Exosomes derived from pancreatic cancer cells induce activation and profibrogenic activities in pancreatic stellate cells

Masamune, Atsushi; Yoshida, Naoki; Hamada, Shin; Takikawa, Tetsuya; Nabeshima, Tatsuhide; Shimosegawa, Tooru

doi:10.1016/j.bbrc.2017.10.141

Cited by 86 publications

(68 citation statements)

References 40 publications

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“…In addition, the correlation between miR‐1246 and the target gene CCNG2 still needs further study. Although the direct regulating relationship has been confirmed in oral, breast, pancreatic, and colorectal cancers we still need to clarify in LSCC.…”

Section: Discussionmentioning

confidence: 99%

Lack of miR‐1246 in small extracellular vesicle blunts tumorigenesis of laryngeal carcinoma cells by regulating Cyclin G2

et al. 2020

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Small extracellular vesicle (sEV) has precise impacts on tumor microenvironment and play vital functions in intercellular interaction. However, the functional role of sEV miRNA on laryngeal squamous cell carcinoma (LSCC) is largely unresolved. Here, the expression of miR‐1246 in LSCC tissues and plasma sEV was examined. The internalization ability of sEV was determined by uptake assay. Then, the source and purity of sEV were checked through RNase and/or pharmacological inhibitors application. The invasion, migration, proliferation, and cell cycle assays were used to determine the altered abilities of miR‐1246 in sEV in LSCC. Finally, target gene of miR‐1246, Cyclin G2 (CCNG2), was stained immunohistochemically. In addition, the relationship between CCNG2 and clinicopathological features of patients was analyzed. We found that miR‐1246 was higher in LSCC tissues and plasma sEV. MiR‐1246 was enriched in sEV rather than soluble form. SEV could be internalized into adjacent cells. Lack of miR‐1246 in sEV abrogated the tumorigenesis of LSCC. Furthermore, CCNG2 knockdown arrested the cell cycle and correlated to clinicopathological features and prognosis of LSCC patients. Taken together, we found that the function of sEV miR‐1246 by regulating CCNG2 is responsible for LSCC advancement with emphasis on the main source of miR‐1246 mainly root in sEV rather than in soluble form.

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Section: Discussionmentioning

confidence: 99%

Lack of miR‐1246 in small extracellular vesicle blunts tumorigenesis of laryngeal carcinoma cells by regulating Cyclin G2

et al. 2020

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“…Some miRNAs expressions are beneficial to PSCs activation. Masamune et al found that pancreatic cancer cell-derived exosomes could increase the activity of PSCs and also induce their fibrosis-related gene expression by miR-1246 and miR-1290 [53]. Connective tissue growth factor (CCN2) and miR-21 are components of PSCs-derived exosomes which are significantly up-regulated in activated PSCs.…”

Section: Non-coding Rnasmentioning

confidence: 99%

Molecular Mechanism of Pancreatic Stellate Cells Activation in Chronic Pancreatitis and Pancreatic Cancer

Jin¹,

Hong²,

Guo³

et al. 2020

J. Cancer

103

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Activated pancreatic stellate cells (PSCs) are the main effector cells in the process of fibrosis, a major pathological feature in pancreatic diseases that including chronic pancreatitis and pancreatic cancer. During tumorigenesis, quiescent PSCs change into an active myofibroblast-like phenotype which could create a favorable tumor microenvironment and facilitate cancer progression by increasing proliferation, invasiveness and inducing treatment resistance of pancreatic cancer cells. Many cellular signals are revealed contributing to the activation of PSCs, such as transforming growth factor-β, platelet derived growth factor, mitogen-activated protein kinase (MAPK), Smads, nuclear factor-κB (NF-κB) pathways and so on. Therefore, investigating the role of these factors and signaling pathways in PSCs activation will promote the development of PSCs-specific therapeutic strategies that may provide novel options for pancreatic cancer therapy. In this review, we systematically summarize the current knowledge about PSCs activation-associated stimulating factors and signaling pathways and hope to provide new strategies for the treatment of pancreatic diseases.

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“…Premetastatic niche stroma and tumor stroma are characterized mostly by changes toward fibrosis (Masamune et al, 2018). A specific contribution of CD44 remains to be explored.…”

Section: Cic Cd44 and Texmentioning

confidence: 99%

CD44/CD44v6 a Reliable Companion in Cancer-Initiating Cell Maintenance and Tumor Progression

Wang

Zhao

Hackert

et al. 2018

Front. Cell Dev. Biol.

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Metastasis is the leading cause of cancer death, tumor progression proceeding through emigration from the primary tumor, gaining access to the circulation, leaving the circulation, settling in distant organs and growing in the foreign environment. The capacity of a tumor to metastasize relies on a small subpopulation of cells in the primary tumor, so called cancer-initiating cells (CIC). CIC are characterized by sets of markers, mostly membrane anchored adhesion molecules, CD44v6 being the most frequently recovered marker. Knockdown and knockout models accompanied by loss of tumor progression despite unaltered primary tumor growth unraveled that these markers are indispensable for CIC. The unexpected contribution of marker molecules to CIC-related activities prompted research on underlying molecular mechanisms. This review outlines the contribution of CD44, particularly CD44v6 to CIC activities. A first focus is given to the impact of CD44/CD44v6 to inherent CIC features, including the crosstalk with the niche, apoptosis-resistance, and epithelial mesenchymal transition. Following the steps of the metastatic cascade, we report on supporting activities of CD44/CD44v6 in migration and invasion. These CD44/CD44v6 activities rely on the association with membrane-integrated and cytosolic signaling molecules and proteases and transcriptional regulation. They are not restricted to, but most pronounced in CIC and are tightly regulated by feedback loops. Finally, we discuss on the engagement of CD44/CD44v6 in exosome biogenesis, loading and delivery. exosomes being the main acteurs in the long-distance crosstalk of CIC with the host. In brief, by supporting the communication with the niche and promoting apoptosis resistance CD44/CD44v6 plays an important role in CIC maintenance. The multifaceted interplay between CD44/CD44v6, signal transducing molecules and proteases facilitates the metastasizing tumor cell journey through the body. By its engagement in exosome biogenesis CD44/CD44v6 contributes to disseminated tumor cell settlement and growth in distant organs. Thus, CD44/CD44v6 likely is the most central CIC biomarker.

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Exosomes derived from pancreatic cancer cells induce activation and profibrogenic activities in pancreatic stellate cells

Cited by 86 publications

References 40 publications

Lack of miR‐1246 in small extracellular vesicle blunts tumorigenesis of laryngeal carcinoma cells by regulating Cyclin G2

Lack of miR‐1246 in small extracellular vesicle blunts tumorigenesis of laryngeal carcinoma cells by regulating Cyclin G2

Molecular Mechanism of Pancreatic Stellate Cells Activation in Chronic Pancreatitis and Pancreatic Cancer

CD44/CD44v6 a Reliable Companion in Cancer-Initiating Cell Maintenance and Tumor Progression

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