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A Rapid and Chemical-free Hemoglobin Assay with Photothermal Angular Light Scattering
Published on: December 7, 2016
Methemoglobin-Based Biological Dose Assessment for Human Blood
Xiao-Hong Zhang1, Xiao-Dan Hu, Su-Ying Zhao
1*Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210006, P.R. China; †Clincal Laboratory, Jiangsu Province Hospital of Traditional Chinese Medicine, Nanjing, Jiangsu 210029, P.R. China; ‡Division of Radiation Medicine, Department of Naval Medicine, Second Military Medical University, Shanghai 200433, P.R. China; §Jiangsu Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210018, P.R. China.
This study developed a new biological dosimeter using methemoglobin (MetHb) assays to measure absorbed gamma radiation doses in human blood. MetHb levels increased with dose, showing potential for rapid and accurate radiation exposure assessment.
Area of Science:
- Biomedical Science
- Radiation Biology
- Analytical Chemistry
Background:
- Methemoglobin (MetHb) is an oxidized form of hemoglobin.
- Accurate biological dosimetry is crucial for assessing radiation exposure.
- Existing methods may have limitations in speed or accuracy.
Purpose of the Study:
- To develop and validate a novel biological dosimeter utilizing a methemoglobin assay.
- To quantify methemoglobin levels in response to gamma radiation exposure.
- To establish dose-response relationships for methemoglobin in human blood.
Main Methods:
- Peripheral blood samples from males and females were exposed to a Cobalt-60 gamma source.
- Methemoglobin levels were quantified using an enzyme-linked immunosorbent assay (ELISA).
- Time-course experiments were conducted to assess MetHb changes post-irradiation.
Main Results:
- Methemoglobin levels increased with increasing gamma radiation dose in both sexes.
- Female blood samples showed significantly higher MetHb levels than male samples at doses above 4 Gy.
- A lower limit of dose assessment of approximately 1 Gy was determined.
- Radiation-induced MetHb upregulation persisted for approximately 3 days.
Conclusions:
- Methemoglobin assay is a promising tool for rapid and accurate biological dosimetry.
- This method allows for early assessment of absorbed gamma doses in human blood.
- The developed assay demonstrates reliable dose-response relationships for radiation exposure.
