Choroidal neovascularization characterizes wet age-related macular degeneration.Choroidal neovascularization formation involves a primarily angiogenic process that is combined with both inflammation and proteolysis.A ...Choroidal neovascularization characterizes wet age-related macular degeneration.Choroidal neovascularization formation involves a primarily angiogenic process that is combined with both inflammation and proteolysis.A primary cause of choroidal neovascularization pathogenesis is alterations in pro-and anti-angiogenic factors derived from the retinal pigment epithelium,with vascular endothelium growth factor being mainly responsible for both clinical and experimental choroidal neovascularization.MicroRNAs(miRNAs)which are short,non-coding,endogenous RNA molecules have a major role in regulating various pathological processes,including inflammation and angiogenesis.A review of recent studies with the mouse laser-induced choroidal neovascularization model has shown alterations in miRNA expression in choroidal neovascularization tissues and could be potential therapeutic targets for wet age-related macular degeneration.Upregulation of miR-505(days 1 and 3 post-laser),miR-155(day 14)occurred in retina;miR-342-5p(days 3 and 7),miR-126-3p(day 14)in choroid;miR-23a,miR-24,miR-27a(day 7)in retina/choroid;miR-505(days 1 and 3)in retinal pigment epithelium/choroid;downregulation of miR-155(days 1 and 3),miR-29a,miR-29b,miR-29c(day 5),miR-93(day 14),miR-126(day 14)occurred in retinal pigment epithelium/choroid.Therapies using miRNA mimics or inhibitors were found to decrease choroidal neovascularization lesions.Choroidal neovascularization development was reduced by overexpression of miR-155,miR-188-5p,miR-(5,B,7),miR-126-3p,miR-342-5p,miR-93,miR-126,miR-195a-3p,miR-24,miR-21,miR-31,miR-150,and miR-184,or suppression of miR-505,miR-126-3p,miR-155,and miR-23/27.Further studies are warranted to determine miRNA expression in mouse laser-induced choroidal neovascularization models in order to validate and extend the reported findings.Important experimental variables need to be standardized;these include the strain and age of animals,gender,number and position of laser burns to the eye,laser parameters to induce choroidal neovascu展开更多
背景:如何募集内源性种子细胞促进成骨,为细胞提供适宜的骨再生微环境并保证新生骨血管化进程,是骨组织工程研究的难点。目的:综述多级微管结构骨支架载体促进成骨、成血管的作用。方法:由第一作者检索中国知网、万方、PubMed、Web of S...背景:如何募集内源性种子细胞促进成骨,为细胞提供适宜的骨再生微环境并保证新生骨血管化进程,是骨组织工程研究的难点。目的:综述多级微管结构骨支架载体促进成骨、成血管的作用。方法:由第一作者检索中国知网、万方、PubMed、Web of Science数据库1950至2020年有关多级微管结构骨支架载体促进成骨、成血管作用的文献,检索词为"多级微管结构、骨形成、血管生成;Hierarchical microchanneled scaffolds、osteogenesis、angiogenesis"。最终选取符合纳入标准的文献共计52篇。结果与结论:多级微管结构骨支架载体有良好的促进成骨、成血管作用,在骨组织工程中有较好的应用前景。目前多级微管结构骨支架载体在骨组织工程理论上比较成熟,体外实验证实了多级微管结构能较好地促进间充质干细胞黏附并可分化为成骨细胞系,但是体内实验成骨效果仍然欠佳,在成骨效果上仍然具有进一步提高的可能。将来的研究重点可能应该放在构建多级微管结构复合物,如载趋化因子或细胞因子可进一步提高体内实验的成骨效率。展开更多
Ischemic and neovascular disease is one of the most difficult ocular diseases to deal with nowadays.Redundancy,poor visual acuity and decreased life quality are bothering patients and ophthalmologists for decades.Afte...Ischemic and neovascular disease is one of the most difficult ocular diseases to deal with nowadays.Redundancy,poor visual acuity and decreased life quality are bothering patients and ophthalmologists for decades.After vascular endothelial growth factor(VEGF)was found to be a primary factor in promoting retinal angiogenesis,intravitreal injection of anti-VEGF drugs has been the firstline treatment.Whereas,some patients are refractory to this therapy and problems of economic burden,local complications and adverse effects promote researches into other possible targets.The vasohibin(VASH)family is a newly-investigated factor in modulating ocular angiogenesis.The family includes VASH1 and VASH2,which show opposite effects of inhibiting and accelerating angiogenesis respectively.Positive results have been reported in cellular and animal experiments.With further researches,it can be a promising future target of treating ocular neovascular diseases.展开更多
OBJECTIVE:To investigate the efficacy of Lichong decoction(LD)from Traditional Chinese Medicine,on micro-angiogenesis in a mouse model of hysteromyoma.METHODS:A mouse model of hysteromyoma was developed by orthotopic ...OBJECTIVE:To investigate the efficacy of Lichong decoction(LD)from Traditional Chinese Medicine,on micro-angiogenesis in a mouse model of hysteromyoma.METHODS:A mouse model of hysteromyoma was developed by orthotopic intrauterine injection of primary human myoma cells isolated from patients from the Beijing Obstetrics and Gynecology Hospital into CB-17 Scid mice.Mice were administered high-dose LD,low-dose LD,mifepristone or water(control)daily by gavage for 4 weeks.Uterine diameter and coefficient(uterine weight/body weight)were measured.Uterine morphology was assessed by light microscopy(hematoxylin and eosin)and transmission electron microscopy.Serum levels of estradiol,progesterone,follicle-stimulating hormone and luteinizing hormone(LH)were measured by enzyme-linked immunosorbent assay.Uterine protein expression of hypoxia inducible factor(HIF)-1α,CD31 and proliferating cell nuclear antigen(PCNA)was detected by immunohistochemistry.VEGF and HIF-1αm RNAs were quantified by RT-PCR.RESULTS:High-dose LD,low-dose LD and mifepristone reduced uterine diameter and coefficient,and attenuated the morphologic abnormalities associated with hysteromyoma.High-dose LD,low-dose LD and mifepristone inhibited hysteromyoma-induced micro-angiogenesis,as evidenced by a decrease in the number of new microvessels co-immunostaining for CD31 and PCNA(P<0.01).High-dose LD and mifepristone lowered serum levels of estradiol,progesterone and LH(P<0.05).High-dose LD,low-dose LD and mifepristone down-regulated HIF-1αm RNA and protein expressions and VEGF m RNA expression(P<0.01).CONCLUSION:The inhibition of hysteromyoma by LD may involve reductions in HIF-1αand VEGF expression and suppression of micro-angiogenesis.展开更多
Choroidal neovascularization(CNV) is a leading cause of visual loss in age-related macular degeneration(AMD). However, the molecular mechanism for CNV progression is still unclear. This study aimed to identify CNV-rel...Choroidal neovascularization(CNV) is a leading cause of visual loss in age-related macular degeneration(AMD). However, the molecular mechanism for CNV progression is still unclear. This study aimed to identify CNV-related circular RNAs(circRNAs), a novel class of non-coding RNAs with diverse functions. A total of 117 circRNAs were differentially expressed in the murine CNV model by microarrays. Gene ontology(GO)enrichment and Kyoto Encyclopedia of Genes and Genomes(KEGG) analysis were performed to identify the functions of selected circRNAs. The host genes of these circRNAs were predicted to be targeted to neurogenesis(ontology: biological process), proteinaceous extracellular matrix(ECM)(ontology: cellular component), and binding(ontology: molecular function). Differentially expressed circRNAs-mediated regulatory networks were enriched in ECM receptor interaction. Most of the dysregulated circRNAs could potentially bind to five different mi RNAs by Target Scan and mi Randa. Specifically, circ_15752 was identified in this circRNAs pool which may facilitate vascular endothelial cell proliferation, migration, and tube formation, suggesting a critical role in endothelial angiogenesis. Our work suggests that dysregulated circRNAs may be involved in CNV pathogenesis and serve as potential biomarkers for CNV.展开更多
Dear Editor,I am Dr.Shan-Shan Li,from Northern Jiangsu People’s Hospital,Yangzhou,China.I write to present the case of formation of choroidal neovascularization(CNV)under the fovea after high-power laser irradiation....Dear Editor,I am Dr.Shan-Shan Li,from Northern Jiangsu People’s Hospital,Yangzhou,China.I write to present the case of formation of choroidal neovascularization(CNV)under the fovea after high-power laser irradiation.Currently,there is an increasing availability and accessibility to laser instruments,but improper use of these tools can lead to macular damage and irreversible visual impairment.展开更多
[目的]明确痰瘀同治方对心肌缺血区和动脉粥样硬化(atherosclerosis,AS)斑块内血管新生的双向调节作用,探讨自噬在其中的调控机制。[方法]选取载脂蛋白E基因敲除(Apolipoprotein E gene knockout,ApoE-/-)小鼠20只,随机分为模型对照组...[目的]明确痰瘀同治方对心肌缺血区和动脉粥样硬化(atherosclerosis,AS)斑块内血管新生的双向调节作用,探讨自噬在其中的调控机制。[方法]选取载脂蛋白E基因敲除(Apolipoprotein E gene knockout,ApoE-/-)小鼠20只,随机分为模型对照组和痰瘀同治(Tanyu Tongzhi,TYTZ)组,每组10只,饲喂高脂饲料;另取C57BL/6J小鼠10只为正常对照组,饲喂基础饲料。饲喂4周后,模型对照组和TYTZ组皮下注射异丙肾上腺素针100mg/kg,连续2d,正常对照组皮下注射等量0.9%氯化钠注射液。造模成功后4周,TYTZ组给予TYTZ方流浸膏2145mg/(kg·d),以蒸馏水稀释成0.4mL灌胃,模型对照组和正常对照组给予等量蒸馏水灌胃。给药6周后,用CD31免疫组化染色观察心肌缺血区和主动脉的新生血管密度。Western blot检测心肌组织和主动脉微管相关蛋白1轻链3(microtubule-associated protein 1 light chain 3,LC3)Ⅱ/Ⅰ蛋白表达。[结果]免疫组化染色结果显示,模型对照组心肌组织和主动脉组织CD31表达均显著高于正常对照组(P<0.05);TYTZ组心肌组织CD31表达明显高于模型对照组(P<0.05),而主动脉组织CD31表达则明显低于模型对照组(P<0.05)。Western blot结果显示,模型对照组心肌组织和主动脉组织LC3Ⅱ/Ⅰ蛋白表达水平均明显高于正常对照组(P<0.05);TYTZ组心肌组织LC3Ⅱ/Ⅰ蛋白表达水平显著高于模型对照组(P<0.05),而主动脉组织LC3Ⅱ/Ⅰ蛋白表达则明显低于模型对照组(P<0.05)。[结论]TYTZ方在抑制AS斑块内血管新生的同时能够促进心肌缺血区的血管新生,该方对自噬水平的双向调节作用可能是其中的调控机制。展开更多
文摘Choroidal neovascularization characterizes wet age-related macular degeneration.Choroidal neovascularization formation involves a primarily angiogenic process that is combined with both inflammation and proteolysis.A primary cause of choroidal neovascularization pathogenesis is alterations in pro-and anti-angiogenic factors derived from the retinal pigment epithelium,with vascular endothelium growth factor being mainly responsible for both clinical and experimental choroidal neovascularization.MicroRNAs(miRNAs)which are short,non-coding,endogenous RNA molecules have a major role in regulating various pathological processes,including inflammation and angiogenesis.A review of recent studies with the mouse laser-induced choroidal neovascularization model has shown alterations in miRNA expression in choroidal neovascularization tissues and could be potential therapeutic targets for wet age-related macular degeneration.Upregulation of miR-505(days 1 and 3 post-laser),miR-155(day 14)occurred in retina;miR-342-5p(days 3 and 7),miR-126-3p(day 14)in choroid;miR-23a,miR-24,miR-27a(day 7)in retina/choroid;miR-505(days 1 and 3)in retinal pigment epithelium/choroid;downregulation of miR-155(days 1 and 3),miR-29a,miR-29b,miR-29c(day 5),miR-93(day 14),miR-126(day 14)occurred in retinal pigment epithelium/choroid.Therapies using miRNA mimics or inhibitors were found to decrease choroidal neovascularization lesions.Choroidal neovascularization development was reduced by overexpression of miR-155,miR-188-5p,miR-(5,B,7),miR-126-3p,miR-342-5p,miR-93,miR-126,miR-195a-3p,miR-24,miR-21,miR-31,miR-150,and miR-184,or suppression of miR-505,miR-126-3p,miR-155,and miR-23/27.Further studies are warranted to determine miRNA expression in mouse laser-induced choroidal neovascularization models in order to validate and extend the reported findings.Important experimental variables need to be standardized;these include the strain and age of animals,gender,number and position of laser burns to the eye,laser parameters to induce choroidal neovascu
文摘背景:如何募集内源性种子细胞促进成骨,为细胞提供适宜的骨再生微环境并保证新生骨血管化进程,是骨组织工程研究的难点。目的:综述多级微管结构骨支架载体促进成骨、成血管的作用。方法:由第一作者检索中国知网、万方、PubMed、Web of Science数据库1950至2020年有关多级微管结构骨支架载体促进成骨、成血管作用的文献,检索词为"多级微管结构、骨形成、血管生成;Hierarchical microchanneled scaffolds、osteogenesis、angiogenesis"。最终选取符合纳入标准的文献共计52篇。结果与结论:多级微管结构骨支架载体有良好的促进成骨、成血管作用,在骨组织工程中有较好的应用前景。目前多级微管结构骨支架载体在骨组织工程理论上比较成熟,体外实验证实了多级微管结构能较好地促进间充质干细胞黏附并可分化为成骨细胞系,但是体内实验成骨效果仍然欠佳,在成骨效果上仍然具有进一步提高的可能。将来的研究重点可能应该放在构建多级微管结构复合物,如载趋化因子或细胞因子可进一步提高体内实验的成骨效率。
基金Supported by Natural Science Fund Project in Jiangsu Province(No.BK20180380)Nanjing Health Commission(No.YKK18260)。
文摘Ischemic and neovascular disease is one of the most difficult ocular diseases to deal with nowadays.Redundancy,poor visual acuity and decreased life quality are bothering patients and ophthalmologists for decades.After vascular endothelial growth factor(VEGF)was found to be a primary factor in promoting retinal angiogenesis,intravitreal injection of anti-VEGF drugs has been the firstline treatment.Whereas,some patients are refractory to this therapy and problems of economic burden,local complications and adverse effects promote researches into other possible targets.The vasohibin(VASH)family is a newly-investigated factor in modulating ocular angiogenesis.The family includes VASH1 and VASH2,which show opposite effects of inhibiting and accelerating angiogenesis respectively.Positive results have been reported in cellular and animal experiments.With further researches,it can be a promising future target of treating ocular neovascular diseases.
基金Supported by the National Natural Science Foundation of China(to Study the Effect and Molecular Mechanism of Lichong Decoction in Inhibiting Immune Escape of Hysteromyoma Through IDO Mediated Immune Editing Pathway,No.81774072Based on Angiogenesis Microenvironment to Explore the Mechanism of Lichong Decoction in Inhibiting Hysteromyoma by Regulating Ang/Tie-2 Signal Transduction Pathway,No.81373812+2 种基金Objective to Explore the Regulatory Mechanism of Extracellular Matrix Metabolism of Fuzheng Quyu Traditional Chinese Medicine on the Inhibition of Hysteromyoma,No.81073096)Beijing Municipal Natural Science Foundation(Effect of Lichong Decoction on Balance Drift of Angiogenesis/Inhibitor of Hysteromyoma Based on Lnc RNA Signal Pathway,7202015)Inheritance and Innovation of Traditional Chinese Medicine"Hundred,Thousand and Ten Thousand"Talent Project(Qihuang Project)the Fourth Batch of National Research and Training Project of Chinese Medicine Talents(TCM Education And Development 2017 No.24)。
文摘OBJECTIVE:To investigate the efficacy of Lichong decoction(LD)from Traditional Chinese Medicine,on micro-angiogenesis in a mouse model of hysteromyoma.METHODS:A mouse model of hysteromyoma was developed by orthotopic intrauterine injection of primary human myoma cells isolated from patients from the Beijing Obstetrics and Gynecology Hospital into CB-17 Scid mice.Mice were administered high-dose LD,low-dose LD,mifepristone or water(control)daily by gavage for 4 weeks.Uterine diameter and coefficient(uterine weight/body weight)were measured.Uterine morphology was assessed by light microscopy(hematoxylin and eosin)and transmission electron microscopy.Serum levels of estradiol,progesterone,follicle-stimulating hormone and luteinizing hormone(LH)were measured by enzyme-linked immunosorbent assay.Uterine protein expression of hypoxia inducible factor(HIF)-1α,CD31 and proliferating cell nuclear antigen(PCNA)was detected by immunohistochemistry.VEGF and HIF-1αm RNAs were quantified by RT-PCR.RESULTS:High-dose LD,low-dose LD and mifepristone reduced uterine diameter and coefficient,and attenuated the morphologic abnormalities associated with hysteromyoma.High-dose LD,low-dose LD and mifepristone inhibited hysteromyoma-induced micro-angiogenesis,as evidenced by a decrease in the number of new microvessels co-immunostaining for CD31 and PCNA(P<0.01).High-dose LD and mifepristone lowered serum levels of estradiol,progesterone and LH(P<0.05).High-dose LD,low-dose LD and mifepristone down-regulated HIF-1αm RNA and protein expressions and VEGF m RNA expression(P<0.01).CONCLUSION:The inhibition of hysteromyoma by LD may involve reductions in HIF-1αand VEGF expression and suppression of micro-angiogenesis.
基金supported by the National Natural Science Foundation of China(No.81525006,81670864,and 81730025 to C.Z.)the Non-profit Central Research Institute Fund of Chinese Academy of Medical Sciences(No.2018PT32019 to C.Z.)。
文摘Choroidal neovascularization(CNV) is a leading cause of visual loss in age-related macular degeneration(AMD). However, the molecular mechanism for CNV progression is still unclear. This study aimed to identify CNV-related circular RNAs(circRNAs), a novel class of non-coding RNAs with diverse functions. A total of 117 circRNAs were differentially expressed in the murine CNV model by microarrays. Gene ontology(GO)enrichment and Kyoto Encyclopedia of Genes and Genomes(KEGG) analysis were performed to identify the functions of selected circRNAs. The host genes of these circRNAs were predicted to be targeted to neurogenesis(ontology: biological process), proteinaceous extracellular matrix(ECM)(ontology: cellular component), and binding(ontology: molecular function). Differentially expressed circRNAs-mediated regulatory networks were enriched in ECM receptor interaction. Most of the dysregulated circRNAs could potentially bind to five different mi RNAs by Target Scan and mi Randa. Specifically, circ_15752 was identified in this circRNAs pool which may facilitate vascular endothelial cell proliferation, migration, and tube formation, suggesting a critical role in endothelial angiogenesis. Our work suggests that dysregulated circRNAs may be involved in CNV pathogenesis and serve as potential biomarkers for CNV.
文摘Dear Editor,I am Dr.Shan-Shan Li,from Northern Jiangsu People’s Hospital,Yangzhou,China.I write to present the case of formation of choroidal neovascularization(CNV)under the fovea after high-power laser irradiation.Currently,there is an increasing availability and accessibility to laser instruments,but improper use of these tools can lead to macular damage and irreversible visual impairment.