The CHEK2 I157T variant and breast cancer susceptibility: a systematic review and meta-analysis
Chuan Liu1, Ying Wang, Qing-Shui Wang
1Department of Oncology, Changhai Hospital, Shanghai, China.
Background:
The cell cycle checkpoint kinase 2 (CHEK2) gene I157T variant may be associated with an increased risk of breast cancer, but it is unclear whether the evidence is sufficient to recommend testing for the mutation in clinical practice.
Materials And Methods:
We systematically searched PubMed, Embase, Elsevier and Springer for relevant articles published before Nov 2011. Summary odds ratio (OR) and 95% confidence interval (95% CI) incidence rates were calculated using a random-effects model with STATA (version 10.0) software.
Results:
A total of fifteen case-control studies, including 19,621 cases and 27,001 controls based on the search criteria, were included for analysis. A significant association was found between carrying the CHEK2 I157T variant and increased risk of unselected breast cancer (OR = 1.48, 95% CI = 1.31-1.66, P < 0.0001), familial breast cancer (OR = 1.48, 95% CI = 1.16-1.89, P < 0.0001), and early-onset breast cancer (OR = 1.47, 95% CI = 1.29-1.66, P < 0.0001). We found an even stronger significant association between the CHEK2 I157T C variant and increased risk of lobular type breast tumors (OR = 4.17, 95% CI = 2.89-6.03, P < 0.0001).
Conclusion:
Our research indicates that the CHEK2 I157T variant may be another important genetic mutation which increases risk of breast cancer, especially the lobular type.
Related Concept Videos
Cancer-Critical Genes II: Tumor Suppressor Genes
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
Cancer-Critical Genes II: Tumor Suppressor Genes
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
Cancer Survival Analysis
mTOR Signaling and Cancer Progression
The mTOR pathway or the...
Cancer Prevention
Some...
Targeted Cancer Therapies
There are several types of targeted therapies against specific...

