I Cell Disease

Synonyms

• Leroy Disease
• ML Disorder, Type II
• ML II
• Mucolipidosis II
• GNPTA
• N-Acetylglucosamine-1-Phosphotransferase Deficiency
• Inclusion Cell Disease

Disorder Subdivisions

• None

General Discussion

I-cell disease (mucolipidosis II) is a rare inherited metabolic disorder characterized by coarse facial features, skeletal abnormalities and mental retardation. The symptoms of I-cell disease are similar to but more severe than those of Hurler syndrome. The symptoms associated with this disorder typically become obvious during infancy and may include multiple abnormalities of the skull and face and growth delays.

This disorder belongs to a group of diseases known as lysosomal storage disorders. Lysosomes are particles bound in membranes within cells that break down certain fats and carbohydrates. Multiple enzyme deficiencies associated with I-cell disease lead to the accumulation of certain fatty substances (mucolipids) and certain complex carbohydrates (mucopolysaccharides) within the cells of many tissues of the body.

I-cell disease is caused by a mutation in the GNPTA gene that leads to a deficiency in the enzyme UDP-N-acetylglucoseamine-1-phosphotransferase. I-cell disease is inherited as an autosomal recessive genetic trait.
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Resources

CLIMB (Children Living with Inherited Metabolic Diseases)
Climb Building
176 Nantwich Road
Crewe, Intl CW2 6BG
United Kingdom
Tel: +44 870 7700 325
Fax: +44 870 7700 327
Email: info@climb.org.uk
Internet: http://www.CLIMB.org.uk

Vaincre Les Maladies Lysosomales
2 ter avenue de Fance
Massy, 91300
France
Tel: 01 69 75 40 30
Fax: 01 60 11 15 83
Email: accueil@vml-asso.org
Internet: http://www.vml-asso.org

The Arc (a national organization on mental retardation)
1010 Wayne Ave
Suite 650
Silver Spring, MD 20910
Tel: (301)565-3842
Fax: (301)565-3843
Tel: (800)433-5255
TDD: (817)277-0553
Email: info@thearc.org
Internet: http://www.thearc.org/

National MPS (Mucopolysaccharidoses/Mucolipidoses) Society, Inc.
PO Box 736
Bangor, ME 04402-0736
Tel: (207)947-1445
Fax: (207)990-3074
Email: info@mpssociety.org
Internet: http://www.mpssociety.org

NIH/National Digestive Diseases Information Clearinghouse
2 Information Way
Bethesda, MD 20892-3570
Tel: (301)654-3810
Fax: (301)907-8906
Tel: (800)891-5389
Email: nddic@info.niddk.nih.gov
Internet: http://www.niddk.nih.gov

Society for Mucopolysaccharide Diseases
46 Woodside Road
Amersham
Buckinghamshire, HP6 6AJ
United Kingdom
Tel: 004401494 434156
Fax: 004401494 434252
Email: mps@mpssociety.co.uk
Internet: http://www.mpssociety.co.uk

Canadian Society for Mucopolysaccharide and Related Diseases, Inc.
PO Box 64714
Unionville
Ontario, Intl L3R OM9
Canada
Tel: 905-479-8701
Fax: 905-479-8701
Tel: 800-667-1846
Email: lori.mps@rogers.com
Internet: http://www.mpssociety.ca

International Society for Mannosidosis & Related Diseases, Inc.
1030 Saxon Hill Drive
Cockeysville, MD 21030
USA
Tel: 4106289991
Email: pres@mannosidosis.org
Internet: http://www/mannosidosis.org

Hide & Seek Foundation for Lysosomal Disease Research
4123 Lankershim Blvd.
Suite 302
North Hollywood, CA 91602-2828
Tel: (818)762-8621
Fax: (818)762-2502
Email: info@hideandseek.org
Internet: http://www.hideandseek.org

For a Complete Report

This is an abstract of a report from the National Organization for Rare Disorders, Inc. ® (NORD). A copy of the complete report can be obtained for a small fee by visiting the NORD website. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational treatments (if available), and references from medical literature. For a full-text version of this topic, see http://www.rarediseases.org/search/rdblist.html

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: 9/17/2007
Copyright 1988, 1989, 1996, 2003, 2007 National Organization for Rare Disorders, Inc.