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SiPiezo1 or scRNA immortalised MSC cell line (Y201) cultured on stiff hydrogels

ABSTRACT: Mechanosensitive ion channels have emerged as fundamental proteins in sensing extracellular matrix (ECM) mechanics. Among those, Piezo1 has been proposed as a key mechanosensor in cells. However, whether and how Piezo1 senses time-dependent ECM mechanical properties (i.e., viscoelasticity) remains unknown. To address this question, we combined an immortalised mesenchymal stem cell (MSC) line with adjustable Piezo1 expression with soft (400 Pa) and stiff (25 kPa) viscoelastic hydrogels with independently tuneable Young’s modulus and stress relaxation. Here, we propose that Piezo1 is an important sensor of stiffness at this range (25kPa) consistent with the molecular clutch model. By performing RNA sequencing (RNA-seq), we identified the transcriptomic phenotype of MSCs response to matrix viscoelasticity and Piezo1 activity, highlighting gene signatures that drive MSCs mechanobiology at this elasticity scale.

ORGANISM(S): Homo sapiens

PROVIDER: GSE288423 | GEO | 2025/08/20

REPOSITORIES: GEO

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siPiezo1 or scRNA immortalised MSC cell line (Y201) cultured on soft hydrogels

Project description:Mechanosensitive ion channels have emerged as fundamental proteins in sensing extracellular matrix (ECM) mechanics. Among those, Piezo1 has been proposed as a key mechanosensor in cells. However, whether and how Piezo1 senses time-dependent ECM mechanical properties (i.e., viscoelasticity) remains unknown. To address this question, we combined an immortalised mesenchymal stem cell (MSC) line with adjustable Piezo1 expression with soft (0.4 kPa) and stiff (25 kPa) viscoelastic hydrogels with independently tuneable Young’s modulus and stress relaxation. Here, we propose that Piezo1 is an important sensor of stiffness at this range (25kPa) consistent with the molecular clutch model. By performing RNA sequencing (RNA-seq), we identified the transcriptomic phenotype of MSCs response to matrix viscoelasticity and Piezo1 activity, highlighting gene signatures that drive MSCs mechanobiology at this elasticity scale.

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Next-generation sequencing facilitates quantitative analysis of rat BMSCs in soft or stiff SA hydrogel

Project description:Purpose: To identify genes and the molecular pathways involved in the MSCs response to extracellular matrix stiffness, we performed RNA-sequencing of MSCs which cultured in soft (2 kPa) and stiff (18 kPa) SA hydrogels. Methods: mRNA profiles of MSCs cultured in soft (2 kPa) and stiff (18 kPa) SA hydrogel for 48 h were generated by deep sequencing, in quadruplicate, using Illumina HiSeq 2000. Results: Using an optimized data analysis workflow, we identified 33950 transcripts in MSCs with BWA workflow. Conclusions: Our results present the detailed analysis of MSCs transcriptomes cultured in soft (2 kPa) and stiff (18 kPa) matrix, and found that matrix stiffness dominated multiple mRNA pathways in MSCs.

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