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Costa T, Fernandez-Villalba E, Izura V, Lucas-Ochoa AM, Menezes-Filho NJ, Santana RC, de Oliveira MD, Araújo FM, Estrada C, Silva V, Costa SL, Herrero MT. Combined 1-Deoxynojirimycin and Ibuprofen Treatment Decreases Microglial Activation, Phagocytosis and Dopaminergic Degeneration in MPTP-Treated Mice. J Neuroimmune Pharmacol 2020; 16:390-402. [PMID: 32564332 DOI: 10.1007/s11481-020-09925-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 05/14/2020] [Indexed: 12/28/2022]
Abstract
Inflammation is a predominant aspect of neurodegenerative diseases and experimental studies performed in animal models of Parkinson's disease (PD) suggesting that a sustained neuroinflammation exacerbates the nigrostriatal degeneration pathway. The central role of microglia in neuroinflammation has been studied as a target for potential neuroprotective drugs for PD, for example nonsteroidal anti-inflammatory drugs (NSAIDs) and matrix metalloproteinases (MMP) inhibitors that regulates microglial activation and migration. The aim of this study was to investigate the neuroprotective response of the iminosugar 1-deoxynojirimycin (1-DNJ) and compare its effect with a combined treatment with ibuprofen. MPTP-treated mice were orally dosed with ibuprofen and/or 1-DNJ 1. Open-field test was used to evaluate behavioral changes. Immunohistochemistry for dopaminergic neurons marker (TH+) and microglia markers (Iba-1+; CD68+) were used to investigate neuronal integrity and microglial activation in the substantia nigra pars compacta (SNpc). The pro-inflammatory cytokines TNF-α and IL-6 were analysed by qPCR. Treatments with either 1-DNJ or Ibuprofen alone did not reduce the damage induced by MPTP intoxication. However, combined treatment with 1-DNJ and ibuprofen prevents loss of mesencephalic dopaminergic neurons, decreases the number of CD68+/ Iba-1+ cells, the microglia/neurons interactions, and the pro-inflammatory cytokines, and improves behavioral changes when compared with MPTP-treated animals. In conclusion, these data demonstrate that the combined treatment with a MMPs inhibitor (1-DNJ) plus an anti-inflammatory drug (ibuprofen) has neuroprotective effects open for future therapeutic interventions. Graphical Abstract MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine) is a protoxicant that, after crossing the Blood Brain Barrier, is metabolized by astrocytic MAO-B to MPDP+, a pyridinium intermediate, which undergoes further two-electron oxidation to yield the toxic metabolite MPP+ (methyl-phenyltetrahydropyridinium) that is then selectively transported into nigral neurons via the mesencephalic dopamine transporter. In this study, we demonstrated that MPTP induced death of dopaminergic neurons, microgliosis, increase of gliapses, motor impairment and neuroinflammation in mice, which were inhibited by combined 1-deoxynojirimycin and ibuprofen treatment.
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Affiliation(s)
- Tcs Costa
- Clinical & Experimental Neuroscience (NiCE). Institute for Bio-Health Research of Murcia (IMIB), Institute for Aging Research (IUIE). School of Medicine, University of Murcia, Murcia, Spain.,Department of Biochemistry and Biophysics, Laboratory of Neurochemistry and Cell Biology, Institute of Health Sciences, Federal University of Bahia, Salvador, Bahia, 40110-100, Brazil
| | - E Fernandez-Villalba
- Clinical & Experimental Neuroscience (NiCE). Institute for Bio-Health Research of Murcia (IMIB), Institute for Aging Research (IUIE). School of Medicine, University of Murcia, Murcia, Spain
| | - V Izura
- Clinical & Experimental Neuroscience (NiCE). Institute for Bio-Health Research of Murcia (IMIB), Institute for Aging Research (IUIE). School of Medicine, University of Murcia, Murcia, Spain
| | - A M Lucas-Ochoa
- Clinical & Experimental Neuroscience (NiCE). Institute for Bio-Health Research of Murcia (IMIB), Institute for Aging Research (IUIE). School of Medicine, University of Murcia, Murcia, Spain
| | - N J Menezes-Filho
- Department of Biochemistry and Biophysics, Laboratory of Neurochemistry and Cell Biology, Institute of Health Sciences, Federal University of Bahia, Salvador, Bahia, 40110-100, Brazil
| | - R C Santana
- Department of Bioregulation, Laboratory of Neuroscience, Institute of Health Sciences, Federal University of Bahia, Salvador, Bahia, 40110-100, Brazil
| | - M D de Oliveira
- Department of Biochemistry and Biophysics, Laboratory of Neurochemistry and Cell Biology, Institute of Health Sciences, Federal University of Bahia, Salvador, Bahia, 40110-100, Brazil.,Faculty of Ceilandia, University of Brasilia - UnB, Brasilia, Federal District, Brazil
| | - F M Araújo
- Clinical & Experimental Neuroscience (NiCE). Institute for Bio-Health Research of Murcia (IMIB), Institute for Aging Research (IUIE). School of Medicine, University of Murcia, Murcia, Spain.,Department of Biochemistry and Biophysics, Laboratory of Neurochemistry and Cell Biology, Institute of Health Sciences, Federal University of Bahia, Salvador, Bahia, 40110-100, Brazil
| | - C Estrada
- Clinical & Experimental Neuroscience (NiCE). Institute for Bio-Health Research of Murcia (IMIB), Institute for Aging Research (IUIE). School of Medicine, University of Murcia, Murcia, Spain
| | - Vda Silva
- Department of Biochemistry and Biophysics, Laboratory of Neurochemistry and Cell Biology, Institute of Health Sciences, Federal University of Bahia, Salvador, Bahia, 40110-100, Brazil
| | - S L Costa
- Department of Biochemistry and Biophysics, Laboratory of Neurochemistry and Cell Biology, Institute of Health Sciences, Federal University of Bahia, Salvador, Bahia, 40110-100, Brazil.
| | - M T Herrero
- Clinical & Experimental Neuroscience (NiCE). Institute for Bio-Health Research of Murcia (IMIB), Institute for Aging Research (IUIE). School of Medicine, University of Murcia, Murcia, Spain.
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2
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Bourdenx M, Nioche A, Dovero S, Arotcarena ML, Camus S, Porras G, Thiolat ML, Rougier NP, Prigent A, Aubert P, Bohic S, Sandt C, Laferrière F, Doudnikoff E, Kruse N, Mollenhauer B, Novello S, Morari M, Leste-Lasserre T, Trigo-Damas I, Goillandeau M, Perier C, Estrada C, Garcia-Carrillo N, Recasens A, Vaikath NN, El-Agnaf OMA, Herrero MT, Derkinderen P, Vila M, Obeso JA, Dehay B, Bezard E. Identification of distinct pathological signatures induced by patient-derived α-synuclein structures in nonhuman primates. Sci Adv 2020; 6:eaaz9165. [PMID: 32426502 PMCID: PMC7220339 DOI: 10.1126/sciadv.aaz9165] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 03/06/2020] [Indexed: 06/11/2023]
Abstract
Dopaminergic neuronal cell death, associated with intracellular α-synuclein (α-syn)-rich protein aggregates [termed "Lewy bodies" (LBs)], is a well-established characteristic of Parkinson's disease (PD). Much evidence, accumulated from multiple experimental models, has suggested that α-syn plays a role in PD pathogenesis, not only as a trigger of pathology but also as a mediator of disease progression through pathological spreading. Here, we have used a machine learning-based approach to identify unique signatures of neurodegeneration in monkeys induced by distinct α-syn pathogenic structures derived from patients with PD. Unexpectedly, our results show that, in nonhuman primates, a small amount of singular α-syn aggregates is as toxic as larger amyloid fibrils present in the LBs, thus reinforcing the need for preclinical research in this species. Furthermore, our results provide evidence supporting the true multifactorial nature of PD, as multiple causes can induce a similar outcome regarding dopaminergic neurodegeneration.
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Affiliation(s)
- M. Bourdenx
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - A. Nioche
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- Institut Jean Nicod, Département d’études cognitives, ENS, EHESS, PSL Research University, 75005 Paris, France
- Institut Jean Nicod, Département d’études cognitives, CNRS, UMR 8129, Paris, France
| | - S. Dovero
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - M.-L. Arotcarena
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - S. Camus
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - G. Porras
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - M.-L. Thiolat
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - N. P. Rougier
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- INRIA Bordeaux Sud-Ouest, 33405 Talence, France
| | - A. Prigent
- INSERM, U1235, Nantes F-44035, France
- Nantes University, Nantes F-44035, France
- CHU Nantes, Department of Neurology, Nantes F-44093, France
| | - P. Aubert
- INSERM, U1235, Nantes F-44035, France
- Nantes University, Nantes F-44035, France
- CHU Nantes, Department of Neurology, Nantes F-44093, France
| | - S. Bohic
- EA-7442 Rayonnement Synchrotron et Recherche Medicale, RSRM, University of Grenoble Alpes, 38000 Grenoble, France
| | - C. Sandt
- SMIS beamline, Synchrotron SOLEIL, l’orme des merisiers, 91192 Gif sur Yvette, France
| | - F. Laferrière
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - E. Doudnikoff
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - N. Kruse
- Paracelsus-Elena-Klinik, Kassel, Germany
- University Medical Center Goettingen, Institute of Neuropathology, Goettingen, Germany
| | - B. Mollenhauer
- Paracelsus-Elena-Klinik, Kassel, Germany
- University Medical Center Goettingen, Institute of Neuropathology, Goettingen, Germany
| | - S. Novello
- Department of Medical Sciences, Section of Pharmacology, University of Ferrara, via Fossato di Mortara 17-19, 44121 Ferrara, Italy
- Neuroscience Center and National Institute of Neuroscience, University of Ferrara, via Fossato di Mortara 17-19, 44121 Ferrara, Italy
| | - M. Morari
- Department of Medical Sciences, Section of Pharmacology, University of Ferrara, via Fossato di Mortara 17-19, 44121 Ferrara, Italy
- Neuroscience Center and National Institute of Neuroscience, University of Ferrara, via Fossato di Mortara 17-19, 44121 Ferrara, Italy
| | - T. Leste-Lasserre
- INSERM, Neurocentre Magendie, U1215, Physiopathologie de la Plasticité Neuronale, F-33000 Bordeaux, France
| | - I. Trigo-Damas
- HM CINAC, HM Puerta del Sur and CEU–San Pablo University Madrid, E-28938 Mostoles, Spain
- Center for Networked Biomedical Research on Neurodegenerative Diseases (CIBERNED), Instituto Carlos III, Madrid, Spain
| | - M. Goillandeau
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - C. Perier
- Center for Networked Biomedical Research on Neurodegenerative Diseases (CIBERNED), Instituto Carlos III, Madrid, Spain
- Neurodegenerative Diseases Research Group, Vall d’Hebron Research Institute (VHIR)–Center for Networked Biomedical Research on Neurodegenerative Diseases (CIBERNED), Barcelona, Spain
| | - C. Estrada
- Clinical and Experimental Neuroscience Unit, School of Medicine, Biomedical Research Institute of Murcia (IMIB), University of Murcia, Campus Mare Nostrum, 30100 Murcia, Spain
- Institute of Research on Aging (IUIE), School of Medicine, University of Murcia, 30100 Murcia, Spain
| | - N. Garcia-Carrillo
- Centro Experimental en Investigaciones Biomédica (CEIB), Universidad de Murcia, Murcia, Spain
| | - A. Recasens
- Center for Networked Biomedical Research on Neurodegenerative Diseases (CIBERNED), Instituto Carlos III, Madrid, Spain
- Neurodegenerative Diseases Research Group, Vall d’Hebron Research Institute (VHIR)–Center for Networked Biomedical Research on Neurodegenerative Diseases (CIBERNED), Barcelona, Spain
| | - N. N. Vaikath
- Neurological Disorders Research Center, Qatar Biomedical Research Institute (QBRI), Hamad Bin Khalifa University (HBKU), Education City, Qatar
| | - O. M. A. El-Agnaf
- Neurological Disorders Research Center, Qatar Biomedical Research Institute (QBRI), Hamad Bin Khalifa University (HBKU), Education City, Qatar
| | - M. T. Herrero
- Clinical and Experimental Neuroscience Unit, School of Medicine, Biomedical Research Institute of Murcia (IMIB), University of Murcia, Campus Mare Nostrum, 30100 Murcia, Spain
- Institute of Research on Aging (IUIE), School of Medicine, University of Murcia, 30100 Murcia, Spain
| | - P. Derkinderen
- INSERM, U1235, Nantes F-44035, France
- Nantes University, Nantes F-44035, France
- CHU Nantes, Department of Neurology, Nantes F-44093, France
| | - M. Vila
- Center for Networked Biomedical Research on Neurodegenerative Diseases (CIBERNED), Instituto Carlos III, Madrid, Spain
- Neurodegenerative Diseases Research Group, Vall d’Hebron Research Institute (VHIR)–Center for Networked Biomedical Research on Neurodegenerative Diseases (CIBERNED), Barcelona, Spain
- Department of Biochemistry and Molecular Biology, Autonomous University of Barcelona (UAB), Barcelona, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain
| | - J. A. Obeso
- HM CINAC, HM Puerta del Sur and CEU–San Pablo University Madrid, E-28938 Mostoles, Spain
- Center for Networked Biomedical Research on Neurodegenerative Diseases (CIBERNED), Instituto Carlos III, Madrid, Spain
| | - B. Dehay
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - E. Bezard
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
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3
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Cuenca L, Gil-Martinez AL, Cano-Fernandez L, Sanchez-Rodrigo C, Estrada C, Fernandez-Villalba E, Herrero MT. Parkinson's disease: a short story of 200 years. Histol Histopathol 2018; 34:573-591. [PMID: 30540129 DOI: 10.14670/hh-18-073] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
After Alzheimer's disease, Parkinson's disease (PD) is the second most prevalent and incidental neurodegenerative disorder, affecting more than 2% of the population older than 65 years old. Since it was first described 200 years ago by Dr James Parkinson, great steps have been made in the understanding of the pathology. However, the cause(s) that initiates and perpetuates the neurodegenerative process is (are) still not clear. Thus, early diagnosis is not available, nor are there efficient therapies that can stop neurodegeneration. PD clinical features are defined by motor (like bradykinesia, resting tremor, gait impairment) and non-motor symptoms (like constipation, apathy, fathigue, olfactory dysfunction, depression and cognitive decline) that get more severe as the disease advances. Neuropathological hallmarks comprise selective loss of dopaminergic neurons in the Substantia Nigra pars compacta (SNpc) and Lewy bodies (LB) in different nuclei of the nervous system. Numerous studies have shown that these pathological features are aggravated by the confluence of other contributing factors, such as a genetic component, exposure to environmental toxins, mitochondrial dysfunction, increase of oxidative stress, calcium imbalance and chronic neuroinflammation, among others. Here, we provide a summary of the actual state of PD's pathology, the most studied molecular mechanisms, classic and novel therapeutic strategies and diagnosis methods, especially highlighting recent advances in these 200 years.
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Affiliation(s)
- L Cuenca
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain.,Biosanitary Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, Murcia, Spain
| | - A L Gil-Martinez
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain.,Biosanitary Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, Murcia, Spain
| | - L Cano-Fernandez
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain.,Biosanitary Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, Murcia, Spain
| | - C Sanchez-Rodrigo
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain.,Biosanitary Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, Murcia, Spain
| | - C Estrada
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain.,Biosanitary Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, Murcia, Spain
| | - E Fernandez-Villalba
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain.,Biosanitary Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, Murcia, Spain
| | - M T Herrero
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain.,Biosanitary Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, Murcia, Spain.
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Ibarra R, Rich KM, Adasme M, Kamp A, Singer RS, Atlagich M, Estrada C, Jacob R, Zimin-Veselkoff N, Escobar-Dodero J, Mardones FO. Animal production, animal health and food safety: Gaps and challenges in the chilean industry. Food Microbiol 2018; 75:114-118. [PMID: 30056955 DOI: 10.1016/j.fm.2017.10.004] [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: 03/12/2017] [Revised: 10/04/2017] [Accepted: 10/06/2017] [Indexed: 10/18/2022]
Abstract
This paper summarizes the gaps and challenges related to animal production, health, and food safety as discussed by a panel at the 1st International Symposium of Food Safety (ISFS) in Santiago, Chile, in December 2016. Participating representatives of academia, industry, and government and statements from the audience confirmed that food safety is essential for increasing food security. First, panelists identified the need for a science-based regulatory framework to implement effective regulations. Second, they highlighted the importance of a risk analysis framework to quantify the risk of the potential for antimicrobial resistance associated with the use of antimicrobials, and the need of studies to evaluate foodborne prevention/control strategies. Third, the challenges of filling the gaps between industry and academia were addressed, including examples of successful collaboration, opportunities, and weakness identified by industry. Finally, challenges in animal food production included issues related to changing consumer preferences, animal welfare, the use of antimicrobials, and sustainable animal production. The symposium provided a regional platform to share experiences from the implementation of methods and approaches for food safety. The roundtable successfully explored the future science and technology challenges that are of strategic importance for Chile and the region in animal health and food safety.
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Affiliation(s)
- R Ibarra
- Instituto Tecnológico del Salmón (INTESAL de SalmonChile), Av. Juan Soler Manfredini 41, Of. 1802, Puerto Montt, Chile
| | - K M Rich
- International Livestock Research Institute, East and Southeast Asia Regional Office, Hanoi, Viet Nam
| | - M Adasme
- Asociación Gremial de Productores de Cerdos de Chile (ASPROCER), Av. Isidora Goyenechea 2939, Of. 101, Las Condes, Santiago, Chile
| | - A Kamp
- SOPRAVAL, Panamericana Norte 500, La Calera, Valparaíso, Chile
| | - R S Singer
- Department of Veterinary and Biomedical Sciences, University of Minnesota, 1971 Commonwealth Ave., St. Paul, MN 55108, USA; Instituto de Medicina Preventiva Veterinaria, Facultad de Ciencias, Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | - M Atlagich
- AGROSUPER, Camino La Estrella 401, Of. 7, Sector Punta de Cortés, Rancagua, Chile
| | - C Estrada
- United States Department of Agriculture, Animal and Plant Health Inspection Service, International Affairs (USDA-APHIS-IS), US Embassy, SES Quadra 801, Brasilia 70403-900, Brazil
| | - R Jacob
- Agencia Chilena para la Inocuidad y Calidad Alimentaria (ACHIPIA), Calle Nueva York 17, 4to piso, Santiago, Chile
| | - N Zimin-Veselkoff
- Escuela de Medicina Veterinaria, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello (UNAB), Republica 440, Santiago, Chile
| | - J Escobar-Dodero
- Escuela de Medicina Veterinaria, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello (UNAB), Republica 440, Santiago, Chile
| | - F O Mardones
- Escuela de Medicina Veterinaria, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello (UNAB), Republica 440, Santiago, Chile.
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Melo-Thomas L, Gil-Martínez AL, Cuenca L, Estrada C, Gonzalez-Cuello A, Schwarting RK, Herrero MT. Electrical stimulation or MK-801 in the inferior colliculus improve motor deficits in MPTP-treated mice. Neurotoxicology 2018; 65:38-43. [PMID: 29366825 DOI: 10.1016/j.neuro.2018.01.004] [Citation(s) in RCA: 6] [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] [Received: 10/17/2017] [Revised: 01/16/2018] [Accepted: 01/17/2018] [Indexed: 12/31/2022]
Abstract
The inferior colliculus (IC) is an important midbrain relay station for the integration of descending and ascending auditory information. Additionally, the IC has been implicated in processing sensorimotor responses. Glutamatergic and GABAergic manipulations in the IC can improve motor deficits as demonstrated by the animal model of haloperidol-induced catalepsy. However, how the IC influences motor function remains unclear. We investigated the effects of either intracollicular deep brain stimulation (DBS) or microinjection of the glutamatergic antagonist MK-801 or the agonist NMDA in C57BL/6J mice chronically treated with saline or 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). After DBS or microinjections, the mice were submitted to rotarod and open field tests, respectively. DBS in the IC was effective to increase the time spent on the rotarod in MPTP-treated mice. After unilateral microinjection of MK-801, but not NMDA, MPTP-treated mice increased the distance travelled in the open field (p < 0.05). In conclusion, intracollicular DBS or MK-801 microinjection can improve motor performance in parkinsonian mice suggesting the IC as a new and non-conventional therapeutic target in motor impairment.
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Affiliation(s)
- L Melo-Thomas
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenbergstr. 18, 35032, Marburg, Germany; Instituto de Neurociências & Comportamento - INEC, Campus USP, Ribeirão Preto, SP, 14040-901, Brazil; Marburg Center for Mind, Brain, and Behavior (MCMBB), Hans-Meerwein-Straße 6, 35032 Marburg, Germany.
| | - A L Gil-Martínez
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain; Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, 30120 Murcia, Spain
| | - L Cuenca
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain; Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, 30120 Murcia, Spain
| | - C Estrada
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain; Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, 30120 Murcia, Spain
| | - A Gonzalez-Cuello
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain; Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, 30120 Murcia, Spain
| | - R K Schwarting
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenbergstr. 18, 35032, Marburg, Germany; Instituto de Neurociências & Comportamento - INEC, Campus USP, Ribeirão Preto, SP, 14040-901, Brazil
| | - M T Herrero
- Clinical and Experimental Neuroscience Group (NiCE-IMIB), Department of Human Anatomy and Psychobiology, Institute for Aging Research, School of Medicine, University of Murcia, Murcia, Spain; Biomedical Research Institute of Murcia (IMIB-Arrixaca), Campus of Health Sciences, University of Murcia, 30120 Murcia, Spain.
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Zorrilla B, Estrada C, Lasheras M, Sillero M, Martinez A, Aguirre R, Sanchez S, Jimenez E. Salta: a local community based intervention. Eur J Public Health 2016. [DOI: 10.1093/eurpub/ckw175.069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Hubert K, Johnson E, Estrada C, Diamond D, Maizels M. CEVL training for coronal/distal shaft hypospadias repair: a guide for attendings, residents, and OR staff. J Pediatr Urol 2015; 11:3-4. [PMID: 25818592 DOI: 10.1016/j.jpurol.2014.12.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 12/10/2014] [Indexed: 11/16/2022]
Affiliation(s)
- K Hubert
- Department of Urology, Boston Children's Hospital, Boston, MA, USA
| | - E Johnson
- Department of Urology, Boston Children's Hospital, Boston, MA, USA
| | - C Estrada
- Department of Urology, Boston Children's Hospital, Boston, MA, USA
| | - D Diamond
- Department of Urology, Boston Children's Hospital, Boston, MA, USA
| | - M Maizels
- Division of Urology, Lurie Children's Hospital, Chicago, IL, USA.
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Lavin L, Penrod C, Estrada C, Arnold D, Xu M, Saville B, Lowen D. 298 Infants With Fractures in the Pediatric Emergency Department: Are We Considering Child Physical Abuse? Ann Emerg Med 2014. [DOI: 10.1016/j.annemergmed.2014.07.325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Kane I, Abramo T, Crossman K, Meredith M, Estrada C, Chandrasekhar R, Wang W. Cerebral SO 2 Monitoring in Pediatric Altered Mental Status Patients. Ann Emerg Med 2013. [DOI: 10.1016/j.annemergmed.2013.07.298] [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: 11/25/2022]
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Szlam S, Abramo T, Estrada C, Walsh M, Pfeiffer A, Wang W, Saville B, Williams A, Bryd L. 69 Cerebral RSO2 Monitoring in Pediatric DKA Patients With Altered Mental Status Requiring 3% Hypertonic Saline Therapy in a Pediatric Emergency Department. Ann Emerg Med 2012. [DOI: 10.1016/j.annemergmed.2012.06.348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Chueh J, Kuhn A, Wilson S, Estrada C, Gounis M. O-017 Reduction in distal emboli with proximal flow control during mechanical thrombectomy: a quantitative in vitro study. J Neurointerv Surg 2012. [DOI: 10.1136/neurintsurg-2012-010455a.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Pope WH, Jacobs-Sera D, Russell DA, Peebles CL, Al-Atrache Z, Alcoser TA, Alexander LM, Alfano MB, Alford ST, Amy NE, Anderson MD, Anderson AG, Ang AAS, Ares M, Barber AJ, Barker LP, Barrett JM, Barshop WD, Bauerle CM, Bayles IM, Belfield KL, Best AA, Borjon A, Bowman CA, Boyer CA, Bradley KW, Bradley VA, Broadway LN, Budwal K, Busby KN, Campbell IW, Campbell AM, Carey A, Caruso SM, Chew RD, Cockburn CL, Cohen LB, Corajod JM, Cresawn SG, Davis KR, Deng L, Denver DR, Dixon BR, Ekram S, Elgin SCR, Engelsen AE, English BEV, Erb ML, Estrada C, Filliger LZ, Findley AM, Forbes L, Forsyth MH, Fox TM, Fritz MJ, Garcia R, George ZD, Georges AE, Gissendanner CR, Goff S, Goldstein R, Gordon KC, Green RD, Guerra SL, Guiney-Olsen KR, Guiza BG, Haghighat L, Hagopian GV, Harmon CJ, Harmson JS, Hartzog GA, Harvey SE, He S, He KJ, Healy KE, Higinbotham ER, Hildebrandt EN, Ho JH, Hogan GM, Hohenstein VG, Holz NA, Huang VJ, Hufford EL, Hynes PM, Jackson AS, Jansen EC, Jarvik J, Jasinto PG, Jordan TC, Kasza T, Katelyn MA, Kelsey JS, Kerrigan LA, Khaw D, Kim J, Knutter JZ, Ko CC, Larkin GV, Laroche JR, Latif A, Leuba KD, Leuba SI, Lewis LO, Loesser-Casey KE, Long CA, Lopez AJ, Lowery N, Lu TQ, Mac V, Masters IR, McCloud JJ, McDonough MJ, Medenbach AJ, Menon A, Miller R, Morgan BK, Ng PC, Nguyen E, Nguyen KT, Nguyen ET, Nicholson KM, Parnell LA, Peirce CE, Perz AM, Peterson LJ, Pferdehirt RE, Philip SV, Pogliano K, Pogliano J, Polley T, Puopolo EJ, Rabinowitz HS, Resiss MJ, Rhyan CN, Robinson YM, Rodriguez LL, Rose AC, Rubin JD, Ruby JA, Saha MS, Sandoz JW, Savitskaya J, Schipper DJ, Schnitzler CE, Schott AR, Segal JB, Shaffer CD, Sheldon KE, Shepard EM, Shepardson JW, Shroff MK, Simmons JM, Simms EF, Simpson BM, Sinclair KM, Sjoholm RL, Slette IJ, Spaulding BC, Straub CL, Stukey J, Sughrue T, Tang TY, Tatyana LM, Taylor SB, Taylor BJ, Temple LM, Thompson JV, Tokarz MP, Trapani SE, Troum AP, Tsay J, Tubbs AT, Walton JM, Wang DH, Wang H, Warner JR, Weisser EG, Wendler SC, Weston-Hafer KA, Whelan HM, Williamson KE, Willis AN, Wirtshafter HS, Wong TW, Wu P, Yang YJ, Yee BC, Zaidins DA, Zhang B, Zúniga MY, Hendrix RW, Hatfull GF. Expanding the diversity of mycobacteriophages: insights into genome architecture and evolution. PLoS One 2011; 6:e16329. [PMID: 21298013 PMCID: PMC3029335 DOI: 10.1371/journal.pone.0016329] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Accepted: 12/09/2010] [Indexed: 11/25/2022] Open
Abstract
Mycobacteriophages are viruses that infect mycobacterial hosts such as Mycobacterium smegmatis and Mycobacterium tuberculosis. All mycobacteriophages characterized to date are dsDNA tailed phages, and have either siphoviral or myoviral morphotypes. However, their genetic diversity is considerable, and although sixty-two genomes have been sequenced and comparatively analyzed, these likely represent only a small portion of the diversity of the mycobacteriophage population at large. Here we report the isolation, sequencing and comparative genomic analysis of 18 new mycobacteriophages isolated from geographically distinct locations within the United States. Although no clear correlation between location and genome type can be discerned, these genomes expand our knowledge of mycobacteriophage diversity and enhance our understanding of the roles of mobile elements in viral evolution. Expansion of the number of mycobacteriophages grouped within Cluster A provides insights into the basis of immune specificity in these temperate phages, and we also describe a novel example of apparent immunity theft. The isolation and genomic analysis of bacteriophages by freshman college students provides an example of an authentic research experience for novice scientists.
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Affiliation(s)
- Welkin H. Pope
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Deborah Jacobs-Sera
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Daniel A. Russell
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Craig L. Peebles
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Zein Al-Atrache
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Turi A. Alcoser
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Lisa M. Alexander
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Matthew B. Alfano
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Samantha T. Alford
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Nichols E. Amy
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - Marie D. Anderson
- Department of Biology, Spelman College, Atlanta, Georgia, United States of America
| | - Alexander G. Anderson
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Andrew A. S. Ang
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Manuel Ares
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Amanda J. Barber
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Lucia P. Barker
- Howard Hughes Medical Institute, Science Education Alliance, Chevy Chase, Maryland United States of America
| | - Jonathan M. Barrett
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - William D. Barshop
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Cynthia M. Bauerle
- Department of Biology, Spelman College, Atlanta, Georgia, United States of America
| | - Ian M. Bayles
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Katherine L. Belfield
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Aaron A. Best
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Agustin Borjon
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Charles A. Bowman
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Christine A. Boyer
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Kevin W. Bradley
- Howard Hughes Medical Institute, Science Education Alliance, Chevy Chase, Maryland United States of America
| | - Victoria A. Bradley
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - Lauren N. Broadway
- Department of Biology, University of Louisiana at Monroe, Monroe, Louisiana, United States of America
| | - Keshav Budwal
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Kayla N. Busby
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Ian W. Campbell
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Anne M. Campbell
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Alyssa Carey
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Steven M. Caruso
- Department of Biological Sciences, University of Maryland, Baltimore, Maryland, United States of America
| | - Rebekah D. Chew
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Chelsea L. Cockburn
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - Lianne B. Cohen
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Jeffrey M. Corajod
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Steven G. Cresawn
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - Kimberly R. Davis
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Lisa Deng
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Dee R. Denver
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Breyon R. Dixon
- Department of Biology, Spelman College, Atlanta, Georgia, United States of America
| | - Sahrish Ekram
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Sarah C. R. Elgin
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Angela E. Engelsen
- Department of Biology, University of Louisiana at Monroe, Monroe, Louisiana, United States of America
| | - Belle E. V. English
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Marcella L. Erb
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Crystal Estrada
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Laura Z. Filliger
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Ann M. Findley
- Department of Biology, University of Louisiana at Monroe, Monroe, Louisiana, United States of America
| | - Lauren Forbes
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Mark H. Forsyth
- Biology Department, College of William & Mary, Williamsburg, Virginia, United States of America
| | - Tyler M. Fox
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Melissa J. Fritz
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Roberto Garcia
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Zindzi D. George
- Department of Biology, Spelman College, Atlanta, Georgia, United States of America
| | - Anne E. Georges
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | | | - Shannon Goff
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Rebecca Goldstein
- Department of Biological Sciences, University of Maryland, Baltimore, Maryland, United States of America
| | - Kobie C. Gordon
- Biology Department, College of William & Mary, Williamsburg, Virginia, United States of America
| | - Russell D. Green
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - Stephanie L. Guerra
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Krysta R. Guiney-Olsen
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Bridget G. Guiza
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Leila Haghighat
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Garrett V. Hagopian
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Catherine J. Harmon
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Jeremy S. Harmson
- Department of Biology, University of Louisiana at Monroe, Monroe, Louisiana, United States of America
| | - Grant A. Hartzog
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Samuel E. Harvey
- Biology Department, College of William & Mary, Williamsburg, Virginia, United States of America
| | - Siping He
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Kevin J. He
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Kaitlin E. Healy
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Ellen R. Higinbotham
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Erin N. Hildebrandt
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Jason H. Ho
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Gina M. Hogan
- Department of Biology, University of Louisiana at Monroe, Monroe, Louisiana, United States of America
| | - Victoria G. Hohenstein
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Nathan A. Holz
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Vincent J. Huang
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Ericka L. Hufford
- Department of Biology, University of Louisiana at Monroe, Monroe, Louisiana, United States of America
| | - Peter M. Hynes
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Arrykka S. Jackson
- Biology Department, College of William & Mary, Williamsburg, Virginia, United States of America
| | - Erica C. Jansen
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Jonathan Jarvik
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Paul G. Jasinto
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Tuajuanda C. Jordan
- Howard Hughes Medical Institute, Science Education Alliance, Chevy Chase, Maryland United States of America
| | - Tomas Kasza
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Murray A. Katelyn
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - Jessica S. Kelsey
- Department of Biological Sciences, University of Maryland, Baltimore, Maryland, United States of America
| | - Larisa A. Kerrigan
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Daryl Khaw
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Junghee Kim
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Justin Z. Knutter
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Ching-Chung Ko
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Gail V. Larkin
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Jennifer R. Laroche
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Asma Latif
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Kohana D. Leuba
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Sequoia I. Leuba
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Lynn O. Lewis
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Kathryn E. Loesser-Casey
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Courtney A. Long
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - A. Javier Lopez
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Nicholas Lowery
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Tina Q. Lu
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Victor Mac
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Isaac R. Masters
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - Jazmyn J. McCloud
- Department of Biology, Spelman College, Atlanta, Georgia, United States of America
| | - Molly J. McDonough
- Biology Department, College of William & Mary, Williamsburg, Virginia, United States of America
| | - Andrew J. Medenbach
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Anjali Menon
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Rachel Miller
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Brandon K. Morgan
- Department of Biology, University of Louisiana at Monroe, Monroe, Louisiana, United States of America
| | - Patrick C. Ng
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Elvis Nguyen
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Katrina T. Nguyen
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Emilie T. Nguyen
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Kaylee M. Nicholson
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Lindsay A. Parnell
- Department of Biology, Spelman College, Atlanta, Georgia, United States of America
| | - Caitlin E. Peirce
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Allison M. Perz
- Biology Department, College of William & Mary, Williamsburg, Virginia, United States of America
| | - Luke J. Peterson
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Rachel E. Pferdehirt
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Seegren V. Philip
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - Kit Pogliano
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Joe Pogliano
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Tamsen Polley
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Erica J. Puopolo
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Hannah S. Rabinowitz
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Michael J. Resiss
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Corwin N. Rhyan
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Yetta M. Robinson
- Department of Biology, Spelman College, Atlanta, Georgia, United States of America
| | - Lauren L. Rodriguez
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Andrew C. Rose
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Jeffrey D. Rubin
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Jessica A. Ruby
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Margaret S. Saha
- Biology Department, College of William & Mary, Williamsburg, Virginia, United States of America
| | - James W. Sandoz
- Department of Biological Sciences, University of Maryland, Baltimore, Maryland, United States of America
| | - Judith Savitskaya
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Dale J. Schipper
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | | | - Amanda R. Schott
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - J. Bradley Segal
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Christopher D. Shaffer
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Kathryn E. Sheldon
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Erica M. Shepard
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Jonathan W. Shepardson
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Madav K. Shroff
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Jessica M. Simmons
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Erika F. Simms
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Brandy M. Simpson
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Kathryn M. Sinclair
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - Robert L. Sjoholm
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Ingrid J. Slette
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Blaire C. Spaulding
- Department of Biology, Spelman College, Atlanta, Georgia, United States of America
| | - Clark L. Straub
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Joseph Stukey
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Trevor Sughrue
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Tin-Yun Tang
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Lyons M. Tatyana
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - Stephen B. Taylor
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - Barbara J. Taylor
- Department of Zoology, Oregon State University, Corvallis, Oregon, United States of America
| | - Louise M. Temple
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - Jasper V. Thompson
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Michael P. Tokarz
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Stephanie E. Trapani
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - Alexander P. Troum
- Department of Biology, James Madison University, Harrisonburg, Virginia, United States of America
| | - Jonathan Tsay
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Anthony T. Tubbs
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Jillian M. Walton
- Biology Department, College of William & Mary, Williamsburg, Virginia, United States of America
| | - Danielle H. Wang
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Hannah Wang
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - John R. Warner
- Department of Biology, University of Louisiana at Monroe, Monroe, Louisiana, United States of America
| | - Emilie G. Weisser
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Samantha C. Wendler
- Department of Biological Sciences, University of Mary Washington, Fredericksburg, Virginia, United States of America
| | - Kathleen A. Weston-Hafer
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Hilary M. Whelan
- Biology Department, College of William & Mary, Williamsburg, Virginia, United States of America
| | - Kurt E. Williamson
- Biology Department, College of William & Mary, Williamsburg, Virginia, United States of America
| | - Angelica N. Willis
- Biology Department, A. Paul Schaap Science Center, Hope College, Holland, Michigan, United States of America
| | - Hannah S. Wirtshafter
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Theresa W. Wong
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Phillip Wu
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Yun jeong Yang
- Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Brandon C. Yee
- Biological Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - David A. Zaidins
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Bo Zhang
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Melina Y. Zúniga
- Department of Biology, Spelman College, Atlanta, Georgia, United States of America
| | - Roger W. Hendrix
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Graham F. Hatfull
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- * E-mail:
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Martinez A, Tovar G, Estrada C, Esperon E, Romo S. 149 AN INEXPENSIVE LABORATORY PRACTICE TO TEACH EMBRYO COLLECTION AND TRANSFER. Reprod Fertil Dev 2011. [DOI: 10.1071/rdv23n1ab149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The objective of this work is to describe a hands-on laboratory session for surgical embryo collection and transfer using rabbits as a model. Rabbits are characterised for their low purchase price, easy handling, and low maintenance, thus allowing their use as a tool for embryo transfer teaching and for its potential application in other species, such as the bovine, ovine, and caprine. These are important reasons in countries where the use of low-cost techniques and animal models is a must. Two females of the New Zealand breed were used as donors and one female of the Chinchilla breed was used as recipient. All females were healthy and multiparous. Three days after receiving natural service by a male, the donors were anesthetized (by injection of xylazine hydrochloride, 1.1 mg kg–1 IM, then sodium pentobarbital, 30 mg kg–1 IV), and ovariohysterectomy surgery was performed on each one. Each uterine horn was flushed 3 times with Ringer’s lactate (Hartmann) solution. Using a stereoscopic microscope, we searched for embryos and then placed them in a Petri dish for evaluation and selection. Once selected, embryos were moved to a 6-well dish containing 0.5 mL of a commercially available holding solution and washed 3 times. Twenty-one grades 1, 2, and 3 embryos were recovered and evaluated, showing developmental stages 1 to 6, according to IETS. The recipient female was anesthetized, and by laparotomy, her uterine horns were exteriorized to transfer a total of 15 grade 1 embryos with development stages 4 to 6. Pregnancy diagnosis was performed by real-time ultrasound on Days 10 and 20 post-transfer, with positive results. The transferred embryos induced a 34-day pregnancy, including 3 days of embryo development within the donors. Parturition was normal and without problems; 2 live offspring were born, with normal weight and size. The technique, used for teaching purposes, was successfully performed by 3 graduate students directed by 2 professors. The use of rabbits as a teaching model was efficient and the total cost of the laboratory practice was low, as compared with the use of other domestic species. The handling of the females and their offspring was easy, the feeding costs were low, and the practical laboratory session was fulfilled. It is proposed that the rabbit species be used for teaching surgical embryo collection and transfer to graduate and undergraduate students in underdeveloped and developing countries, where low-cost teaching models are of the utmost importance.
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Jiménez J, Balparda J, Castrillón D, Díaz S, Echeverri J, Estrada C, Lopera C, Raigosa M, Vásquez L. Characterization of hospital-acquired infections in a University Hospital in Colombia: January 2005 - July 2009. Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.2066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Gómez L, Estrada C, Gómez I, Márquez M, Estany C, Martí JM, Bastús R, Cirera L, Quintana S, Garau J. Low-dose beta-lactam plus amikacin in febrile neutropenia: cefepime vs. piperacillin/tazobactam, a randomized trial. Eur J Clin Microbiol Infect Dis 2010; 29:417-27. [PMID: 20195673 DOI: 10.1007/s10096-010-0879-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2009] [Accepted: 01/05/2010] [Indexed: 11/28/2022]
Abstract
Patients with fever and granulocytopenia are at risk of developing severe infection. We performed a prospective, randomized trial to evaluate the efficacy of low-dose cefepime plus amikacin (C-A) compared to low-dose piperacillin/tazobactam plus amikacin (PT-A). Patients received cefepime (2 g/12 h) plus amikacin (15 mg/kg/day) or piperacillin/tazobactam (4 g/500 mg/8 h) plus amikacin. A total of 317 episodes of febrile granulocytopenia in 190 patients were studied (152 in the C-A group, 165 in the PT-A group). A microbiologically documented infection was present in 53 (35%) episodes in the C-A group and 41 (25%) episodes in the PT-A group (p = ns); a clinically documented infection was observed in 39 (26%) and 47 (28%) episodes, respectively. Toxicity was observed in 6 (4%) episodes in the C-A group and in 5 (3%) episodes in the PT-A group. The antibiotic success rate (no change or addition of antibiotics) was recorded in 89 (59%) and 105 (64%) cases, respectively (p = ns). Mortality related to infection was similar in each arm (3.9% vs. 3.6%). Combination therapy of low-dose beta-lactam with an aminoglycoside achieves very good response rates and low rates of toxicity. It might be an attractive option in an environment of increasing resistance among gram-negative bacteria.
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Affiliation(s)
- L Gómez
- Infectious Diseases Unit, Hospital Universitari Mutua de Terrassa, University of Barcelona, Terrassa, Barcelona, Spain.
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Delmo Walter EM, Sill B, Sales V, Martin D, Rusk E, Emani S, Estrada C, Hetzer R, Mayer J. In vivo implantation of a functional tissue engineered stentless pulmonary valve using bone-marrow-derived mesenchymal stem cells and circulating endothelial progenitor cells. Thorac Cardiovasc Surg 2010. [DOI: 10.1055/s-0029-1247003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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Ogrinc G, Mooney SE, Estrada C, Foster T, Goldmann D, Hall LW, Huizinga MM, Liu SK, Mills P, Neily J, Nelson W, Pronovost PJ, Provost L, Rubenstein LV, Speroff T, Splaine M, Thomson R, Tomolo AM, Watts B. The SQUIRE (Standards for QUality Improvement Reporting Excellence) guidelines for quality improvement reporting: explanation and elaboration. Qual Saf Health Care 2008; 17 Suppl 1:i13-32. [PMID: 18836062 PMCID: PMC2602740 DOI: 10.1136/qshc.2008.029058] [Citation(s) in RCA: 282] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
As the science of quality improvement in health care advances, the importance of sharing its accomplishments through the published literature increases. Current reporting of improvement work in health care varies widely in both content and quality. It is against this backdrop that a group of stakeholders from a variety of disciplines has created the Standards for QUality Improvement Reporting Excellence, which we refer to as the SQUIRE publication guidelines or SQUIRE statement. The SQUIRE statement consists of a checklist of 19 items that authors need to consider when writing articles that describe formal studies of quality improvement. Most of the items in the checklist are common to all scientific reporting, but virtually all of them have been modified to reflect the unique nature of medical improvement work. This "Explanation and Elaboration" document (E & E) is a companion to the SQUIRE statement. For each item in the SQUIRE guidelines the E & E document provides one or two examples from the published improvement literature, followed by an analysis of the ways in which the example expresses the intent of the guideline item. As with the E & E documents created to accompany other biomedical publication guidelines, the purpose of the SQUIRE E & E document is to assist authors along the path from completion of a quality improvement project to its publication. The SQUIRE statement itself, this E & E document, and additional information about reporting improvement work can be found at http://www.squire-statement.org.
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Affiliation(s)
- G Ogrinc
- Dartmouth Institute for Health Policy and Clinical Practice, Dartmouth Medical School, VT 05009, USA.
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Estrada C, Perez AM, Turmond MC. Herd Reproduction Ratio and Time-Space Analysis of a Foot-and-mouth Disease Epidemic in Peru in 2004. Transbound Emerg Dis 2008; 55:284-92. [DOI: 10.1111/j.1865-1682.2008.01023.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Dubé C, Stevenson MA, Garner MG, Sanson RL, Corso BA, Harvey N, Griffin J, Wilesmith JW, Estrada C. A comparison of predictions made by three simulation models of foot-and-mouth disease. N Z Vet J 2007; 55:280-8. [DOI: 10.1080/00480169.2007.36782] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Salazar A, Estrada C, Porta R, Lolo M, Tomas S, Alvarez M. 208. Ann Emerg Med 2006. [DOI: 10.1016/j.annemergmed.2006.07.664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Rugeles MT, Rincón B, Rugeles C, Montoya CJ, Hernández M, Estrada C, Olivares MM, Patiño PJ. Normal expression of IFN-gammaR in four patients with uncommon mycobacterial infection phenotypes. Braz J Med Biol Res 2004; 37:1353-63. [PMID: 15334201 DOI: 10.1590/s0100-879x2004000900010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Several primary immunodeficiency diseases affecting the interleukin 12/interferon gamma (IFN-gamma) pathway have been identified, most of them characterized by recurrent and protracted infections produced by intracellular microorganisms, particularly by several species of mycobacteria. In the present study we analyzed the expression of IFN-gamma receptor (IFN-gammaR) and signal transducer and activator of transcription 1 (STAT-1) in 4 children with Mycobacterium tuberculosis infection of uncommon clinical presentation. These molecules were evaluated by flow cytometry and Western blotting in B cells transformed with Epstein-Barr virus and mutations were scanned by single-strand conformational polymorphisms and DNA sequencing. The expression of IFN-gammaR1 was normal in all 4 patients. The genetic analysis of IFN-gammaR1 and IFN-gammaR2 coding sequences did not reveal any mutation. The expression of the STAT-1 molecule was similar in patients and healthy controls; however, when the phosphorylation of this transcription factor in response to IFN-gamma activation was evaluated by Western blot, a significant lower signal was evident in one patient. These data indicate that there are no alterations in the expression or function of the IFN-gammaR chains in these patients. However, the low level of STAT-1 phosphorylation found in one of these patients might be explained by a defect in one of the molecules involved in the signal transduction pathway after IFN-gamma interacts with its receptor. In the other three patients the inability to eliminate the mycobacteria may be due to a defect in another effector mechanism of the mononuclear phagocytes.
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Affiliation(s)
- M T Rugeles
- Grupos de Inmunodeficiencias Primarias, Facultad de Medicina, Corporación Biogénesis, Universidad de Antioquia, Medellín, Columbia
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Abstract
Ecological divergence can cause speciation if adaptive traits have pleiotropic effects on mate choice. In Heliconius butterflies, mimetic patterns play a role in mate detection between sister species, as well as signalling to predators. Here we show that male butterflies from four recently diverged parapatric populations of Heliconius melpomene are more likely to approach and court their own colour patterns as compared with those of other races. A few exceptions, where males were more attracted to patterns other than their own, suggest that some mimetic patterns are sub-optimal in mate choice. Genotype frequencies in hybrid zones between races of H. melpomene suggest that mating is random, so reinforcement is unlikely to have played a role in intra-specific divergence. In summary, co-evolved divergence of colour pattern and mate preference occurs rapidly and is likely the first step in Heliconius speciation.
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Affiliation(s)
- C D Jiggins
- Smithsonian Tropical Research Institute, Apartado, Balboa, República de Panamá.
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Fernandez Noda EI, Rivera Luna H, Perez Fernandez J, Castillo J, Perez Izquierdo M, Estrada C. New concept regarding chest pain due to hypoxia of the internal mammary arteries in more than 1,600 operated patients with cerebral thoracic neurovascular syndrome (CTNVS). Panminerva Med 2002; 44:47-59. [PMID: 11887092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
In this article we describe the role of compression of the vertebral, subclavian, internal mammary, internal carotid arteries, brachial plexus and coiling and kinking of the vertebral and basilar arteries, the faulty irrigation of blood supply and oxygen of the cerebellum and basal ganglia and other areas of the brain followed by metabolic processes. Among the effects are: a decrease in the secretion of dopamine at the level of the putamen, which produces the symptoms of symptomatic Parkinson's disease, chorea due to chronic transitory faulty blood supply and oxygen to the caudate nucleus, ballism by hypoxia at the level of sub-thalamic and thalamus nuclei and athetosis in the lenticular nucleus. This compression is caused by hypertrophy of the anterior scalenus muscles and the cervical ribs at the level of the vertebrae C6-C7; by the sternocleidomastoid at the level of the cervical atlas, by the pectoralis minor muscles and coiling and kinking of the vertebral, basilar and the internal carotid arteries. The decreased blood supply to the cerebellum and basal ganglia is the cause of the cerebral thoracic neuro vascular syndrome (CTNVS) and its neurological complications, among which are ipsilateral paralysis, symptomatic Parkinson's disease, functional Alzheimer's disease multiple sclerosis and others. We are presently engaged in genetic studies to widen our understanding of these illness.
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Moreno-López B, Escudero M, De Vente J, Estrada C. Morphological identification of nitric oxide sources and targets in the cat oculomotor system. J Comp Neurol 2001; 435:311-24. [PMID: 11406814 DOI: 10.1002/cne.1032] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Nitric oxide (NO) production by specific neurons in the prepositus hypoglossi (PH) nucleus is necessary for the correct performance of eye movements in alert cats. In an attempt to characterize the morphological substrate of this NO function, the distribution of nitrergic neurons and NO-responding neurons has been investigated in different brainstem structures related to eye movements. Nitrergic neurons were stained by either immunohistochemistry for NO synthase I or histochemistry for reduced nicotinamide adenine dinucleotide phosphate (NADPH) diaphorase. The NO targets were identified by cyclic guanosine monophosphate (cGMP) immunohistochemistry in animals treated with a NO donor immediately before fixation of the brain. Connectivity between cells of the NO-cGMP pathway was analyzed by injections of the retrograde tracers horseradish peroxidase or fast blue in different structures. The motor nuclei commanding extraocular muscles did not contain elements of the NO-cGMP pathway, except for some scattered nitrergic neurons in the most caudal part of the abducens nucleus. The PH nucleus contained the largest number of nitrergic cell bodies and a rich neuropil, distributed in two groups in medial and lateral positions in the caudal part, and one central group in the rostral part of the nucleus. An abundant cGMP positive neuropil was the only NO-sensitive element in the PH nucleus, where no cGMP-producing neuronal cell bodies were observed. The opposite disposition was found in the marginal zone between the PH and the medial vestibular nuclei, with a large number of NO-sensitive cGMP-producing neurons and almost no nitrergic cells. Both nitrergic and NO-sensitive cell bodies were found in the medial and inferior vestibular nuclei and in the superior colliculus, whereas the lateral geniculate nucleus contained nitrergic neuropil and a large number of NO-sensitive cell bodies. Some of the cGMP-positive neurons in the marginal zone and medial vestibular nucleus projected to the PH nucleus, predominantly to the ipsilateral side. These morphological findings may help to explain the mechanism of action of NO in the oculomotor system.
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Affiliation(s)
- B Moreno-López
- Area de Fisiología, Facultad de Medicina, Universidad de Cádiz, Plaza Fragela 9, 11003 Cádiz, Spain
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Abstract
The subventricular zone (SVZ) of the adult mouse brain retains the capacity to generate new neurons from stem cells. The neuronal precursors migrate tangentially along the rostral migratory stream (RMS) towards the olfactory bulb, where they differentiate as periglomerular and granular interneurons. In this study, we have investigated whether nitric oxide (NO), a signaling molecule in the nervous system with a role in embryonic neurogenesis, may be produced in the proximity of the progenitor cells in the adult brain, as a prerequisite to proposing a functional role for NO in adult neurogenesis. Proliferating and immature precursor cells were identified by immunohistochemistry for bromo-deoxyuridine (BrdU) and PSA-NCAM, respectively, and nitrergic neurons by either NADPH-diaphorase staining or immunohistochemical detection of neuronal NO synthase (NOS I). Nitrergic neurons with long varicose processes were found in the SVZ, intermingled with chains of cells expressing PSA-NCAM or containing BrdU. Neurons with similar characteristics surrounded the RMS all along its caudo-rostral extension as far as the core of the olfactory bulb. No expression of NOS I by precursor cells was detected either in the proliferation or in the migration zones. Within the olfactory bulb, many small cells in the granular layer and around the glomeruli expressed either PSA-NCAM or NOS I and, in some cases, both markers. Colocalization was also found in a few isolated cells at a certain distance from the neurogenesis areas. The anatomical disposition shown indicates that NO may be released close enough to the neuronal progenitors to allow a functional influence of this messenger in adult neurogenesis.
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Affiliation(s)
- B Moreno-López
- Area de Fisiología, Facultad de Medicina, Universidad de Cádiz, Plaza Fragela 9, 11003, Cádiz, Spain
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Pablo Casas J, López AM, Abbona HL, Robles AM, Estrada C. [Non invasive ventilation in acute respiratory insufficiency: an alternative]. Medicina (B Aires) 1999; 58:707-12. [PMID: 10347963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Abstract
UNLABELLED Effectiveness of non invasive positive pressure ventilation (NIPPV) was prospectively evaluated in 22 selected patients with acute respiratory failure, meeting criteria for orotracheal intubation and conventional mechanical ventilation. Patients were divided in two groups: group A (17 patients) with initial PaCO2 above 45 mm Hg and group B (5 patients) with initial PaCO2 below 45 mmHg. NIPPV was administered with 2 levels of pressure either by nasal or facial mask. Respiratory rate (RR), arterial blood pH, PaCO2 and PaO2/FiO2 were registered pretreatment, 1 hour and 24 hours after NIPPV. Statistical analysis was performed by ANOVA test, p < 0.05 was considered significant. RESULTS In group A there was a reduction in RR (X +/- DS) from 31.2 +/- 8.2 to 24.7 +/- 8.2 at one hour (h) (p = 0.02) and to 23.4 +/- 6.5 at 24 hs (p = 0.01), pH change from 7.33 +/- 0.07 to 7.37 +/- 0.07 at one hour (p = 0.13) and to 7.40 +/- 0.07 at 24 hs (p = 0.01), a PaCO2 change from 69.5 +/- 19.6 to 57.8 +/- 16.9 at one hour (p = 0.06) and to 54 +/- 13 at 24 hs (p = 0.02), and PaO2/FiO2 change from 187.3 +/- 60.2 to 223.9 +/- 6.5 at one hour (p = 0.12) and to 245.8 +/- 75 at 24 hs (p = 0.03). In group B there was a change in RR from 33 +/- 16.3 to 26.6 +/- 12.5 at one hour (p = 0.46) and to 21.3 +/- 4.2 at 24 hs (p = 0.27), PaO2/FiO2 change from 113.4 +/- 31 to 137.8 +/- 57.2 at one hour (p = 0.44) and to 208.7 +/- 51.2 at 24 hs (p = 0.03). Only two patients in group A and one in group B were converted to conventional ARM. CONCLUSION 1) NIPPV is a therapeutic alternative for selective patients with acute respiratory insufficiency and may reduce known morbidity of conventional mechanical ventilation. 2) In the group with hypercapnic acute respiratory failure the improvement in respiratory function begins with an immediate reduction in RR. Significant improvement in arterial blood gases usually occurs within 24 hours of NIPPV.
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Affiliation(s)
- J Pablo Casas
- Servicio de Neumonología y Terapia Intensiva, Hospital Privado, Centro Médico de Córdoba, Argentina
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Moreno-López B, Estrada C, Escudero M. Mechanisms of action and targets of nitric oxide in the oculomotor system. J Neurosci 1998; 18:10672-9. [PMID: 9852602 PMCID: PMC6793333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
Nitric oxide (NO) production by neurons in the prepositus hypoglossi (PH) nucleus is necessary for the normal performance of eye movements in alert animals. In this study, the mechanism(s) of action of NO in the oculomotor system has been investigated. Spontaneous and vestibularly induced eye movements were recorded in alert cats before and after microinjections in the PH nucleus of drugs affecting the NO-cGMP pathway. The cellular sources and targets of NO were also studied by immunohistochemical detection of neuronal NO synthase (NOS) and NO-sensitive guanylyl cyclase, respectively. Injections of NOS inhibitors produced alterations of eye velocity, but not of eye position, for both spontaneous and vestibularly induced eye movements, suggesting that NO produced by PH neurons is involved in the processing of velocity signals but not in the eye position generation. The effect of neuronal NO is probably exerted on a rich cGMP-producing neuropil dorsal to the nitrergic somas in the PH nucleus. On the other hand, local injections of NO donors or 8-Br-cGMP produced alterations of eye velocity during both spontaneous eye movements and vestibulo-ocular reflex (VOR), as well as changes in eye position generation exclusively during spontaneous eye movements. The target of this additional effect of exogenous NO is probably a well defined group of NO-sensitive cGMP-producing neurons located between the PH and the medial vestibular nuclei. These cells could be involved in the generation of eye position signals during spontaneous eye movements but not during the VOR.
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Affiliation(s)
- B Moreno-López
- Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain
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Estrada C. Acetaminophen and risk factors for excess anticoagulation with warfarin. JAMA 1998; 280:695; author reply 697. [PMID: 9728628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Estrada C, DeFelipe J. Nitric oxide-producing neurons in the neocortex: morphological and functional relationship with intraparenchymal microvasculature. Cereb Cortex 1998; 8:193-203. [PMID: 9617914 DOI: 10.1093/cercor/8.3.193] [Citation(s) in RCA: 123] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Nitric oxide is a ubiquitous intercellular messenger involved in particular functions in the cardiovascular, immunological and nervous systems. In the cerebral cortex, nitric oxide is synthetized by endothelial cells and by a discrete population of neurons and glial cells expressing nitric oxide synthase. Nitric oxide of endothelial and neuronal origin is involved in the regulation of cerebral blood flow. In this review, we have tried to combine morphological data providing information on the chemical nature of nitric oxide synthase-containing neurons and their arrangement, especially in relation to intracortical blood vessels, with functional results suggesting the participation of these neurons in the coupling between local cortical blood flow and synaptic activity.
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Affiliation(s)
- C Estrada
- Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma, Madrid, Spain
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Renta JY, Cadilla CL, Vega ME, Hillyer GV, Estrada C, Jiménez E, Abreu E, Méndez I, Gandía J, Meléndez-Guerrero LM. Longitudinal studies on maternal HIV-1 variants by biological phenotyping, sequence analysis and viral load. Cell Mol Biol (Noisy-le-grand) 1997; 43:1097-114. [PMID: 9449544] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In this study, the HIV-1 variant viruses from ten pregnant women and their infants were isolated and characterized longitudinally in order to determine the role that viral envelope (gp120-V3 loop) gene variation and viral tropism play in vertical transmission. Biological phenotyping of each HIV variant was accomplished by growth in MT-2, and macrophages from healthy and non-HIV-infected donors. Genetic characterization of the variants was accomplished by DNA sequence analysis. All the women enrolled in this study received ZDV therapy. Virus was cultured from eight out of ten env V3-PCR positive mothers. HIV-1 isolates were all non-syncitium inducing variants. None of the mothers were found to transmit HIV, as determined by DNA PCR and quantitative co-cultures on their infants which were seronegative for HIV-1 through one year after birth. Viral cultures from infant blood samples were negative and infants were all healthy. However, nested env V3-PCR detected proviral DNA in five out of ten infants. In contrast, conventional gag-PCR was negative in the same five infants. Sequences of the five maternal-infant pairs were different, suggesting unique infant HIV-1 variants. The three highest maternal viral load values corresponded to infants that were env V3-PCR positive. These results suggest that HIV-1 particles are transmitted from ZDV-treated mothers to infants. Infant follow up is recommended to determine if HIV-1 has been inhibited by the immune system of the infants.
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Affiliation(s)
- J Y Renta
- Department of Microbiology and Medical Zoology, University of Puerto Rico School of Medicine, San Juan 00936-5067, USA
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González C, Barroso C, Martín C, Gulbenkian S, Estrada C. Neuronal nitric oxide synthase activation by vasoactive intestinal peptide in bovine cerebral arteries. J Cereb Blood Flow Metab 1997; 17:977-84. [PMID: 9307611 DOI: 10.1097/00004647-199709000-00007] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The participation of nitric oxide and vasoactive intestinal peptide (VIP) in the neurogenic regulation of bovine cerebral arteries was investigated. Nitrergic nerve fibers and ganglion-like groups of neurons were revealed by NADPH-diaphorase staining in the adventitial layer of bovine cerebral arteries. NADPH diaphorase also was present in endothelial cells but not in the smooth muscle layer. Double immunolabeling for neuronal nitric oxide synthase and VIP indicated that both molecules co-localized in the same nerve fibers in these vessels. Transmural nerve stimulation (200 mA, 0.2 milliseconds, 1 to 8 Hz) of endothelium-denuded bovine cerebral artery rings precontracted with prostaglandin F2 alpha, produced tetrodotoxin-sensitive relaxations that were completely suppressed by NG-nitro-L-arginine methyl ester (L-NAME) and by the guanylyl cyclase inhibitor 1H-[1,2,4]oxadiazolo[4,3-a]quinoxaline (ODQ), but were not affected by the adenylyl cyclase inhibitor 9-(tetrahydro-2-furanyl)-9H-purin-6-amine (SQ 22,536), nor by VIP tachyphylaxis induced by pretreatment with 1 mumol/L VIP. Transmural nerve stimulation also elicited increases in intracellular cyclic GMP concentration, which were prevented by L-NAME, and small decreases in intracellular cyclic AMP concentration. Addition of VIP to bovine cerebral artery rings without endothelium produced a concentration-dependent relaxation that was partially inhibited by L-NAME, ODQ, and SQ 22,536. The effects of L-NAME and SQ 22,536 were additive. VIP induced a transient increase in intracellular cyclic GMP concentration, which was maximal 1 minute after VIP addition, when the highest relaxation rate was observed, and which was blocked by L-NAME. It is concluded that nitric oxide produced by perivascular neurons and nerve fibers fully accounts for the experimental neurogenic relaxation of bovine cerebral arteries and that VIP, which also is present in the same perivascular fibers, acts as a neuromodulator by activating neuronal nitric oxide synthase.
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Affiliation(s)
- C González
- Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, Spain
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Estrada C, Gómez C, Martín-Nieto J, De Frutos T, Jiménez A, Villalobo A. Nitric oxide reversibly inhibits the epidermal growth factor receptor tyrosine kinase. Biochem J 1997; 326 ( Pt 2):369-76. [PMID: 9291107 PMCID: PMC1218680 DOI: 10.1042/bj3260369] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Although it has been demonstrated that NO inhibits the proliferation of different cell types, the mechanisms of its anti-mitotic action are not well understood. In this work we have studied the possible interaction of NO with the epidermal growth factor receptor (EGFR), using transfected fibroblasts which overexpress the human EGFR. The NO donors S-nitroso-N-acetylpenicillamine (SNAP), 1,1-diethyl-2-hydroxy-2-nitrosohydrazine (DEA-NO) and N-{4-[1-(3-aminopropyl)-2-hydroxy-2-nitrosohydrazino]butyl}propane -1, 3-diamine (DETA-NO) inhibited DNA synthesis of fibroblasts growing in the presence of fetal calf serum, epidermal growth factor (EGF) or EGF plus insulin, as assessed by [methyl-3H]thymidine incorporation. Neither 8-bromo-cGMP nor the cGMP-phosphodiesterase inhibitor zaprinast mimicked this effect, suggesting that NO is unlikely to inhibit cell proliferation via a cGMP-dependent pathway. SNAP, DEA-NO and DETA-NO also inhibited the transphosphorylation of the EGFR and its tyrosine kinase activity toward the exogenous substrate poly-l-(Glu-Tyr), as measured in permeabilized cells using [gamma-32P]ATP as phosphate donor. In contrast, 3-[morpholinosydnonimine hydrochloride] (SIN-1), a peroxynitrite-forming compound, did not significantly inhibit either DNA synthesis or the EGFR tyrosine kinase activity. The inhibitory action of DEA-NO on the EGFR tyrosine kinase was prevented by haemoglobin, an NO scavenger, but not by superoxide dismutase, and was reversed by dithiothreitol. The binding of EGF to its receptor was unaffected by DEA-NO. The inhibitory action of DEA-NO on the EGF-dependent transphosphorylation of the receptor was also demonstrated in intact cells by immunoblot analysis using an anti-phosphotyrosine antibody. Taken together, these results suggest that NO, but not peroxynitrite, inhibits in a reversible manner the EGFR tyrosine kinase activity by S-nitrosylation of the receptor.
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Affiliation(s)
- C Estrada
- Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, Spain
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Scatena FN, Moya S, Estrada C, Chinea JD. The First Five Years in the Reorganization of Aboveground Biomass and Nutrient Use Following Hurricane Hugo in the Bisley Experimental Watersheds, Luquillo Experimental Forest, Puerto Rico. Biotropica 1996. [DOI: 10.2307/2389086] [Citation(s) in RCA: 160] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Moreno-López B, Escudero M, Delgado-Garcia JM, Estrada C. Nitric oxide production by brain stem neurons is required for normal performance of eye movements in alert animals. Neuron 1996; 17:739-45. [PMID: 8893030 DOI: 10.1016/s0896-6273(00)80205-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Although nitric oxide (NO) is produced by discrete groups of neurons in the brain, participation of NO in premotor structures directly involved in reflexively evoked, sensory-motor functions has not been demonstrated so far. We now show that NO is a physiological mediator in the generation of a specific motor response in alert behaving animals. In the oculomotor system, numerous neurons expressing nitric oxide synthase (NOS) are located in the prepositus hypoglossi, a nucleus involved in the control of horizontal eye movements. Unilateral inhibition of NOS within this nucleus results in severe ocular nystagmus with slow phases directed to the contralateral side. Accordingly, local increases of NO or cyclic GMP produced a nystagmus in the opposite direction. It is concluded that a balanced production of NO by prepositus hypoglossi neurons is a necessary condition for the normal performance of eye movements in alert animals.
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Affiliation(s)
- B Moreno-López
- Departamento de Fisiología y Biología Animal, Facultad de Biología, Universidad de Sevilla, Spain
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37
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Abstract
1. We investigated the vascular effects of agmatine (decarboxylated arginine), an endogenous ligand for alpha 2-adrenoceptors and non-adrenoceptor imidazoline (I-) receptors, present in endothelium, smooth muscle and plasma, using the rat tail artery as a model. 2. While by itself agmatine (10 nM-1 mM) was without effect on isolated arterial rings, at the highest concentration used (1 mM) it slightly increased EC50 values for contractions elicited respectively by the alpha 1- and alpha 2- adrenoceptor agonists methoxamine and clonidine. 3. Agmatine (0.03-1 mM) produced a concentration-dependent transient inhibition of the contractions induced by transmural nerve stimulation (TNS; 200 mA, 0.2 ms, 1 Hz, 10 s). This effect was abolished by the alpha 2-adrenoceptor antagonists, rawolscine and idazoxan. 4. In the presence of rawolscine or idazoxan, agmatine produced a concentration-dependent delayed facilitation of TNS-induced contractions, which was prevented by cocaine. 5. Neither inhibitory nor potentiating actions were produced by agmatine on contractions induced by noradrenaline (NA) administration. 6. Agmatine did not directly affect [3H]-NA uptake in bovine cultured chromaffin cells. 7. Agmatine can regulate vascular function by two opposing actions at sympathetic nerve terminals, with different latencies: a transient inhibition of NA release mediated by prejunctional alpha 2-adrenoceptors and a cocaine-sensitive delayed facilitation the mechanism of which is undetermined at present. 8. The results reveal the existence of a novel endogenous amine modulating NA release in the perivascular sympathetic terminals.
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Affiliation(s)
- C González
- Department of Physiology, Facultad de Medicina, Universidad Autónoma de Madrid, Spain
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Delgado-Martínez AD, Estrada C, Rodríguez-Merchán EC, Atienza M, Ordóñez JM. CT scanning of the patellofemoral joint. The quadriceps relaxed or contracted? Int Orthop 1996; 20:159-62. [PMID: 8832318 DOI: 10.1007/s002640050054] [Citation(s) in RCA: 18] [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: 02/02/2023]
Abstract
A study of the patellofemoral joint in patients with patellofemoral pain has been carried out in 14 patients (18 knees) to compare CT scans with the knee extended fully and the quadriceps muscle contracted or relaxed. The purpose was to decide whether both examinations are necessary in young adults with suspected patellar malalignment. The patients were selected randomly. Thirteen knees were also examined in 20 degrees of flexion. The lateral patellar angle and the lateral patellar shift were measured. Linear regression analysis showed a proportional relationship between measurement with the quadriceps contracted and relaxed. Therefore, only one examination is needed and is easier to carry out in the relaxed state. Radiation to the patient and costs are reduced.
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Ben-Menachem T, Estrada C, Young MJ, Peethambaram P, Krol G, Scher EJ, Lesch M. Balancing service and education: improving internal medicine residencies in the managed care era. Am J Med 1996; 100:224-9. [PMID: 8629659 DOI: 10.1016/s0002-9343(97)89463-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Internal medicine training programs must adapt to health care systems faced with balancing the competitive priorities of patient-care responsibilities and educational needs. OBJECTIVE To evaluated the effects of a major organizational change on the inpatient service of an internal medicine residency program in a vertically integrated health system. METHODS We changed the structure of our program from a system in which the hospitalized patients' primary physicians were responsible for daily inpatient management, while teaching was assigned to a defined teaching rounder, to a method in which the rounding attending was responsible for both teaching and patient care. Measurements before and after the change in the rounding system included: the McGill University clinical tutor evaluations, time-motion observations of house staff, patient satisfaction surveys, average length of stay data, and physician focus groups to assess physician satisfaction. RESULTS The rounding attendings consistently received excellent to superior ratings by the house staff both before and after the implemented change. Compared to time-motion observations performed before the change, observations recorded after the change suggested that a greater percent of house staff time was spent on educational activities. The responses of patient satisfaction surveys indicated that the perception of quality of care remained high after the system change. Lastly, the average length of stay for patients on the general internal medicine and subspecialty services was reduced from 7.6 days before the change to 6.6 days after the change, a difference of 0.92 day (95% confidence interval 1.3 to 0.6, P < 0.001). CONCLUSIONS Through organizational restructuring, it is possible to improve the quality of patient care and improving the efficiency of patient-care management.
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Affiliation(s)
- T Ben-Menachem
- Department of Internal Medicine, Henry Ford Health System, Detroit, MI 48202, USA
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Estrada C, Gómez C, Martín C. Effects of TNF-alpha on the production of vasoactive substances by cerebral endothelial and smooth muscle cells in culture. J Cereb Blood Flow Metab 1995; 15:920-8. [PMID: 7593352 DOI: 10.1038/jcbfm.1995.117] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The effects of tumor necrosis factor-alpha (TNF-alpha) on the production of the vasoactive substances nitric oxide (NO) and endothelin-1 (ET-1) were investigated in cerebrovascular cells in culture. Bovine cerebral endothelial cells (BCEC) stained positively for NADPH-diaphorase/NO synthase activity and spontaneously produced nitrite, a stable NO oxidation product, which accumulated in the culture medium in a linear way for 48 h. Low concentrations of TNF-alpha (0.5-2 ng/ml) significantly enhanced nitrite production after a 24-h incubation. Higher concentrations or longer exposure times resulted in a cytotoxic effect that altered cell morphology, released lactate dehydrogenase (LDH) to the culture medium, and reduced the protein content. Dexamethasone, but not the NO synthase inhibitor N-iminoethyl-L-ornithine (L-NIO), prevented the cytotoxic effect of TNF-alpha in BCEC. TNF-alpha also significantly enhanced nitrite production in bovine cerebral smooth muscle cells (BCSMC). The enhancement was detected at all times between 8 and 72 h and at all concentrations tested (2-100 ng/ml). Signs of cytotoxicity were not observed in BCSMC after incubation with TNF-alpha. ET-1 was constitutively secreted by BCEC. The production of ET-1 was stimulated by thrombin. TNF-alpha enhanced the release of ET-1 in BCEC, and this enhancement was not modified by the simultaneous addition of interferon-gamma (IFN-gamma). BCSMC did not produce ET-1, either spontaneously or in the presence of TNF-alpha, IFN-gamma, or of both together.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- C Estrada
- Department of Physiology, Faculty of Medicine, Universidad Autónoma de Madrid, Spain
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41
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Petitta A, Kaatz S, Estrada C, Effendi A, Anandan JV. The transition to medication system performance indicators. Top Hosp Pharm Manage 1995; 14:20-6. [PMID: 10140425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Economic and competitive pressures in the health care market are causing hospitals and other health care providers to seek more effective ways to improve the quality of care and to decrease costs. Integrating total quality management and continuous quality improvement techniques into traditional drug use evaluation methodology allows for the development of critical performance indicators. These indicators integrate the selection, use, delivery methods, and outcomes of drug therapy with other operational therapeutic modalities. The article describes the development of medication system performance indicators using heparin dosing as a model.
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Affiliation(s)
- A Petitta
- Henry Ford Hospital, Detroit, MI 48202
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Mena MA, Casarejos MJ, Estrada C, de Yebenes JG. Effects of retinoic acid on NB 69 human neuroblastoma cells and fetal rat mid brain neurons. J Neural Transm Park Dis Dement Sect 1994; 8:85-97. [PMID: 7893379 DOI: 10.1007/bf02250919] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Retinoids are chemical compounds which play important roles in ontogenetic development and cranio-caudal differentiation in animals, but their effect on phenotypic expression of neurotransmitters are unknown. We studied the pharmacological and morphological effects of retinoic acid (RA) on two types of immature vertebrate neurons, the human derived neuroblastoma cells, NB69, and fetal rat mid brain neurons in culture. The pharmacological effects of RA on the cultures and their relation to catecholamine and acetylcholine neurotransmission were evaluated according the levels of catecholamines, tyrosine hydroxylase (TH) activity, TH immunostaining, and choline acetyltransferase (CAT) activity, respectively. RA reduces catecholamine levels and TH activity in NB69 cells and the number of dopamine neurons in cultures derived from rat fetal mid brain. The detrimental effect of RA on mid brain neurons is dose- dependent; limited to TH+ cells at low concentrations (100 to 500 nM) and toxic for all types of cells at high concentrations (1 to 2 microM). RA increases CAT activity in NB 69 cells and produces phenotypic differentiation of these to a more mature neuronal phenotype with more prolonged neurite extensions. Therefore, RA may play a trophic positive role in the differentiation of immature cells to cholinergic neurons; this contrasts with the detrimental effects of RA on catecholamine neurons.
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Affiliation(s)
- M A Mena
- Departamento de Investigacion, Centro Ramon y Cajal, Facultad de Medicina, Universidad Autónoma de Madrid, Spain
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Estrada C, Mengual E, González C. Local NADPH-diaphorase neurons innervate pial arteries and lie close or project to intracerebral blood vessels: a possible role for nitric oxide in the regulation of cerebral blood flow. J Cereb Blood Flow Metab 1993; 13:978-84. [PMID: 8408322 DOI: 10.1038/jcbfm.1993.122] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Electrical stimulation of perivascular nerves induced a relaxation of endothelium-denuded cat pial arteries that was significantly reduced by nitric oxide (NO) synthase inhibition, indicating that NO was involved in the neurogenic relaxation of these vessels. Histochemical staining of the pial arteries for NADPH-diaphorase (NADPH-d), used as a marker for NO synthase, showed positive nerve fibers in the adventitial layer. Interestingly, in some restricted areas stained neuronal cell bodies were also observed. These neurons were scattered or distributed in small groups in a ganglion-like manner, and they sent fibers to the vessel wall. No NADPH-d-positive nerve fibers or cell bodies were detected in forelimb, pulmonary, or coronary arteries. Within the brain parenchyma, blood vessels also showed positive fibers around their walls. These fibers were organized in a branching pattern and presented varicosities. NADPH-d-positive neurons were found in the proximity of the intracerebral vascular profiles, sending processes to the vessels and/or being directly apposed to their wall. The neurovascular contacts were preferentially located close to the interface between the cerebral cortex and white matter. The anatomical relationship between NADPH-d-positive neurons and fibers and the cerebral blood vessels, together with the participation of NO in the neurogenic relaxation of pial arteries, suggests that NO is involved in the regulation of cerebral blood flow.
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Affiliation(s)
- C Estrada
- Department of Physiology, School of Medicine, Universidad Autónoma de Madrid, Spain
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44
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Abstract
The choline analogue ethylcholine mustard aziridinium (AF64A) is a potent and irreversible inhibitor of choline uptake in brain synaptosomes and is used as a neurotoxin to produce animal models of cholinergic hypofunction. However, previous studies have shown that intraocular administration of AF64A in rats not only reduced the number of cholinergic neurons in the retina, but also induced ultrastructural alterations in the microvasculature. The purpose of this study was to investigate whether AF64A has a direct cytotoxic effect on endothelial cells. As revealed by the measurement of lactate dehydrogenase activity in the culture medium, AF64A produced similar concentration-dependent cellular damage in cultures of bovine cerebral endothelial cells and in the human cholinergic neuroblastoma cell line SK-N-MC, but not in bovine cerebral smooth muscle cells. The toxic effect of AF64A correlated well with the affinity of the choline transport system detected in each cell type. The effect of the toxin on endothelial cells was mediated by its interaction with the endothelial cell choline carrier, as demonstrated by the following observations: (a) AF64A inhibited [3H]choline uptake in a concentration-dependent manner in both cultured and freshly isolated cerebral endothelial cells, and (b) the addition of choline or hemicholinium-3 to the culture medium prevented the AF64A-induced toxicity in endothelial cell cultures.
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Affiliation(s)
- C Gómez
- Department of Physiology, School of Medicine, Universidad Autónoma de Madrid, Spain
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45
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Abstract
In physiological conditions, there is a net transport of choline from brain to blood, despite the fact that the choline concentration is higher in plasma than in CSF. Because of the blood-brain barrier characteristics, such passage against the concentration gradient takes place necessarily through endothelial cells. To get a better understanding of this phenomenon, [3H]choline uptake properties have been analyzed in capillaries isolated from bovine brain. [3H]Choline uptake was linear with time for up to 1 h. Nonlinear regression analysis of the uptake rates at different substrate concentrations gave the best fit to a system of two components, one of which was saturable (Km = 17.8 +/- 4.8 microM; Vmax = 11.3 +/- 3.4 pmol/min/mg of protein) and the other of which was nonsaturable at concentrations up to 200 microM. The [3H]choline transport was significantly reduced in the absence of sodium and after incubation with 10(-4) M ouabain for 30 min. Ouabain also inhibited choline uptake in purified cerebral endothelial cells, but not in the endothelium isolated from bovine aorta. Accordingly, cerebral endothelial cells were able to concentrate [3H]choline, with this effect being abolished by ouabain, whereas in aortic endothelial cells the [3H]choline intracellular concentration was never higher than that of the incubation medium. These results suggest that the blood-brain barrier endothelium is specifically provided with an energy-dependent choline transport system, which may explain the choline efflux from the brain and the maintenance of a low choline concentration in the cerebral extracellular space.
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Affiliation(s)
- E Galea
- Department of Physiology, School of Medicine, Universidad Autónoma de Madrid, Spain
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46
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Gonzalez C, Fernandez A, Martin C, Moncada S, Estrada C. Nitric oxide from endothelium and smooth muscle modulates responses to sympathetic nerve stimulation: implications for endotoxin shock. Biochem Biophys Res Commun 1992; 186:150-6. [PMID: 1632764 DOI: 10.1016/s0006-291x(05)80787-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The influence of nitric oxide (NO) on vascular responses to transmural stimulation (TNS) of noradrenergic nerves was studied in isolated rings of rat iliac arteries. TNS produced frequency-dependent contractions in all vessels. The NO synthase inhibitor NG-monomethyl-L-arginine (L-NMMA) significantly enhanced TNS responses in intact vessels, but not in those in which the endothelium had been removed. However, in endothelium-denuded rings incubated for 8 hours, L-NMMA increased the contractions induced by nerve stimulation, an effect which was prevented by treatment with dexamethasone or cycloheximide, and enhanced by incubation with lipopolysaccharide and gamma-interferon. Addition of L-arginine reversed the effect of L-NMMA in intact rings; however, it significantly decreased below control values TNS-induced contractions in vessels without endothelium. The results indicate that a) the arterial response to noradrenergic nerve stimulation is modulated by NO originating either in endothelial cells or in smooth muscle cells after induction of NO synthase activity, and b) once NO synthase is induced, the limiting step in NO production is the availability of the substrate L-arginine. An overproduction of vascular NO in the presence of endotoxin or other inflammatory stimuli may prevent the vascular response to sympathetic stimuli and contribute to the vasodilation observed in inflammation or endotoxic shock.
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Affiliation(s)
- C Gonzalez
- Department of Physiology, School of Medicine, Universidad Autonoma de Madrid, Spain
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47
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Estrada C, Gómez C, Martín C, Moncada S, González C. Nitric oxide mediates tumor necrosis factor-alpha cytotoxicity in endothelial cells. Biochem Biophys Res Commun 1992; 186:475-82. [PMID: 1378728 DOI: 10.1016/s0006-291x(05)80832-0] [Citation(s) in RCA: 99] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Tumor necrosis factor alpha (TNF-alpha) exerts multiple actions on endothelial cells including among others the expression of pro-coagulant activity and adhesion molecules, and secretion of cytokines. We now show that TNF-alpha induces a time- and dose-dependent cytotoxic effect on cultured bovine aortic endothelial cells. This TNF-induced cytotoxicity, which is preceded by increased production of nitric oxide (NO), is significantly decreased by the NO synthase inhibitor N-iminoethyl-L-ornithine (L-NIO). Dexamethasone, which prevents the expression of cytokine-induced NO synthase in endothelial cells, also inhibits TNF-alpha-dependent cytotoxicity. The results indicate that NO is involved in the cytotoxic effect of TNF-alpha on endothelial cells.
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Affiliation(s)
- C Estrada
- Department of Physiology, School of Medicine, Universidad Autonoma de Madrid, Spain
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48
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Abstract
Choline acetyltransferase (ChAT) activity is present in isolated cerebral capillaries, where it has been considered to be a marker for perivascular cholinergic nerve terminals. However, ChAT-like immunoreactivity has been visualized in endothelial cells. This finding raised the possibility that at least part of the biochemically detected ChAT has a nonneuronal origin. To evaluate the relative contribution of endothelial cells and nerve fibers to the total acetylcholine (ACh)-synthesizing capacity of cerebral capillaries, ChAT activity and ACh release were measured in capillaries and in purified endothelial cells isolated from bovine cerebral cortex. Isolated capillaries showed ChAT activity, which was inhibited by 2-benzoylethyl trimethylammonium to the same extent as cerebral ChAT. When preincubated with [3H]choline, these capillaries presented a calcium-dependent enhancement in tritium release upon electrical field stimulation. Purified endothelial cells had minor ChAT activity and lacked the ability to release tritium in response to electrical stimulation, although the endothelial markers alkaline phosphatase, gamma-glutamyltranspeptidase, and 1,1'-dioctadecyl-1,3,3',3'-tetramethyl-iodocarbocyanide perchlorate-labeled acetylated low-density lipoprotein uptake were fully preserved. These data indicate that, within isolated cerebral capillaries, ACh is synthesized and released by a periendothelial structure. The fact that ACh release is provoked by electrical stimulation and by a calcium-dependent mechanism strongly suggests that cerebrovascular ACh has a neuronal origin.
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Affiliation(s)
- E Galea
- Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, Spain
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49
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Galea E, Fernández-Shaw C, Triguero D, Estrada C. Choline acetyltransferase activity associated with cerebral cortical microvessels does not originate in basal forebrain neurons. J Cereb Blood Flow Metab 1991; 11:875-8. [PMID: 1874821 DOI: 10.1038/jcbfm.1991.148] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Cerebral cortical microvessels are innervated by cholinergic fibers that are probably involved in the regulation of local cerebral blood flow and blood-brain barrier permeability. The possibility exists that the cholinergic terminals associated with the cortical microvasculature belong to neurons from the nucleus basalis magnocellularis (NBM), where 70% of the cortical cholinergic projections originate. To test this hypothesis, ibotenic acid (25 nmol) was injected unilaterally in the NBM in rats, and 14 days later, choline acetyltransferase (ChAT) activity was measured in the frontoparietal cortex and in a blood vessel fraction isolated from this region. Lesions of the NBM resulted in a 50% decrease of cortical ChAT as compared with control or sham-operated hemispheres; however, no changes were observed in the ChAT activity associated with cortical microvessels. These results indicate that, in rat cerebral cortex, the perivascular cholinergic terminals do not originate in the basal forebrain.
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Affiliation(s)
- E Galea
- Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, Spain
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50
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Abstract
Nitric oxide (NO) is a mediator of the vasodilation induced by a variety of physiological and pharmacological stimuli. The possible role of NO in the relaxation elicited in cerebral arteries by perivascular nerve stimulation has been investigated. Electrical field stimulation of precontracted bovine cerebral arteries induced a relaxation that was blocked by tetrodotoxin, but not by adrenergic or muscarinic receptor antagonists, suggesting the existence of noradrenergic, noncholinergic dilator nerves, as has been shown in other species. The relaxation was significantly reduced by the inhibitors of NO synthesis, NG-monomethyl-L-arginine and nitro-L-arginine methyl ester, but not by the enantiomer, NG-monomethyl-D-arginine. Such a reduction was reversed by L-arginine. In addition, transmural nerve stimulation (TNS)-induced relaxation was potentiated by superoxide dismutase. No response to TNS was observed in arteries without endothelium. These results suggested that neurogenic relaxation of bovine cerebral arteries is mediated by endothelium-derived NO.
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Affiliation(s)
- C González
- Department of Physiology, School of Medicine, Universidad Autónoma de Madrid, Spain
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