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The Immunosuppressive Activity of Amniotic Membrane Mesenchymal Stem Cells on T Lymphocytes.

Alikarami F, Yari F, Amirizadeh N, Nikougoftar M, Jalili MA - Avicenna J Med Biotechnol (2015 Jul-Sep)

Bottom Line: The difference was significant between the case and control samples (p<0.05).All the comparisons were carried out between the case (Tcell+PHA+hAM-MSCs) and control (Tcell+PHA) groups.In conclusion, hAM-MSCs could inhibit the (mitogen-activated) T cells even in the absence of blood monocytes.

View Article: PubMed Central - PubMed

Affiliation: Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran.

ABSTRACT

Background: Mesenchymal Stem Cells (MSCs) are isolated from different sources like placenta. The placenta and its membranes like Amniotic Membrane (AM) are readily available and easy to work with. There is only limited knowledge on the immunomodulatory properties of human Amniotic Membrane-derived Mesenchymal Stem Cells (hAM-MSCs). The aim of this study was to survey the suppressive activity of hAM-MSCs on T lymphocytes in vitro.

Methods: Human AMs were obtained after caesarean section births from healthy women. After enzymatic digestion, cells were cultured and hAM-MSCs were obtained. In addition, human T lymphocytes were isolated and co-cultured with hAM-MSCs for 72 hr in the presence or absence of phytohemagglutinin (PHA). Subsequently, proliferation of T cells was analyzed using BrdU and subsequently flow cytometry technique. Besides, the production of IL-4 and IFN-γ was examined by ELISA method. Additionally, the expression of activation markers (CD38, HLA-DR) was studied on T lymphocytes by flow cytometry technique.

Results: It was revealed that hAM-MSCs could significantly suppress the proliferation of T lymphocytes (p≤0.01) and significantly decrease the production of IFN-γ by T cells (p<0.05). hAM-MSCs also down regulated the expression of activation markers on the surface of T lymphocytes, CD38 and HLA-DR. The difference was significant between the case and control samples (p<0.05). All the comparisons were carried out between the case (Tcell+PHA+hAM-MSCs) and control (Tcell+PHA) groups.

Conclusion: In conclusion, hAM-MSCs could inhibit the (mitogen-activated) T cells even in the absence of blood monocytes. Besides, hAM-MSCs-mediated inhibition of T lymphocytes was combined with down regulation of activation markers.

No MeSH data available.


Related in: MedlinePlus

Cytokine levels in the supernatant of the co-culture medium of hAM-MSCs and Tcells in the presence or absence of PHA. A) Production of IL-4 and B) IFN-γ was detected using ELISA method. Each bar was compared with T cell+PHA (control T cells) group. Data were presented as the mean±SD of four independent experiments *p<0.05, ** p≤ 0.01.
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Figure 4: Cytokine levels in the supernatant of the co-culture medium of hAM-MSCs and Tcells in the presence or absence of PHA. A) Production of IL-4 and B) IFN-γ was detected using ELISA method. Each bar was compared with T cell+PHA (control T cells) group. Data were presented as the mean±SD of four independent experiments *p<0.05, ** p≤ 0.01.

Mentions: IL-4 and IFN-γ were measured in the supernatant of the culture medium to evaluate the effects of hAM-MSC on the activity of the T cells. As it could be seen in table 1 and figure 4A, the inhibitory effects of hAM-MSC on the production of IL-4 were not remarkable and the differences were not significant between each bar and T cell+PHA (control T cells) group. Nevertheless, in different densities of hAM-MSC, the production of IFN-γ significantly decreased compared to T cell+PHA (control T cells) group (Table 1 and Figure 4B).


The Immunosuppressive Activity of Amniotic Membrane Mesenchymal Stem Cells on T Lymphocytes.

Alikarami F, Yari F, Amirizadeh N, Nikougoftar M, Jalili MA - Avicenna J Med Biotechnol (2015 Jul-Sep)

Cytokine levels in the supernatant of the co-culture medium of hAM-MSCs and Tcells in the presence or absence of PHA. A) Production of IL-4 and B) IFN-γ was detected using ELISA method. Each bar was compared with T cell+PHA (control T cells) group. Data were presented as the mean±SD of four independent experiments *p<0.05, ** p≤ 0.01.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4508338&req=5

Figure 4: Cytokine levels in the supernatant of the co-culture medium of hAM-MSCs and Tcells in the presence or absence of PHA. A) Production of IL-4 and B) IFN-γ was detected using ELISA method. Each bar was compared with T cell+PHA (control T cells) group. Data were presented as the mean±SD of four independent experiments *p<0.05, ** p≤ 0.01.
Mentions: IL-4 and IFN-γ were measured in the supernatant of the culture medium to evaluate the effects of hAM-MSC on the activity of the T cells. As it could be seen in table 1 and figure 4A, the inhibitory effects of hAM-MSC on the production of IL-4 were not remarkable and the differences were not significant between each bar and T cell+PHA (control T cells) group. Nevertheless, in different densities of hAM-MSC, the production of IFN-γ significantly decreased compared to T cell+PHA (control T cells) group (Table 1 and Figure 4B).

Bottom Line: The difference was significant between the case and control samples (p<0.05).All the comparisons were carried out between the case (Tcell+PHA+hAM-MSCs) and control (Tcell+PHA) groups.In conclusion, hAM-MSCs could inhibit the (mitogen-activated) T cells even in the absence of blood monocytes.

View Article: PubMed Central - PubMed

Affiliation: Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran.

ABSTRACT

Background: Mesenchymal Stem Cells (MSCs) are isolated from different sources like placenta. The placenta and its membranes like Amniotic Membrane (AM) are readily available and easy to work with. There is only limited knowledge on the immunomodulatory properties of human Amniotic Membrane-derived Mesenchymal Stem Cells (hAM-MSCs). The aim of this study was to survey the suppressive activity of hAM-MSCs on T lymphocytes in vitro.

Methods: Human AMs were obtained after caesarean section births from healthy women. After enzymatic digestion, cells were cultured and hAM-MSCs were obtained. In addition, human T lymphocytes were isolated and co-cultured with hAM-MSCs for 72 hr in the presence or absence of phytohemagglutinin (PHA). Subsequently, proliferation of T cells was analyzed using BrdU and subsequently flow cytometry technique. Besides, the production of IL-4 and IFN-γ was examined by ELISA method. Additionally, the expression of activation markers (CD38, HLA-DR) was studied on T lymphocytes by flow cytometry technique.

Results: It was revealed that hAM-MSCs could significantly suppress the proliferation of T lymphocytes (p≤0.01) and significantly decrease the production of IFN-γ by T cells (p<0.05). hAM-MSCs also down regulated the expression of activation markers on the surface of T lymphocytes, CD38 and HLA-DR. The difference was significant between the case and control samples (p<0.05). All the comparisons were carried out between the case (Tcell+PHA+hAM-MSCs) and control (Tcell+PHA) groups.

Conclusion: In conclusion, hAM-MSCs could inhibit the (mitogen-activated) T cells even in the absence of blood monocytes. Besides, hAM-MSCs-mediated inhibition of T lymphocytes was combined with down regulation of activation markers.

No MeSH data available.


Related in: MedlinePlus