In agreement with our nutrigenomic results, a significant decreased adhesion of monocytes pre-exposed to MOF could be observed at the endothelial cells compared to control. The potential of grape seed extract to decrease adhesion of monocytes to HUVECs has been reported recently, however at concentrations ranging from 50 to 100 mg/ml. These concentrations are higher than the concentrations used in our study. Our results emphasize the capacity of grape seed– derived MOF to decrease the adhesion of immune cells to the vascular endothelium and potentially lower infiltration of these immune cells into the vascular wall, which is an initial step in atherosclerosis development. It has been reported that supplementation of the diet with catechin, a flavanol monomer present in MOF, results in lower atherosclerosis development in apolipoprotein E-deficient mice. It could be postulated that the regular consumption of MOF could decrease blood cell infiltration into the vasculature and potentially protect against atherosclerotic lesions in humans. Our bioinformatic data also revealed that over 30 differentially expressed genes are involved in different processes related to inflammation. The role of chronic inflammation in the promotion, initiation and development of chronic diseases, such as cancer, cardiovascular disease or osteoporosis has been described. In our study, among the differentially expressed genes involved in inflammatory processes is the gene coding for the proinflammatory cytokine IL2, of which the expression has been down-regulated by the MOF supplementation. Together with IL2, we also observed a decrease in the expression of a subunit of its receptor, the IL2RB gene. These inflammation-related genes, as well as some of the cell adhesion molecules, are regulated by the transcription factor NF-kB. Bioinformatic analyses of the nutrigenomic data identified several transcription factors potentially involved in the regulation of the expression of differentially expressed genes, among which is NF-kB. This suggests that NF-kB is a potential target by which MOF exert their anti-inflammatory effects in circulating blood cells. Interestingly, our nutrigenomic data also revealed an increase in the expression of the gene coding for NFKBIA, the endogenous inhibitor of NF-kB. A previous in vivo study in an atherosclerotic ApoE mouse model identified NF-kB as a major upstream regulator in leukocyte adhesion and transendothelial migration through the vascular endothelium. Moreover, NF-kB activity in peripheral blood mononuclear cells from smokers has been found to be significantly higher than in PBMCs from non-smokers. In order to corroborate a direct effect of MOF on NF-kB we performed NF-kB reporter gene studies in an inflammatory human monocyte/macrophage cell model. The experiments revealed a dose- and time-dependent repression of NF-kB luciferase expression in the presence of MOF.

A key inhibitor of osteoclast activity, osteoprotegrin, is normally enriched in the cochlea relative to other sites in the body. In mice, OPG is produced at high levels by fibrocytes within the spiral ligament and secreted in the perilymph. Mice deficient in OPG show excessive remodeling throughout the middle and inner ear resulting in severe hearing loss. While there are cases of FD causing sensorineural hearing loss in humans, it has been hypothesized that this is due to auditory neural compression from the FD bone changes. The results in our mouse model with FD like lesions would support that mechanism, as well as possibly physical changes to the ossicular chain, as opposed to pathologic changes of sensory structures as seen in such lesions as cochlear otosclerosis. These results point to a role for peri-lacunar remodeling in the cochlea that may be disrupted in FD. In conclusion, our results show that the cochlea is a unique bony structure characterized by limited bone turnover that confers protection from proliferative and metabolically active FD bony lesions. The invasive fibro-osseous lesions seen in this mouse model cause conductive hearing loss through involvement of the ossicular chain, in a manner very similar to that seen in humans. These mechanisms could be new pharmacologic targets to treat the skeletal or hearing manifestations of FD or other skeletal diseases. The vitrification process plays a key role in cryopreservation for the long term conservation of plant genetic resources. Vitrification is defined as a physical process by which a concentrated aqueous solution solidifies into a stable amorphous glass without the formation of ice crystals when the temperature is decreased. Vitrification of plant specimens can be achieved in many ways, including air drying of embryos, and more recently through the use of highly concentrated plant vitrification solutions that readily form glasses on cooling and inhibit crystallization. However, exposure to PVS must be controlled to enable sufficient cellular dehydration whilst limiting injury from chemical toxicity and establishment of a simple and high-throughput cryopreservation method using cryoprotectant is highly desirable. Plant vitrification solutions combine cryoprotectants that vary in permeability, such that cellular water is replaced, cell viscosity is increased and the freezing behaviour of the remaining water is altered. PVS2 is probably the most commonly used cryoprotectant for plant cells, tissues and embryos; for example, the cryopreservation of embryonic axes of citrus and in vitro shoot-tips of Parkia speciosa, a tropical species with recalcitrant seeds. The conventional approach to vitrification generally involves a tissue pre-culture step on sucrose-enriched medium, before cooling, with highly concentrated vitrification solution for a period that varies with species, tissue and temperature.

Signal during exposition with a quantitative imaging system, as these systems are often calibrated to stop the exposure process before the strongest signal on the membrane is outside the linear range of detection. We, therefore, recommend to mask the non-specific signal at 25 kDa, or to cut the membrane prior to incubation with secondary anti-LC antibodies, or to do incremental exposure to improve signal detection. We also tested all of the monoclonal antibodies within a heat stable fraction. This method is routinely used by many groups for Western blotting or to measure total tau after passive immunization, as this procedure very effectively removes any mouse Igs. The heat-stable procedure is based on the fact that tau is an extremely heat stable protein. Here, the non-specific signal seen in TKO mice was completely absent in the heat stable fraction, as expected. However, this technique also seems to decrease the overall tau signal and resolution on a Western blot, as evidenced by the observation that some antibodies failed to reveal all the bands of murine tau in the HS fraction. Furthermore, our results show that there is a significant fraction of tau lost into the pellet, and that this technique is not for studying proteins other than tau, such as kinases, as they were absent from the HS fraction. We further tested two others techniques to clear Igs. We took advantages of the capacity of protein G and Dynabeads to bind the fragment crystallizable region of mouse Igs in order to clear the samples of endogenous Igs. Results with cleared samples showed that the non-specific band in TKO mice was completely eliminated, further confirming that the non-specificity is due to mouse Igs. Both methods can be used to remove the nonspecificity but they involve significant modification of Western blot procedures and are more time-consuming than the simple replacement of secondary antibodies. Furthermore, it is possible that some proteins of interest could form a complex with protein G or Dynabeads and be discarded in the pellet. Finally, we tested some polyclonal antibodies and, as expected, our results indicate that these antibodies were not associated with specificity-related problems secondary to endogenous Igs. Nevertheless, in our study, some polyclonal antibodies, particularly the pS262 and pS409 antibodies, led to high non-specificity that obscured the tau signal detection. These antibodies displayed high non-specificity mainly due to their cross-reactivity with others proteins in the samples. While the HS treatment improved the phospho-tau signal of pS262, it did not for pS409. Indeed some studies have shown that pS409 is not phosphorylated in the human and rat adult brain, which could explain this problem with detection. In conclusion, this study provides evidence that both monoclonal and polyclonal antibodies can display non-specificity in mouse samples during Western blot analysis for tau protein.

These results are consistent with the concept that increasing intracellular LC-CoA levels leads to enhanced Ca2+ influx through TRPV1 channels. The potential significance of our findings to health and disease still remains to be comprehensively determined in future studies. However, it is important to speculate how this LC-Acyl CoA/ TRPV1 axis might contribute to both cellular function and dysfunction. Any alterations in Ca2+ signalling due to increased TRPV1 channel function could result in detrimental effects on a variety of cellular processes. For example, TRPV1 channel activation is thought to result in the secretion of substance P and calcitonin gene-related peptide that exert pro-inflammatory effects. Application of capsaicin concentrations that desensitize TRPV1 channels result in a decrease in pain and levels of these inflammatory peptides. TRPV1 antagonists are currently being developed to address a wide variety of diseases. Interestingly, low-grade inflammation is now thought to be a central component in the development of T2D diabetes, a disease in which fatty acid metabolism is perturbed. TRPV1 is also suggested to play a direct role in immune/inflammatory cell activation as TRPV1 channels are expressed in macrophages, dendritic cells and T-cells resulting in an increase in the levels of pro-inflammatory mediators including IL-1b, IL-6, IL-12 and TNF-a. Therefore any mechanism that leads to excessive TRPV1 channel activity may play a role in immune/inflammatory disorders. Given the potentially important role that inflammation plays in the etiology of obesity and metabolic disorders, excessive TRPV1 activity may be involved. Indeed, exposure of rodents to capsaicin-containing diet resulted in a leaner phenotype. In addition, WT mice fed a high fat diet weeks gained significantly more weight than TRPV1 knockout mice. TRPV1 knockout mice on a HFD also showed improved glucose tolerance compared to WT mice on a HFD. Collectively these findings suggest that excessive TRPV1 activation may be a contributing mechanism to the development of obesity and T2D. It is tempting to speculate that increased LC-CoA-mediated TRPV1 channel activation may occur via changes in fatty acid metabolism and transport observed in T2D and obesity where dietary consumption of saturated fatty acids is a contributory factor. In summary, our study reports a novel mechanism by which physiological concentrations of intracellular LC-CoA potently modulate TRPV1 channel via a mechanism similar, but not identical to PIP2. As many TRP family members are regulated by PIP2, our results reveal a metabolically-linked mechanism by which TRP channels activity may be regulated. This mechanism may contribute to the cellular dysfunction observed in immune/ inflammatory cell types in certain metabolic disorders that display altered fatty metabolism such as T2D and obesity. Further studies to test this concept are therefore warranted.

The effect of TALDO1 depletion on NADPH and GSH is discordant among various cells. Suppression of TALDO1 increases NADPH and GSH production and enhances oxidative stress in human Jurkat and H9 T cells, however; TALDO1 deficiency diminishes NADPH and GSH production in human lymphoblasts,. The upregulation of TALDO1 in CDPSCs may increase NADPH and GSH expression, which may contribute to protecting CDPSCs from oxidative damage. GLRX3, an essential binding protein, has been reported to play important roles in various signaling pathways including embryogenesis, immune cell response, the regulation of cardiac hypertrophy, cancer cell functions and iron homeostasis,. GLRX3 is necessary to protect cells against oxidative stress and GLRX3 deletion leads to embryonic lethality in mice. The pulp with deep caries is more likely to suffer from oxidative stress. The up-regulation of GLRX3 in CDPSCs may help protect them from being damaged by reactive oxygen species. APEH belongs to the prolyl oligopeptidase family of serine proteases. Previous studies have showed that APEH contributes to the elimination of the oxidized proteins in mammalian cells and in plants. APEH may be a potential regulator in sustaining the homeostasis of the cytoplasmic antioxidative system. The expression of APEH should be enhanced in CDPSCs, as dental pulp with deep caries is more susceptible to oxidized stress; however, our proteomic analysis showed opposite results. The antioxidative role of APEH in CDPSCs requires further investigation. HSP90AA1 is a highly conserved and abundant protein. It has been implicated in the activation of various proteins such as important mediators of signal transduction, cell cycle regulation, differentiation and pathogenic factors involved in tumor progression. Previous studies showed that HSP90AA1 played an important role in infectious disease by interacting with various bacterial and viral proteins. Moreover, HSP90AA1 is unregulated under elevated temperature. Two reasons may be accountable for the up-regulation of HSP90AA1 in CDPSCs. First, the by-products secreted by bacteria and viruses might enhance the expression level of HSP90AA1 in stem cells isolated from dental pulp undergoing stimulation from a deep carious lesion. Moreover, the fluctuating oral temperature may increase HSP90AA1 expression in CDPSCs, as dental pulp with deep caries is more vulnerable to temperature stimuli without sufficent hard dental tissue protection. Isocitrate dehydrogenase catalyzes the oxidative decarboxylation of isocitrate to form a-ketoglutarate. This process is considered to be one of the key enzymes in the tricarboxylic acid cycle. In mammals, there are three types of isoenzymes represented by cytosolic NADP-specific IDH, mitochondrial NADP-specific IDH, and mitochondrial NADspecific IDH.