Microinjection Pressure Control
Microinjection Pressure Control - Related Videos
08:12
Zebrafish Microinjection Techniques
0 Views •
2023
One of the major advantages to working with zebrafish (Danio rerio) is that their genetics can be easily manipulated by microinjection of early stage embryos. Using this technique, solutions containing genetic material or knockdown constructs are delivered into the blastomeres: the embryonic cells sitting atop the yolk of the newly fertilized egg. Delivery into the cytoplasm is achieved either through direct injection into the blastomere, or via natural cytoplasmic movements that occur after a...
07:42
Activation of Apoptosis by Cytoplasmic Microinjection of Cytochrome c
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Cited by 15 •
2011
In this protocol, we describe the direct cytoplasmic microinjection of cytochrome c protein into fibroblasts and primary sympathetic neurons. This technique allows for the introduction of cytochrome c protein into the cytoplasm of cells and mimics the release of cytochrome c from mitochondria, which occurs during apoptosis.
07:55
Pressure Controlled Ventilation to Induce Acute Lung Injury in Mice
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Cited by 7 •
2011
A murine model for ventilator induced lung injury is an important tool to study an acute lung injury in vivo. Here, we report an easy applicable in situ model for acute lung injury using high-pressure mechanical ventilation to induce acute failure of the lung.
07:26
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Cited by 5 •
2013
The laser heated diamond anvil cell combined with synchrotron micro-diffraction techniques allows researchers to explore the nature and properties of new phases of matter at extreme pressure and temperature (PT) conditions. Heterogeneous samples can be characterized in situ under high pressure by 2D mapping and combined powder, single-crystal and multigrain diffraction approaches.
12:09
Generation of Stable Transgenic C. elegans Using Microinjection
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Cited by 92 •
2008
This video demonstrates the technique of microinjection into the gonad of C. elegans to create transgenic animals.
FAQs
These variables jointly control how quickly material moves through the fine glass micropipette and how much enters the specimen. Higher driving pressure can promote flow, while resistance opposes movement; injection duration extends the period of delivery. Adjusting the three parameters together allows researchers to target consistent transfer rather than relying on pressure alone.
Pressure that is poorly matched to the injection conditions can contribute to cellular damage or inconsistent transfer. Careful regulation helps limit physical stress during delivery, reduce the likelihood of clogging, and support specimen survival. These effects matter because damaged or variably treated specimens can make later biological responses more difficult to interpret.
Both compressed-air systems and electronic pressure controllers provide the driving force that moves fluid through the micropipette. Their role is to make injection pressure adjustable during delivery, so researchers can coordinate pressure with the selected injection duration and the resistance encountered by the fluid. This control supports more reproducible manipulation of biological specimens.
Consistent pressure conditions help produce more consistent material transfer between specimens. This improves experimental accuracy and reduces variation caused by differences in delivery rather than by genuine biological effects. As a result, researchers can interpret changes in development, gene function, or cellular responses with greater confidence when comparing injected samples.
A pressure source, such as compressed air or an electronic controller, is coordinated with a fine glass micropipette containing the material for injection. Researchers regulate injection pressure and duration while accounting for fluid resistance. Together, these components determine delivery behavior and help reduce clogging, specimen damage, and variation in the transferred volume.
Controlled delivery can be used for DNA, RNA, proteins, drugs, or cytoplasmic material. The pressure and timing must be managed so that the selected material enters the specimen in a controlled and reproducible manner. Supporting consistent transfer is especially important when the experiment examines how a specific introduced material changes cellular activity or development.
The approach is particularly useful in developmental biology, transgenesis, gene-function studies, and cell manipulation. In these settings, consistent delivery can support specimen survival and improve the accuracy of experimental comparisons. It also helps researchers connect an introduced DNA, RNA, protein, drug, or cytoplasmic material with subsequent developmental or cellular responses.