Our research group is interested in the genetic and cellular mechanisms of the development and function of the brain's inhibitory system. We apply advanced mouse genetics in combination with electrophysiology and modern molecular methods.

The group has three major research interests:

Neural diversity –function
Since the days of Ramon y Cajal we have known that the inhibitory system exhibits a stunning diversity. A major research effort has gone into characterizing the morphology, marker expression and electrophysiological properties of the interneurons (see Rudy et al 2011). With modern genetics we are starting to get a molecular handle on this diversity in order to functionally target individual cell classes with agents revealing their connectivity as well as either driving their activity or silencing them. We have recently identified a number of novel classes of interneurons and are studying their role in the local and long-range circuitry as well as developing and applying pharmaco -genetic tools to study their role in behavioral paradigm.

Neural diversity -stability
Knowing the transcriptional state of cells gives many clues how cell classes are related to each other but even with state of the art techniques the data remains as “snapshots” of individual cells and does not tell us how these profiles can change over time. We are interested in what aspects of cell transcription and function are stable over time and which parameter are variable in response to the environment of the cells.

Genetic mechanisms controlling the emergence of higher cognitive function
Ever wondered why it might be a bad idea to lend your car to a teenager? Why does many forms of neuropsychiatric disorders including Schizophrenia, depression and bipolar-disorder have a late onset, typically late teens - early twenties? The goal of our lab is to study the cellular changes that occur around or just after sexual maturation and which genetic programs that control these changes. We are currently studying a few promising candidate genes as well as performing functional large scale arrays in order to identify novel genetic programs.

Figure: Top: Excitatory vs. inhibitory contribution (left half) and MGE vs. CGE contribution to the inhibitory system (right half) of different structures (Fishell and Rudy, 2011). Bottom: proposed scheme of cortical interneuron subtypes from the three major classes: Parvalbumin (PV), Somatostatin (SST) and Serotonin receptor 3a (5HT3a) expressing interneurons (Rudy et al., 2011)