Multiplex Immunochromogenic Tissue Staining Employing Primary Antibodies from the Same Species

Area of Science:

• Biomedical Sciences
• Pathology
• Biotechnology

Background:

• Chromogenic immunohistochemistry (IHC) is crucial for disease diagnosis, particularly cancer.
• Current clinical diagnostic assays typically use single-marker IHC.
• Multiplex IHC offers contextual biomarker information but faces limitations in simultaneous chromogenic staining, especially with antibodies from the same species.

Purpose of the Study:

• To describe novel manual and automated protocols for simultaneous chromogenic multiplex IHC.
• To introduce the UltraPlex™ mxIHC technology for enhanced biomarker detection.
• To overcome limitations of existing multiplex IHC methods.

Main Methods:

• Development and validation of manual and automated protocols using UltraPlex™ mxIHC technology.
• Simultaneous detection of up to three biomarkers on a single tissue section.
• Utilized a single heat-induced antigen retrieval step.
• Employed primary antibodies from any species.
• Tested on formaldehyde-fixed paraffin-embedded (FFPE) tissues.

Main Results:

• Successful simultaneous chromogenic detection of up to three biomarkers on FFPE tissues.
• The UltraPlex™ mxIHC technology simplifies multiplex IHC protocols.
• Both manual and automated protocols demonstrated efficacy.
• Compatibility with primary antibodies from any species was achieved.

Conclusions:

• The UltraPlex™ mxIHC technology provides a robust and simplified method for multiplex chromogenic IHC.
• This advancement facilitates contextual biomarker analysis for improved diagnostic and research applications.
• The technology overcomes previous limitations in simultaneous multiplex IHC staining.