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Neutrophil elastase inhibitor, ONO-5046, modulates acid-induced lung and systemic injury in rabbits.
Anesthesiology. 1997 Sep; 87(3):635-41.A

Abstract

BACKGROUND

Acid instillation leads to direct lung and to secondary systemic organ injury, probably via activated macrophages and neutrophils. This study investigated the effects of neutrophil elastase on organ injury after unilateral lung acid instillation by administrating a specific neutrophil elastase inhibitor, ONO-5046, before acid instillation.

METHODS

Three groups of anesthetized rabbits (n = 12 in each group) underwent tracheostomies, and instillations were made into their right lower lobe airspaces with either phosphate buffered saline (pH, 7.4; volume, 1.2 ml/kg; n = 12) or HCl (pH, 1.25; volume, 1.2 ml/kg; n = 24). In half of the acid-instilled rabbits, ONO-5046, 10 mg/kg, was given intravenously 15 min before the HCl instillation, and then 10 mg x kg(-1) x h(-1) of the drug was continuously infused throughout the experiment. The other groups of animals received the vehicle intravenously. Anesthesia and mechanical ventilation was continued for 8 h, whereas arterial blood gases were sampled intermittently. Eight hours after saline or acid instillation, the animals were killed, and their lungs, heart, kidneys, liver, and small intestines were harvested. Wet-to-dry weight ratios (W/ D) and myeloperoxidase (MPO) assays of these organs were done, and elastase assays on the bronchoalveolar lavage fluids (BALF) obtained from each lung also were performed.

RESULTS

Pretreatment with ONO-5046 attenuated the physiologic changes seen in the vehicle-treated animals. Significant decreases in W/D of the noninstilled lungs and of the small intestine and normalization of the oxygenation of the experimental animals occurred. The ONO-5046 pretreatment did not affect the neutrophil sequestration in the lungs or in the other organs as determined by neutrophil counts in BALF and by the MPO assays.

CONCLUSIONS

A neutrophil elastase inhibitor, ONO-5046, administered immediately before acid instillation attenuated the physiologic changes seen in the vehicle-treated animals. The drug blocked neutrophil elastase but did not block neutrophil sequestration in the lungs, although the drug improved measurements of lung injury.

Authors+Show Affiliations

Yokohama City University School of Medicine, Yokohama, Japan.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

9316970

Citation

Kaneko, K, et al. "Neutrophil Elastase Inhibitor, ONO-5046, Modulates Acid-induced Lung and Systemic Injury in Rabbits." Anesthesiology, vol. 87, no. 3, 1997, pp. 635-41.
Kaneko K, Kudoh I, Hattori S, et al. Neutrophil elastase inhibitor, ONO-5046, modulates acid-induced lung and systemic injury in rabbits. Anesthesiology. 1997;87(3):635-41.
Kaneko, K., Kudoh, I., Hattori, S., Yamada, H., Ohara, M., Wiener-Kronish, J., & Okumura, F. (1997). Neutrophil elastase inhibitor, ONO-5046, modulates acid-induced lung and systemic injury in rabbits. Anesthesiology, 87(3), 635-41.
Kaneko K, et al. Neutrophil Elastase Inhibitor, ONO-5046, Modulates Acid-induced Lung and Systemic Injury in Rabbits. Anesthesiology. 1997;87(3):635-41. PubMed PMID: 9316970.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Neutrophil elastase inhibitor, ONO-5046, modulates acid-induced lung and systemic injury in rabbits. AU - Kaneko,K, AU - Kudoh,I, AU - Hattori,S, AU - Yamada,H, AU - Ohara,M, AU - Wiener-Kronish,J, AU - Okumura,F, PY - 1997/10/8/pubmed PY - 1997/10/8/medline PY - 1997/10/8/entrez SP - 635 EP - 41 JF - Anesthesiology JO - Anesthesiology VL - 87 IS - 3 N2 - BACKGROUND: Acid instillation leads to direct lung and to secondary systemic organ injury, probably via activated macrophages and neutrophils. This study investigated the effects of neutrophil elastase on organ injury after unilateral lung acid instillation by administrating a specific neutrophil elastase inhibitor, ONO-5046, before acid instillation. METHODS: Three groups of anesthetized rabbits (n = 12 in each group) underwent tracheostomies, and instillations were made into their right lower lobe airspaces with either phosphate buffered saline (pH, 7.4; volume, 1.2 ml/kg; n = 12) or HCl (pH, 1.25; volume, 1.2 ml/kg; n = 24). In half of the acid-instilled rabbits, ONO-5046, 10 mg/kg, was given intravenously 15 min before the HCl instillation, and then 10 mg x kg(-1) x h(-1) of the drug was continuously infused throughout the experiment. The other groups of animals received the vehicle intravenously. Anesthesia and mechanical ventilation was continued for 8 h, whereas arterial blood gases were sampled intermittently. Eight hours after saline or acid instillation, the animals were killed, and their lungs, heart, kidneys, liver, and small intestines were harvested. Wet-to-dry weight ratios (W/ D) and myeloperoxidase (MPO) assays of these organs were done, and elastase assays on the bronchoalveolar lavage fluids (BALF) obtained from each lung also were performed. RESULTS: Pretreatment with ONO-5046 attenuated the physiologic changes seen in the vehicle-treated animals. Significant decreases in W/D of the noninstilled lungs and of the small intestine and normalization of the oxygenation of the experimental animals occurred. The ONO-5046 pretreatment did not affect the neutrophil sequestration in the lungs or in the other organs as determined by neutrophil counts in BALF and by the MPO assays. CONCLUSIONS: A neutrophil elastase inhibitor, ONO-5046, administered immediately before acid instillation attenuated the physiologic changes seen in the vehicle-treated animals. The drug blocked neutrophil elastase but did not block neutrophil sequestration in the lungs, although the drug improved measurements of lung injury. SN - 0003-3022 UR - https://www.unboundmedicine.com/medline/citation/9316970/Neutrophil_elastase_inhibitor_ONO_5046_modulates_acid_induced_lung_and_systemic_injury_in_rabbits_ L2 - https://pubs.asahq.org/anesthesiology/article-lookup/doi/10.1097/00000542-199709000-00025 DB - PRIME DP - Unbound Medicine ER -