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Altaf S, Alkheraije KA. Cell membrane-coated nanoparticles: An emerging antibacterial platform for pathogens of food animals. Front Vet Sci 2023; 10:1148964. [PMID: 36950535 PMCID: PMC10025400 DOI: 10.3389/fvets.2023.1148964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 02/14/2023] [Indexed: 03/08/2023] Open
Abstract
Bacterial pathogens of animals impact food production and human health globally. Food animals act as the major host reservoirs for pathogenic bacteria and thus are highly prone to suffer from several endemic infections such as pneumonia, sepsis, mastitis, and diarrhea, imposing a major health and economical loss. Moreover, the consumption of food products of infected animals is the main route by which human beings are exposed to zoonotic bacteria. Thus, there is excessive and undue administration of antibiotics to fight these virulent causative agents of food-borne illness, leading to emergence of resistant strains. Thus, highprevalence antibiotic-resistant resistant food-borne bacterial infections motivated the researchers to discover new alternative therapeutic strategies to eradicate resistant bacterial strains. One of the successful therapeutic approach for the treatment of animal infections, is the application of cell membrane-coated nanoparticles. Cell membranes of several different types of cells including platelets, red blood cells, neutrophils, cancer cells, and bacteria are being wrapped over the nanoparticles to prepare biocompatible nanoformulations. This diversity of cell membrane selection and together with the possibility of combining with an extensive range of nanoparticles, has opened a new opportunistic window for the development of more potentially effective, safe, and immune evading nanoformulations, as compared to conventionally used bare nanoparticle. This article will elaborately discuss the discovery and development of novel bioinspired cell membrane-coated nanoformulations against several pathogenic bacteria of food animals such as Klebsiella pneumoniae, Escherichia coli, Staphylococcus aureus, Salmonella enteritidis, Campylobacter jejuni, Helicobacter pylori, and Group A Streptococcus and Group B Streptococcus.
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Affiliation(s)
- Sidra Altaf
- Department of Pharmacy, University of Agriculture, Faisalabad, Pakistan
| | - Khalid Ali Alkheraije
- Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, Qassim University, Buraidah, Saudi Arabia
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Bilal A, Muhammad K, Riaz S, Altaf S. Demographic correlates of paternal postpartum depression in Pakistani males. J Sex Med 2022. [DOI: 10.1016/j.jsxm.2022.03.457] [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: 12/01/2022]
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Altaf S, Saleem F, Sher AA, Ali A. Potential therapeutic strategies to combat HCC. Curr Mol Pharmacol 2022; 15:929-942. [PMID: 34979895 DOI: 10.2174/1874467215666220103111009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 08/16/2021] [Accepted: 09/07/2021] [Indexed: 11/22/2022]
Abstract
Hepatocellular carcinoma (HCC) is a complex, life threatening and most common neoplasm in the world. HCC tumors are genetically and phenotypically heterogeneous and involve various molecular mechanisms and stimulation of several signaling pathways such as Vascular Endothelial Growth Factor, Epidermal Growth Factor Receptors (EGFR), Insulin growth factor, Ras/extracellular signal-stimulated kinase, mammalian goal of rapamycin (mTOR), c-mesenchymal-epithelial transition factor-1 (c-Met), Hedgehog, Wnt and apoptotic signaling. Lately, in patient's multi-kinase cascade blockers such as sorafenib, selumetinib and regorafenib have increased survival rate of progressive HCC. This development presents a step forward towards the therapy of liver cancer infection and attests that molecular systemic rehabilitations can be useful in HCC treatment. The development of these systemic therapeutic agents has further expanded the research area for surplus molecular mediators to auxiliary increase cure rate of patients. This article reviews the complete consideration of focus on cascades, current enduring clinical tests by means of HCC therapeutic mediators, and imminent prospects in the cure of HCC.
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Affiliation(s)
- Sidra Altaf
- Department of Pharmacy, University of Agriculture, Faisalabad, Pakistan
| | - Faiza Saleem
- Department of Pharmacy, University of Agriculture, Faisalabad, Pakistan
| | - Azam Ali Sher
- Department of Epidemiology, Michigan State University, Michigan, USA
| | - Ashiq Ali
- Department of Pathology, University of Agriculture, Faisalabad, Pakistan
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Altaf S, Muhammad F, Aslam B, Faisal MN. Cell membrane enveloped polymeric nanosponge for detoxification of chlorpyrifos poison: In vitro and in vivo studies. Hum Exp Toxicol 2021; 40:1286-1295. [PMID: 33583223 DOI: 10.1177/0960327121993207] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Organophosphates are highly toxic compounds as they are involved in irreversible inhibition of acetylcholinesterase, causing various neurotoxic effects via acetylcholine accumulation throughout the nervous system. Traditional treatments for organophosphate poisoning are not effective enough to overcome all the toxic effects. There is a need for alternate treatment of life threatening poisoning of organophosphates. For this purpose a biomimetic nanosponge of poly (lactic-co-glycolic acid) is prepared, characterized and analysed as an antidote for organophosphate poisoning. In this nanosponge red blood cell membranes are used for coating poly lactic co-glycolic acid nanoparticles. In vitro studies are conducted to investigate the retention of acetylcholinesterase activity on the prepared nanosponge as well as to assess the scavenging ability of prepared nanosponge for model organophosphate, chlorpyrifos. In vivo studies are conducted to evaluate the detoxification potential of nanosponge in rabbit model, poisoned with chlorpyrifos. Hepatotoxicity and renal toxicity of nanosponge/chlorpyrifos complex is also studied in survived rabbits and the data is analysed statistically.
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Affiliation(s)
- S Altaf
- Institute of Physiology and Pharmacology, 66724University of Agriculture, Faisalabad, Pakistan.,Department of Pharmacy, 66724University of Agriculture, Faisalabad, Pakistan
| | - F Muhammad
- Institute of Physiology and Pharmacology, 66724University of Agriculture, Faisalabad, Pakistan
| | - B Aslam
- Institute of Physiology and Pharmacology, 66724University of Agriculture, Faisalabad, Pakistan
| | - M N Faisal
- Institute of Physiology and Pharmacology, 66724University of Agriculture, Faisalabad, Pakistan
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Altaf S, Ijaz H, Haider J, Naz M, Aqeel M, Ul-Hamid A, Ikram M, Zulfiqar S, Ditta SA, Shahbaz A, Ikram M. Influence of various transition metals incorporated into tellurium used as antimicrobial agent and textile dye degrader. Appl Nanosci 2020. [DOI: 10.1007/s13204-020-01547-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Altaf S, Haider A, Naz S, Ul-Hamid A, Haider J, Imran M, Shahzadi A, Naz M, Ajaz H, Ikram M. Comparative Study of Selenides and Tellurides of Transition Metals (Nb and Ta) with Respect to its Catalytic, Antimicrobial, and Molecular Docking Performance. Nanoscale Res Lett 2020; 15:144. [PMID: 32643064 PMCID: PMC7343698 DOI: 10.1186/s11671-020-03375-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 06/23/2020] [Indexed: 05/13/2023]
Abstract
The present research is a comparative study that reports an economical and accessible method to synthesize niobium (Nb) and Tantalum (Ta) selenides and tellurides with useful application in the removal of pollutants in textile, paper, and dyeing industries as well as in medical field. In this study, solid-state process was used to generate nanocomposites and various characterization techniques were employed to compare two groups of materials under investigation. Structure, morphology, elemental constitution, and functional groups of synthesized materials were analyzed with XRD, FESEM coupled with EDS, FTIR, and Raman spectroscopy, respectively. HR-TEM images displayed nanoscale particles with tetragonal and monoclinic crystal structures. The optical properties were evaluated in terms of cut-off wavelength and optical band gap using UV-visible spectroscopy. A comparative behavior of both groups of compounds was assessed with regards to their catalytic and microcidal properties. Extracted nanocomposites when used as catalysts, though isomorphs of each other, showed markedly different behavior in catalytic degradation of MB dye in the presence of NaBH4 that was employed as a reducing agent. This peculiar deviation might be attributed to slight structural differences between them. Escherichia coli and Staphylococcus aureus (G -ve and + ve bacteria, respectively) were designated as model strains for in vitro antibacterial tests of both clusters by employing disk diffusion method. Superior antibacterial efficacy was observed for telluride system (significant inhibition zones of 26-35 mm) compared with selenide system (diameter of inhibition zone ranged from 0.8 mm to 1.9 mm). In addition, molecular docking study was undertaken to ascertain the binding interaction pattern between NPs and active sites in targeted cell protein. The findings were in agreement with antimicrobial test results suggesting NbTe4 to be the best inhibitor against FabH and FabI enzymes.
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Affiliation(s)
- S Altaf
- Department of Chemistry, University of Engineering and Technology, Lahore, 54000, Pakistan
| | - A Haider
- Department of Clinical Medicine and Surgery, University of Veterinary and Animal Sciences, Lahore, Punjab, 54000, Pakistan
| | - S Naz
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - A Ul-Hamid
- Center for Engineering Research, Research Institute, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
| | - J Haider
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - M Imran
- State key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Centre for Soft Matter Science and Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, 100029, China
| | - A Shahzadi
- University College of Pharmacy, University of the Punjab, Lahore, 54000, Pakistan
| | - M Naz
- Biochemistry Lab, Department of Chemistry, Government College University, Lahore, Punjab, 54000, Pakistan
| | - H Ajaz
- Department of Chemistry, University of Engineering and Technology, Lahore, 54000, Pakistan
| | - M Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University, Lahore, Punjab, 54000, Pakistan.
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Altaf S, Ajaz H, Imran M, Ul-Hamid A, Naz M, Aqeel M, Shahzadi A, Shahbaz A, Ikram M. Synthesis and characterization of binary selenides of transition metals to investigate its photocatalytic, antimicrobial and anticancer efficacy. Appl Nanosci 2020. [DOI: 10.1007/s13204-020-01350-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Suresh G, Arjunan R, Altaf S, Kumar V. Dilemma in primary hyperparathyroidism with multiple brown tumors. Formos J Surg 2020. [DOI: 10.4103/fjs.fjs_45_19] [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] Open
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Girish S, Arjunan R, Ramachandra C, Altaf S. Mean Platelet Volume (MPV) is it a new prognostic marker in resectable carcinoma stomach? Ann Oncol 2019. [DOI: 10.1093/annonc/mdz422.032] [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: 11/14/2022] Open
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Butt A, Jeeva I, Masud S, Fadoo Z, Altaf S, Mushtaq N. Orbital tumor board: life saver or time waster? Leuk Res 2019. [DOI: 10.1016/s0145-2126(19)30393-5] [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: 11/27/2022]
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Kaleem Z, Khan JA, Mushtaq Z, Altaf S, Javed I. Assessment of potential interaction between simvastatin and clarithromycin in healthy adult male subjects. Pak J Pharm Sci 2018; 31:801-806. [PMID: 29716858] [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: 06/08/2023]
Abstract
Cardiac patients with weak immune system are susceptible to bacterial infections. Their prescriptions frequently contain simvastatin and clarithromycin together. The objective of present project was to assess the potential interaction between simvastatin and clarithromycin by evaluating the clarithromycin effects on the pharmacokinetics of simvastatin in healthy adult male subjects. The study design comprised of two phases, used at interval of one week. In first phase simvastatin 20 mg alone was administered to each volunteer. In second phase, co-administration of simvastatin 20 mg with clarithromycin 250 mg was made under similar specified conditions. Blood samples were collected at specified time intervals. Simvastatin plasma concentrations were analyzed through High Performance Liquid Chromatography with UV detector at 238 nm wavelength. Using one compartment open model, MW/PHARM version 3.02 software program was used by F. Rombut for pharmacokinetic parameters calculation. Clarithromycin co-treatment resulted in 2.3 fold increase in maximum plasma concentration Cmax (from 2.47±0.34 ng.mL-1 to 5.66±1.18 ng.mL-1; p<0.05) and 3.9 fold increase in area under time versus concentration curve from 0 to 10 hours AUC0-10 (from 15.10±3.73 ng.hr.mL-1 to 58.49±15.73 ng.hr.mL-1; p<0.05) of simvastatin. These results suggest that co-prescription of simvastatin and clarithromycin should be avoided to minimize the adverse events resulting from high simvastatin concentration, without sacrificing therapeutic worth of simvastatin.
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Affiliation(s)
- Zainab Kaleem
- Institute of Pharmacy, Physiology and Pharmacology, University of Agriculture, Faisalabad, Pakistan
| | - Junaid Ali Khan
- Institute of Pharmacy, Physiology and Pharmacology, University of Agriculture, Faisalabad, Pakistan
| | - Zahid Mushtaq
- Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan
| | - Sidra Altaf
- Institute of Pharmacy, Physiology and Pharmacology, University of Agriculture, Faisalabad, Pakistan
| | - Ijaz Javed
- Institute of Pharmacy, Physiology and Pharmacology, University of Agriculture, Faisalabad, Pakistan
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Altaf S, Sakib S, Levy Y, Sadler M. Abstract No. 681 Predictability of D-dimer levels in detecting pulmonary embolism in the sickle cell population. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.726] [Citation(s) in RCA: 1] [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: 10/17/2022] Open
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13
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Fayyaz A, Khan JA, Ashraf MM, Akhter N, Aslam B, Khalid MF, Altaf S, Naseer RD, Akram M, Shah SMA, Khadam MW, Tahir IM. Pharmacokinetic behavior of montelukast in indigenous healthy male volunteers. Pak J Pharm Sci 2017; 30:2435-2439. [PMID: 29188782] [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: 06/07/2023]
Abstract
Aim of present study was to investigate the pharmacokinetic behavior of Montelukast in the healthy male volunteers under indigenous conditions. One tablet of montelukast 10 mg was administered in each subject and blood at different time intervals. Concentration of montelukast in plasma samples was analyzed by high performance liquid chromatography method to calculate pharmacokinetic parameters. The plasma concentration of montelukast was in the range of 1.31-1.76μg/mL at 0.5-12 hours with Cmax value of 1.59±0.16μg/mL at 3.71±0.64 hours. These values of plasma drug concentrations were above the minimum effective concentration of montelukast during the entire study hours. Absorption and elimination half-lives of the montelukast were evaluated as 2.52±0.54 hours and 2.63±0.35 hours, respectively. The volume of distribution and total body clearance of montelukast were investigated as 0.34±0.01 L/kg and 0.01±0.00 L/hr/kg, respectively. The pharmacokinetic parameters i.e. Cmax, AUC, t1/2, Vd and ClB of montelukast calculated in present study were found different as compared to that of the previous literature values which was due to genetic and environmental variation.
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Affiliation(s)
- Amtul Fayyaz
- Institute of Pharmacy, Physiology and Pharmacology, University of Agriculture, Faisalabad, Pakistan
| | - Junaid Ali Khan
- Institute of Pharmacy, Physiology and Pharmacology, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Mudassar Ashraf
- Institute of Pharmacy, Physiology and Pharmacology, University of Agriculture, Faisalabad, Pakistan / Department of Eastern Medicine, Directorate of Medical Sciences, Government College University, Faisalabad, Pakistan
| | - Naheed Akhter
- College of Allied Health Professionals, Directorate of Medical Sciences, Government College University, Faisalabad, Pakistan
| | - Bilal Aslam
- Institute of Pharmacy, Physiology and Pharmacology, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Fiaz Khalid
- Institute of Pharmacy, Physiology and Pharmacology, University of Agriculture, Faisalabad, Pakistan
| | - Sidra Altaf
- Institute of Pharmacy, Physiology and Pharmacology, University of Agriculture, Faisalabad, Pakistan
| | - Rana Dawood Naseer
- Institute of Pharmacy, Physiology and Pharmacology, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Akram
- Department of Eastern Medicine, Directorate of Medical Sciences, Government College University, Faisalabad, Pakistan
| | - Syed Muhammad Ali Shah
- Department of Eastern Medicine, Directorate of Medical Sciences, Government College University, Faisalabad, Pakistan
| | - Muhammad Waqas Khadam
- Institute of Pharmacy, Physiology and Pharmacology, University of Agriculture, Faisalabad, Pakistan
| | - Imtiaz Mahmood Tahir
- College of Allied Health Professionals, Directorate of Medical Sciences, Government College University, Faisalabad, Pakistan
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Khoder A, Sever M, Palanicawandar R, Pello O, Loaiza S, Bray E, Bradshaw A, Uddin S, Atta M, Selvaratnam V, Sevillano B, Monsalvo S, Altaf S, Innes A, Lozano S, Pavlu J, Auner H, Apperley J, Olavarria E, Kanfer E. Plerixafor effectively rescues biosimilar G-CSF-alone-based stem cell mobilisation failures. Cytotherapy 2017. [DOI: 10.1016/j.jcyt.2017.02.123] [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: 11/15/2022]
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Phipps-Green AJ, Merriman ME, Topless R, Altaf S, Montgomery GW, Franklin C, Jones GT, van Rij AM, White D, Stamp LK, Dalbeth N, Merriman TR. Twenty-eight loci that influence serum urate levels: analysis of association with gout. Ann Rheum Dis 2014; 75:124-30. [PMID: 25187157 DOI: 10.1136/annrheumdis-2014-205877] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 08/17/2014] [Indexed: 01/17/2023]
Abstract
OBJECTIVES Twenty-eight genetic loci are associated with serum urate levels in Europeans. Evidence for association with gout at most loci is absent, equivocal or not replicated. Our aim was to test the loci for association with gout meeting the American College of Rheumatology gout classification criteria in New Zealand European and Polynesian case-control sample sets. METHODS 648 European cases and 1550 controls, and 888 Polynesian (Ma¯ori and Pacific) cases and 1095 controls were genotyped. Association with gout was tested by logistic regression adjusting for age and sex. Power was adequate (>0.7) to detect effects of OR>1.3. RESULTS We focused on 24 loci without previous consistent evidence for association with gout. In Europeans, we detected association at seven loci, one of which was the first report of association with gout (IGF1R). In Polynesian, association was detected at three loci. Meta-analysis revealed association at eight loci-two had not previously been associated with gout (PDZK1 and MAF). In participants with higher Polynesian ancestry, there was association in an opposing direction to Europeans at PRKAG2 and HLF (HLF is the first report of association with gout). There was obvious inconsistency of gout association at four loci (GCKR, INHBC, SLC22A11, SLC16A9) that display very similar effects on urate levels. CONCLUSIONS We provide the first evidence for association with gout at four loci (IGF1R, PDZK1, MAF, HLF). Understanding why there is lack of correlation between urate and gout effect sizes will be important in understanding the aetiology of gout.
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Affiliation(s)
- A J Phipps-Green
- Department of Biochemistry, University of Otago, Dunedin, New Zealand
| | - M E Merriman
- Department of Biochemistry, University of Otago, Dunedin, New Zealand
| | - R Topless
- Department of Biochemistry, University of Otago, Dunedin, New Zealand
| | - S Altaf
- Department of Biochemistry, University of Otago, Dunedin, New Zealand
| | - G W Montgomery
- Queensland Institute of Medical Research, Brisbane, Queensland, Australia
| | - C Franklin
- Department of Medicine, University of Auckland, Auckland, New Zealand
| | - G T Jones
- Department of Medicine, University of Otago, Dunedin, New Zealand
| | - A M van Rij
- Department of Medicine, University of Otago, Dunedin, New Zealand
| | - D White
- Waikato District Health Board, Hamilton, New Zealand
| | - L K Stamp
- Department of Medicine, University of Otago, Christchurch, New Zealand
| | - N Dalbeth
- Department of Medicine, University of Auckland, Auckland, New Zealand
| | - T R Merriman
- Department of Biochemistry, University of Otago, Dunedin, New Zealand
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Bile K, Shadoul A, Raaijmakers H, Altaf S, Shabib K. Learning through crisis: development and implementation of a health cluster strategy for internally displaced persons. East Mediterr Health J 2010. [DOI: 10.26719/2010.16.supp.82] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Bile KM, Shadoul AF, Raaijmakers H, Altaf S, Shabib K. Learning through crisis: development and implementation of a health cluster strategy for internally displaced persons. East Mediterr Health J 2010; 16 Suppl:S82-S90. [PMID: 21495593] [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] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Affiliation(s)
- K M Bile
- World Health Organization, Country Office, Islamabad, Pakistan.
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Ali G, Mehtab K, Sheikh ZA, Ali HG, Abdel Kader S, Mansoor H, Altaf S, Qamar S, Khwaja SS. Beliefs and perceptions of acne among a sample of students from Sindh Medical College, Karachi. J PAK MED ASSOC 2010; 60:51-54. [PMID: 20055282] [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: 05/28/2023]
Abstract
OBJECTIVE To determine the beliefs of undergraduate medical students regarding acne. METHOD A cross-sectional study in 630 medical students (aged 16-29 years) was conducted. A voluntary self administered questionnaire was used to collect data regarding their beliefs and perceptions about acne. Both acne and non-acne sufferers were included in the study. RESULT Of the 630 respondents, 55.9% were sufferers while 44.1% were non-sufferers. Of all, 67.0% of the affected believed it to be relieved by frequent face washing and that they should seek treatment, whereas 79.84% students believed in seeking dermatologist's advice regarding treatment. Mass media was the most common source of information. As to the cause, 21.7% students believed that hereditary factors and 20.1% thought environmental factors are the major cause of acne. In diet, soft drinks (29.2%) were considered the major exacerbating factor. The most significant emotional impact of acne on medical students was embarrassment (26.2%). CONCLUSION The results of this study pointed out that misconceptions and false beliefs on acne are widespread and enduring among Medical students' too. Health education programme on acne is needed to improve their understanding of the condition.
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Affiliation(s)
- Ghulam Ali
- Sindh Medical College, DUHS, Karachi, Pakistan
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Abstract
OBJECTIVE To assess and explain deviations from recommended practice in National Institute for Clinical Excellence (NICE) guidelines in relation to fetal heart monitoring. DESIGN Qualitative study. SETTING Large teaching hospital in the UK. SAMPLE Sixty-six hours of observation of 25 labours and interviews with 20 midwives of varying grades. METHODS Structured observations of labour and semistructured interviews with midwives. Interviews were undertaken using a prompt guide, audiotaped, and transcribed verbatim. Analysis was based on the constant comparative method, assisted by QSR N5 software. MAIN OUTCOME MEASURES Deviations from recommended practice in relation to fetal monitoring and insights into why these occur. RESULTS All babies involved in the study were safely delivered, but 243 deviations from recommended practice in relation to NICE guidelines on fetal monitoring were identified, with the majority (80%) of these occurring in relation to documentation. Other deviations from recommended practice included indications for use of electronic fetal heart monitoring and conduct of fetal heart monitoring. There is evidence of difficulties with availability and maintenance of equipment, and some deficits in staff knowledge and skill. Differing orientations towards fetal monitoring were reported by midwives, which were likely to have impacts on practice. The initiation, management, and interpretation of fetal heart monitoring is complex and distributed across time, space, and professional boundaries, and practices in relation to fetal heart monitoring need to be understood within an organisational and social context. CONCLUSION Some deviations from best practice guidelines may be rectified through straightforward interventions including improved systems for managing equipment and training. Other deviations from recommended practice need to be understood as the outcomes of complex processes that are likely to defy easy resolution.
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Affiliation(s)
- S Altaf
- Social Science Group, Department of Health Sciences, University of Leicester, Leicester, UK
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Rizvi SSR, Altaf S, Latif S, Naseem AA, Afzal M, Qayyum M. Chronic orchidectomy does not influence the sensitivity of the pituitary somatotropes to varying doses of GHRH administered intravenously to the adult male rhesus monkey. Life Sci 2004; 75:1041-50. [PMID: 15207652 DOI: 10.1016/j.lfs.2003.12.011] [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] [Subscribe] [Scholar Register] [Received: 11/19/2003] [Accepted: 12/12/2003] [Indexed: 11/19/2022]
Abstract
In the present study, the pituitary growth hormone (GH) response to graded doses of GH-releasing hormone (GHRH) was determined in intact (n = 3) and chronically orchidectomized (n = 3) adult rhesus monkeys (Mucaca mulatta). GHRH in doses of 0, 6.25, 12.5 and 25 microg/kg BW was infused through a teflon cannula implanted in the saphenous vein. Blood samples were collected 60 min before and 90 min after the injection of the neurohormone at 15 min intervals. All bleedings were carried out under ketamine hydrochloride anesthesia. The plasma levels of GH were determined by using AutoDELFIA time-resolved flouroimmunoassay, whereas plasma levels of testosterone and estradiol were determined using specific radioimmunoassay systems. The GH responses to GHRH were not significantly different between intact and chronically orchidectomized monkeys at any of the dose levels tested (p > 0.05). The administration of GHRH resulted in a significant (p < 0.05) stimulation of GH secretion at all the doses tested and in both the groups studied. In both intact and orchidectomized animals, the greatest response was observed at 6.25 microg/kg and no further increase was noted with the higher doses of GHRH. In conclusion, the present study suggests that chronic orchidectomy does not influence the sensitivity of the pituitary somatotropes to GHRH stimulation implying that the responsiveness of the pituitary somatotropes to GHRH is independent of testicular steroid modulation.
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Affiliation(s)
- S S R Rizvi
- Pakistan Science Foundation, Constitution Avenue, G-5/2, Islamabad, Pakistan.
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Ather MH, Altaf S, Memon A. A critical step in the operative management of non-functioning asymptomatic incidentaloma. J PAK MED ASSOC 2001; 51:299-300. [PMID: 11715896] [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: 02/22/2023]
Affiliation(s)
- M H Ather
- Section of Urology, Department of Surgery, Aga Khan University Hospital, Karachi
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22
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Talic RF, El-Tiraifi AM, Altaf S, Hargreave TB. Changes of serum prostate-specific antigen following high energy thick loop prostatectomy. Int Urol Nephrol 2001; 32:271-4. [PMID: 11229647 DOI: 10.1023/a:1007170029017] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
We evaluated the effect of the high electrocuting energy used with the thick loop, in transurethral vaporization resection of the prostate (TUVRP), on serum prostate-specific antigen (PSA). Forty-eight patients with benign protatic hyperplasia (BPH) were included in this prospective single arm sequential study. All patients had TUVRP using the 'Wing' thick resection electrode (Richard Wolf, Germany). Serum PSA was measured before, 1 day and 6 weeks in the morning post TUVRP. PSA values were correlated to preoperative prostate size and to prostatic resection weight. Serum PSA values (mean +/- SD) were 6.29+/-4.4 ng/ml, 14.9+/-11.1 and 2.3+/-1.9 before, 1 day and 6 weeks post TUVRP respectively. The mean increase in the PSA at 1 day over baseline value was 2.72, this was statistically significant (p < or = 0.0001). The PSA level returned to less than pre TUVRP value in all but 3 patients by 6 weeks. The PSA value 1 day post TUVRP correlated well with the pre PSA level, prostate size and prostatic resection weight (r = 0.58, r = 0.38 and r = 0.44 respectively) however, the PSA level at 6 weeks correlated only to pre TUVRP values (r = 0.53). We conclude that that serum PSA is not reliable within 6 weeks of TUVRP. The reversible increase in serum PSA value is similar to other forms of prostatectomy which, suggests that the increased level of electrosurgical energy that is used in TUVRP does not have an added adverse effect on the PSA levels.
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Affiliation(s)
- R F Talic
- Department of Surgery, College of Medicine & King Khalid University Hospital, Riyadh, Saudi Arabia.
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Talic RF, Al Kudair WK, El Tiraifi AE, Al Bogami NM, Mansi MK, Altaf S, Hargreaves TB. The 'Wing' versus the 'Vapor Cut' electrodes in transurethral electrovaporization-resection of the prostate: comparative changes in safety parameters. Urol Int 2001; 65:95-9. [PMID: 11025431 DOI: 10.1159/000064847] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 11/19/2022]
Abstract
We compared the early safety features of two-band resection devices used in transurethral vaporization-resection of the prostate (TUVRP). Ninety patients with prostatic outflow obstruction were prospectively evaluated in two open studies for the treatment using the 'Wing' cutting electrode in group 1 (Richard Wolf, Germany) and the 'Vapor Cut' electrode in group 2 (Karl Storz, Germany). Patients in both groups were comparable in age, presentation, prostate size and blood parameters. Safety features evaluated included changes in serum hemoglobin, hematocrit, sodium concentration and incidence of side effects. The mean drop in hemoglobin, hematocrit and serum sodium 1 h postoperatively for the Wing group were 0.54 g/dl, 2.04 ml/dl and 0.084 mEq/l respectively compared to a mean drop of 1.1 g/dl, 3.07 ml/dl and 3.1 mEq/l in the Vapor Cut group. These differences were statistically significant (p = 0.004, 0.03 and <0.0001 respectively). The mean resection weight was 24.78 +/- 10.4 and 24.46 +/- 14.79 g in groups 1 and 2, respectively; however, the mean operation time was significantly longer in the Wing group (47.7 vs. 37.1 min, p = 0.003). We conclude that both loops were safe and efficacious in the treatment of patients with prostatic outflow obstruction. Safety features that are related to the vaporization effect are influenced by the speed of resection.
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Affiliation(s)
- R F Talic
- Division of Urology, College of Medicine and King Khalid University Hospital, Riyadh, Saudi Arabia.
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Rizvi SS, Altaf S, Naseem AA, Asif M, Rasul Z, Qayyum M. The effect of ketamine hydrochloride anesthesia on basal and N-methyl-D,L-aspartate induced plasma prolactin secretion in the adult male rhesus monkey. Life Sci 2001; 68:1083-93. [PMID: 11212871 DOI: 10.1016/s0024-3205(00)01010-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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
The excitatory amino acids (EAAs), glutamate and aspartate, acting predominantly on N-methyl-D-aspartate (NMDA) receptor, have been shown to be involved in the central regulation of the secretion of several anterior pituitary hormones including prolactin (PRL), whereas ketamine hydrochloride (KH), a widely used anesthetic, has been reported to antagonize a variety of NMDA receptor mediated actions of these EAAs. In the present study, the effect of KH on basal PRL levels as well as on N-methyl-D,L-aspartate (NMA), an agonist of NMDA receptor, induced plasma PRL secretion was investigated in the adult male rhesus monkey. The values were compared to those obtained from the same animals restrained in primate chairs. The plasma PRL concentrations were higher in animals receiving KH administered either intramuscularly (2.5 mg/kg BW at 30 min intervals) or intravenously (10 mg/kg BW) as compared to those observed in the unanesthetized chair-restrained monkeys. NMA induced an unequivocal increase in plasma PRL concentrations in both conscious chair-restrained and KH anesthetized monkeys, but the response was greater in anesthetized animals than the conscious monkeys. The present findings suggest that KH has stimulatory effects on both basal and NMA induced plasma PRL secretion.
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Affiliation(s)
- S S Rizvi
- Pakistan Science Foundation, Islamabad.
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Rizvi SS, Altaf S. Differential effects of N-methyl-D-aspartate receptor stimulation on growth hormone secretion at specific stages of postnatal development of the male rhesus monkey. Life Sci 2000; 67:783-97. [PMID: 10968408 DOI: 10.1016/s0024-3205(00)00673-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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
The present study attempts to examine the role of N-methyl-D-aspartate (NMDA) receptor in the central regulation of growth hormone (GH) secretion during specific stages of pubertal development of the male rhesus monkey (Macaca mulatta). Infantile (n=4), prepubertal (n=5), peripubertal (n=5) and adult (n=5) intact male rhesus monkeys were given an agonist of NMDA receptor, N-methyl-D,L-aspartate (NMA) (15 mg/kg BW) through a teflon cannula implanted in the saphenous vein. Blood samples were collected 20-60 min before and 40-80 min after the injection of the drug at 10-20 min intervals. NMA was dissolved in normal saline immediately before use and passed through a 0.22 microm filter at the time of injection. All bleedings were carried out under ketamine hydrochloride anesthesia (initial dose 5 mg/kg BW, im followed by 2.5 mg/kg at 30 min intervals). The plasma levels of GH and testosterone (T) were determined by using specific assay systems. The hypothalamic-somatotrope activity under basal conditions was studied by averaging all the GH concentrations obtained before NMA injection, whereas the sensitivity of NMDA receptor to NMA stimulation was determined by comparing basal GH levels immediately before NMA injection at 0 min and GH concentrations obtained 10 min after the injection. The mean basal plasma concentrations of GH in the four groups of animals showed marked age-related differences. The levels of GH were found to be higher in infantile and peripubertal monkeys as compared to those of prepubertal and adult animals. A single iv injection of NMA produced differential effects on GH secretion during specific stages of postnatal development depending upon the level of GH secretion under basal conditions. Whereas NMA had no demonstrable effect on GH secretion in infantile and peripubertal animals in which the basal GH levels were high, it produced pronounced effects on GH secretion in prepubertal and adult monkeys wherein baseline GH concentrations were low. In conclusion, the present study suggests that the glutamatergic component of the control system that governs GH secretion by utilizing NMDA receptor may participate in regulation of age-related changes in the secretion of GH in the male rhesus monkey.
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Affiliation(s)
- S S Rizvi
- Pakistan Science Foundation, Islamabad.
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