Comparison of dopamine release and uptake parameters across sex, species
and striatal subregions
Abstract
For over three decades, fast scan cyclic voltammetry (FSCV) has been
used to selectively measure neurotransmitters such as dopamine (DA) with
high spatial and temporal resolution, providing detailed information
about regulation of DA in the extracellular space. FSCV is an optimal
method for determining concentrations of stimulus-evoked DA in brain
tissue. When modeling diseases involving disturbances in DA
transmission, preclinical rodent models are especially useful because of
the availability of specialized tools and techniques that serve as a
foundation for translational research. There is known heterogeneity in
DA dynamics between and within DA-innervated brain structures and
between males and females. However, systematic evaluations of sex- and
species-differences across multiple areas are lacking. Therefore, using
FSCV, we captured a broad range of DA dynamics across five sub-regions
of the dorsal and ventral striatum of males and females of both rats and
mice that reflect the functional heterogeneity of DA kinetics and
dynamics within these structures. While numerous differences were found,
in particular we documented a strong, consistent pattern of increased DA
transporter activity in females in all of the regions surveyed. The data
herein are intended to be used as a resource for further investigation
of DA terminal function.