Abstract
Purpose
This study aims to proliferate spermatogonial stem cells (SSCs) and compare the in-vitro effects of laminin and growth factors on the proliferation of adult human SSC.
Methods
Isolated testicular cells were cultured in DMEM supplemented with 5 % fetal calf serum (FCS). During the culture, enriched spermatogonial cells were treated with a combination of glial cell line-derived neurotrophic factor (GDNF), basic fibroblast growth factor (bFGF), epidermal growth factor (EGF) and mouse leukemia inhibitory factor (LIF) in the presence or absence of human placental laminin-coated dishes. Cluster assay was performed during culture. Presence of spermatogonia was determined by an ultrastructural study of the cell clusters, reverse transcription polymerase chain reaction (RT-PCR) for spermatogonial markers and xenotransplantation to the testes of busulfan-treated recipient mice. Statistical significance between mean values was determined using statistical ANOVA tests.
Results
The findings indicated that the addition of GDNF, bFGF, EGF and LIF on laminin-coated dishes significantly increased in-vitro spermatogonial cell cluster formation in comparison with the control group (p ≤ 0.001). The expression of spermatogonial markers was maintained throughout the culture period. Furthermore, a transplantation experiment showed the presence of SSC among the cultured cells. In addition, a transmission electron microscopy (TEM) study suggested the presence of spermatogonial cells of typical morphology among the cluster cells.
Conclusions
It can be concluded that human SSCs obtained from non-obstructive azoospermic (NOA) patients had the ability to self-renew in the culture system. This system can be used for the propagation of a small number of these cells from small biopsies.
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Abbreviations
- SSCs:
-
spermatogonial stem cells
- GDNF:
-
glial cell line-derived neurotrophic factor
- bFGF:
-
basic fibroblast growth factor
- EGF:
-
epidermal growth factor
- LIF:
-
leukemia inhibitory factor
- NOA:
-
non-obstructive azoospermic
- RT-PCR:
-
reverse transcription polymerase chain reaction
- TESE:
-
Testis biopsies
- PBS:
-
phosphate buffered saline solution
- FCS:
-
fetal calf serum
- PLZF:
-
promyelocytic leukaemia zinc-finger
- DAZL:
-
deleted in azoospermia-like
- Oct4:
-
Octamer-binding transcription factor 4
- ITGB1:
-
β1-integrin
- ITGA6:
-
α6-integrin
- TEM:
-
transmission electron microscopy
- BrdU:
-
5-Bromo-2-deoxyuridine
- ES-like:
-
embryonic stem cell-like
- GSC:
-
germ-line stem cells
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Acknowledgments
We would like to thank all the patients who donated tissues for research to the lab of Royan institute. We also appreciate the contributions of H. Sadri-ardekani, S.C. Mizrak, R. Aflatounian, and MR. Hadjighassem for comments; M. Moraveji, H. Baharvand, H. Azizi, P. Eftekhari-Yazdi, T. Mirzapour, M. Soleimani, M. Lotfipanah for technical and administrative support; and MR. Akhoond for data analyzing. This work was supported by a grant from Royan Institute, Tehran, Iran (Number: 158-3).
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Proliferation of SSCs obtained from NOA patients are increased by GDNF, bFGF, EGF and LIF in the presence or absence of laminin.
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Koruji, M., Shahverdi, A., Janan, A. et al. Proliferation of small number of human spermatogonial stem cells obtained from azoospermic patients. J Assist Reprod Genet 29, 957–967 (2012). https://doi.org/10.1007/s10815-012-9817-8
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DOI: https://doi.org/10.1007/s10815-012-9817-8