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Khan K, Zafar S, Badshah Y, Ashraf NM, Rafiq M, Danish L, Shabbir M, Trembley JH, Afsar T, Almajwal A, Razak S. Cross talk of tumor protein D52 (TPD52) with KLF9, PKCε, and MicroRNA 223 in ovarian cancer. J Ovarian Res 2023; 16:202. [PMID: 37833790 PMCID: PMC10571360 DOI: 10.1186/s13048-023-01292-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 10/02/2023] [Indexed: 10/15/2023] Open
Abstract
BACKGROUND Gynecologic cancers comprise malignancies in the female reproductive organs. Ovarian cancer ranks sixth in terms of incidence rates while seventh in terms of mortality rates. The stage at which ovarian cancer is diagnosed mainly determines the survival outcomes of patients. Various screening approaches are presently employed for diagnosing ovarian cancer; however, these techniques have low accuracy and are non-specific, resulting in high mortality rates of patients due to this disease. Hence, it is crucial to identify improved screening and diagnostic markers to overcome this cancer. This study aimed to find new biomarkers to facilitate the prognosis and diagnosis of ovarian cancer. METHODS Bioinformatics approaches were used to predict the tertiary structure and cellular localization along with phylogenetic analysis of TPD52. Its molecular interactions were determined through KEGG analysis, and real-time PCR-based expression analysis was performed to assess its co-expression with another oncogenic cellular pathway (miR-223, KLF9, and PKCε) proteins in ovarian cancer. RESULTS Bioinformatics analysis depicted the cytoplasmic localization of TPD52 and the high conservation of its coiled-coil domains. Further study revealed that TPD52 mRNA and miRNA-223 expression was elevated, while the expression of KLF 9 and PKCε was reduced in the blood of ovarian cancer patients. Furthermore, TPD52 and miR-223 expression were upregulated in the early stages of cancer and non-metastatic cancers. CONCLUSION TPD52, miR-223, PKCε, and KLF9, can be used as a blood based markers for disease prognosis, metastasis, and treatment response. The study outcomes hold great potential to be translated at the clinical level after further validation on larger cohorts.
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Affiliation(s)
- Khushbukhat Khan
- Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan
| | - Sameen Zafar
- Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan
| | - Yasmin Badshah
- Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan
| | - Naeem Mahmood Ashraf
- School of Biochemistry & Biotechnology, University of the Punjab, Lahore, Pakistan
| | - Mehak Rafiq
- School of Interdisciplinary Engineering & Sciences (SINES), National University of Sciences and Technology, Islamabad, 44000, Pakistan
| | - Lubna Danish
- Agricultural Research Institute, Tarnab, Peshawar, Pakistan
| | - Maria Shabbir
- Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan.
- Department of Healthcare Biotechnology, Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology, Islamabad, Pakistan.
| | - Janeen H Trembley
- Research Service, Minneapolis VA Health Care System, Minneapolis, MN, USA
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | - Tayyaba Afsar
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Ali Almajwal
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Suhail Razak
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.
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Gouilly D, Rafiq M, Nogueira L, Salabert AS, Payoux P, Péran P, Pariente J. Beyond the amyloid cascade: An update of Alzheimer's disease pathophysiology. Rev Neurol (Paris) 2023; 179:812-830. [PMID: 36906457 DOI: 10.1016/j.neurol.2022.12.006] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 10/02/2022] [Accepted: 12/02/2022] [Indexed: 03/13/2023]
Abstract
Alzheimer's disease (AD) is a multi-etiology disease. The biological system of AD is associated with multidomain genetic, molecular, cellular, and network brain dysfunctions, interacting with central and peripheral immunity. These dysfunctions have been primarily conceptualized according to the assumption that amyloid deposition in the brain, whether from a stochastic or a genetic accident, is the upstream pathological change. However, the arborescence of AD pathological changes suggests that a single amyloid pathway might be too restrictive or inconsistent with a cascading effect. In this review, we discuss the recent human studies of late-onset AD pathophysiology in an attempt to establish a general updated view focusing on the early stages. Several factors highlight heterogenous multi-cellular pathological changes in AD, which seem to work in a self-amplifying manner with amyloid and tau pathologies. Neuroinflammation has an increasing importance as a major pathological driver, and perhaps as a convergent biological basis of aging, genetic, lifestyle and environmental risk factors.
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Affiliation(s)
- D Gouilly
- Toulouse Neuroimaging Center, Toulouse, France.
| | - M Rafiq
- Toulouse Neuroimaging Center, Toulouse, France; Department of Cognitive Neurology, Epilepsy and Movement Disorders, CHU Toulouse Purpan, France
| | - L Nogueira
- Department of Cell Biology and Cytology, CHU Toulouse Purpan, France
| | - A-S Salabert
- Toulouse Neuroimaging Center, Toulouse, France; Department of Nuclear Medicine, CHU Toulouse Purpan, France
| | - P Payoux
- Toulouse Neuroimaging Center, Toulouse, France; Department of Nuclear Medicine, CHU Toulouse Purpan, France; Center of Clinical Investigation, CHU Toulouse Purpan (CIC1436), France
| | - P Péran
- Toulouse Neuroimaging Center, Toulouse, France
| | - J Pariente
- Toulouse Neuroimaging Center, Toulouse, France; Department of Cognitive Neurology, Epilepsy and Movement Disorders, CHU Toulouse Purpan, France; Center of Clinical Investigation, CHU Toulouse Purpan (CIC1436), France
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Masood M, Masood MBE, Us Subah N, Shabbir M, Paracha RZ, Rafiq M. Investigating isoform switching in RHBDF2 and its role in neoplastic growth in breast cancer. PeerJ 2022; 10:e14124. [PMID: 36452073 PMCID: PMC9703992 DOI: 10.7717/peerj.14124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 09/06/2022] [Indexed: 11/27/2022] Open
Abstract
Background Breast cancer is the second leading cause of cancer-related deaths globally, and its prevalence rates are increasing daily. In the past, studies predicting therapeutic drug targets for cancer therapy focused on the assumption that one gene is responsible for producing one protein. Therefore, there is always an immense need to find promising and novel anti-cancer drug targets. Furthermore, proteases have an integral role in cell proliferation and growth because the proteolysis mechanism is an irreversible process that aids in regulating cellular growth during tumorigenesis. Therefore, an inactive rhomboid protease known as iRhom2 encoded by the gene RHBDF2 can be considered an important target for cancer treatment. Speculatively, previous studies on gene expression analysis of RHBDF2 showed heterogenous behaviour during tumorigenesis. Consistent with this, several studies have reported the antagonistic role of iRhom2 in tumorigenesis, i.e., either they are involved in negative regulation of EGFR ligands via the ERAD pathway or positively regulate EGFR ligands via the EGFR signalling pathway. Additionally, different opinions suggest iRhom2 mediated cleavage of EGFR ligands takes place TACE dependently or TACE independently. However, reconciling these seemingly opposing roles is still unclear and might be attributed to more than one transcript isoform of iRhom2. Methods To observe the differences at isoform resolution, the current strategy identified isoform switching in RHBDF2 via differential transcript usage using RNA-seq data during breast cancer initiation and progression. Furthermore, interacting partners were found via correlation and enriched to explain their antagonistic role. Results Isoform switching was observed at DCIS, grade 2 and grade 3, from canonical to the cub isoform. Neither EGFR nor ERAD was found enriched. However, pathways leading to TACE-dependent EGFR signalling pathways were more observant, specifically MAPK signalling pathways, GPCR signalling pathways, and toll-like receptor pathways. Nevertheless, it was noteworthy that during CTCs, the cub isoform switches back to the canonical isoform, and the proteasomal degradation pathway and cytoplasmic ribosomal protein pathways were significantly enriched. Therefore, it could be inferred that cub isoform functions during cancer initiation in EGFR signalling. In contrast, during metastasis, where invasion is the primary task, the isoform switches back to the canonical isoform.
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Affiliation(s)
- Mehar Masood
- School of Interdisciplinary Engineering and Sciences, National University of Sciences and Technology, Islamabad, Pakistan,Faculty of Rehabilitation & Allied Health Sciences, Riphah International University, Islamabad, Pakistan
| | - Madahiah Bint E Masood
- School of Interdisciplinary Engineering and Sciences, National University of Sciences and Technology, Islamabad, Pakistan
| | - Noor Us Subah
- School of Interdisciplinary Engineering and Sciences, National University of Sciences and Technology, Islamabad, Pakistan
| | - Maria Shabbir
- Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology, Islamabad, Pakistan
| | - Rehan Zafar Paracha
- School of Interdisciplinary Engineering and Sciences, National University of Sciences and Technology, Islamabad, Pakistan
| | - Mehak Rafiq
- School of Interdisciplinary Engineering and Sciences, National University of Sciences and Technology, Islamabad, Pakistan
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Pai V, Talukder S, Martinez L, Kydd A, Bhagra S, Lewis C, Parameshwar J, Messer S, Osman M, Virdi A, Cacciottolo P, Kaul P, Rafiq M, Allen J, Large S, Tsui S, Jenkins D, Pettit S, Berman M. Outcomes of Mechanical Circulatory Support for Severe Primary Graft Dysfunction After DBD versus DCD Heart Transplantation. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.109] [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: 10/18/2022] Open
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Onkaramurthy M, Vishwakarma KK, Singh P, Hegde S, Azeemuddin MM, Rafiq M, Babu UV. Herbal Formulations Ameliorates Chronic Venous Insufficiency, Venotonicity and Elastase Inhibition in the Management of Varicose Veins: A Preclinical Study. Indian J Pharm Sci 2022. [DOI: 10.36468/pharmaceutical-sciences.1000] [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: 11/22/2022] Open
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Ahmad A, Saeed A, Gulshan AB, Wali S, Hadi F, Ullah S, Fazlullah F, Sher AA, Rizwan M, Rafiq M. Prediction of soil seed bank of piedmont and alluvial environments of Dera Ghazi Khan, Punjab, Pakistan. BRAZ J BIOL 2021; 84:e255485. [PMID: 34878007 DOI: 10.1590/1519-6984.255485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Accepted: 09/30/2021] [Indexed: 11/22/2022] Open
Abstract
The current focus is on the overall pattern of seed storage present in the fragments of the soil of piedmont and alluvial landscapes of the environment. The present study predicted the seed banks of both soils of alluvial and piedmont zones in different ecological conditions and evaluate the potential of seeds in the restoration of both environments. The composition of the seed bank of soil is mainly affected by the alluvial environment and the structure of cleared area shows that more species of germinating annual grasses and growable seeds with the higher total number. Extant vegetation structures have an important role in the diversity of soil seed reservoirs, whose composition corresponded with the openness of the site. When in situ soil seed bank is recruited, it helps to restore only some components of the plant community in an alluvial environment. In our current research, it was confirmed that seed richness was higher in number at lower elevation (alluvial) than that at high elevation (piedmont). Seed richness showed a significant negative correlation with anions, cations, while significantly positive with altitude that suggests the richness pattern of the overall seed bank of the area is influenced by various environmental factors.
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Affiliation(s)
- A Ahmad
- Gomal University, Dera Ismail Khan, Khyber Pakhtunkhwa, Pakistan
| | - A Saeed
- Gomal University, Dera Ismail Khan, Khyber Pakhtunkhwa, Pakistan
| | - A B Gulshan
- Ghazi University, Department of Botany, D. G. Khan, Punjab, Pakistan
| | - S Wali
- Islamia College Peshawar, Department of Botany, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - F Hadi
- University of Peshawar, Department of Botany, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - S Ullah
- Islamia College Peshawar, Department of Botany, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - F Fazlullah
- Islamia College Peshawar, Department of Botany, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - A A Sher
- Islamia College Peshawar, Department of Botany, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - M Rizwan
- Islamia College Peshawar, Department of Botany, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - M Rafiq
- Government Degree College, Department of Botany, Dir Lower, Khyber Pakhtunkhwa, Pakistan
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Ahmad W, Abbas M, Rafiq M, Baleanu D. Mathematical analysis for the effect of voluntary vaccination on the propagation of Corona virus pandemic. Results Phys 2021; 31:104917. [PMID: 34722138 PMCID: PMC8536489 DOI: 10.1016/j.rinp.2021.104917] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/10/2021] [Accepted: 10/13/2021] [Indexed: 05/04/2023]
Abstract
In this manuscript, a new nonlinear model for the rapidly spreading Corona virus disease (COVID-19) is developed. We incorporate an additional class of vaccinated humans which ascertains the impact of vaccination strategy for susceptible humans. A complete mathematical analysis of this model is conducted to predict the dynamics of Corona virus in the population. The analysis proves the effectiveness of vaccination strategy employed and helps public health services to control or to reduce the burden of corona virus pandemic. We first prove the existence and uniqueness and then boundedness and positivity of solutions. Threshold parameter for the vaccination model is computed analytically. Stability of the proposed model at fixed points is investigated analytically with the help of threshold parameter to examine epidemiological relevance of the pandemic. We apply LaSalle's invariance principle from the theory of Lyapunov function to prove the global stability of both the equilibria. Two well known numerical techniques namely Runge-Kutta method of order 4 (RK4), and the Non-Standard Finite Difference (NSFD) method are employed to solve the system of ODE's and to validate our obtained theoretical results. For different coverage levels of voluntary vaccination, we explored a complete quantitative analysis of the model. To draw our conclusions, the effect of proposed vaccination on threshold parameter is studied numerically. It is claimed that Corona virus disease could be eradicated faster if a human community selfishly adopts mandatory vaccination measures at various coverage levels with proper awareness. Finally, we have executed the joint variability of all classes to understand the effect of vaccination strategy on a disease dynamics.
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Affiliation(s)
- W Ahmad
- Department of Mathematics, GC University, Lahore, Pakistan
| | - M Abbas
- Department of Mathematics, GC University, Lahore, Pakistan
| | - M Rafiq
- Department of Mathematics, Faculty of Sciences, University of Central Punjab Lahore, Pakistan
| | - D Baleanu
- Department of Mathematics, Cankaya University, Ankara, Turkey
- Institute of Space Sciences, Magurele, Bucharest, Romania
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
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Nisar M, Paracha RZ, Arshad I, Adil S, Zeb S, Hanif R, Rafiq M, Hussain Z. Integrated Analysis of Microarray and RNA-Seq Data for the Identification of Hub Genes and Networks Involved in the Pancreatic Cancer. Front Genet 2021; 12:663787. [PMID: 34262595 PMCID: PMC8273913 DOI: 10.3389/fgene.2021.663787] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 02/04/2021] [Accepted: 04/06/2021] [Indexed: 12/13/2022] Open
Abstract
Pancreatic cancer (PaCa) is the seventh most fatal malignancy, with more than 90% mortality rate within the first year of diagnosis. Its treatment can be improved the identification of specific therapeutic targets and their relevant pathways. Therefore, the objective of this study is to identify cancer specific biomarkers, therapeutic targets, and their associated pathways involved in the PaCa progression. RNA-seq and microarray datasets were obtained from public repositories such as the European Bioinformatics Institute (EBI) and Gene Expression Omnibus (GEO) databases. Differential gene expression (DE) analysis of data was performed to identify significant differentially expressed genes (DEGs) in PaCa cells in comparison to the normal cells. Gene co-expression network analysis was performed to identify the modules co-expressed genes, which are strongly associated with PaCa and as well as the identification of hub genes in the modules. The key underlaying pathways were obtained from the enrichment analysis of hub genes and studied in the context of PaCa progression. The significant pathways, hub genes, and their expression profile were validated against The Cancer Genome Atlas (TCGA) data, and key biomarkers and therapeutic targets with hub genes were determined. Important hub genes identified included ITGA1, ITGA2, ITGB1, ITGB3, MET, LAMB1, VEGFA, PTK2, and TGFβ1. Enrichment analysis characterizes the involvement of hub genes in multiple pathways. Important ones that are determined are ECM–receptor interaction and focal adhesion pathways. The interaction of overexpressed surface proteins of these pathways with extracellular molecules initiates multiple signaling cascades including stress fiber and lamellipodia formation, PI3K-Akt, MAPK, JAK/STAT, and Wnt signaling pathways. Identified biomarkers may have a strong influence on the PaCa early stage development and progression. Further, analysis of these pathways and hub genes can help in the identification of putative therapeutic targets and development of effective therapies for PaCa.
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Affiliation(s)
- Maryum Nisar
- Research Centre for Modeling and Simulation (RCMS), National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Rehan Zafar Paracha
- Research Centre for Modeling and Simulation (RCMS), National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Iqra Arshad
- Research Centre for Modeling and Simulation (RCMS), National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Sidra Adil
- Research Centre for Modeling and Simulation (RCMS), National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Sabaoon Zeb
- Research Centre for Modeling and Simulation (RCMS), National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Rumeza Hanif
- Atta-ur-Rahman School of Applied Biosciences-ASAB, National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Mehak Rafiq
- Research Centre for Modeling and Simulation (RCMS), National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Zamir Hussain
- Research Centre for Modeling and Simulation (RCMS), National University of Sciences and Technology (NUST), Islamabad, Pakistan
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Butt SS, Khan K, Badshah Y, Rafiq M, Shabbir M. Evaluation of pro-apoptotic potential of taxifolin against liver cancer. PeerJ 2021; 9:e11276. [PMID: 34113483 PMCID: PMC8162243 DOI: 10.7717/peerj.11276] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 03/24/2021] [Indexed: 12/13/2022] Open
Abstract
Liver cancer is the second most common cause of cancer-induced deaths worldwide. Liver cirrhosis and cancer are a consequence of the abnormal angio-architecture formation of liver and formation of new blood vessels. This angiogenesis is driven by overexpression of hypoxia-inducible factor 1-alpha (Hif1-α) and vascular endothelial growth factor (VEGF). Apart from this, protein kinase B (Akt) is also impaired in liver cancer. Despite the advancement in conventional treatments, liver cancer remains largely incurable. Nowadays, the use of naturally occurring anticancer agents particularly flavonoids is subject to more attention due to their enhanced physicochemical properties. Therefore, this study underlines the use of a natural anticancer agent taxifolin in the treatment of liver cancer using hepatocellular carcinoma cell line HepG2 and Huh7. The aim of our study is to devise a natural and efficient solution for the disease prevalent in Pakistan. The study involved the assessment of binding of ligand taxifolin using molecular docking. The binding of taxifolin with the proteins (Hif1-α, VEGF and Akt) was calculated by docking using Vina and Chimera. Further evaluation was performed by cell viability assay (MTT 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) Assay), colony formation assay, cell migration assay, DNA ladder assay and flow cytometry. To see whether taxifolin directly affected expression levels, analysis of gene expression of Hif1-α, VEGF and Akt was performed using real-time polymerase chain reaction (qPCR) and western blotting. In silico docking experiments revealed that these proteins showed favorable docking scores with taxifolin. Treatment with taxifolin resulted in the inhibition of the liver cancer growth and migration, and induced apoptosis in HepG2 and Huh7 cell lines at an inhibitory concentration (IC50) value of 0.15 µM and 0.22 µM, respectively. The expression of HIF1-α, VEGF and Akt was significantly reduced in a dose- dependent manner. The inhibitory effect of taxifolin on hepatic cells suggested its chemopreventive and therapeutic potential. The studied compound taxifolin exhibited pronounced pro-apoptotic and hepatoprotective potential. Our study has confirmed the pro-apoptotic potential of taxifolin in liver cancer cell lines and will pave a way to the use of taxifolin as a chemotherapeutic agent after its further validation on the animal models and humans based epidemiological studies.
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Affiliation(s)
- Sania Safdar Butt
- Atta-Ur-Rahman School of Applied Biosciences, National University of Sciences and Technology, Islamabad, Pakistan
| | - Khushbukhat Khan
- Atta-Ur-Rahman School of Applied Biosciences, National University of Sciences and Technology, Islamabad, Pakistan
| | - Yasmin Badshah
- Atta-Ur-Rahman School of Applied Biosciences, National University of Sciences and Technology, Islamabad, Pakistan
| | - Mehak Rafiq
- Research Centre for Modelling and Simulation, National University of Sciences and Technology, Islamabad, Pakistan
| | - Maria Shabbir
- Atta-Ur-Rahman School of Applied Biosciences, National University of Sciences and Technology, Islamabad, Pakistan
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Khan W, Naqvi SMHM, Khan HU, Rafiq M, Ahmad B, Ahmad B, Ahmad B, Noor A, Akhtar S, Shadman M. Feeding habit of Brown trout (Salmo trutta fario) in upper parts of river Swat, Pakistan. BRAZ J BIOL 2021; 82:e239219. [PMID: 33787749 DOI: 10.1590/1519-6984.239219] [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: 06/06/2020] [Accepted: 09/23/2020] [Indexed: 11/21/2022] Open
Abstract
Salmo trutta fario is the most important fish species of family Salmonidae inhibited in cool waters all over the world including the nortern parts of Pakistan. This study was aimed to find out the prey selection and feeding habits of the species. One hundred and eighty five Salmo trutta fario were captured from March 2016 to April 2017. Feeding intensity as represented by a fullness index (FI), changing with various length groups and season. Out of 185 Brown trout 24 fish stomaches were found empty. The most important and common food items of brown trout were Brachycentridae, Blepharocera, Hydropsychidae, ephemerella spp. Kruskal Wallis H-test were applied on feeding intensity groups consisting of three month group. The test statistic for K.W-H-test were (H=8.13 with df =3) had a p-value of 0.043 < (alpha=0.05 indicates favor of the alternative hypothesis of at least one difference among the feeding intensity groups. The linear relationship of N with index of relative importance and %IRI denoted by least square regression line (N = 35.2 + 22.1%IRI), shows that for 22 prey there is 1% change in IRI. The relationship between total length (mm) and fish body weight (gm) is expressed by Pearson correlation coefficient (r = 0.976), showed that total length (mm) and fish body weight (gm.) is highly correlated. Descriptive statistics are used for the stomach fullness, which shows that feeding intensity was recorded higher from March to May. A total of 2289 preys was recorded including the most common were; Trichoptera, Hydropsychidae, Brachycentridae, diptera, blepharocera, ephemerala, chironomida, honey bees, grass hopper, locust, trout egg, trochanter, plant tissue, stones were retrieved from the gut contents of brown trout. According to index of relative importance IRI% four preys represents major components of the diet. The highest IRI% was recorded in Brachycentridae (39.38%), followed by blepharocera (13.23%), Hydropsychidae (10.76%) and ephemerella spp (8.28%). The relationship between IRI and FO is (r =0.556) is moderately correlated with coefficient of determination (r2=0.31). This study will help in the development of an artificial diet for the species for better growth performance in captivity.
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Affiliation(s)
- W Khan
- University of Malakand, Department of Zoology, Lower Dir, Khyber Pakhtunkhwa, Pakistan
| | - S M H M Naqvi
- Southern Zone Agricultural Research Center - SARC, Outreach Research Activity Unit - ORAU, Karach, Pakistan
| | - H Ullah Khan
- University of Malakand, Department of Statistics, Lower Dir, Khyber Pakhtunkhwa, Pakistan
| | - M Rafiq
- University of Malakand, Department of Zoology, Lower Dir, Khyber Pakhtunkhwa, Pakistan
| | - B Ahmad
- University of Malakand, Department of Zoology, Lower Dir, Khyber Pakhtunkhwa, Pakistan
| | - B Ahmad
- Islamia College University, Peshawar, Department of Zoology, Peshawar, Pakistan
| | - B Ahmad
- University of Swabi, Department of Zoology, Swabi, Pakistan
| | - A Noor
- Karakoram International University Gilgit-Baltistan, Biological Sciences Department, Biltstan, Pakistan
| | - S Akhtar
- Hazara University, Department of Zoology, Mansehra, Pakistan
| | - M Shadman
- University of Malakand, Department of Zoology, Lower Dir, Khyber Pakhtunkhwa, Pakistan
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Ahmed N, Ali M, Rafiq M, Khan I, Nisar KS, Rehman MA, Ahmad MO. A numerical efficient splitting method for the solution of two dimensional susceptible infected recovered epidemic model of whooping cough dynamics: Applications in bio-medical engineering. Comput Methods Programs Biomed 2020; 190:105350. [PMID: 32078958 DOI: 10.1016/j.cmpb.2020.105350] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 10/27/2019] [Revised: 01/04/2020] [Accepted: 01/19/2020] [Indexed: 06/10/2023]
Abstract
Background and Objective The positivity property of the non-linear dynamical systems is one of the essential features in different fields of bio-medical engineering, science and many more. The state variables, involving in the models, describing the natural phenomenon such as concentration, density and population size etc. must be positive. Therefore, the computing techniques used to solve the system of non-linear differential equations must be consisted with the continuous nature of the models. But, unfortunately there are some existing techniques in the literature that do not preserve the positivity property, especially for the multi-space dimensional models. So there is a gap in the literature that should be filled up, by constructing the positivity preserving numerical algorithms. In this study, we consider a susceptible-infected-recovered (SIR) reaction diffusion epidemic model in two space dimensions from biomedical engineering and solved numerically to observe the behavior of the model. Since the state variables involved in this system are population densities therefore we design a novel computational method which is time efficient because of its splitting structure and holds the positivity as well as other important structure of epidemic system. Methods Three different computational techniques are designed to examine the numerical solution of SIR model of infectious disease. Two approaches are well-known existing computing methods named as forward Euler finite difference (FD) method and backward Euler operator splitting finite difference (OS-FD) method. The third approach is operator splitting nonstandard finite difference (OS-NSFD) method which is devised by using the NSFD rules. Results The proposed OS-NSFD technique retains efficiently the stability of equilibria as well as the positivity. Graphical behavior depicts that the existing computing methods can not get success to preserve the structure of the epidemic system of whooping cough dynamics. At the same time OS-NSFD computing method is proven to be reliable and suitable for the system of bio-medical engineering mathematically and graphically. Conclusion A reliable and novel computing technique is developed for the solution of two dimensional reaction diffusion problem. This technique preserves all the imperative characteristics of the model under study. Also the time efficiency of this method makes it easy to find the solution of physical system in two space dimension. The comparison with other techniques shows the efficacy and reliability of the designed technique.
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Affiliation(s)
- Nauman Ahmed
- Department of Mathematics, University of Management and Technology, Lahore, Pakistan; Department of Mathematics and Statistics, University of Lahore, Lahore, Pakistan
| | - Mubasher Ali
- School of Engineering and Digital Arts, University of Kent, Canterbury Kent, United Kingdom
| | - M Rafiq
- Faculty of Engineering, University of Central Punjab, Lahore, Pakistan
| | - Ilyas Khan
- Faculty of Mathematics and Statistics, Ton Duc Thang University, Ho Chi Minh City 72915 Vietnam.
| | - Kottakkaran Sooppy Nisar
- Department of Mathematics, College of Arts and Science at Wadi Aldawaser, Prince Sattam bin Abdulaziz University, Alkharj 11991, Kingdom of Saudi Arabia
| | - M A Rehman
- Department of Mathematics, University of Management and Technology, Lahore, Pakistan
| | - M O Ahmad
- Department of Mathematics and Statistics, University of Lahore, Lahore, Pakistan
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Butt SS, Badshah Y, Shabbir M, Rafiq M. Molecular Docking Using Chimera and Autodock Vina Software for Nonbioinformaticians. ACTA ACUST UNITED AC 2020. [DOI: 10.2196/14232] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In the field of drug discovery, many methods of molecular modeling have been employed to study complex biological and chemical systems. Experimental strategies are integrated with computational approaches for the identification, characterization, and development of novel drugs and compounds. In modern drug designing, molecular docking is an approach that explores the confirmation of a ligand within the binding site of a macromolecule. To date, many software and tools for docking have been employed. AutoDock Vina (in UCSF [University of California, San Francisco] Chimera) is one of the computationally fastest and most accurate software employed in docking. In this paper, a sequential demonstration of molecular docking of the ligand fisetin with the target protein Akt has been provided, using AutoDock Vina in UCSF Chimera 1.12. The first step involves target protein ID retrieval from the protein database, the second step involves visualization of the protein structure in UCSF Chimera, the third step involves preparation of the target protein for docking, the fourth step involves preparation of the ligand for docking, the fifth step involves docking of the ligand and the target protein as Mol.2 files in Chimera by using AutoDock Vina, and the final step involves interpretation and analysis of the docking results. By following the guidelines and steps outlined in this paper, researchers with no previous background in bioinformatics research can perform computational docking in an easier and more user-friendly manner.
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Ahmed N, Wei Z, Baleanu D, Rafiq M, Rehman MA. Spatio-temporal numerical modeling of reaction-diffusion measles epidemic system. Chaos 2019; 29:103101. [PMID: 31675795 DOI: 10.1063/1.5116807] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 09/09/2019] [Indexed: 06/10/2023]
Abstract
In this work, we investigate the numerical solution of the susceptible exposed infected and recovered measles epidemic model. We also evaluate the numerical stability and the bifurcation value of the transmission parameter from susceptibility to a disease of the proposed epidemic model. The proposed method is a chaos free finite difference scheme, which also preserves the positivity of the solution of the given epidemic model.
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Affiliation(s)
- Nauman Ahmed
- Department of Mathematics, University of Management and Technology, Lahore 54770, Pakistan
| | - Zhouchao Wei
- School of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China
| | - Dumitru Baleanu
- Department of Mathematics, Faculty of Arts and Sciences, Cankaya University, 06530 Ankara, Turkey
| | - M Rafiq
- Faculty of Engineering, University of Central Punjab, Lahore 54770, Pakistan
| | - M A Rehman
- Department of Mathematics, University of Management and Technology, Lahore 54770, Pakistan
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Affiliation(s)
| | - Mehak Rafiq
- University of Greenwich, Chatham Maritime, United Kingdom
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15
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Maqbool SN, Nazeer HS, Rafiq M, Javed A, Hanif R. Bridging the gap by discerning SNPs in linkage disequilibrium and their role in breast cancer. Gene 2018; 679:44-56. [PMID: 30118891 DOI: 10.1016/j.gene.2018.06.102] [Citation(s) in RCA: 2] [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: 04/26/2018] [Revised: 06/21/2018] [Accepted: 06/28/2018] [Indexed: 12/22/2022]
Abstract
Breast Cancer is the most common cancer among women with several genes involved in disease susceptibility. As majority of genome-wide significant variants fall outside the coding region, it is likely that some of them alter specific gene functions. GWAS database was used to interpret the regulatory functions of these genetic variants. A total of 320 SNPs for breast cancer were selected via GWAS, which were entered into the SNAP web portal tool, to determine the one's found to be in Linkage Disequilibrium (r2 < 0.80). The resulting 2024 proxy SNP's were processed in RegulomeDB to predict their regulatory role. Of these, 1440 produced a score ranging from 1-6, whereas the remaining produced no data. Only the variants under score 4 (cut-off value) in RegulomeDB has been studied further. From these variants, 221 had scores of less than 4, indicating a high degree of potential regulatory role associated with them. Further study revealed that 61 of the 221 SNPs were reported to be genome-wide significant for breast cancer, 52 to be associated with other diseases, 99 as unconfirmed for association with breast cancer, leaving only 9 to be novel proxy SNPs linked to breast cancer. Therefore, the study further confirmed postulation of non-coding variants being linked to disease risk thereby, requiring additional validation through genome-wide association studies to substantiate their underlying mechanism.
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Affiliation(s)
- Sundus Naila Maqbool
- Department of Healthcare Biotechnology, Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), Sector: H-12, Islamabad 44000, Pakistan
| | - Haleema Saadiya Nazeer
- Department of Healthcare Biotechnology, Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), Sector: H-12, Islamabad 44000, Pakistan
| | - Mehak Rafiq
- Research Center for Modeling & Simulation (RCMS), National University of Sciences and Technology, Islamabad, Pakistan
| | - Aneela Javed
- Harvard Medical School, 65 Landsdowne's Street, Cambridge, MA 02139, United States
| | - Rumeza Hanif
- Department of Healthcare Biotechnology, Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), Sector: H-12, Islamabad 44000, Pakistan.
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Fatima U, Ali M, Ahmed N, Rafiq M. Numerical modeling of susceptible latent breaking-out quarantine computer virus epidemic dynamics. Heliyon 2018; 4:e00631. [PMID: 29872764 PMCID: PMC5986544 DOI: 10.1016/j.heliyon.2018.e00631] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [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: 01/15/2018] [Revised: 04/24/2018] [Accepted: 05/15/2018] [Indexed: 11/28/2022] Open
Abstract
This work is concerned with the numerical modeling of susceptible-latent-breakingout-quarantine-susceptible (SLBQRS) computer virus dynamics. The SLBQRS epidemic system is solved with three finite difference methods, one is proposed nonstandard finite difference (NSFD) method and the other two are well known forward Euler finite difference (FD) method and Runge-Kutta finite difference method of order 4 (RK-4). The proposed NSFD method preserves all the essential conditions of the continuous system while RK-4 method and forward Euler method fail to preserve some of its essential conditions like positivity, convergence to the true steady states of the continuous system. The convergence analysis of the proposed NSFD method is also performed. Bifurcation value of infection coefficient for the system is also find out.
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Affiliation(s)
- Umbreen Fatima
- Department of Computer Science, University of Lahore, Lahore, Pakistan
| | - Mubasher Ali
- Department of Electrical Engineering, University of Lahore, Lahore, Pakistan
| | - Nauman Ahmed
- Department of Mathematics, University of Lahore, Lahore, Pakistan
| | - M Rafiq
- Faculty of Engineering, University of Central Punjab, Lahore, Pakistan
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Sajjad W, Qadir S, Ahmad M, Rafiq M, Hasan F, Tehan R, McPhail KL, Shah AA. Ectoine: a compatible solute in radio-halophilic Stenotrophomonas sp. WMA-LM19 strain to prevent ultraviolet-induced protein damage. J Appl Microbiol 2018; 125:457-467. [PMID: 29729069 DOI: 10.1111/jam.13903] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [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: 08/28/2017] [Revised: 02/03/2018] [Accepted: 04/15/2018] [Indexed: 11/26/2022]
Abstract
AIM Thiss study was conducted to investigate the possible role of a compatible solute from radio-halophilic bacterium against desiccation and ultra-violet radiation-induced oxidative stress. METHODS AND RESULTS Nine different radio-resistant bacteria were isolated from desert soil, where strain WMA-LM19 was chosen for detailed studies on the basis of its high tolerance to ultraviolet radiation among all these isolates. Here, 16S rRNA gene sequencing indicated the bacterium was closely related to Stenotrophomonas sp. (KT008383). A bacterial milking strategy was applied for extraction of intracellular compatible solutes in 70% (v/v) ethanol, which were purified by High Performance Liquid Chromatography (HPLC). The compound was characterized as ectoine by 1 H and 13 C Nuclear Magnetic Resonance (NMR), and Mass Spectrometry (MS). Ectoine inhibited oxidative damage to proteins and lipids in comparison to the standard ascorbic acid. It also demonstrated more efficient prevention (54·80%) against lysis to erythrocytes membrane by surface active agents than lecithin. Furthermore, a high level of ectoine-mediated protection of bovine serum albumin against ionizing radiation (1 500-2 000Jm-2 ) was observed, as indicated by sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) analysis. CONCLUSION The results indicated that ectoine from Stenotrophomonas sp. WMA-LM19 can be used as a potential mitigator and radio-protective agent to overcome radiation- and salinity-mediated oxidative damages in extreme environment. SIGNIFICANCE AND IMPACT OF THE STUDY Due to its anti-oxidant properties, ectoine from a radio-halophilic bacterium might be used in sunscreen formulation for protection against UV-induced oxidative stress.
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Affiliation(s)
- W Sajjad
- Department of Microbiology, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan.,Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR, USA.,Department of Multidisciplinary Studies, National University of Medical Sciences, Rawalpindi, 46000, Pakistan
| | - S Qadir
- Department of Microbiology, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - M Ahmad
- Department of Microbiology, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - M Rafiq
- Department of Microbiology, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan.,Department of Microbiology, Abdul Wali Khan University, Mardan, Pakistan
| | - F Hasan
- Department of Microbiology, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - R Tehan
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR, USA
| | - K L McPhail
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR, USA
| | - A A Shah
- Department of Microbiology, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
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Schibilsky D, Rafiq M, Kenny L, Lewis C, Burt C, Dunning J, Sudarshan C, Hasan A, Crossland D, Coats L, Tsui S, Parameshwar J, Berman M. Thoracic Organ Transplantation in Patients With Congenitally Corrected Transposition of the Great Arteries. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.1124] [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: 10/17/2022] Open
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Lahsini A, Bentama J, Addaou A, Rafiq M. Caractérisation physico-chimique et étude du frittage d'une argile destinée à l'élaboration de membranes de filtration tangentielle. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp:1998227] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Loukili M, Rafiq M, Durand J, Cot L. Structure cristalline de LaH(PO3H)2 3H2O. Comparaison avec les autres phosphites acides. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1991881975] [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: 11/15/2022]
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Hayat T, Nawaz S, Alsaedi A, Rafiq M. Impact of second-order velocity and thermal slips in the mixed convective peristalsis with carbon nanotubes and porous medium. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.05.072] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
OBJECTIVE This article compares the study design and statistical methods used in 2005, 2010 and 2015 of Pakistan Journal of Medical Sciences (PJMS). METHODS Only original articles of PJMS were considered for the analysis. The articles were carefully reviewed for statistical methods and designs, and then recorded accordingly. The frequency of each statistical method and research design was estimated and compared with previous years. RESULTS A total of 429 articles were evaluated (n=74 in 2005, n=179 in 2010, n=176 in 2015) in which 171 (40%) were cross-sectional and 116 (27%) were prospective study designs. A verity of statistical methods were found in the analysis. The most frequent methods include: descriptive statistics (n=315, 73.4%), chi-square/Fisher's exact tests (n=205, 47.8%) and student t-test (n=186, 43.4%). There was a significant increase in the use of statistical methods over time period: t-test, chi-square/Fisher's exact test, logistic regression, epidemiological statistics, and non-parametric tests. CONCLUSION This study shows that a diverse variety of statistical methods have been used in the research articles of PJMS and frequency improved from 2005 to 2015. However, descriptive statistics was the most frequent method of statistical analysis in the published articles while cross-sectional study design was common study design.
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Affiliation(s)
- Sohail Akhtar
- Dr. Sohail Akhtar, PhD (UK), Department of Statistics, University of Malakand, Lower Dir, KPK, Pakistan
| | - Syed Wadood Ali Shah
- Syed Wadood Ali Shah (PhD Candidate), Department of Pharmacy, University of Malakand, Lower Dir, KPK, Pakistan
| | - M Rafiq
- M. Rafiq (M.Phil), Department of Statistics, University of Malakand, Lower Dir, KPK, Pakistan
| | - Ajmal Khan
- Ajmal Khan, Department of Zoology, University of Malakand, Lower Dir, KPK, Pakistan
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Kawoosa AA, Wani IH, Basit S, Dar FA, Mumtaz EU, Rafiq M. Reconstruction of Unstable Hips with Ilizarov Technique. Role of Pelvic Support and Distal Lengthening Realignment Osteotomy. Ortop Traumatol Rehabil 2016; 17:481-7. [PMID: 26751748 DOI: 10.5604/15093492.1186823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Hips can suffer severe damage due to untreated developmental dysplasia, septic arthritis, tuberculosis, a neglected fracture of the neck of femur and neglected hip dislocation. The Ilizarov technique offers an effective treatment by providing a stable hip with abolished Trendelenburg lurch and equalizing limb length discrepancy through distal lengthening realignment osteotomy. MATERIAL AND METHODS 20 patients with hip instabilities due to various etiologies were treated with the Ilizarov technique of pelvic support osteotomy and distal lengthening realignment osteotomy. There were 12 females and 8 males in the study group and the age range was 13 to 30 years. Average limb length discrepancy was 5.95 cms (range 4-8.5 cms).The pre-operative and post-operative range of motion and Harris hip score was collected and data analyzed by Student's paired t test. A p value of < 0.05 was taken to be statistically significant Results. The functional Harris hip score improved in all the patients at final follow-up. The mean Harris hip score was 56.95 (range 33-71) pre-operatively, which improved to 83.25 (range 73-85) at final follow up and was statistically significant (P-value < 0.05). The mean length achieved was 5.53 cms (4-8 cms). The mean external fixation time was 8.6 months and the mean healing index was 1.54 months /cm. CONCLUSIONS 1. Ilizarov hip reconstruction is an excellent method of salvage in patients with unstable hips diverse etiologies especially in this part of the world, where patients demand unrestricted range of motion at hip, and in the younger age group, where other procedures do not offer a long term solution. 2. It provides an excellent functional outcome in hips of different etiologies. 3. However, for an excellent outcome, surgical expertise, patient compliance and meticulous follow-up are mandatory.
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Affiliation(s)
| | - Iftikhar H Wani
- Hospital for Bone and Joint Surgery Barzulla Srinagar, GMC Srinagar
| | | | - Fiaz A Dar
- Hospital for Bone and Joint Surgery Barzulla Srinagar, GMC Srinagar
| | - E Umer Mumtaz
- Hospital for Bone and Joint Surgery Barzulla Srinagar, GMC Srinagar
| | - M Rafiq
- Hospital for Bone and Joint Surgery Barzulla Srinagar, GMC Srinagar
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Abstract
Sanjad-Sakati syndrome is an autosomal recessive genetic disorder first described in Saudi Arabia. Anesthetic management of these patients is challenging due to airway difficulties, electrolyte imbalance, growth and mental retardation, and seizures. The anesthetic management of the syndrome is described in this case report.
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Affiliation(s)
- A N Alshoaiby
- Department of Anesthesiology and Pain Medicine, King Fahd Medical City, Riyadh, Kingdom of Saudi Arabia
| | - M Rafiq
- Department of Anesthesiology and Pain Medicine, King Fahd Medical City, Riyadh, Kingdom of Saudi Arabia
| | - R Jan
- Department of Anesthesiology and Pain Medicine, King Fahd Medical City, Riyadh, Kingdom of Saudi Arabia
| | - M Shahbaz
- Department of Anesthesiology and Pain Medicine, King Fahd Medical City, Riyadh, Kingdom of Saudi Arabia
| | - A Faqeeh
- Department of Anesthesiology and Pain Medicine, King Fahd Medical City, Riyadh, Kingdom of Saudi Arabia
| | - M A Alsohaibani
- Department of Anesthesiology and Pain Medicine, King Fahd Medical City, Riyadh, Kingdom of Saudi Arabia
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Ishaq U, Akram M, Iqbal Z, Rafiq M, Akrem A, Nadeem M, Shafi F, Shafiq Z, Mahmood S, Baig M. Production and characterization of novel self-assembling biosurfactants from Aspergillus flavus. J Appl Microbiol 2015; 119:1035-45. [DOI: 10.1111/jam.12929] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 06/18/2015] [Accepted: 07/03/2015] [Indexed: 12/19/2022]
Affiliation(s)
- U. Ishaq
- Institute of Pure and Applied Biology; Bahauddin Zakariya University; Multan Pakistan
| | - M.S. Akram
- Institute of Pure and Applied Biology; Bahauddin Zakariya University; Multan Pakistan
| | - Z. Iqbal
- Applied Chemistry Research Centre; PCSIR Labs Complex; Lahore Pakistan
| | - M. Rafiq
- Institute of Pure and Applied Biology; Bahauddin Zakariya University; Multan Pakistan
| | - A. Akrem
- Institute of Pure and Applied Biology; Bahauddin Zakariya University; Multan Pakistan
| | - M. Nadeem
- University College of Agriculture; Bahauddin Zakariya University; Multan Pakistan
| | - F. Shafi
- Institute of Pure and Applied Biology; Bahauddin Zakariya University; Multan Pakistan
| | - Z. Shafiq
- Institute of Chemical Sciences; Bahauddin Zakariya University; Multan Pakistan
| | - S. Mahmood
- Institute of Pure and Applied Biology; Bahauddin Zakariya University; Multan Pakistan
| | - M.A. Baig
- Institute of Pure and Applied Biology; Bahauddin Zakariya University; Multan Pakistan
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Rafiq M, Ali S, Shahzadi S, Shahid M, Sharma SK, Qanungo K. Synthesis, characterization, and biological activities of homo- and heterobimetallic complexes of Sn(IV) and Pd(II) with 2-mercapto-5-methyl benzimidazole. J IRAN CHEM SOC 2013. [DOI: 10.1007/s13738-013-0287-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Morrison KE, Dhariwal S, Hornabrook R, Savage L, Burn DJ, Khoo TK, Kelly J, Murphy CL, Al-Chalabi A, Dougherty A, Leigh PN, Wijesekera L, Thornhill M, Ellis CM, O'Hanlon K, Panicker J, Pate L, Ray P, Wyatt L, Young CA, Copeland L, Ealing J, Hamdalla H, Leroi I, Murphy C, O'Keeffe F, Oughton E, Partington L, Paterson P, Rog D, Sathish A, Sexton D, Smith J, Vanek H, Dodds S, Williams TL, Steen IN, Clarke J, Eziefula C, Howard R, Orrell R, Sidle K, Sylvester R, Barrett W, Merritt C, Talbot K, Turner MR, Whatley C, Williams C, Williams J, Cosby C, Hanemann CO, Iman I, Philips C, Timings L, Crawford SE, Hewamadduma C, Hibberd R, Hollinger H, McDermott C, Mils G, Rafiq M, Shaw PJ, Taylor A, Waines E, Walsh T, Addison-Jones R, Birt J, Hare M, Majid T. Lithium in patients with amyotrophic lateral sclerosis (LiCALS): a phase 3 multicentre, randomised, double-blind, placebo-controlled trial. Lancet Neurol 2013; 12:339-45. [PMID: 23453347 PMCID: PMC3610091 DOI: 10.1016/s1474-4422(13)70037-1] [Citation(s) in RCA: 100] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Background Lithium has neuroprotective effects in cell and animal models of amyotrophic lateral sclerosis (ALS), and a small pilot study in patients with ALS showed a significant effect of lithium on survival. We aimed to assess whether lithium improves survival in patients with ALS. Methods The lithium carbonate in amyotrophic lateral sclerosis (LiCALS) trial is a randomised, double-blind, placebo-controlled trial of oral lithium taken daily for 18 months in patients with ALS. Patients aged at least 18 years who had ALS according to the revised El Escorial criteria, had disease duration between 6 and 36 months, and were taking riluzole were recruited from ten centres in the UK. Patients were randomly assigned (1:1) to receive either lithium or matched placebo tablets. Randomisation was via an online system done at the level of the individual by block randomisation with randomly varying block sizes, stratified by study centre and site of disease onset (limb or bulbar). All patients and assessing study personnel were masked to treatment assignment. The primary endpoint was the rate of survival at 18 months and was analysed by intention to treat. This study is registered with Eudract, number 2008-006891-31. Findings Between May 26, 2009, and Nov 10, 2011, 243 patients were screened, 214 of whom were randomly assigned to receive lithium (107 patients) or placebo (107 patients). Two patients discontinued treatment and one died before the target therapeutic lithium concentration could be achieved. 63 (59%) of 107 patients in the placebo group and 54 (50%) of 107 patients in the lithium group were alive at 18 months. The survival functions did not differ significantly between groups (Mantel-Cox log-rank χ2 on 1 df=1·64; p=0·20). After adjusting for study centre and site of onset using logistic regression, the relative odds of survival at 18 months (lithium vs placebo) was 0·71 (95% CI 0·40–1·24). 56 patients in the placebo group and 61 in the lithium group had at least one serious adverse event. Interpretation We found no evidence of benefit of lithium on survival in patients with ALS, but nor were there safety concerns, which had been identified in previous studies with less conventional designs. This finding emphasises the importance of pursuing adequately powered trials with clear endpoints when testing new treatments. Funding The Motor Neurone Disease Association of Great Britain and Northern Ireland.
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Iqbal A, Blackburn D, Rafiq M, Sharrack B. MULTIPLE CRANIAL NERVE PALSIES IN A YOUNG SINGER. J Neurol Psychiatry 2012. [DOI: 10.1136/jnnp-2012-304200a.66] [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: 11/04/2022]
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Rafiq M, Proctor AR, McDermott CJ, Shaw P. CLINICAL EVALUATION OF TRANSCUTANEOUS CARBON DIOXIDE MONITOR (TOSCA) IN PATIENTS WITH MOTOR NEURONE DISEASE. J Neurol Psychiatry 2012. [DOI: 10.1136/jnnp-2012-304200a.119] [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: 11/04/2022]
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Dercon G, Mabit L, Hancock G, Nguyen ML, Dornhofer P, Bacchi OOS, Benmansour M, Bernard C, Froehlich W, Golosov VN, Haciyakupoglu S, Hai PS, Klik A, Li Y, Lobb DA, Onda Y, Popa N, Rafiq M, Ritchie JC, Schuller P, Shakhashiro A, Wallbrink P, Walling DE, Zapata F, Zhang X. Fallout radionuclide-based techniques for assessing the impact of soil conservation measures on erosion control and soil quality: an overview of the main lessons learnt under an FAO/IAEA Coordinated Research Project. J Environ Radioact 2012; 107:78-85. [PMID: 22336567 DOI: 10.1016/j.jenvrad.2012.01.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2011] [Revised: 01/09/2012] [Accepted: 01/16/2012] [Indexed: 05/31/2023]
Abstract
This paper summarizes key findings and identifies the main lessons learnt from a 5-year (2002-2008) coordinated research project (CRP) on "Assessing the effectiveness of soil conservation measures for sustainable watershed management and crop production using fallout radionuclides" (D1.50.08), organized and funded by the International Atomic Energy Agency through the Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture. The project brought together nineteen participants, from Australia, Austria, Brazil, Canada, Chile, China, Japan, Morocco, Pakistan, Poland, Romania, Russian Federation, Turkey, United Kingdom, United States of America and Vietnam, involved in the use of nuclear techniques and, more particularly, fallout radionuclides (FRN) to assess the relative impacts of different soil conservation measures on soil erosion and land productivity. The overall objective of the CRP was to develop improved land use and management strategies for sustainable watershed management through effective soil erosion control practices, by the use of ¹³⁷Cs (half-life of 30.2 years), ²¹⁰Pb(ex) (half-life of 22.3 years) and ⁷Be (half-life of 53.4 days) for measuring soil erosion over several spatial and temporal scales. The environmental conditions under which the different research teams applied the tools based on the use of fallout radionuclides varied considerably--a variety of climates, soils, topographies and land uses. Nevertheless, the achievements of the CRP, as reflected in this overview paper, demonstrate that fallout radionuclide-based techniques are powerful tools to assess soil erosion/deposition at several spatial and temporal scales in a wide range of environments, and offer potential to monitor soil quality. The success of the CRP has stimulated an interest in many IAEA Member States in the use of these methodologies to identify factors and practices that can enhance sustainable agriculture and minimize land degradation.
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Affiliation(s)
- G Dercon
- Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency, IAEA, Department of Nuclear Sciences and Applications, Wagramerstrasse 5, A-1400 Vienna, Austria.
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Affiliation(s)
- M Rafiq
- Department of Neurology, Royal Hallamshire Hospital, Sheffield, UK
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Affiliation(s)
- M Rafiq
- Department of Neurology, Royal Hallamshire Hospital, Sheffield, UK
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Affiliation(s)
- H. S. Jaafar
- a MARA University of Technology, Malaysia, and The Business School , Loughborough University , Loughborough, Leicestershire, LE11 3TU, UK
| | - M. Rafiq
- b The Business School , Loughborough University , Loughborough, Leicestershire, LE11 3TU, UK
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Alami Younssi S, Iraqi A, Rafiq M, Persin M, Larbot A, Sarrazin J. γ Alumina membranes grafting by organosilanes and its application to the separation of solvent mixtures by pervaporation. Sep Purif Technol 2003. [DOI: 10.1016/s1383-5866(03)00031-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [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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Ahmed A, Hafiz S, Rafiq M, Tariq N, Abdulla EM, Hussain S, Azim R, Siddiqui SJ, Awan A, Khan KZ, Fareed A. Determination of antimicrobial activity of Cefaclor on common respiratory tract pathogens in Pakistan. J PAK MED ASSOC 2002; 52:7-11. [PMID: 11963587] [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] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
OBJECTIVE To determine the antimicrobial activity of Cefaclor against common respiratory tract pathogens isolated from patients in Pakistan. SETTING Department of Microbiology, Liaquat National Postgraduate Medical Centre, Karachi. METHOD A laboratory analysis was done on 466 isolates of respiratory tract pathogens collected from 13 laboratories from all over Pakistan. Antibiotic sensitivity test was done by Kirby Bauer disc diffusion method and MIC of Cefaclor was determined by 'E' test. RESULT Of the 163 Streptococcus pneumoniae, 87 Moraxella catarrhalis and 216 Haemophilus influenzae > 95% isolates were susceptible to Cefaclor. The MIC 90 of all these pathogens were < 2 ug. CONCLUSION Resistance of respiratory tract pathogens to the 2nd generation Cephalosporin, Cefaclor is very low. MIC 90 of Cefaclor against all three common respiratory tract pathogens is < 2 ug, which indicates that Cefaclor would be effective in more than 90% of cases infected with these bacteria.
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Affiliation(s)
- A Ahmed
- Liaquat National Hospital, Karachi
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Lakshmana M, Rafiq M, Sridhar BY. Evaluation of E-721B, an indigenous herbal combination in experimental models of immediate hypersensitivity. Indian J Physiol Pharmacol 2001; 45:319-28. [PMID: 11881571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
E-721B, an indigenous herbal combination was investigated for its usefulness in immediate hypersensitivity using different animal models. The drug inhibited the mast cell degranulation induced both by antigen and compound 48/80, the Schultz-Dale response in sensitized guinea pig ileum smooth muscle preparation and the production of precipitating antibodies in 50% of tested rats. It also inhibited the mast cell degranulation in passively sensitized rats indicating its suppressive action on production of reaginic antibody (IgE). However, the drug did not inhibit the 48 hours passive cutaneous anaphylaxis reaction in rats, indicating that a single dose of the drug does not have cromoglycate like properties. All the above results indicate the inhibitory effect of E-721B on immediate hypersensitive reactions such as asthma.
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Affiliation(s)
- M Lakshmana
- Department of Pharmacology, Government College of Pharmacy, P. Kalinga Rao Road, Bangalore-560 027
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Mitra SK, Venkataranganna MV, Udupa UV, Gopumadhavan S, Seshadri SJ, Rafiq M, Anturlikar SD, Sundaram R, Tripathi M. The beneficial effect of OST-6 (OsteoCare), a herbomineral formulation, in experimental osteoporosis. Phytomedicine 2001; 8:195-201. [PMID: 11417912 DOI: 10.1078/0944-7113-00034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
OST-6 (OsteoCare), a herbomineral formulation, was evaluated for its inhibitory effect on the progress of bone loss induced by ovariectomy in rats. Ovariectomized (Ovx) rats were administered with OST-6 at 250 and 500 mg/kg b.wt., orally daily for 90 days. On 91st day, ovariectomized rats showed reduced bone mineral content and increased serum alkaline phosphatase levels, excretion of urinary calcium and pyridinium cross-links levels. Histologically, bone sections revealed narrowed and disappearance of trabeculae and widened medullary spaces. The total numbers of Tartrate-resistant acid phosphatase (TRAP) positive cells were significantly increased both in-vivo and in-vitro methods. OST-6, at a dose of 500 mg/kg, significantly improved bone mineral contents, serum alkaline phosphatase levels, reduced the elevated urinary calcium and pyridinium cross-links excretion, number of TRAP positive cells and reversal of the above mentioned histological features. These results indicate the usefulness of OST-6 in the management of osteoporosis in a natural way through herbal resources.
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Affiliation(s)
- S K Mitra
- Department of Pharmacology, R&D Center, The Himalaya Drug Company, Makali, Bangalore, India.
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Rafiq M, Worthington T, Tebbs SE, Treacy RBC, Dias R, Lambert PA, Elliott TSJ. Serological detection of Gram-positive bacterial infection around prostheses. ACTA ACUST UNITED AC 2000. [DOI: 10.1302/0301-620x.82b8.0821156] [Citation(s) in RCA: 8] [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] [Indexed: 11/05/2022]
Abstract
Coagulase-negative staphylococci produce an exocellular glycolipid antigen which has potential as a serological marker of infection in bone. The value of this newly detected antigen was investigated by enzyme-linked immunosorbent assay (ELISA) in 15 patients with culture-proven infection of prostheses caused by Gram-positive bacteria. The antigen was purified by gel-permeation chromatography from the culture supernatants of coagulase-negative staphylococci grown in a chemically defined medium. There were significant differences (p < 0.0001) between the serum IgG and IgM levels in patients with infection due to Gram-positive staphylococci and those of a control group of 32 patients with no infection. The ELISA test, which has potential for the diagnosis of infection, may be valuable in distinguishing between staphylococcal infection around prostheses and aseptic loosening.
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Affiliation(s)
- M. Rafiq
- Royal Orthopaedic Hospital, Bristol Road South, Northfield, Birmingham B31 2AP, UK
| | - T. Worthington
- Department of Clinical Microbiology, University Hospital, Edgbaston, Birmingham B15 2TM, UK
| | - S. E. Tebbs
- Department of Clinical Microbiology, University Hospital, Edgbaston, Birmingham B15 2TM, UK
| | - R. B. C. Treacy
- Royal Orthopaedic Hospital, Bristol Road South, Northfield, Birmingham B31 2AP, UK
| | - R. Dias
- Royal Orthopaedic Hospital, Bristol Road South, Northfield, Birmingham B31 2AP, UK
| | - P. A. Lambert
- Microbiology Research Group, Pharmaceutical Sciences Institute, Aston University, Birmingham B4 7ET, UK
| | - T. S. J. Elliott
- Department of Clinical Microbiology, University Hospital, Edgbaston, Birmingham B15 2TM, UK
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Rafiq M, Worthington T, Tebbs SE, Treacy RB, Dias R, Lambert PA, Elliott TS. Serological detection of Gram-positive bacterial infection around prostheses. J Bone Joint Surg Br 2000; 82:1156-61. [PMID: 11132278 DOI: 10.1302/0301-620x.82b8.10366] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Coagulase-negative staphylococci produce an exocellular glycolipid antigen which has potential as a serological marker of infection in bone. The value of this newly detected antigen was investigated by enzyme-linked immunosorbent assay (ELISA) in 15 patients with culture-proven infection of prostheses caused by Gram-positive bacteria. The antigen was purified by gel-permeation chromatography from the culture supernatants of coagulase-negative staphylococci grown in a chemically defined medium. There were significant differences (p < 0.0001) between the serum IgG and IgM levels in patients with infection due to Gram-positive staphylococci and those of a control group of 32 patients with no infection. The ELISA test, which has potential for the diagnosis of infection, may be valuable in distinguishing between staphylococcal infection around prostheses and aseptic loosening.
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Affiliation(s)
- M Rafiq
- Royal Orthopaedic Hospital, Birmingham, England, UK
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Tripathi M, Sundaram R, Rafiq M, Venkataranganna MV, Gopumadhavan S, Mitra SK. Pharmacokinetic interactions of Mentat with carbamazepine and phenytoin. Eur J Drug Metab Pharmacokinet 2000; 25:223-6. [PMID: 11420894 DOI: 10.1007/bf03192318] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
In the present study, Mentat, a herbomineral psychotropic preparation, was studied for its pharmacokinetic interaction with the commonly used anti-epileptic drugs, carbamazepine and phenytoin. The interaction of carbamazepine and phenytoin with Mentat was studied in rabbits. Thirty two rabbits were divided into four groups of eight each. Animals of Group I were treated with carbamazepine (50 mg/kg b.wt. p.o.), Group II were treated with carbamazepine (50 mg/kg b.wt. p.o.) + Mentat (500 mg/kg b.wt. p.o.), Group III were treated with phenytoin (50 mg/kg b.wt. p.o.) and Group IV were treated with phenytoin (50 mg/kg b.wt. p.o.) + Mentat (500 mg/kg b.wt. p.o.) for a period of 8 days. On day 0 and day 8, plasma carbamazepine and phenytoin levels were estimated at different time intervals. A simultaneous treatment with Mentat resulted in a significant increase in plasma AUC of carbamazepine as well as phenytoin as compared to carbamazepine or phenytoin alone. Cmax and Tmax of carbamazepine and phenytoin also were evaluated. The results suggest that co-administration of Mentat could improve the effectiveness of anti-epileptic drugs due to the increased bioavailability of the latter. However, this has to be done with critical medical supervision to avoid any toxic reactions and preferably with therapeutic drug monitoring (TDM) which could also help in dose optimization.
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Affiliation(s)
- M Tripathi
- Research and Technical Services, R&D Center, Himalaya Drug Company, Makali, Bangalore-562 123, India
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Rasool E, Khan MF, Nawaz M, Rafiq M. Utilization of sunflower crop residues as feed in small ruminants. Asian Australas J Anim Sci 1998. [DOI: 10.5713/ajas.1998.272] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Jenhi M, El Ghadraoui E, Bali H, El Aatmani M, Rafiq M. Reaction mechanism in the formation of perovskite Pb(Fe1/2Nb1/2)O3 by calcining of mixed oxides (CMO). ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s0992-4361(98)80003-9] [Citation(s) in RCA: 6] [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: 10/18/2022]
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Abrabri M, Larbot A, Persin M, Sarrazin J, Rafiq M, Cot L. Potassium titanyl phosphate membranes: surface properties and application to ionic solution filtration. J Memb Sci 1998. [DOI: 10.1016/s0376-7388(97)00259-7] [Citation(s) in RCA: 14] [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: 11/24/2022]
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Rafiq M, Suen CK, Choudhury N, Joannou CL, White KN, Evans RW. Expression of recombinant human ceruloplasmin--an absolute requirement for splicing signals in the expression cassette. FEBS Lett 1997; 407:132-6. [PMID: 9166886 DOI: 10.1016/s0014-5793(97)00325-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We report the successful expression of recombinant human ceruloplasmin which was made possible by inclusion of splicing signals in the expression vector. Ceruloplasmin cDNA expressed from the vector pNUT in baby hamster kidney cells gave protein yields of 0.03 mg/l which increased to 15 mg/l with splicing signals present. The defect in expression from the intronless cDNA is due to complete retention of ceruloplasmin mRNA in cell nuclei. The block to cytoplasmic export is alleviated by splicing signals, allowing full expression of the mRNA.
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Affiliation(s)
- M Rafiq
- Division of Biochemistry and Molecular Biology, United Medical and Dental Schools of Guy's Hospital, London, UK
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Rafiq M, Jadoon JK, Mahmood K, Naqvi MA. Economic benefits of supplementing lambs with urea molasses blocks on ranges of Pakistan. Asian Australas J Anim Sci 1996. [DOI: 10.5713/ajas.1996.127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Feast S, Bethell D, Bulman Page PC, Rafiq M, Siddiqui H, Willock DJ, Hutchings GJ, King F, Rochester CH. Heterogeneous enantioselective dehydration of butan-2-ol. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/s0167-2991(96)80231-x] [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: 03/13/2023]
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Durmaz R, Durmaz B, Tas I, Rafiq M. Seropositivity of toxoplasmosis among reproductive-age women in Malatya, Turkey. J Egypt Soc Parasitol 1995; 25:693-8. [PMID: 8586864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A total of 996 sera from women between the ages of 17-45 years were examined for Toxoplasma gondii; IgG and IgM antibodies by solid-phase-enzyme immunoassay. The overall prevalence of toxoplasmosis was found to be 39.9%. Of 996 women, 396 (39.6%) had specific IgG, 26 (2.6%) had both IgG and IgM, and 3 (0.3%) had only IgM antibodies. The results obtained in this study & other previous studies done in Turkey indicated the high prevalence of T. gondii infection in this country.
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Affiliation(s)
- R Durmaz
- Department of Clinical Microbiology, Faculty of Medicine, Inonu University, Malatya, Turkey
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Abstract
Mutations of kinetically active residues in the recombinant N-lobe of human transferrin may accelerate or retard release of iron from the protein to pyrophosphate, thereby providing means for exploring the individual roles of such residues in the concerted mechanisms of release. Using an established spectrofluorometric method and pyrophosphate as the required iron-sequestering agent, we have compared release from unaltered native transferrin and recombinant N-lobe half-transferrin to release from six N-lobe mutants, R124S, R124K, K206R, H207E, H249Y, and Y95H. Mutation of R124, which serves as a principal anchor for the synergistic carbonate anion ordinarily required for iron binding by transferrin, accelerates release. This effect is most marked at endosomal pH, 5.6, and is also evident at extracellular pH, 7.4, pointing to a critical and perhaps initiating role of carbonate in the release process. Mutation of K206 to arginine, or of H207 to glutamine, each lying in the interdomain cleft of the N-lobe, gives products mimicking the arrangements in lactoferrin. Release of iron from these two mutants, as from lactoferrin, is substantially slower than from unaltered recombinant N-lobe. Interdomain residues not directly involved in iron or anion binding may therefore participate in the control of iron release within the endosome. The H249Y mutant releases iron much more rapidly than its wild-type parent or any other mutant, possibly because of steric effects of the additional phenolic ring in the binding site. No simple explanation is available to account for a stabilizing effect of the Y95H mutation.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- O Zak
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, New York 10461, USA
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