Skip to main content
eScholarship
Open Access Publications from the University of California

Inhibition of protein glycosylation is a novel pro-angiogenic strategy that acts via activation of stress pathways.

  • Author(s): Zhong, Cuiling
  • Li, Pin
  • Argade, Sulabha
  • Liu, Lixian
  • Chilla', Anastasia
  • Liang, Wei
  • Xin, Hong
  • Eliceiri, Brian
  • Choudhury, Biswa
  • Ferrara, Napoleone
  • et al.
Abstract

Endothelial cell (EC) metabolism is thought to be one of the driving forces for angiogenesis. Here we report the identification of the hexosamine D-mannosamine (ManN) as an EC mitogen and survival factor for bovine and human microvascular EC, with an additivity with VEGF. ManN inhibits glycosylation in ECs and induces significant changes in N-glycan and O-glycan profiles. We further demonstrate that ManN and two N-glycosylation inhibitors stimulate EC proliferation via both JNK activation and the unfolded protein response caused by ER stress. ManN results in enhanced angiogenesis in a mouse skin injury model. ManN also promotes angiogenesis in a mouse hindlimb ischemia model, with accelerated limb blood flow recovery compared to controls. In addition, intraocular injection of ManN induces retinal neovascularization. Therefore, activation of stress pathways following inhibition of protein glycosylation can promote EC proliferation and angiogenesis and may represent a therapeutic strategy for treatment of ischemic disorders.

Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.

Main Content
Current View