Italo Pretelli

Background: Anorexia nervosa (AN) is increasingly recognized as a multisystem disorder involving complex host–microbiota interactions, yet prospective pediatric studies with a comprehensive, longitudinal characterization of host–microbiota interactions remain scarce. Methods: In this prospective longitudinal study, 26 adolescents with severe AN were evaluated at hospital admission (T0), after one month (T1), and after three months of inpatient nutritional rehabilitation (T2). Gut microbiota composition was assessed by 16S rRNA sequencing and compared with healthy controls (HC) at the baseline; predicted functional profiling was performed using PICRUSt2. Serum and urinary biomarkers of intestinal barrier integrity and microbial metabolism, routine clinical and biochemical parameters, and psychometric scores (CDI-2, MASC-2) were evaluated longitudinally using linear mixed-effects models. Results: At the baseline, adolescents with AN showed reduced bacterial richness compared with healthy controls, with significantly lower Chao1 diversity (p = 0.00013), whereas the Shannon and Simpson indices did not differ significantly (p = 0.54 and p = 0.27, respectively). Microbial community composition differed significantly between groups based on Bray–Curtis (R² = 0.0724, FDR-adjusted p = 0.001) and unweighted UniFrac (R² = 0.0540, FDR-adjusted p = 0.001) distances. LEfSe identified 19 differentially abundant taxa; among the strongest discriminators, Blautia_A_141781, Romboutsia_B, and Clostridium_T were enriched in AN, whereas Akkermansia, Phocaeicola_A_858004, and Bacteroides_H were enriched in the healthy controls. Nutritional rehabilitation was associated with partial microbiota remodeling, alongside significant improvements in BMI and heart rate. Several host-derived biomarkers, including urinary indican, serotonin, nitric oxide, and serum occludin, changed significantly over time, whereas bile acids, short-chain fatty acids, IgA, lipopolysaccharide, and haptoglobin remained stable. Conclusions: Gut microbiota and host-derived biomarkers evolve dynamically during nutritional rehabilitation in adolescents with severe AN, supporting their potential role as complementary tools for monitoring biological recovery.

Background: Avoidant/restrictive food intake disorder (ARFID) and selective eating are increasingly recognized in pediatric nutrition, but food selectivity has been predominantly studied in dedicated eating disorder settings and in underweight children, potentially underestimating its prevalence across broader clinical populations. This study aimed to characterize food selectivity as a transdiagnostic feature in children referred to a tertiary pediatric nutrition center, regardless of referral diagnosis or BMI status. Methods: This retrospective observational study included 417 consecutive children and adolescents (median age 9.3 years, IQR 4.1–12.9; 47.5% male) assessed at the General Pediatric Eating Disorders Outpatient Unit of Bambino Gesù Children’s Hospital IRCCS, Rome, Italy, between May 2024 and April 2026. Food selectivity was defined as clinician-documented avoidance of at least one of four food groups (vegetables, fruit, fish, and legumes). Patients were classified as having primary selective eating/ARFID (Group A, n = 141), unrecognized selective eating (Group B, n = 163), or no selectivity (Group C, n = 113). Results: Food selectivity was identified in 293 patients (70.3%), including 70.8% of those referred for obesity or overweight and 50.0% of those referred for eating disorders. Prevalence did not differ across BMI categories (p = 0.554), confirming that selective eating is independent of anthropometric status. Ferritin deficiency showed a significant gradient across groups (Group A 32.2%, Group B 17.9%, Group C 10.8%; p = 0.002). Screen use during meals and ultra-processed food consumption were similarly elevated in Groups A and B and significantly higher than in Group C (p = 0.002 and p < 0.001, respectively), with no difference between the two selective groups. Conclusions: Food selectivity is a transdiagnostic and BMI-independent feature affecting the majority of children referred for pediatric nutritional evaluation. Children with unrecognized selective eating share the same nutritional risks and behavioral correlates as those formally diagnosed with ARFID, supporting the integration of a brief food group avoidance screen into routine nutritional assessment regardless of the primary referral diagnosis.

In the last years the use of digital media devices (MD) among adolescents has increased exponentially, becoming a central component of daily life for many

Background: Anorexia nervosa (AN) is a complex psychiatric disorder that requires a multidisciplinary approach. The World Health Organization recognizes the therapeutic value of expressive arts, including drama, in enhancing emotional, cognitive, and relational domains in severe mental illnesses such as AN. Expressive arts interventions may improve emotional intelligence, empathy, and self-awareness while reducing anxiety and alexithymia. This study evaluated the impact of an adjunctive expressive arts program on alexithymia in pediatric inpatients with AN. Methods: We enrolled patients aged 11–18 years hospitalized for AN, according to the American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision, at the Pediatric Unit of Bambino Gesù Children’s Hospital, Rome. The study period ran from December 2024 to April 2025. Participants attended drama therapy sessions and expressive arts workshops in a dedicated recreational space integrated into a multidisciplinary treatment plan. Alexithymia was assessed at admission and discharge using the Toronto Alexithymia Scale (TAS-20), with scores ≥ 61 indicating alexithymia. At the end of the program, participants completed a semi-structured satisfaction questionnaire to evaluate subjective experiences and mood. Results: Thirty patients met inclusion criteria. The TAS-20 scores were statistically different between pre-/post-theater activity (p < 0.001). The proportion of alexithymic participants declined from 73.3% at baseline to 26.7% at discharge. Most participants reported mood improvements: 66.6% “somewhat” and 26.7% “greatly.” Additionally, 90% reported improved peer relationships. Conclusions: Expressive arts, particularly drama-based interventions, may represent an effective adjunctive therapy for adolescents with AN, supporting emotional awareness, self-regulation, and social connectedness. Arts-based interventions are associated with nonverbal avenues for emotional processing and may promote neuroplasticity, representing valuable complementary strategies for AN treatment.

Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by inappropriate levels of attention, hyperactivity, and impulsivity that interfere with individual functioning. The international guidelines recommend targeting ADHD-related neurochemical brain abnormalities by intervening via drug treatment, such as methylphenidate (MPH), as first choice. Drug treatments are usually associated with a huge amount of cost for families and the healthcare system, suspension for low compliance, poor long-term efficacy, and side effects. Transcranial direct current stimulation (tDCS) has been suggested as a possible noninvasive means to safely manipulate brain activity and, in turn, improve behavior and cognition in developmental ages. Several studies have shown that tDCS has the potential to improve ADHD-related cognitive deficits, but the effect of tDCS compared with MPH has never been evaluated. The aim of the present within-subject, sham-controlled, randomized proof-of-concept study is to demonstrate the positive effect of one-session anodal tDCS analogous to the MPH drug on inhibitory control and working memory in children and adolescents with ADHD. We strongly believe that this study protocol will serve to accelerate research into low-cost, drug-free, feasible interventions for ADHD.

Methylphenidate (MPH) is the treatment of first choice for developmental ADHD. To date, no reliable method to predict how patients will respond to MPH exists and conflicting results are reported on clinical characteristics of responders. The present study aims to give a more precise characterization of the patients who will respond best to MPH to help clinicians in defining the treatment plan. Age, neuropsychological functioning (i.e., attention and working memory), and behavioral/emotional symptoms of 48 drug-naïve children and adolescents with ADHD (42 boys and 6 girls, age-range 6–16 years, mean age 10.5 ± 2.5 years, mean IQ 101.3 ± 11.2) were studied to assess how these different characteristics affected a single-dose MPH response. Four hierarchical linear regression models were used to explore whether age, neuropsychological measures at baseline, and behavioral/emotional symptoms could predict attention and working memory measures after a single-dose MPH administration. We found that improvement in attention and working memory was predicted by age, neuropsychological measures at baseline, and severity of ADHD symptoms. No behavioral and emotional symptoms predicted single-dose MPH response with the exception of conduct symptoms.

Attention Deficit/Hyperactivity Disorder (ADHD) is the most frequently diagnosed neurodevelopmental disorder in school-age children, and it is usually associated with a significant impairment in global functioning. Traditionally, boys with ADHD are more likely to be referred for clinical assessments due to a higher prevalence of externalizing symptoms. However, as regards gender-related differential clinical characteristics between boys and girls with ADHD, further investigation is warranted in light of conflicting results found in currently available literature. In fact, a more precise clinical characterization could help increase appropriate diagnoses and treatment planning. In this context, we carried out a retrospective observational study on 715 children and adolescents diagnosed with ADHD from 2018 to 2020 at our center, in order to describe their gender-related clinical characteristics. Boys displayed higher average IQs, but they were comparable to girls in functional impairments and adaptive skills. Girls displayed higher scores on the Attention Problems subscale of the CBCL 6–18 and on several CPRS-R:L subscales, suggesting higher general ADHD symptom severity. Boys showed higher scores on CBCL 6–18 subscales, such as withdrawn/depressed, internalizing, and obsessive-compulsive problems. In conclusion, girls showed more severe ADHD features and lower IQ in clinically referred settings, while boys showed more internalizing problems and obsessive-compulsive symptoms.