Bone Marrow Mesenchymal Stem Cells (BMSCs) Promote Neuronal Cell Repair in Spinal Cord Injury by Regulating Toll-Like Receptor 4/Nuclear Factor-Kappa B Signaling Pathway

SCI (SCI) poses a challenge to nerve cell repair strategies. SCI injury can lead to the development of inflammation, which in turn can exacerbate nerve cell damage. The TLR4/NF-kappa B signaling pathway is a common inflammatory signaling pathway. Since BMSCs are involved in injury repair, whether they can promote the repair of SCI neuronal cells have not been reported. Spinal cord nerve cells were cultured in vitro and divided into mechanical injury group and BMSCs group followed by analysis of cell proliferation activity and detection of altered apoptotic activity. Changes in the concentrations of IL-6 and IL-1β were measured by ELISA and cellular mitochondrial alterations was assessed by JG-B staining along with analysis of NF-kappa B, TLR4, related neurodevelopmental factor BDNF, and NGF expression by western blot. Mechanical damage to neuronal cells resulted in decreased cell proliferation, increased apoptotic activity, decreased cellular mitochondrial activity, increased TLR4 and NF-kappa B expression, decreased BDNF and NGF expression, as well as increased secertions of IL-6 and IL-1β (P < 0.05). In contrast, co-culture with BMSCs resulted in increased proliferation and decreased apoptosis of mechanically injured neuronal cells, increased cellular mitochondrial activity, with observation of the inverse changes in other factors (P < 0.05). In conclusion, BMSCs can suppress inflammation and promote repair of injured neuronal cells by inhibiting TLR4/NF-kappa B signaling.

Architecting and Tailoring of Cell Repair Molecular Machinery: Molecule-by-Molecule and Atom-by-Atom

In cell, any breakdown in cellular (metabolic and anabolic) process because of diseases or disorders, immediately effect functioning of cell and interrupt life, art of healing (medicine) repairs cell to regain its normal functioning as earlier it was. Adverse environmental conditions responsible for damage and exceed the maintenance time of repair in cell, or insufficient repair in functioning of metabolic pathways, leads apoptosis. The endoplasmic reticulum, ER, membrane allows molecules to be selectively processed and transferred inside and outside of the cell though double-layered nuclear envelope, with the help of a pipeline between the nucleus and the cytoplasm, as well as its close association with nucleus to have a check on ribosomal translation through, a several-step process, for maintaining cellular health. Consequently, to penetrate ER equipped with such highly specific qualities, there is need to architecture and tailor of such a refined and accurate healing procedure will work selectively, effectively and precisely: molecule-by-molecule and atomby-atom [1]. For the discovery of molecular machinery capable to do repair at cellular level, an engineered architecturing and well-designed tailoring methodology must applied strategically for such task by implementing research experiences of interdisciplinary areas i.e. Drug Design and Synthesis, Cell Transport Mechanism, Nanomedicine, Molecular Modeling, Computational (Chemistry, Nanotechnology, and Spectroscopy), Atmospheric Stress, Apoptotic Pathways and Mitochondrial Involvement, DNA Damage Pathway, Toxicology, and Clinical Pharmacology). Theoretically designed machines, nanorobots, are quite feasible and will perform with the ability of repair molecule-by-molecule or atom-by-atom in cells wherein metabolic proceedings are not proper by any means. Molecules have a size, a shape, a fairly well-defined surface, and mechanical properties with the quality of natural progression which are helpful in designing, architecting and tailoring of molecular machines as smart materials [2]. The use of highly specific characterization technologies i.e. computational spectroscopy, Single-molecule localization microscopy, atomic spectroscopy: molecular spectroscopy, absorption spectroscopy and emission spectroscopy will play a key role in architecturing and tailoring of molecular machinery [3]. In nature, such molecular machinery within the natural cells persist with capacity to repair damaged cell organelles, rebuilt it, formed new cell and reassembled them. With the deeper understanding of such natural systems, feasibility of new machinery may tested with urgent efforts for designing, architecting and tailoring such frameworks particularly with the capability to repairing cells as molecule-bymolecule or atom-by-atom as demanded by cell repair and matched with necessities. Our efforts will fruitful to design new avenues after the exploitation of all resources where architecting, tailoring and manufacturing of such nano-robots will possible practically [4]. By using interdisciplinary findings, it will be much easier task to sketch the outlines of such machinery with all the capabilities operate able as per the need at molecular level with prospect of understanding of mitochondrial dynamics as living things do [5]. Then, a perfect healing methodology, working decently through molecule-by-molecule or atom-by-atom, as cell repairing mechanism will be feasible, this newly discovered approach will lead to get a breakthrough as assumed and capable to do a half-decent job by taking reactive molecules or atoms, and bringing them up to a surface in a controlled way to perform, with the addition option of making a change in it whenever and wherever required. Molecular machines will be able to sense molecular level and decide, which cell needs repair or not featuring with surgical control by remotic or magnetic regulator, molecule-by-molecule and atom-by-atom, finally, it will be a histrionic and notable breakthrough in area of medicine discovery [6-10]. Designing, architecting and tailoring of molecular machinery, with the ability to distinguish between healthy and damaged cell, is need of hour having no repercussion and with capacity of targeting effected cells or sites only selectively, effectively and precisely, developed as nano-robots, will attain great degree of understanding for cell repair or to regulate metabolic processes perfectly with controlling and diagnostics ability in-built within nano-robotic machinery which will be able to cure any disease; do repair cell; regulate normal metabolic process; control biologically originated disturbances and defects originated by any environmental factors or as a result of transcriptional mechanisms. Curing, not just alleviating, disease has always been a difficult task by any ways; the tools required for diagnosis, and knowledge of medicine which may effectively implemented to repair the affected parts or a cell. Nano-robots if designed accurately can repair at cellular level and will revolutionize the field of medicine, this may become a reality in near future.

Biologically Effective Dose (BED) or Radiation Biological Effect (RBEf)?

The current radiosensitive studies are described with linear-quadratic (LQ) cell survival (S) model for one fraction with a dose d. As result of assuming all sublethally damaged cells (SLDCs) are completely repaired during the interfractions, that is, no presence of SLDCs, the survived cells are calculated for a n-fractionated regimen with the LQ S(n,D) model. A mathematically processed subpart of LQS(n,D) is the biologically effective dose (BED) that is used for evaluating a so-called “biological dose.” The interactions of ionizing radiation with a living tissue can produce partial death or sublethal damage from healthy or sublethally damaged cells. The proportions of the killed and sub-lethally damaged cells define the radiation biological effects (RBEfs). Computational simulations using RBEFs for fractionated regimens let calculating tumor control probability. While the derivation of the LQ S(n,D) considers a 100% cell repair, that is, 0% of sublethally damaged cells (SLDCs), the radiobiological simulators take into account the presence of SLDCs, as well as a cell repair <100% during the interfractions and interruption. Given “biological dose” does not exist, but RBEf, there was need for creating the BED. It is shown how some uses of BED, like the derivation of EQ2D expression, can be done directly with the LQ S(n,D).

Effects of Combine Exercise on HSP70 and SOD1 Expression of Aorta, Skeletal Muscle and Myocardium in High Fat Diet induced Obese Aging Rats

PURPOSE: Exercise improve myocardial cell protection and vascular function through cell repair and suppression of oxidative stress in cardiovascular diseases caused by aging. This study aimed to investigate the effect of combine exercise on HSP70 and SOD1 protein expression of aorta, skeletal muscle and myocardium in high fat diet induced obese aging rats.METHODS: Male 50-week-old Sprague Dawley rats (n=40) were divided into normal diet (ND, n=10), normal diet+exercise (NDEx, n=10), high fat diet (HFD, n=10), and high fat diet+exercise (HFDEx, n=10) groups. After six weeks on a high fat diet to induce obesity, a 12-week combine exercise program was implemented, which combine exercise (treadmill running+ladder climbing) three times a week for 45 minutes per session.RESULTS: Body weight was significantly decreased after 12 weeks combine exercise program compared to the ND group (p<.05) and HFDEx group compared to the HFD group (p<.05), respectively. After completing the 12-week exercise program, heat shock protein 70 (HSP70) and superoxide dismutase 1 (SOD1) expressions were significantly (p<.05) higher in the NDEx group compared to the ND group in the myocardium. Also, SOD1 protein expression was significantly (p<.05) higher in the NDEx group compared to the ND group and HFDEx group compared to the HFD group in the skeletal muscle.CONCLUSIONS: In conclusion, combine exercise intervention of high fat diet-induced obesity resulted in decreased cell repair protein and antioxidant enzyme protein in the myocardium. Therefore, it is thought that combine exercise intervention for obese induced rats improved the cell repair protein and antioxidant enzyme activity of the myocardium.