目的:探讨microRNA-29c对人胰腺癌细胞(As PC-1、Bx PC-3、PANC-1、MIA Pa Ca-2)生物学特性的影响。方法:培养1种人正常胰腺上皮细胞(HPDE)及4种人胰腺癌细胞(As PC-1、Bx PC-3、PANC-1、MIA Pa Ca-2),采用real-time PCR法观察5种细胞系...目的:探讨microRNA-29c对人胰腺癌细胞(As PC-1、Bx PC-3、PANC-1、MIA Pa Ca-2)生物学特性的影响。方法:培养1种人正常胰腺上皮细胞(HPDE)及4种人胰腺癌细胞(As PC-1、Bx PC-3、PANC-1、MIA Pa Ca-2),采用real-time PCR法观察5种细胞系中microRNA-29c的表达差异,以microRNA-29c过表达腺病毒感染的PANC-1和MIA Pa Ca2细胞作为实验组,以空载体感染的PANC-1和MIA Pa Ca2细胞作为阴性对照组,采用细胞划痕实验、Transwell法检测两组细胞体外侵袭能力,Western blot检测两组细胞上皮间充质转化(EMT)相关蛋白波形蛋白(Vimentin)及E-钙粘蛋白(E-cadherin)的表达。结果:real-time-PCR显示各胰腺癌细胞系中microRNA-29c水平明显低于正常胰腺细胞系(P<0.05),细胞划痕实验发现感染腺病毒48 h后实验组PANC-1、MIA Pa Ca-2细胞的迁移距离明显短于阴性对照组(P<0.05),Transwell小室细胞侵袭实验发现实验组PANC-1和MIA Pa Ca-2细胞侵袭数量明显低于阴性对照组(P<0.05);Western blot蛋白免疫印迹结果显示PANC-1和MIA Pa Ca-2细胞过表达microRNA-29c后,Vimentin表达减少,E-cadherin表达增加。结论:microRNA-29c的过表达可有效抑制胰腺癌细胞的体外侵袭与转移,可能与Vimentin表达减少,E-cadherin表达增加有关,有望成为胰腺癌生物治疗的潜在靶点。展开更多
AIM： To determine the role of microRNA （miRNA）-29a and miRNA-29c in the regulation of apoptosis in early rat diabetic cataract formation.METHODS： Streptozotocin （STZ）-induced diabetic Sprague-Dawley （SD） rats ...AIM： To determine the role of microRNA （miRNA）-29a and miRNA-29c in the regulation of apoptosis in early rat diabetic cataract formation.METHODS： Streptozotocin （STZ）-induced diabetic Sprague-Dawley （SD） rats were used in the study. The expression level of miRNA-29a, miRNA-29c, and BCL2-modifying factor （BMF） in lens epithelial cells （LECs） samples were measured using quantitative real-time polymerase chain reaction. Prediction algorithms of miRanda, TargetScan 6.2, and mirRDB to perform a miRNA gene network analysis were used for the potential miRNA-29a and miRNA-29c targets. RESULTS： The miRNA-29a and miRNA-29c expression levels were all significantly lower in the control group compared to the 2 and 4wk diabetic samples （P〈0.01）. The network analysis indicated that one miRNA-29a and miRNA-29c targets was BMF. There was significantly higher expression of BMF mRNA compared to the normal controls （P〈0.01）. CONCLUSION： Apoptosis occurs in rat LECs following high blood glucose exposure. It is likely that apoptosis during diabetic cataract formation involves the decreased expression of miRNA-29a and miRNA-29c and the increased expression of BMF.展开更多
BACKGROUND Knee osteoarthritis(KOA)is a common orthopedic condition with an uncertain etiology,possibly involving genetics and biomechanics.Factors like changes in chondrocyte microenvironment,oxidative stress,inflamm...BACKGROUND Knee osteoarthritis(KOA)is a common orthopedic condition with an uncertain etiology,possibly involving genetics and biomechanics.Factors like changes in chondrocyte microenvironment,oxidative stress,inflammation,and immune responses affect KOA development.Early-stage treatment options primarily target symptom relief.Mesenchymal stem cells(MSCs)show promise for treatment,despite challenges.Recent research highlights microRNAs(miRNAs)within MSC-released extracellular vesicles that can potentially promote cartilage regeneration and hinder KOA progression.This suggests exosomes(Exos)as a promising avenue for future treatment.While these findings emphasize the need for effective KOA progression management,further safety and efficacy validation for Exos is essential.AIM To explore miR-29a’s role in KOA,we’ll create miR-29a-loaded vesicles,testing for early treatment in rat models.METHODS Extraction of bone marrow MSC-derived extracellular vesicles,preparation of engineered vesicles loaded with miR-29a using ultrasonication,and identification using quantitative reverse transcription polymerase chain reaction;after establi-shing a rat model of KOA,rats were randomly divided into three groups:Blank control group injected with saline,normal extracellular vesicle group injected with normal extracellular vesicle suspension,and engineered extrace-llular vesicle group injected with engineered extracellular vesicle suspension.The three groups evaluation,histological detection,and immunohistochemical detection to compare and evaluate the progress of various forms of arthritis.RESULTS General behavioral observation results showed that the extracellular vesicle group and engineered extracellular vesicle group had better performance in all four indicators of pain,gait,joint mobility,and swelling compared to the blank control group.Additionally,the engineered extracellular vesicle group had better pain relief at 4 wk and better knee joint mobility at 8 wk compared to the normal extracellular vesicle group.Imaging examination results showed that the blank control group had the fastest progression of arthritis,the normal extracellular vesicle group had a relatively slower progression,and the engineered extracellular vesicle group had the slowest progression.Gross histological observation results showed that the blank control group had the most obvious signs of arthritis,the normal extracellular vesicle group showed signs of arthritis,and the engineered extracellular vesicle group showed no significant signs of arthritis.Using the Pelletier gross score evaluation,the engineered extracellular vesicle group had the slowest progression of arthritis.Results from two types of staining showed that the articular cartilage of rats in the normal extracellular vesicle and engineered extracellular vesicle groups was significantly better than that of the blank control group,and the engineered extracellular vesicle group had the best cartilage cell and joint surface condition.Immunohistochemical detection of type II collagen and proteoglycan showed that the extracellular matrix of cartilage cells in the normal extracellular vesicle and engineered extracellular vesicle groups was better than that of the blank control group.Compared to the normal extracellular vesicle group,the engineered extracellular vesicle group had a better regulatory effect on the extracellular matrix of cartilage cells.CONCLUSION Engineered Exos loaded with miR-29a can exert anti-inflammatory effects and maintain extracellular matrix stability,thereby protecting articular cartilage,and slowing the progression of KOA.展开更多
文摘目的:探讨microRNA-29c对人胰腺癌细胞(As PC-1、Bx PC-3、PANC-1、MIA Pa Ca-2)生物学特性的影响。方法:培养1种人正常胰腺上皮细胞(HPDE)及4种人胰腺癌细胞(As PC-1、Bx PC-3、PANC-1、MIA Pa Ca-2),采用real-time PCR法观察5种细胞系中microRNA-29c的表达差异,以microRNA-29c过表达腺病毒感染的PANC-1和MIA Pa Ca2细胞作为实验组,以空载体感染的PANC-1和MIA Pa Ca2细胞作为阴性对照组,采用细胞划痕实验、Transwell法检测两组细胞体外侵袭能力,Western blot检测两组细胞上皮间充质转化(EMT)相关蛋白波形蛋白(Vimentin)及E-钙粘蛋白(E-cadherin)的表达。结果:real-time-PCR显示各胰腺癌细胞系中microRNA-29c水平明显低于正常胰腺细胞系(P<0.05),细胞划痕实验发现感染腺病毒48 h后实验组PANC-1、MIA Pa Ca-2细胞的迁移距离明显短于阴性对照组(P<0.05),Transwell小室细胞侵袭实验发现实验组PANC-1和MIA Pa Ca-2细胞侵袭数量明显低于阴性对照组(P<0.05);Western blot蛋白免疫印迹结果显示PANC-1和MIA Pa Ca-2细胞过表达microRNA-29c后,Vimentin表达减少,E-cadherin表达增加。结论:microRNA-29c的过表达可有效抑制胰腺癌细胞的体外侵袭与转移,可能与Vimentin表达减少,E-cadherin表达增加有关,有望成为胰腺癌生物治疗的潜在靶点。
文摘AIM： To determine the role of microRNA （miRNA）-29a and miRNA-29c in the regulation of apoptosis in early rat diabetic cataract formation.METHODS： Streptozotocin （STZ）-induced diabetic Sprague-Dawley （SD） rats were used in the study. The expression level of miRNA-29a, miRNA-29c, and BCL2-modifying factor （BMF） in lens epithelial cells （LECs） samples were measured using quantitative real-time polymerase chain reaction. Prediction algorithms of miRanda, TargetScan 6.2, and mirRDB to perform a miRNA gene network analysis were used for the potential miRNA-29a and miRNA-29c targets. RESULTS： The miRNA-29a and miRNA-29c expression levels were all significantly lower in the control group compared to the 2 and 4wk diabetic samples （P〈0.01）. The network analysis indicated that one miRNA-29a and miRNA-29c targets was BMF. There was significantly higher expression of BMF mRNA compared to the normal controls （P〈0.01）. CONCLUSION： Apoptosis occurs in rat LECs following high blood glucose exposure. It is likely that apoptosis during diabetic cataract formation involves the decreased expression of miRNA-29a and miRNA-29c and the increased expression of BMF.
基金Project of the National Natural Science Foundation of China,No.82172398Key Research Project of the Department of Education of Liaoning Province,No.LJKZZ20220148+1 种基金Dalian Medical Science Research Project,No.2111038Dalian Dengfeng Plan Medical Key Specialty Construction Project(2021),No.243.
文摘BACKGROUND Knee osteoarthritis(KOA)is a common orthopedic condition with an uncertain etiology,possibly involving genetics and biomechanics.Factors like changes in chondrocyte microenvironment,oxidative stress,inflammation,and immune responses affect KOA development.Early-stage treatment options primarily target symptom relief.Mesenchymal stem cells(MSCs)show promise for treatment,despite challenges.Recent research highlights microRNAs(miRNAs)within MSC-released extracellular vesicles that can potentially promote cartilage regeneration and hinder KOA progression.This suggests exosomes(Exos)as a promising avenue for future treatment.While these findings emphasize the need for effective KOA progression management,further safety and efficacy validation for Exos is essential.AIM To explore miR-29a’s role in KOA,we’ll create miR-29a-loaded vesicles,testing for early treatment in rat models.METHODS Extraction of bone marrow MSC-derived extracellular vesicles,preparation of engineered vesicles loaded with miR-29a using ultrasonication,and identification using quantitative reverse transcription polymerase chain reaction;after establi-shing a rat model of KOA,rats were randomly divided into three groups:Blank control group injected with saline,normal extracellular vesicle group injected with normal extracellular vesicle suspension,and engineered extrace-llular vesicle group injected with engineered extracellular vesicle suspension.The three groups evaluation,histological detection,and immunohistochemical detection to compare and evaluate the progress of various forms of arthritis.RESULTS General behavioral observation results showed that the extracellular vesicle group and engineered extracellular vesicle group had better performance in all four indicators of pain,gait,joint mobility,and swelling compared to the blank control group.Additionally,the engineered extracellular vesicle group had better pain relief at 4 wk and better knee joint mobility at 8 wk compared to the normal extracellular vesicle group.Imaging examination results showed that the blank control group had the fastest progression of arthritis,the normal extracellular vesicle group had a relatively slower progression,and the engineered extracellular vesicle group had the slowest progression.Gross histological observation results showed that the blank control group had the most obvious signs of arthritis,the normal extracellular vesicle group showed signs of arthritis,and the engineered extracellular vesicle group showed no significant signs of arthritis.Using the Pelletier gross score evaluation,the engineered extracellular vesicle group had the slowest progression of arthritis.Results from two types of staining showed that the articular cartilage of rats in the normal extracellular vesicle and engineered extracellular vesicle groups was significantly better than that of the blank control group,and the engineered extracellular vesicle group had the best cartilage cell and joint surface condition.Immunohistochemical detection of type II collagen and proteoglycan showed that the extracellular matrix of cartilage cells in the normal extracellular vesicle and engineered extracellular vesicle groups was better than that of the blank control group.Compared to the normal extracellular vesicle group,the engineered extracellular vesicle group had a better regulatory effect on the extracellular matrix of cartilage cells.CONCLUSION Engineered Exos loaded with miR-29a can exert anti-inflammatory effects and maintain extracellular matrix stability,thereby protecting articular cartilage,and slowing the progression of KOA.
