28 results on '"Iaboni, M."'
Search Results
2. Effect of miR-21 and miR-30b/c on TRAIL-induced apoptosis in glioma cells
- Author
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Quintavalle, C, Donnarumma, E, Iaboni, M, Roscigno, G, Garofalo, M, Romano, G, Fiore, D, De Marinis, P, Croce, C M, and Condorelli, G
- Published
- 2013
- Full Text
- View/download PDF
3. miR-221/222 overexpession in human glioblastoma increases invasiveness by targeting the protein phosphate PTPμ
- Author
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Quintavalle, C, Garofalo, M, Zanca, C, Romano, G, Iaboni, M, del Basso De Caro, M, Martinez-Montero, J C, Incoronato, M, Nuovo, G, Croce, C M, and Condorelli, G
- Published
- 2012
- Full Text
- View/download PDF
4. Correction: c-FLIPL enhances anti-apoptotic Akt functions by modulation of Gsk3β activity
- Author
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Quintavalle, C, primary, Incoronato, M, additional, Puca, L, additional, Acunzo, M, additional, Zanca, C, additional, Romano, G, additional, Garofalo, M, additional, Iaboni, M, additional, Croce, C M, additional, and Condorelli, G, additional
- Published
- 2017
- Full Text
- View/download PDF
5. Inhibition of Receptor Signaling and of Glioblastoma-derived Tumor Growth by a Novel PDGFR? Aptamer
- Author
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Camorani S, Esposito CL, Rienzo A, Catuogno S, Iaboni M, Condorelli G, de Franciscis V, and Cerchia L.
- Abstract
Platelet-derived growth factor receptor ? (PDGFR?) is a cell-surface tyrosine kinase receptor implicated in several cellular processes including proliferation, migration, and angiogenesis. It represents a compelling therapeutic target in many human tumors, including glioma. A number of tyrosine kinase inhibitors under development as antitumor agents have been found to inhibit PDGFR?. However, they are not selective as they present multiple tyrosine kinase targets. Here, we report a novel PDGFR?-specific antagonist represented by a nuclease-resistant RNA-aptamer, named Gint4.T. This aptamer is able to specifically bind to the human PDGFR? ectodomain (Kd: 9.6 nmol/l) causing a strong inhibition of ligand-dependent receptor activation and of downstream signaling in cell lines and primary cultures of human glioblastoma cells. Moreover, Gint4.T aptamer drastically inhibits cell migration and proliferation, induces differentiation, and blocks tumor growth in vivo. In addition, Gint4.T aptamer prevents PDGFR? heterodimerization with and resultant transactivation of epidermal growth factor receptor. As a result, the combination of Gint4.T and an epidermal growth factor receptor-targeted aptamer is better at slowing tumor growth than either single aptamer alone. These findings reveal Gint4.T as a PDGFR?-drug candidate with translational potential.Molecular Therapy (2014); doi:10.1038/mt.2013.300.
- Published
- 2014
6. Electrochemical detection of miRNA-222 by use of a magnetic bead-based bioassay
- Author
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Bettazzi F, Hamid-Asl E, Esposito CL, Quintavalle C, Formisano N, Laschi S, Catuogno S, Iaboni M, Marrazza G, Mascini M, Cerchia L, De Franciscis V, Condorelli G, and Palchetti I.
- Abstract
MicroRNAs (miRNAs, miRs) are naturally occurring small RNAs (approximately 22 nucleotides in length) that have critical functions in a variety of biological processes, including tumorigenesis. They are an important target for detection technology for future medical diagnostics. In this paper we report an electrochemical method for miRNA detection based on paramagnetic beads and enzyme amplification. In particular, miR 222 was chosen as model sequence, because of its involvement in brain, lung, and liver cancers. The proposed bioassay is based on biotinylated DNA capture probes immobilized on streptavidin-coated paramagnetic beads. Total RNA was extracted from the cell sample, enriched for small RNA, biotinylated, and then hybridized with the capture probe on the beads. The beads were then incubated with streptavidin-alkaline phosphatase and exposed to the appropriate enzymatic substrate. The product of the enzymatic reaction was electrochemically monitored. The assay was finally tested with a compact microfluidic device which enables multiplexed analysis of eight different samples with a detection limit of 7 pmol L(-1) and RSD = 15 %. RNA samples from non-small-cell lung cancer and glioblastoma cell lines were also analyzed.
- Published
- 2013
7. Renal insufficiency following contrast media administration trial II (REMEDIAL II): RenalGuard system in high-risk patients for contrast-induced acute kidney injury: rationale and design
- Author
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Briguori, C, Visconti, G, Ricciardelli, B, Condorelli, G, Airoldi, F, De Micco, F, Focaccio, A, Giannone, R, Golia, B, Quintavalle, C, Caiazzo, G, Zanca, C, Iaboni, M, Rivera, N, Tavano, D, Bertoli, S, Staine, T, Valgimigli, M, Ferrari, R, Monti, M, Sangiorgi, G, Lambertini, S, Briguori, C., Visconti, Gabriella, Ricciardelli, B., Condorelli, Gerolama, and REMEDIAL II, I. n. v. e. s. t. i. g. a. t. o. r. s.
- Subjects
Time Factors ,Contrast Media ,Settore MED/11 - Malattie dell'Apparato Cardiovascolare ,Radiography, Interventional ,law.invention ,chemistry.chemical_compound ,Randomized controlled trial ,law ,Furosemide ,Risk Factors ,Clinical endpoint ,Renal Insufficiency ,Diuretics ,Framingham Risk Score ,Interventional ,Acute kidney injury ,Equipment Design ,Acute Kidney Injury ,Chi-Square Distribution ,Humans ,Research Design ,Italy ,Risk Assessment ,Fluid Therapy ,Treatment Outcome ,Acetylcysteine ,Kidney Diseases ,Triiodobenzoic Acids ,Sodium Bicarbonate ,Drug Therapy, Combination ,Creatinine ,Glomerular Filtration Rate ,Chronic Disease ,Biological Markers ,Combination ,Cardiology and Cardiovascular Medicine ,medicine.drug ,medicine.medical_specialty ,Urology ,Renal function ,Drug Therapy ,medicine ,business.industry ,medicine.disease ,Iodixanol ,Surgery ,Radiography ,chemistry ,business ,Biomarkers ,Kidney disease - Abstract
Aims The combined prophylactic strategy of sodium bicarbonate plus N-acetylsyteine (NAC) seems to be effective in preventing contrast induced acute kidney injury (CI-AKI) in patients at low-to-medium risk. However, in patients at high and very high risk the rate of CI-AKI is still high. In this subset of patients the anticipated advantages of the RenalGuard(tm) System should be investigated. The RenalGuard(tm) System (PLC Medical Systems, Inc., Franklin, MA, USA) is a real-time measurement and real time matched fluid replacement device designed to accommodate the RenalGuard therapy, which is based on the theory that creating and maintaining a high urine output is beneficial by allowing a quick elimination of contrast media, and, therefore, reducing its toxic effects. Methods and results The REMEDIAL II trial is a randomised, multicentre, investigator-sponsored trial addressing the hypothesis that the RenalGuard System is superior to the prophylaxis with sodium bicarbonate infusion plus NAC in preventing CI-AKI in high and very high risk patients. Consecutive patients with chronic kidney disease (CKD) and at high to very high risk for CI-AKI, referred to our institutions for coronary and/or peripheral procedures, will be randomly assigned to 1) prophylactic administration of sodium bicarbonate plus NAC (control group) and 2) RenalGuard System treatment (RenalGuard group). All enrolled patients must have an estimated glomerular filtration rate ≤ 30 ml/min/1.73 m2 and/or a contrast nephropathy risk score ≥ 11. In all cases iodixanol (an iso-osmolar, non-ionic contrast agent) will be administered. The primary endpoint is an increase of ≥ 0.3 mg/dL in the serum creatinine concentration 48 hours after the procedure. Conclusions The REMEDIAL II trial will give important answers on how to prevent CI-AKI in high and very high risk patients undergoing contrast media exposure.
- Published
- 2011
8. Effect of miR-21 and miR-30b/c on TRAIL-induced apoptosis in glioma cells
- Author
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Quintavalle, C, primary, Donnarumma, E, additional, Iaboni, M, additional, Roscigno, G, additional, Garofalo, M, additional, Romano, G, additional, Fiore, D, additional, De Marinis, P, additional, Croce, C M, additional, and Condorelli, G, additional
- Published
- 2012
- Full Text
- View/download PDF
9. miR-221/222 overexpession in human glioblastoma increases invasiveness by targeting the protein phosphate PTPμ
- Author
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Quintavalle, C, primary, Garofalo, M, additional, Zanca, C, additional, Romano, G, additional, Iaboni, M, additional, del Basso De Caro, M, additional, Martinez-Montero, J C, additional, Incoronato, M, additional, Nuovo, G, additional, Croce, C M, additional, and Condorelli, G, additional
- Published
- 2011
- Full Text
- View/download PDF
10. c-FLIPL enhances anti-apoptotic Akt functions by modulation of Gsk3β activity
- Author
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Quintavalle, C, primary, Incoronato, M, additional, Puca, L, additional, Acunzo, M, additional, Zanca, C, additional, Romano, G, additional, Garofalo, M, additional, Iaboni, M, additional, Croce, C M, additional, and Condorelli, G, additional
- Published
- 2010
- Full Text
- View/download PDF
11. c-FLIPL enhances anti-apoptotic Akt functions by modulation of Gsk3β activity.
- Author
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Quintavalle, C., Incoronato, M., Puca, L., Acunzo, M., Zanca, C., Romano, G., Garofalo, M., Iaboni, M., Croce, C. M., and Condorelli, G.
- Subjects
SERINE proteinases ,PROTEIN kinases ,APOPTOSIS ,DNA ,TUMOR necrosis factors ,CANCER cells - Abstract
Akt is a serine-threonine kinase that has an important role in transducing survival signals. Akt also regulates a number of proteins involved in the apoptotic process. To find new Akt interactors, we performed a two-hybrid screening in yeast using full-length Akt cDNA as bait and a human cDNA heart library as prey. Among 200 clones obtained, two of them were identified as coding for the c-FLIP
L protein. c-FLIPL is an endogenous inhibitor of death receptor-induced apoptosis through the caspase-8 pathway. Using co-immunoprecipitation experiments of either transfected or endogenous proteins, we confirmed the interaction between Akt and c-FLIPL . Furthermore, we observed that c-FLIPL overexpression interferes with Gsk3-β phosphorylation levels. Moreover, through its effects on Gsk3β, c-FLIPL overexpression in cancer cells induced resistance to tumor necrosis factor-related apoptosis-inducing ligand (TRAIL). This effect was mediated by the regulation of p27Kip1 and caspase-3 expression. These results indicate the existence of a new mechanism of resistance to TRAIL in cancer cells, and unexpected functions of c-FLIPL . [ABSTRACT FROM AUTHOR]- Published
- 2010
- Full Text
- View/download PDF
12. c-FLIPL enhances anti-apoptotic Akt functions by modulation of Gsk3β activity
- Author
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Quintavalle, C, Incoronato, M, Puca, L, Acunzo, M, Zanca, C, Romano, G, Garofalo, M, Iaboni, M, Croce, C M, and Condorelli, G
- Abstract
This corrects the article DOI: 10.1038/cdd.2010.65
- Published
- 2017
- Full Text
- View/download PDF
13. An anti-PDGFRβ aptamer for selective delivery of small therapeutic peptide to cardiac cells
- Author
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Alessandra Romanelli, Alessandra Affinito, Margherita Iaboni, Jessica Modica, Paola Ceriotti, Geroloma Condorelli, Concetta Avitabile, Silvia Catuogno, Daniele Catalucci, Romanelli, A, Affinito, A, Avitabile, C, Catuogno, S, Ceriotti, P, Iaboni, M, Modica, J, Condorelli, G, and Catalucci, D.
- Subjects
0301 basic medicine ,Adenosine ,Physiology ,Molecular biology ,Cell Membranes ,Intracellular Space ,Glycobiology ,lcsh:Medicine ,Peptide ,Biochemistry ,Ion Channels ,Mass Spectrometry ,Analytical Chemistry ,Mice ,Spectrum Analysis Techniques ,Medicine and Health Sciences ,Myocytes, Cardiac ,RNA structure ,Receptor ,lcsh:Science ,Liquid Chromatography ,chemistry.chemical_classification ,Drug Carriers ,Multidisciplinary ,Protein Stability ,Chemistry ,Physics ,Chromatographic Techniques ,aptamer ,Nucleosides ,Heart ,Aptamers, Nucleotide ,Glycosylamines ,Cell biology ,Electrophysiology ,Nucleic acids ,Physical Sciences ,Click chemistry ,Cellular Structures and Organelles ,Anatomy ,Drug carrier ,Research Article ,cardiac disease ,Calcium Channels, L-Type ,Liquid Chromatography-Mass Spectrometry ,Protein subunit ,Aptamer ,Blotting, Western ,Biophysics ,Neurophysiology ,Research and Analysis Methods ,Cell Line ,mimetic petide ,Receptor, Platelet-Derived Growth Factor beta ,03 medical and health sciences ,Chimera (genetics) ,Animals ,030102 biochemistry & molecular biology ,lcsh:R ,Water ,Biology and Life Sciences ,Membrane Proteins ,Proteins ,Cardiovascular Agents ,Cell Biology ,Voltage-Sensitive Dye Imaging ,Macromolecular structure analysis ,030104 developmental biology ,Cell culture ,drug delivery ,Cardiovascular Anatomy ,RNA ,Calcium ,Click Chemistry ,lcsh:Q ,Calcium Channels ,Peptides ,Neuroscience - Abstract
[object Object]Small therapeutic peptides represent a promising field for the treatment of pathologies such as cardiac diseases. However, the lack of proper target-selective carriers hampers their translation towards a potential clinical application. Aptamers are cell-specific carriers that bind with high affinity to their specific target. However, some limitations on their conjugation to small peptides and the functionality of the resulting aptamer-peptide chimera exist. Here, we generated a novel aptamer-peptide chimera through conjugation of the PDGFR?-targeting Gint4.T aptamer to MP, a small mimetic peptide that via targeting of the Cav?2 subunit of the L-type calcium channel (LTCC) can recover myocardial function in pathological heart conditions associated with defective LTCC function. The conjugation reaction was performed by click chemistry in the presence of N,N,N',N',N"-pentamethyldiethylenetriamine as a Cu (I) stabilizing agent in a DMSO-free aqueous buffer. When administered to cardiac cells, the Gint4.T-MP aptamer-peptide chimera was successfully internalized in cells, allowing the functional targeting of MP to LTCC. This approach represents the first example of the use of an internalizing aptamer for selective delivery of a small therapeutic peptide to cardiac cells.
- Published
- 2018
14. MiR-221 promotes stemness of breast cancer cells by targeting DNMT3b
- Author
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Matilde Todaro, Danilo Fiore, Cristina Quintavalle, Ilaria Puoti, Miriam Gaggianesi, Carlo M. Croce, Margherita Iaboni, Giuseppina Roscigno, Manel Esteller, Gerolama Condorelli, Angel Diaz-Lagares, G. Cortino, Valentina Russo, Renato Thomas, Elvira Donnarumma, Giulia Romano, Roscigno G., Quintavalle C., Donnarumma E., Puoti I., Diaz-Lagares A., Iaboni M., Fiore D., Russo V., Todaro M., Romano G., Thomas R., Cortino G., Gaggianesi M., Esteller M., Croce C.M., Condorelli G., Universitat de Barcelona, Roscigno, Giuseppina, Quintavalle, Cristina, Donnarumma, Elvira, Puoti, I, Diaz Lagares, A, Iaboni, Margherita, Fiore, Danilo, Russo, V, Todaro, M, Romano, G, Thomas, R, Cortino, G, Gaggianesi, M, Esteller, M, Croce, Cm, and Condorelli, Gerolama
- Subjects
cancer stem cells ,0301 basic medicine ,Micro RNAs ,Cellular differentiation ,ADN ,DNMT ,Stem cells ,Stem cell marker ,medicine.disease_cause ,Bioinformatics ,MCF-7 Cell ,0302 clinical medicine ,Breast cancer ,HEK293 Cell ,Tumor Cells, Cultured ,DNA (Cytosine-5-)-Methyltransferases ,Oligonucleotide Array Sequence Analysis ,Microscopy, Confocal ,Reverse Transcriptase Polymerase Chain Reaction ,MicroRNA ,Homeodomain Protein ,Nanog Homeobox Protein ,microRNAs ,Gene Expression Regulation, Neoplastic ,Oncology ,030220 oncology & carcinogenesis ,MCF-7 Cells ,Neoplastic Stem Cells ,RNA Interference ,Cèl·lules mare ,Breast Neoplasm ,Research Paper ,Human ,Homeobox protein NANOG ,Blotting, Western ,Breast Neoplasms ,Biology ,Càncer de mama ,03 medical and health sciences ,microRNAs, breast cancer, cancer stem cells, DNMT ,Cancer stem cell ,Cell Line, Tumor ,Spheroids, Cellular ,medicine ,Humans ,Homeodomain Proteins ,Oligonucleotide Array Sequence Analysi ,Gene Expression Profiling ,Cancer ,DNA ,medicine.disease ,Molecular medicine ,MicroRNAs ,HEK293 Cells ,030104 developmental biology ,DNA (Cytosine-5-)-Methyltransferase ,Cancer research ,Neoplastic Stem Cell ,Carcinogenesis ,Octamer Transcription Factor-3 - Abstract
// Giuseppina Roscigno 1, 2 , Cristina Quintavalle 1, 2 , Elvira Donnarumma 3 , Ilaria Puoti 1 , Angel Diaz-Lagares 4 , Margherita Iaboni 1 , Danilo Fiore 1 , Valentina Russo 1 , Matilde Todaro 5 , Giulia Romano 6 , Renato Thomas 7 , Giuseppina Cortino 7 , Miriam Gaggianesi 5 , Manel Esteller 4 , Carlo M. Croce 6 , Gerolama Condorelli 1, 2 1 Department of Molecular Medicine and Medical Biotechnology, “Federico II” University of Naples, Naples, Italy 2 IEOS-CNR, Naples, Italy 3 IRCCS-SDN, Naples, Italy 4 Epigenetic and Cancer Biology Program (PEBC) IDIBELL, Hospital Duran I Reynals, Barcelona, Spain 5 Department of Surgical and Oncological Sciences, Cellular and Molecular Pathophysiology Laboratory, University of Palermo, Palermo, Italy 6 Department of Molecular Virology, Immunology and Medical Genetics, Human Cancer Genetics Program, Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA 7 Department of Surgical and Oncology, Clinica Mediterranea, Naples, Italy Correspondence to: Gerolama Condorelli, e-mail: gecondor@unina.it Keywords: microRNAs, breast cancer, cancer stem cells, DNMT Received: June 15, 2015 Accepted: October 09, 2015 Published: October 19, 2015 ABSTRACT Cancer stem cells (CSCs) are a small part of the heterogeneous tumor cell population possessing self-renewal and multilineage differentiation potential as well as a great ability to sustain tumorigenesis. The molecular pathways underlying CSC phenotype are not yet well characterized. MicroRNAs (miRs) are small noncoding RNAs that play a powerful role in biological processes. Early studies have linked miRs to the control of self-renewal and differentiation in normal and cancer stem cells. We aimed to study the functional role of miRs in human breast cancer stem cells (BCSCs), also named mammospheres. We found that miR-221 was upregulated in BCSCs compared to their differentiated counterpart. Similarly, mammospheres from T47D cells had an increased level of miR-221 compared to differentiated cells. Transfection of miR-221 in T47D cells increased the number of mammospheres and the expression of stem cell markers. Among miR-221’s targets, we identified DNMT3b. Furthermore, in BCSCs we found that DNMT3b repressed the expression of various stemness genes, such as Nanog and Oct 3/4 , acting on the methylation of their promoters, partially reverting the effect of miR-221 on stemness. We hypothesize that miR-221 contributes to breast cancer tumorigenicity by regulating stemness, at least in part through the control of DNMT3b expression.
- Published
- 2016
15. Fluorescence-based absolute quantification of near-infrared probes in tissue extracts for biodistribution analyses.
- Author
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Iaboni M, Coppo A, Remotti D, Queliti R, Blasi F, Bussi S, Cabella C, and Poggi L
- Subjects
- Animals, Fluorescence, Tissue Distribution, Fluorescent Dyes, Tissue Extracts
- Abstract
In recent years, significant progress has been made in the development of fluorescent contrast agents for clinical applications. For the development of a fluorescent probe, it is crucial to evaluate its safety profile, including biodistribution. Specific methods need to be developed for the absolute quantification of fluorescent probes in tissue specimens from animals administered with test compounds in the framework of biodistribution/efficacy/toxicity studies. Here, we describe a new method for the absolute quantification of fluorescent probes in tissue specimens from animals administered with compounds that have absorption and emission wavelength in the Near-Infrared region (600-800 nm). The protocol is based on the standard addition approach in order to minimize the interference of the matrix on the analyte signal causing inaccuracy in the absolute determination of the concentration. The measurement of the fluorescence intensity is done via a microplate reader. The method has been fully validated and applied for the quantification of a fluorescence-guided surgery targeted contrast agent in a Good Laboratory Practice (GLP) biodistribution study. Results clearly demonstrate that this procedure is fully applicable in a preclinical setting and that it overcomes common issues associated with fluorescence signal quantification in tissue extracts., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:All the authors are employees of Bracco Imaging SpA, which is the applicant of a pending patent claiming, among else, the Test Article described in this manuscript., (Copyright © 2023 Elsevier Inc. All rights reserved.)
- Published
- 2023
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- View/download PDF
16. Selection of RNA aptamers targeting hypoxia in cancer.
- Author
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Nuzzo S, Iaboni M, Ibba ML, Rienzo A, Musumeci D, Franzese M, Roscigno G, Affinito A, Petrillo G, Quintavalle C, Ciccone G, Esposito CL, and Catuogno S
- Abstract
Hypoxia plays a crucial role in tumorigenesis and drug resistance, and it is recognised as a major factor affecting patient clinical outcome. Therefore, the detection of hypoxic areas within the tumour micro-environment represents a useful way to monitor tumour growth and patients' responses to treatments, properly guiding the choice of the most suitable therapy. To date, non-invasive hypoxia imaging probes have been identified, but their applicability in vivo is strongly limited due to an inadequate resistance to the low oxygen concentration and the acidic pH of the tumour micro-environment. In this regard, nucleic acid aptamers represent very powerful tools thanks to their peculiar features, including high stability to harsh conditions and a small size, resulting in easy and efficient tumour penetration. Here, we describe a modified cell-SELEX (Systematic Evolution of Ligands by EXponential enrichment) approach that allows the isolation of specific RNA aptamers for the detection of the hypoxic phenotype in breast cancer (BC) cells. We demonstrated the effectiveness of the proposed method in isolating highly stable aptamers with an improved and specific binding to hypoxic cells. To our knowledge, this is the first example of a cell-SELEX approach properly designed and modified to select RNA aptamers against hypoxia-related epitopes expressed on tumour cell surfaces. The selected aptamers may provide new effective tools for targeting hypoxic areas within the tumour with great clinical potential., Competing Interests: Author MI was employed by Bracco Imaging S.p.A. Author AA was employed by Percuros B.V. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Nuzzo, Iaboni, Ibba, Rienzo, Musumeci, Franzese, Roscigno, Affinito, Petrillo, Quintavalle, Ciccone, Esposito and Catuogno.)
- Published
- 2022
- Full Text
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17. Extracellular circulating miRNAs as stress-related signature to search and rescue dogs.
- Author
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Guelfi G, Iaboni M, Sansone A, Capaccia C, Santoro MM, and Diverio S
- Subjects
- Animals, Dogs, Gene Expression Regulation, Humans, Tumor Suppressor Protein p53 metabolism, Working Dogs, Circulating MicroRNA genetics, MicroRNAs genetics, MicroRNAs metabolism
- Abstract
Our research explores serum extracellular circulating miRNAs (ecmiRNAs) involved in dog stress response immediately after the search and rescue (SAR) of missing people. The experimental plan considers four arduous SAR simulations. The SAR dogs are trained by the Alpine School of the Military Force of Guardia di Finanza (Passo Rolle, Italy). The First SAR Trial analyzed dog serum samples at rest time (T0), and immediately after SAR performance (T1) using the miRNome-wide screening next-generation sequencing (NGS). T1 versus T0 NGS results revealed a different expression level of let-7a and let-7f. Subsequently, in a large sample size including: 1st (n = 6), 2nd (n = 6), 3rd (n = 6), and 4th (n = 4) trials, let-7a and let-7f were validated by qPCR. Bioinformatics analysis with TarBase (v.8) and the Diana-mirPath (v.3) revealed a functional role of let-7a and let-7f in the p53 pathway to restore cellular homeostasis. Let-7a and let-7f, highly expressed at T1, could stop MDMs-p53 inhibition inducing the p53 increase in level. In addition, let-7a and let-7f, via p53 post-transcriptional regulation, buffers p53 transcription spikes. During SAR stress, the possibility of p53 preconditioning could explain the phenomenon of "stress hardening" where the tolerance of particular stress increases after preconditioning., (© 2022. The Author(s).)
- Published
- 2022
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18. How Do Avalanche Dogs (and Their Handlers) Cope with Physical Exercise? Heart Rate Changes during Endurance in a Snowy Environment.
- Author
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Menchetti L, Iaboni M, Santoro MM, Guelfi G, and Diverio S
- Abstract
This study aimed to assess the heart rate (HR) responses of avalanche SAR dogs and handlers under working field conditions. Thirteen SAR units (dogs and handlers) performed an exercise ( Endurance ) consisting of approximately 5.5 km of rough tracks through deep snow, at an altitude of 1991-2250 m.a.s.l. The exercise was repeated twice for each of the two different tracks. Both handlers and dogs were equipped with a global positioning satellite/heart rate (GPS/HR) system (Polar
® ). Multivariable models were used to evaluate the effects of environmental (i.e., gradient, altitude, track, and time) and intrinsic (i.e., speed, repetition, and breed) factors on changes from baseline HR (Δ%HR). The dog's Δ%HR was greater in the flat and uphill compared with downhill, and increased progressively as the speed increased ( p < 0.001). Moreover, it rose at altitudes above 2100 m.a.s.l. and peaked after 30 min of the Endurance activity ( p < 0.01). These findings indicated that HR monitors could be a valuable tool to contribute to the evaluation of avalanche dogs' fitness in their real working environment. In contrast, the lack of correlation between the dogs' and handlers' HR changes suggests that handlers might not perceive the physical conditions of their dog in real-time. Thus, implementing protocols to monitor avalanche SAR dogs' fitness using a GPS/HR monitoring system could help handlers to tailor the training and workload and to detect the risk factors for physical distress of working dogs.- Published
- 2022
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- View/download PDF
19. Biotin oligonucleotide labeling reactions: A method to assess their effectiveness and reproducibility.
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Di Vito A, Reitano E, Poggi L, and Iaboni M
- Subjects
- Biotin chemistry, Kinetics, Biotinylation methods, Oligonucleotides chemistry, RNA chemistry, Staining and Labeling methods
- Abstract
The strong molecular interaction between biotin and streptavidin is widely used in the growing field of nucleic acid nanotechnology. Several biotin labeled oligonucleotide tools have been developed for the detection of biological molecules as well as for protein purification. For these reasons, biotinylation can be considered one of the main chemical reactions for nucleic acid labeling. However, despite its widespread application and the presence on the market of many reagents for the conjugation of biotin to oligonucleotides, it is not yet available a cheap, easy and sensitive system able to assess the effectiveness and reproducibility of this reaction. Here, we present an accurate and reliable method to achieve a qualitative and quantitative analysis of oligonucleotide biotinylation. The protocol employs basic laboratory instruments and standard software for molecular biology applications and does not require advanced expertise for its execution. Most importantly, our method is independent from complex kinetic equilibrium parameters and shows a limit of detection more than one order of magnitude lower than the current fluorometric gold standard assay. Therefore, this method could become a standard, inexpensive and routinely used quality test for post-synthesis evaluation of biotin conjugation reactions., Competing Interests: Declaration of competing interest None., (Copyright © 2020 Elsevier Inc. All rights reserved.)
- Published
- 2020
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20. An anti-PDGFRβ aptamer for selective delivery of small therapeutic peptide to cardiac cells.
- Author
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Romanelli A, Affinito A, Avitabile C, Catuogno S, Ceriotti P, Iaboni M, Modica J, Condorelli G, and Catalucci D
- Subjects
- Animals, Blotting, Western, Calcium metabolism, Calcium Channels, L-Type metabolism, Cardiovascular Agents chemical synthesis, Cardiovascular Agents chemistry, Cell Line, Click Chemistry, Intracellular Space drug effects, Intracellular Space metabolism, Mice, Myocytes, Cardiac metabolism, Peptides chemical synthesis, Peptides chemistry, Protein Stability, Voltage-Sensitive Dye Imaging, Water chemistry, Aptamers, Nucleotide, Cardiovascular Agents administration & dosage, Drug Carriers, Myocytes, Cardiac drug effects, Peptides administration & dosage, Receptor, Platelet-Derived Growth Factor beta metabolism
- Abstract
Small therapeutic peptides represent a promising field for the treatment of pathologies such as cardiac diseases. However, the lack of proper target-selective carriers hampers their translation towards a potential clinical application. Aptamers are cell-specific carriers that bind with high affinity to their specific target. However, some limitations on their conjugation to small peptides and the functionality of the resulting aptamer-peptide chimera exist. Here, we generated a novel aptamer-peptide chimera through conjugation of the PDGFRβ-targeting Gint4.T aptamer to MP, a small mimetic peptide that via targeting of the Cavβ2 subunit of the L-type calcium channel (LTCC) can recover myocardial function in pathological heart conditions associated with defective LTCC function. The conjugation reaction was performed by click chemistry in the presence of N,N,N',N',N"-pentamethyldiethylenetriamine as a Cu (I) stabilizing agent in a DMSO-free aqueous buffer. When administered to cardiac cells, the Gint4.T-MP aptamer-peptide chimera was successfully internalized in cells, allowing the functional targeting of MP to LTCC. This approach represents the first example of the use of an internalizing aptamer for selective delivery of a small therapeutic peptide to cardiac cells.
- Published
- 2018
- Full Text
- View/download PDF
21. Cancer-associated fibroblasts release exosomal microRNAs that dictate an aggressive phenotype in breast cancer.
- Author
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Donnarumma E, Fiore D, Nappa M, Roscigno G, Adamo A, Iaboni M, Russo V, Affinito A, Puoti I, Quintavalle C, Rienzo A, Piscuoglio S, Thomas R, and Condorelli G
- Subjects
- Apoptosis, Biomarkers, Tumor genetics, Breast Neoplasms genetics, Cancer-Associated Fibroblasts, Cell Proliferation, Female, Gene Expression Regulation, Neoplastic, Humans, Neoplasm Staging, Phenotype, Prognosis, Signal Transduction, Tumor Cells, Cultured, Breast Neoplasms pathology, Epithelial-Mesenchymal Transition, Exosomes genetics, MicroRNAs genetics, Tumor Microenvironment genetics
- Abstract
Cancer-associated fibroblasts (CAFs) are the major components of the tumor microenvironment. They may drive tumor progression, although the mechanisms involved are still poorly understood. Exosomes have emerged as important mediators of intercellular communication in cancer. They mediate horizontal transfer of microRNAs (miRs), mRNAs and proteins, thus affecting breast cancer progression. Differential expression profile analysis identified three miRs (miRs -21, -378e, and -143) increased in exosomes from CAFs as compared from normal fibroblasts. Immunofluorescence indicated that exosomes may be transferred from CAFs to breast cancer cells, releasing their cargo miRs. Breast cancer cells (BT549, MDA-MB-231, and T47D lines) exposed to CAF exosomes or transfected with those miRs exhibited a significant increased capacity to form mammospheres, increased stem cell and epithelial-mesenchymal transition (EMT) markers, and anchorage-independent cell growth. These effects were reverted by transfection with anti-miRs. Similarly to CAF exosomes, normal fibroblast exosomes transfected with miRs -21, -378e, and -143 promoted the stemness and EMT phenotype of breast cancer cells. Thus, we provided evidence for the first time of the role of CAF exosomes and their miRs in the induction of the stemness and EMT phenotype in different breast cancer cell lines. Indeed, CAFs strongly promote the development of an aggressive breast cancer cell phenotype.
- Published
- 2017
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22. Targeting Insulin Receptor with a Novel Internalizing Aptamer.
- Author
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Iaboni M, Fontanella R, Rienzo A, Capuozzo M, Nuzzo S, Santamaria G, Catuogno S, Condorelli G, de Franciscis V, and Esposito CL
- Abstract
Nucleic acid-based aptamers are emerging as therapeutic antagonists of disease-associated proteins such as receptor tyrosine kinases. They are selected by an in vitro combinatorial chemistry approach, named Systematic Evolution of Ligands by Exponential enrichment (SELEX), and thanks to their small size and unique chemical characteristics, they possess several advantages over antibodies as diagnostics and therapeutics. In addition, aptamers that rapidly internalize into target cells hold as well great potential for their in vivo use as delivery tools of secondary therapeutic agents. Here, we describe a nuclease resistant RNA aptamer, named GL56, which specifically recognizes the insulin receptor (IR). Isolated by a cell-based SELEX method that allows enrichment for internalizing aptamers, GL56 rapidly internalizes into target cells and is able to discriminate IR from the highly homologous insulin-like growth factor receptor 1. Notably, when applied to IR expressing cancer cells, the aptamer inhibits IR dependent signaling. Given the growing interest in the insulin receptor as target for cancer treatment, GL56 reveals a novel molecule with great translational potential as inhibitor and delivery tool for IR-dependent cancers.
- Published
- 2016
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- View/download PDF
23. A simulated avalanche search and rescue mission induces temporary physiological and behavioural changes in military dogs.
- Author
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Diverio S, Barbato O, Cavallina R, Guelfi G, Iaboni M, Zasso R, Di Mari W, Santoro MM, and Knowles TG
- Subjects
- Animals, Aspartate Aminotransferases blood, Behavior, Animal physiology, Blood Pressure physiology, Creatine Kinase blood, Fatty Acids, Nonesterified blood, Female, Heart Rate physiology, Hydrocortisone blood, L-Lactate Dehydrogenase blood, Male, Military Personnel, Radioimmunoassay, Avalanches, Dogs physiology, Rescue Work, Risk Reduction Behavior
- Abstract
Saving human lives is of paramount importance in avalanche rescue missions. Avalanche military dogs represent an invaluable resource in these operations. However, their performance can be influenced by several environmental, social and transport challenges. If too severe, these are likely to activate a range of responses to stress, which might put at risk the dogs' welfare. The aim of this study was to assess the physiological and behavioural responses of a group of military dogs to a Simulated Avalanche Search and Rescue mission (SASR). Seventeen avalanche dogs from the Italian Military Force Guardia di Finanza (SAGF dogs) were monitored during a simulated search for a buried operator in an artificial avalanche area (SASR). Heart rate (HR), body temperature (RBT) and blood samples were collected at rest the day before the trial (T0), immediately after helicopter transport at the onset of the SASR (T1), after the discovery of the buried operator (T2) and 2h later (T3). Heart rate (HR), rectal body temperature (RBT), cortisol, aspartate aminotransferase (AST), creatine kinase (CK), non-esterified fatty acids (NEFA) and lactate dehydrogenase (LDH) were measured. During the search mission the behaviour of each SAGF dog was measured by focal animal sampling and qualitatively assessed by its handler and two observers. Inter-rater agreement was evaluated. Snow and environmental variables were also measured. All dogs successfully completed their search for the buried, simulated victim within 10min. The SASR was shown to exert significant increases on RBT, NEFA and cortisol (P<0.001), CK and HR (P<0.01), AST and LDH (P<0.05). These indicate the activation of a response to stress probably induced by the addition of factors such as helicopter transport, disembarking, and the search and rescue exercise. However, changes were moderate and limited over time, progressively decreasing with complete recovery at T3 except for sera cortisol that showed a slightly slower decline. More time walking within the search was related to lower RBT, conversely to walking. Standing still with head up and exploring with head-up were inversely related with HR. Agreement between handler and observers' opinions on a dog's search mission ability was found only for motivation, signalling behaviour, signs of stress and possessive reward playing. More time signalling was related to shorter search time. In conclusion, despite extreme environmental and training conditions only temporary physiological and behavioural changes were recorded in the avalanche dogs. Their excellent performance in successful simulated SASR may be attributable to extensive training and good dog-handler relationships. Simulated SASR did not seem to impair SAGF dogs' performance or welfare., (Copyright © 2016 Elsevier Inc. All rights reserved.)
- Published
- 2016
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24. miR-340 predicts glioblastoma survival and modulates key cancer hallmarks through down-regulation of NRAS.
- Author
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Fiore D, Donnarumma E, Roscigno G, Iaboni M, Russo V, Affinito A, Adamo A, De Martino F, Quintavalle C, Romano G, Greco A, Soini Y, Brunetti A, Croce CM, and Condorelli G
- Subjects
- 3' Untranslated Regions genetics, A549 Cells, Animals, Brain Neoplasms metabolism, Brain Neoplasms pathology, Cell Line, Tumor, Female, GTP Phosphohydrolases metabolism, Genes, Tumor Suppressor, Glioblastoma metabolism, Glioblastoma pathology, Humans, Kaplan-Meier Estimate, MCF-7 Cells, Membrane Proteins metabolism, Mice, Nude, Prognosis, Survivors, Transplantation, Heterologous, Brain Neoplasms genetics, Down-Regulation, GTP Phosphohydrolases genetics, Gene Expression Regulation, Neoplastic, Glioblastoma genetics, Membrane Proteins genetics, MicroRNAs genetics
- Abstract
Glioblastoma is the most common primary brain tumor in adults; with a survival rate of 12 months from diagnosis. However, a small subgroup of patients, termed long-term survivors (LTS), has a survival rate longer then 12-14 months. There is thus increasing interest in the identification of molecular signatures predicting glioblastoma prognosis and in how to improve the therapeutic approach. Here, we report miR-340 as prognostic tumor-suppressor microRNA for glioblastoma. We analyzed microRNA expression in > 500 glioblastoma patients and found that although miR-340 is strongly down-regulated in glioblastoma overall, it is up-regulated in LTS patients compared to short-term survivors (STS). Indeed, miR-340 expression predicted better prognosis in glioblastoma patients. Coherently, overexpression of miR-340 in glioblastoma cells was found to produce a tumor-suppressive activity. We identified NRAS mRNA as a critical, direct target of miR-340: in fact, miR-340 negatively influenced multiple aspects of glioblastoma tumorigenesis by down-regulating NRAS and downstream AKT and ERK pathways. Thus, we demonstrate that expression of miR-340 in glioblastoma is responsible for a strong tumor-suppressive effect in LTS patients by down-regulating NRAS. miR-340 may thus represent a novel marker for glioblastoma diagnosis and prognosis, and may be developed into a tool to improve treatment of glioblastoma.
- Published
- 2016
- Full Text
- View/download PDF
25. Aptamer-miRNA-212 Conjugate Sensitizes NSCLC Cells to TRAIL.
- Author
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Iaboni M, Russo V, Fontanella R, Roscigno G, Fiore D, Donnarumma E, Esposito CL, Quintavalle C, Giangrande PH, de Franciscis V, and Condorelli G
- Abstract
TNF-related apoptosis-inducing ligand (TRAIL) is a promising antitumor agent for its remarkable ability to selectively induce apoptosis in cancer cells, without affecting the viability of healthy bystander cells. The TRAIL tumor suppressor pathway is deregulated in many human malignancies including lung cancer. In human non-small cell lung cancer (NSCLC) cells, sensitization to TRAIL therapy can be restored by increasing the expression levels of the tumor suppressor microRNA-212 (miR-212) leading to inhibition of the anti-apoptotic protein PED/PEA-15 implicated in treatment resistance. In this study, we exploited a previously described RNA aptamer inhibitor of the tyrosine kinase receptor Axl (GL21.T) expressed on lung cancer cells, as a means to deliver miR-212 into human NSCLC cells expressing Axl. We demonstrate efficient delivery of miR-212 following conjugation of the miR to GL21.T (GL21.T-miR212 chimera). We show that the chimera downregulates PED and restores TRAIL-mediate cytotoxicity in cancer cells. Importantly, treatment of Axl+ lung cancer cells with the chimera resulted in (i) an increase in caspase activation and (ii) a reduction of cell viability in combination with TRAIL therapy. In conclusion, we demonstrate that the GL21.T-miR212 chimera can be employed as an adjuvant to TRAIL therapy for the treatment of lung cancer.
- Published
- 2016
- Full Text
- View/download PDF
26. MiR-221 promotes stemness of breast cancer cells by targeting DNMT3b.
- Author
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Roscigno G, Quintavalle C, Donnarumma E, Puoti I, Diaz-Lagares A, Iaboni M, Fiore D, Russo V, Todaro M, Romano G, Thomas R, Cortino G, Gaggianesi M, Esteller M, Croce CM, and Condorelli G
- Subjects
- Blotting, Western, Breast Neoplasms genetics, Breast Neoplasms pathology, Cell Line, Tumor, DNA (Cytosine-5-)-Methyltransferases metabolism, Gene Expression Profiling methods, HEK293 Cells, Homeodomain Proteins genetics, Homeodomain Proteins metabolism, Humans, MCF-7 Cells, Microscopy, Confocal, Nanog Homeobox Protein, Octamer Transcription Factor-3 genetics, Octamer Transcription Factor-3 metabolism, Oligonucleotide Array Sequence Analysis, RNA Interference, Reverse Transcriptase Polymerase Chain Reaction, Spheroids, Cellular metabolism, Tumor Cells, Cultured, DNA Methyltransferase 3B, DNA (Cytosine-5-)-Methyltransferases genetics, Gene Expression Regulation, Neoplastic, MicroRNAs genetics, Neoplastic Stem Cells metabolism
- Abstract
Cancer stem cells (CSCs) are a small part of the heterogeneous tumor cell population possessing self-renewal and multilineage differentiation potential as well as a great ability to sustain tumorigenesis. The molecular pathways underlying CSC phenotype are not yet well characterized. MicroRNAs (miRs) are small noncoding RNAs that play a powerful role in biological processes. Early studies have linked miRs to the control of self-renewal and differentiation in normal and cancer stem cells. We aimed to study the functional role of miRs in human breast cancer stem cells (BCSCs), also named mammospheres. We found that miR-221 was upregulated in BCSCs compared to their differentiated counterpart. Similarly, mammospheres from T47D cells had an increased level of miR-221 compared to differentiated cells. Transfection of miR-221 in T47D cells increased the number of mammospheres and the expression of stem cell markers. Among miR-221's targets, we identified DNMT3b. Furthermore, in BCSCs we found that DNMT3b repressed the expression of various stemness genes, such as Nanog and Oct 3/4, acting on the methylation of their promoters, partially reverting the effect of miR-221 on stemness. We hypothesize that miR-221 contributes to breast cancer tumorigenicity by regulating stemness, at least in part through the control of DNMT3b expression.
- Published
- 2016
- Full Text
- View/download PDF
27. MiR-221/222 target the DNA methyltransferase MGMT in glioma cells.
- Author
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Quintavalle C, Mangani D, Roscigno G, Romano G, Diaz-Lagares A, Iaboni M, Donnarumma E, Fiore D, De Marinis P, Soini Y, Esteller M, and Condorelli G
- Subjects
- Antineoplastic Agents, Alkylating pharmacology, Apoptosis genetics, Cell Line, Tumor, DNA Damage drug effects, DNA Damage genetics, Dacarbazine analogs & derivatives, Dacarbazine pharmacology, Drug Resistance, Neoplasm genetics, Gene Expression Regulation, Neoplastic, Glioma metabolism, Humans, Temozolomide, DNA Modification Methylases genetics, DNA Repair Enzymes genetics, Glioma genetics, MicroRNAs genetics, RNA Interference, RNA, Messenger genetics, Tumor Suppressor Proteins genetics
- Abstract
Glioblastoma multiforme (GBM) is one of the most deadly types of cancer. To date, the best clinical approach for treatment is based on administration of temozolomide (TMZ) in combination with radiotherapy. Much evidence suggests that the intracellular level of the alkylating enzyme O(6)-methylguanine-DNA methyltransferase (MGMT) impacts response to TMZ in GBM patients. MGMT expression is regulated by the methylation of its promoter. However, evidence indicates that this is not the only regulatory mechanism present. Here, we describe a hitherto unknown microRNA-mediated mechanism of MGMT expression regulation. We show that miR-221 and miR-222 are upregulated in GMB patients and that these paralogues target MGMT mRNA, inducing greater TMZ-mediated cell death. However, miR-221/miR-222 also increase DNA damage and, thus, chromosomal rearrangements. Indeed, miR-221 overexpression in glioma cells led to an increase in markers of DNA damage, an effect rescued by re-expression of MGMT. Thus, chronic miR-221/222-mediated MGMT downregulation may render cells unable to repair genetic damage. This, associated also to miR-221/222 oncogenic potential, may poor GBM prognosis.
- Published
- 2013
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28. miR-212 increases tumor necrosis factor-related apoptosis-inducing ligand sensitivity in non-small cell lung cancer by targeting the antiapoptotic protein PED.
- Author
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Incoronato M, Garofalo M, Urso L, Romano G, Quintavalle C, Zanca C, Iaboni M, Nuovo G, Croce CM, and Condorelli G
- Subjects
- Aged, Aged, 80 and over, Apoptosis Regulatory Proteins, Base Sequence, Carcinoma, Non-Small-Cell Lung metabolism, Cell Death drug effects, Down-Regulation, Female, Gene Expression Regulation, Neoplastic, Humans, Intracellular Signaling Peptides and Proteins genetics, Lung Neoplasms metabolism, Male, MicroRNAs antagonists & inhibitors, MicroRNAs genetics, Middle Aged, Molecular Sequence Data, Phosphoproteins genetics, RNA, Messenger genetics, RNA, Messenger metabolism, Transfection, Carcinoma, Non-Small-Cell Lung drug therapy, Carcinoma, Non-Small-Cell Lung genetics, Lung Neoplasms drug therapy, Lung Neoplasms genetics, MicroRNAs biosynthesis, Phosphoproteins biosynthesis, TNF-Related Apoptosis-Inducing Ligand pharmacology
- Abstract
PED/PEA-15 (PED) is a death effector domain family member of 15 kDa with a broad antiapoptotic function found overexpressed in a number of different human tumors, including lung cancer. To date, the mechanisms that regulate PED expression are unknown. Therefore, we address this point by the identification of microRNAs that in non-small cell lung cancer (NSCLC) modulate PED levels. In this work, we identify miR-212 as a negative regulator of PED expression. We also show that ectopic expression of this miR increases tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-induced cell death in NSCLC cells. In contrast, inhibition of endogenous miR-212 by use of antago-miR results in increase of PED protein expression and resistance to TRAIL treatment. Besides, in NSCLC, we show both in vitro and in vivo that PED and miR-212 expressions are inversely correlated, that is, PED is upregulated and miR-212 is rarely expressed. In conclusion, these findings suggest that miR-212 should be considered as a tumor suppressor because it negatively regulates the antiapoptotic protein PED and regulates TRAIL sensitivity., ((c)2010 AACR.)
- Published
- 2010
- Full Text
- View/download PDF
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