Background: Activation of bone morphogenetic protein 4 (BMP4) signaling pathway in embryonic stem (ES) cells plays an important role in controlling cell proliferation, differentiation, and apoptosis. Adverse effects of BMP4 occur in a time dependent manner; however, little is known about the effect of different time exposure of this growth factor on cell number in culture media. In this study, ...

Exosomes, as a mediator of cell-to-cell transfer of genetic information, act an important role in intercommunication between tumor cells and their niche including fibroblasts, endothelial cells, adipocytes and monocytes. Several studies have shown that tumor cells can influence their neighboring cells by releasing exosomes. These exosomes provide signaling cues for stimulation, activation, prol...

introduction: carbon nanotubes (cnts) have shown enormous potential in neuroscience. nerve growth factor (ngf)-cnts complex promotes the neuronal growth, however, the underlying mechanism(s) have remained elusive. based on the interplay between ngf and the endocannabinoid system, involvement of the neuroprotective endocannabinoid, 2-arachidonoyl glycerol (2-ag), was investigated in the mechanis...

introduction: atherosclerosis, hypertension, ischemic diseases, alzheimer’s disease, parkinson disease, cancer and inflammation emerge from imbalance between antioxidant and oxidants. cancer is a most important public health problem in both developed and developing countries. natural antioxidants such as polyphenols are being used for prevention and treatment cancer. polyphenols include phenoli...

The primary cilium, a microtubule based organelle protruding from the cell surface and acting as an antenna in multiple signaling pathways, takes center stage formation of cerebral cortex, part brain that performs highly complex neural tasks confers humans with their unique cognitive capabilities. These activities require dozens different types neurons are interconnected ways. Due to this compl...

Abstract Roots provide the plant with water and nutrients anchor it in a substrate. Root development is controlled by hormones various sets of transcription factors. Recently, small peptides their cognate receptors have been identified as controlling root development. Small bind to membrane-localized receptor-like kinases, inducing dimerization co-receptor proteins for signaling activation givi...

knowledge about the clinical significance of v-raf murine sarcoma viral oncogene homolog b1 ( braf ) mutations in colorectal cancer (crc) is growing. braf encodes a protein kinase involved with intracellular signaling and cell division. the gene product is a downstream effector of kirsten ras 1( kras ) within the ras/raf/mapk cellular signaling pathway. evidence suggests that braf mutations, li...

materials and methods an oligogearray® (an oligonucleotide-based gene expression array platform) containing 126 wnt signaling pathway-related genes was used to compare gene expressions between primary hcc and adjacent non-tumorous liver tissues from 10 patients with hcc. selected differential genes were identified with real-time rt-pcr and immunohistochemistry (ihc). in particular, the protein ...

The Golgi apparatus is an essential organelle of the secretory pathway in eukaryotic cells. It processes and transmembrane proteins orchestrates their transport to other endomembrane compartments or plasma membrane. thereby shapes cell surface, controlling polarity, cell-cell communication, immune signaling. cytosolic face hosts regulates signaling cascades, impacting most notably DNA damage re...

The conserved family of Hedgehog (Hh) signaling proteins plays a key role in cell–cell communication development, tissue repair, and cancer progression, inducing distinct concentration-dependent responses target cells located at short long distances. One simple mechanism for distance dispersal the lipid modified Hh is direct contact between cell membranes through filopodia-like structures known...