抗坏血酸钠（Sodium L-ascorbate）是一种电子供体，是一种内源性抗氧化剂。抗坏血酸钠选择性抑制 Cav3.2 通道，IC50 为 6.5 μM.抗坏血酸钠也是一种胶原蛋白沉积增强剂和弹性生成抑制剂。
L-Ascorbic acid sodium salt is a more bioavailable form of vitamin C that is an antioxidant agent.
L-Ascorbic acid sodium salt, a known enhancer of collagen deposition, has also been identified as an inhibitor of elastogenesis[1]. The conditioned?medium?for?B16F10?cells significantly inhibits?cell?apoptosis?induced by?sodium?L-ascorbate (10 mM), and the effective ingredients in the?medium?show a relative molecular mass below 5,000[2].
Tg rats treated with sodium?L-ascorbate show a higher incidence of carcinoma (29.6%), compared to those without sodium?L-ascorbate (15.4%). Independent of the sodium?L-ascorbate treatment, transgenic rats exhibit various kinds of malignant tumors in various organs[3]. After 12 weeks of PEITC-treatment, both simple hyperplasia and papillary or nodular (PN) hyperplasia have developed in all animals, but the majority of these lesions have disappeared at week 48, irrespective of the sodium?L-ascorbate-treatment. The same lesions after 24 weeks of PEITC-treatment have progressed to dysplasia and carcinoma, in a small number of cases by week 48, but enhancement by the sodium?L-ascorbate-treatment is evident only with simple hyperplasias and PN hyperplasias in rats[4].
参考文献:
[1]. Hinek A, et al. Sodium L-ascorbate enhances elastic fibers deposition by fibroblasts from normal and pathologic human skin. J Dermatol Sci. 2014 Sep;75(3):173-82.
[2]. Yang X, et al. Mouse melanoma cell line B16F10-derived conditioned medium inhibits sodium L-ascorbate-induced B16F10 cell apoptosis. Nan Fang Yi Ke Da Xue Xue Bao. 2012 Feb;32(2):146-50.
[3]. Morimura K, et al. Lack of urinary bladder carcinogenicity of sodium L-ascorbate in human c-Ha-ras proto-oncogene transgenic rats. Toxicol Pathol. 2005;33(7):764-7.
[4]. Takagi H, et al. Limited tumor-initiating activity of phenylethyl isothiocyanate by promotion with sodium L-ascorbate in a rat two-stage urinary bladder carcinogenesis model. Cancer Lett. 2005 Mar 10;219(2):147-53.
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Animal experiment: |
A total of 40 7-week-old male Tg rats are divided into 2 groups. Twenty-seven (group 1) and 13 (group 2) rats are given a powdered MF diet with or without 5% sodium?L-ascorbate, respectively. Similarly, a total of 42 7-week-old male Non-tg rats are divided into 2 groups, and 30 (group 3) and 12 (group 4) animals are given a diet with or without 5% sodium?L-ascorbate, respectively. |
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参考文献: [1]. Hinek A, et al. Sodium L-ascorbate enhances elastic fibers deposition by fibroblasts from normal and pathologic human skin. J Dermatol Sci. 2014 Sep;75(3):173-82. |
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