Overview: Succinic Acid TestIntroduction: The Succinic Acid Test measures succinic acid to diagnose mitochondrial disorders, causing fatigue or developmental delays, aiding in diagnosis and treatment. Affecting 1 in 5,000 people, mitochondrial disorders pose diagnostic challenges due to diverse symptoms. Following 2023 United Mitochondrial Disease Foundation (UMDF) guidelines, it uses GC-MS for high accuracy, supporting biochemistry screening. This test is essential for diagnosis, treatment planning, and improving outcomes in metabolism.
Other Names: Succinate Level Test, Mitochondrial Marker Assay.
FDA Status: Laboratory-developed test (LDT), meeting biochemistry standards for diagnostic reliability.
Historical Milestone: Succinic acid testing began in the 1980s with research by Robinson, who linked it to mitochondria. GC-MS advancements by Agilent improved detection, surpassing earlier HPLC methods.
Purpose: Measures succinic acid levels to diagnose mitochondrial disorders, guides supportive care or therapy, and evaluates patients with fatigue, aiming to manage symptoms.
Test Parameters: Succinic acid levels
Pretest Condition: No special preparation required. Collect urine or plasma. Report history of metabolic issues.
Specimen: Urine (sterile container, 5-20 mL), Plasma (NaHep, 2-4 mL); 10 mL urine in sterile container. Transport in a biohazard container.
Sample Stability at Room Temperature: 4 hours
Sample Stability at Refrigeration: 48 hours
Sample Stability at Frozen: 1 month
Medical History: Document fatigue or developmental delays. Include current medications or family history.
Consent: Written consent required, detailing the test's purpose, disease risks (e.g., organ failure), and sample collection risks.
Procedural Considerations: Uses GC-MS to measure levels, requiring labs with mass spectrometers. Results available in 2-3 days. Performed in labs with strict handling.
Factors Affecting Result Accuracy: Sample degradation or contamination can affect results. Medications may alter levels, requiring correlation.
Clinical Significance: Elevated levels suggest mitochondrial disorders, guiding therapy. Early treatment might slow progression, while untreated cases lead to worsening. Normal levels may require other tests.
Specialist Consultation: Consult a metabolic specialist for interpretation.
Additional Supporting Tests: Lactate levels, enzyme assays, or genetic panel to confirm diagnosis.
Test Limitations: Non-specific for cause; correlation with clinical status needed. False negatives possible with mild cases.
References: UMDF Guidelines, 2023; Journal of Inherited Metabolic Disease, Robinson BH, 2022.
