Catatonia has many potential underlying causes, but in some patients, no clear etiology is identified, sparking growing interest in its genetic basis. We aimed to provide the first comprehensive synthesis of genetic abnormalities in catatonia.

In this systematic review (PROSPERO CRD42023455118) we searched MEDLINE All, Embase Classic + Embase, PsycINFO, and AMED up to August 15, 2023, for studies on genetic testing and catatonia phenotyping in all age groups. Catatonia was diagnosed using specified diagnostic criteria or description of clinical features. Risk of bias was assessed using the Joanna Briggs Institute quality assessment tools. Results were summarized with a narrative synthesis.

We included 99 studies involving 8600 individuals. Sex was reported for 6080 individuals, of whom 3208 (52.8%) were male. Mean age at onset of catatonia was 28.8 years (SD 16.3). The median duration of the index catatonic episode was 180 days (IQR 38 to 668). Stupor and mutism were the most frequently reported symptoms. Forty-seven genetic conditions were reported in catatonia, including Phelan-McDermid syndrome (n = 80), 22q11.2 deletion syndrome (n = 23), and Down’s syndrome (n = 19). Study quality was good in 29 studies, moderate in 53, and poor in 17. The major focus of association studies has centered on periodic catatonia; despite identifying candidate genes at both 22q13 and 15q15, none have been replicated.

Catatonia can manifest in a wide range of genetic syndromes, suggesting a shared vulnerability across diverse genetic and developmental disorders. We did not identify a unique phenomenology or treatment response profile in genetic associations of catatonia.

Autism spectrum disorders (ASD) are a group of neurodevelopmental disorders that show delays and deficits in the development of multiple brain functions, which are characterized by social communication, poor language development, and restricted and stereotyped patterns of interests and behaviours. ASD affects about 1-2 % of the population and are considered to be highly genetic in nature. Structural variations of chromosomes have been identified in some ASD individuals, most common on chromosome 7q, 15q and 22q.

1-To present a systematic literature review of the natural history of individuals with 22q13.3 deletion syndrome, Phelan-McDermid syndrome (PMS). PMS, increase awareness of different phenotypes 2- Correlation of clinical manifestations of PMS with hypothesized underlying biological mechanisms 3-Rational for novel treatments is inferred through translational neuroscience approaches.

We have conducted a systematic literature review of the natural history of individuals with PMS, including both cross-sectional and long-term longitudinal analyses and correlation with hypothesized underlying biological mechanisms, including roles in regulation synaptic development, function, and plasticity. This systematic review includes the basis for a promising common pathway for ASD pathogenesis and the clinical implications of novel therapeutic strategies inferred through translational neuroscience approaches.

This systematic review, therefore, outlines the: (1) Pathophysiological basis and clinical manifestations of PMS; (2) PMS pre-clinical models and applications to ASD; and (3) clinical implications of novel therapeutic strategies.

A promising common pathway for ASD pathogenesis and rational for novel treatments is inferred through translational neuroscience approaches. Neurobiological basis for lithium treatment is indeed supported by experimental results and current clinical findings.

No significant relationships.