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Molecular and Cellular Biochemistry

, Volume 452, Issue 1–2, pp 71–82 | Cite as

Molecular changes to the rat renal cotransporters PEPT1 and PEPT2 due to ageing

  • Othman A. Alghamdi
  • Nicola KingEmail author
  • Nicholas M. Andronicos
  • Graham L. Jones
  • Belal Chami
  • Paul K. Witting
  • Pierre D. J. Moens
Article

Abstract

Renal PEPT1 and PEPT2 cotransporters play an important role in the balance of circulating body oligopeptides and selected peptidomimetic drugs. We aim to comprehensively characterise age-related changes of the renal PEPT cotransporters at the gene, protein, and functional level. Brush border membrane vesicles (BBMV) and outer medulla membrane vesicles (OMMV) were isolated from the kidneys of young, middle-aged and old rats. The protein expression of PEPT1 was not only increased in BBMV from old rats, but PEPT1 also appeared in OMMV from middle-aged and old rats. SLC15A1 gene expression in the renal cortex increased in middle-aged group. PEPT2 protein expression was not only increased with ageing, but PEPT2 also was found in BBMV from middle-aged and old groups. SLC15A2 gene expression in the renal outer medulla increased in the old group. These changes in the expressions and localisations of PEPT1 and PEPT2 could explain the changes to transport activity in BBMV and OMMV. These findings provide novel insights that would be useful for maintaining protein nutrition and optimising the delivery of some peptidomimetic drugs in elderly individuals.

Keywords

Ageing Oligopeptide transport PEPT1 PEPT2 Kidney 

Notes

Acknowledgements

We would like to thank Mr. Brian Cross and Mr. Jonathon Clay for their excellent technical assistance. This work was supported by University of New England (unnumbered grant), Australian Research Council (DP160102063) and University of Jeddah (Unnumbered Grant).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All applicable international, national and/or institutional guidelines for the care and use of animals were followed.

Supplementary material

11010_2018_3413_MOESM1_ESM.docx (280 kb)
Supplementary material 1 (DOCX 280 KB)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Science and TechnologyUniversity of New EnglandArmidaleAustralia
  2. 2.School of Biomedical SciencesUniversity of PlymouthPlymouthUK
  3. 3.Discipline of Pathology, Sydney Medical School, Charles Perkins CentreThe University of SydneySydneyAustralia
  4. 4.Department of Biological Sciences, Faculty of Science, Centre for Science and Medical ResearchUniversity of JeddahJeddahSaudi Arabia

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