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Arshia, Jabeen A, Faheem A, Khan KM, Shah S, Perveen S. Benzophenone Esters and Sulfonates: Synthesis and their Potential as Antiinflammatory Agents. Med Chem 2018; 15:162-174. [PMID: 30081790 DOI: 10.2174/1573406414666180806114825] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 07/24/2018] [Accepted: 08/03/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND Inflammation is a biological rejoinder of vascular tissues against destructive agents e.g. irritants, damaged cell or pathogens. During inflammation, respiratory burst occurs by activated phagocytes which help to destroy invading pathogens. Phagocytic cells such as neutrophils and macrophages are one of the major sources of reactive oxygen species (ROS) and nitric oxide (NO). Normally, the redox environment is maintained by various antioxidant defense systems, however, these reactive oxygen species may be destructive and can lead to various pathological conditions. METHODS Benzophenone esters and sulfonates (1-18) were synthesized through one pot synthesis by reacting 4-hydroxy benzophenone either different benzoyl chloride or sulfonyl chloride. These synthetic compounds were evaluated for their in vitro immunosuppressive potential on two parameters of innate immune response including inhibition of intracellular reactive oxygen species (ROS) and nitric oxide (NO). ROS were induced in polymorphonuclear leukocytes (PMNs) isolated from human whole blood by serum opsonized zymosan stimulation, whereas NO were produced in J774.2 cells by lipopolysachharides (LPS) stimulation. Moreover, cytotoxicity of compounds was also determined using NIH-3T3 fibroblast cells (ATCC, Manassas, USA) was evaluated by using the standard MTT colorimetric assay. RESULTS All compounds inhibited the production of ROS at various extent among which compounds 2, 5, 6, 8, 10, 13 and 16 were found to be the potent inhibitors of ROS with IC50 values ranging between (1.0 - 2.2 µg/mL) as compared to ibuprofen (IC50 = 2.5 ± 0.6 µg/mL) as the standard drug. Compounds 2, 7, 11, 13, 14 and 18 showed good inhibition of NO production with % inhibition values ranging between (63.6% - 76.7%) at concentration of 25 µg/mL as compared to NG-monomethyl-Larginine (L-NMMA 65.6 ± 1.1 µg/mL) as the standard. All other derivatives showed moderate to low level of inhibition on both tested parameters. Cytotoxicity activity also showed nontoxicity of synthetic compounds. Structures of all the synthetic compounds were confirmed through 1H-NMR, 13C-NMR, EI-MS and HREI-MS spectroscopic techniques. CONCLUSION Compounds 2 and 13 were found to be good dual antiinflammatory (ROS and NO) agent. However, compounds 5, 6, 8, 10 and 16 were found to be selectively active for ROS inhibitory studies. Compounds 7, 11, 14 and 18 were discriminatory active at NO inhibition assay. These initial findings of antiinflammatory activity concluded that these compounds might have the potential to develop a novel non-steroidal antiinflammatory drugs (NSAIDs), non-acidic antiinflammatory agent. Most active compounds 2, 5-8, 10, 13, 14 and 16 showed nontoxicity of synthetic compounds.
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Affiliation(s)
- Arshia
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Almas Jabeen
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi-75270, Pakistan
| | - Aisha Faheem
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi-75270, Pakistan
| | - Khalid M Khan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan.,Department of Clinical Pharmacy, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Shazia Shah
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Shahnaz Perveen
- PCSIR Laboratories Complex, Karachi, Shahrah-e-Dr. Salimuzzaman Siddiqui, Karachi-75280, Pakistan
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Zafar H, Iqbal S, Javaid S, Khan KM, Choudhary MI. Xanthine Oxidase Inhibitory and Molecular Docking Studies on Pyrimidones. Med Chem 2018; 14:524-535. [DOI: 10.2174/1573406413666171129224919] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 11/26/2017] [Accepted: 11/28/2017] [Indexed: 11/22/2022]
Affiliation(s)
- Humaira Zafar
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Sarosh Iqbal
- Department of Applied Chemistry, Govt. College University, Faisalabad, Faislabad-38000, Pakistan
| | - Sumaira Javaid
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Khalid M. Khan
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Muhammad I. Choudhary
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
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Kaufman SS, Zhong XS, Elsabbagh AM, Bailey D, Yazigi NA, Khan KM, Matsumoto CS. Fecal pancreatic elastase-1 in the evaluation of pancreatic function after pediatric intestinal transplantation. Pediatr Transplant 2018; 22:e13247. [PMID: 29927031 DOI: 10.1111/petr.13247] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/14/2018] [Indexed: 12/13/2022]
Abstract
Fat malabsorption is common after SBT. To identify whether anatomic variant transplants differ in occurrence of exocrine pancreatic insufficiency that could contribute to fat malabsorption, we measured FPE repeatedly in 54 recipients of a SBT, ages 6.2 to 320 months. FPE determination most distant from SBT was 6.1 years. Of the 54, 39% received an isolated intestinal graft (native pancreas only), 48% received an en bloc liver-intestinal-pancreas graft (native and graft pancreas), and 13% received a multivisceral graft (graft pancreas only). Initial FPE was normal (>200 μg/g) in 15 of the 54 at a median of 22 (11-61) days after SBT. Recipients of a liver-intestine-pancreas transplant were more likely to have normal FPE within 30 days after SBT than were isolated intestinal or multivisceral transplant recipients (47%, 19%, and 0%, respectively, P = .049). Of the remaining 39 patients, 34 eventually demonstrated a normal FPE at a median of 168 (31-943) days after SBT. Type of SBT did not influence the likelihood of achieving a normal FPE level or time when it occurred. Five (9%) patients failed to achieve normal FPE, including 3 who died within 2 years after SBT. In conclusion, possessing both graft and native pancreas as in transplantation of an en bloc liver-intestinal-pancreas graft facilitates early normalization of FPE that eventually occurs in most patients irrespective of transplant type. Failure to recover normal pancreatic function may be associated with severe post-transplant complications.
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Affiliation(s)
- Stuart S Kaufman
- MedStar Georgetown Transplant Institute, MedStar Georgetown University Hospital, Washington, DC, USA
| | - Xiaogang Simon Zhong
- Department of Biostatistics and Bioinformatics, Georgetown University, Washington, DC, USA
| | - Ahmed M Elsabbagh
- Gastroenterology Surgical Center, Department of Surgery, Mansoura University, Mansoura, Egypt
| | - Dominique Bailey
- Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Nada A Yazigi
- MedStar Georgetown Transplant Institute, MedStar Georgetown University Hospital, Washington, DC, USA
| | - Khalid M Khan
- MedStar Georgetown Transplant Institute, MedStar Georgetown University Hospital, Washington, DC, USA
| | - Cal S Matsumoto
- MedStar Georgetown Transplant Institute, MedStar Georgetown University Hospital, Washington, DC, USA
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Khan KM, Baidya R, Aryal A, Farmer JR, Valliant J. Neurological and mental health outcomes among conventional and organic farmers in Indiana, USA. Ann Agric Environ Med 2018; 25:244-249. [PMID: 29936818 DOI: 10.26444/aaem/75113] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
INTRODUCTION Every farming method, whether conventional or organic, has been associated with some sort of risky behaviors leading to health issues among farmers. Substantial evidence is not available in the literature to determine whether the magnitudes of health outcomes vary between conventional and organic farmers. The study investigated whether self-reported neurological and mental health symptoms differ between conventional and organic farmers living in Indiana, USA. MATERIAL AND METHODS A self-reported questionnaire survey collected information from 200 conventional and 157 organic farmers of Indiana on demographic characteristics, depression and neurological symptoms. Statistical analyses were conducted to observe the differences in self-reported symptoms by groups of farmers. RESULTS It was observed that the conventional farmers had significantly higher age-adjusted mean neurological symptom score (p<0.01) than the organic farmers. Regression models revealed positive and significant associations of conventional farming with total (β =1.34; p=0.02), sensory (β =0.83; p=0.001) and behavioural (β =0.09; p=0.03) symptoms after accounting for age, income, education and years in farming. Positive but non-significant associations were also observed in conventional farmers with cognitive and motor symptoms, and with all subscales of depression symptoms in the adjusted models. CONCLUSIONS The findings obtained suggest the importance of a larger study to further explain the difference in mental and neurological health effects in these two categories of farmers.
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Affiliation(s)
- Khalid M Khan
- Department of Environmental and Occupational Health, School of Public Health, Indiana University, Bloomington, Indiana, USA.
| | - Retushi Baidya
- Department of Epidemiology and Biostatistics, School of Public Health, Indiana University, Bloomington, Indiana, USA.
| | - Ashamsa Aryal
- Department of Environmental and Occupational Health, School of Public Health, Indiana University, Bloomington, Indiana, USA.
| | - James R Farmer
- Department of Recreation, Park and Tourism Studies, School of Public Health, Indiana University, Bloomington, Indiana, USA.
| | - Julia Valliant
- Vincent and Elinor Ostrom Workshop in Political Theory and Policy Analysis, Indiana University, Bloomington.
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Hawksworth JS, Desai CS, Khan KM, Kaufman SS, Yazigi N, Girlanda R, Kroemer A, Fishbein TM, Matsumoto CS. Visceral transplantation in patients with intestinal-failure associated liver disease: Evolving indications, graft selection, and outcomes. Am J Transplant 2018; 18:1312-1320. [PMID: 29498797 PMCID: PMC5992069 DOI: 10.1111/ajt.14715] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 12/11/2017] [Accepted: 02/04/2018] [Indexed: 01/25/2023]
Abstract
Intestinal failure (IF)-associated liver disease (IFALD) is widely recognized as a lethal complication of long-term parenteral nutrition. The pathophysiology of IFALD is poorly understood but appears to be multifactorial and related to the inflammatory state in the patient with IF. Visceral transplant for IFALD includes variants of intestine, liver, or combined liver-intestine allografts. Graft selection for an individual patient depends on the etiology of IF, abdominal and vascular anatomy, severity of IFALD, and potential for intestinal rehabilitation. The past decade has witnessed dramatic improvement in the management of IFALD, principally due to improved lipid emulsion formulations and the multidisciplinary care of the patient with IF. As the recognition and treatment of IFALD continue to improve, the requirement of liver-inclusive visceral grafts appears to be decreasing, representing a paradigm shift in the care of the patient with IF. This review highlights the current indications, graft selection, and outcomes of visceral transplantation for IFALD.
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Affiliation(s)
- Jason S. Hawksworth
- MedStar Georgetown University Hospital, MedStar Georgetown Transplant Institute, Washington, DC USA,Walter Reed National Military Medical Center, Department of Surgery, Organ Transplant Service, Bethesda, MD USA
| | - Chirag S. Desai
- University of North Carolina, Department of Surgery, Division of Abdominal Transplant, Chapel Hill, NC USA
| | - Khalid M. Khan
- MedStar Georgetown University Hospital, MedStar Georgetown Transplant Institute, Washington, DC USA
| | - Stuart S. Kaufman
- MedStar Georgetown University Hospital, MedStar Georgetown Transplant Institute, Washington, DC USA
| | - Nada Yazigi
- MedStar Georgetown University Hospital, MedStar Georgetown Transplant Institute, Washington, DC USA
| | - Raffaele Girlanda
- MedStar Georgetown University Hospital, MedStar Georgetown Transplant Institute, Washington, DC USA
| | - Alexander Kroemer
- MedStar Georgetown University Hospital, MedStar Georgetown Transplant Institute, Washington, DC USA
| | - Thomas M. Fishbein
- MedStar Georgetown University Hospital, MedStar Georgetown Transplant Institute, Washington, DC USA
| | - Cal S. Matsumoto
- MedStar Georgetown University Hospital, MedStar Georgetown Transplant Institute, Washington, DC USA
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Iqbal S, Shaikh NN, Khan KM, Naz S, Ul-Haq Z, Perveen S, Choudhary MI. 2-Oxo-1,2,3,4-tetrahydropyrimidines Ethyl Esters as Potent β- Glucuronidase Inhibitors: One-pot Synthesis, In vitro and In silico Studies. Med Chem 2018; 14:818-830. [PMID: 29793412 DOI: 10.2174/1573406414666180525105325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 04/20/2018] [Accepted: 04/29/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND Glucuronidation is essential for the metabolism and excretion of toxic substances. β-Glucuronidase enzyme slows down the process of glucuronidation, and thus plays an important role in the on-set of colorectal carcinoma, and many other diseases. Inhibition of β- glucuronidase activity is thus identified as an important approach for the treatment of several diseases. OBJECTIVE Current study was aimed to synthesize a library of 2-oxo-1,2,3,4-tetrahydropyrimidine and to evaluate their β-glucuronidase inhibitory activity, and their mode of enzyme inhibition. METHOD We synthesized a series of 2-oxo-1,2,3,4-tetrahydropyrimidines 1-25 by fusing urea, ethyl acetoacetate, and a variety of aldehydes using copper nitrate trihydrate as catalyst. All synthesized compounds were evaluated for their in vitro β-glucuronidase inhibitory activity. In addition, molecular docking studies were also performed by using MOE docking tools. RESULTS Eighteen compounds showed inhibitory activity better than the standard D-saccharic acid 1,4-lactone, a well known β-glucuronidase inhibitor (IC50 = 45.75 ± 2.16 µM). Compound 20 (IC50 = 1.36 ± 0.03 µM) showed an excellent inhibitory activity, thirty-five folds superior to the standard. Docking results highlighted the role of various chemical moieties at different positions on 2- oxo-1,2,3,4-tetrahydropyrimidine skeleton in enzyme inhibitory activity. CONCLUSION This study has identified a class of potent β-glucuronidase inhibitors with the potential to be investigated further.
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Affiliation(s)
- Sarosh Iqbal
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan.,Department of Applied Chemistry, Government College University Faisalabad-38000, Pakistan
| | - Nimra N Shaikh
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Khalid M Khan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan.,Department of Clinical Pharmacy, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 31441, Dammam, Saudi Arabia
| | - Sehrish Naz
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Zaheer Ul-Haq
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Shahnaz Perveen
- PCSIR Laboratories Complex Karachi, Shahrahe- Dr. Salimuzzaman Siddiqui, Karachi-75280, Pakistan
| | - Muhammad I Choudhary
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan.,Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah-214412, Saudi Arabia
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Yasir A, Ishtiaq S, Jahangir M, Ajaib M, Salar U, Khan KM. Biology-Oriented Synthesis (BIOS) of Piperine Derivatives and their Comparative Analgesic and Antiinflammatory Activities. Med Chem 2018. [DOI: 10.2174/1573406413666170623083810] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Ammar Yasir
- Department of Chemistry, GC University, Lahore, Pakistan
| | - Saiqa Ishtiaq
- Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | | | - Muhammad Ajaib
- Department of Botany (Bhimber Campus), Mirpur University of Science and Technology (MUST), Mirpur-10250 (AJK), Pakistan
| | - Uzma Salar
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Khalid M. Khan
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
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Rahman A, Khan KM, Rao MS. Exposure to low level of lead during preweaning period increases metallothionein-3 expression and dysregulates divalent cation levels in the brain of young rats. Neurotoxicology 2018; 65:135-143. [PMID: 29452138 DOI: 10.1016/j.neuro.2018.02.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 02/11/2018] [Accepted: 02/12/2018] [Indexed: 12/11/2022]
Abstract
Lead (Pb) is a neurotoxic heavy metal, but the mechanism of its neurotoxicity is not clearly understood. Expression of metallothioneins (MTs) is induced in response to heavy metal exposure as a protective mechanism against heavy metal toxicity. There are several isoforms of MTs (MT-1 to 4), of which MT-3 is the neuron specific isoform, which also has neurite growth inhibitory effects. Whereas, the induction of MT-1 and 2 in response to Pb has been reported, the effect of Pb on the expression of MT-3 in the brain has not been documented. This study aimed at investigating the effect of Pb exposure on the expression of MT-3 in the cerebrum and hippocampus. Wistar rat pups were exposed to Pb via their dams' drinking water (0.2% lead acetate in deionized water) from postnatal day (PND) 0 to 21 and directly via drinking water until PND30. Expression of MT-3 was measured by Western blot and quantitative RT-PCR. MT-3 localization was done by immunohistochemistry. Divalent metal ions were analysed by atomic absorption spectrophotometry. Levels of Pb in blood and cerebrum were significantly increased, while that of copper (Cu), zinc (Zn) and manganese (Mn) were significantly decreased in the Pb-exposed rats at both PND21 and PND30. MT-3 protein was significantly increased in the cerebrum (by 2.5-fold) and in hippocampus (1.4 to 3.2-fold) in both PND21 and PND30 Pb-exposed rats over controls. MT-3 gene expression also increased in the cerebrum (by 42%), and in the hippocampus (by 65% and 43% in the PND21 and PND30 rats, respectively), in the Pb-exposed rats over controls, but the increase was statistically significant (p < 0.05) only in the PND30 rats. Pb exposure significantly increased (p < 0.05) percentage of MT-3 immunoreactive cells in Cornu Ammonis and dentate gyrus regions in the PND21 rats, and in the Cornu Ammonis 1, dentate gyrus and cortex regions in the PND30 rats. Our data thus provide convincing evidence that exposure to low levels of Pb during preweaning period increases the expression of MT-3 in the brain of rats.
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Affiliation(s)
- Abdur Rahman
- Department of Food Science and Nutrition, College of Life Sciences, Kuwait University, Kuwait.
| | - Khalid M Khan
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
| | - Muddanna S Rao
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
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Elsabbagh AM, Hawksworth J, Khan KM, Yazigi N, Matsumoto CS, Fishbein TM. World's smallest combined en bloc liver-pancreas transplantation. Pediatr Transplant 2018; 22:10.1111/petr.13082. [PMID: 29139617 PMCID: PMC6433131 DOI: 10.1111/petr.13082] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/08/2017] [Indexed: 11/30/2022]
Abstract
We present a case of a 2-year-old child who underwent a combined en bloc liver and pancreas transplant following complications of WRS. WRS is characterized clinically through infantile insulin-dependent diabetes mellitus, neutropenia, recurrent infections, propensity for liver failure following viral infections, bone dysplasia, and developmental delay. Usually, death occurs from fulminant liver and concomitant kidney failure. Few cases with WRS are reported in the literature, mostly from consanguineous parents. To the best of our knowledge, combined en bloc liver and pancreas transplant has not been performed in small children.
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Affiliation(s)
- Ahmed M. Elsabbagh
- MedStar Georgetown Transplant Institute; Georgetown University Hospital; Washington DC USA
| | - Jason Hawksworth
- MedStar Georgetown Transplant Institute; Georgetown University Hospital; Washington DC USA
| | - Khalid M. Khan
- MedStar Georgetown Transplant Institute; Georgetown University Hospital; Washington DC USA
| | - Nada Yazigi
- MedStar Georgetown Transplant Institute; Georgetown University Hospital; Washington DC USA
| | - Cal S. Matsumoto
- MedStar Georgetown Transplant Institute; Georgetown University Hospital; Washington DC USA
| | - Thomas M. Fishbein
- MedStar Georgetown Transplant Institute; Georgetown University Hospital; Washington DC USA
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Yousuf S, Khan KM, Salar U, Jabeen A, Ahmed S, Muhammad MT, Faheem A, Perveen S. New Bis-Pyrazolones as Potential Leads for ROS Inhibition; Environment Friendly Green Synthesis, Structural Characterization, and In Vitro Studies. Med Chem 2018; 14:536-548. [PMID: 29332595 DOI: 10.2174/1573406414666180112122001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Revised: 11/09/2017] [Accepted: 01/08/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND Pyrazolones have identified as significant antioxidant agents and many marketed and clinically prescribed NSAIDs have pyrazolone ring as main scaffold. METHOD Keeping in consideration the antioxidant potential of pyrazolone scaffold, new bispyrazolones 3-30 were synthesized by a green and enviroment friendly reaction route, in which two equivalents of 1-(4-chlorophenyl)-3-methyl-1H-pyrazol-5-ol were treated with one equivalent of benzaldehyde derivatives without any catalyst. All compounds were structurally characterzied by 1H-NMR and FAB analysis. 13C-NMR of selected compounds was also recorded. All compounds gave satisfactory elemental analyses and found in good agreement with calculated values. RESULTS Synthetic bis-pyrazolones 3-30 were evaluated for their oxidative burst inhibitory effect of zymosan stimulated whole blood phagocytes by using luminol enhanced chemilluminescence technique. All molecules demonstrated the potent ROS inhibition activity in the range of IC50 = 1.2 ± 0.1-48.8 ± 3.9 µM as compared to the standard ibuprofen (IC50 = 54.2 ± 9.2 μM). The purity of active compounds was checked by HPLC. CONCLUSION This study has identified a number of non-acidic lead molecules for future research on ROS inhibitors.
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Affiliation(s)
- Sahar Yousuf
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Khalid M Khan
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan.,Department of Clinical Pharmacy, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 31441, Dammam, Saudi Arabia
| | - Uzma Salar
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Almas Jabeen
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Shakil Ahmed
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Munira T Muhammad
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Aisha Faheem
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Shahnaz Perveen
- PCSIR Laboratories Complex, Karachi, Shahrah-e-Dr. Salimuzzaman Siddiqui, Karachi-75280, Pakistan
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Salar U, Khan KM, Fakhri MI, Hussain S, Tauseef S, Ameer S, Wadood A, Khan H, Perveen S. 1,1'-Carbonyldiimidazole (CDI) Mediated Facile Synthesis, Structural Characterization, Antimicrobial Activity, and in-silico Studies of Coumarin- 3-carboxamide Derivatives. Med Chem 2018. [DOI: 10.2174/1573406413666170623083116] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Uzma Salar
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Khalid M. Khan
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Muhammad I. Fakhri
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Shafqat Hussain
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Saima Tauseef
- Department of Microbiology, Federal Urdu University of Arts, Sciences and Technology, Gulshan-e-Iqbal Campus, Karachi-75370, Pakistan
| | - Shagufta Ameer
- Department of Microbiology, Federal Urdu University of Arts, Sciences and Technology, Gulshan-e-Iqbal Campus, Karachi-75370, Pakistan
| | - Abdul Wadood
- Department of Biochemistry, Computational Medicinal Chemistry Laboratory, UCSS, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Huma Khan
- Department of Biochemistry, Computational Medicinal Chemistry Laboratory, UCSS, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Shahnaz Perveen
- PCSIR Laboratories Complex, Karachi, Shahrah-e-Dr. Salimuzzaman Siddiqui, Karachi-75280, Pakistan
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Bano B, Khan KM, Jabeen A, Hameed A, Faheem A, Taha M, Perveen S, Iqbal S. Aminoquinoline Schiff Bases as Non-Acidic, Non-Steroidal, Anti-Inflammatory Agents. ChemistrySelect 2017. [DOI: 10.1002/slct.201702200] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Bilquees Bano
- H. E. J. Research Institute of Chemistry; International Center for Chemical and Biological Sciences; University of Karachi; Karachi- 75270 Pakistan
| | - Khalid M. Khan
- H. E. J. Research Institute of Chemistry; International Center for Chemical and Biological Sciences; University of Karachi; Karachi- 75270 Pakistan
| | - Almas Jabeen
- Dr. Panjwani Center for Molecular Medicine and Drug Research; International Center for Chemical and Biological Sciences; University of Karachi; Karachi- 75270 Pakistan
| | - Abdul Hameed
- H. E. J. Research Institute of Chemistry; International Center for Chemical and Biological Sciences; University of Karachi; Karachi- 75270 Pakistan
| | - Aisha Faheem
- Dr. Panjwani Center for Molecular Medicine and Drug Research; International Center for Chemical and Biological Sciences; University of Karachi; Karachi- 75270 Pakistan
| | - Muhammad Taha
- Department of Clinical Pharmacy; Institute for Research and Medical Consultations (IRMC); Imam Abdulrahman Bin Faisal University; Dammam P.O. Box 31441 Saudi Arabia
| | - Shahnaz Perveen
- PCSIR Laboratories Complex; Karachi, Shahrah-e-Dr. Salimuzzaman Siddiqui Karachi-75280 Pakistan
| | - Sarosh Iqbal
- Department of Applied Chemistry; Government College University; Faisalabad-38000 Pakistan
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Abstract
BACKGROUND The inflammatory milieu in the liver as determined by histopathology is different in individual patients undergoing autologous islet cell transplantation. We hypothesized that inflammation related to fatty-liver adversely impacts islet survival. To test this hypothesis, we used a mouse model of fatty-liver to determine the outcome of syngeneic islet transplantation after chemical pancreatectomy. METHODS Mice (C57BL/6) were fed a high-fat-diet from 6 weeks of age until attaining a weight of ≥28 grams (6-8 weeks) to produce a fatty liver (histologically > 30% fat);steatosis was confirmed with lipidomic profile of liver tissue. Islets were infused via the intra-portal route in fatty-liver and control mice after streptozotocin induction of diabetes. Outcomes were assessed by the rate of euglycemia, liver histopathology, evaluation of liver inflammation by measuring tissue cytokines IL-1β and TNF-α by RT-PCR and CD31 expression by immunohistochemistry. RESULTS The difference in the euglycemic fraction between the normal liver group (90%, 9/10) and the fatty-liver group (37.5%, 3/8) was statistically significant at the 18th day post- transplant and was maintained to the end of the study (day 28) (p = 0.019, X2 = 5.51). Levels of TNF-α and IL-1β were elevated in fatty-liver mice (p = 0.042, p = 0.037). Compared to controls cytokine levels were elevated after islet cell transplantation and in transplanted fatty-liver mice as compared to either fatty- or islet transplant group alone (p = NS). A difference in the histochemical pattern of CD31 could not be determined. CONCLUSION Fatty-liver creates an inflammatory state which adversely affects the outcome of autologous islet cell transplantation.
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Affiliation(s)
- Chirag S. Desai
- Department of Surgery, University of North Carolina, Chapel Hill, NC, USA
- CONTACT Chirag S. Desai Department of Surgery, University of North Carolina4021 Burnett Womack Building, Campus Box 7211, Chapel Hill, NC 27599, USA
| | - Khalid M. Khan
- Medstar Georgetown Transplant Institute, Washington DC, USA
| | - Xiaobo Ma
- Islet Cell Laboratory, Medstar Georgetown University Hospital, Washington DC, USA
| | - Henghong Li
- Department of Medicine, Georgetown University Medical Center, Washington DC, USA
| | - Juan Wang
- Department of Medicine, Georgetown University Medical Center, Washington DC, USA
| | - Lijuan Fan
- Department of Medicine, Georgetown University Medical Center, Washington DC, USA
| | - Guoling Chen
- Islet Cell Laboratory, Medstar Georgetown University Hospital, Washington DC, USA
| | - Jill P. Smith
- Department of Medicine, Georgetown University Medical Center, Washington DC, USA
| | - Wanxing Cui
- Islet Cell Laboratory, Medstar Georgetown University Hospital, Washington DC, USA
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Khan HH, Schroeder L, Fitzpatrick MS, Kaufman SS, Yazigi NA, Yurasek GK, Steinhorn DM, Fishbein TM, Khan KM. Successful venoarterial extracorporeal membrane oxygenation for prolonged hepatopulmonary syndrome following pediatric liver transplantation: A case report and review of the literature. Pediatr Transplant 2017; 21. [PMID: 28833992 DOI: 10.1111/petr.13036] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/27/2017] [Indexed: 01/16/2023]
Abstract
HPS is a major complicating feature of end-stage liver disease. Diagnosis is clinical, and LT is the only definitive treatment. While the general impression is that HPS improves quickly after transplantation, it may not always be the case. We describe the smallest reported child with HPS prior to LT and requiring prolonged venoarterial extracorporeal membrane oxygenation after LT; especially as it is a rare occurrence, physician managing such cases should be aware of the circumstances under which HPS may require specific treatment.
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Affiliation(s)
- Hamza Hassan Khan
- Transplant Institute, Medstar Georgetown University Hospital, Washington, DC, USA
| | - Laura Schroeder
- Critical Care Medicine, Childrens National Medical Center, Washington, DC, USA
| | - Megha S Fitzpatrick
- Transplant Institute, Medstar Georgetown University Hospital, Washington, DC, USA
| | - Stuart S Kaufman
- Transplant Institute, Medstar Georgetown University Hospital, Washington, DC, USA
| | - Nada A Yazigi
- Transplant Institute, Medstar Georgetown University Hospital, Washington, DC, USA
| | - Gregory K Yurasek
- Critical Care Medicine, Childrens National Medical Center, Washington, DC, USA
| | - David M Steinhorn
- Critical Care Medicine, Childrens National Medical Center, Washington, DC, USA
| | - Thomas M Fishbein
- Transplant Institute, Medstar Georgetown University Hospital, Washington, DC, USA
| | - Khalid M Khan
- Transplant Institute, Medstar Georgetown University Hospital, Washington, DC, USA
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Hussain ASM, Renno WM, Sadek HL, Kayali NM, Al-Salem A, Rao MS, Khan KM. Monoamine oxidase-B inhibitor protects degenerating spinal neurons, enhances nerve regeneration and functional recovery in sciatic nerve crush injury model. Neuropharmacology 2017; 128:231-243. [PMID: 29054367 DOI: 10.1016/j.neuropharm.2017.10.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 07/03/2017] [Revised: 09/28/2017] [Accepted: 10/15/2017] [Indexed: 12/29/2022]
Abstract
Monoamine oxidase-B (MAOB), a flavin adenine dinucleotide (FAD), is an enzyme which catalyzes the oxidation of amines. MAOB is proposed to play a major role in the pathogenesis of neurodegeneration through the production of reactive oxygen species (ROS) and neurotoxins. The present study was designed to outline the effects of the MAOB inhibitor (MAOB-I) on neuroprotection of spinal neurons, regeneration of sciatic nerve fibers, and recovery of sensory-motor functions in the sciatic nerve crush injury model. Male Wistar rats (4-months-old) were assigned to i) Naïve (N), ii) Sham (S), iii) Sciatic nerve crush and treated with saline (CRUSH + SALINE) and iv) Sciatic nerve crush and treated with MAOB inhibitor (CRUSH + MAOB-I) groups (n = 10/group). In groups iii and iv, the crush injury was produced by crushing the sciatic nerve followed by treatment with saline or MAOB-I (Selegiline® 2.5 mg/kg) intraperitoneally for 10 days. Behavioral tests were conducted from week 1 to week 6. At the end of the study, sciatic nerve and lumbar spinal cord were examined by immunohistochemistry, light and electron microscopy. MAOB-I treatment showed significant improvement in sensory and motor functions compared to saline treatment (p < 0.05-0.001) in injured nerves. The morphological study showed a significantly increased number of nerve fibers in sciatic nerve distal to the site of injury (p < 0.05), with better myelination pattern in CRUSH + MAOB-I treated group compared to CRUSH + SALINE group. Spinal cord ventral horns showed a significant increase in the number of NeuN-immunoreactive neurons in the MAOB-I treated group compared to Saline treated group (p < 0.01). MAOB-I has a significant potential for protecting the degenerating spinal cord neurons and enhancing the regeneration of injured sciatic nerve fibers following crush injury.
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Affiliation(s)
| | - Waleed M Renno
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait.
| | - Hanaa L Sadek
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
| | - Noura M Kayali
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
| | - Aseel Al-Salem
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
| | - Muddanna S Rao
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
| | - Khalid M Khan
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
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Macri EM, Felson DT, Zhang Y, Guermazi A, Roemer FW, Crossley KM, Khan KM, Stefanik JJ. Patellofemoral morphology and alignment: reference values and dose-response patterns for the relation to MRI features of patellofemoral osteoarthritis. Osteoarthritis Cartilage 2017; 25. [PMID: 28648740 PMCID: PMC5605424 DOI: 10.1016/j.joca.2017.06.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVE We aimed to (1) determine reference values for trochlear morphology and patellofemoral (PF) alignment in adults without magnetic resonance imaging (MRI)-defined PF full thickness cartilage damage or knee pain; and (2) evaluate dose-response patterns for these measures with prevalent MRI-defined PF structural damage and/or knee pain. DESIGN The Framingham Community Cohort is a population-based sample of ambulatory adults aged ≥50 years. We evaluated six morphology and alignment measures using MRI (n = 985), and reported reference values (mean ± 2SD) in a subsample without MRI-defined PF full thickness cartilage damage or knee pain (n = 563). With restricted cubic spline Poisson regression, we evaluated dose-response patterns of each of the six measures with prevalent MRI-defined PF structural damage or joint pain. Our primary outcome was full thickness cartilage damage. RESULTS For dose-response curves, prevalence ratios (PR) increased monotonically for all measures except patellar tilt, which rose with both lateral and medial tilt. Associations were generally strongest in the lateral PF compartment. PR for the strongest predictors of full thickness cartilage damage reached clinical relevance (PR > 1.5) at sulcus angle (SA) ≥135.0°; patellar tilt angle at ≤1.0° and ≥15.0°; and bisect offset ≥57.0%. Lateral trochlear inclination (LTI) achieved PR > 1.5 at ≤23.0° for full thickness cartilage damage with pain. CONCLUSIONS SA, patellar tilt, and bisect offset were most strongly associated with full thickness cartilage damage. LTI, patellar tilt and bisect offset had stronger associations with the addition of pain. These findings contribute to better identifying a subset of patients who may benefit from mechanically based interventions.
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Affiliation(s)
- E M Macri
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, Canada; Department of Family Practice, University of British Columbia, Vancouver, Canada.
| | - D T Felson
- Clinical Epidemiology Research and Training Unit, School of Medicine, Boston University, Boston, USA; Division of Musculoskeletal & Dermatological Sciences, University of Manchester, Manchester, UK.
| | - Y Zhang
- Clinical Epidemiology Research and Training Unit, School of Medicine, Boston University, Boston, USA; Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Boston, USA.
| | - A Guermazi
- Quantitative Imaging Center, Department of Radiology, School of Medicine, Boston University, Boston, USA.
| | - F W Roemer
- Quantitative Imaging Center, Department of Radiology, School of Medicine, Boston University, Boston, USA; Department of Radiology, University of Erlangen-Nuremberg, Erlangen, Germany.
| | - K M Crossley
- College of Science Health and Engineering, School of Allied Health, La Trobe University, Melbourne, Australia.
| | - K M Khan
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, Canada; Department of Family Practice, University of British Columbia, Vancouver, Canada.
| | - J J Stefanik
- Clinical Epidemiology Research and Training Unit, School of Medicine, Boston University, Boston, USA; Department of Physical Therapy, Movement & Rehabilitation Sciences, Northeastern University Bouve College of Health Sciences, Boston, USA.
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Khan KM, Evans SS, Bielko SL, Rohlman DS. Efficacy of technology-based interventions to increase the use of hearing protections among adolescent farmworkers. Int J Audiol 2017; 57:124-134. [PMID: 28918682 DOI: 10.1080/14992027.2017.1374568] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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: 10/18/2022]
Abstract
OBJECTIVE Adolescent farmworkers are exposed to loud noise during farm activities. We present a prospective study that evaluated the efficacy of low-cost, technology-based intervention approaches in high schools to enhance the use of hearing protection among adolescent farmworkers. DESIGN Six high schools in Iowa that agreed to participate in the study were divided into three equal groups through cluster-randomisation with each group receiving one of the three formats of hearing protection intervention: (a) classroom training, (b) classroom training coupled with smartphone app training and (c) computer training. Participants completed baseline (pre-training) and six-week post-intervention surveys for assessing hearing protection knowledge, attitudes and behaviour. STUDY SAMPLE Seventy participants from six schools were initially enrolled but 50 completed both pre- and post-intervention surveys. RESULTS In most cases, all three groups showed significant improvement in hearing protection knowledge, attitude and frequency of use from pre- to post-intervention. However, changes between groups were statistically non-significant. CONCLUSIONS Although all three formats led to improvements on hearing protection knowledge, attitude and behaviour, the findings of the study, perhaps due to the small sample size, did not allow us to detect whether technology-based hearing protection interventions were more effective than the traditional face-to-face training for adolescent farmworkers.
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Affiliation(s)
- Khalid M Khan
- a Department of Environmental Health, School of Public Health , Indiana University , Bloomington , IN , USA and
| | - Sydney S Evans
- a Department of Environmental Health, School of Public Health , Indiana University , Bloomington , IN , USA and
| | - Sylvanna L Bielko
- a Department of Environmental Health, School of Public Health , Indiana University , Bloomington , IN , USA and
| | - Diane S Rohlman
- b Occupational and Environmental Health , College of Public Health, The University of Iowa , Iowa City , IA , USA
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Khan KM, Bielko SL, Barnes PA, Evans SS, Main ALK. Feasibility of a low-cost hearing screening in rural Indiana. BMC Public Health 2017; 17:715. [PMID: 28923033 PMCID: PMC5604500 DOI: 10.1186/s12889-017-4724-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 09/06/2017] [Indexed: 11/27/2022] Open
Abstract
Background Hearing loss remains a neglected public health issue in the rural and agricultural communities in the United States and therefore, promotion of a low-cost hearing screening may be important for these underserved populations. The major objectives of our study were to assess feasibility of a low-cost telephone-administered hearing test in rural Indiana and to identify the challenges, barriers and viable implementation strategies associated with this test. Also, we evaluated whether a focus group session could change the hearing health attitude of rural residents. Methods We recruited 126 adults from six rural Indiana counties who participated in study activities in the following order: 1) a pre-focus group demographic, knowledge and attitude survey, 2) a focus group for discussing the feasibility of a telephone-administered hearing screening, 3) a post focus group attitude survey and 4) hearing was screened using an audiometer and self-assessment scale. These activities generated both qualitative and quantitative data, which were subsequently analyzed. Results Hearing impairment was perceived as an important public health issue. Many participants expressed interests to try the low-cost National Hearing Test (NHT). However, participants recommended NHT to be facilitated by community organizations to provide access to landline phones. The focus group turned out to be an excellent awareness building activity producing significant improvement in hearing health attitudes. Comparison of self and audiometric evaluations indicated underestimation of hearing handicap in our rural study population. Conclusions The study results underscore the urgent need for an effective strategy to promote low-cost hearing screening in rural US communities.
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Affiliation(s)
- Khalid M Khan
- Department of Environmental and Occupational Health, School of Public Health, Indiana University, 1025 E Seventh Street, Room 025E, Bloomington, IN, 47405, USA.
| | - Sylvanna L Bielko
- Department of Environmental and Occupational Health, School of Public Health, Indiana University, 1025 E Seventh Street, Room 025E, Bloomington, IN, 47405, USA
| | - Priscilla A Barnes
- Department of Applied Health Science, School of Public Health, Indiana University, Bloomington, IN, USA
| | - Sydney S Evans
- Department of Environmental and Occupational Health, School of Public Health, Indiana University, 1025 E Seventh Street, Room 025E, Bloomington, IN, 47405, USA
| | - Anna L K Main
- Department of Speech and Hearing Sciences, College of Arts and Sciences, Indiana University, Bloomington, IN, USA
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Al-Harbi AN, Khan KM, Rahman A. Developmental Vitamin D Deficiency Affects Spatial Learning in Wistar Rats. J Nutr 2017; 147:1795-1805. [PMID: 28747485 DOI: 10.3945/jn.117.249953] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 03/31/2017] [Accepted: 06/26/2017] [Indexed: 11/14/2022] Open
Abstract
Background: Vitamin D deficiency is a global problem. Recent evidence suggests that vitamin D is involved in brain development and function. Vitamin D deficiency has been associated with poor cognitive function in adults, but the effect of developmental vitamin D deficiency (DVDD) on cognitive function and brain development in children has not been well established.Objective: We explored the effects of DVDD on cognitive functions and brain morphology of rat pups.Methods: Wistar rat pups born to control and vitamin D-deficient dams were divided into 4 groups: control (C), deficient during gestation (dG), deficient during lactation (dL), and deficient during gestation and lactation (dGL). Spatial learning and memory were assessed by the Morris water maze test at postnatal day (PND) 24 and PND 45. Cortical thickness at the level of the hippocampus was measured at PND 63, and synapses were counted in specified areas of the hippocampus at PND 32 and PND 63.Results: Repeated-measures ANOVA revealed that at PND 24, learning (escape latency) was impaired (by 42%) in the dGL group, whereas at PND 45, both the dL and the dGL groups showed learning impairment (by 47% and 45%, respectively) compared with their respective C groups (P < 0.05). Short-term or long-term memory was largely unaffected by DVDD either at PND 24 or PND 45. Compared with the C group, all the DVDD groups had fewer synapses in the molecular layer of the hippocampus (P < 0.001). The synapse number decreased by 54% in the dGL group at PND 33 and by 70% in the dL and dGL groups at PND 63. All the DVDD groups at PND 63 showed a reduced cortical thickness (by 22%) compared with the C group (P < 0.05).Conclusion: These results suggest that a combined prenatal and postnatal DVDD for ≥6 wk in rat pups affects learning but not memory.
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Affiliation(s)
- Anwar N Al-Harbi
- Department of Food Science and Nutrition, College of Life Sciences, and
| | - Khalid M Khan
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
| | - Abdur Rahman
- Department of Food Science and Nutrition, College of Life Sciences, and
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Renno WM, Benov L, Khan KM. Possible role of antioxidative capacity of (-)-epigallocatechin-3-gallate treatment in morphological and neurobehavioral recovery after sciatic nerve crush injury. J Neurosurg Spine 2017; 27:593-613. [PMID: 28777065 DOI: 10.3171/2016.10.spine16218] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [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: 12/17/2022]
Abstract
OBJECTIVE This study examined the capacity of the major polyphenolic green tea extract (-)-epigallocatechin-3-gallate (EGCG) to suppress oxidative stress and stimulate the recovery and prompt the regeneration of sciatic nerve after crush injury. METHODS Adult male Wistar rats were randomly assigned to one of 4 groups: 1) Naïve, 2) Sham (sham injury, surgical control group), 3) Crush (sciatic nerve crush injury treated with saline), and 4) Crush+EGCG (sciatic nerve crush injury treated with intraperitoneally administered EGCG, 50 mg/kg). All animals were tested for motor and sensory neurobehavioral parameters throughout the study. Sciatic nerve and spinal cord tissues were harvested and processed for morphometric and stereological analysis. For the biochemical assays, the time points were Day 1, Day 7, Day 14, and Day 28 after nerve injury. RESULTS After sciatic nerve crush injury, the EGCG-treated animals (Crush+EGCG group) showed significantly better recovery of foot position and toe spread and 50% greater improvement in motor recovery than the saline-treated animals (Crush group). The Crush+EGCG group displayed an early hopping response at the beginning of the 3rd week postinjury. Animals in the Crush+EGCG group also showed a significant reduction in mechanical allodynia and hyperalgesia latencies and significant improvement in recovery from nociception deficits in both heat withdrawal and tail flick withdrawal latencies compared with the Crush group. In both the Crush+EGCG and Crush groups, quantitative evaluation revealed significant morphological evidence of neuroregeneration according to the following parameters: mean cross-sectional area of axons, myelin thickness in the sciatic nerve (from Week 4 to Week 8), increase of myelin basic protein concentration and gene expression in both the injured sciatic nerve and spinal cord, and fiber diameter to axon diameter ratio and myelin thickness to axon diameter ratio at Week 2 after sciatic nerve injury. However, the axon area remained much smaller in both the Crush+EGCG and Crush groups compared with the Sham and Naïve groups. The number of axons per unit area was significantly decreased in the Crush+EGCG and Crush groups compared with controls. Sciatic nerve injury produced generalized oxidative stress manifested as a significant increase of isoprostanes in the urine and decrease of the total antioxidant capacity (TAC) of the blood from Day 7 until Day 14. EGCG-treated rats showed significantly less increase of isoprostanes than saline-treated animals and also showed full recovery of TAC levels by Day 14 after nerve injury. In spinal cord tissue analysis, EGCG-treated animals showed induced glutathione reductase and suppressed induction of heme oxygenase 1 gene expression compared with nontreated animals. CONCLUSIONS EGCG treatment suppressed the crush-induced production of isoprostanes and stimulated the recovery of the TAC and was associated with remarkable alleviation of motor and sensory impairment and significant histomorphological evidence of neuronal regeneration following sciatic nerve crush injury in rats. The findings of this study suggest that EGCG can be used as an adjunctive therapeutic remedy for nerve injury. However, further investigations are needed to establish the antioxidative mechanism involved in the regenerative process after nerve injury. Only upregulation of glutathione reductase supports the idea that EGCG is acting indirectly via induction of enzymes or transcription factors.
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Affiliation(s)
| | - Ludmil Benov
- Biochemistry, Faculty of Medicine, Kuwait University, Safat, Kuwait
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Affiliation(s)
- Chirag S Desai
- Department of Surgery, University of North Carolina, Chapel Hill
| | - Khalid M Khan
- Department of Pediatrics, Georgetown University Hospital, Washington, DC
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I. Siddiqui N, A. Versiani M, Jawaid K, Shafique M, Hameed A, Ambreen N, Karim A, M. Khan K. Synthesis, Spectroscopic Characterization and Antimicrobial Activities of Benzoxazolone Derivatives. Med Chem 2017. [DOI: 10.2174/1573406413666161205121652] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Kumar R, Hussain S, Khan KM, Perveen S, Yousuf S. Crystal structure and Hirshfeld surface analysis of 1-(4-chloro-phen-yl)-2-{[5-(4-chloro-phen-yl)-1,3,4-oxa-diazol-2-yl]sulfan-yl}ethanone. Acta Crystallogr E Crystallogr Commun 2017; 73:524-527. [PMID: 28435712 PMCID: PMC5382613 DOI: 10.1107/s2056989017003978] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 03/11/2017] [Indexed: 11/10/2022]
Abstract
In the title compound, C16H10Cl2N2O2S, the dihedral angles formed by the chloro-substituted benzene rings with the central oxa-diazole ring are 6.54 (9) and 6.94 (8)°. In the crystal, C-H⋯N hydrogen bonding links the mol-ecules into undulating ribbons running parallel to the b axis. Hirshfeld surface analysis indicates that the most important contributions for the crystal packing are the H⋯C (18%), H⋯H (17%), H⋯Cl (16.6%), H⋯O (10.4%), H⋯N (8.9%) and H⋯S (5.9%) inter-actions.
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Affiliation(s)
- Rajesh Kumar
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | | | - Khalid M Khan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | | | - Sammer Yousuf
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
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Bano H, Hussain S, Khan KM, Perveen S, Yousuf S. Crystal structure and Hirshfeld surface analysis of 1-(4-bromo-phen-yl)-2-{[5-(pyridin-3-yl)-1,3,4-oxa-diazol-2-yl]sulfan-yl}ethan-1-one. Acta Crystallogr E Crystallogr Commun 2017; 73:623-626. [PMID: 28435735 PMCID: PMC5382636 DOI: 10.1107/s2056989017004819] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Accepted: 03/28/2017] [Indexed: 11/30/2022]
Abstract
In the title compound, C15H10BrN3O2S, the dihedral angles between the 1,3,4-oxa-diazole ring and the 3-pyridinyl and bromo-benzene rings are 12.17 (15) and 18.74 (15)°, respectively. In the crystal, the mol-ecules are linked into [100] chains by way of C-H⋯O, C-H⋯N, C-H⋯S hydrogen bonds. The Hirshfeld surface analysis indicates that the most important contributions to the packing are H⋯H (19.5%), N⋯H (17.3%), C⋯H (15.5%), Br⋯H (11.7%), and O⋯H (11.0%) inter-actions.
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Affiliation(s)
- Huma Bano
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | | | - Khalid M. Khan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | | | - Sammer Yousuf
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, Sahrah-e-Dr. Salimuzzaman Siddiqui, Karachi-75280, Pakistan
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Jahan H, Choudhary MI, Shah Z, Khan KM, Rahman AU. Derivatives of 6-Nitrobenzimidazole Inhibit Fructose-Mediated Protein Glycation and Intracellular Reactive Oxygen Species Production. Med Chem 2017; 13:577-584. [PMID: 28215170 DOI: 10.2174/1573406413666170216150158] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 11/17/2016] [Revised: 02/07/2017] [Accepted: 02/09/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND Benzimidazoles are important pharmacophores in drug discovery, and currently its derivatives such as flubendazole, omeprazole, and astemizole are used for the treatment of anthelmintic, ulcerative, and histaminic diseases, respectively. OBJECTIVES The aim of the current study was to investigate the antiglycation activity of nitrobenzimidazole derivatives against fructose-mediated human serum albumin (HSA) glycation. The study was also aimed at investigating the effects of newly identified antiglycation inhibitors on AGEsinduced intracellular reactive oxygen species (ROS) production, and associated impaired proliferation of the hepatocytes. METHODS The present study focuses on the antiglycation activity of 6-nitrobenzimidazole derivatives 1-13 in in-vitro human serum albumin (HSA)- fructose model. These derivatives were also identified as non-toxic against 3T3 mouse fibroblast cell-line in MTT-based assay. The effect of the most promising derivative 5, 4-(6-nitro-1H-benzimidazol-2-yl)-1,2,3-benzenetriol, was studied in a dose dependent manner, co-incubated with fructose-derived AGEs (0- 200 μg/mL) on rat hepatocytes proliferation and associated intracellular generation of ROS via MTT-based assay and DCFHDA technique, respectively. RESULTS We found that derivative 5 ameliorates the elevated intracellular oxidative stress and associated diminished proliferation of the hepatocytes in response to AGEs. CONCLUSION In conclusion, we identified novel 6-nitrobenzimidazole derivatives as antiglycation agents through in-vitro, and cell-based models.
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Affiliation(s)
- Humera Jahan
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Muhammad I Choudhary
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Zarbad Shah
- Department of Chemistry, Bacha Khan University Charsadda, Khyber Pukhtoonkhwa, Pakistan
| | - Khalid M Khan
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Atta-Ur Rahman
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
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Zafar H, Saad SM, Perveen S, Arshia, Malik R, Khan A, Khan KM, Choudhary MI. 2-Arylquinazolin-4(3H)-ones: Inhibitory Activities Against Xanthine Oxidase. Med Chem 2017; 12:54-62. [PMID: 26256588 DOI: 10.2174/1573406410666150807111336] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 08/02/2015] [Accepted: 08/02/2015] [Indexed: 11/22/2022]
Abstract
2-Arylquinazolin-4(3H)-ones (1-25) were synthesized, and evaluated for their xanthine oxidase inhibitory activity. Significant to moderate activities were exhibited by the compounds 1-3, 7, 9, 13-15, 19-21, and 23 with IC50 between 2.80 - 28.13 µM as compared to the standard allopurinol (IC50 (IC50 = 2.01 ± 0.01 µM). Compounds 4-6, 8, 11-12, 16-18, 22, and 24 demonstrated a weak activity with IC50 values 44.60 - 112.60 µM. Nonetheless, compounds 10 and 25 did not show any activity. Amongst all derivatives, compound 2, containing a C-4´ dimethylamino group, was the most potent inhibitor of the enzyme with an IC50 value comparable to the standard. Kinetics studies on the most active compounds (2, 7, 9, 14, 15, 19, and 20) were conducted in order to determine their modes of inhibition and dissociation constants Ki. Some of the compounds of 2-arylquinazolin-4(3H)-one series were thus identified as potential leads for further studies towards the treatment of hyperuricemia and gout.
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Affiliation(s)
| | | | | | | | | | | | - Khalid M Khan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan.
| | - Muhammad I Choudhary
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan.
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Aftab MF, Afridi SK, Mughal UR, Karim A, Haleem DJ, Kabir N, Khan KM, Hafizur RM, Waraich RS. New isatin derivative inhibits neurodegeneration by restoring insulin signaling in brain. J Chem Neuroanat 2017; 81:1-9. [PMID: 28093241 DOI: 10.1016/j.jchemneu.2017.01.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 12/09/2016] [Accepted: 01/10/2017] [Indexed: 01/08/2023]
Abstract
Diabetes is associated with neurodegeneration. Glycation ensues in diabetes and glycated proteins cause insulin resistance in brain resulting in amyloid plaques and NFTs. Also glycation enhances gliosis by promoting neuroinflammation. Currently there is no therapy available to target neurodegenration in brain therefore, development of new therapy that offers neuroprotection is critical. The objective of this study was to evaluate mechanistic effect of isatin derivative URM-II-81, an anti-glycation agent for improvement of insulin action in brain and inhibition of neurodegenration. Methylglyoxal induced stress was inhibited by treatment with URM-II-81. Also, Ser473 and Ser9 phosphorylation of Akt and GSK-3β respectively were restored by URM-II-81. Effect of URM-II-81 on axonal integrity was studied by differentiating Neuro2A using retinoic acid. URM-II-81 restored axonal length in MGO treated cells. Its effects were also studied in high fat and low dose streptozotocin induced diabetic mice where it reduced RBG levels and inhibited glycative stress by reducing HbA1c. URM-II-81 treatment also showed inhibition of gliosis in hippocampus. Histological analysis showed reduced NFTs in CA3 hippocampal region and restoration of insulin signaling in hippocampii of diabetic mice. Our findings suggest that URM-II-81 can be developed as a new therapeutic agent for treatment of neurodegenration.
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Affiliation(s)
- Meha Fatima Aftab
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270 Pakistan
| | - Shabbir Khan Afridi
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270 Pakistan
| | - Uzma Rasool Mughal
- H.E.J Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270 Pakistan
| | - Aneela Karim
- H.E.J Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270 Pakistan
| | - Darakhshan Jabeen Haleem
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270 Pakistan
| | - Nurul Kabir
- University of Malaya, Institute of Biological Sciences, Kuala Lumpur 50603, Malaysia
| | - Khalid M Khan
- H.E.J Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270 Pakistan
| | - Rahman M Hafizur
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270 Pakistan
| | - Rizwana S Waraich
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270 Pakistan.
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78
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Bakken A, Targett S, Bere T, Eirale C, Farooq A, Tol JL, Whiteley R, Witvrouw E, Khan KM, Bahr R. Interseason variability of a functional movement test, the 9+ screening battery, in professional male football players. Br J Sports Med 2016; 51:1081-1086. [PMID: 27601450 DOI: 10.1136/bjsports-2016-096570] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/20/2016] [Indexed: 02/02/2023]
Abstract
BACKGROUND The Nine Plus screening battery test (9+) is a functional movement test intended to identify limitations in fundamental movement patterns predisposing athletes to injury. However, the interseason variability is unknown. AIM To examine the variability of the 9+ test between 2 consecutive seasons in professional male football players. METHODS Asymptomatic Qatar Star League players (n=220) completed the 9+ at the beginning of the 2013 and 2014 seasons. Time-loss injuries in training and matches were obtained from the Aspetar Injury and Illness Surveillance Program. No intervention was initiated between test occasions. RESULTS A significant increase in the mean total score of 1.6 points (95% CI 1.0 to 2.2, p<0.001) was found from season 1 (22.2±4.1 (SD)) to season 2 (23.8±3.3). The variability was large, as shown by an intraclass correlation coefficient (ICC) of 0.24 (95% CI 0.11 to 0.36) and a minimal detectable change (MDC) of 8.7 points. Of the 220 players, 136 (61.8%) suffered a time-loss injury between the 2 tests. There was an improvement in mean total scores in the injured (+2.0±0.4 (SE), p<0.001) group but not in the uninjured group (+0.9±0.5, p=0.089). The variability from season 1 to season 2 was large both in the injured (ICC 0.25, 0.09 to 0.40, MDC 8.3) and uninjured (ICC 0.24, 0.02 to 0.43, MDC 9.1) groups. CONCLUSIONS The 9+ demonstrated substantial intraindividual variability in the total score between 2 consecutive seasons, irrespective of injury. A change above 8 points is necessary to represent a real change in the 9+ test between seasons.
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Affiliation(s)
- A Bakken
- Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.,Oslo Sports Trauma Research Center, Norwegian School of Sport Sciences, Oslo, Norway
| | - S Targett
- Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - T Bere
- Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.,Oslo Sports Trauma Research Center, Norwegian School of Sport Sciences, Oslo, Norway
| | - C Eirale
- Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - A Farooq
- Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - J L Tol
- Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.,The Sports Physician Group, Department of Sports Medicine OLVG, Amsterdam, The Netherlands.,Academic Center of Evidence Based Sports Medicine, Academic Medical Center, Amsterdam, The Netherlands
| | - R Whiteley
- Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - E Witvrouw
- Faculty of Medicine and Health Sciences, Department of Rehabilitation Sciences and Physiotherapy, Ghent University, Ghent, Belgium
| | - K M Khan
- Center for Mobility and Hip Health, University of British Columbia, Vancouver, British Columbia, Canada
| | - R Bahr
- Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.,Oslo Sports Trauma Research Center, Norwegian School of Sport Sciences, Oslo, Norway
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Nafeesa K, Rehman AU, Abbasi MA, Khan KM, Ahmed I, Hassan S. Preliminary structure-activity relationship studies on some novel s-substituted aliphatic analogues of 5-{1-[(4- chlorophenyl) sulfonyl]-3-piperidinyl}-1, 3, 4-oxadiazol-2-yl sulfide. TROP J PHARM RES 2016. [DOI: 10.4314/tjpr.v15i7.22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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80
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Memon I, Khan KM, Siddiqui S, Perveen S, Ishaq M. Expression and Immunohistochemical Localisation of the Gβγ-activated and Calcineurin-Inhibited Adenylyl Cyclase Isoforms in Rat Articular Chondrocytes. J Coll Physicians Surg Pak 2016; 26:667-672. [PMID: 27539760] [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] [Received: 12/04/2014] [Accepted: 05/26/2016] [Indexed: 06/06/2023]
Abstract
OBJECTIVE To determine the expression and localisation of the Gβγ-activated adenylyl cyclase (AC) isoforms 2, 4, and 7 and calcineurin-inhibited AC isoform 9 in rat articular chondrocytes. STUDY DESIGN Experimental study. PLACE AND DURATION OF STUDY Jumma Research Laboratory and Histology Laboratory, The Aga Khan University, Karachi, from 2009 to 2011. METHODOLOGY Fresh slices of articular cartilage were taken from various synovial joints of rats of different age groups. The expression of AC isoforms was determined by RT-PCR and immunohistochemistry was performed to localise these isoforms in articular chondrocytes. Tissue sections were processed for immunostaining with respective antibodies. The color was developed by diaminobenzidine. RESULTS All the studied AC isoforms were found to be differentially expressed in different zones of the rat articular cartilage. Generally, expression of all AC isoforms studied increased with age. The expression of the AC isoforms through PCR was almost consistent with the localisation of these isoforms by immunohistochemistry. CONCLUSION These data add to the information about signalling cascades possibly involved in articular chondrocytes. Variable expression of AC isoforms 2, 4, 7, and 9 suggest a role for the signalling cascades regulated by the AC isoforms in articular chondrocytes.
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Affiliation(s)
- Ismail Memon
- Department of Basic Sciences, College of Science and Health Professions, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Kingdom of Saudi Arabia
| | - Khalid M Khan
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
| | - Sammer Siddiqui
- Department of Biological and Biomedical Sciences, The Aga Khan University, Karachi
| | - Siddiqa Perveen
- Department of Biological and Biomedical Sciences, The Aga Khan University, Karachi
| | - Muhammad Ishaq
- Department of Biochemistry, United Medical and Dental College, Korangi, Karachi
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81
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Desai CS, Khan KM, Cui W. Islet autotransplantation in a patient with hypercoagulable disorder. World J Transplant 2016; 6:437-441. [PMID: 27358790 PMCID: PMC4919749 DOI: 10.5500/wjt.v6.i2.437] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 03/22/2016] [Accepted: 04/22/2016] [Indexed: 02/05/2023] Open
Abstract
Total pancreatectomy and islet auto transplantation is a good option for chronic pancreatitis patients who suffer from significant pain, poor quality of life, and the potential of type 3C diabetes and pancreatic cancer. Portal vein thrombosis is the most feared complication of the surgery and chances are increased if the patient has a hypercoagulable disorder. We present a challenging case of islet auto transplantation from our institution. A 29-year-old woman with plasminogen activator inhibitor-4G/4G variant and a clinical history of venous thrombosis was successfully managed with a precise peri- and post-operative anticoagulation protocol. In this paper we discuss the anti-coagulation protocol for safely and successfully caring out islet transplantation and associated risks and benefits.
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82
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Davis JC, Dian L, Khan KM, Bryan S, Marra CA, Hsu CL, Jacova P, Chiu BK, Liu-Ambrose T. Cognitive status is a determinant of health resource utilization among individuals with a history of falls: a 12-month prospective cohort study. Osteoporos Int 2016; 27:943-951. [PMID: 26449355 PMCID: PMC4898957 DOI: 10.1007/s00198-015-3350-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 09/29/2015] [Indexed: 01/23/2023]
Abstract
SUMMARY Falls are a costly public health problem worldwide. The literature is devoid of prospective data that identifies factors among fallers that significantly drive health care resource utilization. We found that cognitive function--specifically, executive functions--and cognitive status are significant determinants of health resource utilization among older fallers. INTRODUCTION Although falls are costly, there are no prospective data examining factors among fallers that drive health care resource utilization. We identified key determinants of health resource utilization (HRU) at 6 and 12 months among older adults with a history of falls. Specifically, with the increasing recognition that cognitive impairment is associated with increased falls risk, we investigated cognition as a potential driver of health resource utilization. METHODS This 12-month prospective cohort study at the Vancouver Falls Prevention Clinic (n = 319) included participants with a history of at least one fall in the previous 12 months. Based on their cognitive status, participants were divided into two groups: (1) no mild cognitive impairment (MCI) and (2) MCI. We constructed two linear regression models with HRU at 6 and 12 months as the dependent variables for each model, respectively. Predictors relating to mobility, global cognition, executive functions, and cognitive status (MCI versus no MCI) were examined. Age, sex, comorbidities, depression status, and activities of daily living were included regardless of statistical significance. RESULTS Global cognition, comorbidities, working memory, and cognitive status (MCI versus no MCI ascertained using the Montreal Cognitive Assessment (MoCA)) were significant determinants of total HRU at 6 months. The number of medical comorbidities and global cognition were significant determinants of total HRU at 12 months. CONCLUSION MCI status was a determinant of HRU at 6 months among older adults with a history of falls. As such, efforts to minimize health care resource use related to falls, it is important to tailor future interventions to be effective for people with MCI who fall. TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT01022866.
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Affiliation(s)
- J C Davis
- Center for Hip Health and Mobility, Robert HN Ho Research Centre 2635 Laurel St, Vancouver, BC, V5Z 1M9, Canada
- Aging, Mobility, and Cognitive Neuroscience Lab, Department of Physical Therapy, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC, V6T 2B5, Canada
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC, V6T 2B5, Canada
| | - L Dian
- Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - K M Khan
- Center for Hip Health and Mobility, Robert HN Ho Research Centre 2635 Laurel St, Vancouver, BC, V5Z 1M9, Canada
| | - S Bryan
- Centre for Clinical Epidemiology and Evaluation, University of British Columbia & VCHRI, 828 West 10th Avenue, Vancouver, BC, V6T 2B5, Canada
| | - C A Marra
- School of Pharmacy, Memorial University, St. John's, NF, Canada
| | - C L Hsu
- Center for Hip Health and Mobility, Robert HN Ho Research Centre 2635 Laurel St, Vancouver, BC, V5Z 1M9, Canada
- Aging, Mobility, and Cognitive Neuroscience Lab, Department of Physical Therapy, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC, V6T 2B5, Canada
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC, V6T 2B5, Canada
| | - P Jacova
- Center for Hip Health and Mobility, Robert HN Ho Research Centre 2635 Laurel St, Vancouver, BC, V5Z 1M9, Canada
- Aging, Mobility, and Cognitive Neuroscience Lab, Department of Physical Therapy, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC, V6T 2B5, Canada
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC, V6T 2B5, Canada
| | - B K Chiu
- Center for Hip Health and Mobility, Robert HN Ho Research Centre 2635 Laurel St, Vancouver, BC, V5Z 1M9, Canada
- Aging, Mobility, and Cognitive Neuroscience Lab, Department of Physical Therapy, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC, V6T 2B5, Canada
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC, V6T 2B5, Canada
| | - T Liu-Ambrose
- Center for Hip Health and Mobility, Robert HN Ho Research Centre 2635 Laurel St, Vancouver, BC, V5Z 1M9, Canada.
- Aging, Mobility, and Cognitive Neuroscience Lab, Department of Physical Therapy, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC, V6T 2B5, Canada.
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC, V6T 2B5, Canada.
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T. Muhammad M, M. Khan K, Taha M, Khan T, Hussain S, I. Fakhri M, Perveen S, Voelter W. New Facile, Eco-Friendly and Rapid Synthesis of Trisubstituted Alkenes Using Bismuth Nitrate as Lewis Acid. LETT ORG CHEM 2016. [DOI: 10.2174/1570178613666160109005421] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Mabood F, Hussain Z, Haq H, Arian MB, Boqué R, Khan KM, Hussain K, Jabeen F, Hussain J, Ahmed M, Alharasi A, Naureen Z, Hussain H, Khan A, Perveen S. Development of new UV-vis spectroscopic microwave-assisted method for determination of glucose in pharmaceutical samples. Spectrochim Acta A Mol Biomol Spectrosc 2016; 153:212-215. [PMID: 26312738 DOI: 10.1016/j.saa.2015.08.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [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: 06/15/2015] [Revised: 08/09/2015] [Accepted: 08/16/2015] [Indexed: 06/04/2023]
Abstract
A new UV-Visible spectroscopic method assisted with microwave for the determination of glucose in pharmaceutical formulations was developed. In this study glucose solutions were oxidized by ammonium molybdate in the presence of microwave energy and reacted with aniline to produce a colored solution. Optimum conditions of the reaction including wavelength, temperature, and pH of the medium and relative concentration ratio of the reactants were investigated. It was found that the optimal wavelength for the reaction is 610 nm, the optimal reaction time is 80s, the optimal reaction temperature is 160°C, the optimal reaction pH is 4, and the optimal concentration ratio aniline/ammonium molybdate solution was found to be 1:1. The limits of detection and quantification of the method are 0.82 and 2.75 ppm for glucose solution, respectively. The use of microwaves improved the speed of the method while the use of aniline improved the sensitivity of the method by shifting the wavelength.
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Affiliation(s)
- Fazal Mabood
- Department of Biological Sciences & Chemistry, College of Arts and Sciences, University of Nizwa, Oman.
| | - Z Hussain
- Department of Chemistry, Abdul Wali Khan University, KPK, Pakistan.
| | - H Haq
- Department of Chemistry, Abdul Wali Khan University, KPK, Pakistan
| | - M B Arian
- Department of Chemistry, Abdul Wali Khan University, KPK, Pakistan
| | - R Boqué
- Department of Analytical Chemistry and Organic Chemistry, Universitat Rovira i Virgili, Tarragona, Spain
| | - K M Khan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - K Hussain
- Department of Chemistry, Abdul Wali Khan University, KPK, Pakistan
| | - F Jabeen
- Department of Chemistry, University of Malakand, KPK, Pakistan
| | - J Hussain
- Department of Biological Sciences & Chemistry, College of Arts and Sciences, University of Nizwa, Oman
| | - M Ahmed
- Department of Chemistry, University of Malakand, KPK, Pakistan
| | - A Alharasi
- Department of Biological Sciences & Chemistry, College of Arts and Sciences, University of Nizwa, Oman
| | - Z Naureen
- Department of Biological Sciences & Chemistry, College of Arts and Sciences, University of Nizwa, Oman
| | - H Hussain
- Department of Biological Sciences & Chemistry, College of Arts and Sciences, University of Nizwa, Oman
| | - A Khan
- Department of Chemistry, UNICAMP, Brazil
| | - S Perveen
- PCSIR Laboratories Complex, Karachi, Shahrah-e-Dr. Salimuzzaman Siddiqui, Karachi 75280, Pakistan
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85
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Ur-Rehman A, Gul S, Abbasi MA, Nafeesa K, Akhtar MN, Khan KM, Ahmad I, Afzal S. Synthesis and Evaluation of some New 5-Substituted-1,3,4- oxadiazol-2yl-4-(morpholin-4yl Sulfonyl)benzyl Sulfides as Antibacterial Agent. TROP J PHARM RES 2015. [DOI: 10.4314/tjpr.v14i11.14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Mountjoy M, Junge A, Alonso JM, Clarsen B, Pluim BM, Shrier I, van den Hoogenband C, Marks S, Gerrard D, Heyns P, Kaneoka K, Dijkstra HP, Khan KM. Consensus statement on the methodology of injury and illness surveillance in FINA (aquatic sports): Table 1. Br J Sports Med 2015; 50:590-6. [DOI: 10.1136/bjsports-2015-095686] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/19/2015] [Indexed: 11/03/2022]
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Renno WM, Khan KM, Benov L. Is there a role for neurotrophic factors and their receptors in augmenting the neuroprotective effect of (-)-epigallocatechin-3-gallate treatment of sciatic nerve crush injury? Neuropharmacology 2015; 102:1-20. [PMID: 26514400 DOI: 10.1016/j.neuropharm.2015.10.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [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: 06/09/2015] [Revised: 10/01/2015] [Accepted: 10/23/2015] [Indexed: 12/17/2022]
Abstract
This study analyzed and compared the effects of EGCG treatment on the expression of NTFs and NTF receptors expression in the sciatic nerve and the L3-L6 spinal cord segments at the early phase of regeneration following sciatic nerve crush injury. Analysis of BDNF, GDNF and NT3 neurotropic factors and Trk-B, Trk-C and NGFR-p75 receptors in neurons in the spinal cord of CRUSH and CRUSH + EGGC rats showed significant (p < 0.0001) decrease compared to NAÏVE and SHAM at day 1, 3, 7 and 14 after nerve injury. EGCG treatment significantly (p < 0.0001) increased the BDNF, GDN, NT3, Trk-B, Trk-C and NGFR-p75 immunostaining in the L3-L6 spinal cord compared to CRUSH animals. Also, EGCG treatment significantly increased the Trk-B protein concentration and Trk-B, NT3 and Trk-C gene expression in the spinal cords compared to CRUSH group. However, at day 1 and 3 post nerve injury, EGCG treatment significantly decreased the NGFR-p75 expression compared to CRUSH rats. In the sciatic nerve, EGCG treatment significantly (p < 0.01) increased the Trk-B and NGFR-p75 protein concentration in the controls. EGCG treatment significantly (p < 0.0001) increased the Trk-B, Trk-C and NGFR-p75 mRNA gene expressions in the sciatic nerves compared to CRUSH group. Only at day 1, CRUSH + EGCG animals displayed significant rise in the sciatic nerves NT3 gene expression compared to CRUSH group. Our data suggest that the EGCG neuroprotective effect on the spinal cord neurons may be mediated through the modulation of NTFs and NTF receptors following nerve crush injury in a rat model.
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Affiliation(s)
- Waleed M Renno
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait.
| | - Khalid M Khan
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait
| | - Ludmil Benov
- Department of Biochemistry, Faculty of Medicine, Kuwait University, Kuwait
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Rahim F, Javed MT, Ullah H, Wadood A, Taha M, Ashraf M, Qurat-ul-Ain, Khan MA, Khan F, Mirza S, Khan KM. Synthesis, molecular docking, acetylcholinesterase and butyrylcholinesterase inhibitory potential of thiazole analogs as new inhibitors for Alzheimer disease. Bioorg Chem 2015; 62:106-16. [DOI: 10.1016/j.bioorg.2015.08.002] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Revised: 08/12/2015] [Accepted: 08/16/2015] [Indexed: 01/07/2023]
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89
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Abstract
BACKGROUND We compared the variability of bone age (BA) rating between clinicians and an automated system in children with congenital adrenal hyperplasia (CAH). METHOD A total of 126 radiographs assessed by 3 clinicians blinded to patient details using Greulich and Pyle (GP) (readers 1, 2, and 3) and BoneXpert (BX). RESULTS Comparing BA rating with each other, the mean of the absolute differences varied from 0.42 ± 0.53 years (reader 1 and BX) to 0.57 ± 0.58 years (reader 2 and reader 3), P = .368. Comparing ratings that were consistent with all 4 methods (within 1 year of each other, 93/126, 74%) and the remaining, "outliers" (33/126, 26%), the outliers were younger (P = .003), smaller (height, P = .011, weight, P = .000), and prepubertal (P = .001). CONCLUSION The variability of BA rating in CAH children is similar whether performed by clinicians or an automated system. The greatest variability was in prepubertal children.
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Affiliation(s)
- Khalid M Khan
- MedStar Georgetown University Hospital, Washington, DC, USA
| | | | - Tara Holm
- University of Minnesota, Minneapolis, MN, USA
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90
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Desai CS, Sharma S, Gruessner A, Fishbein T, Kaufman S, Khan KM. Effect of small donor weight and donor-recipient weight ratio on the outcome of liver transplantation in children. Pediatr Transplant 2015; 19:366-70. [PMID: 25819141 DOI: 10.1111/petr.12459] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/27/2015] [Indexed: 12/29/2022]
Abstract
A small donor weight is a risk factor for HAT with potential for graft loss. To test this hypothesis, we evaluated outcomes of pediatric liver transplants utilizing donors <20 kg using the UNOS database from 01/2003 to 01/2012 (n = 1311). All isolated liver transplants with whole organ grafts were included. Recipients were divided into four groups based on donor weight: group 1, donor weight <5 kg (n = 34 [2%]); group 2, 5-10 kg (431 [33%]); group 3, 10-15 kg (560 [43%]); and group 4, 15-20 kg (286 [22%]). Actuarial patient survival for the first year post-transplant was significantly lower in groups 1 and 2 compared to groups 3 and 4 (p = 0.002), similarly the one-yr graft function (p < 0.0001). The difference was due to graft loss within the first month for groups 1 and 2. HAT was significantly higher in groups 1 and 2 compared to others (p = 0.0006). Logistic regression analysis demonstrated donor weight as the most predictive factor with analysis of the ROC curve showing a cutoff point at 7.8 kg. The donor-recipient weight ratio did, in none of the models, gain statistical significance.
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Affiliation(s)
- Chirag S Desai
- Medstar Georgetown Transplant Institute, Georgetown University Hospital, Washington, DC, USA
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91
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Hameed A, Zehra ST, Shah SJA, Khan KM, Alharthy RD, Furtmann N, Bajorath J, Tahir MN, Iqbal J. Syntheses, Cholinesterases Inhibition, and Molecular Docking Studies of Pyrido[2,3-b
]pyrazine Derivatives. Chem Biol Drug Des 2015; 86:1115-20. [DOI: 10.1111/cbdd.12579] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Revised: 04/17/2015] [Accepted: 04/27/2015] [Indexed: 12/21/2022]
Affiliation(s)
- Abdul Hameed
- H. E. J. Research Institute of Chemistry; International Center for Chemical and Biological Sciences; University of Karachi; Karachi 75270 Pakistan
| | - Syeda T. Zehra
- H. E. J. Research Institute of Chemistry; International Center for Chemical and Biological Sciences; University of Karachi; Karachi 75270 Pakistan
| | - Syed J. A. Shah
- Centre for Advanced Drug Research; COMSATS Institute of Information Technology; Abbottabad 22060 Pakistan
| | - Khalid M. Khan
- H. E. J. Research Institute of Chemistry; International Center for Chemical and Biological Sciences; University of Karachi; Karachi 75270 Pakistan
| | - Rima D. Alharthy
- Department of Chemistry; King Abdulaziz University; Jeddah Saudi Arabia
| | - Norbert Furtmann
- Department of Life Science Informatics, B-IT, LIMES Program Unit Chemical Biology and Medicinal Chemistry; Rheinische Friedrich-Wilhelms-Universität; Dahlmann Str. 2 D-53113 Bonn Germany
- Pharmaceutical Institute; University of Bonn; An der Immenburg 4 D-53121 Bonn Germany
| | - Jürgen Bajorath
- Department of Life Science Informatics, B-IT, LIMES Program Unit Chemical Biology and Medicinal Chemistry; Rheinische Friedrich-Wilhelms-Universität; Dahlmann Str. 2 D-53113 Bonn Germany
| | | | - Jamshed Iqbal
- Centre for Advanced Drug Research; COMSATS Institute of Information Technology; Abbottabad 22060 Pakistan
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92
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Shamshad B, Jamal RA, Ashiq U, Mahrooof-Tahir M, Shaikh Z, Sultan S, Khan KM. Studies on chemistry, spectroscopy and antioxidant activities of chromium(III)-hydrazide complexes. Med Chem 2015; 11:798-806. [PMID: 25827721 DOI: 10.2174/1573406411666150401103442] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Accepted: 03/27/2015] [Indexed: 11/22/2022]
Abstract
Acid hydrazides are vital chemical entities due to their biological activities. Upon complexation with certain metal ions, their biological activities are known to be positively enhanced. The present work describes the synthesis of Cr(III)-hydrazide complexes, and their structural, spectroscopic and antioxidant properties to reveal their chemistry and biochemistry. Physical (magnetic moment, conductivity measurements), analytical (C, H, N and Cr analysis) and spectral (EI-Mass, FTIR) techniques are used for the characterization of synthesized compounds. All Cr(III)-hydrazide complexes exhibit octahedral geometry with general formula [Cr(L)2(H2O)2]Cl3. In these complexes, the hydrazide ligands are coordinated via carbonyl oxygen and terminal amino nitrogen in a bidentate fashion. All Cr(III)-hydrazide complexes were screened for in vitro diphenyldipicryl hydrazine (DPPH), superoxide dismutase and nitric oxide radical scavenging activities. Majority of the Cr(III)-hydrazide complexes were found to be more potent scavengers than their uncoordinated hydrazide ligands. This study demonstrates an interesting structure-activity relationship (SAR) which is presented here.
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Affiliation(s)
| | - Rifat A Jamal
- Department of Chemistry, University of Karachi, Karachi-75270, Pakistan.
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93
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Abbasi MA, Najm S, Rehman A, Rasool S, Khan KM, Ashraf M, Nasar R, Alam U. Evaluation of Sulfonamide Derivatives of Dagenan Chloride as Lipoxygenase and α-Glucosidase Inhibitors. TROP J PHARM RES 2015. [DOI: 10.4314/tjpr.v14i1.8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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94
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Siddiqa A, Rehman A, Abbasi MA, Rasool S, Khan KM, Ahmad I, Afzal S. Synthesis and antibacterial evaluation of 2-(1,3- Benzodioxol-5-ylcarbonyl)arylsulfonohydrazide derivatives. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i10.17] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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95
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Khan KM, Desai CS, Mete M, Desale S, Girlanda R, Hawksworth J, Matsumoto C, Kaufman S, Fishbein T. Developing trends in the intestinal transplant waitlist. Am J Transplant 2014; 14:2830-7. [PMID: 25395218 DOI: 10.1111/ajt.12919] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 06/25/2014] [Accepted: 07/01/2014] [Indexed: 01/25/2023]
Abstract
The United Network for Organ Sharing database was examined for trends in the intestinal transplant (ITx) waitlist from 1993 to 2012, dividing into listings for isolated ITx versus liver-intestine transplant (L-ITx). Registrants added to the waitlist increased from 59/year in 1993 to 317/year in 2006, then declined to 124/year in 2012; Spline modeling showed a significant change in the trend in 2006, p < 0.001. The largest group of registrants, <1 year of age, determined the trend for the entire population; other pediatric age groups remained stable, adult registrants increased until 2012. The largest proportion of new registrants were for L-ITx, compared to isolated ITx; the change in the trend in 2006 for L-ITx was highly significant, p < 0.001, but not isolated ITx, p = 0.270. New registrants for L-ITx, <1 year of age, had the greatest increase and decrease. New registrants for isolated ITx remained constant in all pediatric age groups. Waitlist mortality increased to a peak around 2002, highest for L-ITx, in patients <1 year of age and adults. Deaths among all pediatric age groups awaiting L-ITx have decreased; adult L-ITx deaths have dropped less dramatically. Improved care of infants with intestinal failure has led to reduced referrals for L-ITx.
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Affiliation(s)
- K M Khan
- Transplant Institute, MedStar Georgetown University Hospital, Washington, DC
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96
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Abbasi MA, Ahmad S, Rehman A, Rasool S, Khan KM, Ashraf M, Nasar R, Ismail T. Sulfonamide Derivatives of 2-Amino-1-phenylethane as Suitable Cholinesterase Inhibitors. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i5.13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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97
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Hashmi AH, Ahmad N, Riaz S, Ali L, Siddiqi S, Khan KM, Shakoori AR, Mansoor A. Genotype CC of rs12979860 is providing protection against infection rather than assisting in treatment response for HCV genotype 3a infection. Genes Immun 2014; 15:430-2. [PMID: 24898388 DOI: 10.1038/gene.2014.31] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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: 09/05/2013] [Revised: 04/17/2014] [Accepted: 05/05/2014] [Indexed: 12/22/2022]
Abstract
Recent discovery of single-nucleotide polymorphisms located in the upstream region of interleukin-28B (IL28B) has shown association with interferon (IFN) treatment response especially in hepatitis C virus (HCV) genotype 1-infected patients. Pakistan, being the country with second highest prevalence of HCV with predominantly 3a genotype infection, bears a significant disease burden. The present study was conducted to evaluate the effect of rs12979860 genotypes on treatment response in HCV-3a-infected patients. This study shows that the CC genotype is providing protection against infection to HCV. But once infected, the CC genotype patients show viral persistence following IFN therapy. The TT genotype is assisting the 3a patients in viral clearance after IFN treatment. To our knowledge, this is the first study showing rs12979860 genotype association with IFN response in Pakistani HCV-3a-infected patients.
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Affiliation(s)
- A H Hashmi
- Institute of Biomedical and Genetic Engineering, Islamabad, Pakistan
| | - N Ahmad
- Institute of Biomedical and Genetic Engineering, Islamabad, Pakistan
| | - S Riaz
- Institute of Biomedical and Genetic Engineering, Islamabad, Pakistan
| | - L Ali
- Institute of Biomedical and Genetic Engineering, Islamabad, Pakistan
| | - S Siddiqi
- Institute of Biomedical and Genetic Engineering, Islamabad, Pakistan
| | - K M Khan
- Pakistan Academy of Sciences, Islamabad, Pakistan
| | - A R Shakoori
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - A Mansoor
- Institute of Biomedical and Genetic Engineering, Islamabad, Pakistan
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98
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Matsumoto CS, Kaufman SS, Island ER, Kallakury B, Yazigi NA, Khan KM, Fishbein TM. Hepatic explant pathology of pediatric intestinal transplant recipients previously treated with omega-3 fatty acid lipid emulsion. J Pediatr 2014; 165:59-64. [PMID: 24793206 DOI: 10.1016/j.jpeds.2014.03.034] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 02/14/2014] [Accepted: 03/19/2014] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To evaluate and compare the biochemical and histologic effect of parenteral fish oil lipid emulsion that is rich in omega-3 polyunsaturated fatty acids (O3FAs), Omegaven (Fresenius Kabi AG, Bad Homburg, Germany) with standard omega-6 polyunsaturated fatty acid (O6FA) parenteral nutrition. STUDY DESIGN Comparison of hepatic explant pathology and biochemical outcome on pediatric patients with intestinal failure treated with either parental O3FA or O6FA who had received a liver-inclusive intestine transplant. RESULTS Seven liver-inclusive intestinal transplants were performed in 7 patients who received O3FA for a mean of 62% ± 13% of total patient life-span (16.1 ± 7.0 months) before transplant. Median total bilirubin fell from 6.9 mg/dL at the start of treatment to 0.7 mg/dL at the time transplant (P < .02), which was a significant decrease compared with the similarly matched O6FA cohort (P = .012). All 7 of the 03FA-treated patients received a liver-inclusive intestinal transplant had advanced fibrosis (stage 3 or 4) noted on explant pathologic examination, despite a resolution of cholestasis at the time of transplant. Histologic inflammatory scores were lower (P = .056) in the 03FA group with similar degrees of advanced fibrosis as in the O6FA group. CONCLUSIONS In a matched comparison of patients undergoing intestinal transplantation with a history of extended O3FA lipid emulsion therapy that successfully reversed hyperbilirubinemia, significant hepatic fibrosis was present in the explanted livers despite a reduction in inflammation. This result confirms concern that the use of O3FA may have a limited role in altering the development of hepatic fibrosis from parenteral nutrition.
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Affiliation(s)
- Cal S Matsumoto
- MedStar Georgetown Transplant Institute, Georgetown University Hospital, Washington, DC.
| | - Stuart S Kaufman
- MedStar Georgetown Transplant Institute, Georgetown University Hospital, Washington, DC
| | - Eddie R Island
- MedStar Georgetown Transplant Institute, Georgetown University Hospital, Washington, DC
| | - Bhaskar Kallakury
- Department of Pathology, MedStar Georgetown University Hospital, Washington, DC
| | - Nada A Yazigi
- MedStar Georgetown Transplant Institute, Georgetown University Hospital, Washington, DC
| | - Khalid M Khan
- MedStar Georgetown Transplant Institute, Georgetown University Hospital, Washington, DC
| | - Thomas M Fishbein
- MedStar Georgetown Transplant Institute, Georgetown University Hospital, Washington, DC
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99
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Aziz AN, Taha M, Ismail NH, Anouar EH, Yousuf S, Jamil W, Awang K, Ahmat N, Khan KM, Kashif SM. Synthesis, crystal structure, DFT studies and evaluation of the antioxidant activity of 3,4-dimethoxybenzenamine schiff bases. Molecules 2014; 19:8414-33. [PMID: 24950444 PMCID: PMC6271405 DOI: 10.3390/molecules19068414] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 06/04/2014] [Accepted: 06/12/2014] [Indexed: 11/25/2022] Open
Abstract
Schiff bases of 3,4-dimethoxybenzenamine 1-25 were synthesized and evaluated for their antioxidant activity. All the synthesized compounds were characterized by various spectroscopic techniques. In addition, the characterizations of compounds 13, 15 and 16 were supported by crystal X-ray determinations and their geometrical parameters were compared with theoretical DFT calculations at the B3LYP level of theory. Furthermore, the X-ray crystal data of two non-crystalline compounds 8 and 18 were theoretically calculated and compared with the practical values of compounds 13, 15, 16 and found a good agreement. The compounds showed good DPPH scavenging activity ranging from 10.12 to 84.34 μM where compounds 1-4 and 6 showed stronger activity than the standard n-propyl gallate. For the superoxide anion radical assay, compounds 1-3 showed better activity than the standard.
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Affiliation(s)
- Ahmad Nazif Aziz
- Atta-ur-Rahman Institute for Natural Product Discovery, Universiti Teknologi MARA, 42300 Puncak Alam Campus, Malaysia.
| | - Muhammad Taha
- Atta-ur-Rahman Institute for Natural Product Discovery, Universiti Teknologi MARA, 42300 Puncak Alam Campus, Malaysia.
| | - Nor Hadiani Ismail
- Atta-ur-Rahman Institute for Natural Product Discovery, Universiti Teknologi MARA, 42300 Puncak Alam Campus, Malaysia.
| | - El Hassane Anouar
- Atta-ur-Rahman Institute for Natural Product Discovery, Universiti Teknologi MARA, 42300 Puncak Alam Campus, Malaysia.
| | - Sammer Yousuf
- Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, 75270 Karachi, Pakistan.
| | - Waqas Jamil
- Institute of Advance Research Studies in Chemical Sciences, University of Sindh Jamshoro, Hyderabad 76080, Pakistan.
| | - Khalijah Awang
- Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Norizan Ahmat
- Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia.
| | - Khalid M Khan
- Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, 75270 Karachi, Pakistan.
| | - Syed Muhammad Kashif
- Institute of Advance Research Studies in Chemical Sciences, University of Sindh Jamshoro, Hyderabad 76080, Pakistan.
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100
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Purev O, Oyun K, Odontuya G, Tankhaeva AM, Nikolaeva GG, Khan KM, Ali Shah ST, Voelter W. Isolation and Structure Elucidation of Two New Xanthones from Gentiana azurium Bunge (Fam. Gentianaceae). ACTA ACUST UNITED AC 2014. [DOI: 10.1515/znb-2002-0311] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Two new natural xanthones, 1,3,5-trihydroxy-8-methoxyxanthone (1) and 3,5-dihydroxy-8- methoxy-1-O-β-D-glucopyranosyl xanthone (2) were isolated along with two known xanthones from Gentiana azurium Bunge (Fam. Gentianaceae). Their structures were determined on the basis of their spectral data.
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Affiliation(s)
- O. Purev
- Institute of Chemistry and Chemical Technology, MAS, Ulaanbaatar-51, Mongolia
| | - Kh. Oyun
- Institute of Chemistry and Chemical Technology, MAS, Ulaanbaatar-51, Mongolia
| | - G. Odontuya
- Institute of Chemistry and Chemical Technology, MAS, Ulaanbaatar-51, Mongolia
| | - A. M. Tankhaeva
- Institute of Chemistry and Chemical Technology, MAS, Ulaanbaatar-51, Mongolia
| | - G. G. Nikolaeva
- Institute of Chemistry and Chemical Technology, MAS, Ulaanbaatar-51, Mongolia
| | - Khalid M. Khan
- HEJ Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Syed Tasadaque Ali Shah
- HEJ Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Wolfgang Voelter
- Abteilung für Physikalische Biochemie, Physiologisch-chemisches Institut der Universität, Hoppe-Seyler-Straße 4, D-72076 Tübingen, Germany
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