Argininosuccinic Aciduria

National Organization for Rare Disorders, Inc.

Skip to the navigation

Important
It is possible that the main title of the report Argininosuccinic Aciduria is not the name you expected.

Disorder Subdivisions

  • None

General Discussion

Argininosuccinic aciduria is a rare genetic disorder characterized by deficiency or lack of the enzyme argininosuccinate lyase (ASL). This enzyme is one of six enzymes that play a role in the breakdown and removal of nitrogen from the body, a process known as the urea cycle. The lack of this argininosuccinate lyase results in excessive accumulation of nitrogen, in the form of ammonia (hyperammonemia), in the blood. Ammonia is a neurotoxin, which means that it damages or inhibits the function of neurons, the cells of the central nervous system. Excess ammonia travels to the central nervous system through the blood, resulting in the symptoms and physical findings associated with the disorder. Affected infants may experience vomiting, refusal to eat, progressive lethargy, and coma. Argininosuccinic aciduria is inherited as an autosomal recessive trait.


Introduction

The urea cycle disorders are a group of rare disorders affecting the urea cycle, a series of biochemical processes in which nitrogen is converted into urea and removed from the body through the urine. Nitrogen is a waste product of protein metabolism. Failure to break down nitrogen results in the abnormal accumulation of nitrogen, in the form of ammonia, in the blood.

Supporting Organizations

American Kidney Fund, Inc.

11921 Rockville Pike
Suite 300
Rockville, MD 20852
USA
Tel: (800)638-8299
Email: helpline@kidneyfund.org
Website: http://www.kidneyfund.org

CLIMB (Children Living with Inherited Metabolic Diseases)

Climb Building
176 Nantwich Road
Crewe, CW2 6BG
United Kingdom
Tel: 4408452412173
Fax: 4408452412174
Email: enquiries@climb.org.uk
Website: http://www.CLIMB.org.uk

Genetic and Rare Diseases (GARD) Information Center

PO Box 8126
Gaithersburg, MD 20898-8126
Tel: (301)251-4925
Fax: (301)251-4911
Tel: (888)205-2311
Website: http://rarediseases.info.nih.gov/GARD/

Medical Home Portal

Dept. of Pediatrics
University of Utah
Salt Lake City, UT 84158
Tel: (801)587-9978
Fax: (801)581-3899
Email: mindy.tueller@utah.edu
Website: http://www.medicalhomeportal.org

National Kidney Foundation

30 East 33rd Street
New York, NY 10016
Tel: (212)889-2210
Fax: (212)689-9261
Tel: (800)622-9010
Email: info@kidney.org
Website: http://www.kidney.org

National Urea Cycle Disorders Foundation

75 South Grand Avenue
Pasadena, CA 91105-1602
Tel: (626)578-0833
Fax: (626)578-0823
Tel: (800)386-8233
Email: info@nucdf.org
Website: http://www.nucdf.org

Urea Cycle Disorders Consortium

Children's National Medical Center
111 Michigan Avenue, NW
Washington, DC 20010
Tel: (815)333-4014
Email: jseminar@cnmc.org
Website: http://rarediseasesnetwork.epi.usf.edu/ucdc/index.htm

For a Complete Report

This is an abstract of a report from the National Organization for Rare Disorders (NORD). For a full-text version of this report, go to www.rarediseases.org and click on Rare Disease Database under "Rare Disease Information".

The information provided in this report is not intended for diagnostic purposes. It is provided for informational purposes only.

It is possible that the title of this topic is not the name you selected. Please check the Synonyms listing to find the alternate name(s) and Disorder Subdivision(s) covered by this report.

This disease entry is based upon medical information available through the date at the end of the topic. Since NORD's resources are limited, it is not possible to keep every entry in the Rare Disease Database completely current and accurate. Please check with the agencies listed in the Resources section for the most current information about this disorder.

Last Updated:  1/4/2016
Copyright  2016 National Organization for Rare Disorders, Inc.