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

RESUMO

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.


Assuntos
Anodontia/genética , Anodontia/epidemiologia , Anodontia/etiologia , Feminino , Estudo de Associação Genômica Ampla , Humanos , Islândia/epidemiologia , Masculino , Polimorfismo de Nucleotídeo Único/genética , Fatores de Risco
3.
Transl Psychiatry ; 7(4): e1109, 2017 04 25.
Artigo em Inglês | MEDLINE | ID: mdl-28440815

RESUMO

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.


Assuntos
Cognição/fisiologia , Variações do Número de Cópias de DNA/genética , Discalculia/genética , Dislexia/genética , Deficiência Intelectual/genética , Adolescente , Adulto , Idoso , Aberrações Cromossômicas , Deleção Cromossômica , Cromossomos Humanos Par 15/genética , Deficiências do Desenvolvimento/genética , Feminino , Neuroimagem Funcional/métodos , Neuroimagem Funcional/normas , Heterozigoto , Humanos , Islândia/epidemiologia , Imageamento por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade , Testes Neuropsicológicos/normas , Fenótipo , Lobo Temporal/anatomia & histologia , Lobo Temporal/diagnóstico por imagem , Adulto Jovem
4.
Breast Cancer Res Treat ; 160(1): 51-59, 2016 11.
Artigo em Inglês | MEDLINE | ID: mdl-27620882

RESUMO

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.


Assuntos
Antineoplásicos/uso terapêutico , Neoplasias Encefálicas/tratamento farmacológico , Neoplasias Encefálicas/secundário , Neoplasias da Mama/patologia , Paclitaxel/análogos & derivados , Peptídeos/uso terapêutico , Adulto , Antineoplásicos/administração & dosagem , Antineoplásicos/efeitos adversos , Biomarcadores , Biomarcadores Tumorais , Neoplasias Encefálicas/diagnóstico , Neoplasias da Mama/diagnóstico , Neoplasias da Mama/metabolismo , Terapia Combinada , Feminino , Fluordesoxiglucose F18 , Humanos , Imuno-Histoquímica , Hibridização in Situ Fluorescente , Imageamento por Ressonância Magnética , Pessoa de Meia-Idade , Paclitaxel/administração & dosagem , Paclitaxel/efeitos adversos , Paclitaxel/uso terapêutico , Peptídeos/administração & dosagem , Peptídeos/efeitos adversos , Tomografia por Emissão de Pósitrons , Resultado do Tratamento
5.
Int J Cancer ; 139(7): 1648-57, 2016 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-27194579

RESUMO

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.


Assuntos
Camptotecina/análogos & derivados , Neoplasias Colorretais/terapia , Fator de Iniciação 4E em Eucariotos/antagonistas & inibidores , Oligonucleotídeos Antissenso/uso terapêutico , Oligorribonucleotídeos/uso terapêutico , Adulto , Idoso , Camptotecina/efeitos adversos , Camptotecina/sangue , Camptotecina/uso terapêutico , Linhagem Celular Tumoral , Neoplasias Colorretais/tratamento farmacológico , Neoplasias Colorretais/genética , Terapia Combinada , Fator de Iniciação 4E em Eucariotos/genética , Feminino , Células HCT116 , Humanos , Irinotecano , Masculino , Pessoa de Meia-Idade , Oligonucleotídeos , Oligonucleotídeos Antissenso/genética , Oligorribonucleotídeos/genética , RNA Mensageiro/sangue , RNA Mensageiro/genética
6.
Epidemiol Infect ; 144(11): 2345-53, 2016 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-27018820

RESUMO

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.


Assuntos
Anticorpos Antivirais/sangue , Imunofluorescência , Fluorimunoensaio , Pessoal de Saúde/estatística & dados numéricos , Técnicas Imunoenzimáticas , Imunoglobulina G/sangue , Adulto , Vacina contra Varicela/imunologia , Herpesvirus Humano 3/imunologia , Humanos , Pessoa de Meia-Idade , Adulto Jovem
7.
Mol Psychiatry ; 21(5): 594-600, 2016 May.
Artigo em Inglês | MEDLINE | ID: mdl-26952864

RESUMO

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.


Assuntos
Predisposição Genética para Doença , Mutação de Sentido Incorreto , Receptores Nicotínicos/genética , Fumar/genética , Tabagismo/complicações , Tabagismo/genética , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Aneurisma da Aorta Abdominal/etiologia , Aneurisma da Aorta Abdominal/genética , Feminino , Estudos de Associação Genética , Humanos , Islândia , Neoplasias Pulmonares/etiologia , Neoplasias Pulmonares/genética , Masculino , Pessoa de Meia-Idade , Doença Arterial Periférica/etiologia , Doença Arterial Periférica/genética , Doença Pulmonar Obstrutiva Crônica/etiologia , Doença Pulmonar Obstrutiva Crônica/genética , População Branca/genética , Adulto Jovem
8.
Bone Marrow Transplant ; 51(5): 705-12, 2016 May.
Artigo em Inglês | MEDLINE | ID: mdl-26828906

RESUMO

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.


Assuntos
Fadiga/etiologia , Doença Enxerto-Hospedeiro/patologia , Adolescente , Adulto , Idoso , Artralgia , Doença Crônica , Estudos Transversais , Exercício Físico , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Mialgia , Prevalência , Análise de Regressão , Adulto Jovem
9.
Ann Oncol ; 27(4): 693-9, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26802155

RESUMO

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.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Carcinoma Pulmonar de Células não Pequenas/genética , Cloridrato de Erlotinib/administração & dosagem , Proteínas Proto-Oncogênicas p21(ras)/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Benzimidazóis/administração & dosagem , Carcinoma Pulmonar de Células não Pequenas/patologia , Intervalo Livre de Doença , Feminino , Humanos , MAP Quinase Quinase Quinase 1/genética , Masculino , Pessoa de Meia-Idade , Mutação , Inibidores de Proteínas Quinases/administração & dosagem
10.
United European Gastroenterol J ; 3(5): 453-61, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26535124

RESUMO

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.
Artigo em Inglês | MEDLINE | ID: mdl-26440539

RESUMO

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.


Assuntos
Receptores Nicotínicos/genética , Tabagismo/genética , Feminino , Predisposição Genética para Doença , Estudo de Associação Genômica Ampla , Humanos , Masculino , Polimorfismo de Nucleotídeo Único , Sítios de Splice de RNA , População Branca/genética
12.
J Dent Res ; 94(4): 547-54, 2015 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-25740857

RESUMO

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.


Assuntos
Doença Enxerto-Hospedeiro/complicações , Doenças da Boca/etiologia , Adolescente , Adulto , Idoso , Superfície Corporal , Doença Crônica , Estudos Transversais , Eritema/etiologia , Feminino , Humanos , Doenças do Aparelho Lacrimal/etiologia , Masculino , Pessoa de Meia-Idade , Boca/patologia , Mucosa Bucal/patologia , Dor/etiologia , Saliva/metabolismo , Doenças das Glândulas Salivares/etiologia , Esclerose , Taxa Secretória/fisiologia , Pele/patologia , Xeroftalmia/etiologia , Xerostomia/etiologia , Adulto Jovem
15.
Oncogene ; 34(44): 5548-59, 2015 Oct 29.
Artigo em Inglês | MEDLINE | ID: mdl-25703328

RESUMO

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.


Assuntos
Adenocarcinoma/genética , Carcinogênese/genética , Repressão Epigenética/genética , Neoplasias Esofágicas/genética , MicroRNAs/genética , Nicotiana/efeitos adversos , Fumar/genética , Adenocarcinoma/patologia , Carcinogênese/patologia , Linhagem Celular Tumoral , Proliferação de Células/genética , Cromatina/genética , Metilação de DNA/genética , Regulação para Baixo/genética , Neoplasias Esofágicas/patologia , Regulação Neoplásica da Expressão Gênica/genética , Humanos , Calicreínas/genética , Fatores de Transcrição NFI/genética , Invasividade Neoplásica/genética , Fumaça/efeitos adversos , Regulação para Cima/genética
16.
Clin Genet ; 87(2): 141-7, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24597975

RESUMO

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.


Assuntos
Transportadores de Cassetes de Ligação de ATP/genética , Colestase Intra-Hepática/genética , Deficiência Intelectual/genética , Proteínas de Membrana/genética , Proteínas do Tecido Nervoso/genética , Proteínas da Membrana Plasmática de Transporte de Neurotransmissores/genética , Membro 1 da Subfamília D de Transportadores de Cassetes de Ligação de ATP , Adrenoleucodistrofia/genética , Adrenoleucodistrofia/mortalidade , Adrenoleucodistrofia/patologia , Adulto , Encefalopatias Metabólicas Congênitas/genética , Encefalopatias Metabólicas Congênitas/mortalidade , Encefalopatias Metabólicas Congênitas/patologia , Criança , Pré-Escolar , Colestase Intra-Hepática/mortalidade , Colestase Intra-Hepática/patologia , Creatina/deficiência , Creatina/genética , Deleção de Genes , Estudos de Associação Genética , Humanos , Lactente , Recém-Nascido , Deficiência Intelectual/mortalidade , Deficiência Intelectual/patologia , Masculino , Deficiência Intelectual Ligada ao Cromossomo X/genética , Deficiência Intelectual Ligada ao Cromossomo X/mortalidade , Deficiência Intelectual Ligada ao Cromossomo X/patologia , Fenótipo , Proteínas da Membrana Plasmática de Transporte de Neurotransmissores/deficiência
17.
J Postgrad Med ; 60(4): 366-71, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25370543

RESUMO

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.


Assuntos
Antagonistas Adrenérgicos beta/uso terapêutico , Inibidores da Enzima Conversora de Angiotensina/uso terapêutico , Mortalidade Hospitalar , Hipertensão/tratamento farmacológico , Transtornos Mentais/tratamento farmacológico , Polimedicação , Ferimentos e Lesões/complicações , Antagonistas Adrenérgicos beta/efeitos adversos , Idoso , Idoso de 80 Anos ou mais , Inibidores da Enzima Conversora de Angiotensina/efeitos adversos , Quimioterapia Combinada , Feminino , Humanos , Hipertensão/mortalidade , Escala de Gravidade do Ferimento , Masculino , Transtornos Mentais/mortalidade , Pessoa de Meia-Idade , Estudos Retrospectivos , Ferimentos e Lesões/epidemiologia
18.
Bone Marrow Transplant ; 49(12): 1513-20, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25153693

RESUMO

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.


Assuntos
Doença Enxerto-Hospedeiro/imunologia , Neoplasias Hematológicas/terapia , Avaliação de Resultados em Cuidados de Saúde , Condicionamento Pré-Transplante/métodos , Adolescente , Adulto , Idoso , Estudos Transversais , Feminino , Transplante de Células-Tronco Hematopoéticas , Humanos , Avaliação de Estado de Karnofsky , Masculino , Pessoa de Meia-Idade , National Institutes of Health (U.S.) , Valor Preditivo dos Testes , Modelos de Riscos Proporcionais , Estudos Prospectivos , Testes de Função Respiratória , Condicionamento Pré-Transplante/normas , Resultado do Tratamento , Estados Unidos , Adulto Jovem
19.
Bull Entomol Res ; 104(6): 681-8, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25062354

RESUMO

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.


Assuntos
Proteínas de Bactérias/genética , Heterópteros/microbiologia , Rickettsia/fisiologia , Simbiose , Animais , Proteínas de Bactérias/metabolismo , Feminino , Hibridização in Situ Fluorescente , Masculino , Dados de Sequência Molecular , RNA Ribossômico 16S , Reação em Cadeia da Polimerase em Tempo Real , Rickettsia/genética , Rickettsia/metabolismo , Análise de Sequência de DNA
20.
Bone Marrow Transplant ; 49(10): 1300-6, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25029231

RESUMO

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.


Assuntos
Doença Enxerto-Hospedeiro/complicações , Desnutrição/etiologia , Adolescente , Adulto , Idoso , Feminino , Doença Enxerto-Hospedeiro/mortalidade , Humanos , Masculino , Pessoa de Meia-Idade , Qualidade de Vida , Índice de Gravidade de Doença , Adulto Jovem
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