Strain difference in pulmonary vascular responsiveness to hypoxia in rats

Jin Xian-rong, Fan Ming, Wang Zhi-qiang, Yunchao Su, Yang Guang-tian, Hu Han-bo, Zhang Ye-ping, Feng Chang-jian, Ding Yao-xian, Wang Di-xun

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Abstract

The difference in pulmonary vascular response to hypoxia between Hilltop Sprague-Dawley (HT) rats and Wistar (W) rats was studied. Effects of inhibitor of leukotriene (LT) synthesis or prostaglandin (PG) synthesis on hypoxic pulmonary vasoconstriction (HPV) and chronic pulmonary hypertension were observed, and variations in plasma TXB2 and 6-keto-PGF1a during hypoxia were determined. The results showed that in rats of both strains LTs are the major mediator of HPV, which is also mediated by vasoconstrictive PGs in HT rats, while modulated by vasodilative PGs in W rats. This might be the crucial mechanism responsible for the higher pulmonary vascular responsiveness in HT rats. Differences in the modulating effect of histamine and in the structural feature of pulmonary arteriole might be contributing factors as well.

Original languageEnglish (US)
Pages (from-to)134-140
Number of pages7
JournalJournal of Tongji Medical University
Volume10
Issue number3
DOIs
Publication statusPublished - Jan 1 1990
Externally publishedYes

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Keywords

  • hypoxia
  • leukotrienes
  • prostaglandins
  • pulmonary vascular rresponsiveness

ASJC Scopus subject areas

  • Management of Technology and Innovation

Cite this

Xian-rong, J., Ming, F., Zhi-qiang, W., Su, Y., Guang-tian, Y., Han-bo, H., ... Di-xun, W. (1990). Strain difference in pulmonary vascular responsiveness to hypoxia in rats. Journal of Tongji Medical University, 10(3), 134-140. https://doi.org/10.1007/BF02986450