School bullying in children and adolescents with neurodevelopmental and psychiatric conditions: a systematic review and meta-analysis

BACKGROUND

Bullying is a common form of violence among children and adolescents. Young people with neurodevelopmental or psychiatric conditions might have an increased risk of bullying victimisation and perpetration. We aimed to assess the odds of bullying involvement and its association with mental health measures in these populations.

METHODS

In this systematic review and meta-analysis, we searched PubMed, ERIC, Psychology and Behavioural Sciences Collection, Web of Science Core Collection, PsycArticles, and PsycInfo databases from inception up to Aug 8, 2023, and included articles reporting data on bullying outcomes of current bullying (within the past year) among children and adolescents (aged 4-17 years) with a diagnosis of a neurodevelopmental or psychiatric condtion provided by a health professional. Bullying type was classified as traditional (physical, verbal, or relational) or as cyberbullying (intentional and repeated harm inflicted through electronic devices and social media), and bullying involvement was classified as victimisation, perpetration, and perpetration-victimisation. Mental health measures were collected and the associations with bullying involvement assessed. We used random-effects meta-analyses to estimate prevalence and odds ratios (ORs) for bullying involvement. Heterogeneity was assessed using the I2 statistic, and publication bias was tested with Egger's regression. This study is registered with PROSPERO, CRD42021235043.

FINDINGS

We included 212 studies in the meta-analysis. The total sample comprised 126 717 cases (mean age 12·34 years [SD 1·82], 37·6% girls) and 504 806 controls (12·5 years [SD 1·86], 47·6% girls). For traditional bullying, the pooled prevalence was 42·2% (95% CI 39·6-44·9) for victimisation, 24·4% (22·6-26·3) for perpetration, and 14·0% (11·4-17·1) for perpetration-victimisation. For cyberbullying, the prevalence was 21·8% (16·0-28·9) for victimisation, 19·6% (13·4-27·7) for perpetration, and 20·7% (8·4-42·6) for perpetration-victimisation. Compared with controls, young people with neurodevelopmental or psychiatric conditions were more likely to be involved in traditional and cyberbullying as a victim (OR 2·85 [95% CI 2·62-3·09] and 2·07 [1·63-2·61]), perpetrator (2·42 [2·20-2·66] and 1·91 [1·60-2·28]), and perpetrator-victim (3·66 [2·83-4·74] and 1·85 [1·05-3·28]). Bullying involvement was associated with higher scores in mental health measures in young people with neurodevelopmental or psychiatric conditions, particularly internalising symptoms and externalising symptoms.

INTERPRETATION

Our study underscores bullying involvement as a prevalent risk factor in young people with neurodevelopmental or psychiatric conditions that might add to their disease burden through its negative effects on mental health. Interventions targeting these vulnerable populations are warranted to improve their mental health and their future social integration.

FUNDING

Instituto de Salud Carlos III, Spanish Ministry of Science and Innovation, and Consorcio Centro de Investigación Biomédica en Red.

Eficacia de los tratamientos psicológicos para los comportamientos autolesivos suicidas y no suicidas en adolescentes

Los comportamientos autolesivos y suicidas en adolescentes, por su creciente prevalencia como por sus fatales consecuencias, son en nuestros días un problema de salud pública que requiere de intervenciones eficaces. Con el objetivo de dilucidar los tratamientos psicológicos que, hasta la fecha, mejor funcionan para reducir o eliminar estos comportamientos, se realizó una revisión de estudios de metaanálisis y revisiones sistemáticas en las bases de datos PsycArticles, PsycInfo y MEDLINE. Los criterios de elegibilidad establecidos permitieron la selección final de 10 registros. Los resultados mostraron una elevada heterogeneidad y un alcance limitado de los tratamientos psicológicos con tamaños del efecto de pequeños a moderados tanto para las conductas autolesivas, como para la ideación suicida, la suicidabilidad y especialmente para la intención suicida. Estos efectos tendían a debilitarse o desaparecer en el medio y largo plazo. La Terapia Dialéctica Conductual (TDC) resultó ser comparativamente la que mejores resultados obtuvo de las intervenciones analizadas. El alcance restringido de los resultados y las importantes limitaciones metodológicas halladas alertan de la necesidad de más investigación, así como del futuro diseño de intervenciones específicas para este tipo de problemas.

A Role for mir-26a in Stress: A Potential sEV Biomarker and Modulator of Excitatory Neurotransmission

Stress is a widespread problem in today’s societies, having important consequences on brain function. Among the plethora of mechanisms involved in the stress response at the molecular level, the role of microRNAs (miRNAs) is beginning to be recognized. The control of gene expression by these noncoding RNAs makes them essential regulators of neuronal and synaptic physiology, and alterations in their levels have been associated with pathological conditions and mental disorders. In particular, the excitatory (i.e., glutamate-mediated) neurotransmission is importantly affected by stress. Here, we found that loss of miR-26a-5p (miR-26a henceforth) function in primary hippocampal neurons increased the frequency and amplitude of miniature excitatory currents, as well as the expression levels of the excitatory postsynaptic scaffolding protein PSD95. Incubation of primary hippocampal neurons with corticosterone downregulated miR-26a, an effect that mirrored our in vivo results, as miR-26a was downregulated in the hippocampus as well as in blood serum-derived small extracellular vesicles (sEVs) of rats exposed to two different stress paradigms by movement restriction (i.e., stress by restraint in cages or by complete immobilization in bags). Overall, these results suggest that miR-26a may be involved in the generalized stress response and that a stress-induced downregulation of miR-26a could have long-term effects on glutamate neurotransmission.

The relationships between father involvement and parental acceptance on the psychological adjustment of children and adolescents: The moderating effects of clinical status

This study analyzes how a child's clinical condition modifies the relationship of father involvement, parental (fathers and mothers) acceptance and the child´s psychological adjustment, including the internalizing and externalizing problems. The cohort studied was composed of 226 subjects (61.94% males) with a mean age of 14.08 years, of which 113 children were from an incidental clinical sample and 113 from the general population. Both groups were matched by sex, age and family status, and the data show that the same structure of parent-child relationships that predict the child´s psychological adjustment can be accepted for both the clinical and non-clinical groups of children. However, the intensity of the relationships between the variables father involvement, parental acceptance and the child´s outcomes differed in function of the child's clinical status. Specifically, in the clinically-referred sample compared to non-clinical sample father involvement had a stronger effect on the children´s internalizing (but not the externalizing) problems and on their global psychological adjustment via their perceived maternal acceptance. The role of father involvement in the family relationships of clinical children is discussed. This study provides important evidence to support the need for enhanced paternal participation in the intervention programs for families.

Dental pulp pluripotent-like stem cells (DPPSC), a new stem cell population with chromosomal stability and osteogenic capacity for biomaterials evaluation

Background

Biomaterials are widely used to regenerate or substitute bone tissue. In order to evaluate their potential use for clinical applications, these need to be tested and evaluated in vitro with cell culture models. Frequently, immortalized osteoblastic cell lines are used in these studies. However, their uncontrolled proliferation rate, phenotypic changes or aberrations in mitotic processes limits their use in long-term investigations. Recently, we described a new pluripotent-like subpopulation of dental pulp stem cells derived from the third molars (DPPSC) that shows genetic stability and shares some pluripotent characteristics with embryonic stem cells. In this study we aim to describe the use of DPPSC to test biomaterials, since we believe that the biomaterial cues will be more critical in order to enhance the differentiation of pluripotent stem cells.

Methods

The capacity of DPPSC to differentiate into osteogenic lineage was compared with human sarcoma osteogenic cell line (SAOS-2). Collagen and titanium were used to assess the cell behavior in commonly used biomaterials. The analyses were performed by flow cytometry, alkaline phosphatase and mineralization stains, RT-PCR, immunohistochemistry, scanning electron microscopy, Western blot and enzymatic activity. Moreover, the genetic stability was evaluated and compared before and after differentiation by short-comparative genomic hybridization (sCGH).

Results

DPPSC showed excellent differentiation into osteogenic lineages expressing bone-related markers similar to SAOS-2. When cells were cultured on biomaterials, DPPSC showed higher initial adhesion levels. Nevertheless, their osteogenic differentiation showed similar trend among both cell types. Interestingly, only DPPSC maintained a normal chromosomal dosage before and after differentiation on 2D monolayer and on biomaterials.

Conclusions

Taken together, these results promote the use of DPPSC as a new pluripotent-like cell model to evaluate the biocompatibility and the differentiation capacity of biomaterials used in bone regeneration.

Electronic supplementary material

The online version of this article (doi:10.1186/s12860-017-0137-9) contains supplementary material, which is available to authorized users.