newly identified factor may determine breast cancer therapy
Last Updated : GMT 06:49:16
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Last Updated : GMT 06:49:16
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Gene cell manipulation developments aid treatment

Newly identified factor may determine breast cancer therapy

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Arab Today, arab today Newly identified factor may determine breast cancer therapy

Aggressive sub-type that isn't sensitive to oestrogen is studied
Sydney - Arabstoday

Aggressive sub-type that isn't sensitive to oestrogen is studied Australian scientists say a "transcription factor" causes breast cancer to develop an aggressive subtype that isn't sensitive to oestrogen. Chris Ormandy of Sydney's Garvan Institute of Medical Research said transcription factors were molecules that switched genes on or off. In this case, the transcription factor known as ELF5 inhibited sensitivity to oestrogen very early in the life of a breast cancer cell. In earlier research, Ormandy showed ELF5 was responsible for the development of the oestrogen-receptor-negative cells in the breast during pregnancy that produce milk. In the current study, Ormandy, Dr. Maria Kalyga and Dr. David Gallego-Ortega showed the same molecular decision occurs in breast cancer and that ELF5 had the ability to change an existing tumour to an oestrogen-insensitive type.
The team also described the genetic mechanisms by which ELF5 opposed the action of oestrogen, and showed it was possible to alter the subtype of breast cancer by manipulating ELF5 levels. "This work tells us that cancers which become refractory to anti-oestrogen treatment often do so by elevating their levels of ELF5 and becoming functionally oestrogen receptor negative," Ormandy said in a statement. "This raises the therapeutic option of manipulating ELF5 levels to treat breast cancer." The findings were published in the journal PLoS Biology.
Source: UPI

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