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Ahmed K, Tauseef H, Ainuddin JA, Zafar M, Khan I, Salim A, Mirza MR, Mohiuddin OA. Assessment of the proteome profile of decellularized human amniotic membrane and its biocompatibility with umbilical cord-derived mesenchymal stem cells. J Biomed Mater Res A 2024; 112:1041-1056. [PMID: 38380793 DOI: 10.1002/jbm.a.37685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/29/2024] [Accepted: 02/02/2024] [Indexed: 02/22/2024]
Abstract
Extracellular matrix-based bio-scaffolds are useful for tissue engineering as they retain the unique structural, mechanical, and physiological microenvironment of the tissue thus facilitating cellular attachment and matrix activities. However, considering its potential, a comprehensive understanding of the protein profile remains elusive. Herein, we evaluate the impact of decellularization on the human amniotic membrane (hAM) based on its proteome profile, physicochemical features, as well as the attachment, viability, and proliferation of umbilical cord-derived mesenchymal stem cells (hUC-MSC). Proteome profiles of decellularized hAM (D-hAM) were compared with hAM, and gene ontology (GO) enrichment analysis was performed. Proteomic data revealed that D-hAM retained a total of 249 proteins, predominantly comprised of extracellular matrix proteins including collagens (collagen I, collagen IV, collagen VI, collagen VII, and collagen XII), proteoglycans (biglycan, decorin, lumican, mimecan, and versican), glycoproteins (dermatopontin, fibrinogen, fibrillin, laminin, and vitronectin), and growth factors including transforming growth factor beta (TGF-β) and fibroblast growth factor (FGF) while eliminated most of the intracellular proteins. Scanning electron microscopy was used to analyze the epithelial and basal surfaces of D-hAM. The D-hAM displayed variability in fibril morphology and porosity as compared with hAM, showing loosely packed collagen fibers and prominent large pore areas on the basal side of D-hAM. Both sides of D-hAM supported the growth and proliferation of hUC-MSC. Comparative investigations, however, demonstrated that the basal side of D-hAM displayed higher hUC-MSC proliferation than the epithelial side. These findings highlight the importance of understanding the micro-environmental differences between the two sides of D-hAM while optimizing cell-based therapeutic applications.
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Affiliation(s)
- Kainat Ahmed
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Haadia Tauseef
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | | | - Muneeza Zafar
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Irfan Khan
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Asmat Salim
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Munazza Raza Mirza
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Omair Anwar Mohiuddin
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
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Vankwani S, Mirza MR, Awan FR, Zafar M, Nawrocki A, Wasim M, Khan HN, Ayesha H, Larsen MR, Choudhary MI. Label free quantitative proteomic profiling of serum samples of intellectually disabled young patients revealed dysregulation of complement coagulation and cholesterol cascade systems. Metab Brain Dis 2024:10.1007/s11011-024-01351-6. [PMID: 38733546 DOI: 10.1007/s11011-024-01351-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 05/05/2024] [Indexed: 05/13/2024]
Abstract
Intellectual disability is a heterogeneous disorder, diagnosed using intelligence quotient (IQ) score criteria. Currently, no specific clinical test is available to diagnose the disease and its subgroups due to inadequate understanding of the pathophysiology. Therefore, current study was designed to explore the molecular mechanisms involved in disease perturbation, and to identify potential biomarkers for disease diagnosis and prognosis. A total of 250 participants were enrolled in this study, including 200 intellectually disabled (ID) subjects from the subgroups (mild, moderate, and severe) with age and gender matched healthy controls (n = 50). Initially, IQ testing score and biochemical profile of each subject was generated, followed by label-free quantitative proteomics of subgroups of IQ and healthy control group through nano-LC/MS- mass spectrometry. A total of 310 proteins were identified, among them198 proteins were common among all groups. Statistical analysis (ANOVA) of the subgroups of ID showed 142 differentially expressed proteins, in comparison to healthy control group. From these, 120 proteins were found to be common among all subgroups. The remaining 22 proteins were categorized as exclusive proteins found only in disease subgroups. Furthermore, the hierarchical cluster analysis (HCL) of common significant proteins was also performed, followed by PANTHER protein classification and GO functional enrichment analysis. Results provides that the datasets of differentially expressed proteins, belong to the categories of immune / defense proteins, transfer carrier proteins, apolipoproteins, complement proteins, protease inhibitors, hemoglobin proteins etc., they are known to involvein immune system, and complement and coagulation pathway cascade and cholesterol metabolism pathway. Exclusively expressed 22 proteins were found to be disease stage specific and strong PPI network specifically those that have significant role in platelets activation and degranulation, such as Filamin A (FLNA). Furthermore, to validate the mass spectrometric findings, four highly significant proteins (APOA4, SAP, FLNA, and SERPING) were quantified by ELISA in all the study subjects. AUROC analysis showed a significant association of APOA4 (0.830), FLNA (0.958), SAP (0.754) and SERPING (0.600) with the disease. Apolipoprotein A4 (APOA4) has a significant role in cholesterol transport, and in modulation of glucose and lipid metabolism in the CNS. Similarly, FLNA has a crucial role in the nervous system, especially in the functioning of synaptic network. Therefore, both APOA4, and FLNA proteins represent good potential for candidate biomarkers for the diagnosis and prognosis of the intellectual disability. Overall, serum proteome of ID patients provides valuable information of proteins/pathways that are altered during ID progression.
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Affiliation(s)
- Soma Vankwani
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Munazza Raza Mirza
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan.
| | - Fazli Rabbi Awan
- Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, P.O. Box. 577, Faisalabad, Pakistan.
| | - Muneeza Zafar
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
- Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, P.O. Box. 577, Faisalabad, Pakistan
| | - Arkadiusz Nawrocki
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Muhammad Wasim
- Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, P.O. Box. 577, Faisalabad, Pakistan
- Department of Biological and Biomedical Sciences, Aga Khan University, Karachi, Pakistan
| | - Haq Nawaz Khan
- Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, P.O. Box. 577, Faisalabad, Pakistan
- Department of Biological and Biomedical Sciences, Aga Khan University, Karachi, Pakistan
| | - Hina Ayesha
- Department of Pediatrics, Punjab Medical College, Allied & DHQ Hospitals, Faisalabad Medical University, Faisalabad, Pakistan
| | - Martin Rossel Larsen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Muhammad Iqbal Choudhary
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
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Zehra M, Usmani Y, Shafiq J, Khan A, Zafar M, Raza Mirza M, Shah SR, Al-Harrasi A, Hasan SM, Farooqui A, Ahmed A. In vitro and in vivo antimicrobial potential of lithium complex against multi-drug resistant Acinetobacter baumannii. Microbiol Spectr 2023; 11:e0193023. [PMID: 37861330 PMCID: PMC10715101 DOI: 10.1128/spectrum.01930-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Accepted: 09/12/2023] [Indexed: 10/21/2023] Open
Abstract
IMPORTANCE Multi-drug resistance (MDR) by virtue of evolving resistance and virulence mechanisms among A. baumannii is a global concern which is responsible for lethal hospital-acquired infections. Therefore, it is crucial to develop new therapeutics against it. Metal complexes are compact structures with diverse mechanisms that the pathogens cannot evade easily which make them a strong drug candidate. In this study, we assessed the in vitro and in vivo efficacy of lithium complex {[Li(phen)2 sal]} against biofilm-forming MDR A. baumannii. The lithium complex displayed strong antimicrobial activity and reduced the pre-formed mature biofilm which is key barrier for antimicrobial action. Moreover, it employs oxidative stress as one of its mode of actions and causes cellular rupturing. Lithium complex was non-toxic and was significantly effective to overcome pneumonia in mice model. These results highlight the untapped potential of metal complexes that can be explored and utilized for combating notorious A. baumannii infections.
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Affiliation(s)
- Moatter Zehra
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Yamina Usmani
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Jazib Shafiq
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Ajmal Khan
- Natural and Medical Science Research Center, University of Nizwa, Birkat Almouz, Oman
| | - Muneeza Zafar
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Munazza Raza Mirza
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Syed Raza Shah
- Natural and Medical Science Research Center, University of Nizwa, Birkat Almouz, Oman
| | - Ahmed Al-Harrasi
- Natural and Medical Science Research Center, University of Nizwa, Birkat Almouz, Oman
| | - Syed Mehmood Hasan
- Department of Pathology, Jinnah Sindh Medical University, Karachi, Pakistan
| | - Amber Farooqui
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
- Translational Medicine Program, The Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Ayaz Ahmed
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
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Zafar M, Malik IR, Mirza MR, Awan FR, Nawrocki A, Hussain M, Khan HN, Abbas S, Choudhary MI, Larsen MR. Mass-spectrometric analysis of APOB polymorphism rs1042031 (G/T) and its influence on serum proteome of coronary artery disease patients: genetic-derived proteomics consequences. Mol Cell Biochem 2023:10.1007/s11010-023-04797-x. [PMID: 37410210 DOI: 10.1007/s11010-023-04797-x] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 06/18/2023] [Indexed: 07/07/2023]
Abstract
Genetic polymorphisms of apolipoprotein B gene (APOB) may result into serum proteomic perturbance in Coronary Artery Disease (CAD). The current case-control cohort of Pakistani subjects was designed to analyze the genetic influence of APOB rs1042031, (G/T) genotype on serum proteome. Subjects were categorized into two groups: CAD patients (n = 480) and healthy individuals (n = 220). For genotyping, tetra ARMS-PCR was carried out and validated through sequencing, whereas LC/MS-based proteomic analysis of serum samples was performed through label-free quantification. In initial step of genotyping, the frequencies of each genotype GG, GT, and TT were 70%, 27%, and 30% in CAD patients, while in control group, the subjects were 52%, 43%, and 5%, respectively, in CAD patients. The genotypic frequencies in patients vs. control groups found significantly different (p = 0.004), and a strong association of dominant alleles GG with the CAD was observed in both dominant (OR: 2.4 (1.71-3.34), p = 0.001) and allelic genetic models (OR: 2.0 (1.45-2.86), p = 0.001). In second step of label-free quantitation, a total of 40 significant proteins were found with altered expression in CAD patients. The enriched Gene Ontology (GO) terms of molecular functions and pathways of these protein showed upregulated pathways as follows: chylomicron remodeling and assembly, complement cascade activation, plasma lipoprotein assembly, apolipoprotein-A receptor binding, and metabolism of fat-soluble vitamins in G allele carrier of rs1042031 (G > T) vs. mutant T-allele carriers. This study provides better understanding of CAD pathobiology by proteogenomics of APOB. It evidences the influence of APOB rs1042031-dominant (GG) genotype with CAD patients.
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Affiliation(s)
- Muneeza Zafar
- Department of Biotechnology, University of Sargodha, Sargodha, Pakistan
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences ICCBS), University of Karachi, Karachi, 75270, Pakistan
- Diabetes and Cardio-Metabolic Disorders Laboratory, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, P.O. Box. 577, Faisalabad, Pakistan
| | - Imran Riaz Malik
- Department of Biotechnology, University of Sargodha, Sargodha, Pakistan.
| | - Munazza Raza Mirza
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences ICCBS), University of Karachi, Karachi, 75270, Pakistan.
| | - Fazli Rabbi Awan
- Diabetes and Cardio-Metabolic Disorders Laboratory, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, P.O. Box. 577, Faisalabad, Pakistan.
- Pakistan Institute of Engineering and Applied Sciences (PIEAS), NIBGE-College, Islamabad, Pakistan.
| | - Arkadiusz Nawrocki
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Misbah Hussain
- Department of Biotechnology, University of Sargodha, Sargodha, Pakistan
- Diabetes and Cardio-Metabolic Disorders Laboratory, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, P.O. Box. 577, Faisalabad, Pakistan
| | - Haq Nawaz Khan
- Diabetes and Cardio-Metabolic Disorders Laboratory, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, P.O. Box. 577, Faisalabad, Pakistan
- Department of Biological and Biomedical Sciences, The Aga Khan University, Stadium Road, P.O. Box 3500, Karachi, 74800, Pakistan
| | - Shahid Abbas
- Faisalabad Institute of Cardiology (FIC), Faisalabad, Pakistan
| | - Muhammad Iqbal Choudhary
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences ICCBS), University of Karachi, Karachi, 75270, Pakistan
| | - Martin R Larsen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
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Jabeen S, Zafar M, Ahmad M, Althobaiti AT, Ozdemir FA, Kutlu MA, Makhkamov TK, Sultana S, Ameen M, Majeed S. Ultra-sculpturing of seed morphotypes in selected species of genus Salvia L. and their taxonomic significance. Plant Biol (Stuttg) 2023; 25:96-106. [PMID: 36181702 DOI: 10.1111/plb.13473] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 08/15/2022] [Indexed: 06/16/2023]
Abstract
The taxonomic importance of macromorphological and micromorphological seed characteristics was investigated using SEM of ten species of the Salvia genus from Pakistan. The aim was to identify diagnostic seed ultrastructural features that could aid in species delimitation, correct identification and phylogenetic position. The ultrastructure of Salvia varies greatly, and a wide range of unique micromorphological features have been observed. Seed micromorphological features were explored by SEM, including seed shape, colour, texture, cell outline, surface sculpturing, epidermal cell arrangement, anticlinal, and periclinal wall pattern. Seed shapes were categorized as obovate, spherical, spheroid, broadly elliptic, elliptic and oblong, mostly with a terminal hilum. Seed colours were black, light brown, dark brown, brown and yellow. Exo-morphological characters, i.e. epidermal cell arrangements, included irregular, wavy pentagonal-hexagonal, regular pentagonal-hexagonal. Cluster analysis was used to assess similar and distinct species within Salvia with a feasible explanation. Taxonomic keys were made based on micromorphological qualitative features that help to delimit species and identify them quickly within the Salvia genus. Seed morphology of ten Salvia species was described and investigated, and the diagnostic significance of features evaluated using SEM. This study analysed seed features, especially at the species level, which might provide much new taxonomic information. The results revealed that, in seed morphology, using SEM can help with taxon identification, especially at the genus and species levels.
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Affiliation(s)
- S Jabeen
- Department of Plant Systematics and Biodiversity Lab Quaid-i-Azam University, Islamabad, Pakistan
| | - M Zafar
- Department of Plant Systematics and Biodiversity Lab Quaid-i-Azam University, Islamabad, Pakistan
| | - M Ahmad
- Department of Plant Systematics and Biodiversity Lab Quaid-i-Azam University, Islamabad, Pakistan
- Pakistan Academy of Sciences, Islamabad, Pakistan
| | - A T Althobaiti
- Department of Biology, College of Science, Taif University, Taif, Saudi Arabia
| | - F A Ozdemir
- Bingöl University Faculty of Science and Literature - Department of Molecular Biology and Genetics, Bingol, Turkey
| | - M A Kutlu
- Beekeeping Research Development Applications Centre Offices, Bingol University, Bingol, Turkey
| | - T K Makhkamov
- Department of forestry and landscape design, Tashkent State Agrarian University, Tashkent Region, Uzbekistan
| | - S Sultana
- Department of Plant Systematics and Biodiversity Lab Quaid-i-Azam University, Islamabad, Pakistan
| | - M Ameen
- Department of Plant Systematics and Biodiversity Lab Quaid-i-Azam University, Islamabad, Pakistan
| | - S Majeed
- Department of Plant Systematics and Biodiversity Lab Quaid-i-Azam University, Islamabad, Pakistan
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Shoaib M, Chomayil Y, Zafar M. Corneal abrasion due to face mask in children: A novel and potential mechanism of injury related to COVID 19 pandemic. Visual Journal of Emergency Medicine 2022; 27:101290. [PMID: 35308132 PMCID: PMC8920910 DOI: 10.1016/j.visj.2022.101290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 02/25/2022] [Accepted: 03/13/2022] [Indexed: 11/06/2022]
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Zafar M, Awan FR, Mirza MR, Nishat S, Rajput SA, Malik IR. Mining the SNPs of Human Low Density Lipoprotein (LDL) related Gene APOB through in silico Approaches. PAK J ZOOL 2022. [DOI: 10.17582/journal.pjz/20210713140738] [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: 11/24/2022]
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Zafar M, Mirza MR, Awan FR, Tahir M, Sultan R, Hussain M, Bilal A, Abbas S, Larsen MR, Choudhary MI, Malik IR. Effect of APOB polymorphism rs562338 (G/A) on serum proteome of coronary artery disease patients: a "proteogenomic" approach. Sci Rep 2021; 11:22766. [PMID: 34815491 PMCID: PMC8610978 DOI: 10.1038/s41598-021-02211-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 11/09/2021] [Indexed: 11/08/2022] Open
Abstract
In the current study, APOB (rs1052031) genotype-guided proteomic analysis was performed in a cohort of Pakistani population. A total of 700 study subjects, including Coronary Artery Disease (CAD) patients (n = 480) and healthy individuals (n = 220) as a control group were included in the study. Genotyping was carried out by using tetra primer-amplification refractory mutation system-based polymerase chain reaction (T-ARMS-PCR) whereas mass spectrometry (Orbitrap MS) was used for label free quantification of serum samples. Genotypic frequency of GG genotype was found to be 90.1%, while 6.4% was for GA genotype and 3.5% was for AA genotypes in CAD patients. In the control group, 87.2% healthy subjects were found to have GG genotype, 11.8% had GA genotype, and 0.9% were with AA genotypes. Significant (p = 0.007) difference was observed between genotypic frequencies in the patients and the control group. The rare allele AA was found to be strongly associated with the CAD [OR: 4 (1.9-16.7)], as compared to the control group in recessive genetic model (p = 0.04). Using label free proteomics, altered expression of 60 significant proteins was observed. Enrichment analysis of these protein showed higher number of up-regulated pathways, including phosphatidylcholine-sterol O-acyltransferase activator activity, cholesterol transfer activity, and sterol transfer activity in AA genotype of rs562338 (G>A) as compared to the wild type GG genotype. This study provides a deeper insight into CAD pathobiology with reference to proteogenomics, and proving this approach as a good platform for identifying the novel proteins and signaling pathways in relation to cardiovascular diseases.
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Affiliation(s)
- Muneeza Zafar
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences ICCBS), University of Karachi, Karachi, 75270, Pakistan
- Department of Biotechnology, University of Sargodha, Sargodha, Pakistan
- Diabetes and Cardio-Metabolic Disorders Lab, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, P.O. Box. 577, Faisalabad, Pakistan
| | - Munazza Raza Mirza
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences ICCBS), University of Karachi, Karachi, 75270, Pakistan.
| | - Fazli Rabbi Awan
- Diabetes and Cardio-Metabolic Disorders Lab, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, P.O. Box. 577, Faisalabad, Pakistan.
| | - Muhammad Tahir
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Rabia Sultan
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences ICCBS), University of Karachi, Karachi, 75270, Pakistan
| | - Misbah Hussain
- Department of Biotechnology, University of Sargodha, Sargodha, Pakistan
- Diabetes and Cardio-Metabolic Disorders Lab, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, P.O. Box. 577, Faisalabad, Pakistan
| | - Ahmed Bilal
- Allied Hospital, Faisalabad Medical University, Faisalabad, Pakistan
| | - Shahid Abbas
- Faisalabad Institute of Cardiology (FIC), Faisalabad, Pakistan
| | - Martin R Larsen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Muhammad Iqbal Choudhary
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences ICCBS), University of Karachi, Karachi, 75270, Pakistan
| | - Imran Riaz Malik
- Department of Biotechnology, University of Sargodha, Sargodha, Pakistan.
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Adnan M, Zafar M, Trivedi C, Beg U. Transcranial magnetic stimulation in the management of autism spectrum disorder: Narrative review. Eur Psychiatry 2021. [PMCID: PMC9475652 DOI: 10.1192/j.eurpsy.2021.1313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Introduction Fifty years ago, the estimated prevalence of autism was 30-60 per 10,000; now, it has increased to 18.5 per 1,000. Autism disorders are 4.3 times as prevalent among boys as among girls. Objectives This systematic review provides an overview of the management of AD with Transcranial Magnetic Stimulation. Methods A systematic review was conducted using (“Autism spectrum disorder” AND “Repetitive Transcranial Magnetic stimulation” AND “RTMS” OR “Children and adolescent”) in PubMed, Embase, and PsycINFO, resulted in 453 hits and finally qualified 18 studies. Results We found 18 eligible studies, 8 randomize controlled clinical trials, 10 non-controlled clinical trials comparing TMS effects with waiting-list controls (n = 6), sham-treatment (n = 8) and no control group (n=4). There was a significant reduction of repetitive, stereotyped behaviors, irritability, social behavior, and executive function improvements with a medium-size effect. Eleven studies in this review had a moderate to high risk of bias due to small sample size, lack of blinding to treatment, and inadequate follow-up period. Four studies reported the stability of these gains in clinical outcomes for more than six months with no clarification after that. Conclusions The data encourages the potential safety and efficacy; it provides significant evidence to support TMS’s efficacy in symptom severity reductions and improved clinical outcomes in children with autism. Therefore, future large-scale randomized controlled trials are required to conclude intervention efficacy in a larger sample size further.
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Munir M, Ahmad M, Rehan M, Saeed M, Lam SS, Nizami AS, Waseem A, Sultana S, Zafar M. Production of high quality biodiesel from novel non-edible Raphnus raphanistrum L. seed oil using copper modified montmorillonite clay catalyst. Environ Res 2021; 193:110398. [PMID: 33127396 DOI: 10.1016/j.envres.2020.110398] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 09/03/2020] [Accepted: 10/15/2020] [Indexed: 06/11/2023]
Abstract
This study focused on producing high quality and yield of biodiesel from novel non-edible seed oil of abundantly available wild Raphnus raphanistrum L. using an efficient, recyclable and eco-friendly copper modified montmorillonite (MMT) clay catalyst. The maximum biodiesel yield of 83% was obtained by base catalyzed transesterification process under optimum operating conditions of methanol to oil ratio of 15:1, reaction temperature of 150 °C, reaction time of 5 h and catalyst loading of 3.5%. The synthesized catalyst and biodiesel were characterized for their structural features and chemical compositions using various state-of-the-art techniques, including x-ray diffraction, scanning electron microscopy, energy dispersive x-ray spectroscopy, Fourier transform infrared spectroscopy, nuclear magnetic resonance (1H, 13C) and gas chromatography-mass spectroscopy. The fuel properties of the biodiesel were estimated including kinematic viscosity (4.36 cSt), density (0.8312 kg/L), flash point (72 °C), acid value (0.172 mgKOH/g) and sulphur content (0.0002 wt.%). These properties were compared and found in good agreement with the International Biodiesel Standards of American (ASTM-951, 6751), European Committee (EN-14214) and China GB/T 20828 (2007). The catalyst was re-used in five consecutive transesterification reactions without losing much catalytic efficiency. Overall, non-edible Raphnus raphanistrum L.. seed oil and Cu doped MMT clay catalyst appeared to be highly active, stable, and cheap contenders for future biofuel industry. However, detailed life cycle assessment (LCA) studies of Raphnus raphanistrum L. seed oil biodiesel are highly recommended to assess the technical, ecological, social and economic challenges.
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Affiliation(s)
- M Munir
- Biodiesel Lab, Department of Plant Sciences, Quaid-i-Azam University, 45320, Islamabad, Pakistan
| | - M Ahmad
- Biodiesel Lab, Department of Plant Sciences, Quaid-i-Azam University, 45320, Islamabad, Pakistan; Pakistan Academy of Sciences, Pakistan.
| | - M Rehan
- Center of Excellence in Environmental Studies (CEES), King Abdulaziz University, Jeddah, Saudi Arabia.
| | - M Saeed
- Analytical Lab, Department of Chemistry, Quaid-i-Azam University, 45320, Islamabad, Pakistan
| | - Su Shiung Lam
- Pyrolysis Technology Research Group, Institute of Tropical Aquaculture and Fisheries (Akuatrop), Universiti Malaysia Terengganu, 21030, Kuala Terengganu, Terengganu, Malaysia.
| | - A S Nizami
- Sustainable Development Study Centre, Government College University, Lahore, 54000, Pakistan
| | - A Waseem
- Pakistan Academy of Sciences, Pakistan
| | - S Sultana
- Biodiesel Lab, Department of Plant Sciences, Quaid-i-Azam University, 45320, Islamabad, Pakistan
| | - M Zafar
- Biodiesel Lab, Department of Plant Sciences, Quaid-i-Azam University, 45320, Islamabad, Pakistan
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Dogar A, Ullah K, Uddin S, Memon Y, Zafar M, Bilal H, Shoaib A, Ghaffar A, Hasnain S, Soomro Q. Per-Cutaneous Trans-splenic Vein Thrombolysis of Acute Major Portal Vein Thrombosis in Post-Liver Transplant Recipient: A Unique Experience. Int J Organ Transplant Med 2021; 12:32-36. [PMID: 35509724 PMCID: PMC9013494] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023] Open
Abstract
Portal venous thrombosis (PVT) is an uncommon complication in post-liver transplant recipients. The reported incidence is 1-4%. It may occur within a month, called early or after one month of transplantation, known as late PVT. Early PVT has a poor prognosis, leading to graft failure in most cases. Treatment of such cases is quite challenging because of difficult alternative portal inflow establishment. We performed successful thrombolysis of acute major PVT with a unique technique using ultrasound-guided percutaneous trans-splenic vein access in a post-liver transplant recipient. The per-cutaneous trans- splenic vein approach-based thrombolysis described here in this report might be very helpful in similar cases. This technique minimizes the potential risk of graft loss, avoids re-exploration, has a low risk of bleeding, and is cost-effective.
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Affiliation(s)
- A. Dogar
- Liver Transplant and HBP Department, Pir Abdul Qadir Shah Jeelani Institute of Medical Sciences, Pakistan
| | - K. Ullah
- Liver Transplant and HBP Department, Pir Abdul Qadir Shah Jeelani Institute of Medical Sciences, Pakistan
| | - Sh. Uddin
- Liver Transplant and HBP Department, Pir Abdul Qadir Shah Jeelani Institute of Medical Sciences, Pakistan
| | - Y. Memon
- Radiology Unit, Pir Abdul Qadir Shah Jeelani Institute of Medical Sciences, Pakistan
| | - M. Zafar
- Radiology Unit, Pir Abdul Qadir Shah Jeelani Institute of Medical Sciences, Pakistan
| | - H. Bilal
- Liver Transplant and HBP Department, Pir Abdul Qadir Shah Jeelani Institute of Medical Sciences, Pakistan
| | - A. Shoaib
- Liver Transplant and HBP Department, Pir Abdul Qadir Shah Jeelani Institute of Medical Sciences, Pakistan
| | - A. Ghaffar
- Liver Transplant and HBP Department, Pir Abdul Qadir Shah Jeelani Institute of Medical Sciences, Pakistan
| | - S. Hasnain
- Liver Transplant and HBP Department, Pir Abdul Qadir Shah Jeelani Institute of Medical Sciences, Pakistan
| | - Q. Soomro
- Liver Transplant and HBP Department, Pir Abdul Qadir Shah Jeelani Institute of Medical Sciences, Pakistan
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Shakil M, Arshad H, Zafar M, Rizwan M, Gillani SSA, Ahmed S. First-principles computation of new series of quaternary Heusler alloys CoScCrZ (Z = Al, Ga, Ge, In): a study of structural, magnetic, elastic and thermal response for spintronic devices. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1789770] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- M. Shakil
- Department of Physics, University of Gujrat, Gujrat, Pakistan
| | - Hafsa Arshad
- Department of Physics, University of Gujrat, Gujrat, Pakistan
| | - M. Zafar
- Department of Physics, Govt. Rizviya Islamia Post Graduate College Haroon Abad, Punjab, Pakistan
| | - M. Rizwan
- Department of Physics, University of Gujrat, Gujrat, Pakistan
| | - S. S. A. Gillani
- Department of Physics, Govt. College University, Lahore, Pakistan
| | - Shabbir Ahmed
- Department of Physics, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
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13
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Zafar M, Rana M, Zahid M, Malik M, Lodhi M. Mathematical Analysis of Roll Coating Process by Using Couple Stress Fluid. j nanofluids 2019. [DOI: 10.1166/jon.2019.1723] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this article, an incompressible isothermal model of a couple stress fluid between two rotating rolls is developed. Lubrication approximation theory is applied to simplify the flow equations. Exact solutions for velocity and pressure profiles are derived. Parameters of an industrial
interest like pressure, separating force, coating thickness, detachment point and power transmitted by the rolls to the fluid are computed numerically. It is observed that the flow parameter is a controlling parameter for an exiting coating thickness. As the problem is symmetric, only one
half of the geometry is considered.
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Zafar M, Baber U, Smith D, Sartori S, Contreras J, Rey-Mendoza J, Linares-Koloffon C, Escolar G, Mehran R, Fuster V, Badimon J. Antithrombotic potency of ticagrelor versus clopidogrel in type-2 diabetic patients with cardiovascular disease. Thromb Haemost 2017; 117:1981-1988. [DOI: 10.1160/th17-04-0277] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 06/26/2017] [Indexed: 11/05/2022]
Abstract
SummaryType-2 Diabetes Mellitus [T2DM] is associated with increased platelet reactivity and hypo-response to antiplatelet drugs. Ticagrelor, with its faster and more potent antiplatelet effects, was shown to reduce adverse events more than clopidogrel in the overall CAD patient population of PLATO trial, but the benefits did not reach statistical significance in the T2DM subgroup. To better understand these findings, we compared the antithrombotic effects of ticagrelor versus with clopidogrel in T2DM patients with cardiovascular disease. In a randomized, 2 treatment-sequence, crossover-design, T2DM patients (n=20, 57±8 years, 60% male) received a loading-dose [LD] plus one week of daily-therapy [DT] of clopidogrel or ticagrelor. Treatment effects were assessed by measuring thrombus formation (Badimon Chamber) and platelet aggregation (Multiple Electrode Aggregometry (MEA) Analyzer and VerifyNow®) at 2- and 6-hour post-LD and on Day-7 of DT, in comparison with pre-treatment baseline. After 2 weeks of washout, patients switched to the second treatment under identical testing conditions. Ticagrelor significantly reduced thrombus formation versus baseline at 2- and 6-hour post-LD and Day-7 of DT (33%, 40% and 31%, respectively, p<0.01 for all) whereas thrombus reductions with clopidogrel were much lower and significant only at 6-hour post-LD (16%, 20% and 17%, respectively). Antithrombotic effect of ticagrelor at 6-hour was significantly stronger than clopidogrel (p<0.05). Platelet aggregation (MEA and VerifyNow®) was inhibited by both treatments but effects of ticagrelor were significantly stronger at each time-point. Ticagrelor exhibits a faster and more potent antithrombotic effect than clopidogrel in T2DM patients with cardiovascular disease, supporting its use in this population.Clinical Trial Registration: Unique Identifier: NCT01823510.Supplementary Material to this article is available online at www.thrombosis-online.com.
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Farasat T, Sharif S, Manzoor F, Zafar M, Naz S. Prevalence of Retinopathy Detected by Fundoscopy among Newly Diagnosed Type 2 Diabetic Patients Visiting a Local Hospital in Lahore. PAK J ZOOL 2017. [DOI: 10.17582/journal.pjz/2017.49.1.345.349] [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: 11/24/2022]
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Rashed-Nizam Q, Rahman M, Tafader M, Zafar M, Bhuian A, Khan R, Kamal M, Chowdhury M, Alam M. Radiological risk analysis of sediment from Kutubdia island, Bangladesh due to natural and anthropogenic radionuclides. INT J RADIAT RES 2016. [DOI: 10.18869/acadpub.ijrr.14.4.373] [Citation(s) in RCA: 4] [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: 11/09/2022]
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Younus M, Abbas T, Zafar M, Raza S, Khan A, Saleem AH, Idrees MA, Nisa QU, Akhtar R, Saleem G. Assessment of heavy metal contamination in raw milk for human consumption. S AFR J ANIM SCI 2016. [DOI: 10.4314/sajas.v46i2.7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Fabry T, Peterss S, Luehr M, Zafar M, Guenther S, Dumfarth J, Ziganshin B, Pichlmaier M, Hagl C, Elefteriades J. Aortic Root Reoperation after Aortic and Aortic Valve Surgery. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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A S, Rahim S, Bhatti KH, Khan A, Din N, Imran M, Mohsin M, Ishtiaq M, Nabila A, Ansari A, Hussain S, Zafar M, Mushtaq M, Mumtaz E, Iqbal J. Ethnobotanical study and conservation status of trees in the district Sargodha, Punjab, Pakistan. ACTA ACUST UNITED AC 2015. [DOI: 10.32604/phyton.2015.84.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Zafar M, Kumar S, Kumar S, Dhiman AK, Park HS. Maintenance-energy-dependent dynamics of growth and poly(3-hydroxybutyrate) [P(3HB)] production by Azohydromonas lata MTCC 2311 using simple and renewable carbon substrates. Braz J Chem Eng 2014. [DOI: 10.1590/0104-6632.20140312s00002434] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- M. Zafar
- Shobhit University, India; University of Ulsan, Republic of Korea
| | - S. Kumar
- Indian Institute of Technology Roorkee, India
| | - S. Kumar
- Indian Institute of Technology Roorkee, India
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Yasin S, Luckham PF, Iqbal T, Zafar M, Ramzan N. Adsorption and Rheology of Graphitic Carbon Black Nonaqueous Dispersions Prepared Using Nonionic Surfactants. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2012.683978] [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: 10/26/2022]
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Yasin S, Luckham PF, Iqbal T, Zafar M. Scaling in Electrical Conductivity Measurements and Rheological Measurements of Monarch 700 Dispersions Stabilized by Polymers. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2011.635525] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Affiliation(s)
- M. Zafar
- Indian Institute of Technology Roorkee, India
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24
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Zafar N, Zafar M. P685 A study to ascertain the knowledge, attitude and practice about breast cancer and its prevention among a diverse group of Pakistani women. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)62176-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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25
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Shafiq M, Tanwir M, Tariq A, Kasi PM, Zafar M, Saleem A, Rehman R, Zaidi SZ, Taj F, Khuwaja AA, Shaikh KS, Khuwaja AK. Epilepsy: public knowledge and attitude in a slum area of Karachi, Pakistan. Seizure 2007; 16:330-7. [PMID: 17379542 DOI: 10.1016/j.seizure.2007.02.002] [Citation(s) in RCA: 26] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2006] [Revised: 05/12/2006] [Accepted: 02/20/2007] [Indexed: 10/23/2022] Open
Abstract
BACKGROUND Epilepsy is a common but widely misunderstood illness. Consequently, epileptics suffer from considerable stigmatization in society. Since no studies have detailed the misperceptions about epilepsy in our community, it is not possible to provide focused intervention aimed at eliminating this prejudice. PURPOSE To assess the knowledge and attitude regarding epilepsy in an adult population of a Karachi slum area. METHODS A face-to-face interview was conducted on 487 consenting adult non-epileptics (305 males; 182 females) who were conveniently sampled. Chi-square test was employed to calculate the variability in knowledge and attitude with demographic and other variables. RESULTS In all, 12.5% had never heard about epilepsy. Among the rest, 66.7% identified epilepsy as being non-infectious, while 28.2% were unaware of any treatment available for it. Among the other 71.8%, 62.7% were aware of the existence of anti-epileptic drugs. Religious/spiritual treatment was chosen as the most effective treatment by 33.1%. Males were more likely to identify epilepsy as being non-infectious (p=0.02). Nearly 18% of the respondents would not object to their child marrying an epileptic, 69.5% did not want to socially isolate the epileptics, 83.1% said epileptics could receive academic education, 85.6% said they could perform activities of daily life and 62.4% said they could become useful members of the society. Those who considered epilepsy to be infectious were more likely to carry negative attitudes towards epilepsy (p<0.01 with four attitudes). CONCLUSIONS Considerable gaps exist in the community's knowledge about epilepsy. Some of these may explain the prevalence of negative attitudes towards this ailment.
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Affiliation(s)
- M Shafiq
- Class of 2006, Aga Khan University Medical College, Stadium Road, Karachi 74800, Pakistan.
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Zafar M, Alappat BJ. Landfill surface runoff and its effect on water quality on river Yamuna. J Environ Sci Health A Tox Hazard Subst Environ Eng 2004; 39:375-384. [PMID: 15027821 DOI: 10.1081/ese-120027529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
During 2000, the estimated quantity of solid waste generated in Delhi, India was more than 9000 tones per day. This is one of the biggest sources of environmental degradation in capital city of India. Since 1950's over 12 large landfill have been packed with all kinds of nonbiodegradable and toxic waste of Delhi. The area covered is at least 1% (14.83 square kilometer) of total Delhi's area. All the landfill sites except Tilak Nagar, Hastal, and Chattarpur are located very closely (0.5-6 km) to the river Yamuna. It contributes the pollution to river Yamuna in a significant way in a form of surface runoff from landfill site especially in rainy season. The chemical analysis of leachate produced by these landfill sites and corresponding river section (at five river points) has been performed for 16 selected parameter (Temperature, Odor, pH, Turbidity, Conductivity, COD, Total Solids, Sulphide, Chloride, Nitrate, Iron) in the first stage and for 8 parameters (pH, Conductivity, COD, Total Solids, Chloride, Nitrate, Iron) in second stage. The study was conducted between August to October, 2000 (rainy season). It is clear from the study that the river water quality is affected by the presence of landfill surface runoff. Its impact can be seen in the region where the drains are meeting the river. This is one of the causes of river pollution apart from other major municipal and industrial sources.
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Affiliation(s)
- M Zafar
- Department of Civil Engineering, College of Engineering and Petroleum, Kuwait University, Safat, Kuwait.
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Turgay A, Tong L, Ansari R, Khosroshahi H, Ng D, Zafar M, Jagdeo J, Azzopardi P. Age, Gender, Subtype and Comorbidity Relations in 1000 Children and Adolescents with Adhd. Paediatr Child Health 2002. [DOI: 10.1093/pch/7.suppl_a.34ab] [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: 11/13/2022] Open
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Abstract
Previous studies have shown that supplemental grasp-force feedback can improve control for users of a hand prosthesis or neuroprosthesis under conditions where vision provides little force information. Visual cues of force are widely available in everyday use, however, and may obviate the utility of supplemental force information. The purpose of the present study was to use a video-based hand neuroprosthesis simulator to determine whether grasp-force feedback can improve control in the presence of realistic visual information. Seven able-bodied subjects used the simulator to complete a simple grasp-and-hold task while controlling and viewing pre-recorded, digitised video clips of a neuroprosthesis user's hand squeezing a compliant object. The task was performed with and without supplemental force feedback presented via electrocutaneous stimulation. Subjects had to achieve and maintain the (simulated) grasp force within a target window of variable size (+/- 10-40% of full scale). Force feedback improved the success rate significantly for all target window sizes (8-16%, on average), and improved the success rate at all window sizes for six of the seven subjects. Overall, the improvement was equivalent functionally to a 35% increase in the window size. Feedback also allowed subjects to identify the direction of grasp errors more accurately, on average by 10-15%. In some cases, feedback improved the failure identification rate even if success rates were unchanged. It is thus concluded that supplemental grasp-force feedback can improve grasp control even with access to rich visual information from the hand and object.
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Affiliation(s)
- M Zafar
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, USA
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Sharma AK, Shekhawat NS, Sharma SB, Upadhyay A, Agarwal RK, Zafar M, Harjai MM. Fixation anomaly at duodenojejunal junction. Indian Pediatr 1996; 33:600-2. [PMID: 8979575] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- A K Sharma
- Department of Pediatric Surgery, S.P. Mother and Child Health Institute, S.M.S. Medical College, Jaipur
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Abstract
Estrogen affects the synthesis and release of several pituitary hormones. The estrogen receptor (ER), a member of the steroid hormone receptor family, is thought to mediate transcriptional effects in a cell-specific fashion. We investigated whether ER is expressed in specific hormone-producing cell types in the human pituitary and its adenomas. Pituitary adenomas (n = 34) were collected at the time of surgery, and normal glands were obtained from autopsy. Expression of ER messenger ribonucleic acid (mRNA) was determined by reverse transcription-polymerase chain reaction (RT-PCR) and in situ hybridization. ER was also localized with immunohistochemistry and protein extraction. By RT-PCR, ER mRNA was found in the nontumorous pituitary and in pituitary adenomas expressing only PRL, in those producing GH and PRL, and in adenomas expressing the gonadotropic hormones. No ER mRNA was detected in adenomas expressing only GH without PRL or gonadotropins, nor in tumors producing ACTH without PRL or gonadotropins. In situ hybridization was not as sensitive or specific as RT-PCR. Biochemical analysis performed on seven tumors that were positive for ER mRNA by RT-PCR detected ER protein in only one PRL adenoma and one oncocytoma and yielded negative or equivocal results in one PRL adenoma, three GH-PRL adenomas, and one null cell adenoma. ER protein was localized by immunohistochemistry in scattered cells of the nontumorous adenohypophysis and in a few PRL and gonadotroph adenomas. We conclude that ER expression, as determined by RT-PCR, correlates with the expression of PRL or gonadotropins; in contrast, ER mRNA was not detected in adenomas that express only GH or ACTH. These findings implicate ER as a cell-specific transcription factor that may regulate cytodifferentiation in the pituitary.
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Affiliation(s)
- M Zafar
- Department of Pathology, Mount Sinai Hospital, Toronto, Ontario, Canada
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Al-Fadda M, Zafar M, Ayub A, al-Kahtani K. Idiopathic chronic active hepatitis: a diagnostic and therapeutic dilemma. J Clin Gastroenterol 1994; 19:313-7. [PMID: 7876513 DOI: 10.1097/00004836-199412000-00012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A 56-year-old Saudi male was admitted with abnormal liver chemistry values and a > 5-month history of lethargy, malaise, anorexia, and jaundice. Extensive investigations did not establish an etiological diagnosis. Liver histology confirmed the clinically apparent aggressive hepatitis with fibrosis but gave no clue to its etiology. The patient was empirically treated with alpha-interferon for presumed non-A, non-B hepatitis, with clinical and biochemical worsening. Interferon was discontinued and the patient was started on immunosuppression. Dramatic clinical and biochemical improvement occurred, with normalization of the liver chemistry within 4 weeks. The patient has been followed-up for 12 months and has not suffered a relapse. This case highlights the etiological heterogeneity of chronic active hepatitis. The entity of autoimmune chronic active hepatitis is unclear, and perhaps it is better defined as steroid-responsive hepatitis. Steroid-responsive hepatitis should always be considered in cases of cryptogenic chronic active hepatitis.
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Affiliation(s)
- M Al-Fadda
- Department of Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
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Affiliation(s)
- A Ayub
- Department of Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh, Kingdom of Saudi Arabia
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Sieck JO, Ellis ME, Alfurayh O, Ali MA, Ali HA, Ayub A, al-Fadda M, Zafar M, Halim M, Bernvil SS. Histologically advanced chronic hepatitis C treated with recombinant alpha-interferon: a randomized placebo-controlled double-blind cross-over study. J Hepatol 1993; 19:418-23. [PMID: 7512110 DOI: 10.1016/s0168-8278(05)80552-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Chronic hepatitis C is common in Saudi Arabia and most often presents in an advanced stage. To assess the response of patients to interferon, a randomized placebo-controlled double-blind study was undertaken. All but 1 patient had cirrhosis or fibrosis before interferon. After a 24-week observation period patients received alpha 2a interferon, 3 mega units sc tiw or placebo for 24 weeks, then the opposite treatment for another 24 weeks followed by 24 weeks of observation. Liver biopsies were performed before and after each of the treatment phases. Twenty-two out of 24 patients completed the study. The mean alanine aminotransferase (ALT) levels fell from 150.7 +/- 118.7 units/l to 91.0 +/- 42.6 units/l after 6 months interferon treatment (P = 0.03) but only 3 patients (14%) had complete normalization of mean ALT levels and 4 (18%) had > 50% reduction. The mean hepatitis activity index fell from 12.2 +/- 2.6 immediately before to 11.6 +/- 2.5 just after interferon (P = 0.4). After interferon there was an insignificant raise in 6-month mean ALT. Hepatitis C virus-RNA was positive in all 17 patients tested and remained so after treatment. Side-effects were mild and well tolerated. Alpha interferon 3 mega units tiw for 24 weeks is not an effective treatment of histologically advanced chronic hepatitis C.
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Affiliation(s)
- J O Sieck
- Department of Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
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Ayub A, Zafar M, Abdulkareem A, Ali MA, Lingawi T, Harbi A. Primary hepatic vipoma. Am J Gastroenterol 1993; 88:958-61. [PMID: 8389095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A 35-yr-old male presented with a 3-yr history of voluminous watery diarrhea. He had episodes of severe generalized weakness which responded to fluid and electrolyte replacement therapy. Investigations revealed a solitary liver mass and an elevated vasoactive intestinal polypeptide level. An extensive work-up did not show any other extrahepatic primary lesion. Surgical resection ameliorated all of his symptoms, accompanied by a decrease in the vasoactive intestinal polypeptide level. We believe that this patient represents a case of primary hepatic vipoma syndrome. To our present knowledge, this has not been reported previously. We discuss the clinical manifestations, investigations, and management of the case.
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Affiliation(s)
- A Ayub
- Department of Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
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Zafar M. Re: Chronic non-B, non-C hepatitis: report from Pakistan. Am J Gastroenterol 1993; 88:788-9. [PMID: 8480757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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37
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Zafar M, Reid ME. Review: The Diego blood group system. Immunohematology 1993; 9:35-40. [PMID: 15946085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Affiliation(s)
- M Zafar
- Immunohematology Laboratory, New York Blood Center, 310 East 67th Street, New York, NY 10021, USA
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Abstract
A total of 27,480 stool specimens from 15,548 patients with gastroenteritis were analyzed for bacterial enteropathogens during a 4-year period between 1986-89 at a major referral center in Saudi Arabia. Bacterial pathogens were isolated from 1,152 patients, Salmonella being the most frequent, followed by Campylobacter, Shigella, and Aeromonas hydrophila. The latter bacterium was found in 58 patients; seven of them were associated with other enteric pathogens, but A. hydrophila was the only organism in 51 patients. All had gastrointestinal symptoms, the most common being diarrhea (92%), followed by abdominal pain (68%), fever (37%), and vomiting (27%). Stool specimens from 1,368 control patients were negative for A. hydrophila.
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Affiliation(s)
- S M Qadri
- King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
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39
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Tufail A, Ahmad S, Khan AR, Zafar M, Shafi M. Nuclear interactions of 340-GeV pions in emulsion. Phys Rev D Part Fields 1990; 42:2187-2193. [PMID: 10013072 DOI: 10.1103/physrevd.42.2187] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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40
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Cooke RP, Zafar M, Haeney MR. Recurrent meningococcal meningitis associated with deficiencies of C8 and anti-meningococcal antibody. J Clin Lab Immunol 1987; 23:53-6. [PMID: 3112405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A patient with fatal recurrent meningococcal meningitis is described. Detailed complement and immunological investigation revealed a combined deficiency of C8 and anti-meningococcal antibody. An inability to make anti-meningococcal antibody in C8 deficient patients has not been previously reported.
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41
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Thies PW, Zafar M. Metoclopramide-induced fever. Clin Pharm 1986; 5:342-4. [PMID: 3709083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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42
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Zafar M. Surgical drains. J PAK MED ASSOC 1981; 31:219. [PMID: 6798230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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44
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Telischi M, Patel AR, Zafar M, Hoiberg R. Microaggregate counts in frozen-preserved erythrocytes: effects of washing in three blood processors and filtration. Blood 1977; 50:743-8. [PMID: 901943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Since microaggregates have been implicated in posttransfusion pulmonary insufficiency, their elimination has become an active concern in blood transfusion. Various types of filters, as well as frozen-preserved erythrocytes, have been used to provide blood relatively low in microaggregates. We have counted particles in frozen-stored blood before deglycerolization, after washing in each of three cell processing systems, and after filtration through a 40-micrometer filter. Washing frozen erythrocytes reduced the total particle counts by an average of 89%. Slight differences were found among the three blood processors with respect to particle removal. Passing washed blood through a 40-micrometer filter did not result in significant further reduction in particle counts. Hence, the use of such filters in a frozen-preserved blood system is not warranted.
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