Conjugated linoleic acid enhances transepithelial calcium transport in human intestinal-like Caco-2 cells: An insight into molecular changes

E.F. Murphy, C. Jewell, G.J.E.J. Hooiveld, M.R. Müller, K.D. Cashman

Research output: Contribution to journalArticleAcademicpeer-review

22 Citations (Scopus)

Abstract

Conjugated linoleic acid (CLA) has been shown to enhance paracellular and transcellular Ca transport across human intestinal-like Caco-2 cell monolayers. The mechanisms of action, however, are still unclear. Therefore, this study investigated the molecular mechanisms underlying CLA-induced stimulation of Ca transport by use of preliminary microarray data together with more detailed and comprehensive quantitative reverse transcriptase-PCR analysis. While molecular expression of junctional adhesion molecule (JAM), ZO-2, ZO-3, claudin 2 and claudin 3 were unaltered, ZO-1, occludin, and claudin 4 were all up-regulated (1.6, 1.6, 2.4-fold, respectively; P <0.001 - 0.01) and claudin 1 down-regulated (2.5-fold; P <0.05) by trans-10, cis-12 CLA, which may underpin its effects on tight-junction function and paracellular Ca transport. On the other hand, expression of key genes involved in transcellular Ca transport (CaT1, ECaC1, calbindin D9k, vitamin D receptor and PMCA) were unaffected by trans-10, cis-12 CLA. The mechanism by which CLA enhances transcellular Ca transport remains unclear.
Original languageEnglish
Pages (from-to)295-301
JournalProstaglandins Leukotrienes and Essential Fatty Acids
Volume74
Issue number5
DOIs
Publication statusPublished - 2006

Keywords

  • polyunsaturated fatty-acids
  • tight junction permeability
  • body-composition
  • bone metabolism
  • absorption
  • occludin
  • binding
  • rats
  • zo-1
  • phosphorylation

Fingerprint Dive into the research topics of 'Conjugated linoleic acid enhances transepithelial calcium transport in human intestinal-like Caco-2 cells: An insight into molecular changes'. Together they form a unique fingerprint.

  • Cite this