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alicefrolov.bsky.social
Divergent Molecular Trajectories During Senescence Establishment

I am sharing a data visualization examining the temporal heterogeneity of senescence entry across distinct pro-senescent triggers.

#CellularSenescence #Fibroblasts #SASP #CellCycleArrest #DataVisualization
Divergent Molecular Trajectories During Senescence Establishment I am sharing a data visualization examining the temporal heterogeneity of senescence entry across distinct pro-senescent triggers. The figure, subtitled "Simulated time-course of key senescence markers following distinct pro-senescent stimuli in human fibroblasts (WI-38)," presents a multiline plot tracking the induction kinetics of canonical markers over a defined post-stimulus interval. I want to state explicitly that the data depicted are simulated. The trajectories do not derive from a single empirical dataset but are constructed to illustrate a literature-grounded trend regarding the mechanistic divergence of senescence programs. The intent is heuristic: to render comparable the temporal signatures reported across independent studies. The plot contrasts three canonical inducers: replicative exhaustion (telomere attrition), oncogene-induced senescence (OIS, e.g. HRAS-G12V), and genotoxic stress (ionizing radiation or bleomycin). Marker trajectories include p16INK4a accumulation, p21CIP1 transient dynamics, SA-beta-galactosidase activity, and SASP-associated transcripts (IL-6, IL-8). Several mechanistically salient patterns emerge. Genotoxic and oncogenic triggers exhibit early, pronounced p21CIP1 induction downstream of ATM/ATR-p53 signaling, followed by comparatively delayed p16INK4a reinforcement consolidating the arrest. Replicative senescence displays a more gradual, protracted ascent consistent with progressive telomere shortening rather than an acute DNA damage bolus. SASP marker onset is temporally uncoupled from initial cell-cycle arrest, reflecting the established latency governed by NF-kB and the C/EBP-beta axis. The central point is that "senescence" comprises trigger-dependent kinetic trajectories rather than a monolithic terminal state, with implications for marker selection and sampling windows in experimental design.
July 30, 2026 at 5:00 PM
arxivlens.bsky.social
Cell Cycle Arrest of a "Zippering" Epithelial Cell Cluster Shapes the Face and is Disrupted in Craniofacial Disorders
Adameyko, I., Chacon, B. H. et al.
Paper
Details
#CellCycleArrest #CraniofacialDevelopment #EpithelialClusteringDisorders
July 31, 2025 at 4:01 PM
mol-biomed.bsky.social
#Research
Matricellular protein #SMOC2 safeguards tubular integrity in acute #kidney injury via integrin β3-dependent inhibition of #CCND1-#CDK4/6 axis doi.org/10.1186/s435...
Researchers from University of Montreal

#SMOC2 #AcuteTubularInjury #RenalFibrosis #CellCycleArrest
Matricellular protein SMOC2 safeguards tubular integrity in acute kidney injury via integrin β3-dependent inhibition of CCND1-CDK4/6 axis - Molecular Biomedicine
Tubular injury during acute kidney injury (AKI) is a major determinant of chronic kidney disease (CKD) progression, yet the molecular mechanisms underlying tubular protection remain incompletely under...
doi.org
March 20, 2026 at 6:11 AM
mol-biomed.bsky.social
#Research
Matricellular protein #SMOC2 safeguards tubular integrity in acute #kidney #injury via integrin β3-dependent inhibition of #CCND1-#CDK4/6 axis doi.org/10.1186/s435...

#CellCycleArrest #DNAdamage #RenalFibrosis
February 28, 2026 at 5:54 AM