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Seo J, Park M. Molecular crosstalk between cancer and neurodegenerative diseases. Cell Mol Life Sci 2020; 77:2659-2680. [PMID: 31884567 PMCID: PMC7326806 DOI: 10.1007/s00018-019-03428-3] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 12/11/2019] [Accepted: 12/13/2019] [Indexed: 02/07/2023]
Abstract
The progression of cancers and neurodegenerative disorders is largely defined by a set of molecular determinants that are either complementarily deregulated, or share remarkably overlapping functional pathways. A large number of such molecules have been demonstrated to be involved in the progression of both diseases. In this review, we particularly discuss our current knowledge on p53, cyclin D, cyclin E, cyclin F, Pin1 and protein phosphatase 2A, and their implications in the shared or distinct pathways that lead to cancers or neurodegenerative diseases. In addition, we focus on the inter-dependent regulation of brain cancers and neurodegeneration, mediated by intercellular communication between tumor and neuronal cells in the brain through the extracellular microenvironment. Finally, we shed light on the therapeutic perspectives for the treatment of both cancer and neurodegenerative disorders.
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Affiliation(s)
- Jiyeon Seo
- Center for Functional Connectomics, Brain Science Institute, Korea Institute of Science and Technology, Seoul, 02792, South Korea
- Center for Neuroscience, Brain Science Institute, Korea Institute of Science and Technology, Seoul, 02792, South Korea
| | - Mikyoung Park
- Center for Functional Connectomics, Brain Science Institute, Korea Institute of Science and Technology, Seoul, 02792, South Korea.
- Department of Neuroscience, Korea University of Science and Technology, Daejeon, 34113, South Korea.
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2
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Fam83F induces p53 stabilisation and promotes its activity. Cell Death Differ 2019; 26:2125-2138. [PMID: 30692643 DOI: 10.1038/s41418-019-0281-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 01/07/2019] [Accepted: 01/09/2019] [Indexed: 11/08/2022] Open
Abstract
p53 is one of the most important tumour suppressor proteins currently known. It is activated in response to DNA damage and this activation leads to proliferation arrest and cell death. The abundance and activity of p53 are tightly controlled and reductions in p53's activity can contribute to the development of cancer. Here, we show that Fam83F increases p53 protein levels by protein stabilisation. Fam83F interacts with p53 and decreases its ubiquitination and degradation. Fam83F is induced in response to DNA damage and its overexpression also increases p53 activity in cell culture experiments and in zebrafish embryos. Downregulation of Fam83F decreases transcription of p53 target genes in response to DNA damage and increases cell proliferation, identifying Fam83F as an important regulator of the DNA damage response. Overexpression of Fam83F also enhances migration of cells harbouring mutant p53 demonstrating that it can also activate mutant forms of p53.
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3
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Strauss BE, Silva GRO, de Luna Vieira I, Cerqueira OLD, Del Valle PR, Medrano RFV, Mendonça SA. Perspectives for cancer immunotherapy mediated by p19Arf plus interferon-beta gene transfer. Clinics (Sao Paulo) 2018; 73:e479s. [PMID: 30208166 PMCID: PMC6113850 DOI: 10.6061/clinics/2018/e479s] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 05/22/2018] [Indexed: 12/13/2022] Open
Abstract
While cancer immunotherapy has gained much deserved attention in recent years, many areas regarding the optimization of such modalities remain unexplored, including the development of novel approaches and the strategic combination of therapies that target multiple aspects of the cancer-immunity cycle. Our own work involves the use of gene transfer technology to promote cell death and immune stimulation. Such immunogenic cell death, mediated by the combined transfer of the alternate reading frame (p14ARF in humans and p19Arf in mice) and the interferon-β cDNA in our case, was shown to promote an antitumor immune response in mouse models of melanoma and lung carcinoma. With these encouraging results, we are now setting out on the road toward translational and preclinical development of our novel immunotherapeutic approach. Here, we outline the perspectives and challenges that we face, including the use of human tumor and immune cells to verify the response seen in mouse models and the incorporation of clinically relevant models, such as patient-derived xenografts and spontaneous tumors in animals. In addition, we seek to combine our immunotherapeutic approach with other treatments, such as chemotherapy or checkpoint blockade, with the goal of reducing dosage and increasing efficacy. The success of any translational research requires the cooperation of a multidisciplinary team of professionals involved in laboratory and clinical research, a relationship that is fostered at the Cancer Institute of Sao Paulo.
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Affiliation(s)
- Bryan E Strauss
- Laboratório de Vetores Virais, Centro de Investigação Translacional em Oncologia, Instituto do Cancer do Estado de Sao Paulo (ICESP), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
- *Corresponding author. E-mail: /
| | - Gissele Rolemberg Oliveira Silva
- Laboratório de Vetores Virais, Centro de Investigação Translacional em Oncologia, Instituto do Cancer do Estado de Sao Paulo (ICESP), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Igor de Luna Vieira
- Laboratório de Vetores Virais, Centro de Investigação Translacional em Oncologia, Instituto do Cancer do Estado de Sao Paulo (ICESP), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Otto Luiz Dutra Cerqueira
- Laboratório de Vetores Virais, Centro de Investigação Translacional em Oncologia, Instituto do Cancer do Estado de Sao Paulo (ICESP), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Paulo Roberto Del Valle
- Laboratório de Vetores Virais, Centro de Investigação Translacional em Oncologia, Instituto do Cancer do Estado de Sao Paulo (ICESP), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Ruan Felipe Vieira Medrano
- Laboratório de Vetores Virais, Centro de Investigação Translacional em Oncologia, Instituto do Cancer do Estado de Sao Paulo (ICESP), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Samir Andrade Mendonça
- Laboratório de Vetores Virais, Centro de Investigação Translacional em Oncologia, Instituto do Cancer do Estado de Sao Paulo (ICESP), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
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4
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Wild-type p53 oligomerizes more efficiently than p53 hot-spot mutants and overcomes mutant p53 gain-of-function via a "dominant-positive" mechanism. Oncotarget 2018; 9:32063-32080. [PMID: 30174797 PMCID: PMC6112834 DOI: 10.18632/oncotarget.25944] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 07/21/2018] [Indexed: 12/24/2022] Open
Abstract
Human p53 protein acts as a transcription factor predominantly in a tetrameric form. Single residue changes, caused by hot-spot mutations of the TP53 gene in human cancer, transform wild-type (wt) p53 tumor suppressor proteins into potent oncoproteins - with gain-of-function, tumor-promoting activity. Oligomerization of p53 allows for a direct interplay between wt and mutant p53 proteins if both are present in the same cells - where a mutant p53's dominant-negative effect known to inactivate wt p53, co-exists with an opposite mechanism - a "dominant-positive" suppression of the mutant p53's gain-of-function activity by wt p53. In this study we determine the oligomerization efficiency of wt and mutant p53 in living cells using FRET-based assays and describe wt p53 to be more efficient than mutant p53 in entering p53 oligomers. The biased p53 oligomerization helps to interpret earlier reports of a low efficiency of the wt p53 inactivation via the dominant-negative effect, while it also implies that the "dominant-positive" effect may be more pronounced. Indeed, we show that at similar wt:mutant p53 concentrations in cells - the mutant p53 gain-of-function stimulation of gene transcription and cell migration is more efficiently inhibited than the wt p53's tumor-suppressive transactivation and suppression of cell migration. These results suggest that the frequent mutant p53 accumulation in human tumor cells does not only directly strengthen its gain-of-function activity, but also protects the oncogenic p53 mutants from the functional dominance of wt p53.
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Niculiţe CM, Nechifor MT, Urs AO, Olariu L, Ceafalan LC, Leabu M. Keratinocyte Motility Is Affected by UVA Radiation-A Comparison between Normal and Dysplastic Cells. Int J Mol Sci 2018; 19:E1700. [PMID: 29880745 PMCID: PMC6032280 DOI: 10.3390/ijms19061700] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 06/01/2018] [Accepted: 06/05/2018] [Indexed: 01/17/2023] Open
Abstract
UVA radiation induces multiple and complex changes in the skin, affecting epidermal cell behavior. This study reports the effects of UVA exposure on normal (HaCaT) and dysplastic (DOK) keratinocytes. The adherence, spreading and proliferation were investigated by time-lapse measurement of cell layer impedance on different matrix proteins. Prior to UVA exposure, the time required for adherence and spreading did not differ significantly for HaCaT and DOK cells, while spreading areas were larger for HaCaT cells. Under UVA exposure, HaCaT and DOK cells behavior differed in terms of movement and proliferation. The cells' ability to cover the denuded surface and individual cell trajectories were recorded by time-lapse videomicroscopy, during wound healing experiments. Dysplastic keratinocytes showed more sensitivity to UVA, exhibiting transient deficiencies in directionality of movement and a delay in re-coating the denuded area. The actin cytoskeleton displayed a cortical organization immediately after irradiation, in both cell lines, similar to mock-irradiated cells. Post-irradiation, DOK cells displayed a better organization of stress fibers, persistent filopodia, and new, stronger focal contacts. In conclusion, after UVA exposure HaCaT and DOK cells showed a different behavior in terms of adherence, spreading, motility, proliferation, and actin cytoskeleton dynamics, with the dyplastic keratinocytes being more sensitive.
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Affiliation(s)
- Cristina M Niculiţe
- Victor Babeș National Institute of Pathology, 99-101, Splaiul Independentei, 050096 Bucharest, Romania.
- Department of Morphological Sciences, University of Medicine and Pharmacy Carol Davila, 8, Blvd. Eroilor Sanitari, 050474 Bucharest, Romania.
| | - Marina T Nechifor
- Department of Anatomy, Animal Physiology and Biophysics, Faculty of Biology, University of Bucharest, 91-95, Splaiul Independentei, 050095 Bucharest, Romania.
| | - Andreea O Urs
- Victor Babeș National Institute of Pathology, 99-101, Splaiul Independentei, 050096 Bucharest, Romania.
| | - Laura Olariu
- SC Biotehnos SA, 3-5, Gorunului Street, 075100 Otopeni, Romania.
| | - Laura C Ceafalan
- Victor Babeș National Institute of Pathology, 99-101, Splaiul Independentei, 050096 Bucharest, Romania.
- Department of Morphological Sciences, University of Medicine and Pharmacy Carol Davila, 8, Blvd. Eroilor Sanitari, 050474 Bucharest, Romania.
| | - Mircea Leabu
- Victor Babeș National Institute of Pathology, 99-101, Splaiul Independentei, 050096 Bucharest, Romania.
- Department of Morphological Sciences, University of Medicine and Pharmacy Carol Davila, 8, Blvd. Eroilor Sanitari, 050474 Bucharest, Romania.
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Fry EA, Inoue K. Aberrant expression of ETS1 and ETS2 proteins in cancer. CANCER REPORTS AND REVIEWS 2018; 2:10.15761/CRR.1000151. [PMID: 29974077 PMCID: PMC6027756 DOI: 10.15761/crr.1000151] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The ETS transcription factors regulate expression of genes involved in normal cell development, proliferation, differentiation, angiogenesis, and apoptosis, consisting of 28 family members in humans. Dysregulation of these transcription factors facilitates cell proliferation in cancers, and several members participate in invasion and metastasis by activating gene transcription. ETS1 and ETS2 are the founding members of the ETS family and regulate transcription by binding to ETS sequences. They are both involved in oncogenesis and tumor suppression depending on the biological situations used. The essential roles of ETS proteins in human telomere maintenance have been suggested, which have been linked to creation of new Ets binding sites. Recently, preferential binding of ETS2 to gain-of-function mutant p53 and ETS1 to wild type p53 (WTp53) has been suggested, raising the tumor promoting role for the former and tumor suppressive role for the latter. The oncogenic and tumor suppressive functions of ETS1 and 2 proteins have been discussed.
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Affiliation(s)
- Elizabeth A. Fry
- The Dept. of Pathology, Wake Forest University School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157 USA
| | - Kazushi Inoue
- The Dept. of Pathology, Wake Forest University School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157 USA
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Patil V, Pal J, Somasundaram K. Elucidating the cancer-specific genetic alteration spectrum of glioblastoma derived cell lines from whole exome and RNA sequencing. Oncotarget 2016; 6:43452-71. [PMID: 26496030 PMCID: PMC4791243 DOI: 10.18632/oncotarget.6171] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Accepted: 10/05/2015] [Indexed: 01/22/2023] Open
Abstract
Cell lines derived from tumor tissues have been used as a valuable system to study gene regulation and cancer development. Comprehensive characterization of the genetic background of cell lines could provide clues on novel genes responsible for carcinogenesis and help in choosing cell lines for particular studies. Here, we have carried out whole exome and RNA sequencing of commonly used glioblastoma (GBM) cell lines (U87, T98G, LN229, U343, U373 and LN18) to unearth single nucleotide variations (SNVs), indels, differential gene expression, gene fusions and RNA editing events. We obtained an average of 41,071 SNVs out of which 1,594 (3.88%) were potentially cancer-specific. The cell lines showed frequent SNVs and indels in some of the genes that are known to be altered in GBM- EGFR, TP53, PTEN, SPTA1 and NF1. Chromatin modifying genes- ATRX, MLL3, MLL4, SETD2 and SRCAP also showed alterations. While no cell line carried IDH1 mutations, five cell lines showed hTERT promoter activating mutations with a concomitant increase in hTERT transcript levels. Five significant gene fusions were found of which NUP93-CYB5B was validated. An average of 18,949 RNA editing events was also obtained. Thus we have generated a comprehensive catalogue of genetic alterations for six GBM cell lines.
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Affiliation(s)
- Vikas Patil
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India
| | - Jagriti Pal
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India
| | - Kumaravel Somasundaram
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India
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8
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Lee JG, Ahn JH, Jin Kim T, Ho Lee J, Choi JH. Mutant p53 promotes ovarian cancer cell adhesion to mesothelial cells via integrin β4 and Akt signals. Sci Rep 2015. [PMID: 26223322 PMCID: PMC4649895 DOI: 10.1038/srep12642] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Missense mutations in the TP53 gene resulting in the accumulation of mutant proteins are extremely common in advanced ovarian cancer, which is characterised by peritoneal metastasis. Attachment of cancer cells to the peritoneal mesothelium is regarded as an initial, key step for the metastatic spread of ovarian cancer. In the present study, we investigated the possible role of a p53 mutant in the mesothelial adhesion of ovarian cancer cells. We found that OVCAR-3 cells with the R248 TP53 mutation (p53R248) were more adhesive to mesothelial Met5A cells than were A2780 cells expressing wild-type p53. In addition, ectopic expression of p53R248 in p53-null SKOV-3 cells significantly increased adhesion to Met5A cells. Knockdown of mutant p53 significantly compromised p53R248-induced cell adhesion to Met5A cells. Microarray analysis revealed that several adhesion-related genes, including integrin β4, were markedly up-regulated, and certain signalling pathways, including PI3K/Akt, were activated in p53R248 transfectants of SKOV-3 cells. Inhibition of integrin β4 and Akt signalling using blocking antibody and the inhibitor LY294002, respectively, significantly attenuated p53R248-mediated ovarian cancer-mesothelial adhesion. These data suggest that the p53R248 mutant endows ovarian cancer cells with increased adhesiveness and that integrin β4 and Akt signalling are associated with the mutation-enhanced ovarian cancer-mesothelial cell adhesion.
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Affiliation(s)
- Jong-Gyu Lee
- Department of Life &Nanopharamceutical Science, Kyung Hee University, Seoul 130-701, South Korea.,Department of Oriental Pharmacy, College of Pharmacy, Kyung Hee University, Seoul 130-701, South Korea
| | - Ji-Hye Ahn
- Department of Life &Nanopharamceutical Science, Kyung Hee University, Seoul 130-701, South Korea.,Department of Oriental Pharmacy, College of Pharmacy, Kyung Hee University, Seoul 130-701, South Korea
| | - Tae Jin Kim
- Department of Obstetrics and Gynecology, Cheil General Hospital and Women's Healthcare Center, Dankook University College of Medicine, Seoul 100-380, South Korea
| | - Jae Ho Lee
- Laboratory of Molecular Oncology, Cheil General Hospital and Women's Healthcare Center, Dankook University College of Medicine, Seoul 100-380, South Korea
| | - Jung-Hye Choi
- Department of Life &Nanopharamceutical Science, Kyung Hee University, Seoul 130-701, South Korea.,Department of Oriental Pharmacy, College of Pharmacy, Kyung Hee University, Seoul 130-701, South Korea
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Wu Z, Liu B, E C, Liu J, Zhang Q, Liu J, Chen N, Chen R, Zhu R. Resveratrol inhibits the proliferation of human melanoma cells by inducing G1/S cell cycle arrest and apoptosis. Mol Med Rep 2014; 11:400-4. [PMID: 25333673 DOI: 10.3892/mmr.2014.2716] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 07/22/2014] [Indexed: 11/06/2022] Open
Abstract
Resveratrol (Res), a natural plant extract, is an effective inducer of cell apoptosis and cell cycle arrest in multiple carcinoma cell types, which has been demonstrated by its ability to inhibit the proliferation of multiple human tumor cells in vitro. Although Res possesses chemopreventive properties against several types of cancer, the molecular mechanism underlying its anticancer activity remains to be fully elucidated. The present study demonstrated that Res induced cell cycle arrest and inhibited the proliferation of human melanoma A375 (IC50=23 µM after 48 h; P<0.05) and SK-MEL-31 (IC50=15 µM after 48 h; P<0.05) cells. Western blot analysis demonstrated that Res induced the apoptosis of human melanoma A375 and SK-MEL-31 cells by upregulating the expression of Bcl-2-associated X protein and B-cell lymphoma 2, possibly via the p53 pathway and activation of caspase-9 and caspase-3.
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Affiliation(s)
- Zhiyuan Wu
- Department of Plastic Surgery, Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong 524001, P.R. China
| | - Bin Liu
- Department of Plastic Surgery, Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong 524001, P.R. China
| | - Cailing E
- Department of Dermatology, Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong 524001, P.R. China
| | - Jie Liu
- Department of Plastic Surgery, Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong 524001, P.R. China
| | - Qingyu Zhang
- Department of Plastic Surgery, Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong 524001, P.R. China
| | - Juntao Liu
- The Second Department of Orthopedics, Ningde Hospital, Affiliated Hospital of Fujian Medical University, Ningde, Fujian 352100, P.R. China
| | - Nianping Chen
- Laboratory of Hepatobiliary Surgery, Guangdong Medical College, Zhanjiang Key Laboratory of Hepatobiliary Diseases, Zhanjiang, Guangdong 524001, P.R. China
| | - Rongyi Chen
- Department of Dermatology, Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong 524001, P.R. China
| | - Runzhi Zhu
- Laboratory of Hepatobiliary Surgery, Guangdong Medical College, Zhanjiang Key Laboratory of Hepatobiliary Diseases, Zhanjiang, Guangdong 524001, P.R. China
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Xu L, Zolotarskaya OY, Yeudall WA, Yang H. Click hybridization of immune cells and polyamidoamine dendrimers. Adv Healthc Mater 2014; 3:1430-8. [PMID: 24574321 DOI: 10.1002/adhm.201300515] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 01/25/2014] [Indexed: 11/06/2022]
Abstract
Immobilizing highly branched polyamidoamine (PAMAM) dendrimers to the cell surface represents an innovative method of enhancing cell surface loading capacity to deliver therapeutic and imaging agents. In this work, hybridized immune cells, that is, macrophage RAW264.7 (RAW), with PAMAM dendrimer G4.0 (DEN) on the basis of bioorthogonal chemistry are clicked. Efficient and selective cell surface immobilization of dendrimers is confirmed by confocal microscopy. Viability and motility of RAW-DEN hybrids remain the same as untreated RAW cells according to WST-1 assay and wound closure assay. Furthermore, Western blot analysis reveals that there are no significant alterations in the expression levels of signaling molecules AKT, p38, and NFκB (p65) and their corresponding activated (phosphorylated) forms in RAW cells treated with azido sugar and dendrimer, indicating that the hybridization process neither induced cell stress response nor altered normal signaling pathways. Taken together, this work shows the feasibility of applying bioorthogonal chemistry to create cell-nanoparticle hybrids and demonstrates the noninvasiveness of this cell surface engineering approach.
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Affiliation(s)
- Leyuan Xu
- Department of Biomedical Engineering; Virginia Commonwealth University; Richmond VA 23284 USA
| | - Olga Yu. Zolotarskaya
- Department of Biomedical Engineering; Virginia Commonwealth University; Richmond VA 23284 USA
| | - W. Andrew Yeudall
- Philips Institute of Oral and Craniofacial Molecular Biology; Virginia Commonwealth University; Richmond VA 23298 USA
- Massey Cancer Center; Virginia Commonwealth University; Richmond VA 23298 USA
| | - Hu Yang
- Department of Biomedical Engineering; Virginia Commonwealth University; Richmond VA 23284 USA
- Massey Cancer Center; Virginia Commonwealth University; Richmond VA 23298 USA
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Wu S, Liu B, Zhang Q, Liu J, Zhou W, Wang C, Li M, Bao S, Zhu R. Dihydromyricetin reduced Bcl-2 expression via p53 in human hepatoma HepG2 cells. PLoS One 2013; 8:e76886. [PMID: 24223706 PMCID: PMC3817187 DOI: 10.1371/journal.pone.0076886] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Accepted: 08/27/2013] [Indexed: 12/16/2022] Open
Abstract
Dihydromyricetin (DHM) is a major active ingredient of flavonoids compounds. It exhibited anticancer activity and induced apoptosis in human hepatocellular carcinoma HepG2 cells according to our previous data. In this study, we investigated whether p53 is involved in DHM-triggered viability inhibition and apoptosis induction in cancer cells. MTT [3-(4, 5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide] assay was employed to evaluate the viability of HepG2 cells after DHM treatment. Meanwhile, p53 small interfering RNA (siRNA) was adopted to silence p53 expression. Protein level of p53 and Bax/Bcl-2 were evaluated by western blot analysis. Cell counting assay showed that DHM inhibited HepG2 cell growth effectively in a time- and dose-dependent manner. P53 expression was significantly increased after DHM treatment, whereas Bcl-2 was reduced potently. Furthermore, after co-treatment with Pifithrin-α (PFT-α, p53 inhibitor), Bcl-2 expression was reversed. The expression of Bax was no significant change, which was also observed after p53 silence. These findings defined and supported a novel function that DHM could induce human hepatocellular carcinoma HepG2 cells apoptosis by up-regulating Bax/Bcl-2 expression via p53 signal pathway.
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Affiliation(s)
- Shixing Wu
- Laboratory of Regenerative Medicine, Department of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical College, Zhanjiang, China
| | - Bin Liu
- Laboratory of Regenerative Medicine, Department of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical College, Zhanjiang, China
| | - Qingyu Zhang
- Laboratory of Regenerative Medicine, Department of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical College, Zhanjiang, China
| | - Jie Liu
- Laboratory of Regenerative Medicine, Department of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical College, Zhanjiang, China
| | - Wei Zhou
- Laboratory of Regenerative Medicine, Department of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical College, Zhanjiang, China
| | - Chang Wang
- Emergency Department, Ningde Hospital, Affiliated Hospital of Fujian Medical University, Ningde, China
| | - Mingyi Li
- Laboratory of Regenerative Medicine, Department of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical College, Zhanjiang, China
- * E-mail: (ML); (SB); (RZ)
| | - Shiting Bao
- Laboratory of Regenerative Medicine, Department of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical College, Zhanjiang, China
- * E-mail: (ML); (SB); (RZ)
| | - Runzhi Zhu
- Laboratory of Regenerative Medicine, Department of Hepatobiliary Surgery, Affiliated Hospital of Guangdong Medical College, Zhanjiang, China
- * E-mail: (ML); (SB); (RZ)
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