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Fluorescence-based CdTe nanosensor for sensitive detection of cytochrome C.
Rehab M Amin1, Souad A Elfeky2, Thomas Verwanger3
1National Institute of Laser Enhanced Sciences, Ca iro University, Giza 12613, Egypt; Egypt Nanotechnology Center, Cairo University, El-Sheikh Zayed 12588, Egypt.
Biosensors & Bioelectronics
|July 16, 2017
Summary
Researchers developed a new cadmium telluride quantum dot sensor for detecting cytochrome c (Cyt c) in living cells. This fluorescence-based nanosensor shows promise for real-time cellular analysis.
Area of Science:
- Biomarker Detection
- Nanotechnology
- Cellular Biology
Background:
- Cytochrome c (Cyt c) is a crucial biomarker for cellular respiration, energy levels, and apoptosis.
- Accurate and real-time detection of Cyt c in living cells is essential for understanding cellular processes.
Purpose of the Study:
- To develop and validate a simple colorimetric sensor for the real-time detection of Cyt c in living cells.
- To utilize thioglycolic acid-capped cadmium telluride quantum dots (TGA/CdTe QDs) as a fluorometric nanosensor for Cyt c.
Main Methods:
- Synthesis and characterization of TGA/CdTe QDs using FTIR, TEM, and spectrophotometry.
- Investigation of the TGA/CdTe QDs sensor's applicability for fluorometric detection of Cyt c.
- Application of the nanosensor on primary human dermal fibroblasts for in-cell visualization.
Main Results:
- TGA/CdTe QDs demonstrated sensitivity in quantifying Cyt c concentrations from 0.5 to 2.5 μM.
- A inverse correlation between Cyt c concentration and QD fluorescence was observed, enabling standard curve establishment.
- The nanosensor was successfully internalized by cells and visualized via fluorescence microscopy.
Conclusions:
- TGA/CdTe QDs serve as a sensitive fluorescence probe for Cyt c quantification.
- The developed nanosensor is applicable for in-cell visualization and detection of Cyt c.
- Factors like cell damage and QD aggregation can influence intracellular Cyt c quantification.
