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ShareScienceDaily (Feb. 8, 2010) — Individuals with a condition known as Chuvash polycythemia, which is caused by a specific mutation in the protein VHL, have a greater proportion of their blood volume occupied by red blood cells than do healthy individuals. They also have pulmonary hypertension (i.e., increased blood pressure in the blood vessels that go to and from the lung) and increased respiratory rates, although the mechanistic basis for these symptoms has not been determined.
Now, Celeste Simon and colleagues, at the University of Pennsylvania School of Medicine, Philadelphia, have identified a role for the protein HIF-2-alpha in the lung complications of Chuvash polycythemia by studying mice that model the condition.
Of particular interest, HIF-2-alpha activity was found to be increased in lungs from mice that model Chuvash polycythemia.
Further, as loss of one copy of the gene responsible for generating HIF-2-alpha in mice that model Chuvash polycythemia suppressed both the polycythemia and pulmonary hypertension, the authors suggest that inhibiting HIF-2-alpha might provide a new approach to treat Chuvash disease.
The research appears in the Journal of Clinical Investigation.
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The above story is reprinted from materials provided by Journal of Clinical Investigation, via EurekAlert!, a service of AAAS.
Note: Materials may be edited for content and length. For further information, please contact the source cited above.
Journal Reference:
- Michele M. Hickey, Theresa Richardson, Tao Wang, Matias Mosqueira, Evguenia Arguiri, Hongwei Yu, Qian-Chun Yu, Charalambos C. Solomides, Edward E. Morrisey, Tejvir S. Khurana, Melpo Christofidou-Solomidou and M. Celeste Simon. The von Hippel-Lindau Chuvash mutation promotes pulmonary hypertension and fibrosis in mice. Journal of Clinical Investigation, 2010; DOI: 10.1172/JCI36362
Note: If no author is given, the source is cited instead.
Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.
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