GHRP-2 Peptide Improves Tendon-Bone Healing and Reduces Inflammation in Rotator Cuff Tears

Approximately 50% of rotator cuff tear (RCT) repairs fail, often due to poor tendon-bone integration and persistent inflammation. M1 macrophages (a type of immune cell known for promoting inflammation) play a critical role in hindering effective tissue repair. Current therapeutic strategies often fall short in modulating this inflammatory response and enhancing the quality of tendon-bone healing, leaving a significant knowledge gap in improving long-term patient outcomes. This study investigates whether Growth Hormone-Releasing Peptide 2 (GHRP-2) can improve healing by modulating macrophage activity and enhancing tissue repair.

The study reported promising results indicating that GHRP-2 treatment was associated with significant improvements in the healing process. The most important finding was a notable decrease in the production of pro-inflammatory M1 macrophages at the injury site, suggesting a shift towards a more regenerative healing environment compared to the control group. This reduction in inflammation was coupled with enhanced histologic healing properties, implying better tissue organization and integration at the tendon-bone junction in the treated group. Furthermore, the GHRP-2-treated group demonstrated increased biomechanical tendon-bone healing properties, indicating improved strength and functional recovery. While specific numerical data, such as percentages of reduction in M1 macrophages or fold-changes in biomechanical strength, were not provided in the available record, the findings qualitatively point to a substantial positive effect of GHRP-2 on multiple healing parameters.