Related Experiment Video
Updated: Apr 12, 2026
Immunohistochemistry Techniques to Analyze Cellular Proliferation and Neurogenesis in Rats Using the Thymidine Analog BrdU
Published on: September 9, 2020
A novel multicolor immunostaining method using ethynyl deoxyuridine for analysis of in situ immunoproliferative
Yusuke Kitazawa1, Hisashi Ueta, Thomas Hünig
1Department of Anatomy (Macro), Dokkyo Medical University, 880 Kitakobayashi, Mibu, Tochigi, 321-0293, Japan.
Insights
Researchers developed a novel multicolor immunofluorescence staining method using 5-ethynyl-2'-deoxyuridine (EdU) for in situ analysis of immunoproliferation. This technique allows detailed study of immune cell responses within lymphoid tissues.
Area of Science:
- Immunology
- Cell Biology
- Biochemistry
Background:
- In situ analysis of immune responses, including antigen presentation and lymphocyte proliferation (immunoproliferation), is challenging.
- Existing methods like 5-bromo-2 -deoxyuridine staining have limitations in multicolor capabilities.
Purpose of the Study:
- To develop a new method for simultaneous multicolor immunofluorescence staining for in situ analysis of immunoproliferation.
- To overcome the limitations of standard methods for studying immune cell dynamics in tissues.
Main Methods:
- Utilized 5-ethynyl-2 -deoxyuridine (EdU), a thymidine analogue, with click chemistry for simultaneous multicolor immunofluorescence staining.
- Applied the method to immunohistology and flow cytometry, enabling detection of multiple markers on single cells.
- Validated the technique in rat models to analyze immune cell phenotypes, antigen expression, and transcription factors.
Main Results:
- Achieved simultaneous staining of at least four colors, including surface markers, histocompatibility complex antigens, and nuclear transcription factors.
- Successfully identified and characterized various immune cells and their functional states in situ.
- Enabled sorting of proliferating cells for subsequent RT-PCR analysis.
Conclusions:
- The developed EdU-based staining method significantly advances in situ analysis of immunoproliferative responses.
- This technique allows for detailed, time-kinetic functional analysis of immune cell populations within specific lymphoid organ domains.
- Provides quantitative confirmation of immune cell dynamics through flow cytometry integration.
Abstract:
Immune responses are generally accompanied by antigen presentation and proliferation and differentiation of antigen-specific lymphocytes (immunoproliferation), but analysis of these events in situ on tissue sections is very difficult. We have developed a new method of simultaneous multicolor immunofluorescence staining for immunohistology and flow cytometry using a thymidine analogue, 5-ethynyl-2'-deoxyuridine (EdU). Because of the small size of azide dye using click chemistry and elimination of DNA denaturation steps, EdU staining allowed for immunofluorescence staining of at least four colors including two different markers on a single-cell surface, which is impossible with the standard 5-bromo-2'-deoxyuridine method. By using two rat models, successfully detected parameters were the cluster of differentiation antigens including phenotypic and functional markers of various immune cells, histocompatibility complex antigens, and even some nuclear transcription factors. Proliferating cells could be further sorted and used for RT-PCR analysis. This method thus enables functional in situ time-kinetic analysis of immunoproliferative responses in a distinct domain of the lymphoid organs, which are quantitatively confirmed by flow cytometry.
