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Ascorbate on cell growth and differentiation

F J Alcaín¹, M I Burón

¹Departamento de Biología Celular, Facultad de Ciencias, Universidad de Córdoba, Spain.

Journal of Bioenergetics and Biomembranes

|August 1, 1994

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Ascorbate (vitamin C) exhibits dual effects on tumor cells, directly killing them or stimulating growth, with L-ascorbate uniquely promoting differentiation and collagen production.

Area of Science:

Biochemistry
Cell Biology
Nutritional Science

Background:

Ascorbate (vitamin C) is an essential nutrient vital for numerous cellular functions, including cell growth and differentiation.
Its role in cancer is complex, with potential to either inhibit or promote tumor cell proliferation depending on cell type.

Purpose of the Study:

To investigate the differential effects of ascorbate isomers on tumor cell growth and differentiation.
To elucidate the mechanisms underlying ascorbate's influence on cell proliferation and specific cellular processes like collagen synthesis.

Main Methods:

Comparative analysis of L-ascorbate, D-ascorbate, and isoascorbate on various tumor cell lines.
Assessment of cytotoxic versus cytostatic effects of ascorbate isomers.
Examination of L-ascorbate's impact on gene expression related to differentiation and collagen production in vitro.

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Main Results:

Ascorbate isomers, including D-ascorbate and isoascorbate, demonstrated a direct cytotoxic effect on tumor cells, more potent than L-ascorbate.
Only L-ascorbate stimulated cell growth and in vitro differentiation of mesenchyme-derived cells.
L-ascorbate was found to enhance collagen matrix production by influencing gene transcription, mRNA stabilization, hydroxylation, and secretion.

Conclusions:

Ascorbate exerts both cytotoxic and cytostatic effects on tumor cells, with isomers other than L-ascorbate showing greater direct cell-killing ability.
L-ascorbate plays a unique role in promoting cell differentiation and extracellular matrix formation, crucial for maintaining tissue integrity and potentially preventing cancer progression.