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Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
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Related Experiment Video

Updated: Jan 30, 2026

Isolation and Culture of Primary Retinal Müller Cells from Sprague-Dawley (SD) Rats
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Müller cells in pathological retinal angiogenesis.

Xiaorui Li1, Jing Liu2, Josephine Hoh3

  • 1Medical Research Center, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, Shandong, China; Taishan Medical College, Taian, China.

Translational Research : the Journal of Laboratory and Clinical Medicine
|January 15, 2019
PubMed
Summary

Müller cells contribute to retinal angiogenesis by producing proangiogenic factors and downregulating antiangiogenic factors, especially under pathological conditions like hypoxia. Targeting Müller cells offers a potential therapeutic strategy for retinal vascular diseases.

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Area of Science:

  • Ophthalmology
  • Cell Biology
  • Molecular Biology

Background:

  • Müller cells are crucial glial cells maintaining retinal structure.
  • Pathological conditions activate Müller cells, promoting retinal angiogenesis.
  • Retinal angiogenesis involves the formation of new blood vessels from existing ones.

Purpose of the Study:

  • To review the molecular mechanisms underlying Müller cell-mediated retinal angiogenesis.
  • To discuss the role of Müller cells in pathological retinal angiogenesis.
  • To explore Müller cells as potential therapeutic targets for retinal angiogenesis.

Main Methods:

  • Literature review of molecular mechanisms.
  • Analysis of signaling pathways in Müller cells.
  • Investigation of proangiogenic and antiangiogenic factor expression.

Main Results:

  • Müller cells produce proangiogenic factors (VEGF, FGF, MMPs, Netrin-4, Angptl4) in response to hypoxia, high glucose, and inflammation.
  • Müller cell proliferation and dedifferentiation contribute to retinal angiogenesis.
  • Expression of antiangiogenic factors is reduced in Müller cells during pathological angiogenesis.

Conclusions:

  • Müller cells play a significant role in retinal angiogenesis through complex molecular signaling.
  • Understanding these mechanisms highlights Müller cells as a promising therapeutic target for treating retinal vascular diseases.