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    Glycogen Storage Diseases/clinical biochemistry

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    Glycogen Storage Diseases/clinical biochemistry Empty Glycogen Storage Diseases/clinical biochemistry

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    Glycogen storage disease









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    Glycogen storage diseaseICD-10ICD-9MeSH
    Classification and external resources
    [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]
    Glycogen
    E74.0
    271.0
    D006008
    Glycogen storage disease (GSD, also glycogenosis and dextrinosis) is the result of defects in the processing of glycogen synthesis or breakdown within muscles, liver, and other cell types.[1] GSD has two classes of cause: genetic and acquired. Genetic GSD is caused by any inborn error of metabolism (genetically defective enzymes) involved in these processes. In livestock, acquired GSD is caused by intoxication with the alkaloid castanospermine.[2]

    Overall, according to a study in British Columbia, approximately 2.3 children per 100 000 births (1 in 43,000) have some form of glycogen storage disease.[3] In the United States, they are estimated to occur in 1 per 20,000-25,000 births.[4] A Dutch study estimated it to be 1 in 40,000.[5]

    [edit] Types



    [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]
    Micrograph of glycogen storage disease with histologic features consistent with Cori disease. Liver biopsy. H&E stain.


    There are eleven (11) distinct diseases that are commonly considered
    to be glycogen storage diseases (some previously thought to be distinct
    have been reclassified). (Although glycogen synthase
    deficiency does not result in storage of extra glycogen in the liver,
    it is often classified with the GSDs as type 0 because it is another
    defect of glycogen storage and can cause similar problems.)


    • GSD type VIII: In the past, considered a distinct condition.[6] Now classified with VI.[7] Has been described as X-linked recessive.[8]


    • GSD type X: In the past, considered a distinct condition.[9][10] Now classified with VI.[7]




    NumberEnzyme deficiencyEponymIncidenceHypo-
    glycemia?
    Hepato-
    megaly?
    Hyperlip-
    idemia?
    Muscle symptomsDevelopment/ prognosisOther symptoms
    GSD type Iglucose-6-phosphatasevon Gierke's disease1 in 50,000[4]- 100,000[11] birthsYesYesYesNoneGrowth failureLactic acidosis, hyperuricemia
    GSD type IIacid maltasePompe's disease1 in 60,000- 140,000 births[5]NoYesNoMuscle weakness*Death by age ~2 years (infantile variant)heart failure
    GSD type IIIglycogen debrancherCori's disease or Forbes' disease1 in 100,000 birthsYesYesYesMyopathy

    GSD type IVglycogen branching enzymeAndersen disease
    NoYes,
    also
    cirrhosis
    NoNoneFailure to thrive, death at age ~5 years
    GSD type Vmuscle glycogen phosphorylaseMcArdle disease1 in 100,000[12]NoNoNoExercise-induced cramps, Rhabdomyolysis
    Renal failure by myoglobinuria
    GSD type VIliver glycogen phosphorylaseHers' disease1 in 65,000- 85,000 births[13]YesYesNoNone

    GSD type VIImuscle phosphofructokinaseTarui's disease
    NoNoNoExercise-induced muscle cramps and weaknessgrowth retardationHaemolytic anaemia
    GSD type IXphosphorylase kinase, PHKA2-
    YesNoYesNoneDelayed motor development, Growth retardation
    GSD type XIglucose transporter, GLUT2Fanconi-Bickel syndrome
    YesYesNoNone

    GSD type XIIAldolase ARed cell aldolase deficiency
    ? ? ?Exercise intolerance, cramps

    GSD type XIIIβ-enolase-
    ? ? ?Exercise intolerance, crampsIncreasing intensity of myalgias over decades[14]Serum CK: Episodic elevations; Reduced with rest[14]
    GSD type 0glycogen synthase-
    YesNoNoOccasional muscle cramping

    [edit] References




    1. ^ "glycogen storage disease" at Dorland's Medical Dictionary
    2. ^ Stegelmeier
      BL, Molyneux RJ, Elbein AD, James LF (May 1995). "The lesions of
      locoweed (Astragalus mollissimus), swainsonine, and castanospermine in
      rats". Veterinary Pathology 32 (3): 289–98. doi:10.1177/030098589503200311. PMID 7604496.
    3. ^ Applegarth DA, Toone JR, Lowry RB (January 2000). "Incidence of inborn errors of metabolism in British Columbia, 1969-1996". Pediatrics 105 (1): e10. doi:10.1542/peds.105.1.e10. PMID 10617747.
    4. ^ a b eMedicine Specialties > Glycogen-Storage Disease Type I Author: Karl S Roth. Updated: Aug 31, 2009
    5. ^ a b Ausems MG, Verbiest J, Hermans MP, et al.
      (September 1999). "Frequency of glycogen storage disease type II in The
      Netherlands: implications for diagnosis and genetic counselling". Eur. J. Hum. Genet. 7 (6): 713–6. doi:10.1038/sj.ejhg.5200367. PMID 10482961.
    6. ^ Ludwig M, Wolfson S, Rennert O (October 1972). "Glycogen storage disease, type 8". Arch. Dis. Child. 47 (255): 830–3. doi:10.1136/adc.47.255.830. PMC 1648209. PMID 4508182.
    7. ^ a b "eMedicine - Glycogen-Storage Disease Type VI : Article by Lynne Ierardi-Curto".
    8. ^ "Definition: glycogen storage disease type VIII from Online Medical Dictionary".
    9. ^ Warren MF, Hamilton PB (January 1981). "Glycogen storage disease type X caused by ochratoxin A in broiler chickens". Poult. Sci. 60 (1): 120–3. PMID 6940112.
    10. ^ Huff WE, Doerr JA, Hamilton PB (January 1979). "Decreased glycogen mobilization during ochratoxicosis in broiler chickens". Appl. Environ. Microbiol. 37 (1): 122–6. PMC 243410. PMID 760630.
    11. ^ The Association for Glycogen Storage Disease > Type I Glycogen Storage Disease Type I GSD This page was created in October 2006.
    12. ^ [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]
    13. ^ eMedicine
      Specialties > Pediatrics: Genetics and Metabolic Disease >
      Metabolic Diseases > Glycogen-Storage Disease Type VI Author: Lynne Ierardi-Curto, MD, PhD. Updated: Aug 4, 2008
    14. ^ a b [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]



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