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Hasnain M, Kanwal T, Rehman K, Rehman SRU, Aslam S, Roome T, Perveen S, Zaidi MB, Saifullah S, Yasmeen S, Hasan A, Shah MR. Microarray needles comprised of arginine-modified chitosan/PVA hydrogel for enhanced antibacterial and wound healing potential of curcumin. Int J Biol Macromol 2023; 253:126697. [PMID: 37673138 DOI: 10.1016/j.ijbiomac.2023.126697] [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: 05/06/2023] [Revised: 09/01/2023] [Accepted: 09/02/2023] [Indexed: 09/08/2023]
Abstract
Wound healing is a multifaceted and complex process that includes inflammation, hemostasis, remodeling, and granulation. Failures in any link may cause the healing process to be delayed. As a result, wound healing has always been a main research focus across the entire medical field, posing significant challenges and financial burdens. Hence, the current investigation focused on the design and development of arginine-modified chitosan/PVA hydrogel-based microneedles (MNs) as a curcumin (CUR) delivery system for improved wound healing and antibacterial activity. The substrate possesses exceptional swelling capabilities that allow tissue fluid from the wound to be absorbed, speeding up wound closure. The antibacterial activity of MNs was investigated against S. aureus and E. coli. The results revealed that the developed CUR-loaded MNs had increased antioxidant activity and sustained drug release behavior. Furthermore, after being loaded in the developed MNs, it revealed improved antibacterial activity of CUR. Wound healing potential was assessed by histopathological analysis and wound closure%. The observed results suggest that the CUR-loaded MNs greatly improved wound healing potential via tissue regeneration and collagen deposition, demonstrating the potential of developed MNs patches to be used as an effective carrier for wound healing in healthcare settings.
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Affiliation(s)
- Muhammad Hasnain
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Tasmina Kanwal
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Khadija Rehman
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.
| | - Syed Raza Ur Rehman
- Mechanical and Industrial Engineering, Qatar University, 2713, Doha, Qatar; Biomedical Research Center, Qatar University, 2713, Doha, Qatar.
| | - Shazmeen Aslam
- Dow Institute for Advanced Biological and Animal Research, Dow International Medical College, Dow University of Health Sciences, Karachi 74200, Pakistan.
| | - Talat Roome
- Dow Institute for Advanced Biological and Animal Research, Dow International Medical College, Dow University of Health Sciences, Karachi 74200, Pakistan; Molecular Pathology Section, Department of Pathology, Dow Diagnostic Reference and Research Laboratory, Dow University of Health Sciences, Karachi 74200, Pakistan.
| | - Samina Perveen
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, PR China
| | - Midhat Batool Zaidi
- Dow Institute for Advanced Biological and Animal Research, Dow International Medical College, Dow University of Health Sciences, Karachi 74200, Pakistan.
| | - Salim Saifullah
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; Pakistan Forest Institute Peshawar, Pakistan
| | - Saira Yasmeen
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Anwarul Hasan
- Mechanical and Industrial Engineering, Qatar University, 2713, Doha, Qatar; Biomedical Research Center, Qatar University, 2713, Doha, Qatar
| | - Muhammad Raza Shah
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.
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Jabbar A, Rehman K, Jabri T, Kanwal T, Perveen S, Rashid MA, Kazi M, Ahmad Khan S, Saifullah S, Shah MR. Improving curcumin bactericidal potential against multi-drug resistant bacteria via its loading in polydopamine coated zinc-based metal-organic frameworks. Drug Deliv 2023; 30:2159587. [PMID: 36718806 PMCID: PMC9891165 DOI: 10.1080/10717544.2022.2159587] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Multi-drug resistant (MDR) bactearial strains have posed serious health issues, thus leading to a significant increase in mortality, morbidity, and the expensive treatment of infections. Metal-organic frameworks (MOFs), comprising metal ions and a variety of organic ligands, have been employed as an effective drug deliveryy vehicle due to their low toxicity, biodegradability, higher structural integrity and diverse surface functionalities. Polydopamine (PDA) is a versatile biocompatible polymer with several interesting properties, including the ability to adhere to biological surfaces. As a result, modifying drug delivery vehicles with PDA has the potential to improve their antimicrobial properties. This work describes the preparation of PDA-coated Zn-MOFs for improving curcumin's antibacterial properties against S. aureus and E. coli. Powder X-ray diffraction (P-XRD), FT-IR, scanning electron microscopy (SEM), and DLS were utilized to characterize PDA-coated Zn-MOFs. The curcumin loading and in vitro release of the prepared MOFs were also examined. Finally, the MOFs were tested for bactericidal ability against E. coli and S. aureus using an anti-bacterial assay and surface morphological analysis. Smaller size MOFs were capable of loading and releasing curcumin. The findings showed that as curcumin was encapsulated into PDA-coated MOFs, its bactericidal potential was significantly enhanced, and the findings were further supported by SEM which indicated the complete morphological distortion of the bacteria after treatment with PDA-Cur-Zn-MOFs. These studies clearly indicate that the PDA-Cur-Zn-MOFs developed in this study are extremely promising for long-term release of drugs to treat a wide range of microbial infections.
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Affiliation(s)
- Abdul Jabbar
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Khadija Rehman
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Tooba Jabri
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Tasmina Kanwal
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Samina Perveen
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, PR China
| | - Md Abdur Rashid
- Department of Pharmaceutics, College of Pharmacy, King Khalid University, Guraiger, Abha, Saudi Arabia,Pharmacy Discipline, Faculty of Health, School of Clinical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia,Md Abdur Rashid Department of Pharmaceutics, College of Pharmacy, King Khalid University, Guraiger, Abha62529, Saudi Arabia; Pharmacy Discipline, Faculty of Health, School of Clinical Sciences, Queensland University of Technology, Brisbane, QLD4000, Australia
| | - Mohsin Kazi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Saeed Ahmad Khan
- Department of Pharmacy, Kohat University of Science and Technology, Kohat, Pakistan,Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, Texas, USA
| | - Salim Saifullah
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan,Pakistan Forest Institute, Peshawar, Pakistan
| | - Muhammad Raza Shah
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan,CONTACT Muhammad Raza Shah International Center for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, 74200Karachi, Pakistan
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Abdullah M, Kanwal T, Shuja AA, Rao K, Rehman K, Kawish M, Simjee SU, Sirajuddin, Shah MR. Synthesis and characterization of cinnamic acid based glyceride and its application for developing self-nanoemulsifying drug delivery system for curcumin oral delivery. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133131] [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: 11/29/2022]
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Aslam Z, Roome T, Razzak A, Aslam SM, Zaidi MB, Kanwal T, Sikandar B, Bertino MF, Rehman K, Shah MR. Investigation of wound healing potential of photo-active curcumin-ZnO-nanoconjugates in excisional wound model. Photodiagnosis Photodyn Ther 2022; 39:102956. [PMID: 35714899 DOI: 10.1016/j.pdpdt.2022.102956] [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: 03/13/2022] [Revised: 05/23/2022] [Accepted: 06/07/2022] [Indexed: 11/16/2022]
Abstract
Wound healing, being a dynamic process consisting of hemostasis, inflammation, proliferation, and remodeling, involves the complicated interplay of various growth mediators and the cells associated repair system. Current wound healing therapies usually fail to completely regain skin integrity and functionality. Traditionally, curcumin is considered a potent natural wound healing agent as it possesses antibacterial, antioxidant, and anti-inflammatory properties. It is also known that zinc oxide (ZnO) nanoparticles (NPs) have photocatalytic properties, including the generation of reactive oxygen species. ZnO nanoaprticles are also Food and Drug Administration (FDA) approved as safe substances. While ZnO oxide requires illumination with ultraviolet light to become photocatalytically active, dye-sensitized ZnO can be activated by illumination with visible light. In the present study, we explored the wound healing potential of ZnO nanoparticles sensitized with curcumin (Cu+ZnO Nps) and illuminated with visible (blue) light generated by an array of high power LEDs. We studied the antibacterial effect of our conjugates by percentage reduction in bacterial growth and biofilm formation. The wound healing potential was analyzed by percentage wound contraction, biochemical parameters, and histopathological analysis of the wounded site. Additionally, angiogenesis and wound associated cytokines was evaluated by immunohistochemistry of CD31 and gene expression analysis of IL-1β, TNF-α, and MMP-9 after 16 days of post-wound treatment, respectively. Our study suggests that the therapeutic effect of Cu+ZnO NPs with LED illumination increases its wound healing potential by producing an antibacterial and anti-inflammatory effect. Moreover, the treatment strategy of using a nano formulation in combination with LED illumination further increases its efficacy. It was concluded that the anti-inflammatory and bactericidal effects of the LED illuminated Cu+ZnO Np showed accelerated wound healing with increased wound contraction, collagen deposition, angiogenesis, and re-epithelialization.
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Affiliation(s)
- Zara Aslam
- HEJ Research Institute of Chemistry, International Center for Chemical and Biological Sciences, Karachi University, Karachi, 74200, Pakistan.
| | - Talat Roome
- Molecular Pathology Section, Dow Diagnostic Reference and Research Laboratory, Department of Pathology, Dow International Medical College, Dow University of Health Sciences, Karachi, 74200, Pakistan; Dow Institute of Advanced Biological & Animal Research, Dow University of Health Sciences, Karachi, 74200, Pakistan.
| | - Anam Razzak
- Molecular Pathology Section, Dow Diagnostic Reference and Research Laboratory, Department of Pathology, Dow International Medical College, Dow University of Health Sciences, Karachi, 74200, Pakistan; Dow Institute of Advanced Biological & Animal Research, Dow University of Health Sciences, Karachi, 74200, Pakistan.
| | - Shazmeen Mohammad Aslam
- Dow Institute of Advanced Biological & Animal Research, Dow University of Health Sciences, Karachi, 74200, Pakistan.
| | - Midhat Batool Zaidi
- Dow Institute of Advanced Biological & Animal Research, Dow University of Health Sciences, Karachi, 74200, Pakistan.
| | - Tasmina Kanwal
- HEJ Research Institute of Chemistry, International Center for Chemical and Biological Sciences, Karachi University, Karachi, 74200, Pakistan.
| | - Bushra Sikandar
- Histopathology Section, Department of Pathology, Dow Diagnostic Reference and Research Laboratory, Dow Medical College, Dow University of Health Sciences, Karachi, 74200, Pakistan.
| | | | - Khadija Rehman
- HEJ Research Institute of Chemistry, International Center for Chemical and Biological Sciences, Karachi University, Karachi, 74200, Pakistan.
| | - Muhammad Raza Shah
- HEJ Research Institute of Chemistry, International Center for Chemical and Biological Sciences, Karachi University, Karachi, 74200, Pakistan.
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Rehman K, Ali I, El-Haj BM, Kanwal T, Maharjan R, Saifullah S, Imran M, Shafiullah, Usman Simjee S, Raza Shah M. Synthesis of novel biocompatible resorcinarene based nanosized dendrimer-vesicles for enhanced anti-bacterial potential of quercetin. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116921] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Rakha A, Rehman K, Shahid M, Jahan N, Babar Imran M. Salivary flow rate and radioactivity in saliva, blood and serum of benign and malignant thyroid patients after 131I therapy. INT J RADIAT RES 2021. [DOI: 10.29252/ijrr.19.1.197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Ali F, Kibria Z, Rehman K, Arshad M, Mahnaz R, Arif N, Ul Haq Z, Ghulam R. Prevalence of parents refusal rate, its associated factors and the perceptions of refusal parents in routine immunization: New findings from Pakistan. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.1267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Yasmeen T, Ahmad A, Arif MS, Mubin M, Rehman K, Shahzad SM, Iqbal S, Rizwan M, Ali S, Alyemeni MN, Wijaya L. Biofilm forming rhizobacteria enhance growth and salt tolerance in sunflower plants by stimulating antioxidant enzymes activity. Plant Physiol Biochem 2020; 156:242-256. [PMID: 32979797 DOI: 10.1016/j.plaphy.2020.09.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [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: 07/08/2020] [Accepted: 09/04/2020] [Indexed: 05/25/2023]
Abstract
Salinity stress is one of the major environmental stresses that impose global socio-economic impacts, as well as hindering crop productivity. Halotolerant plant growth-promoting rhizobacteria (PGPR) having potential to cope with salinity stress can be employed to counter this issue in eco-friendly way. In the present investigation, halotolerant PGPR strains, AP6 and PB5, were isolated from saline soil and characterized for their biochemical, molecular and physiological traits. Sequencing of 16 S rRNA gene and comparative analysis confirmed the taxonomic affiliation of AP6 with Bacillus licheniformis and PB5 with Pseudomonas plecoglossicida. The study was carried out in pots with different levels of induced soil salinity viz. 0, 5, 10 and 15 dSm-1 to evaluate the potential of bacterial inoculants in counteracting salinity stress in sunflower at different plant growth stages (30, 45 and 60 days after sowing). Both the bacterial inoculants were capable of producing indole acetic acid and biofilm, solubilizing inorganic rock phosphate, and also expressed ACC deaminase activity. The PGPR inoculated plants showed significantly higher fresh and dry biomass, plant height, root length and yield plant-1. Ameliorative significance of applied bacterial inoculants was also evidenced by mitigating oxidative stress through upregulation of catalase (CAT), superoxide dismutase (SOD) and guaiacol peroxidase (GPX) antioxidant enzymes. Increase in photosynthetic pigments, gas exchange activities and nutrient uptake are crucial salt stress adaptations, which were enhanced with the inoculation of salt tolerant biofilm producing PGPR in sunflower plants. Although increase in salinity stress levels has gradually decreased the plant's output compared to non-salinized plants, the plants inoculated with PGPR confronted salinity stress in much better way than uninoculated plants. Owing to the wide action spectrum of these bacterial inoculants, it was concluded that these biofilm PGPR could serve as effective bioinoculants and salinity stress alleviator for sunflower (oil seed crop) by increasing crop productivity in marginalized agricultural systems.
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Affiliation(s)
- Tahira Yasmeen
- Department of Environmental Sciences and Engineering, Government College University Faisalabad, 38000, Pakistan.
| | - Aqeel Ahmad
- Department of Environmental Sciences and Engineering, Government College University Faisalabad, 38000, Pakistan
| | - Muhammad Saleem Arif
- Department of Environmental Sciences and Engineering, Government College University Faisalabad, 38000, Pakistan
| | - Muhammad Mubin
- Centre of Agricultural Biochemistry and Biotechnology, University of Agriculture, Faisalabad, Pakistan
| | - Khadija Rehman
- Department of Environmental Sciences and Engineering, Government College University Faisalabad, 38000, Pakistan
| | - Sher Muhammad Shahzad
- Department of Soil and Environmental Sciences, University College of Agriculture, University of Sargodha, Sargodha, 40100, Punjab, Pakistan
| | - Shahid Iqbal
- Key Laboratory for Economic Plants and Biotechnology, Centre for Mountain Futures CMF, East and Central Asia Regional Office, World Agroforestry Centre ICRAF, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, CN 650201, China
| | - Muhammad Rizwan
- Department of Environmental Sciences and Engineering, Government College University Faisalabad, 38000, Pakistan
| | - Shafaqat Ali
- Department of Environmental Sciences and Engineering, Government College University Faisalabad, 38000, Pakistan; Department of Biological Sciences and Technology, China Medical University, Taichung, 40402, Taiwan.
| | - Mohammed Nasser Alyemeni
- Department of Botany and Microbiology, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Leonard Wijaya
- Department of Botany and Microbiology, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
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Breeze J, Morrison A, Dawson D, Tipper J, Rehman K, Grew N, Pigadas N. Health-related quality of life after treatment for neoplasia of the major salivary glands: a pilot study. Br J Oral Maxillofac Surg 2016; 54:806-11. [DOI: 10.1016/j.bjoms.2016.05.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 05/17/2016] [Indexed: 10/21/2022]
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10
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Breeze J, Rennie A, Morrison A, Dawson D, Tipper J, Rehman K, Grew N, Snee D, Pigadas N. Health-related quality of life after maxillectomy: obturator rehabilitation compared with flap reconstruction. Br J Oral Maxillofac Surg 2016; 54:857-862. [PMID: 27266975 DOI: 10.1016/j.bjoms.2016.05.024] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [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: 01/12/2016] [Accepted: 05/22/2016] [Indexed: 11/16/2022]
Abstract
Health-related quality of life (QoL) reported by patients has the potential to improve care after ablative surgery of the midface, as existing treatment algorithms still generally revolve around outcomes assessed traditionally only by clinicians. Decisions in particular relate to reconstruction with a flap compared with rehabilitation with an obturator, the need for adjuvant treatment, and morbidity related to the size of the defect. We prospectively collected health-related QoL assessments for 39 consecutive patients treated by maxillectomy between 01 January 2010 and 31 December 2014 using the University of Washington Quality of Life Questionnaire, and who had a mean (SD) duration of follow-up of 14 (4). We made sub-group analyses using paired t tests and analysis of variance (ANOVA) to compare reconstruction with a flap with rehabilitation with obturators, size of the vertical defect, and whether adjuvant treatment with radiotherapy or chemoradiotherapy adversely affected it. Overall there was a significant decrease in health-related QoL after treatment compared with before (p<0.001), but there was no significant difference in the effects of any of the paired reconstructive and rehabilitation treatments on it. Obturators remain an important option for rehabilitation in selected patients in addition to reconstruction with a flap. We found that neither increasing the size of the vertical defect (in an attempt to ensure clear margins) nor the use of postoperative radiotherapy seemed to have any adverse effect on QoL. More patients are required before we can conclude that the potential survival benefits of such measures may outweigh any adverse effects.
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Affiliation(s)
- J Breeze
- Department of Oral and Maxillofacial Surgery, New Cross Hospital, Wolverhampton, England WV10 0QP; Academic Department of Military Surgery and Trauma, Royal Centre for Defence Medicine, Birmingham Research Park, Birmingham B15 2SQ
| | - A Rennie
- Department of Oral and Maxillofacial Surgery, New Cross Hospital, Wolverhampton, England WV10 0QP
| | - A Morrison
- Biostatistical Operations, Worldwide Clinical Trials, Isaac Newton Centre, Nottingham Science Park, Nottingham, England NG7 2RH
| | - D Dawson
- Department of Oral and Maxillofacial Surgery, New Cross Hospital, Wolverhampton, England WV10 0QP
| | - J Tipper
- Department of Oral and Maxillofacial Surgery, New Cross Hospital, Wolverhampton, England WV10 0QP
| | - K Rehman
- Department of Oral and Maxillofacial Surgery, New Cross Hospital, Wolverhampton, England WV10 0QP
| | - N Grew
- Department of Oral and Maxillofacial Surgery, New Cross Hospital, Wolverhampton, England WV10 0QP
| | - D Snee
- Department of Oral and Maxillofacial Surgery, New Cross Hospital, Wolverhampton, England WV10 0QP
| | - N Pigadas
- Department of Oral and Maxillofacial Surgery, New Cross Hospital, Wolverhampton, England WV10 0QP
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Balasundaram I, Al-Hadad I, Rehman K, McCafferty I, Monaghan A. The use of foam sclerotherapy to treat low-flow vascular malformations of the head and neck. J Surg Case Rep 2014; 2014:rju095. [PMID: 25252734 PMCID: PMC4172995 DOI: 10.1093/jscr/rju095] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Liquid sclerotherapy, laser and surgery have been used in the treatment of head and neck vascular anomalies with variable success for many years. A multidisciplinary team consisting of plastic surgery, maxillofacial surgery and interventional radiology currently treats such lesions by converting liquid sclerosant into foam. Foam sclerotherapy is currently used successfully to treat varicosities of the lower limbs and in this study, we present four cases in which 3% sodium tetradecyl sulfate has been used to treat low-flow vascular malformations in the head and neck.
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Affiliation(s)
- I Balasundaram
- Department of Oral and Maxillofacial Surgery, University Hospital Birmingham Foundation NHS Trust, Birmingham, UK
| | - I Al-Hadad
- Department of Oral and Maxillofacial Surgery, University Hospital Birmingham Foundation NHS Trust, Birmingham, UK
| | - K Rehman
- Department of Oral and Maxillofacial Surgery, University Hospital Birmingham Foundation NHS Trust, Birmingham, UK
| | - I McCafferty
- Department of Radiology, University Hospital Birmingham Foundation NHS Trust, Birmingham, UK
| | - A Monaghan
- Department of Oral and Maxillofacial Surgery, University Hospital Birmingham Foundation NHS Trust, Birmingham, UK
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Rehman K, Tan CM, Zulfakar MH. Development and in-vitro characterization of fish oil oleogels containing benzoyl peroxide and salicylic acid as keratolytic agents. Drug Res (Stuttg) 2013; 64:159-65. [PMID: 24026957 DOI: 10.1055/s-0033-1355351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Topical keratolytic agents such as benzoyl peroxide (BP) and salicylic acid (SA) are one of the common treatments for inflammatory skin diseases. However, the amount of drug delivery through the skin is limited due to the stratum corneum. The purposes of this study were to investigate the ability of fish oil to act as penetration enhancer for topical keratolytic agents and to determine the suitable gelator for formulating stable fish oil oleogels. 2 types of gelling agents, beeswax and sorbitan monostearate (Span 60), were used to formulate oleogels. To investigate the efficacy of fish oil oleogel permeation, commercial hydrogels of benzoyl peroxide (BP) and salicylic acid (SA) were used as control, and comparative analysis was performed using Franz diffusion cell. Stability of oleogels was determined by physical assessments at 20°C and 40°C storage. Benzoyl peroxide (BP) fish oil oleogels containing beeswax were considered as better formulations in terms of drug permeation and cumulative drug release. All the results were found to be statistically significant (p<0.05, ANOVA) and it was concluded that the beeswax-fish oil combination in oleogel can prove to be beneficial in terms of permeation across the skin and stability.
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Affiliation(s)
- K Rehman
- Centre for Drug Delivery Research, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - C M Tan
- Centre for Drug Delivery Research, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - M H Zulfakar
- Centre for Drug Delivery Research, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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Affiliation(s)
- K. Rehman
- Centre for Drug Delivery Research, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - M. Amin
- Centre for Drug Delivery Research, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - S. Muda
- Centre for Drug Delivery Research, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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Rehman K, Amin MCIM, Muda S. Influence of beta-cyclodextrin and chitosan in the formulation of a colon-specific drug delivery system. Drug Res (Stuttg) 2013; 63:657-62. [PMID: 23842943 DOI: 10.1055/s-0033-1349129] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The increase in diseases of the colon underscores the need to develop cost-effective site-directed therapies. We formulated a polysaccharide-based matrix system that could release ibuprofen under conditions simulating those in the colon by employing a wet granulation method. Tablets were prepared in a series of formulations containing a polysaccharide (beta-cyclodextrin and chitosan) matrix system along with ethylcellulose. We characterized physicochemical properties and performed an in vitro drug release assay in the absence and presence of digestive enzymes to assess the ability of the polysaccharides to function as a protective barrier against the upper gastrointestinal environment. Fourier transform infrared spectroscopy studies revealed no chemical interaction between ibuprofen and polysaccharides; however, spectrum analysis suggested the formation of an inclusion complex of beta-cyclodextrin with ibuprofen. The formulations contained 50% ethylcellulose and 50% beta-cyclodextrins (1:1) were proven to be the better formulation that slowly released the drug until 24 h (101.04 ± 0.65% maximum drug release in which 83.08 ± 0.89% drug was released in colonic medium) showed better drug release profiles than the formulations containing chitosan. We conclude that a beta-cyclodextrin drug carrier system may represent an effective approach for treatment of diseases of the colon.
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Affiliation(s)
- K Rehman
- Centre for Drug Delivery Research, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - M C I M Amin
- Centre for Drug Delivery Research, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - S Muda
- Centre for Drug Delivery Research, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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Mehmood T, Rashid A, Usman S, Irfan M, Haider I, Rehman K. 5P EGFR GENE MUTATION IN ADVANCED NON-SMALL CELL LUNG CANCER. Lung Cancer 2013. [DOI: 10.1016/s0169-5002(13)70227-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Mehmood T, Ali M, Masood A, Haider I, Rehman K, Rashid A, Shah M, Jamshed A. Frequency of Pathological Complete Response with Adriamycin and Taxanes Based Neo-Adjuvant Chemotherapy in Non-Metastatic Breast Cancer. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt080.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Bajwa H, Rehman K, Niazi I, Ali M, Haider I, Usman S, Masood A. PO-251 IMPACT OF BLADDER DISTENSION ON ORGANS AT RISK IN 3D INTRACAVITARY BRACHYTHERAPY FOR GYNECOLOGICAL CANCER. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)72217-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: 11/30/2022]
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Rehman K, Akash MSH, Azhar S, Khan SA, Abid R, Waseem A, Murtaza G, Sherazi TA. A biochemical and histopathologic study showing protection and treatment of gentamicin-induced nephrotoxicity in rabbits using vitamin C. Afr J Tradit Complement Altern Med 2012; 9:360-5. [PMID: 23983367 DOI: 10.4314/ajtcam.v9i3.9] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Gentamicin and vitamin C have been proposed as nephrotoxic and antioxidant, respectively. This study involved biochemical and histopathologic investigation showing protection and treatment of gentamicin-induced nephrotoxicity in rabbits using vitamin C for 26 days hypothesizing that whether vitamin C would inhibit or decrease the raised serum urea and creatinine levels. This study was conducted on 25 healthy male albino rabbits (average weight 1.5±0.2 kg), classified into 5 groups: group A, B, C, D and E for nephrocurative (study-I) and nephroprotective (study-II) studies. Control group of rabbits (group A) received only the vehicle of gentamicin ampoule. In study-I, gentamicin sulphate (GS 80 mg/kg, i.m.) was administered to group B and C rabbits for ten days, then group C rabbits received vitamin C 250 mg/Kg for remaining 16 days. Group D and E received GS 80 mg/kg and GS 80 mg/kg i.m.-vitamin C 250 mg/kg orally, respectively during whole period (26 days) of study-II. After 26 days, various biochemical parameters, i.e. serum creatinine, blood urea nitrogen (BUN), and serum antioxidant activity, and histopathologic investigations were made. Nephrotoxicity was observed in rabbit groups B, C and D as evident from significant (p<0.05) high levels of serum creatinine and BUN and low serum antioxidant levels as compared to the levels of control group. Decrease in the levels of serum creatinine and BUN along with the increase in serum antioxidant activity was observed after vitamin C treatment in group C. While, renal-protective role of vitamin C was seen in group E as compared to the control. In conclusion, Gentamicin induced nephrotoxicity can be attenuated or treated using vitamin C.
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Affiliation(s)
- K Rehman
- Institute of Pharmacology, Toxicology and Biochemical Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University Hangzhou, China
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Abstract
An 80 year old man presented with a twelve month history of progressive multiple unilateral cranial nerve palsies. A gadolinium enhanced MRI scan of his head and neck was performed. This showed an extra-axial enhancing lesion, which enveloped the hemi-mandible at the level of the left inferior alveolar nerve, and a dumbbell shaped lesion within the cerebellopontine angle. An incisional biopsy was performed to gain a tissue diagnosis, which demonstrated a Non-Hodgkin’s Lymphoma. The combination of signs, symptoms and radiological findings enabled a diagnosis of Garcin’s Syndrome secondary to Non-Hodgkin’s Lymphoma.
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Affiliation(s)
- D Hammond
- New Cross Hospital, Wolverhampton, UK
| | - K Rehman
- New Cross Hospital, Wolverhampton, UK
| | - N Grew
- New Cross Hospital, Wolverhampton, UK
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Dodson E, Martin T, Rehman K, Parmar S. Condylar reconstruction using a combination of bony flaps and condylar prosthesis. Br J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.bjoms.2011.03.073] [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]
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Gadhia K, Rehman K, Williams RW, Sharp I. Traumatic pseudolipoma: herniation of buccal fat pad, a report of two cases. Int J Oral Maxillofac Surg 2009; 38:694-6. [PMID: 19179045 DOI: 10.1016/j.ijom.2008.12.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2008] [Revised: 07/05/2008] [Accepted: 12/22/2008] [Indexed: 12/16/2022]
Abstract
Traumatic pseudolipoma is a term used to describe intra-oral herniation of the buccal fat pad. A tear of the buccinator muscle and buccal mucosa allows the buccal fat pad to extrude into the oral cavity. Initially, the lesion can suggest a more sinister cause, but a history of trauma, an absence of mass before the accident, anatomical site and fatty appearance should suggest a diagnosis of traumatic herniation of buccal fat pad. This injury is rare, but two cases presented to the authors' hospital over a period of 3 months.
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Affiliation(s)
- K Gadhia
- Birmingham Children's Hospital, Birmingham, United Kingdom.
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Hussain R, Jamshed A, Rehman K, Iqbal H, Azhar R, Faruqui Z, Ahmed Q. Function preservation with multimodality treatment in locally advanced oral tongue cancer. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e17051] [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: 11/20/2022] Open
Abstract
e17051 Background: Total or near total glossectomy with postoperative radiation is a standard treatment option for locally advanced squamous cell carcinoma oral tongue (LASCCOT). However, the procedure is controversial due to dismal cure rates and major functional deficits that impact on speech, deglutition and quality of life. We evaluated function preservation and survival outcome in LASCCOT treated with induction chemotherapy, limited surgery, and postoperative radiation/chemoradiation. Methods: We retrospectively identified 15 patients with LASCCOT treated with induction chemotherapy, limited surgery and postoperative radiation/chemoradiation at our institution between 04/07 - 04–08. M67%:F33% median age 50 years. Pretreatment AJCC stage as assessed on MRI was T2N+ (tumour crossing midline) 13%, T3N0 20%, T3N+ 47%, and T4N+ 20%. Prior to surgery induction chemotherapy, consisting of cisplatin 75 mg/m2 day 1 and gemcitabine 1 mg/m2 day 1 and 8 every three weeks for 2 cycles was given. Four to six weeks following second cycle of chemotherapy local excision of residual primary tumor with ipsilateral modified neck dissection was performed. Postoperative radiation dose was 60Gy/30 fractions. Post therapy pathological stage was ypT0N0 20%, ypT1N0 20%, ypT1N+ 40%, ypT2N+ 13%, and ypT3N+ 7%. Patients with ypN+ disease received concomitant 3 weekly cisplatin 75 mg/m2 with radiation. Results: Overall and disease free survival at 20 months was 60%. Twelve patients (80%) are alive and 3 patients (20%) have died of disease at 9, 14 and 14 months (locoregional failure 1 and distant metastasis 2 patients). In patients alive without disease assessment of deglutition and speech at the time of last follow up showed all patients on full oral diet with spontaneous intelligible speech. Conclusions: Multimodality treatment with induction chemotherapy, limited surgery and post operative radiation/chemoradiation may allow selected LASCCOT patients to avoid morbid surgery and preserve tongue function without compromising survival. This approach merits further investigation in clinical trials. No significant financial relationships to disclose.
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Affiliation(s)
- R. Hussain
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - A. Jamshed
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - K. Rehman
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - H. Iqbal
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - R. Azhar
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - Z. Faruqui
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - Q. Ahmed
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
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Jamshed A, Hussain R, Rehman K, Iqbal H, Hameed S, Majeed U, Shah MA, Azhar R, Ahmed Q, Faruqui Z. Primary squamous cell carcinoma of the oral cavity at presentation in Pakistan. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e17002] [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: 11/20/2022] Open
Abstract
e17002 Background: Squamous cell carcinoma of oral cavity (SCCOC) is characterized by marked geographical differences in frequency and site distribution. Pakistan is situated within the high risk zone on the global oral cancer map. However, no reliable data exists on oral cancer in this area. Our aim was to determine clinicopathological features and patterns at presentation of primary SCCOC in a comprehensive cancer centre in Pakistan. Methods: Demographic, risk factors, pathological and AJCC staging data for SCCOC treated at Shaukat Khanum Memorial Hospital for the period November 2003-October 2008 were obtained from the head and neck unit database. Results: The database identified 666 patients with biopsy proven primary SCCOC. Mean age was 53 years (range 12 - 90 years). Male (428): Female (238) ratio was M64%:F36%. The occurrence of major risk factors for oral cancer specifically smoking, betel quid chewing, naswar (smokeless tobacco) and alcohol use in males (428) was 45% (193), 28% (118), 29% (126), 3% (13), and in females (238) was 8% (20), 29% (68), 13% (30), 0% (0), respectively. Thirty-eight percent (411/666) had no association with tobacco, betel quid or alcohol use. Subsite within oral cavity; anterior tongue 41.1% (274), buccal mucosa 26.6% (177), lower gingival and alveolus 19.5% (130), upper gingival and alveolus 4.1% (27), lips 3.6% (24), retromolar trigone 2.9% (19), hard palate 1.7% (11), and floor mouth 0.6 (4). Broder's/World Health Organization histological grade; grade I 52% (334), grade II 34% (226), grade III 7% (49), and unknown 5% (36). According to AJCC 2002 system 0.2% (1), 10.8% (72), 12.2% (81), 13.2% (88), and 63.7% (420) had stage 0, I, II, III, and IV, respectively. Conclusions: Approximately 80% of patients with primary SCCOC present with stage III or IV disease with anterior tongue as the most common subsite in our hospital. While tobacco and betel quid chewing can be attributed to development of SCCOC in a significant proportion of patients, nearly 38% are unlinked to typical risks factors suggesting other environmental and genetic agents as etiological factors in this region. No significant financial relationships to disclose.
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Affiliation(s)
- A. Jamshed
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - R. Hussain
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - K. Rehman
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - H. Iqbal
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - S. Hameed
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - U. Majeed
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - M. A. Shah
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - R. Azhar
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - Q. Ahmed
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
| | - Z. Faruqui
- Shaukat Khanum Memorial Cancer Hospital and RC, Lahore, Pakistan
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Rehman K, Monaghan A, Nishikawa H. P.119 The management of large scalp defect in cutis aplasia. J Craniomaxillofac Surg 2008. [DOI: 10.1016/s1010-5182(08)71907-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Hameed S, Jamshed A, Hussain R, Shah MA, Majeed U, Rehman K, Adeel M, Faruqui ZS, Syed AA, Ahmed Q. Neoadjuvant chemotherapy with concomitant hypofractionated accelerated radiotherapy in the treatment of advanced head and neck cancer. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.17021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Rehman K, Whear NM. Re: James GJ, Moore RJ, Perry MJ. Impregnation of antibiotic into porous high density polyethylene material (Medpor) using negative pressure. Br J Oral Maxillofac Surg 2006;44:556–7. Br J Oral Maxillofac Surg 2007; 45:514. [PMID: 17367900 DOI: 10.1016/j.bjoms.2007.01.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/29/2007] [Indexed: 11/16/2022]
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Syed AA, Jamshed A, Muhammad B, Azhar R, Yusuf MA, Khan YI, Ahmed Q, Shehzad K, Rehman K, Faruqui Z. Trimodality treatment (TMT) for locally advanced esophageal cancer in Pakistan; Analysis of prognostic factors influencing survival. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.15185] [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: 11/20/2022] Open
Abstract
15185 Background: The prognosis of patients with locally advanced esophageal cancer is poor. TMT for locally advanced esophageal cancer is being utilized with increasing frequency. In this study, we investigate the prognostic factors influencing survival in patients with locally advanced esophageal cancer following TMT. Methods: The study included 22 patients with esophageal carcinoma treated between January 2003 and December 2005 at Shaukat Khanum Memorial Hospital and Research Centre. Median age was 49 years (range 26 - 68). There were 15 (68%) males and 7 (32%) females. All patients had EGD with biopsy and CT chest. Twelve (54.5%) had squamous cell carcinoma and 10 (45.5%) patients had adenocarcinoma. Five patients (23%) had tumour in the middle third and 17 (77%) had lower/gastroesophageal lesions. Preoperative radiation consisted of 50.4 Gy / 28 fractions with concomitant chemotherapy day 1 and 29 (Cisplatin 75 mg/m2 day 1 and infusional 5FU 1000 mg/m2 day 1–5). Esophagectomy was done at 6 - 12 weeks following chemoradiation. The pathologic down-staging was evaluated by the 5-score tumor regression grade (TRG) of Mandard. Results: Post TMT pathologic TNM stage was; Stage 0 in 8 pts (36%), stage II in 5 pts (23%) and stage III in 9 pts (41%). 13 (59%) pts had R0 and 9 (41%) pts had R1 resection. The 4-year disease free survival was 29% with a median survival of 19 months. The number of patients with TRG score 1, 2, 3, 4 and 5 were 7 (32%), 4 (18%), 5 (23%), 2 (9%) and 4 (18%) respectively. Tumor regression grade 1–2 (p=.0016) and negative circumferential margins >2 mm (p=.0019) had a positive influence on DFS. Age (< 50 vs ≥ 50 years), sex, hemoglobin at presentation (≤ 12 vs > 12 gm/dl), tumor site (middle vs lower/GE junction), pathological nodal status (node positive vs node negative) and histological subtype (squamous cell vs adenocarcinoma) did not influence survival (p= 0.92, p= 0.82, p= 0.69, p= 0.79, p= 0.41 and p= 0.32 respectively). Conclusions: TMT results in prolonged disease free survival in patients with complete response or microscopic residual foci (TRG 1–2). Positive or circumferential margins <2mm is associated with poor prognosis. No significant financial relationships to disclose.
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Affiliation(s)
- A. A. Syed
- Shaukat Khanum Memorial Cancer Hospital and Resear, Lahore, Pakistan
| | - A. Jamshed
- Shaukat Khanum Memorial Cancer Hospital and Resear, Lahore, Pakistan
| | - B. Muhammad
- Shaukat Khanum Memorial Cancer Hospital and Resear, Lahore, Pakistan
| | - R. Azhar
- Shaukat Khanum Memorial Cancer Hospital and Resear, Lahore, Pakistan
| | - M. A. Yusuf
- Shaukat Khanum Memorial Cancer Hospital and Resear, Lahore, Pakistan
| | - Y. I. Khan
- Shaukat Khanum Memorial Cancer Hospital and Resear, Lahore, Pakistan
| | - Q. Ahmed
- Shaukat Khanum Memorial Cancer Hospital and Resear, Lahore, Pakistan
| | - K. Shehzad
- Shaukat Khanum Memorial Cancer Hospital and Resear, Lahore, Pakistan
| | - K. Rehman
- Shaukat Khanum Memorial Cancer Hospital and Resear, Lahore, Pakistan
| | - Z. Faruqui
- Shaukat Khanum Memorial Cancer Hospital and Resear, Lahore, Pakistan
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Jamshed A, Hussain R, Ahmed S, Rehman K, Shehzad K, Muhammad B, Hameed S, Shah MA, Azhar R, Faruqui Z. Cisplatin plus gemcitabine (GC) as induction chemotherapy in locally advanced head and neck cancer (HANC). J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.6073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
6073 Background: Cisplatin/infusional 5-fluorouracil chemotherapy is routinely administered as standard induction chemotherapy in advanced HANC. However, the optimum treatment remains to be defined. Gemcitabine is an active agent in HANC and few studies have evaluated induction GC in HANC. We have explored the activity and toxicity of GC as induction treatment in HANC and report the results. Methods: From August 2005 to September 2006, 55 patients with locally advanced HANC had induction chemotherapy with GC at Shaukat Khanum Memorial Cancer Hospital and Research Centre. We reviewed the medical records and prospectively collected data to determine activity and toxicity of induction GC. M:F ratio was 64%:36% with a median age of 50 years (range 19–80). All patients had histologically confirmed squamous cell carcinoma. The site of disease was nasopharynx, paranasal sinuses, oral cavity, oropharynx, larynx and hyopharynx in 4% (2), 11% (6), 51% (21), 2% (1), 11% (6) and 22% (11) respectively. According to AJCC staging 7% (4) had stage III and 93% (51) had stage IVa/IVb disease (T3N0 7%, T3N+ 2%, T4N0 38% and T4N+ 53%). Induction chemotherapy consisted of 2 cycles of cisplatin 75 mg/m2 day 1 and gemcitabine 1000 mg/m2 day 1 and 8 with treatment repeated three weekly. Fifty-three (94%) patients received 2 cycles as planned. Toxicity was scored after each cycle according to the NCI.CTC criteria. Response was assessed following completion of induction chemotherapy by clinical examination/MRI scan. Results: All patients were available for assessment of toxicity and response. A total of 111 cycles were delivered. The response rates are: complete 24% (13), partial 62% (34), no response 7% (4) and progression 7% (4). The overall response rate was 86% (complete 24%, partial 62%). No treatment related deaths occurred. Haematological G3/G4 toxicity included neutropenia (13%/7%) and thrombocytopenia (5%/0%). The non-haematological toxicity observed (nausea, vomiting and diarrhoea) was only G1/G2. Conclusions: GC is well tolerated with low toxicity and high anti tumour activity as neoadjuvant chemotherapy treatment in squamous cell head and neck cancer. Combination GC arm should be included in future trials. No significant financial relationships to disclose.
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Affiliation(s)
- A. Jamshed
- Shaukat Khanum Memorial Hospital and Research Cent, Lahore, Pakistan
| | - R. Hussain
- Shaukat Khanum Memorial Hospital and Research Cent, Lahore, Pakistan
| | - S. Ahmed
- Shaukat Khanum Memorial Hospital and Research Cent, Lahore, Pakistan
| | - K. Rehman
- Shaukat Khanum Memorial Hospital and Research Cent, Lahore, Pakistan
| | - K. Shehzad
- Shaukat Khanum Memorial Hospital and Research Cent, Lahore, Pakistan
| | - B. Muhammad
- Shaukat Khanum Memorial Hospital and Research Cent, Lahore, Pakistan
| | - S. Hameed
- Shaukat Khanum Memorial Hospital and Research Cent, Lahore, Pakistan
| | - M. A. Shah
- Shaukat Khanum Memorial Hospital and Research Cent, Lahore, Pakistan
| | - R. Azhar
- Shaukat Khanum Memorial Hospital and Research Cent, Lahore, Pakistan
| | - Z. Faruqui
- Shaukat Khanum Memorial Hospital and Research Cent, Lahore, Pakistan
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Bazarbashi S, El Weshi A, Khafaga Y, Rahal M, Rehman K, Memon M, Manji M, Ezzat A. Rectal cancer: Treatment results and prognostic factors. Single center experience with 186 non-metastatic resctable cases. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.3740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- S. Bazarbashi
- King Faisal Specialist Hosp & Research Ctr, Riyadh, Saudi Arabia
| | - A. El Weshi
- King Faisal Specialist Hosp & Research Ctr, Riyadh, Saudi Arabia
| | - Y. Khafaga
- King Faisal Specialist Hosp & Research Ctr, Riyadh, Saudi Arabia
| | - M. Rahal
- King Faisal Specialist Hosp & Research Ctr, Riyadh, Saudi Arabia
| | - K. Rehman
- King Faisal Specialist Hosp & Research Ctr, Riyadh, Saudi Arabia
| | - M. Memon
- King Faisal Specialist Hosp & Research Ctr, Riyadh, Saudi Arabia
| | - M. Manji
- King Faisal Specialist Hosp & Research Ctr, Riyadh, Saudi Arabia
| | - A. Ezzat
- King Faisal Specialist Hosp & Research Ctr, Riyadh, Saudi Arabia
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Bazarbashi S, Raja M, Kattan S, Rahal M, El-Weshi A, Pai C, Rehman K, Aslam M, Othman K, Hanash K. Preliminary results of phase II trial of concomitant administration of intra-vesical reduced dose Bacillus Calmette- Guerin (BCG) and interferon a 2B (IFN) in the prevention of recurrence of superficial bladder cancer. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.4716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- S. Bazarbashi
- King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia
| | - M. Raja
- King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia
| | - S. Kattan
- King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia
| | - M. Rahal
- King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia
| | - A. El-Weshi
- King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia
| | - C. Pai
- King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia
| | - K. Rehman
- King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia
| | - M. Aslam
- King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia
| | - K. Othman
- King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia
| | - K. Hanash
- King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia
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Abstract
OBJECTIVE To investigate the relationships between eruption status, gender, social class, grade of operator, anaesthetic modality and nerve damage during third molar surgery. DESIGN Two centre prospective longitudinal study. SETTING The department of oral and maxillofacial surgery, University Hospital Birmingham NHS Trust and oral surgery outpatient clinics at Birmingham Dental Hospital. SUBJECTS A total of 391 patients had surgical removal of lower third molars. Sensory disturbance was recorded at one week post operatively. Patients with altered sensation were followed up at one month, three months and six months following surgery. RESULTS 614 lower third molars in 391 patients were removed. Forty-six procedures (7.5%) were associated with altered sensation at one week with three procedures (0.49%) showing persistent symptoms at six months. Of these 46 nerve injuries, 26 (4.23%) involved the lingual nerve and 20 (3.25%) the inferior dental nerve (IDN). All three persistent sensations were IDN related. A logistic regression model found that the use ofa lingual retractor chi2 = 11.559, p = 0.003 was more significant than eruption status chi2 = 12.935, p = 0.007. There was no significant relationship between anaesthetic modality, age, social class, sex and seniority of operator. CONCLUSIONS There was no link between the choices of local or general anaesthesia and nerve damage during lower third molar removal when difficulty of surgery was taken into account.
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Abstract
OBJECTIVE The occurrence of trauma in older people is well-documented; however the incidence of maxillofacial trauma is scarcely reported. Therefore, the objective of this study is to determine the causes and consequences of maxillofacial trauma in older people. DESIGN A five-year (March 95 - March 2000) retrospective study was carried out of all patients over the age of 65 years with facial trauma presenting to Accident and Emergency Department (A&E). The information was collected using the medical notes and discharge summaries. SETTING The Departments of A&E and Maxillofacial Surgery. SUBJECTS A total of 42 patients' records were examined for study related data. RESULTS A total of 42 patients were seen during the study period. Thirty-six gave a history of a fall, of which 15 had tripped, 5 had slipped, 3 resulted from a Transient Ischaemic Attack (TIA), 1 as a result of alcohol abuse, in 1 a prosthetic knee gave way and 11 gave no cause for the fall. Of the remaining 6 patients, 5 were assaulted and 1 had a wardrobe fall on top of him. The majority of the falls occurred during the winter months. Maxillofacial injuries were noted in 27 of the 42 patients. Sixteen patients had cheekbone fractures, 8 mandibular fractures, 2 midface and 1 orbital complex fracture. Twenty-five percent of cheekbone fractures and 50% of mandibular fractures were treated surgically. Medical history was noted in 27 patients. CONCLUSIONS This study clearly demonstrates the majority of the facial trauma in the older people can be treated conservatively unless the patients complain of functional problems.
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Rehman K, Wingertzahn MA, Harper RG, Wapnir RA. Proabsorptive action of gum arabic: regulation of nitric oxide metabolism in the basolateral potassium channel of the small intestine. J Pediatr Gastroenterol Nutr 2001; 32:529-33. [PMID: 11429512 DOI: 10.1097/00005176-200105000-00008] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
BACKGROUND Gum arabic, a high-molecular-weight natural polysaccharide, has been shown to have proabsorptive properties in animal models of gastrointestinal disease that involve nitric oxide (NO). Gum arabic may indirectly regulate NO metabolism by creating an outward NO gradient, thus altering other intracellular NO-dependent mechanisms such as gating of the potassium (K+) channel. This hypothesis was further investigated using the K+ channel blocker, glybenclamide. METHODS Following intraperitoneal injection of 4.5 mg/kg glybenclamide or saline, the jejunum of anesthetized rats was perfused with a standard oral rehydration solution in the presence or absence of 2.5 g/L gum arabic, as well as 1 mmol/L l-arginine to enhance NO production. Sodium, net water, and glucose absorption and unidirectional water movement were determined. RESULTS Gum arabic showed regulatory capacity for NO-dependent metabolism by reducing net water absorption in the absence of arginine, and sodium absorption after arginine stimulation, in the absence of glybenclamide. Addition of gum arabic to oral rehydration solution, in glybenclamide pretreated animals, and in the absence of arginine, normalized sodium absorption, but was less effective in restoring net water transport. Injection of glybenclamide sharply decreased all absorption markers in arginine supplemented oral rehydration solution, which were at least partially restored by addition of gum arabic to the oral rehydration solution. In the presence of glybenclamide, the effects of arginine became antiabsorptive, as had those observed in preceding studies with high arginine concentration. Gum arabic partially or fully reversed alterations produced by perfused 1 mmol/L arginine. CONCLUSIONS Some of the effects of gum arabic on the small intestine are likely caused by its ability to remove NO as it diffuses into the lumen, thus reducing NO concentration in the enterocyte and indirectly affecting the absorptive/secretory response of the gut, which leads to normalization of absorptive function. These findings are consistent with the previously shown gum arabic-scavenging properties of NO and support a potential therapeutic role for this product.
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Affiliation(s)
- K Rehman
- Division of Perinatal Medicine, Department of Pediatrics, North Shore-Long Island Jewish Health System, 300 Community Drive, Manhasset, NY 11030, U.S.A
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Rehman K, Saunders WP, Foye RH, Sharkey SW. Calcium ion diffusion from calcium hydroxide-containing materials in endodontically-treated teeth: an in vitro study. Int Endod J 1996; 29:271-9. [PMID: 9206445 DOI: 10.1111/j.1365-2591.1996.tb01381.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [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: 02/04/2023]
Abstract
The aim of this in vitro study was to determine the amount and duration of diffusion of calcium ions from both a calcium hydroxide-containing root canal sealer and an intracanal medicament, through the apical foramen and the dentinal tubules of endodontically-treated teeth. The root canals of 88 freshly extracted single-rooted teeth were prepared using the modified double flared, balanced force technique with patency filing. The teeth were divided into four test groups of 20 teeth each and a control group of eight teeth. One group was dressed with a non-setting calcium hydroxide while the other was obturated using cold lateral condensation of gutta-percha with a calcium hydroxide-containing sealer. An artificial root defect was created in the apical third of the root of the teeth in the other two groups and the root canals were either dressed or obturated in the same way as the first two groups. All groups were incubated at 37 degrees C and were sampled for calcium diffusion after 1, 2 and 3 days and 1, 2, 3, 4 and 8 weeks. There was statistically significantly more calcium diffusion with the non-setting groups compared with the sealer groups (P < 0.05). There was more calcium ion diffusion from teeth with a patent apical foramen than those with an artificial resorptive root defect (P < 0.05).
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Affiliation(s)
- K Rehman
- University of Glasgow Dental School, UK
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Rehman K, Khan AA, Haider Z, Shahzad A, Iqbal J, Khan RU, Ahmad S, Siddiqui A, Syed SH. Prevalence of seromarkers of HBV and HCV in health care personnel and apparently healthy blood donors. J PAK MED ASSOC 1996; 46:152-4. [PMID: 8993043] [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: 02/03/2023]
Abstract
Ninety-five health care workers and 91 controls were screened for seromarkers of both HBV (HBsAg, HBeAg, Anti-HBc) and HCV (anti-HCV) by ELISA. The control group showed a much higher frequency of seromarkers for both the viruses. HBsAg was positive in 5% of study group (health care personnel) and 14% of controls. Anti-HBc as a marker of past HBV-exposure was positive in 28% of study group as compared to 36% of controls. Overall, 33% of study group and 48% of control showed one or the other marker of HBV Anti-HCV was positive in 4% of study group and 14% of controls. This study suggests that health care workers are not particularly a high risk group as compared to rest of the population.
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Affiliation(s)
- K Rehman
- Department of Medicine, Services Hospital, Lahore
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Haider Z, Khan AA, Rehman K, Janjua MI, Iqbal J, Chishti MA, Qayyum A, Hasnain S, Shahzad A. Sero-diagnosis for viral hepatitis in 93 patients admitted with acute hepatitis in three different teaching hospitals in Lahore. J PAK MED ASSOC 1994; 44:182-4. [PMID: 7996663] [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: 01/28/2023]
Abstract
Serodiagnosis was done in 93 patients admitted with acute viral hepatitis (AVH) to three teaching hospitals in Lahore. Five (5.4%) had hepatitis A, 39 (41.9%) hepatitis B (2 of these were anti delta positive) [see erratum notice], 44 (47.3%) probable hepatitis E and 3(3.2%) had HAV/HBV co-infection. Antibody to hepatitis C (anti HCV) was detected in 6 patients (6.4%); 2 with HBV and 4 with probable HEV infection. Excluding 39 patients with hepatitis B and 3 with HBV as part of co-infection, there was evidence of previous HBV infection in 39 out of the remaining 51 patients. In the subset of 6 children, 3 had hepatitis A and 3 hepatitis E. Of these, 5 had evidence of previous exposure to HBV and one was also positive for anti HCV. Our results are suggestive of a strong background of HBV infection raising concern about its chronic sequelae in the community.
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Affiliation(s)
- Z Haider
- Department of Gastroenterology, Shaikh Zayed Hospital, Lahore
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Rehman K, Yaqub M, Sheri AN. Human environmental control: lead levels in blood. J PAK MED ASSOC 1988; 38:220-1. [PMID: 3149314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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