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Chlamydia Infection May Pave Way For Cancer Via DNA Damage

Chlamydia infections can cause DNA damage that may increase the risk of later developing cancer, a new study suggests.


In the study, human cells growing in lab dishes that were infected with chlamydia were more likely to have DNA damage compared to cells not infected with chlamydia. What's more, this DNA damage was not always repaired properly by the cell, increasing the chances of genetic mutations.


Normally, cells with such DNA damage would activate a process that kills the cells, so that the cell does not turn cancerous. But in the study, the cells with DNA damage overrode this mechanism, and continued to divide. The continued division of cells with DNA mutations could eventually lead to cancer, the researchers said.


Earlier studies found an association between chlamydia infections and an increased risk of cervical and ovarian cancer in people, but such studies cannot prove cause and effect. The new study provides a biological explanation for how chlamydia could increase the risk of cancer.


However, because the study was conducted in cells in a lab dish, more research is needed to show the same thing occurs in people.


The new study, conducted by researchers at the Max Planck Institute for Infection Biology in Berlin, was published June 12 in the journal Cell Host & Microbe.


Chlamydia is a sexually transmitted disease caused by the bacteria Chlamydia trachomatis. Most infected people have no symptoms, according to the Centers for Disease Control and Prevention. However, untreated infections can damage the reproductive tract in women, and cause infertility. Complications from untreated infections are rare in men, but the condition can cause a burning sensation when urinating, and very rarely, prevent a man from fathering children, the CDC says.


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