Words similar to cell-cell
Example sentences for: cell-cell
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It is generally accepted that the driving force for cell movement is provided by the dynamic reorganization of the actin cytoskeleton, directing protrusion (lamellipodia and filopodia) at the front of the cell and retraction at the rear [ 30 31 ] . Although we have not examined the ultrastructure of the dermal fibroblasts at the edge of wound sites, we showed previously by electron microscopy that in the lens of SPARC-null mice numerous cellular processes extended into the ECM of the lens capsule [ 23 ] . We further showed that, in contrast to the abnormal filopodial projections at the lens cell-ECM interface, cell-cell contacts between the neighboring lens epithelial cells and between the lens epithelial and fiber cells were normal [ 23 ] . The results indicate that disassembly of cell-cell contacts between lens cells is not taking place, despite the forward movement of the lens cells into the ECM of the capsule.
The following results of this study suggest that HIV-1 expression leads to cyclin D 1 -mediated G 1 → S progression in infected podocytes: cyclin D 1 transcript and protein levels are markedly up-regulated, phospho-Rb (Ser780) levels are increased, cyclin D 1 protein and phospho-Rb (Ser780) levels do not decrease with podocyte cell-cell contact and differentiation, and the up-regulation of cyclin D 1 requires the expression of HIV-1 genes, particularly HIV-1 nef.
In contrast, cell-cell contact in wild-type and control-infected, but not HIV-1-infected podocytes, caused a severe down-regulation of cyclin D 1 transcript and protein concomitant with the up-regulation of synaptopodin, a podocyte differentiation marker [ 7 28 ] , by the end of the 14-day differentiation period.
Previously, SPARC has been shown to regulate cell-cell contact through tyrosine phosphorylation of adherens junction proteins [ 32 ] . Electron microscopy of the SPARC-null dermal fibroblasts at wound sites should not only confirm the role of SPARC in cell motility but also reveal how SPARC mediates cell-ECM and cell-cell interactions to promote cell motility.
Many genes encoding components of the extracellular matrix, proteins important in cell-cell interactions and cytoskeletal proteins were regulated in response to R1881, suggesting that they may participate in the morphologic changes induced by androgens (Figure 6a,6b).
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