根皮苷对血吸虫病肝纤维化小鼠肝脏中TGF-β1和PDGF-BB表达的影响

目的 探讨根皮苷对血吸虫病肝纤维化小鼠肝组织中转化生长因子β1(TGF-β1)和人血小板衍生生长因子BB(PDGF-BB)表达的影响.方法 用腹部贴片法感染昆明小鼠,建立血吸虫病肝纤维化模型,第6周末,肝纤维化模型建立;用吡喹酮杀虫两天后,用低、中、高剂量根皮苷(10、20、40 mg·kg-1·d-1)治疗,同时设病理模型组、空白对照和阳性对照(INF-γ)组;给药8周后,采用免疫组织化学检测各组大鼠肝脏组织中TGF-β1和PDGF-BB的表达,做HE染色测量血吸虫的虫卵结节.结果 TGF-β1和PDGF-BB含量在用药第4周到第8周呈降低趋势,且高剂量根皮苷组的各项指标最接近空白组,抑制血吸虫病肝纤维化作用明显;HE染色显示高剂量根皮苷组的肝脏变性坏死减轻明显,小叶结构完整;高剂量根皮苷组的TGF-β1和PDGF-BB含量与模型组、吡喹酮组、低剂量根皮苷组和中剂量根皮苷组的都有显著性差异(P＜0.01);与IFN-γ组比较无显著性差异(P＞0.05);根皮苷各剂量组和IFN-γ组的计分较模型组显著降低(P＜0.01),根皮苷低、中量组的计分与IFN-γ组的比较有显著性差异(P＜0.05),根皮苷各剂量组之间比较有显著性差异(P＜0.05).结果表明:根皮苷剂量呈量效增强关系.结论 根皮苷能降低血吸虫病肝纤维化小鼠肝脏中TGF-β1和PDGF-BB的表达,使血吸虫虫卵结节减小,使血吸虫病肝纤维化程度减轻.     

三橘荔核汤对CAP/CPPS患者前列腺液MCP-1、PDGF-BB表达的影响

目的:观察三橘荔核汤对CAP/CPPS患者前列腺液MCP-1、PDGF-BB表达的影响。方法:将符合CAP/CPPS(气滞血瘀型)诊断标准的患者70例随机分为治疗组和对照组各35例,治疗组采用三橘荔核汤口服,对照组采用前列腺汤口服,均以10 d为1个疗程,共3个疗程。观察两组患者临床疗效、NIH-CPSI积分及前列腺液中细胞因子MCP-1、PDGF-BB水平的变化。结果:两组治疗后综合疗效比较,差异有统计学意义(P0.05);NIH-CPSI积分比较,差异有统计学意义(P0.05);MCP-1、PDGF-BB的表达,差异均有统计学意义(P0.05)。结论:三橘荔核汤治疗CAP/CPPS患者临床疗效显著,其作用机理可能是通过调控炎症因子MCP-1、PDGF-BB的表达从而达到免疫调节作用。     

ADR肾病大鼠肾组织中PDGF-BB表达及活血化瘀中药干预的实验研究

目的:通过观察PDGF-BB在阿霉素肾病(AIN)大鼠肾组织的表达及活血化瘀中药对其表达的影响,探讨活血化瘀中药对在阿霉素肾病(AIN)大鼠肾小管间质保护作用的机理,为临床早期防治肾小管间质纤维化提供实验依据。方法:SPF级雄性SD大鼠55只,体重250±20g,随机分为4组。正常对照组12只、模型对照组13只、活血化瘀组15只、补益气阴组15只。除正常组外,其余各组均采用阿霉素(ADR)6.5mg/kg一次性尾静脉注射,建立阿霉素肾病模型,正常对照组予等量生理盐水自尾静脉注射。造模当天开始治疗,补益气阴和活血化瘀中药组每日两次经胃灌服中药汤剂治疗,连续治疗8周。观察实验大鼠的一般情况。造模后第1、2、8周留取尿标本,于实验结束留取血检测谷丙转氨酶(ALT)、白蛋白(ALB)、血尿素氮(BUN)、血肌酐(Scr)水平;在实验结束时宰杀大鼠,取左肾用免疫组化测定大鼠肾组织中PDGF-BB蛋白的表达和RT-PCR半定量法测大鼠肾组织中PDGF-BBmRNA表达;取肾组织以光镜HE染色检测肾小管病理学改变。结果:(1)阿霉素肾病大鼠8周左右尿蛋白排泄达到高峰;(2)各中药治疗组较模型组均能减缓尿蛋白排泄的增长速度;(3)模型对照组在实验结束后免疫组化及RT-PCR观察PDGF-BB蛋白和mRNA表达情况与正常对照组比较明显上调(P0.05);各中药治疗组与模型对照组比较,中药治疗组能下调PDGF-BB,而活血化瘀组效果更明显。结论:(1)实验后2周各造模组大鼠蛋白定量均大于100mg/24h模型制作成功;(2)阿霉素肾病大鼠肾组织尤其肾小管上皮细胞PDGF-BB蛋白和mRNA表达增强,与肾病的进展一致;(3)活血化瘀中药对阿霉素肾病大鼠有减缓蛋白尿增长速度,减轻肾病理损害,尤其减少肾小官萎缩及间质纤维化,保护肾功能;(4)活血化瘀中药还可以明显抑制PDGF-BB蛋白和mRNA在肾组织中的表达,对阿霉素肾病大鼠肾小管间质纤维化具有早期防治作用。     

姜黄素对肝纤维化模型大鼠肝组织PDGF-BB、CTGF的影响

目的:研究姜黄素对肝脏血小板衍生因子-BB(PDGF-BB)、结缔组织生长因子(CTGF)表达的影响,探讨其抗肝纤维化的作用机制。方法:采用CCl4皮下注射复制肝纤维化大鼠模型。实验分为正常对照(等容生理盐水)、模型(等容生理盐水)、姜黄素(200mg·kg-1)和复方鳖甲软肝片(625mg·kg-1)组,以免疫组化法检测各组大鼠肝组织PDGF-BB、CTGF阳性表达情况。结果:与模型组比较,姜黄素组大鼠肝组织PDGF-BB、CTGF阳性表达显著降低(P<0.05)。结论:姜黄素能够抑制肝组织PDGF-BB、CTGF的生成,从而发挥其抗肝纤维化的作用。     

Down-regulation of microRNA-27b promotes retinal pigment epithelial cell proliferation and migration by targeting Nox2

Aberrant proliferation and migration of retinal pigment epithelium (RPE) cells contributes to the pathology of various ocular diseases. miR-27b has been reported to be crucial in the regulation of cell differentiation, proliferation, apoptosis, and migration. However, the role of miR-27b on RPE proliferation and migration remains largely unknown. Here the effect of miR-27b on ARPE-19 cells under platelet-derived growth factor (PDGF)-BB stimulation was explored. In this study, we found that the expression level of miR-27b was significantly reduced in ARPE-19 cells under PDGF-BB stimulation. Ectopic expression of miR-27b remarkably inhibited PDGF-BB-induced proliferation and migration in ARPE-19 cells. Furthermore, bioinformatic analysis and luciferase reporter assay showed that NADPH oxidase 2 (Nox2) was a direct target for miR-27b, and that knockdown of Nox2 expression mimicked the inhibitory effect of miR-27b on PDGF-BB ?induced proliferation and migration in ARPE-19 cells, whereas, restoration of Nox2 expression showed an opposite effect. In addition, the ROS production and the activation of P13K/AKT/mTOR signaling induced by PDGF-BB were also suppressed by miR-27b overexpression or Nox2 silencing. Thus, these findings indicated that miR-27b exerted its protective role in RPE cells under PDGF-BB stimulation was partially through regulation of Nox2 and its downstream P13K/AKT/mTOR signaling, which might be a potential therapeutic approach for treatment of diseases caused by RPE proliferation, and migration.     

STAT3介导了血小板源性生长因子BB诱导的大鼠血管平滑肌细胞Pim-1表达

 目的： 观察血小板源性生长因子BB(PDGF-BB)是否可以诱导大鼠血管平滑肌细胞（VSMCs）表达Pim-1及Pim-1对VSMCs增殖的影响,探讨STAT3信号分子在这一过程中的作用,为血管重建性疾病（VRD）的研究提供实验依据。方法： 不同浓度PDGF-BB作用不同时间刺激体外培养的VSMCs,用细胞计数法检测增殖;用real-time RT-PCR 检测Pim-1 mRNA表达水平;Western blotting 检测STAT3 的活性变化;用放线菌素D（actinomycin D）、AG490（JAK特异性抑制剂）及siRNA沉默Pim-1和STAT3进行干预。结果： PDGF-BB（20 μg/L）作用VSMCs 24 h,可以诱导细胞增殖,Pim-1沉默抑制了这一过程;正常未经处理的VSMCs Pim-1 mRNA表达量较低,不同浓度PDGF-BB（10 μg/L~50 μg/L ）作用VSMCs 1 h,Pim-1 mRNA表达明显增加,其中以20 μg/L最显著;用PDGF-BB（20 μg/L）作用VSMCs 不同时间（0.5 h~4 h）,可显著上调Pim-1 mRNA表达,以0.5 h最显著。用actinomycin D及AG490预处理后Pim-1 mRNA表达随之降低。PDGF-BB可激活VSMCs中磷酸化STAT3水平,AG490和转染STAT3-siRNA可抑制 STAT3的磷酸化以及相应的Pim-1 mRNA表达。结论： PDGF-BB可通过Pim-1调节VSMCs增殖;STAT3可能参与了PDGF-BB诱导的VSMCs Pim-1表达。     

PDGF-BB 在乳腺浸润性导管癌中的表达及其临床意义

目的:探讨PDGF-BB在乳腺浸润性导管癌中的表达及其与临床病理特征之间的关系。方法:收集2015年6月至2017年8月新疆医科大学第一附属医院经病理证实的乳腺浸润性导管癌80例,采用免疫组化方法检测癌组织及癌旁组织PDGF-BB表达状况,并分析其与临床病理特征关系。结果:乳腺浸润性导管癌组织中PDGF-BB表达明显高于癌旁组织（57.50% vs 13.75%,P<0.05）;PDGF-BB表达与淋巴结转移（P<0.05）和较高的pTNM分期有关（P<0.05）;而与年龄、月经状态、肿瘤直径、PR、ER、HER-2、有无术后复发转移等临床病理特征无关（P>0.05）。结论:PDGF-BB在乳腺浸润性导管癌的发生及进展中起重要作用,其预后价值仍需进一步评价。     

Platelet-rich plasma with keratinocytes and fibroblasts enhance healing of full-thickness wounds

Advances in tissue engineering led to the development of various tissue-engineered skin substitutes (TESS) for the treatment of skin injuries. The majority of the autologous TESS required lengthy and costly cell expansion process to fabricate. In this study, we determine the possibility of using a low density of human skin cells suspended in platelet-rich plasma (PRP)-enriched medium to promote the healing of full-thickness skin wounds. To achieve this, full-thickness wounds of size 1.767 cm² were created at the dorsum part of nude mice and treated with keratinocytes (2 × 10⁴ cells/cm²) and fibroblasts (3 × 10⁴ cells/cm²) suspended in 10% PRP-enriched medium. Wound examination was conducted weekly and the animals were euthanized after 2 weeks. Gross examination showed that re-epithelialization was fastest in the PRP+cells group at both day 7 and 14, followed by the PRP group and NT group receiving no treatment. Only the PRP+cells group achieved complete wound closure by 2 weeks. Epidermal layer was presence in the central region of the wound of the PRP+cells and PRP groups but absence in the NT group. Comparison between the PRP+cells and PRP groups showed that the PRP+cells-treated wound was more mature as indicated by the presence of thinner epidermis with single cell layer thick basal keratinocytes and less cellular dermis. In summary, the combination of low cell density and diluted PRP creates a synergistic effect which expedites the healing of full-thickness wounds. This combination has the potential to be developed as a rapid wound therapy via the direct application of freshly harvested skin cells in diluted PRP.     

瓜蒌薤白汤对平阳霉素所致大鼠肺纤维化肺组织中细胞因子PDGF-BB表达的影响

目的：探讨瓜蒌薤白汤防治肺纤维化的作用机制。方法：大鼠随机分为正常组，模型组，瓜蒌薤白汤组，阳性药氢化可的松组。用平阳霉素（3mg&#183;kg^-1）复制大鼠肺纤维化模型后，用药组每天灌胃瓜蒌薤白汤0．02mL&#183;kg^-1，氢化可的松组腹腔注射5mg&#183;kg^-1。用药28d后处死，观察、比较各组大鼠肺组织中血小板源生长因子BB（PDGF-BB）的表达。结果：模型组大鼠肺组织中PDGF-BB表达均明显高于正常组及用药组（P〈0．05）。结论：瓜蒌薤白汤能明显抑制肺组织中PDGF-BB过度表达。