JIA Qiang,YIN Qiming,LI Yunlun,et al.Establishment and Metabolomics Analysis of Rat Model of High-normal Blood Pressure with Excessive Phlegm-dampness Syndrome[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(24):171-178.
JIA Qiang,YIN Qiming,LI Yunlun,et al.Establishment and Metabolomics Analysis of Rat Model of High-normal Blood Pressure with Excessive Phlegm-dampness Syndrome[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(24):171-178. DOI: 10.13422/j.cnki.syfjx.20220460.
Establishment and Metabolomics Analysis of Rat Model of High-normal Blood Pressure with Excessive Phlegm-dampness Syndrome增强出版
To construct the rat model of high-normal blood pressure with excessive phlegm-dampness syndrome and analyze the serum metabolites and explain the metabolic characteristics of the model rats.
Method
2
The model rats of high-normal blood pressure with excessive phlegm-dampness syndrome were fed with high-fat diet and intraperitoneal injected with 7.625 mg·kg
-1
of
Nω
-nitro-
L
-arginine (
L
-NNA), while rats in the normal group were fed chow diet and injected with the same amount of normal saline. The model was evaluated from the aspects of the general state, body weight, blood pressure and serum biochemical indexes, such as triglyceride (TG), total cholesterol (TC), high density lipoprotein cholesterol (HDL-C), low density lipoprotein cholesterol (LDL-C), blood glucose, malondialdehyde (MDA) and glutathione peroxidase (GSH-Px). Liquid chromatography-mass spectrometry was used to analyze the changes of metabolites in rats serum. The conditions were as follows:mobile phase of 0.05% formic acid aqueous solution (A)-0.05% formic acid acetonitrile solution (B) for gradient elution (0-3 min, 2%B; 3-9 min, 2%-40%B; 9-18 min, 40%-98%B), electrospray ionization (ESI), positive and negative ion detection modes, acquisition range of
m
/
z
80-1 000. Univariate and multivariate statistical analysis were used to screen the differential metabolites between groups which were used to metabolic pathways enrichment analysis.
Result
2
Compared with the normal group, the rats in the model group had the characteristics of darker fur, lazy movement and loose stools, the body weight, blood glucose and contents of TG, TC, LDL-C, MDA increased significantly (
P
<
0.05,
P
<
0.01) and GSH-Px level decreased significantly (
P
<
0.01), the blood pressure remained stable at about 160/88 mmHg (1 mmHg≈0.133 kPa). A total of 115 differential metabolites were screened in the positive and negative ion modes, of which 45 were up-regulated and 70 were down-regulated [variable importance in the projection (VIP) value
>
1,
P
<
0.05 and fold change (FC)≥2], including indoleacetaldehyde, 5-hydroxytryptamine, lysophosphatidylcholine, phosphatidylcholine, xanthine and so on, which regulated blood pressure mainly through glycerophospholipid metabolism, linoleic acid metabolism, tryptophan metabolism and arachidonic acid metabolic pathways.
Conclusion
2
Feeding with high-fat diet and intraperitoneal injection of
L
-NNA can successfully construct the rat model of high-normal blood pressure with excessive phlegm-dampness syndrome, and indoleacetaldehyde, 5-hydroxytryptamine, lysophosphatidylcholine, phosphatidylcholine and xanthine can be used as characteristic serum differential metabolites of the rat model.
关键词
Keywords
references
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