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Asthma is a chronic inflammatory disorder of the airways characterized by variable airflow obstruction and heightened bronchial responsiveness to a wide range of triggers. The underlying inflammation leads to airway swelling, mucus hypersecretion, and smooth muscle constriction, all of which narrow the airway lumen and impede airflow. Clinically, asthma presents with recurrent episodes of wheezing, shortness of breath, chest tightness, and coughing, symptoms that typically vary in intensity and...

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Acupuncture in a Rat Model of Asthma

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Arginine and asthma.

Claudia R Morris¹

¹Division of Emergency Medicine, Department of Pediatrics, Emory-Children's Center for Developmental Lung Biology, Emory University School of Medicine, Atlanta, GA, USA.

Nestle Nutrition Institute Workshop Series

|October 11, 2013

Summary

This summary is machine-generated.

Altered arginine metabolism and nitric oxide (NO) imbalance contribute to asthma development. Targeting these pathways, including arginase activity and L-arginine availability, may offer new asthma treatment strategies.

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Published on: May 14, 2012

Area of Science:

Biochemistry
Immunology
Pulmonology

Background:

Asthma pathogenesis involves dysregulated nitric oxide (NO) homeostasis.
L-arginine is a crucial substrate for both NO synthase (NOS) and arginase enzymes.
Competition between NOS and arginase for L-arginine impacts airway inflammation.

Purpose of the Study:

To investigate the role of arginine metabolism alterations in asthma.
To explore the link between arginine catabolism and airway dysfunction.
To identify novel therapeutic targets for asthma treatment.

Main Methods:

Analysis of arginine metabolome in asthma.
Assessment of nitric oxide synthase (NOS) and arginase enzyme activities.
Evaluation of L-arginine bioavailability and transport.

Main Results:

Aberrant arginine catabolism is implicated in asthma.
Excess arginase activity and elevated asymmetric dimethyl arginine levels are observed.
NOS dysfunction and altered arginine transport contribute to airway pathology.

Conclusions:

Arginine metabolism dysregulation represents a novel paradigm in asthma.
Low L-arginine bioavailability exacerbates asthma symptoms and airway remodeling.
Modulating arginine metabolism pathways holds promise for asthma therapy.