These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Fibroblast spreading and phagocytosis: similar cell responses to different-sized substrata.
    Author: Grinnell F.
    Journal: J Cell Physiol; 1984 Apr; 119(1):58-64. PubMed ID: 6323490.
    Abstract:
    Experiments were carried out to test the hypothesis that cell spreading and phagocytosis are similar cell responses to different-sized substrata. The following morphological and biochemical studies provided evidence for this supposition. Cells phagocytosed 1.09-micron and 5.7-micron latex beads, but were unable to completely ingest 15.8-micron or 25.7-micron beads. With the larger beads, the cells spread around the bead surfaces with an appearance typical of cells spread on culture dishes. Biochemical studies with cytochalasin D, azide, and iodoacetate, as well as temperature-dependence studies, demonstrated similar responses of cell spreading and phagocytosis to these treatments. Similar cell surface receptors were involved in cell spreading and phagocytosis based upon experiments using antibodies to baby hamster kidney (BHK) cell wheat germ agglutinin receptors. And finally, BHK cell variants with defective plasma fibronectin (pFN) receptors were unable to spread on pFN-coated dishes or ingest pFN-coated beads. Evidence also is presented concerning the "contact" process in cell adhesion. It was found that azide and low temperature inhibited cell attachment per se but did not block fibronectin-receptor interactions based upon cell binding of pFN-coated beads. A possible explanation for the contact process is presented based upon the resistance of cells and beads to shear forces.
    [Abstract] [Full Text] [Related] [New Search]