Overview on Techniques to Construct Tissue Arrays with Special Emphasis on Tissue Microarrays

Area of Science:

• Biopathology
• Molecular Biology
• Histopathology

Background:

• Advancements in histopathological staining (e.g., immunohistochemistry) and molecular biology discoveries necessitate efficient methods for comparing multiple tissue samples.
• Existing techniques require cost-effective solutions for analyzing diverse cells or tissues on a single slide while maintaining specimen traceability.

Purpose of the Study:

• To introduce and describe the tissue array (TA) as a technique for comparative analysis of multiple biological specimens.
• To highlight the versatility and cost-effectiveness of TA construction methods.

Main Methods:

• Tissue arrays involve placing at least two different specimens on a single slide.
• Construction methods include arranging specimens in a mold and embedding, or manually/automatically placing biopsies into pre-formed recipient blocks.
• TA construction varies in specimen type, number, dimensions, arrangement, embedding medium, and preparation techniques.

Main Results:

• Tissue arrays facilitate the simultaneous analysis of multiple tissue specimens.
• Construction costs range from low to high depending on the chosen technique and equipment.
• High-quality tissue arrays can be produced using cost-effective methods.

Conclusions:

• Tissue arrays offer a valuable tool for comparative histopathological and molecular studies.
• The technique provides a flexible and cost-effective approach to analyzing multiple specimens, adaptable to various research requirements.
• Diverse construction strategies allow for optimization based on budget and desired array characteristics.