Molecular Evolution of Phosphoprotein Phosphatases in Drosophila

Phosphoprotein phosphatases (PPP), these ancient and important regulatory enzymes are present in all eukaryotic organisms. Based on the genome sequences of 12 Drosophila species we traced the evolution of the PPP catalytic subunits and noted a substantial expansion of the gene family. We concluded that the 18–22 PPP genes of Drosophilidae were generated from a core set of 8 indispensable phosphatases that are present in most of the insects. Retropositons followed by tandem gene duplications extended the phosphatase repertoire, and sporadic gene losses contributed to the species specific variations in the PPP complement. During the course of these studies we identified 5, up till now uncharacterized phosphatase retrogenes: PpY+, PpD5+, PpD6+, Pp4+, and Pp6+ which are found only in some ancient Drosophila. We demonstrated that all of these new PPP genes exhibit a distinct male specific expression. In addition to the changes in gene numbers, the intron-exon structure and the chromosomal localization of several PPP genes was also altered during evolution. The G−C content of the coding regions decreased when a gene moved into the heterochromatic region of chromosome Y. Thus the PPP enzymes exemplify the various types of dynamic rearrangements that accompany the molecular evolution of a gene family in Drosophilidae

The prevalence of catatonic syndrome in an acute psychiatric ward

Aim: The aim of this prospective study was to determine the prevalence of the catatonic syndrome in a cohort of patients admitted to acute psychiatric units in Hungary. Method: Patients admitted to the acute inpatient unit of the Center of Psychiatry and Addiction Medicine, Szent István and Szent László Hospitals in a 4-month period were screened for catatonic signs and symptoms. Catatonic signs/symptoms were scored according to both the DSM-5 diagnostic criteria and the Bush–Francis Catatonia Rating Scale (BFCRS). Clinical diagnoses were established using the Structured Clinical Interview for DSM-IV Disorders (SCID), while cognitive performance was estimated with the Clock Drawing Test and the Mini-Mental State Examination (MMSE). Results: During the study period, 342 patients were admitted to the above-mentioned acute inpatient units. The prevalence figures for the catatonic syndrome were 8.55% and 5.02% according to the BFCRS and the DSM-5, respectively. Conclusions: The prevalence of catatonic syndrome in an acute inpatient setting is within the broad range of figures reported in the literature. The difference between the standardized assessment (BFCRS) and routine clinical judgment (DSM-5) is noteworthy and suggests that a significant minority of catatonic patients might not be identified in clinical practice. As acute catatonia can be effectively treated, and early treatment could prevent potentially life-threatening complications, recognition of catatonic symptoms is vitally important