Worm Sample Preparation
Worm Sample Preparation - Related Videos
10:44
An Introduction to Worm Lab: from Culturing Worms to Mutagenesis
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Cited by 27 •
2011
Screening for mutants with phenotypic defects is a straightforward method for identifying genes that function in a given biological process. In this article we describe how to culture free living worms (e.g., Pristionchus pacificus) in the laboratory and show two different mutagenesis methods, EMS and TMP/UV.
03:01
Sample Preparation for Metabolomics: A Method to Prepare Cell Samples for Metabolite Profiling
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2023
This video describes a technique of preparing breast cancer cell samples for metabolite profiling. Breast cancer cells are treated with estradiol, which binds to the estrogen receptor alpha and causes change in the metabolite...
01:36
Worms as an Alternative Model Organism
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2026
All animal procedures described here must be conducted in accordance with institutional animal ethics guidelines and approved by IACUC. All procedures must follow the principles of the 3Rs—Replacement, Reduction, and Refinement—and must be performed by trained personnel. Introduction to C. elegans The nematode (roundworm) Caenorhabditis elegans, commonly known as C. elegans, is a widely used non-vertebrate animal model for studying fundamental biological processes. Because many cellular and...
09:51
Sample Preparation for Analytical Characterization
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Sample preparation is the way in which a sample is treated to prepare for analysis. Careful sample preparation is critical in analytical chemistry to accurately generate either a standard or unknown sample for a chemical measurement. Errors in analytical chemistry methods are categorized as random or systematic. Random errors are errors due to change and are often due to noise in instrument. Systematic errors are due to...
04:19
Selective Cleaning of Caenorhabditis Worms for Enrichment of Intestinal Microbiota
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2026
Source: Morgan, E., et al. Selective Cleaning of Wild Caenorhabditis Nematodes to Enrich for Intestinal Microbiome Bacteria. J. Vis. Exp. (2021)This video demonstrates a protocol for isolating intestinal bacteria of interest from wild Caenorhabditis worms. The worms are first starved and washed to eliminate residual feeding bacteria from their surface and intestinal lumen while preserving the target microbes. After surface cleaning and multiple crawling steps, the worms are dissected to extract...
FAQs
Repeated washing removes growth medium and other contaminants that could alter biochemical measurements or interfere with downstream assays. This cleanup step also makes samples more comparable by reducing differences caused by material carried over from the culture environment. Researchers therefore obtain a cleaner worm fraction before concentration and disruption, improving consistency across experimental conditions.
The lysis buffer provides the chemical environment during mechanical disruption and helps preserve the class of molecules being studied, including proteins, nucleic acids, or metabolites. Because different assays depend on maintaining different biological components, buffer composition must match the intended measurement. An appropriate buffer supports reliable lysate quality and downstream analysis.
Centrifugation first concentrates the worms after washing, making the collected biological material more manageable for homogenization. After lysis, clarification separates soluble components from insoluble debris. This distinction matters because assays such as protein measurements, enzyme activity tests, Western blotting, and mass spectrometry may require access to the soluble fraction rather than an unprocessed mixture.
A typical workflow begins by collecting the worms and repeatedly washing them to remove growth medium and contaminants. Centrifugation then concentrates the cleaned material, which is mechanically homogenized in a suitable lysis buffer. The lysate may subsequently be clarified to remove debris before it is used for biochemical assays or molecular measurements.
Careful control of handling, temperature, and buffer composition strongly influences the consistency of the resulting lysate. Variations in these factors can change how well biological material is preserved or disrupted, making comparisons between samples less reliable. Standardizing them across experimental groups helps researchers distinguish genuine biological differences from preparation-related variation.
Prepared lysates can support protein quantification, Western blotting, enzyme activity measurements, and mass spectrometry. These analyses allow researchers to compare molecular pathways, physiological states, and responses to experimental conditions. In biochemistry, the preparation step is therefore important not only for obtaining material, but also for producing samples suitable for consistent molecular comparison.