69614-04-6Relevant articles and documents
(S)-Histidine: The ideal precursor for a novel family of chiral aminoacid and peptidic ionic liquids
Guillen, Frédéric,Brégeon, Delphine,Plaquevent, Jean-Christophe
, p. 1245 - 1248 (2006)
(S)-Histidine is shown to be a powerful chiral precursor for the construction of a new series of imidazolium-containing chiral ionic liquids, in which the chiral bifunctional unit of the aminoacid remains unchanged. These ionic materials can be used as building blocks for the synthesis of peptidic ionic liquids.
Carnosine protects cardiac myocytes against lipid peroxidation products
Zhao, Jingjing,Posa, Dheeraj Kumar,Kumar, Vijay,Hoetker, David,Kumar, Amit,Ganesan, Smirthy,Riggs, Daniel W.,Bhatnagar, Aruni,Wempe, Michael F.,Baba, Shahid P.
, p. 123 - 138 (2018/11/23)
Endogenous histidyl dipeptides such as carnosine (β-alanine-l-histidine) form conjugates with lipid peroxidation products such as 4-hydroxy-trans-2-nonenal (HNE and acrolein), chelate metals, and protect against myocardial ischemic injury. Nevertheless, it is unclear whether these peptides protect against cardiac injury by directly reacting with lipid peroxidation products. Hence, to examine whether changes in the structure of carnosine could affect its aldehyde reactivity and metal chelating ability, we synthesized methylated analogs of carnosine, balenine (β-alanine-Nτ-methylhistidine) and dimethyl balenine (DMB), and measured their aldehyde reactivity and metal chelating properties. We found that methylation of Nτ residue of imidazole ring (balenine) or trimethylation of carnosine backbone at Nτ residue of imidazole ring and terminal amine group dimethyl balenine (DMB) abolishes the ability of these peptides to react with HNE. Incubation of balenine with acrolein resulted in the formation of single product (m/z 297), whereas DMB did not react with acrolein. In comparison with carnosine, balenine exhibited moderate acrolein quenching capacity. The Fe2+ chelating ability of balenine was higher than that of carnosine, whereas DMB lacked chelating capacity. Pretreatment of cardiac myocytes with carnosine increased the mean lifetime of myocytes superfused with HNE or acrolein compared with balenine or DMB. Collectively, these results suggest that carnosine protects cardiac myocytes against HNE and acrolein toxicity by directly reacting with these aldehydes. This reaction involves both the amino group of β-alanyl residue and the imidazole residue of l-histidine. Methylation of these sites prevents or abolishes the aldehyde reactivity of carnosine, alters its metal-chelating property, and diminishes its ability to prevent electrophilic injury.
Preparation method of N(pi)-methyl-L-histidine derivative and application thereof to synthesis of whale carnosine
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Paragraph 0042-0044, (2019/01/08)
The invention relates to a preparation method of an N(pi)-methyl-L-histidine derivative and a method for preparing anserine from the synthesized N(pi)-methyl-L-histidine derivative. By the preparationmethod, raw materials are cheap and easy to obtain, the selectivity is good and the yield is high; the operation is simple and easy to implement, a technology is stable, the control is easy, treatment after a reaction is convenient, the product yield is good, the purity is high, and the preparation method can be economically and conveniently applied to industrial production.
