Table II. Chronological order of mechanisms required during the development of adhesion in paired Ecad cells.
Time (min)
|
0–0.5
|
0.5–4
|
4–30
|
30+
|
||
---|---|---|---|---|---|---|
Molecular manipulation or drug treatment |
Effects | First phase of adhesion |
Second phase of adhesion |
Third phase of adhesion |
||
Deletion of E-cadherin cytoplasmic domain | No interaction with cytoplasmic partners | − | + | + | + | |
Without calcium anti-cadherin antibody | Nonfunctional cadherins | + | + | + | + | |
E-cadherin–α-catenin chimera | Direct interaction with the actin cytoskeleton |
− | − | − | − | |
Latrunculin | Inhibition of actin polymerization | − | + | + | + | |
Jasplakinolide | Aggregation/ polymerization of actin | |||||
Brefeldin A | Inhibition of vesicular transport | − | − | − | nd | |
Actin network organizationand membrane dynamics | ||||||
Cdc42DN/RacDN | Inhibition of filopodia/ lamellipodia and membrane ruffles | − | − | + | nd | |
Cdc42DA/RacDA | Stimulation of filopodia/ lamellipodia and membrane ruffles | + | + | + | + | |
RhoDN/RhoDA | Inhibition/induction of stress fibers; cell contractility | − | − | − | − | |
E-cadherin | E-cadherin | E-cadherin | E-cadherin | |||
Dependency | Actin polymerization |
Actin polymerization |
||||
Actin remodelling through Rac/Cdc42 activation |
Actin dynamics | |||||
Membrane dynamics |
Membrane dynamics |
Membrane dynamics |
+, sensitive.
−, insensitive.
nd, not done.