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1.
J Gen Intern Med ; 2024 May 02.
Artículo en Inglés | MEDLINE | ID: mdl-38698296

RESUMEN

BACKGROUND: Police and security presence in healthcare settings have grown. There are few studies exploring perceptions of these law enforcement agents among US Latine immigrants, who can be vulnerable to immigration enforcement actions due to past and ongoing criminalization and anti-immigrant policies. OBJECTIVE: To explore Latine immigrants' perceptions of law enforcement in healthcare settings. DESIGN: Exploratory, semi-structured qualitative interviews asked participants about their perspectives of law enforcement in healthcare settings. PARTICIPANTS: English- and Spanish-speaking adult patients (n = 19) from a Federally Qualified Health Center (FQHC) in Los Angeles, CA, serving predominantly low-income Latine immigrants. APPROACH: We used the framework method for analysis to establish a codebook and inform our thematic interpretation. KEY RESULTS: We identified three themes: (1) perceptions of safety offered by police officers are separated from the role of immigration officers; (2) perceptions of police officers are integrated into broader perceptions of the healthcare system; and (3) lived experiences, including immigration status, influenced valence response to officer uniforms and perceptions of officers. Most participants viewed police officers positively as maintaining order and safety, separating them from federal immigration enforcement actions, and reflecting on local, state, and organizational "sanctuary" or immigrant-friendly policies. Individuals with precarious immigration status more often saw officers as intimidating. Immigration enforcement remained a key concern. CONCLUSIONS: Differentiating police and security roles from immigration enforcement in healthcare could improve Latine immigrant trust and access. Future studies should explore perspectives of Latine immigrants in localities without sanctuary laws or organizational immigrant-friendly policies.

2.
Semin Neurol ; 44(2): 217-224, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38499195

RESUMEN

There are more than 100 million forcibly displaced persons (FDPs) in the world today, including a high number of people who experience neurologic symptoms and presentations. This review summarizes the conceptual frameworks for understanding neurological health risks and conditions across the migration journey (premigration, migration journey, and postmigration) and life span, including special attention to pediatric FDPs. The interaction with psychiatric illness is discussed, as well as the available published data on neurologic presentations in FDPs in the medical literature. A social determinant of health lens is used to provide ways in which forcible displacement can influence brain health and neurological outcomes. Priorities and future needs for the neurological care of refugees and other FDPs are suggested.


Asunto(s)
Trastornos Mentales , Refugiados , Niño , Humanos , Encéfalo
4.
J Cancer Educ ; 38(6): 1871-1878, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-37526910

RESUMEN

Dietary supplements are commonly used among cancer survivors. Oncology providers rarely receive training about dietary supplements. We evaluated whether e-learning modules could improve oncology providers' dietary supplement knowledge. Oncology providers participated in the National Cancer Institute funded Integrative Oncology Scholars (IOS) program. We used posttest readiness assurance tests (RAT) to measure knowledge acquisition from modules. One cohort completed a pre and posttest RAT to assess change in knowledge. Multivariate linear regression models adjusted for gender, race, profession, and years in practice were used to determine if these characteristics were associated with posttest RAT performance and change in pre to posttest RAT scores. Scholars (N = 101) included 86% (N = 87) females; age 44 ± 10 years; 72% (N = 73) Non-Hispanic White; years in practice mean range 11-15 ± 10. There were 37 physicians, 11 physician assistants, 23 nurses, 21 social workers, 2 psychologists, 4 pharmacists, and 2 physical therapists. The posttest dietary supplement and antioxidant RAT scores for all Scholars were 67 ± 18% and 71 ± 14%. In adjusted models there were no significant associations between dietary supplement and antioxidant posttest RAT scores with Scholar characteristics. Change in RAT scores for dietary supplement and antioxidants were 25% ± 23 and 26% ± 27 (P < 0.0001). In adjusted models, there were no significant predictors of change in dietary supplement RATs. For antioxidant RATs, profession was associated with change in scores (P = 0.021). Improvement in Scholar's test scores demonstrate the IOS program can significantly increase oncology providers' knowledge of dietary supplements and antioxidants.


Asunto(s)
Oncología Integrativa , Médicos , Humanos , Femenino , Adulto , Persona de Mediana Edad , Antioxidantes , Suplementos Dietéticos
5.
Behav Modif ; 47(1): 219-246, 2023 01.
Artículo en Inglés | MEDLINE | ID: mdl-35354379

RESUMEN

The Premack principle states that any Response A can reinforce any other Response B if the independent rate of A is greater than the independent rate of B. This theory demonstrates reinforcer relativity, where the relative probabilities of responses can be more impactful than preference. Applying the Premack principle involves arranging the environment to restrict access to certain responses based on relative probabilities of a set of given responses. Though the Premack principle is described in modern behavior analytic texts, Konarski et al. identified a lack of empirical evidence to support its application. The purpose of the current paper is to systematically review the extant literature using the Premack principle and evaluate how and if researchers have applied reinforcer relativity as described by Premack and the subsequent effectiveness of these procedures. Additionally, we make recommendations for practitioners and future researchers based on our findings.


Asunto(s)
Terapia Conductista , Humanos , Terapia Conductista/métodos , Probabilidad
6.
Am J Psychoanal ; 82(4): 512-547, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36509993

RESUMEN

Inspired by the work of Fonagy (2008) and Dent and Christian (2019), this study applies a form of quantitative textual analysis to 300 terms of psychoanalytic interest in the PEP archives by tracking their historical prevalence in five-year increments using the aggregate number of articles featuring each term in the field's journals. Our results confirm some of the more well-known inflection points in the history and application of psychoanalytic theory, while also revealing some intriguing surprises. Psychoanalysis remains fundamentally a depth psychology, yet it has increasingly acknowledged the external causes of distress and trauma. Changes in the prevalence of terminology around psychopathology, defense mechanisms, development, gender and sexuality, and psychoanalytic technique are discussed.


Asunto(s)
Psicoanálisis , Terapia Psicoanalítica , Humanos , Teoría Psicoanalítica , Sexualidad
7.
Biol Open ; 10(9)2021 09 15.
Artículo en Inglés | MEDLINE | ID: mdl-34590699

RESUMEN

Elongator dysfunction is increasingly recognized as a contributor to multiple neurodevelopmental and neurodegenerative disorders including familial dysautonomia, intellectual disability, amyotrophic lateral sclerosis, and autism spectrum disorder. Although numerous cellular processes are perturbed in the context of Elongator loss, converging evidence from multiple studies has resolved Elongator's primary function in the cell to the modification of tRNA wobble uridines and the translational regulation of codon-biased genes. Here we characterize H2a.z, encoding the variant H2a histone H2A.Z, as an indirect Elongator target. We further show that canonical Notch signaling, a pathway directed by H2A.Z, is perturbed as a consequence of Elp1 loss. Finally, we demonstrate that hyperacetylation of H2A.Z and other histones via exposure to the histone deacetylase inhibitor Trichostatin A during neurogenesis corrects the expression of Notch3 and rescues the development of sensory neurons in embryos lacking the Elp1 Elongator subunit.


Asunto(s)
Histonas/metabolismo , Enfermedades Neurodegenerativas/genética , Receptores Notch/metabolismo , Transducción de Señal/genética , Factores de Elongación Transcripcional/genética , Humanos , Mutación con Pérdida de Función/genética
8.
J Autism Dev Disord ; 51(12): 4436-4446, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-33506373

RESUMEN

The purpose of this study was to investigate the effects of an intensive toilet training program on continence and self-initiation for elementary children with autism spectrum disorder (ASD). Researchers used a non-concurrent multiple baseline design (Watson and Workman in J Behav Ther Exp Psychiatry 12:257-259, 1981, https://doi.org/10.1016/0005-7916(81)90055-0 ) with regulated randomization (Koehler and Levin in Psychol Methods 3(2):206, 1998, https://doi.org/10.1037/1082-989X.3.2.206 ) to evaluate the effects of the intensive protocol with four students with ASD in the classroom where they received special education services. The protocol included increased access to fluids, contingent time intervals for sit schedules, programmed reinforcement, and dry checks. All four participants met mastery criteria and maintained independent toileting after the study's completion. Three participants began self-initiating to use the restroom. The implications and recommendations for future research are discussed.


Asunto(s)
Trastorno del Espectro Autista , Control de Esfínteres , Niño , Educación Especial , Humanos , Refuerzo en Psicología , Estudiantes
9.
J Autism Dev Disord ; 51(11): 4199-4212, 2021 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-33511525

RESUMEN

This review evaluated the effects of augmentative and alternative communication (AAC) on speech development in children with autism spectrum disorders (ASD); replicated, updated, and extended the systematic review by Schlosser and Wendt (American Journal of Speech-Language Pathology 17:212-230, 2008). Twenty-five single case design articles and three group design articles published between 1975 and May 2020 met inclusion criteria related to participant characteristics, intervention type, design, and visual analysis of dependent variable outcomes. Overall, AAC resulted in improved speech production; however, speech gains that did occur did not surpass AAC use.


Asunto(s)
Trastorno del Espectro Autista , Equipos de Comunicación para Personas con Discapacidad , Patología del Habla y Lenguaje , Niño , Comunicación , Humanos , Habla
10.
Behav Anal Pract ; 13(1): 247-252, 2020 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-32231987

RESUMEN

Research indicates that momentary time sampling (MTS) is often the best interval-measurement system when observing duration of behavior. Several recent studies recommended considering mean duration of target behavior, as well as durations of measurement intervals and observation sessions, to minimize measurement error in MTS. This report describes the steps we used to minimize measurement error in a single-case design research study. Further, we detail our methods for monitoring and reporting MTS measurement error across conditions by intermittently collecting and analyzing duration per occurrence measurements.

11.
Afr Health Sci ; 19(2): 1888-1896, 2019 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-31656472

RESUMEN

BACKGROUND: Adolescents experience high rates of depression, initiation of sexual activity, and substance use. OBJECTIVES: To better understand the demographics of adolescents presenting to an adolescent clinic in Uganda, and to elucidate which factors are associated with depressive symptoms, sexual initiation, and substance use. METHODS: A retrospective review was performed on intake forms obtained during interviews with adolescents presenting to the Makerere/Mulago Columbia Adolescent Health Clinic (MMCAH) in Kampala, Uganda. RESULTS: Depressive symptoms in adolescents were correlated with having a chronic illness (p=.026), and reported poor quality of home life (p<.001). Initiation of sexual activity was also correlated with chronic illness (p=.008) and poor quality of home life (p=.006). Substance use was correlated with maternal death (p=.041), chronic illness (p=.038), and substance use among family members (p<.001) and friends (p<.001). CONCLUSIONS: Knowing the aforementioned risk factors can help us better understand the needs of adolescents presenting to MMCAH, and allows us to develop targeted interventions aimed at decreasing health risks in Kampala's adolescent population.


Asunto(s)
Depresión/epidemiología , Conducta Sexual/psicología , Trastornos Relacionados con Sustancias/epidemiología , Adolescente , Servicios de Salud del Adolescente , Niño , Depresión/diagnóstico , Depresión/psicología , Femenino , Humanos , Masculino , Calidad de Vida , Estudios Retrospectivos , Factores de Riesgo , Uganda/epidemiología , Adulto Joven
12.
Am J Intellect Dev Disabil ; 124(4): 374-390, 2019 07.
Artículo en Inglés | MEDLINE | ID: mdl-31199689

RESUMEN

Special educators are relying more heavily on computer assisted instruction (CAI) programs to teach academic content to students with intellectual disability (ID) than ever before. Research in this area is growing; however, no formal review of the literature has been conducted to examine the efficacy of using CAI to teach academic content to students with ID. This review explores the nature of academic content taught to students with ID using CAI, the CAI programs used to provide instruction, research methodology, and student learning outcomes associated with CAI. We also address gaps in the research while making suggestions for focusing future efforts to keep pace with changes in technology and the increasing implementation of CAI in special education classrooms.


Asunto(s)
Instrucción por Computador , Educación Especial , Discapacidad Intelectual/rehabilitación , Adolescente , Niño , Preescolar , Instrucción por Computador/estadística & datos numéricos , Educación Especial/estadística & datos numéricos , Humanos
13.
Front Psychol ; 4: 259, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-23840191

RESUMEN

Previous research has demonstrated that the use of emotion regulation strategies can vary by sociocultural context. In a previous study, we reported changes in the use of two different emotion regulation strategies at an annual alternative cultural event, Burning Man (McRae et al., 2011). In this sociocultural context, as compared to typically at home, participants reported less use of expressive suppression (a strategy generally associated with maladaptive outcomes), and greater use of cognitive reappraisal (a strategy generally associated with adaptive outcomes). What remained unclear was whether these changes in self-reported emotion regulation strategy use were characterized by changes in the regulation of positive emotion, negative emotion, or both. We addressed this issue in the current study by asking Burning Man participants separate questions about positive and negative emotion. Using multiple datasets, we replicated our previous findings, and found that the decreased use of suppression is primarily driven by reports of decreased suppression of positive emotion at Burning Man. By contrast, the increased use of reappraisal is not characterized by differential reappraisal of positive and negative emotion at Burning Man. Moreover, we observed novel individual differences in the magnitude of these effects. The contextual changes in self-reported suppression that we observe are strongest for men and younger participants. For those who had previously attended Burning Man, we observed lower levels of self-reported suppression in both sociocultural contexts: Burning Man and typically at home. These findings have implications for understanding the ways in which certain sociocultural contexts may decrease suppression, and possibly minimize its associated maladaptive effects.

14.
Am J Hosp Palliat Care ; 30(5): 419-24, 2013 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-22798634

RESUMEN

PURPOSE: To evaluate primary care physicians' understanding of and experience with advance care planning (ACP), palliative care, and hospice and how this might affect their utilization of these services. METHODS: Investigator-generated survey. RESULTS: Older age, more years in practice, and more personal and professional experience with ACP were correlated with an increase in the percentage of patients with progressive, chronic life-limiting diseases with whom physicians discussed advance directives. Overall, 97.5% of physician's expressed comfort in discussing ACP yet reported discussing advance directives with only 43% of appropriate patients. DISCUSSION: Often, discussions about ACP or referrals to palliative care or hospice do not occur until the patient is near the end of life. Our results indicate that primary care physician's personal and professional experience with ACP may be contributing to some of the barriers to these discussions.


Asunto(s)
Planificación Anticipada de Atención/estadística & datos numéricos , Conocimientos, Actitudes y Práctica en Salud , Cuidados Paliativos al Final de la Vida/estadística & datos numéricos , Cuidados Paliativos/estadística & datos numéricos , Médicos/estadística & datos numéricos , Adulto , Factores de Edad , Anciano , Actitud del Personal de Salud , Recolección de Datos , Femenino , Humanos , Masculino , Persona de Mediana Edad , Ohio/epidemiología , Relaciones Médico-Paciente , Pautas de la Práctica en Medicina/estadística & datos numéricos , Cuidado Terminal/estadística & datos numéricos
15.
Am J Med Qual ; 27(4): 291-6, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22327023

RESUMEN

The objective of this study was to test the efficacy of a standardized form used during transfers between long-term care facilities (LTCFs) and the acute care setting. The intervention consisted of development and implementation of the transfer form and education about its use. Charts from 26 LTCFs and 1 acute care hospital were reviewed at 1 and 6 months prior to initiation of the transfer form (2007) and at 1 and 6 months after initiation of the transfer form (2008); 210 patient charts were reviewed in 2007 and 172 in 2008. There was 79% concordance between documented LTCF advance directives (ADs) and hospital ADs in 2008-an increase from 66.6% in 2007 (P = .038). Inpatient hospice/palliative care admissions rose from 1.5% in 2007 to 7.7% in 2009 (P = .015). The standardized transfer form improved communication of ADs between LTCFs and the hospital. Secondarily, it may have increased admissions to the acute palliative care unit.


Asunto(s)
Continuidad de la Atención al Paciente , Prioridad del Paciente , Transferencia de Pacientes/organización & administración , Registros , Anciano , Comunicación , Continuidad de la Atención al Paciente/organización & administración , Cuidados Críticos/organización & administración , Femenino , Humanos , Cuidados a Largo Plazo/organización & administración , Masculino
16.
Pediatr Transplant ; 16(1): 83-91, 2012 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-22122074

RESUMEN

Clinical end-points dictate large trial enrollments and exclude children with the rare intestine transplant procedure (ITx), who experience higher drug-related morbidity. We evaluate the novel rejection-risk parameter, allo-(antigen)-specific CD154 + TcMs (i) as surrogates for ACR using Prentice's criteria, (ii) for association with immunosuppression targets to determine Fleming's surrogate end-point designation, and (iii) as time-to-event end-point in a simulated comparison of alemtuzumab (NCT#01208337, n = 14) and rabbit anti-human thymocyte globulin (rATG, n = 16) among 30 children with ITx. CD154 + TcM were measured in MLR before, and at 1-60 and 61-200 days after ITx (NCT#01163578). CD154 + TcM correlate significantly with rejection severity (Spearman r = 0.685, p = 2.03E-5) and associate with biopsy-proven ITx rejection with sensitivity/specificity of 94%/84% [corrected] independent of immunosuppressant. Previously stated sensitivity of 90% is incorrect. [corrected]. The rejection-risk threshold of CD154 + TcM resolves rapidly in 200-day follow-up (46 ± 20 vs. 158 ± 59 days, p = 0.009, K-M) with alemtuzumab, which demonstrates lower 90-day ACR incidence (50% vs. 69%, p=NS, Fisher's exact), and is associated with accelerated prednisone minimization to ≤2.5 mg/day, compared with rATG (120 ± 28 vs. 180 ± 30 days, p = 0.027, K-M). As a surrogate end-point, time-to-rejection-risk resolution measured with CD154 + TcM portends 50% reduction in sample sizes in a simulated trial of alemtuzumab vs. rATG. Rejection-risk assessment with CD154 + TcM may enable informed immunosuppression minimization, and preliminary efficacy comparisons in pediatric ITx.


Asunto(s)
Ligando de CD40/biosíntesis , Memoria Inmunológica , Intestinos/trasplante , Linfocitos T/metabolismo , Trasplante/métodos , Adolescente , Suero Antilinfocítico/metabolismo , Biomarcadores/metabolismo , Niño , Preescolar , Rechazo de Injerto , Humanos , Inmunosupresores/uso terapéutico , Lactante , Pediatría/métodos , Riesgo , Sensibilidad y Especificidad , Trasplante Homólogo/métodos
17.
Am J Pathol ; 179(4): 1929-38, 2011 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-21854741

RESUMEN

Recurrent rejection shortens graft survival after intestinal transplantation (ITx) in children, most of whom also experience early acute cellular rejection (rejectors). To elucidate mechanisms common to early and recurrent rejection, we used a test cohort of 20 recipients to test the hypothesis that candidate peripheral blood leukocyte genes that trigger rejection episodes would be evident late after ITx during quiescent periods in genome-wide gene expression analysis and would achieve quantitative real-time PCR replication pre-ITx (another quiescent period) and in the early post-ITx period during first rejection episodes. Eight genes were significantly up-regulated among rejectors in the late post-ITx and pre-ITx periods, compared with nonrejectors: TBX21, CCL5, GNLY, SLAMF7, TGFBR3, NKG7, SYNE1, and GK5. Only CCL5 was also up-regulated in the early post-ITx period. Among resting peripheral blood leukocyte subsets in randomly sampled nonrejectors, CD14(+) monocytes expressed the CCL5 protein maximally. Compared with nonrejectors, rejectors demonstrated higher counts of both circulating CCL5(+)CD14(+) monocytes and intragraft CD14(+) monocyte-derived macrophages in immunohistochemistry of postperfusion and early post-ITx biopsies from the test and an independent replication cohort. Donor-specific alloreactivity measured with CD154(+) T-cytotoxic memory cells correlated with the CCL5 gene and intragraft CD14(+) monocyte-derived macrophages at graft reperfusion and early post-ITx. CCL5 gene up-regulation and CD14(+) macrophages likely prime cellular ITx rejection. Infiltration of reperfused intestine allografts with CD14(+) macrophages may predict rejection events.


Asunto(s)
Regulación de la Expresión Génica , Rechazo de Injerto/genética , Rechazo de Injerto/inmunología , Intestinos/trasplante , Leucocitos/metabolismo , Receptores de Lipopolisacáridos/metabolismo , Macrófagos/trasplante , Presentación de Antígeno/inmunología , Preescolar , Femenino , Perfilación de la Expresión Génica , Humanos , Memoria Inmunológica/inmunología , Lactante , Inflamación/genética , Intestinos/inmunología , Intestinos/patología , Recuento de Linfocitos , Macrófagos/metabolismo , Masculino , Reacción en Cadena en Tiempo Real de la Polimerasa , Linfocitos T Citotóxicos/inmunología , Donantes de Tejidos , Trasplante Homólogo
18.
Depress Anxiety ; 28(3): 202-9, 2011 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-21394853

RESUMEN

BACKGROUND: Generalized anxiety disorder (GAD) is the most prevalent anxiety disorder among the elderly and has high functional and cognitive morbidity. However, late-life GAD is relatively understudied and its functional neuroanatomy is uncharted. Several imaging studies have suggested abnormalities in the cognitive control systems of emotion regulation in anxiety disorders in young adults. The aim of this study was to examine the neural correlates of emotion regulation in late-life GAD. METHOD: We compared 7 elderly GAD subjects and 10 elderly nonanxious comparison subjects using functional MRI. Regional cerebral blood flow (rCBF) was measured using pulsed arterial spin labeling perfusion MRI at rest and during an emotion regulation paradigm. RESULTS: Relative to the rest condition, elderly nonanxious comparison subjects had increased rCBF during worry induction (WI) in the right insula, bilateral amygdala, and associative temporooccipital areas. Elderly GAD subjects had increased rCBF during WI in the associative temporooccipital areas, but not in the insula or the amygdala. During worry suppression (WS), elderly nonanxious comparison subjects had increased rCBF in the prefrontal cortex (PFC) and dorsal ACC. Elderly GAD subjects had no changes in rCBF during WS in the PFC. CONCLUSIONS: When attempting to regulate their emotional responses, elderly anxious subjects failed to activate prefrontal regions involved in the downregulation of negative emotions. These results, showing that elderly anxious subjects are not effectively engaging the PFC in suppressing worry, may be clinically relevant for developing personalized therapeutic strategies for the treatment of late-life GAD.


Asunto(s)
Adaptación Psicológica/fisiología , Trastornos de Ansiedad/fisiopatología , Encéfalo/irrigación sanguínea , Emociones/fisiología , Procesamiento de Imagen Asistido por Computador , Angiografía por Resonancia Magnética , Imagen por Resonancia Magnética , Anciano , Amígdala del Cerebelo/irrigación sanguínea , Trastornos de Ansiedad/diagnóstico , Nivel de Alerta/fisiología , Mapeo Encefálico , Corteza Cerebral/irrigación sanguínea , Trastornos del Conocimiento/diagnóstico , Trastornos del Conocimiento/fisiopatología , Dominancia Cerebral/fisiología , Regulación hacia Abajo/fisiología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Lóbulo Occipital/irrigación sanguínea , Corteza Prefrontal/irrigación sanguínea , Valores de Referencia , Flujo Sanguíneo Regional/fisiología , Lóbulo Temporal/irrigación sanguínea
19.
Transplantation ; 90(11): 1226-31, 2010 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-20881665

RESUMEN

BACKGROUND: As a significant determinant of T- and B-cell cooperation, CD154 has been used to identify allospecific T-cytotoxic memory cells (TcM) for rejection risk assessment with high sensitivity or specificity but not for alloreactive B-cells, especially among recipients predisposed to acute cellular and humoral rejection, that is, children with intestinal transplantation (ITx). METHODS: Single blood samples from 32 pediatric ITx after lymphocyte depleting induction therapy were obtained within 30 days of protocol biopsies. Samples were assayed for allospecific CD154CD19 B cells and allospecific CD154 TcM in 16-hr live-cell mixed leukocyte reaction using multiparametric flow cytometry. Results were expressed as the immunoreactivity index (IR) or the ratio of donor- to third-party-induced CD154 B cells or TcM. The rejection threshold IR of B cells was determined by logistic regression, leave-one-out cross-validation, and receiver operating characteristic analyses. RESULTS: Biopsy-proven acute cellular rejection was present in 15 subjects (rejectors) and absent in 17 (nonrejectors). In archived serum samples from 16 of 32 subjects donor-specific anti-HLA antibodies (DSA) were assayed by Luminex bead array. DSA were absent in all 7 nonrejectors but present in 7 of 9 rejectors. The IR of allospecific CD154CD19 B cells more than or equal to 1.351 was associated with rejector status and was present in 13 of 15 rejectors (sensitivity 87%) and absent in 15 of 17 nonrejectors (specificity 88%). Excellent correlations were seen between CD154CD19 B cells and CD154 TcM (Spearman ρ=0.647, P=0.0001) but could not be tested independently for DSA, which was highly correlated with rejector status and with CD154 TcM. CONCLUSIONS: Allospecific CD154CD19 B cells identify rejection-prone children with ITx and can likely substitute for T-cell alloreactivity in estimating rejection risk in this rare subject population.


Asunto(s)
Linfocitos B/inmunología , Ligando de CD40/sangre , Rechazo de Injerto/inmunología , Intestinos/trasplante , Tolerancia al Trasplante , Antígenos CD19/sangre , Biopsia , Células Cultivadas , Preescolar , Femenino , Citometría de Flujo , Rechazo de Injerto/sangre , Rechazo de Injerto/patología , Antígenos HLA/inmunología , Humanos , Lactante , Intestinos/inmunología , Isoanticuerpos/sangre , Modelos Logísticos , Prueba de Cultivo Mixto de Linfocitos , Masculino , Pennsylvania , Medición de Riesgo , Factores de Riesgo , Linfocitos T Citotóxicos/inmunología , Factores de Tiempo , Trasplante Homólogo , Resultado del Tratamiento
20.
Transplantation ; 89(11): 1371-7, 2010 Jun 15.
Artículo en Inglés | MEDLINE | ID: mdl-20458270

RESUMEN

BACKGROUND: More than 60% children with small bowel transplantation (SBTx) experience acute cellular rejection. PURPOSE/METHODS: To identify children at risk of rejection, donor- and third-party-induced proliferation of T-helper and T cytotoxic (Tc) cells, and their naïve and memory (M) subsets was evaluated simultaneously in single blood samples from 28 children who received SBTx after induction with rabbit anti-human thymocyte globulin. Proliferation was measured by dilution of the intravital dye carboxyfluorescein succinimidyl ester (CFSE) in 3- to 4-day mixed leukocyte reaction co-culture. The ratio of donor- and third-party-induced proliferation (CFSE(low)) of the T cells was reported as the immunoreactivity (IR) index for each subset. Rejectors were defined as those who experienced biopsy-proven acute cellular rejection within 60 days of the assay. IR more than 1 signified increased risk of rejection and IR less than 1 implied decreased risk. RESULTS: Rejectors (n=16) and Nonrejectors (n=12) were similar in general demographics. Significantly higher counts were observed for all proliferated CFSE(low) T-cell subsets among rejectors, compared with nonrejectors. Logistic regression, leave-one-out cross-validation, and receiver operating characteristic analyses showed that the IR of Tc associated best with biopsy-proven rejection (sensitivity >87.5%, specificity >83.3%). IR of CFSE(low) Tc correlated significantly with IR of proinflammatory, allospecific CD154(+)Tc-M (r=0.682, P=0.005) and inversely with IR of allospecific, antiinflammatory, CTLA4(+)Tc-M (r=-0.638, P=0.047). CONCLUSIONS: Proliferative alloresponses of Tc cells can identify rejection-prone children receiving SBTx.


Asunto(s)
Rechazo de Injerto/epidemiología , Intestino Delgado/trasplante , Linfocitos T Citotóxicos/inmunología , Enfermedad Aguda , Animales , División Celular , Preescolar , Técnicas de Cocultivo , Citometría de Flujo , Globulinas , Rechazo de Injerto/inmunología , Rechazo de Injerto/patología , Humanos , Lactante , Intestino Delgado/patología , Prueba de Cultivo Mixto de Linfocitos , Conejos
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