[Effect of burn blister fluid on human mesenchymal stem cell (MSC) in vitro and its phenotypic modulation in culture].
OBJECTIVE
To study the effect of blister fluid obtained from burn patient on human MSCs in vitro and its phenotypic modulation in culture.


METHODS
Blister fluid from burn patients was collected at 12, 24, 48 post burn hour (PBH). The human MSCs were isolated, cultured, amplified and identified in vitro, then were divided into A (culture with 20% blister fluid collected at 12 PBH) , B (culture with 20% blister fluid collected at 24 PBH), C (culture with 20% blister fluid collected at 48 PBH), N (with ordinary culture medium) groups. The growth of MSCs and micro-organisms in blister fluid were observed. Positive expression rates of CD44 and CK7 were detected by flow cytometry after culture for 8 days.


RESULTS
Bacterial and fungal growths were absent in 15 blister fluid samples. There was no obvious change in MSC morphology in each group. Compared with that of N group, the number of MSCs in A, B, C groups was decreased, especially in C group. CD44 positive expression rate in A, B, C groups was (83.0 +/- 3.1)%, (77.2 +/- 2.9)% and (65.1 +/- 2.3)%, respectively,which was obviously lower than that in N group [(89.5 +/- 3.2)%, P < 0.01]. CK7 positive expression rate in A, B, C groups was (24.06 +/- 0.11)%, (16.41 +/- 0.09)% and (4.48 +/- 0.07)%, respectively, which was obviously higher than that in N group [(3.87 +/- 0.04)%, P < 0.01].


CONCLUSIONS
Burn blister fluid can obviously inhibit the growth of human MSC cultured in vitro, and may promote modulation of its phenotype to certain extent.
Liu
Li-Zhu
LZ
Department of Burns, Guangzhou First Municipal People's Hospital, Guangzhou Medical College, Guangzhou 510180, China.
Rong
Xin-Zhou
XZ
Zhang
Tao
T
Yang
Rong-Hua
RH
Wang
Zhen
Z
D001768:Blister / Q000378:metabolism; D001854:Bone Marrow Cells / Q000166:cytology*; D002056:Burns; D002454:Cell Differentiation; D002469:Cell Separation; D002478:Cells, Cultured; D005434:Flow Cytometry; D006801:Humans; D059630:Mesenchymal Stem Cells / Q000166:cytology*