Ali Shojaeian, Ameneh Mehri-Ghahfarrokhi, Mehdi Banitalebi-Dehkordi,
Volume 8, Issue 2 (Int J Mol Cell Med 2019)
Abstract
The capacity of human umbilical cord mesenchymal stem cells (hUMSCs) for migration and homing is very important in regenerative medicine. A detoxified derivative of lipopolysaccharides (LPS) that lacks many of the endotoxic properties of LPS is monophosphoryl lipid A (MPLA). Effects of MPLA on the induction of MSCs migration, have not yet been studied. Also, studies have shown that supernatant of Lactobacillus acidophilus (SLA) culture medium, can stimulate the proliferation of macrophages and lymphocytes in vitro by affecting the properties of the chemotaxis and angiogenesis. Our present study aimed to understanding of the migration of hUMSCs during treatment with MPLA and LS, separately. HUMSCs were isolated from human umbilical cord and were characterized by investigating surface markers (CD105, CD90, anti-CD29, CD45, and CD34) and their differentiation into adipogenic and osteogenic lineages. HUMSCs were treated with MPLA (10-3 µg/ml) and SLA (3 µl/ml). The morphological changes were not observed in both treated MSCs. Expression levels of migration markers were determined by quantitative reverse transcription PCR analysis on 2, 4, 6 days after treatment. Results showed that VEGF and MMP-2 but not CXCR-4 was increased in the presence of both treatments. Also, SLA led to a decrease and increase of the expression of VLA-4 and VCAM-1, respectively, while MPLA increased both VLA-4 and VCAM-1 expression.Therefore, it can be suggested that MPLA has more prominent results than SLA, but both treatments can probably be considered as an inducing factor in migration.
Ameneh Mehri-Ghahfarrokhi, Mahammad-Saeid Jami, Morteza Hashemzadeh Chaleshtori,
Volume 9, Issue 1 (Int J Mol Cell Med 2020)
Abstract
Previous studies have shown that miR-124 plays an important role in the development of auditory neurons, which are degenerated in the sensorineural hearing loss. However, whether the combined use of miR-124 and growth factors can increase the expression of neural related markers in human dental pulp stem cells is unknown so far. In this study, human dental pulp stem cells were transfected with miR-124 following treatment with brain-derived neurotrophic factor or epidermal growth factor/basic fibroblast growth factor. The expression of some neural related markers (nestin, SOX2, β-tubulin III, MAP2, and peripherin) was analyzed in two groups by qRT-PCR or immunofluorescence. Cellular treatment resulted in morphological changes including neurosphere-like colonies formation. Nestin and SOX2 were up-regulated, and MAP2 and peripherin were down-regulated in dental pulp stem cells transfected by miR-124 following treatment with brain-derived neurotrophic factor. Replacement of brain-derived neurotrophic factor with epidermal growth factor/ basic fibroblast growth factor resulted in the up-regulation of nestin, MAP2, peripherin, and β-tubulin III and down-regulation of SOX2. The expression of SOX2 and nestin was also confirmed by immunofluorescence. The combination of miR-124 and growth factors would provide a promising starting point for upregulating the neural progenitor markers in human dental pulp stem cells.
Ali Shojaeian, Ameneh Mehri-Ghahfarrokhi, Mehdi Banitalebi-Dehkordi,
Volume 9, Issue 4 (Int J Mol Cell Med 2020)
Abstract
Infertility is known as one of the most common problems among couples. In this regard, generation of male germ cells from adult stem ones are among the current promising priorities of researchers. Mesenchymal stromal cells (MSCs) were previously induced to differentiate into germ-like progenitors in vitro. Monophosphoryl lipid A (MPLA) is a detoxified derivative of lipopolysaccharides (LPS) that lacks many of the endotoxic properties of LPS. Our present study aimed to investigate the expression of migration genes (CXCR4, VCAM1, VEGF, MMP2, and VLA4), and differentiation markers during human umbilical mesenchymal stromal cells (hUMSCs) culture in the presence of retinoic acid (RA) and MPLA-treated acellular testis. Accordingly, the high expression levels of deleted in azoospermia-like (DAZL), piwi-like RNA-mediated gene silencing 2 (PIWIL2) transcripts as well as protein were consequently observed in treated hUMSCs. It was concluded that combination treatment (i.e., MPLA/RA) had more prominent results than each of the treatments alone, even though MPLA and RA could be regarded as inducer of migration and differentiation, respectively. Ultimately, it was suggested to introduce the use of combination treatment as a more effective strategy to improve therapies in regenerative medicine.
