Ina-Ofelia Focsa

Genetic neurodevelopmental disorders (NDDs) encompass a heterogeneous group of conditions characterized by impaired cognitive, behavioral, and neurological development resulting from pathogenic variants affecting brain development and synaptic function. Advances in molecular genetics and next-generation sequencing have significantly expanded the understanding of the genetic architecture underlying disorders such as Rett syndrome (RTT), Fragile X syndrome (FXS), Angelman syndrome (AS), and autism spectrum disorders. Beyond these classical neurodevelopmental disorders, spinal muscular atrophy (SMA) is included as a paradigmatic example of successful RNA-based therapeutic translation. Concurrently, RNA-based therapeutics have emerged as promising precision medicine strategies capable of modulating gene expression at the transcriptional and post-transcriptional levels. These approaches include antisense oligonucleotides (ASOs), small interfering RNAs (siRNAs), messenger RNA (mRNA) therapies, RNA editing technologies, and splice-modulating agents. Recent clinical successes, particularly in spinal muscular atrophy, have demonstrated the transformative potential of RNA therapeutics in neurological disease. However, substantial challenges remain, including BBB penetration, long-term safety, immune activation, and genotype-specific variability in therapeutic response. This review summarizes current advances in RNA-based therapeutics for genetic NDDs, highlighting molecular mechanisms, disease-specific therapeutic strategies, translational progress, delivery challenges, and future directions. Overall, continued progress will depend on the integration of disease biology, rational RNA therapeutic design, and effective CNS-targeted delivery, supporting the broader implementation of precision RNA medicine for genetic neurodevelopmental disorders.

Sleep disturbances represent one of the most frequent and clinically significant comorbidities in children with autism spectrum disorder (ASD), affecting approximately 50–80% of individuals. Clinically, these disturbances encompass a broad spectrum of disorders, including insomnia, parasomnias, sleep-related movement disorders, and sleep-related breathing disorders, commonly presenting with prolonged sleep latency, frequent nocturnal awakenings, reduced total sleep time, and alterations in sleep architecture. Circadian rhythm dysregulation, abnormalities in neurotransmitter systems such as GABA and serotonin, and altered melatonin signaling have been consistently implicated. These processes may reflect underlying genetic and metabolic influences affecting circadian clock regulation and synaptic function. The management of sleep disturbances in ASD requires a comprehensive approach combining behavioral strategies, caregiver education, and sleep hygiene interventions, while pharmacological options, particularly melatonin, may be considered when non-pharmacological measures are insufficient. Understanding the multifactorial mechanisms underlying sleep disturbances in ASD is essential for improving early recognition and developing individualized therapeutic strategies. This review synthesizes current evidence on the prevalence, biological mechanisms, clinical manifestations, and management of sleep disturbances in ASD, providing an integrated perspective for both clinicians and researchers.

Background: Pediatric-onset multiple sclerosis (POMS) is a rare and heterogeneous condition, with clinical features, progression, and therapeutic response varying significantly according to age at onset. Early-onset MS (12 years) forms. Methods: We conducted a retrospective analysis of medical records from 120 pediatric patients diagnosed with MS at a tertiary neurology center between 2018 and 2024. Patients were grouped by age at onset and assessed for clinical presentation, number and timing of relapses, EDSS scores, imaging findings, and treatment patterns. Results: Early-onset MS was associated with atypical symptoms, delayed diagnosis, more frequent relapses, and multifocal brainstem and cerebellar involvement. The diagnosis was significantly delayed in younger children compared to adolescents. EDSS scores tended to remain stable in the first 2–3 years, but early-onset patients showed a notable decline after the fourth year. While most patients received disease-modifying therapies, high-efficacy agents were underused due to age-related restrictions. Intermediate-onset patients presented overlapping features of both early and late-onset MS and had the highest proportion of fully preserved motor function (EDSS 0) at the end of follow-up. MRI findings revealed more extensive and confluent lesions in younger patients, particularly in the first two years after onset. Conclusions: Age at disease onset is a key determinant of clinical course and treatment response in pediatric MS. Early recognition and timely initiation of appropriate therapy—especially high-efficacy agents—may improve outcomes and reduce long-term disability. Further multicenter studies with standardized imaging and cognitive assessment protocols are needed to optimize care for this vulnerable population.

Background: Epilepsy, particularly early-onset and drug-resistant forms, presents a significant challenge in pediatric neurology. Inborn errors of metabolism are increasingly recognized as important contributors to these types of epilepsy. Timely diagnosis and treatment are crucial in preventing irreversible metabolic damage and improving clinical outcomes in CAD deficiency. This condition is a progressive and severe metabolic disorder caused by biallelic deleterious variants in CAD gene, and is characterized by long seizures, psychomotor regression, and dyserythropoietic anemia. Methods: In this paper, we present four new cases of EIEE-50, emphasizing the importance of early, specific therapeutic interventions. Results: Oral uridine 100 mg/kg/day was administrated with improvement of motor and cognitive function as well as immediate seizures control. Conclusions: Our findings underscore the potential for improved outcomes of EIEE-50 trought timely diagnosis and targeted treatment strategies, reinforcing the role of uridine supplementation as a promising therapeutic approach.

Epilepsy, particularly early-onset and drug-resistant forms, presents a significant challenge in pediatric neurology. Inborn errors of metabolism are increasingly recognized as important contributors to these types of epilepsy. Timely diagnosis and treatment are crucial, as they can prevent irreversible metabolic damage and improve clinical outcomes and. Biallelic deleterious variants in CAD gene led CAD deficiency, progressive and severe metabolic disorder characterized by long seizures, psychomotor regression, and dyserythropoietic anemia. In this paper, we present four new cases of EIEE-50, emphasizing the importance of early, specific therapeutic interventions. Oral uridine 100 mg/kg/day was administrated with improvement of motor and cognitive function as well as immediate seizures control. Our findings underscore the potential for improved outcomes of EIEE-50 with timely and targeted treatment strategies.

Lung cancer, a malignant neoplasm originating from the epithelial cells of the lung, is characterized by its aggressive growth and poor prognosis, making it a leading cause of cancer-related mortality globally

Colorectal cancer (CRC) arises through a combination of genetic and epigenetic alterations that affect key pathways involved in tumor growth and progression. This review examines the major molecular pathways driving CRC, including Chromosomal Instability (CIN), Microsatellite Instability (MSI), and the CpG Island Methylator Phenotype (CIMP). Key mutations in genes such as APC, KRAS, NRAS, BRAF, and TP53 activate signaling pathways like Wnt, EGFR, and PI3K/AKT, contributing to tumorigenesis and influencing responses to targeted therapies. Resistance mechanisms, including mutations that bypass drug action, remain challenging in CRC treatment. This review highlights the role of molecular profiling in guiding the use of targeted therapies such as tyrosine kinase inhibitors and immune checkpoint inhibitors. Novel combination treatments are also discussed as strategies to improve outcomes and overcome resistance. Understanding these molecular mechanisms is critical to advancing personalized treatment approaches in CRC and improving patient prognosis.

This article provides a comprehensive overview of lung cancer from a genetic perspective, emphasizing the molecular pathways involved in its pathogenesis. This review presents the genetic syndromes and key genomic variations, including alterations and instabilities, that contribute to tumor development and progression. Furthermore, advancements in genomic testing, such as liquid biopsy, are explored, highlighting their utility in early diagnosis, prognostic evaluation, and personalized treatment strategies. The role of biomarkers in informing therapeutic decisions and optimizing patient outcomes is also examined, offering insights into their potential to refine clinical interventions. This review aims to enrich the understanding of the genetic landscape of lung cancer, providing insights that may lead to improved diagnostic and therapeutic approaches.

Colorectal cancer (CRC) arises through a combination of genetic and epigenetic alterations that affect key pathways involved in tumor growth and progression. This review examines the major molecular pathways driving CRC, including Chromosomal Instability (CIN), Microsatellite Instability (MSI), and the CpG Island Methylator Phenotype (CIMP). Key mutations in genes such as APC, KRAS, NRAS, BRAF, and TP53 activate signaling pathways like Wnt, EGFR, and PI3K/AKT, contributing to tumorigenesis and influencing responses to targeted therapies. Resistance mechanisms, including mutations that bypass drug action, remain challenging in CRC treatment. The review highlights the role of molecular profiling in guiding the use of targeted therapies such as tyrosine kinase inhibitors and immune checkpoint inhibitors. Novel combination treatments are also discussed as strategies to improve outcomes and overcome resistance. Understanding these molecular mechanisms is critical to advancing personalized treatment approaches in CRC and improving patient prognosis.