Article(id=1322934485662179925, tenantId=1146029695717560320, journalId=1319373162502258839, issueId=1322934434474885947, articleNumber=null, orderNo=null, doi=10.16016/j.2097-0927.202407013, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1719849600000, receivedDateStr=2024-07-02, revisedDate=1726243200000, revisedDateStr=2024-09-14, acceptedDate=null, acceptedDateStr=null, onlineDate=1793341760316, onlineDateStr=2026-10-30, pubDate=1736870400000, pubDateStr=2025-01-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793341760316, onlineIssueDateStr=2026-10-30, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793341760316, creator=13701087609, updateTime=1793341760316, updator=13701087609, issue=Issue{id=1322934434474885947, tenantId=1146029695717560320, journalId=1319373162502258839, year='2025', volume='47', issue='1', pageStart='1', pageEnd='99', issueExtLink='null', onlineDate='null', pubDate='1736870400000', pubDateStr='2025-01-15', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793341748111, creator='13701087609', updateTime=1793341748111, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=82, endPage=91, ext={EN=ArticleExt(id=1322934485922226775, articleId=1322934485662179925, tenantId=1146029695717560320, journalId=1319373162502258839, language=EN, title=Mechanism of abnormal specification of spermatogonial stem cells after
Rb1 knockout in mitotic-arrested prospermatogonia, columnId=1320434418116837551, journalTitle=Journal of Army Medical University, columnName=Basic Medicine, runingTitle=null, highlight=null, articleAbstract=
Objective To investigate the underlying mechanism of abnormal specification of spermatogonial stem cells (SSCs) in male mice following Rb1 conditional knockout in mitotic-arrested prospermatogonia.
Methods ① R language was used to analyze the single-cell RNA sequencing (scRNA-seq) data of prospermatogonia derived from postnatal day 0.5 (P0.5) male mice through the gene expression omnibus (GEO) public database (accession number:GSE124904). ② Mitoti-arrested prospermatogonia Rb1 conditional knockout (cKO) mice as well as Rb1 cKO mice with Id4-gfptransgene were generated using Vasa-Cre mice crossed with Rb1flox/flox or Id4-gfpTg;Rb1flox/flox mice. PCR was employed to detect the deletion of Rb1 in order todistinguish the control and cKOmale mice. The testes of male mice (n=3~8) within a few days after birth were collected. After that,flow cytometry was applied to divide the ID4-GFP cells into 3 communities based on the GFP fluorescence intensity,and then detect the number of cells and cell cycle in each community. ③ Germ cell proliferation (Ki67 positive,Ki67+),SSCs specification (FOXO1 nuclear transition),and germ cell differentiation (STRA8+) were detected with immunofluorescence staining. ④ TUNEL staining was utilized to detect cell apoptosis.
Results ① The results of scRNA-seq showed that in the two set clusters of prospermatogonia,the prospermatogonia that further specifies to generate SSCs had enriched genes that are associated with cell proliferation. ② Germ cell proliferation assay indicated that the average ratio of Ki67+ germ cells in the testicular cross-section of the cKO mice was significantly higher than that of the control mice at P2.5 [(46.10±6.21)% vs (11.22±3.27)%,P<0.01]. ③ Flow cytometry revealed that,among the brightest community of ID4-GFP cells,the percentage of the cells at S phase was obviously higher in the testicular cells derived from the cKO mice when compared to the control mice at P2.5 [(12.05±1.22)% vs (5.05±1.46)%,P<0.05].④ TUNEL staining displayed that cell apoptosis was detected in the testicular cross-section of cKO mice rather than that of the control mice. ⑤ The results of SSCs specification exploration showed that statistical difference was observed in the percentage of cytoplasmic FOXO1 in the testicular cross-section between the control and cKO mice [(20.57±2.15)% vs (45.08±2.45)%,P<0.01].
Conclusion Rb1 knockout in mitotic-arrested prospermatogonia disrupts their postnatal cell cycle re-enter and induces cell apoptosis,which further results in abnormal SSC specification.
, authors=Xinling CHEN
1, 2, Yixuan LONG
1, Guihua DU
1, 2, authorsList=Xinling CHEN, Yixuan LONG, Guihua DU, authorCompany=null, correspAuthors=Guihua DU, authorNote=null, correspAuthorsNote=null, copyrightStatement=© 2025 Journal of Army Medical University, copyrightOwner=Editorial Office of Journal of Army Medical University, 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=1322934487574782567, articleId=1322934485662179925, tenantId=1146029695717560320, journalId=1319373162502258839, language=CN, title=静息期精原前体细胞
Rb1基因敲除致精原干细胞特化异常机制初探, columnId=1322185528879993170, journalTitle=陆军军医大学学报, columnName=基础医学, runingTitle=null, highlight=null, articleAbstract=
目的 探讨静息期精原前体细胞Rb1敲除致雄鼠精原干细胞(spermatogonial stem cells,SSCs)特化异常的调控机制。
方法 ①用R对在基因表达综合数据库(gene expression omnibus,GEO)(GEO登记号:GSE124904)获取的出生后0.5 d(postnatal day 0.5,P0.5)雄鼠精原前体细胞单细胞测序数据进行分析。②用Vasa-Cre工具鼠与Rb1flox/flox(或Id4-gfpTg;Rb1flox/flox)小鼠配繁构建静息期精原前体细胞Rb1条件性敲除(conditional knock out,cKO)雄鼠或带ID4绿色荧光(ID4-GFP)的Rb1 cKO雄鼠,通过PCR基因鉴定判断生殖细胞Rb1敲除情况以区分cKO雄鼠与对照(Con)。采集出生后数天内的小鼠 (n=3~8)睾丸,利用流式细胞术基于细胞荧光强度将ID4-GFP细胞均分为3个群落,检测各个群落细胞数量和细胞周期。③免疫荧光染色检测生殖细胞增殖(Ki67+)、SSCs特化(FOXO1胞核转换)和生殖细胞分化(STRA8+)情况。④TUNEL染色检测细胞凋亡。
结果 ①单细胞测序数据分析显示:在P0.5精原前体细胞的2类细胞中,与细胞增殖相关的基因在将特化为精原干细胞的那一群细胞中富集表达。②生殖细胞增殖情况检测表明:P2.5时,对照[(11.22±3.27)%]与cKO小鼠[(46.10±6.21)%)]小鼠睾丸横切面生殖细胞Ki67+占比差异具有统计学意义(P<0.01)。③流式细胞术分析表明:P2.5对照[(5.05±1.46)%]与cKO[(12.05±2.22)%]小鼠睾丸ID4-GFP荧光强度最强的那群细胞处于S期的占比差异具有统计学意义(P<0.05)。④TUNEL染色显示cKO组而非对照组小鼠睾丸横切面检测到细胞发生凋亡。⑤SSCs特化标志检测结果显示对照[(20.57±2.15)%]和cKO[(45.08±2.45)%]小鼠睾丸横切面生殖细胞FOXO1位于细胞质的占比差异具有统计学意义(P<0.01)。
结论 静息期精原前体细胞Rb1敲除使其出生后细胞周期恢复紊乱、凋亡发生,导致SSCs特化异常。
, authors=陈新玲
1, 2, 龙旖璇
1, 杜桂花
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1Department of Occupational Health and Toxicology,School of Public Health, Nanchang University,Nanchang,Jiangxi,China
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P0.5精原前体细胞scRNA-seq数据分析A:P0.5精原前体细胞scRNA-seq细胞分群;B:干细胞相关标志基因在2个群落表达Violin plot图;C:群落1高表达差异基因通路分析cnet图;D:GO分析基于P值筛选出的生物学过程(BP)、细胞组分(CC)和分子功能(MF)前十条目;E:Mki67和Rb1表达UMAP图;F:促增殖相关基因在两个群落表达Violin plot图
, figureFileSmall=HELCaAKRGkChqx2FaLYN4w==, figureFileBig=Zfgs69gYGUUgwv+49GUxIg==, tableContent=null), ArticleFig(id=1322934491555177104, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322934485662179925, language=EN, label=null, caption=null, figureFileSmall=OPxg/EjSYi63shSff8wA1Q==, figureFileBig=cXFKofsC34SucPaOvJcegA==, tableContent=null), ArticleFig(id=1322934491626480273, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322934485662179925, language=CN, label=图2, caption=
RB1缺失对精原前体细胞细胞周期恢复的影响(n=3~4)A:P1.5~2.5小鼠睾丸横切面精原前体细胞(TRA98+)中处于增殖状态(Ki67+)的免疫荧光共染典型图 △:示Ki67+生殖细胞;B:定量分析 a:P<0.01,与Con比较
, figureFileSmall=OPxg/EjSYi63shSff8wA1Q==, figureFileBig=cXFKofsC34SucPaOvJcegA==, tableContent=null), ArticleFig(id=1322934491714560658, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322934485662179925, language=EN, label=null, caption=null, figureFileSmall=zQWVqDZa19KcS545Mdgs+Q==, figureFileBig=oiFt2EncxQsZ/qD8ffhMBg==, tableContent=null), ArticleFig(id=1322934491802641043, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322934485662179925, language=CN, label=图3, caption=
RB1缺失对小鼠睾丸ID4-GFP细胞细胞周期的影响(n=3~5)a:P<0.05,与Con比较A:ID4-GFP小鼠睾丸生精小管典型图;B:ID4-GFP细胞分群示意图;C~E:P1.5~P6.5小鼠睾丸ID4-GFPBright、ID4-GFPMid和ID4-GFPDim分别处于G0/G1、S和G2/M期的细胞占比;F:免疫荧光共染检测P2.5 ID4-GFP小鼠睾丸横切面生殖细胞(TRA98+)细胞增殖(Ki67+)情况典型图 ☆:示Ki67-;△:示Ki67+
, figureFileSmall=zQWVqDZa19KcS545Mdgs+Q==, figureFileBig=oiFt2EncxQsZ/qD8ffhMBg==, tableContent=null), ArticleFig(id=1322934491873944212, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322934485662179925, language=EN, label=null, caption=null, figureFileSmall=3azGGuTaA+PzHhPvYEnO9w==, figureFileBig=+7yi+PiEVYRDgYGW9dafeQ==, tableContent=null), ArticleFig(id=1322934491945247381, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322934485662179925, language=CN, label=图4, caption=
RB1缺失对小鼠睾丸生殖细胞及ID4-GFP3个亚群细胞数量和细胞凋亡影响(n=3~5)a:P<0.05,与Con比较A:P1.5~3.5小鼠睾丸横切面生殖细胞(TRA98)免疫荧光染色典型图;B:P1.5~3.5小鼠睾丸横切面单位管腔生殖细胞数量统计;C~E:P1.5~P6.5小鼠睾丸ID4-GFPBright、ID4-GFPMid和ID4-GFPDim细胞数量统计;F:P2.5小鼠睾丸横切面TUNEL染色典型图 △:示凋亡细胞
, figureFileSmall=3azGGuTaA+PzHhPvYEnO9w==, figureFileBig=+7yi+PiEVYRDgYGW9dafeQ==, tableContent=null), ArticleFig(id=1322934492008161942, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322934485662179925, language=EN, label=null, caption=null, figureFileSmall=GN4C95eq4QCnIpH+DT4zLw==, figureFileBig=kTgvRCEE8dm9Z3wdWx37QQ==, tableContent=null), ArticleFig(id=1322934492062687895, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322934485662179925, language=CN, label=图5, caption=
RB1缺失对精原前体细胞特化为SSCs的影响(n=3~8)a:P<0.01,与Con比较;△:示双荧光阳性细胞A:P3.5小鼠睾丸横切面ZBTB16和FOXO1免疫荧光共染典型图;B:ZBTB16+细胞中FOXO1位于细胞质的百分比;C:P6.5小鼠睾丸横切面生殖细胞(TRA98+)STRA8染色典型图;D:睾丸横切面生殖细胞中STRA8+百分比
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Vasa-Cre介导的Rb1敲除影响精原前体细胞细胞周期恢复致SSCs特化异常模式图, figureFileSmall=bDq052/xlQTTtv6K4shetg==, figureFileBig=kboOP7UWt8izW4W6HWjzGg==, tableContent=null), ArticleFig(id=1322934492272403098, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322934485662179925, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 引物名 | 引物序列 (5'―3') | 产物/bp |
|---|
| Rb1fl/fl | 正向:CTCATGGACTAGGTTAAGTTGTGG | flox:201 |
| 反向:GCATTTAATTGTCCCCTAATCC | WT:163 |
| Id4-gfpTg | 正向:AAGTTCATCTGCACCACCG | 180 |
| 反向:TCCTTGAAGAAGATGGTGCG |
| Vasa-Cre-Control | 正向:CTAGGCCACAGAATTGAAAGATCT | 324 |
| 反向:GTAGGTGGAAATTCTAGCATCATCC |
| Vasa-Cre-transgene | 正向:CACGTGCAGCCGTTTAAGCCGCGT | 240 |
| 反向:TTCCCATTCTAAACAACACCCTGAA |
), ArticleFig(id=1322934492339511963, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322934485662179925, language=CN, label=表1, caption=
基因鉴定引物序列
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| 引物名 | 引物序列 (5'―3') | 产物/bp |
|---|
| Rb1fl/fl | 正向:CTCATGGACTAGGTTAAGTTGTGG | flox:201 |
| 反向:GCATTTAATTGTCCCCTAATCC | WT:163 |
| Id4-gfpTg | 正向:AAGTTCATCTGCACCACCG | 180 |
| 反向:TCCTTGAAGAAGATGGTGCG |
| Vasa-Cre-Control | 正向:CTAGGCCACAGAATTGAAAGATCT | 324 |
| 反向:GTAGGTGGAAATTCTAGCATCATCC |
| Vasa-Cre-transgene | 正向:CACGTGCAGCCGTTTAAGCCGCGT | 240 |
| 反向:TTCCCATTCTAAACAACACCCTGAA |
), ArticleFig(id=1322934492419203740, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322934485662179925, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 步骤 | 温度 | 时间 | 循环数 |
|---|
| 1 | 94 ℃ | 2 min | 1 |
| 2 | 94 ℃ | 20 s | 10 (每个循环降0.5 ℃) |
| 起始65 ℃ | 15 s |
| 68 ℃ | 10 s |
| 3 | 94 ℃ | 15 s | 28 |
| 60 ℃ | 15 s |
| 72 ℃ | 10 s |
| 4 | 10 ℃ | Hold | 1 |
), ArticleFig(id=1322934492490506909, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322934485662179925, language=CN, label=表2, caption=
PCR扩增程序
, figureFileSmall=null, figureFileBig=null, tableContent=
| 步骤 | 温度 | 时间 | 循环数 |
|---|
| 1 | 94 ℃ | 2 min | 1 |
| 2 | 94 ℃ | 20 s | 10 (每个循环降0.5 ℃) |
| 起始65 ℃ | 15 s |
| 68 ℃ | 10 s |
| 3 | 94 ℃ | 15 s | 28 |
| 60 ℃ | 15 s |
| 72 ℃ | 10 s |
| 4 | 10 ℃ | Hold | 1 |
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