Full
Outline
To compare the intestinal injury induced by different intensities of waveshock in rats exposed to extremely cold environment and to preliminarily explore the characteristics of the injury.
Sixty healthy male SD rats (2 months old, weighing 200~250 g) were randomly divided into 6 groups(n=10): blank control group, low-temperature control group, 5.0 MPa shock control group, and low-temperature+4.0, 4.5 and 5.0 MPa shock groups. The rats in the experimental groups were pre-treated in a -10 ℃ low-temperature environment for 30 min and then subjected to intestinal injury by using BST-I biological shock tube with different driving pressures. At 3, 8, and 24 h after injury, the serum levels of IL-6, TNF-α, intestinal fatty acid binding protein (I-FABP), and diamine oxidase (DAO) were detected, and the survival of rats within 24 h was recorded. At 24 h after injury, the rats were anesthetized and dissected, the characteristics of intestinal injury were observed, and pathological examination was performed. The differences of intestinal injury were compared among the 6 groups to explore the characteristics of intestinal injuries after different intensities of shockwave in rats after exposure to extremely cold environment.
Compared with the blank control group, the other 5 groups exhibited different severities of intestinal injury, and the rats in the low-temperature+ different shock groups were more prone to intestinal edema and trauma. The mortality rate was significantly increased in the low-temperature+5.0 MPa shock group (P<0.05). Pathological and serological studies found that dual effects of very cold environment and blast injury resulted in intestinal mucosal hemorrhage, edema, and disintegration of lamina propria in the experimental rats. The indicators of intestinal mucosal injury and intestinal inflammatory factors were also significantly increased when compared with the blank control group, and significant differences were among the groups with increment of shock intensity (P<0.05).
Exposure to very cold environment combined with abdominal blast injury increases mortality rate in rats, manifested by elevated serological indicators and intestinal inflammatory factors, as well as varying severities of intestinal wall edema and submucosal bleeding. Furthermore, the severity of the injury is positively related to the impact intensity, with worsened as the impact intensity increasing.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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