Low-molecular-weight carbohydrate Pentaisomaltose may replace dimethyl sulfoxide as a safer cryoprotectant for cryopreservation of peripheral blood stem cells

Research output: Contribution to journalArticle


BACKGROUND: Cryopreserved hematopoietic stem cell products are widely used for certain hematologic malignancies. Dimethyl sulfoxide (DMSO) is the most widely used cryoprotective agent (CPA) today, but due to indications of cellular toxicity, changes of the cellular epigenetic state, and patient-related side effects, there is an increasing demand for DMSO-free alternatives. We therefore investigated whether Pentaisomaltose (PIM), a low-molecular-weight carbohydrate (1 kDa), can be used for cryopreservation of peripheral blood stem cells, more specifically hematopoietic progenitor cell apheresis (HPC(A)) product. STUDY DESIGN AND METHODS: We cryopreserved patient or donor HPC(A) products using 10% DMSO or 16% PIM and quantified the recovery of CD34+ cells and CD34+ subpopulations by multicolor flow cytometry. In addition, we compared the frequency of HPCs after DMSO and PIM cryopreservation using the colony-forming cells (CFCs) assay. RESULTS: The mean CD34+ cell recovery was 56.3±23.7% (11.4%-97.3%) and 58.2±10.0% (45.7%-76.9%) for 10% DMSO and 16% PIM, respectively. The distribution of CD34+ cell subpopulations was similar when comparing DMSO or PIM as CPA. CFC assay showed mean colony numbers of 70.7±25.4 (range, 37.8-115.5) and 67.7±15.7 (range, 48-86) for 10% DMSO and 16% PIM, respectively. CONCLUSION: Our findings demonstrate that PIM cryopreservation of HPC(A) products provides recovery of CD34+ cells, CD34+ subpopulations, and CFCs similar to that of DMSO cryopreservation and therefore may have the potential to be used for cryopreservation of peripheral blood stem cells.


  • Jesper Dyrendom Svalgaard
  • Eva Kannik Haastrup
  • Peter Viktor Glovinski
  • Kristian Reckzeh
  • Bjørn Holst
  • Jette Sønderskov Gørløv
  • Morten Bagge Hansen
  • Kim Theilgaard Moench
  • Christian Clausen
  • Anne Fischer-Nielsen
External organisations
  • Copenhagen University Hospital
  • Skåne University Hospital
  • Bioneer A/S
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Basic Medicine
  • Biomaterials Science
  • Cancer and Oncology


  • Stem cells, Cryoprotectant, crypreservation
Original languageEnglish
Pages (from-to)1088-95
Issue number5
Publication statusPublished - 2016 May
Publication categoryResearch
Externally publishedYes