Molecular Identification of Albumin and Hsp70 as Cytosolic Anandamide-Binding Proteins

Sergio Oddi, Filomena Fezza, Nicoletta Pasquariello, Antonella D'Agostino, Giuseppina Catanzaro, Chiara De Simone, Cinzia Rapino, Alessandro Finazzi-Agrò, Mauro Maccarrone

Research output: Contribution to journalArticlepeer-review


The cellular uptake and the intracellular synthesis/degradation of anandamide are crucial steps for controlling its extracellular level and the duration of its activity. Although the biosynthesis and breakdown of anandamide are well understood, little is known about the mechanisms underlying its intracellular transport. Here, we investigated the presence of a potential carrier-mediated trafficking of anandamide within the cytosol, using a biotinylated analog as a tool to catch by affinity chromatography anandamide-interacting proteins. The identity of two of these anandamide-binding proteins, Hsp70 and serum albumin, was determined by mass spectrometry, confirmed by western blotting and confocal microscopy, and further validated through an anandamide-binding assay. These findings suggest that the trafficking of anandamide from the plasma membrane to the internal compartments of a cell occur via a nonvesicular mechanism mediated by cytosolic carriers.

Original languageEnglish
Pages (from-to)624-632
Number of pages9
JournalChemistry and Biology
Issue number6
Publication statusPublished - Jun 26 2009



ASJC Scopus subject areas

  • Biochemistry
  • Drug Discovery
  • Molecular Biology
  • Clinical Biochemistry
  • Molecular Medicine
  • Pharmacology


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