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Ascorbic acid and proliferation of cultured rabbit keratocytes
1Department of Ophthalmology, Wakayama Medical College, Japan.
Cornea
|May 1, 1993
Summary
L-ascorbic acid 2-phosphate (P-Asc) and ascorbate promote rabbit keratocyte growth. P-Asc shows lower toxicity than ascorbate, suggesting its stability is beneficial for cell culture applications.
Area of Science:
- Cell Biology
- Biochemistry
- Ophthalmology
Background:
- Ascorbate (Vitamin C) is crucial for cellular functions.
- L-ascorbic acid 2-phosphate (P-Asc) is a more stable ascorbate derivative.
- Keratocytes are corneal stromal cells vital for eye health.
Purpose of the Study:
- To investigate the effects of P-Asc and ascorbate on cultured rabbit keratocyte growth.
- To compare the efficacy and toxicity of P-Asc versus ascorbate.
- To explore the synergistic effects of P-Asc with epidermal growth factor.
Main Methods:
- Rabbit keratocytes were cultured for 12 days.
- Cell growth was assessed in the presence of varying concentrations of P-Asc and ascorbate.
- Combined treatment with P-Asc and mouse epidermal growth factor was evaluated.
Main Results:
- Low concentrations (0.05-0.1 mM) of P-Asc and 0.05 mM ascorbate enhanced keratocyte growth.
- Higher ascorbate concentrations (0.1-1.0 mM) exhibited cytotoxicity.
- P-Asc demonstrated a wider safety margin, with no increased toxicity up to 1.0 mM.
- Combined P-Asc and epidermal growth factor yielded greater growth stimulation than individual treatments.
Conclusions:
- P-Asc is a less toxic and effective agent for promoting rabbit keratocyte proliferation compared to ascorbate.
- The stability of P-Asc likely contributes to its reduced cytotoxicity.
- P-Asc and epidermal growth factor act through distinct pathways to stimulate keratocyte growth, offering potential for combined therapeutic strategies.