Fluorescence lifetime imaging reveals heterogeneous functional distribution of eGFP expressed in Xenopus oocytes
| Autor: | Mikhail Y. Berezin, Leland C. Sudlow, Kiana Shahverdi, Dorota Grabowska, Samuel Achilefu, Steven L. Zeng |
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| Rok vydání: | 2019 |
| Předmět: |
Fluorescence-lifetime imaging microscopy
Time Factors Polarity in embryogenesis Green Fluorescent Proteins Xenopus 02 engineering and technology 010402 general chemistry 01 natural sciences Article Green fluorescent protein Xenopus laevis Microscopy medicine Animals General Materials Science Instrumentation Spectroscopy Polarity (international relations) biology Chemistry Optical Imaging 021001 nanoscience & nanotechnology biology.organism_classification Oocyte Fluorescence Atomic and Molecular Physics and Optics 0104 chemical sciences medicine.anatomical_structure Biophysics Oocytes 0210 nano-technology |
| Zdroj: | Methods Appl Fluoresc |
| ISSN: | 2050-6120 |
| Popis: | The oocytes from Xenopus laevis are well known for their polarity, presenting a distinct animal and vegetal pole. Other heterogeneities are less known. To study the heterogeneity of the Xenopus oocyte, we expressed eGFP and analyzed the protein distribution with fluorescence lifetime microscopy. The vegetal pole exhibited higher levels of fluorescence, than the animal pole. However, the fluorescence lifetimes between the two areas were indistinguishable, suggesting similar environments. In contrast, we observed a substantial and gradual decrease in the fluorescence lifetime from 2.9 ns to 2.6 ns as slices approached the periphery. This has an important implication for future oocyte studies as it demonstrates the environment inside the oocyte is not uniform and might affect the fluorescence intensity. As a result, it cannot be assumed that the observed fluorescence intensity reflects the expression of the proteins but might reflect the environment within the oocyte. |
| Databáze: | OpenAIRE |
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