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Abdallah F, Neuman MD, Mariano ER. Postoperative pain management: are we ready to move beyond the 'kitchen-sink' approach? Anaesthesia 2023. [PMID: 37073454 DOI: 10.1111/anae.16025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/22/2023] [Indexed: 04/20/2023]
Affiliation(s)
- F Abdallah
- Department of Anesthesia and Pain Medicine, University of Ottawa, Ottawa, ON, Canada
| | - M D Neuman
- Department of Anesthesiology and Critical Care and Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - E R Mariano
- Department of Anesthesiology, Peri-operative and Pain Medicine, Stanford University School of Medicine, Stanford, CA, USA
- Anesthesiology and Peri-operative Care Service, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA
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abdeljalil R, Abu-shanab A, obeid Z, Abdallah F, Shannies T, harb A, el-edwan A. EP14.05-018 Major Lung Resection for Carcinoid Tumor; Does It Affect Quality of Life? J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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El Hajjar S, Dornaika F, Abdallah F, Barrena N. Consensus graph and spectral representation for one-step multi-view kernel based clustering. Knowl Based Syst 2022. [DOI: 10.1016/j.knosys.2022.108250] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Patel V, Brull R, Abdallah F. Serratus plane blocks in breast cancer surgery: a reply. Anaesthesia 2021; 77:228. [PMID: 34747009 DOI: 10.1111/anae.15618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/14/2021] [Indexed: 11/29/2022]
Affiliation(s)
- V Patel
- Toronto Western Hospital, Toronto, ON, Canada
| | - R Brull
- Toronto Western Hospital, Toronto, ON, Canada
| | - F Abdallah
- University of Ottawa, Ottawa, ON, Canada.,University of Toronto, Toronto, ON, Canada
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McCartney CJL, Abdallah F. Pain relief and recovery after breast cancer surgery: translating best evidence into practice. Anaesthesia 2020; 75:1136-1138. [DOI: 10.1111/anae.15033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/26/2020] [Indexed: 12/29/2022]
Affiliation(s)
- C. J. L. McCartney
- Department of Anesthesiology and Pain Medicine University of Ottawa ONCanada
| | - F. Abdallah
- Department of Anesthesiology and Pain Medicine University of Ottawa ONCanada
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Abstract
Person re-identification is one of the indispensable elements for visual surveillance. It assigns consistent labeling for the same person within the field of view of the same camera or even across multiple cameras. While handcrafted feature extraction is certainly one way of approaching this problem, in many cases, these features are becoming more and more complex. Besides, training a deep convolutional neural network (CNN) from scratch is difficult because it requires a large amount of labeled training data and a great deal of expertise to ensure proper convergence. This paper explores the following three main strategies for solving the person re-identification problem: (i) using handcrafted features, (ii) using transfer learning based on a pre-trained deep CNN (trained for object categorization) and (iii) training a deep CNN from scratch. Our experiments consistently demonstrated that: (1) The handcrafted features may still have favorable characteristics and benefits especially in cases where the learning database is not sufficient to train a deep network. (2) A fully trained Siamese CNN outperforms handcrafted approaches and the combination of pre-trained CNN with different re-identification processes. (3) Moreover, our experiments demonstrated that pre-trained features and handcrafted features perform equally well. These experiments have also revealed the most discriminative parts in the human body.
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Affiliation(s)
- C. Chahla
- University of Technology of Troyes, 12 Rue Marie Curie, CS 42060, 10004 Troyes CEDEX, France
- Lebanese University, P. O. Box 6573/14 Badaro, Museum, Beirut, Lebanon
| | - H. Snoussi
- University of Technology of Troyes, 12 Rue Marie Curie, CS 42060, 10004 Troyes CEDEX, France
| | - F. Abdallah
- University of Technology of Troyes, 12 Rue Marie Curie, CS 42060, 10004 Troyes CEDEX, France
- Lebanese University, P. O. Box 6573/14 Badaro, Museum, Beirut, Lebanon
| | - F. Dornaika
- University of the Basque Country UPV/EHU, San Sebastian, Basque Autonomous Community, Spain
- IKERBASQUE, Basque Foundation for Science, Maria Diaz de Haro #3, 6 Solairua, 48013 Bilbao, Bizkaia, Spain
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Samir M, Hamed M, Abdallah F, Kinh Nguyen V, Hernandez-Vargas EA, Seehusen F, Baumgärtner W, Hussein A, Ali AAH, Pessler F. An Egyptian HPAI H5N1 isolate from clade 2.2.1.2 is highly pathogenic in an experimentally infected domestic duck breed (Sudani duck). Transbound Emerg Dis 2018; 65:859-873. [PMID: 29363279 DOI: 10.1111/tbed.12816] [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] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Indexed: 01/26/2023]
Abstract
The highly pathogenic avian influenza (HPAI) H5N1 viruses continue to cause major problems in poultry and can, although rarely, cause human infection. Being enzootic in domestic poultry, Egyptian isolates are continuously evolving, and novel clades vary in their pathogenicity in avian hosts. Considering the importance of domestic ducks as natural hosts of HPAI H5N1 viruses and their likelihood of physical contact with other avian hosts and humans, it is of utmost importance to characterize the pathogenicity of newly emerged HPAI strains in the domestic duck. The most recently identified Egyptian clade 2.2.1.2 HPAI H5N1 viruses have been isolated from naturally infected pigeons, turkeys and humans. However, essentially nothing is known about their pathogenicity in domestic ducks. We therefore characterized the pathogenicity of an Egyptian HPAI H5N1 isolate A/chicken/Faquos/amn12/2011 (clade 2.2.1.2) in Sudani duck, a domestic duck breed commonly reared in Egypt. While viral transcription (HA mRNA) was highest in lung, heart and kidney peaking between 40 and 48 hpi, lower levels were detected in brain. Weight loss of infected ducks started at 16 hpi and persisted until 120 hpi. The first severe clinical signs were noted by 32 hpi and peaked in severity at 72 and 96 hpi. Haematological analyses showed a decline in total leucocytes, granulocytes, platelets and granulocyte/lymphocyte ratio, but lymphocytosis. Upon necropsy, lesions were obvious in heart, liver, spleen and pancreas and consisted mainly of necrosis and petechial haemorrhage. Histologically, lungs were the most severely affected organs, whereas brain only showed mild neuronal degeneration and gliosis at 48 hpi despite obvious neurological clinical signs. Taken together, our results provide first evidence that this HPAI H5N1 isolate (clade 2.2.1.2) is highly pathogenic to Sudani ducks and highlight the importance of this breed as potential reservoir and disseminator of HPAI strains from this clade.
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Affiliation(s)
- M Samir
- TWINCORE, Center for Experimental and Clinical Infection Research, Hannover, Germany.,Department of Zoonoses, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - M Hamed
- Marsa matrouh branch, Animal Health Research Institute, Dokki, Giza, Egypt
| | - F Abdallah
- Department of Virology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - V Kinh Nguyen
- Systems Medicine of Infectious Diseases, Department of Systems Immunology and Braunschweig Integrated Centre of Systems Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - E A Hernandez-Vargas
- Systems Medicine of Infectious Diseases, Department of Systems Immunology and Braunschweig Integrated Centre of Systems Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - F Seehusen
- Department of Pathology, University of Veterinary Medicine, Hannover, Germany
| | - W Baumgärtner
- Department of Pathology, University of Veterinary Medicine, Hannover, Germany
| | - A Hussein
- Department of Avian and Rabbit Medicine, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - A A H Ali
- Department of Virology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - F Pessler
- TWINCORE, Center for Experimental and Clinical Infection Research, Hannover, Germany.,Helmholtz Centre for Infection Research, Braunschweig, Germany
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Farahat M, Abdallah F, Abdel-Hamid T, Hernandez-Santana A. Effect of supplementing broiler chicken diets with green tea extract on the growth performance, lipid profile, antioxidant status and immune response. Br Poult Sci 2016; 57:714-722. [DOI: 10.1080/00071668.2016.1196339] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ali A, Elmowalid G, Abdel-Glil M, Sharafeldin T, Abdallah F, Mansour S, Nagy A, Ahmed B, Abdelmoneim M. Etiology and pathology of epidemic outbreaks of avian influenza H5N1 infection in Egyptian chicken farms. Pol J Vet Sci 2015; 18:779-86. [DOI: 10.1515/pjvs-2015-0101] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractEpidemic outbreaks of avian influenza (AI) virus H5N1 have been frequently reported in Egypt during the last nine years. Here we investigate the involvement of AI H5N1 in outbreaks of acute respiratory disease that occurred in several commercial chicken farms in Egypt in 2011, and we describe to the pathology caused by the virus in the course of the outbreak.Twenty-one chicken farms with history of acute respiratory symptoms and high mortalities were screened for AI H5N1. Virus identification was based on hemagglutination inhibition test, and PCR detection and sequencing of the hemagglutinin and neuraminidase genes. Virus distribution was determined by immunohistochemical staining of AI antigens in organs of infected birds. Standard H&E staining was performed for histological examination of affected organs.Eighty-one % of the examined birds, representing 100% of the screened farms, were positive for AI H5N1 virus. Phylogenetic analysis of the hemagglutinin and neuraminidase genes of the isolated virus reveals its affiliation to clade 2.2.1. Viral antigens were localized in the endothelial cells of the heart, liver, lungs and skin, where pathological lesions including congestion, hemorrhages, multifocal inflammation and necrosis were concurrently observed. According to the pattern of the viral antigen and lesion distribution in the visceral organs, we suggest cardiovascular and circulatory failures as the probable cause of death during these outbreaks. In conclusion, the present study further confirms the epidemic status of AI H5N1 virus in Egypt and reveals the highly pathogenic nature of the local isolates.
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Ragab HS, Ibrahim FA, Abdallah F, A. Al-Ghamdi A, El-Tantawy F, Yakuphanoglu F. Synthesis and In Vitro Antibacterial Properties of Hydroxyapatite Nanoparticles. ACTA ACUST UNITED AC 2014. [DOI: 10.9790/3008-09167785] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
Spontaneous femoral artery pseudoaneurysm is a rare disease and reported cases are very few. Most of them are related to underlying pathology either atherosclerotic disease or connective tissue disease. We present a 29-year-old healthy man with two months history of a painful pulsating mass at the level of the lower right thigh without any previous history of trauma, surgery or puncture of the femoral artery. An angiogram revealed a right superficial femoral artery pseudo-aneurysm. It was treated surgically by resection of the aneurysm, reconstruction with inter-positional saphenous vein graft. We reported this case because of its rare incidence in the young patient with no underlying pathology.
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Affiliation(s)
- M Alsmady
- Jordan University Hospital, Amman, Jordan
| | - F Abdallah
- Jordan University Hospital, Amman, Jordan
| | - H Shanti
- Jordan University Hospital, Amman, Jordan
| | - O Samara
- Jordan University Hospital, Amman, Jordan
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Mutai L, Abdallah F, Kaiser F. AN UNUSUAL PRESENTATION OF ACUTE LYMPHOBLASTIC LEUKAEMIA WITH PERI-CARDIAL EFFUSION CAUSING CARDIAC TAMPONADE. East Afr Med J 2012; 89:142-143. [PMID: 26856039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Peri-cardial effusion is most commonly associated with tuberculous infection in the developing world. Peri-cardial effusion causes symptoms when it is large or when it has accumulated rapidly. Non-tuberculous causes of peri-cardial effusion include bacterial infections, uraemia, viral infections, rheumatic fever, connective tissue disorders, post - peri-cardiotomy syndromes and malignancy. We present a case of acute lymphoblastic leukaemia first presenting as a large peri-cardial effusion causing tamponade.
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Affiliation(s)
- L Mutai
- Kenyatta National Hospital, Nairobi, Kenya
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Kanazi G, Abdallah F, Dabbous A, Atweh S, El-Khatib M. Headache and nuchal rigidity and photophobia after an epidural blood patch: diagnosis by exclusion of persistent post-dural puncture headache mimicking meningitis. Br J Anaesth 2010; 105:871-3. [PMID: 21081687 DOI: 10.1093/bja/aeq326] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Masauni S, Mohammed M, Leyna G, Mosha F, Mghamba J, Omar K, Ali H, Abdallah F, Oleribe O, Mmbuji P. Controlling persistent cholera outbreaks in Africa: Lessons from the recent Cholera Outbreak, West District Unguja Zanzibar, Tanzania, 2009. Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.1549] [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: 10/19/2022] Open
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Braunberger E, Deloche A, Berrebi A, Abdallah F, Celestin JA, Meimoun P, Chatellier G, Chauvaud S, Fabiani JN, Carpentier A. Very long-term results (more than 20 years) of valve repair with carpentier's techniques in nonrheumatic mitral valve insufficiency. Circulation 2001; 104:I8-11. [PMID: 11568021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
BACKGROUND Mitral valve repair is considered the gold standard in surgery of degenerative mitral valve insufficiency (MVI), but the long-term results (>20 years) are unknown. METHODS AND RESULTS We reviewed the first 162 consecutive patients who underwent mitral valve repair between 1970 and 1984 for MVI due to nonrheumatic disease. The cause of MVI was degenerative in 146 patients (90%) and bacterial endocarditis in 16 patients (10%). MVI was isolated or, in 18 cases, associated with tricuspid insufficiency. The mean age of the 162 patients (104 men and 58 women) was 56+/-10 years (age range 22 to 77 years). New York Heart Association functional class was I, II, III, and IV in 2%, 39%, 52%, and 7% of patients, respectively. The mean cardiothoracic ratio was 0.58+/-0.07 (0.4 to 0.8), and 72 (45%) patients had atrial fibrillation. Valve analysis showed that the main mechanism of MVI was type II Carpentier's functional classification in 152 patients. The leaflet prolapse involved the posterior leaflet in 93 patients, the anterior leaflet in 28 patients, and both leaflets in 31 patients. Surgical technique included a Carpentier's ring annuloplasty in all cases, a valve resection in 126 patients, and shortening or transposition of chordae in 49 patients. During the first postoperative month, there were 3 deaths (1.9%) and 3 reoperations (2 valve replacements and 1 repeat repair [1.9%]). Six patients were lost to follow-up. The remaining 151 patients with mitral valve repair were followed during a median of 17 years (range 1 to 29 years; 2273 patient-years). The 20-year Kaplan-Meier survival rate was 48% (95% CI 40% to 57%), which is similar to the survival rate for a normal population with the same age structure. The 20-year rates were 19.3% (95% CI 11% to 27%) for cardiac death and 26% (95% CI 17% to 35%) for cardiac morbidity/mortality (including death from a cardiac cause, stroke, and reoperation). During the 20 years of follow-up, 7 patients were underwent surgery at 3, 7, 7, 8, 8, 10, or 12 years after the initial operation. Valve replacement was carried out in 5 patients, and repeat repair was carried out in 2 patients. At the end of the study, 65 patients remained alive (median follow-up 19 years). Their median age was 76 years (age range 41 to 95 years). All except 1 were in New York Heart Association functional class I/II. CONCLUSIONS Mitral valve repair using Carpentier's technique in patients with nonrheumatic MVI provides excellent long-term results with a mortality rate similar to that of the general population and a very low incidence of reoperation.
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Affiliation(s)
- E Braunberger
- Departments of Cardiovascular Surgery, HEGP and Broussai's Hospital, Paris, France.
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Abdallah F, Salamini F, Leister D. A prediction of the size and evolutionary origin of the proteome of chloroplasts of Arabidopsis. Trends Plant Sci 2000; 5:141-2. [PMID: 10928822 DOI: 10.1016/s1360-1385(00)01574-0] [Citation(s) in RCA: 161] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Affiliation(s)
- F Abdallah
- Max-Planck-Institut für Züchtungsforschung, Köln, Germany
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Rotrekl V, Nejedlá E, Kucera I, Abdallah F, Palme K, Brzobohatý B. The role of cysteine residues in structure and enzyme activity of a maize beta-glucosidase. Eur J Biochem 1999; 266:1056-65. [PMID: 10583402 DOI: 10.1046/j.1432-1327.1999.00948.x] [Citation(s) in RCA: 15] [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] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The maize Zm-p60.1 gene encodes a beta-glucosidase that can release active cytokinins from their storage forms, cytokinin-O-glucosides. Mature catalytically active Zm-p60.1 is a homodimer containing five cysteine residues per a subunit. Their role was studied by mutating them to alanine (A), serine (S), arginine (R) or aspartic acid (D) using site-directed mutagenesis, and subsequent heterologous expression in Escherichia coli. All substitutions of C205 and C211 resulted in decreased formation and/or stability of the homodimer, manifested as accumulation of high levels of monomer in the bacterial expression system. Examination of urea- and glutathione-induced dissociation patterns of the homodimer to the monomers, HPLC profiles of hydrolytic fragments of reduced and oxidized forms, and a homology-based three-dimensional structural model revealed that an intramolecular disulfide bridge formed between C205 and C211 within the subunits stabilized the quaternary structure of the enzyme. Mutating C52 to R produced a monomeric enzyme protein, too. No detectable effects on homodimer formation were apparent in C170 and C479 mutants. Given the Km values for C170A/S mutants were equal to that for the wild-type enzyme, C170 cannot participate in enzyme-substrate interactions. Possible indirect effects of C170A/S mutations on catalytic activity of the enzyme were inferred from slight decreases in the apparent catalytic activity, k'cat. C170 is located on a hydrophobic side of an alpha-helix packed against hydrophobic amino-acid residues of beta-strand 4, indicating participation of C170 in stabilization of a (beta/alpha)8 barrel structure in the enzyme. In C479A/D/R/S mutants, Km and k'cat were influenced more significantly suggesting a role for C479 in enzyme catalytic action.
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Affiliation(s)
- V Rotrekl
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
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Drissa H, Abdallah F, Zaouali RM. [Carpentier's mitral valvuloplasty. Immediate, early, and long term results. 40 cases]. Tunis Med 1993; 71:433-40. [PMID: 8273184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- H Drissa
- Service de Cardiologie Adultes, Hôpital la Rabta, Tunis
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Arora PK, Riachi NJ, Fiedler GC, Singh MP, Abdallah F, Harik SI, Sayre LM. Structure-neurotoxicity trends of analogues of 1-methyl-4-phenylpyridinium (MPP+), the cytotoxic metabolite of the dopaminergic neurotoxin MPTP. Life Sci 1990; 46:379-90. [PMID: 2304377 DOI: 10.1016/0024-3205(90)90018-m] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The dopaminergic neurotoxicity of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) derives from its metabolism to 1-methyl-4-phenyl-pyridinium cation (MPP+), which is then selectively accumulated in dopaminergic neurons. In an effort to assess the structural requirements governing MPP+ cytotoxicity, we evaluated dopaminergic toxicity of MPP+ analogues 3 weeks after their microinfusion into rat substantia nigra. We also evaluated the substrate suitability of MPP+ analogues for high-affinity dopamine uptake in striatal synaptosomes by measuring their ability to induce specific dopamine release. The intranigral neurotoxicity of MPP+ analogues in vivo correlates mainly with their in vitro inhibitory activity on mitochondrial respiration, consistent with a compromise in cellular energy production as the principal mechanism of MPTP-induced cell death. This study extends the structure-neurotoxicity data base beyond that obtainable using MPTP analogues, since many of these are not metabolized to pyridinium compounds. Such information is crucial to assess which possible endogenous or exogenous compounds may exert MPTP/MPP(+)-like toxicity.
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Affiliation(s)
- P K Arora
- Department of Chemistry, Case Western Reserve University, Cleveland, OH 44106
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