Gene therapy for murine glycerol kinase deficiency: importance of murine ortholog

Biochem Biophys Res Commun. 2005 Sep 16;335(1):247-55. doi: 10.1016/j.bbrc.2005.07.066.

Abstract

A glycerol kinase (Gyk) knock-out (KO) mouse model permits improved understanding of glycerol kinase (GK) deficiency (GKD) pathogenesis, however, early death of affected mice limits its utility. The purpose of this work was to delay death of affected males to investigate thoroughly their phenotypes. An adenoviral vector carrying the human (Adeno-XGK) or mouse (Adeno-XGyk) GK gene was injected into KO mice within 24 h of birth. Adeno-XGK did not change KO mouse survival time despite liver GK activity greater than 100% of wild type. However, Adeno-XGyk improved KO mouse survival time greater than two-fold. These investigations demonstrate that gene replacement therapy for Gyk KO mice is more efficacious using murine Gyk than human GK. These studies expand our understanding of GKD pathogenesis in the murine model, and show that while murine GKD is more severe than in humans, GKD mice have similar metabolic disturbances to affected humans with hypoglycemia and acidemia.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adenoviridae / genetics
  • Animals
  • Blood Gas Analysis
  • Blood Glucose / metabolism
  • Body Weight
  • Fatty Acids, Nonesterified / blood
  • Genetic Therapy*
  • Glycerol / blood
  • Glycerol Kinase / deficiency*
  • Glycerol Kinase / genetics*
  • Glycerol Kinase / metabolism
  • Mice
  • Mice, Knockout
  • Survival Rate

Substances

  • Blood Glucose
  • Fatty Acids, Nonesterified
  • Glycerol Kinase
  • Glycerol