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Paradela M, González D, Parente I, Fernández R, De La Torre MM, Delgado M, García JA, Fieira E, Bonhome C, Maté JMB. Surgical risk factors associated with lung transplantation. Transplant Proc 2010; 41:2218-20. [PMID: 19715878 DOI: 10.1016/j.transproceed.2009.06.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Despite years of experience with lung transplantation, perioperative morbidity rates remain high. The objective of this study was to analyze our series of lung transplant recipients, seeking to identify possible intra- and postoperative risk factors associated with mortality. PATIENTS AND METHODS We performed a descriptive, retrospective study of 224 consecutive patients undergoing lung transplantation over a period of 112 months; we excluded retransplant procedures. We gathered details of the surgical procedure and postoperative period in the recovery unit. Univariate analysis using the chi-square test identified variables associated with the incidence of mortality. RESULTS From 1999 to 2008, we performed 224 lung transplants, including 66% in men and 34% in women. Their overall mean age was 49.9 +/- 13.5 years. The conditions that led to transplantation were pulmonary fibrosis (38.4%); chronic obstructive pulmonary disease emphysema (29%); cystic fibrosis (10.7%); bronchiectasis (8.9%); pulmonary hypertension (3.1%); and other diseases (9.9%). A total of 124 (55.4%) patients underwent single and 100 (44.6%) received sequential bilateral lung transplantations. Surgical risk factors were identified in 51.3% of the cases, the most frequent being hemorrhage (25.3%), followed by severe pulmonary hypertension (14.7%) and cardiopulmonary bypass (12.1%). Greater perioperative mortality was detected among patients with surgical risk factors, namely, significantly related to cardiopulmonary bypass, pulmonary hypertension, and air leak. A higher frequency of surgical risk factors was observed among patients with bilateral lung transplantations and longer procedures, but they were not associated with greater perioperative mortality. Reoperation was necessary in 16 patients (7.2%), mainly owing to bleeding, it was not significantly related to mortality risk. CONCLUSIONS The incidence of surgical risk factors in lung transplantation was high, especially in bilateral lung transplantations and prolonged procedures. Postoperative bleeding requiring reoperation was not frequent and not associated with increased preoperative mortality in our series.
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Delgado M, Borro JM, De La Torre MM, Fernández R, González D, Paradela M, García JA, Fieira E, Rama P. Lung transplantation as the first choice in emphysema. Transplant Proc 2010; 41:2207-9. [PMID: 19715874 DOI: 10.1016/j.transproceed.2009.05.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
INTRODUCTION The indication for single or double lung transplantation in patients diagnosed with pulmonary emphysema is a topic of current debate. Our aim was to analyze the differences in the incidence of perioperative complications, survival, and quality of life between single and double lung transplantations. MATERIALS AND METHODS From 1999 to 2008, 223 subjects underwent transplantation in our department, of whom 62 (28%) had a previous diagnosis of pulmonary emphysema. A retrospective study was performed to establish possible differences between group 1 (single lung) and group 2 (double lung) transplants analyzing overall survival using the Kaplan-Meier method and differences between groups using the log-rank test. Pearson chi-square test was used to compare the frequency of postoperative complications, bronchiolitis obliterans BOS acute rejection episodes, and infections. RESULTS We included 62 patients who underwent transplantation for emphysema. Cumulative 5-year survival rate, excluding preoperative mortality, was 54% overall, 59% for group 1, and 56% for group 2. No significant differences were observed between the groups (P = .47). The frequency of BOS was 34% in group 1 and 42% in group 2 (P = .52). At least 1 acute rejection episode occurred in 52% of group 1 patients and 51% of group 2 patients (P = .98). Bacterial infections were experienced by 50% of group 1 patients and 54% of group 2 patients (P = .72). Fungal infections affected 10% of group 1 patients and 15% of group 2 patients (P = .71). Intraoperative complications were recorded in 27.6% of group 1 patients versus 54% of group 2 patients, a difference that was statistically significant (P = .032). CONCLUSIONS The study results supported the decision of our group to consider single lung transplantation the treatment of choice in emphysema, which may be complemented with volume reduction surgery in the native lung or subsequent transplantation of the contralateral lung.
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de la Torre MM, Borro JM, Fernández R, González D, Delgado M, Paradela M, García JA, Lemos C. Results of "twinning procedure" in lung transplantation: experience in a single center. Transplant Proc 2010; 41:2213-5. [PMID: 19715876 DOI: 10.1016/j.transproceed.2009.05.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
INTRODUCTION The major limiting factor for lung transplantation (LT), both worldwide and in Spain, is the number of suitable lung donors. This, together with the increased demand for LT, led us to propose the performance of 2 single lung transplantations simultaneously using the same donor (the "twinning procedure"). OBJECTIVE The objective of this study was to analyze the outcome of patients who underwent transplantation with this procedure, assessing differences between the first and the second transplant. PATIENTS AND METHODS From November 2001 to August 2008, 46 single lung transplantations (SLTs) were performed with 23 donors. RESULTS The mean ischemia time was 258 minutes (median, 265) for the first transplantation and 312 minutes (median, 320) for the second transplantation. Primary graft dysfunction occurred in 5 patients (24%) in the first group and 9 in the second group (39%; P = .27). The median intubation time was 8 hours for the first and 6.5 hours for the second group. The mean hospital stay was 39 and 31 days, respectively. Postoperative mortality was 2 (8.7%) and 3 (13%) patient, respectively (P = .99). There was no significant difference in the incidence of acute rejection episodes, infections, or chronic rejections. Five-year survival rates were 67.9% for the first and 61.5% for the second (Kaplan-Meier). CONCLUSIONS The performance of 2 SLTs using the same donor and in the same hospital was feasible with adequate planning, permitting better use of donors and reducing waiting list time and mortality. Our results showed no increased risk for recipients of the second transplant in the early postoperative and long-term periods.
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Gutiérrez NC, Sarasquete ME, Misiewicz-Krzeminska I, Delgado M, De Las Rivas J, Ticona FV, Fermiñán E, Martín-Jiménez P, Chillón C, Risueño A, Hernández JM, García-Sanz R, González M, San Miguel JF. Deregulation of microRNA expression in the different genetic subtypes of multiple myeloma and correlation with gene expression profiling. Leukemia 2010; 24:629-37. [PMID: 20054351 DOI: 10.1038/leu.2009.274] [Citation(s) in RCA: 170] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Specific microRNA (miRNA) signatures have been associated with different cytogenetic subtypes in acute leukemias. This finding prompted us to investigate potential associations between genetic abnormalities in multiple myeloma (MM) and singular miRNA expression profiles. Moreover, global gene expression profiling was also analyzed to find correlated miRNA gene expression and select miRNA target genes that show such correlation. For this purpose, we analyzed the expression level of 365 miRNAs and the gene expression profiling in 60 newly diagnosed MM patients, selected to represent the most relevant recurrent genetic abnormalities. Supervised analysis showed significantly deregulated miRNAs in the different cytogenetic subtypes as compared with normal PC. It is interesting to note that miR-1 and miR-133a clustered on the same chromosomal loci, were specifically overexpressed in the cases with t(14;16). The analysis of the relationship between miRNA expression and their respective target genes showed a conserved inverse correlation between several miRNAs deregulated in MM cells and CCND2 expression level. These results illustrate, for the first time, that miRNA expression pattern in MM is associated with genetic abnormalities, and that the correlation of the expression profile of miRNA and their putative mRNA targets is useful to find statistically significant protein-coding genes in MM pathogenesis associated with changes in specific miRNAs.
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Delgado M, Frescatada M, Ribeiro-Varandas E, Viegas W, Jones R. Dynamics of Functional Heterochromatic Domains in the Plant Interphase Nucleus. Cytogenet Genome Res 2010; 129:64-71. [DOI: 10.1159/000311607] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Retamal J, Libuy J, Jimenez M, Delgado M, Besa C, Bugedo G, Bruhn A. Decreasing tidal volume from 6 to 4 ml/kg: feasibility and effects on repeated opening and closing. Crit Care 2010. [PMCID: PMC2934053 DOI: 10.1186/cc8420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Charlier JC, Arnaud L, Avilov IV, Delgado M, Demoisson F, Espinosa EH, Ewels CP, Felten A, Guillot J, Ionescu R, Leghrib R, Llobet E, Mansour A, Migeon HN, Pireaux JJ, Reniers F, Suarez-Martinez I, Watson GE, Zanolli Z. Carbon nanotubes randomly decorated with gold clusters: from nano2hybrid atomic structures to gas sensing prototypes. NANOTECHNOLOGY 2009; 20:375501. [PMID: 19706940 DOI: 10.1088/0957-4484/20/37/375501] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Carbon nanotube surfaces, activated and randomly decorated with metal nanoclusters, have been studied in uniquely combined theoretical and experimental approaches as prototypes for molecular recognition. The key concept is to shape metallic clusters that donate or accept a fractional charge upon adsorption of a target molecule, and modify the electron transport in the nanotube. The present work focuses on a simple system, carbon nanotubes with gold clusters. The nature of the gold-nanotube interaction is studied using first-principles techniques. The numerical simulations predict the binding and diffusion energies of gold atoms at the tube surface, including realistic atomic models for defects potentially present at the nanotube surface. The atomic structure of the gold nanoclusters and their effect on the intrinsic electronic quantum transport properties of the nanotube are also predicted. Experimentally, multi-wall CNTs are decorated with gold clusters using (1) vacuum evaporation, after activation with an RF oxygen plasma and (2) colloid solution injected into an RF atmospheric plasma; the hybrid systems are accurately characterized using XPS and TEM techniques. The response of gas sensors based on these nano(2)hybrids is quantified for the detection of toxic species like NO(2), CO, C(2)H(5)OH and C(2)H(4).
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Jurado J, Ortega J, Iglesias P, Pacios E, Delgado M, Zarcos I, Rios B, Pérez M, Del Moral R, García-Puche J. 5162 Prognostic significance of breast cancer subtypes and nodal status. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)71054-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Martín-Bautista MJ, Sánchez D, Vila MA, Delgado M. A new fusion strategy for web metasearch. Soft comput 2009. [DOI: 10.1007/s00500-009-0467-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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González D, Paradela M, Parente I, De la Torre M, Fernández R, Delgado M, García J, Fieira E, Pato O, Borro J. Reoperation in the Postoperative Period of Lung Transplantation. Transplant Proc 2009; 41:2221-2. [DOI: 10.1016/j.transproceed.2009.06.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Gonzalez-Rey E, Anderson P, González MA, Rico L, Büscher D, Delgado M. Human adult stem cells derived from adipose tissue protect against experimental colitis and sepsis. Gut 2009; 58:929-39. [PMID: 19136511 DOI: 10.1136/gut.2008.168534] [Citation(s) in RCA: 482] [Impact Index Per Article: 32.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS Inflammatory bowel diseases (IBDs) are associated with uncontrolled innate and adaptive immunity against normal constituents, including commensal bacteria and microbial products. Mesenchymal stem cells (MSCs) suppress effector T cell responses and have beneficial effects in various immune disorders. This work investigates the therapeutic effects of human adipose-derived MSCs (hASCs) in various models of IBD and sepsis. METHODS Acute and chronic colitis was induced in mice with dextran sulfate sodium. Sepsis was induced by caecal ligation and puncture or by endotoxin injection. Colitic and septic mice were treated intraperitoneally with hASCs or murine ASCs, and diverse disease clinical signs and mortality were determined. The levels of various inflammatory cytokines and chemokines, T helper 1(Th1)-type response and generation of regulatory T cells (Treg) were determined in affected organs. RESULTS Systemic infusion of ASCs significantly ameliorated the clinical and histopathological severity of colitis, abrogating weight loss, diarrhoea and inflammation, and increasing survival. The therapeutic effect was associated with downregulation of the Th1-driven inflammatory responses. ASCs decreased a wide panel of inflammatory cytokines and chemokines and increased interleukin 10 (IL10), acting on macrophages. hASCs also impaired Th1 cell activation in both colonic mucosa and draining lymph nodes. The induction of IL10-secreting Treg was partially involved in the therapeutic effect of hASCs. Moreover, ASCs protected from severe sepsis by reducing the infiltration of inflammatory cells in various target organs and by downregulating the production of various inflammatory mediators. CONCLUSIONS hASCs emerge as key regulators of immune/inflammatory responses in vivo and as attractive candidates for cell-based treatments for IBD and sepsis.
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Vignot S, Delgado M, Levy-Soussan M, Taillade L, Rocher M, Lopez S, Lassauniere J, Spano J, Khayat D. Evaluation of supportive care needs: Comparison between patients and physicians’ perception. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e20649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e20649 Background: In order to optimize supportive care for cancer patients, we proposed them to fill a short questionnaire evaluating their potential complaints and we evaluated the concordance of their answers with the perception of their referent physician. Methods: Patients seen in consultation in an oncology unit were proposed to answer anonymously to 7 questions designed to identify potential social, psychological, nutritional problems or uncontrolled pain. Their physician answered to a similar questionnaire. Physicians were blinded to patients’ answers. Results: 155 patients accepted to complete the questionnaire. Median age was 60 yrs [21–85], 45% of patients were in metastatic setting. 70% of patients reported at least one problem, especially in the field of potential social problems (35%) or sleep disorders (25%). Concordance between patients and physicians was high for psychological support need (81%) or nutritional problems (87%) but was lower for social problems (62%) or uncontrolled pain (69%). Physicians tended to underestimate patients’ problems and missed social issues for 30% of patients or sleep disorders for 18% of patients. On the contrary and surprisingly, physicians overestimate patients’ complaints about uncontrolled pain (underestimation in 9% of cases but overestimation in 20% of cases for the item). Conclusions: Discordance between physicians and patients’ perception of supportive care needs emphasizes the importance of extending the use of screening tolls in daily practice. No significant financial relationships to disclose.
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Machover D, Gastiaburu J, Delgado M, Goldschmidt E, Hulhoven R, Benavides M, Lotz JP, Misset JL, de Vassal F, Tapiero H. Phase I-II study of aclarubicin for treatment of acute myeloid leukaemia. Eur J Haematol Suppl 2009; 47:33-42. [PMID: 3471523 DOI: 10.1111/j.1600-0609.1987.tb00020.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Saueressig M, de la Torre M, Fernandez R, Gonzalez D, Salcedo J, Delgado M, Paradela M, Macedo Neto A, Borro J. 703: Impact of Primary Graft Dysfunction Grade 3 on Survival of Lung Transplanted Patients. J Heart Lung Transplant 2009. [DOI: 10.1016/j.healun.2008.11.710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Delgado M, Fernández R, Paradela M, De La Torre M, González D, García J, Borro J. Development of Neoplasms During Lung Transplantation Follow-up. Transplant Proc 2008; 40:3094-6. [DOI: 10.1016/j.transproceed.2008.08.090] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Caperta AD, Rosa M, Delgado M, Karimi R, Demidov D, Viegas W, Houben A. Distribution patterns of phosphorylated Thr 3 and Thr 32 of histone H3 in plant mitosis and meiosis. Cytogenet Genome Res 2008; 122:73-9. [PMID: 18931489 DOI: 10.1159/000151319] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/23/2008] [Indexed: 11/19/2022] Open
Abstract
Cell cycle dependent phosphorylation of conserved N-terminal tail residues of histone H3 has been described in both animal and plant cells. Through cytogenetic approaches using different plant species we show a detailed description of distribution patterns of phosphorylated histone H3 at either threonine 3 or threonine 32 in mitosis and meiosis. In meristematic cells of the large genome species Secale cereale, Vicia faba and Hordeum vulgare we have found that phosphorylation of both threonine residues begins in prophase, and dephosphorylation occurs in late anaphase. However, in the small genome species Arabidopsis thaliana dephosphorylation occurs at anaphase. In the first division of meiosis of species with large genomes phosphorylation of histone H3 at either threonine 3 or threonine 32 is seen first in diakinesis and extends to anaphase I, whereas in the second division these post-translational modifications are visible at metaphase II through anaphase II. While in A. thaliana dephosphorylation takes place at anaphase I and II. In all species analysed phosphorylated H3 at either threonine 3 or threonine 32 are distributed along the entire length of chromosomes during mitotic metaphase and metaphase I. In the second meiotic division threonine 3 phosphorylation is restricted to the pericentromeric domain, while phosphorylation of threonine 32 is widespread along chromosome arms of all species analysed.
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Delgado M, Pérez-Miguelsanz J, Garrido F, Rodríguez-Tarduchy G, Pérez-Sala D, Pajares MA. Early effects of copper accumulation on methionine metabolism. Cell Mol Life Sci 2008; 65:2080-90. [PMID: 18560753 PMCID: PMC11131693 DOI: 10.1007/s00018-008-8201-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Wilson's disease is characterized by longterm hepatic accumulation of copper leading to liver disease with reduction of S-adenosylmethionine synthesis. However, the initial changes in this pathway remain unknown and constitute the objective of the present study. Using the Long Evans Cinnamon rat model, early alterations were detected in the mRNA and protein levels, as well as in the activities of several enzymes of the methionine cycle. Notably, the main change was a redox-mediated 80% decrease in the mRNA levels of the methionine adenosyltransferase regulatory subunit as compared to the control group. Moreover, changes in S-adenosylmethionine, S-adenosylhomocysteine, methionine and glutathione levels were also observed. In addition, in vitro experiments show that copper affects the activity and folding of methionine adenosyltransferase catalytic subunits. Taken together, these observations indicate that early copper accumulation alters methionine metabolism with a pattern distinct from that described previously for other liver diseases.
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Delgado M. Vasoactive intestinal peptide and pituitary adenylate cyclase-activating polypeptide as modulators of innate and adaptive immunity. Exp Dermatol 2008. [DOI: 10.1111/j.0906-6705.2004.00212x.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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González Moles MA, Mosqueda-Taylor A, Esteban F, Gil-Montoya JA, Díaz-Franco MA, Delgado M, Muñoz M. Cell proliferation associated with actions of the substance P/NK-1 receptor complex in keratocystic odontogenic tumours. Oral Oncol 2008; 44:1127-33. [PMID: 18486533 DOI: 10.1016/j.oraloncology.2008.02.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2008] [Revised: 02/20/2008] [Accepted: 02/20/2008] [Indexed: 01/21/2023]
Abstract
The expression of substance P (SP) and its NK-1 receptor (NK-1R) in keratocystic odontogenic tumours (KOTs) was studied to determine whether the intrinsic growth potential of these lesions is related to a cell proliferation stimulus mediated by the SP/NK-1R complex. A total of 65 tissue samples of solitary non-recurrent KOTs, solitary recurrent KOTs, KOTs associated with nevoid basal cell carcinoma syndrome (NBCCS) and KOTs with chondroid wall were studied by immunohistochemistry, using anti-SP, anti-NK-1R and anti-Ki-67 monoclonal antibodies. Expression of these markers was analysed in infiltrating lymphocytes, in fibrous capsule, and in membrane, cytoplasm and nucleus of epithelial cells. SP expression in infiltrating lymphocytes was significantly associated with SP in fibrous capsule and epithelial cells. KOTs associated with NBCCS showed a significantly higher SP expression in all tissues and cell compartments compared with other KOT types. Finally, SP expression in epithelial cells was associated with positive Ki-67 expression in dysplastic epithelium. This first published report on SP and NK-1R expressions in KOTs demonstrates that actions of the SP/NK-1R complex may constitute a mechanism to stimulate epithelial cell proliferation in KOT. This pathway may be of special relevance in the multiple KOTs associated with NBCCS.
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González Macías J, Guañabens Gay N, Gómez Alonso C, del Río Barquero L, Muñoz Torres M, Delgado M, Pérez Edo L, Bernardino Díaz López J, Jódar Gimeno E, Hawkins Carranza F. Guías de práctica clínica en la osteoporosis posmenopáusica, glucocorticoidea y del varón. Sociedad Española de Investigación Ósea y del Metabolismo Mineral. Rev Clin Esp 2008. [DOI: 10.1016/s0014-2565(08)71780-6] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Collantes M, Peñuelas I, Álvarez-Erviti L, Blesa J, Martí-Climent J, Quincoces G, Delgado M, Ecay M, Martínez A, Arbizu J, Rodríguez-Oroz M, Obeso J, Richter J. Utilización de la 11C-(+)-α-dihidrotetrabenazina para la evaluación de la inervación dopaminérgica en modelos animales de la enfermedad de Parkinson. ACTA ACUST UNITED AC 2008. [DOI: 10.1157/13117191] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Collantes M, Peñuelas I, Alvarez-Erviti L, Blesa J, Martí-Climent JM, Quincoces G, Delgado M, Ecay M, Martínez A, Arbizu J, Rodríguez-Oroz MC, Obeso J, Richter JA. [Use of 11C-(+)-alpha -dihydrotetrabenazine for the assessment of dopaminergic innervation in animal models of Parkinson's disease]. REVISTA ESPANOLA DE MEDICINA NUCLEAR 2008; 27:103-111. [PMID: 18367048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
AIM This study evaluates the utility of (11)C-(+)-alpha -dihydrotetrabenazine ((11)C-(+)DTBZ) in the quantification of dopaminergic innervation by positron emission tomography (PET) in rat and monkey, two animal species used as animal models of Parkinson's disease. MATERIAL AND METHODS Healthy control animals (n = 10) and the effect of 6-hydroxidopamine (6-OHDA) neurotoxic were studied in rats. (18)F-DOPA PET studies and digital quantitative autoradiography were also carried out. Studies with Macaca fascicularis were performed in control and 1-methyl 4-phenyl 1, 2, 3, 6-tetrahydropyridine (MPTP) treated animals. RESULTS In both species high quality images were generated in which clear uptake of (11)C-(+)DTBZ was found in the striatum. (11)C-(+)DTBZ uptake quantification was estimated by creating parametric images and binding potential (BP) calculation. BP in control rats was 1.10 +/- 0.16 (mean +/- standard deviation [SD], whereas 6-OHDA produced a decrease in the uptake depending on the lesion degree. Images obtained with (18)F-DOPA were not adequate for the analysis as they did not discriminate the stratum whereas digital quantitative autoradiography studies confirmed the high affinity of striatum by (11)C-(+)DTBZ. In monkeys, final BP values were 1.31 and 1.06 and MPTP treatment reduced uptake by 40 %. CONCLUSIONS The quality of PET images and the decrease of uptake in 6-OHDA and MPTP lesions show that (11)C-(+)DTBZ is an adequate radiotracer for the study of dopaminergic innervation in these animal models.
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Salazar L, Aravena O, Abello P, Escobar A, Contreras-Levicoy J, Rojas-Colonelli N, Catalán D, Aguirre A, Zúñiga R, Pesce B, González C, Cepeda R, Cuchacovich M, Molina MC, Salazar-Onfray F, Delgado M, Toes RE, Aguillón JC. Modulation of established murine collagen-induced arthritis by a single inoculation of short-term lipopolysaccharide-stimulated dendritic cells. Ann Rheum Dis 2007; 67:1235-41. [PMID: 18056756 DOI: 10.1136/ard.2007.072199] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND The use of regulatory or immature dendritic cells (DCs) as tools for modulating experimental rheumatoid arthritis is very recent. Tumour necrosis factor (TNF)-stimulated DCs have been shown to restore tolerance in experimental autoimmune encephalomyelitis and collagen-induced arthritis (CIA). OBJECTIVE We investigated the capacity of short-term lipopolysaccharide (LPS)-stimulated DCs pulsed with type II collagen (CII) to induce tolerance against established CIA. METHODS Bone marrow-derived DCs were generated in the presence of granulocyte monocyte colony-stimulating factor (GM-CSF). After CIA induction, mice were injected at day 35 with a single dose of 4- or 24-h LPS-stimulated DCs that had been loaded with CII (4hLPS/CII/DCs or 24hLPS/CII/DCs). Arthritis progression was monitored by clinical and histological evaluations. RESULTS Flow cytometry of 4hLPS/CII/DCs showed intermediate CD40 and CD86 expression, lower than that of 24hLPS/CII/DCs (fully mature) and higher than that of CII/DCs (immature). A functional assay showed that 4hLPS/CII/DCs display increased endocytosis ability with respect to 24hLPS/CII/DCs, indicating a semimature state. The single inoculation of 4hLPS/CII/DCs in mice with established CIA reduced disease severity significantly over time. Histological evaluation of mice treated with 4hLPS/CII/DCs revealed diminished inflammatory synovitis, cartilage damage and fibrosis. Co-cultures of DCs with splenocytes from CIA mice showed that collagen-specific interferon (IFN)gamma production was dramatically inhibited by 4hLPS/CII/DCs. 4hLPS/CII/DCs were high IL10 producers, which could explain the inhibition of arthritis progression in mice receiving this treatment because neither antibodies nor regulatory CD4+CD25+Foxp3+ T lymphocytes were demonstrated to be involved. CONCLUSION Short-term LPS-modulated DCs inoculation interferes with CIA progression when loaded with CII.
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Alonso Melgar A, Delgado M, Nadal M, Aparicio P, Martínez M, Julve C, Navarro M. 25 Supervivencia a largo plazo del catéter tunelizado yugular en niños en hemodiálisis. An Pediatr (Barc) 2007. [DOI: 10.1016/s1695-4033(07)70743-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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