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Peinado FM, Olivas-Martínez A, Iribarne-Durán LM, Ubiña A, León J, Vela-Soria F, Fernández-Parra J, Fernández MF, Olea N, Freire C, Ocón-Hernández O, Artacho-Cordón F. Cell cycle, apoptosis, cell differentiation, and lipid metabolism gene expression in endometriotic tissue and exposure to parabens and benzophenones. Sci Total Environ 2023; 879:163014. [PMID: 37003176 DOI: 10.1016/j.scitotenv.2023.163014] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 03/15/2023] [Accepted: 03/19/2023] [Indexed: 05/17/2023]
Abstract
AIM To describe the expression profile in endometriotic tissue of genes involved in four signaling pathways related to the development and progression of endometriosis (cell cycle, apoptosis, cell differentiation and lipid metabolism) and to explore its relationship with the women exposure to chemicals with hormonal activity released from cosmetics and personal care products (PCPs). METHODS This cross-sectional study, encompassed within the EndEA study, comprised a subsample of 33 women with endometriosis. Expression levels of 13 genes (BMI1, CCNB1, CDK1, BAX, BCL2L1, FOXO3, SPP1, HOXA10, PDGFRA, SOX2, APOE, PLCG1 and PLCG2) in endometriotic tissue and urinary concentrations of 4 paraben (PB) and 3 benzophenone (BP) congeners were quantified. Bivariate linear and logistic regression analyses were performed to explore the associations between exposure and gene expression levels. RESULTS A total of 8 out 13 genes (61.5 %) were expressed in >75 % of the samples. Exposure to congeners of PBs and/or BPs was associated with the overexpression of CDK1 gene (whose protein drives cells through G2 phase and mitosis), HOXA10 and PDGFRA genes (whose proteins favor pluripotent cell differentiation to endometrial cells), and APOE (whose protein regulates the transport and metabolism of cholesterol, triglycerides and phospholipids in multiple tissues) and PLCG2 genes (whose protein creates 1D-myo-inositol 1,4,5-trisphosphate and diacylglycerol, two important second messengers). CONCLUSIONS Our findings suggest that women exposure to cosmetic and PCP-released chemicals might be associated with the promotion of cell cycle and cell differentiation as well as with lipid metabolism disruption in endometriotic tissue, three crucial signaling pathways in the development and progression of endometriosis. However, further studies should be accomplished to confirm these preliminary data.
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Affiliation(s)
- F M Peinado
- Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), E-18012 Granada, Spain; University of Granada, Centre for Biomedical Research, E-18016 Granada, Spain; Radiology and Physical Medicine Department, University of Granada, E-18016 Granada, Spain.
| | - A Olivas-Martínez
- Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), E-18012 Granada, Spain; University of Granada, Centre for Biomedical Research, E-18016 Granada, Spain; Radiology and Physical Medicine Department, University of Granada, E-18016 Granada, Spain
| | - L M Iribarne-Durán
- Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), E-18012 Granada, Spain
| | - A Ubiña
- General surgery, San Cecilio University Hospital, E-18016 Granada, Spain
| | - J León
- Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), E-18012 Granada, Spain; Digestive Medicine Unit, 'San Cecilio' University Hospital, E-18012 Granada, Spain; CIBER Hepatic and Digestive Diseases (CIBEREHD), E-28029 Madrid, Spain
| | - F Vela-Soria
- Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), E-18012 Granada, Spain
| | - J Fernández-Parra
- Gynaecology and Obstetrics Unit, 'Virgen de las Nieves' University Hospital, E-18014 Granada, Spain
| | - M F Fernández
- Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), E-18012 Granada, Spain; CIBER Epidemiology and Public Health (CIBERESP), E-28029 Madrid, Spain; Radiology and Physical Medicine Department, University of Granada, E-18016 Granada, Spain
| | - N Olea
- Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), E-18012 Granada, Spain; CIBER Epidemiology and Public Health (CIBERESP), E-28029 Madrid, Spain; Radiology and Physical Medicine Department, University of Granada, E-18016 Granada, Spain; Nuclear Medicine Unit, 'San Cecilio' University Hospital, E-18016 Granada, Spain
| | - C Freire
- Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), E-18012 Granada, Spain; CIBER Epidemiology and Public Health (CIBERESP), E-28029 Madrid, Spain
| | - O Ocón-Hernández
- Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), E-18012 Granada, Spain; Gynaecology and Obstetrics Unit, 'San Cecilio' University Hospital, E-18016 Granada, Spain
| | - F Artacho-Cordón
- Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), E-18012 Granada, Spain; CIBER Epidemiology and Public Health (CIBERESP), E-28029 Madrid, Spain; Radiology and Physical Medicine Department, University of Granada, E-18016 Granada, Spain.
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Flint-Brodsly N, Zeevi E, Dor-On E, Schneiderman R, Munster M, Porat Y, Voloshin T, Davidi S, León J, Haber A, Giladi M, Weinberg U, Palti Y. P-121 Effects of tumor treating fields (TTFields) on gastric cancer cells and their potential concomitant application with FOLFOX. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.211] [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] Open
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Guerrero-Ramos F, Plata-Bello A, González-Díaz A, García C, González-Valcárcel I, De La Morena-Gallego J, Díaz-Goizueta F, Fernández-Álamo J, Gonzalo V, Montero J, Sousa-Escandón A, León J, Pontones J, Delgado F, Adriazola M, Pascual Á, Calleja J, Ruano A, Martínez-Piñeiro L, Angulo-Cuesta J. Long-term prospective results of the Spanish multicentre experience using recirculant hyperthermic MMC with Combat BRS HIVEC system. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00246-9] [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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Fuentes S, Espinoza D, León J. Synthesis, Characterization and Optical Properties of ZnO Nanoparticles Doped with Er and Yb. J Nanosci Nanotechnol 2021; 21:5714-5722. [PMID: 33980385 DOI: 10.1166/jnn.2021.19489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This paper discusses the structure, particle morphology, and optical properties of un-doped ZnO and ZnO doped with Er3+ and Yb3+ lanthanide ion nanoparticles (NPs) through a process denominated sol-gel-hydrothermal. According to the pattern of X-ray diffraction, ZnO:Er and ZnO:Yb is formed by a single-phase wurtzite structure with crystallites sized ~65 nm on average, and Er or Yb dopant ions in the hexagonal structure of ZnO, specifically in its distorted lattice sites. The results also suggest the possible role of oxygen vacancies or Ox- (defects) in the energy transfer from ZnO to the Er or Yb ions with a decrease of 3.18 eV and 3.19 eV in bandgap values to a red shift.
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Affiliation(s)
- S Fuentes
- Departamento de Ciencias Farmacéuticas, Facultad de Ciencias, Universidad Católica del Norte, Casilla 1280, Antofagasta, Chile
| | - D Espinoza
- Departamento de Química, Facultad de Ciencias, Universidad Católica del Norte, Casilla 1280, Antofagasta, Chile
| | - J León
- Departamento de Química, Facultad de Ciencias, Universidad de Antofagasta, Antofagasta, 1240000, Chile
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Plata A, Guerrero-Ramos F, Garcia C, González-Díaz A, Gonzalez-Valcárcel I, de la Morena JM, Díaz-Goizueta FJ, del Álamo JF, Gonzalo V, Montero J, Sousa-Escandón A, León J, Pontones JL, Delgado F, Adriazola M, Pascual Á, Calleja J, Ruano A, Martínez-Piñeiro L, Angulo JC. Long-Term Experience with Hyperthermic Chemotherapy (HIVEC) Using Mitomycin-C in Patients with Non-Muscle Invasive Bladder Cancer in Spain. J Clin Med 2021; 10:jcm10215105. [PMID: 34768625 PMCID: PMC8584886 DOI: 10.3390/jcm10215105] [Citation(s) in RCA: 5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 10/27/2021] [Accepted: 10/29/2021] [Indexed: 12/23/2022] Open
Abstract
(1) Background: Intravesical mitomycin-C (MMC) combined with hyperthermia is increasingly used in non-muscle invasive bladder cancer (NMIBC), especially in the context of a relative BCG shortage. We aim to determine real-world data on the long-term treatment outcomes of adjunct hyperthermic intravesical chemotherapy (HIVEC) with MMC and a COMBAT® bladder recirculation system (BRS); (2) Methods: A prospective observational trial was performed on patients with NMIBC treated with HIVEC using BRS in nine academic institutions in Spain between 2012–2020 (HIVEC-E). Treatment effectiveness (recurrence, progression and overall mortality) was evaluated in patients treated with HIVEC MMC 40mg in the adjuvant setting, with baseline data and a clinical follow-up, that comprise the Full Analysis Set (FAS). Safety, according to the number and severity of adverse effects (AEs), was evaluated in the safety (SAF) population, composed by patients with at least one adjunct HIVEC MMC instillation; (3) Results: The FAS population (n = 502) received a median number of 8.78 ± 3.28 (range 1–20) HIVEC MMC instillations. The median follow-up duration was 24.5 ± 16.5 (range 1–81) months. Its distribution, based on EAU risk stratification, was 297 (59.2%) for intermediate and 205 (40.8%) for high-risk. The figures for five-year recurrence-free and progression-free survival were 50.37% (53.3% for intermediate and 47.14% for high-risk) and 89.83% (94.02% for intermediate and 84.23% for high-risk), respectively. A multivariate analysis identified recurrent tumors (HR 1.83), the duration of adjuvant HIVEC therapy <4 months (HR 1.72) and that high-risk group (HR 1.47) were at an increased risk of recurrence. Independent factors of progression were high-risk (HR 3.89), recurrent tumors (HR 3.32) and the induction of HIVEC therapy without maintenance (HR 2.37). The overall survival was determined by patient age at diagnosis (HR 3.36) and the treatment duration (HR 1.82). The SAF population (n = 592) revealed 406 (68.58%) patients without AEs and 186 (31.42%) with at least one AE: 170 (28.72%) of grade 1–2 and 16 (2.7%) of grade 3–4. The most frequent AEs were dysuria (10%), pain (7.1%), urgency (5.7%), skin rash (4.9%), spasms (3.7%) and hematuria (3.6%); (4) Conclusions: HIVEC using BRS is efficacious and well tolerated. A longer treatment duration, its use in naïve patients and the intermediate-risk disease are independent determinants of success. Furthermore, a monthly maintenance of adjunct MMC HIVEC diminishes the progression rate of NMIBC.
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Affiliation(s)
- Ana Plata
- Urology Department, Hospital Universitario de Canarias, Carretera Ofra s/n, 38320 San Cristóbal de La Laguna, Spain; (A.P.); (C.G.)
| | - Félix Guerrero-Ramos
- Urology Department, Hospital Universitario 12 de Octubre, Avenida de Córdoba s/n, 28041 Madrid, Spain; (F.G.-R.); (A.G.-D.)
| | - Carlos Garcia
- Urology Department, Hospital Universitario de Canarias, Carretera Ofra s/n, 38320 San Cristóbal de La Laguna, Spain; (A.P.); (C.G.)
| | - Alejandro González-Díaz
- Urology Department, Hospital Universitario 12 de Octubre, Avenida de Córdoba s/n, 28041 Madrid, Spain; (F.G.-R.); (A.G.-D.)
| | - Ignacio Gonzalez-Valcárcel
- Urology Department, Hospital Universitario Infanta Sofía, Paseo de Europa 34, San Sebastián de los Reyes, 28702 Madrid, Spain; (I.G.-V.); (J.M.d.l.M.)
| | - José Manuel de la Morena
- Urology Department, Hospital Universitario Infanta Sofía, Paseo de Europa 34, San Sebastián de los Reyes, 28702 Madrid, Spain; (I.G.-V.); (J.M.d.l.M.)
| | | | - Julio Fernández del Álamo
- Urology Department, Hospital Universitario de Torrejón, Mateo Inurria, s/n, Torrejón de Ardoz, 28850 Madrid, Spain;
| | - Victoria Gonzalo
- Urology Department, Hospital Universitario de Burgos, Avenida Islas Baleares 3, 09006 Burgos, Spain; (V.G.); (J.M.)
| | - Javier Montero
- Urology Department, Hospital Universitario de Burgos, Avenida Islas Baleares 3, 09006 Burgos, Spain; (V.G.); (J.M.)
| | - Alejandro Sousa-Escandón
- Urology Department, Hospital Comarcal de Monforte, Rúa Corredoira s/n, 27400 Monforte de Lemos, Spain; (A.S.-E.); (J.L.)
| | - Juan León
- Urology Department, Hospital Comarcal de Monforte, Rúa Corredoira s/n, 27400 Monforte de Lemos, Spain; (A.S.-E.); (J.L.)
| | - Jose Luis Pontones
- Urology Department, Hospital Universitario La Fe, Avinguda de Fernando Abril Martorell 106, 46026 Valencia, Spain; (J.L.P.); (F.D.)
| | - Francisco Delgado
- Urology Department, Hospital Universitario La Fe, Avinguda de Fernando Abril Martorell 106, 46026 Valencia, Spain; (J.L.P.); (F.D.)
| | - Miguel Adriazola
- Urology Department, Hospital General Rio Carrión, Avenida Donantes de Sangre s/n, 34005 Palencia, Spain; (M.A.); (Á.P.)
| | - Ángela Pascual
- Urology Department, Hospital General Rio Carrión, Avenida Donantes de Sangre s/n, 34005 Palencia, Spain; (M.A.); (Á.P.)
| | - Jesús Calleja
- Urology Department, Hospital Clínico Universitario de Valladolid, Av. Ramón y Cajal 3, 47003 Valladolid, Spain; (J.C.); (A.R.)
| | - Ana Ruano
- Urology Department, Hospital Clínico Universitario de Valladolid, Av. Ramón y Cajal 3, 47003 Valladolid, Spain; (J.C.); (A.R.)
| | - Luis Martínez-Piñeiro
- Urology Department, Hospital Universitario La Paz, Paseo de la Castellana 261, 28046 Madrid, Spain;
| | - Javier C. Angulo
- Urology Department, Hospital Universitario Getafe, Carretera de Toledo, Km 12.500, Getafe, 28905 Madrid, Spain;
- Clinical Department, Facultad de Ciencias Biomédicas, Universidad Europea de Madrid, Carretera de Toledo, Km 12.500, Getafe, 28905 Madrid, Spain
- Correspondence: ; Tel.: +34-699497569
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Peinado FM, Ocón-Hernández O, Iribarne-Durán LM, Vela-Soria F, Ubiña A, Padilla C, Mora JC, Cardona J, León J, Fernández MF, Olea N, Artacho-Cordón F. Cosmetic and personal care product use, urinary levels of parabens and benzophenones, and risk of endometriosis: results from the EndEA study. Environ Res 2021; 196:110342. [PMID: 33069703 DOI: 10.1016/j.envres.2020.110342] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [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: 07/02/2020] [Revised: 09/28/2020] [Accepted: 10/07/2020] [Indexed: 06/11/2023]
Abstract
AIM To explore the relationship of urinary concentrations of different congeners of benzophenones and parabens with the utilization of cosmetics and personal care products (PCPs) and their impact on the risk of endometriosis, and to evaluate the influence of oxidative stress on associations found. METHODS This case-control study comprised a subsample of 124 women (35 cases; 89 controls). Endometriosis was confirmed (cases) or ruled out (controls) by laparoscopy, with visual inspection of the pelvis and biopsy of suspected lesions (histological diagnosis). Urinary concentrations of benzophenone-1 (BP-1), benzophenone-3 (BP-3), 4-hydroxibenzophenone (4-OH-BP), methyl- (MeP), ethyl- (EtP), propyl- (PrP), and butyl-paraben (BuP), and biomarkers of oxidative stress [lipid peroxidation (TBARS) and total antioxidant power (TAP)] were quantified. Information was gathered on the frequency of use of cosmetics and PCPs. Associations between the frequency of cosmetics/PCP use, urinary concentrations of benzophenones and parabens, oxidative stress, and endometriosis risk were explored in logistic and linear multivariable regression analyses. RESULTS The frequency of utilization of certain cosmetics and PCPs was significantly associated with urinary concentrations of benzophenones and parabens. After adjustment for potential confounders, the risk of endometriosis was increased in women in the second versus first terciles of MeP (OR = 5.63; p-value<0.001), BP-1 (OR = 5.12; p-value = 0.011), BP-3 (OR = 4.98; p-value = 0.008), and ƩBPs (OR = 3.34; p-value = 0.032). A close-to-significant relationship was observed between TBARS concentrations and increased endometriosis risk (OR = 1.60, p-value = 0.070) and an inverse association between TAP concentrations and this risk (OR = 0.15; p-value = 0.048). Oxidative stress results did not modify associations observed between benzophenone/paraben exposure and endometriosis risk. CONCLUSIONS Our findings indicate that the frequency of cosmetics and PCP utilization is a strong predictor of exposure to certain benzophenone and paraben congeners. These compounds may increase the risk of endometriosis in an oxidative stress-independent manner. Further studies are warranted to corroborate these findings.
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Affiliation(s)
- F M Peinado
- Biohealth Research Institute in Granada (ibs.GRANADA), E-18012, Granada, Spain
| | - O Ocón-Hernández
- Biohealth Research Institute in Granada (ibs.GRANADA), E-18012, Granada, Spain; Gynecology and Obstetrics Unit, 'San Cecilio' University Hospital, E-18016, Granada, Spain
| | - L M Iribarne-Durán
- Biohealth Research Institute in Granada (ibs.GRANADA), E-18012, Granada, Spain
| | - F Vela-Soria
- Biohealth Research Institute in Granada (ibs.GRANADA), E-18012, Granada, Spain
| | - A Ubiña
- General Surgery Unit, 'San Cecilio' University Hospital, E-18016, Granada, Spain
| | - C Padilla
- Biohealth Research Institute in Granada (ibs.GRANADA), E-18012, Granada, Spain; Gynecology and Obstetrics Unit, 'San Cecilio' University Hospital, E-18016, Granada, Spain
| | - J C Mora
- Gynecology and Obstetrics Unit, 'Virgen de las Nieves' University Hospital, E-18014, Granada, Spain
| | - J Cardona
- Biohealth Research Institute in Granada (ibs.GRANADA), E-18012, Granada, Spain; Gynecology and Obstetrics Unit, 'San Cecilio' University Hospital, E-18016, Granada, Spain
| | - J León
- Biohealth Research Institute in Granada (ibs.GRANADA), E-18012, Granada, Spain; Digestive Medicine Unit, 'San Cecilio' University Hospital, E-18012, Granada, Spain; CIBER Hepatic and Digestive Diseases (CIBEREHD), E-28029, Madrid, Spain
| | - M F Fernández
- Biohealth Research Institute in Granada (ibs.GRANADA), E-18012, Granada, Spain; CIBER Epidemiology and Public Health (CIBERESP), E-28029, Madrid, Spain; Radiology and Physical Medicine Department, University of Granada, E-18016, Granada, Spain
| | - N Olea
- Biohealth Research Institute in Granada (ibs.GRANADA), E-18012, Granada, Spain; CIBER Epidemiology and Public Health (CIBERESP), E-28029, Madrid, Spain; Radiology and Physical Medicine Department, University of Granada, E-18016, Granada, Spain; Nuclear Medicine Unit, 'San Cecilio' University Hospital, E-18016, Granada, Spain
| | - F Artacho-Cordón
- Biohealth Research Institute in Granada (ibs.GRANADA), E-18012, Granada, Spain; CIBER Epidemiology and Public Health (CIBERESP), E-28029, Madrid, Spain; Radiology and Physical Medicine Department, University of Granada, E-18016, Granada, Spain.
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Arebola JP, Martin-Olmedo P, Pérez-Carrascosa FM, León J, Echeverría R, Salcedo-Bellido I, Gomez-Peña C. Integrated approaches for the assessment of health impacts of environmental chemicals: our experience in the GraMo cohort study. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa165.149] [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: 11/12/2022] Open
Abstract
Abstract
The assessment of the health implications of human exposure to low doses of multiple environmental chemical pollutants represents an important challenge for environmental epidemiology. Current studies must go beyond simple exposure-disease associations and need further characterization of a complete exposure disease continuum, including exposure routes, adverse outcome pathways, potential subclinical effects, interactions between chemicals, and intra-individual susceptibility. This needs an effective synergism with basic sciences, which can enrich epidemiologic findings with very detailed information at a molecular level, but also with clinicians, who would help to provide accurate diagnoses and interpretation in a real-world scenario.
On the other hand, environmental exposures can affect the general population at different levels, including economic and social dimensions, which have been frequently overlooked. These approaches would require specific methodologies that are relatively novel in the field of environmental epidemiology, such as cost-benefit analyses and qualitative techniques.
Public health campaigns can clearly benefit from these mixed approaches.
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Affiliation(s)
- J P Arebola
- Instituto de Investigación Biosanitaria de Granada, Granada, Spain
- University of Granada, Granada, Spain
| | - P Martin-Olmedo
- Instituto de Investigación Biosanitaria de Granada, Granada, Spain
- Escuela Andaluza de Salud Pública, Granada, Spain
| | - F M Pérez-Carrascosa
- Instituto de Investigación Biosanitaria de Granada, Granada, Spain
- University of Granada, Granada, Spain
| | - J León
- Instituto de Investigación Biosanitaria de Granada, Granada, Spain
| | | | - I Salcedo-Bellido
- Instituto de Investigación Biosanitaria de Granada, Granada, Spain
- University of Granada, Granada, Spain
| | - C Gomez-Peña
- Instituto de Investigación Biosanitaria de Granada, Granada, Spain
- University of Granada, Granada, Spain
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Artacho-Cordón F, Ríos-Arrabal S, León J, Frederiksen H, Sáenz JM, Martín-Olmedo P, Fernández MF, Olea N, Arrebola JP. Adipose tissue concentrations of non-persistent environmental phenols and local redox balance in adults from Southern Spain. Environ Int 2019; 133:105118. [PMID: 31610369 DOI: 10.1016/j.envint.2019.105118] [Citation(s) in RCA: 18] [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: 06/14/2019] [Revised: 08/20/2019] [Accepted: 08/21/2019] [Indexed: 05/20/2023]
Abstract
The aim was to evaluate the associations of environmental phenol and paraben concentrations with the oxidative microenvironment in adipose tissue. This study was conducted in a subsample (n = 144) of the GraMo cohort (Southern Spain). Concentrations of 9 phenols and 7 parabens, and levels of oxidative stress biomarkers were quantified in adipose tissue. Associations were estimated using multivariable linear regression analyses adjusted for potential confounders. Benzophenone-3 (BP-3) concentration was borderline associated with enhanced glutathione peroxidase (GPx) activity [exp(β) = 1.20, p = 0.060] and decreased levels of reduced glutathione (GSH) [exp(β) = 0.55, p = 0.070]. Concentrations of bisphenol A (BPA) and methylparaben (MeP) were associated to lower glutathione reductase (GRd) activity [exp(β) = 0.83, exp(β) = 0.72, respectively], and BPA was borderline associated to increased levels of oxidized glutathione (GSSG) [exp(β) = 1.73, p-value = 0.062]. MeP was inversely associated to both hemeoxygenase-1 (HO-1) and superoxide dismustase (SOD) activity, as well as to the levels of thiobarbituric acid reactive substances (TBARS) [0.75 < exp(β) < 0.79]. Our results suggest that some specific non-persistent pollutants may be associated with a disruption of the activity of relevant antioxidant enzymes, in addition to the depletion of the glutathione stock. They might act as a tissue-specific source of free radicals, contributing to the oxidative microenvironment in the adipose tissue.
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Affiliation(s)
- F Artacho-Cordón
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain; University of Granada, Radiology and Physical Medicine Department, 18016 Granada, Spain; CIBER Epidemiology and Public Health (CIBERESP), 28029 Madrid, Spain
| | - S Ríos-Arrabal
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - J León
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain; Unidad de Gestión Clínica de Aparato Digestivo, Hospital Universitario San Cecilio de Granada, Spain; CIBER Hepatic and Digestive Diseases (CIBEREHD), 28029 Madrid, Spain.
| | - H Frederiksen
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Denmark; International Center for research and research training in Endocrine Disruption of Male Reproduction and Child health (EDMaRC), Rigshospitalet, University of Copenhagen, Denmark
| | - J M Sáenz
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - P Martín-Olmedo
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain; Escuela Andaluza de Salud Pública, Granada, Spain
| | - M F Fernández
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain; University of Granada, Radiology and Physical Medicine Department, 18016 Granada, Spain; CIBER Epidemiology and Public Health (CIBERESP), 28029 Madrid, Spain
| | - N Olea
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain; University of Granada, Radiology and Physical Medicine Department, 18016 Granada, Spain; CIBER Epidemiology and Public Health (CIBERESP), 28029 Madrid, Spain
| | - J P Arrebola
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain; CIBER Epidemiology and Public Health (CIBERESP), 28029 Madrid, Spain; University of Granada, Preventive Medicine and Public Health Department, 18016 Granada, Spain.
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Salinas-Asensio MM, Ríos-Arrabal S, Artacho-Cordón F, Olivares-Urbano MA, Calvente I, León J, Núñez MI. Exploring the radiosensitizing potential of magnetotherapy: a pilot study in breast cancer cells. Int J Radiat Biol 2019; 95:1337-1345. [PMID: 31140889 DOI: 10.1080/09553002.2019.1619951] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Aim: To explore the influence of electromagnetic fields (EMFs) on the cell cycle progression of MDA-MB-231 and MCF-7 breast cancer cell lines and to evaluate the radiosensitizing effect of magnetotherapy during therapeutic co-exposure to EMFs and radiotherapy. Material and methods: Cells were exposed to EMFs (25, 50 and 100 Hz; 8 and 10 mT). In the co-treatment, cells were first exposed to EMFs (50 Hz/10 mT) for 30 min and then to ionizing radiation (IR) (2 Gy) 4 h later. Cell cycle progression and free radical production were evaluated by flow cytometry, while radiosensitivity was explored by colony formation assay. Results: Generalized G1-phase arrest was found in both cell lines several hours after EMF exposure. Interestingly, a marked G1-phase delay was observed at 4 h after exposure to 50 Hz/10 mT EMFs. No cell cycle perturbation was observed after repeated exposure to EMFs. IR-derived ROS production was enhanced in EMF-exposed MCF-7 cells at 24 h post-exposure. EMF-exposed cells were more radiosensitive in comparison to sham-exposed cells. Conclusions: These results highlight the potential benefits of concomitant treatment with magnetotherapy before radiotherapy sessions to enhance the effectiveness of breast cancer therapy. Further studies are warranted to identify the subset(s) of patients who would benefit from this multimodal treatment.
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Affiliation(s)
| | - S Ríos-Arrabal
- Radiology and Physical Medicine Department, University of Granada , Granada , Spain.,Biosanitary Research Institute of Granada ibs.GRANADA , Granada , Spain
| | - F Artacho-Cordón
- Radiology and Physical Medicine Department, University of Granada , Granada , Spain.,Biosanitary Research Institute of Granada ibs.GRANADA , Granada , Spain
| | - M A Olivares-Urbano
- Radiology and Physical Medicine Department, University of Granada , Granada , Spain.,Biosanitary Research Institute of Granada ibs.GRANADA , Granada , Spain
| | - I Calvente
- Radiology and Physical Medicine Department, University of Granada , Granada , Spain.,Biosanitary Research Institute of Granada ibs.GRANADA , Granada , Spain
| | - J León
- Biosanitary Research Institute of Granada ibs.GRANADA , Granada , Spain.,Digestive Unit, San Cecilio University Hospital , Granada , Spain.,CIBER of Hepatic and Digestive Diseases (CIBEREHD) , Madrid , Spain
| | - M I Núñez
- Radiology and Physical Medicine Department, University of Granada , Granada , Spain.,Biosanitary Research Institute of Granada ibs.GRANADA , Granada , Spain.,CIBER of Epidemiology and Public Health (CIBERESP) , Madrid , Spain.,Biopathology and Regenerative Medicine Institute (IBIMER) , University of Granada, Granada , Spain
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10
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Corzo-Ariyama HA, García-Heredia A, Heredia N, García S, León J, Jaykus L, Solís-Soto L. Phylogroups, pathotypes, biofilm formation and antimicrobial resistance of Escherichia coli isolates in farms and packing facilities of tomato, jalapeño pepper and cantaloupe from Northern Mexico. Int J Food Microbiol 2019; 290:96-104. [DOI: 10.1016/j.ijfoodmicro.2018.10.006] [Citation(s) in RCA: 16] [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] [Received: 11/11/2017] [Revised: 08/15/2018] [Accepted: 10/05/2018] [Indexed: 01/05/2023]
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Benavides M, León J, Etesse M, Espezúa L, Stuart J. Exploring the association between segregation and physical intimate partner violence in Lima, Peru: The mediating role of gender norms and social capital. SSM Popul Health 2018; 7:100338. [PMID: 30623012 PMCID: PMC6308259 DOI: 10.1016/j.ssmph.2018.100338] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 09/03/2018] [Accepted: 12/06/2018] [Indexed: 11/24/2022] Open
Abstract
Intimate partner violence (IPV) has been globally recognized as a major public health problem. A growing body of evidence has identified a significant relationship between living in a neighborhood of concentrated disadvantage and experiencing IPV. Considering the increasing rates of poverty and segregation registered in Latin American cities, research on the effects of segregation on IPV seems to be particularly necessary in the region. Therefore, this study aims to analyze the impact of economic residential segregation on physical IPV, exploring the mediating roles of social capital and gender norms unfavorable to women. This study used an original dataset in which women from five districts of Metropolitan Lima were interviewed. The results show that residential segregation indirectly influences on physical IPV through the considered mechanisms. In this regard, it was found that segregation increases the likelihood of prevailing gender norms unfavorable to women, and this in turn increases the likelihood of IPV. At the same time, segregation fosters the development of greater social ties among the neighbors, which in turn diminish the levels of IPV. Regarding the overall effect of segregation through both mechanisms, on average social capital is a factor of more relevance. The findings suggest that strengthening the informal networks among neighbors is a powerful strategy to reduce physical IPV in contexts of poverty and segregation. Residential segregation have an impact on physical IPV, buy only indirectly. Contexts of segregation foster both the development of greater social ties among neighbors and the development of gender norms unfavorable to women. A greater intensity of neighborhood relations diminishes the likelihood of IPV. Gender norms that promote male control over women increases women’s risk of becoming victims of IPV. The overall effect of segregation shows that having support from the neighbors is a more relevant factor.
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Affiliation(s)
- Martín Benavides
- Department of Social Sciences. Pontificia Universidad Católica del Perú (PUCP), Lima, Perú. Senior Rechercher. Grupo de Analisis Para el Desarrollo (GRADE)
| | - Juan León
- Senior Rechercher. Grupo de Analisis Para el Desarrollo (GRADE). Lecturer, Universidad San Martín de Porres, Lima, Perú
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García-Gaipo L, Wiesinger A, Blanco R, León J, Delgado M. PO-104 Role of the oncosuppressor CTCF in the erythroid cell differentiation and regulation of erythroid genes. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.145] [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: 11/03/2022] Open
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13
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Barclay J, Creswell J, León J. Cancer immunotherapy and the PD-1/PD-L1 checkpoint pathway. ARCH ESP UROL 2018; 71:393-399. [PMID: 29745928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Long-term survival for patients with advanced bladder cancer is precarious, with a 5-year survival of just 5% in metastatic cases. Normally, the binding of PD-L1 to PD-1 alters the immune activity by modulating it to inhibit autoimmune diseases or chronic inflammation. However, some cancers use this route to block the immune response of the patient and continue growing. The new immunotherapy against bladder cancer aims to block the ability of tumor cells to resist patient' immune response by acting on the checkpoints of immune cells. These drugs are able to block the PD-1 receptor present on the surface of the lymphocytes, or the PD-L1 and PD-L2 ligands expressed by the cancer cells; this would prevent the binding of both blocking the immunomodulatory signal and allowing the T cells continue active against the tumor. The therapeutic target of Pembrolizumab and Nivolumab is PD-1, the receptor protein of PD-L1 in immune cells. The rest of molecules approved for different types of cancer such as Atezolizumab, Avelumab or Durvalumab act on the PD-L1 protein that is expressed in high concentrations in some cancer cells. The checkpoint inhibitors offer an effective alternative for patients for whom previously there were few options for durable responses, including those who are ineligible for cisplatin-based regimens or who are at risk of significant toxicity. This review describes the most recent data on agents that inhibit PD-L1, found on the surface of tumor cells, and PD-1 found on activated T and B cells and macrophages. Research is ongoing to further categorize responses, define ideal patient populations, and investigate combinations of checkpoint inhibitors to address multiple pathways in the functioning immune system.
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Affiliation(s)
- Jonathan Barclay
- Departamento de Urología. James Cook University Hospital. Middlesborough. Reino Unido
| | - Joanne Creswell
- Departamento de Urología. James Cook University Hospital. Middlesborough. Reino Unido
| | - Juan León
- Servicio de Urología. Hospital Comarcal Monforte. Monforte. Lugo. España
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Aminsharifi A, Brousell SC, Chang A, León J, Inman BA. Heat-targeted drug delivery: A promising approach for organsparing treatment of bladder cancer.THERMODOX®. ARCH ESP UROL 2018; 71:447-452. [PMID: 29745934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Disease recurrence and progression remain as significant challenges for the management of non-muscle invasive bladder cancer (NMIBC). In recent years, novel drugs and delivery systems have been investigated as strategies to reduce recurrence, progression and mortality. In this review, we focus on the role of intravesical hyperthermic chemotherapy and discuss a novel approach involving a heat-activated drug delivery system (ThermoDox®) that enables local accumulation of systemic chemotherapy.
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Affiliation(s)
- Alireza Aminsharifi
- División de Urología. Duke University Medical Center. Durham. NC. USA. Departamento de Urología. Shiraz University of Medical Sciences. Shiraz. Iran
| | - Steven C Brousell
- División de Urología. Duke University Medical Center. Durham. NC. USA
| | - Andrew Chang
- División de Urología. Duke University Medical Center. Durham. NC. USA
| | - Juan León
- Servicio de Urología. Comarcal Hospital of Monforte. Monforte. Lugo. España
| | - Brant A Inman
- División de Urología. Duke University Medical Center. Durham. NC. USA
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Cervantes L, Leyva J, Cortina R, Martinez Del Rio I, León J, Olea O, Biruete A. PT03.4: Effects of a Dextrose, Amino Acid, and L-Carnitine-Based Peritoneal Dialysis Solution on Nutritional Biomarkers in Incident Peritoneal Dialysis Patients. Clin Nutr 2017. [DOI: 10.1016/s0261-5614(17)30703-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Samso B, Ramos S, Malagón A, Gonzalez A, Bellsolà M, León J, Llobet M, Alba L, Pérez V, Martín L, Córcoles D. Restraint or not restraint. Involuntary transport from home of schizophrenic patients. Eur Psychiatry 2017. [DOI: 10.1016/j.eurpsy.2017.01.1645] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
IntroductionAlthough physical restraint (PR) is a non-rarely practice on psychiatry there are few studies that focus the attention on the risk factors for this intervention. PR is a legitimacy practice when is needed and well applied but is not free from side effects. Knowing risk factors might be useful to improve the application of PR.ObjectivesStudy the risk factors involved with the use of PR at patient's home in individuals with schizophrenia before the involuntary transport (IT) to a psychiatric facility.MethodsIs a descriptive and observational study of 267 psychotic patients that were assisted by a psychiatric home care unit (EMSE) in Barcelona during their IT. The sample was divided in two groups, depending on the need of PR. Socio-demographic data were collected as well as positive and negative syndrome scale (PANSS), WHO disability assessment schedule (WHO/DAS), global assessment of functioning scale (GAF), Scale to assess unawareness of mental disorder (SUMD). Aggressiveness was assessed by PANSS-EC consisting of 5 items: excitement, tension, hostility, uncooperativeness and poor impulse.ResultsFrom the 267 psychotic patients 109 required PR. 154 were male and the average of age was 47. The results were significant in the PR group versus no PR for PANSS-EC (P = 0.000), as well as WHO/DAS (P = 0.017), GAF (P = 0.042), Positive PANSS (P = 0.000), age (P = 0.001) and substance use (P = 0.012). Were no significant for gender, insight or Negative PANSS.ConclusionsAggressiveness and violence were the most important PR related factors followed by positive symptoms, age, substance use and global functioning.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Ruiz-Extremera A, Pavón-Castillero EJ, Florido M, Muñoz de Rueda P, Muñoz-Gámez JA, Casado J, Carazo A, Quiles R, Jiménez-Ruiz SM, Gila A, Luna JD, León J, Salmerón J. Influence of HLA class I, HLA class II and KIRs on vertical transmission and chronicity of hepatitis C virus in children. PLoS One 2017; 12:e0172527. [PMID: 28225833 PMCID: PMC5321427 DOI: 10.1371/journal.pone.0172527] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 02/06/2017] [Indexed: 12/12/2022] Open
Abstract
Background & aim There is evidence that maternal viral load of HCV during delivery influences the risk for Mother-to-child transmission (MTCT), but this does not explain all cases. We study the role of the immunogenetic profile (HLA, KIRs and KIR-ligand binding) of mothers and children in HCV-MTCT and in chronicity in the children. Methodology 79 HCV-RNA (+) mothers and their 98 children were included. 24 children were infected, becoming chronic in 8 cases and clearing in 16. HLA-class-I and II and KIRs were determined by Luminex. Results MTCT study: The presence of HLA-C1-ligand in mothers and/or their children reduces the risk of transmission (mothers: Pc = 0.011, children: P = 0.033), whereas the presence of HLA-C2C2-ligand in mothers increases it (Pc = 0.011). In children KIR2DL3-HLA-C1 is a protector factor (Pc = 0.011). Chronicity in children study: Maternal DQA1*01 allele (Pc = 0.027), KIR2DS1 (Pc = 0.011) or KIR3DS1 (Pc = 0.011) favours chronicity in the child. The presence of the DQB1*03 allele (Pc = 0.027) and KIR2DS3 (P = 0.056) in the child and homozygosity for KIR3DL1/3DL1 (Pc = 0.011) and for the HLA-Bw4/Bw4 ligand (P = 0.027) is associated with viral clearance, whereas the presence of HLA-Bw6 ligand (P = 0.027), the binding of KIR3DS1-HLA-Bw4 (P = 0.037) and heterozygosity for KIR3DL1/3DS1 (Pc = 0.011) favour viral chronicity. Mother/child allele matching: In the joint HLA analysis, matching was greater between mothers and children with chronic infection vs those who had cleared the virus (67%±4.1 vs 57%±1.2, P = 0.003). Conclusions The HLA-C1 ligand in the mother is related to MTCT, while several genetic factors of the mother or child are involved in the chronification or clearance of infection in the child. Matching allelic data is considered to be an indicator of HCV chronicity in the child and can be used as a potential prognostic test. This implies that NK cells may play a previously undocumented role in protecting against MTCT and that both NK cell immunity and adaptive T-cell responses may influence viral clearance in infected children.
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Affiliation(s)
- A. Ruiz-Extremera
- Paediatric Unit, San Cecilio University Hospital and Virgen de las Nieves University Hospital, Granada, Spain
- Paediatric Department, Granada University, Granada, Spain
- CIBER for Liver and Digestive Disease (CIBERehd), Instituto de Salud Carlos III, Spain
- Instituto de Investigación Biosanitaria de Granada, Spain
| | - E. J. Pavón-Castillero
- Instituto de Investigación Biosanitaria de Granada, Spain
- Clinical Management Unit of Digestive Diseases, Research Unit, San Cecilio University Hospital, Granada, Spain
- * E-mail:
| | - M. Florido
- Clinical Management Unit of Digestive Diseases, Research Unit, San Cecilio University Hospital, Granada, Spain
| | - P. Muñoz de Rueda
- CIBER for Liver and Digestive Disease (CIBERehd), Instituto de Salud Carlos III, Spain
- Instituto de Investigación Biosanitaria de Granada, Spain
- Clinical Management Unit of Digestive Diseases, Research Unit, San Cecilio University Hospital, Granada, Spain
| | - J. A. Muñoz-Gámez
- Instituto de Investigación Biosanitaria de Granada, Spain
- Clinical Management Unit of Digestive Diseases, Research Unit, San Cecilio University Hospital, Granada, Spain
| | - J. Casado
- Instituto de Investigación Biosanitaria de Granada, Spain
- Clinical Management Unit of Digestive Diseases, Research Unit, San Cecilio University Hospital, Granada, Spain
| | - A. Carazo
- Instituto de Investigación Biosanitaria de Granada, Spain
- Clinical Management Unit of Digestive Diseases, Research Unit, San Cecilio University Hospital, Granada, Spain
| | - R. Quiles
- CIBER for Liver and Digestive Disease (CIBERehd), Instituto de Salud Carlos III, Spain
- Instituto de Investigación Biosanitaria de Granada, Spain
- Clinical Management Unit of Digestive Diseases, Research Unit, San Cecilio University Hospital, Granada, Spain
| | - S. M. Jiménez-Ruiz
- Clinical Management Unit of Digestive Diseases, Research Unit, San Cecilio University Hospital, Granada, Spain
- Medicine Department, Granada University, Granada, Spain
| | - A. Gila
- CIBER for Liver and Digestive Disease (CIBERehd), Instituto de Salud Carlos III, Spain
- Instituto de Investigación Biosanitaria de Granada, Spain
- Clinical Management Unit of Digestive Diseases, Research Unit, San Cecilio University Hospital, Granada, Spain
| | - J. D. Luna
- Instituto de Investigación Biosanitaria de Granada, Spain
- Biostatistic Department, Granada University, Granada, Spain
| | - J. León
- CIBER for Liver and Digestive Disease (CIBERehd), Instituto de Salud Carlos III, Spain
- Instituto de Investigación Biosanitaria de Granada, Spain
- Clinical Management Unit of Digestive Diseases, Research Unit, San Cecilio University Hospital, Granada, Spain
| | - J. Salmerón
- CIBER for Liver and Digestive Disease (CIBERehd), Instituto de Salud Carlos III, Spain
- Instituto de Investigación Biosanitaria de Granada, Spain
- Clinical Management Unit of Digestive Diseases, Research Unit, San Cecilio University Hospital, Granada, Spain
- Medicine Department, Granada University, Granada, Spain
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Abstract
A clinical workstation was developed to provide basic telemedicine services in a medical clinic in rural Ecuador. The unit cost was less than $1000. The system provided videoconferencing and a Spanish language electronic medical record (EMR) for clinic consultations. All partners participated in the development of the EMR. Over a six-month period, almost all new patient encounters and ultrasound studies were entered into the EMR. Of 2387 patient encounters, 572 were recorded in electronic format and 80% were transmitted over the Internet for consultation. Four hundred and eight ultrasound studies were filed with the EMR and 90% were transmitted over the Internet for shared evaluation. During the six months of the study, there were no serious software or hardware problems. The doctor in Ecuador was initially trained at the laboratory in the USA. The two sites were in contact by email almost daily. Without such interaction, the performance of the software and hardware would probably have been worse. When a structured programme of instruction, protocols, EMR and technology support is in place, telemedicine can support remote rural practice.
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Affiliation(s)
- Stephen W Cone
- Medical Informatics and Technology Applications Consortium, Department of Surgery, Virginia Commonwealth University, Richmond, VA 23298, USA
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Menéndez I I, Hermida L, Hernández A, Aguilar JC, Garateix R, Molina R, Pérez D, Rodríguez MP, León J, Falcón V. Characterization nanoparticles-based vaccines and vaccine candidates: a Transmission Electron Microscopy study. RB 2016. [DOI: 10.21931/rb/2016.01.02.7] [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: 11/09/2022] Open
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Cueto S, León J, Miranda A, Dearden K, Crookston BT, Behrman JR. Does pre-school improve cognitive abilities among children with early-life stunting? A longitudinal study for Peru. Int J Educ Res 2015; 75:102-114. [PMID: 28428683 PMCID: PMC5394429 DOI: 10.1016/j.ijer.2015.09.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Several studies in developing countries have found that children who experience growth faltering in the first years of life show lower cognitive abilities than their peers. In this study, we use the Young Lives longitudinal dataset in Peru to analyze if attending pre-school affects cognitive abilities at age five years, and if there is an interaction with HAZ at age one year. Using instrumental variables we found, for receptive vocabulary, a positive effect of attending Jardines (formal) pre-schools; the effect of attending PRONOEI (community-based) pre-schools was not significant. More years attending Jardines was more beneficial for children who were better nourished. We suggest working to improve the quality of PRONOEIs, and with teachers on targeting children of lower nutritional status.
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Affiliation(s)
- Santiago Cueto
- Group for the Analysis of Development, Av. Grau 915, Barranco, Lima 4, Peru
| | - Juan León
- Group for the Analysis of Development, Av. Grau 915, Barranco, Lima 4, Peru
| | - Alejandra Miranda
- Group for the Analysis of Development, Av. Grau 915, Barranco, Lima 4, Peru
| | - Kirk Dearden
- Center for Global Health & Development, Boston University, Crosstown Center, 801 Massachusetts Avenue Boston, MA 02118, United States
| | - Benjamin T Crookston
- The College of Life Sciences, Brigham Young University, 2137 LSB Provo UT 84602, United States
| | - Jere R Behrman
- University of Pennsylvania, 3718 Locust Walk, Philadelphia, PA 19104, United States
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Oppliger F, Wiedmaier G, León J. Acute small bowel obstruction due to the connecting tube of a gastric band. Surg Obes Relat Dis 2014; 10:e77-9. [PMID: 25066437 DOI: 10.1016/j.soard.2014.03.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 03/26/2014] [Accepted: 03/27/2014] [Indexed: 11/29/2022]
Affiliation(s)
- Federico Oppliger
- General Surgery Resident, Universidad del Desarrollo - Clínica Alemana, Santiago, Chile.
| | | | - Juan León
- Surgery Unit Emergency Department, Clínica Alemana, Santiago, Chile
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García-Gutiérrez L, Bretones G, Arechaga I, Santamaría D, Barbacid M, León J. 304: Myc mediates the phosphorylation and degradation of p27 through activation of Cyclin A/CDK1. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)50270-5] [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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Pinos VH, Ortiz-Prado E, Bermeo C, León J, Armijos L, Almeida E. A unique case of facial burn superinfected with Dermatobia Hominis larvae resulting in a bilateral enucleation of the eyes. Trop Doct 2014; 44:235-7. [PMID: 24728977 DOI: 10.1177/0049475514531257] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We present a case of a female Ecuadorian patient who presented a deep facial burn injury complicated with a severe infestation of Dermatobia Hominis larvae. The burn injury was complicated by severe myiasis attributable to the poor management of the wound received at home, using tropical plants, which caused a secondary infection and severe necrosis of the tissue involving the forehead, cheeks, chin, scalp, nose, mouth and the eyes resulting in a bilateral enucleation and long inpatient hospital care.
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Affiliation(s)
- Victor Hugo Pinos
- Attending Physician, Department of Dermatology, Hospital San Francisco de Quito, Ecuador
| | - Esteban Ortiz-Prado
- Association Professor, Faculty of Medicine, Department of Physiology, Universidad de las Américas, Ecuador
| | - Carlos Bermeo
- Resident, Department of Plastic Surgery, Hospital Eugenio Espejo, Ecuador
| | - Juan León
- Resident, Department of Plastic Surgery, Hospital Eugenio Espejo, Ecuador
| | | | - Estibaliz Almeida
- Resident, Department of Plastic Surgery, Hospital Eugenio Espejo, Ecuador
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Maluenda F, León J, Csendes A, Burdiles P, Giordano J, Molina M. Single-incision laparoscopic sleeve gastrectomy: initial experience in 20 patients and 2-year follow-up. Eur Surg 2014; 46:32-37. [PMID: 24563650 PMCID: PMC3926978 DOI: 10.1007/s10353-013-0246-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 12/17/2013] [Indexed: 11/25/2022]
Abstract
Background The transumbilical route began being clinically feasible with or without unique access devices. Setting The setting for this study was a private practice at Clínica Las Condes, Santiago, Chile. Objective The objective was to describe our experience performing a laparoscopic sleeve gastrectomy (LSG) via transumbilical route using a single-port access device in addition to standard laparoscopic instruments. Method A prospective nonrandomized protocol was applied to patients fulfilling the following inclusion criteria: to have been medically indicated for an LSG, to have a body mass index (BMI) of less than or equal to 40 kg/m2, and the distance between the xiphoid appendix and umbilicus should be less than 22 cm. All patients were female with a median (p50) age of 34.5 (ranging from 21 to 57) years, a median weight of 92 (ranging from 82.5 to 113) kg, and a median BMI of 35.1 (ranging from 30.5 to 40) kg/m2. The device insertion technique, the gastrectomy, and postoperative management are described. Results LSG via transumbilical route was successfully carried out in 19 of the 20 patients in whom the procedure was performed; one patient had to be converted to a conventional laparoscopic procedure. Mean operating time was 127 (ranging from 90 to 170) min. On the second postoperative day, all patients were assessed through an upper gastrointestinal barium-contrasted radiological series. There was neither morbidity nor mortality in this group. Excess weight loss at 25 months after surgery was 114 %. Conclusions Single-port LSG can be successfully performed in selected obese patients with a BMI of less than 40 kg/m2 using traditional laparoscopic instruments. The technique allows performing a safe and effective vertical gastrectomy.
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Affiliation(s)
- F Maluenda
- Department of Surgery, Clínica Las Condes, Lo Fontecilla 441, 7591046 Las Condes, Santiago Chile ; Department of Surgery, University Hospital, University of Chile, Santiago, Chile
| | - J León
- Clínica Alemana, Santiago, Chile
| | - A Csendes
- Department of Surgery, University Hospital, University of Chile, Santiago, Chile
| | - P Burdiles
- Department of Surgery, Clínica Las Condes, Lo Fontecilla 441, 7591046 Las Condes, Santiago Chile
| | - J Giordano
- Department of Surgery, Clínica Las Condes, Lo Fontecilla 441, 7591046 Las Condes, Santiago Chile
| | - M Molina
- Department of Surgery, Clínica Las Condes, Lo Fontecilla 441, 7591046 Las Condes, Santiago Chile
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Artacho Cordón F, Román Marinetto E, Ríos Arrabal S, Storch K, Expósito J, León J, Salinas Asensio M, Calvente I, Cordes N, Núñez Torres M. Radiosensitivity enhancement and MMP modulation: A dual role for epigenetic drugs in breast radiotherapy. Rep Pract Oncol Radiother 2013. [DOI: 10.1016/j.rpor.2013.03.640] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Ríos Arrabal S, Román Marinetto E, Artacho Cordón F, León J, Expósito J, Salinas M, Calvente I, Martínez Galán J, Argote Camacho A, Torné P, Núñez Torres M. Radiotherapy outcome could be influenced by antioxidant capacity in breast cancer cell lines. Rep Pract Oncol Radiother 2013. [DOI: 10.1016/j.rpor.2013.03.110] [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: 10/26/2022] Open
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28
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Román Marinetto E, Jiménez G, Ríos Arrabal S, Artacho Cordón F, Expósito J, López Ruiz E, Ramírez A, León J, Marchal J, Núñez Torres M. Stem-like cells from breast cancer: Crucial players in celullar response to radiotherapy. Rep Pract Oncol Radiother 2013. [DOI: 10.1016/j.rpor.2013.03.641] [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: 10/26/2022] Open
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29
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León J, Echeverría M, Badía D, Martí C, Álvarez C. Effectiveness of wood chips cover at reducing erosion in two contrasted burnt soils. ACTA ACUST UNITED AC 2013. [DOI: 10.1127/0372-8854/2012/s-00086] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [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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30
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Sandino M, Navarrete M, León J, Zambrano S, Lozano T. Melanoma genital. Clínica e Investigación en Ginecología y Obstetricia 2012. [DOI: 10.1016/j.gine.2011.03.002] [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: 11/15/2022]
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31
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Gómez-Casares MT, García-Alegria E, López-Jorge CE, Ferrándiz N, Blanco R, Alvarez S, Vaqué JP, Bretones G, Caraballo JM, Sánchez-Bailón P, Delgado MD, Martín-Perez J, Cigudosa JC, León J. MYC antagonizes the differentiation induced by imatinib in chronic myeloid leukemia cells through downregulation of p27(KIP1.). Oncogene 2012; 32:2239-46. [PMID: 22710719 DOI: 10.1038/onc.2012.246] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Chronic myeloid leukemia (CML) progresses from a chronic to a blastic phase where the leukemic cells are proliferative and undifferentiated. The CML is nowadays successfully treated with BCR-ABL kinase inhibitors as imatinib and dasatinib. In the CML-derived K562 cell line, low concentrations of imatinib induce proliferative arrest and erythroid differentiation. We found that imatinib upregulated the cell cycle inhibitor p27(KIP1) (p27) in a time- and -concentration dependent manner, and that the extent of imatinib-mediated differentiation was severely decreased in cells with depleted p27. MYC (c-Myc) is a transcription factor frequently deregulated in human cancer. MYC is overexpressed in untreated CML and is associated to poor response to imatinib. Using K562 sublines with conditional MYC expression (induced by Zn(2+) or activated by 4-hydroxy-tamoxifen) we show that MYC prevented the erythroid differentiation induced by imatinib and dasatinib. The differentiation inhibition is not due to increased proliferation of MYC-expressing clones or enhanced apoptosis of differentiated cells. As p27 overexpression is reported to induce erythroid differentiation in K562, we explored the effect of MYC on imatinib-dependent induction of p27. We show that MYC abrogated the imatinib-induced upregulation of p27 concomitantly with the differentiation inhibition, suggesting that MYC inhibits differentiation by antagonizing the imatinib-mediated upregulation of p27. This effect occurs mainly by p27 protein destabilization. This was in part due to MYC-dependent induction of SKP2, a component of the ubiquitin ligase complex that targets p27 for degradation. The results suggest that, although MYC deregulation does not directly confer resistance to imatinib, it might be a factor that contributes to progression of CML through the inhibition of differentiation.
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Affiliation(s)
- M T Gómez-Casares
- Servicio de Hematología and Unidad de Investigación, Hospital Universitario Dr Negrín, Las Palmas, Spain
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32
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Caballero T, Gila A, Sánchez-Salgado G, Muñoz de Rueda P, León J, Delgado S, Muñoz JA, Caba-Molina M, Carazo A, Ruiz-Extremera A, Salmerón J. Histological and immunohistochemical assessment of liver biopsies in morbidly obese patients. Histol Histopathol 2012; 27:459-66. [PMID: 22374723 DOI: 10.14670/hh-27.459] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS To study liver lesions in morbidly obese patients who underwent liver biopsy at the time of bariatric surgery to define histological lesions, especially inflammatory infiltrate, diagnostic categories and the possible influence of gender in this respect. METHODS AND RESULTS 110 biopsies (36 males-M- and 76 females -F-) were evaluated and categorised, according to the NAS (NAFLD -non alcoholic fatty liver disease- Activity Score) system and other criteria, as non-NAFLD (15.5%, F predominance), non-alcoholic steatohepatitis (NASH) (16.5%, M predominance), non-alcoholic hepatosteatosis (NAHS) (21%, F predominance) and, the most numerous group, NASH-borderline (NASH-BORD) (47%), with three subgroups, characterised by centrozonal lesions, portal area preferential involvement or affecting both areas. The predominant form of hepatocytesteatosis was mixed with a multivesicular component that was present in most cases with fibroinflammatory portal involvement. Nuclear glycogenosomes were found in greater number of biopsies in patients in the third and sixth decades. Portal inflammation was present in a large number of cases (M predominance); the application of immunohistochemical techniques (myeloperoxidase and CD68 antibodies) to evaluate lobular inflammation revealed "surgical hepatitis" in one third of the cases, and the presence of microgranulomas (CD68+) (M predominance), which were more abundant with increasing lesion severity. CONCLUSIONS Portal inflammation and multivesicular hepatocytesteatosis are highly prevalent in morbidly obese patients. This study identifies a new subtype of NASH-BORD characterized by centrizonal and porto-periportal area involvement and the existence of liver biopsies without steatosis. CD68+ microgranulomas constitute an unequivocal marker of lobular inflammation in surgical biopsies and of lesion severity, which is gender-related.
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Affiliation(s)
- T Caballero
- Pathology Department, San Cecilio University Hospital, Granada (HUSC) and School of Medicine, University of Granada, Spain.
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Abstract
We propose a feasible experimental test of a 1D version of the Fermi problem using superconducting qubits. We give an explicit nonperturbative proof of strict causality in this model, showing that the probability of excitation of a two-level artificial atom with a dipolar coupling to a quantum field is completely independent of the other qubit until signals from it may arrive. We explain why this is in perfect agreement with the existence of nonlocal correlations and previous results which were used to claim apparent causality problems for Fermi's two-atom system.
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Affiliation(s)
- Carlos Sabín
- Instituto de Física Fundamental, CSIC, Serrano 113-B, 28006 Madrid, Spain
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34
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Sandino M, León J, Gómez-Soto P, Conde J, Ruano A, Navarrete M, Casla A. Carcinoma psamomatoso ovárico bilateral. Clínica e Investigación en Ginecología y Obstetricia 2011. [DOI: 10.1016/j.gine.2009.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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León J, Flacker A, Vaz AR, Veríssimo C, de Moraes MB, Moshkalev SA. Electrical characterization of multi-walled carbon nanotubes. J Nanosci Nanotechnol 2010; 10:6234-6239. [PMID: 21133180 DOI: 10.1166/jnn.2010.2585] [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] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Electrical characteristics of multi-walled carbon nanotubes (MWNTs) grown by chemical vapor deposition have been investigated as a function of the bias voltage, nanotubes length and temperature, in 2 and 4 terminal configurations. Nanotubes were deposited over metal electrodes using ac dielectrophoresis method. For better contacts between the nanotubes and electrodes, Ni and Pd films were deposited by an electroless deposition technique. Differential conductance was found to rise considerably with bias, and this effect was more pronounced for Ni. Using 2 and 4 terminal configurations, electrical resistance measurements for individual MWNTs were performed, and the results were interpreted using the model of nanotube as a resistive transmission line, where current at low bias flows mainly through the two outermost shells.
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Affiliation(s)
- J León
- Center for Semiconductor Components-CCS, UNICAMRF C.R 6061, CEP 13083-870, Campinas, SFP, Brazil
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36
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Acevedo A, León J. Ambulatory hernia surgery under local anesthesia is feasible and safe in obese patients. Hernia 2009; 14:57-62. [DOI: 10.1007/s10029-009-0567-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Accepted: 09/18/2009] [Indexed: 11/28/2022]
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37
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Lamata L, León J, Pérez-García D, Salgado D, Solano E. Sequential implementation of global quantum operations. Phys Rev Lett 2008; 101:180506. [PMID: 18999808 DOI: 10.1103/physrevlett.101.180506] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2008] [Indexed: 05/27/2023]
Abstract
We study the possibility for a global unitary applied on an arbitrary number of qubits to be decomposed in a sequential unitary procedure, where an ancillary system is allowed to interact only once with each qubit. We prove that sequential unitary decompositions are in general impossible for genuine entangling operations, even with an infinite-dimensional ancilla, being the controlled-NOT gate a paradigmatic example. Nevertheless, we find particular nontrivial operations in quantum information that can be performed in a sequential unitary manner, as is the case of quantum error correction and quantum cloning.
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Affiliation(s)
- L Lamata
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching, Germany
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38
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Luque I, Echeita A, León J, Herrera-León S, Tarradas C, González-Sanz R, Huerta B, Astorga RJ. Salmonella Indiana as a cause of abortion in ewes: Genetic diversity and resistance patterns. Vet Microbiol 2008; 134:396-9. [PMID: 18823722 DOI: 10.1016/j.vetmic.2008.08.015] [Citation(s) in RCA: 19] [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] [Received: 07/02/2008] [Revised: 07/31/2008] [Accepted: 08/14/2008] [Indexed: 11/24/2022]
Abstract
Salmonella enterica subspecies enterica Indiana, a food-borne serovar uncommon in most countries, was responsible for an outbreak of abortion in a flock of Lacaune dairy ewes in southern Spain. Drinking water and feedstuff samples were analysed in an attempt to determine the source of the infection. Pigeons (Columba livia) and turtledoves (Streptopelia turtur) in close contact with the ewes were captured and examined for the bacterium. Seventeen S. Indiana strains were isolated from the ewes and wild birds and the genetic similarity among them analysed by Pulsed Field Gel Electrophoresis (PFGE) after the digestion of their genomic DNA with the restriction enzyme XbaI. The results suggest the wild birds might be responsible for the outbreak in the ewes. The strains recovered were fully susceptible to 15 out of the 16 antimicrobial agents tested: ampicillin, amoxycillin clavulanate, cephalothin, ceftriaxone, gentamicin, neomycin, streptomycin, tetracycline, ciprofloxacin, enrofloxacin, sulphonamides, trimethoprim-sulphamethoxazole, apramycin, colistin and chloramphenicol. Differences in the resistance pattern to nalidixic acid were observed; 11 strains (64.7%) were nalidixic acid resistant (R-Nx) and 6 (35.3%) sensitive (S-Nx). Among the R-Nx strains, a substitution of Gly to Cys at position 81 (Gly81àCys) of the gyrA gene in 10 strains isolated from wild birds and ovine foetuses, and of Asp to Tyr at position 87 (Asp87àTyr) in one strain isolated from ewe faeces, were revealed by sequencing the gene. To control the outbreak, enrofloxacin treatment was administered for 5 days. The same therapy was used to prevent infection during following gestation cycles, administering the antimicrobial agent at presentation and over 4 weeks before birth. Anti-bird meshes and closed drinking and feeding troughs were also installed to prevent further contact of the ewes with wild birds.
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Affiliation(s)
- I Luque
- Animal Health Department, Veterinary Faculty, Cordoba, Spain.
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39
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López C, Ajenjo N, Muñoz-Alonso MJ, Farde P, León J, Gómez-Cimiano J. Determination of Viability of Human Cartilage Allografts by a Rapid and Quantitative Method Not Requiring Cartilage Digestion. Cell Transplant 2008; 17:859-64. [DOI: 10.3727/096368908786516783] [Citation(s) in RCA: 7] [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] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Fresh osteochondral allograft transplantation is increasingly used for the treatment of cartilage pathologies of the knee. It is believed that transplantation success depends on the presence of viable chondrocytes in the graft, but methods to evaluate graft viability require the isolation of chondrocytes by enzymatic digestion of the cartilage and/or the use of radioactive precursors. We have adapted the well-known cell viability assay based on the reduction of tetrazolium derivatives to evaluate cartilage viability. We took advantage from the histological properties of cartilage tissue and the fact that some tetrazolium derivatives (e.g., WST-1, XTT) give soluble reduction products that can permeate the hyaline cartilage matrix. We have validated this assay in human cartilage explants from arthrotomy interventions and deceased donors, measuring the reduced product in the explant supernatant. Using this method we have compared the performance of several culture media in cartilage viability. From those tested, DMEM supplemented with fetal bovine serum results in higher viability of the cartilage and the explants remain viable at least 15 days in culture at 37°C. Cartilage cells continued expressing chondrocyte-specific genes, suggesting the maintenance of chondrogenic phenotype. The described method offers a quantitative and convenient method to measure the viability of human cartilage grafts.
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Affiliation(s)
- Carmen López
- Departmento de Biología Molecular, Instituto de Biomedicina y Biotecnologia, CSIC, Universidad de Cantabria, Santander, Spain
| | - Nuria Ajenjo
- Departmento de Biología Molecular, Instituto de Biomedicina y Biotecnologia, CSIC, Universidad de Cantabria, Santander, Spain
| | - Maria J. Muñoz-Alonso
- Departmento de Biología Molecular, Instituto de Biomedicina y Biotecnologia, CSIC, Universidad de Cantabria, Santander, Spain
| | - Pilar Farde
- Departmento de Biología Molecular, Instituto de Biomedicina y Biotecnologia, CSIC, Universidad de Cantabria, Santander, Spain
| | - J. León
- Departmento de Biología Molecular, Instituto de Biomedicina y Biotecnologia, CSIC, Universidad de Cantabria, Santander, Spain
| | - J. Gómez-Cimiano
- Servicio de Artroscopias, Hospital Universitario Marqués de Valdecilla, Santander, Spain
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40
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Casanova LA, Flores C, Samanez C, León J. Evolution and prognosis of adult patients with non-Hodgkin lymphoma. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.19527] [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: 11/20/2022] Open
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41
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Neciosup S, Quintana S, Gómez H, Mas L, Samanez C, Casanova L, Olivera M, Flores C, León J. 4540 POSTER Cyclophosphamide and cisplatin is an effective treatment in patients with stage II and III seminoma. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)71171-0] [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] Open
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42
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Lamata L, León J, Schätz T, Solano E. Dirac equation and quantum relativistic effects in a single trapped ion. Phys Rev Lett 2007; 98:253005. [PMID: 17678023 DOI: 10.1103/physrevlett.98.253005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2007] [Indexed: 05/16/2023]
Abstract
We present a method of simulating the Dirac equation in 3+1 dimensions for a free spin-1/2 particle in a single trapped ion. The Dirac bispinor is represented by four ionic internal states, and position and momentum of the Dirac particle are associated with the respective ionic variables. We show also how to simulate the simplified 1+1 case, requiring the manipulation of only two internal levels and one motional degree of freedom. Moreover, we study relevant quantum-relativistic effects, like the Zitterbewegung and Klein's paradox, the transition from massless to massive fermions, and the relativistic and nonrelativistic limits, via the tuning of controllable experimental parameters.
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Affiliation(s)
- L Lamata
- Instituto de Matemáticas y Física Fundamental, CSIC, Serrano 113-bis, 28006 Madrid, Spain
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43
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Abstract
Not all unitary operations upon a set of qubits can be implemented by sequential interactions between each qubit and an ancillary system. We analyze the specific case of sequential quantum cloning, 1-->M, and prove that the minimal dimension D of the ancilla grows linearly with the number of clones M. In particular, we obtain D=2M for symmetric universal quantum cloning and D=M+1 for symmetric phase-covariant cloning. Furthermore, we provide a recipe for the required ancilla-qubit interactions in each step of the sequential procedure for both cases.
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Affiliation(s)
- Y Delgado
- Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, Apartado Postal 1761, Lima, Peru
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44
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Fernandez-Garcia B, Vaqué JP, Herreros-Villanueva M, Marques-Garcia F, Castrillo F, Fernandez-Medarde A, León J, Marín MC. p73 cooperates with Ras in the activation of MAP kinase signaling cascade. Cell Death Differ 2006; 14:254-65. [PMID: 16645632 DOI: 10.1038/sj.cdd.4401945] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [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: 11/09/2022] Open
Abstract
The p73 gene is capable of inducing cell cycle arrest, apoptosis, senescence, differentiation and to cooperate with oncogenic Ras in cellular transformation. Ras can be considered as a branch point in signal transduction, where diverse extracellular stimuli converge. The intensity of the mitogen-activated protein kinase (MAPK) cascade activation influences the cellular response to Ras. Despite the fundamental role of p53 in Ras-induced growth arrest and senescence, it remains unclear how the Ras/MEK/ERK pathway induces growth arrest in the absence of p53. We report here that oncogenic Ras stabilizes p73 resulting in p73 accumulation and enhancement of its activity. p73, in turn, induces a sustained activation of the MAP kinase cascade synergizing with oncogenic Ras. We also found that inhibition of p73 function modifies the cellular outcome to Ras activation inhibiting Ras-dependent differentiation. Here, we show for the first time that there is a signaling loop between Ras-dependent MAPK cascade activation and p73 function.
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Affiliation(s)
- B Fernandez-Garcia
- Instituto de Biomedicina, Universidad de León, Campus de Vegazana, León 24071, Spain
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45
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Socas-Macías M, Suárez-Artacho G, Valera-Sánchez Z, Suárez-Grau JM, Alamo-Martín JM, Madrid L, León J. [Local recurrence 40 years after Halsted mastectomy]. Cir Esp 2006; 78:119. [PMID: 16420811 DOI: 10.1016/s0009-739x(05)70904-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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46
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Lamata L, León J. Dealing with entanglement of continuous variables: Schmidt decomposition with discrete sets of orthogonal functions. ACTA ACUST UNITED AC 2005. [DOI: 10.1088/1464-4266/7/8/004] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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47
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Casanova L, Venegas D, Paola M, León J, Flores C. Observation vs ESHAP as consolidation therapy in stages III-IV non-Hodgkin’s lymphoma in patients with complete remission with CHOP: Non-randomized comparative study. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.6690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- L. Casanova
- Inst de Enfermedades Neoplasicas, Lima, Peru
| | - D. Venegas
- Inst de Enfermedades Neoplasicas, Lima, Peru
| | - M. Paola
- Inst de Enfermedades Neoplasicas, Lima, Peru
| | - J. León
- Inst de Enfermedades Neoplasicas, Lima, Peru
| | - C. Flores
- Inst de Enfermedades Neoplasicas, Lima, Peru
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48
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Vidaurre T, Neciosup S, Pinto J, Torrico C, Gómez H, Mas L, León J, León L, Carracedo C, Vallejos C. Osteosarcoma: Experience at Instituto Especializado de Enfermedades Neoplásicas (1985–2000). J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.9081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- T. Vidaurre
- Inst de Enfermedades Neoplasicas, Lima, Peru
| | - S. Neciosup
- Inst de Enfermedades Neoplasicas, Lima, Peru
| | - J. Pinto
- Inst de Enfermedades Neoplasicas, Lima, Peru
| | - C. Torrico
- Inst de Enfermedades Neoplasicas, Lima, Peru
| | - H. Gómez
- Inst de Enfermedades Neoplasicas, Lima, Peru
| | - L. Mas
- Inst de Enfermedades Neoplasicas, Lima, Peru
| | - J. León
- Inst de Enfermedades Neoplasicas, Lima, Peru
| | - L. León
- Inst de Enfermedades Neoplasicas, Lima, Peru
| | | | - C. Vallejos
- Inst de Enfermedades Neoplasicas, Lima, Peru
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49
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Rodriguez W, Castañeda C, Vallejos C, Casanova L, Carracedo C, León J, Gómez H, Ferreyros G, Flores C, Mas L. Acute lymphatic leukemia: Peruvian experience. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.6726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- W. Rodriguez
- Inst de Enfermedades Neoplasicas, Lima, Peru; Instituto de Enfermedades Neoplasicas; Intituto de Enfermedades Neoplasicas, Lima, Peru
| | - C. Castañeda
- Inst de Enfermedades Neoplasicas, Lima, Peru; Instituto de Enfermedades Neoplasicas; Intituto de Enfermedades Neoplasicas, Lima, Peru
| | - C. Vallejos
- Inst de Enfermedades Neoplasicas, Lima, Peru; Instituto de Enfermedades Neoplasicas; Intituto de Enfermedades Neoplasicas, Lima, Peru
| | - L. Casanova
- Inst de Enfermedades Neoplasicas, Lima, Peru; Instituto de Enfermedades Neoplasicas; Intituto de Enfermedades Neoplasicas, Lima, Peru
| | - C. Carracedo
- Inst de Enfermedades Neoplasicas, Lima, Peru; Instituto de Enfermedades Neoplasicas; Intituto de Enfermedades Neoplasicas, Lima, Peru
| | - J. León
- Inst de Enfermedades Neoplasicas, Lima, Peru; Instituto de Enfermedades Neoplasicas; Intituto de Enfermedades Neoplasicas, Lima, Peru
| | - H. Gómez
- Inst de Enfermedades Neoplasicas, Lima, Peru; Instituto de Enfermedades Neoplasicas; Intituto de Enfermedades Neoplasicas, Lima, Peru
| | - G. Ferreyros
- Inst de Enfermedades Neoplasicas, Lima, Peru; Instituto de Enfermedades Neoplasicas; Intituto de Enfermedades Neoplasicas, Lima, Peru
| | - C. Flores
- Inst de Enfermedades Neoplasicas, Lima, Peru; Instituto de Enfermedades Neoplasicas; Intituto de Enfermedades Neoplasicas, Lima, Peru
| | - L. Mas
- Inst de Enfermedades Neoplasicas, Lima, Peru; Instituto de Enfermedades Neoplasicas; Intituto de Enfermedades Neoplasicas, Lima, Peru
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Abstract
N-methyl-D-aspartate (NMDA) receptor activation comprises multiple regulatory sites controlling Ca2+ influx into the cell. NMDA-induced increases in intracellular [Ca(+2)] lead to nitric oxide (NO) production through activation of neuronal NO synthase (nNOS). Melatonin inhibits either glutamate or NMDA-induced excitation, but the mechanism of this inhibition is unknown. In the present study, the mechanism of melatonin action in the rat striatum was studied using extracellular single unit recording of NMDA-dependent neuronal activity with micro-iontophoresis. Melatonin inhibited neuronal excitation produced by either NMDA or L-arginine. The effects of both NMDA and L-arginine were blocked by nitro-L-arginine methyl ester, suggesting that nNOS participates in responses to NMDA. However, excitation of NMDA-sensitive neurones induced by the NO donor sodium nitroprusside was only slightly modified by melatonin. Melatonin iontophoresis also counteracted excitation induced by tris(2-carboxyethyl)phosphine hydrochloride, showing that the redox site of the NMDA receptor may be a target for melatonin action. The lack of effects of the membrane melatonin receptor ligands luzindole, 4-phenyl-2-propionamidotetralin and 5-methoxycarbonylamino-N-acetyltryptamine, and the nuclear melatonin ligand, CGP 52608, a thiazolidine dione, excluded the participation of known membrane and nuclear receptors for melatonin. The data suggest that inhibition of NMDA-dependent excitation by melatonin involves both nNOS inhibition and redox site modulation.
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Affiliation(s)
- G Escames
- Departamento de Fisiología, Instituto de Biotecnología, Universidad de Granada, Granada, Spain
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