Immunohistochemical Assay (IMAGE) Neural Regeneration Research Caption Immunohistochemical assay demonstrated that matrix metalloproteinase-9 expression increased in the infarct border zones of stroke-prone spontaneously hypertensive rats. Credit Neural Regeneration Research Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.