Causal relationship between genetically predicted mental disorders and frailty: a bidirectional and multivariable mendelian randomization study.

Background: In observational studies, frailty has been strongly associated with mental disorders. However, the mechanisms underlying the association between frailty and mental disorders remain unclear.

Methods: We conducted a two-sample Mendelian randomization (MR) study to assess the causal relationship between frailty, as measured by the frailty index (FI), and ten common mental disorders.

A bifunctional naphthalimide-based fluorescent probe for imaging lysosomal peroxynitrite and viscosity in living cells and zebrafish.

Peroxynitrite (ONOO) and viscosity are critical indicators of lysosome functionality, intimately linked to numerous diseases' pathophysiological processes. Hence, creating reliable analytical techniques to observe fluctuations in lysosomal ONOO and viscosity is highly important. This study presents the development of a novel naphthalimide-based fluorescent probe, Nap-Cy, specifically designed to target lysosomes and simultaneously detect both ONOO and viscosity.

Causal contributions of cell-type-specific circuits in the posterior dorsal striatum to auditory decision-making.

In the dorsal striatum (DS), the direct- and indirect-pathway striatal projection neurons (dSPNs and iSPNs) play crucial opposing roles in controlling actions. However, it remains unclear whether and how dSPNs and iSPNs provide distinct and specific contributions to decision-making, a process transforming sensory inputs to actions. Here, we perform causal interrogations on the roles of dSPNs and iSPNs in the posterior DS (pDS) in auditory-guided decision-making.