Effect of electro-acupuncture on basic fibroblast growth factor protein and mRNA expression in hippocampal dentate gyrus of spleen deficiency rats

BACKGROUND： Spleen deficiency in traditional Chinese medicine refers to the functional disorder of spleen, pancreas, intestines, and nervous system in modern medicine. OBJECTIVE; To test whether electro-acupuncture could alter basic fibroblast growth factor （bFGF） protein and mRNA expression in the hippocampal dentate gyrus of spleen deficiency rats. DESIGN, TIME AND SETTING： The randomized, controlled, in vivo animal experiment was performed at the National LeveI-B Laboratory of Clinical Cell Molecule and Biology in Shenzhen Hospital of Traditional Chinese Medicine, between March and November in 2008. MATERIALS： Reserpine injection was produced by Guangdong Bangmin Pharmaceutical Co. Rhubarb extract granule preparation was produced by Guangdong Yifang Pharmaceutical. Huanqiu Brand sterile acupuncture pin was provided by Suzhou Acupuncture Supplies, China. Huatuo Brand electroacupuncture instrument （type SDZ-II） was purchased from Suzhou Medical Appliance Factory, China. METHODS： A total of 96 male Sprague Dawley rats were randomly assigned to control （n = 32） and induction （n = 64） groups. Spleen deficiency was induced via intraperitoneal injection of reserpine and intragastric administration of rhubarb. The successful models were randomized into two groups： model and electro-acupuncture, with 32 rats in each group. Electro-acupuncture was administered at Zusanfi （ST 36） and Sanyinjiao （SP 6） acupoints using a condensation wave and rarefaction （condensation wave 15 Hz） at a strength of 6-15 V for 20 minutes, once per day. The appearance of a slight shiver in the corresponding locus was taken as the standard. According to electro- acupuncture time points, each group was assigned to four subgroups at 7, 14, 28, and 49 days, respectively, with eight rats in each subgroup. Immunohistochemical staining, image analysis, and reverse-transcription polymerase chain reaction were performed at different time points. MAIN OUTCOME MEASURES： bFGF protein and mRNA expression in the hippocampal dentate gyrus of spleen deficiency rats. RESULTS： After 7 days of electro-acupuncture therapy, bFGF protein and mRNA expression significantly increased compared with the model and control groups （P 〈 0.05）. After 14 days, bFGF protein and mRNA expression decreased until 28 days, where levels were then equal to the model group and greater than the control group （P 〈 0.05）. After 49 days, the above indices remained increased in the electro-acupuncture group compared to the model and control groups （P 〈 0.05）. CONCLUSION： Continuous electro-acupuncture maintained a high level of bFGF protein and mRNA expression in the hippocampal dentate gyrus of spleen deficiency rats.

Expression of Vascular Endothelial Growth Factor in Bone Morphogenetic Protein-2 Induced Osteogenesis

An experimental model of femoral muscular pouch in 20 mice was adopted. The expression of VEGF was examined by in situ hybridization method and immunohistochemical method in bone morphogenetic protein- 2 induced osteogenesis . The experimental results demonstrated that the expression signals of VEGF mRNA and VEGF appeared in cytoplasm during condensation of mesenehymal cell. As the mesenchymal cells differentiated into precartilage, the expression signals decreased in mesenehymal cells, but increased in chondrocytes and kept getting denser in the process of cartilage maturity. The peak expression of VEGF mRNA and VEGF in the experimental group appeared on the 14 th day, accompanied by numerons hypertrophic chondrocytes. When mature cartilage calcified and neu, bone trabecula formed, the expression of VEGF mRNA and VEGF decreased in chondrocytes, but still expressed moderately in the osteoblasts and osteocytes. Signals of VEGF mRNA and VEGF can not be detected in the control groups.

Phosphatase and tensin homology deleted in chromosome 10,hypoxia-inducible factor-1 alpha gene expression in colorectal adenoma and adenocarcinoma and their relation to vascular endothelial growth factor protein expression

To examine phosphatase and tensin homology deleted in chromosome 10 (PTEN),hypoxia-inducible factor-1 alpha (HIF-1 alpha) gene expressions and their relation to vascular endothelial growth factor(VEGF) protein expression in the patients with human colorectal adenomas and adenocarcinomas.Methods The expression of PTEN,HIF-1 alpha gene was detected by using in situ hybridization,and the VEGF expression levels by immunohistochemistry in colorectal adenomas and primary colorectal adenocarcinoma.Results Strong expression of HIF-1 alpha was detectable in the majority of colorectal dadenocarcinoma,particularly surrounding areas of necrosis in adenocarcinoma.PTEN,HIF-1 alpha mRNA and VEGF protein were positive in 51.6%,67.7% and 59.7% respectively in 62 cases of adenocarcinomas,and 77.8%,44.4% and 33.3% respectively in 18 cases of adenomas.The positive rate of VEGF was higher in the patients with colorectal adenocarcinomas than that in those with adenomas,whereas that of PTEN mRNA was contrary.HIF-1 mRNA expression was correlated significantly with lymph node metastasis,liver metastasis,Duke’s stage and recurrence.During colorectal tumor progression,the expression of HIF-1 alpha mRNA was positively correlated with the VEGF protein expression (χ2= 4.751 ,P<0.05),but negatively with the PTEN mRNA expression(χ2=21.84,P<0.01).Conclusion The absence or low expression of PTEN and the increased levels of HIF-1α and VEGF may paly an important role in carcinogenesis and progression of colorectal carcinoma.These results suggest that VEGF upregulated by HIF-1 alpha gene may be involved in angiogenesis of colorectal adenocarcinoma.4 refs,1 tab.

Beta-nerve growth factor promotes neurogenesis and angiogenesis during the repair of bone defects

We previously showed that the repair of bone defects is regulated by neural and vascular signals. In the present study, we examined the effect of topically applied β-nerve growth factor（β-NGF） on neurogenesis and angiogenesis in critical-sized bone defects filled with collagen bone substitute. We created two symmetrical defects, 2.5 mm in diameter, on either side of the parietal bone of the skull, and filled them with bone substitute. Subcutaneously implanted osmotic pumps were used to infuse 10 μgβ-NGF in PBS（β-NGF ＋ PBS） into the right-hand side defect, and PBS into the left（control） defect, over the 7 days following surgery. Immunohistochemical staining and hematoxylin-eosin staining were carried out at 3, 7, 14, 21 and 28 days postoperatively. On day 7, expression of β III-tubulin was lower on the β-NGF ＋ PBS side than on the control side, and that of neurofilament 160 was greater. On day 14, β III-tubulin and protein gene product 9.5 were greater on the β-NGF ＋ PBS side than on the control side. Vascular endothelial growth factor expression was greater on the experimental side than the control side at 7 days, and vascular endothelial growth factor receptor 2 expression was elevated on days 14 and 21, but lower than control levels on day 28. However, no difference in the number of blood vessels was observed between sides. Our results indicate that topical application of β-NGF promoted neurogenesis, and may modulate angiogenesis by promoting nerve regeneration in collagen bone substitute-filled defects.

Aberrant expression of genes and proteins in pterygium and their implications in the pathogenesis

Pterygium is a common ocular surface disease induced by a variety of factors. The exact pathogenesis of pterygium remains unclear. Numbers of genes and proteins are discovered in pterygium and they function differently in the occurrence and development of this disease. We searched the Web of Science and PubMed throughout history for literatures about the subject. The keywords we used contain pterygium, gene, protein, angiogenesis, fibrosis, proliferation, inflammation, pathogenesis and therapy. In this review, we summarize the aberrant expression of a range of genes and proteins in pterygium compared with normal conjunctiva or cornea, including growth factors, matrix metalloproteinases and tissue inhibitors of mefalloproteinases, interleukins, tumor suppressor genes, proliferation related proteins, apoptosis related proteins, cell adhesion molecules, extracellular matrix proteins, heat shock proteins and tight junction proteins. We illustrate their possible mechanisms in the pathogenesis of pterygium as well as the related intervention based on them for pterygium therapy.

Expression of vascular endothelial growth factor and its role in oncogenesis of human gastric carcinoma

AIM To establish the role of vascular endothelial growth factor (VEGF) in the oncogenesisof human gastric carcinoma more directly.METHODS The expression of VEGF and its receptor kinase-domain insert containing receptor (KDR) in human gastric cancer tissue were observed by immunohistochemical staining. VEGF levels were manipulated in human gastric cancer cell using eukaryotic expression constructs designed to express the complete VEGF165 complimentary DNA in either the sense or antisense orientation. The biological changes of the cells were observed in which VEGF was up-regulated or downregulated.RESULTS VEGF-positive rate was 50%, and VEGF was mainly localized in the cytoplasm and membrane of the tumor cells, while KDR was mainly located in the membrane of vascular endothelial cells in gastric cancer tissues and peri-cancerous tissue. In 2 cases of 50 specimens, the gastric cancer cells expressed KDR,localized in both the cytoplasm and membrane.Introduction of VEGF165 antisense into human gastric cancer cells ( SGC-7901, immunofluorescence intensity,31.6%)) resulted in a significant reduction in VEGFspecific messenger RNA and total and cell surface VEGF protein ( immunofluorescence intensity, 8.9%)(P＜0.05). Conversely, stable integration of VEGF165 in the sense orientation resulted in an increase in cellular and cell surface VEGF (immunofluorescence intensity,75.4%) (P＜0.05). Lowered VEGF levels were associated with a marked decrease in the growth of nude mouse xenografted tumor (at 33 days postimplantation, tomor volume: 345.40 ± 136.31 mm3) (P＜0.05 vs control SGC7901 group: 1534.40 ± 362.88 mm3), whereas up-regulation of VEGF resulted in increased xenografted tumor size (at 33 days postimplantation, tomor volume: 2350.50 ± 637.70mm3) (P＜0.05 vs control SGC-7901 group).CONCLUSION This study provides direct evidence that VEGF plays an important role in the oncogenesis of human gastric cancer.

lncRNA HOXC-AS1和IGF2BP2 mRNA在胃癌组织中的表达及临床意义

目的:探究胃癌(GC)组织中长链非编码RNA HOXC反义RNA1(lncRNA HOXC-AS1)、胰岛素样生长因子2 mRNA结合蛋白2(IGF2BP2)mRNA表达水平与患者临床病理特征及术后5年内生存的关系。方法:选取我院2015年5月至2018年4月收治的GC患者139例,手术收集GC组织及癌旁组织。荧光定量PCR法检测lncRNA HOXC-AS1和IGF2BP2 mRNA表达。对GC患者进行术后随访5年,记录GC患者生存情况,分为生存组88例,死亡组51例。比较GC组织和癌旁组织中lncRNA HOXC-AS1和IGF2BP2 mRNA表达水平、不同临床病理特征患者GC组织中lncRNA HOXC-AS1和IGF2BP2 mRNA表达情况、生存组和死亡组临床病理特征和GC组织中lncRNA HOXC-AS1和IGF2BP2 mRNA表达水平。分析GC组织中lncRNA HOXC-AS1和IGF2BP2 mRNA表达水平的相关性、GC组织中lncRNA HOXC-AS1和IGF2BP2 mRNA表达情况与术后5年生存的关系、影响GC患者术后5年内生存的危险因素。结果:与癌旁组织相比,GC组织中lncRNA HOXC-AS1和IGF2BP2 mRNA表达水平均显著升高(P<0.05);GC组织中lncRNA HOXC-AS1和IGF2BP2 mRNA表达水平呈正相关(P<0.05);GC组织中lncRNA HOXC-AS1和IGF2BP2 mRNA表达水平与淋巴结转移、TNM分期、肿瘤分化程度相关(P<0.05);lncRNA HOXC-AS1高表达组、IGF2BP2 mRNA高表达组患者术后5年总生存率分别显著低于lncRNA HOXC-AS1低表达组、IGF2BP2 mRNA低表达组(P<0.05);生存组和死亡组淋巴结转移、TNM分期、肿瘤分化程度比较差异有统计学意义(P<0.05);死亡组患者GC组织中lncRNA HOXC-AS1和IGF2BP2 mRNA表达水平显著高于生存组(P<0.05);TNM分期为III期、肿瘤低分化、lncRNA HOXC-AS1高表达、IGF2BP2 mRNA高表达是影响GC患者术后5年内生存的独立危险因素(P<0.05)。结论:GC患者癌组织中lncRNA HOXC-AS1及IGF2BP2 mRNA表达水平均显著升高,且术后5年内死亡的GC患者较存活患者更高,二者与淋巴结转移、TNM分期、肿瘤分化程度密切相关,二者高表达是影响GC患者术后5年内生存的独立危险因素。

Expression of vascular endothelial growth fac-tor gene in primary cultured rat hepatocytes

BACKGROUND: It is the key point for vascular endothelialgrowth factor (VEGF121) gene related therapy as to how totransfect and express the gene safely, effectively and repeat-edly. This study was designed to investigate the VEGF121transfection and expression in primary cultured rat hepato-cyte.METHODS: After construction of vector internal ribosomeentry site-enhanced yellow fluorescent protein (pIRES-EY-FP)/VEGF121, the transfection and expression of the exoge-nous VEGF121 gene in primary cultured rat hepatocyteswere observed through RT-PCR, Western blot and fluores-cent microscopy.RESULTS: pIRES-EYFP/VEGF121 plasmid was construct-ed and transfected successfully into primary cultured rathepatocytes, the transfection and expression of gene in pri-mary cultured rat hepatocytes were examined by RT-PCRand Western blot, and yellow-green fluorescence was ob-served through a fluorescent microscope.CONCLUSION: The successful transfection and expressionof plasmid pIRES-EYFP/VEGF121 in primary cultured rathepatocytes provides a foundation for hepatocyte transplan-tation and gene therapy after modification of hepatocytesby the gene.

Correlation of human epidermal growth factor receptor 2 expression with clinicopathological characteristics and prognosis in gastric cancer

AIM:To investigate human epidermal growth factor receptor 2(HER2) gene amplification and protein expression in Chinese patients with resectable gastric cancer and the association with clinicopathological characteristics and survival.METHODS:One hundred and ninety-seven gastric cancer patients who underwent curative surgery procedures were enrolled into this study.HER2 gene amplification and protein expression were examined using fluorescence in-situ hybridization(FISH) and immunohistochemistry(IHC) analysis on formalin-fixed paraffinembedded gastric cancer samples from all patients.For scoring,Hofmann's HER2 gastric cancer scoring system was adopted.All cases showing IHC3+ or FISH positiv-ity were defined as HER2 positive.Patient clinicopathological data and survival information were collected.Finally,χ 2 statistical analysis was performed to analyze the HER2 positivity rate amongst the subgroups with different clinicopathological characteristics including;gender,age,tumor location,Lauren classification,differentiation,TNM staging,depth of invasion,lymph node metastases and distant metastasis.The probability of survival for different subgroups with different clinicopathological characteristics was calculated using the Kaplan-Meier method and survival curves plotted using log rank inspection.RESULTS:According to Hofmann's HER2 gastric cancer scoring criteria,31 cases(15.74%) were identified as HER2 gene amplified and 19 cases(9.64%) were scored as strongly positive for HER2 membrane staining(3+),25 cases(12.69%) were moderately positive(2+) and 153 cases(77.66%) were HER2 negative(0/1+).The concordance rate between IHC and FISH analyses was 88.83%(175/197).Thirty-six cases were defined as positive for HER2 gene amplification and/or protein expression,with 24 of these cases being eligible for Herceptin treatment according to United States recommendations,and 29 of these cases eligible according to EU recommendations.Highly consistent results were detected between IHC3+,IHC0/1 and FISH(73.68% and 95.42%),but low consistency was observed between IHC2+ and FISH(40.00%).The positivity rates in intestinal type and well-differentiated gastric cancer were higher than those in diffuse/mixed type and poorly-differentiated gastric cancer respectively(28.57% vs 13.43%,P = 0.0103;37.25% vs 11.64%,P < 0.0001),but were not correlated with gender,age,tumor location or TNM stage,depth of invasion,lymph node metastases and distant metastasis.In poorly-differentiated gastric cancer patients,those without lymph node metastasis showed a higher HER2 positivity rate than those with lymph node metastasis(26.47% vs 7.14%,P = 0.0021).This association was not present in thosepatients with well-differentiated gastric cancer(28.57% vs 43.33%,P = 0.2832).Within our patient cohort,26 cases were lost to follow-up.The median survival time for the remaining 171 patients was 18 mo.The median survival times of the HER2 positive and negative groups were 17 and 18.5 mo respectively.Overall survival was not significantly different between HER2-positive and negative groups(χ 2 = 0.9157,P = 0.3386),but in patients presenting well-differentiated tumors,the overall survival of the HER2-positive group was significantly worse than that of the HER2-negative group(P = 0.0123).In contrast,patients with poorly differentiated and diffuse/mixed subtype gastric cancers showed no significant differences in overall survival associated with HER2.Furthermore,the median survival time of the HER2 positive group did not show any statistically significant differences when compared to the subgroups of gender,age,tumor location,TNM classification,lymph node metastases and distant metastasis.CONCLUSION:Patients with intestinal type gastric cancer(GC),well-differentiated GC and poorly-differentiated GC without lymph node metastasis,may all represent suitable candidates for targeted therapy using Herceptin.

Bioinformatic identification of key candidate genes and pathways in axon regeneration after spinal cord injury in zebrafish

Zebrafish and human genomes are highly homologous;however,despite this genomic similarity,adult zebrafish can achieve neuronal proliferation,regeneration and functional restoration within 6–8 weeks after spinal cord injury,whereas humans cannot.To analyze differentially expressed zebrafish genes between axon-regenerated neurons and axon-non-regenerated neurons after spinal cord injury,and to explore the key genes and pathways of axonal regeneration after spinal cord injury,microarray GSE56842 was analyzed using the online tool,GEO2R,in the Gene Expression Omnibus database.Gene ontology and protein-protein interaction networks were used to analyze the identified differentially expressed genes.Finally,we screened for genes and pathways that may play a role in spinal cord injury repair in zebrafish and mammals.A total of 636 differentially expressed genes were obtained,including 255 up-regulated and 381 down-regulated differentially expressed genes in axon-regenerated neurons.Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment results were also obtained.A protein-protein interaction network contained 480 node genes and 1976 node connections.We also obtained the 10 hub genes with the highest correlation and the two modules with the highest score.The results showed that spectrin may promote axonal regeneration after spinal cord injury in zebrafish.Transforming growth factor beta signaling may inhibit repair after spinal cord injury in zebrafish.Focal adhesion or tight junctions may play an important role in the migration and proliferation of some cells,such as Schwann cells or neural progenitor cells,after spinal cord injury in zebrafish.Bioinformatic analysis identified key candidate genes and pathways in axonal regeneration after spinal cord injury in zebrafish,providing targets for treatment of spinal cord injury in mammals.

基于lncRNA/mRNA表达谱探讨百事乐胶囊调控慢性应激抑郁症模型大鼠海马损伤的机制

目的基于长链非编码RNA(lncRNA)/信使RNA(mRNA)表达谱探讨百事乐胶囊(贯叶金丝桃、人参、姜黄)调控慢性应激抑郁症模型大鼠海马损伤的可能机制。方法将SD大鼠随机分为空白组、模型组及百事乐胶囊高、低剂量组(2.88、0.72 g·kg^(-1)),每组8只;采用28 d慢性温和不可预测性应激联合孤养的方式构建抑郁症大鼠模型,造模同时灌胃给药,每日1次。采用开野试验和新奇摄食试验评价大鼠模型的抑郁样行为;采用ELISA法检测血清中肿瘤坏死因子α(TNF-α)、白细胞介素6(IL-6)的水平;采用高通量芯片测序筛选出组间差异的海马组织lncRNA/mRNA表达谱,预测差异表达的lncRNA靶基因,并取lncRNA、mRNA的差异共集基因;对差异共集基因进行GO功能富集分析和KEGG通路富集分析;采用Western Blot法验证差异性蛋白胰岛素生长因子2(Igf2)、核糖体蛋白L36(Rpl36)的表达情况。结果(1)与空白组比较,模型组大鼠4 min内的水平、垂直活动量均显著降低(P<0.01),摄食潜伏期显著延长(P<0.01),血清TNF-α、IL-6水平显著升高(P<0.01)。与模型组比较,百事乐胶囊高剂量组大鼠的水平、垂直活动量明显增加(P<0.05,P<0.01),摄食潜伏期显著缩短(P<0.01),血清TNF-α、IL-6水平明显降低(P<0.05,P<0.01)。(2)模型组与空白组比较,差异共集基因有152个,其中上调100个,下调52个;百事乐胶囊高剂量组与模型组比较,差异共集基因有150个,其中上调88个,下调62个;百事乐胶囊低剂量组与模型组比较,差异共集基因有119个,其中上调58个,下调61个。Igf2、Rpl36为百事乐胶囊高剂量组的主要逆向调节基因。百事乐胶囊主要调控与生物学过程(突触化学传递)和细胞组分(细胞连接)密切相关的差异共集基因的表达,可能通过影响MAPK信号转导通路、胰岛素信号改善抑郁症模型大鼠的海马损伤。(3)与空白组比较,模型组大鼠海马组织Igf2、Rpl36蛋白表达显著下调(P<0.01)。与模型组比较,百事乐胶囊高剂量组大鼠海马组织Igf2、Rpl36蛋白表达显著上调(P<0.01)。结论百事乐胶囊可能通过影响差异共集基因Igf2介导的MAPK信号途径和胰岛素信号途径,调控神经元的存活及突触可塑性,以及可能通过Rpl36减少神经元凋亡,从而发挥抗抑郁作用。

SIRT1 and stem cells: In the forefront with cardiovascular disease, neurodegeneration and cancer

Cardiovascular disease, nervous system disorders, and cancer in association with other diseases such as diabetes mellitus result in greater than sixty percent of the global annual deaths. These noncommunicable diseases also affect at least one-third of the population in low and middle-income countries and lead to hypertension, elevated cholesterol, malignancy, and neurodegenerative disorders such as Alzheimer's disease and stroke. With the climbing lifespan of the world's population, increased prevalence of these disorders is expected requiring the development of new therapeutic strategies against these disabling disease entities. Targeting stem cellproliferation for cardiac disease, vascular disorders, cancer, and neurodegenerative disorders is receiving great enthusiasm, especially those that focus upon SIRT1, a mammalian homologue of the yeast silent information regulator-2. Modulation of the cellular activity of SIRT1 can involve oversight by nicotinamide/nicotinic acid mononucleotide adenylyltransferase, mammalian forkhead transcription factors, mechanistic of rapamycin pathways, and cysteine-rich protein 61, connective tissue growth factor, and nephroblastoma over-expressed gene family members that can impact cytoprotective outcomes. Ultimately, the ability of SIRT1 to control the programmed cell death pathways of apoptosis and autophagy can determine not only cardiac, vascular, and neuronal stem cell development and longevity, but also the onset of tumorigenesis and the resistance against chemotherapy. SIRT1 therefore has a critical role and holds exciting prospects for new therapeutic strategies that can offer reparative processes for cardiac, vascular, and nervous system degenerative disorders as well as targeted control of aberrant cell growth during cancer.

The involvement of p38 MAPK in transforming growth factor β1-induced apoptosis in murine hepatocytes

We reported in this manuscript that TGF-β1 induces apoptosis in AML12 murine hepatocytes, which is associated with the activation of p38 MAPK signaling pathway. SB202190, a specific inhibitor of p38 MAPK, strongly inhibited the TGF-β1-induced apoptosis and PAI-1 promoter activity. Treatment of cells with TGF-β1 activates p38. Furthermore, over-expression of dominant negative mutant p38 also reduced the TGF-β1-induced apoptosis. The data indicate that the activation of p38 is involved in TGF-β1-mediated gene expression and apoptosis.

生长激素和胰岛素样生长因子Ⅰ对奶牛乳蛋白合成关键激酶及调节因子mRNA表达量的影响

本试验旨在探讨生长激素(GH)和胰岛素样生长因子Ⅰ(IGF-Ⅰ)对体外培养的奶牛乳腺上皮细胞内调控乳蛋白合成的关键激酶及调节因子mRNA表达量的影响。试验对纯化后的荷斯坦奶牛乳腺上皮细胞进行4种处理,对照组采用无血清生长培养基,试验组在对照组的基础上分别添加GH(100 ng/mL)、IGF-Ⅰ(100 ng/mL)和GH(100 ng/mL)+IGF-Ⅰ(100 ng/mL)。培养24 h后,采用实时定量PCR(RT-qPCR)法测定κ-酪蛋白基因以及调控乳蛋白合成的关键激酶及调节因子的mRNA表达量,并测定生长激素受体(GHR)和胰岛素样生长因子Ⅰ受体(IGF-ⅠR)mRNA表达量。结果表明:体外培养的奶牛乳腺上皮细胞可以表达GHR和IGF-ⅠRmRNA,各试验组均能显著提高κ-酪蛋白(CSN3)mRNA表达量(P<0.05),但未发现GH和IGF-Ⅰ复合存在累积效应;与对照组相比,GH组有提高E74-样转录因子5(ELF5)mRNA表达量的趋势(P<0.10),而IGF-Ⅰ组显著提高了哺乳动物雷帕霉素靶蛋白(mTOR)和核糖体蛋白S6激酶1(rpS6K1)mRNA表达量(P<0.05),GH+IGF-Ⅰ组未呈现加强作用。结果提示,GH和IGF-Ⅰ可能单独通过影响调控乳蛋白合成的关键激酶及调节因子mRNA表达来调节κ-酪蛋白的合成。

不同发育阶段绒山羊皮肤中FGF5基因mRNA表达的RT-PCR检测

为深入研究成纤维细胞生长因子5对毛囊生长发育的生物学功能提供理论依据。在10月左右和1月左右,即皮肤毛囊处于生长旺期和退行期时采集了12只内蒙古阿尔巴斯白绒山羊皮样,利用TRIZOL试剂盒提取皮肤总RNA(一步法),利用RT-PCR方法检测FGF5基因在绒山羊绒毛周期性生长不同阶段皮肤中的表达分布情况,试验结果表明,FGF5基因mRNA在绒山羊毛囊生长旺期和退行期均有表达,却只得到了一种剪切形式的表达,经测序是长片段,而缺失外显子2的短片段形式没有检测到。

Cloning and Sequence Analysis of IGFBP-1 Gene in Sheep

In this study, using Liangshan semi-fine wool sheep as an experimental material, full-length CDS sequence of IGFBP-1 gene was cloned with RT-PCR method and analyzed with bioinformatics methods. The results showed that the full-length CDS sequence of IGFBP-1 gene in Liangshan semi-fine wool sheep was 792 bp in length, encoding 263 amino acids. The CDS sequence shared 97%, 76% and 74% homology with bovine, human and rat, respectively; the amino acid sequence shared 97% , 69% and 71%, respectively. The GenBank accession number was FJ589639.1. The amino acid molecular weight of IGFBP-1 was 27.8 kD, and the theoretical isoelectric point （pl） was 5.99. The result of phylogenetic analysis showed that IGFBP-1 gene in Liangshan semi-fine wool sheep exhibited close phylogenetic relationships with bovine, goat and other mammals, and distant phylogenetic relationships with chicken and fish. IGFBP-1 gene had obvious hy- drophobic and hydrophilic regions, harboring one signal peptide, one transmembrane region, 16 phosphorylation sites, six N-glycesylation sites and eight O-glycosy- lation sites. The result of secondary structure analysis showed that the random coil, a-helix and 13-sheet regions accounted for 61.98%, 24.33% and 13.69%, re- spectively. The result of tertiary structure analysis showed that IGFBP-1 harbors an IGFBP_N domain and a thyrnglobulin type-1 domain. This study laid a solid foundation for further investigating the function of IGFBP-1 gene in sheep.

Cloning and Sequence Analysis of IGFBP-7 Gene in Sheep

In this study, full-length CDS sequence of IGFBP-7 gene was cloned from Liangshan semi-fine wool sheep with RT-PCR method and analyzed with bioinformatics methods. The results showed that the full-length CDS sequence of IGFBP-7 gene in Liangshan semi-fine wool sheep was 846 bp in length, encoding 282 amino acids. The CDS sequence shared 99%, 95% and 90% homology with bovine, human and rat, respectively; the amino acid sequence shared 98%, 93% and 89%, respectively. The GenBank accession number was FJ589640.1. The amino acid molecular weight of IGFBP-7 was 29.0 kD, and the theoretical isoelec- tric point （pl） was 8.25. The result of phylogenetic analysis showed that IGFBP-7 gone in Liangshan semi-fine wool sheep exhibited close phylogenetic relationships with bovine, goat and other mammals, and distant phylogenetic relationships with Danio rerio and Haliotis diversicolor. IGFBP-7 gene had uniformly distributed hy- drophobic and hydrophilic regions, harboring one signal peptide, two transmembrane regions, 16 phosphorylation sites, four N-glycosylation sites and one O-glyco- sylation site. The result of secondary structure analysis showed that the random coil, or-helix and β-sheet regions accounted for 64.89%, 19.86% and 15.25%, respectively. The result of tertiary structure analysis showed that IGFBP-7 harbors an IGFBP_N domain and an Ig-like domain. This study provided scientific basis for further investigating the function of IGFBP-7 gene in sheep.

Construction of the Eukaryotic Expression Vector with EGFP and hVE GF121 Gene and its Expression in Rat Mesenchymal Stem Cells

Objectives To construct a recombinant plasmid carrying enhanced green fluore- scent protein (EGFP) and human vascular endothelial growth factor (VEGF) 121 gene and detect its expre- ssion in rat mesenchymal stem cells (MSCs). Methods Human VEGF121 cDNA was amplified with polymerase chain reaction (PCR) from pCD/hVEGF121 and was inserted into the eukaryotic expression vector pEGFP- C1. After being identified with PCR, double enzyme digestion and DNA sequencing. The recombinant plasmid pEGFP/hVEGF121 was transferred into rat MSCs with lipofectamine. The expression of EGFP/VEGF121 fusion protein were detected with fluorescence microscope and immunocytochemical staining respectively. Results The recombinant plasmid was confirmed with PCR, double enzyme digestion and DNA sequencing. The fluoresce- nce microscope and immunocytochemical staining results showed that the EGFP and VEGF121 protein were expressed in MSCs 48 h after transfection. Conclusions The recombinant plasmid carrying EGFP and human VEGF was successfully constructed and expressed positively in rat MSCs. It offers a promise tool for further research on differentiation of MSCs and VEGF gene therapy for ischemial cardiovascular disease.

胰岛素样生长因子2 mRNA结合蛋白3在CIN及宫颈癌患者中的表达及其在宫颈病变筛查中的意义

目的分析宫颈上皮内瘤变(CIN)和宫颈癌患者胰岛素样生长因子2 mRNA结合蛋白3(IMP3)的表达情况及其在宫颈病变筛查中的意义。方法采用回顾性研究,收延安市宝塔区人民医院120例患者的宫颈组织标本,包括慢性宫颈炎18例,CINⅠ级31例,CINⅡ级20例,CINⅢ级24例,宫颈癌27例。以CIN I为低度鳞状上皮内病变(LSIL)组,CINⅡ、CINⅢ为高度鳞状上皮内病变(HSIL)组。检测低危型人乳头状瘤病毒(LR-HPV)与高危型人乳头状瘤病毒(HR-HPV)分型,通过免疫组织化学法检测宫颈组织中IMP3蛋白表达水平。结果 120例患者中,LR-HPV与HR-HPV检出率分别为4. 17%(5/120)、68. 33%(82/120)。慢性宫颈炎组、LSIL组、HSIL组、宫颈癌组HR-HPV检出率逐渐增高,其中LSIL组、HSIL组、宫颈癌组HR-HPV检出率均显著高于慢性宫颈炎组(P <0. 01),而HSIL组与LSIL组、宫颈癌组HR-HPV检出率的比较,差异均无统计学意义(P> 0. 05)。120例患者中,IMP3蛋白表达阳性率为69. 17%(83/120)。LSIL组IMP3阳性率明显高于慢性宫颈炎组,宫颈癌组和HSIL组IMP3阳性率均明显高于LSIL组和慢性宫颈炎组(P <0. 05);宫颈癌组与HSIL组IMP3阳性率比较,无显著差异(P> 0. 05)。LR-HPV感染与IMP3阳性表达无密切关系(P>0. 05);HR-HPV感染与IMP3带状表达具有正相关关系(P <0. 05),而与IMP3阴性表达、点状表达均无密切相关性(P>0. 05)。结论随着宫颈病变程度的增高,IMP3蛋白表达阳性率亦随之升高,提示其对宫颈病变进展情况具有一定的预测价值,且IMP3带状表达与HR-HPV感染的发生密切相关,因此二者联合检测可作为临床早期筛查宫颈病变的一种可行方法。