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5-Formyluracil as a Multifunctional Building Block in Biosensor Designs.

Chaoxing Liu1, Guangrong Zou1, Shuang Peng1

  • 1College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of, Ministry of Education, The Institute for Advanced Studies, Hubei Province Key Laboratory of Allergy and Immunology, Wuhan University, Wuhan, Hubei, 430072, P. R. China.

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Summary

This study presents 5-formyluracil (5fU) as a versatile building block for creating novel biosensors. Modified 5fU probes enable selective imaging of mitochondria and sensitive detection of 5fU in biological samples.

Keywords:
aggregation-induced emissionbuilding blockscell imagingfluorescent probesnucleobases

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Chemical Biology

Background:

  • 5-formyluracil (5fU) is a vital natural nucleobase found in organisms.
  • Existing biosensor designs often lack biocompatibility or ease of use, especially those based on natural nucleobase modifications.
  • There is a need for novel probe designs utilizing natural nucleobases for selective bio-imaging and detection.

Purpose of the Study:

  • To establish 5-formyluracil (5fU) as a multifunctional building block for biosensor development.
  • To synthesize 5fU analogues with aggregation-induced emission properties for bio-imaging.
  • To demonstrate the utility of 5fU-based probes for selective mitochondria imaging and 5fU detection.

Main Methods:

  • Synthesis of 5fU analogues incorporating an azide group for click chemistry and an aldehyde group for environmental sensitivity.
  • Modification of 5fU analogues with a triphenylphosphonium group for mitochondria targeting.
  • Utilizing aggregation-induced emission properties for fluorogenic switch-on detection.
  • Application of click chemistry for selective binding to cells or organelles.

Main Results:

  • Successfully synthesized 5fU analogues with aggregation-induced emission properties.
  • Achieved selective mitochondria imaging in cancer cells and mouse embryonic stem cells using triphenylphosphonium-targeted 5fU probes.
  • Demonstrated high selectivity of the developed reagents for 5fU, enabling its detection.
  • Showcased the potential for environmentally sensitive nucleobases derived from 5fU's aldehyde group.

Conclusions:

  • 5-formyluracil (5fU) serves as a multifunctional building block for designing advanced biosensors.
  • The developed 5fU-based probes offer biocompatibility, ease of operation, and selective targeting capabilities.
  • This approach holds promise for site-specific microenvironment detection and sensitive bio-analysis in future research.