Clinical-scale in vitro expansion preserves biological characteristics of cardiac atrial appendage stem cells.

Abstract:

OBJECTIVES:Cardiac atrial appendage stem cells (CASCs) have recently emerged as an attractive candidate for cardiac regeneration after myocardial infarction. As with other cardiac stem cells, CASCs have to be expanded ex vivo to obtain clinically relevant cell numbers. However, foetal calf serum (FCS), which is routinely used for cell culturing, is unsuitable for clinical purposes, and influence of long-term in vitro culture on CASC behaviour is unknown. MATERIALS AND METHODS:We examined effects on CASC biology of prolonged expansion, and evaluated a culture protocol suitable for human use. RESULTS:In FCS-supplemented medium, CASCs could be kept in culture for 55.75 ± 3.63 days, before reaching senescence. Despite a small reduction in numbers of proliferating CASCs (1.37 ± 0.52% per passage) and signs of progressive telomere shortening (0.04 ± 0.02 kb per passage), their immunophenotype and myocardial differentiation potential remained unaffected during the entire culture period. The cells were successfully expanded in human platelet plasma supernatant, while maintaining their biological properties. CONCLUSIONS:We successfully developed a protocol for long-term culture, to obtain clinically relevant CASC numbers, while retaining their cardiogenic potential. These insights in CASC biology and optimization of a humanized platelet-based culture method are an important step towards clinical application of CASCs for cardiac regenerative medicine.

journal_name

Cell Prolif

journal_title

Cell proliferation

authors

Windmolders S,Willems L,Daniëls A,Linsen L,Fanton Y,Hendrikx M,Koninckx R,Rummens JL,Hensen K

doi

10.1111/cpr.12166

subject

Has Abstract

pub_date

2015-04-01 00:00:00

pages

175-86

issue

2

eissn

0960-7722

issn

1365-2184

journal_volume

48

pub_type

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