Complement Receptor 1 Genotyping
Complement Receptor 1 Genotyping - Related Videos
07:26
High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment
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Cited by 9 •
2017
Here, we describe an innovative method to determine complement receptor 1 (CR1) length polymorphisms for use in several applications, particularly the assessment of susceptibility to diseases such as Alzheimer's disease (AD). This method could be useful to better understand the role of CR1 isoforms in the pathogenesis of AD.
07:20
Measuring Erythrocyte Complement Receptor 1 Using Flow Cytometry
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Cited by 3 •
2020
The aim of this method is to determine the CR1 density in the erythrocytes of any subject by comparing with three subjects whose erythrocyte CR1 density is known. The method uses flow cytometry after immunostaining of the subjects' erythrocytes by an anti-CR1 monoclonal antibody coupled to an amplified system using phycoerythrin (PE).
08:27
Mouse Genotyping
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2023
Even though the human genome was mapped over 10 years ago, scientists are still far from understanding the function of every human gene! One way to evaluate how a gene functions is to disrupt the sequence encoding it and then evaluate the impact of this change (the phenotype) on the animal’s biology. This approach is commonly used in the mouse (Mus musculus), since it shares a high degree of genetic similarity with humans. To track the animals bearing genetic changes over several generations,...
08:23
SNP Genotyping
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2023
Single nucleotide polymorphisms, or SNPs, are the most common form of genetic variation in humans. These differences at individual bases in the DNA often do not directly affect gene expression, but in many cases can still be useful for locating disease-associated genes or for diagnosing patients. Numerous methodologies have been established to identify, or “genotype”, SNPs.JoVE’s introduction to SNP Genotyping begins by discussing what SNPs are and how they can be used to identify...
11:10
Genotypic Inference of HIV-1 Tropism Using Population-based Sequencing of V3
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Cited by 20 •
2010
HIV tropism can be inferred from the V3 region of the viral envelope. V3 is PCR amplified in triplicate using nested RT-PCR, sequenced, and interpreted using bioinformatic software. Samples with with 1 or more sequence(s) with low g2P scores are classified as non-R5 virus.
FAQs
Variants in CR1 can be relevant because they may correspond to differences in how much CR1 is expressed on cells or how the encoded receptor functions. Those differences provide a genetic route for examining complement regulation and immune-complex clearance. In research, comparing variant status with cellular or clinical phenotypes helps connect inherited sequence differences to measurable immune-related outcomes.
Allele-specific assays distinguish predetermined CR1 alleles by selective detection, whereas restriction analysis identifies variants that alter a restriction site. DNA sequencing can examine the nucleotide sequence directly in the selected region. These approaches therefore differ in how alleles are recognized, while all can support identification of inherited CR1 variation when applied to amplified genomic DNA.
Genotype-phenotype analysis tests whether inherited CR1 differences track with variation in immune responses, red blood cell biology, or susceptibility to complement-related conditions. The genotype supplies the inherited variable, while the phenotype supplies the observed biological or disease-related outcome. This pairing helps evaluate CR1 as a biologically relevant marker rather than considering sequence variation in isolation.
By identifying CR1 alleles in groups of individuals, researchers can characterize the distribution of inherited variation across populations. Those allele patterns can then be considered alongside differences in immune-related traits or disease research questions. This makes CR1 genotyping useful not only for individual genotype-phenotype studies, but also for investigating how genetic variation is represented in human populations.
The workflow begins with extraction of genomic DNA, followed by polymerase chain reaction to amplify selected CR1 regions. The amplified material is then analyzed with an allele-specific assay, restriction analysis, or DNA sequencing to identify alleles. The resulting genotype information can be organized for comparison with CR1 expression, function, red blood cell biology, immune responses, or disease-related observations.
Method selection depends on what type of allele information the study needs from the selected CR1 region. Allele-specific assays and restriction analysis provide targeted ways to distinguish variants, while sequencing reads the DNA sequence directly. Using one of these approaches after amplification gives the study a defined basis for assigning genotypes and relating them to the research question.
It is especially useful when a project asks whether inherited CR1 variation is associated with complement-related biology. Applications include immune-response studies, red blood cell research, susceptibility investigations, population genetics, and genotype-phenotype analysis. Across these settings, the genotype serves as a marker that can be evaluated alongside expression, function, or disease-related findings.