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1.
Cancer Sci ; 108(5): 897-909, 2017 May.
Article in English | MEDLINE | ID: mdl-28208216

ABSTRACT

Recent studies have demonstrated that mesenchymal stem cells (MSC) exhibit a tropism to tumors and form the tumor stroma. In addition, we found that MSC can secrete different types of factors. However, the involvement of MSC-derived factors in human tongue squamous cell carcinoma (TSCC) growth has not been clearly addressed. The CCN family includes multifunctional signaling molecules that affect the initiation and development events of various tumors. In our study, we report that CCN2/connective tissue growth factor (CTGF) was the most highly induced among the CCN family members in MSC that were co-cultured with TSCC cells. To evaluate the relationship between CCN2 and TSCC growth, we downregulated MSC-derived CCN2 expression with shRNA targeting CCN2 and found that MSC-secreted CCN2 promotes TSCC cell proliferation, migration and invasion. We also confirmed that MSC-derived CCN2 partially accelerated tumor growth in vitro. Taken together, these results suggest that MSC-derived CCN2 contributes to the promotion of proliferation, migration and invasion of TSCC cells and may be a possible therapy target in the future.


Subject(s)
Carcinoma, Squamous Cell/genetics , Cell Movement/genetics , Cell Proliferation/genetics , Connective Tissue Growth Factor/genetics , Mesenchymal Stem Cells/metabolism , Neoplasm Invasiveness/genetics , Tongue Neoplasms/genetics , Carcinoma, Squamous Cell/pathology , Cell Line, Tumor , Down-Regulation/genetics , Gene Expression Regulation, Neoplastic/genetics , Humans , Neoplasm Invasiveness/pathology , Tongue Neoplasms/pathology
2.
Article in Chinese | WPRIM (Western Pacific) | ID: wpr-823337

ABSTRACT

Objective@#To understand the pathogenesis of bisphosphonate-related osteonecrosis of the jaws (BRONJ) and to investigate its differential diagnosis, clinical manifestations, treatment and prevention.@*Methods@#By analyzing the clinical data of 4 patients with BRONJ in the retrospective study with reviewing related literatures in the world to make a summary of it@*Results@#Cases of 4 patients mainly presented recurring pain, discharging of pus and disposure and necrosis of the bone. 3 patients received surgical and antibiotics treatments, one of them had local infection which was under control by oral antibiotic. The other 2 patients had no infection and recurrence.@*Conclusion@#BRONJ is caused by jaw necrosis due to bisphosphonate inhibition of osteoclast function. For the reason that none of the treatments is unified and satisfied, we should focus on the risk factors in prevention. Appropriate surgery treatment could be well controlled the process of the BRONJ which should be popularization in our study.

3.
Biochem Biophys Res Commun ; 478(2): 845-51, 2016 09 16.
Article in English | MEDLINE | ID: mdl-27507215

ABSTRACT

Platelet-derived growth factor D (PDGF-D) signaling plays significant roles during the development and progression of human malignancies via interacting with the receptor of PDGF-D (PDGFR). Meanwhile, the majority of human tumor metastasis is closely associated with epithelial-mesenchymal transition (EMT). However, the underlying mechanism between PDGF-D/PDGFR signaling and EMT which involved in tumor metastasis remain dismal. This study aimed to investigate the role of PDGF-D signaling during EMT process of tongue squamous cell carcinoma (TSCC). In our study, the expression of PDGF-D and PDGFR were examined in primary TSCC samples and the expression of PDGF-D was also determined in TSCC cell lines. In addition, the correlation between PDGF-D expression and TSCC aggressive histopathological features was analyzed. Our results implied that upregulation of PDGFRß in UM1 cells induced with exogenous PDGF-D can remarkably promote tumor cells invasiveness; conversely, when using small interfering RNA (siRNA), the invasiveness can be severely prohibited. Furthermore, PDGF-D downstream signal molecules p38, AKT, ERK and EMT biomarkers (E-cadherin, N-cadherin, Vimentin and snail) were measured using Western blot. Our results showed that PDGF-D can induce p38, AKT and ERK phosphorylation; downregulate epithelial markers and upregulate mesenchymal markers. On the contrary, PDGFRß siRNA significantly prohibited p38, AKT and ERK phosphorylation; inhibited EMT process. Function analysis revealed that PDGFRß siRNA obviously interfered with UM1 cell migration and invasion, according to transwell and wound healing assay. In conclusion, this study suggested that EMT process can be triggered by the PDGF-D/PDGFRß axis in TSCC, and then involved in the tumor cell invasion via activation of p38/AKT/ERK/EMT pathway.


Subject(s)
Carcinoma, Squamous Cell/genetics , Epithelial-Mesenchymal Transition/genetics , Gene Expression Regulation, Neoplastic , Proto-Oncogene Proteins c-akt/genetics , Tongue Neoplasms/genetics , p38 Mitogen-Activated Protein Kinases/genetics , Antigens, CD/genetics , Antigens, CD/metabolism , Cadherins/genetics , Cadherins/metabolism , Carcinoma, Squamous Cell/metabolism , Carcinoma, Squamous Cell/pathology , Cell Line, Tumor , Cell Movement , Disease Progression , Humans , Lymphokines/antagonists & inhibitors , Lymphokines/genetics , Lymphokines/metabolism , Mitogen-Activated Protein Kinase 3/genetics , Mitogen-Activated Protein Kinase 3/metabolism , Neoplasm Invasiveness , Phosphorylation , Platelet-Derived Growth Factor/antagonists & inhibitors , Platelet-Derived Growth Factor/genetics , Platelet-Derived Growth Factor/metabolism , Proto-Oncogene Proteins c-akt/metabolism , RNA, Small Interfering/genetics , RNA, Small Interfering/metabolism , Receptor, Platelet-Derived Growth Factor beta/antagonists & inhibitors , Receptor, Platelet-Derived Growth Factor beta/genetics , Receptor, Platelet-Derived Growth Factor beta/metabolism , Signal Transduction , Snail Family Transcription Factors/genetics , Snail Family Transcription Factors/metabolism , Tongue Neoplasms/metabolism , Tongue Neoplasms/pathology , Vimentin/genetics , Vimentin/metabolism , p38 Mitogen-Activated Protein Kinases/metabolism
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