Project description:Transcriptome sequencing analysis of Hs578T control (CTRL sh) and CCN3 knockdown (CCN3 sh) cell lines. CCN3, also known as nephroblastoma overexpressed (NOV, NOVH), has been associated with cell migration, invasion, angiogenesis, adhesion and proliferation in several cancer types like Ewing’s sarcoma, glioma, prostate cancer, hepatocellular carcinoma, clear cell renal cell carcinoma, chondrosarcoma and melanoma. These results provide information about gene expression affected by CCN3 in triple-negative breast cancer cell lines.
Project description:Massive studies have been applied in exploring the factors driving pathogenesis, progression and metastasis of hepatocellular carcinoma. However these studies were inefficient in disclosing the fundamental mechanism which promotes hepatocellular carcinoma. Zinc and zinc-finger proteins have been important in extensive biological processes for human. Supervised machine learning using bootstrapping algorithm on GEO and TCGA transcriptome data for hepatocellular carcinoma identified zinc-finger like protein ZFPL1 as potential hepatocellular carcinoma driver. Further studies validated ZFPL1 significantly promoted progression and metastasis of hepatocellular carcinoma. We performed RNA-seq on si-ZFPL1 xenograft tissue and identified CLDN3 as potential target gene for ZFPL1. Further experiments confirmed interaction between ZFPL1 and WNT signaling pathway markers. Conclusively, these studies indicated the effect and mechanism of ZFPL1 on promoting progression and metastasis of hepatocellular carcinoma and might gap the bridge between zinc-finger like proteins and hepatocellular carcinoma.
Project description:Resistance formation is one of the major hurdles in cancer therapy. Metronomic anti-angiogenic treatment of xenografted prostate cancer tumors in SCID mice with cyclophosphamide (CPA) results in the appearance of resistant tumors. To investigate the complex molecular changes occurring during resistance formation, we performed a comprehensive gene expression analysis of the resistant tumors in vivo. We observed a multitude of differentially expressed genes, e.g., PASD1, ANXA3, NTS or PLAT, when comparing resistant to in vivo passaged tumor samples. Furthermore, tumor cells from in vivo and in vitro conditions showed a significant difference in target gene expression. We assigned the differentially expressed genes to functional pathways like axon guidance, steroid biosynthesis and complement and coagulation cascades. Most of the genes were involved in anti-coagulation, indicating its possible importance. Upregulation of anti-coagulatory ANXA3 and PLAT and downregulation of PLAT inhibitor SERPINA were validated by qPCR. In contrast, coagulation factor F3 was upregulated, accompanied by the expression of an altered gene product. These findings give insights into the resistance mechanisms of metronomical CPA treatment suggesting an important role of anti-coagulation in resistance formation. 4 cell lines * 2 treatments * 4 replicates = 32 arrays. One sample (C3-T) was identified as an outlier and was omitted from further analysis; it is not included here.
Project description:Fibrolamellar hepatocellular carcinoma (FLC) is a rare type of primary liver cancer that often arises in children, adolescents and young adults. At the pathological level, FLC display pure morphology or can present with mixed morphology involving a conventional HCC component. Owing to the rarity of the disease, its genetic landscape is fully unknown. Pure FLC showed less chromosomic aberrations than mixed FLC and hepatocellular carcinoma arising in non-cirrhotic liverᄉ. Nevertheless; they displayed more gains in 16q23 and more LOH in 21q22. We also analyzed the mutational landscape of 8 FLC by whole-exome sequencing and showed mutations in the coagulation pathway.
Project description:Expression of miR-4730 in hepatocellular carcinoma suppresses tumor progression, and might be a prognostic marker or a therapeutic target of miRNA-based therapies.
Project description:Frontotemporal dementia (FTD) is an incurable group of early-onset dementias that can be caused by deposition of hyperphosphorylated tau in patient brains. However, the mechanisms leading to neurodegeneration remain largely unknown. Here, we combined single-cell analyses of FTD patient brains with a stem cell culture and transplantation model of FTD. We identified disease phenotypes in FTD neurons carrying the MAPT-N279K mutation, which were related to oxidative stress, oxidative phosphorylation and neuroinflammation with an upregulation of the inflammation-associated protein osteopontin (OPN). Human FTD neurons survived less and elicited an increased microglial response after transplantation into the mouse forebrain, that we further characterized by single nucleus RNA-sequencing of microdissected grafts. Notably, downregulation of OPN in engrafted FTD neurons resulted in improved engraftment and reduced microglial infiltration, indicating an immune-modulatory role of OPN in patient neurons, which may represent a potential therapeutic target in FTD.
Project description:Frontotemporal dementia (FTD) is an incurable group of early-onset dementias that can be caused by deposition of hyperphosphorylated tau in patient brains. However, the mechanisms leading to neurodegeneration remain largely unknown. Here, we combined single-cell analyses of FTD patient brains with a stem cell culture and transplantation model of FTD. We identified disease phenotypes in FTD neurons carrying the MAPT-N279K mutation, which were related to oxidative stress, oxidative phosphorylation and neuroinflammation with an upregulation of the inflammation-associated protein osteopontin (OPN). Human FTD neurons survived less and elicited an increased microglial response after transplantation into the mouse forebrain, that we further characterized by single nucleus RNA-sequencing of microdissected grafts. Notably, downregulation of OPN in engrafted FTD neurons resulted in improved engraftment and reduced microglial infiltration, indicating an immune-modulatory role of OPN in patient neurons, which may represent a potential therapeutic target in FTD.