Langenbeck's Archives of Surgery

, Volume 398, Issue 1, pp 161–167

Plasma clots gelled by different amounts of calcium for stem cell delivery

Authors

    • Department of General and Trauma SurgeryBG University Hospital Bergmannsheil, Ruhr University Bochum
  • Dominik Seybold
    • Department of General and Trauma SurgeryBG University Hospital Bergmannsheil, Ruhr University Bochum
  • Elvira Peter
    • Department of Surgical ResearchBG University Hospital Bergmannsheil, Ruhr University Bochum
  • Thomas Armin Schildhauer
    • Department of General and Trauma SurgeryBG University Hospital Bergmannsheil, Ruhr University Bochum
  • Manfred Köller
    • Department of Surgical ResearchBG University Hospital Bergmannsheil, Ruhr University Bochum
Original Article

DOI: 10.1007/s00423-012-1015-8

Cite this article as:
Gessmann, J., Seybold, D., Peter, E. et al. Langenbecks Arch Surg (2013) 398: 161. doi:10.1007/s00423-012-1015-8

Abstract

Purpose

Freshly prepared autologous plasma clots may serve as a carrier matrix for expanded multipotent mesenchymal stromal cells (MSCs) or bone marrow cells. By varying the calcium concentration, plasma clots with different properties can be produced. The purpose of this in vitro study was to determine the optimal calcium concentrations for the clotting process, intra-clot cell viability, and clot lysis.

Methods

Different plasma clots were prepared by adding an equal volume of RPMI1640 (with or without MSCs) to citrate plasma (either containing platelets or platelet-free). Clotting was initiated by the addition of CaCl2 (10 g/100 ml H2O, 10 % solution). The final concentration of CaCl2 ranged from 1 to 10 % by volume of plasma. Viability and distribution of the MSCs were analysed by calcein-AM/propidium iodide staining. MSC-embedded plasma clots were dissolved with trypsin (0.25 %), and recovered cells were further incubated for 1 week under cell culture conditions.

Results

The viability of MSCs embedded in clots formed by the addition of 1–8 % by volume CaCl2 was not affected by incubation of up to 1 week. In contrast, clots produced by higher volumes of CaCl2 solutions (9–10 % by volume of plasma) showed decreased numbers of viable cells. Intra-clot cell proliferation was highest in clots produced by addition of 5 % CaCl2 by plasma volume. Osteocalcin release was not influenced in platelet-free plasma but decreased in platelet-containing plasma. Morphological analysis of stained recovered MSCs revealed that lysis of the plasma clot did not affect cell morphology or subsequent spontaneous proliferation.

Conclusions

Clot formation and clot stability can be controlled by changing the concentration of CaCl2 added to plasma. The addition of 5 % CaCl2 produced a plasma clot with optimal results for stem cell delivery.

Keywords

Mesenchymal stromal cellsPlasma clotTissue engineeringFracture healingBone regeneration

Copyright information

© Springer-Verlag Berlin Heidelberg 2012