Preprint

PUBDB-2024-08043

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Nuclear pores as conduits for fluid flow during osmotic stress

Hoffmann, P. C. ; Kim, H. ; Obarska-Kosinska, A. ; Kreysing, J. P. ; Andino-Frydman, E. ; Cruz-Leon, S. ; Cernikova, L. ; Kosinski, J. ; Turoňová, B. ; Hummer, G. (Corresponding author) ; Beck, M. (Corresponding author)

2024

This record in other databases:    

Please use a persistent id in citations: doi:10.1101/2024.01.17.575985

Abstract: Changing environmental conditions necessitate an immediate cellular adaptation to ensure survival. Dictyostelium discoideum, a bacteriovore slime mold present in the soil of most terrestrial ecosystems, is known for its ability to tolerate drastic changes in osmolarity. How the cells cope with the resulting mechanical stress remains understudied. Here we show that D. discoideum has extraordinarily elaborate and resilient nuclear pores that serve as conduits for massive fluid exchange between cytosol and nucleus. We capitalize on the unique properties of D. discoideum cells to quantify flow across the nuclear envelope that is necessitated by changing nuclear size in response to osmotic stress. Based on mathematical concepts adapted from hydrodynamics, we conceptualize this phenomenon as porous flow across nuclear pores. This type of fluid flow is distinct from the canonically characterized modes of nucleocytoplasmic transport, i.e. passive diffusion and active nuclear transport, because of its dependence on pressure. Our insights are relevant in any biological condition that necessitates rapid nuclear size changes, which includes metastasizing cancer cells squeezing through constrictions, migrating cells and differentiating tissues.

---

Contributing Institute(s):

1. CSSB-EMBL-JK (CSSB-EMBL-JK)

Research Program(s):

1. 899 - ohne Topic (POF4-899) (POF4-899)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2024

---

Database coverage:
Published

---

---

Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Hoffmann, P. C. ; Kim, H. ; Obarska-Kosinska, A. ; Kreysing, J. P. ; Andino-Frydman, E. ; Cruz-León, S. ; Margiotta, E. ; Cernikova, L.Extern*CSSB* ; Kosinski, J.CSSB* ; Turoňová, B. ; Hummer, G. (Corresponding author) ; Beck, M. (Corresponding author)
Nuclear pore permeability and fluid flow are modulated by its dilation state
Molecular cell 85(3), 537 - 554.e11 (2025) [10.1016/j.molcel.2024.11.038]2025     Files BibTeX | EndNote: XML, Text | RIS

---