For research use only.
Catalog No.S1204 Synonyms: N-Acetyl-5-methoxytryptamine
CAS No. 73-31-4
Melatonin (N-Acetyl-5-methoxytryptamine) is a MT receptor agonist, used as a dietary supplement. Melatonin is a selective ATF-6 inhibitor and downregulates COX-2. Melatonin enhances mitophagy and regulates the homeostasis of apoptosis and autophagy.
Selleck's Melatonin has been cited by 16 publications
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H2O2 activates JNK through the RAC1/MAP2K7 pathway, which is inhibited by melatonin treatment. (A) GCs grown in medium containing 10 μM melatonin for 24 h were rinsed using PBS, and then incubated with 0.2 mM H2O2 for 2 h. For the inhibition of RAC1, the RAC1 specific antagonist NSC 23766 (10 μM) was added 1 h prior to H2O2 exposure. The cell lysates were collected for GST-PAK1-PBD pulldown assay of RAC1 activation (GTP-bound RAC1 levels) and immunoblotting analysis of total RAC1. (B) Western blot analysis of phosphorylated MAP2K7 (p-MAP2K7) and total MAP2K7 in GCs with the indicated treatments as described above. TUBA1A served as the control for loading. (C) The detection of JNK activity in GCs subjected to the treatments as mentioned earlier. Data represent mean ± s.e.; n = 3. **Represents P < 0.01 vs control group. ##Represents P < 0.01 vs H2O2 group. N, not significant, P > 0.05. (D) GCs transfected with scrambled control siRNA (SC siRNA) or Map2k7 siRNA were cultured with 10 μM melatonin for 24 h, washed in PBS, and then grown in medium containing 0.2 mM H2O2 for 2 h. The expression of phosphorylated MAP2K7 (p-MAP2K7) and total MAP2K7 was determined by Western blotting. TUBA1A served as the control for loading. (E) GCs transfected with scrambled control siRNA (SC siRNA) or Map2k7 siRNA for 48 h were cultured with or without 0.2 mM H2O2 for 2 h. Cell lysates were collected for Western blot analysis of RAC1 activation (GTP-RAC1 levels) by GST-PAK1-PBD pulldown and of total RAC1 levels. (F) GCs transfected with scrambled control siRNA (SC siRNA) or Map2k7 siRNA for 24 h were cultured for another 24 h in the presence or absence of 10 μM melatonin before 2 h of H2O2 (0.2 mM) incubation. Cells were then processed for JNK determination. Data represent mean ± s.e.; n = 3. **Represents P < 0.01 vs control group. ##Represents P < 0.01 vs H2O2 group. N, not significant, P > 0.05.
Reproduction, 2018, 155(3):307-319. Melatonin purchased from Selleck.
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|Description||Melatonin (N-Acetyl-5-methoxytryptamine) is a MT receptor agonist, used as a dietary supplement. Melatonin is a selective ATF-6 inhibitor and downregulates COX-2. Melatonin enhances mitophagy and regulates the homeostasis of apoptosis and autophagy.|
Melatonin interacts with the highly toxic hydroxyl radical with a rate constant equivalent to that of other highly efficient hydroxyl radical scavengers. Melatonin reportedly neutralizes hydrogen peroxide, singlet oxygen, peroxynitrite anion, nitric oxide and hypochlorous acid.  Melatonin is believed to scavenge the highly toxic hydroxyl radical, the peroxynitrite anion, and possibly the peroxyl radical. Melatonin reportedly scavenges the superoxide anion radical and it quenches singlet oxygen. Melatonin stimulates mRNA levels for superoxide dismutase and the activities of glutathione peroxidase, glutathione reductase and glucose-6-phosphate dehydrogenase (all of which are antioxidative enzymes), thereby increasing its antioxidative capacity.  Melatonin in cell-free systems has been shown to directly scavenge H2O2, singlet oxygen (1O2) and nitric oxide (NO*), with little or no ability to scavenge the superoxide anion radical (O2*-) in vitro. Melatonin also directly detoxifies the peroxynitrite anion (ONOO-) and/or peroxynitrous acid (ONOOH), or the activated form of this molecule, ONOOH*. Melatonin acts as a direct free radical scavenger with the ability to detoxify both reactive oxygen and reactive nitrogen species.  Melatonin inhibits cAMP accumulation in most of the cells examined, but the indole effects on other messengers have been often observed only in one type of the cells or tissue, until now. Melatonin also regulates the transcription factors, namely, phosphorylation of cAMP-responsive element binding protein and expression of c-Fos. 
|In vitro||DMSO||47 mg/mL (202.34 mM)|
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Clinical Trial Information
|NCT Number||Recruitment||interventions||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT04588233||Not yet recruiting||Dietary Supplement: Melatonin|Other: Placebo||Sleep Disorders in Children||Loma Linda University||April 2021||Not Applicable|
|NCT04521972||Not yet recruiting||Device: Room light/light bulb||Pregnancy Related|Labor; Poor|Uterine Contractions Weak||Michigan State University|McLaren Health Care||March 1 2021||Not Applicable|
|NCT04547439||Not yet recruiting||Drug: Melatonin|Other: Placebo||Diabetes Mellitus|Diabetic Retinopathy||University of Illinois at Chicago|University of Chicago||January 2021||Phase 2|
|NCT03995004||Not yet recruiting||Drug: Melatonin|Drug: Dexamethasone Sodium Sulphate 4mg/1mL||Effect of Drugs||The University of Hong Kong||January 2021||Phase 1|
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