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Al-Khami AA, Ghonim MA, Del Valle L, Ibba SV, Zheng L, Pyakurel K, Okpechi SC, Garay J, Wyczechowska D, Sanchez-Pino MD, Rodriguez PC, Boulares AH, Ochoa AC. Fuelling the mechanisms of asthma: Increased fatty acid oxidation in inflammatory immune cells may represent a novel therapeutic target. Clin Exp Allergy 2017; 47:1170-1184. [PMID: 28456994 DOI: 10.1111/cea.12947] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 04/04/2017] [Accepted: 04/07/2017] [Indexed: 12/17/2022]
Abstract
BACKGROUND Increasing evidence has shown the close link between energy metabolism and the differentiation, function, and longevity of immune cells. Chronic inflammatory conditions such as parasitic infections and cancer trigger a metabolic reprogramming from the preferential use of glucose to the up-regulation of fatty acid oxidation (FAO) in myeloid cells, including macrophages and granulocytic and monocytic myeloid-derived suppressor cells. Asthma is a chronic inflammatory condition where macrophages, eosinophils, and polymorphonuclear cells play an important role in its pathophysiology. OBJECTIVE We tested whether FAO might play a role in the development of asthma-like traits and whether the inhibition of this metabolic pathway could represent a novel therapeutic approach. METHODS OVA- and house dust mite (HDM)-induced murine asthma models were used in this study. RESULTS Key FAO enzymes were significantly increased in the bronchial epithelium and inflammatory immune cells infiltrating the respiratory epithelium of mice exposed to OVA or HDM. Pharmacologic inhibition of FAO significantly decreased allergen-induced airway hyperresponsiveness, decreased the number of inflammatory cells, and reduced the production of cytokines and chemokines associated with asthma. CONCLUSIONS AND CLINICAL RELEVANCE These novel observations suggest that allergic airway inflammation increases FAO in inflammatory cells to support the production of cytokines, chemokines, and other factors important in the development of asthma. Inhibition of FAO by re-purposing existing drugs approved for the treatment of heart disease may provide a novel therapeutic approach for the treatment of asthma.
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Affiliation(s)
- A A Al-Khami
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, USA.,Department of Genetics, Louisiana State University Health Sciences Center, New Orleans, LA, USA.,Faculty of Science, Tanta University, Tanta, Egypt
| | - M A Ghonim
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, USA.,Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt
| | - L Del Valle
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, USA.,Department of Pathology, Louisiana State University Health Sciences Center, New Orleans, LA, USA
| | - S V Ibba
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, USA
| | - L Zheng
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, USA
| | - K Pyakurel
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, USA
| | - S C Okpechi
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, USA
| | - J Garay
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, USA
| | - D Wyczechowska
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, USA
| | - M D Sanchez-Pino
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, USA
| | - P C Rodriguez
- University of Augusta Cancer Center, Augusta, GA, USA
| | - A H Boulares
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, USA
| | - A C Ochoa
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, USA.,Department of Pediatrics, Louisiana State University Health Sciences Center, New Orleans, LA, USA
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