PAULA VILLELA NUNES
Projetos de Pesquisa
Unidades Organizacionais
LIM/21 - Laboratório de Neuroimagem em Psiquiatria, Hospital das Clínicas, Faculdade de Medicina
7 resultados
Resultados de Busca
Agora exibindo 1 - 7 de 7
- Neuropsychiatric symptoms in community-dwelling older Brazilians with mild cognitive impairment and dementia(2022) SUEMOTO, Claudia Kimie; NUNES, Paula Villela; LEITE, Renata Elaine Paraizo; FERRETTI-REBUSTINI, Renata Eloah de Lucena; PASQUALUCCI, Carlos Augusto; NITRINI, Ricardo; RODRIGUEZ, Roberta Diehl; GRINBERG, Lea Tenenholz; JACOB-FILHO, Wilson
- Increased levels of TAR DNA-binding protein 43 in the hippocampus of subjects with bipolar disorder: a postmortem study(2022) NASCIMENTO, Camila; V, Paula Nunes; KIM, Helena K.; LEITE, Renata E. P.; RODRIGUEZ, Roberta D.; OLIVEIRA, Katia Cristina De; BRENTANI, Helena P.; JACOB-FILHO, Wilson; NITRINI, Ricardo; PASQUALUCCI, Carlos A.; GRINBERG, Lea T.; SUEMOTO, Claudia K.; LAFER, BenyBipolar disorder shares symptoms and pathological pathways with other neurodegenerative diseases, including frontotemporal dementia (FTD). Since TAR DNA-binding protein 43 (TDP-43) is a neuropathological marker of frontotemporal dementia and it is involved in synaptic transmission, we explored the role of TDP-43 as a molecular feature of bipolar disorder (BD). Homogenates were acquired from frozen hippocampus of postmortem brains of bipolar disorder subjects. TDP-43 levels were quantified using an ELISA-sandwich method and compared between the postmortem brains of bipolar disorder subjects and age-matched control group. We found higher levels of TDP-43 protein in the hippocampus of BD (n = 15) subjects, when compared to controls (n = 15). We did not find associations of TDP-43 with age at death, postmortem interval, or age of disease onset. Our results suggest that protein TDP-43 may be potentially implicated in behavioral abnormalities seen in BD. Further investigation is needed to validate these findings and to examine the role of this protein during the disease course and mood states.
article 0 Citação(ões) na Scopus Cause of Death Determined by Full-body Autopsy in Neuropathologically Diagnosed Dementias The Biobank for Aging Studies of the University of Sao Paulo (BAS-USP), Brazil(2022) NEVES, Beatriz Astolfi; NUNES, Paula Villela; RODRIGUEZ, Roberta Diehl; HAIDAR, Atmis Medeiros; LEITE, Renata Elaine Paraizo; NASCIMENTO, Camila; PASQUALUCCI, Carlos Augusto; NITRINI, Ricardo; JACOB-FILHO, Wilson; LAFER, Beny; GRINBERG, Lea TenenholzObjective: This study aimed to compare causes of death in the most prevalent neuropathologically diagnosed dementias. Methods: We analyzed causes of death in a community-based cohort of participants aged 50 or older, submitted to full-body autopsy and a comprehensive neuropathologic examination of the brain. Individuals with Alzheimer disease (AD), vascular dementia (VaD), mixed dementia (AD+VaD), or dementia with Lewy bodies (DLBs) were compared with individuals with no dementia. Results: In a sample of 920 individuals, 456 had no dementia, 147 had AD, 120 had VaD, 53 had DLB, and 37 had AD+VaD. Pneumonia as the cause of death was more frequent in the AD (P= 0.023), AD+VaD (P= 0.046), and DLB (P= 0.043) groups. In addition, VaD (P= 0.041) and AD+VaD (P= 0.028) groups had a higher frequency of atherosclerosis as detected by full-body autopsy. Conclusion: Our findings highlight the importance of preventive measures regarding atherosclerosis and pneumonia in patients with dementia. Moreover, because of cognitive impairment, these patients may not fully account for symptoms to make early detection and diagnosis possible. These results confirm findings from previous studies that were based on clinical data, with added accuracy provided by neuropathologic diagnosis and full-body autopsy reports.- Mental Health of Medical Students Before and During COVID-19 Pandemic: a 3-Year Prospective Study(2022) PEREIRA, Mariana Berwerth; CASAGRANDE, Amanda Victoria; ALMEIDA, Beatriz Cantieri; NEVES, Beatriz Astolfi; SILVA, Thamires Clair Rodrigues Pereira da; MISKULIN, Fabricio Petermann Choueiri; PERISSOTTO, Thais; RIBEIZ, Salma Rose Imanari; NUNES, Paula VillelaBackground Very few studies prospectively analyzed medical students' mental health before and during the COVID-19 pandemic. This study aimed to prospectively evaluate mental health in medical students in 2018, 2019, and 2020 during the COVID-19 pandemic lockdown. Methods All students from first to fourth year were invited to participate in 2018. These students were also invited to participate in the same period in 2019 and 2020 (during the peak of the COVID-19 lockdown). The Self-Reporting Questionnaire (SRQ-20), created by the WHO to investigate 20 nonpsychotic psychiatric symptoms, was used to evaluate common mental disorders. The cut-off for relevant symptom severity for mental distress is seven (SRQ-20 >= 7). Results In the years 2018, 2019, and 2020, a total of 860 SRQ-20 questionnaires were completed. Overall, mean SRQ-20 scores were 8.2 +/- 4.6, and SRQ-20 >= 7 frequency was 60.5%. When comparing the years 2018, 2019, and 2020, no differences were found for either SRQ-20 scores (8.4 +/- 4.7, 8.2 +/- 4.6, and 7.8 +/- 4.4, respectively; p = 0.351) or SRQ-20 >= 7 frequency (62.2%, 60.9%, and 59.2%, respectively; p = 0.762). Conclusion In contrast to our initial hypothesis, stable results on mental health measures were found even during the 2020 COVID-19 lockdown. Maintenance of daily routines through distance learning and the continuation of adapted clerkship activities with strict safety measures could have contributed to these results. However, this study points to high overall levels of common mental disorders, especially among women. Further studies should be conducted to understand all the factors responsible for such stability, such as social and economic support, resilience, or even previous high levels of common mental disorders.
- Problematic Social Media Use and Its Relationship with Depression or Anxiety: A Systematic Review(2022) LOPES, Lucas Silva; VALENTINI, Joao Pedro; MONTEIRO, Thomas Hagemann; COSTACURTA, Marcelo Cunha de Freitas; SOARES, Luiza Oliveira Nicastro; TELFAR-BARNARD, Lucy; NUNES, Paula VillelaThere has been a notable increase in social media and Internet use over recent decades, not only for social interaction or entertainment, but also for working and meeting tools, as seen during the COVID-19 pandemic. A relationship between this usage and the development of mental illness is frequently hypothesized, but a few studies have empirical findings. This study is a systematic review of the relationship between social media use and depression or anxiety. Our Medline search yielded 1,747 papers. Our study found a strong and often bidirectional relationship between social media use and depression or anxiety. This relationship was frequently related to problematic social media use. No definite linear relationship was found between time spent using social media and depressive or anxious symptoms, but usually, the longer the time spent in that activity, the worse the outcomes. Factors related to problematic social media use were often different for men and women. Other variables may also play a role, such as nighttime-specific use, emotional involvement, and whether the individual behaves as an active or passive user. Evidence from this review provides a solid base for recommending cautious use of social media. Intense use and unhealthy habits, evidenced by addiction symptoms, may be problematic in less resilient individuals.
- Microcephaly measurement in adults and its association with clinical variables(2022) COSTA, Nicole Rezende da; MANCINE, Livia; SALVINI, Rogerio; TEIXEIRA, Juliana de Melo; RODRIGUEZ, Roberta Diehl; LEITE, Renata Elaine Paraizo; NASCIMENTO, Camila; PASQUALUCCI, Carlos Augusto; NITRINI, Ricardo; JACOB-FILHO, Wilson; LAFER, Beny; GRINBERG, Lea Tenenholz; SUEMOTO, Claudia Kimie; NUNES, Paula VillelaOBJECTIVE: To establish a microcephaly cut-off size in adults using head circumference as an indirect measure of brain size, as well as to explore factors associated with microcephaly via data mining. METHODS: In autopsy studies, head circumference was measured with an inelastic tape placed around the skull. Total brain volume was also directly measured. A linear regression was used to determine the association of head circumference with brain volume and clinical variables. Microcephaly was defined as head circumference that were two standard deviations below the mean of significant clinical variables. We further applied an association rule mining to find rules associating microcephaly with several sociodemographic and clinical variables. RESULTS: In our sample of 2,508 adults, the mean head circumference was 55.3 +/- 2.7cm. Head circumference was related to height, cerebral volume, and sex (p < 0.001 for all). Microcephaly was present in 4.7% of the sample (n = 119). Out of 34,355 association rules, we found significant relationships between microcephaly and a clinical dementia rating (CDR) > 0.5 with an informant questionnaire on cognitive decline in the elderly (IQCODE) = 3.4 (confidence: 100% and lift: 5.6), between microcephaly and a CDR > 0.5 with age over 70 years (confidence: 42% and lift: 2.4), and microcephaly and males (confidence: 68.1% and lift: 1.3). CONCLUSION: Head circumference was related to cerebral volume. Due to its low cost and easy use, head circumference can be used as a screening test for microcephaly, adjusting it for gender and height. Microcephaly was associated with dementia at old age.
- Neuropathology of depression in non-demented older adults: A large postmortem study of 741 individuals(2022) NUNES, Paula Villela; SUEMOTO, Claudia Kimie; RODRIGUEZ, Roberta Diehl; LEITE, Renata Elaine Paraizo; NASCIMENTO, Camila; PASQUALUCCI, Carlos Augusto; NITRINI, Ricardo; JACOB-FILHO, Wilson; GRINBERG, Lea T.; LAFER, BenyAssociations between age-related neuropathological lesions and adult-onset lifetime major depressive disorder (a-MDD), late-life MDD (LLD), or depressive symptoms close to death (DS) were examined in a large community sample of non-demented older adults. Seven hundred forty-one individuals (age at death = 72.2 +/- 11.7 years) from the Biobank for Aging Studies were analyzed. a-MDD was present in 54 (7.3%) participants, LLD in 80 (10.8%), and DS in 168 (22.7%). After adjustment for covariates and compared to controls, a-MDD, LDD and DS were associated with small vessel disease ( p = 0.039, p = 0.003, and p = 0.003 respectively); LLD, and DS were associated with brain infarcts ( p = 0.012, p = 0.018, respectively) and Lewy body disease ( p = 0.043, p = 0.002, respectively). DS was associated with betaamyloid plaque burden ( p = 0.027) and cerebral amyloid angiopathy ( p = 0.035) in cognitively normal individuals (Clinical Dementia Rating scale = 0). Vascular brain pathology was the strongest correlate of clinical depictions of depression in the absence of dementia, corroborating the vascular hypothesis of depression. Lewy body pathology underlay DS. An older adult with DS or LLD should be monitored for possible cognitive decline or neurodegenerative disorders.(c) 2022 Elsevier Inc. All rights reserved.