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Table 4 Effects of post-thawing incubation time on sperm functionality parameters at different evaluation times

From: Determination of double- and single-stranded DNA breaks in bovine sperm is predictive of their fertilizing capacity

 Items

T = 0 h

T = 2 h

T = 4 h

P-value

Mean ± SD

Mean ± SD

Mean ± SD

Intracellular superoxides

 Sperm with high superoxides, %E+

47.94 ± 9.09

54.26 ± 8.51*

55.78 ± 9.33*

< 0.01

  Viable sperm with high superoxides, %E+/YO-PRO-1−

4.04 ± 2.87

3.03 ± 1.60

0.85 ± 0.62*#

< 0.01

  Viable sperm with low superoxides, %E−/YO-PRO-1−

47.31 ± 8.78

43.31 ± 8.18*

41.60 ± 9.08*

< 0.01

  Non-viable sperm with high superoxides, %E+/YO-PRO-1+

43.91 ± 8.75

51.23 ± 8.83*

54.93 ± 9.56*

< 0.01

  Non-viable sperm with low superoxides, %E−/YO-PRO-1+

4.75 ± 3.78

2.43 ± 0.57*

2.62 ± 0.75*

< 0.05

Intracellular ROS

 Sperm with high ROS, %DCF+

6.13 ± 4.83

4.51 ± 3.24

2.44 ± 2.31*#

< 0.01

  Viable sperm with high ROS, %DCF+/PI−

5.61 ± 4.79

3.96 ± 3.24

1.91 ± 2.30*#

< 0.01

  Viable sperm with low ROS, %DCF−/PI−

44.84 ± 10.31

36.69 ± 9.58*

33.91 ± 12.98*

< 0.0001

  Non-viable sperm with high ROS, %DCF+/PI+

0.52 ± 0.09

0.55 ± 0.08

0.53 ± 0.08

n.s.

  Non-viable sperm with low ROS, %DCF−/PI+

49.03 ± 10.82

58.79 ± 8.90*

63.65 ± 13.23*#

< 0.0001

Intracellular calcium

 Sperm with high intracellular calcium, %F3+

59.66 ± 18.09

79.00 ± 10.28*

89.26 ± 9.27*#

< 0.01

  Viable sperm with high intracellular calcium, %F3+/PI−

13.46 ± 13.84

23.06 ± 11.60

27.88 ± 14.50*#

< 0.05

  Viable sperm with low intracellular calcium, %F3−/PI−

37.42 ± 16.94

20.07 ± 9.92*

10.19 ± 9.02*#

< 0.001

  Non-viable sperm with high intracellular calcium, %F3+/PI+

46.20 ± 9.69

55.94 ± 8.49*

61.38 ± 10.70*#

< 0.001

  Non-viable sperm with low intracellular calcium, %F3−/PI+

2.92 ± 2.37

0.93 ± 0.83*

0.56 ± 0.39*

< 0.001

  1. n.s. non-statistically significant differences
  2. *Differences compared to 0 h (P < 0.05)
  3. #Differences compared to 2 h (P < 0.05)