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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Caveolin-1 is not essential for biosynthetic apical membrane transport.

Caveolin-1 has been implicated in apical transport of glycosylphosphatidylinositol (GPI)-anchored proteins and influenza virus hemagglutinin (HA). Here we have studied the role of caveolin-1 in apical membrane transport by generating caveolin-1-deficient Madin-Darby canine kidney (MDCK) cells using retrovirus-mediated RNA interference. The caveolin-1 knockdown (cav1-KD) MDCK cells were devoid of caveolae. In addition, caveolin-2 was retained in the Golgi apparatus in cav1-KD MDCK cells. However, we found no significant alterations in the apical transport kinetics of GPI-anchored proteins or HA upon depletion of caveolin-1. Similar results were obtained using embryonic fibroblasts from caveolin-1-knockout mice. Thus, we conclude that caveolin-1 does not play a major role in lipid raft-mediated biosynthetic membrane trafficking.[1]


  1. Caveolin-1 is not essential for biosynthetic apical membrane transport. Manninen, A., Verkade, P., Le Lay, S., Torkko, J., Kasper, M., Füllekrug, J., Simons, K. Mol. Cell. Biol. (2005) [Pubmed]
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