Author

Andrew D. Countryman

Columbia UniversityORCID 0000-0002-0377-8075Unclaimed ORCID profile · follow to get notified of new preprints

Biology Disciplines

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Developmental Biology· 2 Cell Biology· 1

Signature Assays, Organisms & Methods

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Approach:experimental assay· 3 Organism:Drosophila· 2 Organism:C. elegans· 1 Research Focus:cell signaling & trafficking· 1

Frequent Co-Authors

Karen E. KaszaiD· 3 shared Benjamin LacroixiD· 1 shared Caroline A. Doherty· 1 shared Caroline Q. Connors· 1 shared Christian CupoiD· 1 shared J. Tristian WilesiD· 1 shared Julie C. CanmaniD· 1 shared Julien DumontiD· 1 shared

Activity by Year

2024-2025 · peak 2/yr

Co-Author Collaboration Network

10 top collaborators · 30 mutual co-author links

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3 shared papersDevelopmental Biology

Karen E. KaszaORCID

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3 papers

Recent·Most cited

Developmental BiologyNature CommunicationsPeer-reviewedAug 18, 2025

Endogenous OptoRhoGEFs reveal biophysical principles of epithelial tissue furrowing

Andrew D. Countryman, Caroline A. Doherty, R. Marisol Herrera-Perez, Karen E. Kasza

The paper uses optogenetic tools to control RhoGEF activity in Drosophila and reveals how RhoGEF recruitment affects tissue furrowing during development.

1 citation

Drosophilaexperimental assay

𝕏 PostBluesky

Developmental BiologyCurrent BiologyPeer-reviewedJul 15, 2024

E-cadherin tunes tissue mechanical behavior before and during morphogenetic tissue flows

Xun Wang, Christian Cupo, Sassan Ostvar…·Karen E. Kasza

This study investigates how E-cadherin-mediated adhesion affects mechanical behavior in Drosophila epithelial tissues before and during morphogenetic flows, revealing dual roles in tissue structure and dynamics.

13 citations

Drosophilaexperimental assay

𝕏 PostBluesky

Cell BiologyMolecular Biology of the CellPeer-reviewedMay 2, 2024

Germ fate determinants protect germ precursor cell division by restricting septin and anillin levels at the division plane

Caroline Q. Connors, Michael Sean Mauro, J. Tristian Wiles…·Julie C. Canman

The paper identifies PIE-1 and POS-1 as germ fate determinants that protect P2 germ precursor cells from cytokinesis failure by reducing septin and anillin levels at the division plane.

5 citations

C. elegansexperimental assay

𝕏 PostBluesky