Beneficial Effects of Paeoniflorin Enriched Extract on Blood Pressure Variability and Target Organ Damage in Spontaneously Hypertensive Rats.

Blood pressure variability (BPV) is associated with the development and progression of severe target organ damage (TOD). This study aims to evaluate the protective effect of paeoniflorin enriched extract from Radix Paeoniae Alba (PG) on BPV and TOD in spontaneously hypertensive rats (SHR). All SHR were orally treated with distilled water, metoprolol (MP, 20 mg/kg), and PG (PG-H, 90 mg/kg or PG-L, 30 mg/kg) for a single time or daily for 7 weeks. The 24-hour dynamic blood pressure was monitored and then calculated BPV including long- and short-term systolic blood pressure variability (SBPV), diastolic blood pressure variability (DBPV), mean blood pressure variability (MBPV), and heart rate variability (HRV) as well as the 24-hour-SBP, 24-hour-DBP, and 24-hour-MBP. The protective effects of PG on TOD were observed by histopathologic and biochemical detection. The results indicated that long- and short-term SBPV, DBPV, MBPV, and HRV as well as 24-hour-SBP, 24-hour-DBP, and 24-hour-MBP showed no significant changes after single-dose administration of PG and significantly decreased after administration with PG for 7 weeks. PG could also markedly improve the damage of aorta, heart, kidney, and brain. This study suggested that PG could notably reduce BPV, stabilize blood pressure, and mitigate TOD in SHR.

[Analysis on animal models of experimental hyperlipidemia].

Hyperlipidemia is a major risk factor for fatty liver, atherosclerosis, hyperviscosily, coronary artery disease and acute myocardial infarction. In recent years, the incidence of hyperlipidemia was gradually increased and showed younger trend. It has been a research hot point to study the etiology and pathogenesis of hyperlipidemia and develop a new drug reduced blood lipid. It is very important to prepare the animal model of hyperlipidemia for displaying the advantage of traditional Chinese medicine characteristic. However, the success of replicating animal model of hyperlipidemia is one of the key of research in experimental hyperlipidemia. The ideal animal model of hyperlipidemia should be similar to human disease, high repeatability, simple and high generalization. It will affect the reliability of the results and the accuracy of the whole experiment process to copy successfully animal models of hyperlipidemia. This review focused on the recent research progress on copying methods of animal models of experimental hyperlipidemia, which will provide reference and basis for the hypolipidemic developers who choose rationally and effectively replication methods of hyperlipidemia animal models.