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3',5'-cyclic nucleotide phosphodiesterase 11A: localization in human tissues

K Loughney1, J Taylor, V A Florio

  • 1Icos Corporation, Bothell, WA, USA. kloughney@icos.com

International Journal of Impotence Research
|April 1, 2005
PubMed

Insights

The study found that only one variant, PDE11A4, of the 3

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pharmacology

Background:

  • 3',5'-Cyclic nucleotide phosphodiesterase 11 (PDE11) is a recently identified PDE family with one gene, PDE11A, and four splice variants.
  • The physiological function of PDE11A remains largely unknown.
  • Tadalafil, a PDE5A inhibitor, shows partial inhibition of PDE11, suggesting potential interactions.

Purpose of the Study:

  • To investigate the tissue expression pattern of PDE11A protein in humans.
  • To determine which PDE11A splice variants are expressed at the protein level.

Main Methods:

  • Analysis of PDE11A mRNA transcripts.
  • Detection of PDE11A protein using immunohistochemistry in various human tissues.
  • Antibody staining to identify PDE11A protein localization.

Main Results:

  • Only the PDE11A4 splice variant protein was detected in human prostate, pituitary, heart, and liver.
  • Strong PDE11A4 staining was observed in prostate glandular epithelium and weak staining in cardiac parasympathetic ganglia.
  • No PDE11A protein was detected in human blood vessels, cardiac myocytes, skeletal muscle, testis, or penis.

Conclusions:

  • PDE11A4 is the predominant or sole expressed protein variant of PDE11A in key human tissues.
  • The tissue-specific expression of PDE11A4 suggests a targeted physiological role.
  • Further research is needed to elucidate the specific functions of PDE11A4 in the prostate, pituitary, heart, and liver.

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