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Mitrach F, Schmid M, Toussaint M, Dukic-stefanovic S, Deuther-conrad W, Franke H, Ewe A, Aigner A, Wölk C, Brust P, Hacker MC, Schulz-siegmund M. Amphiphilic Anionic Oligomer-Stabilized Calcium Phosphate Nanoparticles with Prospects in siRNA Delivery via Convection-Enhanced Delivery. Pharmaceutics 2022; 14:326. [PMID: 35214058 PMCID: PMC8877163 DOI: 10.3390/pharmaceutics14020326] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/19/2022] [Accepted: 01/25/2022] [Indexed: 01/27/2023] Open
Abstract
Convection-enhanced delivery (CED) has been introduced as a concept in cancer treatment to generate high local concentrations of anticancer therapeutics and overcome the limited diffusional distribution, e.g., in the brain. RNA interference provides interesting therapeutic options to fight cancer cells but requires nanoparticulate (NP) carriers with a size below 100 nm as well as a low zeta potential for CED application. In this study, we investigated calcium phosphate NPs (CaP-NPs) as siRNA carriers for CED application. Since CaP-NPs tend to aggregate, we introduced a new terpolymer (o14PEGMA(1:1:2.5) NH3) for stabilization of CaP-NPs intended for delivery of siRNA to brain cancer cells. This small terpolymer provides PEG chains for steric stabilization, and a fat alcohol to improve interfacial activity, as well as maleic anhydrides that allow for both labeling and high affinity to Ca(II) in the hydrolyzed state. In a systematic approach, we varied the Ca/P ratio as well as the terpolymer concentration and successfully stabilized NPs with the desired properties. Labeling of the terpolymer with the fluorescent dye Cy5 revealed the terpolymer’s high affinity to CaP. Importantly, we also determined a high efficiency of siRNA binding to the NPs that caused very effective survivin siRNA silencing in F98 rat brain cancer cells. Cytotoxicity investigations with a standard cell line resulted in minor and transient effects; no adverse effects were observed in organotypic brain slice cultures. However, more specific cytotoxicity investigations are required. This study provides a systematic and mechanistic analysis characterizing the effects of the first oligomer of a new class of stabilizers for siRNA-loaded CaP-NPs.
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Vallet C, Aschmann D, Beuck C, Killa M, Meiners A, Mertel M, Ehlers M, Bayer P, Schmuck C, Giese M, Knauer SK. Functional Disruption of the Cancer-Relevant Interaction between Survivin and Histone H3 with a Guanidiniocarbonyl Pyrrole Ligand. Angew Chem Int Ed Engl 2020; 59:5567-5571. [PMID: 31916356 PMCID: PMC7155087 DOI: 10.1002/anie.201915400] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Indexed: 12/21/2022]
Abstract
The protein Survivin is highly upregulated in most cancers and considered to be a key player in carcinogenesis. We explored a supramolecular approach to address Survivin as a drug target by inhibiting the protein-protein interaction of Survivin and its functionally relevant binding partner Histone H3. Ligand L1 is based on the guanidiniocarbonyl pyrrole cation and serves as a highly specific anion binder in order to target the interaction between Survivin and Histone H3. NMR titration confirmed binding of L1 to Survivin's Histone H3 binding site. The inhibition of the Survivin-Histone H3 interaction and consequently a reduction of cancer cell proliferation were demonstrated by microscopic and cellular assays.
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Affiliation(s)
- Cecilia Vallet
- Department of Molecular Biology IIUniversity of Duisburg-EssenUniversitätsstraße 545141EssenGermany
| | - Dennis Aschmann
- Institute for Organic ChemistryUniversity of Duisburg-EssenGermany
| | - Christine Beuck
- Department of Structural and Medicinal BiochemistryUniversity of Duisburg-EssenGermany
| | - Matthias Killa
- Institute for Organic ChemistryUniversity of Duisburg-EssenGermany
| | - Annika Meiners
- Department of Molecular Biology IIUniversity of Duisburg-EssenUniversitätsstraße 545141EssenGermany
| | - Marcel Mertel
- Institute for Organic ChemistryUniversity of Duisburg-EssenGermany
| | - Martin Ehlers
- Institute for Organic ChemistryUniversity of Duisburg-EssenGermany
| | - Peter Bayer
- Department of Structural and Medicinal BiochemistryUniversity of Duisburg-EssenGermany
| | - Carsten Schmuck
- Institute for Organic ChemistryUniversity of Duisburg-EssenGermany
| | - Michael Giese
- Institute for Organic ChemistryUniversity of Duisburg-EssenGermany
| | - Shirley K. Knauer
- Department of Molecular Biology IIUniversity of Duisburg-EssenUniversitätsstraße 545141EssenGermany
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Vallet C, Aschmann D, Beuck C, Killa M, Meiners A, Mertel M, Ehlers M, Bayer P, Schmuck C, Giese M, Knauer SK. Funktionelle Inhibition der krebsrelevanten Interaktion von Survivin und Histon H3 mit einem Guanidiniumcarbonylpyrrol‐Liganden. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915400] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Cecilia Vallet
- Lehrstuhl für Molekularbiologie II Universität Duisburg-Essen Universitätsstraße 5 45141 Essen Deutschland
| | - Dennis Aschmann
- Institut für organische Chemie Universität Duisburg-Essen Deutschland
| | - Christine Beuck
- Lehrstuhl für strukturelle und medizinische Biochemie Universität Duisburg-Essen Deutschland
| | - Matthias Killa
- Institut für organische Chemie Universität Duisburg-Essen Deutschland
| | - Annika Meiners
- Lehrstuhl für Molekularbiologie II Universität Duisburg-Essen Universitätsstraße 5 45141 Essen Deutschland
| | - Marcel Mertel
- Institut für organische Chemie Universität Duisburg-Essen Deutschland
| | - Martin Ehlers
- Institut für organische Chemie Universität Duisburg-Essen Deutschland
| | - Peter Bayer
- Lehrstuhl für strukturelle und medizinische Biochemie Universität Duisburg-Essen Deutschland
| | - Carsten Schmuck
- Institut für organische Chemie Universität Duisburg-Essen Deutschland
| | - Michael Giese
- Institut für organische Chemie Universität Duisburg-Essen Deutschland
| | - Shirley K. Knauer
- Lehrstuhl für Molekularbiologie II Universität Duisburg-Essen Universitätsstraße 5 45141 Essen Deutschland
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Park JB, Park C. Small Interfering RNA-Mediated Suppression of Fas Modulate Apoptosis and Proliferation in Rat Intervertebral Disc Cells. Asian Spine J 2017; 11:686-93. [PMID: 29093776 DOI: 10.4184/asj.2017.11.5.686] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 12/11/2016] [Accepted: 12/13/2016] [Indexed: 12/20/2022] Open
Abstract
Study Design In vitro cell culture model. Purpose To investigate the effect of small interfering RNA (siRNA) on Fas expression, apoptosis, and proliferation in serum-deprived rat disc cells. Overview of Literature Synthetic siRNA can trigger an RNA interference (RNAi) response in mammalian cells and precipitate the inhibition of specific gene expression. However, the potential utility of siRNA technology in downregulation of specific genes associated with disc cell apoptosis remains unclear. Methods Rat disc cells were isolated and cultured in the presence of either 10% fetal bovine serum (FBS) (normal control) or 0% FBS (serum deprivation to induce apoptosis) for 48 hours. Fas expression, apoptosis, and proliferation were determined. Additionally, siRNA oligonucleotides against Fas (Fas siRNA) were transfected into rat disc cells to suppress Fas expression. Changes in Fas expression were assessed by reverse transcription-polymerase chain reaction and semiquantitatively analyzed using densitometry. The effect of Fas siRNA on apoptosis and proliferation of rat disc cells were also determined. Negative siRNA and transfection agent alone (Mock) were used as controls. Results Serum deprivation increased apoptosis by 40.3% (p<0.001), decreased proliferation by 45.3% (p<0.001), and upregulated Fas expression. Additionally, Fas siRNA suppressed Fas expression in serum-deprived cultures, with 68.5% reduction at the mRNA level compared to the control cultures (p<0.001). Finally, Fas siRNA–mediated suppression of Fas expression significantly inhibited apoptosis by 9.3% and increased proliferation by 21% in serum-deprived cultures (p<0.05 for both). Conclusions The observed dual positive effect of Fas siRNA might be a powerful therapeutic approach for disc degeneration by suppression of harmful gene expression.
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Park JB, Chang DG, Oh SY, Park EY. Effect of RNA Interference-Mediated Suppression of p75 on the Viability of Rat Notochordal Cells. Asian Spine J 2016; 10:985-92. [PMID: 27994772 DOI: 10.4184/asj.2016.10.6.985] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 08/11/2016] [Accepted: 08/13/2016] [Indexed: 01/12/2023] Open
Abstract
Study Design In vitro cell culture model. Purpose To investigate the effects of RNA interference (RNAi) on p75 expression and viability of rat notochordal cells treated with serum deprivation. Overview of Literature RNAi enables the inhibition of specific genes by sequence-specific gene silencing using a double-stranded RNA. Methods Notochordal cells were isolated, cultured, and placed in 10% (control) or 0% (apoptosis-promoting) fetal bovine serum (FBS) for 48 hours. The expression of p75, apoptosis, and cell proliferation were determined. To suppress p75 expression, a small interfering RNA (siRNA) was synthesized against p75 (p75 siRNA) and transfected into cells. The suppression of p75 mRNA expression was investigated using the reverse transcription-polymerase chain reaction. The degree of p75 suppression was semiquantitatively analyzed using densitometry. The effect of p75 siRNA on apoptosis and proliferation of cells was determined. Solutions of an unrelated siRNA and transfection agent alone served as controls. Results Serum deprivation significantly increased apoptosis by 40.3%, decreased proliferation of notochordal cells by 45.3% (both, p<0.001), and upregulated p75 expression. The p75 siRNA suppressed p75 expression in cells cultured in 0% FBS. The rate of suppression by p75 siRNA of p75 mRNA was 72.9% (p<0.001). Suppression of p75 expression by p75 siRNA inhibited apoptosis by 7% and increased proliferation by 14% in cells cultured in 0% FBS (both, p<0.05). Conclusions siRNA-mediated suppression of p75 inhibited apoptosis and increased proliferation of notochordal cells under conditions of serum deprivation, suggesting that RNAi might serve as a novel therapeutic approach for disc degeneration caused by insufficient viability of disc cells through the suppression of the expression of harmful genes.
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Wang X, Xiong Y, Zhang C, Zhou J, Yang J, Wang K, Xia X. Experimental study on inhibition of the growth of human adenoid cystic cancer cells by RNA interference targeting against survivingene. Am J Transl Res 2016; 8:375-383. [PMID: 27158333 PMCID: PMC4846890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 11/07/2015] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To observe the influence of RNA interference targeting against survivin gene on the biological behaviors of human adenoid cystic cancer (ACC) cells and propose the action mechanism. METHOD Specific siRNA (small interfering RNA) was constructed and transfected into ACC-2 cells using liposomes. The expressions of survivin and Caspase-3 in the transfected ACC-2 cells were detected by Western Blot and RT-PCR. Cell apoptosis was detected by transmission electron microscopy, TUNEL method and flow cytometry; ultrastructural changes and cell cycles were observed. RESULTS Recombinant siRNA interference plasmid specifically targeting against survivin gene was constructed successfully. Survivin protein expression in the transfected ACC-2 cells was downregulated significantly, while Caspase-3 protein and mRNA expressions were upregulated and cell proliferation was inhibited considerably. CONCLUSION Recombinant siRNA interference plasmid inhibited survivin mRNA and protein expressions at high efficiency, thereby inhibiting the proliferation of ACC cells.
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Affiliation(s)
- Xin Wang
- Department of Stomatology, Southwest Hospital, Third Military Medical University Chongqing, China
| | - Yu Xiong
- Department of Stomatology, Southwest Hospital, Third Military Medical University Chongqing, China
| | - Congji Zhang
- Department of Stomatology, Southwest Hospital, Third Military Medical University Chongqing, China
| | - Jixiang Zhou
- Department of Stomatology, Southwest Hospital, Third Military Medical University Chongqing, China
| | - Jun Yang
- Department of Stomatology, Southwest Hospital, Third Military Medical University Chongqing, China
| | - Kun Wang
- Department of Stomatology, Southwest Hospital, Third Military Medical University Chongqing, China
| | - Xiyan Xia
- Department of Stomatology, Southwest Hospital, Third Military Medical University Chongqing, China
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Khan Z, Khan AA, Prasad GBKS, Khan N, Tiwari RP, Bisen PS. Growth inhibition and chemo-radiosensitization of head and neck squamous cell carcinoma (HNSCC) by survivin-siRNA lentivirus. Radiother Oncol 2015; 118:359-68. [PMID: 26747757 DOI: 10.1016/j.radonc.2015.12.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 12/14/2015] [Accepted: 12/15/2015] [Indexed: 10/22/2022]
Abstract
BACKGROUND Survivin expression is often associated with aggressive tumor behavior and therapy resistance. In this study, we investigated the effect of survivin knockdown by survivin-siRNA lentiviral vector (Svv-Lent) on the response of HNSCC to chemo-radiotherapy, tumor growth and metastasis. METHODS Four human HNSCC (OSC19, Cal27, Cal33 and FaDu) and one normal HOK cell lines were included in the study, and survivin knockdown was achieved with Svv-Lent treatment. Cell proliferation and apoptosis were measured by MTT and TUNEL assay, respectively. Transwell assays were performed to measure in vitro cell migration and matrigel invasion. Xenograft tumors were developed in nude mice by injecting Cal27 cells subcutaneously and following tail-vein injection of lung and liver metastasis. RESULTS Knockdown of survivin significantly suppressed HNSCC cell proliferation and induced apoptosis in vitro. Survivin inhibition could also significantly reduce in vitro cell migration and matrigel invasion that might be due to inactivation of matrix metalloproteinases. In vivo studies showed significant repression of Cal27 xenograft tumor growth and tissue metastasis leading to improvement in mice survival in the Svv-Lent treated group compared to controls. Our data indicated that survivin expression in HNSCC cells contributed to chemo-radioresistance, and its down-regulation increased anti-cancer effects of paclitaxel, cisplatin and radiation. CONCLUSIONS Our findings suggest that sustained survivin expression facilitates HNSCC tumor growth and confers resistance to chemo-radiotherapy. Svv-Lent therapy may be able to enhance the cytotoxic effect of commonly used anticancer drugs such as cisplatin and paclitaxel, and radiotherapy that could provide a promising strategy for the effective control of resistant head and neck cancer.
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Affiliation(s)
- Zakir Khan
- School of Studies in Biotechnology, Jiwaji University, Gwalior, India; Departments of Biomedical Sciences and Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, USA.
| | - Abdul Arif Khan
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | | | - Noor Khan
- Division of Plant-Microbe Interactions, National Botanical Research Institute, Lucknow, India
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Pandey A, Vishnoi K, Mahata S, Tripathi SC, Misra SP, Misra V, Mehrotra R, Dwivedi M, Bharti AC. Berberine and Curcumin Target Survivin and STAT3 in Gastric Cancer Cells and Synergize Actions of Standard Chemotherapeutic 5-Fluorouracil. Nutr Cancer 2015; 67:1293-304. [PMID: 26492225 DOI: 10.1080/01635581.2015.1085581] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Aberrantly expressed survivin and STAT3 signaling have emerged as major determinants of chemoresistance in gastric cancer. We evaluated effects of potent herbal derivatives curcumin, berberine, and quercetin on STAT3 signaling, survivin expression, and response to 5-fluorouracil (5-FU) treatment in gastric cancer cells (AGS). Cytotoxic and inhibitory effects of berberine, curcumin, and quercetin alone or in combination with 5-FU were examined by MTT assay, and their effect on survivin, STAT3, and the phosphorylated active STAT3 (pSTAT3) expression was examined by western blotting. Effect of these herbal derivatives on STAT3 DNA binding activity was measured by electrophoretic mobility shift assay. Curcumin, berberine, and quercetin effectively downregulated pSTAT3 levels, survivin expression, and gastric cancer cells viability in a dose-dependent manner (with corresponding IC50 values of 40.3μM, 29.2μM and 37.5μM, respectively). Berberine was more effective in inhibiting survivin expression as compared to other herbal agents. 5-FU in combination with berberine or curcumin showed a synergistic inhibition of survivin and STAT3 level resulting in enhanced cell death in gastric cancer cells. Overall, our data suggest use of berberine and curcumin as adjunct therapeutics to overcome chemoresistance during treatment of gastric malignancies.
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Affiliation(s)
- Arvind Pandey
- a Division of Molecular Oncology , Institute of Cytology and Preventive Oncology, Noida, India and Center for Biotechnology, University of Allahabad , Allahabad , India
| | - Kanchan Vishnoi
- b Division of Molecular Oncology , Institute of Cytology and Preventive Oncology , Noida , India
| | - Sutapa Mahata
- b Division of Molecular Oncology , Institute of Cytology and Preventive Oncology , Noida , India
| | | | - Sri Prakash Misra
- c Department of Gastroenterology , MLN Medical College , Allahabad , India
| | - Vatsala Misra
- d Department of Pathology , MLN Medical College , Allahabad , India
| | - Ravi Mehrotra
- b Division of Molecular Oncology , Institute of Cytology and Preventive Oncology , Noida , India
| | - Manisha Dwivedi
- c Department of Gastroenterology , MLN Medical College , Allahabad , India
| | - Alok C Bharti
- b Division of Molecular Oncology , Institute of Cytology and Preventive Oncology , Noida , India
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Karami H, Baradaran B, Esfahani A, Estiar MA, Naghavi-Behzad M, Sakhinia M, Sakhinia E. siRNA-mediated silencing of survivin inhibits proliferation and enhances etoposide chemosensitivity in acute myeloid leukemia cells. Asian Pac J Cancer Prev 2014; 14:7719-24. [PMID: 24460358 DOI: 10.7314/apjcp.2013.14.12.7719] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Overexpression of survivin, a known inhibitor of apoptosis, is associated with tumor progression and drug resistance in numerous malignancies, including leukemias. The aim of this study was to investigate the effect of a specific survivin small interference RNA (siRNA) on proliferation and the sensitivity of HL-60 acute myeloid leukemia (AML) cells to the chemotherapeutic drug etoposide. MATERIALS AND METHODS The cells were transfected with siRNAs using LipofectamineTM2000 transfection reagent. Relative survivin mRNA and protein levels were measured by quantitative real-time PCR and Western blotting, respectively. Trypan blue exclusion assays were performed to monitor tumor cell proliferation after siRNA transfection. The cytotoxic effects of etoposide and survivin siRNA, alone and in combination, on leukemic cells were determined using MTT assay. Apoptosis was assessed by ELISA cell death assay. RESULTS Survivin siRNA markedly reduced both mRNA and protein expression levels in a time-dependent manner, leading to distinct inhibition of cell proliferation and increased spontaneous apoptosis. Surprisingly, survivin siRNA synergistically increased the cell toxic effects of etoposide. Moreover, survivin down-regulation significantly enhanced its induction of apoptosis. CONCLUSIONS Our study suggests that down-regulation of survivin by siRNA can trigger apoptosis and overcome drug resistance of leukemia cells. Therefore, survivin siRNA may be an effective adjuvant in AML chemotherapy.
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Affiliation(s)
- Hadi Karami
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran E-mail : ,
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Wang J, Wu XP, Song XM, Han CR, Chen Z, Chen GY. F-01A, an antibiotic, inhibits lung cancer cells proliferation. Chin J Nat Med 2014; 12:284-9. [PMID: 24863353 DOI: 10.1016/s1875-5364(14)60055-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Indexed: 11/24/2022]
Abstract
AIM In an effort to identify novel, small molecules which can affect the proliferation of lung cancer cells, F-01A, a polyether antibiotic isolated from the fermentation broth of Streptomyces was tested. METHOD F-01A was tested for its antitumor properties on the lung cancer cell line SPC-A-1, at six doses (0.1, 0.5, 1, 2.5, and 5 μmol·L(-1)), using various cellular assays. Cell viability was measured by the MTT assay, Hochest 33258 was used to study nuclear morphology; DNA ladder and the loss of mitochondrial membrane potential were also evaluated. RESULTS F-01A induces apoptosis against SPC-A-1 cells in a dose-dependent manner. The IC50 is 0.65 μmol·L(-1), and the inhibition at 5 μmol·L(-1) is 87.89%. Further, JC-1 staining indicates F-01A could induce the loss of mitochondrial membrane potential, and the DNA fragment is evident. CONCLUSION Mechanistic analysis showed that F-01A induced apoptosis of cancer cells probably in the mitochondrial pathway. The antitumor actions of F-01A involve activation of the apoptotic pathway against SPC-A-1 cells, and it may be valuable for further drug development.
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Affiliation(s)
- Jing Wang
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, China; College of Life Sciences, Hainan Normal University, Haikou 571158, China
| | - Xiao-Peng Wu
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Xin-Ming Song
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, China
| | - Chang-Ri Han
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, China
| | - Zhong Chen
- College of Life Sciences, Hainan Normal University, Haikou 571158, China.
| | - Guang-Ying Chen
- Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, China.
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Lepri SR, Zanelatto LC, da Silva PBG, Sartori D, Ribeiro LR, Mantovani MS. Effects of genistein and daidzein on cell proliferation kinetics in HT29 colon cancer cells: the expression of CTNNBIP1 (β-catenin), APC (adenomatous polyposis coli) and BIRC5 (survivin). Hum Cell 2014; 27:78-84. [PMID: 24390805 DOI: 10.1007/s13577-012-0051-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Accepted: 10/15/2012] [Indexed: 12/15/2022]
Abstract
Soybean isoflavonoids have received significant attention due to their potential anticarcinogenic and antiproliferative effects and possible role in many signal transduction pathways. However, their mechanisms of action and their molecular targets remain to be further elucidated. In this paper, we demonstrated that two soybean isoflavones (genistein and daidzein) reduced the proliferation of the human colon adenocarcinoma grade II cell line (HT-29) at concentrations of 25 and 50-100 μM, respectively. We then investigated the effects of genistein and daidzein by RT-PCR on molecules that involved in tumor development and progression by their regulation of cell proliferation. At a concentration of 50 μM genistein, there was suppressed expression of β-catenin (CTNNBIP1). Neither genistein nor daidzein affected APC (adenomatous polyposis coli) or survivin (BIRC5) expression when cells were treated with concentrations of 10 or 50 μM. These data suggest that the down-regulation of β-catenin by genistein may constitute an important determinant of the suppression of HT-29 cell growth and may be exploited for the prevention and treatment of colon cancer.
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Affiliation(s)
- Sandra Regina Lepri
- General Biology Department, State University of Londrina (UEL), Rodovia Celso Garcia Cid, Pr 445 km 380, Campus Universitário, Cx. Postal 6001, CEP 86051-980, Londrina, PR, Brazil,
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Ye B, Jiang LL, Xu HT, Zhou DW, Li ZS. Expression of PI3K/AKT pathway in gastric cancer and its blockade suppresses tumor growth and metastasis. Int J Immunopathol Pharmacol 2012; 25:627-36. [PMID: 23058013 DOI: 10.1177/039463201202500309] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Phosphoinositide 3-kinase (PI3K)/protein kinase B (AKT) signaling pathway plays a crucial role in the formation and progression of many malignancies, and has been shown to be an important therapeutic target for cancer. In the present study, human gastric adenocarcinoma tissues of different grades (N=45) were collected. The protein expression of PI3Kp85α and phosphorylated AKT (p-AKT) was evaluated immunohistochemically in the biopsy samples. PI3K/AKT pathway was blocked by constructed recombinant small hairpin RNA adenovirus vector rAd5-PI3Kp85α (rAd5-P) used to transfect into human gastric cancer SGC-7901cell line. The transfection efficiency of rAd5-P in SGC-7901 cells was observed under fluorescent microscope. The expression of PI3Kp85α, p-AKT, Ki-67 and matrix metallopeptidase-2 (MMP-2) was detected by real-time PCR and Western blot assays. Cell proliferative activities and metastatic capabilities were determined by MTT and Transwell assays. As a consequence, the protein expression of PI3Kp85α and p-AKT was respectively observed in 80.0% and 82.2% gastric adenocarcinoma tissues, elevating with the ascending order of tumor malignancy. Targeted blockade of PI3K pathway decreased the expression of PI3Kp85α, p-AKT, Ki-67 and MMP-2, and inhibited the proliferative activities and metastatic capabilities of gastric cancer cells. In conclusion, PI3Kp85α and p-AKT were strongly expressed in gastric adenocarcinoma tissues, and targeted blockade of PI3K pathway may inhibit gastric cancer growth and metastasis through down-regulation of Ki-67 and MMP-2 expression. PI3K/AKT pathway may represent an important therapeutic target for gastric cancer.
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Affiliation(s)
- B Ye
- Department of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai, China
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Muktapuram PR, Gara RK, Sharma K, Rohit C, Srinivas K, Mishra DP, Bathula SR. Anticancer siRNA delivery by new anticancer molecule: A novel combination strategy for cancer cell killing. Eur J Med Chem 2012; 56:400-8. [DOI: 10.1016/j.ejmech.2012.07.035] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 07/17/2012] [Accepted: 07/18/2012] [Indexed: 12/17/2022]
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Shen X, Zheng JY, Shi H, Zhang Z, Wang WZ. Survivin knockdown enhances gastric cancer cell sensitivity to radiation and chemotherapy in vitro and in nude mice. Am J Med Sci 2012; 344:52-8. [PMID: 22261621 DOI: 10.1097/maj.0b013e318239c4ee] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
INTRODUCTION The aim is to assess the effect of survivin knockdown on the radio- and chemosensitivity of gastric cancer cells in vitro and in nude mice. METHODS Survivin messenger RNA and protein were detected by semiquantitative reverse transcription-polymerase chain reaction and Western blot. Survivin and control small hairpin RNA (shRNA) expression constructed vectors were stably transfected into gastric cancer SGC7901 cells. The cells were in turn subjected to irradiation, cisplatin or fluorouracil (5-FU) treatment for colony formation, methyl-thiazolyl-tetrazolium cell viability and flow cytometry assays in vitro. An in vivo nude mouse xenograft assay was performed to assess the effects of Survivin knockdown on regulation of the sensitivity of SGC7901 cells to irradiation, cisplatin or 5-FU treatment. RESULTS Survivin shRNA markedly inhibited levels of survivin messenger RNA and protein in SGC7901 cells and significantly increased sensitivity of the tumor cells to radiation treatment, ie, the mean lethal and quasi-threshold doses in survivin shRNA-transfected cells were significantly lower than that of the negative control shRNA-transfected and parental cells. The same is true for cisplatin- and 5-FU-treated tumor cells, ie, colony formation and cell viability of the survivin-knocked down SGC7901 cells were reduced, while apoptosis was induced compared with the control cells. Furthermore, the xenograft assay showed survivin knockdown in SGC7901 cells suppressed tumor formation and growth compared with the controls. CONCLUSIONS Knockdown of survivin expression enhanced sensitivity of gastric cancer cells to radiation, cisplatin and 5-FU treatment in vitro and in nude mice. These results demonstrate that clinical trails are warranted of survivin shRNA as an adjuvant therapy for gastric cancer patients.
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Affiliation(s)
- Xin Shen
- Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
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Glienke W, Maute L, Wicht J, Bergmann L. The dual PI3K/mTOR inhibitor NVP-BGT226 induces cell cycle arrest and regulates Survivin gene expression in human pancreatic cancer cell lines. Tumour Biol 2012; 33:757-65. [DOI: 10.1007/s13277-011-0290-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Accepted: 12/01/2011] [Indexed: 10/14/2022] Open
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Chang RS, Suh MS, Kim S, Shim G, Lee S, Han SS, Lee KE, Jeon H, Choi HG, Choi Y, Kim CW, Oh YK. Cationic drug-derived nanoparticles for multifunctional delivery of anticancer siRNA. Biomaterials 2011; 32:9785-95. [PMID: 21937102 DOI: 10.1016/j.biomaterials.2011.09.017] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Accepted: 09/07/2011] [Indexed: 01/27/2023]
Abstract
Combined treatment of anticancer drugs and small interfering RNAs (siRNAs) have emerged as a new modality of anticancer therapy. Here, we describe a co-delivery system of anticancer drugs and siRNA in which anticancer drug-derived lipids form cationic nanoparticles for siRNA complexation. The anticancer drug mitoxantrone (MTO) was conjugated to palmitoleic acid, generating two types of palmitoleyl MTO (Pal-MTO) lipids: monopalmitoleyl MTO (mono-Pal-MTO) and dipalmitoleyl MTO (di-Pal-MTO). Among various lipid compositions of MTO, nanoparticles containing mono-Pal-MTO and di-Pal-MTO at a molar ratio of 1:1 (md11-Pal-MTO nanoparticles) showed the most efficient cellular delivery of siRNA, higher than that of Lipofectamine 2000. Delivery of red fluorescence protein-specific siRNA into B16F10-RFP cells using md11-Pal-MTO nanoparticles reduced the expression of RFP at both mRNA and protein levels, demonstrating silencing of the siRNA target gene. Moreover, delivery of Mcl-1-specific anticancer siRNA (siMcl-1) using md11-Pal-MTO enhanced antitumor activity in vitro, reducing tumor cell viability by 81% compared to a reduction of 68% following Lipofectamine 2000-mediated transfection of siMcl-1. Intratumoral administration of siMcl-1 using md11-Pal-MTO nanoparticles significantly inhibited tumor growth, reducing tumor size by 83% compared to untreated controls. Our results suggest the potential of md11-Pal-MTO multifunctional nanoparticles for co-delivery of anticancer siRNAs for effective combination therapy.
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Abstract
A variety of organic and inorganic nanomaterials with dimensions below several hundred nanometers are recently emerging as promising tools for cancer therapeutic and diagnostic applications due to their unique characteristics of passive tumor targeting. A wide range of nanomedicine platforms such as polymeric micelles, liposomes, dendrimers, and polymeric nanoparticles have been extensively explored for targeted delivery of anti-cancer agents, because they can accumulate in the solid tumor site via leaky tumor vascular structures, thereby selectively delivering therapeutic payloads into the desired tumor tissue. In recent years, nanoscale delivery vehicles for small interfering RNA (siRNA) have been also developed as effective therapeutic approaches to treat cancer. Furthermore, rationally designed multi-functional surface modification of these nanomaterials with cancer targeting moieties, protective polymers, and imaging agents can lead to fabrication versatile theragnostic nanosystems that allow simultaneous cancer therapy and diagnosis. This review highlights the current state and future prospects of diverse biomedical nanomaterials for cancer therapy and imaging.
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Affiliation(s)
| | | | - Tae Gwan Park
- Department of Biological Sciences and Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea
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Han B, Izumi H, Yasuniwa Y, Akiyama M, Yamaguchi T, Fujimoto N, Matsumoto T, Wu B, Tanimoto A, Sasaguri Y, Kohno K. Human mitochondrial transcription factor A functions in both nuclei and mitochondria and regulates cancer cell growth. Biochem Biophys Res Commun 2011; 408:45-51. [PMID: 21453679 DOI: 10.1016/j.bbrc.2011.03.114] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Accepted: 03/25/2011] [Indexed: 10/18/2022]
Abstract
Mitochondrial transcription factor A (mtTFA) is one of the high mobility group protein family and is required for both transcription from and maintenance of mitochondrial genomes. However, the roles of mtTFA have not been extensively studied in cancer cells. Here, we firstly reported the nuclear localization of mtTFA. The proportion of nuclear-localized mtTFA varied among different cancer cells. Some mtTFA binds tightly to the nuclear chromatin. DNA microarray and chromatin immunoprecipitation assays showed that mtTFA can regulate the expression of nuclear genes. Overexpression of mtTFA enhanced the growth of cancer cell lines, whereas downregulation of mtTFA inhibited their growth by regulating mtTFA target genes, such as baculoviral IAP repeat-containing 5 (BIRC5; also known as survivin). Knockdown of mtTFA expression induced p21-dependent G1 cell cycle arrest. These results imply that mtTFA functions in both nuclei and mitochondria to promote cell growth.
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Affiliation(s)
- Bin Han
- Department of Molecular Biology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan. ; Department of Urology, School of Medicine, University of Occupational and
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Shao Y, Liu Y, Shao C, Hu J, Li X, Li F, Zhang L, Zhao D, Sun L, Zhao X, Kopecko DJ, Kalvakolanu DV, Li Y, Xu DQ. Enhanced tumor suppression in vitro and in vivo by co-expression of survivin-specific siRNA and wild-type p53 protein. Cancer Gene Ther 2010; 17:844-54. [PMID: 20706288 DOI: 10.1038/cgt.2010.41] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The development of malignant prostate cancer involves multiple genetic alterations. For example, alterations in both survivin and p53 are reported to have crucial roles in prostate cancer progression. However, little is known regarding the interrelationships between p53 and survivin in prostate cancer. Our data demonstrate that the expression of survivin is inversely correlated with that of wtp53 protein (r(s)=0.548) in prostate cancer and in normal prostate tissues. We have developed a therapeutic strategy, in which two antitumor factors, small interfering RNA-survivin and p53 protein, are co-expressed from the same plasmid, and have examined their effects on the growth of PC3, an androgen-independent prostate cancer cell line. When p53 was expressed along with a survivin-specific short hairpin RNA (shRNA), tumor cell proliferation was significantly suppressed and apoptosis occurred. In addition, this combination also abrogated the expression of downstream target molecules such as cyclin-dependent kinase 4 and c-Myc, while enhancing the expression of GRIM19. These changes in gene expression occurred distinctly in the presence of survivin-shRNA/wtp53 compared with control or single treatment groups. Intratumoral injection of the co-expressed construct inhibited the growth and survival of tumor xenografts in a nude mouse model. These studies revealed evidence of an interaction between p53 and survivin proteins plus a complex signaling network operating downstream of the wtp53-survivin pathway that actively controls tumor cell proliferation, survival and apoptosis.
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Affiliation(s)
- Y Shao
- Department of Pathophysiology, Norman Bethune College of Medicine and Prostate Diseases Prevention and Treatment Research Center, Jilin University, Changchun, China
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Ryan BM, O'Donovan N, Duffy MJ. Survivin: a new target for anti-cancer therapy. Cancer Treat Rev 2009; 35:553-62. [PMID: 19559538 DOI: 10.1016/j.ctrv.2009.05.003] [Citation(s) in RCA: 257] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2009] [Revised: 05/13/2009] [Accepted: 05/15/2009] [Indexed: 12/22/2022]
Abstract
Survivin is one of the most cancer-specific proteins identified to date, being upregulated in almost all human tumors. Biologically, survivin has been shown to inhibit apoptosis, enhance proliferation and promote angiogenesis. Because of its upregulation in malignancy and its key role in apoptosis, proliferation and angiogenesis, survivin is currently attracting considerable attention as a new target for anti-cancer therapies. In several animal model systems, downregulation of survivin or inactivation of its function has been shown to inhibit tumor growth. Strategies under investigation to target survivin include antisense oligonucleotides, siRNA, ribozymes, immunotherapy and small molecular weight molecules. The translation of these findings to the clinic is currently ongoing with a number of phase I/II clinical trials targeting survivin in progress. These include use of the antisense oligonucleotide LY2181308, the low molecular weight molecule inhibitor YM155 and survivin-directed autologous cytotoxic T lymphocytes. The optimum use of survivin antagonists in the treatment of cancer is likely to be in combination with conventional cancer therapies.
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Affiliation(s)
- Bríd M Ryan
- Cancer Prevention Fellowship Program, Office of Preventive Oncology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892-4258, USA.
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Wang J, Jin Y, Xu Z, Zheng Z, Wan S. Involvement of caspase-3 activity and survivin downregulation in cinobufocini-induced apoptosis in A 549 cells. Exp Biol Med (Maywood) 2009; 234:566-72. [PMID: 19244543 DOI: 10.3181/0811-rm-326] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Cinobufocini injection is a preparation containing water-soluble components of the toad skin. The aim of the present study was to investigate the apoptosis of human lung adenocarcinoma cell line A 549 induced by cinobufocini. A 549 or HLF-1(human lung fibroblast) cells were treated with cinobufocini at different concentrations for 24 and 48 h, respectively. The proliferation of cells was detected with the 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyl tetrazolium bromide (MTT) assay. Morphology of cells was carried out with scanning electronic microscopy (SEM) and Hoechst 33258 staining. The apoptosis rate was examined by flow cytometry. The expression of survivin was examined with RT-PCR and Western blot assay. The caspase-3 and caspase-7 activities were detected with caspase colorimetric protease assay. We found that cinobufocini significantly inhibited tumor growth of A 549 cells in a dose- and time-dependent manner without damaging non-cancerous cells (HLF-1) and induced granular apoptotic bodies of A 549 cells. Next, cinobufocini increased the percentage of cells in G1 phase and decreased the percentage of cells in S phase in A 549 cells. Furthermore, cinobufocini downregulated the expression of survivin mRNA and protein. Finally, cinobufocini upregulated caspase-3 activity. We concluded that cinobufocini induces apoptosis of A 549 cells, which is associated with the decreasing expression of survivin mRNA and protein, increasing caspase-3 activity of A 549 cells.
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Affiliation(s)
- Juyong Wang
- Research Institute of Cancer, Shanghai Academy of Traditional Chinese Medicine, 725 Southern of Wan Ping Road, 68# Box, 200032 Shanghai, China.
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Alshamsan A, Haddadi A, Incani V, Samuel J, Lavasanifar A, Uludağ H. Formulation and Delivery of siRNA by Oleic Acid and Stearic Acid Modified Polyethylenimine. Mol Pharm 2008; 6:121-33. [DOI: 10.1021/mp8000815] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Aws Alshamsan
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton T6G 2N8, Canada, Department of Biomedical Engineering, Faculty of Medicine and Dentistry, University of Alberta, Edmonton T6G 2V2, Canada, and Department of Chemical and Material Engineering, Faculty of Engineering, University of Alberta, Edmonton T6G 2G6, Canada
| | - Azita Haddadi
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton T6G 2N8, Canada, Department of Biomedical Engineering, Faculty of Medicine and Dentistry, University of Alberta, Edmonton T6G 2V2, Canada, and Department of Chemical and Material Engineering, Faculty of Engineering, University of Alberta, Edmonton T6G 2G6, Canada
| | - Vanessa Incani
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton T6G 2N8, Canada, Department of Biomedical Engineering, Faculty of Medicine and Dentistry, University of Alberta, Edmonton T6G 2V2, Canada, and Department of Chemical and Material Engineering, Faculty of Engineering, University of Alberta, Edmonton T6G 2G6, Canada
| | - John Samuel
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton T6G 2N8, Canada, Department of Biomedical Engineering, Faculty of Medicine and Dentistry, University of Alberta, Edmonton T6G 2V2, Canada, and Department of Chemical and Material Engineering, Faculty of Engineering, University of Alberta, Edmonton T6G 2G6, Canada
| | - Afsaneh Lavasanifar
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton T6G 2N8, Canada, Department of Biomedical Engineering, Faculty of Medicine and Dentistry, University of Alberta, Edmonton T6G 2V2, Canada, and Department of Chemical and Material Engineering, Faculty of Engineering, University of Alberta, Edmonton T6G 2G6, Canada
| | - Hasan Uludağ
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton T6G 2N8, Canada, Department of Biomedical Engineering, Faculty of Medicine and Dentistry, University of Alberta, Edmonton T6G 2V2, Canada, and Department of Chemical and Material Engineering, Faculty of Engineering, University of Alberta, Edmonton T6G 2G6, Canada
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Abstract
AIM: To investigate the expression of Survivin and Livin of apoptosis inhibitors in gastric cancer cells.
METHODS: Immunohistochemical staining (S-P method) for Survivin and Livin was performed in 70 gastric cancer tissue samples and 48 adjacent tissue samples and BGC-823 cell, and its relationship with clinical pathological features and prognosis was analyzed.
RESULTS: Survivin and Livin were detected both in cytoplasm and in nuclei of gastric cancer cells. The expression of Survivin and Livin was higher in gastric cancer tissue samples than in adjacent tissue samples (32.86% vs 2.08%, 44.29% vs 4.17%, P < 0.01). Their expression in cytoplasm was significantly related with the differentiation degree (P = 0.007, P = 0.018) and histological type (P = 0.005, P = 0.049) of gastric cancer. The expression of Survivin in cytoplasm was significantly related with distant metastasis of gastric cancer. The expression of Survivin in nuclei was correlated with the growth pattern and distant metastasis of gastric cancer. The 5 years survival rate of gastric cancer patients having a high nuclear Survivin expression was lower than that of those having a low nuclear Survivin expression (40% vs 66%, P = 0.04).
CONCLUSION: Survivin and Livin are over-expressed in gastric cancer cells. A high Survivin expression in nuclei can serve as an important parameter of prognosis of gastric carcinoma patients.
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Zhang ZH, Han SX, Qiu CH, Qiang O, Chen HP, Zhang CM, Li Y. Effects and mechanisms of survivin-siRNA interference on colon adenocarcinoma cells SW620. Shijie Huaren Xiaohua Zazhi 2007; 15:3803-3808. [DOI: 10.11569/wcjd.v15.i36.3803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the effects and mecha-nisms of survivin-siRNA inteference on adenocarcinoma cells SW620.
METHODS: SW620 cells were transfected with survivin-siRNA using Lipofectamine 2000. The mRNA expression levels of survivin and PTEN were detected by RT-PCR and protein expression levels were detected by Western blotting. MTT and flow cytometry were used to analyze proliferation and apoptosis.
RESULTS: Compared with control cells, the mRNA and protein levels of survivin were reduced in siRNA-transfected cells, while PTEN was increased. At 12, 24, 48 hours, the expression of survivin mRNA was downregulated 75%, 93.75% and 97.8%, respectivly, compared with that in the controls, and the expression of PTEN mRNA was upregulated 41%, 100%, 128%. The growth of transfected cells was inhibited, while apopotosis was increased.
CONCLUSION: Survivin-siRNA has preferential effects on adenocarcinoma cells.
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