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    N-Acetylglutamate Synthetase Deficiency

    Important
    It is possible that the main title of the report N-Acetylglutamate Synthetase Deficiency is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.

    Synonyms

    • hyperammonemia due to N-acetylglutamate synthetase deficiency
    • NAGS deficiency

    Disorder Subdivisions

    • None

    General Discussion

    N-acetylglutamate synthetase (NAGS) deficiency is a rare genetic disorder characterized by complete or partial lack of the enzyme N-acetylglutamate synthetase (NAGS). NAGS is one of six enzymes that play a role in the break down and removal of nitrogen from the body, a process known as the urea cycle. The lack of the NAGS enzyme results in excessive accumulation of nitrogen, in the form of ammonia, in the blood (hyperammonemia). Excess ammonia, which is a neurotoxin, travels to the central nervous system through the blood, resulting in the symptoms and physical findings of NAGS deficiency. Symptoms include vomiting, refusal to eat, progressive lethargy, and coma. NAGS deficiency is inherited as an autosomal recessive trait.

    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.

    Resources

    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
    Internet: http://www.CLIMB.org.uk

    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
    Internet: http://www.nucdf.org

    American Kidney Fund, Inc.
    11921 Rockville Pike
    Suite 300
    Rockville, MD 20852
    USA
    Tel: (800)638-8299
    Email: helpline@kidneyfund.org
    Internet: http://www.kidneyfund.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
    Internet: http://www.kidney.org

    NIH/National Institute of Diabetes, Digestive & Kidney Diseases
    Office of Communications & Public Liaison
    Bldg 31, Rm 9A06
    31 Center Drive, MSC 2560
    Bethesda, MD 20892-2560
    Tel: (301)496-3583
    Email: NDDIC@info.niddk.nih.gov
    Internet: http://www2.niddk.nih.gov/

    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
    TDD: (888)205-3223
    Internet: http://rarediseases.info.nih.gov/GARD/

    Madisons Foundation
    PO Box 241956
    Los Angeles, CA 90024
    Tel: (310)264-0826
    Fax: (310)264-4766
    Email: getinfo@madisonsfoundation.org
    Internet: http://www.madisonsfoundation.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
    Internet: 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). A copy of the complete report can be downloaded free from the NORD website for registered users. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational therapies (if available), and references from medical literature. For a full-text version of this topic, 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. NORD recommends that affected individuals seek the advice or counsel of their own personal physicians.

    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.

    For additional information and assistance about rare disorders, please contact the National Organization for Rare Disorders at P.O. Box 1968, Danbury, CT 06813-1968; phone (203) 744-0100; web site www.rarediseases.org or email orphan@rarediseases.org

    Last Updated: 3/17/2011
    Copyright 1986, 1987, 1990, 1992, 1993, 1997, 1998, 2001, 2011 National Organization for Rare Disorders, Inc.

    WebMD Medical Reference from the National Organization for Rare Disorders

    Last Updated: May 28, 2015
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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