Evidence of increased flux to n-6 docosapentaenoic acid in phospholipids of pancreas from cftr-/- knockout mice

Mario Ollero, Michael Laposata, Munir M. Zaman, Paola G. Blanco, Charlotte Andersson, John Zeind, Yana Urman, Geraldine Kent, Juan G. Alvarez, Steven D. Freedman

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Abstract

An association has been reported between alterations in fatty acid metabolism and cystic fibrosis (CF). We hypothesized that these alterations are specific for a particular lipid component(s) and are the result of a specific metabolic defect. The different lipid classes were examined for fatty acid changes by using pancreatic homogenates and primary cultures of pancreatic acini from cftr-/- (CF) and wild-type mice. Lipid classes and phospholipids were separated by aminopropyl column chromatography and high-performance liquid chromatography, and fatty acid methyl esters were analyzed. The results indicate that in CF mice (1) linoleate was decreased in phospholipids but not in neutral lipids; (2) there was an increase in dihomo-γ-linolenate and in docosapentaenoate, the terminal fatty acid of the n-6 pathway, in total lipids and total phospholipids, but not in the neutral lipid class; and (3) the docosapentaenoate (n-6)/docosahexaenoate (n-3) ratio was significantly elevated in neutral phospholipids. This suggests an enhanced flux through the n-6 pathway beyond arachidonate. This study provides a more in-depth understanding of the fatty acid alterations found in CF, as reflected by the cftr-/- mouse model.

Original languageEnglish (US)
Pages (from-to)1192-1200
Number of pages9
JournalMetabolism: Clinical and Experimental
Volume55
Issue number9
DOIs
StatePublished - Sep 1 2006

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ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Endocrinology

Cite this

Ollero, M., Laposata, M., Zaman, M. M., Blanco, P. G., Andersson, C., Zeind, J., Urman, Y., Kent, G., Alvarez, J. G., & Freedman, S. D. (2006). Evidence of increased flux to n-6 docosapentaenoic acid in phospholipids of pancreas from cftr-/- knockout mice. Metabolism: Clinical and Experimental, 55(9), 1192-1200. https://doi.org/10.1016/j.metabol.2006.05.002