• Register
X
Forgot Password

If you have forgotten your password you can enter your email here and get a temporary password sent to your email.

X

Leaving Community

Are you sure you want to leave this community? Leaving the community will revoke any permissions you have been granted in this community.

No
Yes

Vascular tumors in livers with targeted inactivation of the von Hippel-Lindau tumor suppressor.

von Hippel-Lindau (VHL) disease is a pleomorphic familial tumor syndrome that is characterized by the development of highly vascularized tumors. Homozygous disruption of the VHL gene in mice results in embryonic lethality. To investigate VHL function in the adult we have generated a conditional VHL null allele (2-lox allele) and null allele (1-lox allele) by Cre-mediated recombination in embryonic stem cells. We show here that mice heterozygous for the 1-lox allele develop cavernous hemangiomas of the liver, a rare manifestation of the human disease. Histologically these tumors were associated with hepatocellular steatosis and focal proliferations of small vessels. To study the cellular origin of these lesions we inactivated VHL tissue-specifically in hepatocytes. Deletion of VHL in the liver resulted in severe steatosis, many blood-filled vascular cavities, and foci of increased vascularization within the hepatic parenchyma. These histopathological changes were similar to those seen in livers from mice heterozygous for the 1-lox allele. Hypoxia-inducible mRNAs encoding vascular endothelial growth factor, glucose transporter 1, and erythropoietin were up-regulated. We thus provide evidence that targeted inactivation of mouse VHL can model clinical features of the human disease and underline the importance of the VHL gene product in the regulation of hypoxia-responsive genes in vivo.

Pubmed ID: 11171994

Authors

  • Haase VH
  • Glickman JN
  • Socolovsky M
  • Jaenisch R

Journal

Proceedings of the National Academy of Sciences of the United States of America

Publication Data

February 13, 2001

Associated Grants

  • Agency: NCI NIH HHS, Id: 5-R35-CA44339
  • Agency: NIDDK NIH HHS, Id: K08 DK002668
  • Agency: NIDDK NIH HHS, Id: K08 DK002668-05
  • Agency: NIDDK NIH HHS, Id: K08-DK02668

Mesh Terms

  • Albumins
  • Alleles
  • Animals
  • Erythropoietin
  • Genes, Tumor Suppressor
  • Hemangioma
  • Heterozygote
  • Ligases
  • Liver Neoplasms
  • Mice
  • Mice, Inbred BALB C
  • Mice, Knockout
  • Mice, Mutant Strains
  • Phenotype
  • Polycythemia
  • Proteins
  • Tumor Suppressor Proteins
  • Ubiquitin-Protein Ligases
  • Vascular Neoplasms
  • Von Hippel-Lindau Tumor Suppressor Protein