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Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their...
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Protocol for MicroRNA Transfer into Adult Bone Marrow-derived Hematopoietic Stem Cells to Enable Cell Engineering Combined with Magnetic Targeting
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Engineered MSCs enable bone marrow-targeted immunomodulation.

Shuyue Xu1, Jingwen Xu1, Qiqi Yang1

  • 1School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China.

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|March 27, 2026
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Summary
This summary is machine-generated.

This study introduces a novel cell vector targeting the bone marrow (BM) to reprogram the immune system, offering a new strategy for treating cancer as a systemic immune disease.

Keywords:
BM targetingMSCsbone marrowbone marrow protectiondrug deliveryimmune therapymesenchymal stromal cellsmetastatic organotropismtumor evasion

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Area of Science:

  • Immunology
  • Oncology
  • Biotechnology

Background:

  • Cancer is linked to systemic immune dysregulation, but current treatments overlook this, focusing on local tumor effects.
  • Targeting distant immune organs like the bone marrow (BM) for cancer therapy without affecting tumors is difficult.

Purpose of the Study:

  • To develop a bone marrow (BM)-targeted and tumor-evasive cell vector for systemic immune reprogramming.
  • To establish a versatile framework for treating cancer as a systemic immune disease through targeted immunomodulation.

Main Methods:

  • Engineered mesenchymal stem cells (MSCs) overexpressing Golgi apparatus protein 1 (MSCGlg1) to mimic BM signals.
  • Utilized MSCGlg1 to deliver CDK4/6 inhibitors (CDK4/6i) in a myelosuppression model and interleukin-7 (IL-7) in a tumor model.

Main Results:

  • MSCGlg1 protected hematopoietic stem and progenitor cells (HSPCs) from chemotherapy toxicity while maintaining antitumor efficacy.
  • MSCGlg1 restored immune competence without promoting tumor growth in a subcutaneous tumor model.

Conclusions:

  • The developed BM-targeted cell vector enables localized immunomodulation within the BM niche for systemic immune reprogramming.
  • This approach offers a promising strategy for cancer treatment by addressing the systemic immune aspects of tumorigenesis and metastasis.