Related Experiment Video

Updated: Jan 11, 2026

Müller Glia Cell Activation in a Laser-induced Retinal Degeneration and Regeneration Model in Zebrafish
06:27

Müller Glia Cell Activation in a Laser-induced Retinal Degeneration and Regeneration Model in Zebrafish

Published on: October 27, 2017

10.3K

Vascular Lamb1 guides the migration of retinal microglial precursors via Itga6-Rac1 signaling

Dan Zhan1, Leyao Xu1, Wenjing Mu1

  • 1Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing 400715, China.

Cell Reports
|November 9, 2025
PubMed

Insights

Retinal microglia precursors migrate via blood vessels, guided by vascular Lamb1 interacting with Itga6. This conserved signaling pathway is crucial for their entry into the eye and colonization of the retina during development.

Area of Science:

  • Developmental biology
  • Neuroscience
  • Ophthalmology

Background:

  • Microglia are essential for visual function, originating from embryonic hematopoiesis.
  • The precise mechanisms guiding microglial precursors to the retina are not fully understood.

Purpose of the Study:

  • To elucidate the mechanisms of microglial precursor migration into the developing retina.
  • To identify key molecular interactions guiding this process.

Main Methods:

  • Zebrafish and mouse models were used to study microglial precursor migration.
  • Genetic manipulation and imaging techniques were employed to analyze vascular guidance cues and cell migration.

Main Results:

  • Microglial precursors enter the vitreous space via blood vessels, primarily the hyaloid vein.
  • Vascular Laminin beta 1 (Lamb1) acts as a haptotactic cue, binding to Integrin alpha 6 (Itga6) on precursors.
  • This interaction activates Rac1 signaling, promoting directional migration and retinal colonization.
  • Disruption of the Lamb1-Itga6 axis or blood vessels impairs microglial entry and settlement.

Conclusions:

  • A conserved Lamb1-Itga6 signaling axis guides retinal microglial precursor migration during development.
  • Blood vessels play a critical role in delivering microglial precursors to the retina.
Keywords:
CP: cell biologyCP: neuroscienceItga6Lamb1blood vesselmicroglial precursorretina

More Related Videos

Culture of Adult Transgenic Zebrafish Retinal Explants for Live-cell Imaging by Multiphoton Microscopy11:55

Culture of Adult Transgenic Zebrafish Retinal Explants for Live-cell Imaging by Multiphoton Microscopy

Published on: February 24, 2017

9.1K
Transpupillary Two-Photon In Vivo Imaging of the Mouse Retina09:03

Transpupillary Two-Photon In Vivo Imaging of the Mouse Retina

Published on: February 13, 2021

5.0K

Related Concept Videos

Mechanism of Lamellipodia Formation01:31

Mechanism of Lamellipodia Formation

Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
3.5K
Cell Polarization by Rho Proteins01:21

Cell Polarization by Rho Proteins

Cell polarity is the asymmetric distribution of cellular and membrane components, making one side of the cell different from the other. This polarity is essential to many processes such as embryogenesis, axon migration, glucose transport across epithelial cells, and directional cell migration. A migrating cell responds to intracellular or extracellular signals via molecular cascades that reorganize the actin cytoskeleton to establish this polarity. In these cells, the Rho family proteins Cdc42,...
3.5K