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Table 6 Effects of dietary supplementation with 0 (control) or 0.4% L-arginine (Arg) between d 14 and d 30 of gestation on the concentrations of NOx and polyamines, NO and polyamine syntheses, and enzyme activities in the placentae of gilts

From: Dietary supplementation with 0.4% L-arginine between days 14 and 30 of gestation enhances NO and polyamine syntheses and water transport in porcine placentae

Variable

Control

0.4% Arg

Placental concentrations

 NOx, nmol/g tissue

46.6 ± 2.5

57.1 ± 2.9†

 Putrescine, nmol/g tissue

49.1 ± 2.0

60.5 ± 1.8*

 Spermidine, nmol/g tissue

99.4 ± 4.1

115 ± 3.0*

 Spermine, nmol/g tissue

101 ± 4.6

125 ± 4.1*

 Total polyamines, nmol/g tissue

250 ± 10

301 ± 8.2*

 BH4, pmol/g tissue

346 ± 15

419 ± 18*

 cAMP, pmol/g tissue

202 ± 9.4

258 ± 11*

 cGMP, pmol/g tissue

15.4 ± 0.8

19.2 ± 0.9*

Placental synthesis

 NO, nmol/g tissue/h

12.2 ± 0.48

15.4 ± 0.68*

 Putrescine, nmol/g tissue/h

0.58 ± 0.02

0.71 ± 0.03*

 Spermidine, nmol/g tissue/h

0.92 ± 0.05

1.16 ± 0.06*

 Spermine, nmol/g tissue/h

0.91 ± 0.06

1.26 ± 0.07*

 Total polyamines, nmol/g tissue/h

2.42 ± 0.11

3.12 ± 0.13*

Placental enzyme activity

 cNOS, nmol/g tissue/h

1.30 ± 0.08

1.42 ± 0.09

 iNOS, nmol/g tissue/h

0.43 ± 0.02

0.45 ± 0.03

 GTP-CH1, nmol/g tissue/h

1.57 ± 0.10

2.09 ± 0.14*

 ODC, nmol/g tissue/h

8.66 ± 0.57

11.2 ± 0.80†

  1. Data are means ± SEM, n = 10 gilts/treatment group. cNOS: constitutive NO synthase; GTP-CH1: GTP cyclohydrolase-I; iNOS: inducible NO synthase; NOx: oxidation end products (nitrite plus nitrate) of NO; ODC: ornithine decarboxylase; total polyamines: putrescine + spermidine + spermine
  2. †P < 0.05 vs. the control group
  3. *P < 0.01 vs. the control group