PXR: A stepping stone from environmental chemical to cancer?

ScienceDaily (July 11, 2011) — Several chemicals that can accumulate to high levels in our body (for example BPA and some pesticides) have been recently linked to an increased risk of cancer and/or impaired responsiveness to anticancer drugs. A team of researchers, led by Sridhar Mani, at Albert Einstein College of Medicine, New York, has … Continue reading “PXR: A stepping stone from environmental chemical to cancer?”

ScienceDaily (July 11, 2011) — Several chemicals that can accumulate to high levels in our body (for example BPA and some pesticides) have been recently linked to an increased risk of cancer and/or impaired responsiveness to anticancer drugs. A team of researchers, led by Sridhar Mani, at Albert Einstein College of Medicine, New York, has now identified a potential mechanistic link between environmental exposure to these foreign chemicals (xenogens) and cancer drug therapy response and survival.

PXR is one protein by which cells (including tumor cells) can sense xenogens. In their study, Mani and colleagues determined that activation of PXR was sufficient to enhance the cancerous characteristics of human colon tumor cell lines and primary human colon cancer tissue xenografted into immune system-deficient mice. Further analysis indicated FXR activation leads to colon cancer growth through the induction of the growth factor FGF19.

The authors therefore suggest that it will be important to investigate further the extent to which the environment might play a role in tumor recurrence through PXR activation.


Story Source:

The above story is reprinted (with editorial adaptations by ScienceDaily staff) from materials provided by Journal of Clinical Investigation, via EurekAlert!, a service of AAAS.


Journal Reference:

  1. Hongwei Wang, Madhukumar Venkatesh, Hao Li, Regina Goetz, Subhajit Mukherjee, Arunima Biswas, Liang Zhu, Andreas Kaubisch, Lei Wang, James Pullman, Kathleen Whitney, Makoto Kuro-o, Andres I. Roig, Jerry W. Shay, Moosa Mohammadi, Sridhar Mani. Pregnane X receptor activation induces FGF19-dependent tumor aggressiveness in humans and mice. Journal of Clinical Investigation, 2011; DOI: 10.1172/JCI41514

Note: If no author is given, the source is cited instead.

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Author: Joe Lovrek

Born in Houston, Raised in Trinity Texas

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