ELIZABETH SHEPHARD
Projetos de Pesquisa
Unidades Organizacionais
LIM/23 - Laboratório de Psicopatologia e Terapêutica Psiquiátrica, Hospital das Clínicas, Faculdade de Medicina
24 resultados
Resultados de Busca
Agora exibindo 1 - 10 de 24
- Toward a neurocircuit-based taxonomy to guide treatment of obsessive-compulsive disorder(2021) SHEPHARD, Elizabeth; STERN, Emily R.; HEUVEL, Odile A. van den; COSTA, Daniel L. C.; BATISTUZZO, Marcelo C.; GODOY, Priscilla B. G.; LOPES, Antonio C.; BRUNONI, Andre R.; HOEXTER, Marcelo Q.; SHAVITT, Roseli G.; REDDY, Y. C. Janardhan; LOCHNER, Christine; STEIN, Dan J.; SIMPSON, H. Blair; MIGUEL, Euripedes C.An important challenge in mental health research is to translate findings from cognitive neuroscience and neuroimaging research into effective treatments that target the neurobiological alterations involved in psychiatric symptoms. To address this challenge, in this review we propose a heuristic neurocircuit-based taxonomy to guide the treatment of obsessive-compulsive disorder (OCD). We do this by integrating information from several sources. First, we provide case vignettes in which patients with OCD describe their symptoms and discuss different clinical profiles in the phenotypic expression of the condition. Second, we link variations in these clinical profiles to underlying neurocircuit dysfunctions, drawing on findings from neuropsychological and neuroimaging studies in OCD. Third, we consider behavioral, pharmacological, and neuromodulatory treatments that could target those specific neurocircuit dysfunctions. Finally, we suggest methods of testing this neurocircuit-based taxonomy as well as important limitations to this approach that should be considered in future research.
- A randomized controlled trial testing the efficacy of a Nurse Home Visiting Program for Pregnant Adolescents(2021) FATORI, Daniel; ZUCCOLO, Pedro Fonseca; SHEPHARD, Elizabeth; BRENTANI, Helena; MATIJASEVICH, Alicia; FERRARO, Alexandre Archanjo; FRACOLLI, Lislaine Aparecida; CHIESA, Anna Maria; LECKMAN, James; MIGUEL, Euripedes Constantino; POLANCZYK, Guilherme V.To test the efficacy of a nurse home visiting program (HVP) on child development, maternal and environmental outcomes in the first years of life. We conducted a randomized controlled trial to test the efficacy of Primeiros Lacos, a nurse HVP for adolescent mothers living in a poor urban area of SAo Paulo, Brazil. Eighty adolescent mothers were included and randomized to receive either Primeiros Lacos (intervention group, n=40) or healthcare as usual (control group, n=40). Primeiros Lacos is a home visiting intervention delivered by trained nurses that starts during the first 16 weeks of pregnancy and continues to the child's age of 24 months. Participants were assessed by blind interviewers at 8-16 weeks of pregnancy (baseline), 30 weeks of pregnancy, and 3, 6, 12, and 24 months of child's age. We assessed oscillatory power in the mid-range alpha frequency via electroencephalography when the children were aged 6 months. Child development was measured by the Bayley Scales of Infant Development Third Edition (BSID-III). Weight and length were measured by trained professionals and anthropometric indexes were calculated. The home environment and maternal interaction with the child was measured by the Home Observation and Measurement of the Environment. Generalized estimating equation models were used to examine intervention effects on the trajectories of outcomes. Standardized effect sizes (Cohen's d) were calculated using marginal means from endpoint assessments of all outcomes. The trial was registered at clinicaltrial.gov: NCT02807818. Our analyses showed significant positive effects of the intervention on child expressive language development (coefficient=0.89, 95% CI [0.18, 1.61], p=0.014), maternal emotional/verbal responsivity (coefficient=0.97, 95% CI [0.37, 1.58], p=0.002), and opportunities for variety in daily stimulation (coefficient=0.37, 95% CI [0.09, 0.66], p=0.009). Standardized effect sizes of the intervention were small to moderate. Primeiros Lacos is a promising intervention to promote child development and to improve the home environment of low-income adolescent mothers. However, considering the limitations of our study, future studies should be conducted to assess Primeiros Lacos potential to benefit this population.Clinical Trial Registration: The study was registered at clinicaltrial.gov (Registration date: 21/06/2016 and Registration number: NCT02807818).
- Effects of Maternal Psychopathology and Education Level on Neurocognitive Development in Infants of Adolescent Mothers Living in Poverty in Brazil(2019) SHEPHARD, Elizabeth; FATORI, Daniel; MAURO, Larissa Rezende; V, Mauro de Medeiros Filho; HOEXTER, Marcelo Q.; CHIESA, Anna M.; FRACOLLI, Lislaine A.; BRENTANI, Helena; FERRARO, Alexandre A.; III, Charles A. Nelson; MIGUEL, Euripedes C.; V, Guilherme PolanczykBACKGROUND: Adolescent motherhood remains common in developing countries and is associated with risk factors that adversely impact infant neurodevelopment, including poverty, low maternal education, and increased maternal psychopathology. Yet, no published work has assessed how these factors affect early brain development in developing countries. METHODS: This pilot study examined effects of maternal psychopathology and education on early neurocognitive development in a sample of adolescent mothers (N = 50, final n = 31) and their infants living in poverty in Sao Paulo, Brazil. Maternal symptoms of anxiety, depression, and attention-deficit/hyperactivity disorder and education level were assessed during pregnancy. Infant neurocognitive development was assessed at 6 months of age, with oscillatory power and functional connectivity in the theta (4-6 Hz), alpha (6-9 Hz), and gamma (30-50 Hz) frequencies derived from resting-state electroencephalography; temperament (negative affect, attention, and regulation); and cognitive, language, and motor skills. Cluster-based permutation testing and graph-theoretical methods were used to identify alterations in oscillatory power and connectivity that were associated with maternal psychopathology and education. Correlations between power and connectivity alterations were examined in relation to infants' overt cognitive behavioral abilities. RESULTS: Increased maternal anxiety and lower maternal education were associated with weaker oscillatory connectivity in alpha-range networks. Infants with the weakest connectivity in the alpha network associated with maternal anxiety also showed the lowest cognitive ability. Greater maternal anxiety and attention-deficit/hyperactivity disorder were associated with increased absolute and relative theta power. CONCLUSIONS: Our findings highlight the importance of addressing maternal psychopathology and improving education in poor adolescent mothers to prevent negative effects on infant neurodevelopment.
- Promoting mother-infant relationships and underlying neural correlates: Results from a randomized controlled trial of a home-visiting program for adolescent mothers in Brazil(2021) ALARCAO, Fernanda Speggiorin Pereira; SHEPHARD, Elizabeth; FATORI, Daniel; AMAVEL, Renata; CHIESA, Anna; FRACOLLI, Lislaine; MATIJASEVICH, Alicia; BRENTANI, Helena; NELSON, Charles A.; LECKMAN, James; MIGUEL, Euripedes Constantino; V, Guilherme PolanczykPoverty and teenage pregnancy are common in low-and-middle-income countries and can impede the development of healthy parent-child relationships. This study aimed to test whether a home-visiting intervention could improve early attachment relationships between adolescent mothers and their infants living in poverty in Brazil. Analyses were conducted on secondary outcomes from a randomized controlled trial (NCT0280718) testing the efficacy of a home-visiting program, Primeiros Lacos, on adolescent mothers' health and parenting skills and their infants' development. Pregnant youth were randomized to intervention (n = 40) or care-as-usual (CAU, n = 40) from the first trimester of pregnancy until infants were aged 24 months. Mother-infant attachment was coded during a mother-infant interaction when the infants were aged 12 months. Electrophysiological correlates of social processing (mean amplitude of the Nc component) were measured while infants viewed facial images of the mother and a stranger at age 6 months. Infants in the intervention group were more securely attached and more involved with their mothers than those receiving CAU at 12 months. Smaller Nc amplitudes to the mother's face at 6 months were associated with better social behavior at 12 months. Our findings indicate that the Primeiros Lacos Program is effective in enhancing the development of mother-infant attachment.
- Social communication therapy for children at risk for neurodevelopmental difficulties: Protocol for a clinical trial(2022) GODOY, Priscilla B. G.; SHEPHARD, Elizabeth; ARGEU, Adriana; SILVEIRA, Leticia R.; SALOMONE, Erica; ALDRED, Catherine; GREEN, Jonathan; V, Guilherme Polanczyk; MATIJASEVICH, AliciaExposure to adverse environments are risk factors for neurodevelopmental problems in childhood. Children exposed to such environments may benefit from interventions that target social communication abilities, since these are protective factors for healthy neurodevelopment. This randomized controlled trial will test the efficacy of Paediatric Autism Communication Therapy (PACT) in improving social communication development in young children at risk for neurodevelopmental difficulties living in poverty in Brazil. Participants will be 160 children aged 2-4 years with lower-than-average social communication abilities and their primary caregivers. Child-caregiver dyads will be recruited from public childhood education centers in impoverished urban regions of the city of Sao Paulo, Brazil. Lower-than-average social communication abilities will be defined by standard scores (<= 84) on the socialization and/or communication domains of the Vineland Adaptive Behavior Scales. Child-caregiver dyads will be randomized to receive 12 sessions of the PACT intervention (n = 80) or 5 months of community support as usual plus psychoeducation (n = 80). The primary outcome (parent-child interaction) and secondary outcomes (parent-reported social communication abilities and neurophysiological activity during a live social interaction) will be measured pre- and postintervention. This study may lead to new interventions for vulnerable young children in Brazil and better understanding of the neural mechanisms of PACT.
- A systematic review and meta-analysis of altered electrophysiological markers of performance monitoring in Obsessive-Compulsive Disorder (OCD), Gilles de la Tourette Syndrome (GTS), Attention-Deficit/Hyperactivity disorder (ADHD) and Autism(2021) BELLATO, Alessio; NORMAN, Luke; IDREES, Iman; OGAWA, Carolina Y.; WAITT, Alice; ZUCCOLO, Pedro F.; TYE, Charlotte; RADUA, Joaquim; GROOM, Madeleine J.; SHEPHARD, ElizabethAltered performance monitoring is implicated in obsessive-compulsive disorder (OCD), Gilles de la Tourette syndrome (GTS), attention-deficit/hyperactivity disorder (ADHD) and autism. We conducted a systematic review and meta-analysis of electrophysiological correlates of performance monitoring (error-related negativity, ERN; error positivity, Pe; feedback-related negativity, FRN; feedback-P3) in individuals with OCD, GTS, ADHD or autism compared to control participants, or associations between correlates and symptoms/traits of these con-ditions. Meta-analyses on 97 studies (5890 participants) showed increased ERN in OCD (Hedge's g = 0.54 [CIs:0.44,0.65]) and GTS (g = 0.99[CIs:0.05,1.93]). OCD also showed increased Pe (g = 0.51[CIs:0.21,0.81]) and FRN (g = 0.50[CIs:0.26,0.73]). ADHD and autism showed reduced ERN (ADHD: g=-0.47[CIs:-0.67,-0.26]; autism: g=-0.61[CIs:-1.10,-0.13]). ADHD also showed reduced Pe (g=-0.50[CIs:-0.69,-0.32]). These findings suggest overlap in electrophysiological markers of performance monitoring alterations in four common neuro-developmental conditions, with increased amplitudes of the markers in OCD and GTS and decreased amplitudes in ADHD and autism. Implications of these findings in terms of shared and distinct performance monitoring alterations across these neurodevelopmental conditions are discussed.
- Obsessive-Compulsive Disorder Treatment Based on Neurocircuits(2022) SHEPHARD, Elizabeth; STERN, Emily R.; MIGUEL, Euripedes C.Psychiatric disorders affect close to 30% of the global population and ac-count for more than 7% of the global burden of disease. To address this prob-lem, new treatment approaches are re-quired that target the heterogeneity of psychiatric conditions and their un-derlying neurobiological bases. In this article, we use obsessive-compulsive disorder (OCD) as an example to sum-marize recent conceptual work that has attempted to offer solutions to bet -ter understanding heterogeneity and improving effectiveness of psychiatric treatments. Specifically, we highlight hypothetical ""clinical profiles"" of OCD that are based on neurocognitive alter-ations (eg, dysregulated fear), which are underpinned by dysfunctions in specific neurocircuits (eg, hyperactive frontolimbic circuit function) and could be ameliorated with neurocircuit-based treatments. While this model of OCD is not yet ready for clinical use, this ap-proach to understanding OCD may be helpful for clinicians in understanding individual patients under their care and the mechanisms involved in different treatments for OCD. [Psychiatr Ann. 2022;52(4);152-156.]
- Exploring response inhibition and error monitoring in obsessive-compulsive disorder(2020) SILVEIRA, Vitor Portella; FRYDMAN, Ilana; FONTENELLE, Leonardo F.; MATTOS, Paulo; OLIVEIRA-SOUZA, Ricardo de; MOLL, Jorge; HOEXTER, Marcelo Queiroz; MIGUEL, Euripedes Constantino; MCLAUGHLIN, Nicole C. R.; SHEPHARD, Elizabeth; BATISTUZZO, Marcelo CamargoBehavioral evidence of impaired response inhibition (RI) and hyperactive error monitoring (EM) in obsessive-compulsive disorder (OCD) is inconsistent. Recent neuroimaging work suggests that EM plays a role in RI impairments in OCD, but this has rarely been investigated using behavioral measures. The aims of this study were to (1) compare RI and EM performance between adults with OCD and non-psychiatric controls (NPC) while investigating possible moderators, and (2) assess whether excessive EM influences RI in OCD. We compared RI and EM performance on the Stop-Signal Task (SST) between 92 adults with OCD and 65 NPC from two Brazilian sites. We used linear regression to investigate which variables (group, age, medication use, clinical symptomatology) influenced performance, as well as to examine possible associations between RI and EM. OCD and NPC did not differ in RI and EM. However, age moderated RI performance in OCD with a medium effect size, reflecting differential effects of age on RI between groups: age was positively associated with RI in OCD but not NPC. Further, OCD severity predicted EM with a medium to large effect size, suggesting that more symptomatic patients showed greater monitoring of their mistakes. Finally, group moderated the relationship between RI and EM with a small effect size. Our findings suggest that demographic factors may influence RI, whereas clinical factors may influence EM. Further, we found preliminary behavioral evidence to indicate that impaired RI and excessive EM are related in OCD.
- Children and adolescents' emotional problems during the COVID-19 pandemic in Brazil(2023) ZUCCOLO, Pedro Fonseca; CASELLA, Caio Borba; FATORI, Daniel; SHEPHARD, Elizabeth; SUGAYA, Luisa; GURGEL, Wagner; FARHAT, Luis Carlos; ARGEU, Adriana; TEIXEIRA, Monike; OTOCH, Luara; V, Guilherme PolanczykBrazil has been severely affected by the COVID-19 pandemic with one of the largest numbers of youth impacted by school closure globally. This longitudinal online survey assessed emotional problems in children and adolescents aged 5-17 years living in Brazil during the COVID-19 pandemic. Recruitment occurred between June to November 2020 and participants were invited for follow-up assessments every 15 days until June 2021. Participants were 5795 children and adolescents living across the country with mean age of 10.7 (SD 3.63) years at recruitment; 50.5% were boys and 69% of white ethnicity. Weighted prevalence rates of anxiety, depressive and total emotional symptoms at baseline were 29.7%, 36.1% and 36%, respectively. Longitudinal analysis included 3221 (55.6%) participants and revealed fluctuations in anxiety and depressive symptoms during one year follow-up, associated with periods of social mobility and mortality. Emotional problems significantly increased in July and September 2020 and decreased from December 2020 to February 2021 and then significantly increased in May 2021 relative to June 2020. Older age, feeling lonely, previous diagnosis of mental or neurodevelopmental disorder, previous exposure to traumatic events or psychological aggression, parental psychopathology, and sleeping less than 8/h a day were associated with increased rates of anxiety and depressive symptoms at baseline and over time. Food insecurity and less social contact with family and peers were associated with baseline anxiety and depressive symptoms, and lowest socio-economic strata, chronic disease requiring treatment and family members physically ill due to COVID-19 were associated with increasing rates over time. The pandemic severely affected youth, particularly those from vulnerable populations and in moments of increased mortality and decreased social mobility. Results underscore the need for allocation of resources to services and the continuous monitoring of mental health problems among children and adolescents.
- Double cone coil repetitive transcranial magnetic stimulation for severe obsessive-compulsive disorder after reversible cerebral vasoconstriction syndrome with intracerebral hemorrhage: a case report(2022) SILVEIRA, Julia Belizario; DAMIANO, Rodolfo Furlan; NETO, Emilio Abelama; GOMES, Raphael Neves dos Santos Mosqueira; KLEIN, Izio; BORRIONE, Lucas; SUDBRACK, Pedro; GENTIL, Andre Felix; SHEPHARD, Elizabeth; BRUNONI, Andre Russowski; MIGUEL, Euripedes Constantino; ECHEVARRIA, Marco Antonio Nocito
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