Long-term culture and identification of spermatogonial stem cells from BALB/c mice in vitro.
- Author:
Fu-Jin SHEN
1
;
Ci ZHANG
;
Si-Xing YANG
;
Yun-He XIONG
;
Wen-Biao LIAO
;
Xian-Jin DU
;
Ling-Long WANG
Author Information
- Publication Type:Journal Article
- MeSH: Animals; Cell Culture Techniques; methods; Male; Mice; Mice, Inbred BALB C; Spermatogonia; cytology; Stem Cells; cytology
- From: National Journal of Andrology 2008;14(11):977-981
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo establish a long-term culture system for mouse spermatogonial stem cells (SSCs) and to discuss the key factor that supports mouse SSC self-renewal and proliferation.
METHODSTestis cells from 4-6 days postpartum male transgenic BALB/c mce were collected by a modified two-step enzymatic digestion method and plated on 0. 2% elatin-coated tissue culture plates. The germ cells were enriched by differential adherence selections after respectively incubated for 1, 5 and 24 h and then plated on the mitomycin C-inactivated mouse embryonic fibroblast (MEF) feeder layer. The basal culture medium was StemPro-34 SFM supplemented with other 15 nutrient factors. The 20 ng/ml Glial cell line-derived neurotrophic factor (GDNF), 10 ng/ml basic fibroblast growth factor (bFGF) and 200 ng/ml GDNF-family receptor alpha 1 (GFRalpha1) were added to the serum-free medium to promote SSC proliferation. Several important surface markers and special genes were examined by immunocytochemical staining and RT-PCR analysis.
RESULTSAfter 3-4 days culture on the MEF feeder, SSCs proliferated continuously and formed typical colonies. SSCs from the BALB/c mice could be cultured in a steady state for 3 months. Immunocytochemical staining showed that Oct4 was specifically expressed in the cultured SSC nucleus and GFRalpha1 strongly expressed on the surface of the membrane. RT-PCR confirmed that the cultured SSCs expressed Oct-4, GFRalpha1, Sox2 and several other special genes resembling undifferentiated spermatogonia.
CONCLUSIONSSCs from BALB/c mice could be cultured in the improved culture system for 3 months. This culture system could help further understand the regulating mechanism of SSCs and might provide an opportunity for the treatment of male infertility by SSC transplantation.