Capgras Syndrome in Advanced Parkinson's Disease.

Psychosis is common in Parkinson's disease (PD), especially in advanced disease, and can lead to a number of psychotic symptoms, including delusions. One uncommon delusion is Capgras syndrome (CS). The authors report on three PD patients with a history of deep brain stimulation (DBS) who developed this delusion. The anatomic targets in these three patients were the subthalamic nuclei in two patients and the globus pallidus interna in one patient. The length of time between surgery and development of CS varied but was greater than 6 months. Additionally, all three patients showed evidence of impaired cognition prior to development of CS. Therefore, due to the length of time between DBS and CS in all three cases and the fact that one patient developed CS months after DBS explanation, DBS does not appear to be associated with CS. Given the distressing nature of this condition, patients with advanced PD who undergo DBS should be regularly screened for symptoms of psychosis with awareness of CS as a potential form.

Novel INHAT repressor (NIR) is required for early lymphocyte development.

Novel inhibitor of histone acetyltransferase repressor (NIR) is a transcriptional corepressor with inhibitor of histone acetyltransferase activity and is a potent suppressor of p53. Although NIR deficiency in mice leads to early embryonic lethality, lymphoid-restricted deletion resulted in the absence of double-positive CD4(+)CD8(+) thymocytes, whereas bone-marrow-derived B cells were arrested at the B220(+)CD19(-) pro-B-cell stage. V(D)J recombination was preserved in NIR-deficient DN3 double-negative thymocytes, suggesting that NIR does not affect p53 function in response to physiologic DNA breaks. Nevertheless, the combined deficiency of NIR and p53 provided rescue of DN3L double-negative thymocytes and their further differentiation to double- and single-positive thymocytes, whereas B cells in the marrow further developed to the B220(+)CD19(+) pro-B-cell stage. Our results show that NIR cooperate with p53 to impose checkpoint for the generation of mature B and T lymphocytes.

Comparison of Parkinson's Disease Patients' Characteristics by Indication for Deep Brain Stimulation: Men Are More Likely to Have DBS for Tremor.

Background: We investigated whether the characteristics of Parkinson's disease (PD) patients differ based on the primary indication for deep brain stimulation (DBS). Methods: We reviewed data for 149 consecutive PD patients who underwent DBS at the University of Virginia. Patients were categorized based on primary surgical indication, and clinical characteristics were compared between groups. Results: Twenty-nine (93.5%) of 31 PD patients who underwent DBS for medication refractory tremor were men, and 66 (62.3%) of 106 PD patients who underwent DBS for motor fluctuations were men (p = 0.001). Other primary indications for DBS were tremor and fluctuations (n = 5), medication intolerance (n = 5), and dystonia (n = 2). Discussion: Patients who underwent DBS for medication refractory tremor were predominantly men, while patients who had DBS for motor fluctuations approximated the gender distribution of PD. Possible explanations are that men with PD are more likely to develop medication refractory tremor or undergo surgery for medication refractory tremor in PD compared to women.