Developmental potency of primitive and embryonic ectoderm cells from 4.50-day to 6.25-day post-coitum (p.c.) mouse embryos and primordial germ cells from 12.50-day p.c.male genital ridges of fetal mice were studied by...Developmental potency of primitive and embryonic ectoderm cells from 4.50-day to 6.25-day post-coitum (p.c.) mouse embryos and primordial germ cells from 12.50-day p.c.male genital ridges of fetal mice were studied by direct introducing them into 3.50-day p.c.blastocysts.Sixteen (61.5) overt chimaeras out of 26(50%) offsprings were obtained after transfer of 52 blastocysts injected with 4.50-day primitive ectoderm cells;four (16.0%) overt chimaeras were obtained out of 25 (51.0%) offsprings with 4.75-day primitive ectoderm cells from 49 transferred blastocysts.However,no overt chimaera was obtained with either 5.25-day or 6.25-day embryonic ectoderm cells or 12.50-day male primordial germ cells.GPI analysis of mid-gestation conceptuses developed from injected blastocysts showedthat 5.25-day embryonic ectoderm cells could only contributed to yolk sac of conceptus.Results suggested that implantation acts as a trigger for the determination of primitive ectoderm cells,and their developmental potency becomes limited within a short period of time in normal development.展开更多
Paraffin sections from 6 cases of Ewing's sarcoma were immunostained by ABC method using BMP -McAb for investigating the existence of BMP in Ewing' s sarcoma. All cases were positive. The result was coincided...Paraffin sections from 6 cases of Ewing's sarcoma were immunostained by ABC method using BMP -McAb for investigating the existence of BMP in Ewing' s sarcoma. All cases were positive. The result was coincided with human tumor transplants in athymic nude mouse by Bauer. It is shown that Ewing' s sarcoma can express BMP. So we support the hypothesis that Ewing' s sarcoma originates from primitive multipotential cells and can pluripotentially differentiate.展开更多
The association of neurogenesis and gliogenesis with glioma remains unclear.By conducting single-cell RNA-seq analyses on 26 gliomas,we reported their classification into primitive oligodendrocyte precursor cell(pri-O...The association of neurogenesis and gliogenesis with glioma remains unclear.By conducting single-cell RNA-seq analyses on 26 gliomas,we reported their classification into primitive oligodendrocyte precursor cell(pri-OPC)-like and radial glia(RG)-like tumors and validated it in a public cohort and TCGA glioma.The RG-like tumors exhibited wild-type isocitrate dehydrogenase and tended to carry EGFR mutations,and the pri-OPC-like ones were prone to carrying TP53 mutations.Tumor subclones only in pri-OPC-like tumors showed substantially down-regulated MHC-I genes,suggesting their distinct immune evasion programs.Furthermore,the two subgroups appeared to extensively modulate glioma-infiltrating lymphocytes in distinct manners.Some specific genes not expressed in normal immune cells were found in glioma-infiltrating lymphocytes.For example,glial/glioma stem cell markers OLIG1/PTPRZ1 and B cell-specific receptors IGLC2/IGKC were expressed in pri-OPC-like and RG-like glioma-infiltrating lymphocytes,respectively.Their expression was positively correlated with those of immune checkpoint genes(e.g.,LGALS33)and poor survivals as validated by the increased expression of LGALS3 upon IGKC overexpression in Jurkat cells.This finding indicated a potential inhibitory role in tumor-infiltrating lymphocytes and could provide a new way of cancer immune evasion.展开更多
文摘Developmental potency of primitive and embryonic ectoderm cells from 4.50-day to 6.25-day post-coitum (p.c.) mouse embryos and primordial germ cells from 12.50-day p.c.male genital ridges of fetal mice were studied by direct introducing them into 3.50-day p.c.blastocysts.Sixteen (61.5) overt chimaeras out of 26(50%) offsprings were obtained after transfer of 52 blastocysts injected with 4.50-day primitive ectoderm cells;four (16.0%) overt chimaeras were obtained out of 25 (51.0%) offsprings with 4.75-day primitive ectoderm cells from 49 transferred blastocysts.However,no overt chimaera was obtained with either 5.25-day or 6.25-day embryonic ectoderm cells or 12.50-day male primordial germ cells.GPI analysis of mid-gestation conceptuses developed from injected blastocysts showedthat 5.25-day embryonic ectoderm cells could only contributed to yolk sac of conceptus.Results suggested that implantation acts as a trigger for the determination of primitive ectoderm cells,and their developmental potency becomes limited within a short period of time in normal development.
文摘Paraffin sections from 6 cases of Ewing's sarcoma were immunostained by ABC method using BMP -McAb for investigating the existence of BMP in Ewing' s sarcoma. All cases were positive. The result was coincided with human tumor transplants in athymic nude mouse by Bauer. It is shown that Ewing' s sarcoma can express BMP. So we support the hypothesis that Ewing' s sarcoma originates from primitive multipotential cells and can pluripotentially differentiate.
基金supported by talent startup funding from Fudan University(Nos.JIF101017,SXF101012,and JIF101047)Science Innovation 2030-Brain Science and Brain-Inspired Intelligence Technology Major Project(No.2021ZD0201100 Task 4 and No.2021ZD0201104)from the Ministry of Science and Technology(MOST),China+3 种基金Jinsong Wu was supported by Shanghai Municipal Science and Technology Major Project(No.2018SHZDZX01)ZJ Lab,and operating grant of Shanghai Brain Bank technical system(No.16JC1420103)Edwin Wang was supported by Alberta Innovates Translational Chair Program in Cancer Genomics,the Natural Sciences and Engineering Research Council of Canada(NSERC,No.RGPIN-2017-04885)Canadian Foundation of Innovation(No.36655).
文摘The association of neurogenesis and gliogenesis with glioma remains unclear.By conducting single-cell RNA-seq analyses on 26 gliomas,we reported their classification into primitive oligodendrocyte precursor cell(pri-OPC)-like and radial glia(RG)-like tumors and validated it in a public cohort and TCGA glioma.The RG-like tumors exhibited wild-type isocitrate dehydrogenase and tended to carry EGFR mutations,and the pri-OPC-like ones were prone to carrying TP53 mutations.Tumor subclones only in pri-OPC-like tumors showed substantially down-regulated MHC-I genes,suggesting their distinct immune evasion programs.Furthermore,the two subgroups appeared to extensively modulate glioma-infiltrating lymphocytes in distinct manners.Some specific genes not expressed in normal immune cells were found in glioma-infiltrating lymphocytes.For example,glial/glioma stem cell markers OLIG1/PTPRZ1 and B cell-specific receptors IGLC2/IGKC were expressed in pri-OPC-like and RG-like glioma-infiltrating lymphocytes,respectively.Their expression was positively correlated with those of immune checkpoint genes(e.g.,LGALS33)and poor survivals as validated by the increased expression of LGALS3 upon IGKC overexpression in Jurkat cells.This finding indicated a potential inhibitory role in tumor-infiltrating lymphocytes and could provide a new way of cancer immune evasion.
