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Updated: Aug 11, 2026
Murine Hind Limb Long Bone Dissection and Bone Marrow Isolation
Published on: April 14, 2016
Effect of processing time on the quality of mouse bone-marrow metaphase preparations
Abstract:
To evaluate the effect of extended incubation in phosphate-buffered saline (PBS) on the quality of mouse bone-marrow metaphase preparations, bone-marrow samples were allowed to stand in PBS at room temperature for from 15 min to 3 h before hypotonic treatment and fixation. The frequencies of sister-chromatid exchanges, the rate of cellular proliferation and the mitotic indices in these mice were not significantly affected by prolonged storage in PBS. However, slide quality decreased significantly in bone-marrow samples stored in PBS for more than 2 h. These data demonstrate that the storage of bone-marrow samples in PBS at room temperature for at least 1 h does not adversely affect the quality of routine cytogenetic data, making it more feasible to conduct studies involving large numbers of animals.
Insights
Extended storage of mouse bone marrow in phosphate-buffered saline (PBS) for up to 1 hour does not impact cytogenetic quality. This finding enhances the feasibility of large-scale animal studies.
Area of Science:
- Cytogenetics
- Animal Research
Background:
- Optimizing sample preparation is crucial for reliable cytogenetic analysis.
- Phosphate-buffered saline (PBS) is commonly used in biological sample handling.
Purpose of the Study:
- To assess the impact of extended phosphate-buffered saline (PBS) incubation on mouse bone marrow metaphase preparations.
- To determine the optimal storage duration in PBS for maintaining sample quality in cytogenetic studies.
Main Methods:
- Mouse bone marrow samples were incubated in PBS at room temperature for durations ranging from 15 minutes to 3 hours.
- Standard hypotonic treatment and fixation procedures were applied post-incubation.
- Analysis included sister-chromatid exchanges, cellular proliferation rates, and mitotic indices.
Main Results:
- Prolonged storage in PBS did not significantly alter sister-chromatid exchange frequencies, cellular proliferation rates, or mitotic indices.
- A significant decrease in slide quality was observed in samples stored in PBS for over 2 hours.
- Storage in PBS for at least 1 hour maintained the quality of routine cytogenetic data.
Conclusions:
- Mouse bone marrow samples can be stored in PBS at room temperature for up to 1 hour without compromising routine cytogenetic data quality.
- This extended storage flexibility improves the practicality of cytogenetic studies involving numerous animals.
