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Table 4 Intramuscular Adaptations and MHC mRNA Expression

From: Effects of arachidonic acid supplementation on training adaptations in resistance-trained males

Marker

AA (n = 15)

PLA (n = 16)

Significance

Total protein (μg·g-1)

  

Group: 0.92

   Day 0

7.5 ± 4.5

6.6 ± 3.8

Time: 0.28

   Day 50

7.0 ± 4.5

8.2 ± 4.3a,b

G × T: 0.05

FP receptor (INT·mm2·mg-1)

  

Group: 0.63

   Day 0

1,929 ± 1,395

2,253 ± 1,309

Time: 0.13

   Day 50

2,425 ± 1,746

2,518 ± 992

G × T: 0.64

EP3 receptor (INT·mm2·mg-1)

  

Group: 0.55

   Day 0

5,990 ± 3,563

6,854 ± 3,287

Time: 0.11

   Day 50

7,149 ± 3,383

7,529 ± 2,791

G × T: 0.66

MHC I protein (ng·ml-1)

  

Group: 0.78

   Day 0

187.8 ± 180.7

172.8 ± 123.0

Time: 0.64

   Day 50

176.3 ± 104.4

164.3 ± 126.6

G × T: 0.96

MHC IIa protein (ng·ml-1)

  

Group: 0.84

   Day 0

184.4 ± 217.1

156.9 ± 84.5

Time: 0.009

   Day 50

305.0 ± 366.3

295.8 ± 328.5

G × T: 0.84

MHC IIx protein (ng·ml-1)

  

Group: 0.55

   Day 0

128.7 ± 79.1

133.6 ± 83.5

Time: 0.23

   Day 50

103.9 ± 68.2

131.9 ± 81.7

G × T: 0.29

MHC I mRNA

  

Group: 0.45

   Day 0

0.69 ± 0.16

0.68 ± 0.14

Time: 0.70

   Day 50

0.64 ± 0.07

0.71 ± 0.15

G × T: 0.14

MHC IIa mRNA

  

Group: 0.32

   Day 0

0.66 ± 0.12

0.66 ± 0.14

Time: 0.55

   Day 50

0.63 ± 0.07

0.71 ± 0.13

G × T: 0.08

MHC IIx mRNA

  

Group: 0.42

   Day 0

0.66 ± 0.14

0.65 ± 0.15

Time: 0.98

   Day 50

0.62 ± 0.07

0.69 ± 0.14

G × T: 0.10

  1. Values are expressed as means ± SD.
  2. AA: Arachidonic acid, PLA: placebo, INT: integrated density units, MHC: myosin heavy chain.
  3. aSignificant within-group difference from baseline values, p < 0.05.
  4. bSignificant group × time (G × T) interaction, p < 0.05