In vitro growth and maintenance of embryonic stem (ES) cell lines derived from ICM cells of various blastocysts of 129 strain mice,the sustenance of their pluripotency and normal karyotype depend on the feeder layer o...In vitro growth and maintenance of embryonic stem (ES) cell lines derived from ICM cells of various blastocysts of 129 strain mice,the sustenance of their pluripotency and normal karyotype depend on the feeder layer of mouse embryonic fibroblasts (MEF).Compared with the feeder layer of MEF cells,medium conditioned by Buffalo rat liver cells (BRL-CM) is able to maintain pluripotency and karyotypic normality of ES cells only in short term cell propagation.Besides,ES cells grown in BRL-CM are also capable of aggregation with 8-cell embryos of Swiss strain and develop into germ line chimaeras.Modification to the method of aggregating ES cells with early embryos by making a hole in agar layer on the top of MEF feeder cells was shown to be more converient and efficient than the conventional microdrop method.展开更多
AIM: To explore the possibility of human umbilical cord mesenchymal stem cells(h UCMSCs), human umbilical vein endothelial cells(h UVECs), human dental pulp stem cells(h DPSCs) and human periodontal ligament stem cell...AIM: To explore the possibility of human umbilical cord mesenchymal stem cells(h UCMSCs), human umbilical vein endothelial cells(h UVECs), human dental pulp stem cells(h DPSCs) and human periodontal ligament stem cells(h PDLSCs) serving as feeder cells in co-culture systems for the cultivation of limbal stem cells.METHODS: Different feeder layers were cultured in Dulbecco's modified Eagle's medium(DMEM)/F12 and were treated with mitomycin C. Rabbits limbal stem cells(LSCs) were co-cultured on h UCMSCs, h UVECs, h DPSCs, h PDLSCs and NIH-3T3, and then comparative analysis were made between each group to see their respective colony-forming efficiency(CFE) assay and immunofluorescence(IPO13,CK3/12).RESULTS: The efficiency of the four type cells in supporting the LSCs morphology and its cellular differentiation was similar to that of NIH-3T3 fibroblasts as demonstrated by the immunostaining properties analysis, with each group exhibiting a similar strong expression pattern of IPO13, but lacking CK3 and CK12 expression in terms of immunostaining. But h UCMSCs, h DPSCs and h PDLSCs feeder layers were superior in promoting colony formation potential of cells when compared to h UVECs and feedercell-free culture.CONCLUSION: hUCMSCs, hDPSCs and hPDLSCs can be a suitable alternative to conventional mouse NIH-3T3 feeder cells, so that risk of zoonotic infection can be diminished.展开更多
Myocardium tissue of Kunming mouse embryonic bodies was cultured with the feeder layer of their embryonic fibroblasts in TCM199.The results indicate that some piece of myocardium tissue can be cultured in the feeder l...Myocardium tissue of Kunming mouse embryonic bodies was cultured with the feeder layer of their embryonic fibroblasts in TCM199.The results indicate that some piece of myocardium tissue can be cultured in the feeder layer;Their contracting frequency changed with the temperature and the morphology changed with the time;It was not all pieces of tissue with the same appearance that could contract,even though some of them grow well.展开更多
To avoid the direct contact with mouse cells and possible heterogeneous pathogen in future application, we need to replace mouse embryonic fibroblasts with human fibroblasts as the feeder layer to maintain human embry...To avoid the direct contact with mouse cells and possible heterogeneous pathogen in future application, we need to replace mouse embryonic fibroblasts with human fibroblasts as the feeder layer to maintain human embryonic stem cells growth in the undifferentiated state. We success-fully use human fibroblasts derived from aborted fetus and adult prepuce as feeder layer to maintain human embryonic stem cells growth. During the passage and growth on this feeder layer, the human embryonic stem cells can keep their undifferentiated state.展开更多
SNL cells(permanent line of irradiated mouse fibroblast cells), primary mice embryonic fibroblasts (PMEF) cells and primary chicken embryonic fibroblasts (PCEF) cells were respectively used as the feeder cells for chi...SNL cells(permanent line of irradiated mouse fibroblast cells), primary mice embryonic fibroblasts (PMEF) cells and primary chicken embryonic fibroblasts (PCEF) cells were respectively used as the feeder cells for chicken embryonic stem cell culture. The isolated blastoderm cells from the stage X embryos of chicken were cultured in Dulercco’s Modified Eagle Medium (DMEM) supplemented with leukemia inhibitory factor (LIF, 1 000 IU/ml), basic fibroblast growth factor (bFGF 10 ng/ml) and stem cell factor (SCF, 5 ng/ml). The alkaline phosphatase (AKP) test, differentiation experiment in vitro and chimeric chicken production were carried out. The resuts showed that culture on feeder layer of PMEF yielded high quality CES cell colonies. The shape of typical CES clone showed as follows: nested aggregation (clone) with clear edge and round surface as well as close arrangement within the clone. Strong positive AKP reactive cells were observed. On the other hand, the fourth passage CES cells could differentiate into various cells in the absence of feeder layer cells and LIF in vitro . The third and fourth passage cells were injected into the subgerminal cavity of recipient embryos at stage X. The manipulated embryos were incubated until hatching. Of 269 Hailan embryos injected with CES cells of Shouguang Chickens, 8 2% (22/269) survived to hatching, 3 feather chimeras had been produced, which suggests that an effective culture systems were established and it could promote the growth of CES cells and maintain them in an undifferentiated state .展开更多
文摘In vitro growth and maintenance of embryonic stem (ES) cell lines derived from ICM cells of various blastocysts of 129 strain mice,the sustenance of their pluripotency and normal karyotype depend on the feeder layer of mouse embryonic fibroblasts (MEF).Compared with the feeder layer of MEF cells,medium conditioned by Buffalo rat liver cells (BRL-CM) is able to maintain pluripotency and karyotypic normality of ES cells only in short term cell propagation.Besides,ES cells grown in BRL-CM are also capable of aggregation with 8-cell embryos of Swiss strain and develop into germ line chimaeras.Modification to the method of aggregating ES cells with early embryos by making a hole in agar layer on the top of MEF feeder cells was shown to be more converient and efficient than the conventional microdrop method.
基金Supported by the Project Plan of Science and Technology Assistance in Xinjiang Autonomous Region(No.201491171)
文摘AIM: To explore the possibility of human umbilical cord mesenchymal stem cells(h UCMSCs), human umbilical vein endothelial cells(h UVECs), human dental pulp stem cells(h DPSCs) and human periodontal ligament stem cells(h PDLSCs) serving as feeder cells in co-culture systems for the cultivation of limbal stem cells.METHODS: Different feeder layers were cultured in Dulbecco's modified Eagle's medium(DMEM)/F12 and were treated with mitomycin C. Rabbits limbal stem cells(LSCs) were co-cultured on h UCMSCs, h UVECs, h DPSCs, h PDLSCs and NIH-3T3, and then comparative analysis were made between each group to see their respective colony-forming efficiency(CFE) assay and immunofluorescence(IPO13,CK3/12).RESULTS: The efficiency of the four type cells in supporting the LSCs morphology and its cellular differentiation was similar to that of NIH-3T3 fibroblasts as demonstrated by the immunostaining properties analysis, with each group exhibiting a similar strong expression pattern of IPO13, but lacking CK3 and CK12 expression in terms of immunostaining. But h UCMSCs, h DPSCs and h PDLSCs feeder layers were superior in promoting colony formation potential of cells when compared to h UVECs and feedercell-free culture.CONCLUSION: hUCMSCs, hDPSCs and hPDLSCs can be a suitable alternative to conventional mouse NIH-3T3 feeder cells, so that risk of zoonotic infection can be diminished.
基金Project are supported by Heilongjiang Natural Science found
文摘Myocardium tissue of Kunming mouse embryonic bodies was cultured with the feeder layer of their embryonic fibroblasts in TCM199.The results indicate that some piece of myocardium tissue can be cultured in the feeder layer;Their contracting frequency changed with the temperature and the morphology changed with the time;It was not all pieces of tissue with the same appearance that could contract,even though some of them grow well.
基金supported by the National Natural Science Foundation of China(Grant Nos.30030070 and 3010403048)the National Major Basic Research Project(Grant No.001CB51010)+1 种基金the Natural Science Fund of Hunan Province(Grant No.00JJY2036)the Science and Technology Conquest of Hunan Province(Grant No.01SSY1001).
文摘To avoid the direct contact with mouse cells and possible heterogeneous pathogen in future application, we need to replace mouse embryonic fibroblasts with human fibroblasts as the feeder layer to maintain human embryonic stem cells growth in the undifferentiated state. We success-fully use human fibroblasts derived from aborted fetus and adult prepuce as feeder layer to maintain human embryonic stem cells growth. During the passage and growth on this feeder layer, the human embryonic stem cells can keep their undifferentiated state.
文摘SNL cells(permanent line of irradiated mouse fibroblast cells), primary mice embryonic fibroblasts (PMEF) cells and primary chicken embryonic fibroblasts (PCEF) cells were respectively used as the feeder cells for chicken embryonic stem cell culture. The isolated blastoderm cells from the stage X embryos of chicken were cultured in Dulercco’s Modified Eagle Medium (DMEM) supplemented with leukemia inhibitory factor (LIF, 1 000 IU/ml), basic fibroblast growth factor (bFGF 10 ng/ml) and stem cell factor (SCF, 5 ng/ml). The alkaline phosphatase (AKP) test, differentiation experiment in vitro and chimeric chicken production were carried out. The resuts showed that culture on feeder layer of PMEF yielded high quality CES cell colonies. The shape of typical CES clone showed as follows: nested aggregation (clone) with clear edge and round surface as well as close arrangement within the clone. Strong positive AKP reactive cells were observed. On the other hand, the fourth passage CES cells could differentiate into various cells in the absence of feeder layer cells and LIF in vitro . The third and fourth passage cells were injected into the subgerminal cavity of recipient embryos at stage X. The manipulated embryos were incubated until hatching. Of 269 Hailan embryos injected with CES cells of Shouguang Chickens, 8 2% (22/269) survived to hatching, 3 feather chimeras had been produced, which suggests that an effective culture systems were established and it could promote the growth of CES cells and maintain them in an undifferentiated state .
