Single-cell transcriptomic analysis of ascites cells from Dusp4 knockout and wild-type mouse models of ovarian cancer metastasis
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE341506 | GEO | 2026/09/01
REPOSITORIES: GEO
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Project description:Ascites is an abnormal fluid that accumulates in the peritoneal cavity of more than 90% of patients with metastatic ovarian cancer. Despite its common occurance, little is known about its effects on detached and metastasizing ovarian cancer cells, which frequently metastasize to the peritoneum. This experiment aims to identify any transcriptional changes that occur in ovarian cancer cell lines as a result of exposure to ovarian cancer ascites
2026-01-22 | GSE281415 | GEO
Project description:Ascites is an abnormal fluid that accumulates in the peritoneal cavity of more than 90% of patients with metastatic ovarian cancer. Despite its common occurance, little is known about its effects on detached and metastasizing ovarian cancer cells, which frequently metastasize to the peritoneum. This experiment aims to identify any transcriptional changes that occur in ovarian cancer cell lines as a result of exposure to ovarian cancer ascites and whether the fibrate drug, bezafibrate had any reversing effect on the ascites-mediated changes
2026-01-22 | GSE281433 | GEO
Project description:Ovarian cancer is characterized by transcoelomic metastasis into the peritoneal cavity. The peritoneal malignant ascites is enriched with ovarian cancer cells and a small amount of tumor-associated immune cells which create a unique microenvironment actively contributing to progression of the disease. However, it is remain unclear how cancer cells communicate to its local environment under the influence of chemotherapy. To address this issue, we performed LC-MS/MS analyses of ovarian cancer ascites from the same patients before and after chemotherapy. We found that neoadjuvant chemotherapy causes a significant changes in the composition of ascites, and these changes are similar in samples obtained from all patients (n=10). Functional annotation of upregulated proteins with the use of KEGG and GO databases revealed that malignant ascites after chemotherapy were enriched with the cluster of spliceosomal proteins. These splicing factors were linked to induction of epithelial-to-mesenchymal transition leading to a more aggressive phenotype of cancer cells.
2024-05-29 | PXD019327 | Pride
Project description:Background: More than 90% of advanced ovarian cancer patients develop malignant ascites, which describes a buildup of fluid in the peritoneal cavity caused by increased vascular permeability and obstructed lymphatic drainage. Malignant ascites contains spheroidal three-dimensional tumor cell clusters which can contain stromal cells, cancer-associated fibroblasts, and blood cells. These ascites-derived spheroids facilitate peritoneal metastasis and treatment resistance; however, little is known about the phenotypic and proteomic changes caused by the ascites environment on these spheroids. Furthermore, the suitability of standard cell culture medium for ex vivo treatment response testing in personalized medicine approaches remains unknown. (2) Methods: Using mass spectrometry, we compared the proteome profiles of cell-free ascites to serum from ovarian cancer patients, followed by the proteome profiles of immortalized cancer cells cultured in malignant ascites versus standard cell culture medium as monolayers and spheroids. The effects of this fluid on the phenotype, molecular composition, and ex vivo chemotherapy responses of cancer cells were also measured. (3) Results: The proteome analysis of cell-free ascites identified increased abundances of extracellular, secreted, and membrane proteins compared to serum. Ascites promoted cell viability and spheroid formation of immortalized ovarian cancer cell lines when compared to cell culture medium. Despite altered baseline viability, growth of spheroids in ascites versus cell culture medium did not hinder chemotherapy response assessments, which could simplify future personalized medicine approaches. The observed phenotypic changes of cells grown in ascites could not be recapitulated by the addition of chemokines or periostin to cell culture medium alone, indicating that additional factors are necessary to induce the native phenotype. However, elevated levels of transglutaminase 2 (TGM2)—an ECM modulatory protein that enabled treatment resistance and disease spread— was identified in SKOV-3 2D and 3D cultures grown in ascites, indicating a direct role of ascites in the regulation of protein expression in cancer cells.
2026-09-02 | PXD074417 | Pride
Project description:Ovarian cancer is characterized by transcoelomic metastasis into the peritoneal cavity. The peritoneal malignant ascites is enriched with ovarian cancer cells and a small amount of tumor-associated immune cells which create a unique microenvironment actively contributing to progression of the disease. However, it remains unclear how cancer cells communicate to its local environment under the influence of chemotherapy. To address this issue, we performed LC-MS/MS analyses of several primary cultures of ovarian cancer cells from chemonaive malignant ascites incubated for 3 days with autologous pre- or post-chemotherapy ascitic fluids. Enrichment analysis identified prominent upregulation of proteins associated with pathways of DNA repair and cell cycle regulation in tumor cells incubated with ascitic fluids after chemotherapy. Consistently with these data, ascites after therapy increased the resistance of ovarian cancer cells to cisplatin. These findings demonstrate that under stress condition cancer cells can secrete signaling molecules into the extracellular space and contribute to the emergence of tumor chemoresistance during short time period.
2024-05-29 | PXD045647 | Pride
Project description:Ovarian cancer is one of the leading causes of death in females in the world. High-grade serous ovarian carcinoma (HGSOC) is the most common histological subtype, and the platinum-resistance is a clinical challenge. HGSOC frequently spreads to the peritoneal cavity and causes carcinomatous peritonitis. Extracellular vesicles (EVs) are lipid-bilayer nanoparticles containing various bioactive molecules. Thus, EVs mediate cell-to-cell communication and contribute to cancer progression. Moreover, EVs stably exist in the body fluid, including serum and ascites. This study investigated the ascites EV miRNA profiles of platinum-resistant and platinum-sensitive HGSOC.
2025-09-03 | GSE273636 | GEO
Project description:Ovarian cancer often progresses by disseminating to the peritoneal cavity, but how the tumor cells evade host immunity during this process is poorly understood. Programmed cell death 1 ligand 1 (PD-L1) is known to suppress immune system and to be an unfavorable prognostic factor in ovarian cancer. The purpose of this study was to elucidate the function of PD-L1 in peritoneal dissemination. Positive cytology in ascites was a significant poor prognostic factor in ovarian cancer. Microarray profiles of cytology-positive cases showed significant correlations with Gene Ontology terms related to immune system process. Microarray and immunohistochemistry in human ovarian cancer revealed significant correlation between PD-L1 expression and positive cytology. PD-L1 expression on mouse ovarian cancer cells was induced upon encountering lymphocytes in the course of peritoneal spread in vivo and upon co-culturing with lymphocytes in vitro. Tumor cell lysis by CTLs was attenuated when PD-L1 was overexpressed and promoted when it was silenced. PD-L1 overexpression also inhibited gathering and degranulation of CTLs. In mouse ovarian cancer dissemination models, depleting PD-L1 expression on tumor cells resulted in inhibited tumor growth in the peritoneal cavity and prolonged survival. Restoring immune function by inhibiting immune-suppressive factors such as PD-L1 may be a promising therapeutic strategy for peritoneal dissemination. Genome-wide transcriptional changes in human ovarian cancer tissue from ascites-cytology-positive or -negative patients.
2012-07-09 | E-GEOD-39204 | biostudies-arrayexpress
Project description:Characterizations of ascites proteome from ovarian PC and gastric PC have demonstrated that ascites contains elevated pro-tumorigenic factors. Reasoning that the composition of ascitic fluid might offer insight into the memory of key biological events occurring intra-abdominally, we hypothesized that paracrine factors essential for survival and growth of peritoneal deposits are secreted into and circulate within ascitic fluid. Our data suggest that ascites contains biologically active ligands capable of supporting cellular functions of cancer cells.
2022-02-22 | GSE189168 | GEO
Project description:Characterizations of ascites proteome from ovarian PC and gastric PC have demonstrated that ascites contains elevated pro-tumorigenic factors. Reasoning that the composition of ascitic fluid might offer insight into the memory of key biological events occurring intra-abdominally, we hypothesized that paracrine factors essential for survival and growth of peritoneal deposits are secreted into and circulate within ascitic fluid. Our data from cytokine array profile suggest that ascites contains biologically active ligands capable of supporting cellular functions of cancer cells. To decipher downstream signalling pathways activated in cancer cells when exposed to ascites, we performed gene expression analysis of Colo-205 and SNU-C1 cells upon exposure to PC ascites.
2022-02-22 | GSE189004 | GEO
Project description:Characterizations of ascites proteome from ovarian peritoneal carcinomatosis (PC) and gastric PC have demonstrated that ascites contains elevated pro-tumorigenic factors. Reasoning that the composition of ascitic fluid might offer insight into the memory of key biological events occurring intra-abdominally, we hypothesized that paracrine factors essential for survival and growth of peritoneal deposits are secreted into and circulate within ascitic fluid. Our data from cytokine array profile suggest that ascites contains biologically active ligands capable of supporting cellular functions of cancer cells. To decipher downstream signalling pathways activated in cancer cells when exposed to ascites, we performed gene expression analysis of Colo-205 cells upon exposure to PC ascites and ligand inhibitor.
2022-02-22 | GSE189137 | GEO