IISER Bhopal Researchers Uncover Critical Mechanism Behind Breast Cancer Metastasis Under Low Oxygen Conditions
A groundbreaking study from the Indian Institute of Science Education and Research (IISER) Bhopal has revealed how breast cancer cells become significantly more invasive when oxygen levels drop, a common condition in tumors known as hypoxia. The research, conducted by a team led by Professor Sanjeev Shukla from the Department of Biological Sciences, provides crucial insights into cancer progression and potential therapeutic strategies.
The PRMT5 Protein: A Key Player in Cancer Invasion
The study identifies a protein called PRMT5 as central to this invasive process. Under hypoxic conditions, another protein named CTCF binds to the PRMT5 gene, effectively switching it on and increasing PRMT5 production. This activation triggers a cascade of molecular events that fundamentally alter cancer cell behavior.
"When oxygen availability decreases, CTCF attaches to the PRMT5 gene and activates it like a biological switch," explained Professor Shukla. "This elevated PRMT5 production then modifies how DNA is packaged within cells, initiating a chain reaction that affects a gene called TCF3."
Epithelial-to-Mesenchymal Transition: The Transformation Process
This molecular cascade drives what scientists call epithelial-to-mesenchymal transition (EMT), a critical process in cancer metastasis. EMT transforms stationary, adhesive cancer cells into mobile, invasive cells capable of breaking away from the primary tumor and spreading throughout the body.
"Our findings explain how tumors not only survive but actively thrive in challenging, low-oxygen environments within the body," Professor Shukla emphasized. "PRMT5 emerges from this research as a highly promising molecular target for therapeutic intervention."
Experimental Validation with PRMT5 Inhibitor
The research team validated their discovery by testing a drug called GSK591, which specifically inhibits PRMT5 activity. When treated with this inhibitor, breast cancer cells showed dramatically reduced invasive capabilities and were significantly less able to spread.
"While substantial work remains before these findings can translate into clinical therapies, this breakthrough lays essential groundwork for future cancer treatments," Professor Shukla noted. "Understanding this mechanism provides a clear pathway for developing drugs that could prevent metastasis in breast cancer patients."
Publication and Implications
The study has been published in the prestigious international journal PLOS Biology, highlighting its significance in the global scientific community. The research contributes to growing understanding of tumor microenvironment dynamics and offers hope for more effective breast cancer treatments targeting the metastatic process.
This discovery from IISER Bhopal represents an important advancement in cancer biology, potentially opening new avenues for combating one of the most challenging aspects of breast cancer progression.
