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Effect of serial passage on gene expression in MC3T3-E1 preosteoblastic cells: a microarray study
W Huang1, B Carlsen, G H Rudkin
1Plastic Surgery Section, VA Greater Los Angeles Healthcare System, Los Angeles, California, 90073, USA.
Biochemical and Biophysical Research Communications
|March 13, 2001
Summary
Serial passage of osteoblastic cells reduces their function. Gene expression changes significantly with cell passage, potentially impacting bone regeneration and aging.
Area of Science:
- Cell Biology
- Molecular Biology
- Bone Biology
Background:
- Osteoblastic function, crucial for bone formation, declines with serial passage in MC3T3-E1 cells.
- This decline is associated with changes in cellular characteristics, suggesting underlying molecular alterations.
Purpose of the Study:
- To identify genes responsible for the decreased osteoblastic function observed in high-passage MC3T3-E1 cells.
- To investigate passage-dependent gene expression changes in osteoblastic cells.
Main Methods:
- Utilized cDNA microarray analysis to compare gene expression profiles of MC3T3-E1 cells at passage 20 versus passage 60.
- Examined the expression patterns of 2000 selected genes simultaneously.
- Verified and quantified gene expression changes using Northern blot analysis.
Main Results:
- Identified significant changes in the steady-state abundance of 27 mRNAs between low- and high-passage cells.
- Discovered 17 known genes, 4 ESTs with homology, and 6 novel genes exhibiting altered expression.
- Northern blot analysis revealed more significant up- and down-regulation than initially detected by microarray.
Conclusions:
- Serial passage induces significant alterations in gene expression within osteoblastic cells.
- These passage-dependent gene expression changes may contribute to reduced osteoblastic function and impaired bone regeneration in aged cells.
- The study highlights potential roles of identified genes in the process of bone aging.
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