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- $Unique_ID{BRK03846}
- $Pretitle{}
- $Title{Hyperprolinemia Type II}
- $Subject{Hyperprolinemia Type II Pyrroline Carboxylate Dehydrogenase
- Deficiency Hyperprolinemia Type I }
- $Volume{}
- $Log{}
-
- Copyright (C) 1988, 1989 National Organization for Rare Disorders, Inc.
-
- 580:
- Hyperprolinemia Type II
-
- ** IMPORTANT **
- It is possible that the main title of this article (Hyperprolinemia Type
- II) is not the name you expected. Please check the SYNONYM list to find the
- alternate names and disorder subdivisions covered by this article.
-
- Synonyms
-
- Pyrroline Carboxylate Dehydrogenase Deficiency
-
- Information on the following disorder can be found in the Related
- Disorders section of this report:
-
- Hyperprolinemia Type I
-
- General Discussion
-
- ** REMINDER **
- The information contained in the Rare Disease Database is provided for
- educational purposes only. It should not be used for diagnostic or treatment
- purposes. If you wish to obtain more information about this disorder, please
- contact your physician and/or the agencies listed in the "Resources" section
- of this report.
-
- Hyperprolinemia Type II is a very rare hereditary disorder characterized
- by an abnormally high level of the amino acid proline in the urine. The high
- level of this substance is caused by a deficiency of the enzyme delta-1-
- pyrroline-5-carboxylic acid dehydrogenase. Mild mental retardation and
- seizures may occur in some cases.
-
- Symptoms
-
- Hyperprolinemia Type II is characterized by an abnormally high level of the
- amino acid proline in the blood. In some cases mild mental retardation
- and/or seizures may occur.
-
- Causes
-
- Hyperprolinemia Type II is a hereditary disorder transmitted by autosomal
- recessive genes. (Human traits, including the classic genetic diseases, are
- the product of the interaction of two genes for that condition, one received
- from the father and one from the mother. In recessive disorders, the
- condition does not appear unless a person inherits the same defective gene
- for the same trait from each parent. If one receives one normal gene and one
- gene for the disease, the person will be a carrier for the disease, but
- usually will show no symptoms. The risk of transmitting the disease to the
- children of a couple, both of whom are carriers for a recessive disorder, is
- 25 percent. Fifty percent of their children will be carriers, but healthy as
- described above. Twenty-five percent of their children will receive both
- normal genes, one from each parent, and will be genetically normal.)
-
- The high level of proline in the blood is caused by a deficiency of the
- enzyme delta-1-pyrroline-5-carboxylic acid dehydrogenase.
-
- Affected Population
-
- Hyperprolinemia Type II is a very rare disorder that is present at birth. It
- affects males and females in equal numbers.
-
- Related Disorders
-
- Symptoms of the following disorder are similar to those of Hyperprolinemia
- Type II. Comparisons may be useful for a differential diagnosis:
-
- Hyperprolinemia Type I is a hereditary condition characterized by an
- excessive level of proline in the blood. However, the levels of proline are
- lower than those in Type II Hyperprolinemia. This condition is caused by a
- deficiency of the enzyme proline dehydrogenase. It may be associated with
- kidney disease. (For more information, choose "Hyperprolinemia Type I" as
- your search term in the Rare Disease Database.)
-
- Therapies: Standard
-
- Symptoms of Hyperprolinemia Type II can be avoided by a carefully controlled
- low-protein diet.
-
- Therapies: Investigational
-
- This disease entry is based upon medical information available through
- December 1988. 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.
-
- Resources
-
- For more information on Hyperlinemia Type II, please contact:
-
- National Organization for Rare Disorders (NORD)
- P.O. Box 8923
- New Fairfield, CT 06812-1783
- (203) 746-6518
-
- National Digestive Diseases Information Clearinghouse
- Box NDDIC
- Bethesda, MD 20892
- (301) 468-6344
-
- Research Trust for Metabolic Diseases in Children
- Golden Gates Lodge, Weston Rd.
- Crewe CW1 1XN, England
- Telephone: (0270) 250244
-
- For information on genetics and genetic counseling referrals, please
- contact:
-
- March of Dimes Birth Defects Foundation
- 1275 Mamaroneck Avenue
- White Plains, NY 10605
- (914) 428-7100
-
- Alliance of Genetic Support Groups
- 35 Wisconsin Circle, Suite 440
- Chevy Chase, MD 20815
- (800) 336-GENE
- (301) 652-5553
-
- References
-
- MENDELIAN INHERITANCE IN MAN, 8th ed.: Victor A. McKusick; Johns Hopkins
- University Press, 1986. Pp. 1002-1003.
-
- THE METABOLIC BASIS OF INHERITED DISEASE, 5th ed.: John B. Stanbury, et
- al., eds; McGraw Hill, 1983. Pp. 367-373.
-
- HYPERPROLINEMIA TYPE II: IDENTIFICATION OF THE GLYCINE CONJUGATE OF
- PYRROLE-2-CARBOXYLIC ACID IN URINE: K.C. Dooley, et al.; Clin Biochem (April
- 1979: issue 12(2)). Pp. 62-65.
-
- HYDROXYPROLINE METABOLISM IN TYPE II HYPERPROLINEMIA: S. Simila; Ann
- Clin Biochem (July 1979: issue 16(4)). Pp. 177-181.
-
-