Comparison of the Differentiation Potential and Characteritics of Mesenchymal Stem Cells Isolated from Human Umbilical Cord Blood and Bone Marrow to Hepatocyte-like Cells

Authors
S. K. Khajeniazi 1
M. Shahrabi Farahani 2
M. Soleimani 1
1 Tarbiat Modares University
2 Department of Medical Genetics Faculty of Medical Sciences Tarbiat Modares University, Tehran, Iran
Abstract
Background: In recent years we have successfully adopted an in vitro hepatogenic differentiation of mesenchymal stem cells (MSCs). In this protocol the biologically active hepatocyte-like cells were differentiated from the stem cells isolated from either bone marrow or umbilical cord blood (UCB) samples. The aim of the present study was to compare the efficiency of the hepatogenic differentiation of MSCs isolated from UCB and MSCs. Methods: Differentiation process of MSCs was carried out in a selective medium supporting hepatogenic differentiation for 3 weeks. Then using specific markers we have examined the hepatocyte formation following hepatogenic differentiation of the stem cells. Hepatogenic markers namely albumin, α-fetoprotein (AFP) and cytochrome P450 3A4 (CYP3A4) were monitored at different time intervals during differentiation. Results: Transdifferentiation of the UCB and bone marrow MSCs was also characterized by measuring albumin, AFP and CYP3A4 at mRNA levels using reverse transcription polymerase chain reaction (RT-PCR). AFP was expressed in the undifferentiated UCB-MSCs and increased on day 21 of differentiation. However, AFP was not detected in the undifferentiated bone marrow MSCs. But, AFP expression started during the first week of differentiation. Albumin expression was detected in hepatocytes from UCB as well as bone marrow. The expression of albumin and its secretion from hepatocyte prepared from bone marrow appeared earlier compared to the cells derived from UCB. Metabolic function of the hepatocytes evaluated by secretion of albumin in the culture media was also similar in the cells isolated from both the sources. Conclusions: The differentiation potential of MSCs derived from human UCB and bone marrow under in vitro condition is comparable. However, it appears that there is time-dependent difference in the onset of expression of liver specific markers particularly albumin synthesis in hepatocytes derived from different stem cells.

Keywords

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Molecular and Biochemical Diagnosis Journal
Volume 1, Issue 2
July 2014
Pages 123-133