Change of the metabolomic profile during short-term mononuclear cell storage.
Vox Sang
; 112(2): 163-172, 2017 Feb.
Article
in En
| MEDLINE
| ID: mdl-28052337
ABSTRACT
BACKGROUND AND OBJECTIVES:
Short-term storage of leukapheresis products used for immunotherapeutic mononuclear cell (MNC) products is a frequent event. The analysis of time-related metabolic patterns enables the characterization of storage-related effects in MNCs and the hypothesis-based optimization of the MNC medium. MATERIALS ANDMETHODS:
The MNC products from seven leukapheresis procedures were stored within a closed bag system for 48 h. Concentrations of amino acids, biogenic amines, phospho- and sphingolipids and hexoses in the medium were measured by targeted metabolomics. The viability of MNC subpopulations was assayed by Annexin V (AnV) and JC-1 staining.RESULTS:
Glucose depletion and a significant change of the acylcarnitine profile are early events within the first 24 h of storage. In contrast, for most amino acids, the maximum increase was observed at 48 h of storage as mirrored by an increase in the amino acid levels by a mean factor of 1·2 (1·3, 2·0) after 6 h (24 h, 48 h, respectively). This was except for the concentrations of glutamine and lysine, which did not change significantly. The taurine concentration showed a twofold increase within the first 24 h and remained constant thereafter. The steepest increase in AnV+ and 7-AAD+ CD4+ T cells was found between 24 and 48 h.CONCLUSION:
The time-course of apoptosis and metabolic patterns in the MNC products demonstrate that 24 h of storage is a decisive time-point, as afterwards key metabolic pathways showed nonlinear detrimental changes. Optimization of storage by supplementation of specific substrates demands therefore an early intervention.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Blood Preservation
/
Leukocytes, Mononuclear
Limits:
Humans
Language:
En
Journal:
Vox Sang
Year:
2017
Document type:
Article
Affiliation country:
Alemania