Optimized protocol for high-vacuum scanning electron microscopy analysis of polyacrylamide hydrogel-attached sperm...

Area of Science:

• Biotechnology
• Materials Science
• Reproductive Biology

Background:

• Understanding cell-material interactions is crucial in fields like reproductive biology and tissue engineering.
• Traditional methods for preparing hydrogel-cell samples for electron microscopy can introduce artifacts.
• High-vacuum scanning electron microscopy (SEM) offers high-resolution imaging but requires optimized sample preparation.

Purpose of the Study:

• To develop and present a novel protocol for analyzing polyacrylamide hydrogel-attached sperm cells using high-vacuum SEM.
• To optimize SEM procedures for accurate and detailed imaging of sperm-hydrogel interactions.
• To provide an alternative dehydration method that avoids potential chemical alterations.

Main Methods:

• A stepwise sample preparation protocol was established for sperm cells on polyacrylamide hydrogels.
• Dehydration was achieved through a gradual exchange of ethanol/water ratios, avoiding acetone.
• Samples were subsequently coated with a conductive metal for SEM imaging.

Main Results:

• The protocol successfully produced accurate and detailed images of sperm cells attached to the hydrogel scaffold.
• The ethanol/water dehydration method preserved the morphology and interactions within the binary system.
• The SEM imaging revealed precise details of sperm-hydrogel attachment.

Conclusions:

• The developed SEM protocol enables comprehensive evaluation of sperm-hydrogel morphology and interactions.
• This method provides a valuable tool for studying cell-material interfaces in reproductive biology.
• The protocol's applicability can be extended to other mammalian reproductive cells or cells of different origins on hydrogel scaffolds.