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Scardovi AL, Bartolucci D, Montemurro L, Bortolotti S, Angelucci S, Amadesi C, Nieddu G, Oosterholt S, Cerisoli L, Della Pasqua O, Hrelia P, Tonelli R. Preclinical Pharmacokinetics in Tumors and Normal Tissues of the Antigene PNA Oligonucleotide MYCN-Inhibitor BGA002. Nucleic Acid Ther 2024; 34:173-187. [PMID: 38957973 DOI: 10.1089/nat.2024.0005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2024] Open
Abstract
Although MYCN has been considered an undruggable target, MYCN alterations confer poor prognosis in many pediatric and adult cancers. The novel MYCN-specific inhibitor BGA002 is an antigene peptide nucleic acid oligonucleotide covalently bound to a nuclear localization signal peptide. In the present study, we characterized the pharmacokinetics (PK) of BGA002 after single and repeated administration to mice using a novel specific enzyme-linked immunosorbent assay. BGA002 concentrations in plasma showed linear PK, with dose proportional increase across the tested dose levels and similar exposure between male and female and between intravenous and subcutaneous route of administration. Repeated dosing resulted in no accumulation in plasma. Biodistribution up to 7 days after single subcutaneous administration of [14C]-radiolabeled BGA002 showed broad tissues and organ distribution (suggesting a potential capability to reach primary tumor and metastasis in several body sites), with high concentrations in kidney, liver, spleen, lymph nodes, adrenals, and bone marrow. Remarkably, we demonstrated that BGA002 concentrates in tumors after repeated systemic administrations in three mouse models with MYCN amplification (neuroblastoma, rhabdomyosarcoma, and small-cell lung cancer), leading to a significant reduction in tumor weight. Taking into account the available safety profile of BGA002, these data support further evaluation of BGA002 in patients with MYCN-positive tumors.
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Affiliation(s)
| | | | - Luca Montemurro
- AGEOP Ricerca OdV, IRCCS S. Orsola Hospital, Pediatric Oncology and Hematology Unit, Bologna, Italy
| | | | | | | | | | - Sean Oosterholt
- Clinical Pharmacology & Therapeutics Group, University College London, London, United Kingdom
| | | | - Oscar Della Pasqua
- Clinical Pharmacology & Therapeutics Group, University College London, London, United Kingdom
| | - Patrizia Hrelia
- Department of Pharmacy and Biotechnologies, University of Bologna, Bologna, Italy
| | - Roberto Tonelli
- Department of Pharmacy and Biotechnologies, University of Bologna, Bologna, Italy
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2
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López-Tena M, Farrera-Soler L, Barluenga S, Winssinger N. Pseudo-Complementary G:C Base Pair for Mixed Sequence dsDNA Invasion and Its Applications in Diagnostics (SARS-CoV-2 Detection). JACS AU 2023; 3:449-458. [PMID: 36873687 PMCID: PMC9975836 DOI: 10.1021/jacsau.2c00588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 01/18/2023] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
Pseudo-complementary oligonucleotides contain artificial nucleobases designed to reduce duplex formation in the pseudo-complementary pair without compromising duplex formation to targeted (complementary) oligomers. The development of a pseudo-complementary A:T base pair, Us:D, was important in achieving dsDNA invasion. Herein, we report pseudo-complementary analogues of the G:C base pair leveraged on steric and electrostatic repulsion between the cationic phenoxazine analogue of cytosine (G-clamp, C+) and N-7 methyl guanine (G+), which is also cationic. We show that while complementary peptide nucleic acids (PNA) form a much more stable homoduplex than the PNA:DNA heteroduplex, oligomers based on pseudo-C:G complementary PNA favor PNA:DNA hybridization. We show that this enables dsDNA invasion at physiological salt concentration and that stable invasion complexes are obtained with low equivalents of PNAs (2-4 equiv). We harnessed the high yield of dsDNA invasion for the detection of RT-RPA amplicon using a lateral flow assay (LFA) and showed that two strains of SARS-CoV-2 can be discriminated owing to single nucleotide resolution.
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3
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Antigene MYCN Silencing by BGA002 Inhibits SCLC Progression Blocking mTOR Pathway and Overcomes Multidrug Resistance. Cancers (Basel) 2023; 15:cancers15030990. [PMID: 36765949 PMCID: PMC9913109 DOI: 10.3390/cancers15030990] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 01/27/2023] [Accepted: 01/30/2023] [Indexed: 02/08/2023] Open
Abstract
Small-cell lung cancer (SCLC) is the most aggressive lung cancer type, and is associated with smoking, low survival rate due to high vascularization, metastasis and drug resistance. Alterations in MYC family members are biomarkers of poor prognosis for a large number of SCLC. In particular, MYCN alterations define SCLC cases with immunotherapy failure. MYCN has a highly restricted pattern of expression in normal cells and is an ideal target for cancer therapy but is undruggable by traditional approaches. We propose an innovative approach to MYCN inhibition by an MYCN-specific antigene-PNA oligonucleotide (BGA002)-as a new precision medicine for MYCN-related SCLC. We found that BGA002 profoundly and specifically inhibited MYCN expression in SCLC cells, leading to cell-growth inhibition and apoptosis, while also overcoming multidrug resistance. These effects are driven by mTOR pathway block in concomitance with autophagy reactivation, thus avoiding the side effects of targeting mTOR in healthy cells. Moreover, we identified an MYCN-related SCLC gene signature comprehending CNTFR, DLX5 and TNFAIP3, that was reverted by BGA002. Finally, systemic treatment with BGA002 significantly increased survival in MYCN-amplified SCLC mouse models, including in a multidrug-resistant model in which tumor vascularization was also eliminated. These findings warrant the clinical testing of BGA002 in MYCN-related SCLC.
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Bartolucci D, Montemurro L, Raieli S, Lampis S, Pession A, Hrelia P, Tonelli R. MYCN Impact on High-Risk Neuroblastoma: From Diagnosis and Prognosis to Targeted Treatment. Cancers (Basel) 2022; 14:4421. [PMID: 36139583 PMCID: PMC9496712 DOI: 10.3390/cancers14184421] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 09/05/2022] [Accepted: 09/07/2022] [Indexed: 11/16/2022] Open
Abstract
Among childhood cancers, neuroblastoma is the most diffuse solid tumor and the deadliest in children. While to date, the pathology has become progressively manageable with a significant increase in 5-year survival for its less aggressive form, high-risk neuroblastoma (HR-NB) remains a major issue with poor outcome and little survivability of patients. The staging system has also been improved to better fit patient needs and to administer therapies in a more focused manner in consideration of pathology features. New and improved therapies have been developed; nevertheless, low efficacy and high toxicity remain a staple feature of current high-risk neuroblastoma treatment. For this reason, more specific procedures are required, and new therapeutic targets are also needed for a precise medicine approach. In this scenario, MYCN is certainly one of the most interesting targets. Indeed, MYCN is one of the most relevant hallmarks of HR-NB, and many studies has been carried out in recent years to discover potent and specific inhibitors to block its activities and any related oncogenic function. N-Myc protein has been considered an undruggable target for a long time. Thus, many new indirect and direct approaches have been discovered and preclinically evaluated for the interaction with MYCN and its pathways; a few of the most promising approaches are nearing clinical application for the investigation in HR-NB.
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Affiliation(s)
| | - Luca Montemurro
- Pediatric Oncology and Hematology Unit, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
| | | | | | - Andrea Pession
- Pediatric Unit, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
| | - Patrizia Hrelia
- Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy
| | - Roberto Tonelli
- Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy
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5
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Hu X, Liu R, Hou J, Peng W, Wan S, Xu M, Li Y, Zhang G, Zhai X, Liang P, Cui H. SMARCE1 promotes neuroblastoma tumorigenesis through assisting MYCN-mediated transcriptional activation. Oncogene 2022; 41:4295-4306. [PMID: 35978151 DOI: 10.1038/s41388-022-02428-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 07/21/2022] [Accepted: 07/26/2022] [Indexed: 02/07/2023]
Abstract
SMARCE1 gene, encoding a core subunit of SWI/SNF chromatin remodeling complex, is situated on chromosome 17q21-ter region that is frequently gained in neuroblastoma. However, its role in the tumorigenesis remains unknown. Here, we showed that high expression of SMARCE1 was associated with poor prognosis of patients with neuroblastoma, especially those with MYCN amplification. Knockdown of SMARCE1 reduced proliferation, colony formation, and tumorigenicity of neuroblastoma cells. Mechanistically, SMARCE1 directly interacted with MYCN, which was necessary for MYCN-mediated transcriptional activation of downstream target genes including PLK1, ODC1, and E2F2. Overexpression of PLK1, ODC1 or E2F2 significantly reversed the inhibiting effect of SMARCE1 knockdown on the proliferation, colony formation, and tumorigenicity of MYCN-amplified neuroblastoma cells. Moreover, we revealed that MYCN directly regulated SMARCE1 transcription through binding to a non-canonical E-box of SMARCE1 promoter, thus enhancing SMARCE1-MYCN cooperativity. These findings establish SMARCE1 is a critical oncogenic factor in neuroblastoma and provide a new potential target for treatment of neuroblastoma with 17q21-ter gain and MYCN amplification.
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Affiliation(s)
- Xiaosong Hu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China.,Cancer Center, Medical Research Institute, Southwest University, Chongqing, 400716, China
| | - Ruochen Liu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China.,Cancer Center, Medical Research Institute, Southwest University, Chongqing, 400716, China
| | - Jianbing Hou
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China.,Cancer Center, Medical Research Institute, Southwest University, Chongqing, 400716, China
| | - Wen Peng
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China.,Cancer Center, Medical Research Institute, Southwest University, Chongqing, 400716, China
| | - Sicheng Wan
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China.,Cancer Center, Medical Research Institute, Southwest University, Chongqing, 400716, China
| | - Minghao Xu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China.,Cancer Center, Medical Research Institute, Southwest University, Chongqing, 400716, China
| | - Yongsen Li
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China.,Cancer Center, Medical Research Institute, Southwest University, Chongqing, 400716, China
| | - Guanghui Zhang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China.,Cancer Center, Medical Research Institute, Southwest University, Chongqing, 400716, China
| | - Xuan Zhai
- Department of Neurosurgery, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China.,Chongqing Key Laboratory of Pediatrics, Chongqing, 400010, China
| | - Ping Liang
- Department of Neurosurgery, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China. .,Chongqing Key Laboratory of Pediatrics, Chongqing, 400010, China.
| | - Hongjuan Cui
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China. .,Cancer Center, Medical Research Institute, Southwest University, Chongqing, 400716, China.
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6
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Bartolucci D, Pession A, Hrelia P, Tonelli R. Precision Anti-Cancer Medicines by Oligonucleotide Therapeutics in Clinical Research Targeting Undruggable Proteins and Non-Coding RNAs. Pharmaceutics 2022; 14:pharmaceutics14071453. [PMID: 35890348 PMCID: PMC9315662 DOI: 10.3390/pharmaceutics14071453] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/24/2022] [Accepted: 07/08/2022] [Indexed: 12/23/2022] Open
Abstract
Cancer incidence and mortality continue to increase, while the conventional chemotherapeutic drugs confer limited efficacy and relevant toxic side effects. Novel strategies are urgently needed for more effective and safe therapeutics in oncology. However, a large number of proteins are considered undruggable by conventional drugs, such as the small molecules. Moreover, the mRNA itself retains oncological functions, and its targeting offers the double advantage of blocking the tumorigenic activities of the mRNA and the translation into protein. Finally, a large family of non-coding RNAs (ncRNAs) has recently emerged that are also dysregulated in cancer, but they could not be targeted by drugs directed against the proteins. In this context, this review describes how the oligonucleotide therapeutics targeting RNA or DNA sequences, are emerging as a new class of drugs, able to tackle the limitations described above. Numerous clinical trials are evaluating oligonucleotides for tumor treatment, and in the next few years some of them are expected to reach the market. We describe the oligonucleotide therapeutics targeting undruggable proteins (focusing on the most relevant, such as those originating from the MYC and RAS gene families), and for ncRNAs, in particular on those that are under clinical trial evaluation in oncology. We highlight the challenges and solutions for the clinical success of oligonucleotide therapeutics, with particular emphasis on the peculiar challenges that render it arduous to treat tumors, such as heterogeneity and the high mutation rate. In the review are presented these and other advantages offered by the oligonucleotide as an emerging class of biotherapeutics for a new era of precision anti-cancer medicine.
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Affiliation(s)
| | - Andrea Pession
- Pediatric Unit, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy;
| | - Patrizia Hrelia
- Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy;
| | - Roberto Tonelli
- Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy;
- Correspondence:
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Iwanov I, Rossi A, Montesi M, Doytchinova I, Sargsyan A, Momekov G, Panseri S, Naydenova E. Peptide-based targeted cancer therapeutics: design, synthesis and biological evaluation. Eur J Pharm Sci 2022; 176:106249. [PMID: 35779821 DOI: 10.1016/j.ejps.2022.106249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 06/17/2022] [Accepted: 06/28/2022] [Indexed: 11/29/2022]
Abstract
Cancer is the leading cause for human mortality together with cardiovascular diseases. Abl (Abelson) tyrosine kinases play a fundamental role in transducing various signals that control proliferation, survival, migration and invasion in several cancers such as Chronic Myeloid Leukemia (CML), breast cancer and brain cancer. For these reasons Abl tyrosine kinases are considered important biological targets in drug discovery. In this study a series of lysine-based oligopeptides with expected Abl inhibitory activity were designed resembling the binding of FDA-approved drugs (i.e. of Imatinib and Nilotinib), synthesized, purified by High Performance Liquid Chromatography (HPLC), analyzed by mass spectrometry (MS) and biologically tested in vitro in CML (AR-230 and K-562), breast cancers (MDA-MB 231 and MDA-MB 468) and glioblastoma cell lines (U87 and U118). The solid-phase peptide synthesis (SPPS) by Fmoc (9-fluorenylmethoxycarbonyl) chemistry was used to synthesize target compounds. AutoDock Vina was applied for simulation binding to Abl. The biological activities were measured evaluating cytotoxic effect, induction of apoptosis and inhibition of cancer cells migration. The new peptides exhibited different concentration-dependent antiproliferative effect against the tumor cell lines after 72 h treatment. The most promising results were obtained with the U87 glioblastoma cell line where a significant reduction of the migration ability was detected with one compound (H-Lys1-Lys2-Lys3-NH2).
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Affiliation(s)
- Iwan Iwanov
- University of Chemical Technology and Metallurgy, 8 Blvd. Kliment Ohridski, 1756, Sofia, Bulgaria
| | - Arianna Rossi
- Institute of Science and Technology for Ceramics, National Research Council of Italy, via Granarolo 64, Faenza (RA), Italy; University of Messina, Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, Piazza Pugliatti 1, Messina (ME), Italy
| | - Monica Montesi
- Institute of Science and Technology for Ceramics, National Research Council of Italy, via Granarolo 64, Faenza (RA), Italy
| | | | - Armen Sargsyan
- Scientific and Production Center "Armbiotechnology" NAS RA, 14 Gyurjyan str., Yerevan, 0056, Armenia
| | - Georgi Momekov
- Medical University of Sofia, 2 Dunav st., Sofia, 1000, Bulgaria
| | - Silvia Panseri
- Institute of Science and Technology for Ceramics, National Research Council of Italy, via Granarolo 64, Faenza (RA), Italy.
| | - Emilia Naydenova
- University of Chemical Technology and Metallurgy, 8 Blvd. Kliment Ohridski, 1756, Sofia, Bulgaria.
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8
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Lampis S, Raieli S, Montemurro L, Bartolucci D, Amadesi C, Bortolotti S, Angelucci S, Scardovi AL, Nieddu G, Cerisoli L, Paganelli F, Valente S, Fischer M, Martelli AM, Pasquinelli G, Pession A, Hrelia P, Tonelli R. The MYCN inhibitor BGA002 restores the retinoic acid response leading to differentiation or apoptosis by the mTOR block in MYCN-amplified neuroblastoma. J Exp Clin Cancer Res 2022; 41:160. [PMID: 35490242 PMCID: PMC9055702 DOI: 10.1186/s13046-022-02367-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 04/18/2022] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Neuroblastoma is a deadly childhood cancer, and MYCN-amplified neuroblastoma (MNA-NB) patients have the worst prognoses and are therapy-resistant. While retinoic acid (RA) is beneficial for some neuroblastoma patients, the cause of RA resistance is unknown. Thus, there remains a need for new therapies to treat neuroblastoma. Here we explored the possibility of combining a MYCN-specific antigene oligonucleotide BGA002 and RA as therapeutic approach to restore sensitivity to RA in NB. METHODS By molecular and cellular biology techniques, we assessed the combined effect of the two compounds in NB cell lines and in a xenograft mouse model MNA-NB. RESULTS We found that MYCN-specific inhibition by BGA002 in combination with RA (BGA002-RA) act synergistically and overcame resistance in NB cell lines. BGA002-RA also reactivated neuron differentiation (or led to apoptosis) and inhibited invasiveness capacity in MNA-NB. Moreover, we found that neuroblastoma had the highest level of mRNA expression of mTOR pathway genes, and that BGA002 led to mTOR pathway inhibition followed by autophagy reactivation in MNA-NB cells, which was strengthened by BGA002-RA. BGA002-RA in vivo treatment also eliminated tumor vascularization in a MNA-NB mouse model and significantly increased survival. CONCLUSION Taken together, MYCN modulation mediates the therapeutic efficacy of RA and the development of RA resistance in MNA-NB. Furthermore, by targeting MYCN, a cancer-specific mTOR pathway inhibition occurs only in MNA-NB, thus avoiding the side effects of targeting mTOR in normal cells. These findings warrant clinical testing of BGA002-RA as a strategy for overcoming RA resistance in MNA-NB.
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Affiliation(s)
| | | | - Luca Montemurro
- Pediatric Unit, S. Orsola IRCCS, University of Bologna, Bologna, Italy
| | | | | | | | | | | | | | | | - Francesca Paganelli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
- CNR Institute of Molecular Genetics "Luigi Luca Cavalli-Sforza", Unit of Bologna, Bologna, Italy
| | - Sabrina Valente
- Biotechnology and Methods in Laboratory Medicine, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, Bologna, Italy
| | - Matthias Fischer
- Department of Experimental Pediatric Oncology, University Children's Hospital of Cologne, Medical Faculty, Cologne, Germany; and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
| | | | - Gianandrea Pasquinelli
- Biotechnology and Methods in Laboratory Medicine, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, Bologna, Italy
- Subcellular nephro-vascular diagnostic program, Pathology Unit S. Orsola IRCCS, University of Bologna, Bologna, Italy
| | - Andrea Pession
- Pediatric Unit, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Patrizia Hrelia
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Roberto Tonelli
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy.
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Kanamori Y, Finotti A, Di Magno L, Canettieri G, Tahara T, Timeus F, Greco A, Tirassa P, Gasparello J, Fino P, Di Liegro CM, Proia P, Schiera G, Di Liegro I, Gambari R, Agostinelli E. Enzymatic Spermine Metabolites Induce Apoptosis Associated with Increase of p53, caspase-3 and miR-34a in Both Neuroblastoma Cells, SJNKP and the N-Myc-Amplified Form IMR5. Cells 2021; 10:1950. [PMID: 34440719 PMCID: PMC8393918 DOI: 10.3390/cells10081950] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 07/21/2021] [Accepted: 07/23/2021] [Indexed: 02/07/2023] Open
Abstract
Neuroblastoma (NB) is a common malignant solid tumor in children and accounts for 15% of childhood cancer mortality. Amplification of the N-Myc oncogene is a well-established poor prognostic marker in NB patients and strongly correlates with higher tumor aggression and resistance to treatment. New therapies for patients with N-Myc-amplified NB need to be developed. After treating NB cells with BSAO/SPM, the detection of apoptosis was determined after annexin V-FITC labeling and DNA staining with propidium iodide. The mitochondrial membrane potential activity was checked, labeling cells with the probe JC-1 dye. We analyzed, by real-time RT-PCR, the transcript of genes involved in the apoptotic process, to determine possible down- or upregulation of mRNAs after the treatment on SJNKP and the N-Myc-amplified IMR5 cell lines with BSAO/SPM. The experiments were carried out considering the proapoptotic genes Tp53 and caspase-3. After treatment with BSAO/SPM, both cell lines displayed increased mRNA levels for all these proapoptotic genes. Western blotting analysis with PARP and caspase-3 antibody support that BSAO/SPM treatment induces high levels of apoptosis in cells. The major conclusion is that BSAO/SPM treatment leads to antiproliferative and cytotoxic activity of both NB cell lines, associated with activation of apoptosis.
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Affiliation(s)
- Yuta Kanamori
- Department of Biochemical Sciences “A. Rossi Fanelli”, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy;
| | - Alessia Finotti
- Department of Life Sciences and Biotechnology, Biochemistry and Molecular Biology Section, University of Ferrara, 44121 Ferrara, Italy; (A.F.); (J.G.); (R.G.)
| | - Laura Di Magno
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161 Rome, Italy; (L.D.M.); (G.C.)
| | - Gianluca Canettieri
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161 Rome, Italy; (L.D.M.); (G.C.)
- Istituto Pasteur, Fondazione Cenci-Bolognetti, Sapienza University of Rome, Viale Regina Elena 291, 00161 Rome, Italy
| | - Tomoaki Tahara
- Department of Sensory Organs, Sapienza University of Rome, Policlinico Umberto I, Viale del Policlinico 155, 00161 Rome, Italy; (A.G.); (T.T.)
| | - Fabio Timeus
- Paediatric Onco-haematology, Regina Margherita Children’s Hospital and Paediatric Department, Chivasso Hospital, 10034 Turin, Italy;
| | - Antonio Greco
- Department of Sensory Organs, Sapienza University of Rome, Policlinico Umberto I, Viale del Policlinico 155, 00161 Rome, Italy; (A.G.); (T.T.)
| | - Paola Tirassa
- Institute of Biochemistry and Cell Biology, Research Council of Italy (CNR), 00161 Rome, Italy;
| | - Jessica Gasparello
- Department of Life Sciences and Biotechnology, Biochemistry and Molecular Biology Section, University of Ferrara, 44121 Ferrara, Italy; (A.F.); (J.G.); (R.G.)
| | - Pasquale Fino
- UOC of Dermatology, Policlinico Umberto I Hospital, Sapienza Medical School of Rome, Viale del Policlinico 155, 00161 Rome, Italy;
| | - Carlo Maria Di Liegro
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche) (STEBICEF), University of Palermo, 90128 Palermo, Italy; (C.M.D.L.); (G.S.)
| | - Patrizia Proia
- Department of Psychology, Educational Science and Human Movement (Dipartimento di Scienze Psicologiche, Pedagogiche, dell’Esercizio fisico e della Formazione), University of Palermo, 90128 Palermo, Italy;
| | - Gabriella Schiera
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche) (STEBICEF), University of Palermo, 90128 Palermo, Italy; (C.M.D.L.); (G.S.)
| | - Italia Di Liegro
- Department of Biomedicine, Neurosciences and Advanced Diagnostics, University of Palermo, 90127 Palermo, Italy;
| | - Roberto Gambari
- Department of Life Sciences and Biotechnology, Biochemistry and Molecular Biology Section, University of Ferrara, 44121 Ferrara, Italy; (A.F.); (J.G.); (R.G.)
| | - Enzo Agostinelli
- Department of Sensory Organs, Sapienza University of Rome, Policlinico Umberto I, Viale del Policlinico 155, 00161 Rome, Italy; (A.G.); (T.T.)
- International Polyamines Foundation ‘ETS-ONLUS’ Via del Forte Tiburtino 98, 00159 Rome, Italy
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10
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Liang X, Liu M, Komiyama M. Recognition of Target Site in Various Forms of DNA and RNA by Peptide Nucleic Acid (PNA): From Fundamentals to Practical Applications. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20210086] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Xingguo Liang
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, P. R. China
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266235, P. R. China
| | - Mengqin Liu
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, P. R. China
| | - Makoto Komiyama
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, P. R. China
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11
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Raieli S, Di Renzo D, Lampis S, Amadesi C, Montemurro L, Pession A, Hrelia P, Fischer M, Tonelli R. MYCN Drives a Tumor Immunosuppressive Environment Which Impacts Survival in Neuroblastoma. Front Oncol 2021; 11:625207. [PMID: 33718189 PMCID: PMC7951059 DOI: 10.3389/fonc.2021.625207] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 01/04/2021] [Indexed: 12/12/2022] Open
Abstract
A wide range of malignancies presents MYCN amplification (MNA) or dysregulation. MYCN is associated with poor prognosis and its over-expression leads to several dysregulations including metabolic reprogramming, mitochondria alteration, and cancer stem cell phenotype. Some hints suggest that MYCN overexpression leads to cancer immune-escape. However, this relationship presents various open questions. Our work investigated in details the relationship of MYCN with the immune system, finding a correlated immune-suppressive phenotype in neuroblastoma (NB) and different cancers where MYCN is up-regulated. We found a downregulated Th1-lymphocytes/M1-Macrophages axis and upregulated Th2-lymphocytes/M2-macrophages in MNA NB patients. Moreover, we unveiled a complex immune network orchestrated by N-Myc and we identified 16 genes modules associated to MNA NB. We also identified a MYCN-associated immune signature that has a prognostic value in NB and recapitulates clinical features. Our signature also discriminates patients with poor survival in non-MNA NB patients where MYCN expression is not discriminative. Finally, we showed that targeted inhibition of MYCN by BGA002 (anti-MYCN antigene PNA) is able to restore NK sensibility in MYCN-expressing NB cells. Overall, our study unveils a MYCN-driven immune network in NB and shows a therapeutic option to restore sensibility to immune cells.
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Affiliation(s)
| | - Daniele Di Renzo
- Department of Pharmacy and Biotechnologies, University of Bologna, Bologna, Italy
| | | | | | - Luca Montemurro
- Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Andrea Pession
- Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Patrizia Hrelia
- Department of Pharmacy and Biotechnologies, University of Bologna, Bologna, Italy
| | - Matthias Fischer
- Department of Experimental Pediatric Oncology, Medical Faculty, University Children's Hospital of Cologne, Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
| | - Roberto Tonelli
- Department of Pharmacy and Biotechnologies, University of Bologna, Bologna, Italy
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12
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Abstract
Neuroblastoma (NB) is a pediatric cancer of the sympathetic nervous system and one of the most common solid tumors in infancy. Amplification of MYCN, copy number alterations, numerical and segmental chromosomal aberrations, mutations, and rearrangements on a handful of genes, such as ALK, ATRX, TP53, RAS/MAPK pathway genes, and TERT, are attributed as underlying causes that give rise to NB. However, the heterogeneous nature of the disease-along with the relative paucity of recurrent somatic mutations-reinforces the need to understand the interplay of genetic factors and epigenetic alterations in the context of NB. Epigenetic mechanisms tightly control gene expression, embryogenesis, imprinting, chromosomal stability, and tumorigenesis, thereby playing a pivotal role in physio- and pathological settings. The main epigenetic alterations include aberrant DNA methylation, disrupted patterns of posttranslational histone modifications, alterations in chromatin composition and/or architecture, and aberrant expression of non-coding RNAs. DNA methylation and demethylation are mediated by DNA methyltransferases (DNMTs) and ten-eleven translocation (TET) proteins, respectively, while histone modifications are coordinated by histone acetyltransferases and deacetylases (HATs, HDACs), and histone methyltransferases and demethylases (HMTs, HDMs). This article focuses predominately on the crosstalk between the epigenome and NB, and the implications it has on disease diagnosis and treatment.
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13
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Volpi S, Cancelli U, Neri M, Corradini R. Multifunctional Delivery Systems for Peptide Nucleic Acids. Pharmaceuticals (Basel) 2020; 14:14. [PMID: 33375595 PMCID: PMC7823687 DOI: 10.3390/ph14010014] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/21/2020] [Accepted: 12/23/2020] [Indexed: 02/07/2023] Open
Abstract
The number of applications of peptide nucleic acids (PNAs)-oligonucleotide analogs with a polyamide backbone-is continuously increasing in both in vitro and cellular systems and, parallel to this, delivery systems able to bring PNAs to their targets have been developed. This review is intended to give to the readers an overview on the available carriers for these oligonucleotide mimics, with a particular emphasis on newly developed multi-component- and multifunctional vehicles which boosted PNA research in recent years. The following approaches will be discussed: (a) conjugation with carrier molecules and peptides; (b) liposome formulations; (c) polymer nanoparticles; (d) inorganic porous nanoparticles; (e) carbon based nanocarriers; and (f) self-assembled and supramolecular systems. New therapeutic strategies enabled by the combination of PNA and proper delivery systems are discussed.
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Affiliation(s)
| | | | | | - Roberto Corradini
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, 43124 Parma, Italy; (S.V.); (U.C.); (M.N.)
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14
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Moccia M, Mercurio FA, Langella E, Piacenti V, Leone M, Adamo MFA, Saviano M. Structural Insights on Tiny Peptide Nucleic Acid (PNA) Analogues of miRNA-34a: An in silico and Experimental Integrated Approach. Front Chem 2020; 8:568575. [PMID: 33330358 PMCID: PMC7719796 DOI: 10.3389/fchem.2020.568575] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 11/02/2020] [Indexed: 11/17/2022] Open
Abstract
In the present work, structural features of the interaction between peptide nucleic acid (PNA)-based analogs of the tumor-suppressor microRNA-34a with both its binding sites on MYCN mRNA were investigated. In particular, the region from base 1 to 8 ("seed" region) of miR-34a was reproduced in the form of an 8-mer PNA fragment (tiny PNA), and binding to target 3'UTR MYCN mRNA, was studied by a seldom reported and detailed NMR characterization, providing evidence for the formation of anti-parallel duplexes with a well-organized structural core. The formation of PNA-3'UTR duplexes was also confirmed by Circular Dichroism, and their melting curves were measured by UV spectroscopy. Nevertheless, this study offered a valuable comparison between molecular dynamics predictions and experimental evidence, which showed great correlation. Preliminary uptake assays were carried out in Neuroblastoma Kelly cells, using short peptide conjugates as carriers and FITC fluorescent tag for subcellular localization. Moderate internalization was observed without the use of transfecting agents. The reported results corroborate the interest toward the design and development of chimeric PNA/RNA sequences as effective RNA-targeting agents.
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Affiliation(s)
- Maria Moccia
- Institute of Crystallography, National Research Council, Department of Chemical Sciences and Materials Technologies, Bari, Italy
| | - Flavia Anna Mercurio
- Institute of Biostructures and Bioimaging, National Research Council, Naples, Italy
| | - Emma Langella
- Institute of Biostructures and Bioimaging, National Research Council, Naples, Italy
| | - Valerio Piacenti
- Royal College of Surgeons in Ireland, Department of Pharmaceutical and Medicinal Chemistry, Dublin, Ireland
| | - Marilisa Leone
- Institute of Biostructures and Bioimaging, National Research Council, Naples, Italy
| | - Mauro F. A. Adamo
- Royal College of Surgeons in Ireland, Department of Pharmaceutical and Medicinal Chemistry, Dublin, Ireland
| | - Michele Saviano
- Institute of Crystallography, National Research Council, Department of Chemical Sciences and Materials Technologies, Bari, Italy
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15
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Mehrotra N, Kharbanda S, Singh H. Peptide-based combination nanoformulations for cancer therapy. Nanomedicine (Lond) 2020; 15:2201-2217. [PMID: 32914691 DOI: 10.2217/nnm-2020-0220] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Research in cancer therapy is moving towards the use of biomolecules in combination with conventional approaches for improved disease outcome. Among the biomolecules explored, peptides are strong contenders due to their small size, high specificity, low systemic toxicity and wide inter/intracellular targets. The use of nanoformulations for such combination approaches can lead to further improvement in efficacy by reducing off-target cytotoxicity, increasing circulation time, tumor penetration and accumulation. This review focuses on nanodelivery systems for peptide-based combinations with chemo, immuno, radiation and hormone therapy. It gives an overview of the latest therapeutic research being conducted using combination nanoformulations with anticancer peptides, cell penetrating/tumor targeting peptides, peptide nanocarriers, peptidomimetics, peptide-based hormones and peptide vaccines. The challenges hindering clinical translation are also discussed.
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Affiliation(s)
- Neha Mehrotra
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, 110016, India
| | - Surender Kharbanda
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
| | - Harpal Singh
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, 110016, India
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16
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Calvani M, Subbiani A, Bruno G, Favre C. Beta-Blockers and Berberine: A Possible Dual Approach to Contrast Neuroblastoma Growth and Progression. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:7534693. [PMID: 32855766 PMCID: PMC7443044 DOI: 10.1155/2020/7534693] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 07/22/2020] [Indexed: 12/21/2022]
Abstract
The use of nutraceuticals during cancer treatment is a long-lasting debate. Berberine (BBR) is an isoquinoline quaternary alkaloid extracted from a variety of medicinal plants. BBR has been shown to have therapeutic effects in different pathologies, particularly in cancer, where it affects pathways involved in tumor progression. In neuroblastoma, the most common extracranial childhood solid tumor, BBR, reduces tumor growth by regulating both stemness and differentiation features and by inducing apoptosis. At the same time, the inhibition of β-adrenergic signaling leads to a reduction in growth and increase of differentiation of neuroblastoma. In this review, we summarize the possible beneficial effects of BBR in counteracting tumor growth and progression in various types of cancer and, in particular, in neuroblastoma. However, BBR administration, besides its numerous beneficial effects, presents a few side effects due to inhibition of MAO A enzyme in neuroblastoma cells. Therefore, herein, we proposed a novel therapeutic strategy to overcome side effects of BBR administration consisting of concomitant administration of BBR together with β-blockers in neuroblastoma.
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Affiliation(s)
- Maura Calvani
- Department of Paediatric Haematology-Oncology, A. Meyer University Children's Hospital, Florence, Italy
| | - Angela Subbiani
- Department of Paediatric Haematology-Oncology, A. Meyer University Children's Hospital, Florence, Italy
- Department of Health Sciences, University of Florence, Florence, Italy
| | - Gennaro Bruno
- Department of Paediatric Haematology-Oncology, A. Meyer University Children's Hospital, Florence, Italy
- Department of Health Sciences, University of Florence, Florence, Italy
| | - Claudio Favre
- Department of Paediatric Haematology-Oncology, A. Meyer University Children's Hospital, Florence, Italy
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17
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Zhao Z, Shelton SD, Oviedo A, Baker AL, Bryant CP, Omidvarnia S, Du L. The PLAGL2/MYCN/miR-506-3p interplay regulates neuroblastoma cell fate and associates with neuroblastoma progression. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2020; 39:41. [PMID: 32087738 PMCID: PMC7036248 DOI: 10.1186/s13046-020-1531-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 01/21/2020] [Indexed: 12/17/2022]
Abstract
Background The oncogene MYCN is critical for tumorigenesis of several types of cancers including neuroblastoma. We previously reported that miR-506-3p repressed MYCN expression in neuroblastoma cells. However, the mechanism underlying such regulation was undetermined since there is no miR-506-3p target site in MYCN 3’UTR. Methods By a systematic investigation combining microarray, informatics and luciferase reporter assay, we identified that the transcriptional factor pleiomorphic adenoma gene-like 2 (PLAGL2) is a direct target of miR-506-3p that mediates its regulation on MYCN expression. Using CHIP-PCR and luciferase reporter assay, we validated the transcriptional regulation of MYCN by PLAGL2 and we further demonstrated the transcriptional regulation of PLAGL2 by MYCN. We examined the function of PLAGL2 in regulating neuroblastoma cell fate by cell viability assay, colony formation and Western blotting of differentiation markers. We examined the effect of retinoic acid, the differentiation agent used in neuroblastoma therapy, on miR-506-3p, PLAGL2 and MYCN expressions by quantitative PCR and Western blots. We investigated the clinical relevance of PLAGL2 expression by examining the correlation of tumor PLAGL2 mRNA levels with MYCN mRNA expression and patient survival using public neuroblastoma patient datasets. Results We found that miR-506-3p directly down-regulated PLAGL2 expression, and we validated a PLAGL2 binding site in the MYCN promoter region responsible for promoting MYCN transcription, thereby establishing a mechanism through which miR-506-3p regulates MYCN expression. Conversely, we discovered that MYCN regulated PLAGL2 transcription through five N-Myc-binding E-boxes in the PLAGL2 promoter region. We further confirmed the reciprocal regulation between endogenous PLAGL2 and MYCN in multiple neuroblastoma cell lines. Moreover, we found that PLAGL2 knockdown induced neuroblastoma cell differentiation and reduced cell proliferation, and combined knockdown of PLAGL2 and MYCN showed a synergistic effect. More strikingly, we found that high tumor PLAGL2 mRNA levels were significantly correlated with high MYCN mRNA levels and poor patient survival in neuroblastoma patients. Furthermore, we found that retinoic acid increased expression of miR-506-3p and repressed expression of MYCN and PLAGL2. Conclusions Our findings altogether suggest that the interplay network formed by PLAGL2, MYCN and miR-506-3p is an important mechanism in regulating neuroblastoma cell fate, determining neuroblastoma prognosis, and mediating the therapeutic function of retinoic acid.
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Affiliation(s)
- Zhenze Zhao
- Department of Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA
| | - Spencer D Shelton
- Department of Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA
| | - Alejandro Oviedo
- Department of Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA
| | - Amy L Baker
- Department of Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA
| | - Collin P Bryant
- Department of Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA
| | - Soroush Omidvarnia
- Department of Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA
| | - Liqin Du
- Department of Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA.
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18
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Montemurro L, Raieli S, Angelucci S, Bartolucci D, Amadesi C, Lampis S, Scardovi AL, Venturelli L, Nieddu G, Cerisoli L, Fischer M, Teti G, Falconi M, Pession A, Hrelia P, Tonelli R. A Novel MYCN-Specific Antigene Oligonucleotide Deregulates Mitochondria and Inhibits Tumor Growth in MYCN-Amplified Neuroblastoma. Cancer Res 2019; 79:6166-6177. [PMID: 31615807 DOI: 10.1158/0008-5472.can-19-0008] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 07/10/2019] [Accepted: 10/07/2019] [Indexed: 11/16/2022]
Abstract
Approximately half of high-risk neuroblastoma is characterized by MYCN amplification. N-Myc promotes tumor progression by inducing cell growth and inhibiting differentiation. MYCN has also been shown to play an active role in mitochondrial metabolism, but this relationship is not well understood. Although N-Myc is a known driver of the disease, it remains a target for which no therapeutic drug exists. Here, we evaluated a novel MYCN-specific antigene PNA oligonucleotide (BGA002) in MYCN-amplified (MNA) or MYCN-expressing neuroblastoma and investigated the mechanism of its antitumor activity. MYCN mRNA and cell viability were reduced in a broad set of neuroblastoma cell lines following BGA002 treatment. Furthermore, BGA002 decreased N-Myc protein levels and apoptosis in MNA neuroblastoma. Analysis of gene expression data from patients with neuroblastoma revealed that MYCN was associated with increased reactive oxygen species (ROS), downregulated mitophagy, and poor prognosis. Inhibition of MYCN caused profound mitochondrial damage in MNA neuroblastoma cells through downregulation of the mitochondrial molecular chaperone TRAP1, which subsequently increased ROS. Correspondingly, inhibition of MYCN reactivated mitophagy. Systemic administration of BGA002 downregulated N-Myc and TRAP1, with a concomitant decrease in MNA neuroblastoma xenograft tumor weight. In conclusion, this study highlights the role of N-Myc in blocking mitophagy in neuroblastoma and in conferring protection to ROS in mitochondria through upregulation of TRAP1. BGA002 is a potently improved MYCN-specific antigene oligonucleotide that reverts N-Myc-dysregulated mitochondrial pathways, leading to loss of the protective effect of N-Myc against mitochondrial ROS. SIGNIFICANCE: A second generation antigene peptide oligonucleotide targeting MYCN induces mitochondrial damage and inhibits growth of MYCN-amplified neuroblastoma cells.
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Affiliation(s)
- Luca Montemurro
- Interdepartmental Center for Cancer Research, University of Bologna, Bologna, Italy
| | | | - Silvia Angelucci
- Interdepartmental Center for Cancer Research, University of Bologna, Bologna, Italy
| | - Damiano Bartolucci
- Interdepartmental Center for Cancer Research, University of Bologna, Bologna, Italy
| | | | | | | | | | | | | | - Matthias Fischer
- Department of Experimental Pediatric Oncology, University Children's Hospital of Cologne, Medical Faculty, Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
| | - Gabriella Teti
- Department of Biomedical and Neuromotor Sciences-DBNS, University of Bologna, Bologna, Italy
| | - Mirella Falconi
- Department of Biomedical and Neuromotor Sciences-DBNS, University of Bologna, Bologna, Italy
| | - Andrea Pession
- Interdepartmental Center for Cancer Research, University of Bologna, Bologna, Italy
| | - Patrizia Hrelia
- Department of Pharmacy and Biotechnologies, University of Bologna, Bologna, Italy
| | - Roberto Tonelli
- Department of Pharmacy and Biotechnologies, University of Bologna, Bologna, Italy.
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19
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Piacenti V, Langella E, Autiero I, Nolan JC, Piskareva O, Adamo MFA, Saviano M, Moccia M. A combined experimental and computational study on peptide nucleic acid (PNA) analogues of tumor suppressive miRNA-34a. Bioorg Chem 2019; 91:103165. [PMID: 31419642 DOI: 10.1016/j.bioorg.2019.103165] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 07/19/2019] [Accepted: 07/29/2019] [Indexed: 12/12/2022]
Abstract
MicroRNAs are a ubiquitous class of non-coding RNAs able to regulate gene expression in diverse biological processes. Widespread miRNAs deregulation was reported in numerous diseases including cancer, with several miRNAs playing oncogenic and/or tumor suppressive role by targeting multiple mRNAs simultaneously. Based on these findings, miRNAs have emerged as promising therapeutic tools for cancer treatment. Herein, for the first time, peptide nucleic acids (PNAs) were studied to develop a new class of molecules able to target 3'UTR on MYCN mRNA without a fully complementary base pairing sequence (as miRNAs). For our proof of concept study we have selected as a model the miRNA-34a, which acts as a tumor suppressor in a number of cancers including neuroblastoma. In particular, miRNA-34a is a direct regulator of MYCN oncogene, whose overexpression is a prominent biomarker for the highly aggressive neuroblastoma phenotype. The design and synthesis of three PNA-based oligomers of different length was described, and their interaction with two binding sites on the target MYCN mRNA was investigated by molecular dynamics simulation, and spectroscopic techniques (CD, UV). Intake assay and confocal microscopy of PNA sequences were also carried out in vitro on neuroblastoma Kelly cells. Despite the presence of multiple mismatches, the PNA/RNA hetero duplexes retain very interesting features in terms of stability, affinity as well as of cellular uptake.
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Affiliation(s)
- Valerio Piacenti
- RCSI, Dept. of Pharmaceutical & Medicinal Chemistry, 123 St Stephen's Green, Dublin 2, Ireland
| | - Emma Langella
- National Research Council (CNR)-IBB, via Mezzocannone 16, 80134 Naples, Italy
| | - Ida Autiero
- National Research Council (CNR)-IBB, via Mezzocannone 16, 80134 Naples, Italy
| | - John C Nolan
- RCSI, Dept. of Cancer Genetics, York Street, Dublin 2, Ireland
| | - Olga Piskareva
- RCSI, Dept. of Cancer Genetics, York Street, Dublin 2, Ireland
| | - Mauro F A Adamo
- RCSI, Dept. of Pharmaceutical & Medicinal Chemistry, 123 St Stephen's Green, Dublin 2, Ireland
| | - Michele Saviano
- National Research Council (CNR)-IC, via G. Amendola 122/O, 70126 Bari, Italy
| | - Maria Moccia
- National Research Council (CNR)-IC, via G. Amendola 122/O, 70126 Bari, Italy.
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20
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Ghaffari E, Rezatofighi SE, Ardakani MR, Rastegarzadeh S. Delivery of antisense peptide nucleic acid by gold nanoparticles for the inhibition of virus replication. Nanomedicine (Lond) 2019; 14:1827-1840. [PMID: 31274375 DOI: 10.2217/nnm-2018-0520] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: We aim to use peptide nucleic acid (PNA) for antisense therapy against bovine viral diarrhea virus (BVDV), a surrogate model of human hepatitis C virus, and introduce an optimal approach for delivering PNA into the cell. Materials & methods: PNA was designed for hybridization to the 5'-untranslated region of BVDV RNA in order to form a heteroduplex structure and inhibit the translation and replication of virus. Gold nanoparticles (AuNPs) were used as a delivery system for PNA. Results: The cellular uptake of PNA-AuNPs and inhibition of BVDV infection in the middle stage of viral replication were found. Conclusion: Further research is warranted to develop AuNPs as a potential vehicle for delivering PNA in order to remove viruses from the infected cells.
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Affiliation(s)
- Elnaz Ghaffari
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Seyedeh Elham Rezatofighi
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran.,Biotechnology & Biological Science Research Center, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Mohammad Roayaei Ardakani
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran.,Biotechnology & Biological Science Research Center, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Saadat Rastegarzadeh
- Department of Chemistry, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
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21
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Montazersaheb S, Hejazi MS, Nozad Charoudeh H. Potential of Peptide Nucleic Acids in Future Therapeutic Applications. Adv Pharm Bull 2018; 8:551-563. [PMID: 30607328 PMCID: PMC6311635 DOI: 10.15171/apb.2018.064] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 08/28/2018] [Accepted: 09/04/2018] [Indexed: 12/11/2022] Open
Abstract
Peptide nucleic acids (PNA) are synthetic analog of DNA with a repeating N-(2-aminoethyl)-glycine peptide backbone connected to purine and pyrimidine nucleobases via a linker. Considering the unique properties of PNA, including resistance to enzymatic digestion, higher biostability combined with great hybridization affinity toward DNA and RNA, it has attracted great attention toward PNA- based technology as a promising approach for gene alteration. However, an important challenge in utilizing PNA is poor intracellular uptake. Therefore, some strategies have been developed to enhance the delivery of PNA in order to reach cognate site. Although PNAs primarily demonstrated to act as an antisense and antigene agents for inhibition of transcription and translation of target genes, more therapeutic applications such as splicing modulation and gene editing are also used to produce specific genome modifications. Hence, several approaches based on PNAs technology have been designed for these purposes. This review briefly presents the properties and characteristics of PNA as well as different gene modulation mechanisms. Thereafter, current status of successful therapeutic applications of PNA as gene therapeutic intervention in different research areas with special interest in medical application in particular, anti-cancer therapy are discussed. Then it focuses on possible use of PNA as anti-mir agent and PNA-based strategies against clinically important bacteria.
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Affiliation(s)
- Soheila Montazersaheb
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Saeid Hejazi
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
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22
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Atluri R, Atmaramani R, Tharaka G, McCallister T, Peng J, Diercks D, GhoshMitra S, Ghosh S. Photo-Magnetic Irradiation-Mediated Multimodal Therapy of Neuroblastoma Cells Using a Cluster of Multifunctional Nanostructures. NANOMATERIALS 2018; 8:nano8100774. [PMID: 30274306 PMCID: PMC6215308 DOI: 10.3390/nano8100774] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 08/13/2018] [Accepted: 08/25/2018] [Indexed: 02/07/2023]
Abstract
The use of high intensity chemo-radiotherapies has demonstrated only modest improvement in the treatment of high-risk neuroblastomas. Moreover, undesirable drug specific and radiation therapy-incurred side effects enhance the risk of developing into a second cancer at a later stage. In this study, a safer and alternative multimodal therapeutic strategy involving simultaneous optical and oscillating (AC, Alternating Current) magnetic field stimulation of a multifunctional nanocarrier system has successfully been implemented to guide neuroblastoma cell destruction. This novel technique permitted the use of low-intensity photo-magnetic irradiation and reduced the required nanoparticle dose level. The combination of released cisplatin from the nanodrug reservoirs and photo-magnetic coupled hyperthermia mediated cytotoxicity led to the complete ablation of the B35 neuroblastoma cells in culture. Our study suggests that smart nanostructure-based photo-magnetic hybrid irradiation is a viable approach to remotely guide neuroblastoma cell destruction, which may be adopted in clinical management post modification to treat aggressive cancers.
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Affiliation(s)
- Rohini Atluri
- Nano-Bio Engineering Laboratory, Southeast Missouri State University, Cape Girardeau, MO 63701, USA.
- Mechanical and Energy Engineering Department, University of North Texas, Denton, TX 76207, USA.
| | - Rahul Atmaramani
- Nano-Bio Engineering Laboratory, Southeast Missouri State University, Cape Girardeau, MO 63701, USA.
- Department of Bioengineering, The University of Texas at Dallas, Richardson, TX 75080, USA.
| | - Gamage Tharaka
- Department of Physics and Engineering Physics, Southeast Missouri State University, Cape Girardeau, MO 63701, USA.
| | - Thomas McCallister
- Nano-Bio Engineering Laboratory, Southeast Missouri State University, Cape Girardeau, MO 63701, USA.
| | - Jian Peng
- Department of Physics and Engineering Physics, Southeast Missouri State University, Cape Girardeau, MO 63701, USA.
| | - David Diercks
- Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO 80439, USA.
| | - Somesree GhoshMitra
- Nano-Bio Engineering Laboratory, Southeast Missouri State University, Cape Girardeau, MO 63701, USA.
| | - Santaneel Ghosh
- Nano-Bio Engineering Laboratory, Southeast Missouri State University, Cape Girardeau, MO 63701, USA.
- Department of Physics and Engineering Physics, Southeast Missouri State University, Cape Girardeau, MO 63701, USA.
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23
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Zeid R, Lawlor MA, Poon E, Reyes JM, Fulciniti M, Lopez MA, Scott TG, Nabet B, Erb MA, Winter GE, Jacobson Z, Polaski DR, Karlin KL, Hirsch RA, Munshi NP, Westbrook TF, Chesler L, Lin CY, Bradner JE. Enhancer invasion shapes MYCN-dependent transcriptional amplification in neuroblastoma. Nat Genet 2018; 50:515-523. [PMID: 29379199 PMCID: PMC6310397 DOI: 10.1038/s41588-018-0044-9] [Citation(s) in RCA: 133] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 12/18/2017] [Indexed: 11/08/2022]
Abstract
Amplification of the locus encoding the oncogenic transcription factor MYCN is a defining feature of high-risk neuroblastoma. Here we present the first dynamic chromatin and transcriptional landscape of MYCN perturbation in neuroblastoma. At oncogenic levels, MYCN associates with E-box binding motifs in an affinity-dependent manner, binding to strong canonical E-boxes at promoters and invading abundant weaker non-canonical E-boxes clustered at enhancers. Loss of MYCN leads to a global reduction in transcription, which is most pronounced at MYCN target genes with the greatest enhancer occupancy. These highly occupied MYCN target genes show tissue-specific expression and are linked to poor patient survival. The activity of genes with MYCN-occupied enhancers is dependent on the tissue-specific transcription factor TWIST1, which co-occupies enhancers with MYCN and is required for MYCN-dependent proliferation. These data implicate tissue-specific enhancers in defining often highly tumor-specific 'MYC target gene signatures' and identify disruption of the MYCN enhancer regulatory axis as a promising therapeutic strategy in neuroblastoma.
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Affiliation(s)
- Rhamy Zeid
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Matthew A Lawlor
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Evon Poon
- Division of Clinical Studies, The Institute of Cancer Research, London, UK
- Division of Cancer Therapeutics, The Institute of Cancer Research, London, UK
| | - Jaime M Reyes
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Mariateresa Fulciniti
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- LeBow Institute for Myeloma Therapeutics and Jerome Lipper Multiple Myeloma Center, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Michael A Lopez
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- LeBow Institute for Myeloma Therapeutics and Jerome Lipper Multiple Myeloma Center, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Thomas G Scott
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Behnam Nabet
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Michael A Erb
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Georg E Winter
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Zoe Jacobson
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Donald R Polaski
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Kristen L Karlin
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Rachel A Hirsch
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Nikhil P Munshi
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- LeBow Institute for Myeloma Therapeutics and Jerome Lipper Multiple Myeloma Center, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Thomas F Westbrook
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Louis Chesler
- Division of Clinical Studies, The Institute of Cancer Research, London, UK
- Division of Cancer Therapeutics, The Institute of Cancer Research, London, UK
| | - Charles Y Lin
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA.
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
| | - James E Bradner
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA.
- Department of Medicine, Harvard Medical School, Boston, MA, USA.
- Novartis Institute for Biomedical Research, Cambridge, MA, USA.
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24
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Elskens J, Manicardi A, Costi V, Madder A, Corradini R. Synthesis and Improved Cross-Linking Properties of C5-Modified Furan Bearing PNAs. Molecules 2017; 22:molecules22112010. [PMID: 29156637 PMCID: PMC6150320 DOI: 10.3390/molecules22112010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Revised: 11/07/2017] [Accepted: 11/09/2017] [Indexed: 12/21/2022] Open
Abstract
Over the past decades, peptide nucleic acid/DNA (PNA:DNA) duplex stability has been improved via backbone modification, often achieved via introducing an amino acid side chain at the α- or γ-position in the PNA sequence. It was previously shown that interstrand cross-linking can further enhance the binding event. In this work, we combined both strategies to fine-tune PNA crosslinking towards single stranded DNA sequences using a furan oxidation-based crosslinking method; for this purpose, γ-l-lysine and γ-l-arginine furan-PNA monomers were synthesized and incorporated in PNA sequences via solid phase synthesis. It was shown that the l-lysine γ-modification had a beneficial effect on crosslink efficiency due to pre-organization of the PNA helix and a favorable electrostatic interaction between the positively-charged lysine and the negatively-charged DNA backbone. Moreover, the crosslink yield could be optimized by carefully choosing the type of furan PNA monomer. This work is the first to describe a selective and biocompatible furan crosslinking strategy for crosslinking of γ-modified PNA sequences towards single-stranded DNA.
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Affiliation(s)
- Joke Elskens
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, 9000 Gent, Belgium.
| | - Alex Manicardi
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, 9000 Gent, Belgium.
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy.
| | - Valentina Costi
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy.
| | - Annemieke Madder
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, 9000 Gent, Belgium.
| | - Roberto Corradini
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy.
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25
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Obstruction of BRAF V600E transcription by complementary PNA oligomers as a means to inhibit BRAF-mutant melanoma growth. Cancer Gene Ther 2017; 24:401-408. [PMID: 28937091 DOI: 10.1038/cgt.2017.34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Accepted: 08/05/2017] [Indexed: 11/08/2022]
Abstract
Peptide nucleic acid (PNA) oligomers are DNA mimics, which are capable of binding gene sequences 1000-fold more avidly than complementary native DNA by strand invasion and effectively obstruct transcription. Irreversibly obstructing the transcription or replication of a gene sequence, such as BRAFV600E, offers a potential route to specifically target the cancer cell itself. We have employed PNA oligomers to target BRAFV600E in a sequence-specific complementary manner. These PNAs have been modified by appending configurationally stabilizing cationic peptides in order to improve their cellular delivery and target avidity. Our results indicate that exposure of the melanoma cell lines to a modified PNA-peptide conjugate complementary to BRAFV600E mutation sequence results in a concentration-dependent and time-dependent inhibition of cell growth that is specific for the BRAFV600E-mutant melanoma cell lines with inhibition of mRNA and protein expression. Xenograft mouse trials show increased tumor growth delay and necrosis with the BRAFV600E-complementary PNA-peptide conjugates as compared with the saline and scrambled PNA sequence controls. Similarly, quantitative measurement shows a 2.5-fold decrease in Ki67 and a 3-fold increase in terminal deoxynucleotidyl transferase dUTP nick end labeling expression with this approach. PNA-delivery peptide conjugates represent a novel way to target BRAFV600E and represent a new approach in targeting selective oncogenes that induce tumor growth.
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26
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Ringhieri P, Avitabile C, Saviano M, Morelli G, Romanelli A, Accardo A. The influence of liposomal formulation on the incorporation and retention of PNA oligomers. Colloids Surf B Biointerfaces 2016; 145:462-469. [PMID: 27236097 DOI: 10.1016/j.colsurfb.2016.05.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 05/04/2016] [Accepted: 05/11/2016] [Indexed: 11/28/2022]
Abstract
Liposomal formulations composed of phospholipids with different unsaturation degrees, head groups and at different cholesterol content have been tested for the encapsulation of Peptide Nucleic Acid (PNA) oligomers. The best loading capability (177μg, ER%=87.2) was obtained for pure liposomes of phosphatidylglycerol (DOPG) with negatively charged head group. The insertion of a 10-20% of cholesterol in DOPG based liposomes provides a slight decrease (∼160μg) of the PNA loading. On the other hand, the cholesterol addition (20-30%) slows down the PNA's release (∼27%) in fetal bovine serum from the liposomal formulation. Based on the encapsulation and the release properties, PEGylated DOPG liposomes with a percentage of cholesterol of 10-20% are the optimal formulation for the loading of PNA-a210.
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Affiliation(s)
- Paola Ringhieri
- Department of Pharmacy, University of Naples "Federico II", via Mezzocannone 16, 80134 Napoli, Italy; Interuniversity Research Centre on Bioactive Peptides (CIRPeB), via Mezzocannone 16, 80134 Napoli, Italy
| | - Concetta Avitabile
- Institute of Biostructure and Bioimaging (IBB), CNR, via Mezzocannone 16, 80134 Napoli, Italy
| | - Michele Saviano
- Institute of Crystallography (IC), CNR, Via Amendola 122, 70126 Bari, Italy
| | - Giancarlo Morelli
- Department of Pharmacy, University of Naples "Federico II", via Mezzocannone 16, 80134 Napoli, Italy; Interuniversity Research Centre on Bioactive Peptides (CIRPeB), via Mezzocannone 16, 80134 Napoli, Italy
| | - Alessandra Romanelli
- Department of Pharmacy, University of Naples "Federico II", via Mezzocannone 16, 80134 Napoli, Italy; Interuniversity Research Centre on Bioactive Peptides (CIRPeB), via Mezzocannone 16, 80134 Napoli, Italy.
| | - Antonella Accardo
- Department of Pharmacy, University of Naples "Federico II", via Mezzocannone 16, 80134 Napoli, Italy; Interuniversity Research Centre on Bioactive Peptides (CIRPeB), via Mezzocannone 16, 80134 Napoli, Italy.
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27
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Stafman LL, Beierle EA. Cell Proliferation in Neuroblastoma. Cancers (Basel) 2016; 8:E13. [PMID: 26771642 PMCID: PMC4728460 DOI: 10.3390/cancers8010013] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 01/05/2016] [Accepted: 01/08/2016] [Indexed: 12/19/2022] Open
Abstract
Neuroblastoma, the most common extracranial solid tumor of childhood, continues to carry a dismal prognosis for children diagnosed with advanced stage or relapsed disease. This review focuses upon factors responsible for cell proliferation in neuroblastoma including transcription factors, kinases, and regulators of the cell cycle. Novel therapeutic strategies directed toward these targets in neuroblastoma are discussed.
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Affiliation(s)
- Laura L Stafman
- Department of Surgery, Division of Pediatric Surgery, University of Alabama, Birmingham, AL 35233, USA.
| | - Elizabeth A Beierle
- Department of Surgery, Division of Pediatric Surgery, University of Alabama, Birmingham, AL 35233, USA.
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28
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Aiba Y, Ohyama J, Komiyama M. Transfection of PNA–NLS Conjugates into Human Cells Using Partially Complementary Oligonucleotides. CHEM LETT 2015. [DOI: 10.1246/cl.150733] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuichiro Aiba
- Life Science Center of Tsukuba Advanced Research Alliance, University of Tsukuba
- Research Center for Advanced Science and Technology, The University of Tokyo
| | - Junpei Ohyama
- Research Center for Advanced Science and Technology, The University of Tokyo
| | - Makoto Komiyama
- Life Science Center of Tsukuba Advanced Research Alliance, University of Tsukuba
- Research Center for Advanced Science and Technology, The University of Tokyo
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29
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Aiba Y, Honda Y, Komiyama M. Promotion of double-duplex invasion of peptide nucleic acids through conjugation with nuclear localization signal peptide. Chemistry 2015; 21:4021-6. [PMID: 25640012 DOI: 10.1002/chem.201406085] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Indexed: 11/10/2022]
Abstract
Pseudo-complementary peptide nucleic acid (pcPNA), as one of the most widely used synthetic DNA analogues, invades double-stranded DNA according to Watson-Crick rules to form invasion complexes. This unique mode of DNA recognition induces structural changes at the invasion site and can be used for a range of applications. In this paper, pcPNA is conjugated with a nuclear localization signal (NLS) peptide, and its invading activity is notably promoted both thermodynamically and kinetically. Thus, the double-duplex invasion complex is formed promptly at low pcPNA concentrations under high salt conditions, where the invasion otherwise never occurs. Furthermore, NLS-modified pcPNA is successfully employed for site-selective DNA scission, and the targeted DNA is selectively cleaved under conditions that are not conducive for DNA cutters using unmodified pcPNAs. This strategy of pcPNA modification is expected to be advantageous and promising for a range of in vitro and in vivo applications.
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Affiliation(s)
- Yuichiro Aiba
- Life Science Center of Tsukuba Advanced Research Alliance, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8577 (Japan); Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8904 (Japan); Present address: Department of Pharmacology, University of Texas Southwestern Medical Center, 6001 Forest Park Road, Dallas, TX 75390-9041 (USA)
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30
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Komiyama M. Chemical modifications of artificial restriction DNA cutter (ARCUT) to promote its in vivo and in vitro applications. ARTIFICIAL DNA, PNA & XNA 2014; 5:e1112457. [PMID: 26744220 PMCID: PMC5329899 DOI: 10.1080/1949095x.2015.1112457] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 10/14/2015] [Accepted: 10/15/2015] [Indexed: 05/10/2023]
Abstract
Recently, completely chemistry-based tools for site-selective scission of DNA (ARCUT) have been prepared by combining 2 strands of pseudo-complementary PNA (pcPNA: site-selective activator) and a Ce(IV)-EDTA complex (molecular scissors). Its site-specificity is sufficient to cut the whole human genome at one predetermined site. In this first-generation ARCUT, however, there still remain several problems to be solved for wider applications. This review presents recent approaches to solve these problems. They are divided into (i) covalent modification of pcPNA with other functional groups and (ii) new strategies using conventional PNA, in place of pcPNA, as site-selective activator. Among various chemical modifications, conjugation with positively-charged nuclear localization signal peptide is especially effective. Furthermore, unimolecular activators, a single strand of which successfully activates the target site in DNA for site-selective scission, have been also developed. As the result of these modifications, the site-selective scission by Ce(IV)-EDTA was achieved promptly even under high salt conditions which are otherwise unfavourable for double-duplex invasion. Furthermore, it has been shown that "molecular crowding effect," which characterizes the inside of living cells, enormously promotes the invasion, and thus the invasion seems to proceed effectively and spontaneously in the cells. Strong potential of pcPNA for further applications in vivo and in vitro has been confirmed.
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Affiliation(s)
- Makoto Komiyama
- Life Science Center of Tsukuba Advanced Research Alliance; University of Tsukuba; Tsukuba, Ibaraki, Japan
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31
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Totsingan F, Marchelli R, Corradini R. Molecular computing by PNA:PNA duplex formation. ARTIFICIAL DNA, PNA & XNA 2014; 2:16-22. [PMID: 21686248 DOI: 10.4161/adna.2.1.15459] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 03/09/2011] [Accepted: 03/14/2011] [Indexed: 11/19/2022]
Abstract
Molecular computing is potentially one of the most powerful tools for the development of massive parallel computing protocols. In the present paper, a first example of the use of PNA:PNA interactions in molecular computing is described. A series of short PNA sequences have been designed with a four base stretch coding for variables and solutions. Hybridization of the components in different combinations was tested both in solution and in a microarray format. A series of PNA representing the solutions were spotted on a microarray surface in order to simulate the hardware. A series of PNA representing the variables, labeled with TAMRA, were used to interrogate the device enabling to solve non-deterministic logic operations. The system was shown to be able to solve a two-variable equation with a high signal to noise ratio. This paper intends to provide a proof of principle that PNA, on account of their stability and specificity of binding, are most suitable for constructing organic-type computers.
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32
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Lupino E, Ramondetti C, Buccinnà B, Piccinini M. Exposure of neuroblastoma cell lines to imatinib results in the upregulation of the CDK inhibitor p27(KIP1) as a consequence of c-Abl inhibition. Biochem Pharmacol 2014; 92:235-50. [PMID: 25264277 DOI: 10.1016/j.bcp.2014.09.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 09/19/2014] [Accepted: 09/19/2014] [Indexed: 10/24/2022]
Abstract
Imatinib mesylate is a tyrosine kinase inhibitor with selectivity for abelson tyrosine-protein kinase 1 (c-Abl), breakpoint cluster region (Bcr)-Abl fusion protein (Bcr-Abl), mast/stem cell growth factor receptor Kit (c-Kit), and platelet-derived growth factor receptor (PDGFR). Previous studies demonstrated that imatinib in the low micromolar range exerted antiproliferative effects on neuroblastoma cell lines. However, although neuroblastoma cells express c-Kit and PDGFR, the imatinib concentrations required to achieve significant growth inhibitory effects (≥ 10 μM) are substantially higher than those required for inhibition of ligand-induced phosphorylation of wild type c-Kit and PDGFR (≤ 1 μM), suggesting that additional mechanisms are responsible for the antitumor activity of imatinib on these cells. In this study, we show that treatment of neuroblastoma cell lines with 1-15 μM imatinib resulted in a dose dependent inhibition of 5-bromo-2'-deoxyuridine (BrdU) incorporation into newly synthesized DNA. The antiproliferative effect of imatinib was dependent on the upregulation of the cyclin-dependent kinase (CDK) inhibitor p27(KIP1) in the nuclear compartment as a result of increased p27(KIP1) protein stability. We demonstrate that the mechanism of p27(KIP1) stabilization relied on inhibition of p27(KIP1) phosphorylation on tyrosine residues by c-Abl. We provide evidence that in neuroblastoma cell lines a significant fraction of cellular c-Abl is phosphorylated on Tyr-245, consistent with an open and active conformation. Notably, exposure to imatinib did not affect Tyr-245 phosphorylation. Given the low affinity of active c-Abl for imatinib, these data provide a molecular explanation for the relatively high imatinib concentrations required to inhibit neuroblastoma cell proliferation.
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Affiliation(s)
- Elisa Lupino
- Department of Oncology, School of Medicine, University of Torino, Italy
| | | | - Barbara Buccinnà
- Department of Oncology, School of Medicine, University of Torino, Italy
| | - Marco Piccinini
- Department of Oncology, School of Medicine, University of Torino, Italy.
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33
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Figueiredo CR, Matsuo AL, Massaoka MH, Polonelli L, Travassos LR. Anti-tumor activities of peptides corresponding to conserved complementary determining regions from different immunoglobulins. Peptides 2014; 59:14-9. [PMID: 24972300 DOI: 10.1016/j.peptides.2014.06.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 06/11/2014] [Accepted: 06/12/2014] [Indexed: 11/22/2022]
Abstract
Short synthetic peptides corresponding to sequences of complementarity-determining regions (CDRs) from different immunoglobulin families have been shown to induce antimicrobial, antiviral and antitumor activities regardless of the specificity of the original monoclonal antibody (mAb). Presently, we studied the in vitro and in vivo antitumor activity of synthetic peptides derived from conserved CDR sequences of different immunoglobulins against human tumor cell lines and murine B16F10-Nex2 melanoma aiming at the discovery of candidate molecules for cancer therapy. Four light- and heavy-chain CDR peptide sequences from different antibodies (C36-L1, HA9-H2, 1-H2 and Mg16-H2) showed cytotoxic activity against murine melanoma and a panel of human tumor cell lineages in vitro. Importantly, they also exerted anti-metastatic activity using a syngeneic melanoma model in mice. Other peptides (D07-H3, MN20v1, MS2-H3) were also protective against metastatic melanoma, without showing significant cytotoxicity against tumor cells in vitro. In this case, we suggest that these peptides may act as immune adjuvants in vivo. As observed, peptides induced nitric oxide production in bone-marrow macrophages showing that innate immune cells can also be modulated by these CDR peptides. The present screening supports the search in immunoglobulins of rather frequent CDR sequences that are endowed with specific antitumor properties and may be candidates to be developed as anti-cancer drugs.
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Affiliation(s)
- Carlos R Figueiredo
- Experimental Oncology Unit (UNONEX), Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, SP, Brazil
| | - Alisson L Matsuo
- Experimental Oncology Unit (UNONEX), Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, SP, Brazil
| | - Mariana H Massaoka
- Experimental Oncology Unit (UNONEX), Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, SP, Brazil
| | - Luciano Polonelli
- Microbiology and Virology Unit, Department of Biomedical, Biotechnological and Translational Sciences, Universitá degli Studi di Parma, Parma 43121, Italy
| | - Luiz R Travassos
- Experimental Oncology Unit (UNONEX), Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, SP, Brazil; Recepta Biopharma, São Paulo, SP, Brazil.
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34
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Brognara E, Fabbri E, Bianchi N, Finotti A, Corradini R, Gambari R. Molecular methods for validation of the biological activity of peptide nucleic acids targeting microRNAs. Methods Mol Biol 2014; 1095:165-76. [PMID: 24166312 DOI: 10.1007/978-1-62703-703-7_14] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The involvement of microRNAs in human pathologies is a firmly established fact. Accordingly, the pharmacological modulation of their activity appears to be a very appealing issue in the development of new types of drugs (miRNA therapeutics). One of the most interesting issues is the possible development of miRNA therapeutics for development of anti-cancer molecules. In this respect appealing molecules are based on peptide nucleic acids (PNAs), displaying a pseudo-peptide backbone composed of N-(2-aminoethyl)glycine units and found to be excellent candidates for antisense and antigene therapies. The major limit in the use of PNAs for alteration of gene expression is the low uptake by eukaryotic cells. The aim of this chapter is to describe methods for determining the activity of PNAs designed to target oncomiRNAs, using as model system miR-221 and its target p27(Kip1) mRNA. The effects of PNAs targeting miR-221 are here presented discussing data obtained using as model system the human breast cancer cell line MDA-MB-231, in which miR-221 is up-regulated and p27(Kip1) down-regulated.
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Affiliation(s)
- Eleonora Brognara
- Department of Life Sciences and Biotechnology, Ferrara University, Ferrara, Italy
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35
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Aiba Y, Hamano Y, Kameshima W, Araki Y, Wada T, Accetta A, Sforza S, Corradini R, Marchelli R, Komiyama M. PNA-NLS conjugates as single-molecular activators of target sites in double-stranded DNA for site-selective scission. Org Biomol Chem 2014; 11:5233-8. [PMID: 23820872 DOI: 10.1039/c3ob40947c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Artificial DNA cutters have been developed by us in our previous studies by combining two strands of pseudo-complementary peptide nucleic acid (pcPNA) with Ce(IV)-EDTA-promoted hydrolysis. The pcPNAs have two modified nucleobases (2,6-diaminopurine and 2-thiouracil) instead of conventional A and T, and can invade double-stranded DNA to activate the target site for the scission. This system has been applied to site-selective scissions of plasmid, λ-phage, E. coli genomic DNA, and human genomic DNA. Here, we have reported a still simpler and more convenient DNA cutter obtained by conjugating peptide nucleic acid (PNA) with a nuclear localization signal (NLS) peptide. This new DNA cutter requires only one PNA strand (instead of two) bearing conventional (non-pseudo-complementary) nucleobases. This PNA-NLS conjugate effectively activated the target site in double-stranded DNA and induced site-selective scission by Ce(IV)-EDTA. The complex formation between the conjugate and DNA was concretely evidenced by spectroscopic results based on time-resolved fluorescence. The target scission site of this new system was straightforwardly determined by the Watson-Crick base pairing rule, and mismatched sequences were clearly discriminated. Importantly, even highly GC-rich regions, which are difficult to be targeted by a previous strategy using pcPNA, were successfully targeted. All these features of the present DNA cutter make it promising for various future applications.
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Affiliation(s)
- Yuichiro Aiba
- Life Science Center of Tsukuba Advanced Research Alliance, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8577, Japan
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36
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Astolfi A, Vendemini F, Urbini M, Melchionda F, Masetti R, Franzoni M, Libri V, Serravalle S, Togni M, Paone G, Montemurro L, Bressanin D, Chiarini F, Martelli AM, Tonelli R, Pession A. MYCN is a novel oncogenic target in pediatric T-cell acute lymphoblastic leukemia. Oncotarget 2014; 5:120-30. [PMID: 24334727 PMCID: PMC3960194 DOI: 10.18632/oncotarget.1337] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 09/27/2013] [Indexed: 12/30/2022] Open
Abstract
MYCN is an oncogene frequently overexpressed in pediatric solid tumors whereas few evidences suggest his involvement in the pathogenesis of haematologic malignancies. Here we show that MYCN is overexpressed in a relevant proportion (40 to 50%) of adult and pediatric T-cell acute lymphoblastic leukemias (T-ALL). Focusing on pediatric T-ALL, MYCN-expressing samples were found almost exclusively in the TAL1-positive subgroup. Moreover, TAL1 knockdown in T-ALL cell lines resulted in a reduction of MYCN expression, and TAL1 directly binds to MYCN promoter region, suggesting that TAL1 pathway activation could sustain the up-regulation of MYCN. The role of MYCN in T-ALL was investigated by peptide nucleic acid (PNA-MYCN)-mediated transcriptional silencing of MYCN and by siRNAs. MYCN knockdown in T-ALL cell lines resulted in a reduction of cell viability, up to 50%, while no effect was elicited with a mismatch PNA. The inhibitory effect of PNA-MYCN on cell viability was due to a significant increase in apoptosis. PNA-MYCN treatment in pediatric T-ALL samples reduced cell viability of leukemic cells from patients with high MYCN expression, while no effect was obtained in MYCN-negative blast cells. These results showed that MYCN is frequently overexpressed in pediatric T-ALL and suggested his role as a candidate for molecularly-directed therapies.
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Affiliation(s)
- Annalisa Astolfi
- “Giorgio Prodi” Cancer Research Center, University of Bologna, Bologna, Italy
- Pediatric Oncology and Hematology Unit “Lalla Seràgnoli”, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Francesca Vendemini
- Pediatric Oncology and Hematology Unit “Lalla Seràgnoli”, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Milena Urbini
- “Giorgio Prodi” Cancer Research Center, University of Bologna, Bologna, Italy
- Pediatric Oncology and Hematology Unit “Lalla Seràgnoli”, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Fraia Melchionda
- Pediatric Oncology and Hematology Unit “Lalla Seràgnoli”, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Riccardo Masetti
- Pediatric Oncology and Hematology Unit “Lalla Seràgnoli”, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Monica Franzoni
- Pediatric Oncology and Hematology Unit “Lalla Seràgnoli”, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Virginia Libri
- Pediatric Oncology and Hematology Unit “Lalla Seràgnoli”, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Salvatore Serravalle
- Pediatric Oncology and Hematology Unit “Lalla Seràgnoli”, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Marco Togni
- Pediatric Oncology and Hematology Unit “Lalla Seràgnoli”, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Giuseppina Paone
- Pediatric Oncology and Hematology Unit “Lalla Seràgnoli”, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Luca Montemurro
- Pediatric Oncology and Hematology Unit “Lalla Seràgnoli”, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Daniela Bressanin
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Francesca Chiarini
- Institute of Molecular Genetics, National Research Council-IOR, Bologna, Italy
| | - Alberto M. Martelli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Roberto Tonelli
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Andrea Pession
- “Giorgio Prodi” Cancer Research Center, University of Bologna, Bologna, Italy
- Pediatric Oncology and Hematology Unit “Lalla Seràgnoli”, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
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37
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Morais M, Paulo A, Gano L, Santos I, Correia JD. Target-specific Tc(CO)3-complexes for in vivo imaging. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.05.050] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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38
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Synthesis and in vitro evaluation of a PDT active BODIPY–NLS conjugate. Bioorg Med Chem Lett 2013; 23:3204-7. [DOI: 10.1016/j.bmcl.2013.03.128] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 03/27/2013] [Accepted: 03/30/2013] [Indexed: 11/23/2022]
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39
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Megison ML, Gillory LA, Beierle EA. Cell survival signaling in neuroblastoma. Anticancer Agents Med Chem 2013; 13:563-75. [PMID: 22934706 PMCID: PMC3710698 DOI: 10.2174/1871520611313040005] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 05/02/2012] [Accepted: 05/04/2012] [Indexed: 01/09/2023]
Abstract
Neuroblastoma is the most common extracranial solid tumor of childhood and is responsible for over 15% of pediatric cancer deaths. Neuroblastoma tumorigenesis and malignant transformation is driven by overexpression and dominance of cell survival pathways and a lack of normal cellular senescence or apoptosis. Therefore, manipulation of cell survival pathways may decrease the malignant potential of these tumors and provide avenues for the development of novel therapeutics. This review focuses on several facets of cell survival pathways including protein kinases (PI3K, AKT, ALK, and FAK), transcription factors (NF-κB, MYCN and p53), and growth factors (IGF, EGF, PDGF, and VEGF). Modulation of each of these factors decreases the growth or otherwise hinders the malignant potential of neuroblastoma, and many therapeutics targeting these pathways are already in the clinical trial phase of development. Continued research and discovery of effective modulators of these pathways will revolutionize the treatment of neuroblastoma.
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40
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Sugiyama T, Kittaka A. Chiral peptide nucleic acids with a substituent in the N-(2-aminoethy)glycine backbone. Molecules 2012; 18:287-310. [PMID: 23271467 PMCID: PMC6269907 DOI: 10.3390/molecules18010287] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Revised: 12/19/2012] [Accepted: 12/19/2012] [Indexed: 11/16/2022] Open
Abstract
A peptide nucleic acid (PNA) is a synthetic nucleic acid mimic in which the sugar-phosphate backbone is replaced by a peptide backbone. PNAs hybridize to complementary DNA and RNA with higher affinity and superior sequence selectivity compared to DNA. PNAs are resistant to nucleases and proteases and have a low affinity for proteins. These properties make PNAs an attractive agent for biological and medical applications. To improve the antisense and antigene properties of PNAs, many backbone modifications of PNAs have been explored under the concept of preorganization. This review focuses on chiral PNAs bearing a substituent in the N-(2-aminoethyl)glycine backbone. Syntheses, properties, and applications of chiral PNAs are described.
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Affiliation(s)
- Toru Sugiyama
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
- Author to whom correspondence should be addressed; E-Mail: ; Tel./Fax: +81-3-5465-8743
| | - Atsushi Kittaka
- Faculty of Pharmaceutical Sciences, Teikyo University, Kaga, Itabashi-ku, Tokyo 173-8605, Japan; E-Mail:
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41
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Cancer treatment using peptides: current therapies and future prospects. JOURNAL OF AMINO ACIDS 2012; 2012:967347. [PMID: 23316341 PMCID: PMC3539351 DOI: 10.1155/2012/967347] [Citation(s) in RCA: 296] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Accepted: 12/07/2012] [Indexed: 12/12/2022]
Abstract
This paper discusses the role of peptides in cancer therapy with special emphasis on peptide drugs which are already approved and those in clinical trials. The potential of peptides in cancer treatment is evident from a variety of different strategies that are available to address the progression of tumor growth and propagation of the disease. Use of peptides that can directly target cancer cells without affecting normal cells (targeted therapy) is evolving as an alternate strategy to conventional chemotherapy. Peptide can be utilized directly as a cytotoxic agent through various mechanisms or can act as a carrier of cytotoxic agents and radioisotopes by specifically targeting cancer cells. Peptide-based hormonal therapy has been extensively studied and utilized for the treatment of breast and prostate cancers. Tremendous amount of clinical data is currently available attesting to the efficiency of peptide-based cancer vaccines. Combination therapy is emerging as an important strategy to achieve synergistic effects in fighting cancer as a single method alone may not be efficient enough to yield positive results. Combining immunotherapy with conventional therapies such as radiation and chemotherapy or combining an anticancer peptide with a nonpeptidic cytotoxic drug is an example of this emerging field.
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42
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Brognara E, Fabbri E, Aimi F, Manicardi A, Bianchi N, Finotti A, Breveglieri G, Borgatti M, Corradini R, Marchelli R, Gambari R. Peptide nucleic acids targeting miR-221 modulate p27Kip1 expression in breast cancer MDA-MB-231 cells. Int J Oncol 2012; 41:2119-27. [PMID: 22992757 DOI: 10.3892/ijo.2012.1632] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Accepted: 06/08/2012] [Indexed: 01/02/2023] Open
Abstract
The activity of a peptide nucleic acid (PNA) targeting cancer-associated microRNA-221 is described. PNAs against miR-221 were designed in order to bind very efficiently to the target RNA strand and to undergo efficient uptake in the cells. A polyarginine-PNA conjugate targeted against miR-221 (Rpep-PNA-a221) showed both very high affinity for RNA and efficient cellular uptake without the addition of transfection reagents. Unmodified PNA with the same sequence displayed RNA binding, but cellular uptake was very poor. Consistently, only Rpep-PNA-a221 strongly inhibited miR-221. Targeting miR-221 by PNA resulted in i) lowering of the hybridization levels of miR-221 measured by RT-qPCR, ii) upregulation of p27Kip1 gene expression, measured by RT-qPCR and western blot analysis. The major conclusion of this study is that efficient delivery of anti‑miR PNA through a suitable peptide carrier (Rpep‑PNA-a221) leads to inhibition of miR-221 activity, altering the expression of miR-221-regulated functions in breast cancer cells.
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Affiliation(s)
- Eleonora Brognara
- BioPharmaNet, Department of Biochemistry and Molecular Biology, Ferrara University, Ferrara, Italy
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43
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Morais GR, Paulo A, Santos I. Organometallic Complexes for SPECT Imaging and/or Radionuclide Therapy. Organometallics 2012. [DOI: 10.1021/om300501d] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Goreti Ribeiro Morais
- Unidade de Ciências
Quı́micas e Radiofarmacêuticas, Instituto
Tecnológico e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Estrada Nacional
10, 2686-953, Sacavém, Portugal
| | - António Paulo
- Unidade de Ciências
Quı́micas e Radiofarmacêuticas, Instituto
Tecnológico e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Estrada Nacional
10, 2686-953, Sacavém, Portugal
| | - Isabel Santos
- Unidade de Ciências
Quı́micas e Radiofarmacêuticas, Instituto
Tecnológico e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Estrada Nacional
10, 2686-953, Sacavém, Portugal
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44
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Manicardi A, Fabbri E, Tedeschi T, Sforza S, Bianchi N, Brognara E, Gambari R, Marchelli R, Corradini R. Cellular uptakes, biostabilities and anti-miR-210 activities of chiral arginine-PNAs in leukaemic K562 cells. Chembiochem 2012; 13:1327-37. [PMID: 22639449 PMCID: PMC3401907 DOI: 10.1002/cbic.201100745] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2011] [Indexed: 12/11/2022]
Abstract
A series of 18-mer peptide nucleic acids (PNAs) targeted against micro-RNA miR-210 was synthesised and tested in a cellular system. Unmodified PNAs, R8-conjugated PNAs and modified PNAs containing eight arginine residues on the backbone, either as C2-modified (R) or C5-modified (S) monomers, all with the same sequence, were compared. Two different models were used for the modified PNAs: one with alternated chiral and achiral monomers and one with a stretch of chiral monomers at the N terminus. The melting temperatures of these derivatives were found to be extremely high and 5 m urea was used to assess differences between the different structures. FACS analysis and qRT-PCR on K562 chronic myelogenous leukaemic cells indicated that arginine-conjugated and backbone-modified PNAs display good cellular uptake, with best performances for the C2-modified series. Resistance to enzymatic degradation was found to be higher for the backbone-modified PNAs, thus enhancing the advantage of using these derivatives rather than conjugated PNAs in the cells in serum, and this effect is magnified in the presence of peptidases such as trypsin. Inhibition of miR-210 activity led to changes in the erythroid differentiation pathway, which were more evident in mithramycin-treated cells. Interestingly, the anti-miR activities differed with use of different PNAs, thus suggesting a role of the substituents not only in the cellular uptake, but also in the mechanism of miR recognition and inactivation. This is the first report relating to the use of backbone-modified PNAs as anti-miR agents. The results clearly indicate that backbone-modified PNAs are good candidates for the development of very efficient drugs based on anti-miR activity, due to their enhanced bioavailabilities, and that overall anti-miR performance is a combination of cellular uptake and RNA binding.
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Affiliation(s)
- Alex Manicardi
- Dipartimento di Chimica Organica e Industriale, Università di Parma, Parco Area delle Scienze 17A, 43124 Parma, Italy
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45
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Fabbri E, Brognara E, Borgatti M, Lampronti I, Finotti A, Bianchi N, Sforza S, Tedeschi T, Manicardi A, Marchelli R, Corradini R, Gambari R. miRNA therapeutics: delivery and biological activity of peptide nucleic acids targeting miRNAs. Epigenomics 2012; 3:733-45. [PMID: 22126292 DOI: 10.2217/epi.11.90] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Peptide nucleic acids (PNAs) are DNA/RNA mimics extensively used for pharmacological regulation of gene expression in a variety of cellular and molecular systems, and they have been described as excellent candidates for antisense and antigene therapies. At present, very few data are available on the use of PNAs as molecules targeting miRNAs. miRNAs are a family of small nc RNAs that regulate gene expression by sequence-selective targeting of mRNAs, leading to a translational repression or mRNA degradation to the control of highly regulated biological functions, such as differentiation, cell cycle and apoptosis. The aim of this article is to present the state-of-the-art concerning the possible use of PNAs to target miRNAs and modify their biological metabolism within the cells. The results present in the literature allow to propose PNA-based molecules as very promising reagents to modulate the biological activity of miRNAs. In consideration of the involvement of miRNAs in human pathologies, PNA-mediated targeting of miRNAs has been proposed as a potential novel therapeutic approach.
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Affiliation(s)
- Enrica Fabbri
- Department of Biochemistry & Molecular Biology, University of Ferrara, Ferrara, Italy
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46
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Avitabile C, Saviano M, D'Andrea L, Bianchi N, Fabbri E, Brognara E, Gambari R, Romanelli A. Targeting pre-miRNA by peptide nucleic acids: a new strategy to interfere in the miRNA maturation. ARTIFICIAL DNA, PNA & XNA 2012; 3:88-96. [PMID: 22699795 PMCID: PMC3429535 DOI: 10.4161/adna.20911] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
PNAs conjugated to carrier peptides have been employed for the targeting of miRNA precursor, with the aim to develop molecules able to interfere in the pre-miRNA processing. The capability of the molecules to bind pre-miRNA has been tested in vitro by fluorescence assayes on Thiazole Orange labeled molecules and in vivo, in K562 cells, evaluating the amount of miRNA produced after treatment of cells with two amounts of PNAs.
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Affiliation(s)
- Concetta Avitabile
- Dipartimento delle Scienze Biologiche, Università di Napoli "Federico II", Napoli, Italy
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47
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Noguchi E, Shigi N, Komiyama M. Intracellular Localization of PNA in Human Cells upon its Introduction by Electroporation. Nat Prod Commun 2012. [DOI: 10.1177/1934578x1200700316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Peptide nucleic acid (PNA) is one of the most useful DNA analogs in a wide variety of gene analysis in human cells. In order to exhibit its maximal functions, PNA must be localized to a desired place (e.g., nucleus, cytoplasm and other organelles). Here, we introduced PNAs into HeLa cells by electroporation and examined their localization at various time points. The PNA which binds to the mitochondrial COII gene was initially accumulated in the nucleus, and thereafter mostly transferred to cytoplasm. This time-dependent intracellular localization of PNA is ascribed to the breakdown of the nuclear envelope in the cell division. On the other hand, another PNA that binds to telomere repeat sequence mostly remained in the nucleus, even after the cell division occurred. The retention of this PNA in the nucleus was further enhanced when it was conjugated with Cy3.
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Affiliation(s)
- Eri Noguchi
- Research Center for Advanced Science and Technology, The University of Tokyo,4-6-1 Komaba, Meguro-ku, Tokyo, Japan 153-8904
| | - Narumi Shigi
- Research Center for Advanced Science and Technology, The University of Tokyo,4-6-1 Komaba, Meguro-ku, Tokyo, Japan 153-8904
| | - Makoto Komiyama
- Research Center for Advanced Science and Technology, The University of Tokyo,4-6-1 Komaba, Meguro-ku, Tokyo, Japan 153-8904
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48
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Abstract
To address the poor outcomes in rhabdomyosarcoma, particularly the alveolar subtype, new therapies are needed. Potential cancer-specific alterations that may be molecular targets include gene fusions or copy number changes. Following the latter strategy, an attractive antigene approach was developed to inhibit MYCN oncogene expression in rhabdomyosarcoma.
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Affiliation(s)
- Frederic G Barr
- Laboratory of Pathology, National Cancer Institute, Bethesda, MD 20892
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49
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Tonelli R, McIntyre A, Camerin C, Walters ZS, Di Leo K, Selfe J, Purgato S, Missiaglia E, Tortori A, Renshaw J, Astolfi A, Taylor KR, Serravalle S, Bishop R, Nanni C, Valentijn LJ, Faccini A, Leuschner I, Formica S, Reis-Filho JS, Ambrosini V, Thway K, Franzoni M, Summersgill B, Marchelli R, Hrelia P, Cantelli-Forti G, Fanti S, Corradini R, Pession A, Shipley J. Antitumor activity of sustained N-myc reduction in rhabdomyosarcomas and transcriptional block by antigene therapy. Clin Cancer Res 2011; 18:796-807. [PMID: 22065083 DOI: 10.1158/1078-0432.ccr-11-1981] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Rhabdomyosarcomas are a major cause of cancer death in children, described with MYCN amplification and, in the alveolar subtype, transcription driven by the PAX3-FOXO1 fusion protein. Our aim was to determine the prevalence of N-Myc protein expression and the potential therapeutic effects of reducing expression in rhabdomyosarcomas, including use of an antigene strategy that inhibits transcription. EXPERIMENTAL DESIGN Protein expression was assessed by immunohistochemistry. MYCN expression was reduced in representative cell lines by RNA interference and an antigene peptide nucleic acid (PNA) oligonucleotide conjugated to a nuclear localization signal peptide. Associated gene expression changes, cell viability, and apoptosis were analyzed in vitro. As a paradigm for antigene therapy, the effects of systemic treatment of mice with rhabdomyosarcoma cell line xenografts were determined. RESULTS High N-Myc levels were significantly associated with genomic amplification, presence of the PAX3/7-FOXO1 fusion genes, and proliferative capacity. Sustained reduction of N-Myc levels in all rhabdomyosarcoma cell lines that express the protein decreased cell proliferation and increased apoptosis. Positive feedback was shown to regulate PAX3-FOXO1 and N-Myc levels in the alveolar subtype that critically decrease PAX3-FOXO1 levels on reducing N-Myc. Pharmacologic systemic administration of the antigene PNA can eliminate alveolar rhabdomyosarcoma xenografts in mice, without relapse or toxicity. CONCLUSION N-Myc, with its restricted expression in non-fetal tissues, is a therapeutic target to treat rhabdomyosarcomas, and blocking gene transcription using antigene oligonucleotide strategies has therapeutic potential in the treatment of cancer and other diseases that has not been previously realized in vivo.
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Affiliation(s)
- Roberto Tonelli
- Department of Pediatric Hematology, University of Bologna, Bologna, Italy.
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50
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Fabbri E, Manicardi A, Tedeschi T, Sforza S, Bianchi N, Brognara E, Finotti A, Breveglieri G, Borgatti M, Corradini R, Marchelli R, Gambari R. Modulation of the biological activity of microRNA-210 with peptide nucleic acids (PNAs). ChemMedChem 2011; 6:2192-202. [PMID: 22012891 DOI: 10.1002/cmdc.201100270] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Revised: 09/28/2011] [Indexed: 12/13/2022]
Abstract
Herein we describe the activity of a peptide nucleic acid (PNA) that targets microRNA-210 (miR-210), which is associated with hypoxia and is modulated during erythroid differentiation. PNAs directed against miR-210 were designed to bind with high affinity to the target RNA strand and to undergo efficient uptake in target cells. A polyarginine-PNA conjugate directed against miR-210 (Rpep-PNA-a210) showed both very high affinity for RNA and efficient uptake into target cells without the need for transfection reagents. An unmodified PNA of the same sequence displayed the ability to bind RNA, but cellular uptake was very poor. Consistent with this, only Rpep-PNA-a210 strongly inhibited miR-210 activity, as evaluated by assays on undifferentiated K562 cells and on cells treated with mithramycin, which was found to induce erythroid differentiation and miR-210 overexpression. Targeting miR-210 by Rpep-PNA-a210 resulted in: 1) a decrease in miR-210 levels as measured by RT-PCR, 2) up-regulation of raptor mRNA, 3) a decrease in γ-globin mRNA, and 4) decreased expression of differentiated functions (i.e., proportion of benzidine-positive cells, content of embryo-fetal hemoglobins). The efficient delivery of anti-miR PNAs through a suitable peptide carrier (Rpep-PNA-a210) leads to the inhibition of miR-210 activity, altering the expression of miR-210-regulated erythroid functions.
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Affiliation(s)
- Enrica Fabbri
- BioPharmaNet, Department of Biochemistry and Molecular Biology, University of Ferrara, Via Fossato di Mortara n.74, 44121 Ferrara, Italy.
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