Key features and details
- Sensitivity: 162 pg/ml
- Range: 0.08 ng/ml - 50 ng/ml
- Sample type: Plasma, Saliva, Serum
- Detection method: Colorimetric
- Assay type: Competitive
Product nameMelatonin ELISA Kit
Intra-assay Sample n Mean SD CV% 1 20 5.74ng/ml 4.31% 2 20 0.45ng/ml 13.74% Inter-assay Sample n Mean SD CV% 1 12 5.98ng/ml 7.36% 2 12 0.58ng/ml 17.54%
Sample typeSaliva, Serum, Plasma
Range0.08 ng/ml - 50 ng/ml
Sample specific recovery Sample type Average % Range Saliva 96.8 83.3% - 108.4% Serum 103 83% - 124% EDTA Plasma 101.1 90% - 112.2%
Assay time2h 00m
Assay durationMultiple steps standard assay
The Melatonin ELISA Kit (ab213978) is a complete kit for the determination of melatonin in human, mouse, rat and other sample types. The detection is independent of species, with the use of a simple, rapid extraction protocol. Please read the complete kit insert before performing this assay.
This assay allows for the easy and precise measurement of melatonin in multiple matrices with a rapid time-to-answer. Using this kit, changes in Melatonin levels can be measured in two hours, with a high level of reproducibility, specificity, and accuracy. The levels measured align with published GC / MS data, and the sensitivity of the assay is such that serum and plasma levels can be measured with only a quick extraction. This assay is independent of species, and results have been obtained from animal and fruit matrices.
In this assay samples or standards are added to wells coated with a goat anti-mouse IgG antibody. A monoclonal antibody specific to free melatonin and a solution of a biotin labeled melatonin tracer are added to the wells. The plate is incubated. During this incubation, the antibody binds to melatonin in the sample or to the tracer in a competitive manner. The plate is washed, leaving only bound melatonin and bound tracer on the plate. A solution of Horseradish Peroxidase conjugated Streptavidin (SA-HRP) is added, which binds to the biotinylated tracer. The plate is then incubated. Excess SA-HRP is washed out and TMB substrate solution is added and incubated. An HRP-catalyzed reaction generates a blue color in the solution. Stop solution is added to stop the substrate reaction. The resulting yellow color is read at 450 nm. The amount of signal is inversely proportional to the level of melatonin in the sample.
This assay is suitable for measuring melatonin in a number of matrices. Human, mouse and rat, serum and plasma and porcine serum have been validated for use, but other species may also work. Human saliva, and fruit (banana and plum) have also been validated in this assay. Other matrices, not presented in this manual, should be validated by the researcher using the extraction and assay protocol supplied.
Melatonin (N-acetyl-5-methoxytryptamine) is produced in the pineal gland and is a major component of the regulation of the circadian rhythm. In typical individuals, it is present at higher concentrations during the night, and contributes to the normal sleep-wake cycle.
Melatonin is produced from tryptophan through a number hydroxylation and methylation steps. It is metabolized in the liver, and excreted in urine as 6-hyrdoxymelatonin and 6-sulfatoxymelatonin. The Enzo Melatonin ELISA shows no cross reactivity with any of the major melatonin metabolites or precursors.
Melatonin and metabolites of melatonin, have demonstrated antioxidant and free radical scavenging potential. There is also evidence that they play a role in the regulation of reactive oxygen protein pathways. Published research shows a possible correlation to melatonin levels and the prevalence of certain cancers.
Saliva can be used to measure melatonin levels. Saliva, compared to serum or plasma, is relatively easy to obtain and does not contain many of the interfering substances present in serum and plasma. Melatonin in saliva is representative of the levels circulating throughout the body, although the exact proportion is still not fully quantified with published values ranging from 20 – 50 % of serum values. New areas of research have grown around studying melatonin and the effect on libido, luteinizing hormone (LH), follicle-stimulating hormone (FSH), and other hormone pathways. The role in cancer, sleep cycle, aging, and other areas are also growing in interest, with particular focus on melatonin receptors and the bioavailability of circulating melatonin with the increased use of melatonin as a dietary supplement. The effect on individuals that work late night shifts, and people with decreased ability to perceive light, is also of important as normal day and night cues are not present and the regulation of melatonin levels is affected.
Abcam has not and does not intend to apply for the REACH Authorisation of customers’ uses of products that contain European Authorisation list (Annex XIV) substances.
It is the responsibility of our customers to check the necessity of application of REACH Authorisation, and any other relevant authorisations, for their intended uses.
PlatformPre-coated microplate (12 x 8 well strips)
Storage instructionsPlease refer to protocols.
Components 1 x 96 tests Assay Buffer 1 x 50ml Goat anti-mouse IgG Microplate (12 x 8 wells) 1 unit Melatonin Antibody (Lyophilized) 1 vial Melatonin Conjugate 1 x 20ml Melatonin Standard (5,000ng) 1 vial Melatonin Tracer Concentrate (100X) 1 x 60µl Plate Sealer 3 units Stabilizer (50X) 1 x 1ml Stop Solution 1 x 10ml TMB Substrate 1 x 25ml Wash Buffer Concentrate (20X) 1 x 25ml
RelevanceMelatonin, the principal hormone of the pineal gland, is also produced by the retina, lens and GI tract. It is naturally synthesized from the amino acid tryptophan (via synthesis of serotonin) by the enzyme 5-hydroxyindole-O-methyltransferase. Production of melatonin by the pineal gland is under the influence of the suprachiasmatic nucleus of the hypothalamus (SCN -the site of a circadian clock) which receives information from the retina about the daily pattern of light and darkness. Melatonin can alter the timing of mammalian circadian rhythms, as well as regulate the reproductive alterations that occur in response to changes in day length in seasonally breeding mammals. Melatonin is also an extremely powerful antioxidant, with a particular role in the protection of nuclear and mitochondrial DNA. Therapeutically there may be many potential uses for melatonin such as in the treatment of various forms of some forms of depression, cancer, HIV, plus other viral diseases. Currently, Melatonin is a popular therapy for jet-lag and disturbances of sleep.
- 5 methoxy N acetyltryptamine
- N acetyl 5 methoxytryptamine
ab213978 has been referenced in 4 publications.
- Wu H et al. Effect of Simulated Geomagnetic Activity on Myocardial Ischemia/Reperfusion Injury in Rats. Braz J Cardiovasc Surg 34:674-679 (2020). PubMed: 31364342
- Milon A et al. Telocytes are localized to testis of the bank vole (Myodes glareolus) and are affected by lighting conditions and G-coupled membrane estrogen receptor (GPER) signaling. Gen Comp Endocrinol 271:39-48 (2019). PubMed: 30391242
- Kotb El-Sayed MI et al. Neural and Endocrinal Pathobiochemistry of Vitiligo: Comparative Study for a Hypothesized Mechanism. Front Endocrinol (Lausanne) 9:197 (2018). PubMed: 29922226
- Jang JH et al. Efficacy of Yokukansankachimpihange on sleep disturbance in Parkinson's disease: A study protocol of a randomized, double blind, placebo-controlled pilot trial. Medicine (Baltimore) 97:e11298 (2018). PubMed: 29953013