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A method to fix lipids for staining fat embolism in paraffin sections
1Department of Pathology, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA. RTRACY@LSUHSC.EDU
Histopathology
|July 18, 2002
Summary
This study introduces a new, cost-effective method for preserving tissue lipids in formalin-fixed samples for Oil Red O staining. The technique successfully demonstrates fat embolism, fatty liver, and atheroma in paraffin sections.
Area of Science:
- Histopathology
- Biochemistry
Background:
- Preserving lipids in formalin-fixed tissues for histological analysis is challenging.
- Existing methods may not adequately retain lipid integrity for staining.
Purpose of the Study:
- To develop and validate a practical method for preserving lipids in formalin-fixed tissues.
- To enable reliable lipid staining in paraffin-embedded sections.
Main Methods:
- Tissues were treated with a saturated linoleic acid solution in 70% ethylene glycol at 56°C.
- Subsequent treatment involved chromic acid and sodium bicarbonate solutions.
- Paraffin sections were stained using a lipid-soluble dye, Oil Red O.
Main Results:
- The method effectively preserved lipids for staining in paraffin sections.
- Successful visualization of fat embolism, fatty liver, and atheroma was achieved.
- High-quality tissue detail was obtained.
Conclusions:
- The developed method is practical, convenient, and inexpensive for demonstrating tissue lipids.
- It is broadly applicable to various lipid types, including those in adipose tissue, fatty liver, and atheroma.
- This technique enhances the diagnostic utility of lipid staining in histopathology.