| Title |
Promoter methylation status and expression of estrogen receptor alpha in familial breast cancer patients
|
|---|---|
| Published in |
Tumor Biology, September 2011
|
| DOI | 10.1007/s13277-011-0234-x |
| Pubmed ID | |
| Authors |
Jing Wei, Bing Han, Xiao-yun Mao, Min-jie Wei, Fan Yao, Feng Jin |
| Abstract |
The hypermethylation of estrogen receptor alpha (ERα) promoter is a common molecular alteration in sporadic breast cancer (BC), but its involvement in familial BC remains largely unknown. In the present study, we analyzed the methylation statuses of four regions (ER1, ER3, ER4, and ER5) of the ERα promoter and the ERα expression levels of 113 familial BC patients in a Han Chinese Population from northeastern China and evaluated the association between major clinicopathological features and the hypermethylation statuses of the ERα gene. Tumor samples were analyzed for ERα methylation status by the methylation-specific polymerase chain reaction for ERα, PR, p53, BRCA-1, and BRCA-2 by immunohistochemical (IHC) staining and for Her-2 status by IHC and fluorescence in situ hybridization (FISH). ERα methylation was observed in tumor tissues in 47/113 (41.6%) familial BC patients. There were no significant differences in the methylation statuses among ER1 (20.4%), ER3 (18.6%), ER4 (17.7%), and ER5 (19.5%; χ (2) = 3.89, p > 0.05). An association between ERα expression level and its promoter methylation level was found. In addition, ERα methylation was significantly correlated with tumor size, PR expression, p53 nuclear accumulation, and BRCA-1 and BRCA-2 statuses. In conclusion, in familial BC patients, the level of ERα gene promoter methylation correlates with ERα expression, PR, p53 nuclear accumulation, and BRCA-1 and BRCA-2 statuses. Epigenetic alteration of ERα gene may play an important role in the pathogenesis of familial BC. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| India | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 24 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Japan | 1 | 4% |
| Unknown | 23 | 96% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 4 | 17% |
| Researcher | 3 | 13% |
| Student > Bachelor | 3 | 13% |
| Student > Postgraduate | 3 | 13% |
| Student > Master | 3 | 13% |
| Other | 7 | 29% |
| Unknown | 1 | 4% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 8 | 33% |
| Biochemistry, Genetics and Molecular Biology | 6 | 25% |
| Agricultural and Biological Sciences | 5 | 21% |
| Nursing and Health Professions | 1 | 4% |
| Sports and Recreations | 1 | 4% |
| Other | 1 | 4% |
| Unknown | 2 | 8% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 28 September 2011.
All research outputs
#15,236,094
of 22,653,392 outputs
Outputs from Tumor Biology
#1,048
of 2,620 outputs
Outputs of similar age
#79,828
of 114,473 outputs
Outputs of similar age from Tumor Biology
#8
of 11 outputs
Altmetric has tracked 22,653,392 research outputs across all sources so far. This one is in the 22nd percentile – i.e., 22% of other outputs scored the same or lower than it.
So far Altmetric has tracked 2,620 research outputs from this source. They receive a mean Attention Score of 2.2. This one has gotten more attention than average, scoring higher than 53% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 114,473 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 18th percentile – i.e., 18% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 11 others from the same source and published within six weeks on either side of this one. This one is in the 27th percentile – i.e., 27% of its contemporaries scored the same or lower than it.