Poros Nucleares y Función Celular en Epitelio Mamario / Nuclear Pores and Cellular Function

El presente artículo tiene como objetivo central evidenciar la interesante relación que se establece entre la función celular y el número de poros nucleares, relación que modula el activo intercambio nucleo-citoplasmatico en distintas etapas del ciclo celular de la estirpe HC11.

The main objective of this article is related to the study of different existing relationships between cellular function and the number of nuclear pores in order to explain the amount of nuclear-cytoplasmatic exchange through HC11 cell cycle stages.

Retrovirus mediated IL-23 gene expression in mouse high-metastasis mammary cancer cells MA-891 / 中国免疫学杂志

Objective:The mouse mammary cancer cell line IL-23/MA-891 expressing IL-23 protein was set up and the effect of IL-23 on growth and other biological character of the cells was studied.Methods:The IL-23 gene was sequencely transfected into two packing cell lines (ecotropic ?2 and amphotropic PA317) by a retrovirus vector (LXSN),and the positive cellular clones were screened by G418.After infection to MA-891 cells with the culture supernatant of IL-23/PA317 cells and selected with G418,the IL-23/MA-891 cells to express IL-23 mRNA and protein was detected with RT-PCR,ELISA and immunocytochemical stairing,respectively.The expression of H-2Kb(MHCⅠ),I-Ab(MHC Ⅱ),CD80,CD86 and FAS was examined with flow cytometry.The ability to secrete IFN-? by mouse splenocytes stimulated with the culture supernatant of IL-23/MA-891 cells was detected with ELISA.The proliferation of MA-891,LXSN/MA-891 and IL-23/MA-891 cells was detected by MTT colorimetry and flow cytometry in vitro.Results:IL-23/MA-891 cells express IL-23 stably in mRNA and protein level.The expressing of H-2Kb(MHCⅠ),I-Ab( MHCⅡ),CD80,CD86 and FAS protein by flow cytometry were showing no difference in three kinds of cells.The proliferation rate of IL-23/MA-891 cells were showing little decresed,but statistically showing no difference with parental cells.The culture supernatant of IL-23/MA-891 cells induced secretion of IFN-? by mouse splenocytes were increased compared to parental cells.Conclusion:The cellular clone IL-23/MA-891 with high level expression of IL-23 was produced.