p75

摘要： 2020年11月12日,印度海军第5艘P75型“卡尔瓦里”级潜艇“瓦吉尔”号(S25)在马扎冈船坞造船有限公司下水(题图)。

摘要： 目的 探讨神经生长因子(NGF)及其受体TrkA、p75在子宫内膜异位症患者中的临床意义.方法 随机选取2014年1月至2016年12月收治的子宫内膜异位症患者100例,其中腹壁子宫内膜异位结节(AEM)22例,卵巢子宫内膜异位囊肿(OEM)45例,宫骶韧带深部浸润型子宫内膜异位结节(DIE)33例,所有患者术前采用视觉模拟(VAS)评分法对术前疼痛进行评分,入组病例为评分在0分或10分的病例,并根据评分分为无疼痛组和疼痛组.应用免疫组织化学法对组织标本患者病灶中TrkA、p75及NGF的蛋白表达进行检测.另外选择20例同期子宫肌瘤且无疼痛患者的宫骶韧带组织作为对照组.结果 与对照组比较,NGF及其受体TrkA、p75在AEM、OEM及DIE病灶中的表达均明显升高,差异均具有统计学意义(P0.05).结论 子宫内膜异位症的发生和发展与NGF及受体p75、TrkA的参与有关,子宫内膜异位症患者疼痛的发生与受体p75有关.

摘要： 目的探讨神经生长因子(NGF)及其受体与早期宫颈癌嗜神经侵袭(PNI)和其他临床病理因素的相关性。方法选取2010年1月至2014年6月间,在广西医科大学附属肿瘤医院妇瘤科行根治性子宫切除术+盆腔淋巴结清扫术治疗的Ⅰb～Ⅱa2期宫颈癌患者60例,回顾性分析其临床病理资料,并用免疫组织化学法分析术后标本中NGF、TrkA、p75的表达情况,评估NGF及受体与PNI、其他病理因素的关联性。结果宫颈癌PNI的发生与NGF和受体TrkA的高表达明显正相关(P=0.025,P=0.011);PNI阳性的患者中,NGF、TrkA染色阳性面积也较PNI阴性的患者明显增多,差异有统计学意义(P=0.016, P=0.026);NGF、TrkA的表达也与淋巴脉管间隙浸润(LVSI)的发生密切相关(P=0.029, P=0.019),而与其他临床病理因素无相关性(均P>0.05);p75的表达与宫颈癌PNI和其他病理因素无明显关联(P>0.05)。结论 NGF、TrkA的高表达与早期宫颈癌PNI的发生具有一定的关联性,提示NGF和TrkA可能参与了PNI发生的相关分子机制。

摘要： 目的 探讨神经生长因子(NGF)对体外培养角膜缘干细胞(LSCs)的影响及其受体在LSCs上的表达与细胞增殖的关系.方法 体外培养LSCs,分对照组和NGF组传代培养,分别选取各组培养1 d、3 d和5 d的细胞,免疫细胞化学检测p63、TrkA、p75表达.结果 NGF组在1 d、3 d、5 d时间点p63表达平均灰度值低于对照组,差异有统计学意义(P<0.05).NGF组各时间点TrkA表达平均灰度值低于对照组,差异有统计学意义(P<0.05).NGF组各时间点p75表达平均灰度值低于对照组,差异有统计学意义(P<0.05).Pearson相关分析TrkA表达平均灰度值与p63表达平均灰度值,差异有统计学意义(P<0.05).结论NGF有维持LSCs的干细胞特性的作用,LSCs可表达NGF受体TrkA和p75,且TrkA的表达与LSCs的增殖有相关性.%Objective To investgate the effect of nervous growth factor(NGF) on the proliferation of the limbal stem cells(LSCs) in vitro,and the relationship bewteen expression of its receptors and cell proliferation.Methods After primary cultured,LSCs were divided into the control group and the NGF group.Selected cells cultured of 1 d,3 d and 5 d in the two groups and examined the expression of p63,TrkA,p75 with immunohistochemistry.Results The average gray scale values of expression of p63,TrkA and p75 at 1 d,3 d and 5 d in NGF group were significant decreased compared with the corresponding data in the control group(P<0.05).Pearson's correlations analysis showed that the average gray scale values of expression of TrkA and p63 were of statistically significant differences(P<0.05).Conclusion These results highlight that NGF could maintain the stem cell properties of LSCs.LSCs could exepress the NGF receptors of TrkA and p75,and the expression of TrkA showed a correlation with LSCs proliferation.

摘要： 神经生长因子（never growth factor，NGF）属于神经营养因子家族成员，是最早被发现的一种神经营养因子，与其受体 TrkA 或 p75结合后在神经细胞的生长、发育、修复及功能发挥中具有重要的作用。近年来有研究发现，NGF 对例如生殖系统、内分泌系统、循环系统和免疫系统等也有一定的调节作用。论文就 NGF 及其受体在雌性动物卵巢、输卵管及子宫中的表达与作用进行综述。%Nerve growth factor (NGF)belongs to the neurotrophin factor family,and is a earliest discovered neurotrophic factor.It plays an important role in the growth,development,repair and function of nerve cells when NGF combines with its receptor TrkA or p75.In recent years,some researchers found that NGF also has effects on the other system such as reproductive system,endocrine system,circulatory system and immune system and so on.This paper reviewed the expression and role of NGF and its receptors in the o-varies,fallopian tubes and uteri of female animals.

摘要： 目的通过观察内源性NGF-TrkA及下游通路的分子基因转录特点,探讨针刺治疗对高眼压后兔视网膜神经节细胞的保护作用。方法 30只新西兰兔,采用随机数字表法随机将8只设为正常组,剩余22只造模。再次采用随机数字表法将造模成功后16只随机分为模型组、针刺组,每组8只兔。模型组与针刺组以复方卡波姆诱导建立慢性高眼压兔模型。造模2周后,针刺组开始给予毫针＂合谷（LI4）、睛明（BL1）、球后（Ex-HN07）＂穴治疗,每周3次,隔天1次,共治疗4周（12次）;正常组和模型组不予治疗。治疗结束后,取3组兔眼球,行视网膜HE染色观测组织内形态学变化;采用RT-PCR法检测视网膜内神经生长因子信使核糖核酸（NGF mRNA）、神经生长因子受体酪氨酸激酶信使核糖核酸（TrkA mRNA）和神经营养素受体信使核糖核酸（p75 mRNA）的转录水平;以Western blotting法检测视网膜内NGF信号通路下游分子AKT（p-AKT）的表达水平。结果在治疗过程中,针刺组眼压均值波动在20.86~22.23 mm Hg之间,模型组眼压波动在23.82~25.49 mm Hg之间;造模后模型组、针刺组各时间点眼压与正常组比较,差异均有统计学意义（P〈0.05）。模型组视网膜整体结构有明显变化,内核层、外核层均排列混乱且两层之间边界不清,且内核层的双极细胞和外核层的视杆细胞、视锥细胞数量有所减少,神经节细胞层显示细胞核间距增大,数量有所减少。与模型组相比,针刺组内核层双极细胞数量稳定,内核层与外核层之间边界尚清,神经节细胞层细胞核间距减小,数量有所增加。视网膜内NGF mRNA、TrkA mRNA转录水平均增强,p75 mRNA转录水平降低,下游信号分子AKT表达针刺组较正常组增强,针刺组较模型组增强。结论①针刺作用于慢性高眼压后兔模型,能稳定眼压,可以使视网膜病理损害减轻,稳定神经节细胞数量,有效保护慢性高眼压后兔模型的RGC。②针刺可以提升NGF-TrkA在慢性高眼压兔模型视网膜组织内的转录水平,降低p75在慢性高眼压兔模型视网膜组织内的转录水平,提升下游信号分子AKT的磷酸化水平。

摘要： 目的：探讨补肾益智方对阿尔茨海默病（AD）模型大鼠SM－DB区域中p75水平的影响。方法通过D－半乳糖催老和无名质区损毁的方法制备AD大鼠模型，并设立石杉碱甲对照组和老年正常组进行对比研究。通过免疫组化对SM－DB区域（包括SM、vDB和hDB三个分区）中的p75阳性细胞进行分析。结果补肾益智方高、低剂量组对SM－DB区域中的 p75阳性细胞数目、平均截面积和平均灰度值均有十分明显的改善作用，其中低剂量组作用最大，高剂量组次之，两者的作用均较石杉碱甲组为优，低剂量组在三个区域的阳性细胞数、hDB区的阳性细胞平均截面积以及SM区内阳性细胞的灰度值与石杉碱甲组均有显著性差异。结论补肾益智方可以明显提高该模型脑内的p75水平，其作用优于石杉碱甲，且作用大小与用药剂量有较明显的关系。

摘要： Mesenchymal stem cells, due to their characteristics are ideal candidates for cellular therapy. Currently, in culture these cells are defined by their adherence to plastic, specific surface antigen expression and multipotent differentiation potential. However, the in vivo identification of mesenchymal stem cells, before culture, is not so well established. Pre-culture identification markers would ensure higher purity than that obtained with selection based on adherence to plastic. Up until now, CD271 has been described as the most specific marker for the characterization andpurification of human bone marrow mesenchymal stem cells. This marker has been shown to be specifically expressed by these cells. Thus, CD271 has been proposed as a versatile marker to selectively isolated and expand multipotent mesenchymal stem cells with both immunosuppressive and lymphohematopoietic engraftment-promoting properties. This review focuses on this marker, specifically on identification of mesenchymal stem cells from different tissues. Literature revision suggests that CD271 should not be defined as a universal marker to identify mesenchymal stem cells before culture from different sources. In the case of bone marrow or adipose tissue, CD271 could be considered a quite suitable marker; however this marker seems to be inadequate for the isolation of mesenchymal stem cells from other tissues such as umbilical cord blood or wharton's jelly among others.

摘要： 本实用新型公开了一种七七五电机用清洁钩，属于商用工具。包括塑料、公魔术粘，其特征是：可以兼容D轴七七五电机，同时，可以兼容各种类型、材质的抹布，还可以兼容各种类型、材质的清洁布，其主体直径大小略小于透明玻璃杯，使其可以用于玻璃杯内部的清洁以及特种餐具的清洁，提升了七七五电机用作餐饮行业人操电动清洁设备的实用性以及性价比，满足人们对于人操电动餐饮清洁设备的实用性以及兼容性需求。本实用新型方便实用、量产成本低、制造简单、耗材兼容性强。