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[Effect of hawthorn flavanone on blood-fat and expression of lipogenesis and lipolysis genes of hyperlipidemia model mouse].

OBJECTIVE
In order to investigate the possible mechanism of its function to degrade lipid, we detect the effects of hawthorn flavanone to the influence on blood-fat levels and adipogenesis genes transcription expression in fat and muscle tissue of hyperlipoidemia mouse.


METHOD
In this experiment, a total of 48 mouse were randomised to four groups and irrigated with two different concentrations (1.5 g kg(-1) body weight and 3.0 g kg(-1) body weight) of hawthorn flavanone, and killed in 0 h, 1 h, 2 h and 4 h. To estimate the content of TC, TG and HCL-C in blood: Total RNA was isolated from adipose and muscle, Real-time RT-PCR was used to analyze expression changes of adipogenesis genes (SREBP-1c, FAS, HSL and TGH) with time series; to analyze the correlation between TG in blood and some kinds of adipogenesis genes and the ratio of FAS/HARMEAN (HSL, TGH) mRNA in adipose.


RESULT
Hawthorn flavanone was able to cut down the level ofTC, TG and HDL significantly in blood and achieved the lowest level at 1 h. In adipose tissue, hawthorn flavanone up-regulated FAS, HSL and TGH, and achieved the level of significance (P<0.05), the expression level of FAS and TGH was ascend after 1 h, but HSL descend. The expression level of SREBP-1c was descend rapidly and achieved the level of significance after treating with hawthorn flavanone at 1 h (P<0.05), after that it rise again to even higher than the level of before treatment. After treating with hawthorn flavanone, the ratio of FAS/HARMEAN (HSL, TGH) in adipose was significantly descend and achieved the lowest level at 1 h (P<0.01), but it was descendsubsequently. In muscle tissue, hawthorn flavanone was able to significantly up-regulated the expression of FAS and HSL and lower dose group showed greater increasing, the change of SREBP-1c was similar in adipose tissue except the more heavily upgrade.


CONCLUSION
Hawthorn flavanone had the function of depressing the concentration of blood-fat, it co-adjusted lipid metabolism of animal by regulating the transcription expression of FAS, HSL, TGH and SREBP-1c especially HSL and SREBP-1c transcription level.