益生菌对肥胖大鼠血脂及胰岛素相关指标的影响
发布时间:2018-04-22 20:27
本文选题:肥胖 + 血脂紊乱 ; 参考:《大连医科大学》2013年硕士论文
【摘要】:目的:1.高脂饮食构建单纯性肥胖大鼠模型;2.观察空白对照组、高脂对照组、嗜酸乳杆菌干预组、短双歧杆菌干预组大鼠肥胖相关指标(体重、腹围、身长、Lee’s指数)及胰岛素相关指标(空腹血糖、空腹血清胰岛素、胰岛素敏感指数、胰岛素分泌指数、胰岛素抵抗指数)的变化,探讨肥胖、血脂、胰岛素相关指标的关系及益生菌(嗜酸性乳杆菌、短双歧杆菌)对肥胖大鼠血脂及胰岛素相关指标的干预作用。 方法:3周龄,体质量50±5gSD雄性大鼠50只,随机分为2组:空白对照组(N组)10只给予普通饲料喂养,高脂饮食组40只给予高脂饲料喂养。喂养4周,高脂饮食组中以超出空白对照组平均体重的20%作为试验用肥胖大鼠,高脂饮食组4只未达标准,予以剔除,剩余36只肥胖大鼠随即分为高脂对照组(A组)、嗜酸乳杆菌干预组(B组)、短双歧杆菌干预组(C组),每组12只。N组每天给予普通饲料+1ml/100g体重生理盐水灌胃;A组每天给予高脂饲料+1ml/100g体重生理盐水灌胃;B组每天给予高脂饲料+1ml/100g体重嗜酸乳杆菌菌液灌胃;C组每天给予高脂饲料+1ml/100g体重短双歧杆菌菌液灌胃,饲养4周。每周称量体重1次,根据体重变化调整灌胃量。实验结束后测定大鼠体质量、腹围、体长,并计算Lee’s肥胖指数,检测空腹血糖(FPG)、血清胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白(HDL)、低密度脂蛋白(LDL)、空腹血清胰岛素(Fins),并计算胰岛素敏感指数(IAI)、胰岛素分泌指数(IS)、胰岛素抵抗指数(IRI)。所得实验数据均采用SPSS17.0统计软件进行分析。 结果: 1.肥胖大鼠造模期间与空白对照组比较,给予高脂饮食组的大鼠体态明显增大,,活动量减少,饮水量、排尿量增多。给予益生菌灌胃干预4周后与高脂对照组比较,体态增长较慢,活动量略有增多,饮水量、排尿量减少。 2.肥胖相关指标的比较:空白对照组、高脂对照组、嗜酸性乳杆菌干预组、短双歧杆菌干预组体重(g)分别为:208.60±20.97、341.60±24.57、324.80±14.78、320.20±20.60;腹围(cm)分别为:13.84±0.80、17.14±0.56、14.96±0.79、15.00±1.13;身长(cm)分别为:23.96±0.33、24.16±0.44、24.14±0.56、23.86±0.37;Lee’s指数(103)分别为:2904.12±310.65、4715.24±360.19、4486.21±208.37、4474.68±301.61。各组大鼠体重、腹围、Lee’s指数比较,高脂对照组明显高于空白对照组(P0.05),差别有统计学意义,嗜酸性乳杆菌干预组、短双歧杆菌干预组明显低于高脂对照组(P0.05),差别有统计学意义,但嗜酸性乳杆菌干预组、短双歧杆菌干预组比较无明显差异(P0.05),差别无统计学意义;各组大鼠身长比较无明显差异(P0.05),差别无统计学意义。 3.血脂相关指标比较:空白对照组、高脂对照组、嗜酸性乳杆菌干预组、短双歧杆菌干预组TC(mg/dl)分别为:48.40±7.87、69.42±6.09、53.21±10.17、56.19±9.22;TG(mg/dl)分别为:8.23±2.11、29.19±5.37、18.81±6.32、15.32±5.19;HDL(mg/dl)分别为:17.40±2.97、11.64±2.03、14.47±2.22、14.40±2.17;LDL(mg/dl)分别为:12.67±1.68、17.23±2.69、14.41±2.13、13.29±1.78。各组大鼠TC、TG、LDL比较,高脂对照组明显高于空白对照组(P0.05),差别有统计学意义,嗜酸性乳杆菌干预组、短双歧杆菌干预组明显低于高脂对照组(P0.05),差别有统计学意义,嗜酸性乳杆菌干预组、短双歧杆菌干预组比较无明显差异(P0.05),差别无统计学意义;各组大鼠HDL比较,高脂对照组明显低于空白对照组(P0.05),差别有统计学意义,嗜酸性乳杆菌干预组、短双歧杆菌干预组明显高于高脂对照组(P0.05),差别有统计学意义,嗜酸性乳杆菌干预组、短双歧杆菌干预组比较无明显差异(P0.05),差别无统计学意义。 4.胰岛素相关指标比较:空白对照组、高脂对照组、嗜酸性乳杆菌干预组、短双歧杆菌干预组FPG(mmol/L)分别为:7.89±1.71、12.43±1.27、10.08±0.93、9.40±1.34;Fins(mIU/L)分别为:5.03±0.99、13.28±0.78、8.70±0.87、6.42±1.14;IAI分别为:-1.57±0.17、-2.21±0.03、-1.93±0.06、-1.77±0.12;IS分别为:0.66±0.12、1.08±0.17、0.87±0.12、0.69±0.11;IRI分别为:1.80±0.61、7.31±0.54、3.90±0.52、2.72±0.76。各组大鼠空腹血糖比较,高脂对照组明显高于空白对照组(P0.05),差别有统计学意义,嗜酸性乳杆菌干预组、短双歧杆菌干预组明显低于高脂对照组(P0.05),差别有统计学意义,但嗜酸性乳杆菌干预组、短双歧杆菌干预组比较无明显差异(P0.05),差别无统计学意义;血清胰岛素、胰岛素敏感指数、胰岛素分泌指数、胰岛素抵抗指数比较,高脂对照组明显高于空白对照组(P0.05),差别有统计学意义,嗜酸性乳杆菌干预组、短双歧杆菌干预组明显低于高脂对照组(P0.05),差别有统计学意义,嗜酸性乳杆菌干预组、短双歧杆菌干预组比较,短双歧杆菌干预组明显低于嗜酸性乳杆菌干预组(P0.05),差别有统计学意义。 结论: 1.给予高脂饮食喂养4周后成功构建肥胖大鼠模型。 2.肥胖大鼠发生了血脂紊乱、空腹血糖升高、高胰岛素血症及胰岛素抵抗。 3.嗜酸性乳杆菌与短双歧杆菌均具有降低肥胖大鼠血脂、空腹血糖,改善胰岛素抵抗相关指标作用,且不影响大鼠的正常生长发育。 4.在减轻体重、改善血脂异常方面嗜酸性乳杆菌与短双歧杆菌菌种疗效相当,在改善胰岛素抵抗相关指标方面,短双歧杆菌优于嗜酸性乳杆菌。
[Abstract]:Objective: 1. high fat diet construction of simple obesity rat model, 2. blank control group, high fat control group, Lactobacillus acidophilus intervention group, the short Bifidobacterium intervention group obesity related indexes (weight, abdominal circumference, body length, Lee 's index) and insulin related indexes (empty abdominal blood glucose, fasting serum insulin, insulin sensitivity index, insulin) The changes in the secretory index, insulin resistance index, and the relationship between obesity, blood lipid, insulin related indexes and the intervention of probiotics (Lactobacillus acidophilus, bifidobacteria) on lipid and insulin related indexes in obese rats.
Methods: 3 weeks of age, 50 male rats with body mass of 50 5gSD were randomly divided into 2 groups: 10 rats in the blank control group (group N) were fed with ordinary feed, and 40 of the high fat diet group were fed with high fat feed. For 4 weeks, the high fat diet group was used as experimental obese rats beyond the average weight of the blank control group, and the high fat diet group 4 had not reached the standard, and the high fat diet group 4 only did not reach the standard, The remaining 36 obese rats were then divided into high fat control group (A group), Lactobacillus acidophilus intervention group (group B), short Bifidobacterium intervention group (group C), 12.N groups in each group were given normal diet +1ml/100g body weight physiological saline every day; A group was given high fat feed +1ml/100g body weight physiological saline every day; B group was given high fat diet every day. The +1ml/100g body was fed with Lactobacillus acidophilus liquid, and group C was given high fat diet +1ml/100g weight short Bifidobacterium liquid every day for 4 weeks. The weight was 1 times a week and the weight changes were adjusted. After the experiment, the body mass, abdominal circumference and body length were measured, and the Lee 's obesity index was calculated and the serum glucose (FPG) was detected and serum was detected. Serum serum glucose (FPG) was measured and serum was measured. Serum serum glucose (FPG) and serum were detected. Cholesterol (TC), triglyceride (TG), high density lipoprotein (HDL), low density lipoprotein (LDL), fasting serum insulin (Fins), insulin sensitivity index (IAI), insulin secretion index (IS) and insulin resistance index (IRI). The experimental data were analyzed by SPSS17.0 statistical software.
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