Telomerase Activity and Estrogen Receptors in Breast Cancer
Author Information
Author(s): Murillo-Ortiz Blanca, Astudillo-De la Vega Horacio, Castillo-Medina Sebastian, Malacara JM, Benitez-Bribiesca Luis
Primary Institution: Unidad de Investigacion Clinica, UMAE no. 1 Bajio, IMSS, Leon Guanajuato, Mexico
Hypothesis
This study investigates the association between telomerase activity, estrogen receptor expression, and treatment response in breast cancer.
Conclusion
Lower telomerase activity is associated with the absence of estrogen receptor beta in breast tumors.
Supporting Evidence
- Telomerase activity was detected in 59% of the breast tumors examined.
- ERα was expressed in 88% of cases, while ERβ was expressed in only 36%.
- Bcl-2 was expressed in 79.5% of invasive breast carcinomas.
- A significant correlation was found between low levels of telomerase activity and a lack of ERβ expression.
Takeaway
The study found that tumors without estrogen receptor beta had lower levels of telomerase activity, which might help understand how hormones affect breast cancer.
Methodology
Tissue samples from 44 breast cancer patients were analyzed for telomerase activity and expression of estrogen receptors and Bcl-2 using immunocytochemical techniques.
Limitations
The study did not quantify the ratio of malignant cells to benign elements in the tissue samples.
Participant Demographics
Median age of participants was 52 years, with a range from 27 to 77 years.
Statistical Information
P-Value
p = 0.03 for telomerase activity and differentiation grade; p = 0.007 for ERα and ERβ expression.
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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