Meningioma originating from the superior petrosal vein without dural attachment:A case report

BACKGROUND Meningioma in the cerebellopontine angle(CPA)without dural attachment is extremely rare.We report a unique case of meningioma derived from the superior petrosal vein without dural attachment.CASE SUMMARY A 44-year-old right-handed woman presented with a two-month history of headache and tinnitus.Brain magnetic resonance imaging showed a well-defined contrast-enhancing lesion in the right CPA without a dural tail sign.Tumor resection was performed using a right retro sigmoid approach.A dural attachment was not seen at the tentorium or posterior surface of the petrous pyramid.The tumor was firmly adherent to the superior petrosal vein.The origin site was cauterized and resected with the preservation of the superior petrosal vein.A diagnosis of meningothelial meningioma was made.The patient’s headache and tinnitus gradually disappeared,and a recurrence was not observed five years after the surgery.CONCLUSION The rare occurrence of meningioma without dural attachment makes it difficult to determine dural attachment before surgery.The absence of dural attachment makes it easy to completely resect such tumors.Vessels related to tumors should be removed carefully,considering the possible presence of tumor stem cells in the microvessels.

Technological Impact on the Quality of Palm Oil from Burundi: Elaeis guineensis, Variety of Dura and Tenera

The objective of this study is to determine the factors responsible for the acidification of Burundi palm oils. The investigation of the duration of fermentation of palm fruits performed among artisanal producers found that more than 89% of producers from commune of Rumonge ferment for more than 5 days while more than 61% of those from commune of Mutimbuzi ferment for 4 days. The determination of acid value using the method of ISO 660:2009 showed that Dura and Tenera varieties fermented for 4 days had respectively 5.9 ± 2.3 and 5.8 ± 1.8 mg of KOH/g of oil for clustered fruits, 7.03 ± 3.4 and 7.02 ± 3.2 mg of KOH/g for destemmed fruits. After 8 days, the acid values of Dura and Tenera varieties obtained were respectively 10.9 ± 4.7 and 12.5 ± 5.4 mg KOH/g for clustered fruits, 12.5 ± 5.4 and 12.5 ± 4.1 mg KOH/g for destemmed fruits. No significant difference was recorded between varieties. On the other hand, a highly significant difference at p < 0.05 was obtained between fruits fermented in the open air (e.g. around the foot of the oil palm, FFOA), in a shed when the fruits were not covered (SFNC) and in a shed when the fruits were covered by branches or straw (SFC). At 8 days of fermentation, the acid values of FFOA, SFNC and SFC were 9.1 ± 0.7 < 12.6 ± 0.8 < 17.7 ± 1.4 for destemmed fruit and 9.1 ± 0.7 < 13.2 ± 1.3 < 13.2 ± 3.2 for clustered fruit, respectively. In light of these results, the acidity of Rumonge palm oil is probably due to the long fermentation time and the technique of covering the fruits during fermentation. These results will allow producers to extract good quality oil and consequently improve the health of consumers.

Evidence for novel age-dependent network structures as a putative primo vascular network in the dura mater of the rat brain

With chromium-hematoxylin staining, we found evidence for the existence of novel age-dependent network structures in the dura mater of rat brains. Under stereomicroscopy, we noticed that chromium-hematoxylin-stained threadlike structures, which were barely observable in 1-weekold rats, were networked in specific areas of the brain, for example, the lateral lobes and the cerebella, in 4-week-old rats. In 7-week-old rats, those structures were found to have become larger and better networked. With phase contrast microscopy, we found that in 1-week-old rats, chromium-hematoxylin-stained granules were scattered in the same areas of the brain in which the network structures would later be observed in the 4- and 7-week-old rats. Such age-dependent network structures were examined by using optical and transmission electron microscopy, and the following results were obtained. The scattered granules fused into networks with increasing age. Cross-sections of the age-dependent network structures demonstrated heavily-stained basophilic substructures. Transmission electron microscopy revealed the basophilic substructures to be clusters with high electron densities consisting of nanosized particles. We report these data as evidence for the existence of age-dependent network structures in the dura mater, we discuss their putative functions of age-dependent network structures beyond the general concept of the dura mater as a supporting matrix.

Dura Mater: Anatomy and Clinical Implication

The dura mater is of similar embryological origin to the fascial organ. It contains several fibroblasts which make the dura mater a flexible structure. Dura mater is the outermost of the three layers of meninges, a thick and rigid inelastic membrane that covers the brain and spinal cord and that is impermeable to the cerebrospinal fluid. The cranial dura mater in certain respects differs anatomically from the dura material in the spinal cord, and it is important to classify them separately. This article reviews the anatomical structure of spinal and cranial dura mater and its anatomy with muscle, fascia, bone structure and ligaments. Dura mater is a structure in the body that is connected with systemic functions.

耳内镜下鼓膜修补术后穿孔再修补的疗效分析

目的 探讨人工硬脑膜和表皮生长因子在耳内镜下鼓膜修补术后鼓膜穿孔再修补中的临床疗效。方法 选择该院耳内镜下鼓膜修补术后复查时仍有鼓膜穿孔未愈合的患者58例,随机分为A组和B组,各29例。A组采用明胶海绵修补鼓膜穿孔,B组采用人工硬脑膜和表皮生长因子修补鼓膜穿孔,每个月复查鼓膜愈合情况,3个月后复查纯间测听。结果 A组修补成功率为34.48%(10/29),B组修补成功率为75.86%(22/29),两组患者比较,差异有统计学意义(P <0.05);A组气骨导差改善(7.32±2.68) dB HL,B组气骨导差改善(21.77±4.65)dB HL,两组患者比较,差异有统计学意义(P <0.05)。结论 人工硬脑膜是合适的鼓膜再生支架,表皮生长因子可促进鼓膜穿孔愈合,两者结合使用是鼓膜再修补的一种可行的治疗方案。

应用异体硬脑膜行改良后巩膜加固术治疗病理性近视的临床效果观察

目的:探讨应用异体硬脑膜行改良后巩膜加固术(PSR)治疗病理性近视(PM)的临床效果。方法:选择2022年1—10月南昌爱尔眼科医院收治30例(33只眼)PM患者,均应用异体硬脑膜行改良PSR治疗。比较治疗前后屈光度(SE)、眼轴长度、视盘与黄斑血流密度、最佳矫正视力(BCVA)、眼压(IOP),并记录术后并发症发生情况。结果:治疗后3个月,SE及黄斑区浅层毛细血管丛(SCP)、深层毛细血管丛(DCP)血流密度均高于治疗前,眼轴长度短于治疗前,差异均有统计学意义(P<0.05)。治疗前、治疗后3个月,BCVA、IOP、视盘内及周围血流密度比较,差异均无统计学意义(P>0.05)。术后短期内30例患者未发生严重并发症,但均出现轻度结膜充血水肿,症状2周后明显缓解,有3例(3只眼)出现轻度视物变形,4例(4只眼)出现一过性眼压升高,使用7 d降眼压滴眼液后均改善。结论:应用异体硬脑膜行改良PSR治疗PM安全可行,改善黄斑区视网膜血流循环,延缓SE、眼轴长度增长。

人类卵母细胞及植入前胚胎中母性效应基因Mater mRNA的表达

目的:了解母性效应基因Mater表达与人类卵母细胞及早期胚胎发育不同阶段的关系。方法:用巢式逆转录多聚酶链式反应(single cell nested RT-PCR)方法检测人类卵子和植入前各阶段胚胎的母性效应基因Mater mRNA的表达。结果:Mater在人类卵母细胞GV、MⅠ、MⅡ都有表达,植入前胚胎1、2、4、6细胞期表达量逐渐下降,到8细胞期、囊胚、孵出囊胚期均未检测到Mater mRNA表达。结论:人类卵母细胞和植入前胚胎Mater基因的表达量随发育时间的改变而变化,对卵子生长和胚胎发育有重要意义,与母性效应基因在小鼠等其他哺乳动物中的表达模式相似。

人工硬脑膜DuraGen^(TM)植入转归的实验研究

目的通过动物实验,观察人工生物型硬脑膜DuraGenTM植入后的转归过程。方法将DuraGenTM修补于15头实验猪右侧硬膜缺损处,左侧作为对照。在修补后1、3、6个月分别处死5头实验猪,行大体标本、光镜和电镜检查,观察人工生物型硬脑膜修补对硬脑膜缺损的作用。结果新生自体纤维组织逐步建立于植入物内,形成一个由新生纤维组织和植入物支架组织交织在一起的中间态结构。新生纤维组织逐渐增加,植入支架结构逐步吸收并最终被新生纤维组织所替代。结论人工生物型脑膜DuraGenTM具有良好的组织相容性,是目前理想的硬脑膜修补材料。

颅缝发育与颅缝早闭的分子机制

颅骨的发育依赖于颅缝(cranial suture)正常的骨供给,期间颅缝的间充质干细胞经历系统地增殖和成骨分化以保证骨的正常生长。遗传因素或外界干扰则可能引起干细胞的过度成骨分化,导致颅骨的过早闭合,称为颅缝早闭。颅缝细胞与细胞外基质、骨膜以及脑膜共同构成颅缝微环境(niche)。它们相互调节以保证颅缝的正常发育。临床研究发现,绝大多数颅缝早闭(craniosynostosis)患者都伴有硬脑膜和细胞外基质(extracellular matrixc,ECM)的异常。许多研究也发现,作用于颅缝的异常外界机械刺激也可能导致颅缝发育的异常。考虑到颅缝发育受多方面因素影响,本篇综述将介绍近年来有关颅缝微环境异常,以及机械力在调控颅缝发育中的研究进展,总结颅缝早闭发生的分子机制和目前研究方向,旨在为该病的诊断治疗提供新的思路。

大鼠硬脑膜对颅骨成骨增强的影响

背景:硬脑膜与颅骨在结构和功能上联系密切,原代提取硬脑膜和颅骨细胞并将二者共培养的研究几乎没有,利用原代细胞探究硬脑膜对颅骨的影响具有创新性,有望为临床治疗提供理论依据。目的:原代提取大鼠硬脑膜和颅骨细胞,观察硬脑膜对颅骨增殖和分化能力的影响,初步了解Twist1在其中的作用。方法:利用酶解法与组织块法相结合的方法原代提取出生3 d内大鼠硬脑膜细胞和颅骨细胞,免疫荧光染色鉴定所提取细胞,茜素红染色鉴定与评估颅骨细胞及其矿化能力,real-time PCR检测硬脑膜细胞与颅骨细胞共培养后,颅骨细胞增殖与成骨相关基因表达及Twist1的表达。结果与结论:①形态学:所提取硬脑膜细胞形态特征与成纤维细胞一致,成骨细胞呈纺锤形。②细胞鉴定:免疫荧光染色显示,所提取硬脑膜细胞表达高水平的波形蛋白,颅骨细胞表达高水平的碱性磷酸酶;成骨诱导28 d颅骨细胞茜素红染色观察到明显的矿化结节。③real-time PCR检测显示,与对照组比较,共培养组PCNA、碱性磷酸酶、RUNX2 mRNA表达升高(P<0.01);Twist1 mRNA表达降低(P<0.01)。④结果表明,原代提取的颅骨细胞具有较强的矿化能力,硬脑膜是促进颅骨的生长发育与成骨分化的重要因素,且Twist1在该过程中发挥重要作用。

川芎天麻对偏头痛治疗作用的动物实验研究

目的探讨川芎天麻对大鼠偏头痛的治疗作用及对硬脑膜肥大细胞脱颗粒的影响。方法将28只雄性SD大鼠随机分为对照组、模型组、川芎天麻组和托吡酯组,每组7只。模型组与对照组超纯水灌胃,川芎天麻组川芎天麻颗粒(4∶1)灌胃,托吡酯组托吡酯溶液灌胃,持续1周。对照组腹腔注射0.9%氯化钠溶液,其余组腹腔注射硝酸甘油建立偏头痛大鼠模型。记录各组60~90 min的挠头次数和是否存在耳红症状,比较各组肥大细胞脱颗粒阳性率。结果川芎天麻颗粒能改善硝酸甘油诱导偏头痛大鼠的挠头症状(P<0.05),同时还能抑制肥大细胞脱颗粒(P<0.05)。结论川芎天麻和托吡酯均对硝酸甘油诱导的偏头痛大鼠头痛起到一定的治疗作用,可能与其抑制肥大细胞脱颗粒有关。

Dura-Guard应用于去骨瓣减压术临床分析

目的 探讨在去骨瓣减压术中应用Dura -Guard行硬脑膜减张修补的临床意义。方法 对 6 8例重型颅脑损伤病人分为硬脑膜修补组和硬脑膜开放组进行了临床观察 ,其中硬脑膜修补组均采用Dura -Guard行硬脑膜减张修补。结果 两组临床预后无差异 ,硬脑膜修补组并发症 :分流依赖性脑积水、硬膜下积液、伤口脑脊液漏的发生率明显低于硬脑膜开放组 (P <0 .0 5 )。结论 去骨瓣减压术时以Dura -Guard减张修补硬脑膜减少了术后并发症 ,有利于康复 。

骨形态发生蛋白2在小儿颅骨缺损自行修复中的作用

颅脑外伤在小儿各类外伤中占据首位。去骨瓣减压术为神经外科常见减少颅内压的手术方式,颅骨缺失会导致患儿脑组织缺少颅骨保护,颅骨作为脑组织最直接的保护屏障,若缺损不及时修补会因体位、情绪和腹压等会导致脑组织在颅内发生移动,从而造成脑穿通性畸形、癫痫发作和脑变性萎缩等疾病。小儿有好动、依从性差、自我保护能力差等特点,更容易形成二次伤害。小儿处于生长发育期,缺乏颅骨的保护,颅脑容易受到二次伤害,还会影响患儿神经系统的正常发育,造成患儿智力低下,神经系统发育不完善等相关并发症,所以重建颅骨的完整对患儿的生长发育至关重要。未成熟硬脑膜对颅骨的发育和缺损修复有重要作用,2岁以下的儿童能够修复巨大的颅骨缺损,而成年人则缺乏这种内源性能力。幼龄动物骨缺损中骨形态发生蛋白2(BMP2)上调,表明BMP2在骨组织再生中具有重要作用。许多生物调节因子可调控BMP2的活性。该综述就BMP2在小儿颅骨缺损修复中的研究现状做总结。

小鼠Mater基因选择性剪接变异体的鉴定和分析

位于小鼠第 7号常染色体的Mater (Maternalantigenthatembryosrequire)编码一个卵母细胞特异的自身抗原 ,与小鼠自免疫性卵巢退化疾病密切相关。在发现Mater基因存在选择性前切现象的基础上 ,通过RT PCR技术 ,在 3个近交品系小鼠 (CBA/J、SWR/J、B6 )中发现并初步验证了Mater基因mRNA的 4种选择性剪接变异体 ,分别命名为B、E、F、G型。其中B型与以前报道的一致 ,具有MatermRNA的全部外显子 ,E、F、G为新发现的剪接变异体 ,其选择性剪接位点都位于阅读框内。E变异体缺失了外显子 6 ,F变异体保留了部分内含子 8并且缺失了外显子 10 ,G变异体缺失了部分外显子 14 ,它们所有的内含子与外显子结合处的DNA序列都遵循“GT AG”剪接规则。B、E、F在B6、CBA/J和SWR/J小鼠品系中均存在 ,G仅存在于SWR/J。根据新发现的 3种剪接变异体的cDNA序列推导出对应的预期蛋白异形体的氨基酸序列 。

干细胞工程化双面异性静电纺丝膜促进硬脊膜修复的体外实验

背景:目前临床上采用自体组织或明胶海绵等材料对硬脊膜进行修补,但都存在不同程度的缺陷,因此亟需一种可以促进硬脊膜修复的生物材料。目的:利用定向静电纺丝及胶原自组装技术构建双面异性静电纺丝膜,并将其负载骨髓间充质干细胞构建人工硬脊膜,探讨该人工硬脊膜的各项理化性能以及生物特性。方法:采用静电纺丝技术及胶原自组装技术制备有序聚乳酸静电纺丝纤维的双面(一面为胶原蛋白,另一面为聚乳酸)异性静电纺丝膜(胶原组)、无序的聚乳酸静电纺丝膜(无序纤维组)、有序定向的聚乳酸静电纺丝膜(有序纤维组),通过扫描电镜、力学拉伸、水接触角测试、降解实验等来表征静电纺丝膜的理化性能。将胶原组(在胶原蛋白面接种骨髓间充质干细胞,即得到干细胞工程化静电纺丝膜)、无序纤维组、有序纤维组静电纺丝膜分别与骨髓间充质干细胞共培养,采用CCK-8法和活/死染色评估静电纺丝膜的生物相容性,整合素β1免疫荧光染色评估静电纺丝膜的黏附特性。将干细胞工程化静电纺丝膜及胶原组静电纺丝膜分别与骨髓巨噬细胞共培养,通过诱导型一氧化氮合酶(M1型)、CD206(M2型)免疫荧光染色及qRT-PCR检测炎症相关基因的表达来评估免疫调控性能。结果与结论:①定向静电纺丝纤维膜可模拟天然硬脊膜的纵向排列结构,胶原蛋白加入后,纤维膜的亲水性提高约2倍,力学性能提升了1.2倍;②与骨髓间充质干细胞共培养时,CCK-8和活/死染色显示,胶原组静电纺丝膜的细胞生物活性明显高于无序纤维组、有序纤维组;免疫荧光染色显示,胶原组整合素β1表达约为无序纤维组、有序纤维组的2.6倍,且细胞铺展形态良好;③与骨髓巨噬细胞共培养时,免疫荧光染色显示,干细胞工程化静电纺丝膜组M1型巨噬细胞荧光强度低于胶原组(P<0.01),M2型巨噬细胞荧光强度高于胶原组(P<0.01);qRT-PCR检测显示,干细胞工程化静电纺丝膜组促炎性基因肿瘤坏死因子α和白细胞介素1βmRNA表达低于胶原组(P<0.001),抑炎性基因白细胞介素10和转化生长因子βmRNA表达高于胶原组(P<0.001);④结果表明,干细胞工程化的两面异性人工硬脊膜可模拟正常硬脊膜的定向结构,内表面利于细胞生长黏附,外表面避免组织粘连,同时通过间充质干细胞旁分泌组分促进巨噬细胞向M2亚型极化,调控局部的炎症微环境。

Combined application of organic fertilizer and chemical fertilizer alleviates the kernel position effect in summer maize by promoting post-silking nitrogen uptake and dry matter accumulation

Adjusting agronomic measures to alleviate the kernel position effect in maize is important for ensuring high yields.In order to clarify whether the combined application of organic fertilizer and chemical fertilizer(CAOFCF)can alleviate the kernel position effect of summer maize,field experiments were conducted during the 2019 and 2020 growing seasons,and five treatments were assessed:CF,100%chemical fertilizer;OFCF1,15%organic fertilizer+85%chemical fertilizer;OFCF2,30%organic fertilizer+70%chemical fertilizer;OFCF3,45%organic fertilizer+55%chemical fertilizer;and OFCF4,60%organic fertilizer+40%chemical fertilizer.Compared with the CF treatment,the OFCF1 and OFCF2 treatments significantly alleviated the kernel position effect by increasing the weight ratio of inferior kernels to superior kernels and reducing the weight gap between the superior and inferior kernels.These effects were largely due to the improved filling and starch accumulation of inferior kernels.However,there were no obvious differences in the kernel position effect among plants treated with CF,OFCF3,or OFCF4 in most cases.Leaf area indexes,post-silking photosynthetic rates,and net assimilation rates were higher in plants treated with OFCF1 or OFCF2 than in those treated with CF,reflecting an enhanced photosynthetic capacity and improved postsilking dry matter accumulation(DMA)in the plants treated with OFCF1 or OFCF2.Compared with the CF treatment,the OFCF1 and OFCF2 treatments increased post-silking N uptake by 66.3 and 75.5%,respectively,which was the major factor driving post-silking photosynthetic capacity and DMA.Moreover,the increases in root DMA and zeatin riboside content observed following the OFCF1 and OFCF2 treatments resulted in reduced root senescence,which is associated with an increased post-silking N uptake.Analyses showed that post-silking N uptake,DMA,and grain yield in summer maize were negatively correlated with the kernel position effect.In conclusion,the combined application of 15-30%organic fertilizer and 70-85%chemical fertilizer alleviated the kernel position effect in summer maize by improving post-silking N uptake and DMA.These results provide new insights into how CAOFCF can be used to improve maize productivity.

硬膜替代材料Dura-L移植后的形态学与免疫原性研究

目的研究新型硬膜替代材料Dura-L移植后的形态学与免疫原性。方法选用40只成年雄性家兔,随机等分成5组:A:单侧自体移植无创组,B:单侧自体移植创伤组,C:单侧Dura-L移植加对侧自体移植无创组,D:单侧Dura-L移植加对侧自体移植创伤组,E:单侧阳性对照膜移植无创组。应用显微外科技术在无菌条件下施行硬膜替代手术,将Dura-L移植于C、D组兔脑表面。分别于2周、1个月、3个月应用扫描电镜、免疫荧光、病理学切片检测进行评价。结果2周末、1个月末、3个月末C组、D组与E组间在表面光滑程度、荧光强度、炎性细胞浸润三方面之间的差异具有统计学意义,而与A、B两组间的差异不具有统计学意义。结论Dura-L移植后形态学与家兔硬膜类似,免疫原性低,是一种比较适合的硬膜替代材料。

吉林省公共卫生硕士教育发展的策略分析调查报告——基于SWOT分析

通过SWOT分析法梳理吉林省公共卫生硕士教育现状,剖析教育发展中的优势、劣势、机遇和挑战,针对存在的问题提出相应对策与建议,为不断培养高素质、高层次、应用型公共卫生人才,进一步提高其综合能力,满足社会和人民群众卫生健康需求提供科学依据。

肺超声技术在妊娠期高血压疾病产妇容量管理中的应用研究

目的探讨肺超声技术在妊娠期高血压疾病产妇容量管理中的应用效果。方法选取2022年3月至2023年12月在北京市海淀区妇幼保健院住院行剖宫产术的妊娠期高血压疾病的产妇291例,按随机数字表法随机分为试验组(肺超声组)144例和对照组147例,肺超声组,在开腹前(T_(0))、胎儿娩出后5min(T_(1))、手术结束(T_(2))实施肺超声扫查如显示肺损伤程度评分为2分时,给予利尿处理;对照组,当中心静脉压(CVP)>12 cm H_(2)O,或少尿时给与利尿处理。观察并记录2组产妇的年龄、身高、体质量、孕周、疾病类型;术中记录2组产妇T_(0)、T_(1)、T_(2)时,平均动脉压(MAP)、心率;记录手术时长、术中液体入量、输血量、术中出血量、尿量、血管活性药物的剂量、利尿剂的剂量;肺超声组记录术毕(T_(2))两肺的肺损伤程度评分、CVP值、氧合指数(oxygenation Index,OI)。记录2组产妇术后24 h肺部并发症的发生情况、住院时间。结果2组产妇组间年龄、身高、体质量、孕周、疾病类型等比较,差异均无统计学意义(P>0.05);2组产妇T_(0)、T_(1)、T_(2)的MAP、心率比较,差异均无统计学意义(P>0.05);2组产妇MAP、HR组内比较,差异具有统计学意义(P<0.001)2组产妇手术时长、术中液体入量、输血量、术中出血量、尿量比较,差异均无统计学意义(P>0.05);2组产妇术中血管活性药物的使用剂量比较,差异无统计学意义(P>0.05);2组产妇呋塞米的使用剂量比较,差异具有统计学意义(P<0.05);2组产妇肺部并发症的发生情况的比较差异有统计学意义(P<0.05);2组住院时间比较,差异均无统计学意义(P>0.05);试验组肺损伤程度评分与氧合指数(OI)呈显著负相关(r=-0.249,P=0.005);肺损伤程度评分与CVP值之间呈显著正相关(r=0.425,P<0.01)。结论肺部超声技术可以直观、动态地评估妊娠期高血压疾病产妇的容量情况,在容量管理方面有一定的优势,值得临床推广应用。

Induced dural lymphangiogenesis facilities soluble amyloid-beta clearance from brain in a transgenic mouse model of Alzheimer's disease

Impaired amyloid-β clearance from the brain is a core pathological event in Alzheimer＇s disease.The therapeutic effect of current pharmacotherapies is unsatisfactory,and some treatments cause severe side effects.The meningeal lymphatic vessels might be a new route for amyloid-β clearance.This study investigated whether promoting dural lymphangiogenesis facilitated the clearance of amyloid-β from the brain.First,human lymphatic endothelial cells were treated with 100 ng/m L recombinant human vascular endothelial growth factor-C（rh VEGF-C） protein.Light microscopy verified that rh VEGF-C,a specific ligand for vascular endothelial growth factor receptor-3（VEGFR-3）,significantly promoted tube formation of human lymphatic endothelial cells in vitro.In an in vivo study,200 μg/m L rh VEGF-C was injected into the cisterna magna of APP/PS1 transgenic mice,once every 2 days,four times in total.Immunofluorescence staining demonstrated high levels of dural lymphangiogenesis in Alzheimer＇s disease mice.One week after rh VEGF-C administration,enzyme-linked immunosorbent assay results showed that levels of soluble amyloid-β were decreased in cerebrospinal fluid and brain.The Morris water maze test demonstrated that spatial cognition was restored.These results indicate that the upregulation of dural lymphangiogenesis facilities amyloid-β clearance from the brain of APP/PS1 mice,suggesting the potential of the VEGF-C/VEGFR-3 signaling pathway as a therapeutic target for Alzheimer＇s disease.