Intrafemoral Injection of Human Hematopoietic Stem and Progenitor Cells into Immunocompromised Mice

Emily  F. Calderbank; Laura Magnani; Elisa Laurenti

doi:10.3791/66315

Inyección intrafemoral de células madre y progenitoras hematopoyéticas humanas en ratones inmunoc...

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Intrafemoral Injection of Human Hematopoietic Stem and Progenitor Cells into Immunocompromised Mice

Inyección intrafemoral de células madre y progenitoras hematopoyéticas humanas en ratones inmunocomprometidos

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03:40 min

December 8, 2023

DOI: 10.3791/66315-v

Emily F. Calderbank¹, Laura Magnani¹, Elisa Laurenti¹

¹Wellcome and Medical Research Council Cambridge Stem Cell Institute, Department of Haematology,University of Cambridge

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Overview

This study investigates the dynamics of hematopoietic stem and progenitor cells (HSPCs) across human development, utilizing intrafemoral injection in immunodeficient mice to enhance cell engraftment. By placing HSPCs directly into the bone marrow, the research aims to improve our understanding of normal blood cell development and the influence of age and disease.

Key Study Components

Research Area

Stem cell biology
Human hematopoiesis
Disease modeling

Background

Healthy human hematopoiesis is studied from fetal stages to elderly.
Understanding the healthy context aids in deciphering disease mechanisms.
Transplantation experiments provide functional insights into stem cell behavior.

Methods Used

Intrafemoral injection of human HSPCs
Immunodeficient mouse model
Cell culturing and preparation techniques

Main Results

Direct injection leads to higher stem cell engraftment.
Provides a quantitative perspective on aging and stem cell function.
Highlights the impact of external factors like inflammation on stem cells.

Conclusions

The study demonstrates effective methods for HSPC engraftment.
Offers insights into blood stem cell evolution and disease predisposition.

Frequently Asked Questions

What is the significance of HSPCs in blood formation?

HSPCs are essential for the formation of all types of blood cells throughout an individual's life.

Why use intrafemoral injections?

This method bypasses the homing phase, allowing for better engraftment of stem cells directly into the bone marrow.

What are the implications of this research for aging?

Understanding how HSPCs function over time can help identify how age-related diseases develop.

How does inflammation affect HSPCs?

Inflammation can alter the function and behavior of HSPCs, potentially leading to diseases.

What are the expected outcomes of the intrafemoral injection?

Higher engraftment rates and more reliable data on HSPC function compared to traditional methods.

Can this method be applied to other cell types?

While primarily used for HSPCs, similar techniques could potentially be adapted for other cell types.

What future research directions does this work suggest?

Future studies could explore the effects of various conditions on HSPC function and health across different age groups.

Las inyecciones intrafemorales permiten el injerto de un pequeño número de células madre y progenitoras hematopoyéticas (HSPC), colocando las células directamente en la cavidad de la médula ósea. En este trabajo describimos un protocolo experimental de inyección intrafemoral de HSPCs humanas en ratones inmunodeficientes.

Nuestro interés es el estudio de la hematopoyesis humana sana a lo largo de toda la vida, desde el feto hasta el anciano. Por ejemplo, estudiamos el hígado en el feto y la médula ósea y la sangre periférica en el adulto. Creemos que es importante estudiar el contexto saludable para ayudarnos a entender qué es lo que falla en la enfermedad.

Hay muchos enfoques de ónix unicelular que han avanzado en el campo en los últimos años, pero estos trabajan junto a los experimentos de trasplante que prueban la función de las células madre en lugar de reemplazarlos. Al inyectar células madre y progenitoras sanguíneas directamente en el fémur, evitamos la fase de localización de las inyecciones intravenosas. Las células ya están en su entorno natural y, por lo tanto, a menudo tenemos un injerto mucho mayor.

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Palabras clave: Células madre hematopoyéticas HSC células madre y progenitoras hematopoyéticas HSPC xenotrasplante inyección intrafemoral ratones inmunocomprometidos médula ósea injerto citometría de flujo tipos de células sanguíneas