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Lipid quantitation in formalin-fixed liver sections.

M Mourelle1, V M Perez, M Rojkind

  • 1Department of Pharmacology, Centro de Investigacion y Estudios Avanzados, IPN, Mexico.

The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society
|December 1, 1988
PubMed
Summary
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This study presents a simple method to quantify fat (triglycerides) and protein in liver tissue. The technique accurately measures triglyceride levels, aiding in the assessment of liver disease progression.

Area of Science:

  • Biochemistry
  • Histology
  • Analytical Chemistry

Background:

  • Accurate quantification of triglycerides and proteins in fixed tissue is crucial for understanding liver pathology.
  • Existing methods may lack sensitivity or require complex procedures for formalin-fixed samples.

Purpose of the Study:

  • To develop a simple, sensitive, and quantitative method for measuring triglycerides and total protein content in formalin-fixed liver sections.
  • To establish a reliable technique for assessing fat accumulation in liver tissue.

Main Methods:

  • Utilizes selective binding of Sudan IV dye to triglycerides and Fast Green FCF dye to proteins.
  • Employs sequential elution with solvents (acetone for Sudan IV, NaOH-methanol for Fast Green) and spectrophotometric analysis.
  • Establishes color equivalence using micro-Kjeldahl analysis for protein and enzymatic procedures for triglycerides.

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Main Results:

  • The method can detect as little as 0.27 microgram of triglycerides per mg of protein.
  • Demonstrates a strong linear correlation (r² = 0.98) between chemically determined triglyceride content and the new method's results.
  • Provides accurate and reproducible quantification of both fat and protein.

Conclusions:

  • This novel procedure offers a straightforward and sensitive approach for quantifying fat and protein in fixed liver tissues.
  • The method is valuable for evaluating the progression of liver diseases characterized by steatosis.
  • Applicable for routine histological analysis and research in hepatology.