbemiro
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Chemistry, Federal University of Lafia, Lafia, Nassarawa State, Nigeria
| | - Daniel C Agurokpon
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Bassey O Ekpong
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Microbiology, University of Calabar, Calabar, Nigeria
| | - Terkumbur E Gber
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria
| | - Anthony M S Pembere
- Department of Chemistry, Jaramogi Odinga University of Science and Technology, Bondo, Kenya
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Ejiofor EU, Ishebe JE, Benjamin I, Okon GA, Gber TE, Louis H. Exploring the potential of single-metals (Cu, Ni, Zn) decorated Al 12N 12 nanostructures as sensors for flutamide anticancer drug. Heliyon 2023; 9:e20682. [PMID: 37867907 PMCID: PMC10589786 DOI: 10.1016/j.heliyon.2023.e20682] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 08/28/2023] [Accepted: 10/04/2023] [Indexed: 10/24/2023] Open
Abstract
In recent years, scientists have been actively exploring and expanding biosensor technologies and materials to meet the growing societal demands in healthcare and other fields. This study aims to revolutionize biosensors by using density functional theory (DFT) at the cutting-edge B3LYP-GD3BJ/def2tzsvp level to investigate the sensing capabilities of (Cu, Ni, and Zn) doped on Aluminum nitride (Al12N12) nanostructures. Specifically, we focus on their potential to detect, analyze, and sense the drug flutamide (FLU) efficiently. Through advanced computational techniques, we explore molecular interactions to pave the way for highly effective and versatile biosensors. The adsorption energy values of -38.76 kcal/mol, -39.39 kcal/mol, and -39.37 kcal/mol for FLU@Cu-Al12N12, FLU@Ni-Al12N12, and FLU@Zn-Al12N12, respectively, indicate that FLU chemically adsorbs on the studied nanostructures. The reactivity and conductivity of the system follow a decreasing pattern: FLU@Cu-Al12N12 > FLU@Ni-Al12N12 > FLU@Zn-Al12N12, with a band gap of 0.267 eV, 2.197 eV, and 2.932 eV, respectively. These results suggest that FLU preferably adsorbs on the Al12N12@Cu surface. Natural bond orbital analysis reveals significant transitions in the studied system. Quantum theory of atom in molecule (QTAIM) and Non-covalent interaction (NCI) analysis confirm the nature and strength of interactions. Overall, our findings indicate that the doped surfaces show promise as electronic and biosensor materials for detection of FLU in real-world applications. We encourage experimental researchers to explore the use of (Cu, Ni, and Zn) doped on Aluminum nitride (Al12N12), particularly Al12N12@Cu, for biosensor applications.
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Affiliation(s)
- Emmanuel U. Ejiofor
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Chemical Sciences, Clifford University, Owerrinta, Nigeria
| | | | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Gideon A. Okon
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Terkumbur E. Gber
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Chemical Sciences, Clifford University, Owerrinta, Nigeria
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria
- Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam 603103, Tamil Nadu, India
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9
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Gber TE, Louis H, Ngana OC, Amodu IO, Ekereke EE, Benjamin I, Adalikwu SA, Adeyinka A. Yttrium- and zirconium-decorated Mg 12O 12-X (X = Y, Zr) nanoclusters as sensors for diazomethane (CH 2N 2) gas. RSC Adv 2023; 13:25391-25407. [PMID: 37636506 PMCID: PMC10448449 DOI: 10.1039/d3ra02939e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 07/21/2023] [Indexed: 08/29/2023] Open
Abstract
Diazomethane (CH2N2) presents a notable hazard as a respiratory irritant, resulting in various adverse effects upon exposure. Consequently, there has been increasing concern in the field of environmental research to develop a sensor material that exhibits heightened sensitivity and conductivity for the detection and adsorption of this gas. Therefore, this study aims to provide a comprehensive analysis of the geometric structure of three systems: CH2N2@MgO (C1), CH2N2@YMgO (CY1), and CH2N2@ZrMgO (CZ1), in addition to pristine MgO nanocages. The investigation involves a theoretical analysis employing the DFT/ωB97XD method at the GenECP/6-311++G(d,p)/SDD level of theory. Notably, the examination of bond lengths within the MgO cage yielded specific values, including Mg15-O4 (1.896 Å), Mg19-O4 (1.952 Å), and Mg23-O4 (1.952 Å), thereby offering valuable insights into the structural properties and interactions with CH2N2 gas. Intriguingly, after the interaction, bond length variations were observed, with CH2N2@MgO exhibiting shorter bonds and CH2N2@YMgO showcasing longer bonds. Meanwhile, CH2N2@ZrMgO displayed shorter bonds, except for a longer bond in Mg19-O4, suggesting increased stability due to shorter bond distances. The study further investigated the electronic properties, revealing changes in the energy gap that influenced electrical conductivity and sensitivity. The energy gap increased for Zr@MgO, CH2N2@MgO, CH2N2@YMgO, and CH2N2@ZrMgO, indicating weak interactions on the MgO surface. Conversely, Y@MgO showed a decrease in energy, suggesting a strong interaction. The pure MgO surface exhibited the ability to donate and accept electrons, resulting in an energy gap of 4.799 eV. Surfaces decorated with yttrium and zirconium exhibited decreased energies of the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO), as well as decreased energy gap, indicating increased conductivity and sensitivity. Notably, Zr@MgO had the highest energy gap before CH2N2 adsorption, but C1 exhibited a significantly higher energy gap after adsorption, implying increased conductivity and sensitivity. The study also examined the density of states, demonstrating significant variations in the electronic properties of MgO and its decorated surfaces due to CH2N2 adsorption. Moreover, various analysis techniques were employed, including natural bond orbital (NBO), quantum theory of atoms in molecules (QTAIM), and noncovalent interaction (NCI) analysis, which provided insights into bonding, charge density, and intermolecular interactions. The findings contribute to a deeper understanding of the sensing mechanisms of CH2N2 gas on nanocage surfaces, shedding light on adsorption energy, conductivity, and recovery time. These results hold significance for gas-sensing applications and provide a basis for further exploration and development in this field.
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Affiliation(s)
- Terkumbur E Gber
- Computational and Bio-Simulation Research Group, University of Calabar Calabar Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar Calabar Nigeria
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar Calabar Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar Calabar Nigeria
- Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education Kelambakkam-603103 Tamil Nadu India
| | - Obinna C Ngana
- Department of Chemical Sciences, Federal University of Wukari Wukari Taraba State Nigeria
| | - Ismail O Amodu
- Computational and Bio-Simulation Research Group, University of Calabar Calabar Nigeria
- Department of Mathematics, Faculty of Physical Sciences, University of Calabar Calabar Nigeria
| | - Ernest E Ekereke
- Computational and Bio-Simulation Research Group, University of Calabar Calabar Nigeria
- Department of Mathematics, Faculty of Physical Sciences, University of Calabar Calabar Nigeria
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar Calabar Nigeria
| | - Stephen A Adalikwu
- Computational and Bio-Simulation Research Group, University of Calabar Calabar Nigeria
| | - Adedapo Adeyinka
- Department of Chemical Sciences, University of Johannesburg South Africa
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10
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Mohamed MAF, Benjamin I, Okon GA, Ahmad I, Khan SAPM, Patel H, Agwamba EC, Louis H. Insights into in-vitro studies and molecular modelling of the antimicrobial efficiency of 4-chlorobenzaldehyde and 4-methoxybenzaldehyde derivatives. J Biomol Struct Dyn 2023:1-23. [PMID: 37504959 DOI: 10.1080/07391102.2023.2239917] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Owing to the significant gap in the knowledge and understanding of the mechanisms of antimicrobial action and the development of resistance, the optimization of antimicrobial therapies therefore becomes a necessity. It is on this note, that this study seeks to both experimentally and theoretically investigate the antimicrobial efficiency of two synthesized compounds namely; 1-((4-methoxyphenyl) (morpholino)methyl)thiourea (MR1) and diethyl 4-(4-chlorophenyl)-2,6-diphenyl-1,4-dihydropyridine-3,5-dicarboxylate (HRC). Utilizing the density functional theory (DFT), the compounds were optimized at ωB97XD/6-31++G(2d, 2p) level of theory. This provided a clear explanation for their distinct reactivity and stability potentials. More so, the natural bond orbital (NBO) analysis confirmed strong intra and intermolecular interactions, which agreed with the calculated reactivity parameters and density of states (DOS). Upon assessing the antimicrobial efficacy of the synthesized compounds, it was found that they exhibited lower activity against Enterobacter and A. niger, but considerable activity against Moraxella. In contrast, they showed higher activity against B. subtilis and Trichophyton, indicating that the compounds are more effective against gram-positive bacteria than gram-negative ones. Hence, it can be asserted that the synthesized compounds have superior antifungal action than antibacterial activity. A fascinating aspect of the data is that they show interactions that are incredibly insightful, totally correlating with the simulations of both molecular docking and molecular dynamics. Therefore, the alignment between experimental findings and computational simulations strengthens the validity of the study's conclusions, emphasizing the significance of the synthesized compounds in the context of optimizing antimicrobial therapies.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Mashood A F Mohamed
- PG and Research Department of Chemistry, Jamal Mohamed College (Autonomous), Affiliated to Bharathidasan University, Tiruchirappalli, Tamilnadu, India
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Microbiology, Faculty of Biological Sciences, University of Calabar, Calabar, Nigeria
| | - Gideon A Okon
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Iqrar Ahmad
- Department of Pharmaceutical Chemistry, Prof. Ravindra Nikam College of Pharmacy, Dhule, Maharashtra, India
| | - Syed A P M Khan
- PG and Research Department of Chemistry, Jamal Mohamed College (Autonomous), Affiliated to Bharathidasan University, Tiruchirappalli, Tamilnadu, India
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Harun Patel
- Division of Computer Aided Drug Design, Department of Pharmaceutical Chemistry, R. C. Patel Institute of Pharmaceutical Education and Research, Shirpur, Maharashtra, India
| | - Ernest C Agwamba
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamil Nadu, India
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Mujafarkani N, Bassey V, Tokono JJ, Ahamed AJ, Benjamin I, Agurokpon DC, Waliya YJ, Louis H. Synthesis, characterization, and molecular modeling of phenylenediamine-phenylhydrazine-formaldehyde terpolymer (PPHF) as potent anti-inflammatory agent. Heliyon 2023; 9:e18067. [PMID: 37483726 PMCID: PMC10362139 DOI: 10.1016/j.heliyon.2023.e18067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 07/05/2023] [Accepted: 07/05/2023] [Indexed: 07/25/2023] Open
Abstract
Inflammation, a characteristic physiological response to infections and tissue damage, commences with processes involving tissue repair and pathogen elimination, contributing to the restoration of homeostasis at affected sites. Hence, this study presents a comprehensive analysis addressing diverse aspects associated with this phenomenon. The investigation encompasses the synthesis, spectral characterizations (FT-IR, 1H NMR, and 13C NMR), and molecular modeling of p-phenylenediamine-phenylhydrazine-formaldehyde terpolymer (PPHF), a potent agent in promoting inflammation. To explore the reactivity, bonding nature, and spectroscopy, as well as perform molecular docking for in-silico biological evaluation, density functional theory (DFT) utilizing the def2svp/B3LYP-D3BJ method was employed. The results reveal significant biological activity of the tested compound in relation to anti-inflammatory proteins, specifically 6JD8, 5TKB, and 4CYF. Notably, upon interaction between PPHF and 6JD8, a binding affinity of -4.5 kcal/mol was observed. Likewise, the interaction with 5TKB demonstrated an affinity of -7.8 kcal/mol. Furthermore, a bonding affinity of -8.1 kcal/mol was observed for the interaction with 4CYF. Importantly, these values closely correspond to those obtained from the interaction between the proteins and the standard drug ibuprofen (IBF), which exhibited binding affinities of -5.9 kcal/mol, -7.0 kcal/mol, and -6.1 kcal/mol, respectively. Thus, these results provide compelling evidence affirming the tremendous potential of p-phenylenediamine-phenylhydrazine-formaldehyde (PPHF) as a highly promising anti-inflammatory agent, owing to the presence of nitrogen-a heteroatom within the compound.
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Affiliation(s)
- N. Mujafarkani
- PG and Research Department of Chemistry, Jamal Mohamed College (Autonomous), (Affiliated to Bharathidasan University), Tiruchirappalli, 620020, Tamilnadu, India
| | - Victoria Bassey
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria
| | - Jumbo J. Tokono
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria
| | - A. Jafar Ahamed
- PG and Research Department of Chemistry, Jamal Mohamed College (Autonomous), (Affiliated to Bharathidasan University), Tiruchirappalli, 620020, Tamilnadu, India
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Daniel C. Agurokpon
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Microbiology, University of Cross River State, Calabar Nigeria
| | - Yohanna J. Waliya
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam 603103, Tamil Nadu, India
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Akpe MA, Okon GA, Louis H, Benjamin I, Akem MU, Brown OI, Adalikwu SA, Adeyinka AS. Metals (Ga, In) decorated fullerenes as nanosensors for the adsorption of 2,2-dichlorovinyldimethylphosphate agrochemical based pollutant. Sci Rep 2023; 13:10470. [PMID: 37380664 DOI: 10.1038/s41598-023-37650-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 06/25/2023] [Indexed: 06/30/2023] Open
Abstract
Owing to the fact that the use of 2,2-dichlorovinyldimethylphosphate (DDVP) as an agrochemical has become a matter of concern due to its persistence and potential harm to the environment and human health. Detecting and addressing DDVP contamination is crucial to protect human health and mitigate ecological impacts. Hence, this study focuses on harnessing the properties of fullerene (C60) carbon materials, known for their biological activities and high importance, to develop an efficient sensor for DDVP. Additionally, the sensor's performance is enhanced by doping it with gallium (Ga) and indium (In) metals to investigate the sensing and trapping capabilities of DDVP molecules. The detection of DDVP is carefully examined using first-principles density functional theory (DFT) at the Def2svp/B3LYP-GD3(BJ) level of theory, specifically analyzing the adsorption of DDVP at the chlorine (Cl) and oxygen (O) sites. The adsorption energies at the Cl site were determined as - 57.894 kJ/mol, - 78.107 kJ/mol, and - 99.901 kJ/mol for Cl_DDVP@C60, Cl_DDVP@Ga@C60, and Cl_DDVP@In@C60 interactions, respectively. At the O site, the adsorption energies were found to be - 54.400 kJ/mol, - 114.060 kJ/mol, and - 114.056 kJ/mol for O_DDVP@C60, O_DDVP@Ga@C60, and O_DDVP@In@C60, respectively. The adsorption energy analysis highlights the chemisorption strength between the surfaces and the DDVP molecule at the Cl and O sites of adsorption, indicating that the O adsorption site exhibits higher adsorption energy, which is more favorable according to the thermodynamics analysis. Thermodynamic parameters (∆H and ∆G) obtained from this adsorption site suggest considerable stability and indicate a spontaneous reaction in the order O_DDVP@Ga@C60 > O_DDVP@In@C60 > O_DDVP@C60. These findings demonstrate that the metal-decorated surfaces adsorbed on the oxygen (O) site of the biomolecule offer high sensitivity for detecting the organophosphate molecule DDVP.
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Affiliation(s)
- Michael A Akpe
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria
| | - Gideon A Okon
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Chemical Sciences, Clifford University, Owerrinta, Nigeria
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria.
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria.
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria.
| | - Martilda U Akem
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria
| | - Onyebuenyi I Brown
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria
| | - Stephen A Adalikwu
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Adedapo S Adeyinka
- Department of Chemical Sciences, Research Centre for Synthesis and Catalysis, University of Johannesburg, Johannesburg, 2006, South Africa
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13
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Louis H, Mbim EN, Okon GA, Edet UO, Benjamin I, Ejiofor EU, Manicum ALE. Systematic exo-endo encapsulation of hydroxyurea (HU) by Cu, Ag, and Au-doped gallium nitride nanotubes (GaNNT) for smart therapeutic delivery. Comput Biol Med 2023; 161:106934. [PMID: 37257404 DOI: 10.1016/j.compbiomed.2023.106934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/07/2023] [Accepted: 04/13/2023] [Indexed: 06/02/2023]
Abstract
Similar to the more well-known carbon nanotubes, gallium nitride nanotubes (GaNNT) are among the materials that scientists have found to be extremely helpful in transporting drugs and to provide significant potential for multi-modal medical therapies. Here, the potential of Cu, Ag, and Au-doped GaNNT for smart delivery of the anticancer medication hydroxyurea (HU) was extensively investigated employing quantum chemical analysis and density functional theory (DFT) computation at the B3LYP-GD3BJ/def2-SVP level of theory. The systematic approach used in this study entails examining the exo (outside)-and endo (inside) loading of HU utilizing the investigated nanotubes in order to understand the adsorption, sensing processes, bonding types, and thermodynamic properties. Results of the HOMO-LUMO studies show that metal-doped GaNNTs with the hydroxyurea (HU) at the endo - interaction of the drug of the nanotube produced more reduced energy gaps (0.911-2.039 eV) compared with metal-doped GaNNTs complexes at the outside - interaction of the drug on the nanotube (2.25-3.22 eV) and as such reveal their suitability for use as drug delivery materials. As observed in the endo-interaction of HU adsorptions in the tubes, HU_endo_Au@GaNNT possessed the highest adsorption energy values of -118.716 kcal/mol which shows the most chemisorption between the surfaces and the adsorbate while for HU_exo_Ag@GaNNT is -97.431 kcal/mol for the highest exo-interactions. These results suggest that HU drug interacted inside the Ag, Au, and Cu doped GaNNT will be very proficient as a carrier of the HU drug into bio systems. These results are along with visual studies of weak interactions, thermodynamics, sensor, and drug release mechanisms suggest strongly the endo-encapsulation of HU as the best mode for smart drug delivery.
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Affiliation(s)
- Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria; Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria.
| | - Elizabeth N Mbim
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria; Department of Public Health, Arthur Jarvis University, Akpabuyo, Nigeria
| | - Gideon A Okon
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria; Department of Chemical Sciences, Clifford University, Owerrinta, Nigeria
| | - Uwem O Edet
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria; Department of Microbiology, Arthur Jarvis University, Akpabuyo, Nigeria
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria; Department of Microbiology, Faculty of Biological Sciences, University of Calabar, Nigeria.
| | - Emmanuel U Ejiofor
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria; Department of Chemical Sciences, Clifford University, Owerrinta, Nigeria
| | - Amanda-Lee E Manicum
- Department of Chemistry, Tshwane University of Technology, Pretoria, South Africa
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Qader SW, Ozdemir M, Benjamin I, Chima CM, Suvitha A, Rani JC, Gber TE, Kothandan G. Toxicity, Pharmacokinetic Profile, and Compound-Protein Interaction Study of Polygonum minus Huds Extract. Appl Biochem Biotechnol 2023:10.1007/s12010-023-04499-6. [PMID: 37129743 DOI: 10.1007/s12010-023-04499-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/11/2023] [Indexed: 05/03/2023]
Abstract
Several phytochemicals with potential for bioactivity can be found in Polygonum minus (PM). The goal of this investigation was to establish the minimally toxic dose of PM for pharmaceutical use. To explain the stability and reactivity of the compounds under study, the lowest unoccupied molecular orbital (LUMO), the highest occupied molecular orbital (HOMO), and the natural bond orbital were all combined. Additionally, the cytotoxicity of the aqueous and ethanolic extract of PM on the (Hs888Lu) cell line was determined using the MTS Assay Kit (cell proliferation) (colorimetric). The hematological, hepatic, and renal functions were examined during the acute toxicity test on Sprague Dawley rats. SwissADME and ADMET were used to investigate the absorption, distribution, metabolism, excretion, and toxicity (ADMET) of the chemicals isolated from PM, including gallic acid, quercetin, rutin, and coumaric acid (PMCs). Molecular docking was used to examine the inhibitory effect against human H+/K+ ATPase, cyclooxygenase-2, and acetylcholinesterase. The outcomes indicated that neither the aqueous nor the ethanolic extract of PM is harmful. The development of plant-based medicine was made possible by the phenolic chemicals, primarily quercetin and rutin, which exhibit a considerable binding affinity to human H+/K+ ATPase, cyclooxygenase-2, and acetylcholinesterase.
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Affiliation(s)
- Suhailah Wasman Qader
- Department of Medical Laboratory Science, Knowledge University, 44002, Erbil, Kurdistan Region, Iraq.
| | - Mehmet Ozdemir
- Department of Dentistry, Faculty of Dentistry, Tishk International University, 44002, Erbil, Kurdistan Region, Iraq
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria.
| | - Chioma M Chima
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - A Suvitha
- Department of Physics, CMR Institute of Technology, Bengaluru, 560037, Karnataka, India
| | - Jaquline Chinna Rani
- Department of Plant Biology and Biotechnology, Loyola College, Chennai, Tamil Nadu, India
| | - Terkumbur E Gber
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Gugan Kothandan
- Biopolymer Modeling and Protein Chemistry Laboratory, CAS in Crystallography and Biophysics, University of Madras, Chennai, Tamil Nadu, India
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15
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Louis H, Amodu IO, Eno EA, Benjamin I, Gber TE, Unimuke TO, Isang BB, Adeyinka AS. Modeling the Interactionof F-gases on Ruthenium-Doped Boron Nitridenanotube. Chemistry Africa 2023. [DOI: 10.1007/s42250-023-00645-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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Benjamin I, Louis H, Okon GA, Qader SW, Afahanam LE, Fidelis CF, Eno EA, Ejiofor EE, Manicum ALE. Transition Metal-Decorated B 12N 12-X (X = Au, Cu, Ni, Os, Pt, and Zn) Nanoclusters as Biosensors for Carboplatin. ACS Omega 2023; 8:10006-10021. [PMID: 36969422 PMCID: PMC10035017 DOI: 10.1021/acsomega.2c07250] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 01/09/2023] [Indexed: 06/02/2023]
Abstract
Theoretical studies on the adsorption, sensibility, and reactivity of a boron nitride nanocage decorated with Au, Cu, Ni, Os, Pt, and Zn metals as a biosensor material were carried out for the adsorption of carboplatin by applying the density functional theory computation at the B3LYP-GD3BJ/def2svp level of theory. All the optimized structures, as well as the calculations as regards the studied objective including electronic properties, geometry optimization parameters, adsorption energy studies, natural bond orbital analysis, topology studies, sensor mechanistic parameters, and thermodynamic properties (ΔG and ΔH), were investigated herein. As a result, the noticeable change in the energy gap of the studied surfaces when interacting with carboplatin accounted for the surfaces' reactivity, stability, conductivity, work function, and overall adsorption ability, implying that the studied decorated surfaces are good sensor materials for sensing carboplatin. Furthermore, the negative adsorption energies obtained for interacting surfaces decorated with Cu, Ni, Os, and Zn suggest that the surface has a superior ability to sense carboplatin as chemisorption was seen. Substantially, the geometric short adsorption bond length after adsorption, thermodynamically spontaneous reactions, and acceptable sensor mechanism results demonstrate that the investigated surfaces have strong sensing characteristics for sensing carboplatin.
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Affiliation(s)
- Innocent Benjamin
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
| | - Hitler Louis
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
- Department
of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar 540221, Nigeria
| | - Gideon A. Okon
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
- Department
of Chemical Sciences, Clifford University, Owerrinta 451101, Nigeria
| | - Suhailah W. Qader
- Department
of Medical Laboratory Science, Knowledge
University, Erbil 44001, Iraq
| | - Lucy E. Afahanam
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
| | - Chidera F. Fidelis
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
- Department
of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar 540221, Nigeria
| | - Ededet A. Eno
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
- Department
of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar 540221, Nigeria
| | - Emmanuel E. Ejiofor
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
- Department
of Chemical Sciences, Clifford University, Owerrinta 451101, Nigeria
| | - Amanda-Lee E. Manicum
- Department
of Chemistry, Tshwane University of Technology, Pretoria 0183, South Africa
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Afahanam LE, Louis H, Benjamin I, Gber TE, Ikot IJ, Manicum ALE. Heteroatom (B, N, P, and S)-Doped Cyclodextrin as a Hydroxyurea (HU) Drug Nanocarrier: A Computational Approach. ACS Omega 2023; 8:9861-9872. [PMID: 36969463 PMCID: PMC10035006 DOI: 10.1021/acsomega.2c06630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/20/2022] [Indexed: 06/18/2023]
Abstract
Theoretical examination of hydroxyurea adsorption capabilities toward the cyclodextrin surface for proper drug delivery systems was carried out utilizing DFT simulations. The study aims to assess the efficacy of doped cyclodextrin (doped with boron, nitrogen, phosphorus, and sulfur atoms) in increasing its stability and efficiency in intermolecular interactions, hence facilitating optimal drug delivery. The adsorption energies were found to follow a decreasing order of B@ACD-HU>N@ACD-HU>P@ACD-HU>S@ACD-HU with energies of -0.046, -0.0326, -0.015, and 0.944 kcal/mol, respectively. The S@ACD-HU complex, unlike previous systems, had a physical adsorption energy. The N@ACD-HU and B@ACD-HU complexes had the shortest bond lengths of 1.42 Å (N122-C15) and 1.54 Å (B126-C15), respectively. The HOMO and LUMO values were also high in identical systems, -6.367 and -2.918 eV (B@ACD-HU) and -6.278 and -1.736 eV (N@ACD-HU), respectively, confirming no chemical interaction. The N@ACD-HU has the largest energy gap of 4.54 eV. For the QTAIM analysis and plots, the maximum electron density and ellipticity index were detected in B@ACD-HU, 0.600 au (H70-N129) and 0.8685 au (H70-N129), respectively, but N@ACD-HU exhibited a high Laplacian energy of 0.7524 a.u (H133-N122). The fragments' TDOS, OPDOS, and PDOS exhibited a strong bond interaction of greater than 1, and they had different Fermi levels, with the highest value of -8.16 eV in the N@ACD-HU complex. Finally, the NCI analysis revealed that the complexes were noncovalent. According to the literature, the van der Waals form of interactions is used in the intermolecular forces of cyclodextrin cavities. The B@ACD-HU and N@ACD-HU systems were more greenish in color with no spatial interaction. These two systems have outperformed other complexes in intermolecular interactions, resulting in more efficient drug delivery. They had the highest negative adsorption energies, the shortest bond length, the highest HOMO/LUMO energies, the highest energy gap, the highest stabilization energy, the strongest bonding effect, the highest electron density, the highest ellipticity index, and a strong van der Waals interaction that binds the drug and the surface together.
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Affiliation(s)
- Lucy E. Afahanam
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar P.M.B 1115, Nigeria
| | - Hitler Louis
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar P.M.B 1115, Nigeria
- Department
of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar P.M.B 1115, Nigeria
| | - Innocent Benjamin
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar P.M.B 1115, Nigeria
- Department
of Microbiology, Faculty of Biological Sciences, University of Calabar, Calabar P.M.B 1115, Nigeria
| | - Terkumbur E. Gber
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar P.M.B 1115, Nigeria
- Department
of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar P.M.B 1115, Nigeria
| | - Immaculata J. Ikot
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar P.M.B 1115, Nigeria
- Department
of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar P.M.B 1115, Nigeria
| | - Amanda-Lee E. Manicum
- Department
of Chemistry, Tshwane University of Technology, Pretoria 0183, South Africa
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18
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Utsu PM, Gber TE, Nwosa DO, Nwagu AD, Benjamin I, Ikot IJ, Eno EA, Offiong OE, Adeyinka A, Louis H. Modeling of Anthranilhydrazide (HL1) Salicylhydrazone and Its Copper Complexes Cu(I) and Cu(II) as a Potential Antimicrobial and Antituberculosis Therapeutic Candidate. Polycycl Aromat Compd 2023. [DOI: 10.1080/10406638.2023.2186444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
Affiliation(s)
- Patrick M. Utsu
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Terkumbur E. Gber
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Deborah O. Nwosa
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Adanna D. Nwagu
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Immaculata J. Ikot
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Ededet A. Eno
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Offiong E. Offiong
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Adedabo Adeyinka
- Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg, South Africa
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
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19
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Chukwuemeka K, Louis H, Benjamin I, Nyong PA, Ejiofor EU, Eno EA, Manicum ALE. Therapeutic Potential of B 12N 12-X (X = Au, Os, and Pt) Nanostructured as Effective Fluorouracil (5Fu) Drug Delivery Materials. ACS Appl Bio Mater 2023; 6:1146-1160. [PMID: 36802290 DOI: 10.1021/acsabm.2c00986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
In view of the research-substantiated comparative efficiency of nontoxic and bioavailable nanomaterials synergic with human systems for drug delivery, this work was aimed at studying the comparative efficiency of transition metal (Au, Os, and Pt)-decorated B12N12 nanocages in the adsorption of fluorouracil (5Fu), an antimetabolite-classed anticarcinogen administered for cancers of the breast, colon, rectum, and cervix. Three different metal-decorated nanocages interacted with 5Fu drug at the oxygen (O) and fluorine (F) sites, resulting in six adsorbent-adsorbate systems whose reactivity and sensitivity were investigated using density functional theory computation at the B3LYP/def2TZVP level of theory with special emphasis on the structural geometry, electronic, and topology analysis as well as the thermodynamic properties of the systems. While the electronic studies predicted Os@F as having the lowest and most favorable Egp and Ead of 1.3306 eV and -11.9 kcal/mol, respectively, the thermodynamic evaluation showed Pt@F to have the most favorable thermal energy (E), heat capacity (Cp), and entropy (ΔS) values as well as negative ΔH and ΔG while the adsorption studies showed that the greatest degree of chemisorption with Ead magnitude of -204.5023 kcal/mol was observed in energies ranging from -12.0 to 138.4 kcal/mol with Os@F and Au@F at the lower and upper borders. The quantum theory of atoms in molecules results show that the six systems had noncovalent interactions as well as a certain degree of partial covalency but none showed covalent interaction while the noncovalent interaction analysis corroborated this by showing that the six systems had favorable interactions, though of varying degrees, with very little trace of steric hindrance or electrostatic interactions. Overall, the study showed that notwithstanding the good performance of the six adsorbent systems considered, the Pt@F and Os@F showed the most favorable potential for the delivery of 5Fu.
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Affiliation(s)
- Kelechi Chukwuemeka
- Department of Chemical Sciences, Clifford University, Owerrinta 00000, Nigeria
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar 540211, Nigeria
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar 540211, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar 540211, Nigeria
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar 540211, Nigeria
- Department of Microbiology, Faculty of Biological Sciences, University of Calabar, Calabar 540211, Nigeria
| | - Peter A Nyong
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar 540211, Nigeria
| | - Emmanuel U Ejiofor
- Department of Chemical Sciences, Clifford University, Owerrinta 00000, Nigeria
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar 540211, Nigeria
| | - Ededet A Eno
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar 540211, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar 540211, Nigeria
| | - Amanda-Lee E Manicum
- Department of Chemistry, Tshwane University of Technology, Pretoria 0001, South Africa
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20
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Gannouni A, Louis H, Roisnel T, Isang BB, Benjamin I, Kefi R. X-Ray Crystallography, Spectral Analysis, DFT Studies, and Molecular Docking of (C 9H 15N 3)[CdCl 4] Hybrid Material against Methicillin-Resistant Staphylococcus aureus (MRSA). Polycycl Aromat Compd 2023. [DOI: 10.1080/10406638.2023.2169721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Affiliation(s)
- Afef Gannouni
- Faculté Des Sciences De Bizerte, Laboratoire de Chimie Des Matériaux, Zarzouna, Tunisie
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Thierry Roisnel
- Centre de Diffractométrie X, UMR 6226 CNRS, Institut Sciences Chimiques De Rennes, Université De Rennes I, Rennes, France
| | - Bartholomew B. Isang
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Mathematics, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Microbiology, Faculty of Biological Sciences, University of Calabar, Calabar, Nigeria
| | - Riadh Kefi
- Faculté Des Sciences De Bizerte, Laboratoire de Chimie Des Matériaux, Zarzouna, Tunisie
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21
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Ntui TN, Louis H, Isang BB, Imojara A, Amodu IO, Benjamin I, Akinterinwa A, Adeyinka AS. Trapping of dichlorosilane (H2SiCl2) gas by transition metals doped fullerene nanostructured materials. J INDIAN CHEM SOC 2023. [DOI: 10.1016/j.jics.2023.100940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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22
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Louis H, Akem MU, Benjamin I, Chukwu UG, Asogwa FC, Adeyinka AS. Modelling of Tungsten (C
59
W), Osmium (C
59
O
s
), and Platinum (C
59
Pt) Doped Fullerenes for Drug Delivery of Biguanides (BNG) and Metformin (MET): DFT Perspective. ChemistrySelect 2023. [DOI: 10.1002/slct.202203298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Hitler Louis
- Computational and Bio-Simulation Research Group University of Calabar Calabar Nigeria
- Department of Pure and Applied Chemistry Faculty of Physical Sciences University of Calabar Calabar Nigeria
| | - Martilda U. Akem
- Computational and Bio-Simulation Research Group University of Calabar Calabar Nigeria
- Department of Pure and Applied Chemistry Faculty of Physical Sciences University of Calabar Calabar Nigeria
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group University of Calabar Calabar Nigeria
- Department of Microbiology Faculty of Biological Sciences University of Calabar Calabar Nigeria
| | - Udochukwu G. Chukwu
- Computational and Bio-Simulation Research Group University of Calabar Calabar Nigeria
- Department of Pure and Applied Chemistry Faculty of Physical Sciences University of Calabar Calabar Nigeria
| | - Fredrick C. Asogwa
- Computational and Bio-Simulation Research Group University of Calabar Calabar Nigeria
- Department of Pure and Applied Chemistry Faculty of Physical Sciences University of Calabar Calabar Nigeria
| | - Adedapo S. Adeyinka
- Department of Chemical Sciences University of Johannesburg 2006 Johannesburg South-Africa
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23
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Makhlouf J, Louis H, Benjamin I, Ukwenya E, Valkonen A, Smirani W. Single crystal investigations, spectral analysis, DFT studies, antioxidants, and molecular docking investigations of novel hexaisothiocyanato chromate complex. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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24
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Benjamin I, Louis H, O. Ekpen F, Gber TE, Gideon ME, Ahmad I, Unimuke TO, P. Akanimo N, Patel H, Eko IJ, Simon O, Agwamba EC, Ejiofor EU. Modeling the anti-Methicillin-Resistant Staphylococcus aureus (MRSA) Activity of (E)-6-chloro-N 2-phenyl-N 4-(4-Phenyl-5-(Phenyl Diazinyl)-2λ 3, 3 λ 2- Thiazol-2-yl)-1, 3, 5-Triazine-2,4- Diamine. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2160773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Microbiology, Faculty of Biological Sciences, University of Calabar, Calabar, Nigeria
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Francis O. Ekpen
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Terkumbur E. Gber
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Mathias E. Gideon
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Iqrar Ahmad
- Division of Computer Aided Drug Design, Department of Pharmaceutical Chemistry, R. C. Patel; Institute of Pharmaceutical Education and Research, Shirpur, India
| | - Tomsmith O. Unimuke
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Nyong P. Akanimo
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Harun Patel
- Division of Computer Aided Drug Design, Department of Pharmaceutical Chemistry, R. C. Patel; Institute of Pharmaceutical Education and Research, Shirpur, India
| | | | - Ojima Simon
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Ernest C. Agwamba
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Emmanuel U. Ejiofor
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
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25
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Ntui TN, Oyo-Ita EE, Agwupuye JA, Benjamin I, Eko IJ, Ubana EI, Etiowo KM, Eluwa EC, Imojara A. Synthesis, Spectroscopic, DFT Study, and Molecular Modeling of Thiophene-Carbonitrile Against Enoyl-ACP Reductase Receptor. Chemistry Africa 2022. [DOI: 10.1007/s42250-022-00544-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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26
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Asogwa FC, Izuchukwu UD, Louis H, Eze CC, Ekeleme CM, Ezugwu JA, Benjamin I, Attah SI, Agwamba EC, Ekoh OC, Adeyinka AS. Synthesis, Characterization and Theoretical Investigations on the Molecular Structure, Electronic Property and anti-Trypanosomal Activity of Benzenesulphonamide-Based Carboxamide and Its Derivatives. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2150653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Fredrick C. Asogwa
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Cross River State, Nigeria
| | - Ugwu D. Izuchukwu
- Department of Pure & Industrial Chemistry, University of Nigeria, Nsukka, Enugu State, Nigeria
| | - Hitler Louis
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Cross River State, Nigeria
| | - Cosmas C. Eze
- Department of Pure & Industrial Chemistry, University of Nigeria, Nsukka, Enugu State, Nigeria
| | - Chinedu M. Ekeleme
- Department of Biochemistry, College of Basic Medical Sciences, University of Calabar, Calabar, Nigeria
| | - James A. Ezugwu
- Department of Pure & Industrial Chemistry, University of Nigeria, Nsukka, Enugu State, Nigeria
| | - Innocent Benjamin
- Department of Pure and Applied Chemistry, University of Calabar, Calabar, Cross River State, Nigeria
| | - Solomon I. Attah
- Department of Pure & Industrial Chemistry, University of Nigeria, Nsukka, Enugu State, Nigeria
| | - Ernest C. Agwamba
- Department of Chemical Sciences, Clifford University, Owerrinta, Nigeria
| | - Ogechi C. Ekoh
- Department of Chemistry, Evangel University, Akaeze, Nigeria
| | - Adedapo S. Adeyinka
- Department of Chemical Sciences, University of Johannesburg, Johannesburg, South Africa
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27
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Apebende CG, Louis H, Owen AE, Benjamin I, Amodu IO, Gber TE, Asogwa FC. Adsorption properties of metal functionalized fullerene (C 59Au, C 59Hf, C 59Ag, and C 59Ir) nanoclusters for application as a biosensor for hydroxyurea (HXU): insight from theoretical computation. Z PHYS CHEM 2022. [DOI: 10.1515/zpch-2022-0126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Abstract
This theoretical study was conducted to evaluate the efficiency of fullerene C60 and its metal functionalized nano clusters (C59Au, C59Hf, C59Ag and C59Ir) as a sensor for hydroxyurea (HXU). The various conclusions concerning the adsorption and sensing properties of the studied nano surfaces were achieved using density functional theory (DFT) at the M062X-D3/gen/LanL2DZ/def2svp level of theory. Among the nano clusters studied for this interaction, analysis of the HOMO–LUMO energy differences (E
g) showed that HXU@C59Hg (H2) reflects the least energy gap of 3.042 eV, indicating its greater reactivity, sensitivity and conductivity. Also, the adsorption phenomenon in this current study is best described as chemisorptions owing to the negative adsorption enthalpies observed. Thus, the adsorption energy (E
Ad) follows an increasing pattern of: HXU@C60 (C1) (−0.218 eV) < HXU@C59Ir (I1) (−1.361 eV) < HXU@C59Au (A1) (−1.986 eV) < HXU@C59Hf (H1) (−2.640 eV) < HXU@C59Hg (H2) (−3.347 eV). Least E
g, highest E
Ad and non-covalent nature of interaction attributed to C59Hg surface are sufficient to show that, among all studied surfaces, C59Hg surface emerged as the most suitable adsorbent for the adsorption of HXU. Hence, it can be used in modeling future adsorbent material for hydroxyurea.
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Affiliation(s)
- Chioma G. Apebende
- Computational and Bio-Simulation Research Group , University of Calabar , Calabar , Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences , University of Calabar , Calabar , Nigeria
| | - Hitler Louis
- Computational and Bio-Simulation Research Group , University of Calabar , Calabar , Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences , University of Calabar , Calabar , Nigeria
| | - Aniekan E. Owen
- Computational and Bio-Simulation Research Group , University of Calabar , Calabar , Nigeria
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group , University of Calabar , Calabar , Nigeria
- Department of Microbiology, Faculty of Biological Sciences , University of Calabar , Calabar , Nigeria
| | - Ismail O. Amodu
- Computational and Bio-Simulation Research Group , University of Calabar , Calabar , Nigeria
- Department of Mathematics, Faculty of Physical Sciences , University of Calabar , Calabar , Nigeria
| | - Terkumbur E. Gber
- Computational and Bio-Simulation Research Group , University of Calabar , Calabar , Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences , University of Calabar , Calabar , Nigeria
| | - Fredrick C. Asogwa
- Computational and Bio-Simulation Research Group , University of Calabar , Calabar , Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences , University of Calabar , Calabar , Nigeria
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28
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Louis H, Charlie DE, Amodu IO, Benjamin I, Gber TE, Agwamba EC, Adeyinka AS. Probing the Reactions of Thiourea (CH 4N 2S) with Metals (X = Au, Hf, Hg, Ir, Os, W, Pt, and Re) Anchored on Fullerene Surfaces (C 59X). ACS Omega 2022; 7:35118-35135. [PMID: 36211036 PMCID: PMC9535727 DOI: 10.1021/acsomega.2c04044] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 08/08/2022] [Indexed: 05/21/2023]
Abstract
Upon various investigations conducted in search for a nanosensor material with the best sensing performance, the need to explore these materials cannot be overemphasized as materials associated with best sensing attributes are of vast interest to researchers. Hence, there is a need to investigate the adsorption performances of various metal-doped fullerene surfaces: C59Au, C59Hf, C59Hg, C59Ir, C59Os, C59Pt, C59Re, and C59W on thiourea [SC(NH2)2] molecule using first-principles density functional theory computation. Comparative adsorption study has been carried out on various adsorption models of four functionals, M06-2X, M062X-D3, PBE0-D3, and ωB97XD, and two double-hybrid (DH) functionals, DSDPBEP86 and PBE0DH, as reference at Gen/def2svp/LanL2DZ. The visual study of weak interactions such as quantum theory of atoms in molecule analysis and noncovalent interaction analysis has been invoked to ascertain these results, and hence we arrived at a conclusive scientific report. In all cases, the weak adsorption observed is best described as physisorption phenomena, and CH4N2S@C59Pt complex exhibits better sensing attributes than its studied counterparts in the interactions between thiourea molecule and transition metal-doped fullerene surfaces. Also, in the comparative adsorption study, DH density functionals show better performance in estimating the adsorption energies due to their reduced mean absolute deviation (MAD) and root-mean-square deviation (RMSD) values of (MAD = 1.0305, RMSD = 1.6277) and (MAD = 0.9965, RMSD = 1.6101) in DSDPBEP86 and PBE0DH, respectively.
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Affiliation(s)
- Hitler Louis
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
- Department
of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar 540221, Nigeria
| | - Destiny E. Charlie
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
- Department
of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar 540221, Nigeria
| | - Ismail O. Amodu
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
- Department
of Mathematics, Faculty of Physical Sciences, University of Calabar, Calabar 540221, Nigeria
| | - Innocent Benjamin
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
| | - Terkumbur E. Gber
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
- Department
of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar 540221, Nigeria
| | - Ernest C. Agwamba
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar 540221, Nigeria
| | - Adedapo S. Adeyinka
- Department
of Chemical Sciences, University of Johannesburg, Johannesburg 2006, South Africa
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29
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Benjamin I, Udoikono AD, Louis H, Agwamba EC, Unimuke TO, Owen AE, Adeyinka AS. Antimalarial potential of naphthalene-sulfonic acid derivatives: Molecular electronic properties, vibrational assignments, and in-silico molecular docking studies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133298] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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Eno EA, Louis H, Ekoja P, Benjamin I, Adalikwu SS, Orosun MM, Unimuke TO, Asogwa FC, Agwamba EC. Experimental and computational modeling of the biological activity of benzaldehyde sulphur trioxide as a potential drug for the treatment of Alzheimer disease. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100532] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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31
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Eno EA, Mbonu JI, Louis H, Patrick-Inezi FS, Gber TE, Unimke TO, Okon EE, Benjamin I, Offiong OE. Antimicrobial activities of 1-phenyl-3-methyl-4-trichloroacetyl-pyrazolone: Experimental, DFT studies, and molecular docking investigation. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100524] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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32
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Gber TE, Louis H, Owen AE, Etinwa BE, Benjamin I, Asogwa FC, Orosun MM, Eno EA. Heteroatoms (Si, B, N, and P) doped 2D monolayer MoS 2 for NH 3 gas detection. RSC Adv 2022; 12:25992-26010. [PMID: 36199611 PMCID: PMC9468912 DOI: 10.1039/d2ra04028j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/29/2022] [Indexed: 11/21/2022] Open
Abstract
2D transition metal dichalcogenide MoS2 monolayer quantum dots (MoS2-QD) and their doped boron (B@MoS2-QD), nitrogen (N@MoS2-QD), phosphorus (P@MoS2-QD), and silicon (Si@MoS2-QD) surfaces have been theoretically investigated using density functional theory (DFT) computation to understand their mechanistic sensing ability, such as conductivity, selectivity, and sensitivity toward NH3 gas. The results from electronic properties showed that P@MoS2-QD had the lowest energy gap, which indicated an increase in electrical conductivity and better adsorption behavior. By carrying out comparative adsorption studies using m062-X, ωB97XD, B3LYP, and PBE0 methods at the 6-311G++(d,p) level of theory, the most negative values were observed from ωB97XD for the P@MoS2-QD surface, signifying the preferred chemisorption surface for NH3 detection. The mechanistic studies provided in this study also indicate that the P@MoS2-QD dopant is a promising sensing material for monitoring ammonia gas in the real world. We hope this research work will provide informative knowledge for experimental researchers to realize the potential of MoS2 dopants, specifically the P@MoS2-QD surface, as a promising candidate for sensors to detect gas. 2D transition metal dichalcogenide MoS2 monolayer quantum dots (MoS2-QD) and their doped boron (B@MoS2-QD), nitrogen (N@MoS2-QD), phosphorus (P@MoS2-QD), and silicon (Si@MoS2-QD) counterparts are proposed as selective sensors for NH3 gas.![]()
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Affiliation(s)
- Terkumbur E. Gber
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Chemistry, Akwa-Ibom State University, Uyo, Nigeria
| | - Aniekan E. Owen
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Chemistry, Akwa-Ibom State University, Uyo, Nigeria
| | - Benjamin E. Etinwa
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Innocent Benjamin
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Fredrick C. Asogwa
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | | | - Ededet A. Eno
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
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Abstract
Purpose: To compare lesion detection and characterisation predicted by MnDPDP-enhanced MR imaging with surgical excision and pathological examination. Material and Methods: Ninety patients were intravenously infused at a rate of 2 to 3 ml/min with 5 μmol/kg mangafodipir trisodium (MnDPDP, Teslascan). The patients were examined with spin-echo and gradient-echo T1-weighted MR imaging at 1 h and 24 h after the end of infusion. The results were compared with identical pre-contrast sequences. In 20 of these patients, the pre-operative MR findings were compared with intra-operative ultrasonography and histology of the resected liver specimens. Results: In those with liver metastases, there was a good correlation between MR and the hepatic disease in 11 out of 14 cases. In the group with primary liver tumours, MR findings correlated with hepatic disease in 5 out of 6 cases. Conclusion: Liver lesion characterisation is possible with MnDPDP, and MR contrast enhancement with this agent is considered to be an important adjunct to the radiological assessment of patients with neoplastic liver disease where accurate decisions for surgical planning are imperative.
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Affiliation(s)
- P A Kane
- Department of Radiology, Kings College Hospital, London, UK
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Marathe P, Thao M, Benjamin I. ID: 11: REDOX PROFILING OF CARVEDILOL AND PROPRANOLOL IN A HEART MODEL. J Investig Med 2016. [DOI: 10.1136/jim-2016-000120.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
IntroductionClinical trials have shown that carvedilol is highly effective against heart failure (HF). Carvedilol, unlike propranolol, has direct antioxidant effects and is capable of mitigating oxidative stress in HF patients. Moreover, it has been suggested that carvedilol has an indirect antioxidant mechanism that could involve the initial production of non-lethal levels of oxidative stress leading to the regulation of an uncharacterized antioxidant response that later counters oxidative stress.HypothesisWe hypothesized that carvedilol's indirect antioxidant mechanism may involve the nuclear factor erythroid 2-related factor 2 (Nrf2)/Kelch ECH associating protein 1 (Keap1) pathway, which is a major antioxidant pathway involved in cardiovascular, pulmonary, and neoplastic diseases.MethodsUsing H9C2 rat myoblasts, we confirmed the activation of the Nrf2/Keap1 pathway by detecting levels of downstream protein targets hemeoxygenase-1 (HO-1) and NAD(P)H: quinone oxidoreductase-1 (NQO-1). We transfected H9C2 cells with reductive-oxidative green fluorescent protein (roGFP) fused with human glutaredoxin 1 that targeted mitochondria or cytosol. Redox state changes were quantified by normalized roGFP intensity ratios measured using live-cell imaging.ResultsIn the short term, carvedilol oxidized both cellular compartments while propranolol did not. In the long term, carvedilol upregulated the production of HO-1 and NQO-1 while propranolol downregulated these antioxidant proteins. These results demonstrate that carvedilol's indirect antioxidant effect involves the Nrf2/Keap 1 pathway. This has strong implications as carvedilol is a commonly used, highly effective beta-blocker and elucidating its antioxidant mechanisms can potentially expand the use of carvedilol for the treatment of other diseases, inform the development of new therapeutics, and optimize HF treatment.
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Benjamin I, Dalton HJ, Monk BJ. Acquired drug resistance in gynecologic cancer detected by drug response marker testing. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.5068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Sánchez V, Urbina M, Villamediana P, Medina R, Benjamin I, Lerner J. A comparison of three different techniques to assess sperm DNA fragmentation. Fertil Steril 2008. [DOI: 10.1016/j.fertnstert.2008.07.1666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sanchez L, Centeno I, Benjamin I, Pérez M, Urbina M, Medina R. Increased ovarian volume (IOV) is a good predictor of insulin resistance in a Latino-American population of PCOS women. Fertil Steril 2008. [DOI: 10.1016/j.fertnstert.2008.07.385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Benjamin I, Medina R, Ibarra L, Centeno I, Urbina M, Díaz E. Fallopian tube sperm perfusion comparison between 4 ml and 10 ml of inseminate. Fertil Steril 2008. [DOI: 10.1016/j.fertnstert.2008.07.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Peceno A, Aller J, Brofenmajer S, Benjamin I, Lerner J, Pages G. P-785. Fertil Steril 2006. [DOI: 10.1016/j.fertnstert.2006.07.1171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Benjamin I, Wilson KR. Molecular dynamics simulation of spectral and dynamic solvent effects for electronic transitions of sodium iodide in argon. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100162a016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Pohorille A, Benjamin I. Structure and Energetics of model amphiphilic molecules at the water liquid-vapor interface. A molecular dynamics study. J Phys Chem 2001; 97:2664-70. [PMID: 11539476 DOI: 10.1021/j100113a030] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A molecular dynamics study of adsorption of p-n-pentylphenol at infinite dilution at the water liquid-vapor interface is reported. The calculated free energy of adsorption is -8.8 +/- 0.7 kcal/mol, in good agreement with the experimental value of -7.3 kcal/mol. The transition between the interfacial region and the bulk solution is sharp and well-defined by energetic, conformational, and orientational criteria. At the water surface, the phenol head group is mostly immersed in aqueous solvent. The most frequent orientation of the hydrocarbon tail is parallel to the interface, due to dispersion interactions with the water surface. This arrangement of the phenol ring and the alkyl chain requires that the chain exhibits a kink. As the polar head group is being moved into the solvent, the chain length increases and the tail becomes increasingly aligned toward the surface normal, such that the nonpolar part of the molecule exposed to water is minimized. The same effect was achieved when phenol was replaced by a more polar head group, phenolate. This result underscores the difference between hydrophobic hydration at the surface and in the bulk solvent, when nonpolar molecular fragments adopt compact conformations.
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Affiliation(s)
- A Pohorille
- Department of Pharmaceutical Chemistry, University of California, San Francisco 94143, USA
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Evans SM, Hahn S, Pook DR, Jenkins WT, Chalian AA, Zhang P, Stevens C, Weber R, Weinstein G, Benjamin I, Mirza N, Morgan M, Rubin S, McKenna WG, Lord EM, Koch CJ. Detection of hypoxia in human squamous cell carcinoma by EF5 binding. Cancer Res 2000; 60:2018-24. [PMID: 10766193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Localization and quantitation of 2-nitroimidazole drug binding in low pO2 tumors is a technique that can allow the assessment of hypoxia as a predictive assay. EF5 [2-(2-nitro-1H-imidazol-1-yl)-N-(2,2,3,3,3-pentafluoropropyl) acetamide] is such a drug, and it has been shown to be predictive of radiation response in rodent tumors. Using fluorescence immunohistochemical techniques, we provide data on the presence, distribution, and levels of EF5 binding as a surrogate for hypoxia in human head and neck and uterine cervix squamous cell cancers (SCCs). Six patients with SCC were studied. Four patients had head and neck tumors, and two had uterine cervix cancers. The incubation of fresh tissue cubes in EF3 under hypoxic conditions ("reference binding") demonstrated that all tumors were capable of binding drug, and that this binding varied by a factor of 2.9-fold (174.5-516.1) on an absolute fluorescence scale. In the five patients treated at the lowest drug doses (9 mg/kg), in situ binding was quantitatable. For all six patients, the maximum rate of in situ binding varied by a factor of 6.7 between the lowest and highest binding tumor (24.8-160.3) on an absolute fluorescence scale. In tumors with high binding regions, intratumoral heterogeneity was large, extending from minimal fluorescence (<1%) up to 88.6% of reference binding. In tumors with minimal binding, there was little intratumoral heterogeneity. These studies demonstrate substantial heterogeneity of in situ binding between and within individual squamous cell tumors.
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Affiliation(s)
- S M Evans
- School of Veterinary Medicine, University of Pennsylvania, Philadelphia 19104, USA.
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Coukos G, Makrigiannakis A, Montas S, Kaiser LR, Toyozumi T, Benjamin I, Albelda SM, Rubin SC, Molnar-Kimber KL. Multi-attenuated herpes simplex virus-1 mutant G207 exerts cytotoxicity against epithelial ovarian cancer but not normal mesothelium and is suitable for intraperitoneal oncolytic therapy. Cancer Gene Ther 2000; 7:275-83. [PMID: 10770637 DOI: 10.1038/sj.cgt.7700130] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Recombinant strains of herpes simplex virus-1 (HSV-1) harboring mutations in the infected cell product (ICP)34.5 region lose their neurovirulence and replicate more efficiently in dividing tumor cells than stationary cells, becoming replication-selective oncolytic agents. Additional mutation of the ICP6 gene, which encodes ribonucleotide reductase, further impairs the ability of HSV-1 mutants to replicate in normal cells, enhancing tumor selectivity. The present study investigated the effect of HSV-G207, a recombinant HSV-1 lacking ICP34.5 and ICP6, against epithelial ovarian cancer (EOC) in vitro and in vivo in a mouse xenograft model. To assess the selectivity of multimutated HSV-G207 against malignant cells, HSV-G207 and wild-type HSV-F were comparatively tested against normal human peritoneal mesothelial cells and EOC cells in vitro. HSV-G207 infected both EOC cells and mesothelial cells; however, unlike EOC cells, mesothelial cells provided a poor substrate for replication of HSV-G207. In contrast to wild-type HSV-F, HSV-G207 exerted a potent oncolytic effect on EOC cells but spared normal mesothelial cells in vitro. Primary EOC cells were more sensitive to the virus than established EOC cell lines. A single intraperitoneal injection of HSV-G207 resulted in a significant reduction in tumor volume and tumor spread in vivo. HSV-G207 was shown to penetrate deeply within tumor nodules and caused no apparent intraperitoneal toxicity. Oncolytic therapy with multimutated replication-restricted HSV may offer a novel approach in the treatment of EOC.
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MESH Headings
- Animals
- Carcinoma/pathology
- Carcinoma/therapy
- Carcinoma/virology
- Cell Transformation, Viral/genetics
- DNA, Recombinant/genetics
- DNA, Recombinant/metabolism
- DNA, Recombinant/therapeutic use
- DNA, Viral/genetics
- DNA, Viral/metabolism
- DNA, Viral/therapeutic use
- Epithelium/virology
- Female
- Herpesvirus 1, Human/genetics
- Herpesvirus 1, Human/pathogenicity
- Herpesvirus 1, Human/physiology
- Humans
- Infusions, Parenteral
- Mice
- Mice, SCID
- Mutation/genetics
- Ovarian Neoplasms/pathology
- Ovarian Neoplasms/therapy
- Ovarian Neoplasms/virology
- Tumor Cells, Cultured
- Virulence
- Virus Replication/genetics
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Affiliation(s)
- G Coukos
- Department of Obstetrics and Gynecology, University of Pennsylvania Medical Center, Philadelphia 19104, USA
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Coukos G, Makrigiannakis A, Chung J, Randall TC, Rubin SC, Benjamin I. Complete hydatidiform mole. A disease with a changing profile. J Reprod Med 1999; 44:698-704. [PMID: 10483540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
OBJECTIVE To retrospectively evaluate the clinical presentation of complete molar pregnancies in an academic primary obstetrics and gynecology practice over the past decade. STUDY DESIGN All cases of abnormal pregnancy presenting to our institution during the first half of gestation were identified through a computerized database. Clinical presentation and course of complete moles were analyzed. RESULTS Twenty-four complete molar pregnancies were identified among 2,431 abnormal early gestations (1%). The patients' mean age was 24.5 years, and the mean gestational age was 9.5 weeks of amenorrhea (range, 8-25). Seventy-five percent of the patients presented with vaginal bleeding and 54% with excessive uterine size. None had hyperemesis gravidarum, preeclampsia, clinical hyperthyroidism or ovarian enlargement. All patients had abnormally elevated serum beta-hCG. Transvaginal ultrasound was diagnostic in more than half the patients, while it was suggestive of the diagnosis in the remainder. One patient experienced postevacuation trophoblastic embolization and developed persistent gestational trophoblastic disease. CONCLUSION Due to the routine use of transvaginal ultrasound and serum beta-hCG in the workup of early gestational abnormalities, complete molar pregnancy rarely presents today with the traditional signs and symptoms. Despite their absence, the potential for persistent trophoblastic disease still exists, and careful follow-up is warranted.
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Affiliation(s)
- G Coukos
- Department of Obstetrics and Gynecology, University of Pennsylvania Medical Center, Philadelphia 19104, USA.
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Coukos G, Makrigiannakis A, Kang EH, Caparelli D, Benjamin I, Kaiser LR, Rubin SC, Albelda SM, Molnar-Kimber KL. Use of carrier cells to deliver a replication-selective herpes simplex virus-1 mutant for the intraperitoneal therapy of epithelial ovarian cancer. Clin Cancer Res 1999; 5:1523-37. [PMID: 10389942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
Epithelial ovarian cancer (EOC) remains localized within the peritoneal cavity in a large number of patients, lending itself to i.p. approaches of therapy. In the present study, we investigated the effect of replication-selective herpes simplex virus-1 (HSV-1) used as an oncolytic agent against EOC and the use of human teratocarcinoma PA-1 as carrier cells for i.p. therapy. HSV-1716, a replication-competent attenuated strain lacking ICP34.5, caused a direct dose-dependent oncolytic effect on EOC cells in vitro. A single i.p. administration of 5 x 10(6) plaque-forming units resulted in a significant reduction of tumor volume and tumor spread and an increase in survival in a mouse xenograft model. PA-1 cells supported HSV replication in vitro and bound preferentially to human ovarian carcinoma surfaces compared with mesothelial surfaces in vitro and in vivo. In comparison with the administration of HSV-1716 alone, irradiated PA-1 cells, infected at two multiplicities of infection with HSV-1716 and injected i.p. at 5 x 10(6) cells/animal, led to a significant tumor reduction in the two models tested and the significant prolongation of mean survival in one model. Histological evaluation revealed extensive necrosis in tumor areas infected by HSV-1716. Immunohistochemistry against HSV-1 revealed areas of viral infection within tumor nodules, which persisted for several weeks after treatment. Administration of HSV-infected PA-1 carrier cells resulted in larger areas of tumor infected by the virus. Our results indicate that replication-competent attenuated HSV-1 exerts a potent oncolytic effect on EOC, which may be further enhanced by the utilization of a delivery system with carrier cells, based on amplification of the viral load and possibly on preferential binding of carrier cells to tumor surfaces.
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Affiliation(s)
- G Coukos
- Department of Obstetrics and Gynecology, University of Pennsylvania Medical Center, Philadelphia 19104, USA
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Benjamin I, Nixon E. PR 1 The sealing ability of retrograde filling materials on a serum contaminated and noncontaminated surface: Spectrophotometric study. J Endod 1999. [DOI: 10.1016/s0099-2399(99)80225-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
OBJECTIVE The aim of this study was to determine the incidence of occult bilateral involvement in Stage I epithelial ovarian cancer. METHODS We retrospectively reviewed the records of all patients (n = 135) with Stage I epithelial ovarian cancer treated at the University of Pennsylvania Cancer Center between 1985 and 1996. A study group of patients (n = 118) who underwent a bilateral salpingo-oophorectomy as part of their staging laparotomy was identified. Operative notes, pathology reports, and discharge summaries were reviewed to document stage, grade, histology, intraoperative impression, gross pathological description, and microscopic diagnosis. Clinically occult bilateral involvement was defined as pathologically documented ovarian involvement by tumor in an ovary that appeared normal to the surgeon during staging laparotomy. RESULTS The study group consisted of mostly Stage IA (79/118, 67%), followed by Stage IC (35/118, 30%) and Stage IB (4/118, 3%), tumors. In 9/118 (7.6%) of these cases, bilateral disease was documented in the pathology report. In 3/118 (2.5%) of these cases, the bilateral involvement by tumor was clinically occult at the time of surgery. In only 1/118 (0.85%) of these cases did a clinically abnormal appearing ovary not contain tumor. CONCLUSION Occult involvement by early ovarian cancer is uncommon at the time of staging laparotomy. In appropriately counseled patients strongly desiring to preserve fertility, a unilateral salpingo-oophorectomy may be considered as part of a staging procedure for apparent Stage IA epithelial ovarian cancer if the contralateral ovary appears normal to the surgeon. Consideration should be given to a wedge biopsy with intraoperative frozen section to help exclude occult disease in the normal appearing ovary.
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Affiliation(s)
- I Benjamin
- Department of Obstetrics and Gynecology, University of Pennsylvania Health System, Philadelphia, Pennsylvania, 19104, USA
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