GSBS Student Publications

Title

Neuron-glia interactions through the Heartless FGF receptor signaling pathway mediate morphogenesis of Drosophila astrocytes

Student Author(s)

Ozge E. Tasdemir-Yilmaz

GSBS Program

Neuroscience

UMMS Affiliation

Department of Neurobiology; Freeman Lab; Graduate School of Biomedical Sciences, Neuroscience Program

Date

7-16-2014

Document Type

Article

Medical Subject Headings

Animals; Astrocytes; Cell Communication; Cell Shape; Cytoskeleton; Drosophila; Drosophila Proteins; Morphogenesis; Neurons; Protein-Tyrosine Kinases; Receptors, Fibroblast Growth Factor; Signal Transduction

Disciplines

Developmental Neuroscience | Molecular and Cellular Neuroscience

Abstract

Astrocytes are critically important for neuronal circuit assembly and function. Mammalian protoplasmic astrocytes develop a dense ramified meshwork of cellular processes to form intimate contacts with neuronal cell bodies, neurites, and synapses. This close neuron-glia morphological relationship is essential for astrocyte function, but it remains unclear how astrocytes establish their intricate morphology, organize spatial domains, and associate with neurons and synapses in vivo. Here we characterize a Drosophila glial subtype that shows striking morphological and functional similarities to mammalian astrocytes. We demonstrate that the Fibroblast growth factor (FGF) receptor Heartless autonomously controls astrocyte membrane growth, and the FGFs Pyramus and Thisbe direct astrocyte processes to ramify specifically in CNS synaptic regions. We further show that the shape and size of individual astrocytes are dynamically sculpted through inhibitory or competitive astrocyte-astrocyte interactions and Heartless FGF signaling. Our data identify FGF signaling through Heartless as a key regulator of astrocyte morphological elaboration in vivo.

Rights and Permissions

Citation: Neuron. 2014 Jul 16;83(2):388-403. doi: 10.1016/j.neuron.2014.06.026. Link to article on publisher's site

Related Resources

Link to Article in PubMed

Journal Title

Neuron

PubMed ID

25033182