Letter | Published:

Haematopoietic stem cells adopt mature haematopoietic fates in ischaemic myocardium

Nature volume 428, pages 668673 (08 April 2004) | Download Citation

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Abstract

Under conditions of tissue injury, myocardial replication and regeneration have been reported1. A growing number of investigators have implicated adult bone marrow (BM) in this process, suggesting that marrow serves as a reservoir for cardiac precursor cells2,3,4,5,6. It remains unclear which BM cell(s) can contribute to myocardium, and whether they do so by transdifferentiation or cell fusion. Here, we studied the ability of c-kit-enriched BM cells, Lin- c-kit+ BM cells and c-kit+ Thy1.1lo Lin- Sca-1+ long-term reconstituting haematopoietic stem cells to regenerate myocardium in an infarct model. Cells were isolated from transgenic mice expressing green fluorescent protein (GFP) and injected directly into ischaemic myocardium of wild-type mice. Abundant GFP+ cells were detected in the myocardium after 10 days, but by 30 days, few cells were detectable. These GFP+ cells did not express cardiac tissue-specific markers, but rather, most of them expressed the haematopoietic marker CD45 and myeloid marker Gr-1. We also studied the role of circulating cells in the repair of ischaemic myocardium using GFP+–GFP- parabiotic mice. Again, we found no evidence of myocardial regeneration from blood-borne partner-derived cells. Our data suggest that even in the microenvironment of the injured heart, c-kit-enriched BM cells, Lin- c-kit+ BM cells and c-kit+ Thy1.1lo Lin- Sca-1+ long-term reconstituting haematopoietic stem cells adopt only traditional haematopoietic fates.

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Acknowledgements

We thank G. Hoyt for technical assistance with animal surgery, and V. Mariano and L. Hildalgo for animal care. This work was supported by the Falk Cardiovascular research fund (R.C.R.) and an NIH grant (I.L.W.). L.B.B. was supported by Thoracic Surgery Foundation Nina Starr Braunwald Research Training Fellowship; A.J.W. was supported by an American Cancer Society grant and the Frederick Frank/Lehman Brothers, Inc. Irvington Institute Fellowship; J.L.C. was supported by a NIH Training Grant in Molecular and Cellular Immunobiology; and T.K. was supported by a German Research Society Training Grant.

Author information

Affiliations

  1. Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, California 94305, USA

    • Leora B. Balsam
    • , Theo Kofidis
    •  & Robert C. Robbins
  2. Department of Pathology, Stanford University School of Medicine, Stanford, California 94305, USA

    • Amy J. Wagers
    • , Julie L. Christensen
    •  & Irving L. Weissman
  3. Department of Developmental Biology, Stanford University School of Medicine, Stanford, California 94305, USA

    • Amy J. Wagers
    • , Julie L. Christensen
    •  & Irving L. Weissman

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Competing interests

Affiliations that might be perceived to have biased this work are as follows: (1) I.L.W. owns significant Amgen stock from participation on their scientific advisory board; (2) I.L.W. co-founded and consulted for Systemix, is a co-founder and director of Stem Cells, Inc., and recently co-founded Cellerant. None of these is involved in cardiac regeneration or the identification of bone marrow myocardial precursor cells.

Corresponding author

Correspondence to Robert C. Robbins.

Supplementary information

Image files

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    Supplementary Figure 1

    Cardiac tissue stained with Masson’s trichrome stain at 10 days and 30 days after infarction

  2. 2.

    Supplementary Figure 2

    Lymphoid differentiation of LT-HSCs injected into ischemic myocardium.

  3. 3.

    Supplementary Figure 3

    Cardiac tissue stained with Masson’s trichrome stain 6 weeks after infarction.

Word documents

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    Supplementary Figure Legends

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    Supplementary Tables

    Table 1: Echocardiographic function of cell-treated vs. saline-treated infarcted hearts at 2 weeks and 6 weeks post-injury; Table 2: Hemodynamic parameters of cell-treated and saline-treated infarcted animals 6 weeks after infarction; Table 3: Hematopoietic chimerism in parabiotic pairs.

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DOI

https://doi.org/10.1038/nature02460

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