Anti-Tubulin monoclonal antibody, clone ZPM2/45

The therapy based on mesenchymal stem cells(MSCs) has received growing attraction for Alzheimer's disease (AD). However, a great challenge in this regard is the low survival rate of MSCs following transplantation. This study seeks to improve the therapy based on Bone Marrow MSCs (BM-MSCs) through melatonin (MT) pretreatment, which is 'a known antioxidant' in an animal model of AD. In this paper, we separated BMSCs from the rat tibia and femur bones and then pretreated cells were with 5 mu M of MT for 24 h.The sample consisted of 40 male Wistar rats randomly assigned to the control, sham,MT-pretreated BMSCs and amyloid-beta (A beta) peptide BMSCs groups.Two months after the cell transplantation,a number of tests including novel object recognition, Morris water maze, passive avoidance test, and open field test were undertaken. 69 days after the cell therapy,the rats were sacrificed.We removed brain tissues histopathological analysis and carried out immunohistochemistry for Beta tubulin, GFAP and iba1 proteins.The results suggested that both MT-BMSCs and BMSCs moved to brain tissues following the intravenous transplantation.However,MT-BMSCs had a significant effect on boosting learning, cognition and memory in comparison with BMSCs (P < 0.05). Furthermore, there was a significant rise in GFAP and Beta tubulin and substantial fall in microglial cells in the BMSCs in comparison with MT-BMSCs.Stem cell therapy has been proposed as an effective strategy for neurodegenerative diseases,but its therapeutic features are restricted.It has been shown that the pretreatment of MSCs with melatonin partly would boost cells efficiency and thereby alleviate AD complications such as memory and cognition.

BackgroundCurrently, numerous animal studies have shown that exposure to commonly used general anesthetics during pregnancy may cause neurocognitive impairment in the offspring. Reportedly, exposure to sevoflurane during mid-trimester of pregnancy can inhibit proliferation of neural stem cells (NSCs) and lead to early apoptosis. Whether exposure to sevoflurane during pregnancy affects the differentiation of NSCs remains unclear.MethodsIn the present study, pregnant rats were exposed to 3% sevoflurane once for 2h on gestational day 14 (G14) or 3 times for 2h on G13, G14, and G15. Next, the differentiation of NSCs was measured using neuron marker beta -tubulin III and astrocyte marker glial fibrillary acidic protein (GFAP) in fetal brain tissues 24h and 72h after anesthesia and in hippocampus on postnatal day 28. Primary cultured rat NSCs were exposed to 4.1% sevoflurane to explore the mechanism.ResultsThe results showed that during mid-trimester, multiple exposures to sevoflurane can cause premature differentiation of NSCs in developing brains of offspring and lead to long-term neuron reduction and astrocyte proliferation in hippocampus. The data from the present study indicated that repeated exposure to sevoflurane downregulated atrophin-1 (ATN1) expression and caused early differentiation of NSCs. Overexpression of ATN1 via lentivirus transfection attenuated the influence of sevoflurane. Using dual luciferase assay, ATN1 was found to be a target gene of microRNA-410-3p (miR-410-3p). MiR-410-3p suppression via lentivirus transfection recovered the ATN1 expression and differentiation of NSCs.ConclusionsThe results from the present study demonstrated that repeated exposure to sevoflurane leads to early differentiation of NSCs and long-term effects via the miR-410-3p/ATN1 pathway.