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Table 1 Levels of the exogenous and endogenous oxidation biomarkers during the four stages of surgery (laparoscopic cholecystectomy)

From: Reappraisal of ischemia-reperfusion injury in a short duration laparoscopic surgery, a pilot study

  Stage
1 2 3 4
Endogenous markers
 7α-Hydroxylated cholesterol (7α-OH) 0.0 ± 0.0 4.661 ± 26.64 35.27 ± 62.81 −7.150 ± 21.84
  ns ns Ns
 7β-Hydroxylated cholesterol (7β-OH) 0.0 ± 0.0 46.47 ± 150.3 16.48 ± 89.68 −5.217 ± 99.05
  ns ns Ns
 5,6 α-epoxy cholesterol (α-epoxy) 0.0 ± 0.0 49.95 ± 162.5 −6.604 ± 113.5 18.14 ± 112.8
  ns P ≤ 0.0404 Ns
 5,6 β-epoxy cholesterol (β-epoxy) 0.0 ± 0.0 17.72 ± 126.1 16.49 ± 121.8 −0.7928 ± 102.9
  ns ns P ≤ 0.0337
 7-ketocholesterol 0.0 ± 0.0 25.27 ± 120.9 3.147 ± 80.84 −13.93 ± 51.65
  ns ns P ≤ 0.0482
 25-Hydroxylated cholesterol (25-OH) 0.0 ± 0.0 20.69 ± 112.6 33.70 ± 118.0 20.39 ± 77.54
  ns ns Ns
 27-Hydroxylated cholesterol (27-OH) 0.0 ± 0.0 28.48 ± 130.8 16.60 ± 132.3 10.37 ± 71.19
  ns ns Ns
Exogenous markers
 Oxidized N-linoleoyl tyrosine (hydroperoxide) (LT-OOH) 0.0 ± 0.0 16.09 ± 53.15 14.80 ± 76.74 18.64 ± 60.36
  ns ns Ns
 Oxidized N-linoleoyl tyrosine (epoxide)(LT-epoxy) 0.0 ± 0.0 12.25 ± 35.88 −3.805 ± 44.61 0.9652 ± 33.81
  ns ns Ns
 526 0.0 ± 0.0 34.22 ± 67.56 49.16 ± 94.02 19.20 ± 98.14
  ns ns Ns