Acylphosphatase expression during macrophage differentiation and activation of U-937 cell line.
The two acylphosphatase isoenzymes (muscle type and common type) are differently involved in cell differentiation processes. In this paper we investigate the expression of the two isoenzymes during macrophage differentiation and activation. The U-937 human promonocytic cell line is a model for cell differentiation induced by the tumor promoter phorbol myristic acetate (PMA). Here we show that only the expression of the muscle type acylphosphatase increases during U-937 differentiation and macrophage activation, confirming that the two isoenzymes are differently regulated. Moreover, we determined, in the same conditions, the level of specific mRNA. Results show that after an initial two-fold decrease during PMA stimulation, the muscle type acylphosphatase mRNA levels remain constant also after the treatment with lipopolysaccharide and gamma-interferon, treatments that lead to macrophage activation. It is possible that post-transcription regulation is responsible for the regulation of muscle type acylphosphatase in the cell during differentiation and macrophage activation.
Degl'Innocenti
D
D
Dipartimento di Scienze Biochimiche, Università di Firenze, Viale Morgagni 50, 50134 Florence, Italy.
Marzocchini
R
R
Rosati
F
F
Cellini
E
E
Raugei
G
G
Ramponi
G
G
D017766:Acid Anhydride Hydrolases / Q000235:genetics / Q000378:metabolism*; D001483:Base Sequence; D002454:Cell Differentiation / Q000187:drug effects; D017931:DNA Primers / Q000235:genetics; D015870:Gene Expression; D006801:Humans; D007527:Isoenzymes / Q000235:genetics / Q000378:metabolism; D008262:Macrophage Activation / Q000502:physiology; D008264:Macrophages / Q000166:cytology / Q000187:drug effects / Q000201:enzymology*; D009569:Nitric Oxide / Q000096:biosynthesis; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D020298:U937 Cells; D000097024:Acylphosphatase
D017766:Acid Anhydride Hydrolases; D017931:DNA Primers; D007527:Isoenzymes; D009569:Nitric Oxide; D012333:RNA, Messenger; D013755:Tetradecanoylphorbol Acetate; D000097024:Acylphosphatase