Effects of hypoxic culture conditions on umbilical cord-derived human mesenchymal stem cells.

Cell Communication and Signaling : CCS
Antonina LavrentievaRalf Hass

Abstract

Following cultivation of distinct mesenchymal stem cell (MSC) populations derived from human umbilical cord under hypoxic conditions (between 1.5% to 5% oxygen (O2)) revealed a 2- to 3-fold reduced oxygen consumption rate as compared to the same cultures at normoxic oxygen levels (21% O2). A simultaneous measurement of dissolved oxygen within the culture media from 4 different MSC donors ranged from 15 mumol/L at 1.5% O2 to 196 mumol/L at normoxic 21% O2. The proliferative capacity of the different hypoxic MSC populations was elevated as compared to the normoxic culture. This effect was paralleled by a significantly reduced cell damage or cell death under hypoxic conditions as evaluated by the cellular release of LDH whereby the measurement of caspase3/7 activity revealed little if any differences in apoptotic cell death between the various cultures. The MSC culture under hypoxic conditions was associated with the induction of hypoxia-inducing factor-alpha (HIF-1alpha) and an elevated expression of energy metabolism-associated genes including GLUT-1, LDH and PDK1. Concomitantly, a significantly enhanced glucose consumption and a corresponding lactate production could be observed in the hypoxic MSC cultures suggesting an altere...Continue Reading

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Citations

Apr 9, 2013·Tissue Engineering. Part C, Methods·Anna OtteRalf Hass
Sep 5, 2012·Cell Communication and Signaling : CCS·Ralf Hass, Anna Otte
Sep 15, 2011·Cell Communication and Signaling : CCS·Hendrik UngefrorenRalf Hass
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Methods Mentioned

BETA
Cesarean section
Assay
electrophoresis
FCS
Fluorescence

Software Mentioned

[UNK] Designer

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