Dear Editor,Ferroptosis,an iron-dependent form of cell death driven by overwhelming lipid peroxidation,represents a vulnerability in cancers,and therapeutic strategies to further potentiate ferroptosis hold great pote...Dear Editor,Ferroptosis,an iron-dependent form of cell death driven by overwhelming lipid peroxidation,represents a vulnerability in cancers,and therapeutic strategies to further potentiate ferroptosis hold great potential for melanoma treatment.展开更多
Finding biomarkers for immunotherapy is an urgent issue in cancer treatment.Cellular retinoic acid-binding protein 2(CRABP2)is a controversial factor in the occurrence and development of human tumors.However,there is ...Finding biomarkers for immunotherapy is an urgent issue in cancer treatment.Cellular retinoic acid-binding protein 2(CRABP2)is a controversial factor in the occurrence and development of human tumors.However,there is limited research on the relationship between CRABP2 and immunotherapy response.This study found that negative correlations of CRABP2 and immune checkpoint markers(PD-1,PD-L1,and CTLA-4)were observed in breast invasive carcinoma(BRCA),skin cutaneous melanoma(SKCM),stomach adenocarcinoma(STAD)and testicular germ cell tumors(TGCT).In particular,in SKCM patients who were treated with PD-1 inhibitors,high levels of CRABP2 predicted poor prognosis.Additionally,CRABP2 expression was elevated in cancer-associated fibroblasts(CAFs)at the single-cell level.The expression of CRABP2 was positively correlated with markers of CAFs,such as MFAP5,PDPN,ITGA11,PDGFRα/βand THY1 in SKCM.To validate the tumor-promoting effect of CRABP2 in vivo,SKCM xenograft mice models with CRABP2 overexpression have been constructed.These models showed an increase in tumor weight and volume.Enrichment analysis indicated that CRABP2 may be involved in immunerelated pathways of SKCM,such as extracellular matrix(ECM)receptor interaction and epithelial-mesenchymal transition(EMT).The study suggests that CRABP2 may regulate immunotherapy in SKCM patients by influencing infiltration of CAFs.In conclusion,this study provides new insights into the role of CRABP2 in immunotherapy response.The findings suggest that CRABP2 may be a promising biomarker for PD-1 inhibitors in SKCM patients.Further research is needed to confirm these findings and to explore the clinical implications of CRABP2 in immunotherapy.展开更多
Background: Uveal melanoma (UVM) is the most common primary intraocular tumor in adults. However, identification of the effective biomarker for the diagnosis and treatment of UVM remains to be explored. Calcium and in...Background: Uveal melanoma (UVM) is the most common primary intraocular tumor in adults. However, identification of the effective biomarker for the diagnosis and treatment of UVM remains to be explored. Calcium and integrin-binding protein 1 (CIB1) is emerging as an important factor in tumor progression. Purpose: To determine the contribution of CIB1 in the diagnosis of UVM. Method: Immunohistochemical staining is used to detect the CIB1 expression level, while Gene Expression Profiling Interactive Analysis 2 (GEPIA2) and UALCAN online tools were used to analyze patient survival and CIB1 correlation genes in UVM. Integrative analysis using STRING and GeneMANIA predicted the correlated genes with CIB1 in UVM. Results: CIB1 expression level in UVM was significantly enhanced when compared with that in paracancerous tissues. A higher CIB1 expression level resulted in a significantly worse disease-free survival as well as overall survival. Moreover, the survival probability of patients was associated with body weight and gender of the patients with UVM. The correlated genes with CIB1 in UVM, and the similarity of the genes in UVM expression and survival heatmap were verified. Furthermore, Gene ontology enrichment analysis revealed that CIB1 and its correlated genes are significantly enriched in ITGA2B-ITGB3-CIB1 complex, regulation of intracellular protein transport and regulation of ion transport. Conclusions: Our novel findings suggested that CIB1 might be a potential diagnostic predictor for UVM, and might contribute to the potential strategy for UVM treatment by targeting CIB1.展开更多
目的:探讨程序性死亡配体1(PD-L1)单克隆抗体是否可以增强ALDH high CSC-DC疫苗致敏的B细胞靶向ALDH high肿瘤干细胞(CSCs)的体液免疫作用。方法:建立B16-F10黑色素瘤小鼠模型,各组小鼠分别接受PBS、ALDH high CSC-DC+IgG、ALDH high CS...目的:探讨程序性死亡配体1(PD-L1)单克隆抗体是否可以增强ALDH high CSC-DC疫苗致敏的B细胞靶向ALDH high肿瘤干细胞(CSCs)的体液免疫作用。方法:建立B16-F10黑色素瘤小鼠模型,各组小鼠分别接受PBS、ALDH high CSC-DC+IgG、ALDH high CSC-DC疫苗、PD-L1单克隆抗体、ALDH high CSC-DC联合PD-L1单克隆抗体的治疗,记录小鼠的生存时间及肿瘤的体积。实验结束时收集各组小鼠的肿瘤,单个肿瘤细胞悬液进行ALDEFLUOR染色检测CSCs的比例。流式细胞术检测各组小鼠脾脏B细胞上PD-1的表达量。同时进一步行抗体结合试验和补体依赖的细胞毒性作用(CDC)试验检测B细胞培养上清中的抗体结合和裂解CSCs的能力。结果:相较于单独治疗组,PD-L1单克隆抗体与ALDH high CSC-DC疫苗的联合治疗可以更加显著地抑制肿瘤生长,延长小鼠生存时间。联合治疗组小鼠活化的B淋巴细胞上PD-1的表达水平显著降低,仅为6.5%。抗体结合试验提示,与ALDH high CSC-DC疫苗单独治疗组11.3%的结合率相比,联合治疗组小鼠B细胞培养上清中的抗体可以特异地结合15.7%ALDH high CSCs。同时CDC试验结果显示,联合治疗组的B细胞培养上清特异性地裂解ALDH high CSCs。结论:PD-L1单克隆抗体可以显著增强ALDH high CSC-DC疫苗致敏的B细胞产生靶向ALDH high CSCs的体液免疫反应。展开更多
Gliomas and melanomas are associated with dismal prognosis because of their marked intrinsic resistance to proapoptotic stimuli,such as conventional chemotherapy and radiotherapy,as well as their ability to escape imm...Gliomas and melanomas are associated with dismal prognosis because of their marked intrinsic resistance to proapoptotic stimuli,such as conventional chemotherapy and radiotherapy,as well as their ability to escape immune cell attacks.In addition,gliomas and melanomas display pronounced neoangiogenesis.Galectin-1 is a hypoxia-sensitive protein,which is abundantly secreted by glioma and melanoma cells,which displays marked proangiogenic effects.It also provides immune tolerogenic environments to melanoma and glioma cells through the killing of activated T cells that attack these tumor cells.Galectin-1 protects glioma and melanoma cells against cytotoxic insults(including chemotherapy and radiotherapy) through a direct role in the unfolded protein response.Altogether,these facts clearly point to galectin-1 as an important target to be combated in gliomas and melanomas in order to:(1) weaken the defenses of these two types of cancers against radiotherapy,chemotherapy and immunotherapy/vaccine therapy;and(2) reinforce antiangiogenic therapies.In the present article,we review the biochemical and molecular biology-related pathways controlled by galectin-1,which are actually beneficial for melanoma and glioma cells,and therefore detrimental for melanoma and glioma patients.展开更多
AIM： To reveal the insight mechanism of liver metastasis in uveal melanoma, we investigated cell functions of microRNA-21 in three different uveal melanoma cell lines and analyze the relationship of target gene p53 a...AIM： To reveal the insight mechanism of liver metastasis in uveal melanoma, we investigated cell functions of microRNA-21 in three different uveal melanoma cell lines and analyze the relationship of target gene p53 and its downstream targets which been found significant expression in our previous study.METHODS： Quantitative real-time polymerase chain reaction （qRT-PCR） was used to detect microRNA-21 expression in normal uveal tissue and uveal melanoma cell lines. Lenti-virus expression system was used to construct OCM-1, MuM-2B and M619 cell line with stable overexpression and inhibition of microRNA-21. In vitro cell function tests such as cell proliferation, cell apoptosis, cell circle and abilities of migration and invasion were examined by MTT, BrdU assay, flow cytometry, transwell assay and Matrigel invasion assay respectively. The target gene was predicted by bioinformatics and confirmed by using a dual luciferase reporter assay. The expression of p53 and its suspected downstream targets LIM and SH3 protein 1 （LASP1） and Glutathione S Transferase pi （GST-Pi） were determined by qRT-PCR in mRNA level and western blotting analysis in protein level. Finally, the effect of microRNA-21 in a xenograft tumor model was assessed in four-week-old BALB/c nude mice. RESULTS： Compared to normal uveal melanoma, expressions of microRNA-21 were significantly higher in uveal melanoma cell lines. Overexpression of microRNA-21 promoted proliferation, migration, and invasion of OCM-1, M619 and MuM-2B cells, while inhibition of microRNA-21 reveal opposite effects. Wild type p53 was identified as a target gene of microRNA-21-3p, and proved by dual luciferase reporter assay. Up-regulated microRNA-21 inhibited the expression of wild type p53 gene, and the increased expression of LASP1 in mRNA level and protein level, while down-regulated microRNA-21 presented opposite way. However, GST-pi showed the potential pattern as expected, but relative mRNA level showed no statistically significant difference in OCM-1 cells. Furthermore, the mRNA expression of GST-pi was decreased in microRNA-21 overexpressing MuM-2B, and increased in M619 cells with inhibition of microRNA-21. In vivo, inhibition of microRNA-21 reduced tumor growth with statistically significant difference.CONCLUSION： These findings provide novel insight into molecular etiology of microRNA-21 in uveal melanoma cell lines, and suggest that microRNA-21 might be a potential candidate for the diagnosis and prognostic factor of human uveal melanoma in future.展开更多
AIM:To investigate the role of microRNA-145(miRNA-145)and microRNA-205(miRNA-205)in proliferation and invasion of uveal melanoma(UM)cells.METHODS:The expression level of miRNA-145 and miR NA-205 from samples of UM pat...AIM:To investigate the role of microRNA-145(miRNA-145)and microRNA-205(miRNA-205)in proliferation and invasion of uveal melanoma(UM)cells.METHODS:The expression level of miRNA-145 and miR NA-205 from samples of UM patients were determined by real-time polymerase chain reaction(RT-PCR).The growth and invasion inhibitory effects were observed by the transfection of UM cells with miRNA-145 and miRNA-205.Several epithelial-to-mesenchymal transition(EMT)-related proteins were screened by Western blotting.UM clinical samples from The Cancer Genome Atlas(TCGA)were applied to search for potential protein interaction.Pearson’s correlation analysis was applied to estimate co-expression between genes.Dual-luciferase reporter assay was used to verify the binding sites on target protein for miRNA-145 and miRNA-205.RESULTS:The expression levels of miRNA-145 and miRNA-205 in the samples from patients with UM were significantly lower than those in the normal tissue samples.Significant growth and invasion inhibitory effects were observed in human UM cells with miRNA-145 and miR NA-205 overexpression.The miRNA-145 and miRNA-205 could decrease the expression level of cell division control protein 42(CDC42).After database searching and sequence alignment,we identified that Neuropilin 1(NRP1)had binding sites for both miRNA-145 and miRNA-205.CONCLUSION:The miRNA-145 and miRNA-205 can reduce the proliferation,migration and invasion of UM cells by targeting the mRNA of its upstream protein NRP1 to down-regulate the expression level of CDC42.展开更多
In order to investigate the expression of endothelin receptor B （ETR-B） in human malignant melanoma （MM） cells A375 and SK-mel-1 and the proliferative effects of endothelin 3 （ET3） on A375 cells, RT-PCR was appl...In order to investigate the expression of endothelin receptor B （ETR-B） in human malignant melanoma （MM） cells A375 and SK-mel-1 and the proliferative effects of endothelin 3 （ET3） on A375 cells, RT-PCR was applied to detect the expression of ETR-B gene in human MM cells A375 and SK-mel-1. MTT method was used to evaluate the growth enhancing effects of ET3 on A375 cell line in vitro. The results showed that ETR-B gene was expressed in both MM A375 and SK-mel-1 cells. ET3 had stronger ability to enhance the proliferation of A375 cells in vitro in a concentration-dependent manner. It was suggested that ET3/ETR-B might play an important proliferative role in MM.展开更多
BACKGROUND The ABCD stratification[combination of serum pepsinogen(PG)levels and titers of antibody(immunoglobulin G,IgG)against Helicobacter pylori(H.pylori)]is effective for the classification of individuals at risk...BACKGROUND The ABCD stratification[combination of serum pepsinogen(PG)levels and titers of antibody(immunoglobulin G,IgG)against Helicobacter pylori(H.pylori)]is effective for the classification of individuals at risk of developing gastric cancer(GC).The Kita–Kyushu lung cancer antigen-1(KK-LC-1)is a Cancer/Testis antigen frequently expressed in GC.AIM To evaluate the effectiveness of KK-LC-1 and ABCD stratification in the diagnosis of GC.METHODS We analyzed the gene expression of KK-LC-1 in surgical specimens obtained from GC tumors.The levels of serum PG I/PG II and IgG against H.pylori were measured.According to their serological status,the patients were classified into the four groups of the ABCD stratification.RESULTS Of the 77 examined patients,63(81.8%)expressed KK-LC-1.The IgG titers of H.pylori and PG II were significantly higher in patients expressing KK-LC-1 than those measured in patients not expressing KK-LC-1(P=0.0289 and P=0.0041,respectively).The expression of KK-LC-1 in group C[PG method(+)/H.pylori infection(+)]was as high as 93.9%high.KK-LC-1 was also detected in group A[-/-].CONCLUSION The KK-LC-1 expression in GC was associated with H.pylori infection and atrophic status,so that,KK-LC-1 may be a useful marker for the diagnosis of GC.展开更多
The mortality of cancer patients has considerably improved due to progress in surgery, chemotherapy and radiotherapy. However, some types of cancers, such as melanoma, remain refractory to conventional strategies. Alt...The mortality of cancer patients has considerably improved due to progress in surgery, chemotherapy and radiotherapy. However, some types of cancers, such as melanoma, remain refractory to conventional strategies. Although melanoma accounts for only 4% of all dermatological malignancies, it is responsible for 80% of mortalities from skin tumors[11. The reported survival rate of melanoma over 5 years is not yet encouraging due to its chemo-resistance and rapid metastasis. Therefore, it is necessary to develop new drugs with potent activity and weak side-effect against melanoma.展开更多
Programmed cell death protein 1(PD-1)/programmed cell death ligand 1(PD-L1)blockade is an important therapeutic strategy for melanoma,despite its low clinical response.It is important to identify genes and pathways th...Programmed cell death protein 1(PD-1)/programmed cell death ligand 1(PD-L1)blockade is an important therapeutic strategy for melanoma,despite its low clinical response.It is important to identify genes and pathways that may reflect the clinical outcomes of this therapy in patients.We analyzed clinical dataset GSE96619,which contains clinical information from five melanoma patients before and after anti-PD-1 therapy(five pairs of data).We identified 704 DEGs using these five pairs of data,and then the number of DEGs was narrowed down to 286 in patients who responded to treatment.Next,we performed KEGG pathway enrichment and constructed a DEG-associated protein-protein interaction network.Smooth muscle actin 2(ACTA2)and tyrosine kinase growth factor receptor(KDR)were identified as the hub genes,which were significantly downregulated in the tumor tissue of the two patients who re-sponded to treatment.To confirm our analysis,we demonstrated similar expression tendency to the clinical data for the two hub genes in a B16F10 subcutaneous xeno-graft model.This study demonstrates that ACTA2 and KDR are valuable responsive markers for PD-1/PD-L1 blockade therapy.展开更多
Abnormal regulation of apoptosis is an important aspect of tumour development. Capsaicin, an extract of red chilli peppers, has been shown to inhibit growth of melanoma and other malignant cell lines and HA14-1 is an ...Abnormal regulation of apoptosis is an important aspect of tumour development. Capsaicin, an extract of red chilli peppers, has been shown to inhibit growth of melanoma and other malignant cell lines and HA14-1 is an organic compound that directly induces apoptosis by binding to Bcl-2 protein. The aim of this work was to investigate whether combination therapy with capsaicin and HA14-1 might hold any promise for the treatment of melanoma. Three melanoma cell lines of a range of aggressive potential, melanocytes and fibroblasts were examined, looking at the effects of both drugs singly and in combination on cell viability and induction of apoptosis. This comparative study showed that melanoma cells and melanocytes have a similar sensitivity to capsaicin while fibroblasts are more resistant to it. HA14-1, as expected, induced apoptosis in all cells at relatively low concentrations. A combination of the two agents produced the expected results of an additive effect for 2 (HBL and A375SM) out of 3 melanoma cell lines in inducing apoptosis, but encouragingly for the most metastatically aggressive cancer cell line (C8161), a combination of the two showed a synergistic induction of apoptosis.展开更多
基金This work was supported by grants from the National Natural Science Foundation of China(82103183,82102803,82272849)the Natural Science Foundation of Hunan Province(2022JJ40767,2021JJ40976)+1 种基金the Natural Science Fund for Outstanding Youths in Hunan Province(2023JJ20093)the National Key Research and Development Program(2022YFC2504700).
文摘Dear Editor,Ferroptosis,an iron-dependent form of cell death driven by overwhelming lipid peroxidation,represents a vulnerability in cancers,and therapeutic strategies to further potentiate ferroptosis hold great potential for melanoma treatment.
基金supported by grants from the Natural Science Foundation of Hunan Province(2022JJ80044)the Youth Science Foundation of Xiangya Hospital(2019Q13).
文摘Finding biomarkers for immunotherapy is an urgent issue in cancer treatment.Cellular retinoic acid-binding protein 2(CRABP2)is a controversial factor in the occurrence and development of human tumors.However,there is limited research on the relationship between CRABP2 and immunotherapy response.This study found that negative correlations of CRABP2 and immune checkpoint markers(PD-1,PD-L1,and CTLA-4)were observed in breast invasive carcinoma(BRCA),skin cutaneous melanoma(SKCM),stomach adenocarcinoma(STAD)and testicular germ cell tumors(TGCT).In particular,in SKCM patients who were treated with PD-1 inhibitors,high levels of CRABP2 predicted poor prognosis.Additionally,CRABP2 expression was elevated in cancer-associated fibroblasts(CAFs)at the single-cell level.The expression of CRABP2 was positively correlated with markers of CAFs,such as MFAP5,PDPN,ITGA11,PDGFRα/βand THY1 in SKCM.To validate the tumor-promoting effect of CRABP2 in vivo,SKCM xenograft mice models with CRABP2 overexpression have been constructed.These models showed an increase in tumor weight and volume.Enrichment analysis indicated that CRABP2 may be involved in immunerelated pathways of SKCM,such as extracellular matrix(ECM)receptor interaction and epithelial-mesenchymal transition(EMT).The study suggests that CRABP2 may regulate immunotherapy in SKCM patients by influencing infiltration of CAFs.In conclusion,this study provides new insights into the role of CRABP2 in immunotherapy response.The findings suggest that CRABP2 may be a promising biomarker for PD-1 inhibitors in SKCM patients.Further research is needed to confirm these findings and to explore the clinical implications of CRABP2 in immunotherapy.
文摘Background: Uveal melanoma (UVM) is the most common primary intraocular tumor in adults. However, identification of the effective biomarker for the diagnosis and treatment of UVM remains to be explored. Calcium and integrin-binding protein 1 (CIB1) is emerging as an important factor in tumor progression. Purpose: To determine the contribution of CIB1 in the diagnosis of UVM. Method: Immunohistochemical staining is used to detect the CIB1 expression level, while Gene Expression Profiling Interactive Analysis 2 (GEPIA2) and UALCAN online tools were used to analyze patient survival and CIB1 correlation genes in UVM. Integrative analysis using STRING and GeneMANIA predicted the correlated genes with CIB1 in UVM. Results: CIB1 expression level in UVM was significantly enhanced when compared with that in paracancerous tissues. A higher CIB1 expression level resulted in a significantly worse disease-free survival as well as overall survival. Moreover, the survival probability of patients was associated with body weight and gender of the patients with UVM. The correlated genes with CIB1 in UVM, and the similarity of the genes in UVM expression and survival heatmap were verified. Furthermore, Gene ontology enrichment analysis revealed that CIB1 and its correlated genes are significantly enriched in ITGA2B-ITGB3-CIB1 complex, regulation of intracellular protein transport and regulation of ion transport. Conclusions: Our novel findings suggested that CIB1 might be a potential diagnostic predictor for UVM, and might contribute to the potential strategy for UVM treatment by targeting CIB1.
文摘目的:探讨程序性死亡配体1(PD-L1)单克隆抗体是否可以增强ALDH high CSC-DC疫苗致敏的B细胞靶向ALDH high肿瘤干细胞(CSCs)的体液免疫作用。方法:建立B16-F10黑色素瘤小鼠模型,各组小鼠分别接受PBS、ALDH high CSC-DC+IgG、ALDH high CSC-DC疫苗、PD-L1单克隆抗体、ALDH high CSC-DC联合PD-L1单克隆抗体的治疗,记录小鼠的生存时间及肿瘤的体积。实验结束时收集各组小鼠的肿瘤,单个肿瘤细胞悬液进行ALDEFLUOR染色检测CSCs的比例。流式细胞术检测各组小鼠脾脏B细胞上PD-1的表达量。同时进一步行抗体结合试验和补体依赖的细胞毒性作用(CDC)试验检测B细胞培养上清中的抗体结合和裂解CSCs的能力。结果:相较于单独治疗组,PD-L1单克隆抗体与ALDH high CSC-DC疫苗的联合治疗可以更加显著地抑制肿瘤生长,延长小鼠生存时间。联合治疗组小鼠活化的B淋巴细胞上PD-1的表达水平显著降低,仅为6.5%。抗体结合试验提示,与ALDH high CSC-DC疫苗单独治疗组11.3%的结合率相比,联合治疗组小鼠B细胞培养上清中的抗体可以特异地结合15.7%ALDH high CSCs。同时CDC试验结果显示,联合治疗组的B细胞培养上清特异性地裂解ALDH high CSCs。结论:PD-L1单克隆抗体可以显著增强ALDH high CSC-DC疫苗致敏的B细胞产生靶向ALDH high CSCs的体液免疫反应。
基金Supported by Fonds National de la Recherche Scientifique(FNRSBelgium)
文摘Gliomas and melanomas are associated with dismal prognosis because of their marked intrinsic resistance to proapoptotic stimuli,such as conventional chemotherapy and radiotherapy,as well as their ability to escape immune cell attacks.In addition,gliomas and melanomas display pronounced neoangiogenesis.Galectin-1 is a hypoxia-sensitive protein,which is abundantly secreted by glioma and melanoma cells,which displays marked proangiogenic effects.It also provides immune tolerogenic environments to melanoma and glioma cells through the killing of activated T cells that attack these tumor cells.Galectin-1 protects glioma and melanoma cells against cytotoxic insults(including chemotherapy and radiotherapy) through a direct role in the unfolded protein response.Altogether,these facts clearly point to galectin-1 as an important target to be combated in gliomas and melanomas in order to:(1) weaken the defenses of these two types of cancers against radiotherapy,chemotherapy and immunotherapy/vaccine therapy;and(2) reinforce antiangiogenic therapies.In the present article,we review the biochemical and molecular biology-related pathways controlled by galectin-1,which are actually beneficial for melanoma and glioma cells,and therefore detrimental for melanoma and glioma patients.
基金Supported by the National Natural Science Foundation of China (No.81570891 No.81272981)+3 种基金Beijing Natural Science Foundation (No.7151003)Advanced Health Care Professionals Development Project of Beijing Municipal Health Bureau (No.2014-2-003)the Capital Health Research and Development of Special (No.2016-1-2051)Hospitals’ Ascent Plan (No.DFL20150201)
文摘AIM： To reveal the insight mechanism of liver metastasis in uveal melanoma, we investigated cell functions of microRNA-21 in three different uveal melanoma cell lines and analyze the relationship of target gene p53 and its downstream targets which been found significant expression in our previous study.METHODS： Quantitative real-time polymerase chain reaction （qRT-PCR） was used to detect microRNA-21 expression in normal uveal tissue and uveal melanoma cell lines. Lenti-virus expression system was used to construct OCM-1, MuM-2B and M619 cell line with stable overexpression and inhibition of microRNA-21. In vitro cell function tests such as cell proliferation, cell apoptosis, cell circle and abilities of migration and invasion were examined by MTT, BrdU assay, flow cytometry, transwell assay and Matrigel invasion assay respectively. The target gene was predicted by bioinformatics and confirmed by using a dual luciferase reporter assay. The expression of p53 and its suspected downstream targets LIM and SH3 protein 1 （LASP1） and Glutathione S Transferase pi （GST-Pi） were determined by qRT-PCR in mRNA level and western blotting analysis in protein level. Finally, the effect of microRNA-21 in a xenograft tumor model was assessed in four-week-old BALB/c nude mice. RESULTS： Compared to normal uveal melanoma, expressions of microRNA-21 were significantly higher in uveal melanoma cell lines. Overexpression of microRNA-21 promoted proliferation, migration, and invasion of OCM-1, M619 and MuM-2B cells, while inhibition of microRNA-21 reveal opposite effects. Wild type p53 was identified as a target gene of microRNA-21-3p, and proved by dual luciferase reporter assay. Up-regulated microRNA-21 inhibited the expression of wild type p53 gene, and the increased expression of LASP1 in mRNA level and protein level, while down-regulated microRNA-21 presented opposite way. However, GST-pi showed the potential pattern as expected, but relative mRNA level showed no statistically significant difference in OCM-1 cells. Furthermore, the mRNA expression of GST-pi was decreased in microRNA-21 overexpressing MuM-2B, and increased in M619 cells with inhibition of microRNA-21. In vivo, inhibition of microRNA-21 reduced tumor growth with statistically significant difference.CONCLUSION： These findings provide novel insight into molecular etiology of microRNA-21 in uveal melanoma cell lines, and suggest that microRNA-21 might be a potential candidate for the diagnosis and prognostic factor of human uveal melanoma in future.
基金Supported by National Natural Science Foundation of China(No.81570891)Beijing Natural Science Foundation(No.7204245+6 种基金No.7151003)Scientific Research Common Program of Beijing Municipal Commission of Education(No.KM202010025018)Beijing Municipal Administration of Hospitals’Youth Programme(No.QMS20190202)Beijing Municipal Administration of Hospitals,Ascent Plan(No.DFL20150201)Advanced Health Care Professionals Development Project of Beijing Municipal Health Bureau(2014-2-003)The Capital Health Research and Development of Special(2016-1-2051)Beijing Dongcheng District Outstanding Talents Cultivating Plan(2018)。
文摘AIM:To investigate the role of microRNA-145(miRNA-145)and microRNA-205(miRNA-205)in proliferation and invasion of uveal melanoma(UM)cells.METHODS:The expression level of miRNA-145 and miR NA-205 from samples of UM patients were determined by real-time polymerase chain reaction(RT-PCR).The growth and invasion inhibitory effects were observed by the transfection of UM cells with miRNA-145 and miRNA-205.Several epithelial-to-mesenchymal transition(EMT)-related proteins were screened by Western blotting.UM clinical samples from The Cancer Genome Atlas(TCGA)were applied to search for potential protein interaction.Pearson’s correlation analysis was applied to estimate co-expression between genes.Dual-luciferase reporter assay was used to verify the binding sites on target protein for miRNA-145 and miRNA-205.RESULTS:The expression levels of miRNA-145 and miRNA-205 in the samples from patients with UM were significantly lower than those in the normal tissue samples.Significant growth and invasion inhibitory effects were observed in human UM cells with miRNA-145 and miR NA-205 overexpression.The miRNA-145 and miRNA-205 could decrease the expression level of cell division control protein 42(CDC42).After database searching and sequence alignment,we identified that Neuropilin 1(NRP1)had binding sites for both miRNA-145 and miRNA-205.CONCLUSION:The miRNA-145 and miRNA-205 can reduce the proliferation,migration and invasion of UM cells by targeting the mRNA of its upstream protein NRP1 to down-regulate the expression level of CDC42.
基金This project was supported by a grant from National Natural Sciences Foundation of China (No 30671891)
文摘In order to investigate the expression of endothelin receptor B （ETR-B） in human malignant melanoma （MM） cells A375 and SK-mel-1 and the proliferative effects of endothelin 3 （ET3） on A375 cells, RT-PCR was applied to detect the expression of ETR-B gene in human MM cells A375 and SK-mel-1. MTT method was used to evaluate the growth enhancing effects of ET3 on A375 cell line in vitro. The results showed that ETR-B gene was expressed in both MM A375 and SK-mel-1 cells. ET3 had stronger ability to enhance the proliferation of A375 cells in vitro in a concentration-dependent manner. It was suggested that ET3/ETR-B might play an important proliferative role in MM.
基金Supported by Grant-in-Aid for research by the Kitasato University Medical Center,No.H26-008the JSPS KAKENHI,No.17K16578+3 种基金the JSPS KAKENHI,No.26670609Takeda Science FoundationKitasato University Research Grant for Young ResearchersGrant-in-Aid for research from the Kitasato University Medical Center,No.H25-0006
文摘BACKGROUND The ABCD stratification[combination of serum pepsinogen(PG)levels and titers of antibody(immunoglobulin G,IgG)against Helicobacter pylori(H.pylori)]is effective for the classification of individuals at risk of developing gastric cancer(GC).The Kita–Kyushu lung cancer antigen-1(KK-LC-1)is a Cancer/Testis antigen frequently expressed in GC.AIM To evaluate the effectiveness of KK-LC-1 and ABCD stratification in the diagnosis of GC.METHODS We analyzed the gene expression of KK-LC-1 in surgical specimens obtained from GC tumors.The levels of serum PG I/PG II and IgG against H.pylori were measured.According to their serological status,the patients were classified into the four groups of the ABCD stratification.RESULTS Of the 77 examined patients,63(81.8%)expressed KK-LC-1.The IgG titers of H.pylori and PG II were significantly higher in patients expressing KK-LC-1 than those measured in patients not expressing KK-LC-1(P=0.0289 and P=0.0041,respectively).The expression of KK-LC-1 in group C[PG method(+)/H.pylori infection(+)]was as high as 93.9%high.KK-LC-1 was also detected in group A[-/-].CONCLUSION The KK-LC-1 expression in GC was associated with H.pylori infection and atrophic status,so that,KK-LC-1 may be a useful marker for the diagnosis of GC.
基金supported by Natural Science Foundation of Jiangsu Province(BK2011049)Jiangsu"333"Projects in Jiangsu Province(BK201140032)Innovation Fund ofYangzhou University(2012CXJ085)
文摘The mortality of cancer patients has considerably improved due to progress in surgery, chemotherapy and radiotherapy. However, some types of cancers, such as melanoma, remain refractory to conventional strategies. Although melanoma accounts for only 4% of all dermatological malignancies, it is responsible for 80% of mortalities from skin tumors[11. The reported survival rate of melanoma over 5 years is not yet encouraging due to its chemo-resistance and rapid metastasis. Therefore, it is necessary to develop new drugs with potent activity and weak side-effect against melanoma.
基金This work was supported by the CAMS Innovation Fund for Medical Sciences[2017-I2M-1-010].
文摘Programmed cell death protein 1(PD-1)/programmed cell death ligand 1(PD-L1)blockade is an important therapeutic strategy for melanoma,despite its low clinical response.It is important to identify genes and pathways that may reflect the clinical outcomes of this therapy in patients.We analyzed clinical dataset GSE96619,which contains clinical information from five melanoma patients before and after anti-PD-1 therapy(five pairs of data).We identified 704 DEGs using these five pairs of data,and then the number of DEGs was narrowed down to 286 in patients who responded to treatment.Next,we performed KEGG pathway enrichment and constructed a DEG-associated protein-protein interaction network.Smooth muscle actin 2(ACTA2)and tyrosine kinase growth factor receptor(KDR)were identified as the hub genes,which were significantly downregulated in the tumor tissue of the two patients who re-sponded to treatment.To confirm our analysis,we demonstrated similar expression tendency to the clinical data for the two hub genes in a B16F10 subcutaneous xeno-graft model.This study demonstrates that ACTA2 and KDR are valuable responsive markers for PD-1/PD-L1 blockade therapy.
文摘Abnormal regulation of apoptosis is an important aspect of tumour development. Capsaicin, an extract of red chilli peppers, has been shown to inhibit growth of melanoma and other malignant cell lines and HA14-1 is an organic compound that directly induces apoptosis by binding to Bcl-2 protein. The aim of this work was to investigate whether combination therapy with capsaicin and HA14-1 might hold any promise for the treatment of melanoma. Three melanoma cell lines of a range of aggressive potential, melanocytes and fibroblasts were examined, looking at the effects of both drugs singly and in combination on cell viability and induction of apoptosis. This comparative study showed that melanoma cells and melanocytes have a similar sensitivity to capsaicin while fibroblasts are more resistant to it. HA14-1, as expected, induced apoptosis in all cells at relatively low concentrations. A combination of the two agents produced the expected results of an additive effect for 2 (HBL and A375SM) out of 3 melanoma cell lines in inducing apoptosis, but encouragingly for the most metastatically aggressive cancer cell line (C8161), a combination of the two showed a synergistic induction of apoptosis.
