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1.
Int Rev Psychiatry ; 35(2): 180-193, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37105147

RESUMEN

The Coronavirus disease (COVID-19) outbreak, and the restrictions implemented by governments to limit its public health impact, may have determined a reduction of the right to mental health of people with severe mental health conditions, that is a limitation to adequate, human, and value-based mental healthcare, with rising inequalities in comparison with the general population. This systematic review was, therefore, conducted to collate evidence on the impact of the pandemic period on the mental health of individuals with pre-existing severe mental health conditions. Of 3,774 retrieved citations, we selected 21 studies meeting the inclusion criteria. The majority of the included studies assessed trends in psychological symptoms over the pandemic period, then arguing that symptoms worsened for a number of reasons, including the risk of contracting the virus, the disruption of mental health services, and the feelings of loneliness and isolation associated with the restriction measures. Even though studies provided somewhat contradictory results, the majority of evidence indicates that people with pre-existing mental health conditions were more likely to report greater self-isolation distress, anxiety, depression, COVID-19-related perceived stress, and were more likely to voluntarily self-isolate than those without a mental health condition. These findings appeared to suggest that a combination of factors related to the pandemic itself and to the prevention and mitigation strategies were responsible for a reduction of the right to mental health of people with mental health conditions, with increased inequalities in comparison with the general population.


Asunto(s)
COVID-19 , Salud Mental , Humanos , COVID-19/epidemiología , SARS-CoV-2 , Ansiedad/epidemiología , Ansiedad/psicología , Brotes de Enfermedades , Depresión/psicología
2.
Space Sci Rev ; 218(5): 38, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35757012

RESUMEN

This paper presents the highlights of joint observations of the inner magnetosphere by the Arase spacecraft, the Van Allen Probes spacecraft, and ground-based experiments integrated into spacecraft programs. The concurrent operation of the two missions in 2017-2019 facilitated the separation of the spatial and temporal structures of dynamic phenomena occurring in the inner magnetosphere. Because the orbital inclination angle of Arase is larger than that of Van Allen Probes, Arase collected observations at higher L -shells up to L ∼ 10 . After March 2017, similar variations in plasma and waves were detected by Van Allen Probes and Arase. We describe plasma wave observations at longitudinally separated locations in space and geomagnetically-conjugate locations in space and on the ground. The results of instrument intercalibrations between the two missions are also presented. Arase continued its normal operation after the scientific operation of Van Allen Probes completed in October 2019. The combined Van Allen Probes (2012-2019) and Arase (2017-present) observations will cover a full solar cycle. This will be the first comprehensive long-term observation of the inner magnetosphere and radiation belts.

3.
Epidemiol Psychiatr Sci ; 31: e39, 2022 Jun 08.
Artículo en Inglés | MEDLINE | ID: mdl-35674122

RESUMEN

AIMS: As refugees and asylum seekers are at high risk of developing mental disorders, we assessed the effectiveness of Self-Help Plus (SH + ), a psychological intervention developed by the World Health Organization, in reducing the risk of developing any mental disorders at 12-month follow-up in refugees and asylum seekers resettled in Western Europe. METHODS: Refugees and asylum seekers with psychological distress (General Health Questionnaire-12 ⩾ 3) but without a mental disorder according to the Mini International Neuropsychiatric Interview (M.I.N.I.) were randomised to either SH + or enhanced treatment as usual (ETAU). The frequency of mental disorders at 12 months was measured with the M.I.N.I., while secondary outcomes included self-identified problems, psychological symptoms and other outcomes. RESULTS: Of 459 participants randomly assigned to SH + or ETAU, 246 accepted to be interviewed at 12 months. No difference in the frequency of any mental disorders was found (relative risk [RR] = 0.841; 95% confidence interval [CI] 0.389-1.819; p-value = 0.659). In the per protocol (PP) population, that is in participants attending at least three group-based sessions, SH + almost halved the frequency of mental disorders at 12 months compared to ETAU, however so few participants and events contributed to this analysis that it yielded a non-significant result (RR = 0.528; 95% CI 0.180-1.544; p-value = 0.230). SH + was associated with improvements at 12 months in psychological distress (p-value = 0.004), depressive symptoms (p-value = 0.011) and wellbeing (p-value = 0.001). CONCLUSIONS: The present study failed to show any long-term preventative effect of SH + in refugees and asylum seekers resettled in Western European countries. Analysis of the PP population and of secondary outcomes provided signals of a potential effect of SH + in the long-term, which would suggest the value of exploring the effects of booster sessions and strategies to increase SH + adherence.


Asunto(s)
Trastornos Mentales , Distrés Psicológico , Refugiados , Trastornos por Estrés Postraumático , Europa (Continente) , Conductas Relacionadas con la Salud , Humanos , Trastornos Mentales/epidemiología , Refugiados/psicología , Trastornos por Estrés Postraumático/psicología
4.
Epidemiol Psychiatr Sci ; 30: e15, 2021 Jan 28.
Artículo en Inglés | MEDLINE | ID: mdl-33504412

RESUMEN

AIMS: To develop recommendations for strategies and interventions to reduce stigma and discrimination related to coronavirus disease 2019 (COVID-19), through reviewing and synthesising evidence in relation to COVID-19 and other disease outbreaks and infectious/stigmatised conditions from systematic reviews and primary studies and recommendations from additional materials. METHODS: Rapid review, drawing on the World Health Organization's (WHO) methodology for developing interim guidelines during health emergencies. PubMed/MEDLINE, PsycINFO, Cochrane Central and Campbell Collaboration searched up to mid-April 2020. Searches were supplemented by reference-searching and expert recommendations. Searches were designed to identify: (1) systematic reviews (<10 years), or (2) primary intervention studies (no date limit) reporting evidence on anti-stigma interventions (in relation to COVID-19 or other infectious/stigmatised conditions) or (3) additional relevant materials. Data were extracted on population, intervention, outcome and results. These data were compiled into evidence summary tables and narrative overviews. Recommendations on strategies for COVID-19 stigma-reduction were developed using the WHO 'Evidence to Decision' framework approach. The review protocol was registered with PROSPERO (registration ID: CRD42020177677). RESULTS: The searches identified a total of 4150 potentially relevant records, from which 12 systematic reviews and 29 additional articles were included. Overarching considerations and specific recommendations focus on: (1) language/words used in relation to COVID-19 and affected people; (2) media/journalistic practices; (3) public health interventions; (4) targeted public health interventions for key groups and (5) involving communities and key stakeholders. CONCLUSIONS: These recommendations represent the first consolidated evidence-based guidance on stigma and discrimination reduction in relation to COVID-19. Mitigating the impact of stigma is critical in reducing distress and negative experiences, and strengthening communities' resolve to work together during exceptional circumstances. Ultimately, reducing stigma helps addressing structural inequalities that drive marginalisation and exacerbate both health risks and the impact of stigma. Administrations and decision makers are urged to consider integrating these recommendations into the ongoing COVID-19 response.


Asunto(s)
COVID-19/psicología , Discriminación en Psicología , Discriminación Social , Estigma Social , Brotes de Enfermedades , Humanos , Pandemias , Salud Pública , SARS-CoV-2
5.
Earth Planets Space ; 72(1): 111, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32831576

RESUMEN

We investigate the longitudinal structure of the oxygen torus in the inner magnetosphere for a specific event found on 12 September 2017, using simultaneous observations from the Van Allen Probe B and Arase satellites. It is found that Probe B observed a clear enhancement in the average plasma mass (M) up to 3-4 amu at L = 3.3-3.6 and magnetic local time (MLT) = 9.0 h. In the afternoon sector at MLT ~ 16.0 h, both Probe B and Arase found no clear enhancements in M. This result suggests that the oxygen torus does not extend over all MLT but is skewed toward the dawn. Since a similar result has been reported for another event of the oxygen torus in a previous study, a crescent-shaped torus or a pinched torus centered around dawn may be a general feature of the O+ density enhancement in the inner magnetosphere. We newly find that an electromagnetic ion cyclotron (EMIC) wave in the H+ band appeared coincidently with the oxygen torus. From the lower cutoff frequency of the EMIC wave, the ion composition of the oxygen torus is estimated to be 80.6% H+, 3.4% He+, and 16.0% O+. According to the linearized dispersion relation for EMIC waves, both He+ and O+ ions inhibit EMIC wave growth and the stabilizing effect is stronger for He+ than O+. Therefore, when the H+ fraction or M is constant, the denser O+ ions are naturally accompanied by the more tenuous He+ ions, resulting in a weaker stabilizing effect (i.e., larger growth rate). From the Probe B observations, we find that the growth rate becomes larger in the oxygen torus than in the adjacent regions in the plasma trough and the plasmasphere.

6.
Space Sci Rev ; 215(1): 9, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-30880847

RESUMEN

With the advent of the Heliophysics/Geospace System Observatory (H/GSO), a complement of multi-spacecraft missions and ground-based observatories to study the space environment, data retrieval, analysis, and visualization of space physics data can be daunting. The Space Physics Environment Data Analysis System (SPEDAS), a grass-roots software development platform (www.spedas.org), is now officially supported by NASA Heliophysics as part of its data environment infrastructure. It serves more than a dozen space missions and ground observatories and can integrate the full complement of past and upcoming space physics missions with minimal resources, following clear, simple, and well-proven guidelines. Free, modular and configurable to the needs of individual missions, it works in both command-line (ideal for experienced users) and Graphical User Interface (GUI) mode (reducing the learning curve for first-time users). Both options have "crib-sheets," user-command sequences in ASCII format that can facilitate record-and-repeat actions, especially for complex operations and plotting. Crib-sheets enhance scientific interactions, as users can move rapidly and accurately from exchanges of technical information on data processing to efficient discussions regarding data interpretation and science. SPEDAS can readily query and ingest all International Solar Terrestrial Physics (ISTP)-compatible products from the Space Physics Data Facility (SPDF), enabling access to a vast collection of historic and current mission data. The planned incorporation of Heliophysics Application Programmer's Interface (HAPI) standards will facilitate data ingestion from distributed datasets that adhere to these standards. Although SPEDAS is currently Interactive Data Language (IDL)-based (and interfaces to Java-based tools such as Autoplot), efforts are under-way to expand it further to work with python (first as an interface tool and potentially even receiving an under-the-hood replacement). We review the SPEDAS development history, goals, and current implementation. We explain its "modes of use" with examples geared for users and outline its technical implementation and requirements with software developers in mind. We also describe SPEDAS personnel and software management, interfaces with other organizations, resources and support structure available to the community, and future development plans. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s11214-018-0576-4) contains supplementary material, which is available to authorized users.

7.
Epidemiol Psychiatr Sci ; 28(4): 376-388, 2019 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-30739625

RESUMEN

AimsIn the past few years, there has been an unprecedented increase in the number of forcibly displaced migrants worldwide, of which a substantial proportion is refugees and asylum seekers. Refugees and asylum seekers may experience high levels of psychological distress, and show high rates of mental health conditions. It is therefore timely and particularly relevant to assess whether current evidence supports the provision of psychosocial interventions for this population. We conducted a systematic review and meta-analysis of randomised controlled trials (RCTs) assessing the efficacy and acceptability of psychosocial interventions compared with control conditions (treatment as usual/no treatment, waiting list, psychological placebo) aimed at reducing mental health problems in distressed refugees and asylum seekers. METHODS: We used Cochrane procedures for conducting a systematic review and meta-analysis of RCTs. We searched for published and unpublished RCTs assessing the efficacy and acceptability of psychosocial interventions in adults and children asylum seekers and refugees with psychological distress. Post-traumatic stress disorder (PTSD), depressive and anxiety symptoms at post-intervention were the primary outcomes. Secondary outcomes include: PTSD, depressive and anxiety symptoms at follow-up, functioning, quality of life and dropouts due to any reason. RESULTS: We included 26 studies with 1959 participants. Meta-analysis of RCTs revealed that psychosocial interventions have a clinically significant beneficial effect on PTSD (standardised mean difference [SMD] = -0.71; 95% confidence interval [CI] -1.01 to -0.41; I2 = 83%; 95% CI 78-88; 20 studies, 1370 participants; moderate quality evidence), depression (SMD = -1.02; 95% CI -1.52 to -0.51; I2 = 89%; 95% CI 82-93; 12 studies, 844 participants; moderate quality evidence) and anxiety outcomes (SMD = -1.05; 95% CI -1.55 to -0.56; I2 = 87%; 95% CI 79-92; 11 studies, 815 participants; moderate quality evidence). This beneficial effect was maintained at 1 month or longer follow-up, which is extremely important for populations exposed to ongoing post-migration stressors. For the other secondary outcomes, we identified a non-significant trend in favour of psychosocial interventions. Most evidence supported interventions based on cognitive behavioural therapies with a trauma-focused component. Limitations of this review include the limited number of studies collected, with a relatively low total number of participants, and the limited available data for positive outcomes like functioning and quality of life. CONCLUSIONS: Considering the epidemiological relevance of psychological distress and mental health conditions in refugees and asylum seekers, and in view of the existing data on the effectiveness of psychosocial interventions, these interventions should be routinely made available as part of the health care of distressed refugees and asylum seekers. Evidence-based guidelines and implementation packages should be developed accordingly.


Asunto(s)
Ansiedad/terapia , Depresión/terapia , Aceptación de la Atención de Salud/psicología , Psicoterapia/métodos , Refugiados/psicología , Trastornos por Estrés Postraumático/terapia , Estrés Psicológico/terapia , Ansiedad/psicología , Depresión/psicología , Femenino , Humanos , Masculino , Salud Mental , Evaluación de Resultado en la Atención de Salud , Aceptación de la Atención de Salud/etnología , Ensayos Clínicos Controlados Aleatorios como Asunto , Trastornos por Estrés Postraumático/psicología , Estrés Psicológico/psicología
8.
J Nat Med ; 71(1): 265-271, 2017 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-27848205

RESUMEN

Glycyrrhiza uralensis roots used in this study were produced using novel cultivation systems, including artificial hydroponics and artificial hydroponic-field hybrid cultivation. The equivalency between G. uralensis root extracts produced by hydroponics and/or hybrid cultivation and a commercial Glycyrrhiza crude drug were evaluated for both safety and efficacy, and there were no significant differences in terms of mutagenicity on the Ames tests. The levels of cadmium and mercury in both hydroponic roots and crude drugs were less than the limit of quantitation. Arsenic levels were lower in all hydroponic roots than in the crude drug, whereas mean lead levels in the crude drug were not significantly different from those in the hydroponically cultivated G. uralensis roots. Both hydroponic and hybrid-cultivated root extracts showed antiallergic activities against contact hypersensitivity that were similar to those of the crude drug extracts. These study results suggest that hydroponic and hybrid-cultivated roots are equivalent in safety and efficacy to those of commercial crude drugs. Further studies are necessary before the roots are applicable as replacements for the currently available commercial crude drugs produced from wild plant resources.


Asunto(s)
Medicamentos Herbarios Chinos/química , Glycyrrhiza uralensis/química , Hidroponía/métodos , Raíces de Plantas/química
9.
Epidemiol Psychiatr Sci ; 25(6): 532-540, 2016 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-26467074

RESUMEN

AIMS: In recent years several warnings have been issued by regulatory authorities on the risk of electrocardiogram abnormalities in individuals exposed to psychotropic drugs. As a consequence of these warnings, monitoring of the QT interval corrected for heart rate (QTc) has become increasingly common. This study was conducted to measure the frequency of QTc prolongation in unselected psychiatric patients, and to document the associated factors using a cross-sectional approach. METHOD: The study was carried out in 35 Italian psychiatric services that are part of the STAR (Servizi Territoriali Associati per la Ricerca) Network, a research group established to produce scientific knowledge by collecting data under ordinary circumstances. During a three-month period, a consecutive unselected series of both in- and out-patients were enrolled if they performed an ECG during the recruitment period and were receiving psychotropic drugs on the day ECG was recorded. RESULTS: During the recruitment period a total of 2411 patients were included in the study. The prevalence of QTc prolongation ranged from 14.7% (men) and 18.6% (women) for the cut-off of 450 ms, to 1.26% (men) and 1.01% (women) for the cut-off of 500 ms. In the multivariate model conducted in the whole sample of patients exposed to psychotropic drugs, female sex, age, heart rate, alcohol and/or substance abuse, cardiovascular diseases and cardiovascular drug treatment, and drug overdose were significantly associated with QTc prolongation. In patients exposed to antipsychotic drugs, polypharmacy was positively associated with QTc prolongation, whereas use of aripiprazole decreased the risk. In patients exposed to antidepressant drugs, use of citalopram, citalopram dose and use of haloperidol in addition to antidepressant drugs, were all positively associated with QTc prolongation. CONCLUSIONS: The confirmation of a link between antipsychotic polypharmacy and QTc prolongation supports the current guidelines that recommend avoiding the concurrent use of two or more antipsychotic drugs, and the confirmation of a link between citalopram and QTc prolongation supports the need for routine QTc monitoring. The relatively low proportion of patients with QTc prolongation not only suggests compliance with current safety warnings issued by regulatory authorities, but also casts some doubts on the clinical relevance of QTc prolongation related to some psychotropic drugs.


Asunto(s)
Antipsicóticos/efectos adversos , Síndrome de QT Prolongado/inducido químicamente , Polifarmacia , Adulto , Estudios Transversales , Electrocardiografía , Femenino , Humanos , Italia , Masculino , Prevalencia , Factores de Riesgo
10.
Epidemiol Psychiatr Sci ; 24(5): 379-81, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-26145734

RESUMEN

In the populations of refugees and asylum seekers hosted in high-income countries, access to mental health care and psychotropic drugs, is a major challenge. A recent Swedish cross-sectional register study has explored this phenomenon in a national cohort of 43 403 young refugees and their families from Iraq, Iran, Eritrea, Ethiopia, Somalia and Afghanistan. This register study found lower rates of dispensed psychotropic drugs among recently settled refugees, as compared with Swedish-born residents, with an increase in the use with duration of residence. In this commentary, the results of this survey are discussed in view of their global policy implications for high-income countries hosting populations of refugees and asylum seekers.

11.
Epidemiol Psychiatr Sci ; 23(1): 19-20, 2014 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-24495456

RESUMEN

According to a recent cross-sectional study, some antidepressants, including amitriptyline, citalopram and escitalopram, are associated with QTc prolongation. However, the magnitude of this association is relatively small, and the clinical implications uncertain. In this article, the main strengths and weaknesses of this cross-sectional study are briefly analysed alongside recent warnings issued by regulatory authorities. Implications for research and practice are discussed.

12.
Gene Ther ; 15(3): 171-82, 2008 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-17989707

RESUMEN

Adoptive transfer of CD4+CD25+ regulatory T cells has been shown to have therapeutic effects in experimental graft-vs-host disease (GVHD) models. Chemokines play an important role in the recruitment of alloreactive donor T cells into target organs during GVHD. In this study, we investigated the effectiveness of targeted delivery of CD4+CD25+ regulatory T cells via a transfected chemokine receptor on reduction of organ damage during acute GVHD. High levels of expression of Th1-associated chemokines (CXCL9, CXCL10 and CXCL11) and their receptor CXCR3 were observed in the liver, lung and intestine of GVHD-induced recipient mice. Recipient mice that had undergone transfer of CD4+CD25+Foxp3+ CXCR3-transfected T cells (CXCR3-Treg cells) showed significant amelioration of GVHD changes in the liver, lung and intestine in comparison with recipient mice that had received CD4+CD25+Foxp3+ T cells (Treg cells) or naturally occurring CD4+CD25+ regulatory T cells. This was due to more pronounced migration of CXCR3-Treg cells and their localization for a longer time in Th1-associated chemokine-expressing organs, resulting in stronger suppressive activity. We succeeded in preparing chemokine receptor-expressing Treg cells and demonstrated their ability to ameliorate disease progression upon accumulation in target organs. This method may provide a new therapeutic approach for organ damage in acute GVHD.


Asunto(s)
Traslado Adoptivo/métodos , Terapia Genética/métodos , Enfermedad Injerto contra Huésped/terapia , Receptores CXCR3/metabolismo , Linfocitos T Reguladores/inmunología , Animales , Trasplante de Médula Ósea , Femenino , Factores de Transcripción Forkhead/análisis , Factores de Transcripción Forkhead/genética , Vectores Genéticos/administración & dosificación , Enfermedad Injerto contra Huésped/inmunología , Enfermedad Injerto contra Huésped/patología , Intestinos/inmunología , Intestinos/patología , Hígado/inmunología , Hígado/patología , Pulmón/inmunología , Pulmón/patología , Ratones , Ratones Endogámicos C57BL , Ratones Endogámicos DBA , Modelos Animales , Receptores CXCR3/análisis , Receptores CXCR3/genética , Retroviridae/genética
13.
Scand J Immunol ; 66(6): 654-61, 2007 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-17983422

RESUMEN

Aging readily affects immune system under the influence of environmental and/or intrinsic factors while accelerating the development of various immune disorders including autoimmune diseases. Little is known about molecular and cellular mechanisms connecting between immune senescence and development of autoimmune diseases. Here, we first show strain-specific and aging-sensitive onset of B-cell abnormality in a lupus-prone MRL/Mp.Fas(lpr) (MRL/lpr) strain of mice. This abnormality was characterized by the regression of B lymphopoiesis in the bone marrow of this strain. We next examined the association between the B-cell regression and onset of autoimmune diseases in aged (MRL/lpr x C3H/He.Fas(lpr)) F2 mice, in which pathologic phenotypes, such as glomerulonephritis, vasculitis, sialoadenitis and arthritis, variously developed. We also searched whole genome to identify genetic loci linked to the B-cell regression by using the same F2 mice. The B-cell regression manifested in the spleen of F2 mice was retrospectively evaluated by reverse transcriptase-based PCR quantification. The results demonstrated that the onset of autoimmune diseases in the F2 mice was not associated with the aging-sensitive B-cell regression. The genetic study identified a significant locus responsible for the B-cell regression in the vicinity of D5Mit233 (29 cM). This is first evidence for the presence of a genetic locus that affects B lymphopoiesis in an aging-sensitive manner.


Asunto(s)
Envejecimiento/genética , Autoanticuerpos/genética , Linfocitos B/inmunología , Mapeo Cromosómico , Linfopoyesis/genética , Linfopoyesis/inmunología , Ratones Endogámicos MRL lpr/genética , Envejecimiento/inmunología , Alelos , Animales , Anticuerpos Antinucleares/sangre , Anticuerpos Antinucleares/genética , Autoanticuerpos/sangre , Enfermedades Autoinmunes/genética , Modelos Animales de Enfermedad , Femenino , Marcadores Genéticos , Predisposición Genética a la Enfermedad , Glomerulonefritis/genética , Glomerulonefritis/inmunología , Lupus Eritematoso Sistémico/genética , Lupus Eritematoso Sistémico/inmunología , Masculino , Ratones , Ratones Endogámicos C3H , Organismos Libres de Patógenos Específicos
14.
Br J Psychiatry ; 191: 113-9, 2007 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-17666494

RESUMEN

BACKGROUND: Several, although not all, of the previous small diffusion-weighted imaging (DWI) studies have shown cortical white-matter disruption in schizophrenia. AIMS: To investigate cortical white-matter microstructure with DWI in a large community-based sample of people with schizophrenia. METHOD: Sixty-eight people with schizophrenia and 64 healthy controls underwent a session of DWI to obtain the apparent diffusion coefficient (ADC) of white-matter water molecules. Regions of interest were placed in cortical lobes. RESULTS: Compared with controls, the schizophrenia group had significantly greater ADCs in frontal, temporal and occipital white matter (analysis of covariance, P < 0.05). CONCLUSIONS: Our findings confirm the presence of cortical white-matter microstructure disruption in frontal and temporo-occipital lobes in the largest sample of people with schizophrenia thus for studied with this technique. Future brain imaging studies, together with genetic investigations, should further explore white-matter integrity and genes encoding myelin-related protein expression in people with first-episode schizophrenia and those at high risk of developing the disorder.


Asunto(s)
Encefalopatías/patología , Esquizofrenia/patología , Adulto , Estudios de Casos y Controles , Corteza Cerebral/patología , Imagen de Difusión por Resonancia Magnética/métodos , Femenino , Humanos , Masculino , Persona de Mediana Edad
15.
Oncogene ; 26(36): 5300-8, 2007 Aug 09.
Artículo en Inglés | MEDLINE | ID: mdl-17325662

RESUMEN

Homozygous deletions (HD) provide an important resource for identifying the location of candidate tumor suppressor genes. To identify the tumor suppressor gene in oral cancer, we employed high-resolution comparative genomic hybridization (CGH)-array analysis. We identified a homozygous loss of FAT (4q35), a new member of the human cadherin superfamily, from genome-wide screening of copy number alterations in one primary oral cancer. This result was evaluated by genomic polymerase chain reaction in 13 oral cancer cell lines and 20 primary oral cancers and Southern blot in the cell lines. We found frequent exonic HD of FAT in the cell lines (3/13, 23%) and in primary oral cancers (16/20, 80%). FAT expression was absent in these cell lines. Homozygous deletion hot spots were observed in exon 1 (9/20, 45%) and exon 4 (7/20, 35%). Moreover, loss of gene expression was identified in other types of squamous cell carcinoma. The methylation status of the FAT CpG island in squamous cell carcinomas correlated negatively with its expression. Our results identify mutations in FAT as an important factor in the development of oral cancer and indicate the importance of FATs function in some squamous cell carcinomas.


Asunto(s)
Cadherinas/genética , Carcinoma de Células Escamosas/genética , Eliminación de Gen , Genes Supresores de Tumor , Homocigoto , Neoplasias de la Boca/genética , Hibridación de Ácido Nucleico , Secuencia de Bases , Carcinoma de Células Escamosas/patología , Línea Celular Tumoral , Cromosomas Artificiales Bacterianos , Cromosomas Humanos Par 4 , Cartilla de ADN , Humanos , Neoplasias de la Boca/patología , ARN Mensajero/genética
16.
Ann Rheum Dis ; 65(10): 1273-8, 2006 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-16569686

RESUMEN

BACKGROUND: The spontaneous onset of macroscopic arthropathy in the ankle of the particular F1 mice descended from two Fas-deficient strains of mice; a mutant substrain of MRL/Mp.Fas(lpr) (MRL/rpl) and C3H/He.Fas(lpr) (C3H/lpr) was recently observed. AIM: To histopathologically characterise and genetically interpret the unique inheritance mode of disease in this arthropathy model. METHODS: MRL/rpl, C3H/lpr, (MRL/rpl x C3H/lpr; MC) F1, (C3H/lpr x MRL/rpl; CM) F1 and MCF2 mice were bred under specific pathogen-free conditions. Histopathological grade of arthropathy was determined at 6 months by examination under a light microscope. To search for a linkage locus to the arthropathy, the whole genome of selected 48 male MCF2 mice with 71 polymorphic microsatellite markers was scanned, followed by quantitative trait locus analysis. RESULTS: The incidence of microscopically defined arthropathy in the male and female MCF1 groups was 100% and 19.4%, respectively. No incidence was observed in the parental strains, MRL/rpl and C3H/lpr, and in CMF1 mice. In the MCF1 mice, the arthropathy mainly affected the ankle joints and was histopathologically characterised by marked entheseal proliferation with chondrocytic differentiation and ossification in the ankle joints, the manifestations similar to ankylosing enthesitis reported previously. An MRL/rpl-derived autosomal dominant susceptibility locus was mapped in the distal of D7Mit68 (60 cM) to the ankylosis onset. CONCLUSION: The MCF1 mice stably develop spontaneous ankylosing disorders in the ankle, with a male predominance. The unique inheritance mode of ankylosis is possibly interpreted by the genetic interaction between the autosomal dominant locus and a Y-linked locus.


Asunto(s)
Anquilosis/genética , Predisposición Genética a la Enfermedad , Receptor fas/deficiencia , Animales , Anquilosis/patología , Modelos Animales de Enfermedad , Femenino , Genotipo , Masculino , Ratones , Ratones Endogámicos C3H , Ratones Endogámicos MRL lpr , Repeticiones de Microsatélite , Sitios de Carácter Cuantitativo , Índice de Severidad de la Enfermedad , Receptor fas/genética
17.
Ann Rheum Dis ; 65(4): 495-500, 2006 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-16150787

RESUMEN

OBJECTIVE: To identify the genetic loci regulating the incidence and severity of renal autoimmune vasculitis developed in murine lupus. METHODS: Vasculitis of renal arteries was histopathologically evaluated in MRL/Mp-Fas(lpr) (MRL/lpr), C57BL/6-Fas(lpr) (B6/lpr), (MRL/lpr x B6/lpr) F1, and MRL/lpr x (MRL/lpr x B6/lpr) F1 backcross mice. Using genomic DNA samples of the backcross mice, genome-wide scans, association studies, and linkage analyses were carried out based on genotypes of polymorphic microsatellite markers. Correlations of vasculitis grade and levels of various autoantibodies were also evaluated. RESULTS: Two recessive susceptibility loci of the MRL allele were identified on chromosomes 4 and 1, which had previously been defined as the autoimmune related loci termed Arvm1 and Sle-1/Nba2, respectively. The former was epistatic to the latter in a female specific manner. The titre of antinuclear autoantibody (ANA) in IgG class, but not ANA in IgM class or anti-dsDNA in either IgG or IgM class, correlated significantly with vasculitis grade. CONCLUSIONS: The present loci have been reported in previous studies using a different set of murine strains, suggesting that they are of importance in the development of autoimmune vasculitis in murine models. The concomitance of autoimmune vasculitis and IgG ANA suggests a shared genetic factor regulating these traits.


Asunto(s)
Anticuerpos Antinucleares/sangre , Enfermedades Autoinmunes/genética , Epistasis Genética , Lupus Eritematoso Sistémico/genética , Vasculitis/genética , Animales , Enfermedades Autoinmunes/inmunología , Enfermedades Autoinmunes/patología , Mapeo Cromosómico/métodos , Femenino , Predisposición Genética a la Enfermedad , Genotipo , Lupus Eritematoso Sistémico/inmunología , Masculino , Ratones , Ratones Endogámicos C57BL , Ratones Endogámicos MRL lpr , Repeticiones de Microsatélite , Arteria Renal/patología , Índice de Severidad de la Enfermedad , Vasculitis/inmunología , Vasculitis/patología
18.
Clin Exp Immunol ; 141(2): 363-71, 2005 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-15996201

RESUMEN

Accumulation of plasma cells in the synovium is one of the diagnostic hallmarks in the histopathological manifestations of rheumatoid arthritis (RA). This seems to be prominent even prior to significant B cell infiltration and/or formation of lymphoid follicles in the synovium. To clarify the mechanism of early plasma cell accumulation, we examined in situ expression of chemokines and their receptors using synovial targeting biopsy specimens, which were obtained under arthroscopy from early RA patients. By immunohistochemical staining, plasma cells were found to express a chemokine receptor CXCR3, while synovial fibroblasts in the synovial sublining regions expressed its ligand, Mig/CXCL9. By reverse transcription-polymerase chain reaction (RT-PCR), using targeted lesions of synovial tissues obtained by laser capture microdissection, expression levels of Mig/CXCL9 in the synovial sublining regions were remarkably high and were likely to be associated with interferon (IFN)-gamma expression. Furthermore, cultured synovial fibroblasts were confirmed to produce Mig/CXCL9 upon stimulation with IFN-gamma. Our results indicate that in the early stage of RA, plasma cells expressing CXCR3 may be recruited directly from the circulation into the synovial sublining regions by its ligand, Mig/CXCL9, produced by synovial fibroblasts.


Asunto(s)
Artritis Reumatoide/patología , Quimiocinas CXC/biosíntesis , Péptidos y Proteínas de Señalización Intercelular/biosíntesis , Células Plasmáticas/metabolismo , Receptores de Quimiocina/metabolismo , Membrana Sinovial/patología , Adulto , Anciano , Artritis Reumatoide/inmunología , Artritis Reumatoide/metabolismo , Quimiocina CXCL9 , Quimiocinas/biosíntesis , Quimiocinas/genética , Quimiocinas/metabolismo , Femenino , Fibroblastos/metabolismo , Expresión Génica , Humanos , Masculino , Microdisección/métodos , Persona de Mediana Edad , Receptores CXCR3 , Receptores de Quimiocina/biosíntesis , Receptores de Quimiocina/genética , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa/métodos , Membrana Sinovial/metabolismo , Células Tumorales Cultivadas
19.
Psiquiatr. biol. (Ed. impr.) ; 11(5): 167-168, sept. 2004. ilus, tab
Artículo en Es | IBECS | ID: ibc-35724

RESUMEN

INTRODUCCIÓN: Los estudios que investigan la eficacia de intervenciones clínicas para reducir la falta de adherencia al tratamiento han generado hallazgos discordantes. Este problema sigue siendo común en la práctica clínica. OBJETIVOS: Revisar sistemáticamente si hay intervenciones clínicas eficaces que los servicios psiquiátricos comunitarios puedan poner en práctica para reducir la falta de adherencia. MÉTODO: Se realizó una revisión sistemática y un análisis de metarregresión de ensayos controlados, aleatorizados y ensayos clínicos controlados, con el fin de evaluar la eficacia de intervenciones para mejorar la adherencia. RESULTADOS: Revisamos 24 estudios, más de la mitad de los cuales fueron ensayos controlados aleatorizados. En 14 estudios la intervención experimental fue un programa educativo. Cinco estudios evaluaron las sesiones educativas prealta, 3 exploraron el beneficio de intervenciones psicoterapéuticas y 2 examinaron el efecto de avisos telefónicos. La estimación global de la eficacia de estas intervenciones presenta una odds ratio de 2,59 (intervalo de confianza del 95 por ciento, 2,21-3,03) para resultados dicotómicos, y una diferencia media estandarizada de 0,36 (intervalo de confianza del 95 por ciento, 0,06-0,66) para resultados continuos. CONCLUSIONES: Los servicios psiquiátricos comunitarios potencialmente pueden utilizar intervenciones clínicas eficaces, respaldadas por la evidencia científica, para reducir la falta de adherencia del paciente. DECLARACIÓN DE INTERESES: Ninguna (AU)


Asunto(s)
Adherencias Tisulares/fisiopatología , Adherencias Tisulares/psicología , Trastornos Psicóticos/psicología , Trastornos Psicóticos/terapia , Psicoterapia/métodos , Psiquiatría Comunitaria/métodos , Selección de Paciente , Muestreo Aleatorio y Sistemático , Ensayos Clínicos Controlados como Asunto/métodos , Recolección de Datos/métodos , Sistemas de Información , Predicción/métodos
20.
Clin Exp Immunol ; 136(2): 239-44, 2004 May.
Artículo en Inglés | MEDLINE | ID: mdl-15086386

RESUMEN

MRL/Mp mice bearing the Fas deletion mutant gene, lpr (MRL/lpr), spontaneously develop polyarthritis, sialoadenitis and dacryoadenitis, resembling rheumatoid arthritis (RA), and also corneal involvement such as keratopathy and scleritis, which is a major complication in RA patients. In this study, we found that the expression levels of IL-1beta and MMP-1 mRNAs in cornea were high in both MRL/lpr and MRL/Mp-+/+ strains of mice at an age younger than when they develop any inflammatory lesions. This was not true of other inbred strains, even those bearing the lpr gene, and also not of (NZB x NZW) F1 lupus mice. There was no significant difference in the expression of IL-1alpha and TGFbeta in cornea in these strains. Using crosses between MRL/lpr and C3H/HeJ-lpr/lpr (C3H/lpr) mice, at least the expression of IL-1beta was found to be under the control of the MRL genetic background, likely with a recessive mode of inheritance. Considering that IL-1beta in cornea was detected particularly in the epithelial layer, the high expression of IL-1beta in cornea is most likely involved in the genetic predisposition for corneal involvement and possibly also for arthritis in an MRL strain of mice.


Asunto(s)
Artritis Reumatoide/inmunología , Epitelio Corneal/inmunología , Interleucina-1/análisis , Receptor fas/genética , Animales , Eliminación de Gen , Expresión Génica , Genes Recesivos , Predisposición Genética a la Enfermedad , Inmunohistoquímica/métodos , Interleucina-1/genética , Metaloproteinasa 1 de la Matriz/genética , Ratones , Ratones Endogámicos MRL lpr , Ratones Endogámicos , Microscopía Electrónica , ARN Mensajero/análisis , Factor de Crecimiento Transformador beta/genética
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