tyrosinase

Tyrosinase (Polyphenol oxidase) is a key rate-limiting enzyme encoded by the TYR gene that controls melanin production and catalyzes tyrosine oxidation. It is mainly found in melanosomes and plays an important role in melanogenesis, plant secondary metabolism, wound healing and immune response.

Tyrosinase-IN-2 (compound 67) is a potent inhibitor of tyrosinase, a copper-containing metalloenzyme crucial for the rate-limiting step in melanin biosynthesis and enzymatic browning processes. This compound shows promise for research into skin whitening agents and food preservatives [1].

Potassium iodide is used as the treatment of overactive thyroid and as protection of the thyroid gland from the influences of radiation from swallowed or inhaled radioactive iodine. It may be used after accidental exposure to radioactive iodine or before and after administration of medicine containing radioactive iodine.

Arbutin (p-Arbutin)(β-Arbutin) is a glycosylated hydroquinone extracted from the bearberry plant in the genus Arctostaphylos and can inhibit tyrosinase and thus prevent the formation of melanin.

Monobenzone (Benoquin) is a Depigmenting Agent. The mechanism of action of monobenzone is as a Melanin Synthesis Inhibitor. The physiologic effect of monobenzone is by means of Depigmenting Activity.

2-Hydroxy-4-methoxybenzaldehyde (4-Methoxysalicylaldehyde) is a chemical compound and an isomer of Vanillin. 2-Hydroxy-4-methoxybenzaldehyde(4-Methoxysalicylaldehyde) could be used to synthesis Urolithin M7. 2-hydroxy-4-methoxybenzaldehyde is a potent tyrosinase inhibitor from three East African medicinal plants, Mondia whitei, Rhus vulgaris Meikle, and Sclerocarya caffra Sond.

3',4'-Dihydroxyacetophenone (Qingxintong) is an active constituent of Chinese medicine. It is platelet aggregation Inhibitor and also has anti-arrhythmia activity.

3,4-Dimethoxyphenol (4-Hydroxyveratrole) is an active biochemical.

1. Oxyresveratro can inhibit tyrosinase activity. 2. Oxyresveratro is useful to trauma models, as toxicity to glia could be beneficial by inhibiting reactive gliosis. 3. Oxyresveratrol (trans-Oxyresveratrol) has antioxidant activity, can reduce neuronal oxidative damage and protect hepatocytes against oxidative stress and mitochondrial dysfunction, which may be associated with activation of Nrf2.

Kojic acid is a fungal metabolite that inhibits tyrosinase, an enzyme involved in melanin synthesis, with an IC50 value of 30.6 μM for mushroom tyrosinase.

2-Ketoglutaric acid is a key molecule in the tricarboxylic acid cycle,is also connected to glutamic acid and glutamine metabolisms through the transamination reactions.

DeoxyArbutin(IC50=50 nM) inhibits tyrosinase activity reversibly.

3,5-Dimethoxyphenol (Phloroglucinol dimethyl ether) as a marker of Taxus poisoning, being present in all species of Taxus. It has potent tyrosinase-inhibiting activity.

3-O-Ethyl-L-ascorbic acid is a cosmetic tyrosinase inhibitor with whitening ability and is a stabilized vitamin C derivative. It also has antioxidant properties.

1. 2,5-Dihydroxyacetophenone (Quinacetophenone) possess anti-anxiety, and neuroprotective qualities. 2. 2,5-Dihydroxyacetophenone (Quinacetophenone) reatment can induce a sustained activation of JNK, ERK1 2, and p38 MAPKs, it also can potentiate the pro-apoptotic and anti-proliferative effects of bortezomib in U266 cells. 3. 2,5-Dihydroxyacetophenone (Quinacetophenone) has anti-inflammatory activity in activated macrophages, raising the possibility that this compound has a therapeutic potential for inflammatory conditions. 4. 2,5-Dihydroxyacetophenone (Quinacetophenone) is an uncompetitive inhibitor of murine tyrosinase (K(I) 0.28mm), it strongly inhibits both melanogenesis and cellular tyrosinase activity in vitro in 3-isobutyl-1-methylxanthin-stimulated B16 mouse melanoma cells or in vivo in zebrafish and mouse models.

D-Tyrosine, the D-isomer of tyrosine, acts as a negative regulator of melanin synthesis by inhibiting tyrosinase activity. Furthermore, D-Tyrosine also inhibits biofilm formation and induces the self-dispersal of biofilms, while not affecting bacterial growth.

Calycosin (Cyclosin) acts as a selective estrogen receptor modulator. Calycosin induces apoptosis in human ovarian cancer SKOV3 cells by activating caspases and Bcl-2 family proteins. Calycosin suppresses breast cancer cell growth via ERβ-dependent regulation of IGF-1R, p38 MAPK and PI3K Akt pathways. Calycosin has antineoplastic effects against osteosarcoma through inducing apoptosis showing in vitro and in vivo investigations. Calycosin was shown to induce angiogenesis in human umbilical vein endothelial cell cultures (HUVEC) in vitro. Calycosin may be an effective skin-lightening agent that regulates the expression of melanogenic enzymes. Calycosin exhibited tyrosinase inhibitory activity with an IC(50) value of 38.4 microM.

3-(2,4-Dihydroxyphenyl)propanoic acid (Hydroumbellic acid) is a predicted metabolite generated by BioTransformer1 from the metabolism of 3-(2,4-dihydroxyphenyl)prop-2-enoic acid. It is produced by the abkar1 enzyme via a reduction-of-alpha-beta-unsaturated-compounds-pattern1 reaction in human gut microbiota.

Tyrosinase-IN-37 (Compound 3c) is a potent inhibitor of tyrosinase, with an IC50 value of 1.02 μM, which is 14 times more effective than kojic acid (IC50 of 14.74 μM). This compound effectively prevents the browning of Rosa roxburghii and can also inhibit browning not caused by tyrosinase.

Tyrosinase-IN-40 (Compound 9r) is a competitive inhibitor of tyrosinase, boasting an IC50 value of 17.02 µM and a Ki value of 14.87 µM. This compound also exhibits antioxidant activity and can be utilized in studies related to melanin.

p-Tolualdehyde is a RIFM flavor that shows inhibition of mushroom tyrosinase.

1. Mulberroside has nephroprotective, hypoglycemic, and antidiabetic effects. 2. Mulberroside A is a glycosylated stilbene of oxyresveratrol; thus, the deglycosylation of Mulberroside A resulted in enhanced inhibition of melanogenesis. 3. Mulberroside A has anti-inflammatory antiapoptotic effects. by decreasing the expressions of tumor necrosis factor-α (TNF-α), interleukin (IL)-1β, and IL-6 and inhibiting the activation of NALP3, caspase-1, and nuclear factor-κB and the phosphorylation of extracellular signal-regulated protein kinases, the c-Jun N-terminal kinase, and p38.

Gnetol competitivity inhibits butyrylcholinesterase (IC50: 1.3 uM). Gnetol has a strong inhibitory effect on murine tyrosinase activity. Gnetol significantly suppresses melanin biosynthesis in murine B16 melanoma cells. It is active in the inhibition of a

Flanvotumab (IMC-20D7S) is a humanized monoclonal antibody targeting tyrosinase-related protein (TYRP1), exhibiting potent antitumor activity through natural killer-mediated and antibody-dependent cell-mediated cytotoxicity (ADCC).