Secretome of hypoxia-preconditioned mesenchymal stem cells enhance the expression of HIF-1a and bFGF in a rotator cuff tear model.

Aim To determine the effect of secretome hypoxia mesenchymal stem cells (SH-MSCs) on the relative gene expression of hypoxia inducible factor-1a (HIF-1a) and basic fibroblast growth factor (bFGF) in accelerating histomorphometric repair of tendon to bone interface healing in rats acute rotator cuff tear (RCT) model. Methods This is experimental research with posttest control group design. Thirty-male Wistar rats were divided into five treatment groups: healthy group and rotator cuff reconstruction group included four groups: SH-MSCs W2 (the treatment group was given a SH-MSCs 0.5 mL and terminated at weeks 2), NaCl W2 (the control vehicle group was given NaCl 0.5 mL and terminated at weeks 2), SH-MSCs W8 (the treatment group was given a SH-MSCs 0.5 mL and terminated at weeks 8), and NaCl W8 (the control vehicle group was given NaCl 0.5 mL and terminated at weeks 8). On the termination day, all the rats were terminated and HIF-1a and bFGF gene expression were analysed using qRT-PCR. Results SH-MSCs significantly increased the HIF-1a and bFGF gene expression than NaCl group even in week 2 and week 8. The highest increased gene expression of HIF-1a and bFGF was on week 8. Conclusion SH-MSCs are important in the healing repair process of tendon-to-bone interface in acute RCT model rats through increasing gene expression of HIF-1α and bFGF.