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Isolation and Expansion of Neurospheres from Postnatal (P1−3) Mouse Neurogenic Niches
Published on: May 23, 2020
Optimal time for passaging neurospheres based on primary neural stem cell cultures
Fangling Xiong1, Huasong Gao, Yan Zhen
1Department of Neurosurgery, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, 226001, China.
Cytotechnology
|August 23, 2011
Summary
Optimal subculturing of neural stem cells (NSCs) is crucial for research. Day 7 passaging yields more neurospheres and better cell function compared to days 5 or 9, supporting neural stem cell regeneration studies.
Area of Science:
- Neuroscience
- Stem Cell Biology
Background:
- Cultured neural stem cells (NSCs) are vital for studying central nervous system disorders and regeneration.
- Subculturing neurospheres is essential for maintaining NSC cultures but often overlooked.
Purpose of the Study:
- To determine the optimal passaging schedule for primary cultured neural stem cells.
- To evaluate the impact of different passaging times on neurosphere formation and cell characteristics.
Main Methods:
- Neural stem cells were cultured and passaged on day 5, 7, or 9.
- Neurosphere size and quantity were assessed.
- Cell metabolic activity (MTT assay) and proliferation (colony-forming assay) were measured.
- Cell cycle phase distribution and key protein expression (p16INK4a, cyclin D1) were analyzed.
Main Results:
- Passaging on day 7 resulted in a higher yield of neurospheres (200-250 μm) compared to days 5 or 9.
- Extended culture times (day 9) reduced cell metabolic activity, proliferation, and neuronal differentiation potential.
- Prolonged culture led to increased G0/G1 phase cells and higher p16INK4a expression, with lower cyclin D1 levels.
Conclusions:
- The optimal time for subculturing aggregated neural stem cells is day 7 of primary culture.
- Adhering to an optimal passaging schedule is critical for maintaining NSC viability, proliferation, and differentiation capacity for research applications.
