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Updated: Oct 3, 2026

Isolation of Pulmonary Artery Smooth Muscle Cells from Neonatal Mice
Published on: October 19, 2013
[Chronic hypoxia altered the mRNA expression of cyclooxygenase in intrapulmonary artery smooth muscle cell]
1Department of Pathophysiology, Tongji Medical College, Science and Technology University of Huazhong, Wuhan 430030, China.
Objective:
To elucidate the effect of chronic hypoxia on the cyclooxygenase-2 mRNA expression in pulmonary artery smooth muscle cells of rats.
Methods:
The gene expressions of COX-1 and COX-2 during acute hypoxia were measured with semi-quantified RT-PCR in the 2nd, 4th and 6th subculture of intrapulmonary artery smooth muscle cells (PASMC) of wistar rats under normoxic and continuous hypoxic condition separately.
Results:
In all three generations, the expressions of COX-1 had no significant changes in hypoxia, while the COX-2 mRNA expression was higher in chronic hypoxic group than that in normoxic group and elevated with the duration of hypoxia exposure. After exposure to acute hypoxia, the augmentation of COX-2 mRNA expression in PASMC was higher in chronic hypoxic group than in normoxic group in all three subcultures.
Conclusion:
Chronic hypoxia could enhance the mRNA expression of cyclooxygenase-2 caused by acute hypoxia in PASMC of rats. It might be responsible for the lower HPV under chronic hypoxia.
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