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Nykänen AI, Mariscal A, Duong A, Ali A, Takahagi A, Bai X, Zehong G, Joe B, Takahashi M, Chen M, Gokhale H, Shan H, Hwang DM, Estrada C, Yeung J, Waddell T, Martinu T, Juvet S, Cypel M, Liu M, Davies JE, Keshavjee S. Lung Transplant Immunomodulation with Genetically Engineered Mesenchymal Stromal Cells-Therapeutic Window for Interleukin-10. Cells 2024; 13:859. [PMID: 38786082 DOI: 10.3390/cells13100859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Revised: 05/05/2024] [Accepted: 05/09/2024] [Indexed: 05/25/2024] Open
Abstract
Lung transplantation results are compromised by ischemia-reperfusion injury and alloimmune responses. Ex vivo lung perfusion (EVLP) is used to assess marginal donor lungs before transplantation but is also an excellent platform to apply novel therapeutics. We investigated donor lung immunomodulation using genetically engineered mesenchymal stromal cells with augmented production of human anti-inflammatory hIL-10 (MSCsIL-10). Pig lungs were placed on EVLP for 6 h and randomized to control (n = 7), intravascular delivery of 20 × 106 (n = 5, low dose) or 40 × 106 human MSCs IL-10 (n = 6, high dose). Subsequently, single-lung transplantation was performed, and recipient pigs were monitored for 3 days. hIL-10 secretion was measured during EVLP and after transplantation, and immunological effects were assessed by cytokine profile, T and myeloid cell characterization and mixed lymphocyte reaction. MSCIL-10 therapy rapidly increased hIL-10 during EVLP and resulted in transient hIL-10 elevation after lung transplantation. MSCIL-10 delivery did not affect lung function but was associated with dose-related immunomodulatory effects, with the low dose resulting in a beneficial decrease in apoptosis and lower macrophage activation, but the high MSCIL-10 dose resulting in inflammation and cytotoxic CD8+ T cell activation. MSCIL-10 therapy during EVLP results in a rapid and transient perioperative hIL-10 increase and has a therapeutic window for its immunomodulatory effects.
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Affiliation(s)
- Antti I Nykänen
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Andrea Mariscal
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
- Division of Thoracic Surgery, Department of Surgery, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5T 1P5, Canada
- Toronto Lung Transplant Program, Ajmera Transplant Centre, University Health Network, Toronto, ON M5G 2N2, Canada
| | - Allen Duong
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Aadil Ali
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Akihiro Takahagi
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Xiaohui Bai
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Guan Zehong
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Betty Joe
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Mamoru Takahashi
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Manyin Chen
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Toronto Lung Transplant Program, Ajmera Transplant Centre, University Health Network, Toronto, ON M5G 2N2, Canada
| | - Hemant Gokhale
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Toronto Lung Transplant Program, Ajmera Transplant Centre, University Health Network, Toronto, ON M5G 2N2, Canada
| | - Hongchao Shan
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Toronto Lung Transplant Program, Ajmera Transplant Centre, University Health Network, Toronto, ON M5G 2N2, Canada
| | - David M Hwang
- Laboratory Medicine and Molecular Diagnostics, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON M4N 3M5, Canada
| | | | - Jonathan Yeung
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
- Division of Thoracic Surgery, Department of Surgery, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5T 1P5, Canada
- Toronto Lung Transplant Program, Ajmera Transplant Centre, University Health Network, Toronto, ON M5G 2N2, Canada
| | - Tom Waddell
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
- Division of Thoracic Surgery, Department of Surgery, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5T 1P5, Canada
- Toronto Lung Transplant Program, Ajmera Transplant Centre, University Health Network, Toronto, ON M5G 2N2, Canada
| | - Tereza Martinu
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
- Division of Thoracic Surgery, Department of Surgery, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5T 1P5, Canada
- Division of Respirology, Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Stephen Juvet
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
- Division of Thoracic Surgery, Department of Surgery, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5T 1P5, Canada
- Division of Respirology, Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Marcelo Cypel
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
- Division of Thoracic Surgery, Department of Surgery, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5T 1P5, Canada
- Toronto Lung Transplant Program, Ajmera Transplant Centre, University Health Network, Toronto, ON M5G 2N2, Canada
| | - Mingyao Liu
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - John E Davies
- Tissue Regeneration Therapeutics, Toronto, ON M5G 1N8, Canada
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada
| | - Shaf Keshavjee
- Latner Thoracic Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, ON M5G 1L7, Canada
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
- Division of Thoracic Surgery, Department of Surgery, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5T 1P5, Canada
- Toronto Lung Transplant Program, Ajmera Transplant Centre, University Health Network, Toronto, ON M5G 2N2, Canada
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2
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Rougemont Q, Huber B, Martin S, Whibley A, Estrada C, Solano D, Orpet R, McMillan WO, Frérot B, Joron M. Subtle introgression footprints at the end of the speciation continuum in a clade of Heliconius butterflies. Mol Biol Evol 2023:msad166. [PMID: 37467472 PMCID: PMC10375063 DOI: 10.1093/molbev/msad166] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 05/24/2023] [Accepted: 07/10/2023] [Indexed: 07/21/2023] Open
Abstract
Quantifying gene flow between lineages at different stages of the speciation continuum is central to understanding speciation. Heliconius butterflies have undergone an adaptive radiation in wing colour patterns driven partly by natural selection for local mimicry. Colour patterns are also known to be used as assortative mating cues. Therefore, wing pattern divergence is considered to play a role in speciation. A corollary is that mimicry between closely-related species may be associated with hybridization and interfere with reproductive isolation. Here, we take a multifaceted approach to explore speciation history, species boundaries, and traits involved in species differentiation between the two closely-related species H. hecale and H. ismenius. We focus on geographic regions where the two species mimic each other, and contrast this with geographic regions where they do not mimic each other. To examine population history and patterns of gene flow, we tested and compared a four-population model accounting for linked selection. This model suggests that the two species have remained isolated for a large part of their history, yet with a small amount of gene exchange. Accordingly, signatures of genomic introgression were small except at a major wing pattern allele and chemosensing genes, and stronger in the mimetic populations compared to non-mimetic populations. Behavioural assays confirm that visual confusion exists but that short-range cues determine strong sexual isolation. Tests for chemical differentiation between species identified major differences in putative pheromones which likely mediate mate choice and the maintenance of species differences.
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Affiliation(s)
- Quentin Rougemont
- Centre d'Ecologie Fonctionnelle et Evolutive, Univ Montpellier, CNRS, EPHE, IRD, Montpellier, France
| | - Bárbara Huber
- Institut de Systématique, Evolution et Biodiversité, Muséum National d'Histoire Naturelle, Paris, France
- Smithsonian Tropical Research Institute, Balboa, Panama
- Instituto de Ciencias Ambientales y Ecológicas (ICAE), Universidad de Los Andes, Mérida, Venezuela
| | - Simon Martin
- Department of Zoology, University of Cambridge, United Kingdom
| | - Annabel Whibley
- Institut de Systématique, Evolution et Biodiversité, Muséum National d'Histoire Naturelle, Paris, France
| | - Catalina Estrada
- Smithsonian Tropical Research Institute, Balboa, Panama
- Department of Life Sciences, Imperial College London, Silwood Park, London, UK
| | - Darha Solano
- Smithsonian Tropical Research Institute, Balboa, Panama
| | - Robert Orpet
- Smithsonian Tropical Research Institute, Balboa, Panama
- Department of Entomology, Washington State University, Wenatchee, Washington, USA
| | | | - Brigitte Frérot
- INRAE, CNRS, IRD, UPEC, Sorbonne Université, Institute of Ecology and Environmental Sciences of Paris, Université de Paris, 78000 Versailles, France
| | - Mathieu Joron
- Centre d'Ecologie Fonctionnelle et Evolutive, Univ Montpellier, CNRS, EPHE, IRD, Montpellier, France
- Institut de Systématique, Evolution et Biodiversité, Muséum National d'Histoire Naturelle, Paris, France
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Chik HYJ, Estrada C, Wang Y, Tank P, Lord A, Schroeder J. Individual variation in reaction norms but no directional selection in reproductive plasticity of a wild passerine population. Ecol Evol 2022; 12:e8582. [PMID: 35222960 PMCID: PMC8844119 DOI: 10.1002/ece3.8582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 01/07/2022] [Indexed: 11/08/2022] Open
Abstract
In the plant–insect–insectivorous bird food chain, directional changes in climate can result in mismatched phenology, potentially affecting selection pressures. Phenotypic plasticity in the timing of breeding, characterized by reaction norm slopes, can help maximize fitness when faced with earlier prey emergence. In temperate passerines, the timing of tree budburst influences food availability for chicks through caterpillar phenology and the resulting food abundance patterns. Thus, the timing of tree budburst might serve as a more direct proxy for the cue to time egg‐laying. The evolutionary potential of breeding plasticity relies on heritable variation, which is based upon individual variation, yet studies on individual variation in plasticity are few. Here, we tested for the laying date—budburst date and the clutch size—laying date reaction norms, and examined 1) the among‐individual variance in reaction norm intercepts and slopes; and 2) the selection differentials and gradients on these intercepts and slopes. Using long‐term data of oak (genus Quercus) budburst and blue tit (Cyanistes caeruleus) reproduction, we applied within‐subject centering to detect reaction norms, followed by bivariate random regression to quantify among‐individual variance in reaction norm properties and their covariance with fitness. Individuals significantly differed in intercepts and slopes of both laying date—budburst date and clutch size—laying date reaction norms, and directional selection was present for an earlier laying date and a larger clutch size (intercepts), but not on plasticity (slopes). We found that individuals have their own regimes for adjusting egg‐laying and clutch size. This study provides further support of individual variation of phenotypic plasticity in birds.
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Affiliation(s)
| | | | - Yiqing Wang
- Department of Life Sciences Imperial College London Ascot UK
| | - Priyesha Tank
- Department of Life Sciences Imperial College London Ascot UK
| | - Alex Lord
- Department of Life Sciences Imperial College London Ascot UK
| | - Julia Schroeder
- Department of Life Sciences Imperial College London Ascot UK
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4
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Nykänen AI, Mariscal A, Duong A, Estrada C, Ali A, Hough O, Sage A, Chao BT, Chen M, Gokhale H, Shan H, Bai X, Zehong G, Yeung J, Waddell T, Martinu T, Juvet S, Cypel M, Liu M, Davies JE, Keshavjee S. Engineered mesenchymal stromal cell therapy during human lung ex vivo lung perfusion is compromised by acidic lung microenvironment. Mol Ther Methods Clin Dev 2021; 23:184-197. [PMID: 34703841 PMCID: PMC8516994 DOI: 10.1016/j.omtm.2021.05.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 05/07/2021] [Indexed: 11/29/2022]
Abstract
Ex vivo lung perfusion (EVLP) is an excellent platform to apply novel therapeutics, such as gene and cell therapies, before lung transplantation. We investigated the concept of human donor lung engineering during EVLP by combining gene and cell therapies. Premodified cryopreserved mesenchymal stromal cells with augmented anti-inflammatory interleukin-10 production (MSCIL-10) were administered during EVLP to human lungs that had various degrees of underlying lung injury. Cryopreserved MSCIL-10 had excellent viability, and they immediately and efficiently elevated perfusate and lung tissue IL-10 levels during EVLP. However, MSCIL-10 function was compromised by the poor metabolic conditions present in the most damaged lungs. Similarly, exposing cultured MSCIL-10 to poor metabolic, and especially acidic, conditions decreased their IL-10 production. In conclusion, we found that "off-the-shelf" MSCIL-10 therapy of human lungs during EVLP is safe and feasible, and results in rapid IL-10 elevation, and that the acidic target-tissue microenvironment may compromise the efficacy of cell-based therapies.
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Affiliation(s)
- Antti I Nykänen
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Andrea Mariscal
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Allen Duong
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Catalina Estrada
- Tissue Regeneration Therapeutics, 790 Bay Street, Toronto, ON M5G 1N8, Canada
| | - Aadil Ali
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Olivia Hough
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Andrew Sage
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Bonnie T Chao
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Manyin Chen
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Hemant Gokhale
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Hongchao Shan
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Xiaohui Bai
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Guan Zehong
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Jonathan Yeung
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Tom Waddell
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Tereza Martinu
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Stephen Juvet
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Marcelo Cypel
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Mingyao Liu
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - John E Davies
- Institute of Biomedical Engineering, University of Toronto, 164 College St, Toronto, ON M5S 3G9, Canada
| | - Shaf Keshavjee
- Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network and University of Toronto, 101 College Street, Toronto, ON M5G 1L7, Canada
- Institute of Biomedical Engineering, University of Toronto, 164 College St, Toronto, ON M5S 3G9, Canada
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5
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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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6
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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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7
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Woelke JB, Fursov VN, Gumovsky AV, de Rijk M, Estrada C, Verbaarschot P, Huigens ME, Fatouros NE. Description and biology of two new egg parasitoid species (Hymenoptera: Trichogrammatidae) reared from eggs of Heliconiini butterflies (Lepidoptera: Nymphalidae: Heliconiinae) in Panama. J NAT HIST 2019. [DOI: 10.1080/00222933.2019.1606360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Jozef B. Woelke
- Laboratory of Entomology, Wageningen University & Research, Wageningen, the Netherlands
- Business Unit Greenhouse Horticulture, Wageningen University & Research, Bleiswijk, the Netherlands
| | - Viktor N. Fursov
- Schmalhausen Institute of Zoology, National Academy of Sciences of Ukraine, Kiev, Ukraine
| | - Alex V. Gumovsky
- Schmalhausen Institute of Zoology, National Academy of Sciences of Ukraine, Kiev, Ukraine
| | - Marjolein de Rijk
- Laboratory of Entomology, Wageningen University & Research, Wageningen, the Netherlands
- Education Support Centre, Wageningen University & Research, Wageningen, the Netherlands
| | | | - Patrick Verbaarschot
- Laboratory of Entomology, Wageningen University & Research, Wageningen, the Netherlands
- Biosystematics group, Wageningen University & Research, Wageningen, the Netherlands
| | - Martinus E. Huigens
- Laboratory of Entomology, Wageningen University & Research, Wageningen, the Netherlands
- Education Institute, Wageningen University & Research, Wageningen, the Netherlands
| | - Nina E. Fatouros
- Laboratory of Entomology, Wageningen University & Research, Wageningen, the Netherlands
- Biosystematics group, Wageningen University & Research, Wageningen, the Netherlands
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8
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Hamidian Jahromi S, Estrada C, Li Y, Cheng E, Davies JE. Human Umbilical Cord Perivascular Cells and Human Bone Marrow Mesenchymal Stromal Cells Transplanted Intramuscularly Respond to a Distant Source of Inflammation. Stem Cells Dev 2018; 27:415-429. [PMID: 29402203 DOI: 10.1089/scd.2017.0248] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Intravenously administered mesenchymal stromal cells (MSCs) are rapidly entrapped in the lungs, where they display an anti-inflammatory phenotype. Intramuscular (IM) delivery provides an increased MSC dwell-time, which could result in a sustained modulation of an inflammatory milieu. We studied the therapeutic effects of IM delivered MSCs to treat a distant (contralateral) inflammation, and compared the efficacy of neonatal (umbilical cord) and adult bone marrow MSCs (BMMSCs). Inflammation decreased over 48 h, but neonatal cells showed an earlier response than BMMSCs. Tumor necrosis factor-induced gene-6 (TSG-6) was released at the site of MSC delivery, while neutrophil infiltration was abrogated and inflammation reduced at the contralateral site. MSCs did not distribute to the organs or to the site of inflammation. Thus, IM delivery presents a promising alternative for the treatment of inflammation, and neonatal MSCs may represent a stronger candidate than those derived from adult BM to treat inflammatory diseases.
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Affiliation(s)
- Shiva Hamidian Jahromi
- 1 Institute of Biomaterials and Biomedical Engineering (IBBME), University of Toronto , Toronto, Canada .,2 Faculty of Dentistry, University of Toronto , Toronto, Canada
| | | | - Yunqing Li
- 3 Tissue Regeneration Therapeutics, Inc. , Toronto, Canada
| | - Elaine Cheng
- 3 Tissue Regeneration Therapeutics, Inc. , Toronto, Canada
| | - John E Davies
- 1 Institute of Biomaterials and Biomedical Engineering (IBBME), University of Toronto , Toronto, Canada .,2 Faculty of Dentistry, University of Toronto , Toronto, Canada
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9
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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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10
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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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11
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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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12
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13
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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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14
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Vencl FV, Ottens K, Dixon MM, Candler S, Bernal XE, Estrada C, Page RA. Pyrazine emission by a tropical firefly: An example of chemical aposematism? Biotropica 2016. [DOI: 10.1111/btp.12336] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Fredric V. Vencl
- Ecology and Evolution Stony Brook University Stony Brook NY 11794‐5245 U.S.A
- Smithsonian Tropical Research Institute Apartado 0843‐03092 Balboa Ancón Republic of Panamá
| | - Kristina Ottens
- Smithsonian Tropical Research Institute Apartado 0843‐03092 Balboa Ancón Republic of Panamá
| | - Marjorie M. Dixon
- Smithsonian Tropical Research Institute Apartado 0843‐03092 Balboa Ancón Republic of Panamá
| | - Sarah Candler
- Biological Sciences Texas Tech University Lubbock TX 47906 U.S.A
| | - Ximena E. Bernal
- Smithsonian Tropical Research Institute Apartado 0843‐03092 Balboa Ancón Republic of Panamá
- Biological Sciences Purdue University West Lafayette IN 47907 U.S.A
| | - Catalina Estrada
- Smithsonian Tropical Research Institute Apartado 0843‐03092 Balboa Ancón Republic of Panamá
| | - Rachel A. Page
- Smithsonian Tropical Research Institute Apartado 0843‐03092 Balboa Ancón Republic of Panamá
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15
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Fernández-Marín H, Nash DR, Higginbotham S, Estrada C, van Zweden JS, d'Ettorre P, Wcislo WT, Boomsma JJ. Functional role of phenylacetic acid from metapleural gland secretions in controlling fungal pathogens in evolutionarily derived leaf-cutting ants. Proc Biol Sci 2016; 282:20150212. [PMID: 25925100 DOI: 10.1098/rspb.2015.0212] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Fungus-farming ant colonies vary four to five orders of magnitude in size. They employ compounds from actinomycete bacteria and exocrine glands as antimicrobial agents. Atta colonies have millions of ants and are particularly relevant for understanding hygienic strategies as they have abandoned their ancestors' prime dependence on antibiotic-based biological control in favour of using metapleural gland (MG) chemical secretions. Atta MGs are unique in synthesizing large quantities of phenylacetic acid (PAA), a known but little investigated antimicrobial agent. We show that particularly the smallest workers greatly reduce germination rates of Escovopsis and Metarhizium spores after actively applying PAA to experimental infection targets in garden fragments and transferring the spores to the ants' infrabuccal cavities. In vitro assays further indicated that Escovopsis strains isolated from evolutionarily derived leaf-cutting ants are less sensitive to PAA than strains from phylogenetically more basal fungus-farming ants, consistent with the dynamics of an evolutionary arms race between virulence and control for Escovopsis, but not Metarhizium. Atta ants form larger colonies with more extreme caste differentiation relative to other attines, in societies characterized by an almost complete absence of reproductive conflicts. We hypothesize that these changes are associated with unique evolutionary innovations in chemical pest management that appear robust against selection pressure for resistance by specialized mycopathogens.
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Affiliation(s)
- Hermógenes Fernández-Marín
- Centro de Biodiversidad y Descubrimiento de Drogas, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología, Edificio 219, Ciudad del Saber, Clayton, Panamá Centre for Social Evolution, Department of Biology, University of Copenhagen Universitetsparken 15, Copenhagen 2100, Denmark Smithsonian Tropical Research Institute, PO Box 0843-03092, Balboa, Ancón, Republic of Panamá
| | - David R Nash
- Centre for Social Evolution, Department of Biology, University of Copenhagen Universitetsparken 15, Copenhagen 2100, Denmark
| | - Sarah Higginbotham
- Smithsonian Tropical Research Institute, PO Box 0843-03092, Balboa, Ancón, Republic of Panamá
| | - Catalina Estrada
- Smithsonian Tropical Research Institute, PO Box 0843-03092, Balboa, Ancón, Republic of Panamá
| | - Jelle S van Zweden
- Centre for Social Evolution, Department of Biology, University of Copenhagen Universitetsparken 15, Copenhagen 2100, Denmark Laboratory of Socioecology and Social Evolution, Zoological Institute, University of Leuven, Naamsestraat 59, box 2466, Leuven 3000, Belgium
| | - Patrizia d'Ettorre
- Centre for Social Evolution, Department of Biology, University of Copenhagen Universitetsparken 15, Copenhagen 2100, Denmark Laboratoire d'Ethologie Expérimentale et Comparée (LEEC), University of Paris 13, Sorbonne Paris Cité, France
| | - William T Wcislo
- Smithsonian Tropical Research Institute, PO Box 0843-03092, Balboa, Ancón, Republic of Panamá
| | - Jacobus J Boomsma
- Centre for Social Evolution, Department of Biology, University of Copenhagen Universitetsparken 15, Copenhagen 2100, Denmark
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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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18
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Estrada C, Rojas EI, Wcislo WT, Van Bael SA. Fungal endophyte effects on leaf chemistry alter the in vitro growth rates of leaf-cutting ants' fungal mutualist, Leucocoprinus gongylophorus. FUNGAL ECOL 2014. [DOI: 10.1016/j.funeco.2013.12.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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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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Estrada C, Wcislo WT, Van Bael SA. Symbiotic fungi alter plant chemistry that discourages leaf-cutting ants. New Phytol 2013; 198:241-251. [PMID: 23406415 DOI: 10.1111/nph.12140] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Accepted: 12/07/2012] [Indexed: 05/16/2023]
Abstract
Fungal symbionts that live asymptomatically inside plant tissues (endophytes) can influence plant-insect interactions. Recent work has shown that damage by leaf-cutting ants, a major Neotropical defoliator, is reduced to almost half in plants with high densities of endophytes. We investigated changes in the phenotype of leaves that could influence ants' behavior to result in the reduction of foliar damage. We produced cucumber seedlings with high and low densities of one common endophyte species, Colletotrichum tropicale. We used the leaves in bioassays and to compare chemical and physical leaf characteristics important for ants' food selection. Ants cut about one-third more area of cucumber leaves with lower densities of endophytes and removed c. 20% more paper disks impregnated with the extracts of those leaves compared with leaves and disks from plants hosting the fungus. Colletotrichum tropicale colonization did not cause detectable changes in the composition of volatile compounds, cuticular waxes, nutrients or leaf toughness. Our study shows that endophytes changed leaf chemistry and suggests that compounds with relative low volatility released after leaf wounding are a major factor influencing foraging decisions by ants when choosing between plants with low or high endophyte loads.
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Affiliation(s)
- Catalina Estrada
- Smithsonian Tropical Research Institute, Apartado, 0843-03092, Republic of Panama
| | - William T Wcislo
- Smithsonian Tropical Research Institute, Apartado, 0843-03092, Republic of Panama
| | - Sunshine A Van Bael
- Smithsonian Tropical Research Institute, Apartado, 0843-03092, Republic of Panama
- Department of Ecology and Evolutionary Biology, Tulane University, 400 Lindy Boggs, New Orleans, LA, 70118, USA
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Van Bael SA, Estrada C, Rehner SA, Santos JF, Wcislo WT. Leaf endophyte load influences fungal garden development in leaf-cutting ants. BMC Ecol 2012; 12:23. [PMID: 23140096 PMCID: PMC3537522 DOI: 10.1186/1472-6785-12-23] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [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] [Received: 08/24/2012] [Accepted: 11/05/2012] [Indexed: 11/10/2022] Open
Abstract
Background Previous work has shown that leaf-cutting ants prefer to cut leaf material with relatively low fungal endophyte content. This preference suggests that fungal endophytes exact a cost on the ants or on the development of their colonies. We hypothesized that endophytes may play a role in their host plants’ defense against leaf-cutting ants. To measure the long-term cost to the ant colony of fungal endophytes in their forage material, we conducted a 20-week laboratory experiment to measure fungal garden development for colonies that foraged on leaves with low or high endophyte content. Results Colony mass and the fungal garden dry mass did not differ significantly between the low and high endophyte feeding treatments. There was, however, a marginally significant trend toward greater mass of fungal garden per ant worker in the low relative to the high endophyte treatment. This trend was driven by differences in the fungal garden mass per worker from the earliest samples, when leaf-cutting ants had been foraging on low or high endophyte leaf material for only 2 weeks. At two weeks of foraging, the mean fungal garden mass per worker was 77% greater for colonies foraging on leaves with low relative to high endophyte loads. Conclusions Our data suggest that the cost of endophyte presence in ant forage material may be greatest to fungal colony development in its earliest stages, when there are few workers available to forage and to clean leaf material. This coincides with a period of high mortality for incipient colonies in the field. We discuss how the endophyte-leaf-cutter ant interaction may parallel constitutive defenses in plants, whereby endophytes reduce the rate of colony development when its risk of mortality is greatest.
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Affiliation(s)
- Sunshine A Van Bael
- Department of Ecology and Evolutionary Biology, Tulane University, 6823 St. Charles Avenue, New Orleans, LA 70118, USA.
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22
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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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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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27
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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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29
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Guerrieri E, Huigens ME, Estrada C, Woelke JB, de Rijk M, Fatouros NE, Aiello A, Noyes JS. Ooencyrtus marcelloisp. nov. (Hymenoptera: Encyrtidae), an egg parasitoid of Heliconiini (Lepidoptera: Nymphalidae: Heliconiinae) on passion vines (Malpighiales: Passifloraceae) in Central America. J NAT HIST 2009. [DOI: 10.1080/00222930903362051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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30
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Estrada C, Yildizhan S, Schulz S, Gilbert LE. Sex-specific chemical cues from immatures facilitate the evolution of mate guarding in Heliconius butterflies. Proc Biol Sci 2009; 277:407-13. [PMID: 19828544 DOI: 10.1098/rspb.2009.1476] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Competition for mates has substantial effects on sensory systems and often leads to the evolution of extraordinary mating behaviours in nature. The ability of males to find sexually immature females and associate with them until mating is a remarkable example. Although several aspects of such pre-copulatory mate guarding have been investigated, little is known about the mechanisms used by males to locate immature females and assess their maturity. These are not only key components of the origin and maintenance of this mating strategy, but are also necessary for inferring the level to which females cooperate and thus the incidence of sexual conflict. We investigated the cues involved in recognition of immature females in Heliconius charithonia, a butterfly that exhibits mate guarding by perching on pupae. We found that males recognized female pupae using sex-specific volatile monoterpenes produced by them towards the end of pupal development. Considering the presumed biosynthetic pathways of such compounds and the reproductive biology of Heliconius, we propose that these monoterpenes are coevolved signals and not just sex-specific cues exploited by males. Their maintenance, despite lack of female mate choice, may be explained by variation in cost that females pay with this male behaviour under heterogeneous ecological conditions.
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Affiliation(s)
- Catalina Estrada
- Integrative Biology, University of Texas at Austin, 1 University Station C0930, Austin, TX 78712, USA.
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31
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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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32
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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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Schulz S, Estrada C, Yildizhan S, Boppré M, Gilbert LE. An antiaphrodisiac in Heliconius melpomene butterflies. J Chem Ecol 2007; 34:82-93. [PMID: 18080165 DOI: 10.1007/s10886-007-9393-z] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2007] [Revised: 09/19/2007] [Accepted: 10/29/2007] [Indexed: 11/29/2022]
Abstract
Gilbert (1976) suggested that male-contributed odors of mated females of Heliconius erato could enforce monogamy. We investigated the pheromone system of a relative, Heliconius melpomene, using chemical analysis, behavioral experiments, and feeding experiments with labeled biosynthetic pheromone precursors. The abdominal scent glands of males contained a complex odor bouquet, consisting of the volatile compound (E)-beta-ocimene together with some trace components and a less volatile matrix made up predominately of esters of common C16- and C18-fatty acids with the alcohols ethanol, 2-propanol, 1-butanol, isobutanol, 1-hexanol, and (Z)-3-hexenol. This bouquet is formed during the first days after eclosion, and transferred during copulation to the females. Virgin female scent glands do not contain these compounds. The transfer of ocimene and the esters was shown by analysis of butterflies of both sexes before and after copulation. Additional proof was obtained by males fed with labeled D-13C6- glucose. They produced 13C-labeled ocimene and transferred it to females during copulation. Behavioral tests with ocimene applied to unmated females showed its repellency to males. The esters did not show such activity, but they moderated the evaporation rate of ocimene. Our investigation showed that beta-ocimene is an antiaphrodisiac pheromone of H. melpomene.
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Affiliation(s)
- Stefan Schulz
- Institut für Organische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany.
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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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Schulz S, Yildizhan S, Stritzke K, Estrada C, Gilbert LE. Macrolides from the scent glands of the tropical butterflies Heliconius cydno and Heliconius pachinus. Org Biomol Chem 2007; 5:3434-41. [DOI: 10.1039/b710284d] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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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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