Home Reagents Clinical Chemistry Reagents Alanine Aminotransferase (ALT) (liquid) assay
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Alanine Aminotransferase (ALT) (liquid) assay

Product Method Size Catalog Price Quantity
Alanine Aminotransferase (ALT) (liquid) assay IFCC R1 6 x 51ml, R2 6 x 14ml AL3801 $282.23
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  • Format
    Liquid ready-to-use
  • Assay Range
    9.7 - 666 U/L
  • Working Stability 2-8 °C
    Stable to expiry
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Intended Use

An ALT test system is a device intended for the quantitative in vitro determination of Alanine Aminotransferase (ALT) activity in serum and plasma. This product is suitable for use on RX series instruments which includes the RX daytona and the RX imola.

UV Method

This is a modification of the optimized standard method according to the recommendations of the IFCC.

Clinical Significance

The aminotransferases are a group of enzymes that catalyse the interconversions of amino acids and -oxoacids by transfer of amino groups. The enzyme ALT (alanine aminotransferase or glutamate pyruvate transaminase) has been found to be in highest concentrations in the liver, with decreasing concentrations found in kidney, heart, skeletal muscle, pancreas, spleen and lung tissue respectively. ALT measurements are used in the diagnosis and treatment of certain liver diseases (e.g. viral hepatitis and cirrhosis) and heart diseases.

Elevated levels of the transaminases can indicate myocardial infarction, hepatic disease, muscular dystrophy and organ damage. Elevated levels of ALT in serum are rarely observed except in parenchymal liver disease, since ALT is a more liver specific enzyme.

The IFCC (International Federation of Clinical Chemistry) has now recommended standardized procedures for ALT determinations including:

1. Optimization of substrate concentrations

2. Employment of Tris buffers (instead of phosphate which has been shown to inhibit recombination of the apoenzyme with pyridoxal phosphate).

3. Preincubation of combined buffer and serum to allow side reactions with NADH to occur.

4. Substrate start (a-oxoglutarate).

5. Optional pyridoxal phosphate activation. This is an optimized standard method according to the concentrations recommended by the IFCC.

Principle

a-oxoglutarate reacts with L-alanine in the presence of ALT to form L-glutamate plus pyruvate. The indicator reaction utilizes the pyruvate for a kinetic determination of NADH consumption.

Available Applications

RX series instruments, including:

RX daytona

RX imola

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