Project description:Response of mouse mammary epithelial cells to treatment with MMP3 Cells were untreated (d1 control) or treated with MMP3 for 1-4 days (d1-4 MMP3), or washed and then allowed to recover for three additional days (d5-7 recover) then isolated for RNA.
Project description:Response of pancreas cancer cells to treatment with recombinant MMP3 Cells were treated with 100U/ml MMP3 for 4 days, then isolated for RNA. The submitted experiments represent two different experiments performed at different times
Project description:Mammary gland branching morphogenesis is thought to relie on the mobilization of the membrane-anchored matrix metalloproteinase, Mmp14/MT1-MMP, to drive mammary epithelial invasion by remodeling the extracellular matrix and triggering associated signaling cascades. However, the roles that this proteinase plays during postnatal mammary gland development in vivo remain undefined. A mammary gland branching program that occurs during the first 4 weeks of postnatal mouse development, in tandem with recently developed Mmp14-floxed mice and MMTV-Cre transgenics that express Cre recombinase throughout the mammary epithelial cell compartment, were used to characterize the impact of deleting epithelial cell Mmp14 on mammary gland morphogenesis. Transcriptome profiling of mammary epithelial cells was used to investigate the functional roles of MT1-MMP in the postnatal mammary epithelial cell compartment in an unbiased fashion
Project description:Seventy percent of women with ovarian cancer develop resistance to cisplatin, contributing to persistently high mortality rates. Understanding the mechanisms behind this resistance is crucial for developing improved therapies. Matrix metalloproteinase 3 (MMP3) is elevated in ovarian cancer patients, but its role in cisplatin resistance remains underexplored. We observed significantly higher MMP3 protein and mRNA levels in cisplatin-resistant high-grade serous ovarian cancer (HGSOC) cells compared to cisplatin-sensitive cells, with further increases following cisplatin treatment. Kaplan‒Meier analysis indicated that patients with lower MMP3 levels have better survival outcomes. MMP3 knockdown via siRNA reduced cell viability, proliferation, and invasion, effects enhanced by cisplatin; however, a chemical MMP3 inhibitor did not replicate these effects. To better understand MMP3’s role, we conducted RNA sequencing to analyze gene expression changes and used immunoprecipitation with mass spectrometry to identify MMP3-interacting proteins, making this the first study to explore this in cisplatin-resistant ovarian cancer. Surprisingly, multiple injections of liposomal MMP3-siRNA increased tumor size in a mouse model, while combining MMP3-siRNA with cisplatin reduced tumor growth. These findings highlight MMP3’s complex role in cisplatin resistance and raise concerns about its targeting in vivo.