Laurence Barbier

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About

Laurence Barbier is a cell biologist whose research has significantly advanced our understanding of the molecular mechanisms driving cancer cell invasion and metastasis. Her work centers on the specialized cellular protrusions, known as pseudopodia, that tumor cells use to navigate and degrade the extracellular matrix during invasion. In her landmark 2005 study, "Tumor Cell Pseudopodial Protrusions" (76 citations), Barbier developed an elegant purification method using 1-μm pore polycarbonate filters to isolate pseudopodial domains from Moloney sarcoma virus (MSV)-transformed MDCK invasive variant cells. This technique allowed her team to selectively separate the protrusions from the cell body, enabling the first detailed proteomic analysis of the pseudopodial compartment. Her findings revealed that these protrusions are enriched in phosphorylated proteins and signaling molecules critical for motility and invasion. Barbier’s methodological innovation has provided a foundational tool for subsequent studies on tumor cell migration, directly impacting our understanding of how cancer cells breach tissue barriers. Her work remains essential reading for researchers investigating the cytoskeletal dynamics and signaling pathways that underlie metastatic dissemination.