Shrimp Sperm Cryopreservation via Partial Homogenization
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Solution Overview
Problem
Current cryopreservation protocols for shrimp spermatophores and sperm mass often result in the loss of original physical properties and fertilizing capacity, as they require complete disintegration and homogenization of samples for effective preservation, which is not suitable for maintaining intact viability and morphology.
Innovation Solution
A protocol involving an initial extender solution with specific concentrations of NaCl, KCl, H3BO3, MgSO4, and antibiotics, followed by Trehalose treatment and partial submersion in a cryoprotectant solution containing DMSO, allowing for cryopreservation without complete disintegration, thereby preserving the original physical and fertilizing properties of shrimp sperm samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complete disintegration and homogenization of samples is performed for cryopreservation, then effective preservation is achieved, but original physical properties and fertilizing capacity are lost
Solution Approach 1:
The patent applies partial action by performing only the necessary degree of homogenization to enable cryoprotectant penetration, rather than complete disintegration. The sperm packet is partially homogenized to achieve adequate mixing with cryoprotectants while deliberately maintaining the integrity of the sperm packet structure, thus preserving original physical properties and fertilizing capacity.
2Ease of operation
If complete disintegration of samples is performed, then cryoprotectant contact is improved, but sperm packet integrity is lost
Solution Approach 1:
The method performs partial homogenization - enough to ensure adequate contact between cryoprotectants and sperm cells, but not enough to destroy the sperm packet structure. This intermediate level of processing achieves the necessary cryoprotectant penetration while maintaining the structural integrity required for successful fertilization.
3Reliability
If DMSO is used as cryoprotectant agent, then cryopreservation is achieved, but osmotic balance requires additional compounds
Solution Approach 1:
The patent uses a composite cryoprotectant solution containing DMSO combined with other compounds that maintain osmotic balance. This composite approach leverages the cryoprotective properties of DMSO while supplementing it with additional substances that ensure proper osmotic conditions, achieving effective cryopreservation through material composition rather than procedural complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The protocol effectively maintains the viability and morphological integrity of shrimp sperm samples, enabling successful fertilization and preserving the original consistency of the samples, with treatment B (Trehalose 0.25-0.5 M and DMSO 10-15%) demonstrating 100% intact cell membrane and viability post-thawing.
Implementation Method 1
this is achieved through the addition of cryoprotectant substances that prevent crystal formation during the freezing process either from reducing the quantity of intracellular water and/or from altering their behavior by modifying the attractive forces between the water molecules, for example by breaking the hydrogen bonds
Implementation Method 2
modifying the attractive forces between the water molecules, for example by breaking the hydrogen bonds
Implementation Method 3
A protocol involving an initial extender solution with specific concentrations of NaCl, KCl, H3BO3, MgSO4, and antibiotics, followed by Trehalose treatment and partial submersion in a cryoprotectant solution containing DMSO
Implementation Method 4
The protocol effectively maintains the viability and morphological integrity of shrimp sperm samples, enabling successful fertilization and preserving the original consistency of the samples
Data Source
Figure 1
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Figure 3a~3b
AI summary
A protocol for the cryopreservation of high viscosity biological samples, preferably of spermatic samples of crustaceans or insects, that enables maintaining intact the physical properties of the original sample preserving the viability of the sperm packet.