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Cited by 472

The DOI matches its Crossref record; 107 of the 107 references it cites were found in a registry or an index.

Kynuramines, metabolites of melatonin and other indoles: the resurrection of an almost forgotten class of biogenic amines

Hardeland, Rüdiger, Tan, Dun‐Xian, Reiter, Russel J.·2009·Journal of Pineal Research

Abstract

Abstract: Kynuramines represent their own class of biogenic amines. They are formed either by decarboxylation of kynurenines or pyrrole ring cleavage of indoleamines.N2‐formylated compounds formed in this last reaction can be deformylated either enzymatically by arylamine formamidases or hemoperoxidases, or photochemically. The earlier literature mainly focussed on cardiovascular effects of kynuramine, 5‐hydroxykynuramine and their N1,N1‐dimethylated analogs, including indirect effects via release of catecholamines or acetylcholine and interference with serotonin receptors. After the discovery of N1‐acetyl‐N2‐formyl‐5‐methoxykynuramine (AFMK) and N1‐acetyl‐5‐methoxykynuramine (AMK) as major brain metabolites of melatonin, these compounds became of particular interest. They were shown to be produced enzymatically, pseudoenzymatically, by various free radical‐mediated and via photochemical processes. In recent years, AFMK and AMK were shown to scavenge reactive oxygen and nitrogen species, thereby forming several newly discovered 3‐indolinone, cinnolinone and quinazoline compounds, and to protect tissues from damage by reactive intermediates in various models. AMK is of special interest due to its properties as a potent cyclooxygenase inhibitor, NO scavenger forming a stable nitrosation product, inhibitor and/or downregulator of neuronal and inducible NO synthases, and a mitochondrial metabolism modulator. AMK easily interacts with aromates, forms adducts with tyrosyl and tryptophanyl residues, and may modify proteins.

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Crossref · 10.1111/j.1600-079x.2009.00701.x

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Metadata

Authors
Hardeland, R., Tan, D., & Reiter, R. J.
Venue
Journal of Pineal Research
Publisher
Wiley
Published
2009-08-02
Volume
47
Issue
2
Pages
109-126
ISSN
  • 0742-3098 (ISSN-L)
  • 1600-079X
OpenAlex
W1988934115
Cited by
472
References
107
FWCI
17.61
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Kynuramines, metabolites of melatonin and other indoles: the resurrection of an almost forgotten class of biogenic amines. https://app.cochat.ai/papers/10.1111/j.1600-079x.2009.00701.x
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Hardeland, R., Tan, D., & Reiter, R. J. (2009). Kynuramines, metabolites of melatonin and other indoles: the resurrection of an almost forgotten class of biogenic amines. Journal of Pineal Research. https://doi.org/10.1111/j.1600-079x.2009.00701.x

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.