Blood Chimerism Detection
Blood Chimerism Detection - Related Videos
08:58
Fully Automated Centrifugal Microfluidic Device for Ultrasensitive Protein Detection from Whole Blood
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Cited by 8 •
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This protocol demonstrates how to achieve femto molar detection sensitivity of proteins in 10 µL of whole blood within 30 min. This can be achieved by using electrospun nanofibrous mats integrated in a lab-on-a-disc, which offers high surface area as well as effective mixing and washing for enhanced signal-to-noise ratio.
21:01
Generating Chimeric Zebrafish Embryos by Transplantation
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A step-by-step guide to generating targeted chimeric zebrafish embryos by transplantation at the blastula or gastrula stage.
04:38
An Ex Vivo Technique to Manufacture Chimeric Antigen Receptor T Cells
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2025
This video demonstrates a technique to manufacture chimeric antigen receptor (CAR) T cells ex vivo. Human T cells are incubated with magnetic beads coated with anti-CD3 and anti-CD28 antibodies, along with a medium supplemented with interleukin-2 (IL-2), leading to T cell activation and proliferation. Transgenic lentiviral vectors are introduced, allowing the transgenic RNA to integrate into the host genome and express the transgene. This results in the transduced T cells expressing chimeric...
04:10
Detection of Rhesus Factor in Human Blood Samples using Magnetic Levitation
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2025
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06:29
Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells
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Cited by 14 •
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Here we describe two assays for measuring complement activation induced by antibodies against red blood cells. The major advantage over the current assays is their quantitative and easy-to-interpret nature.
FAQs
The analysis compares donor- and recipient-specific genetic markers in DNA extracted from circulating blood cells. Short tandem repeat profiling and quantitative PCR identify genetic contributions associated with each individual, allowing the result to estimate the relative proportion of donor and recipient cell populations. This comparison makes genetic replacement measurable rather than relying only on clinical observation.
Mixed chimerism indicates that donor and recipient blood-cell populations are both detectable after transplantation. The finding shows that graft-derived cells have contributed to blood formation, but recipient cells remain present. Its significance depends on the pattern over time, because persistent or changing proportions can distinguish ongoing incomplete graft replacement from progressive donor-cell engraftment.
A single measurement provides a snapshot, whereas serial testing reveals whether donor-cell engraftment is increasing, remaining mixed, or declining relative to recipient cells. An increase in recipient cells can signal incomplete graft replacement or impending relapse. Repeated measurements therefore give transplant monitoring a time-based perspective that one result cannot provide.
Blood-derived DNA can be examined with short tandem repeat profiling or quantitative PCR. Both approaches support comparison of donor- and recipient-specific genetic signals and estimation of the proportion contributed by each cell population. The selected approach provides the genetic measurement used to follow engraftment, mixed chimerism, and changes in recipient-cell representation.
The workflow begins with circulating blood cells, from which DNA is obtained for analysis. Laboratory testing then examines donor- and recipient-specific markers using short tandem repeat profiling or quantitative PCR. The resulting signals are compared to estimate the representation of each cell population, and serial results are reviewed to evaluate changes in engraftment.
It is used most often after hematopoietic stem cell transplantation to monitor whether donor-derived blood cells are replacing recipient cells. Results can reveal donor-cell engraftment, persistent mixed chimerism, or increasing recipient-cell representation. These findings help inform transplant monitoring and treatment decisions, particularly when the pattern suggests incomplete graft replacement or possible impending relapse.
In biology and clinical research, chimerism measurements provide a way to track how donor and recipient blood-cell populations change after transplantation. Because blood cells reflect the developing balance between the two genetic contributions, serial results can support studies of donor-cell engraftment and immune reconstitution. The measurements connect genetic composition with post-transplant biological change.