Imbalances in estrogen and testosterone levels and changes in how cells respond to these hormones may be linked to bladder cancer in women, according to a study published in the World Academy of Sciences Journal.
Researchers evaluated 122 women to examine whether hormone imbalances are associated with the development and progression of bladder cancer in women. The study included 50 patients diagnosed with bladder cancer and 72 age-matched participants without the disease.
Blood samples and tissue biopsies were used to measure hormone levels and receptor activity. Receptors are proteins in cells that bind to hormones and help trigger their effects. Testosterone acts through the androgen receptor, while estrogen acts through the estrogen receptor.
The analysis indicated that in addition to elevated estrogen and testosterone levels, androgen receptor activity was also increased, while estrogen receptor activity was reduced in patients with bladder cancer compared with individuals in the control group.
“These findings support a potential link between sex hormone imbalance and altered receptor expression in the pathophysiology of bladder cancer in women,” the researchers wrote. This suggests that some pathways involved in tumor growth may be more active, while others may be impaired.
Hormones such as estrogen and testosterone help regulate cell growth and survival, and changes in how these signals are processed may influence how tumors develop and progress. Disruptions in these pathways may contribute to an imbalance between signals that promote growth and those that help regulate it.
The study also found that higher estrogen levels were linked to more advanced tumor stages. However, these findings do not establish whether hormone imbalances play a causal role in the development or progression of the disease. The results also suggest that, despite higher estrogen levels, tumor cells may not respond to the hormone in the usual way.
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According to the authors, a better understanding of these pathways could support the development of new treatments, including therapies that target hormone signaling. The study’s limitations included a relatively small sample size and the analysis of only a limited number of biological pathways.
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