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Karyotype changes in cultured human corneal endothelial cells
Takashi Miyai1, Yoko Maruyama, Yasuhiro Osakabe
1Miyata Eye Hospital, Miyakonojo, Japan.
Molecular Vision
|May 30, 2008
Summary
Donor age correlates with chromosomal abnormalities in cultured human corneal endothelial cells (HCECs). Younger donors are recommended for HCECs used in clinical therapies to minimize aneuploidy risks.
Area of Science:
- Ophthalmology
- Cell Biology
- Genetics
Background:
- Cultured human corneal endothelial cells (HCECs) are vital for treating corneal diseases.
- Understanding karyotype stability in cultured HCECs is crucial for their clinical application.
Purpose of the Study:
- To investigate chromosomal (karyotype) changes in HCECs during in vitro culture.
- To determine the correlation between donor age and aneuploidy frequency in cultured HCECs.
Main Methods:
- HCECs were isolated from 20 human donors (ages 2-77) and cultured.
- G-band karyotyping was performed at the third and fifth passages.
- Spearman's correlation analysis assessed the relationship between donor age and aneuploidy frequency.
Main Results:
- Aneuploidy, including sex chromosome loss and trisomies (e.g., chromosome 8, 21), was observed in cultured HCECs.
- The frequency of aneuploid cells showed a statistically significant positive correlation with donor age at the fifth passage (R=0.653, p=0.042).
Conclusions:
- Donor age is a significant factor influencing karyotype stability in cultured HCECs.
- HCECs for clinical use should ideally be sourced from younger donors.
- Karyotyping is essential before the clinical application of cultured HCECs to ensure safety and efficacy.
