Protocol for multiplex fluorescent immunohistochemistry in free-floating rodent brain tissues

Area of Science:

• Neuroscience
• Biochemistry
• Cell Biology

Background:

• Assessing protein colocalization in tissues is crucial for understanding cellular mechanisms.
• Traditional slide-mounted immunohistochemistry can lead to significant tissue loss and limited antibody penetration.
• Multiplex protein identification offers cost-effectiveness and enhanced experimental efficiency.

Purpose of the Study:

• To describe a novel protocol for multiplex immunolabeling of proteins in free-floating rodent brain sections.
• To offer an improved method over slide-mounted immunohistochemistry for protein visualization.
• To enable the simultaneous detection of three or more proteins within tissue samples.

Main Methods:

• Development of a free-floating immunohistochemistry protocol for rodent brain sections.
• Utilizing distinct fluorophores for the simultaneous labeling of multiple proteins.
• Optimization for enhanced antibody penetration and reduced tissue loss.

Main Results:

• The free-floating approach minimizes tissue loss during the immunolabeling process.
• Greater antibody penetration was achieved compared to slide-mounted techniques.
• Successful visualization of three or more proteins within the same tissue section was demonstrated.

Conclusions:

• The described free-floating multiplex immunolabeling protocol is an efficient method for protein colocalization studies.
• This technique offers advantages in tissue preservation and antibody accessibility.
• The protocol is adaptable for application to various tissue types beyond rodent brain sections.