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Microinjection into crane-fly spermatocytes
B B Czaban1, A Forer, D A Wise
1York University, Department of Biology, North York, Ont., Canada.
Abstract:
We were successful in microinjecting fluorescently labelled material into crane-fly spermatocytes. In our experiments, we obtained four results. (i) In most attempts, the membrane stretched around the micropipette and prevented entry of fluorescent material, even when the micropipette appeared to be pushed completely through the cell. This confirms suppositions from earlier micromanipulation experiments that the elastic membrane prevents the micropipette needle from entering the cell. (ii) In some attempts, cells lysed upon contact with the micropipette. (iii) In other attempts, we successfully injected fluorescent material into cells. (iv) Fluorescent material left the cells after injection, often passing into adjacent cells. Although our success rate is low, microinjection into crane-fly spermatocytes is indeed possible.
Insights
Microinjection into crane-fly spermatocytes is possible, though challenging. The elastic cell membrane often prevents material entry, and some cells lyse upon contact.
Area of Science:
- Cell Biology
- Developmental Biology
- Entomology
Background:
- Crane-fly spermatocytes present unique challenges for cellular manipulation.
- Previous micromanipulation studies suggested membrane elasticity impedes microinjection.
Purpose of the Study:
- To investigate the feasibility of microinjecting fluorescently labeled material into crane-fly spermatocytes.
- To identify challenges and success factors in this microinjection process.
Main Methods:
- Microinjection of fluorescently labeled material into crane-fly spermatocytes.
- Observation of cell membrane response to micropipette insertion.
- Assessment of material entry, cell viability, and transfer between cells.
Main Results:
- Successful microinjection was achieved in some attempts.
- The elastic spermatocyte membrane frequently prevented material entry.
- Cell lysis occurred in a subset of microinjection attempts.
- Injected fluorescent material was observed to exit cells and transfer to adjacent cells.
Conclusions:
- Microinjection into crane-fly spermatocytes is achievable despite significant technical hurdles.
- Cell membrane elasticity and cell lysis are primary challenges.
- Further optimization is needed to improve success rates and understand material translocation.