An orally active geranyl acetophenone attenuates airway remodeling in a murine model of chronic asthma.

Abstract

2,4,6-Trihydroxy-3-geranyl acetophenone (tHGA) is a synthetic compound that is naturally found in Melicope ptelefolia. We had previously demonstrated that parenteral administration of tHGA reduces pulmonary inflammation in OVA-sensitized mice. In this study, we evaluated the effect of orally administered tHGA upon airway remodeling in a murine model of chronic asthma. Female BALB/C mice were sensitized intraperitoneally with ovalbumin (OVA) on day 0, 7 and 14, followed by aerosolized 1% OVA 3 times per week for 6 weeks. Control groups were sensitized with saline. OVA sensitized animals were either treated orally with vehicle (saline with 1% DMSO and Tween 80), tHGA (80, 40, 20mg/kg) or zileuton (30mg/kg) 1h prior to each aerosolized OVA sensitization. On day 61, mice underwent methacholine challenge to determine airway hyperresponsiveness prior to collection of bronchoalveolar lavage (BAL) fluid and lung samples. BAL fluid inflammatory cell counts and cytokine concentrations were evaluated while histological analysis and extracellular matrix protein concentrations were determined on collected lung samples. Oral tHGA treatment attenuated airway hyperresponsiveness and inhibited airway remodeling in a dose-dependent fashion. tHGA's effect on airway remodeling could be attributed to the reduction of inflammatory cell infiltration and decreased expression of cytokines associated with airway remodeling. Oral administration of tHGA attenuates airway hyperresponsiveness and remodeling in OVA-induced BALB/c mice. tHGA is an interesting compound that should be evaluated further for its possible role as an alternative non-steroidal pharmacological approach in the management of asthma.

• Authors: Yu Zhao Lee, Khozirah Shaari, Manraj Singh Cheema, Chau Ling Tham, Mohd Roslan Sulaiman, Daud Ahmad Israf
• Journal: European journal of pharmacology (Eur J Pharmacol) Vol. 797 Pg. 53-64 (Feb 15 2017) ISSN: 1879-0712 [Electronic] Netherlands
• PMID: 28089919 (Publication Type: Journal Article)
• Copyright: Copyright © 2017 Elsevier B.V. All rights reserved.

Chemical References

• 2,4,6-trihydroxy-3-geranylacetophenone
• Acetophenones
• Anti-Asthmatic Agents
• Cytokines
• Immunoglobulin G
• Immunoglobulin E
• Ovalbumin
• Collagen
• Phloroglucinol

Topics

• Acetophenones (administration & dosage, pharmacology, therapeutic use)
• Administration, Oral
• Airway Remodeling (drug effects)
• Animals
• Anti-Asthmatic Agents (administration & dosage, pharmacology, therapeutic use)
• Asthma (drug therapy, genetics, immunology, pathology)
• Chronic Disease
• Collagen (metabolism)
• Cytokines (genetics)
• Disease Models, Animal
• Female
• Gene Expression Regulation (drug effects)
• Immunoglobulin E (blood, immunology)
• Immunoglobulin G (blood, immunology)
• Lung (drug effects, immunology, metabolism, pathology)
• Mice
• Mice, Inbred BALB C
• Ovalbumin (immunology)
• Phloroglucinol (administration & dosage, analogs & derivatives, pharmacology, therapeutic use)