Kinesin-14 HSET may not oppose kinesin-5 Eg5 activity in RPE-1 cells.
Journal
microPublication biology
ISSN: 2578-9430
Titre abrégé: MicroPubl Biol
Pays: United States
ID NLM: 101759238
Informations de publication
Date de publication:
2022
2022
Historique:
received:
16
05
2022
revised:
03
08
2022
accepted:
06
08
2022
entrez:
25
8
2022
pubmed:
26
8
2022
medline:
26
8
2022
Statut:
epublish
Résumé
Human retinal pigment epithelium RPE-1 cells are immortalized diploid wild-type cells. RPE-1 is increasingly used for studies of spindle assembly dynamics and chromosome segregation. Here, we imaged living RPE-1 cells using the spinning disk confocal microscope and report their complete spindle assembly dynamic parameters. Live-cell experiments enabled ascribing precise timing of function of the kinesin-5 Eg5 and kinesin-14 HSET throughout different phases of mitosis. Eg5 functions at prophase and metaphase, to assemble and maintain spindle bipolarity, respectively. Eg5 inhibition results in spindle collapse during prophase and metaphase, resulting in monoastral/monopolar spindles. HSET functions throughout mitosis to maintain spindle length. HSET degradation results in shorter spindles through all phases of mitosis. Double-inhibition of Eg5 and HSET produces only monoastral/monopolar spindles, indicating that Eg5 and HSET may not be antagonistic in wild-type RPE-1 cells, contrary to previous studies using cancer cells. In the context of spindle assembly, our results highlight potential important differences between RPE-1 and other cancer-derived cell lines.
Identifiants
pubmed: 36004005
doi: 10.17912/micropub.biology.000623
pmc: PMC9393730
doi:
Types de publication
Journal Article
Langues
eng
Informations de copyright
Copyright: © 2022 by the authors.
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