摘要
目的探讨原花青素对高脂饮食诱导的大鼠脂肪肝的预防及治疗作用。方法雄性Wistar大鼠60只,随机分为空白对照组、模型组、花青素低剂量治疗组(低剂量组)和花青素高剂量治疗组(高剂量组)各15只。空白对照组大鼠喂食普通饲料,模型组和低、高剂量组给予高脂饲料,低、高剂量组分别给予50、200mg/(kg·d)花青素灌胃,对照组和模型组给予质量分数0.9%氯化钠溶液灌胃。喂养8周后,禁食12h处死大鼠,收集血清和肝脏组织。观察各组肝组织病理学改变,检测血清谷丙转氨酶、谷草转氨酶、总胆固醇、三酰甘油、高密度脂蛋白胆固醇、低密度脂蛋白胆固醇水平及血清超氧化物歧化酶、谷胱甘肽过氧化物酶活性和丙二醛含量。结果对照组大鼠肝组织结构正常,模型组大鼠肝组织出现大面积小叶内肝细胞脂肪变性、气球样变性和炎性细胞浸润,低剂量组和高剂量组肝脏脂肪变性明显减轻、无明显气球样变、无炎性细胞浸润;模型组血清总胆固醇[(3.98±0.29)mmol/L]、三酰甘油[(0.85±0.14)mmol/L]、低密度脂蛋白胆固醇[(1.41±0.19)mmol/L]、谷丙转氨酶[(13.84±1.92)u/L]、谷草转氨酶[(22.93±2.35)u/L]、丙二醛[(3.63±0.23)μmol/L]水平高于对照组[(1.45±0.21)mmol/L、(0.57±0.07)mmol/L、(0.98±0.20)mmol/L、(8.91±2.13)u/L、(16.90±0.87)u/L、(1.51±0.32)μmol/L]和高剂量组[(1.57±0.28)mmol/L、(0.60±0.08)mmol/L、(1.02±0.11)mmol/L、(9.57±1.81)u/L、(17.86±1.75)u/L、(2.34±0.15)μmol/L](P<0.05),低剂量组血清谷丙转氨酶[(10.50±1.23)u/L]低于模型组(P<0.05);模型组超氧化物歧化酶[(199.62±18.25)u/mL]、谷胱甘肽过氧化物酶[(326.75±27.90)u/mL]活性低于对照组[(313.87±12.98)、(448.23±35.89)u/mL]、高剂量组[(283.54±10.92)、(442.44±32.87)u/mL]和低剂量组[(269.53±20.38)、(397.25±27.56)u/mL](P<0.05),高、低剂量组与对照组两两比较差异无统计学意义(P>0.05)。结论原花青素可能通过抗氧化机制实现对高脂饮食大鼠脂肪肝的保护作用。
Objective To investigate the effect of proanthocyanidins on preventing and treating high-fat diet induced fatty liver in rats. Methods Sixty male Wistar rats were randomly divided into control group, liver injury model group, low-dose proanthocyanidins group and high-dose proanthocyanidins group. The rats in control group were fed with standard diet, while the rats in the other three groups were fed with high-fat diet. In addition, the rats in low- and high-dose proanthoeyanidins groups received gavage with 50 and 200 mg/(kg · d) proanthocyanidins, while the rats in control and model groups were given gavage with 0. 9% sodium chloride solution. Eight weeks later, all rats were sacrificed after 12-hour fasting to collect serum and liver tissues. The histological changes in the livers were observed and the levels of glutamate pyruvate transaminase (GPT), glutamic-oxal(o)acetic transaminase (GOT), total cholesterol (TC), triaeylglycerol (TG), high density lipoprotein-cholesterol (HDL-C), low density lipoprotein-eholesterol (LDL-C), superoxide dismutase (SOD), glutathione perioxidase (GSH-Px) and malondialdehyde (MDA) were detected and compared among groups. Results The liver of control group showed normal tissue structure, and model group showed a large area of fatty degeneration, ballooning degeneration and inflammatory cellular infiltration of liver cells. The histological changes in low- and high-dose groups were attenuated, no ballooning degeneration or inflammatory cellular infiltration. The levels of TC ((3. 98 ±0. 29) mmol/L), TG ((0. 85±0. 14) mmol/L), LDL-C ((1. 41±0. 19) mmol/L), GPT ((13. 84 ± 1. 92) u/L), GOT ((22. 93 ± 2. 35) u/L) and MDA ((3. 63± 0. 23) μmol/L) were significantly higher in model group than those in control group ((1. 45 ± 0. 21) mmol/L, (0. 57 ± 0. 07) mmol/L, (0.98±0.20) mmol/L, (8. 91±2. 13) u/L, (16. 90±0. 87) u/L, (1. 51±0. 32) μmol/L) and high-dose group ((1. 57±0.28) mmol/L, (0.604-0.08) mmol/L, (1. 02±0.11) mmol/L, (9. 57±1.81) u/L, (17. 86±1.75) u/L, (2.34±0. 15) μmol/L) (P〈0.05). The levels of SOD ((199. 62± 18. 25) u/mL) and GSH-Px (326. 75±27.90) u/mL) in model group were significantly lower than those in control group ((313. 87 ± 12. 98), (448. 23 ± 35.89) u/mL), high-dose group ((283. 54±10.92), (442. 44±32.87) u/mL) and low-dose group ((269. 53±20.38), (397.25±27.56) u/mL) (P〈0.05). Conclusion Proanthocyanidins shows a protective effect on the high-fat dietinduced fatty liver in rats.
出处
《中华实用诊断与治疗杂志》
2016年第9期848-850,共3页
Journal of Chinese Practical Diagnosis and Therapy
基金
国家自然科学基金(81170408)
中国肝炎防治基金会王宝恩肝纤维化研究基金(CFHPC21020124)
关键词
原花青素
抗氧化
肝脏
高脂饮食
大鼠
Proanthocyanidins
antioxidation
liver
high-fat diet
rats