Archival Tissue Processing
Archival Tissue Processing - Related Videos
01:40
Archival Research
0 Views •
2020
Some researchers gain access to large amounts of data without interacting with a single research participant. Instead, they use existing records to answer various research questions. This type of research approach is known as archival research. Archival research relies on looking at past records or data sets to look for interesting patterns or relationships. For example, a researcher might access the academic records of all individuals who enrolled in college within the past ten years and...
15:52
Postproduction Processing of Electrospun Fibres for Tissue Engineering
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Cited by 30 •
2012
Electrospun scaffolds can be processed post production for tissue engineering applications. Here we describe methods for spinning complex scaffolds (by consecutive spinning), for making thicker scaffolds (by multi-layering using heat or vapour annealing), for achieving sterility (aseptic production or sterilisation post production) and for achieving appropriate biomechanical properties.
13:08
Processing of Human Reduction Mammoplasty and Mastectomy Tissues for Cell Culture
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Cited by 80 •
2013
A method to process human mammary surgical discard material is described. Processed tissue, in the form of organoids, can be stored frozen indefinitely or placed in culture for long-term growth. This method enables experimental examination of normal human epithelial cell biology, and the effects of exogenous perturbations.
07:43
Four-color Fluorescence Immunohistochemistry of T-cell Subpopulations in Archival Formalin-fixed, Paraffin-embedded Human Oropharyngeal Squamous Cell Carcinoma Samples
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Cited by 1 •
2017
Multiparameter fluorescence immunohistochemistry can be used to assess the number, relative distribution, and localization of immune cell populations in the tumor microenvironment. This manuscript describes the use of this technique to analyze T-cell subpopulations in oropharyngeal cancer.
02:41
Cryopreserved Tissue Section Fixation and Staining: A Procedure to Process Frozen Brain Tissue Sections for Laser Microdissection
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2023
This video presents the fixation and staining method to process frozen mouse brain tumor tissue. The processed tissue helps differentiate and obtain a specific population of cells during subsequent laser capture microdissection.
FAQs
Graded alcohols provide a staged dehydration sequence before clearing and paraffin embedding. Moving through alcohol concentrations prepares the fixed tissue for the next processing conditions rather than changing it abruptly. This step is important because the quality of later embedding and sectioning depends on how well the preserved specimen progresses through the workflow.
The clearing step connects alcohol-based dehydration with paraffin embedding by using an intermediate solvent. Its position in the sequence allows the prepared tissue to proceed from graded alcohols into the paraffin medium. In archival work, this transition helps convert an older fixed specimen into a block that can be sectioned and examined again.
Stored paraffin blocks can be retrieved and reprocessed when researchers need additional examination of an archived specimen. This makes it possible to return to valuable material instead of relying only on newly collected samples. Reprocessing supports renewed microscopic, histological, or molecular analysis while conserving specimens from past collections.
After embedding, the paraffin block is sectioned into thin slices so that tissue architecture can be examined. The sections may then be stained or otherwise labeled, depending on the intended analysis. This sequence converts a preserved block into a form suitable for microscopy, histological assessment, or detection of selected molecular features.
Staining and other labeling approaches determine which features become visible or measurable in the tissue sections. They can support examination of tissue structure and biomarker expression, while different labeling choices connect the same archived material with microscopic, immunohistochemical, or molecular analyses. The resulting signal helps investigators interpret preserved biological information.
It is useful when researchers want to investigate disease progression, tissue structure, treatment response, or biomarker expression using specimens collected in the past. By revisiting historical material, studies can compare earlier samples with later findings and extract additional information without discarding valuable collections. This makes archived specimens relevant to both biological history and current research questions.
Archival tissue processing links older specimens to contemporary imaging, immunohistochemistry, and molecular biology methods. A preserved sample can therefore provide more than its original record, because renewed sectioning and labeling may support updated forms of analysis. In biology, this connection helps researchers combine historical specimens with modern approaches to tissue characterization and biomarker investigation.