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Updated: Sep 26, 2025
Visualizing Bacteria in Nematodes using Fluorescent Microscopy
Published on: October 19, 2012
Stable transformation of fluorescent proteins into Nosema bombycis by electroporation
Zhanqi Dong1,2, Na Gao1, Boyuan Deng1
1State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China.
Background:
Microsporidia are a group of intracellular parasitic eukaryotes, serious pathogens that cause widespread infection in humans, vertebrates, and invertebrates. Because microsporidia have a thick spore wall structure, the in vitro transformation, cell culture, and genetic operation technology of microsporidia are far behind that of other parasites.
Methods:
In this study, according to an analysis of the life-cycle of microsporidia, Nosema bombycis, and different electro-transformation conditions, the transduction efficiency of introducing foreign genes into N. bombycis was systematically determined.
Results:
We analyzed the direct electro-transformation of foreign genes into germinating N. bombycis using reporters under the regulation of different characteristic promoters. Furthermore, we systematically determined the efficiency of electro-transformation into N. bombycis under different electro-transformation conditions and different developmental stages through an analysis of the whole life-cycle of N. bombycis. These results revealed that foreign genes could be effectively introduced through a perforation voltage of 100 V pulsed for 15 ms during the period of N. bombycis sporeplasm proliferation.
Conclusions:
We present an effective method for electro-transformation of a plasmid encoding a fluorescent protein into N. bombycis, which provides new insight for establishing genetic modifications and potential applications in these intracellular parasites.
Insights
Researchers developed an effective electro-transformation method for introducing foreign genes into Nosema bombycis (N. bombycis). This breakthrough facilitates genetic modification in these challenging intracellular parasites.
Area of Science:
- Parasitology
- Molecular Biology
- Genetics
Background:
- Microsporidia are eukaryotic intracellular parasites causing infections in humans and animals.
- Their thick spore walls hinder in vitro transformation and genetic manipulation technologies.
Purpose of the Study:
- To systematically determine the efficiency of introducing foreign genes into Nosema bombycis (N. bombycis).
- To optimize electro-transformation conditions for N. bombycis.
Main Methods:
- Analysis of the N. bombycis life-cycle.
- Systematic determination of electro-transformation efficiency under varying conditions.
- Utilizing reporter genes under different promoters.
Main Results:
- Foreign genes can be effectively introduced into N. bombycis via electro-transformation.
- Optimal conditions identified: 100 V for 15 ms during sporeplasm proliferation.
- Successful transformation demonstrated using a fluorescent protein plasmid.
Conclusions:
- An effective electro-transformation method for N. bombycis was established.
- This provides a foundation for genetic modification of microsporidia.
- Opens potential applications for these intracellular parasites.
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