Exercise improves alveolar bone loss and the inflammatory profile of periodontal disease / El ejercicio mejora la pérdida de hueso alveolar y el perfil inflamatorio de la enfermedad periodontal / O exercício melhora a perda de osso alveolar e o perfil inflamatório da doença periodontal

ABSTRACT Periodontal disease (PD) is an inflammatory oral disease and alveolar bone loss is the most important sign of PD. However, the effects of exercise on inflammatory factors and alveolar bone loss in individuals with PD have been little studied. This meta-analysis assesses the effect of physical exercise on alveolar bone loss (ABL) and the inflammatory profile of PD in animal models. Relevant studies published through July 2020 in PubMed, Medline, Embase and Web of Science were searched after developing a PICOS statement. Quality assessment and risk of bias were analyzed according to the SYRCLE protocol. A total of 52 references were retrieved, 4 of which were considered eligible for inclusion. A total of thirty-four male Wistar rats from the included studies were evaluated for alveolar bone loss and assessed for inflammatory profile. The results indicated that physical exercise could reduce alveolar bone loss (95% CI -2.85 to -0.82, p = 0.002) and the pro-inflammatory tumor necrosis factor-α (TNF-α) in serum or gingival tissue (95% CI -0.45 to -0.24, p < 0.00001). Inversely, exercise increased anti-inflammatory interleukin-10 (IL-10) in serum or gingival tissue (95% CI 0.28 to 0.69, p < 0.00001). However, one study reported a negative result in the expression of TNF-α and IL-10. Current evidence indicates that physical exercise contributes to ameliorate PD by reducing alveolar bone loss and inflammation in animal PD models, which suggests that moderate exercise can be implemented in clinical practice to maintain periodontal health. Level of Evidence I; Systematic Review and Meta-analysis

RESUMEN La enfermedad periodontal (EP) es una enfermedad inflamatoria oral y la pérdida de hueso alveolar es su signo más importante. Sin embargo, los efectos del ejercicio sobre los factores inflamatorios y la pérdida ósea alveolar en individuos con EP han sido poco estudiados. Este meta-análisis evalúa el efecto del ejercicio sobre la pérdida ósea alveolar (POA) y el perfil inflamatorio de la EP en modelos animales. Se llevaron a cabo estudios relevantes publicados hasta julio de 2020 en PubMed, Medline, Embase y Web of Science tras desarrollar la investigación con el método PICO. La evaluación de la calidad y el riesgo de sesgo se analizaron según el protocolo SYRCLE. Se recuperó un total de 52 referencias, cuatro de las cuales se consideraron elegibles para su inclusión. En un total de 34 ratas Wistar macho de los estudios incluidos se evaluó la pérdida de hueso alveolar y el perfil inflamatorio. Los resultados indicaron que el ejercicio puede reducir la pérdida de hueso alveolar (IC del 95%: -2,85 a -0,82; p = 0,002) y el factor de necrosis tumoral proinflamatorio-α (TNFα) en suero o tejido gingival (IC del 95%: -0,45 a -0,24; p < 0,00001). Por el contrario, el ejercicio aumentó la interleucina-10 (IL-10) antiinflamatoria en el suero o en el tejido gingival (IC del 95%: 0,28 a 0,69; p < 0,00001). Sin embargo, un estudio informó de un resultado negativo en la expresión de TNFα e IL-10. Las pruebas actuales indican que el ejercicio contribuye a mejorar la EP al reducir la pérdida de hueso alveolar y la inflamación en modelos animales de EP, lo que sugiere que se puede implementar el ejercicio moderado en la práctica clínica para mantener la salud periodontal. Nivel de Evidencia I; Revisión Sistemática y Meta-análisis.

RESUMO A doença periodontal (DP) é uma doença inflamatória oral e a perda óssea alveolar é seu sinal mais importante. No entanto, os efeitos do exercício sobre os fatores inflamatórios e a perda óssea alveolar em indivíduos com DP têm sido pouco estudados. Esta metanálise avalia o efeito do exercício físico sobre a perda óssea alveolar (POA) e o perfil inflamatório da DP em modelos animais. Estudos relevantes publicados até julho de 2020 em PubMed, Medline, Embase e Web of Science foram pesquisados depois de desenvolver a pesquisa com o método PICO. A avaliação da qualidade e o risco de viés foram analisados de acordo com o protocolo SYRCLE. Um total de 52 referências foram recuperadas, quatro das quais foram consideradas elegíveis para inclusão. Um total de 34 ratos Wistar machos dos estudos incluídos foram avaliados quanto à perda de osso alveolar e avaliados quanto ao perfil inflamatório. Os resultados indicaram que o exercício físico pode reduzir a perda de osso alveolar (IC 95% -2,85 a -0,82, p = 0,002) e o fator de necrose tumoral pró-inflamatório-α (TNFα) no soro ou tecido gengival (IC 95% -0,45 a -0,24, p < 0,00001). Inversamente, o exercício aumentou a interleucina-10 anti-inflamatória (IL-10) no soro ou no tecido gengival (IC 95% 0,28 a 0,69, p < 0,00001). Contudo, um estudo relatou resultado negativo na expressão de TNFα e IL-10. As evidências atuais indicam que o exercício físico contribui para melhorar a DP, reduzindo a perda de osso alveolar e a inflamação em modelos animais de DP, o que sugere que o exercício moderado pode ser implementado na prática clínica para manter a saúde periodontal. Nível de Evidência I; Revisão Sistemática e Metanálise.

A Longitudinal Study of the Effects of Bed-Sharing Experience in Infancy on Sleep Outcomes at 2 Years Old.

OBJECTIVE: To assess the effects of bed-sharing experiences in infancy on sleep patterns and sleep problems at 2 years of age. STUDY DESIGN: A total of 1564 children from an ongoing Shanghai Maternal-Child Pairs Cohort were included. Bed-sharing experiences were collected when children were 2, 6, and 24 months old via caregiver-completed questionnaires (whether caregivers shared a bed with children during the night), and children's bed-sharing experiences were classified as follows: no bed-sharing, early-only bed-sharing, late-onset bed-sharing, and persistent bed-sharing. Sleep outcomes at month 24 were assessed using the Brief Infant Sleep Questionnaire. Sleep patterns and problems were compared among the 4 types of bed-sharing experiences. RESULTS: Of the 1564 infants, 10.10% had no bed-sharing, 18.35% had early-only, 27.94% had late-onset, and 43.61% had persistent bed-sharing. Compared with children with no bed-sharing, children with late-onset and persistent bed-sharing had shorter nighttime sleep durations and longer daytime sleep durations (P < .05) and were more likely to snore (aOR 1.87 [95% CI 1.25-2.79]; aOR 1.68 [95% CI 1.14-2.47]) and have sleep onset difficulty (aOR 2.06 [95% CI 1.37-3.09]; aOR 2.07 [95% CI 1.41-3.05]). However, caregivers of infants in the late-onset and persistent bed-sharing groups perceived less problematic sleep (aOR 0.38 [95% CI 0.26-0.56] and aOR 0.40 [95% CI 0.28-0.58]). CONCLUSIONS: Bed-sharing is a common experience among Chinese children. Although bed-sharing may reduce caregivers' perception of children's problematic sleep, late-onset or persistent bed-sharing in infancy is associated with sleep problems at 2 years of age.

Microsurgical anatomy of language.

The localizationist model, which focused on classical cortical areas such as Broca's and Wernicke's, can no longer explain how language processing works. Over recent years, several studies have revealed new language-related cortical and subcortical areas, resulting in a transition from localizationist concepts to a hodotopical model. These studies have described language processing as an extensive and complex network of multiple interconnected cortical areas and subcortical pathways, differing from the classical circuit described by the localizationist perspective. The hodotopical model was made possible by a paradigm shift in the treatment of cerebral tumors, especially low-grade gliomas: total or subtotal tumor resections with cortical and subcortical mapping on awake patients have become the gold standard treatment for lesions located in the dominant hemisphere. In this article, we review current understating of the microsurgical anatomy of language.

Hippocampal vascularization: Proposal for a new classification.

BACKGROUND: Anatomy of the hippocampal arterial supply is key to successful surgeries in this area. The goal of the current study is to present the results we obtained from our microsurgical dissections of the temporal lobe and to propose a new classification for the hippocampal arteries (HAs). METHODS: Fifty-six brain hemispheres were analyzed. All dissections in this study were made using 3-40× at the surgical microscope. RESULTS: The hippocampal arterial vasculature can be divided into six groups, according to their frequencies: Group A: mixed arterial vasculature originating from the anterior choroidal artery anterior choroidal artery, posterior cerebral artery (PCA), anterior infratemporal artery (AIA), and splenic artery (SA). Group B: Main origin at the temporal branches - main inferotemporal trunk, middle inferotemporal artery, posterior inferotemporal artery, AIA, or main branch of PCA. Group C: AIA as the main branch of the hippocampus. Group D: HAs originating from the main branch of PCA. Group E: A single hippocampal artery with the origin at the main branch of PCA. This single artery covered all of the structure and is named Ushimura's artery. Group F: The hippocampal vessels arose exclusively from the parieto-occipital artery, calcarine artery (CA), and the SA. CONCLUSION: This study proposes a new classification for the hippocampal vascularization, according to the origin of HAs. One of the groups has not yet been described in the literature - in which the HAs arise from the parieto-occipital artery, SA, and CA.

Y chromosomal STR polymorphism in northern Chinese populations.

Y chromosomal STRs show sufficient variability among individduals in a population and a high degree of geographical differentiation, such that their polymorphic character makes them especially suited for population genetic studies. To investígate the polymorphism of a set of 17 Y-STR loci in northern China, we genotyped the 17 Y chromosomal STR loci in a population sample of 377 unrelated males from eight ethnic populations in northern China. We calculated the haplotype frequencies, Rst value and carried out the analysis of molecular variance (AMOVA). We then drew the multidimensional scaling analysis (MDS) plot and phylogenetic tree based on the Rst value. All populations showed a high level of haplotype diversity, with low inter-population variance as measured by an analysis of molecular variance. However, the genetic distances were significant when the eight populations were compared to other populations. By MDS and the phylogenetic tree, we found that the eight populations had a close relationship and Xibo had a northeast origination.

Y Chromosomal STR Polymorphism in Northern Chinese Populations

Y chromosomal STRs show sufficient variability among individduals in a population and a high degree of geographical differentiation, such that their polymorphic character makes them especially suited for population genetic studies. To investígate the polymorphism of a set of 17 Y-STR loci in northern China, we genotyped the 17 Y chromosomal STR loci in a population sample of 377 unrelated males from eight ethnic populations in northern China. We calculated the haplotype frequencies, Rst value and carried out the analysis of molecular variance (AMOVA). We then drew the multidimensional scaling analysis (MDS) plot and phylogenetic tree based on the Rst value. All populations showed a high level of haplotype diversity, with low inter-population variance as measured by an analysis of molecular variance. However, the genetic distances were significant when the eight populations were compared to other populations. By MDS and the phylogenetic tree, we found that the eight populations had a close relationship and Xibo had a northeast origination.