Immunochemical and molecular characterization of a novel cell line derived from the brain of Trachinotus blochii (Teleostei, Perciformes): A fish cell line with oligodendrocyte progenitor cell and tanycyte characteristics.
Ependymal radial glial cells, also called tanycytes, are the predominant glial fibrillary acidic protein (GFAP)- and vimentin (VIM)-expressing cells in fish ependyma. Radial glial cells have been proposed to be neural stem cells but their molecular expression is not well understood. Previous studies revealed that fish neural progenitor and neural stem cells have A2B5, a marker for oligodendrocyte progenitor cells (OPCs). In this study, an A2B5(+) cell line, SPB, was isolated from the brain of the teleost Trachinotus blochii and characterized. SPB cells usually grew as polygonal epithelial cells, but at high density, long processes were commonly observed. Using immunocytochemistry, SPB cells were shown to exhibit oligodendrocyte markers such as galactocerebroside and Olig2, and radial glial cell markers such as brain lipid-binding protein, GFAP, Sox2, and VIM. SPB cells were also observed to have DARPP-32, a marker for tanycytes in mammals, and primary cilia. RT-PCR additionally revealed expression of bone morphogenetic protein 4, connexin35, Noggin2, and proteolipid protein in SPB cells. Results of this study suggest that SPB cells are OPCs that can display tanycyte characteristics. Fish tanycytes can be neural stem cells suggesting that SPB cells are neural stem cells. SPB is the first fish cell line showing primary cilia and markers for both OPCs and tanycytes.
Wen
Chiu-Ming
CM
Department of Life Sciences, National University of Kaohsiung, Kaohsiung, Taiwan. wenchiumin@nuk.edu.tw
Wang
Chun-Shun
CS
Chin
Tzu-Chuan
TC
Cheng
Shih-Ting
ST
Nan
Fan-Hua
FH
D000818:Animals; D001921:Brain / Q000166:cytology*; D018929:Cell Culture Techniques / Q000379:methods*; D002460:Cell Line / Q000166:cytology*; D005732:Gangliosides / Q000378:metabolism; D005786:Gene Expression Regulation; D007150:Immunohistochemistry; D018189:Immunomagnetic Separation; D008863:Microspheres; D009836:Oligodendroglia / Q000166:cytology* / Q000378:metabolism; D010473:Perciformes / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013234:Stem Cells / Q000166:cytology* / Q000378:metabolism
D005732:Gangliosides; C062875:ganglioside A2B5