[Purification and immunogenicity identification of the recombinant protein related with specific IgE against Schistosoma japonicum].

Objective: To purify the specific IgE antibody-related recombinant protein of Schistosoma japonicum and to identify its immunogenicity.

Methods: The recombinant plasmid Sj43B/pGEX-6p-1 was expressed in E. coli BL 21.

Molecular mapping of the origin of postnatal spinal cord ependymal cells: evidence that adult ependymal cells are derived from Nkx6.1+ ventral neural progenitor cells.

Recent studies have suggested that the ependymal cells lining the central canal of postnatal spinal cord possess certain properties of neural stem cells. However, the embryonic origin and developmental potential of the postnatal spinal cord ependymal cells remain to be defined. In this report, we investigated the developmental origin of postnatal spinal ependymal cells by studying the dynamic expression of several neural progenitor genes that are initially expressed in distinct domains of neuroepithelium in young embryos.