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Table 4 Selected fatty acids in liver lipids at 42 DIM and 105 DIM of supplementation

From: A commonly used rumen-protected conjugated linoleic acid supplement marginally affects fatty acid distribution of body tissues and gene expression of mammary gland in heifers during early lactation

Fatty acid [% FAME]

Period 1 (42 DIM)

Period 2 (105 DIM)

 

CON

CLA

CON

CLA

 

Mean ± SD

Mean ± SD

Mean ± SD

Mean ± SD

14:0

1.18 ± 0.69

1.46 ± 0.43

0.69 ± 0.24

0.67 ± 0.17

c 9-14:1

0.19 ± 0.13

0.18 ± 0.14

0.16 ± 0.11

0.07 ± 0.08

16:0

14.37 ± 4.59

13.95 ± 1.92

10.93 ± 1.54

11.42 ± 3.75

c 9-16:1

1.35 ± 0.77

1.36 ± 0.46

0.76 ± 0.31

0.65 ± 0.31

18:0

28.41 ± 4.93

28.44 ± 2.35

32.34 ± 1.16

31.47 ± 4.48

t 6/t 7/t 8-18:1

0.03 ± 0.02

0.05 ± 0.01

0.04 ± 0.01

0.05 ± 0.03

t 9-18:1

0.13 ± 0.02

0.16 ± 0.02

0.15 ± 0.03

0.16 ± 0.07

t 10-18:1

0.08 ± 0.02

0.15 ± 0.02*

0.08 ± 0.03

0.30 ± 0.42

t 11-18:1

0.56 ± 0.11

0.74 ± 0.13

0.49 ± 0.08

0.80 ± 0.52

t 12-18:1

0.22 ± 0.08

0.31 ± 0.04

0.24 ± 0.04

0.27 ± 0.03

t 13/t 14-18:1

0.60 ± 0.44

0.50 ± 0.14

0.79 ± 0.05

0.62 ± 0.38

c 9-18:1

15.31 ± 4.49

14.21 ± 2.28

11.96 ± 0.81

12.10 ± 5.46

c 11-18:1

1.79 ± 0.10

1.92 ± 0.12

1.56 ± 0.15

1.60 ± 0.30

c 12-18:1

0.18 ± 0.02

0.29 ± 0.05*

0.18 ± 0.04

0.27 ± 0.07*

c 13-18:1

0.15 ± 0.01

0.17 ± 0.05

0.19 ± 0.04

0.16 ± 0.06

18:2 n-6

9.04 ± 0.67

9.93 ± 0.25*

9.06 ± 1.17

11.13 ± 1.12*

18:3 n-3

0.83 ± 0.30

0.99 ± 0.27

0.58 ± 0.09

0.79 ± 0.23

20:4 n-6

5.43 ± 0.75

5.37 ± 1.05

6.10 ± 0.72

6.02 ± 0.58

20:5 n-3

1.50 ± 0.47

1.55 ± 0.21

1.24 ± 0.13

1.29 ± 0.43

22:5 n-3

3.70 ± 0.81

3.76 ± 0.58

4.12 ± 0.44

4.12 ± 0.97

22:6 n-3

0.62 ± 0.09

0.79 ± 0.11*

0.43 ± 0.07

0.53 ± 0.14

CLA

  c 9,t 11-CLA

0.24 ± 0.10

0.29 ± 0.07

0.19 ± 0.06

0.26 ± 0.13

  t 10,c 12-CLA

ND

ND

ND

ND

  Other CLA

0.14 ± 0.10

0.12 ± 0.05

0.16 ± 0.02

0.10 ± 0.06

Summations

  ∑ SFA

48.95 ±1.11

49.08 ± 0.57

49.08 ± 0.97

48.62 ± 1.75

  ∑ MUFA

22.03 ± 5.11

21.58 ± 3.03

17.99 ± 1.21

18.57 ± 5.26

  ∑ PUFA n-3

7.71 ± 1.41

8.34 ± 0.48

7.68 ± 0.66

7.84 ± 1.58

  ∑ PUFA n-6

20.92 ± 3.74

20.59 ± 2.30

24.90 ± 1.26

24.60 ± 2.77

  ∑ PUFA incl. CLA

29.02 ± 4.96

29.34 ± 2.50

32.93 ± 1.79

32.81 ± 3.89

  ∑ trans-18:1

2.10 ± 0.43

2.51 ± 0.17

2.42 ± 0.17

2.95 ± 1.33

Ratio

  c 9-14:1/14:0

0.18 ± 0.12

0.11 ± 0.06

0.21 ± 0.11

0.11 ± 0.10

  1. Cows in the control (CON) group (n = 5) of each period received a control fat supplement, in which the CLA were substituted with stearic acid. Cows in the conjugated linoleic acid (CLA) group (n = 5) of each period consumed 6 g/d each of trans-10,cis-12 CLA and cis-9,trans-11 CLA.
  2. *Means ± SD for each period are defined significant (P < 0.05).
  3. ND not detected.