Phenotype Determination
Phenotype Determination - Related Videos
14:10
Protocol for Plasmodium falciparum Infections in Mosquitoes and Infection Phenotype Determination
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Cited by 9 •
2007
Once a gene is identified as potentially refractory for malaria, it must be evaluated for its role in preventing Plasmodium infections within the mosquito. This protocol illustrates how the extent of plasmodium infections of mosquitoes can be assayed. The techniques for preparing the gametocyte culture, membrane feeding mosquitoes human blood, and assaying viral titers in the mosquito midgut are demonstrated.
15:25
Protocol for Dengue Infections in Mosquitoes (A. aegypti) and Infection Phenotype Determination
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Cited by 35 •
2007
Once a gene is identified as potentially refractory for the dengue virus, it must be evaluated for it's role in preventing viral infections within the mosquito. This protocol illustrates how the extent of dengue infections of mosquitoes can be assayed. The techniques for growing up the virus in culture, membrane feeding mosquitoes human blood, and assaying viral titers in the mosquito midgut are demonstrated.
08:37
In Situ MHC-tetramer Staining and Quantitative Analysis to Determine the Location, Abundance, and Phenotype of Antigen-specific CD8 T Cells in Tissues
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Cited by 11 •
2017
Here, we describe a method that combines in situ MHC-tetramer staining with immunohistochemistry to determine localization, phenotype, and quantity of antigen-specific T cells in tissues. This protocol is used to determine the spatial and phenotypic characteristics of antigen-specific CD8 T cells relative to other cell type and structures in tissues.
06:28
High Throughput Image-Based Phenotyping for Determining Morphological and Physiological Responses to Single and Combined Stresses in Potato
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Cited by 16 •
2024
We designed an image-based phenotyping protocol to determine the morphological and physiological responses to single and combined heat, drought, and waterlogging treatments. This approach enabled the identification of early, late, and recovery responses at a whole plant level, particularly above-ground parts, and highlighted the necessity of using multiple imaging sensors.
12:43
On-Chip Endothelial Inflammatory Phenotyping
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Cited by 3 •
2012
Microfluidic flow chambers etched by photolithography and fabricated from PDMS are applied to probe functional outcomes associated with EC dysfunction and inflammation. In a representative experiment, the ability of differential shear stress to modulate monocytic cell adhesion to cytokine activated EC monolayers is demonstrated.
FAQs
These features provide different layers of evidence about a biological state. Cell-surface markers help distinguish cellular subsets, protein expression reflects molecular activity, morphology reveals structural changes, and functional responses show how cells behave. Combining them reduces reliance on a single characteristic and supports more informative classification of immune cells or pathogen-associated changes.
Phenotypic observations show what characteristics or responses are present, whereas genotype provides information about underlying biological variation. Examining both can connect observable traits with their genetic basis and with disease outcome. This relationship can clarify mechanisms of pathogenesis and help investigators interpret why infections produce different cellular or molecular responses.
Infection can produce changes in host-cell markers, protein expression, morphology, or functional responses. Measuring these features allows investigators to distinguish altered immune states from baseline cellular patterns and to identify responses associated with pathogen exposure. Such comparisons help characterize host-pathogen interactions and reveal how infection shapes immune activity.
Immune-cell subsets may share broad cellular features but differ in marker patterns, protein expression, morphology, or functional behavior. Evaluating several characteristics together provides a stronger basis for separating these populations than relying on one feature alone. Flow cytometry, microscopy, and immunological assays can therefore support detailed classification of immune responses.
Investigators first select characteristics relevant to the biological question, such as surface markers, protein expression, morphology, or functional responses. They then measure those features with flow cytometry, microscopy, or immunological assays, classify the observed patterns, and relate the results to infection status, genotype, or disease outcome. Combining readouts strengthens interpretation.
The approach is useful when researchers need to characterize pathogen-associated changes, assess how infection modifies host responses, or distinguish biological states for diagnosis. It also supports evaluation of vaccines, antimicrobial treatments, and immunomodulatory treatments by showing how cellular or molecular phenotypes relate to treatment response and disease-related outcomes.