Results 111 to 120 of about 52,438 (267)

The checkpoint delaying anaphase in response to chromosome monoorientation is mediated by an inhibitory signal produced by unattached kinetochores

open access: yesJournal of Cell Biology, 1995
During mitosis in Ptk1 cells anaphase is not initiated until, on average, 23 +/- 1 min after the last monooriented chromosome acquires a bipolar attachment to the spindle--an event that may require 3 h (Rieder, C. L., A. Schultz, R. W.
C. Rieder   +3 more
semanticscholar   +1 more source

Impacts of Inorganic Arsenic Exposure on Genetic Stability of Human Mesenchymal Stromal Cells

open access: yesJournal of Applied Toxicology, Volume 45, Issue 8, Page 1555-1571, August 2025.
ABSTRACT Human mesenchymal stem/stromal cells (hMSCs) can differentiate into mesoderm‐type cells, making them suitable candidates for tissue repair therapies. However, their relatively low frequency in adult tissue necessitates ex vivo expansion prior to regenerative medicine applications, and therefore, long‐term hMSC genetic stability during ...
Marc A. Beal   +11 more
wiley   +1 more source

Strong Signatures of Selection on Candidate Genes Underlying Core Speciation Mechanisms in Desert Tortoises

open access: yesMolecular Ecology Resources, Volume 25, Issue 6, August 2025.
ABSTRACT Genomic incompatibilities and differential ecological adaptation are thought to be fundamental mechanisms of speciation. In this study, we generated a chromosome‐scale reference genome and annotation for Gopherus morafkai , the Sonoran Desert tortoise, and conducted a detailed analysis of genes under positive selection with its sister species,
Sarah M. Baty   +6 more
wiley   +1 more source

PP2A Promotes the Symmetric Division of MUC1‐Dominant Cancer Stem‐Like Cells in Small Cell Lung Cancer

open access: yesAdvanced Science, Volume 12, Issue 25, July 3, 2025.
During the G2/M phase, mucin1 (MUC1) activates protein phosphatase 2A (PP2A), leading to reduced phosphorylation of protein kinase C ζ (PKCζ) and NUMB, which promotes symmetric division and expansion of cancer stem‐like cells (CSLCs), thereby driving tumorigenesis. Combined inhibition of the MUC1–PP2A axis using LB100/GO203 with etoposide restores PKCζ
Shengze Li   +15 more
wiley   +1 more source

The checkpoint protein MAD2 and the mitotic regulator CDC20 form a ternary complex with the anaphase-promoting complex to control anaphase initiation.

open access: yesGenes & Development, 1998
The spindle assembly checkpoint mechanism delays anaphase initiation until all chromosomes are aligned at the metaphase plate. Activation of the anaphase-promoting complex (APC) by binding of CDC20 and CDH1 is required for exit from mitosis, and APC has ...
G. Fang   +3 more
semanticscholar   +1 more source

Efficacy of Haloxyfop‐R‐Methyl on Allium cepa: Cyto‐Genotoxic and In Silico Docking Studies on the Mechanism of Action

open access: yesMicroscopy Research and Technique, Volume 88, Issue 7, Page 2048-2062, July 2025.
ABSTRACT Haloxyfop‐R‐methyl (HRM) is extensively employed to control annual and perennial grass weeds. This study aimed to investigate the cyto‐genotoxic effects of HRM at concentrations of 1.19, 2.38, and 4.76 mg/L over various time intervals (24, 48, 72, and 96 h) on Allium cepa root.
Recep Liman   +4 more
wiley   +1 more source

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