Effect of dietary fiber and butyric acid on lysosomal enzyme activities in streptozotocin-induced diabetic rats

The effect of dietary fiber and butyric acid on lysosomal enzyme activities in different tissues of streptozotocin-induced diabetic rats was studied by analyzing the specific activities of N-acetyl-β-d-glucosaminidase, β-d-glucuronidase, β-d-galactosidase, and acid phosphatase in various tissues. An alteration in the activities of these lysosomal enzymes in different tissues was observed in streptozotocin-induced diabetic rats. Dietary fiber and butyric acid supplementation at 500 mg/kg body weight/day was found effective in modulating the altered glycosidases activity in liver, spleen, heart, lungs, testis, and brain during diabetes. Our results also indicated that butyric acid along with dietary fiber is involved in minimizing the oxidative stress-induced tissue damage thereby regulating the altered enzyme activities in different tissues during diabetes.     

Bitter gourd (Momordica charantia) modulates activities of intestinal and renal disaccharidases in streptozotocin-induced diabetic rats

During diabetes, structural and functional changes in the alimentary tract are known to take place resulting in increased absorption of intestinal glucose and alterations in the activities of brush border disaccharidases. Similar observations are also reported in the renal cortex. In the present investigation, we examined the effect of feeding bitter gourd fruit devoid of seeds on activities of intestinal and renal disaccharidases, viz., maltase, sucrase, and lactase in streptozotocin-induced diabetic rats. Normal and diabetic rats were fed either with basal diet or a diet containing 10% bitter gourd powder. Specific activities of intestinal disaccharidases were significantly increased during diabetes, and supplementing bitter gourd in the diet clearly indicated amelioration in the activities of maltase and lactase during diabetes. However, a significant change was not observed with sucrase activity by feeding of bitter gourd. During diabetes, renal disaccharidase activities were significantly lower than those in the control rats. Bitter gourd supplementation was beneficial in alleviating the reduction in maltase activity during diabetes. However, not much change in the activities of sucrase and lactase was observed upon feeding. This positive influence of feeding bitter gourd on intestinal and renal disaccharidases clearly indicates their beneficial role in the management of diabetes, thus making diabetic animals more tolerant to hyperglycemia.     

不溶性大豆膳食纤维对大鼠采食行为及血液指标的影响

以Wistar大鼠为实验动物,喂食普通饲料,同时灌胃不溶性大豆膳食纤维,观察大豆膳食纤维对大鼠体重、血液中维生素A和钙离子的影响。结果发现,大鼠摄入大豆膳食纤维后,采食行为受到抑制,饱腹感增加,且大鼠体重增长受到抑制,达到控制体重的效果,然而大鼠血液中的维生素A和钙离子含量有所降低,其中大鼠每日摄入500 mg/kg膳食纤维,至第55天时,大鼠体重仅占空白组体重的78.38%,同时,血液中的维生素A降低了35.80%,钙离子降低了51.21%。     

癞葡萄水提物的降糖效果研究

为研究癞葡萄水提物对正常小鼠及四氧嘧啶型糖尿病小鼠血糖浓度的影响,将不同剂量(250mg/kg体重、500mg/kg体重和750mg/kg体重)的水提物灌胃给予禁食12h的正常小鼠和四氧嘧啶型糖尿病小鼠。试验结果表明,癞葡萄水提物对正常小鼠的血糖浓度没有影响,而对四氧嘧啶型糖尿病小鼠的血糖浓度有显著影响。其中500mg/kg剂量组糖尿病小鼠的血糖值在灌胃4h后较相应的初始血糖值下降45.28%,糖尿量提高38.39%;给予500mg/kg水提物治疗15d后,糖尿病小鼠血糖值较治疗前下降59.88%,同时对小鼠体重的恢复有一定的促进作用。结果表明癞葡萄水提物对四氧嘧啶型糖尿病小鼠具有良好的预防和治疗效果。     

乳铁蛋白对幼年大鼠骨健康影响

目的:研究乳铁蛋白(Lactoferrin,LF)对幼年大鼠骨健康的作用。方法:将40 只4 周龄雄性SD大鼠随机分为对照组(0 mg/kg bw/d)、LF低剂量组(100 mg/kg bw/d)、LF中剂量组(500 mg/kg bw/d)和LF高剂量组(1000 mg/kg bw/d),连续喂养30 d后,测定幼年大鼠体重和脏体比变化、股骨骨密度(Bone mineral density,BMD)和骨微观结构变化、血清及股骨骨髓组织中抗酒石酸酸性磷酸酶(Tartrate resistant acid phosphatase,TRACP)、基质金属蛋白酶9(Matrix metalloproteinase 9,MMP-9)、组织蛋白酶K(Cathepsin,CTSK)、核因子κB受体激活因子配体(Receptor activator for nuclear factor-κB ligand,RANKL)和骨保护素(Osteocalcin,OPG)水平。结果:灌胃LF 30 d后,与对照组比较,LF剂量组幼年大鼠体重、脏体比增长趋势相近,差异不显著(P>0.05),LF中、高剂量组骨小梁数量(Trabecular bone number,Tb.N)、骨小梁厚度(Trabecular bone thickness,Tb.Th)、血清及股骨骨髓组织中OPG和OPG/RANKL水平显著增加(P<0.05),骨小梁分离度(Trabecular bone space,Tb.Sp)、TRACP、MMP-9、CTSK和RANKL显著降低(P<0.05)。结论:补充LF能够减少幼年大鼠骨吸收,增加骨形成和骨量,调节骨代谢平衡,促进骨健康。     

金柚幼果膳食纤维改善糖尿病小鼠的肠道健康

为了研究金柚幼果膳食纤维对小鼠肠道健康的影响。将小鼠随机分为6组,按照0.2mL/10g体重的剂量进行灌胃。灌胃4周后,HE染色观察结肠组织损伤情况,收集小鼠粪便及结肠,测定水分、pH值和短链脂肪酸(SCFAs)含量。通过试剂盒提取各组小鼠粪便细菌总DNA,利用高通量测序技术对16S rRNA基因的V4区域进行测序,最后通过生物信息学方法对测序数据进行分析,并结合前期研究进行血糖相关指标与肠道菌群的相关性分析。结果显示:金柚幼果膳食纤维实验组可提高糖尿病小鼠在结肠及粪便中的水分含量,SCAFs含量,降低pH值水平,其中水分含量以TDF组上升最为显著,分别提高了8.04%和21.36%;SCAFs含量在结肠、粪便中均在TDF组有显著变化,分别升高475.19%(乙酸)和702.56%(正丁酸)。同时HE染色实验表明金柚幼果膳食纤维在一定程度上可以减缓因糖尿病导致的肠道黏膜损伤;其能够促进有益菌群繁殖,同时抑制有害微生物增殖;该膳食纤维调节小鼠的血糖水平可能与其进入肠道后被益生菌发酵,产生短链脂肪酸有关。结果表明金柚幼果膳食纤维可以维持肠粘膜屏障的完整性,调节肠道菌群的结构,对小鼠的肠道健康具有改善调节的作用。     

Chinese bayberry fruit extract alleviates oxidative stress and prevents 1,2-dimethylhydrazine-induced aberrant crypt foci development in rat colon carcinogenesis

The effects of Chinese bayberry fruit extract (CBFE) ingestion on hepatic and colonic oxidative stress and 1,2-dimethylhydrazine (DMH)-induced intestinal aberrant crypt foci (ACF) development in rats were investigated. Rats were administered DMH (35 mg/kg body weight) and were supplemented with CBFE (50 or 500 mg/kg body weight every day) for 16 weeks. Results showed that DMH consumption induced intestinal ACF development and adenoma or adenocarcinoma formation, which were significantly reduced with CBFE supplement. The CBFE treatments increased reduced glutathione levels and activities of superoxide dismutase, catalase and glutathione reductase, in both hepatic and colonic tissues; however, the activities of glutathione-S-transferase and glutathione peroxidase were inhibited. These results indicate that CBFE, rich in phenolic compounds, effectively inhibits DMH-induced ACF and colonic tumour development by alleviating oxidative stress.     

辣椒素对糖尿病大鼠肠道健康的影响

目的：研究辣椒素对链脲佐菌素（streptozotocin,STZ）诱导的糖尿病大鼠肠道环境的影响。方法：将40 只Sprague-Dawley（SD）雄性大鼠按体质量随机分为5 组,每组8 只。其中一组为正常对照组（CON组）,其余4 组采用STZ诱导大鼠建立糖尿病模型,分别为模型空白组,辣椒素低（3.0 mg/（kg•d））、中（6.0 mg/（kg•d））、高（9.0 mg/（kg•d））剂量组。实验期间给大鼠喂食基础饲料,自由采食和饮水。饲养28 d后将大鼠处死解剖,测定各组大鼠体质量、盲肠壁表面积、盲肠内容物的水分含量、pH值、游离氨含量以及微生物数量、短链脂肪酸（short-chain fatty acid,SCFA）含量和肠道组织形态等指标。结果：辣椒素使糖尿病大鼠的总游离氨含量、pH值、水分含量均升高,SCFA含量降低,盲肠内容物中有益菌数量降低,有害菌数量显著增加（P＜0.05）。结论：灌胃低、中、高剂量的辣椒素对糖尿病大鼠肠道环境均有一定的损害作用。     

杂豆膳食纤维对糖尿病大鼠的降血糖作用

目的：探讨不同剂量杂豆（芸豆、黑豆、绿豆（1∶1∶1,m/m））膳食纤维对糖尿病大鼠的降血糖效果。 方法：糖尿病大鼠模型通过腹腔注射链脲佐菌素溶液（150 mg/kg）构建,建模成功后,连续灌胃给予杂豆膳食 纤维42 d,测定各组大鼠体质量、空腹血糖值、胰腺/体质量和血清中肝糖原、胰岛素及糖化血清蛋白含量,并取 胰脏组织制作苏木精-伊红染色病理学切片进行观察。结果：与模型组大鼠相比,除低剂量杂豆膳食纤维组外, 其余各灌胃剂量组大鼠体质量均极显著升高（P＜0.01）;低剂量杂豆膳食纤维组较模型组空腹血糖值显著下 降（P＜0.05）,中、高剂量杂豆膳食纤维组及格列本脲组大鼠空腹血糖值均较模型组极显著下降（P＜0.01）;各 灌胃剂量组大鼠胰腺/体质量均较模型组大鼠不同程度升高,格列本脲组及中、高剂量杂豆膳食纤维组大鼠胰腺/体 质量较模型组大鼠显著升高（P＜0.05）;各灌胃剂量组大鼠肝糖原及胰岛素含量均较模型组大鼠不同程度上升, 糖化血清蛋白含量均不同程度下降,且通过胰腺组织病理学切片观察得知,各灌胃剂量组大鼠胰腺组织损伤程度明 显减轻,胰岛细胞数目增多,且细胞水肿变形程度减轻。结论：杂豆膳食纤维可降低糖尿病模型大鼠的血糖含量且 可改善糖尿病对大鼠胰腺的损伤情况。     

纳米甘薯渣纤维素对高脂膳食大鼠肠道内环境及形态的影响

目的：探讨纳米甘薯渣纤维素对高脂膳食大鼠肠道内环境及形态的影响。方法：选用40 只Sprague-Dawley（SD）成年雄性大鼠随机分为5 组,其中1 组大鼠喂食基础饲料（正常组）,另外4 组大鼠喂食高脂饲料和添加不同粒度甘薯渣纤维素的高脂饲料,分为对照组、普通甘薯渣纤维素组（OC组）、微晶甘薯渣纤维素组（MCC组）和纳米甘薯渣纤维素组（CNC组）,实验期28 d后解剖,测定大鼠采食量、体质量、盲肠组织和盲肠内容物相关指标、粪便干质量、小肠液干质量和总胆汁酸含量、小肠形态等。结果：纳米甘薯渣纤维素可以显著降低高脂膳食大鼠体质量和盲肠游离氨含量,显著升高盲肠组织各项指标、盲肠内容物短链脂肪酸含量、pH值以及小肠液总胆汁酸含量（P＜0.05）,同时具有增加小肠绒毛长度及肌层厚度的作用。结论：随着甘薯渣纤维素粒度的减小,其对肠道内环境及形态作用愈加明显,说明纳米甘薯渣纤维素能有效降低SD雄性大鼠体质量,提高其肠道健康。     

菌质水溶性膳食纤维对小鼠肠蠕动与吸收的影响

研究菌质水溶性膳食纤维对小鼠肠蠕动与吸收的影响,为其在食品工业和医药保健领域应用提供理论依据。选取75只昆明种小鼠,随机分成5组:空白对照组、阳性对照组和3个受试组,分别灌胃生理盐水、50 mg/kg·BW的酚酞溶液、2.5g/kg·BW的水溶性膳食纤维、5g/kg·BW的水溶性膳食纤维、15g/kg·BW的水溶性膳食纤维。试验时间共13d,每天记录小鼠体重,小鼠小肠吸收试验和蠕动试验分别测定计算血清中木糖浓度、碳末推进率。结果表明:1菌质水溶性膳食纤维具有一定的抑制小鼠体重的作用(P0.05),且抑制小鼠体重与菌质水溶性膳食纤维剂量呈正相关(P0.05);2中剂量的菌质水溶性膳食纤维组小鼠小肠吸收功能的影响达显著水平(P0.05);3菌质水溶性膳食纤维能促进小鼠小肠蠕动(高、中剂量达到极显著水平,P0.01;低剂量达到显著水平,P0.05),且小鼠小肠蠕动与菌质剂量呈正相关性(高剂量与低剂量的菌质水溶性膳食纤维组之间差异显著,P0.05)。因此,一定量的菌质水溶性膳食纤维能抑制小鼠体重,具有促进小鼠小肠蠕动与吸收的作用。     

Ninety-day dietary toxicity study of mulberry leaf extract in rats

Mulberry leaf extract was studied toxicologically in male and female SD rats. The extract was administered orally at concentrations of 0% (control group), 0.1%, 0.4% and 1% in basal diet for 90 days. No remarkable change in test animals of both sexes was observed in terms of body weight gain or at necropsy. Hematology and blood chemistry revealed no abnormalities. Pathological examination revealed no toxic change in any organ observed. These findings indicate that dietary intake of 1% mulberry leaf extract for 90 days (884.5 mg/kg/day for males and 995.7 mg/kg/day for females as mean daily intake) causes no toxicological change in rats.     

赶黄草水提物对高脂饮食联合STZ诱导的Ⅱ型糖尿病大鼠的降血糖作用

研究了赶黄草水提取物对高脂饮食联合链脲佐菌素(STZ)诱导的Ⅱ型糖尿病大鼠的降血糖作用。随机选取10只SD大鼠作为正常对照组(NC),其余大鼠经4 w高脂饮食喂养后,腹腔注射小剂量STZ(35 mg/kg)建立Ⅱ型糖尿病大鼠模型。造模成功后随机分为:模型组(MC)、二甲双胍阳性对照组(PC,500 mg/kg/d)、赶黄草水提物组(PCP,545 mg/kg/d),每组10只。干预4 w后,检测各组大鼠血糖、血脂、抗氧化水平,肝、胰HE染色观察组织病变。结果表明,与模型组相比,赶黄草水提物组空腹血糖(FBG)、糖化血红蛋白(Hb A1c)水平分别降低43.93%、77.05%(p<0.05),血清高密度脂蛋白胆固醇(HDL-C)、谷胱甘肽过氧化物酶(GSH-Px)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)分别升高80.00%、76.32%、42.75%、32.12%(p<0.05),丙二醛(MDA)含量降低26.89%(p<0.01)。赶黄草水提物能显著降低Ⅱ型糖尿病大鼠血糖水平,改善胰岛素抵抗,其机制可能与其发挥抗氧化作用,减少氧化应激有关。     

纳米甘薯渣纤维素对糖尿病大鼠血糖及血脂水平的影响

目的：探讨纳米甘薯渣纤维素对糖尿病大鼠血糖及血脂的影响。方法：选用40 只雄性Sprague-Dawley（SD）大鼠随机分组为5 组,其中1 组大鼠喂食基础饲料作为空白组,另外4 组采用链脲佐菌素（streptozotocin,STZ）诱导大鼠建立糖尿病模型,分为模型对照组（MC组）、普通甘薯渣纤维素组（OC组）、微晶甘薯渣纤维素组（MCC组）和纳米甘薯渣纤维素组（CNC组）,实验期28 d,测定大鼠体质量、采食量、空腹血糖、糖化血清蛋白、血清胰岛素、肝糖原及血脂水平等指标。结果：模型对照组大鼠的采食量,空腹血糖、糖化血清蛋白、血脂水平均显著高于空白组（P＜0.05）,体质量、胰岛素和肝糖原含量明显下降（P＜0.05）,说明造模成功,糖尿病大鼠表现出相应的症状。喂食不同粒度甘薯渣纤维素的糖尿病大鼠,其体质量、血清胰岛素和肝糖原水平有所增加,而空腹血糖、糖化血清蛋白、血脂水平等都有所下降,其中喂食纳米甘薯纤维素的糖尿病大鼠指标变化具有显著性差异（P＜0.05）。结论：从甘薯渣纤维素粒度分析,可以看出随着甘薯渣纤维素粒度的减小,其对糖尿病大鼠血糖血脂的调节作用愈加明显,其中纳米甘薯渣纤维素具有较好的调节血糖血脂水平的作用。     

Antihyperglycemic activity of polyphenolic components of black/bitter cumin <Emphasis Type="Italic">Centratherum anthelminticum</Emphasis> (L.) Kuntze seeds

The effect of black/bitter cumin seeds Centratherum anthelminticum (L.) Kuntze extract (CA) containing mixture of polyphenolic compounds was tested on rat intestinal α-glucosidases, human salivary α-amylase activity and postprandial hyperglycemia in rats. Polyphenolic components of C. anthelminticum seeds (CA) dose dependently inhibited rat intestinal disaccharidases. IC₅₀ values were found to be 34.1 ± 3.8, 62.2 ± 4.5 and 500.5 ± 11.9 μg of CA for rat intestinal sucrase, maltase and p-nitrophenyl α-d-glucopyranoside (PNP-glycoside), respectively. CA also inhibited human salivary α-amylase activity with IC₅₀ value of 185.5 ± 4.9 μg. The inhibitory effect of CA was found to be 8–32 fold more potent than dl-catechin but less effective than acarbose on rat intestinal disaccharidases and salivary α-amylase. The enzyme kinetic studies showed a non-competitive type of inhibition with a low K _i value of 30.24 μg, 76.67 μg and 341.60 μg of CA for maltase, sucrase and PNP-glycoside hydrolysis activities, respectively. The in vitro inhibition of glucosidases was further confirmed by in vivo maltose tolerance test in rats. Feeding of CA at 50–200 mg/kg body weight (b.wt) to maltose (2.0 g/kg b.wt), loaded rats significantly reduced the postprandial plasma glucose levels compared with acarbose. The inhibitory components of CA were identified as a mixture of polyphenolic compounds viz., gallic acid, protocatechuic acid, caffeic acid, ellagic acid, ferulic acid, quercetin and kaempferol. This study demonstrated that CA exerts antihyperglycemic effect by decreasing postprandial glucose in rats by modulating α- amylase and glucosidases (sucrase and maltase) activity and thus may be useful for the management of diabetes mellitus.     

孔石莼多糖对糖尿病小鼠抗氧化能力的影响

目的:研究孔石莼多糖抗氧化活性.方法:采用传统的水提醇沉法提取孔石莼多糖,以四氧嘧啶诱导的糖尿病小鼠为模型,分为孔石莼多糖低、高剂量组、阳性对照组、模型组及正常组.分别以不同剂量孔石莼多糖(250mg/kg、1000rng/kg)、二甲双胍(1000mg/kg)和蒸馏水灌胃,28d后测定小鼠肝脏和肾脏组织中SOD、GSH-Px、CAT活性和MDA含量.结果:高剂量孔石莼多糖能显著提高糖尿病小鼠肝脏和肾脏组织中SOD、GSH-Px和CAT的活性,降低MDA含量.结论:孔石莼多糖具有显著的抗氧化作用.     

羊肚菌多糖PMEP-1对大鼠肠道内短链脂肪酸的影响

研究羊肚菌多糖PMEP-1 对大鼠肠道内短链脂肪酸的影响。以SD 大鼠为实验模型,进行分组喂养,分别灌胃高剂量(400mg/(kg bw·d))、中等剂量(200mg/(kg bw·d))、低剂量(mg/(kg bw·d))的羊肚菌多糖PMEP-1,为期4 周,定期收集大鼠粪便样。粪便处理后通过气相色谱法测定大鼠肠道内的短链脂肪酸含量。结果表明：羊肚菌多糖PMEP-1 对于大鼠肠道内乙酸、丙酸、异丁酸、丁酸、戊酸、己酸的产生有较大影响,而对于庚酸和异戊酸没有明显作用;不同的灌胃剂量对大鼠肠道短链脂肪酸的影响有较大差异,以中等剂量和低剂量多糖对短链脂肪酸的产生影响明显,各剂量组大鼠肠道内短链脂肪酸的含量在第7～14 天时最多。     

鹰嘴豆膳食纤维对高脂血症大鼠脂代谢的改善作用

本研究观察了鹰嘴豆膳食纤维对高脂血症大鼠血脂及抗氧化水平的影响,为鹰嘴豆保健功效研究提供参考依据。40只雄性SD大鼠高脂饲料喂养建立高脂血症模型,将造模成功的大鼠,随机分为高脂模型组,鹰嘴豆膳食纤维高(30 g/kg高脂饲料)、中(15 g/kg高脂饲料)、低(5 g/kg高脂饲料)3个干预组。高脂模型组继续喂以高脂饲料,干预组分别喂以含不同含量鹰嘴豆膳食纤维的高脂饲料。干预7周后,处理动物,分别测定各组大鼠体重、肝重、附睾周脂重,血清血脂水平及氧化应激水平。结果表明:与高脂模型组相比,鹰嘴豆膳食纤维组体重增量、肝重、附睾周脂重均有下降,其中体重增量以干预第5周高剂量组下降最为明显,降低:29.34%,高中低各剂量组附睾周脂重分别降低:33.81%,17.28%,21.86%,但肝重降低无统计学差异;血脂方面,甘油三酯(TG)、低密度脂蛋白(LDL-C)值高剂量组降低:51.52%,40.45%,总胆固醇(TC)值以中剂量组最优,降低:34.31%,高密度脂蛋白(HDL-C)高剂量组升高42%;在抗氧化能力方面,中剂量组丙二醛(MDA)含量降低40%,高剂量组总超氧化物歧化酶(T-SOD)、谷胱甘肽过氧化物酶(GSH-Px)水平分别升高54%,55%,且T-SOD、GSH-Px升高呈现剂量相关性。可见鹰嘴豆膳食纤维具有降低高脂血症大鼠体质量,调节异常血脂作用,而这种作用可能与其提高高脂血症大鼠抗氧化能力,降低氧化应激损伤有关。     

复合膳食纤维改善小鼠便秘及其作用机制研究

目的? 研究复合膳食纤维对便秘小鼠的通便作用,探讨其对小鼠肠道菌群及短链脂肪酸的影响。方法? 选取BALB/c小鼠,除空白对照组外,其余小鼠通过灌胃盐酸洛哌丁胺建立便秘小鼠模型。造模成功后的小鼠随机分为模型组、聚乙二醇4000散组、复合膳食纤维低、中、高剂量组,分别给予维持饲料、聚乙二醇4000散加维持饲料、含2.5%、5%、7.5%复合膳食纤维的纯化饲料进行干预。干预14天后,通过排便实验、小肠推进实验,验证复合膳食纤维的润肠通便效果,并采集粪便检测短链脂肪酸的含量以及通过16s rDNA高通量测序分析肠道菌群组成。结果? 复合膳食纤维能降低便秘小鼠的首粒排黑便时间,增加5 h内排便数量及重量,提高粪便含水量和小肠推进率,可在一定程度上促进乙酸、丙酸、丁酸、戊酸、异丁酸、异戊酸的分泌;在门水平上,显著上调Verrucomicrobiota的相对丰度、下调Bacteroidetes相对丰度,Firmicutes的相对丰度无明显变化;在属水平上,上调有益菌Akkermansia、Faecalibaculum和Bifidobaculum的相对丰度。结论? 复合膳食纤维可以有效改善小鼠便秘,其机制可能是通过调节肠道菌群组成以及促进短链脂肪酸分泌实现的。     

共轭亚油酸对高脂饲料诱导肥胖大鼠脂质蓄积和肠道菌群的影响

目的:以高脂饲料诱导建立肥胖大鼠模型,探讨共轭亚油酸（CLA）干预对肥胖大鼠脂质蓄积和肠道菌群的影响。方法:将40只SPF级雄性SD大鼠按体重随机分为四组,每组10只,除对照组（ND组）以普通饲料喂养外,其余组均以高脂饲料喂养。其中ND组灌胃花生油1 g/kg;高脂模型组（HD组）灌胃花生油1 g/kg;高脂共轭亚油酸低剂量组（LC组）灌胃0.2%共轭亚油酸1 g/kg;高脂共轭亚油酸高剂量组（HC组）灌胃2%共轭亚油酸1 g/kg,干预9周。于实验末采集大鼠粪便后提取粪便中细菌DNA后进行16S rDNA测序,之后麻醉采血后处死,取肝脏、肾周脂肪和睾周脂肪组织,于?80 ℃保存。结果:HD组大鼠体重、内脏脂肪、血清和肝脏甘油三酯和总胆固醇显著高于ND组（P<0.05）,高剂量共轭亚油酸干预可显著降低大鼠体重、血清甘油三酯和总胆固醇及肝脏总胆固醇（P<0.05）;高脂饲料诱导可使大鼠肠道菌群属水平中Eubacterium_coprostanoligenes_group（真杆菌属）、Psychrobacter（嗜冷杆菌属）、Corynebacterium_1（棒状杆菌_1）、Staphylococcus（葡萄球菌属）的相对丰度增加;高剂量CLA干预可改变肥胖大鼠的肠道菌群的组成,如在属水平上显著增加了Bifidobacterium（双歧杆菌属）、Butyrivibrio（丁酸弧菌属）、Ruminococcaceae_UCG-014（瘤胃球菌科_UCG-014）等的相对丰度（P<0.05）,减少了Staphylococcus（葡萄球菌属）、Corynebacterium_1（棒状杆菌_1）等的相对丰度（P<0.05）。结论:共轭亚油酸可降低高脂饲料诱导肥胖大鼠的体重和脂质蓄积,其作用可能与调节大鼠肠道菌群组成有关。