Correlation between pulmonary endothelin receptors and alveolar-arterial oxygen gradient in rats with hepatopulmonary syndrome.
- Author:
Mei, LIU
;
Dean, TIAN
;
Tiancai, WANG
;
Wangxian, TANG
;
Kuohuan, LIANG
- Publication Type:Journal Article
- MeSH:
Endothelin-1/metabolism;
Hepatopulmonary Syndrome/*metabolism;
Lung/*metabolism;
Oxygen/*metabolism;
Pulmonary Alveoli/*metabolism;
Rats, Wistar;
Receptor, Endothelin A/metabolism;
Receptor, Endothelin B/*metabolism
- From:
Journal of Huazhong University of Science and Technology (Medical Sciences)
2005;25(5):494-6
- CountryChina
- Language:English
-
Abstract:
The correlation between pulmonary endothelin receptors and alveolar-arterial oxygen gradient (A-aDO2) in rats with hepatopulmonary syndrome was investigated. Animals were divided into 2 groups: Sham-operated (Sham) group and common bile duct ligation (CBDL) group. Arterial blood gas was evaluated by a blood gas analyzer. The concentrations of ET-1 in blood and lung tissue sample were evaluated by radioimmunoassay. The distribution and expression of two kinds of subtype receptor of ET-1, ETRA and ETRB were examined by in situ hybridization. The results showed that the level of A-aDO2 was higher in CBDL group than that in Sham group (P < 0.05). The levels of plasma and pulmonary ET-1 in CBDL group were both higher than in Sham group (P < 0.05). There was no significant difference in average A of ETRA between two groups by imaging analysis (0.21 +/- 0.06 vs 0.22 +/- 0.08, P > 0.05), while that of ETRB was higher in CBDL group than in Sham group (0.58 +/- 0.16 vs 0.28 +/- 0.07, P < 0.05). The expression of ETRB in lung was positively correlated with A-aDO2 (P < 0.05). It was concluded that the widened A-aDO2 may be related with enhancement of the expression of ETRB in lung.
