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Laboratory: Clinical Biochemistry  (METABOLIC)
Test Name:
ALPHA-AMINOADIPIC SEMIALDEHYDE - (U)
Test Code: MISM
Clinical Information:
Alternate Name(s): AASA, Piperidine-6-carboxylic Acid, P6C, Pyridoxine-Dependent Seizures

Description: Measurement of urine alpha-aminoadipic semialdehyde acid by LC-MSMS

Recommendations: Please ensure all required information including patient’s clinical history and indication is provided on the requisition.
Collection Devices:
Specimen Required:
Urine: 5.0 mL
Pediatric Urine: 1.0 mL

Pediatric Volume: 1.0-5.0 mL

Collection Information: Random urine. No preservatives.

Special Processing: Place urine on ice following collection and forward to the laboratory.
Sample MUST be frozen upon receipt in the laboratory (within 2 hours).
Compound is very unstable at RT or refrigerated

Specimen Stability:
Ambient: Not stable
Refrigerated: Not stable
Frozen: Indefinitely
Other comments: Avoid any thawing!
Referral:

Shipping & Storage: Store and ship frozen to Biochemical Genetics Lab (HSC).
Send the original requisition or a clear copy with the sample.
Referred Out Location: Medical Neurogenetics Laboratories (MNG/LabCorp), Test: MET20
Requisition:
Reference Values:
Reference values provided on report from testing laboratory.
Method of Analysis: Liquid Chromatography Mass Spectrometry (LC-MSMS)
Availability:
Within 3 Weeks
Prior arrangements with Metabolic Lab (Dr. Seargeant).
See Also:
More Information:
Send specimen on ice to Health Sciences Centre, Biochemistry Laboratory MS551 for referral to VU University Medical Center.
Sample must be frozen upon receipt in the laboratory.  Freeze within 2 hours of collection
To ship to The Netherlands, ship frozen samples packed well in ice packs frozen @ -70C via FedEx (dry ice desirable, but not used due to shipping restrictions) to:
Dr G. Salomons / Dr C. Jakobs
VU University Medical Center
Dept Clinical Chemistry, Metabolic Unit
Polikliniek rec K (PK 1X 009)
De Boelelaan 1117
1081 HV Amsterdam
The Netherlands
Phone:  +31 20 444 2914/ 2880
Fax:  + 31 20 444 0305
Email:  g.salomons@vumc.nl
Email:  C.Jakobs@vumc.nl

Interpretation & Assay Interferences: This test can be done regardless of pyridoxine therapy.