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亮氨酸 1

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of RNA interference targeting angiotensin 1a receptor on blood pressure and cardiac hypertrophy of rats

ZHANG Jingqun, SUN Honglei, MA Yexin, WANG Daowen

《医学前沿（英文）》 2008年 第2卷 第1期   页码 19-24 doi: 10.1007/s11684-008-0005-2

摘要： The aim of this study is to investigate the effects of RNA interference (RNAi) targeting angiotensin 1a receptor (AT1a) on blood pressure and cardiac hypertrophy of rats with renovascular hypertension. Two RNAi plasmids, pAT1a-shRNA1 and pAT1a-shRNA2 each carrying a U6 promoter and an AT1a-specific shRNA-coding template sequence corresponding to the sites 928–946, 978–996 of the mRNA transcript, and a control plasmid pCon carrying a nonspecific shRNA-coding sequence were constructed. Thirty Sprague – Dawley rats with renovascular hypertension (2-kidney 1-clip) were randomly divided into 5 equal groups: Control group (without any intervention), pAT1a-shRNA1, pAT1a-shRNA2, pCon groups (with injection of the corresponding plasmid 4 mg/kg respectively into the tail vein), and valsartan group (30 mg/kg·d by gavage). Three weeks after drug administration, pAT1a-shRNA1, pAT1a-shRNA2 and valsartan respectively resulted in decrease of the tail blood pressure by (15.1 ± 5.4), (16.4 ± 8.4) and (30.6 ± 18.2) mmHg. However, the tail blood pressure increased further by about 25 mmHg in both of pCon and control groups. The carotid artery pressures of pAT1a-shRNA1, pAT1a-shRNA2 and valsartan groups were all significantly lower than those of the control and pCon groups. The ratio of left ventricle weight to body weight (LV/BW) of the rats in pAT1a-shRNA1, pAT1a-shRNA2, and valsartan groups decreased significantly than in the control group ( < 0.01), similar to those of the normal SD rats( > 0.05). Histopathological examination showed that the myocardiocytes were significantly hypertrophic and the basal membrane of the aorta was significantly thickened in the control group and such changes were alleviated in the pAT1a-shRNA1, pAT1a-shRNA2 and valsartan groups. Compared with the control group, pAT1a-shRNA1 and pAT1a-shRNA2 groups had lowered expression of AT1 receptor (in the myocardium and the thoracic aorta (all < 0.01); however, there were no significant differences in expression levels of AT1 receptor in valsartan and the control groups ( > 0.05). We conclude that RNAi targeting AT1a receptor inhibits the development of renovascular hypertension and the accompanying cardiac hypertrophy. RNAi technology may become a new strategy of gene therapy for hypertension.

关键词： therapy     Sprague     administration     cardiac hypertrophy     valsartan    

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Effect of Feixian Recipe on laminin, collagen I and III in rats with pulmonary fibrosis induced by bleomycin

ZHANG Xiaomei, JIANG Liangduo, ZHANG Wei, WU Jianjun, LU Xiangfeng

《医学前沿（英文）》 2008年 第2卷 第3期   页码 314-316 doi: 10.1007/s11684-008-0060-8

摘要： The aim of this paper is to observe the effect of the Feixian Recipe on pulmonary fibrosis in rats. A rat model with pulmonary fibrosis was established by intratracheal injection of bleomycin. On days 14, 28 and 45, the contents of laminin, collagen I and collagen III in lung tissue homogenate in the model group, the sham operated group, the Feixian group and the prednisone group were measured. The contents of laminin and collagen I and III were decreased significantly by the Feixian Recipe. Feixian Recipe has a significant therapeutic effect on bleomycin-induced pulmonary fibrosis in rats.

关键词： bleomycin     intratracheal injection     prednisone     collagen     bleomycin-induced pulmonary    

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Structural shifts in the intestinal microbiota of rats treated with cyclosporine A after orthotropic

Junjun Jia, Xinyao Tian, Jianwen Jiang, Zhigang Ren, Haifeng Lu, Ning He, Haiyang Xie, Lin Zhou, Shusen Zheng

《医学前沿（英文）》 2019年 第13卷 第4期   页码 451-460 doi: 10.1007/s11684-018-0675-3

摘要： Understanding the effect of immunosuppressive agents on intestinal microbiota is important to reduce the mortality and morbidity from orthotopic liver transplantation (OLT). We investigated the relationship between the commonly used immunosuppressive agent cyclosporine A (CSA) and the intestinal microbial variation in an OLT model. The rat samples were divided as follows: (1) N group (normal control); (2) I group (isograft LT, Brown Norway [BN] rat to BN); (3) R group (allograft LT, Lewis to BN rat); and (4) CSA group (R group treated with CSA). The intestinal microbiota was assayed by denaturing gradient gel electrophoresis profiles and by using real-time polymerase chain reaction. The liver histopathology and the alanine/aspartate aminotransferase ratio after LT were both ameliorated by CSA. In the CSA group, the numbers of rDNA gene copies of cluster I, cluster XIV, and Enterobacteriaceae decreased, whereas those of increased compared with the R group. Cluster analysis indicated that the samples from the N, I, and CSA groups were clustered, whereas the other clusters contained the samples from the R group. Hence, CSA ameliorates hepatic graft injury and partially restores gut microbiota following LT, and these may benefit hepatic graft rejection.

关键词： microbial community     liver transplantation     immunosuppressive agents     cyclosporine A    

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Alleviation of cell damage in experimental ANP in rats by administration of chondroitin-sulfate reduces

HE Zhongye, GUO Renxuan, LI Yang, XIE Chengyao, LIU Nan, SONG Wen

《医学前沿（英文）》 2007年 第1卷 第1期   页码 36-40 doi: 10.1007/s11684-007-0007-5

摘要： In order to explore the effects of retrograde infusion of chondroitin-sulfate via the pancreatic duct on cytoprotection and attenuation of oxidative damage during acute necrotic pancreatitis (ANP), male Wistar rats were randomly divided into three groups: A, B (experimental groups) and C (sham operation, control group). The rats in group A was subjected to retrograde injection of 5% sodium taurocholate via the pancreatic duct, and those in group B received chondroitin-sulfate therapy after ANP induction. All rats in three groups were killed at 6 h. The levels of malondialdehyde (MAD), total superoxide dismutase (SOD), glutathione (GSH), adenosine triphosphate (ATP) and serum amylase (SAM) were measured. The morphologic changes in pancreatic tissues were observed. It was found that the level of SAM was increased in group A and group B, with corresponding pathological changes of ANP. The levels of ATP, GSH and SOD in group A were decreased markedly and MDN increased significantly as compared with those in group B (P<0.01). In group B, the histopathologic damage was attenuated to a certain extent in comparison to that in group A. It was concluded that endogenous antioxidants were significantly reduced and lipid peroxidation increased during ANP. Retrograde infusion of chondroitin-sulfate via pancreatic duct could alleviate the pancreatic cell damage as a sort of scavengers of oxygen free radicals.

关键词： control     Wistar     taurocholate     superoxide dismutase     chondroitin-sulfate therapy    

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Sensory innervation of the anterior eye segment in rats: a retrograde tracing study

Haixia LIU MD , Zhiwang LI MD , Min YANG MD , Xiang TIAN MS , Chaoying LI PhD , Lei PEI PhD ,

《医学前沿（英文）》 2009年 第3卷 第3期   页码 352-356 doi: 10.1007/s11684-009-0065-y

摘要： This study aimed to investigate the sensory innervation of the anterior eye segment in rats by retrograde tracing with 1,1-dioleyl-3,3,3,3-tetrameth-ylindocarbocyanine, 4-chlorobenesulfonate (FAST Dil) injected into the anterior chamber. In our study, the sensory innervation of distinct elements of the anterior segment of the rat’s eye, i.e. the cornea, ciliary body, iris, and trabecular meshwork, were studied by retrograde tracing using FAST Dil as a tracer. FAST Dil was injected into the anterior chambers of the rat’s eyes. The animals were sacrificed at different time points, i.e., 2, 3, 4, and 5 days after the injection. FAST Dil localization in trigeminal ganglions was studied with a fluorescent microscope. Two days after FAST Dil injection into the anterior chambers, the cornea, the ciliary body, the iris, and the trabecular meshwork were heavily labeled. Neurons in the ipsilateral trigeminal ganglion were also consistently labeled. The number of labeled cells increased over time until 4 days after FAST Dil injection. FAST Dil-labeled neurons could be divided into two parts. Most of the Dil-labeled neurons were concentrated in a sharp, longitudinal, spindle-like stripe, located in the dorso-medial side of the trigeminal ganglion, approximately two thirds of the dorsal portion. The other part of Dil-labeled neurons scattered laterally to the stripe, but just in one third of the dorsal region. Thus, with our preliminary results, we conclude that the primary afferent sensory neurons innervating the rat’s anterior eye segments aggregate in the dorso-medial part of the ipsilateral trigeminal ganglion. It is feasible to identify them using retrograde tracing with FAST Dil anterior chamber injection.

关键词： trigeminal ganglion     retrograde tracing    

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of beta-elemene on the levels of plasma endotoxin, serum TNF-alpha, and hepatic CD14 expression in rats

null

《医学前沿（英文）》 2011年 第5卷 第1期   页码 101-105 doi: 10.1007/s11684-011-0111-4

摘要：

It has been demonstrated that β-elemene could protect against carbon tetrachloride (CCl4)-induced liver fibrosis in our laboratory work, and the aim of this paper is to reveal the protective mechanisms of β-elemene. The hepatic fibrosis experimental model was induced by the hypodermical injection of CCl4 in Wistar male rats. β-elemene was intraperitoneally administered into rats for 8 weeks (0.1 mL/100 g bodyweight per day), and plasma endotoxin content was assayed by biochemistry. The serum TNF-α level was detected using radioactive immunity. CD14 expression in rat livers was measured by immunohistochemistry and Western blot. The results showed that β-elemene can downregulate the levels of plasma endotoxins, serum TNF-α, and hepatic CD14 expression in rats with liver fibrosis. β-elemene plays an important role in downregulating the lipopolysaccharide signal transduction pathway, a significant pathway in hepatic fibrosis development.

关键词： liver fibrosis     beta-elemene     endotoxin     CD14    

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monocarboxylate transporter 1 aggravates white matter injury after experimental subarachnoid hemorrhage in rats

《医学前沿（英文）》 2021年 第15卷 第6期   页码 887-902 doi: 10.1007/s11684-021-0879-9

摘要： Monocarboxylic acid transporter 1 (MCT1) maintains axonal function by transferring lactic acid from oligodendrocytes to axons. Subarachnoid hemorrhage (SAH) induces white matter injury, but the involvement of MCT1 is unclear. In this study, the SAH model of adult male Sprague-Dawley rats was used to explore the role of MCT1 in white matter injury after SAH. At 48 h after SAH, oligodendrocyte MCT1 was significantly reduced, and the exogenous overexpression of MCT1 significantly improved white matter integrity and long-term cognitive function. Motor training after SAH significantly increased the number of ITPR2+SOX10+ oligodendrocytes and upregulated the level of MCT1, which was positively correlated with the behavioral ability of rats. In addition, miR-29b and miR-124 levels were significantly increased in SAH rats compared with non-SAH rats. Further intervention experiments showed that miR-29b and miR-124 could negatively regulate the level of MCT1. This study confirmed that the loss of MCT1 may be one of the mechanisms of white matter damage after SAH and may be caused by the negative regulation of miR-29b and miR-124. MCT1 may be involved in the neurological improvement of rehabilitation training after SAH.

关键词： microRNAs     monocarboxylate transporter 1     motor training     subarachnoid hemorrhage     white matter injury    

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Protective effect of tanshinone II A on signal transduction system protein kinase B in rats with myocardial

Enyuan TU MD, Yongjun PAN MM, Kang ZHENG MM, Zhaohua WANG MD, Qiansheng LIANG MD, Guangtian YANG MD,

《医学前沿（英文）》 2009年 第3卷 第4期   页码 431-436 doi: 10.1007/s11684-009-0088-4

摘要： The effects of tanshinone II A on cell signal transduction system protein kinase B in rats with myocardial hypertrophy induced by the abdominal aorta partial coarctation were investigated. Rat models of myocardial hypertrophy were established by using abdominal aorta partial coarctation method. Forty-eight rats were randomly divided into sham group (S group), model group (M group), valsartan treatment group (X group), low-dose tanshinone treatment group (LD group), medium-dose tanshinone treatment group (MD group), and high-dose tanshinone treatment group (HD group) (=8 in each group). Left ventricular mass index (LVMI), left ventricular posterior wall (LVPW), and septal thickness (IVS) were detected by high frequency ultrasonography. Myocardial fiber diameter (MFD) was examined by Hematoxylin-Eosin (HE) staining, and the contents of phosphorylated protein kinase B (p-Akt) and p-Gsk3β in myocardium were assayed by Western blot. The results showed that compared with S group, the values of LVMI, LVPW, IVS and MFD were increased in other groups (<0.05), and the contents of p-Akt, and p-Gsk3β were also increased in other groups. As compared with MD group, the values of LVMI, LVPW, IVS and MFD were decreased in all treatment groups (<0.05), and the contents of p-Akt, and p-Gsk3β were also decreased in all treatment groups. However, there were no significant differences among LD, MD, and HD groups (>0.05), and there were no significant differences between X group and tanshinone treatment groups (>0.05). It was suggested that tanshinone II A could prevent myocardial hypertrophy by its action on the Akt signaling pathway.

关键词： tanshinone II A     myocardial hypertrophy     rat     protein kinase B     abdominal aorta coarctation    

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A better way to do small-for-size liver transplantation in rats

null

《医学前沿（英文）》 2011年 第5卷 第1期   页码 106-110 doi: 10.1007/s11684-011-0113-2

摘要：

Establishing a model for small-for-size liver transplantation is the basis for this study of partial and living donor graft liver transplantation. This study aims to explore a simpler and more effective way of establishing a 30% small-for-size liver transplantation in rats. Sprague-Dawley rats were selected as the donors and recipients. Small-for-size orthotopic liver transplantation was performed using Kamada’s two-cuff method. The donor’s liver was flushed via the abdominal aorta and hepatectomy was performed in situ. The animals were divided into three groups depending on the graft selected, with 40 pairs of rats in each group. In group I, the median lobe of the liver was used as graft; in group II, the right half of the median lobe and the right lobe were used as graft; and in group III, the median and right lobes were used as graft. In groups I and II, the bodyweights of donors were the same as those of recipients; however, in group III the bodyweights of donors were 100–120 g less than those of the recipients. The duration needed for transplantation, the 7-day survival rates, and the technical complication rates were compared among these three groups. The time required for hepatectomy was shorter in group III compared with groups I and II (8.8?±?0.7 min vs. 11.5?±?1.1 min and 10.1?±?1.0 min, P = 0.001). The cold ischemia time for the grafts, the anhepatic times, and the transplantation times for the recipients were not significantly different among the three groups. Compared with groups I and II, the incidence of bleeding, bile leakage, and inferior vena caval strictures were significantly decreased in group III (P<0.05). No significant differences between the three groups were found based on other complications after the operation (P>0.05). Group III had better 7-day survival rates and longer median survival times but the differences were not statistically significant. The method of small for donor bodyweight using the median and right lobes for grafting may be a more effective and simpler way of establishing a 30% small-for-size liver transplantation in rats, as shown by the shorter hepatectomy time and the occurrence of fewer complications after the operation.

关键词： liver transplantation     small-for-size     rats    

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promotes the survival and neuronal differentiation of hypoxia-conditioned neuronal progenitor cells in rats

Yao Yao, Rui Zhou, Rui Bai, Jing Wang, Mengjiao Tu, Jingjing Shi, Xiao He, Jinyun Zhou, Liu Feng, Yuanxue Gao, Fahuan Song, Feng Lan, Xingguo Liu, Mei Tian, Hong Zhang

《医学前沿（英文）》 2021年 第15卷 第3期   页码 472-485 doi: 10.1007/s11684-021-0832-y

摘要： Hypoxia conditioning could increase the survival of transplanted neuronal progenitor cells (NPCs) in rats with cerebral ischemia but could also hinder neuronal differentiation partly by suppressing mitochondrial metabolism. In this work, the mitochondrial metabolism of hypoxia-conditioned NPCs (hcNPCs) was upregulated via the additional administration of resveratrol, an herbal compound, to resolve the limitation of hypoxia conditioning on neuronal differentiation. Resveratrol was first applied during the neuronal differentiation of hcNPCs and concurrently promoted the differentiation, synaptogenesis, and functional development of neurons derived from hcNPCs and restored the mitochondrial metabolism. Furthermore, this herbal compound was used as an adjuvant during hcNPC transplantation in a photothrombotic stroke rat model. Resveratrol promoted neuronal differentiation and increased the long-term survival of transplanted hcNPCs. 18-fluorine fluorodeoxyglucose positron emission tomography and rotarod test showed that resveratrol and hcNPC transplantation synergistically improved the neurological and metabolic recovery of stroke rats. In conclusion, resveratrol promoted the neuronal differentiation and therapeutic efficiency of hcNPCs in stroke rats via restoring mitochondrial metabolism. This work suggested a novel approach to promote the clinical translation of NPC transplantation therapy.

关键词： neuronal progenitor cells     resveratrol     cerebral ischemia     neuronal differentiation     mitochondrial metabolism     positron emission tomography    

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低蛋白日粮中添加亮氨酸通过雷帕霉素靶蛋白信号通路增加成年大鼠骨骼肌重量及蛋白质合成

张博, 楚丽翠, 刘宏, 谢春元, 谯仕彦, 曾祥芳

《工程（英文）》 2017年 第3卷 第5期   页码 760-765 doi: 10.1016/J.ENG.2017.03.008

摘要：

低蛋白日粮会减少动物组织中蛋白质沉积，影响骨骼肌增重。本文旨在研究低蛋白日粮中添加亮氨酸对成年大鼠骨骼肌重量和蛋白质合成的影响。试验选取36只平均体重为（214.4 ± 2.4）g的成年SD雄性大鼠，按体重相近原则平均分为3个处理，每个处理12个重复，每个重复1只大鼠。3个处理分别饲喂20%酪蛋白（20%C，CON）、10%酪蛋白 + 丙氨酸（10%C + Ala，R）以及10%酪蛋白 + 亮氨酸（10%C + Leu，RL）日粮，试验期为11 d，其中，10%C + Ala组和10%C + Leu组为等氮日粮组。试验第11天，所有大鼠大剂量一次性腹腔注射L-[ring-2H5]苯丙氨酸注射液，测定血清中的氨基酸含量、比目鱼肌和腓肠肌重量、蛋白质合成速率及mTOR信号通路相关分子的表达。结果表明，在3个处理中，RL组血清亮氨酸含量最高（P < 0.05），而异亮氨酸含量最低（P < 0.05）；CON组的缬氨酸含量低于R和RL组（P < 0.05），但采食量、蛋白质合成速度和4EBP1的磷酸化高于R和RL组（P < 0.05），同时腹脂重量显著下降（P < 0.05）。与R组相比，RL组可以增加腓肠肌重量（P < 0.05），促进S6K1磷酸化（P < 0.05），增加骨骼肌蛋白质合成（P < 0.05）。本文结论如下，在成年大鼠长期采食低蛋白日粮的情况下，日粮中添加亮氨酸可以改善大鼠的生长性能，通过提高mTOR通路中S6K1磷酸化水平，促进大鼠骨骼肌蛋白质合成，抑制蛋白质降解。

关键词： 低蛋白日粮     亮氨酸     生长性能     肌肉重量     蛋白质合成     成年大鼠    

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CD14 expression in lipopolysaccharide signal transduction pathway of alcohol-induced liver disease in rats

Rui ZHU MD , Lin SHEN MD , Jianguo LIU MD , Weili ZHANG MM , Ling YANG MD ,

《医学前沿（英文）》 2009年 第3卷 第3期   页码 363-367 doi: 10.1007/s11684-009-0064-z

摘要： This paper aims to investigate the effects of (枳黄) decoction on CD14 expression in the lipopolysaccharide signal transduction pathway of alcohol-induced liver disease in rats. Seventy-five Wistar rats were randomly divided into three groups. Ethanol (56%, weight/volumn) was intragastrically administrated to 50 rats (14mL/kg body weight per day) for 10 days to establish a model of alcohol-induced liver disease, and 25 of these 50 rats were treated with decoction simultaneously. Liver injury was evaluated by biochemical examination. The plasma content of endotoxin was assayed by biochemistry. The expression of CD14 mRNA and protein in rat liver was measured by reverse transcriptional polymerase chain reaction and immunohistochemistry, respectively. decoction pretreatment significantly protected against acute alcohol-induced liver injury, which was evidenced by the decrease of elevated serum alanine aminotransferase and aspartate aminotransferase. In addition, the level of plasma endotoxin and up-regulation of CD14 was also suppressed by decoction in alcohol-intoxicated rats. decoction can significantly reduce CD14 expression in the lipopolysaccharide signal transduction pathway, which is one of the most important mechanisms of decoction to treat hepatic injury induced by alcohol in rats.

关键词： liver disease     alcohol     Zhihuang decoction     CD14     signal transduction    

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标题 作者 时间 类型 操作

of RNA interference targeting angiotensin 1a receptor on blood pressure and cardiac hypertrophy of rats

ZHANG Jingqun, SUN Honglei, MA Yexin, WANG Daowen

期刊论文

Effect of Feixian Recipe on laminin, collagen I and III in rats with pulmonary fibrosis induced by bleomycin

ZHANG Xiaomei, JIANG Liangduo, ZHANG Wei, WU Jianjun, LU Xiangfeng

期刊论文

Structural shifts in the intestinal microbiota of rats treated with cyclosporine A after orthotropic

Junjun Jia, Xinyao Tian, Jianwen Jiang, Zhigang Ren, Haifeng Lu, Ning He, Haiyang Xie, Lin Zhou, Shusen Zheng

期刊论文

Alleviation of cell damage in experimental ANP in rats by administration of chondroitin-sulfate reduces

HE Zhongye, GUO Renxuan, LI Yang, XIE Chengyao, LIU Nan, SONG Wen

期刊论文

Sensory innervation of the anterior eye segment in rats: a retrograde tracing study

Haixia LIU MD , Zhiwang LI MD , Min YANG MD , Xiang TIAN MS , Chaoying LI PhD , Lei PEI PhD ,

期刊论文

of beta-elemene on the levels of plasma endotoxin, serum TNF-alpha, and hepatic CD14 expression in rats

null

期刊论文

monocarboxylate transporter 1 aggravates white matter injury after experimental subarachnoid hemorrhage in rats

期刊论文

Protective effect of tanshinone II A on signal transduction system protein kinase B in rats with myocardial

Enyuan TU MD, Yongjun PAN MM, Kang ZHENG MM, Zhaohua WANG MD, Qiansheng LIANG MD, Guangtian YANG MD,

期刊论文

A better way to do small-for-size liver transplantation in rats

null

期刊论文

promotes the survival and neuronal differentiation of hypoxia-conditioned neuronal progenitor cells in rats

Yao Yao, Rui Zhou, Rui Bai, Jing Wang, Mengjiao Tu, Jingjing Shi, Xiao He, Jinyun Zhou, Liu Feng, Yuanxue Gao, Fahuan Song, Feng Lan, Xingguo Liu, Mei Tian, Hong Zhang

期刊论文

低蛋白日粮中添加亮氨酸通过雷帕霉素靶蛋白信号通路增加成年大鼠骨骼肌重量及蛋白质合成

张博, 楚丽翠, 刘宏, 谢春元, 谯仕彦, 曾祥芳

期刊论文

CD14 expression in lipopolysaccharide signal transduction pathway of alcohol-induced liver disease in rats

Rui ZHU MD , Lin SHEN MD , Jianguo LIU MD , Weili ZHANG MM , Ling YANG MD ,

期刊论文