Can protein 14-3-3 sigma prevent or kill breast cancer tumors?

breast cancer
Micrograph showing a lymph node invaded by ductal breast carcinoma, with extension of the tumour beyond the lymph node. Credit: Nephron/Wikipedia

Every parent knows the maxim "feed a cold, starve a fever." In cancer, however, exactly how to feed or starve a tumor has not been easy to determine.

A study led by scientists at The University of Texas MD Anderson Cancer Center has shown that a simple molecule called 14-3-3 sigma could be one answer for explaining , the chemical process by which a tumor forms, grows or dies.

"We know that all cancers grow by learning how to reprogram their metabolism," said Mong-Hong Lee, Ph.D., professor of Molecular and Cellular Oncology. "But exactly how this occurs has not been fully understood. Our study showed that 14-3-3 sigma opposes and reverses tumor-promoting metabolic programs."

Lee's study results, which appear in the July 16, 2015 issue of Nature Communications, revealed new understanding about how 14-3-3 sigma - a cell cycle "controller" -regulates metabolic programming, thus protecting healthy cells from turning into tumor-producing factories.

In vivo and in vitro experiments showed that, among many biochemical effects, 14-3-3 sigma suppresses cancer glycosis, which prevents cancer's ability to convert glucose into pyruvate, a substance essential for cell growth.

"14-3-3 sigma expression levels can help predict overall and recurrence-free survival rates, tumor glucose uptake, and metabolic gene expression in ," said Lee. "These results highlight that 14-3-3 sigma is an important regulator of , and loss of 14-3-3 sigma expression is critical for cancer metabolic reprogramming."

Lee believes that the study findings provide additional insight about the "crosstalk" between cancer metabolism and .

"We anticipate that pharmacologically elevating 14-3-3 sigma's function in tumors could be a promising direction for targeted anti-cancer metabolism therapy development in the future," he said.


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Journal information: Nature Communications

Citation: Can protein 14-3-3 sigma prevent or kill breast cancer tumors? (2015, July 16) retrieved 25 June 2019 from https://medicalxpress.com/news/2015-07-protein-sigma-breast-cancer.html
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Jul 16, 2015
Breast cancer is the most common malignant tumor in women. According to statistics, morbidity of breast cancer accounts for 7%--10% of all kinds of malignant tumors in the whole body.So we are pressed to find better treatments to stop all steps of cancer cells, and ensure that they are can't find a way to survive after treatment.

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