What question did this study set out to answer?

To determine whether GABA receptor activity is required to drive the developmental shift of GABA responses from depolarizing to hyperpolarizing in cultured midbrain neurons.

June 4, 2003The Journal of PhysiologyOpen Access

Hyperpolarizing Inhibition Develops without Trophic support by GABA in Cultured Rat Midbrain Neurons

View Full Paper

Ask AI

Bookmark

Authors

STStefan TitzHeidelberg University MHMichael HansUniversitätsklinikum des Saarlandes WKWolfgang KelschJohannes Gutenberg University Mainz

Discussion

Member takes

Implication

In vitro study reveals that GABA responses mature from depolarizing to hyperpolarizing without GABAA receptor activity in midbrain neurons, indicating intrinsic developmental programming.

Key Points

To determine whether GABA receptor activity is required to drive the developmental shift of GABA responses from depolarizing to hyperpolarizing in cultured midbrain neurons.
Cultured rat midbrain neurons with chronic blockade of GABAA receptors throughout development.
Assessed intracellular calcium levels and chloride driving forces using gramicidin perforated-patch clamp recordings and calcium imaging.
GABAergic responses switched from depolarizing to hyperpolarizing during development despite continuous blockade of GABAA receptors.
Immature neurons exhibited diminished chloride driving forces and attenuated calcium elevations after prolonged or repetitive GABA exposure, which were transiently reversed by elevated external potassium.
Mature neurons demonstrated hyperpolarizing chloride currents that decreased intracellular calcium levels, maintained by potassium-chloride cotransport.

Cite This Study

Titz et al. (2003) studied this question.

synapsesocial.com/papers/6a9eb866e2d0fc9581be752e https://doi.org/10.1113/jphysiol.2003.041863

View Full Paper

Ask AI

Bookmark

Implication

In vitro study reveals that GABA responses mature from depolarizing to hyperpolarizing without GABAA receptor activity in midbrain neurons, indicating intrinsic developmental programming.

Hyperpolarizing Inhibition Develops without Trophic support by GABA in Cultured Rat Midbrain Neurons

Discussion

Member takes

Implication

Key Points

Cite This Study

Hyperpolarizing Inhibition Develops without Trophic support by GABA in Cultured Rat Midbrain Neurons

Discussion

Member takes

Implication

Key Points

Cite This Study

Also Consider

Also Consider