Abstract:
:N-acylethanolamines (NAEs) are a class of bioactive lipid molecules in animal tissues, including the endocannabinoid anandamide and the anti-inflammatory substance N-palmitoylethanolamine. Enzymatic hydrolysis of NAEs is considered to be an important step to regulate their endogenous levels. Lysosomal NAE-hydrolysing acid amidase (NAAA) as well as fatty acid amide hydrolase (FAAH) is responsible for this reaction. Here, we report relatively high expression of NAAA in human prostate cancer cells (PC-3, DU-145 and LNCaP) and prostate epithelial cells (PrEC), with the highest mRNA level in LNCaP cells. FAAH and the NAE-forming enzyme N-acylphosphatidylethanolamine-hydrolysing phospholipase D (NAPE-PLD) were also detected in these cells. NAAA activity in LNCaP cells could be distinguished from coexisting FAAH activity, based on their different pH dependency profiles and specific inhibition of FAAH activity by URB597. These results showed that both the enzymes were functionally active. We also found that NAAA was partly secreted from LNCaP cells, which underlined possible usefulness of this enzyme as a biomarker of prostate cancer.
journal_name
J Biochemjournal_title
Journal of biochemistryauthors
Wang J,Zhao LY,Uyama T,Tsuboi K,Wu XX,Kakehi Y,Ueda Ndoi
10.1093/jb/mvn122subject
Has Abstractpub_date
2008-11-01 00:00:00pages
685-90issue
5eissn
0021-924Xissn
1756-2651pii
mvn122journal_volume
144pub_type
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