Skip to main content

Table 1 A. Basal values for cardiac contractility in papillary heart muscles of untreated and OB-treated non-diabetic rats and in untreated and OB-treated diabetic rats

From: Obestatin induced recovery of myocardial dysfunction in type 1 diabetic rats: underlying mechanisms

A

    
 

NON-DIABETIC

DIABETIC

 

CTRL ( n  = 6)

OB (n  = 5)

CTRL (n  = 6)

OB ( n  = 5)

 T max (mN/mm2)

50.3 ± 7.7

42.8 ± 8.4

13.4 ± 6.9***

60.2 ± 20.5†††

+ dT/dt max (mN/s)

15265 ± 1759

14043 ± 1527

5420 ± 847***

14688 ± 2165†††

- dT/dt max (mN/s)

7297 ± 874

6785 ± 645

4056 ± 953***

6333 ± 1135††

  TPT (ms)

133.3 ± 14.2

114.5 ± 13.6

111.9 ± 31.4

149.6 ± 9.0

 Duration (ms)

379.5 ±48.7

353.5 ± 20.2

361.7 ± 75.4

407.6 ± 26.2

B Isoproterenol (1 μM)

 

NON-DIABETIC

DIABETIC

 

CTRL ( n  = 6)

OB ( n  = 5)

CTRL ( n  = 6)

OB ( n  = 5)

  T max %

189.7 ± 27.8

197.3 ± 48.0

123.8 ± 18.0**

183.2 ± 22.7††

 + dT/dt max %

192.7 ± 40.6

205.0 ± 39.2

127.3 ± 16.8**

190.0 ± 31.0††

 - dT/dt max %

250.3 ± 28.1

227.6 ± 28.4

126.0 ± 14.2***

187.6 ± 31.1††

  TPT%

85.0 ± 2.4

86.6 ± 5.9

97.8 ± 4.1***

90.8 ± 3.3††

 Duration%

83.3 ± 3.4

85.5 ± 10.6

95.6 ± 5.8

90.0 ± 6.8

  1. B. Effect of Iso (1 μM) on cardiac contractility. Value expressed as % variation respect to control (before Iso). Papillary muscles did not significantly differ in size among the different groups (diameter: 0.78 ± 0.08, 0.81 ± 0.12, 1.23 ± 0.15 and 1.18 ± 0.09 mm, respectively).
  2. Values are expressed as means ± SD. Statistical significance: ** P < 0.01vs ND-CTRL; *** P < 0.001 vs ND-CTRL; †† P < 0.01 vs DM-CTRL; ††† P < 0.001 vs DM-CTRL.