Abstract | PURPOSE: METHODS: Forty-five rabbits sensitized to horse serum were randomly allocated to five groups: Group 1 (n = 10) received 0.5 nmol x kg(-1) of ET-1; Group 2 (n = 10) received 0.5 nmol x kg(-1) of ET-1 and 200 nmol x kg(-1) of a selective ETA receptor antagonist, BQ 610, without anaphylaxis; Group 3 (n = 5) received 200nmol x kg(-1) of BQ 610 alone without anaphylaxis, Group 4 (n = 10) received normal saline alone before being antigen challenged to induce anaphylaxis; Group 5 (n = 10) received 200 nmol x kg(-1) of BQ 610 before antigen challenge. RESULTS: Mean arterial pressure (MAP) values were significantly different between Groups 1 and 2. Heart rate (HR), central venous pressure (CVP), dynamic pulmonary compliance (C(dyn)), and pulmonary airway resistance (R(L)) did not differ significantly between Groups 1 and 2. MAP values were significantly decreased compared with baseline in both Groups 4 and 5; however, the values were not significantly different between two groups. CVP values were significantly different between Groups 4 and 5 only at the 15-min time point following antigen challenge. HR, R(L), and C(dyn) values were not significantly different between Groups 4 and 5, nor were the survival rates. CONCLUSION:
BQ 610 does not improve hypotension or survival rates in systemic aggregated anaphylactic rabbits in vivo, implying that circulating ET-1 may not play an important role in anaphylaxis, although direct proof of production of circulating ET-1 or activation of ETA receptors is lacking in this study.
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Authors | Takayuki Kawakami, Hiromasa Mitsuhata, Jin Saitoh, Haruhiko Takeuchi, Naoki Hasome, Masahiro Hiruta, Yukari Horikawa, Norimasa Seo |
Journal | Journal of anesthesia
(J Anesth)
Vol. 17
Issue 1
Pg. 22-9
( 2003)
ISSN: 0913-8668 [Print] Japan |
PMID | 12908684
(Publication Type: Journal Article)
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Chemical References |
- Endothelin-1
- Oligopeptides
- BQ 610
- Sodium Chloride
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Topics |
- Anaphylaxis
(physiopathology)
- Animals
- Bronchial Spasm
(drug therapy, physiopathology)
- Endothelin-1
(drug effects)
- Female
- Hemodynamics
(drug effects)
- Hypotension
(drug therapy, physiopathology)
- Male
- Oligopeptides
(pharmacology)
- Rabbits
- Sodium Chloride
(administration & dosage)
- Time Factors
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