Ji Young Oh1,2, Gee Euhn Choi2, Hyun Jik Lee2, Young Hyun Jung2, So Hee Ko2, Chang Woo Chae2, Jun Sung Kim2, Seo Yihl Kim2, Jae Ryong Lim2, Chang-Kyu Lee1,3, Ho Jae Han2. 1. Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea. 2. Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, and BK21 PLUS Program for Creative Veterinary Science Research, Seoul National University, Seoul, Republic of Korea. 3. Institute of Green Bio Science and Technology, Seoul National University, Pyeong Chang, Seoul, Republic of Korea.
Abstract
BACKGROUND/AIMS: Glucose plays an important role in stem cell fate determination and behaviors. However, it is still not known how glucose contributes to the precise molecular mechanisms responsible for stem cell migration. Thus, we investigate the effect of glucose on the regulation of the human umbilical cord blood-derived mesenchymal stem cell (hUCB-MSC) migration, and analyze the mechanism accompanied by this effect. METHODS: Western blot analysis, wound healing migration assays, immunoprecipitation, and chromatin immunoprecipitation assay were performed to investigate the effect of high glucose on hUCB-MSC migration. Additionally, hUCB-MSC transplantation was performed in the mouse excisional wound splinting model. RESULTS: High concentration glucose (25 mM) elicits hUCB-MSC migration compared to normal glucose and high glucose-pretreated hUCB-MSC transplantation into the wound sites in mice also accelerates skin wound repair. We therefore elucidated the detailed mechanisms how high glucose induces hUCB-MSC migration. We showed that high glucose regulates E-cadherin repression through increased Snail and EZH2 expressions. And, we found high glucose-induced reactive oxygen species (ROS) promotes two signaling; JNK which regulates γ-secretase leading to the cleavage of Notch proteins and PI3K/Akt signaling which enhances GSK-3β phosphorylation. High glucose-mediated JNK/Notch pathway regulates the expression of EZH2, and PI3K/Akt/GSK-3β pathway stimulates Snail stabilization, respectively. High glucose enhances the formation of EZH2/Snail/HDAC1 complex in the nucleus, which in turn causes E-cadherin repression. CONCLUSION: This study reveals that high glucose-induced ROS stimulates the migration of hUCB-MSC through E-cadherin repression via Snail and EZH2 signaling pathways.
BACKGROUND/AIMS: Glucose plays an important role in stem cell fate determination and behaviors. However, it is still not known how glucose contributes to the precise molecular mechanisms responsible for stem cell migration. Thus, we investigate the effect of glucose on the regulation of the human umbilical cord blood-derived mesenchymal stem cell (hUCB-MSC) migration, and analyze the mechanism accompanied by this effect. METHODS: Western blot analysis, wound healing migration assays, immunoprecipitation, and chromatin immunoprecipitation assay were performed to investigate the effect of high glucose on hUCB-MSC migration. Additionally, hUCB-MSC transplantation was performed in the mouse excisional wound splinting model. RESULTS: High concentration glucose (25 mM) elicits hUCB-MSC migration compared to normal glucose and high glucose-pretreated hUCB-MSC transplantation into the wound sites in mice also accelerates skin wound repair. We therefore elucidated the detailed mechanisms how high glucose induces hUCB-MSC migration. We showed that high glucose regulates E-cadherin repression through increased Snail and EZH2 expressions. And, we found high glucose-induced reactive oxygen species (ROS) promotes two signaling; JNK which regulates γ-secretase leading to the cleavage of Notch proteins and PI3K/Akt signaling which enhances GSK-3β phosphorylation. High glucose-mediated JNK/Notch pathway regulates the expression of EZH2, and PI3K/Akt/GSK-3β pathway stimulates Snail stabilization, respectively. High glucose enhances the formation of EZH2/Snail/HDAC1 complex in the nucleus, which in turn causes E-cadherin repression. CONCLUSION: This study reveals that high glucose-induced ROS stimulates the migration of hUCB-MSC through E-cadherin repression via Snail and EZH2 signaling pathways.
Authors: Yasser Basmaeil; Manar Al Rashid; Tanvir Khatlani; Manal AlShabibi; Eman Bahattab; Meshan L Abdullah; Fawaz Abomaray; Bill Kalionis; Safia Massoudi; Mohammad Abumaree Journal: Tissue Eng Regen Med Date: 2020-02-19 Impact factor: 4.169