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AMP deaminase 3 deficiency enhanced 5'-AMP induction of hypometabolism

Isadora Susan Daniels1, William G O Brien, Vinay Nath

  • 1Department of Biochemistry and Molecular Biology, University of Texas Health Science Center, Houston, Texas, United States of America.

Plos One
|September 26, 2013
PubMed

Insights

Adenosine monophosphate deaminase 3 (AMPD3) deficiency in mice erythrocytes enhances 5'-AMP-induced hypometabolism. This highlights AMPD3

Area of Science:

  • Metabolic regulation
  • Physiology
  • Biochemistry

Background:

  • 5 -AMP administration induces a hypometabolic state in mice.
  • A proposed mechanism involves reduced erythrocyte oxygen transport due to 5 -AMP altering adenylate equilibrium.

Purpose of the Study:

  • To investigate the role of adenosine monophosphate deaminase 3 (AMPD3) in 5 -AMP-mediated hypometabolism.
  • To determine if AMPD3 deficiency in erythrocytes affects hypometabolic responses.

Main Methods:

  • Generated mice deficient in AMPD3 (Ampd3(-/-)) specifically in erythrocytes.
  • Measured adenylate levels (ATP, ADP, 5 -AMP) in erythrocytes.
  • Assessed hypometabolic responses to 5 -AMP administration, including arousal time.

Main Results:

  • Ampd3(-/-) mice showed elevated ATP and ADP, but not 5 -AMP, in erythrocytes.
  • Fasting blood glucose levels were comparable between Ampd3(-/-) and wild-type mice.
  • Ampd3(-/-) mice exhibited deeper hypometabolism and delayed arousal after 5 -AMP administration.

Conclusions:

  • AMPD3 plays a crucial role in regulating 5 -AMP-mediated hypometabolism.
  • Erythrocytes are implicated in the physiological response to 5 -AMP, mediated by AMPD3 activity.

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