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GM28756 LCL from B-Lymphocyte

Description:

CEREBRAL CREATINE DEFICIENCY SYNDROME 2; CCDS2
GUANIDINOACETATE METHYLTRANSFERASE; GAMT

Affected:

Yes

Sex:

Female

Age:

18 YR (At Sampling)

  • Overview
  • Characterizations
  • Phenotypic Data
  • Publications
  • External Links
  • Culture Protocols

Overview

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Repository NIGMS Human Genetic Cell Repository
Subcollection Heritable Diseases
PIGI Consented Sample
Biopsy Source Peripheral vein
Cell Type B-Lymphocyte
Tissue Type Blood
Transformant Epstein-Barr Virus
Sample Source LCL from B-Lymphocyte
Race White
Subject Type parent(s) and child(ren)
Ethnicity Not Hispanic/Latino
Ethnicity U.K.
Country of Origin USA
Family Member 1
Family History Y
Relation to Proband proband
Confirmation Molecular characterization before cell line submission to CCR
Species Homo sapiens
Common Name Human
Remarks Clinically affected. Substantial developmental delay, moderate intellectual disability, and mild epilepsy. Patient 2 of Viau 2013 (PMID: 24071436). Patient 25 of Stockler-Ipsiroglu (PMID: 24268530). Assessed for developmental disabilities at 3 years of age. Seizures began at 5 years of age. Treatment began at 5 years and 6 months of age for 30 months; improvement on developmental delay, speech delay and behavior, remaining mild epilepsy. Brother GM28757 is currently asymptomatic after early diagnosis and treatment. Mother is GM28759. Father is GM28758. Fibroblast line is GM28379 and iPSC line is GM28936.

Characterizations

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Gene GAMT
Chromosomal Location 19p13.3
Allelic Variant 1 p.V78E; CEREBRAL CREATINE DEFICIENCY SYNDROME 2; CCDS2
Identified Mutation c.233T>A
 
Gene GAMT
Chromosomal Location 19p13.3
Allelic Variant 2 R105GfsX26; CEREBRAL CREATINE DEFICIENCY SYNDROME 2; CCDS2
Identified Mutation c.299_c.311 dup13

Phenotypic Data

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Demographic Data
Relation to Proband proband
Age at Sampling 18 YR
Sex Female
Age of Onset(If not a control) 1 YR
Age at Diagnosis(If not a control) 5 YR
Hispanic or Latino/Not Hispanic or Latino Not Hispanic/Latino
Racial Category White
Country USA
 
Data Elements
Clinical Element Type: General NIGMS Catalog Remarks
  (Baseline)
Mutation Information
Gene, variant, consequence, and exon number:  GAMT, C.299_C.311DUP13 (P.R105G1AX2B), EXON 2
Zygosity:  Compound Heterozygous
Other variants:  GAMT, C.233T>A (P. V78E), EXON 2
Age of Symptom Onset and Age at Diagnosis
Age of Symptom Onset:  1 YEAR
Age at Diagnosis:  5 YEARS
In Utero History Information
Birth History Information
Dysmorphic Features
Neurological Symptoms
Seizures
Additional Information:  SEIZURES BEGAN AGE 5 WITH ABSENCE EPILEPSY AND GENERALIZED TONIC-CLONIC EPISODES BEGINNING AT AGE 10.
Optical and Audiological Symptoms
Musculoskeletal Symptoms
Developmental Milestones
Delayed speech and language development
Global developmental delay
Additional Information:  ACADEMIC DELAYS
Gastrointestinal Symptoms
Genitourinary Symptoms
Respiratory and Cardiovascular Symptoms
Cognitive and Behavioral Symptoms
Behavioral problems
Learning disability
Intellectual Disability:  Moderate
Additional Information:  CLINICALLY PROBLEMS WITH INHIBITION, EMOTIONAL CONTROL, PLANNING/ORGANIZATION, SELF-MONITORING, ATYPICALITY, WITHDRAWAL, AND FUNCTIONAL COMMUNICATIONS. DEFICITS IN ADAPTIVE FUNCTIONING AND DAILY FUNCTIONING SKILLS; POSITIVE EMOTIONAL AND BEHAVIORAL ADJUSTMENT.
Additional Information
Uncategorized Symptoms:  EUTHYMIC MOOD AND ALERT; SIGNIFICANT COGNITIVE SLOWING; LIMITED RECEPTIVE AND EXPRESSIVE LANGUAGE SKILLS WITH LIMITED VOCABULARY DEVELOPMENT; ARTICULATE AND INTELLIGIBLE SPEECH.
Testing Performed
Cognitive and Behavioral Testing:  WECHSLER INTELLIGENCE SCALE FOR CHILDREN; BEHAVIOR ASSESSMENT SYSTEM FOR CHILDREN; BEHAVIOR RATING INVENTORY OF EXECUTIVE FUNCTION (BRIEF). VERBAL COMPREHENSION (45) EXTREMELY LOW; VISUAL SPATIAL (45) EXTREMELY LOW; FLUID REASONING (61) EXTREMELY LOW; WORKING MEMORY (59) EXTREMELY LOW; PROCESSING SPEED (56) EXTREMELY LOW.
Treatments and Assistive Devices
Speech therapy
Communication or learning devices
Surgeries  LITHOTRIPSY, VAGAL NERVE STIMULATION, TOTAL SHOULDER ARTHROPASTY.
Medications
 LAMICTAL, ONFI.
Family History
 YOUNGER BROTHER IS CURRENTLY ASYMPTOMATIC DUE TO EARLY DIAGNOSIS AND TREATMENT.
Remarks Clinically affected. Substantial developmental delay, moderate intellectual disability, and mild epilepsy. Patient 2 of Viau 2013 (PMID: 24071436). Patient 25 of Stockler-Ipsiroglu (PMID: 24268530). Assessed for developmental disabilities at 3 years of age. Seizures began at 5 years of age. Treatment began at 5 years and 6 months of age for 30 months; improvement on developmental delay, speech delay and behavior, remaining mild epilepsy. Brother GM28757 is currently asymptomatic after early diagnosis and treatment. Mother is GM28759. Father is GM28758. Fibroblast line is GM28379 and iPSC line is GM28936.

Publications

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Stockler-Ipsiroglu S, van Karnebeek C, Longo N, Korenke GC, Mercimek-Mahmutoglu S, Marquart I, Barshop B, Grolik C, Schlune A, Angle B, Araújo HC, Coskun T, Diogo L, Geraghty M, Haliloglu G, Konstantopoulou V, Leuzzi V, Levtova A, Mackenzie J, Maranda B, Mhanni AA, Mitchell G, Morris A, Newlove T, Renaud D, Scaglia F, Valayannopoulos V, van Spronsen FJ, Verbruggen KT, Yuskiv N, Nyhan W, Schulze A, Guanidinoacetate methyltransferase (GAMT) deficiency: outcomes in 48 individuals and recommendations for diagnosis, treatment and monitoring Molecular genetics and metabolism111:16-25 2013
PubMed ID: 24268530
 
Viau KS, Ernst SL, Pasquali M, Botto LD, Hedlund G, Longo N, Evidence-based treatment of guanidinoacetate methyltransferase (GAMT) deficiency Molecular genetics and metabolism110:255-62 2013
PubMed ID: 24071436

External Links

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Gene Cards GAMT
Gene Ontology GO:0006601 creatine biosynthesis
GO:0006936 muscle contraction
GO:0008168 methyltransferase activity
GO:0016740 transferase activity
GO:0030731 guanidinoacetate N-methyltransferase activity
NCBI Gene Gene ID:2593
NCBI GTR 601240 GUANIDINOACETATE METHYLTRANSFERASE; GAMT
612736 CEREBRAL CREATINE DEFICIENCY SYNDROME 2; CCDS2
OMIM 601240 GUANIDINOACETATE METHYLTRANSFERASE; GAMT
612736 CEREBRAL CREATINE DEFICIENCY SYNDROME 2; CCDS2

Culture Protocols

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Split Ratio 1:6
Temperature 37 C
Percent CO2 5%
Percent O2 AMBIENT
Medium Roswell Park Memorial Institute Medium 1640 with 2mM L-glutamine or equivalent
Serum 15% fetal bovine serum Not Inactivated
Substrate None specified
Subcultivation Method dilution - add fresh medium
Supplement -
Pricing
Commercial/For-profit:
$373.00USD
Academic/Non-profit/Government:
$216.00USD
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