Kojic acid

Catalog No.S5174 Batch:S517401

Technical Data

Formula	C₆H₆O₄
Molecular Weight	142.11	CAS No.	501-30-4
Solubility (25°C)*	In vitro	DMSO	28 mg/mL (197.03 mM)
		Water	25 mg/mL (175.92 mM)

* <1 mg/ml means slightly soluble or insoluble. * Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations. * Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description

Kojic acid is a fungal metabolite that inhibits tyrosinase with an IC50 value of 30.6 µM for mushroom tyrosinase. It is a synthetic intermediate used for production of food additives.

Targets

Tyrosinase ^[2]

0.28 mM

In vitro

Kojic acid (KA) acts as a good chelator of transition metal ions such as Cu2+ and Fe3+ and a scavenger of free radicals. Kojic acid shows a competitive inhibitory effect on the monophenolase activity and a mixed inhibitory effect on the diphenolase activity of mushroom tyrosinase^[1]. Kojic acid could highly protect Chinese hamster ovary (CHO) cells against ionizing radiation with low toxicity^[3].

In vivo

Kojic acid exerts its radioprotective effects on lethal or sub-lethal irradiation induced damages in mice^[3].

Protocol (from reference)

Cell Assay:^{^[1]}	Cell lines CHO cells Concentrations 0, 0.1, 1, 10, 100, 1000, 1500, 2500 μg/ml Incubation Time 72 h Method CHO cells are incubated in RPMI 1640 medium containing 10% (v/v) fetal bovine serum, and maintained at 37°C in a 5% CO2 incubator. For cytotoxicity assay, CHO cells are seeded in 96-well plates at a density of 2500 cells per well in 180 μl medium. Then, 20 μl of Kojic acid stock solution are added to each well to make sure Kojic acid at the final concentrations of 0, 0.1, 1, 10, 100, 1000, 1500, 2500 μg/ml. After cultured for 72 h, each well of the cells is added with 20 μl MTT (5 mg/mL), which is dissolved in sterile Phosphate Buffered Saline (pH 7.4) and incubated for 4 h at 37°C. Then thesupernatant is discarded and 200 μl DMSO is added to each well. The mixture is sufficiently oscillated in the dark place for 15 min. The optical density values of wells are measured at 492 nm.

Cell Assay:^{^[1]}

Cell lines
CHO cells
Concentrations
0, 0.1, 1, 10, 100, 1000, 1500, 2500 μg/ml
Incubation Time
72 h
Method
CHO cells are incubated in RPMI 1640 medium containing 10% (v/v) fetal bovine serum, and maintained at 37°C in a 5% CO2 incubator. For cytotoxicity assay, CHO cells are seeded in 96-well plates at a density of 2500 cells per well in 180 μl medium. Then, 20 μl of Kojic acid stock solution are added to each well to make sure Kojic acid at the final concentrations of 0, 0.1, 1, 10, 100, 1000, 1500, 2500 μg/ml. After cultured for 72 h, each well of the cells is added with 20 μl MTT (5 mg/mL), which is dissolved in sterile Phosphate Buffered Saline (pH 7.4) and incubated for 4 h at 37°C. Then thesupernatant is discarded and 200 μl DMSO is added to each well. The mixture is sufficiently oscillated in the dark place for 15 min. The optical density values of wells are measured at 492 nm.

References

Selleck's Kojic acid has been cited by 1 publication

Inhibition of NAT10 Suppresses Melanogenesis and Melanoma Growth by Attenuating Microphthalmia-Associated Transcription Factor (MITF) Expression. [ Int J Mol Sci, 2017, 18(9)]	PubMed: 28880216

Inhibition of NAT10 Suppresses Melanogenesis and Melanoma Growth by Attenuating Microphthalmia-Associated Transcription Factor (MITF) Expression. [ Int J Mol Sci, 2017, 18(9)]

PubMed: 28880216

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