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1.
Cell Mol Life Sci ; 81(1): 247, 2024 Jun 03.
Article in English | MEDLINE | ID: mdl-38829550

ABSTRACT

BACKGROUND: The high degree of intratumoral genomic heterogeneity is a major obstacle for glioblastoma (GBM) tumors, one of the most lethal human malignancies, and is thought to influence conventional therapeutic outcomes negatively. The proneural-to-mesenchymal transition (PMT) of glioma stem cells (GSCs) confers resistance to radiation therapy in glioblastoma patients. POLD4 is associated with cancer progression, while the mechanisms underlying PMT and tumor radiation resistance have remained elusive. METHOD: Expression and prognosis of the POLD family were analyzed in TCGA, the Chinese Glioma Genome Atlas (CGGA) and GEO datasets. Tumorsphere formation and in vitro limiting dilution assay were performed to investigate the effect of UCHL3-POLD4 on GSC self-renewal. Apoptosis, TUNEL, cell cycle phase distribution, modification of the Single Cell Gel Electrophoresis (Comet), γ-H2AX immunofluorescence, and colony formation assays were conducted to evaluate the influence of UCHL3-POLD4 on GSC in ionizing radiation. Coimmunoprecipitation and GST pull-down assays were performed to identify POLD4 protein interactors. In vivo, intracranial xenograft mouse models were used to investigate the molecular effect of UCHL3, POLD4 or TCID on GCS. RESULT: We determined that POLD4 was considerably upregulated in MES-GSCs and was associated with a meagre prognosis. Ubiquitin carboxyl terminal hydrolase L3 (UCHL3), a DUB enzyme in the UCH protease family, is a bona fide deubiquitinase of POLD4 in GSCs. UCHL3 interacted with, depolyubiquitinated, and stabilized POLD4. Both in vitro and in vivo assays indicated that targeted depletion of the UCHL3-POLD4 axis reduced GSC self-renewal and tumorigenic capacity and resistance to IR treatment by impairing homologous recombination (HR) and nonhomologous end joining (NHEJ). Additionally, we proved that the UCHL3 inhibitor TCID induced POLD4 degradation and can significantly enhance the therapeutic effect of IR in a gsc-derived in situ xenograft model. CONCLUSION: These findings reveal a new signaling axis for GSC PMT regulation and highlight UCHL3-POLD4 as a potential therapeutic target in GBM. TCID, targeted for reducing the deubiquitinase activity of UCHL3, exhibited significant synergy against MES GSCs in combination with radiation.


Subject(s)
Neoplastic Stem Cells , Radiation Tolerance , Ubiquitin Thiolesterase , Humans , Ubiquitin Thiolesterase/metabolism , Ubiquitin Thiolesterase/genetics , Radiation Tolerance/genetics , Neoplastic Stem Cells/metabolism , Neoplastic Stem Cells/pathology , Neoplastic Stem Cells/radiation effects , Animals , Mice , Cell Line, Tumor , Glioma/pathology , Glioma/genetics , Glioma/radiotherapy , Glioma/metabolism , Apoptosis/genetics , Apoptosis/radiation effects , Ubiquitination , Brain Neoplasms/pathology , Brain Neoplasms/metabolism , Brain Neoplasms/genetics , Brain Neoplasms/radiotherapy , Mice, Nude , Phenotype , Gene Expression Regulation, Neoplastic , Prognosis
2.
Nano Lett ; 24(15): 4672-4681, 2024 Apr 17.
Article in English | MEDLINE | ID: mdl-38587873

ABSTRACT

The bifunctional oxygen electrocatalyst is the Achilles' heel of achieving robust reversible Zn-air batteries (ZABs). Herein, durable bifunctional oxygen electrocatalysis in alkaline media is realized on atomic Fe-N4-C sites reinforced by NixCo3-xO4 (NixCo3-xO4@Fe1/NC). Compared with that of pristine Fe1/NC, the stability of the oxygen evolution reaction (OER) is increased 10 times and the oxygen reduction reaction (ORR) performance is also improved. The steric hindrance alters the valence electron at the Fe-N4-C sites, resulting in a shorter Fe-N bond and enhanced stability of the Fe-N4-C sites. The corresponding solid-state ZABs exhibit an ultralong lifespan (>460 h at 5 mA cm-2) and high rate performance (from 2 to 50 mA cm-2). Furthermore, the structural evolution of NixCo3-xO4@Fe1/NC before and after the OER and ORR as well as charge-discharge cycling is explored. This work develops an efficient strategy for improving bifunctional oxygen electrocatalysis and possibly other processes.

3.
Neoplasma ; 68(4): 732-741, 2021 Jul.
Article in English | MEDLINE | ID: mdl-33847130

ABSTRACT

Protein- or peptide-based therapeutics have emerged as an innovative strategy for the treatment of cancer. Our previous research demonstrated that tripartite motif 9 short isoform (TRIM9s) is a tumor suppressor in glioma. In this report, we investigated whether a new peptide derived from TRIM9s, named T9sP, inhibits glioma progression and determined the possible molecular mechanism. The CCK-8 proliferation assay was performed in LN229 and U251 glioma cells. The scratch-wound assay was used to determine the migration of the cells. Apoptosis was assessed by flow cytometry using Annexin V-FITC/PI double staining method. The relative protein expression levels were detected by immunoblot analysis. The cell-penetrating peptide TAT was fused with T9sP to form TAT-T9sP. TAT-T9sP efficiently penetrated through the cell membrane of both LN229 and U251 cells. TAT-T9sP inhibited proliferation and migration and promoted apoptosis of glioma cells. TAT-T9sP activated p38 signaling by upregulating MKK6, and a p38 inhibitor, SB203580, reversed the inhibitory effects of TAT-T9sP on glioma cells. These results indicated the potential of TAT-T9sP for the development of a new anti-glioma medicine.


Subject(s)
Brain Neoplasms , Glioma , Apoptosis , Brain Neoplasms/drug therapy , Cell Line, Tumor , Cell Movement , Cell Proliferation , Glioma/drug therapy , Humans , Peptides/pharmacology , Signal Transduction
4.
Cancer Cell Int ; 19: 280, 2019.
Article in English | MEDLINE | ID: mdl-31708690

ABSTRACT

BACKGROUND: Glioma is the most common central nervous system (CNS) tumour. p62, an important autophagy adaptor, plays a crucial role in cancer. However, the role of p62 in the progression of glioma is poorly characterized. METHODS: We examined the expression of p62 in glioma tissues and cell lines. Then we investigated the function of p62 in vitro, and clarified the mechanism underlying the regulation of p62 expression. RESULTS: We revealed that p62 was upregulated at both the mRNA and protein levels in human glioma tissues irrelevant to isocitrate dehydrogenase (IDH) status. Then, we found that overexpression of p62 promoted glioma progression by promoting proliferation, migration, glycolysis, temozolomide (TMZ) resistance and nuclear factor κB (NF-κB) signalling pathway, and repressing autophagic flux and reactive oxygen species (ROS) in vitro. In accordance with p62 overexpression, knockdown of p62 exerted anti-tumour effects in glioma cells. Subsequently, we demonstrated that miR-124-3p directly targeted the 3'-UTR of p62 mRNA, leading to the downregulation of p62. Finally, we found that p62 function could be partially reversed by miR-124-3p overexpression. CONCLUSIONS: Our results demonstrate that p62 can be targeted by miR-124-3p and acts as an oncogene in glioma, suggesting the potential value of p62 as a novel therapeutic target for glioma.

5.
Cancer Sci ; 107(7): 899-907, 2016 Jul.
Article in English | MEDLINE | ID: mdl-27088547

ABSTRACT

The PIM1 protein is an important regulator of cell proliferation, the cell cycle, apoptosis, and metabolism in various human cancers. MicroRNAs (miRNAs) are powerful post-transcriptional gene regulators that function through translational repression or transcript destabilization. Therefore, we aimed to identify whether a close relationship exists between PIM1 and miRNAs. PIM1 protein levels and mRNA levels were significantly upregulated in astrocytoma tissues, indicating the oncogenic role of PIM1 in astrocytoma. Further bioinformatics analysis indicated that miR-124-3p targeted the 3'-UTR of PIM1. We also observed an inverse correlation between the miR-124-3p levels and PIM1 protein or mRNA levels in astrocytoma samples. Next, we experimentally confirmed that miR-124-3p directly recognizes the 3'-UTR of the PIM1 transcript and regulates PIM1 expression at both the protein and mRNA levels. Furthermore, we examined the biological consequences of miR-124-3p targeting PIM1 in vitro. We showed that the repression of PIM1 in astrocytoma cancer cells by miR-124-3p suppressed proliferation, invasion, and aerobic glycolysis and promoted apoptosis. We observed that the restoration or inhibition of PIM1 activity resulted in effects that were similar to those induced by miR-124-3p inhibitors or mimics in cancer cells. Finally, overexpression of PIM1 rescued the inhibitory effects of miR-124-3p. In summary, these findings aid in understanding the tumor-suppressive role of miR-124-3p in astrocytoma pathogenesis through the inhibition of PIM1 translation.


Subject(s)
Apoptosis/genetics , Astrocytoma/genetics , Astrocytoma/pathology , Energy Metabolism/genetics , MicroRNAs/genetics , Neoplasm Invasiveness/genetics , Proto-Oncogene Proteins c-pim-1/genetics , Proto-Oncogene Proteins c-pim-1/metabolism , 3' Untranslated Regions/genetics , Cell Line, Tumor , Cell Proliferation/genetics , Gene Expression Regulation, Neoplastic , Humans , Protein Biosynthesis , Proto-Oncogene Proteins c-pim-1/biosynthesis , Up-Regulation
6.
Cell Physiol Biochem ; 39(3): 1118-28, 2016.
Article in English | MEDLINE | ID: mdl-27576463

ABSTRACT

BACKGROUND: Hypoxic/ischemic injury to the heart is a frequently encountered clinical problem with limited therapeutic options. Since microRNAs (miRNAs) are involved in hypoxic/ischemic events, and δ-opioid receptor (DOR) activation is known to protect against hypoxic/ischemic injury, we speculated on the involvement of DOR activation in altering miRNA expression in the heart under hypoxic conditions. The present study aimed to test our hypothesis. METHODS: Male Sprague Dawley rats were exposed to hypoxia (9.5-10% O2) for 1, 5, or 10 days with or without DOR activation. The target miRNAs were selected from TaqMan low-density array (TLDA) data and were further analyzed by quantitative real-time PCR. RESULTS: We found that: 1) hypoxia alters the miRNA expression profiles depending on the hypoxic duration; 2) DOR activation shifts miRNA expression profiles in normoxic conditions and upregulates miR-128a-3p, miR-134-5p, miR-135a, miR-193a-3p, miR-196a, miR-324-3p, and miR-338; and 3) DOR activation modifies hypoxia-induced changes in miRNA expression and increases the levels of miR-128a-3p, miR-134-5p, miR-135a, miR-193a-3p, miR-196a, miR-324-3p, miR-141, miR-200b, and miR-324-3p. For example, miR-196c-5p decreased by 50% while miR-135a-5p increased 2.9 fold after 10 days under hypoxic conditions. Moreover, DOR activation further strengthened the hypoxia-induced increase of the levels of miR-7a-5p. When DOR was activated using UFP-512, the level of miR-107-3p significantly increased 1 day after the administration of UFP-512, but gradually decreased back to normal under normoxia. CONCLUSION: Hypoxia significantly modifies the miRNA profile in the heart, which can be mimicked or modified by DOR activation. Defining the targeted pathways that regulate the diverse cellular and molecular functions of miRNAs may provide new insights into potential therapies for hypoxic/ischemic injury of the heart.


Subject(s)
Hypoxia/genetics , MicroRNAs/genetics , Myocardial Ischemia/genetics , Myocardium/metabolism , Receptors, Opioid, delta/genetics , Animals , Benzimidazoles/pharmacology , Gene Expression Profiling , Gene Expression Regulation , Hypoxia/metabolism , Hypoxia/pathology , Male , MicroRNAs/metabolism , Myocardial Ischemia/metabolism , Myocardial Ischemia/pathology , Myocardium/pathology , Oligonucleotide Array Sequence Analysis , Oligopeptides/pharmacology , Rats , Rats, Sprague-Dawley , Real-Time Polymerase Chain Reaction , Receptors, Opioid, delta/agonists , Receptors, Opioid, delta/metabolism , Signal Transduction
7.
Tumour Biol ; 37(3): 3331-40, 2016 Mar.
Article in English | MEDLINE | ID: mdl-26440052

ABSTRACT

Astrocytoma is one of the most common primary central nervous system tumors and has both high mortality and a poor 5-year survival rate. MicroRNAs (miRNAs) play important roles in carcinogenesis by acting on multiple signaling pathways. Although we have demonstrated that miR-137 is downregulated in astrocytoma tissues, the role of miR-137 in astrocytoma still remains unknown. In the present study, we aimed to investigate the function of miR-137 and its possible target genes in astrocytoma. miR-137 was significantly downregulated in astrocytoma tissues, and its expression level was inversely correlated with the clinical stage. Restoring miR-137 was able to dramatically inhibit cell proliferation, migration, and invasion and enhance apoptosis in vitro, whereas silencing its expression inhibited these processes. By overexpressing or inhibiting miR-137 in cancer cells, we experimentally confirmed that miR-137 directly recognized the 3'-UTR (3'-untranslated region) of the RASGRF1 (Ras protein-specific guanine nucleotide-releasing factor 1) transcript and regulated RASGRF1 expression. Furthermore, an inverse correlation was observed between miR-137 levels and RASGRF1 protein levels, but not mRNA levels, in astrocytoma samples. The silencing of RASGRF1 resulted in similar effects to miR-137 restoration in cancer cells. Finally, overexpression of RASGRF1 rescued the inhibitory effects of miR-137. Taken together, our results indicate that miR-137 acts as a tumor suppressor in astrocytoma by targeting RASGRF1. These findings suggest that miR-137 may serve as a novel therapeutic target in astrocytoma treatment.


Subject(s)
3' Untranslated Regions/genetics , Astrocytoma/genetics , Gene Expression Regulation, Neoplastic , MicroRNAs/genetics , ras-GRF1/genetics , Apoptosis/genetics , Astrocytoma/metabolism , Astrocytoma/pathology , Blotting, Western , Cell Line, Tumor , Cell Movement/genetics , Cell Proliferation/genetics , Down-Regulation , Genes, Tumor Suppressor , Humans , Neoplasm Invasiveness , Reverse Transcriptase Polymerase Chain Reaction , ras-GRF1/metabolism
8.
Neurochem Res ; 39(4): 613-23, 2014 Apr.
Article in English | MEDLINE | ID: mdl-24477657

ABSTRACT

Neuroblastoma, a malignant embryonal tumor of the sympathetic nervous system, is the most common solid extracranial malignancy of childhood and accounts for 15 % of all childhood cancer deaths. The biological behavior of neuroblastoma is extensively heterogeneous, ranging from spontaneous regression to rapid progression despite multimodal aggressive therapy. Although the molecular basis of neuroblastoma has received considerable attention over the past decade, elucidating the mechanisms for the aggressive progression of neuroblastoma is needed for improving the efficacy of treatment. miRNAs (microRNAs) are small non-coding RNA molecules generally 19-22 nucleotides in length. miRNAs regulate 60 % of human gene expression at the post-transcriptional level by targeting regions of sequence complementarity on the 3'-untranslated regions (3'-UTRs) of specific mRNAs. miRNAs can either cause degradation of mRNAs or can inhibit their translation and therefore play major roles in normal growth and development. miRNA dysregulation has oncogenic or tumor-suppressive functions in virtually all forms of cancer, including neuroblastoma. The present review highlights the current insights on dysregulated miRNAs in neuroblastoma and on their roles in the diagnosis, prognosis, and treatment of this malignancy. As a rapidly evolving field of basic and biomedical sciences, miRNA research holds a great potential to impact on the management of neuroblastoma.


Subject(s)
Biomarkers, Tumor/genetics , Gene Expression Regulation, Neoplastic , MicroRNAs/genetics , Neuroblastoma/diagnosis , Neuroblastoma/genetics , Animals , Cell Differentiation/physiology , Humans
9.
PLoS One ; 19(7): e0306667, 2024.
Article in English | MEDLINE | ID: mdl-38950023

ABSTRACT

[This corrects the article DOI: 10.1371/journal.pone.0109124.].

10.
Int Immunopharmacol ; 128: 111374, 2024 Feb 15.
Article in English | MEDLINE | ID: mdl-38181672

ABSTRACT

Despite the clinical breakthrough made by immune checkpoint blockades (ICB) in cancer immunotherapy, immunosuppressed tumor microenvironment (TME) remains a major impediment in the efficacy of ICB immunotherapy. In this study, we constructed a Nitrated T cell epitope (NitraTh) linked vaccine targeting CD47, namely CD47-NitraTh. CD47-NitraTh could repress the progression of tumor by inducing tumor-specific immune response. Furthermore, combination vaccination with CD47-NitraTh and PDL1-NitraTh could reconstruct tumor associated macrophage, enhance macrophage-mediated phagocytosis for tumor cells, and promote the activation of tumor infiltrating T cells. Notably, by activating chemokine signaling pathway, NitraTh based vaccines reversed immunosuppressed TME, resulting in improved therapeutic outcome for tumor. With the advantage of reversing immunosuppressed TME, NitraTh based vaccine seems an optimal immunotherapy strategy for patients who are not sensitive to antibody based ICB.


Subject(s)
Cancer Vaccines , Neoplasms , Humans , CD47 Antigen , Epitopes, T-Lymphocyte , Immunotherapy/methods , Nitrates , Phagocytosis , Tumor Microenvironment , Cancer Vaccines/immunology
11.
Cancer Lett ; 593: 216875, 2024 Jul 01.
Article in English | MEDLINE | ID: mdl-38643837

ABSTRACT

Mesenchymal glioma stem cells (MES GSCs) are a subpopulation of cells in glioblastoma (GBM) that contribute to a worse prognosis owing to their highly aggressive nature and resistance to radiation therapy. Here, OCT4 is characterized as a critical factor in sustaining the stemness phenotype of MES GSC. We find that OCT4 is expressed intensively in MES GSC and is intimately associated with poor prognosis, moreover, OCT4 depletion leads to diminished invasive capacity and impairment of the stem phenotype in MES GSC. Subsequently, we demonstrated that USP5 is a deubiquitinating enzyme which directly interacts with OCT4 and preserves OCT4 stability through its deubiquitination. USP5 was additionally proven to be aberrantly over-expressed in MES GSCs, and its depletion resulted in a noticeable diminution of OCT4 and consequently a reduced self-renewal and tumorigenic capacity of MES GSCs, which can be substantially restored by ectopic expression of OCT4. In addition, we detected the dominant molecule that regulates USP5 transcription, E2F1, with dual luciferase reporter gene analysis. In combination, targeting the E2F1-USP5-OCT4 axis is a potentially emerging strategy for the therapy of GBM.


Subject(s)
Brain Neoplasms , E2F1 Transcription Factor , Neoplastic Stem Cells , Octamer Transcription Factor-3 , Ubiquitin-Specific Proteases , Humans , Octamer Transcription Factor-3/genetics , Octamer Transcription Factor-3/metabolism , Neoplastic Stem Cells/pathology , Neoplastic Stem Cells/metabolism , Animals , E2F1 Transcription Factor/metabolism , E2F1 Transcription Factor/genetics , Brain Neoplasms/pathology , Brain Neoplasms/genetics , Brain Neoplasms/metabolism , Ubiquitin-Specific Proteases/genetics , Ubiquitin-Specific Proteases/metabolism , Glioma/pathology , Glioma/genetics , Glioma/metabolism , Cell Line, Tumor , Gene Expression Regulation, Neoplastic , Mice , Protein Stability , Glioblastoma/pathology , Glioblastoma/genetics , Glioblastoma/metabolism , Ubiquitination
12.
ACS Nano ; 18(13): 9678-9687, 2024 Apr 02.
Article in English | MEDLINE | ID: mdl-38522087

ABSTRACT

The unsatisfactory adsorption and activation of CO2 suppress electrochemical reduction over a wide potential window. Herein, the built-in electric field (BIEF) at the CeO2/In2O3 n-n heterostructure realizes the C1 (CO and HCOO-) selectivity over 90.0% in a broad range of potentials from -0.7 to -1.1 V with a maximum value of 98.7 ± 0.3% at -0.8 V. In addition, the C1 current density (-1.1 V) of the CeO2/In2O3 heterostructure with a BIEF is about 2.0- and 3.2-fold that of In2O3 and a physically mixed sample, respectively. The experimental and theoretical calculation results indicate that the introduction of CeO2 triggered the charge redistribution and formed the BIEF at the interfaces, which enhanced the interfacial adsorption and activation of CO2 at low overpotentials. Furthermore, the promoting effect was also extended to CeO2/In2S3. This work gives a deep understanding of BIEF engineering for highly efficient CO2 electroreduction over a wide potential window.

13.
ACS Nano ; 17(19): 18688-18705, 2023 Oct 10.
Article in English | MEDLINE | ID: mdl-37725796

ABSTRACT

Electrochemical CO2 reduction (ECO2R) with renewable electricity is an advanced carbon conversion technology. At present, copper is the only metal to selectively convert CO2 into multicarbon (C2+) products. Among them, atomically dispersed (AD) Cu catalysts have received great attention due to the relatively single chemical environment, which are able to minimize the negative impact of morphology, valence state, and crystallographic properties, etc. on product selectivity. Furthermore, the completely exposed atomic Cu sites not only provide space and bonding electrons for the adsorption of reactants in favor of better catalytic activity but also provide an ideal platform for studying its reaction mechanism. This review summarizes the recent progress of AD Cu catalysts as a chemically tunable platform for ECO2R, including the atomic Cu sites dynamic evolution, the catalytic performance, and mechanism. Furthermore, the prospects and challenges of AD Cu catalysts for ECO2R are carefully discussed. We sincerely hope that this review can contribute to the rational design of AD Cu catalysts with enhanced performance for ECO2R.

14.
Chem Commun (Camb) ; 59(87): 13034-13037, 2023 Oct 31.
Article in English | MEDLINE | ID: mdl-37842963

ABSTRACT

It is an urgent need to improve the depth of discharge (DOD) of Zn-air batteries (ZABs), considering that most reported ZABs with long cycle life are realized at low DOD (<1%). In this work, our solid-state ZABs achieved a long cycle life of more than 220 h at 3.2% DOD (the discharge capacity of 10 mA h cm-2 per cycle). Moreover, benefiting from excellent bifunctional oxygen electrocatalysts (Fe@BNC) and robust Zn|electrolyte interface, the ZABs displayed a long cycle life of 120 h even at high DOD of 23.4% and large discharge capacity of 72 mA h cm-2. Additionally, the impact of Zn|electrolyte interface on the cycle time at different DODs is analysed and discussed. The unstable interface exacerbated the dendrite growth and uneven deposition of Zn at high DOD, leading to the decay of the cycle life. The work gives insights into the mechanism of the effect of DOD on the cycle life of the batteries.

15.
Epigenetics ; 18(1): 2175565, 2023 12.
Article in English | MEDLINE | ID: mdl-36908025

ABSTRACT

Platinum-based chemotherapy is one of the predominant strategies for treating ovarian cancer (OC), however, platinum resistance greatly influences the therapeutic effect. Circular RNAs (circRNAs) have been found to participate in the pathogenesis of platinum resistance. Our aim was to explore the involvement of circ_0078607 in OC cell cisplatin (DDP) resistance and its potential mechanisms. Circ_0078607, miR-196b-5p, and growth arrest-specific 7 (GAS7) levels were assessed by qPCR. Circ_0078607 stability was assessed by ribonuclease R digestion and actinomycin D treatment. Cell viability of various conic of DDP treatment was measured by CCK-8. The cell proliferation was determined by CCK-8 and colony formation assay. Western blotting was performed for determining GAS7, ABCB1, CyclinD1 and Bcl-2 protein levels. The direct binding between miR-196b-5p and circ_0078607 or GAS7 was validated by dual-luciferase reporter and RIP assay. DDP resistance in vivo was evaluated in nude mice. Immunohistochemistry staining for detecting Ki67 expression in xenograft tumours. Circ_0078607 and GAS7 was down-regulated, but miR-196b-5p was up-regulated in OC samples and DDP-resistant cells. Overexpression of circ_0078607 inhibited DDP resistance, cell growth and induced apoptosis in DDP-resistant OC cells. Mechanistically, circ_0078607 sequestered miR-196b-5p to up-regulate GAS7. MiR-196b-5p mimics reversed circ_0078607 or GAS7 overexpression-mediated enhanced sensitivity. Finally, circ_0078607 improved the sensitivity of DDP in vivo. Circ_0078607 attenuates DDP resistance via miR-196b-5p/GAS7 axis, which highlights the therapeutic potential of circ_0078607 to counter DDP resistance in OC.


Subject(s)
MicroRNAs , Nerve Tissue Proteins , Ovarian Neoplasms , Platinum , RNA, Circular , Animals , Female , Humans , Mice , Cell Proliferation , Cisplatin , DNA Methylation , Drug Resistance, Neoplasm , Mice, Nude , MicroRNAs/genetics , Nerve Tissue Proteins/genetics , Ovarian Neoplasms/drug therapy , Ovarian Neoplasms/genetics , Platinum/pharmacology , RNA, Circular/genetics
16.
Chem Commun (Camb) ; 58(91): 12716-12719, 2022 Nov 15.
Article in English | MEDLINE | ID: mdl-36314279

ABSTRACT

Electrocatalytic CO2 reduction has received great attention for alleviating environmental problems and energy crisis. SnO2-based catalysts are attractive candidates, but they still face problems such as high overpotentials and small current density due to their low intrinsic electrical conductivity and weak activation for CO2. Here, superior selectivity and activity for C1 products (HCOO- and CO) were obtained using In-doped SnO2. The maximum faradaic efficiency was 96.46% at -0.75 V and the partial current density reached -20.12 mA cm-2 at -0.95 V for C1 products. Furthermore, the selectivity for C1 products was over 90% from -0.5 to -1.0 V with a current density of -166.2 mA cm-2 at -1.0 V in flow cells. In ion doping induced electron transfer from Sn species to In and simultaneously generated oxygen vacancies, which improved electrical conductivity and regulated the oxidation state of Sn active sites and provided more active sites. This work emphasizes the role of enhanced electron transfer of catalysts in CO2 electroreduction.

17.
Exp Ther Med ; 21(5): 491, 2021 May.
Article in English | MEDLINE | ID: mdl-33791000

ABSTRACT

Gliomas account for 50% of primary brain tumours in the central nervous system. Small ubiquitin-like modifier 1 pseudogene 3 (SUMO1P3), a newly identified long non-coding RNA (lncRNA), serves an oncogenic role in various types of cancer. The aim of the present study was to investigate the effect of SUMO1P3 on glioma progression. The results demonstrated that SUMO1P3 expression was upregulated in glioma tissues and cell lines. Furthermore, SUMO1P3 was associated with a poor overall survival of patients with glioma. The results of the in vitro cell proliferation and flow cytometry assays demonstrated that SUMO1P3-knockdown suppressed cell proliferation and cell cycle. The results of the wound healing and Transwell assays demonstrated that SUMO1P3-knockdown significantly repressed cell migration and invasion. In addition, SUMO1P3 promoted glioma by regulating the expression levels of ß-catenin, cyclin-D1, N-cadherin and E-cadherin. Overall, the results of the present study suggested that SUMO1P3 may act as an oncogene by regulating cell proliferation, cell cycle, cell migration and invasion in glioma, and may represent a novel diagnostic biomarker and therapeutic target for glioma.

18.
Sci Rep ; 11(1): 5081, 2021 03 03.
Article in English | MEDLINE | ID: mdl-33658585

ABSTRACT

Chronic HBV infection, the main cause of liver cirrhosis and hepatocellular carcinoma, has become a global health concern. Machine learning algorithms are particularly adept at analyzing medical phenomenon by capturing complex and nonlinear relationships in clinical data. Our study proposed a predictive model on the basis of 55 routine laboratory and clinical parameters by machine learning algorithms as a novel non-invasive method for liver fibrosis diagnosis. The model was further evaluated on the accuracy and rationality and proved to be highly accurate and efficient for the prediction of HBV-related fibrosis. In conclusion, we suggested a potential combination of high-dimensional clinical data and machine learning predictive algorithms for the liver fibrosis diagnosis.


Subject(s)
Data Analysis , Hepatitis B virus/immunology , Hepatitis B, Chronic/complications , Liver Cirrhosis/etiology , Machine Learning , Adult , Aged , Bayes Theorem , Biopsy , China/epidemiology , Data Accuracy , Female , Forecasting/methods , Genotype , Hepatitis B virus/genetics , Hepatitis B, Chronic/epidemiology , Hepatitis B, Chronic/virology , Humans , Liver Cirrhosis/epidemiology , Liver Cirrhosis/pathology , Male , Middle Aged , Models, Statistical , ROC Curve , Serologic Tests
19.
Oncotarget ; 9(15): 12112-12124, 2018 Feb 23.
Article in English | MEDLINE | ID: mdl-29552296

ABSTRACT

Malignant glioma is one of the most common types of primary brain tumours. Long non-coding RNAs (lncRNAs) have recently emerged as a new class of therapeutic targets for many cancers. In this study, we aimed to explore the functional involvement of small nucleolar RNA host gene 14 (SNHG14) and its potential regulatory mechanism in glioma progression. SNHG14 was found to be downregulated in human glioma tissues and cell lines. SNHG14 significantly inhibited cell viability, reduced cell invasion, and induced apoptosis in glioma cell lines. Furthermore, a correlation analysis demonstrated that there was a negative correlation between SNHG14 expression and miR-92a-3p expression. Bioinformatics prediction and luciferase reporter assays demonstrated that miR-92a-3p could directly bind to SNHG14. miR-92a-3p was significantly upregulated in glioma and acted as an oncogene in glioma cells by inhibiting Bim. Moreover, mechanistic investigations showed that miR-92a-3p could reverse the tumour suppressive effects induced by SNHG14 in glioma, indicating that SNHG14 may act as an endogenous sponge that competes for binding to miR-92a-3p. Our results suggest that SNHG14 and miR-92a-3p may be promising molecular targets for glioma therapy.

20.
Onco Targets Ther ; 11: 1183-1192, 2018.
Article in English | MEDLINE | ID: mdl-29535541

ABSTRACT

BACKGROUND: Glioblastoma multiforme (GBM) is the most malignant primary tumor of the central nervous system and is associated with a very poor prognosis. No further improvements in outcomes have been reported since radiotherapy-temozolomide therapy was introduced. Therefore, developing new agents to treat GBM is important. AIM: This study aimed to evaluate the anti-tumor effect of evodiamine (Evo) on GBM cells, and to determine the underlying mechanisms involved. RESULTS: According to MTT assay results, Evo significantly inhibited the cell proliferation in a time- and dose-dependent manner. Fluorescence microscopy and flow cytometry analyses revealed that Evo induced cell apoptosis in a concentration-dependent manner. Moreover, Evo induced reactive oxygen species (ROS) production and mitochondrial membrane potential (MMP) disruption. Finally, Evo induced apoptosis in cancer cells by suppressing PI3K/AKT signaling and inducing MAPK phosphorylation (p38 and JNK, but not ERK) to regulate apoptotic proteins (Bax, Bcl-2, Cytochrome c, Caspase-3, and PARP). CONCLUSION: In summary, Evo inhibits cell proliferation by inducing cellular apoptosis via suppressing PI3K/AKT and activating MAPK in GBM; these results indicate that Evo may be regarded as a new approach for GBM treatment.

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