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Table 1 Vasodilator responses after organ culture

From: Organ culture: a new model for vascular endothelium dysfunction

  

n

pEC50 (-log M)

P

Rmax (%)

P

ACh

Control

10

7.5 ± 0.2

} n.s.

93 ± 1

} n.s.

 

Cultured

10

7.1 ± 0.1

 

93 ± 3

 

ACh, NO-mediated

Control

10

7.2 ± 0.2

} n.s.

84 ± 6

} <0.0001

 

Cultured

10

7.1 ± 0.2

 

36 ± 6

 

ACh, prostaglandin-mediated

Control

10

6.1 ± 0.4

} n.s.

48 ± 7

} <0.001

 

Cultured

10

6.6 ± 0.4

 

16 ± 4

 

ACh, EDHF-mediated

Control

10

7.1 ± 0.2

} n.s.

83 ± 3

} n.s.

 

Cultured

10

6.1 ± 0.5

 

80 ± 3

 

Forskolin

Control

7

7.1 ± 0.2

} n.s.

95 ± 1

} n.s.

 

Cultured

7

7.3 ± 0.2

 

97 ± 2

 

SNP

Control

9

8.8 ± 0.1

} n.s.

96 ± 1

} n.s.

 

Cultured

9

8.9 ± 0.2

 

93 ± 4

 
  1. Vasodilatation was assessed by cumulative addition of ACh, forskolin or SNP in the precontracted mesenteric artery branch, before and after organ culture for 20 h. NO-dilatation was studied in the presence of indomethacin (10 μM), charybdotoxin (50 nM) and apamin (1 μM); prostaglandin-dilatation in the presence of L-NOARG (0.1 mM), charybdotoxin and apamin; and EDHF-dilatation in the presence of indomethacin and L-NOARG. Dilatory responses are expressed as percentage of a precontraction induced by U46619. n denotes the number of experiments (animals). Statistical significance is expressed as P. Data are given as mean values ± S.E.M.