Tissue porphyrin pattern determination by high-speed high-performance liquid chromatography

Area of Science:

• Analytical Chemistry
• Biochemistry
• Toxicology

Background:

• Porphyrin carboxylic acids are biomarkers for various metabolic disorders.
• Accurate and rapid quantification of these compounds in biological tissues is essential for diagnosis and research.

Purpose of the Study:

• To develop and validate a rapid and sensitive method for determining porphyrin carboxylic acids in liver, kidney, and spleen.
• To establish efficient extraction and chromatographic separation techniques for these analytes.

Main Methods:

• Extraction of porphyrins from tissue samples with high recovery rates (>=98%).
• Concentration of extracted porphyrins using disposable octadecylsilyl cartridges.
• Analysis via high-speed high-performance liquid chromatography (HPLC) with a fluorescence detector.
• Utilized a short, high-efficiency octadecylsilyl column (3 microns X 3 cm) for rapid separation.

Main Results:

• Achieved separation of di-, tetra-, penta-, hexa-, hepta-, and octacarboxylic porphyrins within 5 minutes.
• Demonstrated low detection limits: 20 fmol for uroporphyrin, 10 fmol for coproporphyrin, and 20 fmol for protoporphyrin.
• The method is rapid, sensitive, and suitable for analyzing multiple porphyrin types.

Conclusions:

• The described high-speed HPLC method provides a robust and efficient approach for quantifying porphyrin carboxylic acids in biological tissues.
• This technique facilitates faster and more accurate diagnosis of porphyrin-related metabolic diseases.
• The method's sensitivity and speed make it valuable for both clinical diagnostics and biochemical research.