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Mutations in Homocysteine Metabolism Genes Increase Keratin N-Homocysteinylation and Damage in Mice
Joint Authors
Borowczyk, Kamila
Wróblewski, Jacek
Suliburska, Joanna
Akahoshi, Noriyuki
Ishii, Isao
Jakubowski, Hieronim
Source
International Journal of Genomics
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-09-23
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
Genetic or nutritional deficiencies in homocysteine (Hcy) metabolism increase Hcy-thiolactone, which causes protein damage by forming isopetide bonds with lysine residues, generating N-Hcy-protein.
In the present work, we studied the prevalence and genetic determinants of keratin damage caused by homocysteinylation.
We found that in mammals and birds, 35 to 98% of Hcy was bound to hair keratin via amide or isopeptide bond (Hcy-keratin), while 2 to 65% was S-Hcy-keratin.
A major fraction of hair Hcy-keratin (56% to 93%), significantly higher in birds than in mammals, was sodium dodecyl sulfate-insoluble.
Genetic hyperhomocysteinemia significantly increased N-Hcy-keratin levels in the mouse pelage.
N-Hcy-keratin was elevated 3.5-, 6.3-, and 11.7-fold in hair from Mthfr−/−, Cse−/−, or Cbs−/− mice, respectively.
The accumulation of N-Hcy in hair keratin led to a progressive reduction of N-Hcy-keratin solubility in sodium dodecyl sulfate, from 0.39 ± 0.04 in wild-type mice to 0.19 ± 0.03, 0.14 ± 0.01, and 0.07 ± 0.03 in Mthfr−/−, Cse−/−, or Cbs−/−animals, respectively.
N-Hcy-keratin accelerated aggregation of unmodified keratin in Cbs−/− mouse hair.
Keratin methionine, copper, and iron levels in mouse hair were not affected by hyperhomocysteinemia.
These findings provide evidence that pelage keratin is N-homocysteinylated in vivo in mammals and birds, and that this process causes keratin damage, manifested by a reduced solubility.
American Psychological Association (APA)
Borowczyk, Kamila& Wróblewski, Jacek& Suliburska, Joanna& Akahoshi, Noriyuki& Ishii, Isao& Jakubowski, Hieronim. 2018. Mutations in Homocysteine Metabolism Genes Increase Keratin N-Homocysteinylation and Damage in Mice. International Journal of Genomics،Vol. 2018, no. 2018, pp.1-7.
https://search.emarefa.net/detail/BIM-1172838
Modern Language Association (MLA)
Borowczyk, Kamila…[et al.]. Mutations in Homocysteine Metabolism Genes Increase Keratin N-Homocysteinylation and Damage in Mice. International Journal of Genomics No. 2018 (2018), pp.1-7.
https://search.emarefa.net/detail/BIM-1172838
American Medical Association (AMA)
Borowczyk, Kamila& Wróblewski, Jacek& Suliburska, Joanna& Akahoshi, Noriyuki& Ishii, Isao& Jakubowski, Hieronim. Mutations in Homocysteine Metabolism Genes Increase Keratin N-Homocysteinylation and Damage in Mice. International Journal of Genomics. 2018. Vol. 2018, no. 2018, pp.1-7.
https://search.emarefa.net/detail/BIM-1172838
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1172838