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Table 2 Protein concentrations in fresh activated platelet-rich plasma (PRP0) and liquid nitrogen frozen-thawed activated PRP (LN0)

From: The effect of four different freezing conditions and time in frozen storage on the concentration of commonly measured growth factors and enzymes in equine platelet-rich plasma over six months

  PRP0 LN0 LN0/PRP0 p-value
IGF-1 340 ± 21.5 ng/ml 333 ± 24.3 ng/ml 0.98 0.3141
PDGF-BB 6058 ± 696 pg/ml 4942 ± 397 pg/ml 0.85 0.1211
TGF-β1 4671 ± 896 pg/ml 4329 ± 911 pg/ml 0.92 † 0.0162
MMP-9 11,156 ± 2743 pg/ml 21,762 ± 3457 pg/ml 2.19 † 0.0021
  1. Values reported as mean (n = 6) ± standard error. (†) indicates significant difference between PRP0 and LN0 using a paired t-test, p < 0.05. Insulin-like growth factor (IGF-1), platelet-derived growth factor-BB (PDGF-BB), transforming growth factor-β1 (TGF-β1), matrix metalloproteinase-9 (MMP-9), fold-change of liquid nitrogen frozen-thawed activated PRP at time 0 to fresh activated PRP at time 0 (LN0/PRP0)