Mucosal IgA increase in rats by continuous CLA feeding during suckling and early infancy

Francisco J. Pérez-Cano, Carolina Ramírez-Santana, Marta Molero-Luís, Margarida Castell, Montserrat Rivero, Cristina Castellote, Àngels Franch

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

The aim of this work was to establish the effect of the cis9,trans11 conjugated linoleic acid (CLA) isomer on mucosal immunity during early life in rats, a period when mucosal immunoglobulin production is poorly developed, as is also the case in humans. CLA supplementation was performed during three life periods: gestation, suckling, and early infancy. The immune status of supplemented animals was evaluated at two time points: at the end of the suckling period (21-day-old rats) and 1 week after weaning (28-day-old rats). Secretory IgA was quantified in intestinal washes from 28-day-old rats by ELISA technique. IgA, TGFβ, and PPARγ mRNA expression was measured in small intestine and colon by real time PCR, using Taqman® specific probes and primers. IgA mucosal production was enhanced in animals supplemented with CLA during suckling and early infancy: in 28-day-old rats, IgA mRNA expression was increased in small intestine and colon by approximately 6- and 4-fold, respectively, and intestinal IgA protein by ∼2-fold. TGFb gene expression was independent of age and type of tissue considered, and was not modified by dietary CLA. Gene expression of PPARδ, a possible mediator of CLA's effects was also upregulated in animals receiving CLA during early life. In conclusion, dietary supplementation with CLA during suckling and extended to early infancy enhances development of the intestinal immune response in rats.

Original languageEnglish (US)
Pages (from-to)467-476
Number of pages10
JournalJournal of Lipid Research
Volume50
Issue number3
DOIs
StatePublished - Apr 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Endocrinology
  • Cell Biology

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