Preparing your results

Our searching services are busy right now. Your search will reload in five seconds.

X
Forgot Password

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

An Msh2 point mutation uncouples DNA mismatch repair and apoptosis.

Cancer research | Jan 15, 2004

http://www.ncbi.nlm.nih.gov/pubmed/14744764

Mutations in the human DNA mismatch repair gene MSH2 are associated with hereditary nonpolyposis colorectal cancer as well as a significant proportion of sporadic colorectal cancer. The inactivation of MSH2 results in the accumulation of somatic mutations in the genome of tumor cells and resistance to the genotoxic effects of a variety of chemotherapeutic agents. Here we show that the DNA repair and DNA damage-induced apoptosis functions of Msh2 can be uncoupled using mice that carry the G674A missense mutation in the conserved ATPase domain. As a consequence, although Msh2(G674A) homozygous mutant mice are highly tumor prone, the onset of tumorigenesis is delayed as compared with Msh2-null mice. In addition, tumors that carry the mutant allele remain responsive to treatment with a chemotherapeutic agent. Our results indicate that Msh2-mediated apoptosis is an important component of tumor suppression and that certain MSH2 missense mutations can cause mismatch repair deficiency while retaining the signaling functions that confer sensitivity to chemotherapeutic agents.

Pubmed ID: 14744764 RIS Download

Mesh terms: Alanine | Amino Acid Substitution | Animals | Apoptosis | Base Pair Mismatch | Chromosomes, Artificial, Bacterial | Cisplatin | Codon | DNA Damage | DNA Repair | DNA-Binding Proteins | Fibroblasts | Glycine | Mice | MutS Homolog 2 Protein | Point Mutation | Proto-Oncogene Proteins | Sequence Deletion

Research resources used in this publication

None found

Research tools detected in this publication

None found

Data used in this publication

None found

Associated grants

  • Agency: NCI NIH HHS, Id: CA13330
  • Agency: NCI NIH HHS, Id: CA76329
  • Agency: NCI NIH HHS, Id: CA84301
  • Agency: NCI NIH HHS, Id: CA93484
  • Agency: NCI NIH HHS, Id: CN05117
  • Agency: NIEHS NIH HHS, Id: ES11040

Mouse Genome Informatics (Data, Gene Annotation)

Publication data is provided by the National Library of Medicine ® and PubMed ®. Data is retrieved from PubMed ® on a weekly schedule. For terms and conditions see the National Library of Medicine Terms and Conditions.