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1.
Dev Psychobiol ; 62(4): 532-543, 2020 05.
Artigo em Inglês | MEDLINE | ID: mdl-31502680

RESUMO

Despite evidence that acute stress impairs attention in adults, there has been minimal research in children. Here, the effects of acute stress on Go/No-go performance were examined in young children (M age = 5.41 years). Given the critical role of the parent-child relationship to children's self-regulatory development, the extent to which parenting stress predicts children's cognitive vulnerability to acute stress and autonomic reactivity was also investigated. A between-groups design (n = 58 stress, n = 26 control) was used with oversampling of the stressor-exposed children to examine individual differences. The Parenting Stress Index and subscales were employed as a measure of parenting stress. Acute stress impaired children's sustained attention, but not inhibitory control. Higher parenting stress was associated with vulnerability to attentional impairment. Parenting distress was also positively associated with sympathetic reactivity to acute stress, but neither sympathetic nor parasympathetic reactivity was associated with attentional impairment. A conceptual model of pathways through which repetitive acute stress may contribute to self-regulatory difficulties is presented, including the potential buffering role of caregivers.


Assuntos
Atenção/fisiologia , Sistema Nervoso Autônomo/fisiopatologia , Disfunção Cognitiva/fisiopatologia , Inibição Psicológica , Mães , Desempenho Psicomotor/fisiologia , Autocontrole , Estresse Psicológico/fisiopatologia , Doença Aguda , Criança , Filho de Pais com Deficiência , Pré-Escolar , Disfunção Cognitiva/etiologia , Suscetibilidade a Doenças , Feminino , Humanos , Masculino , Poder Familiar , Estresse Psicológico/complicações
2.
Stress ; 21(4): 347-354, 2018 07.
Artigo em Inglês | MEDLINE | ID: mdl-29631452

RESUMO

Although prior research has characterized stress system reactivity (i.e. hypothalamic-pituitary-adrenal axis, HPAA; autonomic nervous system, ANS) in children, it has yet to examine the extent to which biological reactivity predicts concurrent goal-directed behavior. Here, we employed a stressor paradigm that allowed concurrent assessment of both stress system reactivity and performance on a speeded-response task to investigate the links between biological reactivity and cognitive function under stress. We further investigated gender as a moderator given previous research suggesting that the ANS may be particularly predictive of behavior in males due to gender differences in socialization. In a sociodemographically diverse sample of young children (N = 58, M age = 5.38 yrs; 44% male), individual differences in sociodemographic covariates (age, household income), HPAA (i.e. cortisol), and ANS (i.e. respiratory sinus arrhythmia, RSA, indexing the parasympathetic branch; pre-ejection period, PEP, indexing the sympathetic branch) function were assessed as predictors of cognitive performance under stress. We hypothesized that higher income, older age, and greater cortisol reactivity would be associated with better performance overall, and flexible ANS responsivity (i.e. RSA withdrawal, PEP shortening) would be predictive of performance for males. Overall, females performed better than males. Two-group SEM analyses suggest that, for males, greater RSA withdrawal to the stressor was associated with better performance, while for females, older age, higher income, and greater cortisol reactivity were associated with better performance. Results highlight the relevance of stress system reactivity to cognitive performance under stress. Future research is needed to further elucidate for whom and in what situations biological reactivity predicts goal-directed behavior.


Assuntos
Cognição/fisiologia , Hidrocortisona/análise , Sistema Hipotálamo-Hipofisário/fisiopatologia , Sistema Hipófise-Suprarrenal/fisiopatologia , Estresse Psicológico/fisiopatologia , Criança , Pré-Escolar , Feminino , Humanos , Individualidade , Masculino , Tempo de Reação/fisiologia , Arritmia Sinusal Respiratória/fisiologia , Fatores Sexuais
3.
Pediatr Neurosurg ; 53(1): 13-17, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-28934739

RESUMO

BACKGROUND/AIMS: The management of extracerebral collections of fluid in patients with hydrocephalus can be problematic for either their simultaneous separate management or sequential management, each of which may require multiple surgeries and the management of external drains. The object of this report is to review the experience with a shunt configuration that simultaneously diverts ventricular fluid and extracerebral fluid, whether subdural or subarachnoid in location, through different outflow resistances. METHODS: The medical records, including neuroimaging of patients with hydrocephalus and clinically significant extracerebral collections of low density who were managed by implanting a differential pressure type shunt, were retrospectively reviewed. RESULTS: Four patients, 3 children and 1 adult, met inclusion criteria. Three had the entire differential pressure shunt implanted under 1 anesthetic, and 1 had a catheter inserted into the subdural space and connected into an existing ventriculoperitoneal shunt system. The extracerebral fluid collections cleared in all 4 patients, and the CSF shunt continued to function normally. CONCLUSION: A single surgical procedure to implant a differential pressure shunt can simultaneously drain and obliterate an extracerebral fluid collection while managing the hydrocephalus. Compared to routines that include external drainage, differential pressure shunting requires fewer surgeries, shorter hospitalization, with expected less expense.


Assuntos
Ventrículos Cerebrais/fisiologia , Ventrículos Cerebrais/cirurgia , Pressão do Líquido Cefalorraquidiano/fisiologia , Derivações do Líquido Cefalorraquidiano/métodos , Líquido Cefalorraquidiano/fisiologia , Hidrocefalia/cirurgia , Adolescente , Derivações do Líquido Cefalorraquidiano/instrumentação , Criança , Feminino , Humanos , Hidrocefalia/fisiopatologia , Lactente , Masculino , Espaço Subdural/fisiologia , Derivação Ventriculoperitoneal/instrumentação , Derivação Ventriculoperitoneal/métodos , Adulto Jovem
4.
J Trauma Dissociation ; 19(3): 307-324, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29547079

RESUMO

Prior research has identified the role of childhood maltreatment in externalizing problems and executive function (EF) deficits, but minimal work has been done to characterize the effects of co-occurring maltreatment types, defined as polyvictimization. Here, we sought to characterize the association between polyvictimization and externalizing problems in a sample of foster care children aged 3-4 years (N = 84) and examine how EF may mediate or moderate that relationship. A moderation model was supported in that only polyvictimized children with EF scores 1.62 or more standard deviations below the mean were at heightened risk for clinically severe externalizing problems, while no association between polyvictimization and externalizing problems were observed for children who scored at the mean or above on the EF measure. Findings highlight that EF may serve as a resilience factor indicating that individual differences in polyvictimized children's EF skills help to predict variability in externalizing problems. Future research on designing and optimizing intervention programs that target EF skills may mitigate the development of maladaptive outcomes for polyvictimized children.


Assuntos
Maus-Tratos Infantis/psicologia , Transtornos do Comportamento Infantil/psicologia , Criança Acolhida/psicologia , Vítimas de Crime/psicologia , Função Executiva , Emoções Manifestas , Pré-Escolar , Feminino , Humanos , Controle Interno-Externo , Masculino
5.
Dev Sci ; 20(4)2017 07.
Artigo em Inglês | MEDLINE | ID: mdl-27061609

RESUMO

Maltreated youths in foster care often experience negative developmental and psychological outcomes, which have been linked with poor response inhibition. Recent evidence suggests that childhood maltreatment is also associated with alterations in the neural circuitry underlying response inhibition. However, a burgeoning line of research has begun to explore the mitigating effects of preventive interventions on neural functioning. The current study used event-related functional magnetic resonance imaging to explore the impact of early childhood maltreatment and a preventive intervention on response inhibition in early adolescence. Thirty-six demographically similar adolescents (ages 9-14 years) completed a Go/NoGo task. The sample included nonmaltreated adolescents (n = 14) and maltreated adolescents who were in foster care as preschoolers and randomly assigned to receive services as usual (n = 11) or a preventive intervention, Multidimensional Treatment Foster Care for Preschoolers (n = 11). The groups demonstrated similar behavioral performance but significantly different neural patterns. The maltreated adolescents who received services as usual demonstrated subcortical hypoactivity during successful response inhibition and subcortical hyperactivity during unsuccessful response inhibition. In contrast, the nonmaltreated adolescents and maltreated adolescents who received the intervention exhibited strikingly similar neural patterns during successful response inhibition, but the maltreated adolescents who received the intervention demonstrated prefrontal hypoactivity during unsuccessful response inhibition. These findings offer preliminary evidence that early childhood maltreatment alters the neural patterns underlying response inhibition in early adolescence and that participating in a preventive intervention could mitigate maltreatment-related effects on these neural systems.


Assuntos
Encéfalo/fisiologia , Maus-Tratos Infantis/psicologia , Vias Neurais/fisiopatologia , Adolescente , Criança , Criança Acolhida , Pré-Escolar , Humanos , Imageamento por Ressonância Magnética , Tempo de Reação
6.
J Craniofac Surg ; 28(4): 1090-1092, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28230587

RESUMO

A 34-year-old woman with severe craniofacial trauma, which included eversion of the entire frontal bone, survived with high-quality functional and cosmetic results as a consequence of efficient and aggressive action by emergency technicians and physicians. Early preliminary steps of craniofacial reconstruction provided a structural foundation that facilitated this outcome.


Assuntos
Traumatismos Faciais/diagnóstico por imagem , Traumatismos Faciais/cirurgia , Fraturas Ósseas/cirurgia , Osso Frontal/lesões , Osso Frontal/cirurgia , Procedimentos de Cirurgia Plástica , Adulto , Traumatismos Faciais/etiologia , Feminino , Fraturas Ósseas/etiologia , Humanos
7.
Pediatr Neurosurg ; 50(2): 63-7, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25824532

RESUMO

The medical records of all children in whom packing was used to control severe intracranial hemorrhage were reviewed. Eight children, with ages ranging from newborn to 4 years, met the inclusion criteria and all survived. Five were victims of severe closed head trauma, 2 had received penetrating cranial injuries, and 1 developed severe bleeding while undergoing surgery for a malignant tumor in the posterior fossa. Blood loss at the time of removal of the packing was minimal in 7 patients and was surgically controllable in the other. Packing is a simple, efficient, and safe maneuver which can very often halt intracranial bleeding that is considered to be otherwise uncontrollable, and can thereby limit the consequences of prolonged or repeated periods of hypotension and possible exsanguination.


Assuntos
Tamponamento Interno/métodos , Hemorragias Intracranianas/cirurgia , Complicações Intraoperatórias/cirurgia , Neoplasias Encefálicas/complicações , Neoplasias Encefálicas/cirurgia , Pré-Escolar , Tamponamento Interno/efeitos adversos , Traumatismos Cranianos Fechados/complicações , Traumatismos Cranianos Fechados/cirurgia , Traumatismos Cranianos Penetrantes/complicações , Traumatismos Cranianos Penetrantes/cirurgia , Humanos , Lactente , Recém-Nascido , Hemorragias Intracranianas/etiologia , Complicações Intraoperatórias/etiologia , Resultado do Tratamento
8.
Pediatr Neurosurg ; 50(5): 243-9, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26367858

RESUMO

Cerebellar tonsils moved significantly upward in 3 patients with Chiari type I who underwent supratentorial cranial vault expansion to alleviate intracranial pressure related to multisutural craniosynostosis. The Chiari type I deformities in these patients were the biomechanical consequence of posterior fossa-cerebellar disproportion caused by supratentorial craniocerebral disproportion secondary to multisutural craniosynostosis. The authors postulate that all cases of Chiari type I deformity share the sine qua non feature of posterior fossa-cerebellar disproportion.


Assuntos
Malformação de Arnold-Chiari/patologia , Cerebelo/patologia , Fossa Craniana Posterior/patologia , Craniossinostoses/cirurgia , Craniotomia/métodos , Fenômenos Biomecânicos , Criança , Humanos , Lactente , Masculino , Resultado do Tratamento
9.
Front Neurosci ; 17: 1152038, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37621716

RESUMO

Introduction: The teratogenic effects of prenatal alcohol exposure (PAE) have been examined in animal models and humans. The current study extends the prior literature by quantifying differences in brain structure for individuals with a fetal alcohol spectrum disorder (FASD) compared to typically developing controls, as well as examining FASD subtypes. We hypothesized the FASD group would reveal smaller brain volume, reduced cortical thickness, and reduced surface area compared to controls, with the partial fetal alcohol syndrome (pFAS)/fetal alcohol syndrome (FAS) subtypes showing the largest effects and the PAE/alcohol-related neurodevelopmental disorder (ARND) subtype revealing intermediate effects. Methods: The sample consisted of 123 children and adolescents recruited from a single site including children with a diagnosis of FASD/PAE (26 males, 29 females) and controls (34 males, 34 females). Structural T1-weighted MRI scans were obtained on a 3T Trio TIM scanner and FreeSurfer v7.2 was used to quantify brain volume, cortical thickness, and surface area. Analyses examined effects by subgroup: pFAS/FAS (N = 32, Mage = 10.7 years, SEage = 0.79), PAE/ARND (N = 23, Mage = 10.8, SEage = 0.94), and controls (N = 68, Mage = 11.1, SEage = 0.54). Results: Total brain volume in children with an FASD was smaller relative to controls, but subtype analysis revealed only the pFAS/FAS group differed significantly from controls. Regional analyses similarly revealed reduced brain volume in frontal and temporal regions for children with pFAS/FAS, yet children diagnosed with PAE/ARND generally had similar volumes as controls. Notable differences to this pattern occurred in the cerebellum, caudate, and pallidum where children with pFAS/FAS and PAE/ARND revealed lower volume relative to controls. In the subset of participants who had neuropsychological testing, correlations between volume and IQ scores were observed. Goodness-of-Fit analysis by age revealed differences in developmental patterns (linear vs. quadratic) between groups in some cases. Discussion: This study confirmed prior results indicating decreased brain volume in children with an FASD and extended the results by demonstrating differential effects by structure for FASD subtypes. It provides further evidence for a complex role of PAE in structural brain development that is likely related to the cognitive and behavioral effects experienced by children with an FASD.

10.
Neurotrauma Rep ; 3(1): 286-291, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36060455

RESUMO

The goal of this study was to ascertain the efficacy, safety, and comparability of ultra-early cranioplasty (CP; defined here as <30 days from the original craniectomy) to conventional cranioplasty (defined here as >30 days from the original craniectomy). A retrospective review of CPs performed at our institution between January 2016 and July 2020 was performed. Craniectomies initially performed at other institutions were excluded. Seventy-seven CPs were included in our study. Ultra-early CP was defined as CP performed within 30 days of craniectomy whereas conventional CP occurred after 30 days. Post-operative wound infection rates, rate of return to the operating room (OR) with or without bone flap removal, operative length, and rate of post-CP hydrocephalus were compared between the two groups. Thirty-nine and 38 patients were included in the ultra-early and conventional CP groups, respectively. The average number of days to CP in the ultra-early group was 17.70 ± 7.75 days compared to 95.70 ± 65.60 days in the conventional group. The mean Glasgow Coma Scale upon arrival to the emergency room was 7.28 ± 3.90 and 6.92 ± 4.14 for the ultra-early and conventional groups, respectively. The operative time was shorter in the ultra-early cohort than that in the conventional cohort (ultra-early, 2.40 ± 0.71 h; conventional, 3.00 ± 1.63 h; p = 0.0336). The incidence of post-CP hydrocephalus was also lower in the ultra-early cohort (ultra-early, 10.3%; conventional, 31.6%; p = 0.026). No statistically significant differences were observed regarding post-operative infection, return to the OR, or bone flap removal. Our study shows that ultra-early CP can significantly reduce the rate of post-CP hydrocephalus, as well as operative time in comparison to conventional CP. However, the timing of CP post-DC should remain a patient-centered consideration.

11.
Eur J Trauma Emerg Surg ; 47(5): 1491-1497, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32451568

RESUMO

PURPOSE: Terminal complement pathway activation after traumatic brain injury (TBI) leads to formation of the membrane attack complex (MAC/C5b-9) which induces neuronal cell death and host-mediated secondary brain injury. Serum levels of soluble MAC (sC5b-9) have not been previously determined in patients with isolated TBI. METHODS: A prospective observational cohort study was performed during a 5-year time-period on adult patients with isolated TBI admitted to an academic level I trauma center in the United States. Controls consisted of patients with femur shaft fractures with or without TBI to mitigate the effect of systemic complement activation by peripheral trauma. Healthy volunteers served as internal controls. The sC5b-9 serum concentrations were measured on the day of admission by enzyme-linked immunosorbent assay (ELISA) and compared between the study cohorts. Univariate analysis was performed to determine independent predictive variables of major complications during hospital admission. RESULTS: Serum sC5b-9 levels were significantly elevated in patients with isolated TBI (n = 42), compared to patients with isolated femoral shaft fractures (n = 36) or combined TBI and femoral shaft fractures (n = 30; p < 0.05). There was no significant difference in serum sC5b-9 levels between the femur group and the combined injury group, compared to the healthy volunteers (n = 21). Univariate analysis revealed serum sC5b-9 levels as an independent predictor of major postinjury complications after isolated TBI (p < 0.01). CONCLUSION: The soluble terminal complement complex sC5b-9 represents a potential novel serum biomarker specific for isolated head injuries, since peripheral trauma did not appear to affect the serum sC5b-9 levels.


Assuntos
Lesões Encefálicas Traumáticas , Complexo de Ataque à Membrana do Sistema Complemento , Biomarcadores , Ativação do Complemento , Proteínas do Sistema Complemento , Humanos , Estudos Prospectivos
12.
Neurosurgery ; 88(6): E495-E504, 2021 05 13.
Artigo em Inglês | MEDLINE | ID: mdl-33693899

RESUMO

BACKGROUND: Sport-related structural brain injury (SRSBI) is intracranial pathology incurred during sport. Management mirrors that of non-sport-related brain injury. An empirical vacuum exists regarding return to play (RTP) following SRSBI. OBJECTIVE: To provide key insight for operative management and RTP following SRSBI using a (1) focused systematic review and (2) survey of expert opinions. METHODS: A systematic literature review of SRSBI from 2012 to present in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines and a cross-sectional survey of RTP in SRSBI by 31 international neurosurgeons was conducted. RESULTS: Of 27 included articles out of 241 systematically reviewed, 9 (33.0%) case reports provided RTP information for 12 athletes. To assess expert opinion, 31 of 32 neurosurgeons (96.9%) provided survey responses. For acute, asymptomatic SRSBI, 12 (38.7%) would not operate. Of the 19 (61.3%) who would operate, midline shift (63.2%) and hemorrhage size > 10 mm (52.6%) were the most common indications. Following SRSBI with resolved hemorrhage, with or without burr holes, the majority of experts (>75%) allowed RTP to high-contact/collision sports at 6 to 12 mo. Approximately 80% of experts did not endorse RTP to high-contact/collision sports for athletes with persistent hemorrhage. Following craniotomy for SRSBI, 40% to 50% of experts considered RTP at 6 to 12 mo. Linear regression revealed that experts allowed earlier RTP at higher levels of play (ß = -0.58, 95% CI -0.111, -0.005, P = .033). CONCLUSION: RTP decisions following structural brain injury in athletes are markedly heterogeneous. While individualized RTP decisions are critical, aggregated expert opinions from 31 international sports neurosurgeons provide key insight. Level of play was found to be an important consideration in RTP determinations.


Assuntos
Traumatismos em Atletas/reabilitação , Concussão Encefálica/reabilitação , Lesões Encefálicas Traumáticas/reabilitação , Volta ao Esporte/estatística & dados numéricos , Atletas , Traumatismos em Atletas/psicologia , Concussão Encefálica/psicologia , Lesões Encefálicas Traumáticas/psicologia , Tomada de Decisões , Humanos , Volta ao Esporte/psicologia , Esportes
13.
J Trauma ; 69(2): 270-4, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20699735

RESUMO

BACKGROUND: The appropriate timing of cranioplasty after decompressive craniectomy for trauma is unknown. Potential benefits of delayed intervention (>6 weeks) for reducing the risk of infection must be balanced by persistent altered cerebrospinal fluid dynamics leading to hydrocephalus. We reviewed our recent 5-year experience in an effort to improve patient throughput and develop a rational decision making plan. METHODS: A 5-year query (2003-2007) of our level I neurotrauma database. From 2,400 head injuries, we performed a total of 350 craniotomies. Of the 350 patients who underwent craniotomy for trauma, 70 patients (20%) underwent decompressive craniectomy requiring cranioplasty. Timing of cranioplasty, cranioplasty material, postoperative infections, and incidence of hydrocephalus were evaluated with logistic regression to study potential associations between complications and timing, adjusted for risk factors. RESULTS: No specific time frame was predictive of hydrocephalus or infection, and logistic regression failed to identify significant predictors among the collected variables. CONCLUSION: In our experience, the prior practice of delayed cranioplasty (3-6 months postdecompressive craniectomy), requiring repeat hospital admission, does not seem to lower postcranioplasty infection rates nor the need for cerebrospinal fluid diversion procedures. Our current practice emphasizes cranioplasty during the initial hospital admission, as soon as there is resolution on computed tomography scan of brain swelling outside of the cranial vault with concurrent clinical examination. This occurs as early as 2 weeks postcraniectomy and should lower the overall cost of care by eliminating the need for additional hospital admissions.


Assuntos
Traumatismos Craniocerebrais/cirurgia , Craniectomia Descompressiva/métodos , Hipertensão Intracraniana/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Crânio/cirurgia , Adulto , Traumatismos Craniocerebrais/complicações , Traumatismos Craniocerebrais/diagnóstico , Bases de Dados Factuais , Craniectomia Descompressiva/efeitos adversos , Feminino , Escala de Coma de Glasgow , Humanos , Escala de Gravidade do Ferimento , Hipertensão Intracraniana/etiologia , Hipertensão Intracraniana/mortalidade , Masculino , Pessoa de Meia-Idade , Qualidade de Vida , Procedimentos de Cirurgia Plástica/efeitos adversos , Estudos Retrospectivos , Medição de Risco , Taxa de Sobrevida , Resultado do Tratamento , Adulto Jovem
14.
Early Hum Dev ; 148: 105119, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32679473

RESUMO

BACKGROUND: Infants with prenatal substance exposure are at increased risk for developmental problems, with self-regulatory challenges being some of the most pronounced. The current study aimed to investigate the extent to which prenatal substance exposure (alcohol, opioids) impacts infant self-regulation during a relational stressor and the association between self-regulation and infant affect. METHODS: Participants were 100 mother-child dyads recruited prenatally (Mean = 23.8 gestational weeks) and completed the Still Face Paradigm (SFP) when infants were 5 to 8 months of age (Mean = 6.9 months) as part of an ENRICH prospective birth cohort study. Based on prospective repeated assessment of maternal substance use in pregnancy, infants were grouped into: 1) Unexposed controls; 2) Alcohol-exposed; 3) Opioid-exposed due to maternal use of medications for opioid use disorder (MOUD) with or without other opioids; 4) MOUD and alcohol. Infant stress reactivity (negative affect) and self-regulation were assessed during the validated 5-episode SFP. Mixed effects linear models were used to analyze differences in the percent of self-regulation and percent of negative affect among the study groups across SFP episodes, as well as the group-by-self-regulation interaction with respect to infant negative affect. RESULTS: The MOUD+Alcohol group demonstrated significantly lower self-regulation at baseline compared to controls (p < 0.05). There was a significant group-by-self-regulation interaction (p = 0.028). Higher self-regulation was associated with lower negative affect across SFP episodes in the MOUD+Alcohol group (p = 0.025) but not other groups. CONCLUSION: Self-regulation skills are particularly important for emotional modulation in infants with prenatal polysubstance exposure, highlighting the development of these skills as a promising intervention target.


Assuntos
Alcoolismo/complicações , Emoções , Transtornos Relacionados ao Uso de Opioides/complicações , Efeitos Tardios da Exposição Pré-Natal/induzido quimicamente , Adulto , Alcoolismo/psicologia , Estudos de Casos e Controles , Feminino , Humanos , Lactente , Masculino , Comportamento Materno , Transtornos Relacionados ao Uso de Opioides/psicologia , Gravidez , Psicologia da Criança
15.
J Neuroinflammation ; 6: 2, 2009 Jan 08.
Artigo em Inglês | MEDLINE | ID: mdl-19133139

RESUMO

BACKGROUND: Complement represents a crucial mediator of neuroinflammation and neurodegeneration after traumatic brain injury. The role of the terminal complement activation pathway, leading to generation of the membrane attack complex (MAC), has not been thoroughly investigated. CD59 is the major regulator of MAC formation and represents an essential protector from homologous cell injury after complement activation in the injured brain. METHODS: Mice deleted in the Cd59a gene (CD59a-/-) and wild-type littermates (n = 60) were subjected to focal closed head injury. Sham-operated (n = 60) and normal untreated mice (n = 14) served as negative controls. The posttraumatic neurological impairment was assessed for up to one week after trauma, using a standardized Neurological Severity Score (NSS). The extent of neuronal cell death was determined by serum levels of neuron-specific enolase (NSE) and by staining of brain tissue sections in TUNEL technique. The expression profiles of pro-apoptotic (Fas, FasL, Bax) and anti-apoptotic (Bcl-2) mediators were determined at the gene and protein level by real-time RT-PCR and Western blot, respectively. RESULTS: Clinically, the brain-injured CD59a-/- mice showed a significantly impaired neurological outcome within 7 days, as determined by a higher NSS, compared to wild-type controls. The NSE serum levels, an indirect marker of neuronal cell death, were significantly elevated in CD59a-/- mice at 4 h and 24 h after trauma, compared to wild-type littermates. At the tissue level, increased neuronal cell death and brain tissue destruction was detected by TUNEL histochemistry in CD59a-/- mice within 24 hours to 7 days after head trauma. The analysis of brain homogenates for potential mediators and regulators of cell death other than the complement MAC (Fas, FasL, Bax, Bcl-2) revealed no difference in gene expression and protein levels between CD59a-/- and wild-type mice. CONCLUSION: These data emphasize an important role of CD59 in mediating protection from secondary neuronal cell death and further underscore the key role of the terminal complement pathway in the pathophysiology of traumatic brain injury. The exact mechanisms of complement MAC-induced secondary neuronal cell death after head injury require further investigation.


Assuntos
Lesões Encefálicas/metabolismo , Lesões Encefálicas/patologia , Encéfalo/metabolismo , Encéfalo/patologia , Antígenos CD59/metabolismo , Animais , Apoptose , Antígenos CD59/genética , Complexo de Ataque à Membrana do Sistema Complemento/metabolismo , Doenças Desmielinizantes/patologia , Modelos Animais de Doenças , Proteína Ligante Fas/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , Neurônios/metabolismo , Neurônios/patologia , Fosfopiruvato Hidratase/metabolismo , Proteínas Proto-Oncogênicas c-bcl-2/metabolismo , RNA Mensageiro/metabolismo , Proteína X Associada a bcl-2/metabolismo , Receptor fas/metabolismo
16.
Crit Care ; 13(3): 215, 2009.
Artigo em Inglês | MEDLINE | ID: mdl-19638180

RESUMO

Severe burn injury remains a major burden on patients and healthcare systems. Following severe burns, the injured tissues mount a local inflammatory response aiming to restore homeostasis. With excessive burn load, the immune response becomes disproportionate and patients may develop an overshooting systemic inflammatory response, compromising multiple physiological barriers in the lung, kidney, liver, and brain. If the blood-brain barrier is breached, systemic inflammatory molecules and phagocytes readily enter the brain and activate sessile cells of the central nervous system. Copious amounts of reactive oxygen species, reactive nitrogen species, proteases, cytokines/chemokines, and complement proteins are being released by these inflammatory cells, resulting in additional neuronal damage and life-threatening cerebral edema. Despite the correlation between cerebral complications in severe burn victims with mortality, burn-induced neuroinflammation continues to fly under the radar as an underestimated entity in the critically ill burn patient. In this paper, we illustrate the molecular events leading to blood-brain barrier breakdown, with a focus on the subsequent neuroinflammatory changes leading to cerebral edema in patients with severe burns.


Assuntos
Barreira Hematoencefálica/fisiopatologia , Edema Encefálico/etiologia , Edema Encefálico/fisiopatologia , Queimaduras/complicações , Encefalite/etiologia , Encefalite/fisiopatologia , Biomarcadores/metabolismo , Barreira Hematoencefálica/imunologia , Edema Encefálico/imunologia , Edema Encefálico/psicologia , Queimaduras/imunologia , Encefalite/imunologia , Encefalite/psicologia , Humanos
17.
Front Behav Neurosci ; 13: 16, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30853903

RESUMO

Although interventions that promote child-supportive parenting for children have been shown to positively impact caregiving behaviors as well as child behavioral and neurobiological functioning, less is known about which aspects of maternal brain functioning are affected by such interventions. In the present study, we conducted a preliminary evaluation of the impact of the Filming Interactions to Nurture Development (FIND) video coaching program on mothers with at least one child age four or younger. We employed a waitlist control design with pre-post data. Compared to mothers in the control condition (n = 16), mothers who received FIND (n = 16) showed changes in neural measures of inhibitory control and behavioral measures of parenting self-evaluation during a series of functional neuroimaging tasks. Specifically, we found a group by time interaction in clusters in the left inferior frontal gyrus (IFG) and insula for the Correct Stop > Correct Go contrast of the stop signal task (SST), where FIND increased brain activity associated with inhibitory control compared to mothers in the control condition; and FIND increased mothers' endorsement of child-supportive parenting traits in the parenting self-evaluation task (PSET). Exploratory moderators, study limitations, and the implications of these findings for strength-based parenting programs are discussed.

18.
Appl Neuropsychol Child ; 8(4): 366-382, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30265572

RESUMO

Adolescence is a time of heightened neural plasticity. Many brain networks show protracted development through this period, such as those underlying inhibitory control (IC), a neurocognitive skill implicated in risk-taking and therefore relevant to public health. Although IC appears to be trainable in adults and young children, whether and how IC may be malleable during adolescence is not fully understood. In this pilot RCT, we tested the effects of a school-based IC training paradigm (versus active control) on IC performance and neural function in adolescents (N = 19) aged 15 to 17 recruited from a low-income school district. We also examined the extent to which training effects transferred to a nontrained IC task and real-world risk behavior, as well as potential moderation effects by early adversity exposure. Training altered brain function related to attention during IC preparation and implementation, though it did not alter IC performance in the training group compared to the control group. There was limited evidence of training transfer. Results have implications for translational neuroscience research in adolescents.


Assuntos
Comportamento do Adolescente/fisiologia , Atenção/fisiologia , Função Executiva/fisiologia , Inibição Psicológica , Plasticidade Neuronal/fisiologia , Prática Psicológica , Assunção de Riscos , Autocontrole , Transferência de Experiência/fisiologia , Adolescente , Educação Inclusiva/métodos , Humanos , Projetos Piloto , Instituições Acadêmicas , Resultado do Tratamento
19.
Mol Med ; 14(11-12): 731-40, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18769636

RESUMO

Traumatic brain injury (TBI) represents a major health care problem and a significant socioeconomic challenge worldwide. In the United States alone, approximately 1.5 million patients are affected each year, and the mortality of severe TBI remains as high as 35%-40%. These statistics underline the urgent need for efficient treatment modalities to improve posttraumatic morbidity and mortality. Despite advances in basic and clinical research as well as improved neurological intensive care in recent years, no specific pharmacological therapy for TBI is available that would improve the outcome of these patients. Understanding of the cellular and molecular mechanisms underlying the pathophysiological events after TBI has resulted in the identification of new potential therapeutic targets. Nevertheless, the extrapolation from basic research data to clinical application in TBI patients has invariably failed, and results from prospective clinical trials are disappointing. We review the published prospective clinical trials on pharmacological treatment modalities for TBI patients and outline future promising therapeutic avenues in the field.


Assuntos
Lesões Encefálicas/tratamento farmacológico , Corticosteroides/uso terapêutico , Animais , Lesões Encefálicas/metabolismo , Lesões Encefálicas/fisiopatologia , Ensaios Clínicos como Assunto , Ciclosporina/uso terapêutico , Humanos , Modelos Biológicos , Ácidos Pipecólicos/uso terapêutico , Progesterona/uso terapêutico , Receptores de N-Metil-D-Aspartato/antagonistas & inibidores
20.
Soc Cogn Affect Neurosci ; 13(5): 535-545, 2018 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-29718429

RESUMO

In this study, we utilized a novel fMRI paradigm to examine the behavioral and neural correlates of parenting self-evaluation in a sample of mothers with at least one child under the age of 4 (N = 37). Prior self-report, behavioral and observational research document the implications of parenting self-evaluations for parent well-being and caregiving behavior; however, relatively little is known about the neural circuitry underlying these self-referential processes and to what extent they are influenced by caregiving experience. Although neuroimaging paradigms indexing other aspects of parental function exist, this is the first to use functional neuroimaging to study parenting self-evaluation in a controlled laboratory setting. We found parenting self-evaluations elicited significantly greater activity across most cortical midline structures, including the medial prefrontal cortex compared to control evaluations; these findings converge with previous work on the neural underpinning of general trait self-evaluation. Notable differences by parity were observed in exploratory analyses: specifically, primiparous mothers endorsed a higher number of developmentally supportive traits, exhibited faster reaction times, and showed a greater difference in mPFC activity when making self-evaluations of developmentally supportive traits than of developmentally unsupportive traits, compared to multiparous mothers. Implications of these findings and study limitations are discussed.


Assuntos
Autoavaliação Diagnóstica , Mães/psicologia , Poder Familiar/psicologia , Autoeficácia , Adulto , Comportamento , Pré-Escolar , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Paridade , Córtex Pré-Frontal/diagnóstico por imagem , Córtex Pré-Frontal/fisiologia , Tempo de Reação/fisiologia , Fatores Socioeconômicos , Adulto Jovem
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