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Díaz-Flores L, Gutiérrez R, Gayoso S, García MP, González-Gómez M, Díaz-Flores L, Sánchez R, Carrasco JL, Madrid JF. Intussusceptive angiogenesis and its counterpart intussusceptive lymphangiogenesis. Histol Histopathol 2020; 35:1083-1103. [PMID: 32329808 DOI: 10.14670/hh-18-222] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Intussusceptive angiogenesis (IA) is currently considered an important alternative and complementary form of sprouting angiogenesis (SA). Conversely, intussusceptive lymphangiogenesis (IL) is in an initial phase of study. We compare their morphofunctional characteristics, since many can be shared by both processes. To that end, the following aspects are considered: A) The concept of IA and IL as the mechanism by which blood and lymphatic vessels split, expand and remodel through transluminal pillar formations (hallmarks of intussusception). B) Terminology and historical background, with particular reference to the group of Burri, including Djonov and Patan, who initiated and developed the vessel intussusceptive concept in blood vessels. C) Incidence in normal (e.g. in the sinuses of developing lymph nodes) and pathologic conditions, above all in vessel diseases, such as dilated veins in hemorrhoidal disease, intravascular papillary endothelial hyperplasia (IPEH), sinusoidal hemangioma, lobular capillary hemangioma, lymphangiomas/lymphatic malformations and vascular transformation of lymph nodes. D) Differences and complementarity between vessel sprouting and intussusception. E) Characteristics of the cover (endothelial cells) and core (connective tissue components) of pillars and requirements for pillar identification. F) Structures involved in pillar formation, including endothelial contacts of opposite vessel walls, interendothelial bridges, merged adjacent capillaries, vessel loops and spilt pillars. G) Structures resulting from pillars with intussusceptive microvascular growth, arborization, remodeling and segmentation (compartmentalization). H) Influence of intussusception in the morphogenesis of vessel tumors/ pseudotumors; and I) Hemodynamic and molecular control of vessel intussusception, including VEGF, PDGF BB, Hypoxia, Notch, Endoglobin and Nitric oxide.
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Affiliation(s)
- L Díaz-Flores
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain.
| | - R Gutiérrez
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - S Gayoso
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - M P García
- Department of Pathology, Eurofins® Megalab-Hospiten Hospitals, Tenerife, Spain
| | - M González-Gómez
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - L Díaz-Flores
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - R Sánchez
- Department of Internal Medicine, Dermatology and Psychiatry, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - J L Carrasco
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - J F Madrid
- Department of Cell Biology and Histology, School of Medicine, Campus of International Excellence "Campus Mare Nostrum", IMIB-Arrixaca, University of Murcia, Murcia, Spain
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Vargas RG, Campos EG, Gutiérrez R, Casarrubia MM, Morales MR, Correa UJ, Mendoza AM, Azpiroz-Leehan J, Tobon SH, Miranda RS. Evaluation of the effect of the mandibular advance device in the upper airway using MRI. Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.491] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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3
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Santás M, Zafra V, Recuero IG, Merino F, Redondo M, Romance A, Gutiérrez R, Aniceto GS. Sarcomas of the jaws: 20 years of experience. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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4
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Rosière NI, Gutiérrez R, Madrid C, Mendoza M, Martínez A, Bellia-Munzón G. [Result of 12 years of non-surgical treatment of pectus carinatum]. Cir Pediatr 2018; 31:115-120. [PMID: 30260102] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To report our experience in the treatment of pectus carinatum by using the dynamic compression system. MATERIAL AND METHODS Retrospective study during the period from January 2005 to September 2017. Patients with typical condrogladiolar pectus carinatum and correction pressure (PC) ≤ 14 PSI (pound square inch) were included. Exclusion criteria: patients with previous thoracic surgery, mixed malformations and chondromanubrial pectus carinatum. For the treatment, the Dynamic Thoracic Compressor System (FMF) with pressure meter in PSI was used. The PC, the treatment pressure (PT), the correction time (TC) and the maintenance time (TM), recurrences and complications were analyzed. A qualitative scale was measured in three grades: where A is excellent or very good, B is regular and C is bad. RESULTS We treated 104 patients under 18 years of age. The PT was 2.26. The average of the TC was 8.8 months. The TM was on average 8 months. 36.5% of the patients finished the treatment, 36.5% still continue in treatment and 26.9% of the patients lost the follow-up due to desertion. The qualitative assessment was positive in 95.5% of our patients, and unfavourable in 4.5%. CONCLUSION The non-surgical treatment of pectus carinatum is efficient, non-invasive and of low morbidity. Regarding the high dropout rate, we must analyze the variables to be modified to reduce it. This treatment should be considered as the first option to correct pectus carinatum in patients with flexible thorax.
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Affiliation(s)
- N I Rosière
- Servicio de Cirugía Torácica. Hospital General de Niños "Dr. Pedro de Elizalde". Ciudad Autónoma de Buenos Aires, Argentina
| | - R Gutiérrez
- Servicio de Cirugía Torácica. Hospital General de Niños "Dr. Pedro de Elizalde". Ciudad Autónoma de Buenos Aires, Argentina
| | - C Madrid
- Servicio de Cirugía Torácica. Hospital General de Niños "Dr. Pedro de Elizalde". Ciudad Autónoma de Buenos Aires, Argentina
| | - M Mendoza
- Servicio de Cirugía Torácica. Hospital General de Niños "Dr. Pedro de Elizalde". Ciudad Autónoma de Buenos Aires, Argentina
| | - A Martínez
- Servicio de Cirugía Torácica. Hospital General de Niños "Dr. Pedro de Elizalde". Ciudad Autónoma de Buenos Aires, Argentina
| | - G Bellia-Munzón
- Servicio de Cirugía Torácica. Hospital General de Niños "Dr. Pedro de Elizalde". Ciudad Autónoma de Buenos Aires, Argentina
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5
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De La Fuente M, Chahuán I, Gutiérrez R, Díaz-Jiménez D, Olivares M, Vidal R, Simian D, Figueroa C, Quera R, Hermoso MA. [Presence of intracellular Escherichia coli in patients with inflammatory bowel disease]. Rev Med Chil 2018; 145:1129-1136. [PMID: 29424399 DOI: 10.4067/s0034-98872017000901129] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 10/03/2017] [Indexed: 11/17/2022]
Abstract
BACKGROUND Different strains of invasive Escherichia coli (E. coli), isolated from intestinal mucosa of patients, are related to the pathogenesis of inflammatory bowel diseases (IBD). AIM To evaluate an association between intracellular E. coli and IBD; its clinical characteristics and use of steroids. MATERIAL AND METHODS Sixty one patients with Crohn's disease and 83 with ulcerative colitis were studied. To determine the intracellular E. coli content, colonoscopy biopsies of these patients and 29 control subjects were processed using the gentamicin protection assay. Differences in the bacterial content between patient groups were evaluated using Mann-Whitney test, while the association between presence of E. coli with endoscopic activity, location/extension and use of corticosteroid as anti-inflammatory treatment were evaluated with Fisher's exact test or Chi-square test. RESULTS E. coli strains were detected in 36.1, 39.3 and 10.3% of patients with ulcerative colitis, Crohn's disease and controls, respectively. The number of bacteria per biopsy in Crohn's disease and ulcerative colitis was significantly higher than in controls (p < 0.01 between patients and controls). In ulcerative colitis, significant associations were found between the presence of bacteria and disease location and use of corticosteroids. In Crohn's disease, no association was found. CONCLUSIONS IBD are associated with the presence of intracellular E. coli strains in the intestinal mucosa, suggesting an alteration in the microbiota or loss of integrity of the epithelial barrier. The association of intracellular E. coli with clinical features and the use of corticosteroids in ulcerative colitis suggests that different factors could promote colonization or proliferation of these bacteria.
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Affiliation(s)
- Marjorie De La Fuente
- Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Isidora Chahuán
- Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - RocÍo Gutiérrez
- Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - David Díaz-Jiménez
- Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Mauricio Olivares
- Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Roberto Vidal
- Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Daniela Simian
- Subdirección de Investigación Clínica, Clínica Las Condes, Santiago, Chile
| | | | | | - Marcela A Hermoso
- Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
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Vaquero J, Zurita M, Rico MA, Aguayo C, Fernández C, Gutiérrez R, Rodríguez-Boto G, Saab A, Hassan R, Ortega C. Intrathecal administration of autologous bone marrow stromal cells improves neuropathic pain in patients with spinal cord injury. Neurosci Lett 2018; 670:14-18. [PMID: 29366770 DOI: 10.1016/j.neulet.2018.01.035] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Revised: 01/02/2018] [Accepted: 01/18/2018] [Indexed: 12/19/2022]
Abstract
Neuropathic pain (NP) is highly disabling, responds poorly to pharmacological treatment, and represents a significant cause of decreased quality of life in patients suffering from spinal cord injury (SCI). In recent years, cell therapy with autologous mesenchymal stromal cells (MSCs) has been considered as a potential therapeutic weapon in this entity. Ten patients suffering chronic SCI received 100 million MSCs into subarachnoid space by lumbar puncture (month 1 of the study) and this procedure was repeated at months 4 and 7 until reaching a total doses of 300 million MSCs. Intensity of NP was measured by standard numerical rating scale (VAS) from 0 to 10, recording scores previous to the first MSCs administration and monthly, until month 10 of follow-up. Months 1, 4, 7 and 10 of the study were selected as time points in order to a statistical analysis by the nonparametric Wilcoxon rank test. Our results showed significant and progressive improvement in NP intensity after the first administration of MSCs (p: 0.003). This study supports the benefit of intrathecal administration of autologous MSCs for the treatment of NP in patients with SCI.
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Affiliation(s)
- J Vaquero
- Service of Neurosurgery, Puerta de Hierro-Majadahonda Hospital, Autonomous University, Madrd, Spain.
| | - M Zurita
- Service of Neurosurgery, Puerta de Hierro-Majadahonda Hospital, Autonomous University, Madrd, Spain
| | - M A Rico
- Service of Neurosurgery, Puerta de Hierro-Majadahonda Hospital, Autonomous University, Madrd, Spain
| | - C Aguayo
- Service of Neurosurgery, Puerta de Hierro-Majadahonda Hospital, Autonomous University, Madrd, Spain
| | - C Fernández
- Service of Neurosurgery, Puerta de Hierro-Majadahonda Hospital, Autonomous University, Madrd, Spain
| | - R Gutiérrez
- Service of Neurosurgery, Puerta de Hierro-Majadahonda Hospital, Autonomous University, Madrd, Spain
| | - G Rodríguez-Boto
- Service of Neurosurgery, Puerta de Hierro-Majadahonda Hospital, Autonomous University, Madrd, Spain
| | - A Saab
- Service of Neurosurgery, Puerta de Hierro-Majadahonda Hospital, Autonomous University, Madrd, Spain
| | - R Hassan
- Service of Neurosurgery, Puerta de Hierro-Majadahonda Hospital, Autonomous University, Madrd, Spain
| | - C Ortega
- Service of Neurosurgery, Puerta de Hierro-Majadahonda Hospital, Autonomous University, Madrd, Spain
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7
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Müller A, Monti G, Otth C, Sepúlveda P, Bittencourt P, Nachum-Biala Y, Gutiérrez R, Harrus S. "Candidatus Neoehrlichia chilensis" sp. nov.: Molecular detection and characterization of a novel Anaplasmataceae in wild rodents from Valdivia, southern Chile. Transbound Emerg Dis 2018; 65:357-362. [PMID: 29363276 DOI: 10.1111/tbed.12815] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Indexed: 01/23/2023]
Abstract
This study aimed to screen wild rodents from southern Chile, for the presence of Anaplasmatacea. Spleen samples from 33 wild rodents trapped in Valdivia Province were screened by conventional PCR (cPCR), targeting the Anaplasmataceae 16S rRNA gene (16S). Positive samples were further evaluated, targeting a larger 16S fragment, groEL operon, and gltA gene, followed by sequencing and phylogenetic analysis. Anaplasmataceae DNA was detected in 15% (five of 33) of the tested rodents (Abrothrix sp. [four of five] and Mus musculus [one of five]). Analysis of sequenced products based on the 16S gene revealed high similarity with "Ca. Neoehrlichia mikurensis," "Ca. Neoehrlichia lotoris" and "Ca. Neoehrlichia arcana" (97.8%-98.6%). A lower similarity was observed with Candidatus Neoehrlichia groEL (89.7%-92%) and gltA (79.5%-79.9%) loci. According to the 16SrRNA, groEL and gltA phylogenetic analyses, two closely related genotypes of "Candidatus Neoehrlichia" spp. from Chile were observed, which clustered together in a separate clade from other species in this genus. This study suggests the presence of two genotypes of a novel species of "Candidatus Neoehrlichia," proposed as "Candidatus Neoehrlichia chilensis," circulating in rodents from Chile. This is the first report of "Ca. Neoehrlichia" species in rodents from America.
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Affiliation(s)
- A Müller
- Faculty of Veterinary Sciences, Universidad Austral de Chile, Valdivia, Chile
| | - G Monti
- Faculty of Veterinary Sciences, Universidad Austral de Chile, Valdivia, Chile
| | - C Otth
- Faculty of Medicine, Universidad Austral de Chile, Valdivia, Chile
| | - P Sepúlveda
- Faculty of Veterinary Sciences, Universidad Austral de Chile, Valdivia, Chile
| | - P Bittencourt
- School of Veterinary Medicine, Universidad Mayor, Temuco, Chile
| | - Y Nachum-Biala
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, Israel
| | - R Gutiérrez
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, Israel
| | - S Harrus
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, Israel
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8
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Kamani J, Apanaskevich DA, Gutiérrez R, Nachum-Biala Y, Baneth G, Harrus S. Morphological and molecular identification of Rhipicephalus (Boophilus) microplus in Nigeria, West Africa: a threat to livestock health. Exp Appl Acarol 2017; 73:283-296. [PMID: 28887701 DOI: 10.1007/s10493-017-0177-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 09/02/2017] [Indexed: 05/24/2023]
Abstract
The cattle tick Rhipicephalus (Boophilus) microplus was first reported in West Africa in Ivory Coast, in 2007. Since then it has made an aggressive eastward advancement having been reported in four other West African countries: Mali, Burkina Faso, Togo and Benin. We herein report the first molecular identification of this tick species in Nigeria, West Africa, and highlight the threat it poses to livestock health. A nation-wide tick survey was conducted in 12 out of 36 states across the various agro ecological zones of Nigeria over a 1 year period (April 2014-March 2015). In total 1498 ticks belonging to three genera collected from cattle were morphologically identified. Overall, Amblyomma species constituted the highest percentage of sampled ticks, 50.2% (752/1498), followed by Rhipicephalus (including the subgenus Boophilus) species, 29.4% (440/1498) and Hyalomma species, 20.4% (306/1498). The presence of Rh. (B.) microplus was identified morphologically from four out of the 12 states. This finding was confirmed for the first time in Nigeria using a molecular method targeting the ITS-2 region of the ticks in three of the 12 states. This study ascertained the presence of Rh. (B.) microplus in Nigeria in addition to a broad variety of cattle tick species, most of which are of veterinary importance. The implication of this finding is that there may be additional economic burden to livestock farmers due to increased cost of tick control occasioned by the acaricide resistance by this tick species widely reported from different climes. Additionally, there may be a potential upsurge in incidence of hemoparasitic infections in cattle leading to increased morbidity, cost of treatment and mortalities.
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Affiliation(s)
- J Kamani
- Parasitology Division, National Veterinary Research Institute, PMB 01, Vom, Plateau State, Nigeria.
| | - D A Apanaskevich
- United States National Tick Collection, The James H. Oliver, Jr. Institute for Coastal Plain Science, Georgia Southern University, Statesboro, GA, 30460-8056, USA
| | - R Gutiérrez
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Y Nachum-Biala
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, Israel
| | - G Baneth
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, Israel
| | - S Harrus
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, Israel
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Ferreres A, Gómez M, Gutiérrez R. Pseudoartrosis y consolidaciones viciosas de falanges distales. Rev Iberoam Cir Mano 2017. [DOI: 10.1016/j.ricma.2015.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Objetivo: Analizar los resultados obtenidos en el tratamiento quirúrgico de las pseudoartrosis y mala consolidación de falange distal.Material y método: Se revisaron las historias clínicas de tres pacientes que fueron tratados de una pseudoartrosis y uno de una mala consolidación de la falange distal. El tratamiento consistió en resecar el tejido fibroso, realizar un aporte de hueso esponjoso autólogo y una fijación interna con tornillos de minifragmentos. La vía de acceso varió en función de la localización de la lesión.Resultados: En todos los pacientes se obtuvo la consolidación y reanudaron sus actividades previas sin molestias.Conclusión: La pseudoartrosis y/o mala consolidación de falange distal puede solucionarse de forma efectiva mediante un apropiado abordaje quirúrgico, una fijación interna estable y aporte de injerto óseo autólogo.
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Affiliation(s)
- A. Ferreres
- Institut Kaplan. Cirugía de la Mano. Barcelona
| | - M.A. Gómez
- Unidad de Cirugía de la Mano. Hospital Pablo Tobon Uribe. Medellín, Colombia
| | - R. Gutiérrez
- Instituto Traumatológico. Instituto de Seguridad del Trabajador. Santiago, Chile
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Schettino B, Vega S, Gutiérrez R, Escobar A, Romero J, Domínguez E, González-Ronquillo M. Fatty acid profile of goat milk in diets supplemented with chia seed (Salvia hispanica L.). J Dairy Sci 2017; 100:6256-6265. [DOI: 10.3168/jds.2017-12785] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 04/09/2017] [Indexed: 11/19/2022]
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11
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Díaz-Flores L, Gutiérrez R, García-Suárez MP, Sáez FJ, Gutiérrez E, Valladares F, Carrasco JL, Díaz-Flores L, Madrid JF. Morphofunctional basis of the different types of angiogenesis and formation of postnatal angiogenesis-related secondary structures. Histol Histopathol 2017; 32:1239-1279. [PMID: 28762232 DOI: 10.14670/hh-11-923] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We review the morpho-functional basis of the different types of angiogenesis and report our observations, including the formation of angiogenesis-related secondary structures. First of all, we consider the following issues: a) conceptual differences between angiogenesis and vasculogenesis, b) incidence of angiogenesis in pre- and postnatal life, c) regions of vascular tree with angiogenic capacity, d) cells (endothelial cells, pericytes, CD34+ adventitial stromal cells of the microvasculature and inflammatory cells) and extracellular matrix components involved in angiogenesis, e) events associated with angiogenesis, f) different types of angiogenesis, including sprouting and intussusceptive angiogenesis, and other angiogenic or vascularization forms arising from endothelial precursor cells (postnatal vasculogenesis), vasculogenesis mimicry, vessel co-option and piecemeal angiogenesis. Subsequently, we consider the specific morpho-functional characteristics of each type of angiogenesis. In sprouting angiogenesis, we grouped the events in three phases: a) activation phase, which includes vasodilation and increased permeability, EC, pericyte and CD34+ adventitial stromal cell activation, and recruitment and activation of inflammatory cells, b) sprouting phase, encompassing EC migration (concept and characteristics of endothelial tip cells, tip cell selection, lateral inhibition, localized filopodia formation, basal lamina degradation and extracellular changes facilitating EC migration), EC proliferation (concept of endothelial stalk cells), pericyte mobilization, proliferation, recruitment and changes in CD34+ adventitial stromal cells and inflammatory cells, tubulogenesis, formation of a new basal lamina, and vascular anastomosis with capillary loop formation, and c) vascular remodelling and stabilization phase (concept of phalanx cells). Subsequently, the concept, incidence, events and mechanisms are considered in the other forms of angiogenesis. Finally, we contribute the formation of postnatal angiogenesis-related secondary structures: a) intravascular structures through piecemeal angiogenesis, including intravascular papillae in vessel tumours and pseudotumours (intravascular papillary endothelial hyperplasia, vascular transformation of the sinus in lymph nodes, papillary intralymphatic angioendothelioma or Dabska tumour, retiform hemangioendothelioma, hemangiosarcoma and lymphangiosarcoma), vascular septa in hemorrhoidal veins and intravascular projections in some tumours; b) arterial intimal thickening; c) intravascular tumours and pseudotumours (e.g. intravenous pyogenic granulomas and intravascular myopericytoma); d) vascular glomeruloid proliferations; and e) pseudopalisading necrosis in glioblastoma multiform.
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Affiliation(s)
- L Díaz-Flores
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain.
| | - R Gutiérrez
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | | | - F J Sáez
- Department of Cell Biology and Histology, School of Medicine and Dentistry, University of the Basque Country, UPV/EHU, Leioa, Spain
| | - E Gutiérrez
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - F Valladares
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain.,CIBER de Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, Spain
| | - J L Carrasco
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - L Díaz-Flores
- Department of Physical Medicine and Pharmacology, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - J F Madrid
- Department of Cell Biology and Histology, School of Medicine, Campus of International Excellence, "Campus Mare Nostrum", IMIB-Arrixaca, University of Murcia, Murcia, Spain
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12
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Leyva I, Sevilla-Escoboza R, Sendiña-Nadal I, Gutiérrez R, Buldú J, Boccaletti S. Inter-layer synchronization in non-identical multi-layer networks. Sci Rep 2017; 7:45475. [PMID: 28374802 PMCID: PMC5379627 DOI: 10.1038/srep45475] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [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: 10/13/2016] [Accepted: 02/28/2017] [Indexed: 12/04/2022] Open
Abstract
Inter-layer synchronization is a dynamical process occurring in multi-layer networks composed of identical nodes. This process emerges when all layers are synchronized, while nodes in each layer do not necessarily evolve in unison. So far, the study of such inter-layer synchronization has been restricted to the case in which all layers have an identical connectivity structure. When layers are not identical, the inter-layer synchronous state is no longer a stable solution of the system. Nevertheless, when layers differ in just a few links, an approximate treatment is still feasible, and allows one to gather information on whether and how the system may wander around an inter-layer synchronous configuration. We report the details of an approximate analytical treatment for a two-layer multiplex, which results in the introduction of an extra inertial term accounting for structural differences. Numerical validation of the predictions highlights the usefulness of our approach, especially for small or moderate topological differences in the intra-layer coupling. Moreover, we identify a non-trivial relationship connecting the betweenness centrality of the missing links and the intra-layer coupling strength. Finally, by the use of multiplexed layers of electronic circuits, we study the inter-layer synchronization as a function of the removed links.
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Affiliation(s)
- I. Leyva
- Complex Systems Group & GISC, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
- Center for Biomedical Technology, Universidad Politécnica de Madrid, 28223 Pozuelo de Alarcón, Madrid, Spain
| | - R. Sevilla-Escoboza
- Centro Universitario de los Lagos, Universidad de Guadalajara, Jalisco 47460, Mexico
| | - I. Sendiña-Nadal
- Complex Systems Group & GISC, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
- Center for Biomedical Technology, Universidad Politécnica de Madrid, 28223 Pozuelo de Alarcón, Madrid, Spain
| | - R. Gutiérrez
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - J.M. Buldú
- Complex Systems Group & GISC, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
- Center for Biomedical Technology, Universidad Politécnica de Madrid, 28223 Pozuelo de Alarcón, Madrid, Spain
| | - S. Boccaletti
- CNR-Institute of complex systems, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
- The Italian Embassy in Israel, Hamered Street 25, 68125 Tel Aviv, Israel
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13
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Jimeno A, Viqueira M, Alcaraz B, Ortín A, Giner J, Gutiérrez R, Rojano R, Jiménez R, Del Amor M, Cobos N. 9. Epidemiología de la endocarditis infecciosa con diagnóstico microbiológico confirmado en el Área II de Murcia-Cartagena. Cirugía Cardiovascular 2017. [DOI: 10.1016/j.circv.2016.11.033] [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] Open
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14
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Abstract
In this paper we study a Volterra integral equation of the second kind, including two arbitrary continuous functions, in order to determine first-passage-time probability density functions through time-dependent boundaries for time-non-homogeneous one-dimensional diffusion processes with natural boundaries. These results generalize those which were obtained for time-homogeneous diffusion processes by Giorno et al. [3], and for some particular classes of time-non-homogeneous diffusion processes by Gutiérrez et al. [4], [5].
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15
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Díaz-Flores L, Gutiérrez R, Madrid JF, García-Suárez MP, González-Álvarez MP, Díaz-Flores L, Sáez FJ. Intravascular papillary endothelial hyperplasia (IPEH). Evidence supporting a piecemeal mode of angiogenesis from vein endothelium, with vein wall neovascularization and papillary formation. Histol Histopathol 2016; 31:1271-9. [PMID: 27323848 DOI: 10.14670/hh-11-795] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Intravascular papillary endothelial hyperplasia (IPEH) is a reactive process of questioned pathogenesis (primary proliferation of endothelial cells/ECs versus organizing thrombi). The aim of this study is to assess the organization of morphologic patterns, with precise location of neovascularization and papillary distribution in IPEH to clarify the role of the vein wall (mainly vein intimal ECs) in lesion development and papillary formation. We studied 12 cases of IPEH in skin and subcutaneous veins by serial histological sections and immunohistochemical procedures. In four well-structured cases (the remaining cases showed overlapping events), we found four principal histological patterns organized by zone: 1) invaginated vein wall zone with microvascular networks. The intraparietal microvessels presented CD34+ and CD31+ ECs arising from ECs of the vein intima, and αSMA+ pericyte-like cells originating from modified SMCs of the media layer. 2) Papillary zone, generally with myriad papillae, formed by ECs of intraparietal microvessel networks encircling vein wall components (parietal papillae). 3) Organizing thrombotic zone from microvascular networks of invaginated vein wall zone. 4) Unorganized thrombotic zone partially covered by ECs, also originating from vein intimal endothelium and arranged in a monolayer or encircling thrombotic fibrin (thrombotic papillae). In conclusion, the capacity of vein intimal ECs and those originating from them (in newly-formed microvessels in the vein itself and covering the unorganized thrombi) to encircle vein wall components or fibrin, and to form papillae (ECs form the cover and encircled components the core) supports a piecemeal mode of angiogenesis as a pathogenic basis of IPEH. This mechanism encompasses the two histogenetic hypotheses outlined above.
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Affiliation(s)
- L Díaz-Flores
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, La Laguna, Tenerife, Spain.
| | - R Gutiérrez
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, La Laguna, Tenerife, Spain
| | - J F Madrid
- Department of Cell Biology and Histology, School of Medicine, Regional Campus of International Excellence, "Campus Mare Nostrum", IMIB-Arrixaca, University of Murcia, Murcia, Spain
| | | | - M P González-Álvarez
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, La Laguna, Tenerife, Spain
| | - L Díaz-Flores
- Department of Physical Medicine and Pharmacology, Faculty of Medicine, University of La Laguna, La Laguna, Tenerife, Spain
| | - F J Sáez
- Deparment of Cell Biology and Histology, UFI11/44, School of Medicine and Dentistry, University of the Basque Country, UPV/EHU, Leioa, Spain
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16
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Sevilla-Escoboza R, Sendiña-Nadal I, Leyva I, Gutiérrez R, Buldú JM, Boccaletti S. Inter-layer synchronization in multiplex networks of identical layers. Chaos 2016; 26:065304. [PMID: 27368794 DOI: 10.1063/1.4952967] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Inter-layer synchronization is a distinctive process of multiplex networks whereby each node in a given layer evolves synchronously with all its replicas in other layers, irrespective of whether or not it is synchronized with the other units of the same layer. We analytically derive the necessary conditions for the existence and stability of such a state, and verify numerically the analytical predictions in several cases where such a state emerges. We further inspect its robustness against a progressive de-multiplexing of the network, and provide experimental evidence by means of multiplexes of nonlinear electronic circuits affected by intrinsic noise and parameter mismatch.
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Affiliation(s)
- R Sevilla-Escoboza
- Centro Universitario de los Lagos, Universidad de Guadalajara, Jalisco 47460, Mexico
| | - I Sendiña-Nadal
- Complex Systems Group & GISC, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - I Leyva
- Complex Systems Group & GISC, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - R Gutiérrez
- School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - J M Buldú
- Complex Systems Group & GISC, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - S Boccaletti
- CNR-Institute of Complex Systems, Via Madonna del Piano, 10, 50019 Sesto Fiorentino, Florence, Italy
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17
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Díaz-Flores L, Gutiérrez R, González-Gómez M, Díaz-Flores L, Valladares F, Rancel N, Sáez FJ, Madrid JF. Telocyte Behaviour During Inflammation, Repair and Tumour Stroma Formation. Adv Exp Med Biol 2016; 913:177-191. [PMID: 27796888 DOI: 10.1007/978-981-10-1061-3_12] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In this chapter, we outline the role of human CD34+ stromal cells/telocytes (CD34+ SC/TCs) as progenitor cells during repair. The in vivo activation phenomena of CD34+ SC/TCs in this process include increased size; separation from the neighbouring structures (mainly of the vascular walls); association with inflammatory cells, predominantly macrophages; development of the organelles of synthesis (rough endoplasmic reticulum and Golgi apparatus); cell proliferation with presence of mitosis and high proliferative index (transit-amplifying cells); and fibroblastic and myofibroblastic differentiation. A procedure to study these tissue-resident cells, comparison of their behaviour in vivo and in vitro and different behaviour depending on location, time, type of injury (including tumour stroma) and greater or lesser proximity to the injury are also considered.
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Affiliation(s)
- L Díaz-Flores
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain.
| | - R Gutiérrez
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - M González-Gómez
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - L Díaz-Flores
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - F Valladares
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - N Rancel
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - F J Sáez
- Department of Cell Biology and Histology, UFI11/44, School of Medicine and Dentistry, University of the Basque Country, UPV/EHU, Leioa, Spain
| | - J F Madrid
- Department of Cell Biology and Histology, School of Medicine, Regional Campus of International Excellence, "Campus Mare Nostrum" University of Murcia, Murcia, Spain
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18
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Zubillaga I, Redondo M, Gutiérrez R, Sánchez G. Medial sural artery perforator flap in tongue reconstruction. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Gutiérrez R, Romero L, Loya-Montiel I, Solorzano A, Rosales P, Morales-Miranda S. P09.39 Hiv/syphilis prevalence and risk behaviours among transgender women and men who have sex with men in nicaragua: sentinel surveillance and sti control (vicits), 2014. Br J Vener Dis 2015. [DOI: 10.1136/sextrans-2015-052270.423] [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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20
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Sofer S, Gutiérrez R, Morick D, Mumcuoglu KY, Harrus S. Molecular detection of zoonotic bartonellae (B. henselae, B. elizabethae and B. rochalimae) in fleas collected from dogs in Israel. Med Vet Entomol 2015; 29:344-348. [PMID: 25865162 DOI: 10.1111/mve.12116] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Revised: 12/14/2014] [Accepted: 12/21/2014] [Indexed: 06/04/2023]
Abstract
Fleas represent an acknowledged burden on dogs worldwide. The characterization of flea species infesting kennel dogs from two localities in Israel (Rehovot and Jerusalem) and their molecular screening for Bartonella species (Rhizobiales: Bartonellaceae) was investigated. A total of 355 fleas were collected from 107 dogs. The fleas were morphologically classified and molecularly screened targeting the Bartonella 16S-23S internal transcribed spacer (ITS). Of the 107 dogs examined, 80 (74.8%) were infested with Ctenocephalides canis (Siphonaptera: Pulicidae), 68 (63.6%) with Ctenocephalides felis, 15 (14.0%) with Pulex irritans (Siphonaptera: Pulicidae) and one (0.9%) with Xenopsylla cheopis (Siphonaptera: Pulicidae). Fleas were grouped into 166 pools (one to nine fleas per pool) according to species and host. Thirteen of the 166 flea pools (7.8%) were found to be positive for Bartonella DNA. Detected ITS sequences were 99-100% similar to those of four Bartonella species: Bartonella henselae (six pools); Bartonella elizabethae (five pools); Bartonella rochalimae (one pool), and Bartonella bovis (one pool). The present study indicates the occurrence of a variety of flea species in dogs in Israel; these flea species are, in turn, carriers of several zoonotic Bartonella species. Physicians, veterinarians and public health workers should be aware of the presence of these pathogens in dog fleas in Israel and preventive measures should be implemented.
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Affiliation(s)
- S Sofer
- Koret School of Veterinary Medicine, Hebrew University of Jerusalem, Rehovot, Israel
| | - R Gutiérrez
- Koret School of Veterinary Medicine, Hebrew University of Jerusalem, Rehovot, Israel
| | - D Morick
- Koret School of Veterinary Medicine, Hebrew University of Jerusalem, Rehovot, Israel
| | - K Y Mumcuoglu
- Department of Microbiology and Molecular Genetics, Kuvin Centre for the Study of Infectious and Tropical Diseases, Hadassah Medical School, Hebrew University of Jerusalem, Jerusalem, Israel
| | - S Harrus
- Koret School of Veterinary Medicine, Hebrew University of Jerusalem, Rehovot, Israel
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21
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Sevilla-Escoboza R, Gutiérrez R, Huerta-Cuellar G, Boccaletti S, Gómez-Gardeñes J, Arenas A, Buldú JM. Enhancing the stability of the synchronization of multivariable coupled oscillators. Phys Rev E Stat Nonlin Soft Matter Phys 2015; 92:032804. [PMID: 26465525 DOI: 10.1103/physreve.92.032804] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Indexed: 06/05/2023]
Abstract
Synchronization processes in populations of identical networked oscillators are the focus of intense studies in physical, biological, technological, and social systems. Here we analyze the stability of the synchronization of a network of oscillators coupled through different variables. Under the assumption of an equal topology of connections for all variables, the master stability function formalism allows assessing and quantifying the stability properties of the synchronization manifold when the coupling is transferred from one variable to another. We report on the existence of an optimal coupling transference that maximizes the stability of the synchronous state in a network of Rössler-like oscillators. Finally, we design an experimental implementation (using nonlinear electronic circuits) which grounds the robustness of the theoretical predictions against parameter mismatches, as well as against intrinsic noise of the system.
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Affiliation(s)
- R Sevilla-Escoboza
- Centro Universitario de los Lagos, Universidad de Guadalajara, Enrique Díaz de Leon, Paseos de la Montaña, Lagos de Moreno, Jalisco 47460, Mexico
| | - R Gutiérrez
- Department of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - G Huerta-Cuellar
- Centro Universitario de los Lagos, Universidad de Guadalajara, Enrique Díaz de Leon, Paseos de la Montaña, Lagos de Moreno, Jalisco 47460, Mexico
| | - S Boccaletti
- CNR-Istituto dei Sistemi Complessi, Via Madonna del Piano, 10, 50019 Sesto Fiorentino, Italy
- Italian Embassy in Israel, 25 Hamered Street, 68125 Tel Aviv, Israel
| | - J Gómez-Gardeñes
- Departamento de Física de la Materia Condensada, University of Zaragoza, Zaragoza 50009, Spain
- Institute for Biocomputation and Physics of Complex Systems (BIFI), University of Zaragoza, Zaragoza 50018, Spain
| | - A Arenas
- Departament d'Enginyeria Informàtica i Matemàtiques, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - J M Buldú
- Laboratory of Biological Networks, Center for Biomedical Technology, UPM, Pozuelo de Alarcón, 28223 Madrid, Spain
- Complex Systems Group, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
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22
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Sevilla-Escoboza R, Buldú JM, Pisarchik AN, Boccaletti S, Gutiérrez R. Synchronization of intermittent behavior in ensembles of multistable dynamical systems. Phys Rev E Stat Nonlin Soft Matter Phys 2015; 91:032902. [PMID: 25871167 DOI: 10.1103/physreve.91.032902] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2014] [Indexed: 06/04/2023]
Abstract
We propose a methodology to analyze synchronization in an ensemble of diffusively coupled multistable systems. First, we study how two bidirectionally coupled multistable oscillators synchronize and demonstrate the high complexity of the basins of attraction of coexisting synchronous states. Then, we propose the use of the master stability function (MSF) for multistable systems to describe synchronizability, even during intermittent behavior, of a network of multistable oscillators, regardless of both the number of coupled oscillators and the interaction structure. In particular, we show that a network of multistable elements is synchronizable for a given range of topology spectra and coupling strengths, irrespective of specific attractor dynamics to which different oscillators are locked, and even in the presence of intermittency. Finally, we experimentally demonstrate the feasibility and robustness of the MSF approach with a network of multistable electronic circuits.
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Affiliation(s)
- R Sevilla-Escoboza
- Centro Universitario de los Lagos, Universidad de Guadalajara, Enrique Díaz de Leon, Paseos de la Montaña, Lagos de Moreno, Jalisco 47460, Mexico
| | - J M Buldú
- Laboratory of Biological Networks, Center for Biomedical Technology, Technical University of Madrid, Pozuelo de Alarcón, 28223 Madrid, Spain
- Complex Systems Group, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - A N Pisarchik
- Computational Systems Biology Group, Center for Biomedical Technology, Technical University of Madrid, Pozuelo de Alarcón, 28223 Madrid, Spain
- Centro de Investigaciones en Optica, Loma del Bosque 115, 37150 Leon, Guanajuato, Mexico
| | - S Boccaletti
- CNR-Istituto dei Sistemi Complessi, Via Madonna del Piano, 10, 50019 Sesto Fiorentino, Italy
- The Italian Embassy in Israel, 25 Hamered Street, 68125 Tel Aviv, Israel
| | - R Gutiérrez
- Department of Chemical Physics, The Weizmann Institute of Science, Rehovot 76100, Israel
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23
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Galván EJ, Pérez-Rosello T, Gómez-Lira G, Lara E, Gutiérrez R, Barrionuevo G. Synapse-specific compartmentalization of signaling cascades for LTP induction in CA3 interneurons. Neuroscience 2015; 290:332-45. [PMID: 25637803 DOI: 10.1016/j.neuroscience.2015.01.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 01/15/2015] [Accepted: 01/15/2015] [Indexed: 11/28/2022]
Abstract
Inhibitory interneurons with somata in strata radiatum and lacunosum-molecular (SR/L-M) of hippocampal area CA3 receive excitatory input from pyramidal cells via the recurrent collaterals (RCs), and the dentate gyrus granule cells via the mossy fibers (MFs). Here we demonstrate that Hebbian long-term potentiation (LTP) at RC synapses on SR/L-M interneurons requires the concomitant activation of calcium-impermeable AMPARs (CI-AMPARs) and N-methyl-d-aspartate receptors (NMDARs). RC LTP was prevented by voltage clamping the postsynaptic cell during high-frequency stimulation (HFS; 3 trains of 100 pulses delivered at 100 Hz every 10s), with intracellular injections of the Ca(2+) chelator BAPTA (20mM), and with the NMDAR antagonist D-AP5. In separate experiments, RC and MF inputs converging onto the same interneuron were sequentially activated. We found that RC LTP induction was blocked by inhibitors of the calcium/calmodulin-dependent protein kinase II (CaMKII; KN-62, 10 μM or KN-93, 10 μM) but MF LTP was CaMKII independent. Conversely, the application of the protein kinase A (PKA) activators forskolin/IBMX (50 μM/25 μM) potentiated MF EPSPs but not RC EPSPs. Together these data indicate that the aspiny dendrites of SR/L-M interneurons compartmentalize synapse-specific Ca(2+) signaling required for LTP induction at RC and MF synapses. We also show that the two signal transduction cascades converge to activate a common effector, protein kinase C (PKC). Specifically, LTP at RC and MF synapses on the same SR/LM interneuron was blocked by postsynaptic injections of chelerythrine (10 μM). These data indicate that both forms of LTP share a common mechanism involving PKC-dependent signaling modulation.
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Affiliation(s)
- E J Galván
- Departamento de Farmacobiología, Cinvestav Sede Sur, México City, Mexico.
| | - T Pérez-Rosello
- Department of Physiology, Northwestern University, Chicago, IL, USA
| | - G Gómez-Lira
- Departamento de Farmacobiología, Cinvestav Sede Sur, México City, Mexico
| | - E Lara
- Departamento de Farmacobiología, Cinvestav Sede Sur, México City, Mexico
| | - R Gutiérrez
- Departamento de Farmacobiología, Cinvestav Sede Sur, México City, Mexico
| | - G Barrionuevo
- Department of Neuroscience, University of Pittsburgh, Pittsburgh, PA, USA
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Morales N, Val del Río A, Vázquez-Padín JR, Gutiérrez R, Fernández-González R, Icaran P, Rogalla F, Campos JL, Méndez R, Mosquera-Corral A. Influence of dissolved oxygen concentration on the start-up of the anammox-based process: ELAN®. Water Sci Technol 2015; 72:520-527. [PMID: 26247749 DOI: 10.2166/wst.2015.233] [Citation(s) in RCA: 23] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The anammox-based process ELAN® was started-up in two different sequencing batch reactor (SBR) pilot plant reactors treating municipal anaerobic digester supernatant. The main difference in the operation of both reactors was the dissolved oxygen (DO) concentration in the bulk liquid. SBR-1 was started at a DO value of 0.4 mg O2/L whereas SBR-2 was started at DO values of 3.0 mg O2/L. Despite both reactors working at a nitrogen removal rate of around 0.6 g N/(L d), in SBR-1, granules represented only a small fraction of the total biomass and reached a diameter of 1.1 mm after 7 months of operation, while in SBR-2 the biomass was mainly composed of granules with an average diameter of 3.2 mm after the same operational period. Oxygen microelectrode profiling revealed that granules from SBR-2 where only fully penetrated by oxygen with DO concentrations of 8 mg O2/L while granules from SBR-1 were already oxygen penetrated at DO concentrations of 1 mg O2/L. In this way granules from SBR-2 performed better due to the thick layer of ammonia oxidizing bacteria, which accounted for up to 20% of all the microbial populations, which protected the anammox bacteria from non-suitable liquid media conditions.
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Affiliation(s)
- N Morales
- FCC Aqualia, Guillarei WWTP, Tui, E-36720, Spain E-mail:
| | - A Val del Río
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Lope Gomez de Marzoa s/n, E-15705 Santiago de Compostela, Spain
| | | | - R Gutiérrez
- FCC Aqualia, Guillarei WWTP, Tui, E-36720, Spain E-mail:
| | | | - P Icaran
- FCC Aqualia, Guillarei WWTP, Tui, E-36720, Spain E-mail:
| | - F Rogalla
- FCC Aqualia, Guillarei WWTP, Tui, E-36720, Spain E-mail:
| | - J L Campos
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Lope Gomez de Marzoa s/n, E-15705 Santiago de Compostela, Spain; Faculty of Engineering and Science, University Adolfo Ibáñez, Avda Padre Hurtado 750, Viña del Mar, Chile
| | - R Méndez
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Lope Gomez de Marzoa s/n, E-15705 Santiago de Compostela, Spain
| | - A Mosquera-Corral
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Lope Gomez de Marzoa s/n, E-15705 Santiago de Compostela, Spain
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25
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Díaz-Flores L, Gutiérrez R, García MP, González M, Sáez FJ, Aparicio F, Díaz-Flores L, Madrid JF. Human resident CD34+ stromal cells/telocytes have progenitor capacity and are a source of αSMA+ cells during repair. Histol Histopathol 2014; 30:615-27. [PMID: 25500909 DOI: 10.14670/hh-30.615] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We studied the progenitor capacity of human resident CD34+ stromal cells/telocytes (SC/TCs) in the enteric wall affected by inflammatory/repair processes (appendicitis, diverticulitis of large bowel and Crohn's disease of the terminal ileum) at different stages of evolution (inflammatory, proliferative and remodelling). In these conditions, CD34+ SC/TCs are activated, showing changes, which include the following overlapping events: 1) separation from adjacent structures (e.g., from vascular walls) and location in oedematous spaces, 2) morphological modifications (in cell shape and size) with presence of transitional cell forms between quiescent and activated CD34+ SC/TCs, 3) rapid proliferation and 4) loss of CD34 expression and gain of αSMA expression. These events mainly occur in the inflammatory and proliferative stages. During the loss of CD34 expression, the following findings are observed: a) irregular cell labelling intensity for anti-CD34, b) co-localization of CD34 and actin, c) concurrent irregular labelling intensity for αSMA and d) αSMA expression in all stromal cells, with total loss of CD34 expression. While CD34 expression was conserved, a high proliferative capacity (Ki-67 expression) was observed and vice versa. In the segments of the ileum affected by Crohn's disease, the stromal cells around fissures were αSMA+ and, in the transitional zones with normal enteric wall, activated CD34+ SC/TCs were observed. In conclusion, human resident CD34+ SC/TCs in the enteric wall have progenitor capacity and are activated with or without differentiation into αSMA+ stromal cells during inflammatory/repair processes.
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Affiliation(s)
- L Díaz-Flores
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain.
| | - R Gutiérrez
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - M P García
- Department of Pathology, Hospiten® Hospitals, Tenerife, Spain
| | - M González
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - F J Sáez
- Department of Cell Biology and Histology, UFI11/44, School of Medicine and Dentistry, University of the Basque Country, UPV/EHU, Leioa, Spain
| | - F Aparicio
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - L Díaz-Flores
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - J F Madrid
- Department of Cell Biology and Histology, School of Medicine, Regional Campus of International Excellence "Campus Mare Nostrum", IMIB-Arrixaca, University of Murcia, Murcia, Spain
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26
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Soler C, Kekäläinen J, Núñez M, Sancho M, Álvarez JG, Núñez J, Yaber I, Gutiérrez R. Male facial attractiveness and masculinity may provide sex- and culture-independent cues to semen quality. J Evol Biol 2014; 27:1930-8. [PMID: 25056484 DOI: 10.1111/jeb.12446] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 06/10/2014] [Accepted: 06/17/2014] [Indexed: 11/30/2022]
Abstract
Phenotype-linked fertility hypothesis (PLFH) predicts that male secondary sexual traits reveal honest information about male fertilization ability. However, PLFH has rarely been studied in humans. The aim of the present study was to test PLFH in humans and to investigate whether potential ability to select fertile partners is independent of sex or cultural background. We found that on the contrary to the hypothesis, facial masculinity was negatively associated with semen quality. As increased levels of testosterone have been demonstrated to impair sperm production, this finding may indicate a trade-off between investments in secondary sexual signalling (i.e. facial masculinity) and fertility or status-dependent differences in investments in semen quality. In both sexes and nationalities (Spanish and Colombian), ranked male facial attractiveness predicted male semen quality. However, Spanish males and females estimated facial images generally more attractive (gave higher ranks) than Colombian raters, and in both nationalities, males gave higher ranks than females. This suggests that male facial cues may provide culture- and sex-independent information about male fertility. However, our results also indicate that humans may be more sensitive to facial attractiveness cues within their own populations and also that males may generally overestimate the attractiveness of other men to females.
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Affiliation(s)
- C Soler
- Departament de Biologia Funcional i Antropologia Física, Universitat de València, Burjassot, Spain
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Aguirre J, Sevilla-Escoboza R, Gutiérrez R, Papo D, Buldú JM. Synchronization of interconnected networks: the role of connector nodes. Phys Rev Lett 2014; 112:248701. [PMID: 24996113 DOI: 10.1103/physrevlett.112.248701] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Indexed: 05/07/2023]
Abstract
In this Letter we identify the general rules that determine the synchronization properties of interconnected networks. We study analytically, numerically, and experimentally how the degree of the nodes through which two networks are connected influences the ability of the whole system to synchronize. We show that connecting the high-degree (low-degree) nodes of each network turns out to be the most (least) effective strategy to achieve synchronization. We find the functional relation between synchronizability and size for a given network of networks, and report the existence of the optimal connector link weights for the different interconnection strategies. Finally, we perform an electronic experiment with two coupled star networks and conclude that the analytical results are indeed valid in the presence of noise and parameter mismatches.
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Affiliation(s)
- J Aguirre
- Centro de Astrobiología, CSIC-INTA. Carretera de Ajalvir km 4, 28850 Torrejón de Ardoz, Madrid, Spain and Grupo Interdisciplinar de Sistemas Complejos (GISC)
| | - R Sevilla-Escoboza
- Centro Universitario de los Lagos, Universidad de Guadalajara, Enrique Díaz de Leon, Paseos de la Montaña, Lagos de Moreno, Jalisco 47460, Mexico and Laboratory of Biological Networks, Center for Biomedical Technology, UPM, Pozuelo de Alarcón, 28223 Madrid, Spain
| | - R Gutiérrez
- Department of Chemical Physics, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - D Papo
- Group of Computational Systems Biology, Center for Biomedical Technology, UPM, Pozuelo de Alarcón, 28223 Madrid, Spain
| | - J M Buldú
- Laboratory of Biological Networks, Center for Biomedical Technology, UPM, Pozuelo de Alarcón, 28223 Madrid, Spain and Complex Systems Group, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
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28
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Díaz-Flores L, Gutiérrez R, García MP, Sáez FJ, Díaz-Flores L, Valladares F, Madrid JF. CD34+ stromal cells/fibroblasts/fibrocytes/telocytes as a tissue reserve and a principal source of mesenchymal cells. Location, morphology, function and role in pathology. Histol Histopathol 2014; 29:831-70. [PMID: 24488810 DOI: 10.14670/hh-29.831] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We review the morphofunctional characteristics of CD34+ stromal fibroblastic/fibrocytic cells (CD34+ SFCs) and report our observations. We consider the following aspects of CD34+ SFCs: A) The confusing terms applied to this cell type, often combining the prefix CD34 with numerous names, including fibroblasts, fibrocytes, dendrocytes, keratocytes, telocytes and stromal, dendritic, adventitial, supraadventitial, perivascular, paravascular and delimiting cells; B) Changes in their immunophenotype, e.g., loss of CD34 expression and gain of other markers, such as those defining mesenchymal and derivate cells (myofibroblasts, osteoblasts, chondroblasts, adipocytes); C) Morphology (elongated or triangular cell body and thin, moniliform, bipolar or multipolar cytoplasmic processes), immunohistochemistry (co-expression of and changes in molecular expression) and structure (characteristics of nucleus and cytoplasmic organelles, and points of contact and junctions in quiescent and activated stages by light and electron microscopy); D) Location and distribution in the vessels (adventitia or external layer), in the tissues (connective, adipose, blood, muscle and nervous) and in the organs and systems (skin, oral cavity and oropharynx, respiratory, digestive, urinary, male, female, endocrine and lymphoid systems, serosal and synovial membranes, heart, eye and meninges); E) Origin from the mesoderm and cranial neural crest in the embryo, and from stem cells (themselves or other cells) and/or peripheral blood pluripotent stem cells (circulating progenitor cells) in post-natal life; F) Functions, such as synthesis of different molecules, progenitor of mesenchymal cells, immunomodulation, parenchymal regulation (growth, maturation and differentiation of adjacent cells), induction of angiogenesis, scaffolding support of other cells and phagocytic properties. Since CD34+ SFCs are the main reservoir of tissue mesenchymal cells (great mesenchymal potential, probably higher than that proposed for pericytes and other stromal cells), we dedicate a broad section to explain their in vivo behaviour during proliferation and differentiation in different physiologic and pathologic conditions, in addition to their characteristics in the human tissues of origin (adult stem cell niches); G) Involvement in pathological processes, e.g., repair (regeneration and repair through granulation tissue), fibrosis, tumour stroma formation and possible CD34+ SFC-derived tumours (e.g., solitary fibrous tumour, dermatofibrosarcoma protuberans, giant cell fibroblastoma, nuchal-type fibroma, mammary and extramammary myofibroblastoma, spindle and pleomorphic cell lipoma, and elastofibroma) and H) Clinical and therapeutic implications.
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Affiliation(s)
- L Díaz-Flores
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain.
| | - R Gutiérrez
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - M P García
- Department of Pathology, Hospiten® Hospitals, Tenerife, Spain
| | - F J Sáez
- Department of Cell Biology and Histology, UFI11/44, School of Medicine and DentistRy, University of the Basque Country, UPV/EHU, Leioa, Spain
| | - L Díaz-Flores
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - F Valladares
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, and CIBER de Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, Spain
| | - J F Madrid
- Department of Cell Biology and Histology, School of Medicine, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Murcia, Spain
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29
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Vázquez-Padín JR, Morales N, Gutiérrez R, Fernández R, Rogalla F, Barrio JP, Campos JL, Mosquera-Corral A, Méndez R. Implications of full-scale implementation of an anammox-based process as post-treatment of a municipal anaerobic sludge digester operated with co-digestion. Water Sci Technol 2014; 69:1151-1158. [PMID: 24647178 DOI: 10.2166/wst.2013.795] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The feasibility of treating the supernatant of a municipal sludge digester supplemented with co-substrates by means of an anammox-based process (ELAN(®)) was tested in Guillarei (NW of Spain). Ammonia concentration measured in the supernatant of the sludge digester varied in the range 800-1,500 g N/m(3) due to the fact that the sludge produced in the plant was co-digested with wastes coming from surrounding food industries. Treating this supernatant in the ELAN(®) reactor, nitrogen removal rates up to 1.1 kg N/(m(3) d) were reached in experiments run in a pilot plant reactor operated in batch mode. No nitrite oxidation was registered after several months of operation despite the average dissolved oxygen (DO) concentrations being 1.5 g O2/m(3) and the temperature reaching values as low as 18 °C. By keeping the DO set point at 1-2 g O2/m(3) and tuning the hydraulic retention time, the stability of the process was guaranteed and the presence of co-substrates in the anaerobic digester did not affect negatively the operation of the autotrophic nitrogen removal process. Due to the success of the pilot plant experiment, an upscale of the process to full scale is proposed. Mass balances applied to Guillarei wastewater treatment plant revealed that in the main stream line the average denitrification rate calculated with the data of year 2011 was 226 kg N/d. Since the nitrogen removal efficiency is limited by the amount of readily biodegradable organic matter available to carry out denitrification in the water line, the implementation of an anammox-based process to treat the supernatant seems the best option to improve the effluent quality in terms of nitrogen content. The nitrogen removal rate in the sludge line would be 30 times higher than the one in the water line. The implementation of the process would improve the energetic balance and the nitrogen removal performance of the plant.
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Affiliation(s)
| | - N Morales
- Aqualia (FCC Group), Guillarei WWTP, Tui, Spain E-mail:
| | - R Gutiérrez
- Aqualia (FCC Group), Guillarei WWTP, Tui, Spain E-mail:
| | - R Fernández
- Aqualia (FCC Group), Guillarei WWTP, Tui, Spain E-mail:
| | - F Rogalla
- Aqualia (FCC Group), Guillarei WWTP, Tui, Spain E-mail:
| | - J P Barrio
- Departamento de Explotación de la EPOSH, Administración Hidráulica de Galicia, Santiago de Compostela, Spain
| | - J L Campos
- University of Santiago de Compostela, Department of Chemical Engineering, School of Engineering, Lope Gomez de Marzoa s/n, E-15782 Santiago de Compostela, Spain
| | - A Mosquera-Corral
- University of Santiago de Compostela, Department of Chemical Engineering, School of Engineering, Lope Gomez de Marzoa s/n, E-15782 Santiago de Compostela, Spain
| | - R Méndez
- University of Santiago de Compostela, Department of Chemical Engineering, School of Engineering, Lope Gomez de Marzoa s/n, E-15782 Santiago de Compostela, Spain
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30
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Gutiérrez R, Sevilla-Escoboza R, Piedrahita P, Finke C, Feudel U, Buldú JM, Huerta-Cuellar G, Jaimes-Reátegui R, Moreno Y, Boccaletti S. Generalized synchronization in relay systems with instantaneous coupling. Phys Rev E Stat Nonlin Soft Matter Phys 2013; 88:052908. [PMID: 24329332 DOI: 10.1103/physreve.88.052908] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2013] [Revised: 09/23/2013] [Indexed: 06/03/2023]
Abstract
We demonstrate the existence of generalized synchronization in systems that act as mediators between two dynamical units that, in turn, show complete synchronization with each other. These are the so-called relay systems. Specifically, we analyze the Lyapunov spectrum of the full system to elucidate when complete and generalized synchronization appear. We show that once a critical coupling strength is achieved, complete synchronization emerges between the systems to be synchronized, and at the same point, generalized synchronization with the relay system also arises. Next, we use two nonlinear measures based on the distance between phase-space neighbors to quantify the generalized synchronization in discretized time series. Finally, we experimentally show the robustness of the phenomenon and of the theoretical tools here proposed to characterize it.
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Affiliation(s)
- R Gutiérrez
- Department of Chemical Physics, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - R Sevilla-Escoboza
- Centro Universitario de los Lagos, Universidad de Guadalajara, Lagos de Moreno, Jalisco 47460, Mexico and Complex Systems Group, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - P Piedrahita
- Institute for Biocomputation and Physics of Complex Systems (BIFI), University of Zaragoza, Zaragoza 50009, Spain
| | - C Finke
- d-fine GmbH, Opernplatz 2, 60313 Frankfurt, Germany
| | - U Feudel
- ICBM, University of Oldenburg, Carl-von-Ossietzky-Strasse 9-11, 26111 Oldenburg, Germany and IPST, University of Maryland, College Park, Maryland 20742-2431, USA
| | - J M Buldú
- Complex Systems Group, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain and Center for Biomedical Technology, Technical University of Madrid, Pozuelo de Alarcón, 28223 Madrid, Spain
| | - G Huerta-Cuellar
- Centro Universitario de los Lagos, Universidad de Guadalajara, Lagos de Moreno, Jalisco 47460, Mexico
| | - R Jaimes-Reátegui
- Centro Universitario de los Lagos, Universidad de Guadalajara, Lagos de Moreno, Jalisco 47460, Mexico
| | - Y Moreno
- Institute for Biocomputation and Physics of Complex Systems (BIFI), University of Zaragoza, Zaragoza 50009, Spain and Department of Theoretical Physics, University of Zaragoza, Zaragoza 50009, Spain and Complex Networks and Systems Lagrange Lab, Institute for Scientific Interchange, Turin, Italy
| | - S Boccaletti
- CNR Institute of Complex Systems, Via Madonna del Piano, 10, 50019 Sesto Fiorentino, Florence, Italy
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31
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Benajiba A, Aniceto GS, Zubillaga I, Gutiérrez R, Falguera M. Predicting factors for posttraumatic diplopia in patients with orbital wall fractures undergoing surgery: preliminary results of a prospective study. Int J Oral Maxillofac Surg 2013. [DOI: 10.1016/j.ijom.2013.07.173] [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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32
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Barros LF, San Martín A, Sotelo-Hitschfeld T, Lerchundi R, Fernández-Moncada I, Ruminot I, Gutiérrez R, Valdebenito R, Ceballo S, Alegría K, Baeza-Lehnert F, Espinoza D. Small is fast: astrocytic glucose and lactate metabolism at cellular resolution. Front Cell Neurosci 2013; 7:27. [PMID: 23526722 PMCID: PMC3605549 DOI: 10.3389/fncel.2013.00027] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Accepted: 03/03/2013] [Indexed: 12/28/2022] Open
Abstract
Brain tissue is highly dynamic in terms of electrical activity and energy demand. Relevant energy metabolites have turnover times ranging from milliseconds to seconds and are rapidly exchanged between cells and within cells. Until recently these fast metabolic events were inaccessible, because standard isotopic techniques require use of populations of cells and/or involve integration times of tens of minutes. Thanks to fluorescent probes and recently available genetically-encoded optical nanosensors, this Technology Report shows how it is now possible to monitor the concentration of metabolites in real-time and in single cells. In combination with ad hoc inhibitor-stop protocols, these probes have revealed a key role for K+ in the acute stimulation of astrocytic glycolysis by synaptic activity. They have also permitted detection of the Warburg effect in single cancer cells. Genetically-encoded nanosensors currently exist for glucose, lactate, NADH and ATP, and it is envisaged that other metabolite nanosensors will soon be available. These optical tools together with improved expression systems and in vivo imaging, herald an exciting era of single-cell metabolic analysis.
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Affiliation(s)
- L F Barros
- Centro de Estudios Científicos Valdivia, Chile
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33
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Lee MH, Brancolini G, Gutiérrez R, Di Felice R, Cuniberti G. Probing charge transport in oxidatively damaged DNA sequences under the influence of structural fluctuations. J Phys Chem B 2012; 116:10977-85. [PMID: 22679932 DOI: 10.1021/jp2091544] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We present a detailed study of the charge transport characteristics of double-stranded DNA oligomers including the oxidative damage 7,8-dihydro-8-oxoguanine (8-oxoG). The problem is treated by a hybrid methodology combining classical molecular dynamics simulations and semiempirical electronic structure calculations to formulate a coarse-grained charge transport model. The influence of solvent- and DNA-mediated structural fluctuations is encoded in the obtained time series of the electronic charge transfer parameters. Within the Landauer approach to charge transport, we perform a detailed analysis of the conductance and current time series obtained by sampling the electronic structure along the molecular dynamics trajectory, and find that the inclusion of 8-oxoG damages into the DNA sequence can induce a change in the electrical response of the system. However, solvent-induced fluctuations tend to mask the effect, so that a detection of such sequence modifications via electrical transport measurements in a liquid environment seems to be difficult to achieve.
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Affiliation(s)
- M H Lee
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany
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34
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Díaz-Flores L, Gutiérrez R, García MP, Díaz-Flores L, Valladares F, Madrid JF. Ultrastructure of myopericytoma: a continuum of transitional phenotypes of myopericytes. Ultrastruct Pathol 2012; 36:189-94. [PMID: 22559047 DOI: 10.3109/01913123.2012.655855] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The authors report the ultrastructural characteristics of myopericytoma, a recently described variant of perivascular (pericytic) tumors, mainly with regard to their myopericytic cells and vessels. Myopericytes range between pericytes and vascular smooth muscle cells (SMCs) in a morphologic continuum. The principal findings of the intermediate phenotypes are (1) elongated or annular morphology with processes of varying length and thickness (usually long and thin); (2) a continuous, irregularly thickened and zonally duplicated basement membrane; (3) heterocellular "peg and socket" junctions with neighboring endothelial cells, and scarce specialized junctions between myopericytes; (4) numerous micropinocytotic vesicles, whether continuous or forming focal rows; (5) abundant thin microfilaments, grouped in bundles with dense bodies and adhesion plaques; (6) poorly developed synthetic system (RER and Golgi); (7) pseudointracellular bodies formed by invagination of basement and plasma membranes, with numerous endocytic vesicles; and (8) zones of cytoplasmic rarefaction near micropinocytotic vesicles and intracellular organelles. The ultrastructure of myopericytes therefore makes it possible to distinguish them from pericytes, SMCs, and fibroblast/myofibroblasts, which is useful for myopericytoma diagnosis. The main pattern of the vessels, with perivascular concentric and multilayered growth of myopericytes (a thick wall in contrast to a small lumen) and lack of elastic material, also supports an intermediate form between pericytic and muscular microvasculature. The presence of myopericytes more similar to SMCs and of hemangiopericytoma-like vessels concurs with transitional forms with angioleyomyoma and true hemangiopericytoma, histogenetically representing a morphologic continuum for the perivascular tumors.
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Affiliation(s)
- L Díaz-Flores
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain.
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35
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Gutiérrez R, Vega S, Radilla C, Radilla M, Ramírez A, Pérez JJ, Schettino B, Ramírez ML, Ortiz R, Fontecha J. La importancia de los ácidos grasos en la leche materna y en las fórmulas lácteas. Grasas y Aceites 2012. [DOI: 10.3989/gya.083411] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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36
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Pérez D, Sharma P, Ortiz AM, Cabrera A, Hernández S, Toscano A, Gutiérrez R. Synthesis, Characterization and Crystal Structures of 1,2-Disubstituted Ferrocenyl Stibines. Z Naturforsch B 2012. [DOI: 10.5560/znb.2012.67b0036] [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] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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37
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Gutiérrez R, Amann A, Assenza S, Gómez-Gardeñes J, Latora V, Boccaletti S. Emerging meso- and macroscales from synchronization of adaptive networks. Phys Rev Lett 2011; 107:234103. [PMID: 22182093 DOI: 10.1103/physrevlett.107.234103] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Indexed: 05/07/2023]
Abstract
We consider a set of interacting phase oscillators, with a coupling between synchronized nodes adaptively reinforced, and the constraint of a limited resource for a node to establish connections with the other units of the network. We show that such a competitive mechanism leads to the emergence of a rich modular structure underlying cluster synchronization, and to a scale-free distribution for the connection strengths of the units.
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Affiliation(s)
- R Gutiérrez
- Centre for Biomedical Technology, Technical University of Madrid, Pozuelo de Alarcón, 28223 Madrid, Spain
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38
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Díaz-Flores L, Gutiérrez R, Madrid JF, Sáez FJ, Valladares F, Villar J, Díaz-Flores L. Peg-and-socket junctions between smooth muscle cells and endothelial cells in femoral veins are stimulated to angiogenesis by prostaglandin E₂ and glycerols. Histol Histopathol 2011; 26:623-30. [PMID: 21432778 DOI: 10.14670/hh-26.623] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The administration of prostaglandin (PG) E2, triacetylglycerol and glycerol induce the formation of numerous vascular buds arising from the femoral vein, as previously demonstrated by our group. In the present study, a great number of peg-and-socket junctions (PSJs) between smooth muscle cells (SMCs) (providing the pegs) and ECs (forming the sockets) were demonstrated. At the first stage, days 1 to 3, PSJs connect subendothelial penetrating processes from activated SMCs with activated ECs of the intima. Subsequently, during angiogenesis (days 4 to 6), SMCs, showing transitional aspects with pericytes, also form PSJs with intimal ECs, but also new PSJs between SMCs and sprouting ECs in the media layer were now observed. Immunohistochemically, α-smooth muscle actin (α-SMA) and H-caldesmon are positive in the cytoplasm of the SMCs, showing a higher expression in pegs. Desmin, however, although it is also positive in the cytoplasm of the SMCs, is negative in the pegs. The expression of CD34 in ECs reveals abundant positive folding that appears to correspond to the sockets. The peculiar expression of caldesmon, whose isoforms may contribute to the regulation of cell motility, and to vasculogenesis and angiogenesis, may have a role in the different mechanisms by which PSJs act in the vein wall.
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Affiliation(s)
- L Díaz-Flores
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain
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39
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Salamanca G, Ipsen H, Gutiérrez R, Monsalve R. Recombinant doubly-deglycosylated Der p 1 expression in Pichia pastoris. J Allergy Clin Immunol 2011. [DOI: 10.1016/j.jaci.2010.12.664] [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: 11/28/2022]
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40
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Puertas F, Gutiérrez R, Fernández-Jiménez A, Delvasto S, Maldonado J. Morteros de cementos alcalinos. Resistencia química al ataque por sulfatos y al agua de mar. ACTA ACUST UNITED AC 2010. [DOI: 10.3989/mc.2002.v52.i267.326] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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41
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Díaz-Flores L, Gutiérrez R, Madrid JF, Alvarez-Argüelles H, Valladares F, Spreafico M, Díaz-Flores L. Choroid plexus papilloma with stromal deposition of amyloid and elastic material. Amyloid 2010; 17:69-74. [PMID: 20462365 DOI: 10.3109/13506129.2010.483117] [Citation(s) in RCA: 14] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Congophilic birefringent amyloid deposits, with immunostaining for transthyretin (TTR) and amyloid P, associated with numerous coarse, enlarged and thick elastic fibres, are reported in the stroma of two choroid plexus papillomas, a finding not previously described in choroid plexus tumours. TTR was expressed as aggregates of 'doughnut-shaped' bodies, in which the TTR-positive peripheral area encircled the elastic fibre (TTR-negative core). Ultrastructurally, the amyloid microfibrils surrounded the elastic fibres and appeared to continue into the microfibrillar mantle of the latter. The stromal TTR-amyloid deposits associated with abundant elastic fibres in tumours that occur in the choroid plexus may be related to the alteration (production/accumulation, insufficient breakdown and/or extracellular matrix modifications) of some of the choroid plexus functions (removal, target and source of polypeptides, including TTR synthesis) and may be of interest for future studies on choroid plexus polypeptide activity and on protein development into elastomeric and amyloidogenic microfibrils.
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Affiliation(s)
- L Díaz-Flores
- Faculty of Medicine, Department of Anatomy, University of La Laguna, Tenerife, Spain.
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42
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Sandoval CM, Ortiz N, Jaimes D, Lorosa E, Galvão C, Rodriguez O, Scorza JV, Gutiérrez R. Feeding behaviour of Belminus ferroae (Hemiptera: Reduviidae), a predaceous Triatominae colonizing rural houses in Norte de Santander, Colombia. Med Vet Entomol 2010; 24:124-131. [PMID: 20408957 DOI: 10.1111/j.1365-2915.2010.00868.x] [Citation(s) in RCA: 24] [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] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Belminus ferroae (Hemiptera: Reduviidae) was collected from houses in the localities of San Alberto and Santa Catalina in the municipality of Toledo, Department of Norte de Santander, Colombia. Precipitin tests revealed that the main hosts of B. ferroae are insects belonging to the order Blattodea, whose haemolymph serves as food (89.43%). A low rate of haematophagy was indicated on rodents, dogs and humans (7.32%) and no natural infection with Trypanosoma cruzi was found by either microscopic examination or polymerase chain reaction. The finding of B. ferroae inside houses, feeding primarily on Blattodea with only a minor tendency to feed on vertebrate blood, is indicative of both the evolutionary path from predator to blood-sucker taken by Triatominae and their tendency to adapt from silvatic to domestic habitats.
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Affiliation(s)
- C M Sandoval
- Laboratorio de Entomologia Médica, Instituto de Investigaciones en Ciencias Biomédicas (INBIOM), Universidad de Pamplona, Pamplona, Norte de Santander 1050, Colombia.
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Ramos-Brieva JR, Cordero A, Gutiérrez R, Zamarro M. The Axial Diagnostic Criteria for Depression. Development, construct and predictive validity and reliability. Actas Esp Psiquiatr 2009; 37:306-319. [PMID: 20066582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
INTRODUCTION The authors have developed a new axial diagnostic criterion for depression (ADCD) made up of seven items: mood, motivation/interest, impulse/drive, liking/pleasure, daily job, energy and different quality. They have aimed to examine its predictive validity and reliability, psychometric properties and constructive validity. There are few studies that have examined the psychometric properties of other diagnostic criteria for depression currently in use. MATERIAL AND METHODS A total of 111 psychiatric outpatients who attended an out-patient clinic consecutively were interviewed. Sixty met the ICD-10 criteria for depressive episode and 51 formed a part of the control group: non-depressed psychiatric outpatients. For the interview, the authors used a brief self-administered questionnaire (IDASD) in which the patients indicated how they felt. Each item had a Visual Analogue Scale so that the subjects could quantify their answers. RESULTS Four or more items are needed for the ADCD to correctly diagnose depression. At least two of these should belong to a group of three items that were extracted using a discriminant function (mood, energy and different quality). The ADCD constructed in this way has a 0.93 sensitivity and 0.82 specificity, with a kappa reliability of 0.76 and a proportion of total cases correctly classified ranging from 88% to 93%. Specificity reaches up to 0.92 when the control group is formed exclusively by symptom-free psychiatric outpatients. A factor analysis reveals that the ADCD is a one-dimensional model that has good construct validity (0.69). It also has good alpha reliability (alpha = 0.92), elevated consistency of the two halves of the test (R = 0.91) and a high test-retest correlation (r = 0.67). The ADCD diagnostic agreement between two psychiatrists who use the IDASD as a data source is very high (kappa: 1.00). CONCLUSIONS The ADCD/IDASD system offers a valid and reliable procedure to diagnose depression. It also has an excellent internal architecture, good construct validity and internal consistency. These data are much more than what can be said about other more used diagnostic criteria, which lack this information.
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Affiliation(s)
- Jesús Ramos Ramos-Brieva
- Psychiatry Department, Hospital Universitario Ramón y Cajal, Universidad de Alcalá, Madrid, Spain.
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Díaz-Flores L, Gutiérrez R, Madrid JF, Varela H, Valladares F, Acosta E, Martín-Vasallo P, Díaz-Flores L. Pericytes. Morphofunction, interactions and pathology in a quiescent and activated mesenchymal cell niche. Histol Histopathol 2009; 24:909-69. [PMID: 19475537 DOI: 10.14670/hh-24.909] [Citation(s) in RCA: 241] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We review the morphofunctional characteristics of pericytes and report our observations. After a brief historical background, we consider the following aspects of pericytes: A) Origin in embryonic vasculogenesis (mesenchymal stem cells, neurocrest and other possible sources) and in embryonic and postnatal life angiogenesis (pre-existing pericytes, fibroblast/ myofibroblasts and circulating progenitor cells). B) Location in pericytic microvasculature and in the other blood vessels (including transitional cell forms and absence in lymphatic vessels), incidence (differences depending on species, topographical location, and type and stage of vessels) and distribution (specific polarities) in blood vessels. C) Morphology (cell body, and longitudinal and circumferential cytoplasmic processes), structure (nucleus, cytoplasmic organelles and distribution of microtubules, intermediate filaments and microfilaments) and surface (caveolae system). D) Basement membrane disposition, formation, components and functions. E) Contacts with endothelial cells (ECs) (peg and socket arrangements, adherent junctions and gap junctions) and with basal membrane (adhesion plaques). F) Molecular expression (pericyte marker identification). G) Functions, such as vessel stabilization, regulation of vascular tone and maintenance of local and tissue homeostasis (contractile capacity and vessel permeability regulation), matrix protein synthesis, macrophage-like properties, immunological defense, intervention in coagulation, participation in mechanisms that regulate the quiescent and angiogenic stages of blood vessels (including the behaviour of pericytes during sprouting angiogenesis and intussuceptive vascular growth, as well as pericyte interactions with endothelium and other cells, and with extracellular matrix) and plasticity, as progenitor cells with great mesenchymal potential, originating other pericytes, fibroblast/myofibroblasts, preadipocytes, chondroblasts, osteoblasts, odontoblasts, vascular smooth muscle and myointimal cells. This mesenchymal capacity is seen in a broad section on the perivascular mesenchymal cell niche hypothesis and in the concept of pericyte and EC "marriage and divorce". H) Peculiar pericyte types, such as hepatic stellate cells (Ito cells), bone marrow reticular cells and mesangial cells. I) Involvement in pathological processes, such as repair through granulation tissue, pericyte-derived tumors, tumor angiogenesis and tumoral cell metastasis, diabetic microangiopathy, fibrosis, atherosclerosis and calcific vasculopathy, lymphedema distichiasis, chronic venous insufficiency, pulmonary hypertension, Alzheimer disease and multiple sclerosis. J) Clinical and therapeutic implications (de-stabilization of vessels or formation of a stable vasculature).
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Affiliation(s)
- L Díaz-Flores
- Department of Anatomy, Pathology, Histology and Radiology, Faculty of Medicine, University of La Laguna, Tenerife, Spain
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Ramos JA, Cordero A, Gutiérrez R, Zamarro ML. [Symptoms that contribute to the perception of depressive symptom intensity. A preliminary study]. Actas Esp Psiquiatr 2009; 37:191-195. [PMID: 19927230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
INTRODUCTION Psychiatrists use few symptoms when diagnosing depression. This study has aimed to know what symptoms are used by the psychiatrists to evaluate the severity of a depressive person compared to how they are evaluated when using a standardized instrument such as Hamilton's Rating Scale for Depression (HRSD-17). METHODOLOGY A total of 100 depressed outpatients attended consecutively who met the ICD-10 criteria for depressive episode, dysthymia or adjustment disorders depressive types were studied. The depressed outpatients expressed their clinical situation on a Visual Analogue Scale (VAS) whose extreme values were the adjectives WELL and BAD. The psychiatrist evaluated them using a Clinical Global Impression (CGI) scale on the state of the patient's depressed mood, and Hamilton's Rating Scale for Depression (HRSD-17). The total scores obtained with those instruments and with the partial scores of the melancholic and anxious factors of the HRSD-17 were correlated (Pearson's R). RESULTS Psychiatrists give more importance to melancholic symptoms than to anxious ones to establish the severity of a depressed outpatient. Depressed outpatients give the same importance to their anxious and melancholic symptoms. In addition, the total score of the HRSD-17 is more influenced and shares a larger variance proportion with anxious symptoms than with melancholic ones. All the correlations calculated are statistically significant (p = 0.000). CONCLUSIONS The authors discuss the influence that the HRSD-17 can have on seemingly precocious results offered by some clinical trials of antidepressants drugs.
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Affiliation(s)
- J A Ramos
- Servicio de Psiquiatría, Hospital Ramón y Cajal, Ctra. Colmenar km 9,100, E-28034 Madrid, Spain.
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Pulido T, Sandoval J, Roquet I, Gutiérrez R, Rueda T, Peña H, Santos E, Miranda MT, Lupi E. Interaction of acenocoumarol and sitaxentan in pulmonary arterial hypertension. Eur J Clin Invest 2009; 39 Suppl 2:14-8. [PMID: 19335742 DOI: 10.1111/j.1365-2362.2009.02116.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Sitaxentan inhibits the metabolism of warfarin, resulting in a need for adjustment of warfarin dose when both drugs are coadministered. We report the long-term effects on bleeding of acenocoumarol co-administered as part of conventional therapy for pulmonary hypertension with sitaxentan in a subset of patients enrolled in the Sitaxentan To Relieve ImpaireD Exercise-3 (STRIDE-3) study. MATERIALS AND METHODS STRIDE-3 is an ongoing, long-term, open-label trial, evaluating the safety and efficacy of sitaxentan, 100 mg once daily, in patients with pulmonary arterial hypertension. Information on bleeding events was collected prospectively, including the type of event, severity, anticoagulant use and investigator attribution of causality. Coagulation tests were performed on a monthly basis. A clinically significant interaction was defined as an international normalized ratio (INR) >/= 5.0, or any minor bleeding event plus an INR > 2.0 and < 5.0. RESULTS Of 55 patients enrolled in STRIDE-3, 50 received acenocoumarol. Average follow-up was 158.6 +/- 57.6 weeks. The average dose of anticoagulant therapy was 3.9 +/- 1.3 mg week(-1) (range, 1.5-7.0 mg week(-1)). Following treatment, an INR >/= 5 in at least one INR determination was observed in 13 patients, although none of these patients had a clinically significant bleeding event. Dose reductions in acenocoumarol were performed to adjust target INR to 1.5-2.0. Two patients died of massive haemoptysis, but these episodes were not attributed to a drug interaction. Four patients with an INR > 2.0 and < 5.0 experienced a minor bleeding event (nosebleeds/gingivitis). CONCLUSIONS No clinically significant bleeding events were recorded with coadministration of sitaxentan and acenocoumarol in this patient subgroup. These results suggest that coadministration of sitaxentan and acenocoumarol is clinically manageable and well tolerated.
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Affiliation(s)
- T Pulido
- Cardiopulmonary Department, National Heart Institute, Mexico City, Mexico.
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Gutiérrez R, Caetano RA, Woiczikowski BP, Kubar T, Elstner M, Cuniberti G. Charge transport through biomolecular wires in a solvent: bridging molecular dynamics and model Hamiltonian approaches. Phys Rev Lett 2009; 102:208102. [PMID: 19519078 DOI: 10.1103/physrevlett.102.208102] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2009] [Indexed: 05/27/2023]
Abstract
We present a hybrid method based on a combination of classical molecular dynamics simulations, quantum-chemical calculations, and a model Hamiltonian approach to describe charge transport through biomolecular wires with variable lengths in presence of a solvent. The core of our approach consists in a mapping of the biomolecular electronic structure, as obtained from density-functional based tight-binding calculations of molecular structures along molecular dynamics trajectories, onto a low-dimensional model Hamiltonian including the coupling to a dissipative bosonic environment. The latter encodes fluctuation effects arising from the solvent and from the molecular conformational dynamics. We apply this approach to the case of pG-pC and pA-pT DNA oligomers as paradigmatic cases and show that the DNA conformational fluctuations are essential in determining and supporting charge transport.
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Affiliation(s)
- R Gutiérrez
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, D-01062, Dresden, Germany
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Gutiérrez R, Vega S, Díaz G, Sánchez J, Coronado M, Ramírez A, Pérez J, González M, Schettino B. Detection of non-milk fat in milk fat by gas chromatography and linear discriminant analysis. J Dairy Sci 2009; 92:1846-55. [DOI: 10.3168/jds.2008-1624] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Gutiérrez R, Gutiérrez-Sánchez R, Nafidi A, Ramos E. Three-parameter stochastic lognormal diffusion model: statistical computation and simulating annealing – application to real case. J STAT COMPUT SIM 2009. [DOI: 10.1080/00949650701550622] [Citation(s) in RCA: 2] [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: 10/21/2022]
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Reyes R, Valladares F, Gutiérrez R, González M, Bello AR. Immunohistochemical distribution of regulatory peptides in the human fetal adenohypophysis. J Anat 2008; 212:817-26. [PMID: 18510508 DOI: 10.1111/j.1469-7580.2008.00906.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
We have studied here the cellular distribution of several regulatory peptides in hormone-producing cells of the human pituitary during the fetal period. Immunohistochemistry was used to show the expression of several regulatory peptides, namely Angiotensin-II, Neurotensin and Galanin, at successive gestational stages and their co-localization with hormones in the human fetal adenohypophysis. Somatotrophs, gonadotrophs and thyrotrophs were differentiated earliest. At gestational week 9, Angiotensin-II immunoreactivity was co-localized only with growth hormone immunoreactivity in somatotrophs, one of the first hormone-producing cells to differentiate. This co-localization remained until week 37. Neurotensin immunoreactivity was present in gonadotrophs and thyrotrophs in week 23, after FSH and TSH hormone differentiation. Galanin immunoreactivity was present in all hormone-producing cell types except corticotrophs. The different pro-opiomelanocortin-derived peptides were detected at different stages of gestation and adrenocorticotrophic hormone immunoreaction was the last to be detected. Our results show an interesting relationship between regulatory peptides and hormones during human fetal development, which could imply that these peptides play a regulatory role in the development of pituitary function.
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Affiliation(s)
- R Reyes
- Section of Cell Biology, School of Biology, University of La Laguna and FICIC, La Laguna, Tenerife, Spain
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