Article(id=1322922713702085277, tenantId=1146029695717560320, journalId=1255847919539208197, issueId=1322922680609014711, articleNumber=null, orderNo=null, doi=10.13193/j.issn.1673-7717.2025.02.005, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=null, receivedDateStr=null, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793338953661, onlineDateStr=2026-10-30, pubDate=1739116800000, pubDateStr=2025-02-10, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793338953661, onlineIssueDateStr=2026-10-30, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793338953661, creator=13701087609, updateTime=1793338953661, updator=13701087609, issue=Issue{id=1322922680609014711, tenantId=1146029695717560320, journalId=1255847919539208197, year='2025', volume='43', issue='2', pageStart='1', pageEnd='258', issueExtLink='null', onlineDate='null', pubDate='1739116800000', pubDateStr='2025-02-10', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1793338945772, creator='13701087609', updateTime=1793340618065, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322929694785536732, tenantId=1146029695717560320, journalId=1255847919539208197, issueId=1322922680609014711, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322929694785536733, tenantId=1146029695717560320, journalId=1255847919539208197, issueId=1322922680609014711, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=25, endPage=28, ext={EN=ArticleExt(id=1322922713895023262, articleId=1322922713702085277, tenantId=1146029695717560320, journalId=1255847919539208197, language=EN, title=Exploring Mechanism of Tripterygium Wilfordii Polysaccharides Inducing Pancreatic Stem Cell Differentiation Based on SDF-1/CXCR4 Axis, columnId=1256183361521967297, journalTitle=Chinese Archives of Traditional Chinese Medicine, columnName=Target on National Project, runingTitle=null, highlight=null, articleAbstract=
Objective

To investigate the mechanism of Tripterygium wilfordii polysaccharides inducing pancreatic stem cell differentiation through stromal cell-derived factor-1(SDF-1)/CXC chemokine receptor-4(CXCR4)axis.

Methods

Primary pancreatic stem cells were prepared from pancreatic tissue from Kunming mice on day 4 of neonatal birth. The immunohistochemistry method was used to identify the pancreatic stem cells. Isletβcells were identified by dithiazone(DTZ)staining. An inverted fluorescence microscope was used to photograph and record the cells at various cultivation time points. The release of SDF-1 from cells were detected at various administration time points by using enzyme-linked immunosorbent assay(ELISA). The relative mRNA expression levels of SDF-1 and CXCR4 in each group were detected by real-time fluorescence quantitative PCR(qPCR)technology. The expression levels of SDF-1 and CXCR4 proteins in each group were detected by Western blot assay(WB).

Results

The cells obtained was Nestin positive and Brownish-yellow were identified by immunohistochemistry method. DTZ staining was positive,and the number of positive stained cells in the treatment group was significantly higher than that in the control group(P<0.05). The release of SDF-1 from the control group cells remained relatively stable,while the release of SDF-1 from the experimental group cells gradually increased over time and reached its peak on the 26th day. Subsequently,the release of SDF-1 gradually decreased over time. The relative mRNA expression levels of SDF-1 and CXCR4 in the experimental group cells were significantly higher than those in the control group cells detected by qPCR technology(P<0.05). The ex-pression levels of SDF-1 and CXCR4 proteins in the experimental group cells were significantly higher than those in the control group cells by WB(P<0.05).

Conclusion

Tripterygium wilfordii polysaccharides can induce pancreatic stem cell differentiation through the SDF-1/CXCR4 axis.

, authors=Wei JIA, Zhiying NING, Yanhui CEN, Xin LIU, Rui YANG, Bojia LI, Sen LI, Chenkang ZHANG, authorsList=Wei JIA, Zhiying NING, Yanhui CEN, Xin LIU, Rui YANG, Bojia LI, Sen LI, Chenkang ZHANG, authorCompany=null, correspAuthors=Yanhui CEN, Xin LIU, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1322922718030607027, articleId=1322922713702085277, tenantId=1146029695717560320, journalId=1255847919539208197, language=CN, title=基于SDF-1/CXCR4轴探讨雷公藤多糖诱导胰腺干细胞分化的机制研究, columnId=1256183362172142382, journalTitle=中华中医药学刊, columnName=国家项目点击, runingTitle=null, highlight=null, articleAbstract=
目的

探究雷公藤多糖通过基质细胞衍生因子-1(SDF-1)/CXC型趋化因子受体4(CXCR4)轴诱导胰腺干细胞分化的机制。

方法

取新生第4天昆明小鼠的胰腺组织制备原代胰腺干细胞,使用免疫组化法鉴定胰腺干细胞;使用双硫腙(DTZ)染色法鉴定胰岛β细胞;使用倒置荧光显微镜对各培养时间点细胞进行拍照记录;使用酶联免疫吸附(ELISA)法检测细胞各给药时间点SDF-1释放量;使用实时荧光定量PCR(qPCR)技术检测各组细胞SDF-1和CXCR4的相对mRNA表达量;使用蛋白免疫印迹试验(WB)检测各组细胞SDF-1和CXCR4蛋白表达量。

结果

使用免疫组化法鉴定所取细胞Nestin阳性、呈棕黄色;双硫腙(DTZ)染色呈阳性,且给药组细胞阳性染色细胞数量明显高于对照组细胞(P<0.05);对照组细胞SDF-1释放量相对持平,实验组细胞SDF-1释放量随着时间的迁移逐步上升,在第26天达到峰值,随后SDF-1释放量随着时间的迁移逐步下降;qPCR技术检测显示实验组细胞SDF-1和CXCR4的相对mRNA表达量显著高于对照组细胞(P<0.05);WB检测结果显示实验组细胞SDF-1和CXCR4蛋白表达量显著高于对照组细胞(P<0.05)。

结论

雷公藤多糖可以通过SDF-1/CXCR4轴诱导胰腺干细胞分化。

, authors=贾微, 宁志莹, 岑妍慧, 刘鑫, 杨瑞, 李博佳, 李森, 张宸康, authorsList=贾微, 宁志莹, 岑妍慧, 刘鑫, 杨瑞, 李博佳, 李森, 张宸康, authorCompany=null, correspAuthors=岑妍慧, 刘鑫, authorNote=

贾微(1982-),男,辽宁沈阳人,教授,硕士,研究方向:中草药防治相关疾病的应用基础及症候研究。

, correspAuthorsNote=
岑妍慧(1980),女,广西北海人,教授,博士,研究方向:中草药防治相关疾病的应用基础。
刘鑫(1993-),女,河北石家庄人,硕士研究生,研究方向:中草药防治相关疾病的应用基础。E-mail:。
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贾微(1982-),男,辽宁沈阳人,教授,硕士,研究方向:中草药防治相关疾病的应用基础及症候研究。

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贾微(1982-),男,辽宁沈阳人,教授,硕士,研究方向:中草药防治相关疾病的应用基础及症候研究。

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注:对照组:a1:培养2 d、b1:培养4 d、c1:培养6 d、d1:培养8 d、e1:培养10 d;实验组:a2:培养2 d、b2:培养4 d、c2:培养6 d、d2:培养8 d、e2:培养10 d。

, figureFileSmall=Mvg1MheJIIFeGLmoJn+7dQ==, figureFileBig=qfs6jwEKbGQT+4Xe+l8MkA==, tableContent=null), ArticleFig(id=1322922724984763119, tenantId=1146029695717560320, journalId=1255847919539208197, articleId=1322922713702085277, language=EN, label=null, caption=null, figureFileSmall=HZPGeD64ZOsQFMf8h6lAuA==, figureFileBig=5f0cZksZmpYhof54eBoSKg==, tableContent=null), ArticleFig(id=1322922725060260592, tenantId=1146029695717560320, journalId=1255847919539208197, articleId=1322922713702085277, language=CN, label=图5, caption=SDF-1释放量, figureFileSmall=HZPGeD64ZOsQFMf8h6lAuA==, figureFileBig=5f0cZksZmpYhof54eBoSKg==, tableContent=null), ArticleFig(id=1322922725173506801, tenantId=1146029695717560320, journalId=1255847919539208197, articleId=1322922713702085277, language=EN, label=null, caption=null, figureFileSmall=Ln8Yu0bjAFLfwPqjbBQYug==, figureFileBig=aRpn9AIpuqG0/mPuwOe2fQ==, tableContent=null), ArticleFig(id=1322922725236421362, tenantId=1146029695717560320, journalId=1255847919539208197, articleId=1322922713702085277, language=CN, label=图6, caption=各组细胞中SDF-1、CXCR4蛋白印迹图, figureFileSmall=Ln8Yu0bjAFLfwPqjbBQYug==, figureFileBig=aRpn9AIpuqG0/mPuwOe2fQ==, tableContent=null), ArticleFig(id=1322922725303530227, tenantId=1146029695717560320, journalId=1255847919539208197, articleId=1322922713702085277, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
基因名称上游引物下游引物
SDF-15'-AATCCTCAACACTCCAAACT-3'5'-CTCTTCTTCTGTCGCTTCT-3'
CXCR45'-GAGACTATGACTCCAACAAGG-3'5'-ATGACCAGGATCACCAAT-3'
GAPDH5'-AGGTTGTCTCCTGCGACTTCA-3'5'-GGGTGGTCCAGGGTTTCTTA-3'
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引物序列

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基因名称上游引物下游引物
SDF-15'-AATCCTCAACACTCCAAACT-3'5'-CTCTTCTTCTGTCGCTTCT-3'
CXCR45'-GAGACTATGACTCCAACAAGG-3'5'-ATGACCAGGATCACCAAT-3'
GAPDH5'-AGGTTGTCTCCTGCGACTTCA-3'5'-GGGTGGTCCAGGGTTTCTTA-3'
), ArticleFig(id=1322922725458719477, tenantId=1146029695717560320, journalId=1255847919539208197, articleId=1322922713702085277, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
组别n SDF-1 mRNACXCR4 mRNA
对照组61.00±0.001.00±0.00
实验组614.15±0.077.19±0.09
), ArticleFig(id=1322922725517439734, tenantId=1146029695717560320, journalId=1255847919539208197, articleId=1322922713702085277, language=CN, label=表2, caption=

各组细胞中SDF-1、CXCR4 mRNA水平的比较(±s)

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组别n SDF-1 mRNACXCR4 mRNA
对照组61.00±0.001.00±0.00
实验组614.15±0.077.19±0.09
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组别nSDF-1(/GAPDH)CXCR4(/GAPDH)
对照组60.49±0.050.55±0.07
实验组61.86±0.071.12±0.09
), ArticleFig(id=1322922725655851768, tenantId=1146029695717560320, journalId=1255847919539208197, articleId=1322922713702085277, language=CN, label=表3, caption=

各组细胞中SDF-1、CXCR4蛋白水平的比较(±s)

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组别nSDF-1(/GAPDH)CXCR4(/GAPDH)
对照组60.49±0.050.55±0.07
实验组61.86±0.071.12±0.09
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基于SDF-1/CXCR4轴探讨雷公藤多糖诱导胰腺干细胞分化的机制研究
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贾微 , 宁志莹 , 岑妍慧 , 刘鑫 , 杨瑞 , 李博佳 , 李森 , 张宸康
中华中医药学刊 | 国家项目点击 2025,43(2): 25-28
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中华中医药学刊 |国家项目点击 2025 , 43 (2) : 25 -28
基于SDF-1/CXCR4轴探讨雷公藤多糖诱导胰腺干细胞分化的机制研究
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贾微(1982-),男,辽宁沈阳人,教授,硕士,研究方向:中草药防治相关疾病的应用基础及症候研究。

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贾微, 宁志莹, 岑妍慧, 刘鑫 , 杨瑞, 李博佳, 李森, 张宸康
作者信息
  • 广西中医药大学,广西 南宁 530023
通讯作者:
岑妍慧(1980),女,广西北海人,教授,博士,研究方向:中草药防治相关疾病的应用基础。
刘鑫(1993-),女,河北石家庄人,硕士研究生,研究方向:中草药防治相关疾病的应用基础。E-mail:。
作者简介:

贾微(1982-),男,辽宁沈阳人,教授,硕士,研究方向:中草药防治相关疾病的应用基础及症候研究。

Exploring Mechanism of Tripterygium Wilfordii Polysaccharides Inducing Pancreatic Stem Cell Differentiation Based on SDF-1/CXCR4 Axis
Wei JIA, Zhiying NING, Yanhui CEN, Xin LIU , Rui YANG, Bojia LI, Sen LI, Chenkang ZHANG
Affiliations
  • Guangxi University of Chinese Medicine,Nanning 530023,Guangxi,China
出版时间: 2025-02-10 doi: 10.13193/j.issn.1673-7717.2025.02.005
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目的

探究雷公藤多糖通过基质细胞衍生因子-1(SDF-1)/CXC型趋化因子受体4(CXCR4)轴诱导胰腺干细胞分化的机制。

方法

取新生第4天昆明小鼠的胰腺组织制备原代胰腺干细胞,使用免疫组化法鉴定胰腺干细胞;使用双硫腙(DTZ)染色法鉴定胰岛β细胞;使用倒置荧光显微镜对各培养时间点细胞进行拍照记录;使用酶联免疫吸附(ELISA)法检测细胞各给药时间点SDF-1释放量;使用实时荧光定量PCR(qPCR)技术检测各组细胞SDF-1和CXCR4的相对mRNA表达量;使用蛋白免疫印迹试验(WB)检测各组细胞SDF-1和CXCR4蛋白表达量。

结果

使用免疫组化法鉴定所取细胞Nestin阳性、呈棕黄色;双硫腙(DTZ)染色呈阳性,且给药组细胞阳性染色细胞数量明显高于对照组细胞(P<0.05);对照组细胞SDF-1释放量相对持平,实验组细胞SDF-1释放量随着时间的迁移逐步上升,在第26天达到峰值,随后SDF-1释放量随着时间的迁移逐步下降;qPCR技术检测显示实验组细胞SDF-1和CXCR4的相对mRNA表达量显著高于对照组细胞(P<0.05);WB检测结果显示实验组细胞SDF-1和CXCR4蛋白表达量显著高于对照组细胞(P<0.05)。

结论

雷公藤多糖可以通过SDF-1/CXCR4轴诱导胰腺干细胞分化。

雷公藤多糖  /  胰腺干细胞  /  基质细胞衍生因子-1  /  CXC型趋化因子受体4
Objective

To investigate the mechanism of Tripterygium wilfordii polysaccharides inducing pancreatic stem cell differentiation through stromal cell-derived factor-1(SDF-1)/CXC chemokine receptor-4(CXCR4)axis.

Methods

Primary pancreatic stem cells were prepared from pancreatic tissue from Kunming mice on day 4 of neonatal birth. The immunohistochemistry method was used to identify the pancreatic stem cells. Isletβcells were identified by dithiazone(DTZ)staining. An inverted fluorescence microscope was used to photograph and record the cells at various cultivation time points. The release of SDF-1 from cells were detected at various administration time points by using enzyme-linked immunosorbent assay(ELISA). The relative mRNA expression levels of SDF-1 and CXCR4 in each group were detected by real-time fluorescence quantitative PCR(qPCR)technology. The expression levels of SDF-1 and CXCR4 proteins in each group were detected by Western blot assay(WB).

Results

The cells obtained was Nestin positive and Brownish-yellow were identified by immunohistochemistry method. DTZ staining was positive,and the number of positive stained cells in the treatment group was significantly higher than that in the control group(P<0.05). The release of SDF-1 from the control group cells remained relatively stable,while the release of SDF-1 from the experimental group cells gradually increased over time and reached its peak on the 26th day. Subsequently,the release of SDF-1 gradually decreased over time. The relative mRNA expression levels of SDF-1 and CXCR4 in the experimental group cells were significantly higher than those in the control group cells detected by qPCR technology(P<0.05). The ex-pression levels of SDF-1 and CXCR4 proteins in the experimental group cells were significantly higher than those in the control group cells by WB(P<0.05).

Conclusion

Tripterygium wilfordii polysaccharides can induce pancreatic stem cell differentiation through the SDF-1/CXCR4 axis.

Tripterygium wilfordii polysaccharides  /  pancreatic stem cell  /  stromal cell derived factor-1  /  CXC chemokine receptor-4
贾微, 宁志莹, 岑妍慧, 刘鑫, 杨瑞, 李博佳, 李森, 张宸康. 基于SDF-1/CXCR4轴探讨雷公藤多糖诱导胰腺干细胞分化的机制研究. 中华中医药学刊, 2025 , 43 (2) : 25 -28 . DOI: 10.13193/j.issn.1673-7717.2025.02.005
Wei JIA, Zhiying NING, Yanhui CEN, Xin LIU, Rui YANG, Bojia LI, Sen LI, Chenkang ZHANG. Exploring Mechanism of Tripterygium Wilfordii Polysaccharides Inducing Pancreatic Stem Cell Differentiation Based on SDF-1/CXCR4 Axis[J]. Chinese Archives of Traditional Chinese Medicine, 2025 , 43 (2) : 25 -28 . DOI: 10.13193/j.issn.1673-7717.2025.02.005
糖尿病是一种由自身免疫功能代谢紊乱、遗传等因素作用于机体导致胰腺释放胰岛功能减退或胰岛素抵抗而引起的体内代谢失调、血糖升高的状态。虽然注射胰岛素对于糖尿病的治疗具有一定疗效,但是若想治愈糖尿病只能通过胰腺或者胰岛的移植,可由于移植供体的缺乏、移植手术所造成的创伤,以及移植后的长期免疫抑制治疗所引起的排斥、感染或者后遗症等各类不良反应[1],使得此类疗法临床广泛应用和推广的难度相对较大。随着近年来对于干细胞的研究的兴起,人们将治愈糖尿病的希望转向了胰腺干细胞,并且已经有研究证实了胰腺干细胞的存在,在一定条件下可以将其诱导分化为胰岛细胞[2-10]。胰腺干细胞具有干细胞特有的快速增殖和分化潜能,但是分化过程不涉及横向分化的问题,在体外对胰腺干细胞进行特定条件下的诱导分化,可以得到大量的胰岛细胞;不仅如此,利用自身胰腺干细胞进行分化得到的胰岛细胞,可以有效地避免异体移植所产生的免疫排斥反应[8-10],所以诸多优点使诱导胰腺干细胞分化为胰岛细胞进而治疗糖尿病成为了突破糖尿病的新方向。
雷公藤泛指卫矛科雷公藤属植物,味苦、辛,性凉,归肝、心、肾、胃四经,具有清热解毒、祛风除湿、消肿止痛、杀虫止痒、舒筋通络及活血化瘀等功效[11-12]。在中医学理论中,活血化瘀具有“祛瘀血”和“生新”两方面的作用,一方面通过祛瘀、去腐、化旧等方法来祛除瘀血等病理产物,另一方面通过生新方法来生新脉、生新血、生新物,二者相辅相成[13-14]。有研究表明,活血化瘀方药的活血化瘀功效可以通过改善局部微环境,提高干细胞的存活率,促进其增殖分化[14]。本课题组前期研究发现,雷公藤多糖在特定条件下可以诱导胰腺干细胞定向分化为胰岛β细胞[15]。但是该诱导分化机制尚不明确。
研究表明,趋化因子基质细胞衍生因子1(SDF-1)及其受体CXC型趋化因子受体4(CXCR4)组成的生物轴与多种信号通路有着密切的联系,因此其与细胞多项生理功能密切相关[16-24]。研究发现,SDF-1/CXCR4轴可以在造血干细胞、内皮祖细胞和骨髓间充质干细胞等多种干/祖细胞的存活、增殖、动员、迁移和黏附等过程中发挥重要作用,另外,SDF-1/CXCR4生物轴对骨髓间充质干细胞的增殖、分化以及黏附具有促进作用[15-20]。基于这些研究发现,可以看出SDF-1/CXCR4轴可以参与干细胞的增殖、迁移和黏附[21-23],而这些都是干细胞分化的重要前提,所以课题组认为在雷公藤多糖诱导胰腺干细胞分化的实验过程中,SDF-1/CXCR4轴可能也发挥了重要的作用。因此,本研究旨在探讨雷公藤多糖诱导胰腺干细胞分化的作用机制,以期为临床治疗糖尿病提供一定的参考价值。
SPF级别昆明(KM)小鼠新生乳鼠,购自广西中医药大学动物实验中心。
雷公藤多糖(货号:A1918)四川省维克奇生物科技有限公司;低糖培养基(货号:C11885500BT)Gibico;胎牛血清(货号:13011-0311)北京四季青生物科技有限公司;青链霉素混合液(货号:P1400)北京索莱宝科技有限公司;胰酶(货号:S0001)江苏亲科生物研究中心有限公司;双硫腙(货号:D10227)北京沃凯生物科技有限公司;SDF-1酶联免疫吸附(Elisa)试剂盒(货号:RX202859M)睿信生物科技有限公司;实时荧光定量PCR试剂盒(货号:MQ00701S)莫纳生物技术有限公司;RNA提取试剂盒(货号:MI20201S)莫纳生物技术有限公司;反转录试剂盒(货号:MR05101M)莫纳生物技术有限公司;SDF-1与CXCR4引物购于北京擎科生物科技有限公司;RIPA裂解液(货号:)碧云天生物技术有限公司;SDF-1一抗(货号:A1303)、CXCR4一抗(货号:A1325),ABclonal公司;GAPDH(货号:GB15004),武汉赛维尔生物科技有限公司;羊抗兔二抗(货号:S0001)江苏亲科生物研究中心有限公司;全功能酶标仪(型号:Synergy H1)美国Biotek Instruments,Inc;离心机(型号:ST 16R)赛默飞世尔科技公司;实时荧光定量PCR仪(型号:StepOnePlus)Applied Biosystems;基因扩增仪(型号:L96G)杭州朗基科学仪器有限公司;倒置相差显微镜(型号:CKX41)日本奥林巴斯公司。
取新生第4天KM小鼠胰腺,PBS浸泡清洗2~3遍,剪碎组织块至1 mm3大小,加入1 mL胰酶消化5 min,加入2倍体积的含胎牛血清(FBS)的低糖培养基终止消化,800 r/min,离心5 min,弃去上清液,加入低糖培养基重悬,并接种于细胞培养瓶中,置37℃、5%CO2及饱和湿度的恒温培养箱中培养24 h,弃去上清,更换含FBS的低糖培养基,每隔48 h进行换液。
使用倒置相差显微镜观察细胞的形态学特征,并进行拍照记录;取培养第3天的胰腺干细胞进行免疫组化实验鉴定。免疫组化前1 d,将分离到的胰腺干细胞传至24孔板中。待细胞长至50%后,用兔抗Nestin作为一抗,通用性生物素标记羊抗小鼠IgG作为二抗进行免疫组化染色分析,具体操作按照Histostain TM-Plus Kits操作程序进行常规免疫组化染色。
将细胞分为对照组和实验组,对照组常规培养细胞,每48 h更换含10%FBS的低糖培养基,实验组每48 h更换含5%雷公藤多糖[20]及10%FBS的低糖培养基。
DTZ 10 mg溶于3 mL无水乙醇,加Hanks液12 mL,此为储存液,临用时用Hanks液(pH 7.8)1∶100稀释,0.22 μm孔径滤膜过滤,滴入各组细胞,室温10 min后,镜检。倒置相差显微镜对各组细胞每48 h进行观察拍照并记录。
取对照组和实验组第0、2、4、6、8……42 d的细胞培养基,4000 r/min离心20 min,收集上清液,按Elisa试剂盒说明书进行操作,在酶标仪上测出OD值,并对数据进行统计学分析。
用Monzol试剂提取各组细胞的总RNA。以RNA为模板反转录为cDNA后,使用qPCR技术检测各组细胞中SDF-1和CXCR4的mRNA水平,内参为GAPDH。以2-ΔΔCT法计算各组细胞中SDF-1、CXCR4 mRNA的相对表达量。引物序列见表1。
提取各组细胞总蛋白,对蛋白进行定量、电泳分离。转PVDF膜后室温条件下封闭2 h,最后再分别加SDF-1(1∶500)、CXCR4(1∶500)、GAPDH(1∶500)一抗,4℃孵育过夜,加入二抗(1∶1000),37℃孵育1 h。ECL试剂显影,使用Image J软件分析各个蛋白条带灰度值,以GAPDH为内参,计算SDF-1、CXCR4蛋白水平。
实验数据使用SPSS26.0软件进行统计分析,计量资料以均数±标准差()表示,多组间比较采用单因素方差分析,组间两两比较行t检验,P<0.05为差异有统计学意义。
胰腺干细胞贴壁生长,呈现出明显的分裂和生长状态,并很快形成一个大的群体,这些细胞大而圆,单核,核质比高,具有强烈的细胞质折射,以及很强的增殖能力(插页Ⅲ图1)。使用免疫组化法鉴定所培养的细胞Nestin阳性、呈棕黄色(插页Ⅲ图2)。
对照组与实验组经DTZ染色后均出现棕红色阳性,且实验组阳性染色细胞数量明显高于对照组(插页Ⅳ图3)。
观察对照组和实验组两组细胞的观察记录,各组细胞随着培养时间的迁移均出现增殖、分化、集聚现象,相比于对照组细胞,实验组细胞生长状态更为显著(插页Ⅳ-Ⅴ图4)。
对照组细胞SDF-1释放量变化不大(P>0.05),实验组细胞SDF-1释放量在第0~10天变化不大,与对照组细胞上清液中的SDF-1释放量没有明显差距(P>0.05);在第10~26天,SDF-1释放量随着时间的增加而逐步上升,在第26天达到峰值,随后在第26~42天,SDF-1释放量随着时间的增加而逐步下降,且在第12~40天,实验组与对照组细胞上清液中的SDF-1释放量的差值先逐步上升后逐步下降,该差值具有统计学意义(P<0.05);在第42~46天,对照组与实验组细胞上清液中的SDF-1释放量没有明显差距(P>0.05)(插页Ⅵ图5)。
与对照组相比,实验组细胞中SDF-1、CXCR4的mRNA表达水平均明显升高,差异有统计学意义(P<0.05)(表2)。
与对照组相比,实验组细胞中SDF-1、CXCR4的蛋白表达量均明显升高,差异有统计学意义(P<0.05)(图6、表3)。
糖尿病是一种全身性疾病,全球患病率居高不下[24]。胰岛移植为治愈糖尿病提供了新方向和方法。本课题组在前期研究中发现雷公藤多糖可以诱导胰腺干细胞分化为胰岛β细胞[15]。雷公藤具有活血化瘀的功效,中医理论认为活血化瘀具有“祛瘀”和“生新”两方面的作用,且两者相辅相成[13]。“祛瘀”是通过“活血”作用调节气血关系,维持脉道通利,既可以保证干细胞在血液中的顺利运行,让干细胞在迁移时通畅无阻,还可以修复受损组织的气血津液,促进干细胞增殖和分化;而“生新”则是指通过促进先天之精化生气血,推动血液运行,使得“瘀血祛而新血生”,机体“复其真气”,从而也推动干细胞的增殖、迁移和分化,最后达到气机通畅、脏腑调和的功效[25-26]。由此我们推测,雷公藤多糖可以通过雷公藤“活血化瘀”的功效,改善了胰腺干细胞所处的微环境,最终达到了促进胰腺干细胞增殖、迁移和分化的作用,这也体现了《黄帝内经》中“疏其气血,令其条达”的思想。
本研究通过免疫组化实验证实细胞的Nestin呈阳性:Nestin是一种中间丝类型的高分子量蛋白,在未分化和具有增殖能力的细胞中表达,是神经干细胞和胰腺干细胞的分子标志物;且观察细胞发现大而圆且折光度高的胰腺干细胞会随着培养时间的增加不断进行增殖,与此同时还会沿着特定的方向迁移并逐步聚集成团,符合胰腺干细胞的细胞形态学特征及生理特性。由此可以确定本研究所使用的细胞正是胰腺干细胞。
除此之外,在对细胞进行形态学观察的过程中发现,相较于对照组,实验组随着给药时间的积累,细胞出现了更为明显地向某一方向大量迁移、聚集并变形分化,且在迁移过程中还出现了大量增殖的现象。有研究发现,SDF-1/CXCR4轴可增强内皮细胞、肝癌细胞和CD34+细胞等多种细胞的趋化和黏附能力[21-23]。除此之外,SDF-1/CXCR4轴还可以在造血干细胞、内皮祖细胞、骨髓间充质干细胞和心肌干细胞等多种干/祖细胞的存活、增殖、动员、迁移、黏附和分化等过程中发挥重要作用[16-20]。由此本课题组推测雷公藤多糖诱导胰腺干细胞分化的作用机制可能与SDF-1/CXCR4轴有关。
通过Elisa实验发现,在第10~42天,实验组细胞上清液中的SDF-1释放量随着细胞培养天数的增加先上升后下降,而对照组细胞的SDF-1释放量在全程变化不大(P>0.05),且实验组SDF-1释放量明显高于对照组(P<0.05)。结合qPCR实验和WB实验发现实验组的SDF-1和CXCR4的mRNA含量以及蛋白表达量均明显高于对照组。由此可见,雷公藤多糖在诱导胰腺干细胞分化的过程中激活了SDF-1/CXCR4信号通路,进而刺激了细胞大量释放SDF-1,并且激发了SDF-1/CXCR4信号轴中的相关分子SDF-1和CXCR4表达增强。DTZ实验证实了实验组分化出的胰岛β细胞明显高于对照组,由此可以进一步推断SDF-1/CXCR4通路表达增强可以促进胰腺干细胞定向分化为胰岛β细胞。
综上所述,雷公藤多糖可以通过激活SDF-1/CXCR4信号通路进而促进胰腺干细胞分化为胰岛β细胞。本研究为体外获取大量胰岛β细胞,从而用以移植治疗糖尿病提供了新的思路与方法。但是本研究仅仅验证了SDF-1/CXCR4轴在雷公藤多糖促进胰腺干细胞分化过程中的作用,但是SDF-1/CXCR4轴与雷公藤多糖促进胰腺干细胞分化过程中出现的细胞增殖、迁移、黏附、归巢等生理活动的具体相关关系尚未进行论证,并且对其他靶点、通路途径也未进行验证,仍有不足之处。在后续的研究中,将会进一步探索和完善雷公藤多糖促进胰腺干细胞分化的作用机制以及SDF-1/CXCR4轴对雷公藤多糖促进胰腺干细胞分化的具体作用与影响。
  • 国家自然科学基金项目(82260861)
  • 广西一流学科建设开放课题(2019XK137)
  • 广西一流学科建设项目重点课题(2018XK023; 2018XK024)
  • 广西高校中青年教师科研基础能力提升项目(2021KY0291)
  • 广西中医药大学桂派杏林拔尖人才项目(2022C002)
  • 广西中医药大学桂派中医药传承创新团队资助项目(2022B004)
  • 广西中医药大学校级重点硕士研究生科研创新项目(YCSZ2022003)
  • 广西中医药大学大学生创新创业训练计划项目(202210600017; 202010600018)
  • 广西中医药大学校级科研项目(2019MS001)
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doi: 10.13193/j.issn.1673-7717.2025.02.005
  • 首发时间:2026-10-30
  • 出版时间:2025-02-10
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基金
国家自然科学基金项目(82260861)
广西一流学科建设开放课题(2019XK137)
广西一流学科建设项目重点课题(2018XK023; 2018XK024)
广西高校中青年教师科研基础能力提升项目(2021KY0291)
广西中医药大学桂派杏林拔尖人才项目(2022C002)
广西中医药大学桂派中医药传承创新团队资助项目(2022B004)
广西中医药大学校级重点硕士研究生科研创新项目(YCSZ2022003)
广西中医药大学大学生创新创业训练计划项目(202210600017; 202010600018)
广西中医药大学校级科研项目(2019MS001)
作者信息
    广西中医药大学,广西 南宁 530023

通讯作者:

岑妍慧(1980),女,广西北海人,教授,博士,研究方向:中草药防治相关疾病的应用基础。
刘鑫(1993-),女,河北石家庄人,硕士研究生,研究方向:中草药防治相关疾病的应用基础。E-mail:。
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2种不同金属材料的力学参数
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属数
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genus
种数
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species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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