作者：Zhong Yang1, Qing Zeng2, Zhiyuan Ma1, Yaming Wang1, Xiaoyin Xu2 1Department of Anesthesia,Brigham and Woman's Hospital, 2Department of Radiology,Brigham and Woman's Hospital

简介：We describe an in vivo fluorescence imaging protocol to monitor muscle regeneration by GFP-labeled myoblasts after transplantation into skeletal muscles of both healthy and dystrophic mice. This protocol can be adapted to study muscle regeneration by transplantation of other types of cells and in other muscular conditions as well.

全文：

Overview

This article presents an in vivo fluorescence imaging protocol to monitor muscle regeneration using GFP-labeled myoblasts in both healthy and dystrophic mice. The method allows for the adaptation to study various types of cell transplantation in different muscular conditions.

Key Study Components

Area of Science

Neuroscience
Cell Biology
Regenerative Medicine

Background

Muscle regeneration is a critical area of study in regenerative medicine.
GFP labeling allows for the visualization of transplanted cells.
Understanding muscle repair mechanisms can lead to improved therapies for muscular diseases.
In vivo imaging techniques provide real-time insights into cellular dynamics.

Purpose of Study

To develop a reliable protocol for monitoring muscle regeneration.
To assess the engraftment and behavior of transplanted muscle stem cells.
To enable longitudinal studies of muscle repair processes.

Methods Used

Isolation and culture of GFP-labeled myoblasts from transgenic mice.
Transplantation of cells into the tibialis anterior muscle of anesthetized mice.
In vivo fluorescence imaging to monitor cell behavior post-transplantation.
Quantitative analysis of fluorescence intensity over time to assess muscle regeneration.

Main Results

Initial high signal intensity of GFP-labeled cells post-injection.
Signal intensity decreased on day two, indicating a reduction in cell numbers.
Stable signal intensity observed by days seven, fourteen, and twenty-one, suggesting successful muscle regeneration.
Longitudinal imaging allows for the collection of accurate data with fewer animals.

Conclusions

The developed imaging protocol is effective for studying muscle regeneration.
Fluorescence imaging provides valuable insights into the dynamics of transplanted cells.
This method can be adapted for various cell types and conditions in muscle research.

Frequently Asked Questions

What is the main focus of this study?

The study focuses on developing a protocol for in vivo fluorescence imaging to monitor muscle regeneration using GFP-labeled myoblasts.

How are the muscle stem cells prepared for transplantation?

Muscle stem cells are isolated from GFP transgenic mice, cultured, and then prepared for transplantation into the mouse model.

What imaging technique is used in this study?

The study employs in vivo fluorescence imaging to monitor the behavior of transplanted cells in real-time.

What were the key findings regarding signal intensity?

Signal intensity was initially high, decreased on day two, and stabilized by days seven, fourteen, and twenty-one, indicating successful muscle regeneration.

Can this protocol be adapted for other cell types?

Yes, the protocol can be adapted to study muscle regeneration with different types of cells and in various muscular conditions.

What is the significance of this research?

This research provides insights into muscle repair mechanisms and offers a method for more accurate longitudinal studies in regenerative medicine.