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MMP14 knockdown at U87 brain tumor cells.Analyse of the genes responsible for cell division

ABSTRACT: Compared to the Scramble U87 cells, MMP14 ablation induces G2M arrest

ORGANISM(S): Homo sapiens

PROVIDER: GSE45294 | GEO | 2013/03/19

SECONDARY ACCESSION(S): PRJNA193425

REPOSITORIES: GEO

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MMP14 knockdown at U87 brain tumor cells.Analyse of the genes responsible for cell division

Project description:Compared to the Scramble U87 cells, MMP14 ablation induces G2M arrest SABioscience Cell cycle platform, human genes. U87 cells were infected separately with eithr lentivirus carry on Scramble or sh RNA against human MMP14 gene.Equla amount of mRNA was isolated prior RT-PCR analyses

2013-03-19 | E-GEOD-45294 | biostudies-arrayexpress

MMP14 knockdown at U87 brain tumor cells.Analyse of the genes responsible for cell division

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Expression array of stromal Mmp14-targeted mammary glands

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RNA-seq Analysis of U87: Ctrl, U87:EGFR, U87:EGFRvIII, U87:EGFR+EGFRvIII and U87:EGFR+EGFRvIII KRAS KO

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Mmp14 is essential for circadian clock rhythmicity in fibroblasts

Project description:Membrane type I-matrix metalloproteinase (MT1-MMP/Mmp14) is an unusual MMP because it is essential for survival in mice with multiple organ systems being affected for reasons that are unclear. Here, we show that the protein (MT1-MMP) and gene (Mmp14) are under strict circadian clock control and conditional knockout in fibroblasts leads to ~16% of the proteome losing or inverting circadian rhythmicity. The result is loss of the actin cytoskeleton and cell-matrix adhesions and major imbalance of the matrisome. Lack of collagen-I monomer turnover results in excess fibril formation in the absence of Mmp14. In the absence of Mmp14, paired-like homeodomain transcription factor 2 (Pitx2) is upregulated and remains in the nucleus where it drives Plod2 expression. The overall result is accumulation of collagen fibrils and elevated pyridinoline crosslinking that renders collagen fibrils insoluble. In conclusion, Mmp14 is a master regulator of circadian rhythms affecting the actin cytoskeleton and cell microenvironment.

2023-10-31 | PXD031692 | Pride

Mmp14-Dependent Remodeling of the Pericellular-Dermal Collagen Interface Governs Fibroblast Survival

Project description:Dermal fibroblasts deposit type I collagen, the dominant extracellular matrix molecule found in skin, during early postnatal development. Coincident with this biosynthetic program, fibroblasts proteolytically remodel pericellular collagen fibrils by mobilizing the membrane-anchored matrix metalloproteinase, Mmp14. Unexpectedly, dermal fibroblasts in Mmp14-/- mice commit to a large-scale apoptotic program that leaves skin tissues replete with dying cells. A requirement for Mmp14 in dermal fibroblast survival is recapitulated in vitro when cells are embedded within, but not cultured atop, 3-dimensional hydrogels of cross-linked type I collagen. In the absence of Mmp14-dependent pericellular proteolysis, dermal fibroblasts fail to trigger β1 integrin activation and instead actuate a TGF-β1/phospho-JNK stress response that leads to apoptotic cell death in vitro as well as in vivo. Taken together, these studies identify Mmp14 as a requisite cell survival factor that maintains dermal fibroblast viability in postnatal dermal tissues.

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Project description:Bone homeostasis is regulated by hormones such as parathyroid hormone (PTH). While PTH can stimulate osteo-progenitor expansion and bone synthesis, how the PTH-signaling intensity in progenitors is controlled is unclear. Endochondral bone osteoblasts arise from perichondrium-derived osteoprogenitors and hypertrophic chondrocytes (HC). We found, via single-cell transcriptomics, HC descendent cells activate membrane-type 1 metalloproteinase 14 (MMP14) and the PTH pathway as they transition to osteoblasts in neonatal and adult mice. Unlike Mmp14 global knockouts, postnatal day 10 (p10) HC lineage-specific Mmp14 null mutants (Mmp14ΔHC) produce more bone. Mechanistically, MMP14 cleaves the extracellular domain of PTH1R, dampening PTH signaling, and consistent with the implied regulatory role, in Mmp14ΔHC mutants, PTH signaling is enhanced. We found HC-derived osteoblasts contribute ~50% of osteogenesis promoted by treatment with PTH 1-34 and this response was amplified in Mmp14ΔHC. MMP14 control of PTH signaling likely applies also to both HC- and non-HC-derived osteoblasts because their transcriptomes are highly similar. Our study identifies a novel paradigm of MMP14 activity-mediated modulation of PTH signaling in the osteoblast lineage, contributing new insights into bone metabolism with therapeutic significance for bone-wasting diseases.

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RNA-seq Analysis of U87: Ctrl, U87:EGFR, U87:EGFRvIII, U87:EGFR+EGFRvIII and U87:EGFR+EGFRvIII KRAS KO

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