Spasmolytic effects of prostaglandin E1 on serotonin-induced bronchoconstriction and pulmonary hypertension in dogs.

Abstract:

:In this study, we simultaneously evaluated the spasmolytic effects of prostaglandin E1 (PGE1) on serotonin-induced bronchoconstriction and pulmonary hypertension. Eleven mongrel dogs (8-12 kg) anaesthetized with pentobarbital were assigned to two groups: saline (n = 4) and PGE1 (n = 7). Bronchoconstriction and pulmonary hypertension were elicited with serotonin 10 micrograms kg-1 + 1 mg kg-1 h-1 and assessed as the percentage change in bronchial cross-sectional area (BCA) measured by bronchoscopy and pulmonary vascular resistance (PVR), respectively. Thirty minutes after starting the serotonin infusion, saline or PGE1 0 (saline), 0.01, 0.1, 1.0 or 10 micrograms kg-1 i.v. was given. %BCA and %PVR (basal = 100%) were assessed before and 30 min after serotonin, and 30 and 60 min after saline (saline group) or 5 min after each dose of PGE1 (PGE1 group). In the saline group, pulmonary hypertension and bronchoconstriction were stable. In the PGE1 group, PGE1 at > or = 0.1 microgram kg-1 significantly decreased %BCA and 10 micrograms kg-1 almost fully reversed the constriction (from mean (SEM) 56.2% (4.9%) to 94.4% (3.7%)). %PVR was significantly decreased at 10 micrograms kg-1 (from 230% (24%) to 176% (11%)) only. We suggest that PGE1 may produce bronchodilation rather than pulmonary vasodilation.

journal_name

Br J Anaesth

authors

Hashimoto Y,Hirota K,Yoshioka H,Hashiba E,Kudo T,Ishihara H,Matsuki A

doi

10.1093/bja/85.3.460

subject

Has Abstract

pub_date

2000-09-01 00:00:00

pages

460-2

issue

3

eissn

0007-0912

issn

1471-6771

pii

S0007-0912(17)37671-7

journal_volume

85

pub_type

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