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Myoadenylate Deaminase Deficiency

AMP Deaminase Deficiency

Myoadenylate deaminase deficiency is one of the most common metabolic disorders of the skeletal muscles and is characterized by mutations in genes responsible for the production of this enzyme. The predominant symptoms are myalgia, predisposition to fatigue and exercise intolerance, as well as muscle cramping that can last for years before the condition is recognized. Although a clinical diagnosis can be made based on findings obtained during history taking and the physical examination, biochemical tests, muscle biopsy, and genetic studies are necessary for confirmation.


Presentation

The clinical presentation of myoadenylate deaminase deficiency stems from the absence of the enzyme that facilitates the conversion of adenosine monophosphate (AMP) to inosine monophosphate (IMP) and ammonia (NH3) as a byproduct [1] [2]. As this process plays an important role in the generation of energy, the vast majority of patients reports symptoms that are related to exercise and physical activity [1] [3] [4]. Skeletal muscle pain (myalgia, which is sometimes be accompanied by cramping), frequent reports of fatigue, and weakness are the principal complaints [1] [3] [4] [5] [6]. Virtually any skeletal muscle can be affected - the facial muscles, the upper and lower extremities, or even a generalized presentation may be seen, and atrophy might also be reported [4] [6]. The duration of symptoms is quite long before the diagnosis is made, as up to 10 years may pass before clinical suspicion is raised [1] [3] [4] [5] [6]. An atypical presentation of constant muscle pain without an exertional association has been noted in rare cases [6]. The prevalence of myoadenylate deaminase deficiency is high: between 1-2% of the population is established to suffer from mutations that produce this effect. The deficiency shows an autosomal recessive pattern of inheritance with a very broad phenotypic range [2]. Furthermore, other neuromuscular diseases may be concomitantly present [2] [3], which is why the diagnosis of myoadenylate deaminase deficiency may not be easy to make.

Fatigue
  • The individuals with MDD fatigued after performing only 28% as much work as their non-MDD counterparts. Muscle biopsies were obtained from the four MDD patients and the eight non-MDD patients at rest and following exercise to the point of fatigue.[doi.org]
  • Skeletal muscle pain (myalgia, which is sometimes be accompanied by cramping), frequent reports of fatigue, and weakness are the principal complaints.[symptoma.com]
  • People who do experience symptoms typically have fatigue, muscle pain (myalgia), or cramps after exercise or prolonged physical activity (exercise intolerance).[ghr.nlm.nih.gov]
  • Assessed by the fatigue index, the decrease in power output at 15 s of exercise was significantly greater in the deficient group compared with the other genotypes (P 0.0006).[ncbi.nlm.nih.gov]
Myalgia
  • A diagnosis of tension myalgia or myofascial-type pain is often considered when no objective findings are seen in the evaluation.[ncbi.nlm.nih.gov]
  • This finding casts doubt on the clinical significance of MAD deficiency and the relationship of the deficiency state with exertional myalgia.[ncbi.nlm.nih.gov]
  • Although most deficient subjects are asymptomatic, some suffer from exercise-induced myalgia suggesting a causal relationship between a lack of enzyme activity and muscle function.[ncbi.nlm.nih.gov]
  • Skeletal muscle pain (myalgia, which is sometimes be accompanied by cramping), frequent reports of fatigue, and weakness are the principal complaints.[symptoma.com]
  • Abstract This report concerns two unrelated males; one had sarcoidosis, sarcoid myopathy and muscle weakness, and the other had exercise-induced weakness and myalgia.[ncbi.nlm.nih.gov]
Muscle Weakness
  • Abstract This report concerns two unrelated males; one had sarcoidosis, sarcoid myopathy and muscle weakness, and the other had exercise-induced weakness and myalgia.[ncbi.nlm.nih.gov]
  • She had slight muscle weakness in her facial and upper extremities, and severe muscle weakness and atrophy in lower extremities more marked in the proximal portions. Serum creatine kinase was slightly elevated.[ncbi.nlm.nih.gov]
  • Woman with Leg Weakness and Atrophic Muscle Fibers on Biopsy 554 Case 89A A Woman with Muscle Weakness and a Skin Rash 559 Case 90 A Man with Muscle Pains 567 Case 91 An Older Woman with Progressive Muscle Weakness 572 Case 92 An HIVInfected Man with[books.google.com]
  • Abstract We report a 20-year-old man with gigantism syndrome, hypertrophic cardiomyopathy, muscle weakness, exercise intolerance, and severe psychomotor retardation since childhood.[ncbi.nlm.nih.gov]
  • The lack of AMP deaminase activity can result in fatigue, muscle weakness or pain, or other muscle problems in some people with AMP deaminase deficiency. It is not known why some people with this condition do not experience symptoms.[ghr.nlm.nih.gov]
Muscle Cramp
  • In contrast, 35 unrelated patients presenting with exercise-related muscle cramps or pains showed normal histochemical MAD activity.[ncbi.nlm.nih.gov]
  • Children with "primary" MADA deficiency typically have symptoms including muscle cramps, stiffness, and post-exercise myalgia and weakness.[ncbi.nlm.nih.gov]
  • Abstract We have examined two Caucasian brothers with myoadenylate deaminase (AMPD) deficiency who presented with exercise intolerance and muscle cramps.[ncbi.nlm.nih.gov]
  • Myoadenylate deaminase deficiency (MAD) constitutes the most common genetically determined enzymatic defect of the skeletal muscle (2% of the population), however, it causes clinical symptoms such us exercise-related muscle cramps and pain in quite a[neurologia.com]
  • Although occasionally diagnosed in infancy, when muscle biopsy is performed on a hypotonic but normoreflexic child, the deficiency is usually not symptomatic until adult or middle age, when muscle cramping and exercise intolerance develop.[ncbi.nlm.nih.gov]
Muscular Atrophy
  • The diagnoses in the 13 patients were: polyneuropathy (n 5), infantile spinal muscular atrophy (n 3), congenital myopathy with type 2 fibre atrophy, facioscapulohumeral myopathy, polymyositis, myotonic dystrophy and hyperornithinaemia with gyrate atrophy[ncbi.nlm.nih.gov]
  • He is currently involved in multiple clinical trials of novel genetic interventions for the treatment of spinal muscular atrophy and Duchenne muscular dystrophy.[books.google.com]
  • Spinal muscular atrophies: Amyotrophic lateral sclerosis (ALS), or motor neuron disease Infantile progressive spinal muscular atrophy Intermediate spinal muscular atrophy Juvenile spinal muscular atrophy Adult spinal muscular atrophy Inflammatory myopathies[hopkinsmedicine.org]
  • MAD deficiency have been described in muscle biopsy of patients with polyneuropathy, infantile spinal muscular atrophy, congenita myopathy with type-2 fiber atrophy, facioscapulohumeral myopathy, polymyositis, dermatomyositis, myotonic dystrophy, limb-girdle[scielo.br]
Exercise-induced Muscle Pain
  • A 55 years old patient suffering from exercise-induced muscle pain and stiffness due to primary myoadenylate deaminase deficiency has been successfully treated with D-ribose since 1984: single doses of 4 grams administered at the beginning of exercise[ncbi.nlm.nih.gov]
  • muscle pain, occasionally rhabdomyolysis, and idiopathic hyperCKemia.[semanticscholar.org]
  • Hübner Summary A 55 years old patient suffering from exercise-induced muscle pain and stiffness due to primary myoadenylate deaminase deficiency has been successfully treated with D-ribose since 1984: single doses of 4 grams administered at the beginning[doi.org]
  • Observations on two brothers with exercise-induced muscle pain. J Neurol Sci 53:125–136 Google Scholar 19. Heffner RR (1980) Myoadenylate deaminase deficiency. J Neuropathol Exp Neurol 39:360 Google Scholar 20.[link.springer.com]
Areflexia
  • 67 An Elderly Woman with a Progressive Neuropathy 429 Case 68 A Young Woman with Difficulty Swallowing 433 Case 69 A Young Woman with Intermittent Weakness and a Positive Family History of Similar Problems 436 Case 70 A Woman with Muscle Weakness and Areflexia[books.google.com]

Workup

The diagnostic workup of myoadenylate deaminase deficiency should start with a thorough patient history that will reveal the symptoms and their duration, as well as onset and progression. Clinical suspicion can be raised when an association is made between exercise and the appearance of complaints, in which case a more detailed approach should be sought. Elevation of creatine kinase (CK) is nonspecific, but very frequently found in this patient population [3] [5]. One of the key laboratory tests that point to a deficiency of myoadenylate deaminase is the evaluation of lactate, pyruvate, and ammonia levels 10 minutes after resting from physical activity [1] [2] [5]. In this condition, the normal rise in lactate is typically not followed by elevations of ammonia [2]. To further solidify the diagnosis, a muscle biopsy that uses specific stains to determine enzymatic activity is recommended by some authors [2] [3] [4] [6]. As a definitive method, genetic studies that detect mutations in the MAD gene located on chromosome 1 may be employed [2] [3] [7].

Treatment

  • The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment.[orpha.net]
  • As in the first edition, treatment is discussed extensively. Details are given for dietary treatment and drug administrations in acute situations, during infections and in maintenance treatment.[books.google.com]
  • L-Carnitine treatment led to gradual improvement in exercise tolerance and cognitive performance; plasma and tissue carnitine levels returned to normal, and echocardiographic evidence of left ventricular hypertrophy disappeared.[ncbi.nlm.nih.gov]
  • It seems to be the primary unassociated MAD deficiency that has recently become amenable to successful treatment with D-ribose in high doses.[ncbi.nlm.nih.gov]
  • The aim of the book is to enhance our understanding and treatment of skeletal muscle disorders.[books.google.com]

Prognosis

  • Other muscle enzymes are also depleted, although not as severely, and the prognosis in such cases is dictated by the primary disease.[ncbi.nlm.nih.gov]
  • Prognosis - Adenosine monophosphate deaminase deficiency Not supplied. Treatment - Adenosine monophosphate deaminase deficiency Not supplied. Resources - Adenosine monophosphate deaminase deficiency[checkorphan.org]
  • To date, genetic determinants of prognosis and survival in patients with heart failure have not been established.[j-circ.or.jp]
  • Ai-Fang Feng, Zhong-Hui Liu, Shu-Long Zhou, Shi-Yuan Zhao, Yan-Xin Zhu and Huai-Xin Wang , Effects of AMPD1 gene C34T polymorphism on cardiac index, blood pressure and prognosis in patients with cardiovascular diseases: a meta-analysis , BMC Cardiovascular[doi.org]

Etiology

  • Etiology The vast majority of patients with this disease are homozygous for the nonsense C34-T mutation in the AMPD1 (adenosine monophosphate deaminase 1) gene.[orpha.net]
  • Deficiency of myoadenylate deaminase is heterogeneous in etiology and results in derangement of purine nucleotide catabolism and interconversion.[ommbid.mhmedical.com]
  • Molecular epidemiology seeks to determine whether a biologically-plausible candidate gene with an association to a well-defined disease affects 1) etiology, 2) risk stratification, 3) prognosis, and 4) design of novel therapeutic interventions.[j-circ.or.jp]
  • Sixty indoor patients, admitted to our hospital, having pleural effusions and suffering from varying etiologies were included in this study.[ncbi.nlm.nih.gov]

Epidemiology

  • Summary Epidemiology About 1-2% of the Caucasian population carries the genetic defect causing myoadenylate deaminase deficiency, but only a minority of carriers develop symptoms.[orpha.net]
  • […] joint symposium held in Gmunden, Austria in June 1997 (and dedicated to the memory of Andre deVries), these 164 papers are relevant to research interests in molecular biology, biochemical pharmacology, biochemistry, developmental biology, immunology, epidemiology[books.google.com]
  • PAGE TOP Molecular epidemiology in heart failure A molecular epidemiology approach was used to determine predictors of survival in patients with heart failure.[j-circ.or.jp]
  • It appears that the general spectrum of myopathies described in the world literature is also seen in India, although the prevalence is difficult to ascertain, as there is very little published epidemiological data.[annalsofneurosciences.org]
Sex distribution
Age distribution

Pathophysiology

  • For more detailed information, particularly with respect to pathophysiology and genetics, we highly recommend the seventh edition of The Metabolic Basis of Inherited Disease, by Charles R. Scriver et al. (McGraw-Hill, 1995).[books.google.com]
  • References Ording H: Pathophysiology of malignant hyperthermia.[anesthesiology.pubs.asahq.org]
  • The genetic background of a person likely plays a role in determining the response to the complex pathophysiology of heart failure. To date, genetic determinants of prognosis and survival in patients with heart failure have not been established.[j-circ.or.jp]
  • ., 2001, Statin myopathies: pathophysiologic and clinical perspectives. Clin. Invest. Med. 24: 258–272. PubMed Google Scholar Baker, S.K., and Tarnopolsky, M.A., 2003, Targeting cellular energy production in neurological disorders. Expert Opin.[doi.org]

Prevention

  • 55 years old patient suffering from exercise-induced muscle pain and stiffness due to primary myoadenylate deaminase deficiency has been successfully treated with D-ribose since 1984: single doses of 4 grams administered at the beginning of exercise prevented[ncbi.nlm.nih.gov]
  • This mutation creates an early stop codon thus preventing the synthesis of an enzymatically active protein. The deficiency disrupts the purine nucleotide cycle, and thus muscle energy production.[orpha.net]
  • Prevention - Adenosine monophosphate deaminase deficiency Not supplied. Diagnosis - Adenosine monophosphate deaminase deficiency Not supplied. Prognosis - Adenosine monophosphate deaminase deficiency Not supplied.[checkorphan.org]
  • Successful aging and Vitality - maintaining Wellness Boosting Immunity - - Ross river fever - Glandular Fever - Sinus - Hayfever - Asthma - Flu prevention.[vmknaturopath.com]

References

Article

  1. Rannou F, Uguen A, Scotet V, et al. Diagnostic Algorithm for Glycogenoses and Myoadenylate Deaminase Deficiency Based on Exercise Testing Parameters: A Prospective Study. PLoS One. 2015;10(7):e0132972.
  2. Tarnopolsky MA, Parise G, Gibala MJ, Graham TE, Rush JWE. Myoadenylate deaminase deficiency does not affect muscle anaplerosis during exhaustive exercise in humans. J Physiol. 2001;533(Pt 3):881-889.
  3. Teijeira S, San Millán B, Fernández JM, et al. Myoadenylate deaminase deficiency: clinico-pathological and molecular study of a series of 27 Spanish cases. Clin Neuropathol. 2009;28(2):136-142.
  4. Abe M, Higuchi I, Morisaki H, Morisaki T, Osame M. Myoadenylate deaminase deficiency with progressive muscle weakness and atrophy caused by new missense mutations in AMPD1 gene: case report in a Japanese patient. Neuromuscul Disord. 2000;10(7):472-477.
  5. Lim L, Palayer M, Bruneau A, et al. Myoadenylate deaminase deficiency: a frequent cause of muscle pain A case detected by exercise testing. Ann Biol Clin (Paris). 2017;75(4):445-449.
  6. Ahmed A, Lowden MR. Chronic Non-Exertional Myalgia and Myoadenylate Deaminase Deficiency: a Possible Association. J Clin Med Res. 2009;1(1):56-57.
  7. Morisaki T, Gross M, Morisaki H, Pongratz D, Zöllner N, Holmes EW. Molecular basis of AMP deaminase deficiency in skeletal muscle. Proc Natl Acad Sci U S A. 1992;89(14):6457-6461.

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Last updated: 2018-06-21 17:51