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In this position statement, developed by The International College of Obsessive-Compulsive Spectrum Disorders, a group of international experts responds to recent developments in the evidence-based management of obsessive-compulsive disorder (OCD). The article presents those selected therapeutic advances judged to be of utmost relevance to the treatment of OCD, based on new and emerging evidence from clinical and translational science. Areas covered include refinement in the methods of clinical assessment, the importance of early intervention based on new staging models and the need to provide sustained well-being involving effective relapse prevention. The relative benefits of psychological, pharmacological and somatic treatments are reviewed and novel treatment strategies for difficult to treat OCD, including neurostimulation, as well as new areas for research such as problematic internet use, novel digital interventions, immunological therapies, pharmacogenetics and novel forms of psychotherapy are discussed.

Aims Psychiatric disorders represent highly impairing conditions, often underdiagnosed and undertreated, with a conspicuous duration of untreated illness (DUI). Given that social and cultural factors influence the DUI and assuming that progress in diagnosis and treatment determines a reduced latency to pharmacotherapy, we assessed and compared DUI and related variables in a large sample of psychiatric patients (n = 562) whose onset occurred within three different a priori‐defined epochs. Methods Two temporal cut‐offs were established – the year 1978, when Law 180 (redefining standards for mental care) was introduced in Italy, and the year 2000 – in order to divide patients into three subgroups: onset before 1978, onset 1978–2000 and onset after 2000. Results A significant difference in terms of age at onset, age at first diagnosis and age at first treatment was observed in patients with onset 1978–2000 and in those with onset after 2000. In addition, a significant reduction of the DUI was found across epochs (onset before 1978: 192.25 ± 184.52 months; onset 1978–2000: 77.00 ± 96.63 months; and onset after 2000: 19.00 ± 31.67 months; P < 0.001). Furthermore, the proportion of patients with onset‐related stressful events, use of benzodiazepines and neurological referral was found to be significantly different between the three epochs (χ2 = 23.4, P < 0.001; χ2 = 9.92, P = 0.007; χ2 = 16.50, P = 0.011). Conclusions Present data indicate a progressive, statistically significant reduction of latency to treatment and other related changes across subsequent epochs of onset in patients with different psychiatric disorders. Future studies will assess specific changes within homogeneous diagnostic subgroups.

Augmentative rTMS appeared to be effective and well tolerated for the acute treatment of unipolar and bipolar depression with features of poor drug response/treatment resistance, showing a comparable effectiveness profile between protocols of high and low frequency stimulation.

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Bipolar Disorder (BD) is a prevalent and disabling condition, determined by gene-environment interactions, possibly mediated by epigenetic mechanisms. The present study aimed at investigating the transcriptional regulation of BD selected target genes by DNA methylation in peripheral blood mononuclear cells of patients with a DSM-5 diagnosis of type I (BD-I) and type II (BD-II) Bipolar Disorders (n = 99), as well as of healthy controls (CT, n = 42). The analysis of gene expression revealed prodynorphin (PDYN) mRNA levels significantly reduced in subjects with BD-II but not in those with BD-I, when compared to CT. Other target genes (i.e. catechol-O-methyltransferase (COMT), glutamate decarboxylase (GAD67), serotonin transporter (SERT) mRNA levels remained unaltered. Consistently, an increase in DNA methylation at PDYN gene promoter was observed in BD-II patients vs CT. After stratifying data on the basis of pharmacotherapy, patients on mood-stabilizers (i.e., lithium and anticonvulsants) were found to have lower DNA methylation at PDYN gene promoter. A significantly positive correlation in promoter DNA methylation was observed in all subjects between PDYN and brain derived neurotrophic factor (BDNF), whose methylation status had been previously found altered in BD. Moreover, among key genes relevant for DNA methylation establishment here analysed, an up-regulation of DNA Methyl Transferases 3b (DNMT3b) and of the methyl binding protein MeCP2 (methyl CpG binding protein 2) mRNA levels was also observed again just in BD-II subjects. A clear selective role of DNA methylation involvement in BD-II is shown here, further supporting a role for BDNF and its possible interaction with PDYN. These data might be relevant in the pathophysiology of BD, both in relation to BDNF and for the improvement of available treatments and development of novel ones that modulate epigenetic signatures.