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A BODIPY-Hoechst conjugate for nuclear DNA staining.

Amit Kumar Singh¹, Andrea Tomassini¹, Giulio Palummieri²

¹The Patricia and Philip Frost Institute for Chemistry and Molecular Science, University of Miami, 1201 Memorial Drive, Coral Gables, FL 33146-2509, USA.

Journal of Porphyrins and Phthalocyanines

|February 20, 2026

Summary

Researchers developed a new fluorescent dye by combining BODIPY and Hoechst components. This novel compound stains cell nuclei effectively using green light, overcoming limitations of traditional Hoechst dyes for imaging applications.

Keywords:

BODIPY dyes DNA Hoechst dyes cell imaging fluorescence nuclear stains

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Published on: June 24, 2020

Area of Science:

Molecular biology
Biochemistry
Fluorescence microscopy

Background:

Hoechst dyes are widely used for nuclear staining in fluorescence imaging and flow cytometry due to their DNA-binding properties and fluorescence enhancement.
However, the short excitation wavelengths required for Hoechst dyes can lead to cellular autofluorescence and photodamage, limiting their utility.
There is a need for novel DNA-binding dyes that can be excited at longer wavelengths to mitigate these issues.

Purpose of the Study:

To synthesize a novel molecular construct integrating a borondipyrromethene (BODIPY) chromophore and a Hoechst ligand.
To evaluate the photophysical properties and DNA-binding capabilities of the resulting BODIPY-Hoechst conjugate.
To demonstrate the utility of this conjugate for cell nucleus imaging using green light excitation.

Main Methods:

Chemical synthesis of the BODIPY-Hoechst conjugate.
Spectroscopic analysis to determine photophysical properties.
Confocal fluorescence microscopy to assess DNA binding and imaging performance in cells.

Main Results:

Successful synthesis of the BODIPY-Hoechst conjugate with preserved photophysical properties and DNA-binding affinity.
The conjugate effectively stains the cell nucleus, demonstrating specific binding to nuclear DNA.
Imaging of cell nuclei was achieved using green light excitation, characteristic of the BODIPY chromophore, with intense fluorescence detection.

Conclusions:

The developed BODIPY-Hoechst conjugate offers a promising alternative to traditional Hoechst dyes for nuclear staining.
Its ability to be excited by green light overcomes the limitations of autofluorescence and photodamage associated with short-wavelength excitation.
This novel dye enables efficient and robust cell nucleus imaging in various fluorescence applications.