Related Experiment Videos
Microsatellite instability and genetic alterations in ovarian cancer
1Laboratory of Molecular Pharmacology, Institute for Pharmacological Research, Mario Negri, Milan, Italy.
Abstract:
Inactivation of the mismatch repair system (MMR) leads to the accumulation of mutations, particularly in highly repeated sequences (microsatellite). The resulting microsatellite instability can profoundly affect the cellular behaviour, since many genes playing important roles in the mechanisms of signal transduction, apoptosis, DNA repair and cell cycle control can be altered in tumors presenting microsatellite instability. Germline mutations in MMR genes are associated with hereditary non polyposis colon cancer. Microsatellite instability and the associated frameshift mutations in genes have been well described in sporadic colon, gastric and endometrium tumors. In this review we collected the data available on the impact of microsatellite instability in ovarian cancer and the possible consequences of this instability to the presence of mutations in genes containing in their coding regions repeated nucleotides and to the response of these tumors to chemotherapy.
Insights
Microsatellite instability, caused by mismatch repair deficiency, drives mutations in ovarian cancers. This impacts genes controlling cell functions and may affect chemotherapy response.
Area of Science:
- Oncology
- Genetics
- Molecular Biology
Background:
- Deficient mismatch repair (MMR) system causes microsatellite instability (MSI).
- MSI leads to mutations in genes regulating cell signaling, apoptosis, DNA repair, and cell cycle control.
- Germline MMR gene mutations are linked to hereditary nonpolyposis colorectal cancer; MSI is observed in various sporadic tumors.
Purpose of the Study:
- To review the impact of MSI in ovarian cancer.
- To explore consequences of MSI on gene mutations and chemotherapy response in ovarian tumors.
Main Methods:
- Literature review of studies on MSI in ovarian cancer.
- Analysis of data concerning MSI-associated gene mutations.
- Evaluation of MSI's effect on treatment outcomes.
Main Results:
- MSI significantly impacts gene mutations in ovarian cancer.
- Specific gene alterations due to MSI are identified.
- Evidence suggests MSI influences ovarian tumor response to chemotherapy.
Conclusions:
- MSI is a critical factor in ovarian cancer development and progression.
- Understanding MSI's role may reveal new therapeutic strategies.
- Further research is needed to fully elucidate MSI's clinical implications in ovarian cancer.