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Atif M, Husnain HU, Rehman AU, Younas U, Rafique T, Khalid W, Ali Z, Nadeem M. Enhancement in the dielectric and magnetic properties of Ni 2+-Cu 2+ co-doped BaFe 11Cu 1-xNi xO 19 hexaferrites (0.0 ≤ x ≤ 1.0). RSC Adv 2024; 14:6883-6895. [PMID: 38410360 PMCID: PMC10895416 DOI: 10.1039/d3ra06684c] [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: 10/01/2023] [Accepted: 02/13/2024] [Indexed: 02/28/2024] Open
Abstract
Herein, Ni2+-Cu2+ co-doped barium hexaferrites (BaFe11Cu1-xNixO19, 0.0 ≤ x≤ 1.0 with an interval of 0.25) were successfully synthesized using a co-precipitation method. The formation of a magnetoplumbite structure with the P63/mmc space group was confirmed by Rietveld refinement of the obtained X-ray diffraction patterns. Microstructural investigations revealed grains in the shape of hexagonal plates, while co-doping resulted in a variation in the grain sizes of the prepared samples. X-ray photoelectron spectroscopy was performed to determine the valence state of iron in the prepared hexaferrites. Impedance spectroscopy analysis revealed that dielectric permittivity initially decreased with an increase in the co-dopant content up to x = 0.5 and then increased by two orders of magnitude for x = 1.0. Alternatively, resistive properties showed microstructural resistance values in the range 105-108 Ω, with the highest value obtained for the sample with x = 0.5. Furthermore, magnetic measurements indicated that all the prepared samples exhibited ferrimagnetic behaviour. Saturation magnetization and magnetic anisotropy values were found to be the highest for the sample with x = 1.0, which also had the lowest coercivity among the prepared samples. Herein, the observed variations in the obtained results can be explained by the variations in grain sizes and the Fe2+/Fe3+ ratio associated with the preferential occupation of co-dopants at octahedral sites. Based on our findings, the BaFe11Ni1O19 (x = 1.0) composition appears to be the most promising choice as a microwave absorption material among the prepared samples owing to the coexistence of high dielectric permittivity (>103 at 107 Hz) and saturation magnetization (73 emu g-1).
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Affiliation(s)
- M Atif
- Functional Materials Lab, Department of Physics, Air University PAF Complex E-9 Islamabad Pakistan
| | - H Ul Husnain
- Functional Materials Lab, Department of Physics, Air University PAF Complex E-9 Islamabad Pakistan
| | - Atta Ur Rehman
- Functional Materials Lab, Department of Physics, Air University PAF Complex E-9 Islamabad Pakistan
- Department of Physics, The University of Hong Kong Pokfulam Hong Kong
| | - U Younas
- Functional Materials Lab, Department of Physics, Air University PAF Complex E-9 Islamabad Pakistan
| | - T Rafique
- Functional Materials Lab, Department of Physics, Air University PAF Complex E-9 Islamabad Pakistan
| | - W Khalid
- Functional Materials Lab, Department of Physics, Air University PAF Complex E-9 Islamabad Pakistan
| | - Z Ali
- Functional Materials Lab, Department of Physics, Air University PAF Complex E-9 Islamabad Pakistan
| | - M Nadeem
- Polymer Composite Group, Physics Division, Directorate of Science, PINSTECH P.O. Nilore Islamabad Pakistan
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Fakhar-E-Alam M, Akram MW, Iqbal S, Alimgeer KS, Atif M, Sultana K, Willander M, Wang ZM. Retraction Note: Empirical Modeling of Physiochemical Immune Response of Multilayer Zinc Oxide Nanomaterials under UV Exposure to Melanoma and Foreskin Fibroblasts. Sci Rep 2023; 13:12912. [PMID: 37558777 PMCID: PMC10412606 DOI: 10.1038/s41598-023-40251-0] [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: 08/11/2023] Open
Affiliation(s)
- Muhammad Fakhar-E-Alam
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, 610054, Chengdu, China
- Department of Science and Technology, Campus Norrköping, Linköping University, SE-601 74, Norrköping, Sweden
- Department of Physics, GC University, 38000, Faisalabad, Pakistan
| | - M Waseem Akram
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, 610054, Chengdu, China.
| | - Seemab Iqbal
- Department of Physics, GC University, 38000, Faisalabad, Pakistan
| | - K S Alimgeer
- COMSATS Institute of Information Technology, Islamabad, Pakistan
| | - M Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, Saudi Arabia
- National Institute of Laser and Optronics, Nilore, Islamabad, Pakistan
| | - K Sultana
- Department of Science and Technology, Campus Norrköping, Linköping University, SE-601 74, Norrköping, Sweden
| | - M Willander
- Department of Science and Technology, Campus Norrköping, Linköping University, SE-601 74, Norrköping, Sweden
| | - Zhiming M Wang
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, 610054, Chengdu, China
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Akram MW, Fakhar-E-Alam M, Atif M, Butt AR, Asghar A, Jamil Y, Alimgeer KS, Wang ZM. Retraction Note: In vitro evaluation of the toxic effects of MgO nanostructure in Hela cell line. Sci Rep 2023; 13:12913. [PMID: 37558745 PMCID: PMC10412612 DOI: 10.1038/s41598-023-40237-y] [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: 08/11/2023] Open
Affiliation(s)
- M Waseem Akram
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu, 610054, China.
| | - Muhammad Fakhar-E-Alam
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu, 610054, China
- Department of Physics, Government College University, Faisalabad, 38000, Pakistan
| | - M Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, Saudi Arabia.
- National Institute of Laser and Optronics, Nilore, Islamabad, Pakistan.
| | | | - Ali Asghar
- Department of Mathematics and Statistics, University of Lahore, Lahore, Pakistan
| | - Yasir Jamil
- Laser Spectroscopy Lab., Department of Physics, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - K S Alimgeer
- COMSATS Institute of Information Technology, Islamabad, Pakistan
| | - Zhiming M Wang
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu, 610054, China.
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Pinares-Garcia P, Spyrou J, McKenzie CE, Forster IC, Soh MS, Mohamed Syazwan E, Atif M, Reid CA. Antidepressant-like activity of a brain penetrant HCN channel inhibitor in mice. Front Pharmacol 2023; 14:1159527. [PMID: 37234718 PMCID: PMC10206048 DOI: 10.3389/fphar.2023.1159527] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 04/27/2023] [Indexed: 05/28/2023] Open
Abstract
Changes in Hyperpolarization-Activated Cyclic Nucleotide-Gated (HCN) channel function have been linked to depressive-like traits, making them potential drug targets. However, there is currently no peer-reviewed data supporting the use of a small molecule modulator of HCN channels in depression treatment. Org 34167, a benzisoxazole derivative, has been patented for the treatment of depression and progressed to Phase I trials. In the current study, we analysed the biophysical effects of Org 34167 on HCN channels in stably transfected human embryonic kidney 293 (HEK293) cells and mouse layer V neurons using patch-clamp electrophysiology, and we utilised three high-throughput screens for depressive-like behaviour to assess the activity of Org 34167 in mice. The impact of Org 34167 on locomotion and coordination were measured by performing rotarod and ledged beam tests. Org 34167 is a broad-spectrum inhibitor of HCN channels, slowing activation and causing a hyperpolarising shift in voltage-dependence of activation. It also reduced I h-mediated sag in mouse neurons. Org 34167 (0.5 mg/kg) reduced marble burying and increased the time spent mobile in the Porsolt swim and tail suspension tests in both male and female BALB/c mice, suggesting reduced depressive-like behaviour. Although no adverse effects were seen at 0.5 mg/kg, an increase in dose to 1 mg/kg resulted in visible tremors and impaired locomotion and coordination. These data support the premise that HCN channels are valid targets for anti-depressive drugs albeit with a narrow therapeutic index. Drugs with higher HCN subtype selectivity are needed to establish if a wider therapeutic window can be obtained.
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Affiliation(s)
- Paulo Pinares-Garcia
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - James Spyrou
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Chaseley E. McKenzie
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Ian C. Forster
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Ming S. Soh
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Erlina Mohamed Syazwan
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Mohammed Atif
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Christopher A. Reid
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
- Epilepsy Research Centre, Department of Medicine, University of Melbourne, Heidelberg, VIC, Australia
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Younas U, Atif M, Anjum A, Nadeem M, Ali T, Shaheen R, Khalid W, Ali Z. Fabrication of La 3+ doped Ba 1-x La x TiO 3 ceramics with improved dielectric and ferroelectric properties using a composite-hydroxide-mediated method. RSC Adv 2023; 13:5293-5306. [PMID: 36777949 PMCID: PMC9912143 DOI: 10.1039/d2ra06640h] [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: 10/20/2022] [Accepted: 02/05/2023] [Indexed: 02/12/2023] Open
Abstract
Lanthanum (La3+) doped Ba1-x La x TiO3 (x = 0.0, 0.0025, 0.005, 0.0075) ceramics were synthesized by the composite-hydroxide-mediated method. Rietveld refinement of the XRD patterns confirmed the formation of a perovskite crystal structure that transforms from tetragonal to pseudo-cubic with La3+ doping content (x). Scanning electron microscopy displayed a dense and homogeneous microstructure with reduced grain size on La3+ doping. The frequency and temperature-dependent dielectric measurements showed an improvement in the dielectric permittivity, a decrease in the ferroelectric-paraelectric transition temperature, and an increase in the dielectric diffusivity with increasing La3+ doping content. Complex impedance analysis indicated the semiconducting behavior with a positive temperature coefficient of resistance effect, which could be explained in terms of a charge compensation mechanism in the donor doped BaTiO3. The ferroelectric hysteresis loops revealed that these ceramics are ferroelectric in nature, while an improvement in the energy storage density and energy storage efficiency was observed for the doped samples due to reduced grain size on La3+ doping. Here, the sample with x = 0.005 has a high dielectric permittivity, a low dielectric tangent loss, and the highest energy storage efficiency. This makes this composition interesting for energy storage applications.
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Affiliation(s)
- U. Younas
- Functional Materials Lab, Department of Physics, Air UniversityPAF Complex E-9IslamabadPakistan
| | - M. Atif
- Functional Materials Lab, Department of Physics, Air UniversityPAF Complex E-9IslamabadPakistan
| | - A. Anjum
- Functional Materials Lab, Department of Physics, Air UniversityPAF Complex E-9IslamabadPakistan
| | - M. Nadeem
- Polymer Composite Group, Directorate of SciencePINSTECHIslamabadPakistan
| | - T. Ali
- Physics Division, Directorate of SciencePINSTECHIslamabadPakistan
| | - R. Shaheen
- Physics Division, Directorate of SciencePINSTECHIslamabadPakistan
| | - W. Khalid
- Functional Materials Lab, Department of Physics, Air UniversityPAF Complex E-9IslamabadPakistan
| | - Z. Ali
- Functional Materials Lab, Department of Physics, Air UniversityPAF Complex E-9IslamabadPakistan
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Amritha R, Rahul M, Tewari N, Atif M, Mathur V. Critical analysis of the article titled, "Dental trauma splints for the mixed dentition- A finite element analysis of splint material, splint extension, missing teeth and PDL representation". Dent Traumatol 2023; 39:95-96. [PMID: 36226919 DOI: 10.1111/edt.12796] [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] [Received: 09/21/2022] [Revised: 09/28/2022] [Accepted: 09/28/2022] [Indexed: 01/14/2023]
Affiliation(s)
- Rajeswary Amritha
- Division of Pedodontics and Preventive Dentistry, Centre for Dental Education and Research, AIIMS, New Delhi, India
| | - Morankar Rahul
- Division of Pedodontics and Preventive Dentistry, Centre for Dental Education and Research, AIIMS, New Delhi, India
| | - Nitesh Tewari
- Division of Pedodontics and Preventive Dentistry, Centre for Dental Education and Research, AIIMS, New Delhi, India
| | - Mohammed Atif
- Division of Pedodontics and Preventive Dentistry, Centre for Dental Education and Research, AIIMS, New Delhi, India
| | - Vijay Mathur
- Division of Pedodontics and Preventive Dentistry, Centre for Dental Education and Research, AIIMS, New Delhi, India
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Sultana R, Abid OUR, Sultana N, Fakhar-e-Alam M, Siddique MH, Atif M, Nawaz M, Wadood A, Rehman AU, Farooq W, Shafeeq S, Afzal M. Potential Enzyme Inhibitor Triazoles from Aliphatic esters: Synthesis, enzyme inhibition and docking studies. Journal of Saudi Chemical Society 2022. [DOI: 10.1016/j.jscs.2022.101565] [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: 11/05/2022]
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Hussnain Siddique M, Andleeb R, Ashraf A, Zubair M, Fakhar-e-Alam M, Hayat S, Muzammil S, Atif M, Shafeeq S, Afzal M. Integration of in silicoand in vitroapproaches to evaluate antioxidant and anticancer properties of Tribulus terrestris extracts. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.103984] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Rehman AU, Atif M, Younas M, Rafique T, Wahab H, Ul-Hamid A, Iqbal N, Ali Z, Khalid W, Nadeem M. Unusual semiconductor-metal-semiconductor transitions in magnetite Fe 3O 4 nanoparticles. RSC Adv 2022; 12:12344-12354. [PMID: 35480359 PMCID: PMC9036052 DOI: 10.1039/d2ra00530a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 01/25/2022] [Accepted: 04/19/2022] [Indexed: 01/14/2023] Open
Abstract
Magnetite (Fe3O4) nanoparticles were successfully prepared by a co-precipitation method. Rietveld refinement on the X-ray diffraction pattern confirmed the development of a single-phase cubic spinel structure with space group Fd3̄m. However, 57Fe Mössbauer spectroscopy suggested the presence of Fe3+ and Fe2.5+ (mixed Fe3+ and Fe2+) ions at the tetrahedral and octahedral sites of the inverse spinel structure, respectively. Impedance spectroscopy measurements showed a discontinues variation in the temperature dependence of the sample's resistive behavior, indicating the appearance of semiconductor–metal–semiconductor like transitions between the temperature range of 293 and 373 K. A similar dual transition was also observed from the dielectric and conductivity measurements around the same temperature regions. The observed unusual transition is explained in term of the competitive effects among the hopping of localized/delocalized and short-range/long-range charge carriers present in the sample. Moreover, the prepared sample exhibits colossal dielectric permittivity (∼106), reduced tangent loss (∼0.2) and moderate conductivity (>10−6 S cm−1) values, making Fe3O4 nanoparticles a potential candidate for electromagnetic absorbing materials. Herein, we report the existence of a novel semiconductor–metal–semiconductor type transition in Fe3O4 nanoparticles by employing impedance spectroscopy techniques.![]()
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Affiliation(s)
- Atta Ur Rehman
- Functional Materials Lab, Department of Physics, Air University PAF Complex E-9 Islamabad Pakistan
| | - M Atif
- Functional Materials Lab, Department of Physics, Air University PAF Complex E-9 Islamabad Pakistan
| | - M Younas
- Polymer Composite Group, Physics Division, Directorate of Science, PINSTECH P.O. Nilore Islamabad Pakistan
| | - T Rafique
- Functional Materials Lab, Department of Physics, Air University PAF Complex E-9 Islamabad Pakistan
| | - H Wahab
- Polymer Composite Group, Physics Division, Directorate of Science, PINSTECH P.O. Nilore Islamabad Pakistan
| | - A Ul-Hamid
- Core Research Facilities, King Fahd University of Petroleum & Minerals Dhahran 31261 Saudi Arabia
| | - N Iqbal
- US-Pakistan Centre for Advanced Studies in Energy (USPCAS-E), NUST H-12 Islamabad 44000 Pakistan
| | - Z Ali
- Functional Materials Lab, Department of Physics, Air University PAF Complex E-9 Islamabad Pakistan
| | - W Khalid
- Functional Materials Lab, Department of Physics, Air University PAF Complex E-9 Islamabad Pakistan
| | - M Nadeem
- Polymer Composite Group, Physics Division, Directorate of Science, PINSTECH P.O. Nilore Islamabad Pakistan
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Atif M, Raghuthaman S, Tewari N, Mathur VP, Rahul M. Letter to the editor related to recently published systematic review "What is the best long term treatment modality for immature permanent teeth with pulp necrosis and apical periodontitis?". Eur Arch Paediatr Dent 2022; 23:499-500. [PMID: 35298830 DOI: 10.1007/s40368-022-00704-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 03/10/2022] [Indexed: 11/27/2022]
Affiliation(s)
- M Atif
- Pediatric and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - S Raghuthaman
- Pediatric and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - N Tewari
- Pediatric and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, 110029, India.
| | - V P Mathur
- Pediatric and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - M Rahul
- Pediatric and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, 110029, India
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Ahmad M, Hameed Y, Khan M, Usman M, Rehman A, Abid U, Asif R, Ahmed H, Hussain MS, Rehman JU, Asif HM, Arshad R, Atif M, Hadi A, Sarfraz U, Khurshid U. Up-regulation of GINS1 highlighted a good diagnostic and prognostic potential of survival in three different subtypes of human cancer. BRAZ J BIOL 2021; 84:e250575. [PMID: 34852135 DOI: 10.1590/1519-6984.250575] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 07/30/2021] [Indexed: 12/13/2022] Open
Abstract
Cancer is a fatal malignancy and its increasing worldwide prevalence demands the discovery of more sensitive and reliable molecular biomarkers. To investigate the GINS1 expression level and its prognostic value in distinct human cancers using a series of multi-layered in silico approach may help to establish it as a potential shared diagnostic and prognostic biomarker of different cancer subtypes. The GINS1 mRNA, protein expression, and promoter methylation were analyzed using UALCAN and Human Protein Atlas (HPA), while mRNA expression was further validated via GENT2. The potential prognostic values of GINS1 were evaluated through KM plotter. Then, cBioPortal was utilized to examine the GINS1-related genetic mutations and copy number variations (CNVs), while pathway enrichment analysis was performed using DAVID. Moreover, a correlational analysis between GINS1 expression and CD8+ T immune cells and a the construction of gene-drug interaction network was performed using TIMER, CDT, and Cytoscape. The GINS1 was found down-regulated in a single subtypes of human cancer while commonly up-regulated in 23 different other subtypes. The up-regulation of GINS1 was significantly correlated with the poor overall survival (OS) of Liver Hepatocellular Carcinoma (LIHC), Lung Adenocarcinoma (LUAD), and Kidney renal clear cell carcinoma (KIRC). The GINS1 was also found up-regulated in LIHC, LUAD, and KIRC patients of different clinicopathological features. Pathways enrichment analysis revealed the involvement of GINS1 in two diverse pathways, while few interesting correlations were also documented between GINS1 expression and its promoter methylation level, CD8+ T immune cells level, and CNVs. Moreover, we also predicted few drugs that could be used in the treatment of LIHC, LUAD, and KIRC by regulating the GINS1 expression. The expression profiling of GINS1 in the current study has suggested it a novel shared diagnostic and prognostic biomarker of LIHC, LUAD, and KIRC.
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Affiliation(s)
- M Ahmad
- The Islamia University of Bahawalpur, Department of Biochemistry and Biotechnology, Bahawalpur, Pakistan
| | - Y Hameed
- The Islamia University of Bahawalpur, Department of Biochemistry and Biotechnology, Bahawalpur, Pakistan
| | - M Khan
- The Islamia University of Bahawalpur, Department of Pharmacy, Bahawalpur, Pakistan
| | - M Usman
- The Islamia University of Bahawalpur, Department of Biochemistry and Biotechnology, Bahawalpur, Pakistan
| | - A Rehman
- Qarshi University, Department of Eastern Medicine, Lahore, Pakistan
| | - U Abid
- Bahauddin Zakariya University, Department of Pharmaceutics, Multan, Pakistan
| | - R Asif
- Government College University Faisalabad, Department of Microbiology, Faisalabad, Pakistan
| | - H Ahmed
- Government College University Faisalabad, Department of Eastern Medicine, Faisalabad, Pakistan
| | - M S Hussain
- The Islamia University of Bahawalpur, Department of Biochemistry and Biotechnology, Bahawalpur, Pakistan
| | - J U Rehman
- The Islamia University of Bahawalpur, College of Conventional Medicine, Faculty of Pharmacy and Alternative Medicine, Bahawalpur, Pakistan
| | - H M Asif
- The Islamia University of Bahawalpur, College of Conventional Medicine, Faculty of Pharmacy and Alternative Medicine, Bahawalpur, Pakistan
| | - R Arshad
- The Islamia University of Bahawalpur, College of Conventional Medicine, Faculty of Pharmacy and Alternative Medicine, Bahawalpur, Pakistan
| | - M Atif
- The Islamia University of Bahawalpur, College of Conventional Medicine, Faculty of Pharmacy and Alternative Medicine, Bahawalpur, Pakistan
| | - A Hadi
- The Islamia University of Bahawalpur, Department of Biochemistry and Biotechnology, Bahawalpur, Pakistan
| | - U Sarfraz
- COMSATS University Islamabad, Department of Biosciences, Islamabad, Pakistan
| | - U Khurshid
- The Islamia University of Bahawalpur, Department of Pharmacy, Bahawalpur, Pakistan
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Fakhar-e-Alam M, Shafiq Z, Mahmood A, Atif M, Anwar H, Hanif A, Yaqub N, Farooq W, Fatehmulla A, Ahmad S, Abd Elgawad AEE, Alimgeer K, Gia TN, Ahmed H. Assessment of green and chemically synthesized copper oxide nanoparticles against hepatocellular carcinoma. Journal of King Saud University - Science 2021; 33:101669. [DOI: 10.1016/j.jksus.2021.101669] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Dilshad S, Singh N, Atif M, Hanif A, Yaqub N, Farooq WA, Ahmad H, Chu YM, Masood MT. Automated image classification of chest X-rays of COVID-19 using deep transfer learning. Results Phys 2021; 28:104529. [PMID: 34395185 PMCID: PMC8355603 DOI: 10.1016/j.rinp.2021.104529] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 07/04/2021] [Accepted: 07/05/2021] [Indexed: 06/13/2023]
Abstract
INTRODUCTION In December 2019, the city of Wuhan, located in the Hubei province of China became the epicentre of an outbreak of a pandemic called COVID-19 by the World Health Organisation. The detection of this virus by rRTPCR (Real-Time Reverse Transcription-Polymerase Chain Reaction) tests reported high false negative rate. The manifestations of CXR (Chest X-Ray) images contained salient features of the virus. The objective of this paper is to establish the application of an early automated screening model that uses low computational power coupled with raw radiology images to assist the physicians and radiologists in the early detection and isolation of potential positive COVID-19 patients, to stop the rapid spread of the virus in vulnerable countries with limited hospital capacities and low doctor to patient ratio in order to prevent the escalating death rates. MATERIALS AND METHODS Our database consists of 447 and 447 CXR images of COVID-19 and Nofindings respectively, a total of 894 CXR images. They were then divided into 4 parts namely training, validation, testing and local/Aligarh dataset. The 4th (local/Aligarh) folder of the dataset was created to retest the diagnostics efficacy of our model on a developing nation such as India (Images from J.N.M.C., Aligarh, Uttar Pradesh, India). We used an Artificial Intelligence technique called CNN (Convolutional Neural Network). The architecture based on CNN used was MobileNet. MobileNet makes it faster than the ordinary convolutional model, while substantially decreasing the computational cost. RESULTS The experimental results of our model show an accuracy of 96.33%. The F1-score is 93% and 96% for the 1st testing and 2nd testing (local/Aligarh) datasets (Tables 3.3 and 3.4). The false negative (FN) value, for the validation dataset is 6 (Fig. 3.6), for the testing dataset is 0 (Fig. 3.7) and that for the local/Aligarh dataset is 2 . The recall/sensitivity of the classifier is 93% and 96% for the 1st testing and 2nd testing (local/Aligarh) datasets (Tables 3.3 and 3.4). The recall/sensitivity for the detection of specifically COVID-19 (+) for the testing dataset is 88% and for the locally acquired dataset from India is 100%. The False Negative Rate (FNR) is 12% for the testing dataset and 0% for the locally acquired dataset (local/Aligarh). The execution time for the model to predict the input images and classify them is less than 0.1 s. DISCUSSION AND CONCLUSION The false negative rate is much lower than the standard rRT-PCR tests and even 0% on the locally acquired dataset. This suggests that the established model with end-to-end structure and deep learning technique can be employed to assist radiologists in validating their initial screenings of Chest X-Ray images of COVID-19 in developed and developing nations. Further research is needed to test the model to make it more robust, employ it on multiclass classification and also try sensitise it to identify new strains of COVID-19. This model might help cultivate tele-radiology.
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Affiliation(s)
- Sara Dilshad
- Department of Statistics and Operations Research, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Nikhil Singh
- Department of Statistics and Operations Research, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - M Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Atif Hanif
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Nafeesah Yaqub
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - W A Farooq
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Hijaz Ahmad
- Section of Mathematics, International Telematic University Uninettuno, Corso Vittorio Emanuele II, 39, Roma 00186, Italy
| | - Yu-Ming Chu
- Department of Mathematics, Huzhou University, Huzhou 313000, China
- Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering Changsha, University of Science & Technology, Changsha 410114, China
| | - Muhammad Tamoor Masood
- Institute for Materials Research and Innovation, University of Bolton, Bolton, United Kingdom
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Javeed S, Anjum S, Alimgeer KS, Atif M, Khan MS, Farooq WA, Hanif A, Ahmad H, Yao SW. A novel mathematical model for COVID-19 with remedial strategies. Results Phys 2021; 27:104248. [PMID: 33996398 PMCID: PMC8106240 DOI: 10.1016/j.rinp.2021.104248] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 04/20/2021] [Accepted: 04/22/2021] [Indexed: 06/12/2023]
Abstract
Coronavirus (COVID-19) outbreak from Wuhan, Hubei province in China and spread out all over the World. In this work, a new mathematical model is proposed. The model consists the system of ODEs. The developed model describes the transmission pathways by employing non constant transmission rates with respect to the conditions of environment and epidemiology. There are many mathematical models purposed by many scientists. In this model, "α E " and "α I ", transmission coefficients of the exposed cases to susceptible and infectious cases to susceptible respectively, are included. " δ " as a governmental action and restriction against the spread of coronavirus is also introduced. The RK method of order four (RK4) is employed to solve the model equations. The results are presented for four countries i.e., Pakistan, Italy, Japan, and Spain etc. The parametric study is also performed to validate the proposed model.
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Affiliation(s)
- Shumaila Javeed
- Department of Mathematics, COMSATS University Islamabad, Park Road, Chak Shahzad Islamabad, Pakistan
| | - Subtain Anjum
- Department of Mathematics, COMSATS University Islamabad, Park Road, Chak Shahzad Islamabad, Pakistan
| | - Khurram Saleem Alimgeer
- Electrical and Computer Engineering Department, COMSATS University Islamabad, Islamabad Campus, Pakistan
| | - M Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mansoor Shaukat Khan
- Department of Mathematics, COMSATS University Islamabad, Park Road, Chak Shahzad Islamabad, Pakistan
| | - W Aslam Farooq
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Atif Hanif
- Botany and Microbiology Department, King Saud University, Riyadh 11451, Saudi Arabia
| | - Hijaz Ahmad
- Department of Basic Sciences, University of Engineering and Technology, Peshawar 25000, Pakistan
- Section of Mathematics, International Telematic University Uninettuno, Corso Vittorio Emanuele II, 39, 00186 Roma, Italy
| | - Shao-Wen Yao
- School of Mathematics and Information Science, Henan Polytechnic University, Jiaozuo 454000, China
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Iqbal S, Fakhar-E-Alam M, Alimgeer KS, Atif M, Hanif A, Yaqub N, Farooq WA, Ahmad S, Chu YM, Suleman Rana M, Fatehmulla A, Ahmad H. Mathematical modeling and experimental analysis of the efficacy of photodynamic therapy in conjunction with photo thermal therapy and PEG-coated Au-doped TiO 2 nanostructures to target MCF-7 cancerous cells. Saudi J Biol Sci 2021; 28:1226-1232. [PMID: 33613051 PMCID: PMC7878829 DOI: 10.1016/j.sjbs.2020.11.086] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 11/25/2020] [Accepted: 11/30/2020] [Indexed: 12/12/2022] Open
Abstract
Some nanoscale morphologies of titanium oxide nanostructures blend with gold nanoparticles and act as satellites and targeted weapon methodologies in biomedical applications. Simultaneously, titanium oxide can play an important role when combined with gold after blending with polyethylene glycol (PEG). Our experimental approach is novel with respect to the plasmonic role of metal nanoparticles as an efficient PDT drug. The current experimental strategy floats the comprehensive and facile way of experimental strategy on the critical influence that titanium with gold nanoparticles used as novel photosensitizing agents after significant biodistribution of proposed nanostructures toward targeted site. In addition, different morphologies of PEG-coated Au-doped titanium nanostructures were shown to provide various therapeutic effects due to a wide range of electromagnetic field development. This confirms a significantly amplified population of hot electron generation adjacent to the interface between Au and TiO2 nanostructures, leading to maximum cancerous cell injury in the MCF-7 cell line. The experimental results were confirmed by applying a least squares fit math model which verified our results with 99% goodness of fit. These results can pave the way for comprehensive rational designs for satisfactory response of performance phototherapeutic model mechanisms along with new horizons of photothermal therapy (HET) and photodynamic therapy (HET) operating under visible and near-infrared (NIR) light.
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Affiliation(s)
- Seemab Iqbal
- Department of Physics Govt. College University, 38000, Faisalabad, Pakistan
| | - M Fakhar-E-Alam
- Department of Physics Govt. College University, 38000, Faisalabad, Pakistan
| | - K S Alimgeer
- Department of Electrical and Computer Engineering, COMSATS University, Islamabad, Islamabad campus, Pakistan
| | - M Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Atif Hanif
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Nafeesah Yaqub
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - W A Farooq
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Shafiq Ahmad
- Industrial Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
| | - Yu-Ming Chu
- Department of Mathematics, Huzhou University, Huzhou 313000, China.,Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering, Changasha, University of Science & Technology, Changsha 410114, China
| | | | - Amanullah Fatehmulla
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Hijaz Ahmad
- Department of Basic Sciences, University of Engineering and Technology, Peshawar 25000, Pakistan.,Section of Mathematics, International Telematic University Uninettuno, Corso Vittorio Emanuele II, 39, 00186 Roma, Italy
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16
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Atif M, Iqbal S, Fakhar-E-Alam M, Mansoor Q, Alimgeer KS, Fatehmulla A, Hanif A, Yaqub N, Farooq WA, Ahmad S, Ahmad H, Chu YM. Manganese-doped cerium oxide nanocomposite as a therapeutic agent for MCF-7 adenocarcinoma cell line. Saudi J Biol Sci 2020; 28:1233-1238. [PMID: 33613052 PMCID: PMC7878823 DOI: 10.1016/j.sjbs.2020.12.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/05/2020] [Accepted: 12/06/2020] [Indexed: 12/20/2022] Open
Abstract
The preparation of a manganese-doped cerium oxide (Mn:CeO2) nanocomposite via hydrothermal route is described. Cubic fluorite structure of single phase was exhibited by studying structural analysis through x-ray diffraction (XRD) technique and morphological analysis was conducted by scanning electron microscope. Surface analytic technique of energy dispersive x-ray spectroscopy (EDX) was conducted to analyze the relative amount of any impurity and doping. Structural changes due to manganese doping such as increment in production of vacancies of oxygen within crystal of cerium oxide, and reduction in size of crystallite and constant of lattice was observed in our research study. Moreover, the Mn:CeO2 nanocomposite demonstrates differential cytotoxicity against MCF-7 adenocarcinoma cell line, which renders it a promising candidate for targeted cancer therapy. The anti-tumorous activity of the cerium oxide nanocomposite was significantly enhanced with doping of manganese, which is directly linked with the generation of highly reactive oxygen facets. The experimental results are supported by a mathematical model that confirms a confidence level of 95%. This research has paved the way for many utilities in therapeutics and magnetic resonance imaging diagnostics through new observations, and hence verified their math model.
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Affiliation(s)
- M Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Seemab Iqbal
- Department of Physics, GC University, Faisalabad 38000 Pakistan
| | - M Fakhar-E-Alam
- Department of Physics, GC University, Faisalabad 38000 Pakistan
| | - Qaisar Mansoor
- Institute of Biomedical and Genetic Engineering, Islamabad, Pakistan
| | - K S Alimgeer
- Department of Electrical and Computer Engineering, COMSATS University, Islamabad, Islamabad campus, Pakistan
| | - Amanullah Fatehmulla
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Atif Hanif
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Nafeesah Yaqub
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - W A Farooq
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Shafiq Ahmad
- Industrial Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
| | - Hijaz Ahmad
- Department of Basic Sciences, University of Engineering and Technology, Peshawar 25000, Pakistan.,Section of Mathematics, International Telematic University Uninettuno, Corso Vittorio Emanuele II, 39, 00186 Roma, Italy
| | - Yu-Ming Chu
- Department of Mathematics, Huzhou University, Huzhou 313000, China.,Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering, Changasha, University of Science & Technology, Changsha 410114, China
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Fakhar-e-Alam M, Aqrab-ul-Ahmad, Atif M, Alimgeer K, Suleman Rana M, Yaqub N, Aslam Farooq W, Ahmad H. Synergistic effect of TEMPO-coated TiO 2 nanorods for PDT applications in MCF-7 cell line model. Saudi J Biol Sci 2020; 27:3199-3207. [PMID: 33304125 PMCID: PMC7715424 DOI: 10.1016/j.sjbs.2020.09.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/07/2020] [Accepted: 09/13/2020] [Indexed: 01/10/2023] Open
Abstract
This study focuses on the synthesis, characterization, and assessment of the synergistic effect of 2,2,6,6, tetramethylpiperidine-N-oxyl (TEMPO)-coated titanium dioxide nanorods (TiO2 NRs) for photodynamic therapy (PDT). Firstly, TiO2 NRs were synthesized by the sol-gel technique. Then, TEMPO was grafted on TiO2 NRs with the aid of oxoammonium salts. Next, the final product was characterized by applying manifold characterization techniques. X-ray diffraction was used to perform crystallographic analysis; transmission electron microscopy (TEM) was used to conduct morphological analysis; Fourier transform infrared (FTIR) and Raman spectra were recorded to perform molecular fingerprint analysis. Furthermore, experimental and empirical modeling was performed to confirm the suitability of as-prepared samples for PDT applications using (MCF-7 cell line) Human Breast Cancer cell line. Our results revealed that bare TiO2 NRs did not exhibit a significant response for therapeutic applications compared to TEMPO-conjugated TiO2 NRs in the dark; however, they exhibited a prominent response for the PDT application under UV-A light. Therefore, it is concluded that TEMPO-coated TiO2 NRs shows the synergistic response for therapeutic approach under UV-A light irradiation. In addition, TEMPO capped TiO2 nanorods not only overcome the multidrug resistance (MDR) hindrance but also exhibit excellent response for cancer cell (MCF-7 cells) treatment only under UV light irradiation via PDT. It is expected that the proposed TiO2 NRs + TEMPO nanocomposite, which is suitable for PDT treatment, may be essential for photodynamic therapy.
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Affiliation(s)
- M. Fakhar-e-Alam
- Department of Physics, GC University, 38000 Faisalabad, Pakistan
| | - Aqrab-ul-Ahmad
- School of Physics and School of Microelectronics Dalian University of Technology, Dalian 116024, China
| | - M. Atif
- Deprtment of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - K.S. Alimgeer
- Department of Electrical Engineering, COMSATS University, Islamabad, Pakistan
| | | | - Nafeesah Yaqub
- Deprtment of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - W. Aslam Farooq
- Deprtment of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Hijaz Ahmad
- Department of Basic Sciences, University of Engineering and Technology, Peshawar 25000, Pakistan
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Sessa A, Mazzola A, Lim C, Atif M, Pappatella J, Pourcher V, Scatton O, Conti F. COVID-19 in a liver transplant recipient: Could iatrogenic immunosuppression have prevented severe pneumonia? A case report. World J Gastroenterol 2020; 26:7076-7084. [PMID: 33311951 PMCID: PMC7701943 DOI: 10.3748/wjg.v26.i44.7076] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 05/22/2020] [Accepted: 10/26/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Coronavirus disease (COVID) is a new and highly contagious infectious disease caused by the coronavirus (COVID-19 or severe acute respiratory syndrome coronavirus 2). There is limited data regarding the incidence and management of COVID-19 in immunocompromised patients' post-transplantation. In the pre-COVID-19 era, these patients were already at an increased risk of developing opportunistic infections. These often manifested with atypical symptoms. CASE SUMMARY We report another case of uneventful COVID-19 pneumonia in a 58-year old male who was 18 mo' post liver transplantation. He received tacrolimus monotherapy since July 2019. The clinical manifestations included only epigastric pain radiating to the right hypochondrium, nausea and vomiting. He had no fevers, cough, shortness of breath, anosmia or dysgeusia even if the chest computed tomography scan revealed an extension of the multiple patchy ground-glass density shadows to the upper lobe of the left lung too. He was hospitalised and received a course of oral chloroquine (200 mg × 3 per day) for a period of 10 d. Interestingly, the COVID 19 infection was uneventful though there were no modifications to his tacrolimus dosing. He was successfully discharged. We performed subsequent follow-up via telemedicine. CONCLUSION In light of the current pandemic, it is even more important to identify how the liver recipient's patients present and are managed, especially for immunosuppression treatment.
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Affiliation(s)
- Anna Sessa
- Department of Hepatology and Gastroenterology, University of Naples Federico II, Napoli 80131, Italy
- APHP, Unité Médicale de Transplantation Hépatique Hôpital Pitié Salpêtrière, Paris 75013, France
| | - Alessandra Mazzola
- APHP, Unité Médicale de Transplantation Hépatique Hôpital Pitié Salpêtrière, Paris 75013, France
- Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine (CRSA), Paris 75013, France
| | - Chetana Lim
- APHP, Unité de Chirurgie Hépatobiliaire et Transplantation Hépatique, Hôpital Pitié Salpêtrière, Paris 75013, France
| | - Mohammed Atif
- APHP, Centre d’immunologie et des Maladies Infectieuses, Inserm U1135, Hôpital Pitié-Salpêtrière, Paris 75013, France
| | - Juliana Pappatella
- APHP, Unité Médicale de Transplantation Hépatique Hôpital Pitié Salpêtrière, Paris 75013, France
- Hospital Felicio Rocho, Barro Preto 9530, Brazil
| | - Valerie Pourcher
- APHP, Service des Maladies Infectieuses, Hôpital Pitié Salpêtrière, Paris 75013, France
| | - Olivier Scatton
- Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine (CRSA), Paris 75013, France
- APHP, Unité de Chirurgie Hépatobiliaire et Transplantation Hépatique, Hôpital Pitié Salpêtrière, Paris 75013, France
| | - Filomena Conti
- APHP, Unité Médicale de Transplantation Hépatique Hôpital Pitié Salpêtrière, Paris 75013, France
- Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine (CRSA), Paris 75013, France
- Sorbonne Université, INSERM, Institute of Cardiometabolisme and Nutrition (ICAN), Paris 75013, France
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Atif M, Devanesan S, AlSalhi MS, Masilamani V, Saleem MNA, AlShebly M, Farhat K, Hussain I, Alimgeer KS. An experimental and algorithm-based study of the spectral features of breast cancer patients by a photodiagnosis approach. Photodiagnosis Photodyn Ther 2020; 31:101851. [PMID: 32497774 DOI: 10.1016/j.pdpdt.2020.101851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 03/04/2020] [Revised: 05/26/2020] [Accepted: 05/29/2020] [Indexed: 10/24/2022]
Abstract
In the present study, the spectral diagnosis of blood plasma samples of breast cancer patients and an equal number of normal controls was investigated. A set of ratio parameters was acquired by employing SXS and FES. The samples were also analyzed statistically by employing Welch two-sample t-tests, and the effects of three ratio parameters, R1, R2, and R3, were also studied by plotting them against the subject numbers. A linear discriminant was also applied to verify the exact classification of normal control and breast cancer patients. It was observed that the levels of biofluorophores such as porphyrin, NADH, tryptophan and flavins were elevated 2- to 3-fold for breast cancer patients compared to normal controls, with an accuracy of approximately 100 %. We have also confirmed the validity of the obtained experimental results by using an advanced robust diagnostic algorithm. The experimental results of the current study may have a vital and substantial impact on the detection and screening protocols used for future breast cancer patients. The spectral analysis of body fluid could be of great value to add to and enhance the current procedures with an accuracy of approximately 100 % with limited number of samples. The results and objectives of this preliminary study were encouraging and useful for the discrimination of the features of breast cancer patients compared to those of normal controls.
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Affiliation(s)
- M Atif
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box-2455, Riyadh 11451, Saudi Arabia
| | - S Devanesan
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box-2455, Riyadh 11451, Saudi Arabia.
| | - M S AlSalhi
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box-2455, Riyadh 11451, Saudi Arabia.
| | - V Masilamani
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box-2455, Riyadh 11451, Saudi Arabia
| | | | - Mashael AlShebly
- Department of Obstetrics and Gynecology, College of Medicine, King Khalid University Hospital, King Saud University, Riyadh, 11451, Saudi Arabia
| | - K Farhat
- Department of Urology, Cancer Research Chair, College of Medicine, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Ijaz Hussain
- Department of Statistics, Quaid-i-Azam University, Islamabad, Pakistan
| | - K S Alimgeer
- Electrical and Computer Engineering Department, COMSATS University Islambad, Islamabad Campus, Park Road, Chak Shahzad, Islamabad, 45550, Pakistan
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Iqbal S, Fakhar-e-Alam M, Atif M, Ahmed N, -ul-Ahmad A, Amin N, Alghamdi RA, Hanif A, Farooq WA. Correction: Iqbal, S. et al. Empirical Modeling of Zn/ZnO Nanoparticles Decorated/Conjugated with Fotolon (Chlorine e6) Based Photodynamic Therapy towards Liver Cancer Treatment. Micromachines, 2019, 10, 60. Micromachines (Basel) 2020; 11:mi11030262. [PMID: 32121359 PMCID: PMC7143613 DOI: 10.3390/mi11030262] [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] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 02/26/2020] [Indexed: 06/10/2023]
Abstract
In the published paper [...].
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Affiliation(s)
- Seemab Iqbal
- Department of Physics, Government College University, Faisalabad 38000, Pakistan; (S.I.); (N.A.)
| | - Muhammad Fakhar-e-Alam
- Department of Physics, Government College University, Faisalabad 38000, Pakistan; (S.I.); (N.A.)
- Key Laboratory of Magnetic Materials and Devices & Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - M. Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11543, Saudi Arabia; (R.a.A.); (W.A.F.)
| | - Nasar Ahmed
- Department of Physics, University of Azad Jammu and Kashmir, Muzaffarabad 13100, Pakistan;
| | - Aqrab -ul-Ahmad
- School of Physics, Dalian University of Technology, Dalian 116024, China;
- School of Microelectronics, Dalian University of Technology, Dalian 116024, China
| | - N. Amin
- Department of Physics, Government College University, Faisalabad 38000, Pakistan; (S.I.); (N.A.)
| | - Raed ahmed Alghamdi
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11543, Saudi Arabia; (R.a.A.); (W.A.F.)
| | - Atif Hanif
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh 11543, Saudi Arabia;
| | - W. Aslam Farooq
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11543, Saudi Arabia; (R.a.A.); (W.A.F.)
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Iqbal S, Fakhar-e-Alam M, Atif M, Amin N, Ali A, Shafiq M, Ismail M, Hanif A, Farooq WA. Photodynamic therapy, facile synthesis, and effect of sintering temperature on the structure, morphology, optical properties, and anticancer activity of Co3O4 nanocrystalline materials in the HepG2 cell line. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112130] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Saleem M, Farooq WA, Khan MI, Akhtar MN, Rehman SU, Ahmad N, Khalid M, Atif M, AlMutairi MA, Irfan M. Effect of ZnO Nanoparticles Coating Layers on Top of ZnO Nanowires for Morphological, Optical, and Photovoltaic Properties of Dye-Sensitized Solar Cells. Micromachines (Basel) 2019; 10:mi10120819. [PMID: 31779196 PMCID: PMC6953122 DOI: 10.3390/mi10120819] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Revised: 11/12/2019] [Accepted: 11/20/2019] [Indexed: 11/16/2022]
Abstract
This paper reports on the synthesis of ZnO nanowires (NWs), as well asthe compound nanostructures of nanoparticles (NPs) and nanowires (NWs+NPs) with different coating layers of NPs on the top of NWs and their integration in dye-sensitized solar cells (DSSCs). In compound nanostructures, NWs offer direct electrical pathways for fast electron transfer, and the NPs of ZnOdispread and fill the interstices between the NWs of ZnO, offering a huge surface area for enough dye anchoring and promoting light harvesting. A significant photocurrent density of 2.64 mA/cm2 and energy conversion efficiency of 1.43% was obtained with NWs-based DSSCs. The total solar-to-electric energy conversion efficiency of the NWs+a single layer of NPs was found to be 2.28%, with a short-circuit photocurrent density (JSC) of 3.02 mA/cm2, open-circuit voltage (VOC) of 0.74 V, and a fill factor (FF) of 0.76, which is 60% higher than that of NWs cells and over 165% higher than NWs+a triple layer of NPs-based DSSCs. The improved performance was obtained due to the increased specific surface area for higher dye anchoring and light harvesting of compound nanostructures with NWs+a single layer of NPs.
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Affiliation(s)
- Muhammad Saleem
- Department of Physics, Khwaja Freed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan; (M.S.); (N.A.)
| | - W. A. Farooq
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (M.A.); (M.A.A.)
- Correspondence:
| | - M. I. Khan
- Department of Physics, The University of Lahore, Lahore 53700, Pakistan;
| | - Majid. Niaz. Akhtar
- Department of Physics, Muhammad Nawaz Sharif (MNS) University of Engineering and Technology, Multan 60000, Pakistan
| | - Saif Ur Rehman
- Department of Physics, COMSATS University Islamabad, Lahore 54000, Pakistan;
| | - Naseeb Ahmad
- Department of Physics, Khwaja Freed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan; (M.S.); (N.A.)
| | - Muhammad Khalid
- Department of Chemistry, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan;
| | - M. Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (M.A.); (M.A.A.)
| | - Mona A. AlMutairi
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (M.A.); (M.A.A.)
| | - Muhammad Irfan
- CAS Key Laboratory of Strongly Coupled Quantum Matter Physics, USTC, Hefei 230026, China;
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Akram MW, Raziq F, Fakhar-e-Alam M, Aziz MH, Alimgeer K, Atif M, Amir M, Hanif A, Aslam Farooq W. Tailoring of Au-TiO2 nanoparticles conjugated with doxorubicin for their synergistic response and photodynamic therapy applications. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.112040] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Atif M, Lynch JW, Keramidas A. The effects of insecticides on two splice variants of the glutamate-gated chloride channel receptor of the major malaria vector, Anopheles gambiae. Br J Pharmacol 2019; 177:175-187. [PMID: 31479507 DOI: 10.1111/bph.14855] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 08/18/2019] [Accepted: 08/27/2019] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE Between half to 1 million people die annually from malaria. Anopheles gambiae mosquitoes are major malaria vectors. Unfortunately, resistance has emerged to the agents currently used to control A. gambiae, creating a demand for novel control measures. The pentameric glutamate-gated chloride channel (GluCl) expressed in the muscle and nerve cells of these organisms are a potentially important biological target for malaria control. The pharmacological properties of Anophiline GluCl receptors are, however, largely unknown. Accordingly, we compared the efficacy of four insecticides (lindane, fipronil, picrotoxin, and ivermectin) on two A. gambiae GluCl receptor splice variants with the aim of providing a molecular basis for designing novel anti-malaria treatments. EXPERIMENTAL APPROACH The A. gambiae GluCl receptor b1 and c splice variants were expressed homomerically in Xenopus laevis oocytes and studied with electrophysiological techniques, using two-electrode voltage-clamp. KEY RESULTS The b1 and c GluCl receptors were activated with similar potencies by glutamate and ivermectin. Fipronil was more potent than picrotoxin and lindane at inhibiting glutamate- and ivermectin-gated currents. Importantly, b1 GluCl receptors exhibited reduced sensitivity to picrotoxin and lindane. They also recovered from these effects to a greater extent than c GluCl receptors CONCLUSIONS AND IMPLICATIONS: The two splice variant subunits exhibited differential sensitivities to multiple, structurally divergent insecticides, without accompanying changes in the sensitivity to the endogenous neurotransmitter, glutamate, implying that drug resistance may be caused by alterations in relative subunit expression levels, without affecting physiological function. Our results strongly suggest that it should be feasible to develop novel subunit-specific pharmacological agents.
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Affiliation(s)
- Mohammed Atif
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Joseph W Lynch
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Angelo Keramidas
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD, Australia
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Iqbal S, Fakhar-e-Alam M, Akbar F, Shafiq M, Atif M, Amin N, Ismail M, Hanif A, Farooq WA. Application of silver oxide nanoparticles for the treatment of cancer. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.04.041] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Mohr A, Atif M, Balderas R, Gorochov G, Miyara M. The role of FOXP3 + regulatory T cells in human autoimmune and inflammatory diseases. Clin Exp Immunol 2019; 197:24-35. [PMID: 30830965 DOI: 10.1111/cei.13288] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/21/2019] [Indexed: 02/06/2023] Open
Abstract
CD4+ regulatory T cells (Treg ) expressing the forkhead box protein 3 (FOXP3) transcription factor (Tregs ) are instrumental for the prevention of autoimmune diseases. There is increasing evidence that the human T regulatory population is highly heterogeneous in phenotype and function. Numerous studies conducted in human autoimmune diseases have shown that Treg cells are impaired either in their suppressive function, in number, or both. However, the contribution of the FOXP3+ Treg subpopulations to the development of autoimmunity has not been delineated in detail. Rare genetic disorders that involve deficits in Treg function can be studied to develop a global idea of the impact of partial or complete deficiency in a specific molecular mechanism involved in Treg function. In patients with reduced Treg numbers (but no functional deficiency), the expansion of autologous Treg cells could be a suitable therapeutic approach: either infusion of in-vitro autologous expanded cells, infusion of interleukin (IL)-2/anti-IL-2 complex, or both. Treg biology-based therapies may not be suitable in patients with deficits of Treg function, unless their deficit can be corrected in vivo/in vitro. Finally, it is critical to consider the appropriate stage of autoimmune diseases at which administration of Treg cellular therapy can be most effective. We discuss conflicting data regarding whether Treg cells are more effectual at preventing the initiation of autoimmunity, ameliorating disease progression or curing autoimmunity itself.
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Affiliation(s)
- A Mohr
- Sorbonne Université, Inserm, Centre d'immunologie et des maladies infectieuses, Paris (Cimi-Paris), Paris, France
| | - M Atif
- Sorbonne Université, Inserm, Centre d'immunologie et des maladies infectieuses, Paris (Cimi-Paris), Paris, France
| | | | - G Gorochov
- Sorbonne Université, Inserm, Centre d'immunologie et des maladies infectieuses, Paris (Cimi-Paris), Paris, France.,Sorbonne Université, Inserm, Centre d'immunologie et des maladies infectieuses, Paris, France (Cimi-Paris), AP-HP Hôpital Pitié-Salpêtrière, Paris, France
| | - M Miyara
- Sorbonne Université, Inserm, Centre d'immunologie et des maladies infectieuses, Paris (Cimi-Paris), Paris, France.,Sorbonne Université, Inserm, Centre d'immunologie et des maladies infectieuses, Paris, France (Cimi-Paris), AP-HP Hôpital Pitié-Salpêtrière, Paris, France
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27
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Atif M, Smith JJ, Estrada-Mondragon A, Xiao X, Salim AA, Capon RJ, Lynch JW, Keramidas A. GluClR-mediated inhibitory postsynaptic currents reveal targets for ivermectin and potential mechanisms of ivermectin resistance. PLoS Pathog 2019; 15:e1007570. [PMID: 30695069 PMCID: PMC6368337 DOI: 10.1371/journal.ppat.1007570] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 02/08/2019] [Accepted: 01/08/2019] [Indexed: 12/19/2022] Open
Abstract
Glutamate-gated chloride channel receptors (GluClRs) mediate inhibitory neurotransmission at invertebrate synapses and are primary targets of parasites that impact drastically on agriculture and human health. Ivermectin (IVM) is a broad-spectrum pesticide that binds and potentiates GluClR activity. Resistance to IVM is a major economic and health concern, but the molecular and synaptic mechanisms of resistance are ill-defined. Here we focus on GluClRs of the agricultural endoparasite, Haemonchus contortus. We demonstrate that IVM potentiates inhibitory input by inducing a tonic current that plateaus over 15 minutes and by enhancing post-synaptic current peak amplitude and decay times. We further demonstrate that IVM greatly enhances the active durations of single receptors. These effects are greatly attenuated when endogenous IVM-insensitive subunits are incorporated into GluClRs, suggesting a mechanism of IVM resistance that does not affect glutamate sensitivity. We discovered functional groups of IVM that contribute to tuning its potency at different isoforms and show that the dominant mode of access of IVM is via the cell membrane to the receptor. Glutamate-gated chloride channel receptors (GluClRs) mediate chemoelectric inhibition in invertebrate animals and are targets for broad-spectrum pesticides such as ivermectin. However, resistance to ivermectin threatens the effective control of invertebrates that cause a range of agricultural and human diseases. This study investigates different isoforms of GluClR expressed by the major agricultural endoparasite, Haemonchus contortus, on a synaptic and single receptor level. We discovered that ivermectin enhances synaptic current amplitude and decay and lengthens single receptor activity. Furthermore, ivermectin is less efficacious at GluClRs that incorporate a naturally ivermectin-resistant subunit, suggesting a potential resistance mechanism. Finally, we identify two chemical interactions between the GluClR and ivermectin that determine its potency and show that ivermectin binds to GluClRs via cell membrane interactions.
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Affiliation(s)
- Mohammed Atif
- Queensland Brain Institute, The University of Queensland, Brisbane, Australia
| | - Jennifer J. Smith
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Australia
| | | | - Xue Xiao
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Australia
| | - Angela A. Salim
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Australia
| | - Robert J. Capon
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Australia
| | - Joseph W. Lynch
- Queensland Brain Institute, The University of Queensland, Brisbane, Australia
- * E-mail: (AK); (JWL)
| | - Angelo Keramidas
- Queensland Brain Institute, The University of Queensland, Brisbane, Australia
- * E-mail: (AK); (JWL)
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Iqbal S, Fakhar-E-Alam M, Atif M, Ahmed N, -Ul-Ahmad A, Amin N, Alghamdi RA, Hanif A, Farooq WA. Empirical Modeling of Zn/ZnO Nanoparticles Decorated/Conjugated with Fotolon (Chlorine e6) Based Photodynamic Therapy towards Liver Cancer Treatment. Micromachines (Basel) 2019; 10:mi10010060. [PMID: 30658388 PMCID: PMC6357181 DOI: 10.3390/mi10010060] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 01/08/2019] [Accepted: 01/08/2019] [Indexed: 01/12/2023]
Abstract
The current study is based on Zn/ZnO nanoparticles photodynamic therapy (PDT) mediated effects on healthy liver cells and cancerous cells. The synthesis of Zn/ZnO nanoparticles was accomplished using chemical and hydrothermal methods. The characterization of the synthesized nanoparticles was carried out using manifold techniques (e.g., transmission electron microscopy (TEM), X-ray diffraction (XRD), and energy dispersive X-ray spectroscopy (EDS)). In order to study the biotoxicity of the grown nanoparticles, they were applied individually and in conjunction with the third generation photosensitiser Fotolon (Chlorine e6) in the in vivo model of the normal liver of the Wister rat, and in the in vitro cancerous liver (HepG2) model both in the dark and under a variety of laser exposures (630 nm, Ultraviolet (UV) light). The localization of ZnO nanoparticles was observed by applying fluorescence spectroscopy on a 1 cm2 selected area of normal liver, whereas the in vitro cytotoxicity and reactive oxygen species (ROS) detection were carried out by calculating the loss in the cell viability of the hepatocellular model by applying a neutral red assay (NRA). Furthermore, a statistical analysis is carried out and it is ensured that the p value is less than 0.05. Thus, the current study has highlighted the potential for applying Zn/ZnO nanoparticles in photodynamic therapy that would lead to wider medical applications to improve the efficiency of cancer treatment and its biological aspect study.
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Affiliation(s)
- Seemab Iqbal
- Department of Physics, Government College University, Faisalabad 38000, Pakistan.
| | - Muhammad Fakhar-E-Alam
- Department of Physics, Government College University, Faisalabad 38000, Pakistan.
- Key Laboratory of Magnetic Materials and Devices & Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
| | - M Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11543, Saudi Arabia.
| | - Nasar Ahmed
- Department of Physics, University of Azad Jammu and Kashmir, Muzaffarabad 13100, Pakistan.
| | - Aqrab -Ul-Ahmad
- School of Physics, Dalian University of Technology, Dalian 116024, China.
- School of Microelectronics, Dalian University of Technology, Dalian 116024, China.
| | - N Amin
- Department of Physics, Government College University, Faisalabad 38000, Pakistan.
| | - Raed Ahmed Alghamdi
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11543, Saudi Arabia.
| | - Atif Hanif
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh 11543, Saudi Arabia.
| | - W Aslam Farooq
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11543, Saudi Arabia.
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Akram MW, Fakhar-E-Alam M, Atif M, Butt AR, Asghar A, Jamil Y, Alimgeer KS, Wang ZM. In vitro evaluation of the toxic effects of MgO nanostructure in Hela cell line. Sci Rep 2018; 8:4576. [PMID: 29545644 PMCID: PMC5854676 DOI: 10.1038/s41598-018-23105-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 03/06/2018] [Indexed: 01/28/2023] Open
Abstract
MgO is an attractive choice for carcinogenic cell destruction in photodynamic therapy, as confirmed by manifold analysis. The prime focus of the presented research is to investigate the toxicity caused by morphologically different MgO nanostructures obtained by annealing at various annealing temperatures. Smart (stimuli-responsive) MgO nanomaterials are a very promising class of nanomaterials, and their properties can be controlled by altering their size, morphology, or other relevant characteristics. The samples investigated here were grown by the co-precipitation technique. Toxicity-dependent parameters were assessed in a HeLa cell model after annealing the grown samples at 350 °C, 450 °C, and 550 °C. After the overall characterization, an analysis of toxicity caused by changes in the MgO nanostructure morphology was tested in a HeLa cell model using a neutral red assay and microscopy. The feasibility of using MgO for PDT was assessed. Empirical modelling was applied to corroborate the experimental results obtained from assessing cell viability losses and reactive oxygen species. The results indicate that MgO is an excellent candidate material for medical applications and could be utilized for its potential ability to upgrade conventionally used techniques.
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Affiliation(s)
- M Waseem Akram
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, 610054, Chengdu, China.
| | - Muhammad Fakhar-E-Alam
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, 610054, Chengdu, China
- Department of Physics, Government College University, 38000, Faisalabad, Pakistan
| | - M Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, Saudi Arabia.
- National Institute of Laser and Optronics, Nilore, Islamabad, Pakistan.
| | | | - Ali Asghar
- Department of Mathematics and Statistics, University of Lahore, Lahore, Pakistan
| | - Yasir Jamil
- Laser Spectroscopy Lab., Department of Physics, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - K S Alimgeer
- COMSATS Institute of Information Technology, Islamabad, Pakistan
| | - Zhiming M Wang
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, 610054, Chengdu, China.
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Javeed S, Alimgeer KS, Javed W, Atif M, Uddin M. A modified artificial neural network based prediction technique for tropospheric radio refractivity. PLoS One 2018; 13:e0192069. [PMID: 29494609 PMCID: PMC5832215 DOI: 10.1371/journal.pone.0192069] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Accepted: 01/16/2018] [Indexed: 12/04/2022] Open
Abstract
Radio refractivity plays a significant role in the development and design of radio systems for attaining the best level of performance. Refractivity in the troposphere is one of the features affecting electromagnetic waves, and hence the communication system interrupts. In this work, a modified artificial neural network (ANN) based model is applied to predict the refractivity. The suggested ANN model comprises three modules: the data preparation module, the feature selection module, and the forecast module. The first module applies pre-processing to make the data compatible for the feature selection module. The second module discards irrelevant and redundant data from the input set. The third module uses ANN for prediction. The ANN model applies a sigmoid activation function and a multi-variate auto regressive model to update the weights during the training process. In this work, the refractivity is predicted and estimated based on ten years (2002–2011) of meteorological data, such as the temperature, pressure, and humidity, obtained from the Pakistan Meteorological Department (PMD), Islamabad. The refractivity is estimated using the method suggested by the International Telecommunication Union (ITU). The refractivity is predicted for the year 2012 using the database of the previous ten years, with the help of ANN. The ANN model is implemented in MATLAB. Next, the estimated and predicted refractivity levels are validated against each other. The predicted and actual values (PMD data) of the atmospheric parameters agree with each other well, and demonstrate the accuracy of the proposed ANN method. It was further found that all parameters have a strong relationship with refractivity, in particular the temperature and humidity. The refractivity values are higher during the rainy season owing to a strong association with the relative humidity. Therefore, it is important to properly cater the signal communication system during hot and humid weather. Based on the results, the proposed ANN method can be used to develop a refractivity database, which is highly important in a radio communication system.
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Affiliation(s)
- Shumaila Javeed
- Department of Mathematics, COMSATS Institute of Information Technology, Park Road, Chak Shahzad, Islamabad, Pakistan
| | - Khurram Saleem Alimgeer
- Department of Electrical Engineering, COMSATS Institute of Information Technology, Park Road, Chak Shahzad, Islamabad, Pakistan
- * E-mail:
| | - Wajahat Javed
- Department of Electrical Engineering, COMSATS Institute of Information Technology, Park Road, Chak Shahzad, Islamabad, Pakistan
| | - M. Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Mueen Uddin
- Department of Information Systems, Faculty of Engineering, Effat University, Jeddah, Saudi Arabia
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Atif M, Estrada-Mondragon A, Nguyen B, Lynch JW, Keramidas A. Effects of glutamate and ivermectin on single glutamate-gated chloride channels of the parasitic nematode H. contortus. PLoS Pathog 2017; 13:e1006663. [PMID: 28968469 PMCID: PMC5638611 DOI: 10.1371/journal.ppat.1006663] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 10/12/2017] [Accepted: 09/22/2017] [Indexed: 12/12/2022] Open
Abstract
Ivermectin (IVM) is a widely-used anthelmintic that works by binding to and activating glutamate-gated chloride channel receptors (GluClRs) in nematodes. The resulting chloride flux inhibits the pharyngeal muscle cells and motor neurons of nematodes, causing death by paralysis or starvation. IVM resistance is an emerging problem in many pest species, necessitating the development of novel drugs. However, drug optimisation requires a quantitative understanding of GluClR activation and modulation mechanisms. Here we investigated the biophysical properties of homomeric α (avr-14b) GluClRs from the parasitic nematode, H. contortus, in the presence of glutamate and IVM. The receptor proved to be highly responsive to low nanomolar concentrations of both compounds. Analysis of single receptor activations demonstrated that the GluClR oscillates between multiple functional states upon the binding of either ligand. The G36’A mutation in the third transmembrane domain, which was previously thought to hinder access of IVM to its binding site, was found to decrease the duration of active periods and increase receptor desensitisation. On an ensemble macropatch level the mutation gave rise to enhanced current decay and desensitisation rates. Because these responses were common to both glutamate and IVM, and were observed under conditions where agonist binding sites were likely saturated, we infer that G36’A affects the intrinsic properties of the receptor with no specific effect on IVM binding mechanisms. These unexpected results provide new insights into the activation and modulatory mechanisms of the H. contortus GluClRs and provide a mechanistic framework upon which the actions of drugs can be reliably interpreted. IVM is a gold standard anti-parasitic drug that is used extensively to control invertebrate parasites pest species. The drug targets the glutamate-gated chloride channel receptor (GluClR) found on neurons and muscle cells of these organisms, causing paralysis and death. However, IVM resistance is becoming a serious problem in human and animal health, as well as human food production. We provide the first comprehensive investigation of the functional properties of the GluClR of H. contortus, which is a major parasite in grazing animals, such as sheep and goats. We compared glutamate and IVM induced activity of the wild-type and a mutant GluClR, G36’A, that markedly reduces IVM sensitivity in wild populations of pests. Our data demonstrate that the mutation reduces IVM sensitivity by altering the functional properties of the GluClR rather than specifically affecting the binding of IVM, even though the mutation occurs at the IVM binding site. This study provides a mechanistic framework upon which the actions of new candidate anthelmintic drugs can be interpreted.
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Affiliation(s)
- Mohammed Atif
- Queensland Brain Institute, The University of Queensland, Brisbane, Australia
| | | | - Bindi Nguyen
- Queensland Brain Institute, The University of Queensland, Brisbane, Australia
| | - Joseph W. Lynch
- Queensland Brain Institute, The University of Queensland, Brisbane, Australia
- School of Biomedical Sciences, The University of Queensland, Brisbane, Australia
- * E-mail: (AK); (JL)
| | - Angelo Keramidas
- Queensland Brain Institute, The University of Queensland, Brisbane, Australia
- * E-mail: (AK); (JL)
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Abstract
Background There is much fragmentation and little consensus in the use of descriptors for the different disciplines that make up the pharmacy sector. Globalization, reprofessionalization and the influx of other disciplines means there is a requirement for a greater degree of standardization. This has not been well addressed in the pharmacy practice research and education literature. Objectives To identify and define the various subdisciplines of the pharmacy sector and integrate them into an internationally relevant conceptual model based on narrative synthesis of the literature. Methods A literature review was undertaken to understand the fragmentation in dialogue surrounding definitions relating to concepts and practices in the context of the pharmacy sector. From a synthesis of this literature, the need for this model was justified. Key assumptions of the model were identified, and an organic process of development took place with the three authors engaging in a process of sense-making to theorize the model. Results The model is “fit for purpose” across multiple countries and includes two components making up the umbrella term “pharmaceutical practice”. The first component is the four conceptual dimensions, which outline the disciplines including social and administrative sciences, community pharmacy, clinical pharmacy and pharmaceutical sciences. The second component of the model describes the “acts of practice”: teaching, research and professional advocacy; service and academic enterprise. Conclusions This model aims to expose issues relating to defining pharmacy and its practice and to create dialogue. No model is perfect, but there are implications for what is posited in the areas of policy, education and practice and future research. The main point is the need for increased clarity, or at least beginning the discussion to increase the clarity of definition and consistency of meaning in-and-across the pharmacy sector locally, nationally and internationally.
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Affiliation(s)
- S L Scahill
- School of Management, Massey Business School, Massey University, Albany, Auckland, New Zealand
| | - M Atif
- Pharmacy School, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Z U Babar
- School of Pharmacy, University of Huddersfield, Huddersfield, England, UK.,School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
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Fakhar-e-Alam M, Akram MW, Iqbal S, Alimgeer KS, Atif M, Sultana K, Willander M, Wang ZM. Empirical Modeling of Physiochemical Immune Response of Multilayer Zinc Oxide Nanomaterials under UV Exposure to Melanoma and Foreskin Fibroblasts. Sci Rep 2017; 7:46603. [PMID: 28436451 PMCID: PMC5402280 DOI: 10.1038/srep46603] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 03/21/2017] [Indexed: 01/05/2023] Open
Abstract
Carcinogenesis is a complex molecular process starting with genetic and epigenetic alterations, mutation stimulation, and DNA modification, which leads to proteomic adaptation ending with an uncontrolled proliferation mechanism. The current research focused on the empirical modelling of the physiological response of human melanoma cells (FM55P) and human foreskin fibroblasts cells (AG01518) to the multilayer zinc oxide (ZnO) nanomaterials under UV-A exposure. To validate this experimental scheme, multilayer ZnO nanomaterials were grown on a femtotip silver capillary and conjugated with protoporphyrin IX (PpIX). Furthermore, PpIX-conjugated ZnO nanomaterials grown on the probe were inserted into human melanoma (FM55P) and foreskin fibroblasts cells (AG01518) under UV-A light exposure. Interestingly, significant cell necrosis was observed because of a loss in mitochondrial membrane potential just after insertion of the femtotip tool. Intense reactive oxygen species (ROS) fluorescence was observed after exposure to the ZnO NWs conjugated with PpIX femtotip model under UV exposure. Results were verified by applying several experimental techniques, e.g., ROS detection, MTT assay, and fluorescence spectroscopy. The present work reports experimental modelling of cell necrosis in normal human skin as well as a cancerous tissue. These obtained results pave the way for a more rational strategy for biomedical and clinical applications.
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Affiliation(s)
- Muhammad Fakhar-e-Alam
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, 610054 Chengdu, China
- Department of Science and Technology, Campus Norrköping, Linköping University, SE-601 74 Norrköping, Sweden
- Department of Physics, GC University, 38000 Faisalabad, Pakistan
| | - M. Waseem Akram
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, 610054 Chengdu, China
| | - Seemab Iqbal
- Department of Physics, GC University, 38000 Faisalabad, Pakistan
| | - K. S. Alimgeer
- COMSATS Institute of Information Technology, Islamabad, Pakistan
| | - M. Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, Saudi Arabia
- National Institute of Laser and Optronics, Nilore, Islamabad, Pakistan
| | - K. Sultana
- Department of Science and Technology, Campus Norrköping, Linköping University, SE-601 74 Norrköping, Sweden
| | - M. Willander
- Department of Science and Technology, Campus Norrköping, Linköping University, SE-601 74 Norrköping, Sweden
| | - Zhiming M. Wang
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, 610054 Chengdu, China
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Ali A, Ahmad M, Akhtar MN, Shaukat SF, Mustafa G, Atif M, Farooq WA. Magnetic nanoparticles (Fe3O4 & Co3O4) and their applications in urea biosensing. RUSS J APPL CHEM+ 2016. [DOI: 10.1134/s1070427216040017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Atif M, Boubechou N, Beddek M, Bezzaoucha A. BU-21 - Évolution sur 3 années de la prévalence des traitements antibiotiques dans un centre hospitalier universitaire d’un pays en développement. Med Mal Infect 2016. [DOI: 10.1016/s0399-077x(16)30345-6] [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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Hammad Aziz M, Fakhar-e-Alam M, Fatima M, Shaheen F, Iqbal S, Atif M, Talha M, Mansoor Ali S, Afzal M, Majid A, Shelih Al.Harbi T, Ismail M, Wang ZM, AlSalhi MS, Alahmed ZA. Photodynamic Effect of Ni Nanotubes on an HeLa Cell Line. PLoS One 2016; 11:e0150295. [PMID: 26990435 PMCID: PMC4798439 DOI: 10.1371/journal.pone.0150295] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 02/11/2016] [Indexed: 11/23/2022] Open
Abstract
Nickel nanomaterials are promising in the biomedical field, especially in cancer diagnostics and targeted therapy, due to their distinctive chemical and physical properties. In this experiment, the toxicity of nickel nanotubes (Ni NTs) were tested in an in vitro cervical cancer model (HeLa cell line) to optimize the parameters of photodynamic therapy (PDT) for their greatest effectiveness. Ni NTs were synthesized by electrodeposition. Morphological analysis and magnetic behavior were examined using a Scanning electron microscope (SEM), an energy dispersive X-ray analysis (EDAX) and a vibrating sample magnetometer (VSM) analysis. Phototoxic and cytotoxic effects of nanomaterials were studied using the Ni NTs alone as well as in conjugation with aminolevulinic acid (5-ALA); this was performed both in the dark and under laser exposure. Toxic effects on the HeLa cell model were evaluated by a neutral red assay (NRA) and by detection of intracellular reactive oxygen species (ROS) production. Furthermore, 10-200 nM of Ni NTs was prepared in solution form and applied to HeLa cells in 96-well plates. Maximum toxicity of Ni NTs complexed with 5-ALA was observed at 100 J/cm2 and 200 nM. Up to 65-68% loss in cell viability was observed. Statistical analysis was performed on the experimental results to confirm the worth and clarity of results, with p-values = 0.003 and 0.000, respectively. Current results pave the way for a more rational strategy to overcome the problem of drug bioavailability in nanoparticulate targeted cancer therapy, which plays a dynamic role in clinical practice.
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Affiliation(s)
- Muhammad Hammad Aziz
- Department of Physics, College of Science in Zulfi, Majmaah University, Zulfi, Saudi Arabia
- Department of Physics, COMSATS Institute of Information and Technology, Lahore, Pakistan
| | - M. Fakhar-e-Alam
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, 610054 Chengdu, China
- Department of Physics, GC University Faisalabad, Pakistan
| | - Mahvish Fatima
- Department of Physics, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Fozia Shaheen
- Department of Physics, GC University Lahore, Lahore, Pakistan
| | - Seemab Iqbal
- Department of Physics, GC University Faisalabad, Pakistan
| | - M. Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, Saudi Arabia
- National Institute of Laser and Optronics, Nilore, Islamabad, Pakistan
| | - Muhammad Talha
- Deanship of Scientific Research, King Saud University, Riyadh 11421, Saudi Arabia
| | - Syed Mansoor Ali
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Muhammad Afzal
- Department of Physics, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Abdul Majid
- Department of Physics, College of Science in Zulfi, Majmaah University, Zulfi, Saudi Arabia
| | - Thamir Shelih Al.Harbi
- Department of Physics, College of Science in Zulfi, Majmaah University, Zulfi, Saudi Arabia
| | - Muhammad Ismail
- Institute of Biomedical and Genetic Engineering (IBGE), 24 Mauve Area, G-9/1, Islamabad, Pakistan
| | - Zhiming M. Wang
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, 610054 Chengdu, China
| | - M. S. AlSalhi
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Z. A. Alahmed
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, Saudi Arabia
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Fatehmulla A, Aslam M, Farooq WA, Ali SM, Atif M, AlDhafiri AM, Yakuphanoglu F. Influence of Laser Exposure on the Physical Properties of Nano V2O5 Films Grown By Thermal Evaporation. THEOR EXP CHEM+ 2016. [DOI: 10.1007/s11237-016-9438-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Atif M, Idrees M, Nadeem M, Siddique M, Ashraf MW. Investigation on the structural, dielectric and impedance analysis of manganese substituted cobalt ferrite i.e., Co1−xMnxFe2O4 (0.0 ≤ x ≤ 0.4). RSC Adv 2016. [DOI: 10.1039/c5ra20621a] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The microstructure and cation distribution of Co1−xMnxFe2O4 were investigated and correlated with their electrical properties. Here, Mn substitution enhances the resistive properties which make them favorable for high-frequency applications.
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Affiliation(s)
- M. Atif
- Functional Materials Lab
- Department of Physics
- Air University
- Islamabad
- Pakistan
| | - M. Idrees
- Department of Physics
- COMSATS Institute of Information Technology
- Lahore
- Pakistan
| | - M. Nadeem
- Physics Division
- Directorate of Science
- PINSTECH
- Islamabad
- Pakistan
| | - M. Siddique
- Physics Division
- Directorate of Science
- PINSTECH
- Islamabad
- Pakistan
| | - M. W. Ashraf
- Department of Mathematics & Natural Sciences
- Prince Mohammad Bin Fahd University
- Al Khobar 31952
- Kingdom of Saudi Arabia
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Abstract
Toe-tourniquet syndrome is a rare and commonly misdiagnosed condition caused by a hair or a fiber wrapped around digits (fingers and toes). A four months baby girl who was crying and presented with redness and swelling at her 2nd and 3rd toes of right foot. Child had red and swollen 2nd and 3rd toes of right foot with hair end protruding through wounds. Constricting hairs were cut and removed. Toetourniquet syndrome is a rare entity which is caused by hair wrapped around a toe or a digit. Diagnosis is mostly clinical. In order to prevent this condition to happen, education of parents and clinicians is a cornerstone.
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Affiliation(s)
- N Baloch
- Department of Orthopaedic Surgery, Aga Khan University Hospital, Karachi, Pakistan
| | - M Atif
- Department of Orthopaedic Surgery, Aga Khan University Hospital, Karachi, Pakistan
| | - R H Rashid
- Department of Orthopaedic Surgery, Aga Khan University Hospital, Karachi, Pakistan
| | - P M Hashmi
- Department of Orthopaedic Surgery, Aga Khan University Hospital, Karachi, Pakistan
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Atif M, Farooq WA, Fatehmulla A, Aslam M, Ali SM. Photovoltaic and Impedance Spectroscopy Study of Screen-Printed TiO₂ Based CdS Quantum Dot Sensitized Solar Cells. Materials (Basel) 2015; 8:355-367. [PMID: 28787942 PMCID: PMC5455228 DOI: 10.3390/ma8010355] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 01/06/2015] [Indexed: 11/16/2022]
Abstract
Cadmium sulphide (CdS) quantum dot sensitized solar cells (QDSSCs) based on screen-printed TiO₂ were assembled using a screen-printing technique. The CdS quantum dots (QDs) were grown by using the Successive Ionic Layer Adsorption and Reaction (SILAR) method. The optical properties were studied by UV-Vis absorbance spectroscopy. Photovoltaic characteristics and impedance spectroscopic measurements of CdS QDSSCs were carried out under air mass 1.5 illuminations. The experimental results of capacitance against voltage indicate a trend from positive to negative capacitance because of the injection of electrons from the Fluorine doped tin oxide (FTO) electrode into TiO₂.
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Affiliation(s)
- M Atif
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
- National Institute of Laser and Optronics, Nilore, 45650 Islamabad, Pakistan.
| | - W A Farooq
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Amanullah Fatehmulla
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - M Aslam
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Syed Mansoor Ali
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
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Asif M, Jabeen Q, Atif M, Majid AMSA, Qamar-Uz-Zaman M. Diuretic Activity of Achyranthes aspera Linn Crude Aqueous Extract in Albino Rats. TROP J PHARM RES 2015. [DOI: 10.4314/tjpr.v13i12.14] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Atif M, Sulaiman SAS, Shafie AA, Asif M. Resource Utilization Pattern And Cost Of Tuberculosis Treatment In Penang, Malaysia. Value Health 2014; 17:A725-A726. [PMID: 27202579 DOI: 10.1016/j.jval.2014.08.051] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- M Atif
- The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | | | - A A Shafie
- Universiti Sains Malaysia, Penang, Malaysia
| | - M Asif
- Universiti Sains Malaysia, Penang, Malaysia
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Atif M, Sulaiman SAS, Shafie AA, Asif M. Duration of Treatment in Pulmonary Tuberculosis: are International Guidelines on the Management of Tuberculosis Missing Something? Value Health 2014; 17:A780. [PMID: 27202891 DOI: 10.1016/j.jval.2014.08.372] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- M Atif
- The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | | | - A A Shafie
- Universiti Sains Malaysia, Penang, Malaysia
| | - M Asif
- Universiti Sains Malaysia, Penang, Malaysia
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Atif M, Toghrayee Z, Sulaiman SAS, Shafie AA, Low HC, Babar ZUD. Missing data Analysis in Longitudinal Studies: Findings from a Quality of Life Study in Malaysian Tuberculosis Patients. Value Health 2014; 17:A778. [PMID: 27202884 DOI: 10.1016/j.jval.2014.08.361] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- M Atif
- The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | | | | | - A A Shafie
- Universiti Sains Malaysia, Penang, Malaysia
| | - H C Low
- Universiti Sains Malaysia, Penang, Malaysia
| | - Z U D Babar
- University of Auckland, Auckland, New Zealand
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Maalik A, Khan FA, Mumtaz A, Mehmood A, Azhar S, Atif M, Karim S, Altaf Y, Tariq I. Pharmacological Applications of Quercetin and its Derivatives: A Short Review. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i9.26] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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47
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Atif M, Sulaiman SAS, Shafie AA, Asif M, Jamshed SQ. Engaging Community Pharmacists and Alternative Practitioners: An Approach to Active Case Finding of Tuberculosis in Malaysia. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v12i6.34] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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48
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Asif M, Atif M, Malik ASA, Dan ZC, Ahmad I, Ahmad A. Diuretic Activity of Trianthema portulacastrum Crude Extract in Albino Rats. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v12i6.15] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Atif M, Khalid SH, Onn Kit GL, Sulaiman SAS, Asif M, Chandersekaran A. Development and validation of RP-HPLC-UV method for the determination of Glipizide in human plasma. J Young Pharm 2013; 5:26-9. [PMID: 24023449 DOI: 10.1016/j.jyp.2013.01.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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: 05/02/2012] [Accepted: 08/16/2012] [Indexed: 10/26/2022] Open
Abstract
A simple, sensitive and selective HPLC method with UV detection for determination of Glipizide in human plasma was developed. Liquid-liquid extraction method was used to extract the drug from the plasma samples. Chromatographic separation of Glipizide was achieved using C18 column (ZORBAX ODS 4.6 × 150 mm). The mobile phase was comprised of 0.01 M potassium dihydrogen phosphate and acetonitrile (65:35, v/v) adjusted to pH 4.25 with glacial acetic acid. The analysis was run at a flow rate of 1.5 mL/min with an injection volume was 20 μL. The detector was operated at 275 nm. The calibration curve was linear over a concentration range of 50-1600 ng/mL. Intra-day and inter-day precision and accuracy values were below 15%. The limit of quantification was 50 ng/mL and the mean recovery was above 98%. Freeze-thaw, short-term, long-term and post-preparative stability studies showed that Glipizide in plasma sample was stable. The method may be successfully applied to analyze the Glipizide concentration in plasma samples for bioavailability and bioequivalence studies.
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Affiliation(s)
- M Atif
- Discipline of Clinical Pharmacy, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Penang, Malaysia
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Abstract
The study is aimed to explore the perceptions and experiences of hypertensive patients toward medication use and adherence. The study was qualitative in nature conducted at Sandamen Provisional Hospital of Quetta city, Pakistan; a public hospital catering to the health needs of about 40% of the population. A qualitative approach was used to gain an in-depth knowledge of the issues. Sixteen patients were interviewed, and the saturation point was achieved after the 14(th) interview. All interviews were audio-taped, transcribed verbatim, and were then analyzed for thematic contents by the standard content analysis framework. Thematic content analysis yielded five major themes. (1) Perceived benefits and risks of medications, (2) physician's interaction with patients, (3) perception toward traditional remedies, (4) layman concept toward medications, and (5) beliefs toward hypertension and its control. The majority of the patients carried specific unrealistic beliefs regarding the long-term use of medication; yet these beliefs were heavily accepted and practiced by the society. The study indicated a number of key themes that can be used in changing the beliefs and experiences of hypertensive patients. Physician's attitude, patient's past experiences, and knowledge related to hypertension were noted as major contributing factors thus resulting in nonadherence to therapy prescribed.
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Affiliation(s)
- F Saleem
- Discipline of Social and Administrative Pharmacy, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Penang, Malaysia
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