Role of Cell-Mediated Enzymatic Degradation and Cytoskeletal Tension on Dynamic Changes in the Rheology of the Pericellular Region Prior to Human Mesenchymal Stem Cell Motility.

ABSTRACT: Human mesenchymal stem cells (hMSCs) are encapsulated in synthetic matrix metalloproteinase (MMP) degradable poly(ethylene glycol)-peptide hydrogels to characterize cell-mediated degradation of the pericellular region using multiple particle tracking microrheology. The hydrogel scaffold is degraded by cell-secreted enzymes and cytoskeletal tension. We determine that cell-secreted enzymatic degradation is the main contributor to changes in the pericellular region, with cytoskeletal tension playing a minimal role. Measured degradation profiles for untreated and myosin II inhibited hMSCs have the highest cross-link density around the cell. We hypothesize that cells are also secreting tissue inhibitor of metalloproteinases (TIMPs) to inhibit MMPs, which allow cell spreading and attachment prio

SUBMITTER: Daviran M 

PROVIDER: S-EPMC5977993 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature