Background
Methods
Animals and reagents
Induction of MI and medications
Echocardiography
Haemodynamic measurements
Tissue sampling
Statistical analysis
Results
Effects of ASI on the LV functions
Group | Dose (mg/kg/day) | Normal | Before treatment | After treatment | |
---|---|---|---|---|---|
1 week | 2 weeks | ||||
Sham | - | 73.0 ± 5.7 | 68.8 ± 6.5 | 70.9 ± 3.4 | 66.1 ± 8.0 |
Model | - | 68.8 ± 10.1 (0.2193) | 30.8 ± 5.0+++ | 26.1 ± 6.6+++ | 22.7 ± 7.6+++ |
ASI | 0.1 | 72.8 ± 3.6 (0.2417) | 28.9 ± 4.6 (0.4213) | 34.2 ± 7.5* (0.0163) | 27.4 ± 7.8 (0.2620) |
ASI | 0.3 | 72.1 ± 9.6 (0.3329) | 28.8 ± 6.9 (0.3973) | 41.5 ± 11.3*** | 28.8 ± 8.9 (0.1474) |
ASI | 1.0 | 68.4 ± 6.7 (0.9061) | 31.7 ± 2.5 (0.7024) | 42.9 ± 7.7*** | 35.8 ± 13.2** (0.0028) |
Quinapril | 1.0 | 70.1 ± 7.5 (0.7016) | 30.2 ± 4.7 (0.7989) | 42.4 ± 4.7*** | 31.4 ± 8.8* (0.0411) |
Group | Dose (mg/kg/day) | +dp/dt (mmHg/s) | -dp/dt (mmHg/s) |
---|---|---|---|
Sham | - | 3454 ± 774 | 3706 ± 517 |
Model | - | 2216 ± 800+++ | 1922 ± 672+++ |
ASI | 0.1 | 2459 ± 524 (0.3679) | 2362 ± 610 (0.0710) |
ASI | 0.3 | 2838 ± 420* (0.0246) | 2699 ± 425** (0.0021) |
ASI | 1.0 | 3066 ± 630** (0.0027) | 2776 ± 578*** |
Quinapril | 1.0 | 2847 ± 251* (0.0228) | 2601 ± 310** (0.0065) |
Effects of ASI on LV dimensions
After treatment | ||||||
---|---|---|---|---|---|---|
Group | Dose (mg/kg/day) | Normal | Before treatment | 1 week | 2 weeks | |
Sham | - | 4.8 ± 1.0 | 5.2 ± 1.3 | 5.2 ± 0.7 | 5.2 ± 0.9 | |
Model | - | 4.8 ± 1.2 (0.9549) | 7.0 ± 1.1++ (0.0046) | 7.5 ± 0.4+++ | 7.1 ± 0.7+++ | |
LVIDd (mm) | ASI | 0.1 | 5.0 ± 0.8 (0.6785) | 6.9 ± 1.2 (0.9603) | 6.9 ± 1.0 (0.1601) | 6.5 ± 1.1 (0.1109) |
ASI | 0.3 | 4.5 ± 1.2 (0.5850) | 6.2 ± 1.9 (0.1946) | 6.7 ± 1.7 (0.0547) | 6.0 ± 0.9** (0.0057) | |
ASI | 1.0 | 4.7 ± 1.5 (0.7629) | 6.4 ± 1.3 (0.3389) | 6.5 ± 0.8* (0.0193) | 6.0 ± 0.5**$ (0.0046) | |
Quinapril | 1.0 | 5.1 ± 1.2 (0.6512) | 6.6 ± 1.1 (0.5964) | 6.7 ± 0.8 (0.0574) | 6.7 ± 0.9 (0.3837) | |
Sham | - | 1.3 ± 0.4 | 1.6 ± 0.4 | 1.5 ± 0.3 | 1.8 ± 0.5 | |
Model | - | 1.5 ± 0.5 (0.4268) | 4.8 ± 1+++ | 5.6 ± 0.8+++ | 5.5 ± 0.8+++ | |
LVIDs (mm) | ASI | 0.1 | 1.4 ± 0.3 (0.8811) | 4.9 ± 0.9 (0.8356) | 4.5 ± 0.9* (0.0112) | 4.7 ± 0.9* (0.0447) |
ASI | 0.3 | 1.2 ± 0.4 (0.1827) | 4.5 ± 1.6 (0.3955) | 4.0 ± 1.6*** | 4.3 ± 1.0** (0.0027) | |
ASI | 1.0 | 1.4 ± 0.4 (0.6903) | 4.4 ± 0.8 (0.3353) | 3.7 ± 0.7*** | 3.8 ± 1.0***$ | |
Quinapril | 1.0 | 1.6 ± 0.7 (0.5180) | 4.6 ± 0.7 (0.6125) | 3.9 ± 0.6*** | 4.8 ± 0.8 (0.0595) |
Effects of ASI on haemodynamics
Group | Dose (mg/kg/day) | LVSP (mmHg) | LVEDP (mmHg) | Wall stress (g/cm2) |
---|---|---|---|---|
Sham | - | 111.8 ± 12.1 | -0.7 ± 5.8 | 47.7 ± 17.6 |
Model | - | 88.5 ± 14.0+++ | 13.9 ± 5.4+++ | 125.9 ± 28.0+++ |
ASI | 0.1 | 101.4 ± 18.5* (0.0367) | 10.6 ± 3.6 (0.1629) | 120.4 ± 31.9 (0.6563) |
ASI | 0.3 | 101.6 ± 9.0* (0.0340) | 9.8 ± 5.3 (0.0848) | 108.3 ± 24.5 (0.1613) |
ASI | 1.0 | 100.2 ± 8.4$$ (0.0571) | 6.2 ± 4.2** (0.0018) | 97.9 ± 29.8* (0.0283) |
Quinapril | 1.0 | 84.0 ± 15.5 (0.4566) | 3.5 ± 6.3*** | 95.1 ± 31.7* (0.0167) |
Effects of ASI on myocardial hypertrophy
Group | Dose (mg/kg/day) | LA wt/TL (mg/mm) | LV wt/TL (mg/mm) | RA wt/TL (mg/mm) | RV wt/TL (mg/mm) | Tibial length (mm) | Body weight (g) |
---|---|---|---|---|---|---|---|
Sham | - | 1.3 ± 0.6 | 20.3 ± 3.1 | 1.8 ± 0.6 | 5.5 ± 1.5 | 37.25 ± 1.23 | 290.2 ± 23.2 |
Model | - | 2.8 ± 0.7+++ | 24.9 ± 2.1+++ | 2.6 ± 0.5+++ | 8.1 ± 1.5+++ | 38.20 ± 1.70 | 280.1 ± 24.3 |
- | - | (0.1879) | (0.3439) | ||||
ASI | 0.1 | 2.4 ± 0.4 | 22.7 ± 2.8 | 2.5 ± 0.4 | 7.1 ± 1.0 | 38.96 ± 1.28 | 271.2 ± 18.0 |
(0.1855) | (0.0862) | (0.6751) | (0.1031) | (0.2723) | (0.4038) | ||
ASI | 0.3 | 2.5 ± 0.7 | 22.6 ± 4.0 | 2.5 ± 0.5 | 7.1 ± 1.2 | 37.23 ± 1.36 | 287.9 ± 31.6 |
(0.2280) | (0.0796) | (0.7632) | (0.099) | (0.1811) | (0.4639) | ||
ASI | 1.0 | 2.1 ± 0.6* | 21.0 ± 2.6** | 2.0 ± 0.7* | 6.1 ± 1.3** | 37.89 ± 1.28 | 294.5 ± 15.7 |
(0.015) | (0.0031) | (0.0186) | (0.0017) | (0.6827) | (0.1794) | ||
Quinapril | 1.0 | 2.0 ± 0.8** | 22.0 ± 1.8* | 2.0 ± 0.6* | 7.2 ± 1.8 | 38.13 ± 2.27 | 280.1 ± 25.6 |
(0.0076) | (0.0255) | (0.0223) | (0.1485) | (0.9434) | (1.0) |
Effects of ASI on myocardial apoptosis and Bax
Group | Dose (mg/kg/day) | Apoptotic cell | Bax protein |
---|---|---|---|
Sham | - | 3.0 ± 2.2 | 1.6 ± 1.3 |
Model | - | 54.0 ± 10.2+++ | 30.2 ± 8.8+++ |
ASI | 0.1 | 37.8 ± 8.6*** | 24.3 ± 7.1* |
ASI | 0.3 | 17.0 ± 8.4*** | 8.4 ± 5.3*** |
ASI | 1.0 | 8.0 ± 5.6*** | 7.3 ± 3.4*** |
Quinapril | 1.0 | 10.4 ± 6.4*** | 12.0 ± 5.5*** |