Population genetic structure of the Daubenton\u27s bat (Myotis daubentonii) in western Europe and the associated occurrence of rabies

The Daubenton\u27s bat is widespread and common in the UK and countries bordering the English Channel and North Sea. European bat lyssavirus 2 (EBLV-2), a rabies virus, has been detected in Daubenton\u27s bats in the UK and continental Europe. Investigating the relatedness of colonies and gene flow between these regions would allow regional estimates of the movement of Daubenton\u27s bats and thus the potential for disease transmission. The genetic structure of the Daubenton\u27s bat in western Europe was investigated by analysing variability at eight microsatellite loci. Genetic diversity was found to be high at all sites (HE = 0.73-0.84), with little differentiation between bats sampled in the UK and continental Europe. Mantel tests indicated a significant correlation between geographic distance and pair-wise FST (P = 0.000), between colonies sampled in Scotland and northern England. However, this was not continuous throughout the sampled range, with evidence of panmixia within the area sampled in continental Europe. Assignment tests show no evidence that the (potential) EBLV-2 sero-positive and virus positive bats were more likely to have originated from the continental rather than UK populations. There is no sufficient significant genetic differentiation amongst most UK and continental colonies to conclude that EBLV-2 is maintained in the UK by immigration. Results show that it is likely to be maintained at a low endemic level within the UK. The relative genetic uniformity of UK and continental populations implies that there is no migration barrier to EBLV-2, between these regions

Tsc1-mTORC1 signaling controls striatal dopamine release and cognitive flexibility.

Tuberous Sclerosis Complex (TSC) is a neurodevelopmental disorder caused by mutations in TSC1 or TSC2, which encode proteins that negatively regulate mTOR complex 1 (mTORC1). TSC is associated with significant cognitive, psychiatric, and behavioral problems, collectively termed TSC-Associated Neuropsychiatric Disorders (TAND), and the cell types responsible for these manifestations are largely unknown. Here we use cell type-specific Tsc1 deletion to test whether dopamine neurons, which modulate cognitive, motivational, and affective behaviors, are involved in TAND. We show that loss of Tsc1 and constitutive activation of mTORC1 in dopamine neurons causes somatodendritic hypertrophy, reduces intrinsic excitability, alters axon terminal structure, and impairs striatal dopamine release. These perturbations lead to a selective deficit in cognitive flexibility, preventable by genetic reduction of the mTOR-binding protein Raptor. Our results establish a critical role for Tsc1-mTORC1 signaling in setting the functional properties of dopamine neurons, and indicate that dopaminergic dysfunction may contribute to cognitive inflexibility in TSC

Searching for the “Active Ingredients” in Physical Rehabilitation Programs Across Europe, Necessary to Improve Mobility in People With Multiple Sclerosis: A Multicenter Study

Background. Physical rehabilitation programs can lead to improvements in mobility in people with multiple sclerosis (PwMS). Objective. To identify which rehabilitation program elements are employed in real life and how they might affect mobility improvement in PwMS. Methods. Participants were divided into improved and nonimproved mobility groups based on changes observed in the Multiple Sclerosis Walking Scale–12 following multimodal physical rehabilitation programs. Analyses were performed at group and subgroup (mild and moderate-severe disability) levels. Rehabilitation program elements included setting, number of weeks, number of sessions, total duration, therapy format (individual, group, autonomous), therapy goals, and therapeutic approaches. Results. The study comprised 279 PwMS from 17 European centers. PwMS in the improved group received more sessions of individual therapy in both subgroups. In the mildly disabled group, 60.9% of the improved received resistance training, whereas, 68.5% of the nonimproved received self-stretching. In the moderately-severely disabled group, 31.4% of the improved, received aerobic training, while 50.4% of the nonimproved received passive mobilization/stretching. Conclusions. We believe that our findings are an important step in opening the black-box of physical rehabilitation, imparting guidance, and assisting future research in defining characteristics of effective physical rehabilitation