1/10 Our latest research, led by Monika Moissidis, identifies a mechanism regulating the maturation of PV interneurons in the #cortex. This is the story @cellcellpress.bsky.social www.cell.com/cell/fulltex... ⬇︎ thread @devneuro.bsky.social @kingsioppn.bsky.social
@wellcometrust.bsky.social
8/10 Importantly, this mechanism also allows PV interneurons to regulate their mitochondrial content and function, which may also contribute to their maturation
Neuronal activity triggers PGC-1α-mediated transcriptional programs that drive the
late maturation of PV+ interneurons, essential for cortical circuit function. PGC-1α
partners with ERRγ and Mef2c to ...
www.cell.com
6/10 How is this achieved? We discovered that PGC-1alpha regulates the expression of most genes that are typically enriched in mature PV interneurons
7/10 PGC-1alpha cooperates with ERR-gamma to directly regulate the transcription of many PV-enriched genes. Incidentally, it also seems involved in repressing genes that are typically enriched in other cells, like SST interneurons
2/10 PV interneurons are a type of inhibitory neuron in the cortex, characterized by their expression of the calcium-binding protein parvalbumin. These neurons play a crucial role in regulating neuronal activity and are involved in #memory, sensory processing, and motor control
4/10 Interestingly, while PV interneurons are generated in the embryo, they are late bloomers: in humans, for example, it takes more than two years for PV interneurons to acquire their mature properties
9/10 In sum, our findings reveal a postnatal molecular switch that drives the activity-dependent maturation of parvalbumin interneurons, a critical population for cortical function. Funded by the @wellcometrust.bsky.social
3/10 Several unique properties distinguish PV interneurons: They exert a very tight control over the output of pyramidal cells; are fast-spiking, meaning they can fire action potentials at very high frequencies; are covered by perineuronal nets, and have many mitochondria
5/10 What are the mechanisms regulating the protracted maturation of cortical interneurons? We found that this process requires neuronal activity and is mediated by the transcriptional modulator PGC-1alpha
10/10 Here’s the paper @cellcellpress.bsky.social if you want to dig in www.cell.com/cell/fulltex... That’s it. Thanks for sharing! @devneuro.bsky.social @mrc-cndd.bsky.social @kingsioppn.bsky.social @kingscollegelondon.bsky.social @wellcometrust.bsky.social
Oscar Marín Lab
Oscar Marín Lab
Neuronal activity triggers PGC-1α-mediated transcriptional programs that drive the
late maturation of PV+ interneurons, essential for cortical circuit function. PGC-1α
partners with ERRγ and Mef2c to ...
