纳米材料作为一种新兴材料,在疾病诊断与治疗中拥有极大的应用潜力。为平衡纳米材料的生物活性和生物毒性之间的关系,清楚了解纳米材料在体内的清除机制和清除速率至关重要。其中,肾脏,作为人体重要的清除器官,直接影响纳米材料从血液清除到尿液的速率,进而影响其在生物体内的血液循环、肿瘤靶向效率和体内滞留等系列问题,最终影响其临床应用。基于近年来已报道的关于纳米材料与肾脏相互作用的诸多研究,本文系统介绍了肾脏结构、纳米材料在肾脏中的传输机制、理化性质对其肾脏清除效率的影响以及纳米材料在肾脏疾病诊疗中的应用。本文有望为精准纳米医学的发展以及纳米材料未来的临床转化起到促进作用。

Nanomaterials, as emerging materials, show great promise for the detection, diagnosis and treatment of diseases. Fully understanding their elimination pathway and clearance efficiency is important to better balance the bioactivity and biotoxicity of nanomaterials. Kidneys, as a major organ, play a key role in the clearance of nanomaterials from blood to urine. The clearance rate of nanomaterials in the kidneys directly affects their blood circulation, retention in the body and tumor targeting efficiency as well as final clinical applications. Based on current understanding of nano-bio interactions of nanomaterials in the kidneys, in this review, we introduced the kidney structure and elimination mechanism of nanomaterials in the kidneys. Then, how the physicochemical properties of nanomaterials affect their renal clearance efficiency are summarized. Finally, their applications in the kidney disease detection and treatment are presented. The basic understanding of nano-bio interactions of nanomaterials in the kidneys would promote the development of precise nanomedicine and their future clinical translation.

目的 丹酚酸B是传统中药丹参的重要生物活性组分,临床应用广泛。新近发现,丹酚酸B具有防治骨质疏松的作用。本研究拟在前期工作基础上,系统地研究丹酚酸B对去卵巢骨质疏松小鼠的作用,探讨其对小鼠间充质干细胞（MSCs）成骨分化的影响。方法 将18只8周龄SPF级别的C57雌性小鼠分为假手术组、骨质疏松组、丹酚酸B治疗组。骨质疏松组和丹酚酸B治疗组行双侧卵巢摘除术。而假手术组则保持正常的卵巢结构,同时去除局部的脂肪。3组均于术后3日内给予抗生素进行抗感染治疗。4周内,丹酚酸B治疗组给予丹酚酸B 2.5 mg/kg腹腔注射,连续12周,2天1次,其余2组在相同的时间内给予等量生理盐水。16周后,在麻醉状态下将所有小鼠处死。应用MicroCT测量了小鼠右后股骨的骨密度。采用qRT-PCR技术,分析小鼠左后股骨骨髓MSCs中Runx2和Osterix的表达。将小鼠右后股骨进行液氮研磨处理,提取蛋白质,用WB法测定OPG和RANKL的含量。结果 骨质疏松组小鼠股骨骨密度比假手术组低（P<0.05）,丹酚酸B治疗组小鼠股骨骨密度比骨质疏松组高,但差异无显著性意义（P<0.05）。骨质疏松组小鼠Runx2和Osterix水平低于假手术组（P<0.05）,丹酚酸B治疗组小鼠Runx2和Osterix水平比骨质疏松组高（P<0.05）。骨质疏松组小鼠OPG和RANKL蛋白水平低于假手术组（P<0.05）,丹酚酸B组小鼠OPG和RANKL蛋白水平比骨质疏松组高（P<0.05）。结论 绝经后骨质疏松症早期对小鼠的骨质疏松具有一定的影响,但还需要更多的实验来验证本研究的结论。

Objective Salvianolic acid B is an important bioactive component of traditional Chinese medicine Salvia miltiorrhiza and is widely used in clinic．Recently,salvianolic acid B has been found to have the effect of preventing osteoporosis．On the basis of previous work,this study intends to systematically explore the effect of salvianolic acid B on ovariectomized mice with osteoporosis,and its effect on the osteogenic differentiation of mouse mesenchymal stem cells（MSCs）．Methods Eighteen eight-week-old SPF C57 female mice were divided into sham operation group,osteoporosis group and salvianolic acid B treatment group（6 mice in each group）．The osteoporosis group and salvianolic acid B group underwent bilateral ovariectomy．The sham group maintained normal ovarian structure while removing local fat tissue．All three groups were given antibiotics for anti-infection treatment within 3 days after operation．Within 4 weeks,salvianolic acid B treatment group was given salvianolic acid B 2.5 mg/kg intraperitoneal injection for 12 weeks,once every 2 days,and the other 2 groups were given the same amount of saline at the same time．After 16 weeks,all mice were sacrificed under anesthesia．The bone density of the mouse right posterior femur was measured by MicroCT．The expressions of Runx2 and Osterix in the bone marrow of mouse left posterior femur were analyzed by qRT-PCR．The right posterior femur of mice was ground with liquid nitrogen to extract protein,and the contents of OPG and RANKL were determined by WB．Results The bone mineral density of the femur in the osteoporosis group was lower than that in the sham operation group（P<0.05）,and the bone mineral density of the femur in the salvianolic acid B treatment group was higher than that in the osteoporosis group,but the difference was not significant（P<0.05）．The levels of Runx2 and Osterix in the osteoporosis group were significantly lower than those in the sham operation group（P<0.05）,and the levels of Runx2 and Osterix in the salvianolic acid B treatment group were higher than those in the osteoporosis group（P<0.05）．The levels of OPG and RANKL protein in the osteoporosis group were significantly lower than those in the sham operation group（P<0.05）,while the levels of OPG and RANKL protein in the salvianolic acid B group were higher than those in the osteoporosis group（P<0.05）．Conclusions The early stage of postmenopausal osteoporosis has certain effects on osteoporosis in mice,but more experiments are needed to verify the conclusions of this study．

目的 通过生物信息学方法,分析阿司匹林抗结直肠癌的作用机制。方法 在DrugBank 5.1.5中查找阿司匹林的直接作用蛋白靶点(direct protein targets,DPTs);构建阿司匹林DPTs的蛋白质-蛋白质相互作用(protein-protein interaction,PPI)网络并分析相关信号通路;从GEO数据库中获取结直肠癌表达谱芯片数据,筛选中心度最高的20个结直肠癌差异表达基因作为Hub基因;将DPTs相互关联基因与结直肠癌Hub基因求交集,确认阿司匹林抗结直肠癌的潜在作用靶点,分析其在TCGA数据库结肠腺癌样本中的表达情况,并进行GO功能富集分析和KEGG信号通路分析。最终通过RT-PCR和WB实验验证阿司匹林抗结直肠癌的潜在靶点。结果 在DrugBank 5.1.5中确定了11个阿司匹林DPTs,KEGG信号通路分析发现其中6个DPTs(EDNRA,IKBKB,NFKB2,NFKBIA,PTGS2,TP53)与癌症的发生发展有关。将DPTs相关联基因与筛选的20个结直肠癌Hub基因求交集,发现5个基因(CDK1,AURKA,CCNB1,MAD2L1,TPX2)可能是阿司匹林抗结直肠癌的潜在作用靶点,其在TCGA数据库结肠腺癌样本中均表达上调,基因功能主要富集于细胞周期调控。RT-PCR和WB实验结果显示阿司匹林可以降低人结肠癌细胞中CDK1,AURKA,CCNB1,MAD2L1,TPX2的mRNA水平和蛋白表达。结论 CDK1,AURKA,CCNB1,MAD2L1,TPX2可能是阿司匹林抗结直肠癌的潜在靶点,其可能通过影响细胞周期调控发挥抗肿瘤作用。

Objective To analyze the mechanism of aspirin against colorectal cancer(CRC)by bioinformatic analysis. Methods DrugBank 5.1.5 was used to identify direct protein targets (DPTs) of aspirin. The protein-protein interaction (PPI) network of DPTs was constructed and involved signaling pathways were analyzed. CRC-associated gene expression datasets were downloaded from GEO database, and the top twenty differentially expressed genes with the highest degree were screened out as Hub genes. Common genes between the genes associated with the DPTs and the Hub genes of CRC were the potential targets of aspirin against CRC. The potential targets in TCGA database colon adenocarcinoma (COAD) samples were examined. GO functional enrichment analysis and KEGG signaling pathway analysis of the potential targets were performed. The potential targets of aspirin against CRC cells were verified by reverse transcription-polymerase chain reaction (RT-PCR) and western blot (WB). Results Eleven DPTs of aspirin were identified in DrugBank 5.1.5. KEGG signaling pathway showed that 6 genes (EDNRA, IKBKB, NFKB2, NFKBIA, PTGS2, TP53) were associated with the occurrence and development of CRC. By intersecting 20 Hub genes of CRC with genes associated with the DPTs of aspirin, it was found that 5 genes (CDK1, AURKA, CCNB1, MAD2L1, TPX2) might be the potential targets of aspirin against CRC. They were all up-regulated in TCGA-COAD samples, and the gene functions were mainly enriched in cell cycle regulation. The results of RT-PCR and WB showed that aspirin could down-regulate the mRNA and protein expression levels of CDK1, AURKA, CCNB1, MAD2L1 and TPX2 in human colon cancer cells respectively. Conclusion CDK1, AURKA, CCNB1, MAD2L1 and TPX2 could be potential targets of aspirin against CRC by affecting the progress of cell cycle regulation.

目的 基于网络药理学方法预测银杏叶治疗心肌缺血的潜在靶点及信号通路。方法 利用 TCMSP 平台筛选生物利用度(OB)≥ 30% 和类药性(DL)≥ 0.18 的活性成分及作用靶点。利用GeneCards和OMIM数据库检索心肌缺血疾病相关靶点,并提取药物成分和心肌缺血疾病的共有靶点作为关键靶点。通过在线TRING平台构建PPI网络,并采用Cytoscape 软件构建可视化的“化合物-靶点-通路”网络,进一步进行GO 功能富集分析和KEGG通路富集分析。结果 筛选得到 27种潜在的药效成分,2 164个化合物靶点,531个心肌缺血相关靶基因。两者取交集后获得疾病-类药活性成分40个共同靶点,PPI 蛋白互作网络自由度较高的节点依次为:IL6、VEGFA、CASP3、MAPK8、MYC、NOS3。GO 功能富集分析得到42个 GO 条目,KEGG 通路富集分析得到42条信号通路。结论 银杏叶治疗心肌缺血主要GO 能力富集在半胱氨酸肽链内切酶活性,内肽酶活力,激活转录因子结合,DNA结合转录激活剂活性,RNA聚合酶II特异性等功能,调控TNF信号通路,糖尿病并发症的年龄愤怒信号, 细胞凋亡,PI3K-Akt信号通路等信号,进一步达到对心肌缺血疾病的治疗。

Objective To predict the potential targets and signal pathways of ginkgo leaf in the treatment of myocardial ischemia based on network pharmacology. Methods The active components and targets of bioavailability (OB) ≥ 30% and drug-like (DL) ≥ 0.18 were screened by TCMSP platform.The related targets of myocardial ischemic diseases were searched by GeneCards and OMIM database, the components and the common targets of myocardial ischemic diseases were extracted as the key targets. To build the PPI network through the online STRING platform, a visual “compound-target-pathway” network was constructed to further analyze the functional enrichment of GO and the enrichment of KEGG pathway. Results 27 potential active components, 2 164 compound targets and 531 myocardial ischemia related target genes were screened. After the intersection of the two, 40 common targets of disease-class active components were obtained. The nodes with higher degree of freedom of PPI protein interaction network were IL6、VEGFA、CASP3、MAPK8、MYC and NOS3.42 entries were obtained by GO functional enrichment analysis and 42 signal pathways were obtained by KEGG pathway enrichment analysis. Conclusion Ginkgo leaf may be a target of cysteine-type endopeptidase activity,endopeptidase activity,activating transcription factor binding,DNA-binding transcription activator activity, RNA polymerase II-specific function. TNF signaling pathway, AGE-RAGE signaling pathway in diabetic complications, apoptosis, PI3K-Akt signaling pathway were regualted to achieve the treatment of myocardial ischemia disease.

目的 利用分析各种浓度环氧化酶-2(COX-2)特异度抑制剂塞来昔布对食管癌EC109细胞系的作用,进而对COX-2蛋白表达的影响及对细胞凋亡能力的作用,进一步探讨塞来昔布对食管癌细胞凋亡的作用及机制。方法 使用0 μmol/L、20 μmol/L、60 μmol/L、100 μmol/L四个浓度的塞来昔布处理EC109细胞24 h,酶联免疫吸附剂测定(ELISA)法测定COX-2蛋白表达;流式细胞仪测定EC109细胞凋亡情况。结果 与0 μmol/L塞来昔布组比较,20 μmol/L、60 μmol/L、100 μmol/L塞来昔布组EC109细胞内COX-2蛋白表达不断降低(1.581±0.116;1.226±0.089,0.846±0.076,0.521±0.082)(P<0.05);而细胞凋亡率逐步上升(1.700±0.557,13.400±1.735,18.766±1.301,28.100±1.997)(P<0.05)药物浓度依赖于梯度。结论 塞来昔布是一种COX-2抑制剂,可能以浓度梯度的形式抑制COX-2蛋白的表达,从而促进EC109细胞的凋亡。

Objective The effects of celecoxib, a specific COX-2 inhibitor at various concentrations, on EC109 cell line of esophageal cancer were analyzed, and the effect and mechanism of celecoxib on apoptosis of esophageal carcinoma cells were further studied. Methods EC109 cells were treated with celecoxib at concentrations of 0 μmol/L, 20 μmol/L, 60 μmol/L and 100 μmol/L for 24 h. The protein of COX-2 in EC109 cells was determined by enzyme-linked immunosorbent assay (ELISA). Assay of EC109 cell apoptosis were determined by flow cytometry. Results Compared with the 0μmol/L celecoxib group, the expression of COX-2 protein in EC109 cells of 20μmol/L, 60μmol/L, 100μmol/L celecoxib group gradually decreased(1.581±0.116; 1.226±0.089, 0.846± 0.076, 0.521±0.082) (P<0.05); and the apoptotic rate gradually increased (1.700±0.557; 13.400±1.735, 18.766±1.301, 28.100±1.997) (P<0.05) in a drug concentration gradient-dependent manner. Conclusion The COX-2 inhibitor celecoxib may inhibit the expression of COX-2 protein in a concentration gradient and promote the apoptosis of esophageal cancer EC109 cells.

目的 利用GEPIA数据库,包括TCGA数据库和GTEX数据库,探讨二氢丹参酮I通过氧化应激治疗胃癌的潜在靶点。方法 在数据库中检索二氢丹参酮I在胃癌中潜在靶点的文献,利用GEPIA数据库工具分析二氢丹参酮I在胃癌中的潜在作用机制,分析潜在靶基因与表达关键抗氧化应激蛋白基因的相关性;二氢丹参酮I对胃癌潜在靶基因表达水平的分析;二氢丹参酮I对胃癌潜在靶基因的预后分析。结果 二氢丹参酮I对潜在靶基因的主要靶向基因(蛋白)为缺氧诱导因子-1(hif-1)和瓜氨酸组蛋白h3(cith3),其基因分别为HIF1 A和NOS2;GEPIA数据库显示HIF1 A与CAT(P=e-04,r=0.18)、GPX1(P=0.033,r=0.11)或NFE2L2呈正相关。(P=0,r=0.41),而NOS2与SOD1仅呈正相关(P=0.21,r=0.18),与其它三个基因均无相关性;HIF1 A和NOS2在胃癌组织中的表达水平高于正常胃旁组织;HIF1 A的高表达降低了胃癌患者的总生存率。结论 二氢丹参酮I可通过活性氧介导的氧化应激诱导AGS细胞凋亡,抑制HIF1 A和NOS2的表达,从而抑制AGS细胞的抗氧化应激,提高胃癌患者的总生存率。

Objective In this study, GEPIA database, including TCGA database and GTEx database, were used to explore the potential targets of dihydrotanshinone I on gastric cancer through oxidative stress. Methods Literatures on potential targets of dihydrotanshinone I in gastric cancer were searched in the database;GEPIA database tool was used to analyze the potential mechanism of dihydrotanshinone I on gastric cancer;taking analysis of the correlation between potential target genes and genes expressing key antioxidant stress proteins;We had analysis of expression level of dihydrotanshinone I on potential target genes in gastric cancer patients;and prognostic analysis of dihydrotanshinone I on potential target genes in gastric cancer patients. Results The main targeting genes(proteins) of dihydrotanshinone I on potential target genes were hypoxia inducible factor-1(hif-1) and citrulline histone H3(CITH3), whose genes were HIF1 A and NOS2, respectively;GEPIA database showed that there was a positive correlation between HIF1 A and CAT(P=2e-04, R=0.18), GPX1(P=0.033, R=0.11), or NFE2L2(P=0, R=0.41), while NOS2 only had a positive correlation with SOD1(P=0.21, R=0.18), and no correlation with other three genes. The expression levels of HIF1 A and NOS2 in gastric cancer tissues were higher than those in normal adjacent gastric tissues. The overall survival rate of patients with gastric cancer decreased with the high expression of HIF1 A. Conclusion Dihydrotanshinone I may induce apoptosis of AGS cells through reactive oxygen species mediated oxidative stress, and inhibit the expression of HIF1 A and NOS2, thus inhibit their antioxidative stress, which may improve the overall survival rate of gastric cancer patients.

目的 探讨骨髓间充质干细胞源性微泡(BMSC-MV)修复大鼠早发性卵巢功能不全的自噬机制。方法 大鼠骨髓分离培养骨髓间充质干细胞;超速离心法从骨髓间充质干细胞培养液中分离微泡;腹腔注射顺铂溶液制备早发性卵巢功能不全(POI)模型,制备后3 d尾静脉取血ELISA检测血清雌二醇(E2)及卵泡刺激素(FSH);尾静脉注射BMSC-MV移植治疗POI大鼠模型,移植后28 d尾静脉取血ELISA检测E2、FSH及抗苗勒管激素(AMH),同时取卵巢组织检测自噬相关蛋白LC3及P62。结果 模型对照组及微泡移植组在模型制备后3 d的E2 含量低于正常对照组,FSH 含量高于正常对照组(P<0.001);微泡移植组在移植后28 d的E2、AMH含量高于模型对照组(P<0.001),FSH含量低于模型对照组(P<0.001);微泡移植组的LC3较模型对照组表达升高,而P62表达降低(P<0.001)。结论 BMSC-MV介导自噬修复大鼠早发性卵巢功能不全。

Objective To investigate the autophagy mechanism of bone marrow mesenchymal stem cell-derived microvesicle (BMSC-MV) in repairing premature ovarian dysfunction in rats. Methods The whole bone marrow adherence method was used to isolate,culture and identify BMSCs of SD rats. Microvesicles were isolated from bone marrow mesenchymal stem cell by ultracentrifugation. Premature ovarian insufficiency (POI) model was prepared by intraperitoneal injection of cisplatin solution,and serum estradiol (E2) and follicular stimulating hormone (FSH) were detected by ELISA from tail vein 3 days after preparation. Rat model of POI was treated with BMSC-MV transplantation by tail vein. Blood from tail vein was collected 28 days after transplantation to detect E2,FSH and AMH by ELISA. Meanwhile,ovarian tissues were collected to detect autophagy-related proteins LC3 and P62. Results The E2 content of the model control group and the microvesicle transplantation group was lower than that of the normal control group,and the FSH content was higher than that of the normal control group (P<0.001). The content of E2 and AMH in the microvesicle transplantation group at 28 days after transplantation was higher than that in the model control group (P<0.001),and the content of FSH was lower than that in the model control group (P<0.001). Compared with the model control group,LC3 expression in the microvesicle transplantation group was increased,while P62 expression was decreased (P<0.001). Conclusion BMSC -MV mediate autophagy to repair premature ovarian insufficiency in rats.

目的 运用网络药理学方法预测生白术活性成分、作用靶点及生物学意义,探讨其防治便秘的作用机制,并结合导师临床应用取得的疗效进行进一步的验证。方法 借助TCMSP在线数据库查找白术的药效成份并选择其生物利用度(OB)>30%且类药性(DL)>0.18的化合物,并查询每种成分所对应的靶标。通过Gene Cards、OMIM共2个疾病相关靶点的数据库检索便秘相关靶点信息。将二者靶基因相映射获得交集靶点。借助 cytoscape 3.7.1 软件对查询结果进行可视化。所得到的基因通过相互作用数据库(STRING)进行相互作用蛋白查询并构建蛋白质相互作用(PPI)网络。使用R语言对关键靶点行GO和KEGG富集分析,以构建“成分-靶点-信号通路”的网络。结果 共得到白术人源靶蛋白7个,便秘相关的人源基因2 859个。发现其主要通过干预PGR、CHRM3、CHRM1、ACHE、CHRM2五个基因并参与胆碱能突触、钙信号通路、肌动蛋白细胞骨架的调控、神经活性配体-受体相互作用、cAMP信号通路、PI3K-AKT信号通路共6条信号通路以达到防治便秘的效果。结论 应用网络药理学方法分析预测得到重用生白术防治便秘的潜在药效成分、作用靶点及其信号通路,为临床应用提供了理论依据。

Objective To predict the active ingredients, targets and biological significance of Atractylodes macrocephala by network pharmacology, to explore the mechanism of its prevention and treatment of constipation, and to further verify its efficacy in combination with the clinical application of tutors. Methods The constituents of Atractylodes macrocephala were searched by TCMSP database and the compounds with bioavailability (OB) > 30% and drug-like property (DL) > 0.18 were screened, and the corresponding targets of each constituent were queried. Constipation-related target information was retrieved from two disease-related target databases of GeneCards and OMIM, mapping the two target genes to obtain intersecting targets, by visualization of query results with cytoscape 3.7.1. The resulting genes were queried by the interaction database (STRING) and the protein interaction (PPI) network was constructed. GO and KEGG enrichment analysis of key targets was carried out by R language in order to construct the network of “component-target-signal pathway”. Results Seven human target proteins and 2 859 constipation related human genes were obtained from Atractylodes macrocephala. It was found that the effect of prevention and treatment of constipation was mainly achieved by interfering with five genes of PGR, CHRM3, CHRM1, ACHE and CHRM2 and participating in six signaling pathways: cholinergic synapse, calcium signaling pathway, regulation of actin cytoskeleton, neuroactive ligand-receptor interaction, cAMP signaling pathway and PI3K-AKT signaling pathway. Conclusion The potential pharmacodynamic components, targets and signaling pathways of reuse Rhizoma atractylodis macrocephalae in the prevention and treatment of constipation can be predicted by network pharmacological method, which provides a theoretical basis for clinical application.

目的 探究血清外泌体对小鼠烫伤伤口愈合的促进作用及机制。方法 选取我院60只NIH小鼠作为研究对象,对其血清中的外泌体进行提取和分离,建立起皮肤烫伤模型。采用血清外泌体进行治疗,评估治疗的效果,观察皮肤组织的病理变化,检测小鼠成纤维细胞增殖和表皮HaCat细胞迁移使用血清外泌体受到的影响。结果 空白对照组和血清外泌体小鼠烫伤创口愈合时间比较,差异有统计学意义(P＜0.05);血清外泌体作用24 h后,不同剂量OD值差异有统计学意义(P＜0.05);10 μL Exo组和PBS组内部不同时间点OD值差异均有统计学意义(P＜0.05);外泌体组和PBS组24 h的HaCat细胞迁移率相比较,差异有统计学意义(P＜0.05)。结论 血清外泌体可以促进小鼠烫伤伤口的愈合,对成纤维细胞的增殖和表皮HaCat细胞的迁移作用也比较显著,可能成为临床治疗烫伤的新手段。

目的 探讨血必净注射液对SAP大鼠TLR4信号通路介导肠黏膜屏障功能障碍的影响。方法 24只SD大鼠随机分成空白组(n=8)、对照组(n=8)和治疗组(n=8)。对照组和治疗组用4.5%牛磺胆酸钠溶液胆胰管逆行注射制备SAP模型,空白组采用等量生理盐水逆行注射。治疗组在造模3 h后经鼠尾静脉注射血必净注射液(3 mL/kg)。三组大鼠造模后观察24 h,然后处死取胰腺和小肠组织送病理检查,采用荧光RT-PCR技术检测TLR4和NF-κB表达水平,采用ELSIA法检测血清TNF-α、IL-6、淀粉酶(AMS)及二胺氧化酶(DAO)水平,比较三组大鼠各项指标。结果 对照组和治疗组小肠组织TLR4和NF-κB表达以及血清TNF-α、IL-6、AMS及DAO水平均高于空白组(P>0.05),治疗组小肠组织TLR4和NF-κB表达以及血清TNF-α、IL-6、AMS及DAO水平低于对照组(P＜0.05)。结论 血必净注射液通过干预SAP大鼠TLR4信号通路,降低小肠组织TLR4和NF-κB的表达,减轻小肠组织的炎症反应,对肠黏膜屏障具有一定的保护作用。

Objective To investigate the effect on intestinal mucosal barrier dysfunction (IBF) of Xuebijing injection mediated by Toll-like receptor 4 (TLR4) signal pathway in rats of severe acute pancreatitis (SAP). Methods 24 Sprague Dawley (SD) rats were randomly divided into Sham group (n=8), control group (n=8) and treatment group (n=8). The SAP model was established by retrograde injection of 4.5% sodium taurocholate into the biliopancreatic duct in control group and treatment group, while control group was injected with the same amount of saline. In treatment group, Xuebijing injection (3 mL/kg) was injected via tail vein after 3h of modeling. All rats were monitored and sacrificed after 24 hours of modeling. Samples of pancreas and intestine were collected for pathologic determination. A fluorescent RT-PCR was used to determine the expression of TLR4 and NF-κB of small intestine. The serum levels of TNF-α, IL-6, amylase (AMS) and diamine oxidase (DAO) were measured by using ELISA. All parameters of three groups were compared. Results The expression of TLR4 and NF-κB of small intestine in control group and treatment group were higher than it in control group (P<0.05), as well as the serum levels of TNF-α, IL-6, AMS and DAO (P<0.05). The expression of TLR4 and NF-κB of small intestine in treatment group were lower than it in control group (P<0.05), as well as the serum levels of TNF-α, IL-6, AMS and DAO (P<0.05). Conclusion Xuebijing injection may not only reduce the expression of TLR4 and NF-κB of small intestine, but also alleviate the inflammation reaction of small intestine by interfering with TLR4 signal pathway, which may have a protective effect on intestinal mucosal barrier in SAP rats.