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15 patient data entries in database for mutation R1096C.

Entry
#
Mutations
allele 1allele 2
Clinical representationSymptomsAge groupAge of onsetAge of patientAge of deathReference
149R1096C3
P648R5
Onset at 53 years with PEO, neuropathy.
-PEO
adult
53n/an/aHorvath et al, 2006;

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182R1096C3
G848S1
Developmental delay, hypotonia, dementia/encephalopathy, exercise intolerance, muscle weakness, easy fatigability, ptosis, GI reflux, delayed gastric emptying, cyclic vomiting, hepatic failure, elevated transaminases, lactic acidosis, short statue, FTT. 53% mtDNA copy number in blood.
-lactic acidosis
-muscle weakness
-exercise intolerance
-ptosis
-liver failure
-failure to thrive
-hypotonic
-encephalopathy
-developmental delay
-dementia
-vomiting
-GI reflux
-cyclic vomiting
-delayed gastric emptying
infantile
n/a2n/aTang et al, 2011;

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199R1096C3
T914P1
reported as Alpers, onset at <1 year, presenting encephalopathy with epilepsy, hepatopathy, and movement disorder (ataxia). 7% mtDNA copy number in liver, 23% mtDNA copy number in muscle
-epilepsy
-movement disorder (ataxia)
-encephalopathy
-Alpers syndrome
-developmental delay
infantile
1n/an/aAshley et al, 2008;

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223R1096C3
R1096C3
Seizures, liver failure.
-liver failure
infantile
n/a1n/aTang et al, 2011;

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224R1096C3
R1096C3
Developmental delay, seizure, lactic acidosis, elevated transaminases. 50% mtDNA copy number in blood.
-lactic acidosis
-developmental delay
infantile
n/a2n/aTang et al, 2011;

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225R1096C3
R1096C3
Seizures, dementia/encephalopathy. 56% mtDNA copy number in blood.
-encephalopathy
-dementia
infantile
n/a0.8n/aTang et al, 2011;

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226R1096C3
Q1236H
R1096C3
Q1236H
Onset at 2 years with encephalopathy, hepatopathy, and myoclonus achalasia. Diagnosed as Alpers.
-myoclonic seizures
-encephalopathy
-Alpers syndrome
-developmental delay
-epilepsy
infantile
2n/an/aHorvath et al, 2006;

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355R1096C3
A467T2
CPEO, Ptosis, Peripheral neuropathy, COX-deficient fibers, ragged red fibers, presence of mitochondrial dna deletions in muscle, Sensory and motor neuronopathy, Distal and proximal neurogenic change
-peripheral neuropathy
-ragged red fibers
-ptosis
-PEO
juvenile
1742n/aLax et al, 2012a;

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358R1096C3
W748S5
CPEO, Ptosis, Peripheral neuropathy, COX-deficient fibers, ragged red fibers, presence of mitochondrial dna deletions in muscle, epilepsy, Severe sensory and moderate motor neuronopathy, Distal neurogenic change, proximal myopathy
-epilepsy
-peripheral neuropathy
-ragged red fibers
-myopathy
-ptosis
-PEO
adult
2549n/aLax et al, 2012a;

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477R1096C3
R1096C3
altered sensorium, seizures (requiring ventilation and critical-care management), hypotonia and mild hepatomegaly. Child deteriorated rapidly because of liver failure and died within two weeks of admission. Mainly hepatic failure and central nervous system (CNS) involvement (encephalopathy, seizures), high plasma lactate levels – and family history, a clinical diagnosis of mitochondrial disorder of the mtDNA depletion (Alpers – Huttenlocher syndrome or Pyruvate carboxylase deficiency) was made. mtDNA depletion syndrome.
-liver failure
-hypotonic
-encephalopathy
-Alpers syndrome
-hepatomegaly
-developmental delay
-epilepsy
infantile
0.30.60.6Bijarnia-Mahay et al, 2014;

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515R1096C3
L591F2
sensory ataxic neuropathy, dysarthria, ophthalmoplegia, and dysphagia. At the age of 41, progressive diplopia and ptosis were added to the symptoms. Five years later, she gradually had dysarthria and restless leg syndrome. ragged red fibers.
-sensory ataxia
-ragged red fibers
-ptosis
-ophthalmoplegia
-diplopia
-dysphagia
-dysarthria
adult
3848n/aKurt et al, 2012;

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587R1096C3
R1096C3
Alpers. Multifocal therapy-refractory epilepsy. hippocampal sclerosis. COX-negative fibers, reduced mtDNA copy number. mtDNA deletions.
-epilepsy
-cox-negative
-Alpers syndrome
-encephalopathy
-developmental delay
infantile
n/a1n/aStewart et al, 2011;

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620R1096C3
PEO, bilateral ptosis, severe limitation of ocular motility, and a mosaic distribution of ragged-red and cytochrome c oxidase negative fibers in the muscle biopsy. All patients had multiple deletions of muscle mtDNA.
-ragged red fibers
-cox-negative
-ptosis
-PEO
adult
23n/an/aAgostino et al, 2003;

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640R1096C3
Q1236H
R1096C3
Q1236H
developmental delay, dementia, seizures, Alpers, Family history of Alpers syndrome.
-developmental delay
-dementia
-Alpers syndrome
-encephalopathy
-epilepsy
infantile
1n/an/aWong et al, 2008;

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683R1096C3
R1096C3
Epilepsy, Cellular depletion, Hepatopathy
-epilepsy
infantile
0.42n/an/aAshley et al, 2008;

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1-5 pathogenic cluster assignment of mutations. Mutations displayed without a superscript number are outside of the assigned pathogenic clusters. See cluster definitions for details.

Number of displayed patient cases: 15
Avg age of onset in displayed cases: 11.2
Std dev in onset in displayed cases: 16.0

Search criteria for patient entries:
Mutations Entry IDs Clusters Reference Residue range
Mutations:
Allele 1:Allele 2:
Separate multiple mutations with commas.
Use "PNF" for non-missense mutations.
Match: Inclusive Exact
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