Effects of Mesenchymal Stem Cell Treatment on the Expression of Matrix Metalloproteinases and Angiogenesis during Ischemic Stroke Recovery.

Abstract

BACKGROUND:

The efficacy of mesenchymal stem cell (MSC) transplantation in ischemic stroke might depend on the timing of administration. We investigated the optimal time point of MSC transplantation. After MSC treatment, we also investigated the expression of matrix metalloproteinases (MMPs), which play a role in vascular and tissue remodeling.

METHODS:

Human bone marrow-derived MSCs (2 × 10(6), passage 5) were administrated intravenously after permanent middle cerebral artery occlusion (MCAO) was induced in male Sprague-Dawley rats. First, we determined the time point of MSC transplantation that led to maximal neurological recovery at 1 h, 1 day, and 3 days after MCAO. Next, we measured activity of MMP-2 and MMP-9, neurological recovery, infarction volume, and vascular density after transplanting MSCs at the time that led to maximal neurological recovery.

RESULTS:

Among the MSC-transplanted rats, those of the MSC 1-hour group showed maximal recovery in the rotarod test (P = 0.023) and the Longa score (P = 0.018). MMP-2 activity at 1 day after MCAO in the MSC 1-hour group was significantly higher than that in the control group (P = 0.002), but MMP-9 activity was not distinct. The MSC 1-hour group also showed smaller infarction volume and higher vascular density than did the control group.

CONCLUSIONS:

In a permanent model of rodent MCAO, very early transplantation of human MSCs (1 h after MCAO) produced greater neurological recovery and decreased infraction volume. The elevation of MMP-2 activity and the increase in vascular density after MSC treatment suggest that MSCs might help promote angiogenesis and lead to neurological improvement during the recovery phase after ischemic stroke.

• Authors: Hyo Suk Nam, Il Kwon, Bo Hyung Lee, Haejin Kim, Jayoung Kim, Sunho An, Ok-Hee Lee, Phil Hyu Lee, Hyun Ok Kim, Hyun Namgoong, Young Dae Kim, Ji Hoe Heo
• Journal: PloS one (PLoS One) Vol. 10 Issue 12 Pg. e0144218 ( 2015) ISSN: 1932-6203 [Electronic] United States
• PMID: 26637168 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Matrix Metalloproteinases

Topics

• Animals
• Brain Infarction (metabolism, physiopathology, therapy)
• Cells, Cultured
• Disease Models, Animal
• Humans
• Male
• Matrix Metalloproteinases (metabolism)
• Mesenchymal Stem Cell Transplantation (methods)
• Neovascularization, Pathologic (metabolism, therapy)
• Rats
• Rats, Sprague-Dawley
• Rotarod Performance Test
• Stroke (metabolism, physiopathology, therapy)
• Treatment Outcome