Snap Frozen Preparation
Snap Frozen Preparation - Related Videos
03:30
Snap Freezing of Muscle Tissue for Sectioning: A Protocol to Obtain Ultrathin Sections of Rapidly Frozen Murine Muscle Tissue
0 Views •
2023
This video describes the procedure for snap freezing muscle tissue and obtaining its thin sections. The technique can help study cancer-related cachexia in colon cancer mouse models.
08:04
Evaluating the Accuracy of Snap Judgments
0 Views •
2023
Source: Diego Reinero & Jay Van Bavel—New York University Social psychologists have long been interested in the way people form impressions of others. Much of this work has focused on the errors people make in judging others, such as the exaggerated influence of central traits (such as "warm" and "cold"), the insufficient weight given to the context in which others' behavior takes place, and the tendency for people to make judgments that conform to their initial expectations about another.
08:30
Isolate Cell-Type-Specific RNAs from Snap-Frozen Heterogeneous Tissue Samples without Cell Sorting
0 Views •
2021
This protocol aims to isolate cell-type-specific translating ribosomal mRNAs using the NuTRAP mouse model.
09:59
Preparation of Primary Neurons for Visualizing Neurites in a Frozen-hydrated State Using Cryo-Electron Tomography
0 Views •
Cited by 24 •
2014
To preserve neuronal processes for ultrastructural analysis, we describe a protocol for plating of primary neurons on electron microscopy grids followed by flash freezing, yielding samples suspended in a layer of vitreous ice. These samples can be examined with a cryo-electron microscope to visualize structures at the nanometer scale.
02:37
Frozen Mouse Brain Tissue Sectioning: A Procedure to Obtain Thin Frozen Tissue Sections from Frozen Murine Brain Tissue
0 Views •
2023
In this video, we demonstrate the sectioning of a frozen mouse brain tumor tissue using a cryostat. The frozen brain tissue sections so obtained are stored at low temperatures until further analysis.
FAQs
Immediate cooling sharply limits enzymatic activity after collection, reducing processes that can alter proteins and nucleic acids. Rapid freezing also aims to minimize ice-crystal formation, which can disrupt cellular structure. When these conditions are achieved, the resulting specimen retains molecular and structural features needed for histological evaluation, immunostaining, fluorescence-based analysis, and molecular testing.
Both approaches provide the very low temperatures needed to cool freshly collected tissue rapidly. The speed of cooling is important because it limits enzymatic activity and helps reduce damaging ice crystals. Choosing liquid nitrogen or a chilled embedding medium therefore supports preservation of tissue architecture and molecular features before the specimen undergoes sectioning or analysis.
Snap frozen tissue can preserve molecular features that may be compromised by chemical fixation or prolonged processing. This makes it particularly useful when investigators need access to proteins, nucleic acids, or fluorescence-related signals in addition to tissue structure. Chemical fixation remains a distinct processing approach, whereas rapid freezing supports time-sensitive examination and selected molecular analyses.
Fresh tissue is rapidly cooled immediately after collection, commonly with liquid nitrogen or a chilled embedding medium. The frozen specimen is then sectioned using a cryostat, an instrument designed to cut tissue at low temperature. Sections can proceed to intraoperative diagnosis, histological evaluation, immunostaining, fluorescence-based analysis, or molecular testing, depending on the medical question.
A cryostat enables thin sections to be produced while the tissue remains frozen. This preserves access to the prepared specimen for microscopic and molecular workflows without requiring the prolonged processing associated with other approaches. The sections can support intraoperative diagnosis, routine histological evaluation, immunostaining, and fluorescence-based analysis in pathology and biomedical research.
Its greatest value arises when clinicians or researchers need results from freshly collected tissue without waiting for prolonged processing. In pathology, frozen sections can support intraoperative diagnosis and time-sensitive clinical decisions. In biomedical research, the preserved proteins, nucleic acids, and other molecular features can support immunostaining, fluorescence-based studies, histology, and molecular testing.