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1.
Crit Care ; 27(1): 417, 2023 10 31.
Artículo en Inglés | MEDLINE | ID: mdl-37907989

RESUMEN

BACKGROUND: Sepsis is one of the leading causes of death. Treatment attempts targeting the immune response regularly fail in clinical trials. As HCMV latency can modulate the immune response and changes the immune cell composition, we hypothesized that HCMV serostatus affects mortality in sepsis patients. METHODS: We determined the HCMV serostatus (i.e., latency) of 410 prospectively enrolled patients of the multicenter SepsisDataNet.NRW study. Patients were recruited according to the SEPSIS-3 criteria and clinical data were recorded in an observational approach. We quantified 13 cytokines at Days 1, 4, and 8 after enrollment. Proteomics data were analyzed from the plasma samples of 171 patients. RESULTS: The 30-day mortality was higher in HCMV-seropositive patients than in seronegative sepsis patients (38% vs. 25%, respectively; p = 0.008; HR, 1.656; 95% CI 1.135-2.417). This effect was observed independent of age (p = 0.010; HR, 1.673; 95% CI 1.131-2.477). The predictive value on the outcome of the increased concentrations of IL-6 was present only in the seropositive cohort (30-day mortality, 63% vs. 24%; HR 3.250; 95% CI 2.075-5.090; p < 0.001) with no significant differences in serum concentrations of IL-6 between the two groups. Procalcitonin and IL-10 exhibited the same behavior and were predictive of the outcome only in HCMV-seropositive patients. CONCLUSION: We suggest that the predictive value of inflammation-associated biomarkers should be re-evaluated with regard to the HCMV serostatus. Targeting HCMV latency might open a new approach to selecting suitable patients for individualized treatment in sepsis.


Asunto(s)
Infecciones por Citomegalovirus , Sepsis , Humanos , Citomegalovirus , Infecciones por Citomegalovirus/complicaciones , Inmunidad , Interleucina-6 , Sepsis/complicaciones
2.
Phys Rev Lett ; 129(19): 193604, 2022 Nov 04.
Artículo en Inglés | MEDLINE | ID: mdl-36399754

RESUMEN

Entangled photon pairs are key to many novel applications in quantum technologies. Semiconductor quantum dots can be used as sources of on-demand, highly entangled photons. The fidelity to a fixed maximally entangled state is limited by the excitonic fine-structure splitting. This work demonstrates that, even if this splitting is absent, the degree of entanglement cannot reach unity when the excitation pulse in a two-photon resonance scheme has a finite duration. The degradation of the entanglement has its origin in a dynamically induced splitting of the exciton states caused by the laser pulse itself. Hence, in the setting explored here, the excitation process limits the achievable concurrence for entangled photons generated in an optically excited four-level quantum emitter.

3.
Psychol Med ; 47(6): 1097-1106, 2017 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-27976600

RESUMEN

BACKGROUND: The purpose of this study was to evaluate a programme of lesion surgery carried out on patients with treatment-resistant depression (TRD). METHOD: This was a retrospective study looking at clinical and psychometric data from 45 patients with TRD who had undergone bilateral stereotactic anterior capsulotomy surgery over a period of 15 years, with the approval of the Mental Health Act Commission (37 with unipolar depression and eight with bipolar disorder). The Beck Depression Inventory (BDI) before and after surgery was used as the primary outcome measure. The Montgomery-Asberg Depression Rating Scale was administered and cognitive aspects of executive and memory functions were also examined. We carried out a paired-samples t test on the outcome measures to determine any statistically significant change in the group as a consequence of surgery. RESULTS: Patients improved on the clinical measure of depression after surgery by -21.20 points on the BDI with a 52% change. There were no significant cognitive changes post-surgery. Six patients were followed up in 2013 by phone interview and reported a generally positive experience. No major surgical complications occurred. CONCLUSIONS: With the limitations of an uncontrolled, observational study, our data suggest that capsulotomy can be an effective treatment for otherwise TRD. Performance on neuropsychological tests did not deteriorate.


Asunto(s)
Trastorno Depresivo Resistente al Tratamiento/cirugía , Cápsula Interna/cirugía , Neuronavegación/métodos , Evaluación de Resultado en la Atención de Salud/métodos , Adulto , Trastorno Depresivo Resistente al Tratamiento/diagnóstico por imagen , Trastorno Depresivo Resistente al Tratamiento/fisiopatología , Femenino , Estudios de Seguimiento , Humanos , Cápsula Interna/diagnóstico por imagen , Masculino , Persona de Mediana Edad , Estudios Retrospectivos
4.
Cereb Cortex ; 26(10): 3921-3927, 2016 10.
Artículo en Inglés | MEDLINE | ID: mdl-27473322

RESUMEN

Human values are abstract ideals that motivate behavior. The motivational nature of human values raises the possibility that they might be underpinned by brain structures that are particularly involved in motivated behavior and reward processing. We hypothesized that variation in subcortical hubs of the reward system and their main connecting pathway, the superolateral medial forebrain bundle (slMFB) is associated with individual value orientation. We conducted Pearson's correlation between the scores of 10 human values and the volumes of 14 subcortical structures and microstructural properties of the medial forebrain bundle in a sample of 87 participants, correcting for multiple comparisons (i.e.,190). We found a positive association between the value that people attach to hedonism and the volume of the left globus pallidus (GP).We then tested whether microstructural parameters (i.e., fractional anisotropy and myelin volume fraction) of the slMFB, which connects with the GP, are also associated to hedonism and found a significant, albeit in an uncorrected level, positive association between the myelin volume fraction within the left slMFB and hedonism scores. This is the first study to elucidate the relationship between the importance people attach to the human value of hedonism and structural variation in reward-related subcortical brain regions.


Asunto(s)
Globo Pálido/diagnóstico por imagen , Haz Prosencefálico Medial/diagnóstico por imagen , Recompensa , Adulto , Femenino , Lateralidad Funcional , Humanos , Imagen por Resonancia Magnética , Masculino , Motivación , Vaina de Mielina , Tamaño de los Órganos , Pruebas Psicológicas , Adulto Joven
5.
J Viral Hepat ; 23(5): 375-86, 2016 May.
Artículo en Inglés | MEDLINE | ID: mdl-26833585

RESUMEN

The interferon-stimulated gene 15 (ISG15) plays an important role in the pathogenesis of hepatitis C virus (HCV) infection. ISG15-regulated proteins have previously been identified that putatively affect this proviral interaction. The present observational study aimed to elucidate the relation between ISG15 and these host factors during HCV infection. Transcriptomic and proteomic analyses were performed using liver samples of HCV-infected (n = 54) and uninfected (n = 10) or HBV-infected controls (n = 23). Primary human hepatocytes (PHH) were treated with Toll-like receptor ligands, interferons and kinase inhibitors. Expression of ISG15 and proteasome subunit alpha type-6 (PSMA6) was suppressed in subgenomic HCV replicon cell lines using specific siRNAs. Comparison of hepatic expression patterns revealed significantly increased signals for ISG15, IFIT1, HNRNPK and PSMA6 on the protein level as well as ISG15, IFIT1 and PSMA6 on the mRNA level in HCV-infected patients. In contrast to interferon-stimulated genes, PSMA6 expression occurred independent of HCV load and genotype. In PHH, the expression of ISG15 and PSMA6 was distinctly induced by poly(I:C), depending on IRF3 activation or PI3K/AKT signalling, respectively. Suppression of PSMA6 in HCV replicon cells led to significant induction of ISG15 expression, thus combined knock-down of both genes abrogated the antiviral effect induced by the separate suppression of ISG15. These data indicate that hepatic expression of PSMA6, which is upregulated during viral hepatitis, likely depends on TLR3 activation. PSMA6 affects the expression of immunoregulatory ISG15, a proviral factor in the pathogenesis of HCV infection. Therefore, the proteasome might be involved in the enigmatic interaction between ISG15 and HCV.


Asunto(s)
Citocinas/biosíntesis , Expresión Génica , Hepatitis C/patología , Complejo de la Endopetidasa Proteasomal/biosíntesis , Ubiquitinas/biosíntesis , Adulto , Biopsia , Células Cultivadas , Femenino , Perfilación de la Expresión Génica , Hepatocitos/fisiología , Humanos , Masculino , Persona de Mediana Edad , Proteoma/análisis
6.
Acta Psychiatr Scand ; 134(4): 329-38, 2016 10.
Artículo en Inglés | MEDLINE | ID: mdl-27497085

RESUMEN

OBJECTIVE: Psychomotor abnormalities characterize both unipolar (UP) depression and bipolar (BP) depression. We aimed to assess their neurobiological correlates in terms of motor activity (AL) and resting-state cerebral blood flow (rCBF) and investigate their association in BP, UP, and healthy controls (HC). METHOD: We enrolled 42 depressed patients (22 BP, 20 UP) and 19 HC matched for age, gender, education, income. AL and rCBF were objectively assessed with the use of wrist actigraphy and arterial spin labeling. Group differences and the association of AL and rCBF were computed. RESULTS: Activity level was significantly reduced in patients, but no difference was found between BP and UP. Increased perfusion was found in BP compared with UP and HC, in multiple brain areas. We found positive correlations of rCBF and AL in BP and UP, in different parts of the insula and frontal regions. Only BP showed a cluster in the left precentral gyrus. In HC, only inverse correlations of AL and rCBF were found. CONCLUSION: The differences in rCBF and in the localization of the clusters of positive AL/rCBF correlations between BP and UP suggest that different neural impairments may underlie motor symptoms in the two disorders, but finally converge in phenotypically similar manifestations.


Asunto(s)
Trastorno Bipolar/fisiopatología , Encéfalo/irrigación sanguínea , Trastorno Depresivo/fisiopatología , Actigrafía , Adulto , Encéfalo/fisiopatología , Femenino , Humanos , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Factores Socioeconómicos
7.
Psychol Med ; 45(4): 865-74, 2015 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-25124530

RESUMEN

BACKGROUND: The medial forebrain bundle (MFB) is an important pathway of the reward system. Two branches have been described using diffusion magnetic resonance imaging (MRI)-based tractography: the infero-medial MFB (imMFB) and the supero-lateral MFB (slMFB). Previous studies point to white-matter microstructural alterations of the slMFB in major depressive disorder (MDD) during acute episodes. To extend this finding, this study investigates whether white-matter microstructure is also altered in MDD patients that are in remission. Further, we explore associations between diffusion MRI-based metrics of white-matter microstructure of imMFB, slMFB and hedonic tone, the ability to derive pleasure. METHOD: Eighteen remitted depressed (RD) and 22 never depressed (ND) participants underwent high angular resolution diffusion-weighted imaging (HARDI) scans. To reconstruct the two pathways of the MFB (imMFB and slMFB) we used the damped Richardson-Lucy (dRL) algorithm. Mean fractional anisotropy (FA) was sampled along the tracts. RESULTS: Mean FA of imMFB, slMFB and a comparison tract (the middle cerebellar peduncle) did not differ between ND and RD participants. Hedonic capacity correlated negatively with mean FA of the left slMFB, explaining 21% of the variance. CONCLUSIONS: Diffusion MRI-based metrics of white-matter microstructure of the MFB in RD do not differ from ND. Hedonic capacity is associated with altered white-matter microstructure of the slMFB.


Asunto(s)
Anhedonia/fisiología , Trastorno Depresivo Mayor/patología , Trastorno Depresivo Mayor/fisiopatología , Imagen de Difusión por Resonancia Magnética/métodos , Haz Prosencefálico Medial/patología , Sustancia Blanca/patología , Adulto , Femenino , Humanos , Adulto Joven
8.
Leukemia ; 32(1): 92-101, 2018 01.
Artículo en Inglés | MEDLINE | ID: mdl-28659618

RESUMEN

Classical Hodgkin lymphoma (cHL) and anaplastic large cell lymphoma (ALCL) feature high expression of activator protein-1 (AP-1) transcription factors, which regulate various physiological processes but also promote lymphomagenesis. The AP-1 factor basic leucine zipper transcription factor, ATF-like 3 (BATF3), is highly transcribed in cHL and ALCL; however, its functional importance in lymphomagenesis is unknown. Here we show that proto-typical CD30+ lymphomas, namely cHL (21/30) and primary mediastinal B-cell lymphoma (8/9), but also CD30+ diffuse large B-cell lymphoma (15/20) frequently express BATF3 protein. Mass spectrometry and co-immunoprecipitation established interactions of BATF3 with JUN and JUNB in cHL and ALCL lines. BATF3 knockdown using short hairpin RNAs was toxic for cHL and ALCL lines, reducing their proliferation and survival. We identified MYC as a critical BATF3 target and confirmed binding of BATF3 to the MYC promoter. JAK/STAT signaling regulated BATF3 expression, as chemical JAK2 inhibition reduced and interleukin 13 stimulation induced BATF3 expression in cHL lines. Chromatin immunoprecipitation substantiated a direct regulation of BATF3 by STAT proteins in cHL and ALCL lines. In conclusion, we identified STAT-mediated BATF3 expression that is essential for lymphoma cell survival and promoted MYC activity in cHL and ALCL, hence we recognized a new oncogenic axis in these lymphomas.


Asunto(s)
Factores de Transcripción con Cremalleras de Leucina de Carácter Básico/genética , Enfermedad de Hodgkin/genética , Linfoma Anaplásico de Células Grandes/genética , Proteínas Proto-Oncogénicas c-myc/genética , Factores de Transcripción STAT/genética , Regulación hacia Arriba/genética , Carcinogénesis/genética , Carcinogénesis/patología , Línea Celular Tumoral , Proliferación Celular/genética , Supervivencia Celular , Regulación Neoplásica de la Expresión Génica/genética , Enfermedad de Hodgkin/patología , Humanos , Janus Quinasa 2/genética , Linfoma de Células B Grandes Difuso/genética , Linfoma de Células B Grandes Difuso/patología , Linfoma Anaplásico de Células Grandes/patología , Oncogenes/genética , Regiones Promotoras Genéticas/genética , ARN Interferente Pequeño/genética , Transducción de Señal/genética , Factor de Transcripción AP-1/genética , Activación Transcripcional/genética
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