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Aguilera-Correa JJ, Salinas B, González-Arjona M, de Pablo D, Muñoz P, Bouza E, Fernández Aceñero MJ, Esteban J, Desco M, Cussó L. Positron Emission Tomography-Computed Tomography and Magnetic Resonance Imaging Assessments in a Mouse Model of Implant-Related Bone and Joint Staphylococcus aureus Infection. Microbiol Spectr 2023; 11:e0454022. [PMID: 37010409 PMCID: PMC10269916 DOI: 10.1128/spectrum.04540-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 03/04/2023] [Indexed: 04/04/2023] Open
Abstract
Osteomyelitis is an infection of the bone, associated with an inflammatory process. Imaging plays an important role in establishing the diagnosis and the most appropriate patient management. However, data are lacking regarding the use of preclinical molecular imaging techniques to assess osteomyelitis progression in experimental models. This study aimed to compare structural and molecular imaging to assess disease progression in a mouse model of implant-related bone and joint infections caused by Staphylococcus aureus. In SWISS mice, the right femur was implanted with a resorbable filament impregnated with S. aureus (infected group, n = 10) or sterile culture medium (uninfected group, n = 6). Eight animals (5 infected, 3 uninfected) were analyzed with magnetic resonance imaging (MRI) at 1, 2, and 3 weeks postintervention, and 8 mice were analyzed with [18F]fluorodeoxyglucose (FDG)-positron emission tomography (PET)-computed tomography (CT) at 48 h and at 1, 2, and 3 weeks postintervention. In infected animals, CT showed bone lesion progression, mainly in the distal epiphysis, although some uninfected animals presented evident bone sequestra at 3 weeks. MRI showed a lesion in the articular area that persisted for 3 weeks in infected animals. This lesion was smaller and less evident in the uninfected group. At 48 h postintervention, FDG-PET showed higher joint uptake in the infected group than in the uninfected group (P = 0.025). Over time, the difference between groups increased. These results indicate that FDG-PET imaging was much more sensitive than MRI and CT for differentiating between infection and inflammation at early stages. FDG-PET clearly distinguished between infection and postsurgical bone healing (in uninfected animals) from 48 h to 3 weeks after implantation. IMPORTANCE Our results encourage future investigations on the utility of the model for testing different therapeutic procedures for osteomyelitis.
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Affiliation(s)
- J. J. Aguilera-Correa
- Departamento de Química en Ciencias Farmacéuticas. Universidad Complutense de Madrid, Madrid, Spain
- CIBERINFEC-CIBER de Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain
| | - B. Salinas
- Unidad de Medicina y Cirugía Experimenta, Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain
- CIBER de Salud Mental, Instituto de Salud Carlos III. Madrid, Spain
| | - M. González-Arjona
- Unidad de Medicina y Cirugía Experimenta, Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain
| | - D. de Pablo
- Servicio de Anatomía Patológica Hospital Clínico San Carlos, Fundación para la Investigación Biomédica HCSC, Madrid, Spain
| | - P. Muñoz
- Servicio de Microbiología y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- Departamento de Medicina, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
- CIBER Enfermedades Respiratorias, CIBERES, Madrid, Spain
| | - E. Bouza
- Servicio de Microbiología y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- Departamento de Medicina, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
- CIBER Enfermedades Respiratorias, CIBERES, Madrid, Spain
| | - M. J. Fernández Aceñero
- Servicio de Anatomía Patológica Hospital Clínico San Carlos, Fundación para la Investigación Biomédica HCSC, Madrid, Spain
| | - J. Esteban
- CIBERINFEC-CIBER de Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain
- Clinical Microbiology Department, IIS-Fundacion Jimenez Diaz, UAM, Madrid, Spain
| | - M. Desco
- Unidad de Medicina y Cirugía Experimenta, Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain
- CIBER de Salud Mental, Instituto de Salud Carlos III. Madrid, Spain
| | - L. Cussó
- Unidad de Medicina y Cirugía Experimenta, Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain
- CIBER de Salud Mental, Instituto de Salud Carlos III. Madrid, Spain
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Gould S, Freeman J, Salinas B, Crisman R. Overcoming ex vivo cell therapy manufacturing challenges through an in vivo lentiviral platform: scalability, supply chain, and cogs. Cytotherapy 2021. [DOI: 10.1016/s1465324921005429] [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: 10/21/2022]
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Martinez Milla J, Galan-Arriola C, Perez-Camargo D, Lobo M, Salinas B, Gonzalez D, Carnero M, Cobiella J, Mateo-Castro J, Vilchez JP, Cusso L, Lopez GJ, Fuster V, Desco M, Ibanez B. P5999Heart failure rescue by high fat diet in a porcine model of hibernated myocardium. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0720] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Extensive coronary artery disease without revascularization options results in ischemic hibernated myocardium and ultimately heart failure (HF). A metabolic reprogramming of the heart characterized by a shift from fatty acids (FFA) to glucose as the preferential metabolic substrate is frequent in HF and hibernated myocardium. Previous studies in mouse models of HF have shown that high fat diet (HFD) is able to reverse the metabolic reprogramming of the heart and improve cardiac function. Here we used a translational large animal model of ischemic HF evaluated by state-of-the-art imaging modalities
Methods
IHM was generated in Yucatan minipigs (N=50) by progressive stenosis of the proximal left anterior descending (LAD) after surgical insertion of a casein ameroid around the artery. Pigs underwent a serial multimodality imaging study including magnetic resonance imaging (MRI), multi-tracer PET/CT (18FDG & 14(R,S)-[18F]Fluoro-6-thia-heptadecanoic acid (18F-FTHA) 19F-palmitate in-house synthetized), and invasive coronary angiography (ICA). Once hibernated myocardium with metabolic switch was documented (complete occlusion of LAD, LVEF<50% on MRI, viable myocardium with dobutamine/MRI- evaluated contractile reserve, and metabolic substrate utilization shift towards glucose on PET/CT), animals were randomized to HFD or regular diet for 3 months
Results
The first part of the study was dedicated to establish the model in 42 pigs. Pigs were followed-up for 170±24 days with monthly ICA, MRI and PET/CT. Severe LAD stenosis was documented in all pigs 3–4 weeks after surgery. Mortality during follow-up was 57% (n=24) (15 peri-procedure, 2 between day 1 and 7, seven between day 7 and 45). Among those surviving beyond the sixth week, 90% (16/18) developed hibernated myocardium (mean LVEF 36±10%, absence of transmural delayed enhancement, contractile reserve and metabolic switch on PET/CT).
In the second part of the study, 5 long-term survivors were allocated to receive HFD (20% extra lard), while 3 pigs served as controls. Mean LVEF before HFD initiation was 35±8%, and 36±5% in controls. Three months HFD was associated with a LVEF improvement in all treated animals (mean LVEF at the end of follow-up was 45±9%). Control animals on regular diet did not show any change in LVEF (35±5% at the end of follow-up)
Conclusions
We present a large animal model of HF due hibernated myocardium by placing an ameroid around the LAD. Mortality of this model is high (approx. 55%) but long-term survivors resemble all features seen in patients: LAD progressive stenosis with final occlusion but viable myocardium, LVEF deterioration and metabolic switch
Feeding pigs with HFD to force cardiac reutilization of FFA, results in a consistent and large LVEF improvement in all animals
Cardiac metabolic switch might be implicated in the pathogenesis of systolic dysfunction in hibernated myocardium and is a potential target for nutritional approaches
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Affiliation(s)
- J Martinez Milla
- National Centre for Cardiovascular Research (CNIC), Madrid, Spain
| | - C Galan-Arriola
- National Centre for Cardiovascular Research (CNIC), Madrid, Spain
| | | | - M Lobo
- National Centre for Cardiovascular Research (CNIC), Madrid, Spain
| | - B Salinas
- University Hospital Gregorio Maranon, Madrid, Spain
| | - D Gonzalez
- Hospital Clinico Universitario, Salamanca, Spain
| | - M Carnero
- Hospital Clinic San Carlos, Madrid, Spain
| | - J Cobiella
- Hospital Clinic San Carlos, Madrid, Spain
| | - J Mateo-Castro
- National Centre for Cardiovascular Research (CNIC), Madrid, Spain
| | - J P Vilchez
- National Centre for Cardiovascular Research (CNIC), Madrid, Spain
| | - L Cusso
- University Hospital Gregorio Maranon, Madrid, Spain
| | - G J Lopez
- National Centre for Cardiovascular Research (CNIC), Madrid, Spain
| | - V Fuster
- National Centre for Cardiovascular Research (CNIC), Madrid, Spain
| | - M Desco
- University Hospital Gregorio Maranon, Madrid, Spain
| | - B Ibanez
- National Centre for Cardiovascular Research (CNIC), Madrid, Spain
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Salinas B, Ruiz-Cabello J, Morales MP, Herranz F. Olefin metathesis for the functionalization of superparamagnetic nanoparticles. Bioinspired, Biomimetic and Nanobiomaterials 2012. [DOI: 10.1680/bbn.12.00001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Linhares AC, Ruiz-Palacios GM, Guerrero ML, Salinas B, Perez-Schael I, Clemens SAC, Innis B, Yarzabal JP, Vespa G, Cervantes Y, Hardt K, De Vos B. A short report on highlights of world-wide development of RIX4414: A Latin American experience. Vaccine 2006; 24:3784-5. [PMID: 16098636 DOI: 10.1016/j.vaccine.2005.07.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An oral, human-derived monovalent (G1P1A) rotavirus vaccine, strain RIX4414, has been developed by GlaxoSmithKline, Rixensart, Belgium. The safety, immunogenicity and efficacy of this vaccine were evaluated in a randomized, double-blind, placebo-controlled, phase IIb trial conducted in Brazil, Mexico and Venezuela. Healthy infants were given two doses of vaccine (104.7, 105.2 or 105.8 ffu) or placebo at age 2 and 4 months, with routine DTPw-HBV and Hib vaccines. OPV was given separately, at least 2 weeks before or after administration of the study vaccine. A total of 2155 infants were enrolled, of whom 1618 received one of the three vaccine viral concentrations and 537 were given placebo. Analysis of efficacy included diarrheal episodes occurring from 2 weeks after second dose until one year of age. Efficacy rates against any rotavirus gastroenteritis, severe rotavirus gastroenteritis and hospitalizations for rotavirus disease were as high as 70% (46-84%; 95%CI), 86% (63-96%; 95%CI), and 93% (54-100%; 95%CI), respectively. For non-G1 (mainly G9) serotypes, RIX4414 vaccine conferred protection as high as 83% (40-97%; 95%CI) against severe gastroenteritis. A decrease was noted in the incidence of severe rotavirus-related gastroenteritis after first dose. It is demonstrated that two doses of RIX4414 are highly efficacious against severe rotavirus gastroenteritis and hospitalization, including disease caused by non-G1 strains, namely G9 serotypes.
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Affiliation(s)
- A C Linhares
- Instituto Evandro Chagas, Secretaria de Vigilância em Saúde, MS, Av. Almirante Barroso, 492, Marco CEP 66.090-000, Belém, Pará, Brazil.
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O'Ryan M, Pérez-Schael I, Mamani N, Peña A, Salinas B, González G, González F, Matson DO, Gómez J. Rotavirus-associated medical visits and hospitalizations in South America: a prospective study at three large sentinel hospitals. Pediatr Infect Dis J 2001; 20:685-93. [PMID: 11465841 DOI: 10.1097/00006454-200107000-00009] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Knowledge of the impact of rotavirus-associated disease on the health care systems of South America can aid in defining strategies for diagnosis, management and prevention. Up to date information on the impact of rotavirus disease in South America is scarce. AIM To determine prospectively the impact of rotavirus disease as a cause of medical visits and hospitalizations at three large sentinel pediatric hospitals in Argentina, Chile and Venezuela. METHODS A 2-year prospective surveillance for rotavirus-associated medical visits and hospitalizations was conducted during 1997 through 1998 at three large sentinel public hospitals, one each in Argentina, Chile and Venezuela. A common surveillance protocol was implemented at the three sites, and a representative number of nonbloody diarrhea stool samples from children <36 months of age were tested for rotavirus by enzyme-linked immunosorbent assay. RESULTS For our target age group, acute diarrhea-associated medical visits/hospitalizations represented 41%/2%, 5%/6% and 9%/13% of all medical visits/all hospitalizations at the Argentinean, Chilean and Venezuelan sites, respectively (P < 0.001 for difference among the three sites). Rotavirus detection rates among a total of 5,801/1,256 medical visit/hospitalization diarrhea stool samples tested were 39%/71% in Argentina, 34%/47% in Chile and 29%/38% in Venezuela (P < 0.01 by chi square for difference among the three sites). Rotavirus was associated with a mean of 1.5, 1.8 and 3% of total medical visits and 1.6, 2.8 and 5% of hospitalizations among children <36 months of age at the Argentinean, Chilean and Venezuelan sites, respectively. Seasonality was evident for medical visits at all three sites (although less striking in Chile) with peak activity occurring between November and May. Rotavirus-associated hospitalizations had a marked peak in Venezuela, represented largely by short stays, but not in Argentina and Chile. CONCLUSIONS Rotavirus was a significant cause of medical visits at all three sentinel sites. Rotavirus caused less hospitalizations than previously reported in Argentina and Chile. On the basis of our findings we estimate that approximately 106,000/ 21,000, 48,000/8,000 and 98,000/31,000 rotavirus-associated medical visits/hospitalizations occur yearly in Argentina, Chile and Venezuela, respectively.
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Affiliation(s)
- M O'Ryan
- Instituto de Ciencias Biomédicas, Faculty of Medicine, University of Chile, Santiago
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Mueller CG, Rissoan MC, Salinas B, Ait-Yahia S, Ravel O, Bridon JM, Briere F, Lebecque S, Liu YJ. Polymerase chain reaction selects a novel disintegrin proteinase from CD40-activated germinal center dendritic cells. J Exp Med 1997; 186:655-63. [PMID: 9271581 PMCID: PMC2199019 DOI: 10.1084/jem.186.5.655] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
To identify genes expressed by a specific subset of dendritic cells found in vivo a polymerase chain reaction-based cDNA subtraction technique was applied to the recently described germinal center dendritic cells. A novel member of the disintegrin metalloproteinase family was cloned which comprises a not typical zinc-chelating catalytic site most similar to a bacterial metalloproteinase. Dendritic cell precursors or immature dendritic cells express no or low levels of the message. It is induced to high levels upon spontaneous or CD40-dependent maturation and in a mixed lymphocyte reaction. In situ hybridization showed distinct expression of this gene in the germinal center. This, together with the findings that certain disintegrin metalloproteinases regulate the activity of tumor necrosis factor alpha and that metalloproteinases have also been implicated in FasL processing, suggest that this novel molecule may play an important role in dendritic cell function and their interactions with germinal center T cells.
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Affiliation(s)
- C G Mueller
- Schering-Plough Laboratory for Immunological Research, 69571 Dardilly, France
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Gómez E, Atalah E, Salinas B. [Social cost effectiveness of 2 systems of treatment of malnourished children, in Chile]. Arch Latinoam Nutr 1983; 33:770-84. [PMID: 6433832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Two approaches in the care of malnourished children were evaluated in order to ascertain both their medical and economical effectiveness. One was a group of 745 children under an ambulatory nutritional rehabilitation program that included health care, supplementary foods and nutrition education; a second group of 420 children attended Day Care Centers (8 hours a day and five days per week) where they received a balanced diet, psychomotor stimulation according to age, and health care. The evolution of nutritional status was followed up and plotted against the NCHS/WHO weight-for-height tables. The rate of recovery was unsatisfactory; below 50% in mild cases of malnutrition, and even less in the more severe cases. The average length of time for attaining normality was longer for moderate malnutrition and for the ambulatory program. When the calculation included a correction for the probability of recovery for each system, the advantage of the Day Care Centers became even more evident: the mean length of time for recovery was 33.2% less than the ambulatory program. The social cost per child, per day, was substantially lower in the ambulatory program. The integral calculus of social cost per child, per day, and the corrected mean time for recovery provided the social cost-effectiveness of nutritional recovery. This figure was clearly adventageous for the ambulatory program for all ages and degrees of malnutrition, exception made for moderately malnourished children below two years of age. In this case, the Day Care Centers appeared to be the most effective therapeutic alternative. This type of analysis is a contribution to the evaluation of medico-social programs for the recuperation of malnutrition. The advantage lies in the fact that it allows an optimization in the allocation of resources, when the previous step is the choice of best therapeutic alternative based upon the patient's age and nutritional status.
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Scocozza JB, Salinas B, De Hoet EP. [Lyophilized Sula, a possible substitute of Löwestein-Jensen medium in the Antituberculosis Campaign Laboratories]. Bol Oficina Sanit Panam 1969; 67:206-13. [PMID: 4247528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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