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1.
J Dent Res ; 102(12): 1285-1287, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37772930
2.
J Dent Res ; 97(5): 515-522, 2018 05.
Artículo en Inglés | MEDLINE | ID: mdl-29364747

RESUMEN

We present association results from a large genome-wide association study of tooth agenesis (TA) as well as selective TA, including 1,944 subjects with congenitally missing teeth, excluding third molars, and 338,554 controls, all of European ancestry. We also tested the association of previously identified risk variants, for timing of tooth eruption and orofacial clefts, with TA. We report associations between TA and 9 novel risk variants. Five of these variants associate with selective TA, including a variant conferring risk of orofacial clefts. These results contribute to a deeper understanding of the genetic architecture of tooth development and disease. The few variants previously associated with TA were uncovered through candidate gene studies guided by mouse knockouts. Knowing the etiology and clinical features of TA is important for planning oral rehabilitation that often involves an interdisciplinary approach.


Asunto(s)
Anodoncia/genética , Anodoncia/epidemiología , Anodoncia/etiología , Femenino , Estudio de Asociación del Genoma Completo , Humanos , Islandia/epidemiología , Masculino , Polimorfismo de Nucleótido Simple/genética , Factores de Riesgo
3.
Transl Psychiatry ; 7(4): e1109, 2017 04 25.
Artículo en Inglés | MEDLINE | ID: mdl-28440815

RESUMEN

Several copy number variants have been associated with neuropsychiatric disorders and these variants have been shown to also influence cognitive abilities in carriers unaffected by psychiatric disorders. Previously, we associated the 15q11.2(BP1-BP2) deletion with specific learning disabilities and a larger corpus callosum. Here we investigate, in a much larger sample, the effect of the 15q11.2(BP1-BP2) deletion on cognitive, structural and functional correlates of dyslexia and dyscalculia. We report that the deletion confers greatest risk of the combined phenotype of dyslexia and dyscalculia. We also show that the deletion associates with a smaller left fusiform gyrus. Moreover, tailored functional magnetic resonance imaging experiments using phonological lexical decision and multiplication verification tasks demonstrate altered activation in the left fusiform and the left angular gyri in carriers. Thus, by using convergent evidence from neuropsychological testing, and structural and functional neuroimaging, we show that the 15q11.2(BP1-BP2) deletion affects cognitive, structural and functional correlates of both dyslexia and dyscalculia.


Asunto(s)
Cognición/fisiología , Variaciones en el Número de Copia de ADN/genética , Discalculia/genética , Dislexia/genética , Discapacidad Intelectual/genética , Adolescente , Adulto , Anciano , Aberraciones Cromosómicas , Deleción Cromosómica , Cromosomas Humanos Par 15/genética , Discapacidades del Desarrollo/genética , Femenino , Neuroimagen Funcional/métodos , Neuroimagen Funcional/normas , Heterocigoto , Humanos , Islandia/epidemiología , Imagen por Resonancia Magnética/métodos , Masculino , Persona de Mediana Edad , Pruebas Neuropsicológicas/normas , Fenotipo , Lóbulo Temporal/anatomía & histología , Lóbulo Temporal/diagnóstico por imagen , Adulto Joven
4.
Breast Cancer Res Treat ; 160(1): 51-59, 2016 11.
Artículo en Inglés | MEDLINE | ID: mdl-27620882

RESUMEN

PURPOSE: Improved therapies and imaging modalities are needed for the treatment of breast cancer brain metastases (BCBM). ANG1005 is a drug conjugate consisting of paclitaxel covalently linked to Angiopep-2, designed to cross the blood-brain barrier. We conducted a biomarker substudy to evaluate 18F-FLT-PET for response assessment. METHODS: Ten patients with measurable BCBM received ANG1005 at a dose of 550 mg/m2 IV every 21 days. Before and after cycle 1, patients underwent PET imaging with 18F-FLT, a thymidine analog, retention of which reflects cellular proliferation, for comparison with gadolinium-contrast magnetic resonance imaging (Gd-MRI) in brain metastases detection and response assessment. A 20 % change in uptake after one cycle of ANG1005 was deemed significant. RESULTS: Thirty-two target and twenty non-target metastatic brain lesions were analyzed. The median tumor reduction by MRI after cycle 1 was -17.5 % (n = 10 patients, lower, upper quartiles: -25.5, -4.8 %) in target lesion size compared with baseline. Fifteen of twenty-nine target lesions (52 %) and 12/20 nontarget lesions (60 %) showed a ≥20 % decrease post-therapy in FLT-PET SUV change (odds ratio 0.71, 95 % CI: 0.19, 2.61). The median percentage change in SUVmax was -20.9 % (n = 29 lesions; lower, upper quartiles: -42.4, 2.0 %), and the median percentage change in SUV80 was also -20.9 % (n = 29; lower, upper quartiles: -49.0, 0.0 %). Two patients had confirmed partial responses by PET and MRI lasting 6 and 18 cycles, respectively. Seven patients had stable disease, receiving a median of six cycles. CONCLUSIONS: ANG1005 warrants further study in BCBM. Results demonstrated a moderately strong association between MRI and 18F-FLT-PET imaging.


Asunto(s)
Antineoplásicos/uso terapéutico , Neoplasias Encefálicas/tratamiento farmacológico , Neoplasias Encefálicas/secundario , Neoplasias de la Mama/patología , Paclitaxel/análogos & derivados , Péptidos/uso terapéutico , Adulto , Antineoplásicos/administración & dosificación , Antineoplásicos/efectos adversos , Biomarcadores , Biomarcadores de Tumor , Neoplasias Encefálicas/diagnóstico , Neoplasias de la Mama/diagnóstico , Neoplasias de la Mama/metabolismo , Terapia Combinada , Femenino , Fluorodesoxiglucosa F18 , Humanos , Inmunohistoquímica , Hibridación Fluorescente in Situ , Imagen por Resonancia Magnética , Persona de Mediana Edad , Paclitaxel/administración & dosificación , Paclitaxel/efectos adversos , Paclitaxel/uso terapéutico , Péptidos/administración & dosificación , Péptidos/efectos adversos , Tomografía de Emisión de Positrones , Resultado del Tratamiento
5.
Int J Cancer ; 139(7): 1648-57, 2016 10 01.
Artículo en Inglés | MEDLINE | ID: mdl-27194579

RESUMEN

The eukaryotic translation initiation factor 4E (eIF4E) is a potent oncogene that is found to be dysregulated in 30% of human cancer, including colorectal carcinogenesis (CRC). ISIS 183750 is a second-generation antisense oligonucleotide (ASO) designed to inhibit the production of the eIF4E protein. In preclinical studies we found that EIF4e ASOs reduced expression of EIF4e mRNA and inhibited proliferation of colorectal carcinoma cells. An additive antiproliferative effect was observed in combination with irinotecan. We then performed a clinical trial evaluating this combination in patients with refractory cancer. No dose-limiting toxicities were seen but based on pharmacokinetic data and tolerability the dose of irinotecan was reduced to 160 mg/m(2) biweekly. Efficacy was evaluated in 15 patients with irinotecan-refractory colorectal cancer. The median time of disease control was 22.1 weeks. After ISIS 183750 treatment, peripheral blood levels of eIF4E mRNA were decreased in 13 of 19 patients. Matched pre- and posttreatment tumor biopsies showed decreased eIF4E mRNA levels in five of nine patients. In tumor tissue, the intracellular and stromal presence of ISIS 183750 was detected by IHC in all biopsied patients. Although there were no objective responses stable disease was seen in seven of 15 (47%) patients who were progressing before study entry, six of whom were stable at the time of the week 16 CT scan. We were also able to confirm through mandatory pre- and posttherapy tumor biopsies penetration of the ASO into the site of metastasis.


Asunto(s)
Camptotecina/análogos & derivados , Neoplasias Colorrectales/terapia , Factor 4E Eucariótico de Iniciación/antagonistas & inhibidores , Oligonucleótidos Antisentido/uso terapéutico , Oligorribonucleótidos/uso terapéutico , Adulto , Anciano , Camptotecina/efectos adversos , Camptotecina/sangre , Camptotecina/uso terapéutico , Línea Celular Tumoral , Neoplasias Colorrectales/tratamiento farmacológico , Neoplasias Colorrectales/genética , Terapia Combinada , Factor 4E Eucariótico de Iniciación/genética , Femenino , Células HCT116 , Humanos , Irinotecán , Masculino , Persona de Mediana Edad , Oligonucleótidos , Oligonucleótidos Antisentido/genética , Oligorribonucleótidos/genética , ARN Mensajero/sangre , ARN Mensajero/genética
6.
Epidemiol Infect ; 144(11): 2345-53, 2016 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-27018820

RESUMEN

Healthcare workers (HCWs) reporting no history of varicella frequently receive varicella vaccination (vOka) if they test varicella-zoster virus (VZV) immunoglobulin G (IgG) negative. In this study, the utilities of VZV-IgG time-resolved fluorescence immunoassay (VZV-TRFIA) and a commercial VZV-IgG purified glycoprotein enzyme immunoassay (gpEIA) currently used in England for confirming VZV immunity have been compared to the fluorescent-antibody-to-membrane-antigen assay (FAMA). A total of 110 HCWs received two doses of vOka vaccine spaced 6 weeks apart and sera collected pre-vaccination (n = 100), at 6 weeks post-completion of vaccination (n = 86) and at 12-18 months follow-up (n = 73) were analysed. Pre-vaccination, by FAMA, 61·0% sera were VZV IgG negative, and compared to FAMA the sensitivities of VZV-TRFIA and gpEIA were 74·4% [95% confidence interval (CI) 57·9-87·0] and 46·2% (95% CI 30·1-62·8), respectively. Post-completion of vaccination the seroconversion rate by FAMA was 93·7% compared to rates of 95·8% and 70·8% determined by VZV-TRFIA and gpEIA, respectively. At 12-18 months follow-up seropositivity rates by FAMA, VZV-TRFIA and gpEIA were 78·1%, 74·0% and 47·9%, respectively. Compared to FAMA the sensitivities of VZV-TRFIA and gpEIA for measuring VZV IgG following vaccination were 96·4% (95% CI 91·7-98·8) and 74·6% (95% CI 66·5-81·6), respectively. Using both FAMA and VZV-TRFIA to identify healthy adult VZV susceptibles and measure seroconversion showed that vOka vaccination of HCWs is highly immunogenic.


Asunto(s)
Anticuerpos Antivirales/sangre , Técnica del Anticuerpo Fluorescente , Fluoroinmunoensayo , Personal de Salud/estadística & datos numéricos , Técnicas para Inmunoenzimas , Inmunoglobulina G/sangre , Adulto , Vacuna contra la Varicela/inmunología , Herpesvirus Humano 3/inmunología , Humanos , Persona de Mediana Edad , Adulto Joven
7.
Mol Psychiatry ; 21(5): 594-600, 2016 May.
Artículo en Inglés | MEDLINE | ID: mdl-26952864

RESUMEN

Using Icelandic whole-genome sequence data and an imputation approach we searched for rare sequence variants in CHRNA4 and tested them for association with nicotine dependence. We show that carriers of a rare missense variant (allele frequency=0.24%) within CHRNA4, encoding an R336C substitution, have greater risk of nicotine addiction than non-carriers as assessed by the Fagerstrom Test for Nicotine Dependence (P=1.2 × 10(-4)). The variant also confers risk of several serious smoking-related diseases previously shown to be associated with the D398N substitution in CHRNA5. We observed odds ratios (ORs) of 1.7-2.3 for lung cancer (LC; P=4.0 × 10(-4)), chronic obstructive pulmonary disease (COPD; P=9.3 × 10(-4)), peripheral artery disease (PAD; P=0.090) and abdominal aortic aneurysms (AAAs; P=0.12), and the variant associates strongly with the early-onset forms of LC (OR=4.49, P=2.2 × 10(-4)), COPD (OR=3.22, P=2.9 × 10(-4)), PAD (OR=3.47, P=9.2 × 10(-3)) and AAA (OR=6.44, P=6.3 × 10(-3)). Joint analysis of the four smoking-related diseases reveals significant association (P=6.8 × 10(-5)), particularly for early-onset cases (P=2.1 × 10(-7)). Our results are in agreement with functional studies showing that the human α4ß2 isoform of the channel containing R336C has less sensitivity for its agonists than the wild-type form following nicotine incubation.


Asunto(s)
Predisposición Genética a la Enfermedad , Mutación Missense , Receptores Nicotínicos/genética , Fumar/genética , Tabaquismo/complicaciones , Tabaquismo/genética , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Aneurisma de la Aorta Abdominal/etiología , Aneurisma de la Aorta Abdominal/genética , Femenino , Estudios de Asociación Genética , Humanos , Islandia , Neoplasias Pulmonares/etiología , Neoplasias Pulmonares/genética , Masculino , Persona de Mediana Edad , Enfermedad Arterial Periférica/etiología , Enfermedad Arterial Periférica/genética , Enfermedad Pulmonar Obstructiva Crónica/etiología , Enfermedad Pulmonar Obstructiva Crónica/genética , Población Blanca/genética , Adulto Joven
8.
Bone Marrow Transplant ; 51(5): 705-12, 2016 May.
Artículo en Inglés | MEDLINE | ID: mdl-26828906

RESUMEN

Although fatigue is common after allogeneic hematopoietic cell transplantation, little is known about fatigue in patients with chronic GvHD (cGvHD). The aim of this study was to explore factors associated with fatigue in cGvHD. Data were drawn from a sequentially recruited, cross-sectional study of adults with moderate or severe cGvHD (n=263). Respondents were classified as fatigued or not fatigued based on their response to a single item regarding loss of energy from the Lee cGvHD Symptom Scale. In univariate analysis, factors significantly associated with fatigue included performance status, number of prior cGvHD therapies, cGvHD symptom bother, self-assessed physical and mental health, nutritional status, walk velocity and self-reported physical activity. There were no significant associations between fatigue and disease-related cGvHD variables. Multivariable logistic regression demonstrated that being less active and having pulmonary and/or muscle/joint symptoms were independently associated with fatigue. In conclusion, clinically significant fatigue was prevalent in more than one-third of subjects with cGvHD, and was disabling. Absence of association with measures of cGvHD severity underscores the need to elucidate the pathogenesis of fatigue and its relationship with inflammatory activity. Pulmonary and muscle/joint symptoms and physical inactivity represent potential targets for intervention in clinical studies.


Asunto(s)
Fatiga/etiología , Enfermedad Injerto contra Huésped/patología , Adolescente , Adulto , Anciano , Artralgia , Enfermedad Crónica , Estudios Transversales , Ejercicio Físico , Femenino , Humanos , Masculino , Persona de Mediana Edad , Análisis Multivariante , Mialgia , Prevalencia , Análisis de Regresión , Adulto Joven
9.
Ann Oncol ; 27(4): 693-9, 2016 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-26802155

RESUMEN

BACKGROUND: KRAS mutations in NSCLC are associated with a lack of response to epidermal growth factor receptor inhibitors. Selumetinib (AZD6244; ARRY-142886) is an oral selective MEK kinase inhibitor of the Ras/Raf/MEK/ERK pathway. PATIENTS AND METHODS: Advanced nonsmall-cell lung cancer (NSCLC) patients failing one to two prior regimens underwent KRAS profiling. KRAS wild-type patients were randomized to erlotinib (150 mg daily) or a combination of selumetinib (150 mg daily) with erlotinib (100 mg daily). KRAS mutant patients were randomized to selumetinib (75 mg b.i.d.) or the combination. The primary end points were progression-free survival (PFS) for the KRAS wild-type cohort and objective response rate (ORR) for the KRAS mutant cohort. Biomarker studies of ERK phosphorylation and immune subsets were carried out. RESULTS: From March 2010 to May 2013, 89 patients were screened; 41 KRAS mutant and 38 KRAS wild-type patients were enrolled. Median PFS in the KRAS wild-type arm was 2.4 months [95% confidence interval (CI) 1.3-3.7] for erlotinib alone and 2.1 months (95% CI 1.8-5.1) for the combination. The ORR in the KRAS mutant group was 0% (95% CI 0.0% to 33.6%) for selumetinib alone and 10% (95% CI 2.1% to 26.3%) for the combination. Combination therapy resulted in increased toxicities, requiring dose reductions (56%) and discontinuation (8%). Programmed cell death-1 expression on regulatory T cells (Tregs), Tim-3 on CD8+ T cells and Th17 levels were associated with PFS and overall survival in patients receiving selumetinib. CONCLUSIONS: This study failed to show improvement in ORR or PFS with combination therapy of selumetinib and erlotinib over monotherapy in KRAS mutant and KRAS wild-type advanced NSCLC. The association of immune subsets and immune checkpoint receptor expression with selumetinib may warrant further studies.


Asunto(s)
Carcinoma de Pulmón de Células no Pequeñas/tratamiento farmacológico , Carcinoma de Pulmón de Células no Pequeñas/genética , Clorhidrato de Erlotinib/administración & dosificación , Proteínas Proto-Oncogénicas p21(ras)/genética , Adulto , Anciano , Anciano de 80 o más Años , Bencimidazoles/administración & dosificación , Carcinoma de Pulmón de Células no Pequeñas/patología , Supervivencia sin Enfermedad , Femenino , Humanos , Quinasa 1 de Quinasa de Quinasa MAP/genética , Masculino , Persona de Mediana Edad , Mutación , Inhibidores de Proteínas Quinasas/administración & dosificación
10.
United European Gastroenterol J ; 3(5): 453-61, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-26535124

RESUMEN

BACKGROUND: Endoglin is an endothelial cell membrane receptor essential for angiogenesis and highly expressed on the vasculature of many tumor types, including hepatocellular carcinoma (HCC). TRC105 is a chimeric IgG1 anti-CD105 monoclonal antibody that inhibits angiogenesis and tumor growth by endothelial cell growth inhibition, ADCC and apoptosis, and complements VEGF inhibitors. OBJECTIVE: The aim of this phase II study was to evaluate the efficacy of anti-endoglin therapy with TRC105 in patients with advanced HCC, post-sorafenib. METHODS: Patients with HCC and compensated liver function (Childs-Pugh A/B7), ECOG 0/1, were enrolled to a single-arm, phase II study of TRC105 15 mg/kg IV every two weeks. Patients must have progressed on or been intolerant of prior sorafenib. A Simon optimal two-stage design was employed with a 50% four-month PFS target for progression to the second stage. Correlative biomarkers evaluated included DCE-MRI as well as plasma levels of angiogenic biomarkers and soluble CD105. RESULTS: A total accrual of 27 patients was planned. However, because of lack of efficacy and in accordance with the Simon two-stage design, 11 patients were enrolled. There were no grade 3/4 treatment-related toxicities. Most frequent toxicities were headache (G2; N = 3) and epistaxis (G1; N = 4). One patient had a confirmed partial response by standard RECIST criteria and biologic response on DCE-MRI but the four-month PFS was insufficient to proceed to the second stage of the study. CONCLUSIONS: TRC105 was well tolerated in this HCC population following sorafenib. Although there was evidence of clinical activity, this did not meet prespecified criteria to proceed to the second stage. TRC105 development in HCC continues as combination therapy with sorafenib.

11.
Transl Psychiatry ; 5: e651, 2015 Oct 06.
Artículo en Inglés | MEDLINE | ID: mdl-26440539

RESUMEN

We conducted a 1000 Genomes-imputed genome-wide association study (GWAS) meta-analysis for nicotine dependence, defined by the Fagerström Test for Nicotine Dependence in 17 074 ever smokers from five European-ancestry samples. We followed up novel variants in 7469 ever smokers from five independent European-ancestry samples. We identified genome-wide significant association in the alpha-4 nicotinic receptor subunit (CHRNA4) gene on chromosome 20q13: lowest P=8.0 × 10(-9) across all the samples for rs2273500-C (frequency=0.15; odds ratio=1.12 and 95% confidence interval=1.08-1.17 for severe vs mild dependence). rs2273500-C, a splice site acceptor variant resulting in an alternate CHRNA4 transcript predicted to be targeted for nonsense-mediated decay, was associated with decreased CHRNA4 expression in physiologically normal human brains (lowest P=7.3 × 10(-4)). Importantly, rs2273500-C was associated with increased lung cancer risk (N=28 998, odds ratio=1.06 and 95% confidence interval=1.00-1.12), likely through its effect on smoking, as rs2273500-C was no longer associated with lung cancer after adjustment for smoking. Using criteria for smoking behavior that encompass more than the single 'cigarettes per day' item, we identified a common CHRNA4 variant with important regulatory properties that contributes to nicotine dependence and smoking-related consequences.


Asunto(s)
Receptores Nicotínicos/genética , Tabaquismo/genética , Femenino , Predisposición Genética a la Enfermedad , Estudio de Asociación del Genoma Completo , Humanos , Masculino , Polimorfismo de Nucleótido Simple , Sitios de Empalme de ARN , Población Blanca/genética
12.
J Dent Res ; 94(4): 547-54, 2015 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-25740857

RESUMEN

At least half of patients with chronic graft-versus-host-disease (cGVHD), the leading cause of morbidity and non-relapse mortality after allogeneic stem cell transplantation, have oral manifestations: mucosal lesions, salivary dysfunction, and limited mouth-opening. cGVHD may manifest in a single organ or affect multiple organ systems, including the mouth, eyes, and the skin. The interrelationship of the 3 oral manifestations of cGVHD with each other and with the specific manifestations of extraoral cGVHD has not been studied. In this analysis, we explored, in a large group of patients with cGVHD, the potential associations between: (1) oral mucosal disease and erythematous skin disease, (2) salivary gland dysfunction and lacrimal gland dysfunction, and (3) limited mouth-opening and sclerotic skin cGVHD. Study participants, enrolled in a cGVHD Natural History Protocol (NCT00331968, n = 212), underwent an oral examination evaluating: (1) mucosal cGVHD [NIH Oral Mucosal Score (OMS)], (2) salivary dysfunction (saliva flow and xerostomia), and (3) maximum mouth-opening measurement. Parameters for dysfunction (OMS > 2, saliva flow ≤ 1 mL/5 min, mouth-opening ≤ 35 mm) were analyzed for association with skin cGVHD involvement (erythema and sclerosis, skin symptoms), lacrimal dysfunction (Schirmer's tear test, xerophthalmia), Lee cGVHD Symptom Scores, and NIH organ scores. Oral mucosal disease (31% prevalence) was associated with skin erythema (P < 0.001); salivary dysfunction (11% prevalence) was associated with lacrimal dysfunction (P = 0.010) and xerostomia with xerophthalmia (r = 0.32, P = 0.001); and limited mouth-opening (17% prevalence) was associated with skin sclerosis (P = 0.008) and skin symptoms (P = 0.001). There was no association found among these 3 oral cGVHD manifestations. This analysis supports the understanding of oral cGVHD as 3 distinct diseases: mucosal lesions, salivary gland dysfunction, and mouth sclerosis. Clear classification of oral cGVHD as 3 separate manifestations will improve clinical diagnosis, observational research data collection, and the definitions of outcome measures in clinical trials.


Asunto(s)
Enfermedad Injerto contra Huésped/complicaciones , Enfermedades de la Boca/etiología , Adolescente , Adulto , Anciano , Superficie Corporal , Enfermedad Crónica , Estudios Transversales , Eritema/etiología , Femenino , Humanos , Enfermedades del Aparato Lagrimal/etiología , Masculino , Persona de Mediana Edad , Boca/patología , Mucosa Bucal/patología , Dolor/etiología , Saliva/metabolismo , Enfermedades de las Glándulas Salivales/etiología , Esclerosis , Tasa de Secreción/fisiología , Piel/patología , Xeroftalmia/etiología , Xerostomía/etiología , Adulto Joven
15.
Oncogene ; 34(44): 5548-59, 2015 Oct 29.
Artículo en Inglés | MEDLINE | ID: mdl-25703328

RESUMEN

Although microRNAs (miRs) have been implicated in the pathogenesis of various human malignancies, limited information is available regarding mechanisms by which these noncoding RNAs contribute to initiation and progression of tobacco-induced esophageal cancers. In this study, array and quantitative reverse transcriptase-PCR techniques were used to examine miR expression in immortalized esophageal epithelia (IEE) and esophageal adenocarcinoma (EAC) cells cultured in normal media with or without cigarette smoke condensate (CSC). Under relevant exposure conditions, CSC significantly decreased miR-217 expression in these cells. Endogenous levels of miR-217 expression in cultured EAC cells (EACC)/primary EACs were significantly lower than those observed in IEE/ paired normal esophageal tissues. RNA crosslink immunoprecipitation, quantitative reverse transcriptase-PCR (qRT-PCR) and immunoblot experiments demonstrated direct interaction of miR-217 with kallikrein 7 (KLK7), encoding a putative oncogene not previously implicated in EAC. Repression of miR-217 correlated with increased levels of KLK7 in primary EACs, particularly those from smokers. Chromatin and methylated DNA immunoprecipitation experiments demonstrated that CSC-mediated repression of miR-217 coincided with DNMT3b-dependent hypermethylation and decreased occupancy of nuclear factor 1 within the miR-217 genomic locus. Deoxyazacytidine induced miR-217 expression and downregulated KLK7 in EACC; deoxyazacytidine also attenuated CSC-mediated miR-217 repression and upregulation of KLK7 in IEE and EACC. Overexpression of miR-217 significantly decreased, whereas overexpression of KLK7 increased proliferation, invasion and tumorigenicity of EACC. Collectively, these data demonstrate that epigenetic repression of miR-217 contributes to the pathogenesis of EAC via upregulation of KLK7 and suggest that restoration of miR-217 expression may be a novel treatment strategy for these malignancies.


Asunto(s)
Adenocarcinoma/genética , Carcinogénesis/genética , Represión Epigenética/genética , Neoplasias Esofágicas/genética , MicroARNs/genética , Nicotiana/efectos adversos , Fumar/genética , Adenocarcinoma/patología , Carcinogénesis/patología , Línea Celular Tumoral , Proliferación Celular/genética , Cromatina/genética , Metilación de ADN/genética , Regulación hacia Abajo/genética , Neoplasias Esofágicas/patología , Regulación Neoplásica de la Expresión Génica/genética , Humanos , Calicreínas/genética , Factores de Transcripción NFI/genética , Invasividad Neoplásica/genética , Humo/efectos adversos , Regulación hacia Arriba/genética
16.
Clin Genet ; 87(2): 141-7, 2015 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-24597975

RESUMEN

The BCAP31 gene is located between SLC6A8, associated with X-linked creatine transporter deficiency, and ABCD1, associated with X-linked adrenoleukodystrophy. Recently, loss-of-function mutations in BCAP31 were reported in association with severe developmental delay, deafness and dystonia. We characterized the break points in eight patients with deletions of SLC6A8, BCAP31 and/or ABCD1 and studied the genotype-phenotype correlations. The phenotype in patients with contiguous gene deletions involving BCAP31 overlaps with the phenotype of isolated BCAP31 deficiency. Only deletions involving both BCAP31 and ABCD1 were associated with hepatic cholestasis and death before 1 year, which might be explained by a synergistic effect. Remarkably, a patient with an isolated deletion at the 3'-end of SLC6A8 had a similar severe phenotype as seen in BCAP31 deficiency but without deafness. This might be caused by the disturbance of a regulatory element between SLC6A8 and BCAP31.


Asunto(s)
Transportadoras de Casetes de Unión a ATP/genética , Colestasis Intrahepática/genética , Discapacidad Intelectual/genética , Proteínas de la Membrana/genética , Proteínas del Tejido Nervioso/genética , Proteínas de Transporte de Neurotransmisores en la Membrana Plasmática/genética , Miembro 1 de la Subfamilia D de Transportador de Casetes de Unión al ATP , Adrenoleucodistrofia/genética , Adrenoleucodistrofia/mortalidad , Adrenoleucodistrofia/patología , Adulto , Encefalopatías Metabólicas Innatas/genética , Encefalopatías Metabólicas Innatas/mortalidad , Encefalopatías Metabólicas Innatas/patología , Niño , Preescolar , Colestasis Intrahepática/mortalidad , Colestasis Intrahepática/patología , Creatina/deficiencia , Creatina/genética , Eliminación de Gen , Estudios de Asociación Genética , Humanos , Lactante , Recién Nacido , Discapacidad Intelectual/mortalidad , Discapacidad Intelectual/patología , Masculino , Discapacidad Intelectual Ligada al Cromosoma X/genética , Discapacidad Intelectual Ligada al Cromosoma X/mortalidad , Discapacidad Intelectual Ligada al Cromosoma X/patología , Fenotipo , Proteínas de Transporte de Neurotransmisores en la Membrana Plasmática/deficiencia
17.
J Postgrad Med ; 60(4): 366-71, 2014.
Artículo en Inglés | MEDLINE | ID: mdl-25370543

RESUMEN

BACKGROUND: Recent review of older (≥45-years-old) patients admitted to our trauma center showed that more than one-third were using neuro-psychiatric medications (NPMs) prior to their injury-related admission. Previously published data suggests that use of NPMs may increase patients' risk and severity of injury. We sought to examine the impact of pre-injury NPM use on older trauma patients' morbidity and mortality. MATERIALS AND METHODS: Retrospective record review included medication regimen characteristics and NPM use (antidepressants-AD, antipsychotics-AP, anxiolytics-AA). Hospital morbidity, mortality, and 90-day survival were examined. Comparisons included regimens involving NPMs, further focusing on their interactions with various cardiac medications (beta blocker - BB; angiotensin-converting enzyme inhibitor/angiotensin receptor blocker - ACE/ARB; calcium channel blocker - CCB). RESULTS: 712 patient records were reviewed (399 males, mean age 63.5 years, median ISS 8). 245 patients were taking at least 1 NPM: AD (158), AP (35), or AA (108) before injury. There was no effect of NPM monotherapy on hospital mortality. Patients taking ≥3 NPMs had significantly lower 90-day survival compared to patients taking ≤2 NPMs (81% for 3 or more NPMs, 95% for no NPMs, and 89% 1-2 NPMs, P < 0.01). Several AD-cardiac medication (CM) combinations were associated with increased mortality compared to monotherapy with either agent (BB-AD 14.7% mortality versus 7.0% for AD monotherapy or 4.8% BB monotherapy, P < 0.05). Combinations of ACE/ARB-AA were associated with increased mortality compared to ACE/ARB monotherapy (11.5% vs 4.9, P = 0.04). Finally, ACE/ARB-AD co-administration had higher mortality than ACE/ARB monotherapy (13.5% vs 4.9%, P = 0.01). CONCLUSIONS: Large proportion of older trauma patients was using pre-injury NPMs. Several regimens involving NPMs and CMs were associated with increased in-hospital mortality. Additionally, use of ≥3 NPMs was associated with lower 90-day survival.


Asunto(s)
Antagonistas Adrenérgicos beta/uso terapéutico , Inhibidores de la Enzima Convertidora de Angiotensina/uso terapéutico , Mortalidad Hospitalaria , Hipertensión/tratamiento farmacológico , Trastornos Mentales/tratamiento farmacológico , Polifarmacia , Heridas y Lesiones/complicaciones , Antagonistas Adrenérgicos beta/efectos adversos , Anciano , Anciano de 80 o más Años , Inhibidores de la Enzima Convertidora de Angiotensina/efectos adversos , Quimioterapia Combinada , Femenino , Humanos , Hipertensión/mortalidad , Puntaje de Gravedad del Traumatismo , Masculino , Trastornos Mentales/mortalidad , Persona de Mediana Edad , Estudios Retrospectivos , Heridas y Lesiones/epidemiología
18.
Bone Marrow Transplant ; 49(12): 1513-20, 2014 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-25153693

RESUMEN

Lack of standardized criteria measuring therapeutic response remains an obstacle to the development of better treatments for chronic GVHD (cGVHD). This cross-sectional prospective study examined the concurrent and predictive validity of 18 clinician-reported ('Form A') and 8 patient-reported ('Form B') response measures proposed by NIH criteria. Concurrent parameters of interest were NIH global score, cGVHD activity, Lee symptom score and SF36 PCS. Patient cohort included 193 adults with moderate-to-severe cGVHD. Measures associated with the highest number of outcomes were lung function score (LFS), 2-min walk, grip strength, 4-point health-care provider (HCP) and patient global scores, 11-point clinician- and patient-reported global symptom severity scores, and Karnofsky performance score (KPS). Measures associated with survival in univariate analyses led to a Cox model containing skin erythema, LFS, KPS, eosinophil count and interval from cGVHD diagnosis to enrollment as jointly associated with survival. In conclusion, 4-point HCP and patient global scores and 11-point clinician- and patient-reported global symptom severity scores are associated with the majority of concurrent outcomes. Skin erythema is a potentially reversible sign of cGVHD that is associated with survival. These results define a subset of measures that should be prioritized for evaluation in future studies.


Asunto(s)
Enfermedad Injerto contra Huésped/inmunología , Neoplasias Hematológicas/terapia , Evaluación de Resultado en la Atención de Salud , Acondicionamiento Pretrasplante/métodos , Adolescente , Adulto , Anciano , Estudios Transversales , Femenino , Trasplante de Células Madre Hematopoyéticas , Humanos , Estado de Ejecución de Karnofsky , Masculino , Persona de Mediana Edad , National Institutes of Health (U.S.) , Valor Predictivo de las Pruebas , Modelos de Riesgos Proporcionales , Estudios Prospectivos , Pruebas de Función Respiratoria , Acondicionamiento Pretrasplante/normas , Resultado del Tratamiento , Estados Unidos , Adulto Joven
19.
Bull Entomol Res ; 104(6): 681-8, 2014 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-25062354

RESUMEN

Nesidiocoris tenuis (Reuter) (Heteroptera: Miridae) is an omnivorous insect used for biological control. Augmentative release and conservation of N. tenuis have been used for pest control in tomato crops. Intracellular bacterial symbionts of arthropods are common in nature and have diverse effects on their hosts; in some cases they can dramatically affect biological control. Fingerprinting methods showed that the symbiotic complex associated with N. tenuis includes Wolbachia and Rickettsia. Rickettsia of N. tenuis was further characterized by sequencing the 16S rRNA and gltA bacterial genes, measuring its amount in different developmental stages of the insect by real-time polymerase chain reaction, and localizing the bacteria in the insect's body by fluorescence in situ hybridization. The Rickettsia in N. tenuis exhibited 99 and 96% similarity of both sequenced genes to Rickettsia bellii and Rickettsia reported from Bemisia tabaci, respectively. The highest amount of Rickettsia was measured in the 5th instar and adult, and the symbionts could be detected in the host gut and ovaries. Although the role played by Rickettsia in the biology of N. tenuis is currently unknown, their high amount in the adults and localization in the gut suggest that they may have a nutritional role in this insect.


Asunto(s)
Proteínas Bacterianas/genética , Heterópteros/microbiología , Rickettsia/fisiología , Simbiosis , Animales , Proteínas Bacterianas/metabolismo , Femenino , Hibridación Fluorescente in Situ , Masculino , Datos de Secuencia Molecular , ARN Ribosómico 16S , Reacción en Cadena en Tiempo Real de la Polimerasa , Rickettsia/genética , Rickettsia/metabolismo , Análisis de Secuencia de ADN
20.
Bone Marrow Transplant ; 49(10): 1300-6, 2014 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-25029231

RESUMEN

Malnutrition is a known complication of chronic GVHD (cGVHD), but has not been well described in the context of organ-specific manifestations and the recent National Institutes of Health (NIH) criteria. Here, 210 cGVHD patients were analyzed, in a cross-sectional study design, for demographics, transplant-related history, clinical assessments, symptoms, function, quality-of-life, laboratory values and survival in order to determine their associations with nutritional status. Most patients had long-standing, moderate or severe cGVHD and had failed many lines of therapy. Twenty-nine percent (60/210) of subjects were malnourished, using the subjective Patient-Generated Subjective Global Assessment (PG-SGA) questionnaire and evaluation. No demographic or transplant characteristics were associated with malnutrition; cGVHD of the lungs, gastrointestinal (GI) tract and mouth, NIH global score, cGVHD symptoms, worse functioning, low albumin, poorer survival and low BMI were associated with malnutrition. A predictive model was developed from all variables of significance: cGVHD of the lungs, GI tract, mouth and BMI accurately predicted 84.2% of malnourished patients as well as 87.2% of well-nourished patients. The PG-SGA questionnaire may be a useful tool in diagnosing nutritional deficits in cGVHD patients undergoing one-time evaluations. Longitudinal prospective studies should assess the utility of nutritional support interventions in cGVHD.


Asunto(s)
Enfermedad Injerto contra Huésped/complicaciones , Desnutrición/etiología , Adolescente , Adulto , Anciano , Femenino , Enfermedad Injerto contra Huésped/mortalidad , Humanos , Masculino , Persona de Mediana Edad , Calidad de Vida , Índice de Severidad de la Enfermedad , Adulto Joven
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