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Chiariello M, Inzalaco G, Barone V, Gherardini L. Overcoming challenges in glioblastoma treatment: targeting infiltrating cancer cells and harnessing the tumor microenvironment. Front Cell Neurosci 2023; 17:1327621. [PMID: 38188666 PMCID: PMC10767996 DOI: 10.3389/fncel.2023.1327621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 12/05/2023] [Indexed: 01/09/2024] Open
Abstract
Glioblastoma (GB) is a highly malignant primary brain tumor with limited treatment options and poor prognosis. Despite current treatment approaches, including surgical resection, radiation therapy, and chemotherapy with temozolomide (TMZ), GB remains mostly incurable due to its invasive growth pattern, limited drug penetration beyond the blood-brain barrier (BBB), and resistance to conventional therapies. One of the main challenges in GB treatment is effectively eliminating infiltrating cancer cells that remain in the brain parenchyma after primary tumor resection. We've reviewed the most recent challenges and surveyed the potential strategies aimed at enhancing local treatment outcomes.
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Affiliation(s)
- Mario Chiariello
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche, Via Fiorentina, Siena, Italy
- Core Research Laboratory (CRL), Istituto per lo Studio, la Prevenzione e la Rete Oncologica (ISPRO), Via Fiorentina, Siena, Italy
| | - Giovanni Inzalaco
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche, Via Fiorentina, Siena, Italy
- Core Research Laboratory (CRL), Istituto per lo Studio, la Prevenzione e la Rete Oncologica (ISPRO), Via Fiorentina, Siena, Italy
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Virginia Barone
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Lisa Gherardini
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche, Via Fiorentina, Siena, Italy
- Core Research Laboratory (CRL), Istituto per lo Studio, la Prevenzione e la Rete Oncologica (ISPRO), Via Fiorentina, Siena, Italy
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2
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Chiariello M, Gherardini L. Aiming for the brain: a new thermogel-based drug delivery platform. Cell Signaling 2023; 1:35-37. [DOI: 10.46439/signaling.1.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Glioblastoma Multiforme (GBM) is one of the most lethal human cancer types, with a 5-year survival rate of approximately 5%. A key reason for this is usually considered its poor accessibility to systemically administered drugs that only limitedly overcome the Blood Brain Barrier, ultimately causing the likely dismal appearance of recurrences. Here, we comment on our successful use, in GBM preclinical models, of novel thermogel based drug-delivery platforms for loco-regional treatment of tumor recurrences after primary surgery. The innovation as well as the pitfalls of our processes are outlined and discussed with an eye towards potential advancements in the realm of personalized medicine applications.
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Affiliation(s)
- Mario Chiariello
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche, Via Fiorentina 1 53100, Siena, Italy
| | - Lisa Gherardini
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche, Via Fiorentina 1 53100, Siena, Italy
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3
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Gherardini L, Vetri Buratti V, Maturi M, Inzalaco G, Locatelli E, Sambri L, Gargiulo S, Barone V, Bonente D, Bertelli E, Tortorella S, Franci L, Fioravanti A, Comes Franchini M, Chiariello M. Loco-regional treatment with temozolomide-loaded thermogels prevents glioblastoma recurrences in orthotopic human xenograft models. Sci Rep 2023; 13:4630. [PMID: 36944737 PMCID: PMC10030813 DOI: 10.1038/s41598-023-31811-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 03/17/2023] [Indexed: 03/23/2023] Open
Abstract
Glioblastoma multiforme (GBM) is the most aggressive primary tumor of the central nervous system and the diagnosis is often dismal. GBM pharmacological treatment is strongly limited by its intracranial location beyond the blood-brain barrier (BBB). While Temozolomide (TMZ) exhibits the best clinical performance, still less than 20% crosses the BBB, therefore requiring administration of very high doses with resulting unnecessary systemic side effects. Here, we aimed at designing new negative temperature-responsive gel formulations able to locally release TMZ beyond the BBB. The biocompatibility of a chitosan-β-glycerophosphate-based thermogel (THG)-containing mesoporous SiO2 nanoparticles (THG@SiO2) or polycaprolactone microparticles (THG@PCL) was ascertained in vitro and in vivo by cell counting and histological examination. Next, we loaded TMZ into such matrices (THG@SiO2-TMZ and THG@PCL-TMZ) and tested their therapeutic potential both in vitro and in vivo, in a glioblastoma resection and recurrence mouse model based on orthotopic growth of human cancer cells. The two newly designed anticancer formulations, consisting in TMZ-silica (SiO2@TMZ) dispersed in the thermogel matrix (THG@SiO2-TMZ) and TMZ, spray-dried on PLC and incorporated into the thermogel (THG@PCL-TMZ), induced cell death in vitro. When applied intracranially to a resected U87-MG-Red-FLuc human GBM model, THG@SiO2-TMZ and THG@PCL-TMZ caused a significant reduction in the growth of tumor recurrences, when compared to untreated controls. THG@SiO2-TMZ and THG@PCL-TMZ are therefore new promising gel-based local therapy candidates for the treatment of GBM.
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Affiliation(s)
- Lisa Gherardini
- Istituto di Fisiologia Clinica (IFC), Consiglio Nazionale delle Ricerche (CNR), Via Fiorentina, 53100, Siena, Italy
| | - Veronica Vetri Buratti
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, Viale Risorgimento 4, 40126, Bologna, Italy
| | - Mirko Maturi
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, Viale Risorgimento 4, 40126, Bologna, Italy
| | - Giovanni Inzalaco
- Istituto di Fisiologia Clinica (IFC), Consiglio Nazionale delle Ricerche (CNR), Via Fiorentina, 53100, Siena, Italy
- Core Research Laboratory (CRL), Istituto per lo Studio, la Prevenzione e la Rete Oncologica (ISPRO), Via Fiorentina 1, 53100, Siena, Italy
- University of Siena, Siena, Via Banchi di Sotto 55, 53100, Siena, Italy
| | - Erica Locatelli
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, Viale Risorgimento 4, 40126, Bologna, Italy
| | - Letizia Sambri
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, Viale Risorgimento 4, 40126, Bologna, Italy
| | - Sara Gargiulo
- Istituto di Fisiologia Clinica (IFC), Consiglio Nazionale delle Ricerche (CNR), Via Fiorentina, 53100, Siena, Italy
| | - Virginia Barone
- Department of Molecular and Developmental Medicine, University of Siena, Via Aldo Moro 2, 53100, Siena, Italy
| | - Denise Bonente
- Department of Molecular and Developmental Medicine, University of Siena, Via Aldo Moro 2, 53100, Siena, Italy
- Department of Life Sciences, University of Siena, 53100, Siena, Italy
| | - Eugenio Bertelli
- Department of Molecular and Developmental Medicine, University of Siena, Via Aldo Moro 2, 53100, Siena, Italy
| | - Silvia Tortorella
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, Viale Risorgimento 4, 40126, Bologna, Italy
| | - Lorenzo Franci
- Istituto di Fisiologia Clinica (IFC), Consiglio Nazionale delle Ricerche (CNR), Via Fiorentina, 53100, Siena, Italy
- Core Research Laboratory (CRL), Istituto per lo Studio, la Prevenzione e la Rete Oncologica (ISPRO), Via Fiorentina 1, 53100, Siena, Italy
| | | | - Mauro Comes Franchini
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, Viale Risorgimento 4, 40126, Bologna, Italy.
| | - Mario Chiariello
- Istituto di Fisiologia Clinica (IFC), Consiglio Nazionale delle Ricerche (CNR), Via Fiorentina, 53100, Siena, Italy.
- Core Research Laboratory (CRL), Istituto per lo Studio, la Prevenzione e la Rete Oncologica (ISPRO), Via Fiorentina 1, 53100, Siena, Italy.
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Gherardini L, Inzalaco G, Imperatore F, D’Aurizio R, Franci L, Miragliotta V, Boccuto A, Calandro P, Andreini M, Tarditi A, Chiariello M. The FHP01 DDX3X Helicase Inhibitor Exerts Potent Anti-Tumor Activity In Vivo in Breast Cancer Pre-Clinical Models. Cancers (Basel) 2021; 13:cancers13194830. [PMID: 34638314 PMCID: PMC8507746 DOI: 10.3390/cancers13194830] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 09/22/2021] [Indexed: 12/25/2022] Open
Abstract
Inhibition of DDX3X expression or activity reduces proliferation in cells from various tumor tissues, in particular in breast cancer, and its expression often correlates to tumor aggressiveness. This makes DDX3X a prominent candidate for the design of drugs for novel personalized therapeutic strategies. Starting from an in silico drug discovery approach, a group of molecules has been selected by molecular docking at the RNA binding site of DDX3X. Here, the most promising among them, FHP01, was evaluated in breast cancer preclinical models. Specifically, FHP01 exhibited very effective antiproliferative and killing activity against different breast cancer cell types, among which those from triple-negative breast cancer (TNBC). Interestingly, FHP01 also inhibited WNT signaling, a key tumorigenic pathway already correlated to DDX3X functions in breast cancer model cell lines. Ultimately, FHP01 also caused a significant reduction, in vivo, in the growth of MDA MB 231-derived TNBC xenograft models. Importantly, FHP01 showed good bioavailability and no toxicity on normal peripheral blood mononuclear cells in vitro and on several mouse tissues in vivo. Overall, our data suggest that the use of FHP01 and its related compounds may represent a novel therapeutic approach with high potential against breast cancer, including the triple-negative subtype usually correlated to the most unfavorable outcomes because of the lack of available targeted therapies.
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Affiliation(s)
- Lisa Gherardini
- Istituto di Fisiologia Clinica (IFC), Consiglio Nazionale delle Ricerche (CNR), 53100 Siena, Italy; (L.G.); (G.I.); (F.I.); (L.F.)
| | - Giovanni Inzalaco
- Istituto di Fisiologia Clinica (IFC), Consiglio Nazionale delle Ricerche (CNR), 53100 Siena, Italy; (L.G.); (G.I.); (F.I.); (L.F.)
- Core Research Laboratory (CRL), Istituto per lo Studio, la Prevenzione e la Rete Oncologica (ISPRO), 53100 Siena, Italy;
- Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy;
| | - Francesco Imperatore
- Istituto di Fisiologia Clinica (IFC), Consiglio Nazionale delle Ricerche (CNR), 53100 Siena, Italy; (L.G.); (G.I.); (F.I.); (L.F.)
| | - Romina D’Aurizio
- Istituto di Informatica e Telematica (IIT), Consiglio Nazionale delle Ricerche (CNR), 56124 Pisa, Italy;
| | - Lorenzo Franci
- Istituto di Fisiologia Clinica (IFC), Consiglio Nazionale delle Ricerche (CNR), 53100 Siena, Italy; (L.G.); (G.I.); (F.I.); (L.F.)
- Core Research Laboratory (CRL), Istituto per lo Studio, la Prevenzione e la Rete Oncologica (ISPRO), 53100 Siena, Italy;
- Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy;
| | | | - Adele Boccuto
- Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy;
| | - Pierpaolo Calandro
- Core Research Laboratory (CRL), Istituto per lo Studio, la Prevenzione e la Rete Oncologica (ISPRO), 53100 Siena, Italy;
| | - Matteo Andreini
- First Health Pharmaceutical B.V., 1098 XH Amsterdam, The Netherlands; (M.A.); (A.T.)
| | - Alessia Tarditi
- First Health Pharmaceutical B.V., 1098 XH Amsterdam, The Netherlands; (M.A.); (A.T.)
| | - Mario Chiariello
- Istituto di Fisiologia Clinica (IFC), Consiglio Nazionale delle Ricerche (CNR), 53100 Siena, Italy; (L.G.); (G.I.); (F.I.); (L.F.)
- Core Research Laboratory (CRL), Istituto per lo Studio, la Prevenzione e la Rete Oncologica (ISPRO), 53100 Siena, Italy;
- Correspondence: ; Tel.: +39-057-723-1274
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5
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Kusmic C, Vizzoca A, Taranta M, Tedeschi L, Gherardini L, Pelosi G, Giannetti A, Tombelli S, Grimaldi S, Baldini F, Domenici C, Trivella MG, Cinti C. Silencing Survivin: a Key Therapeutic Strategy for Cardiac Hypertrophy. J Cardiovasc Transl Res 2021; 15:391-407. [PMID: 34409583 DOI: 10.1007/s12265-021-10165-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 08/05/2021] [Indexed: 11/29/2022]
Abstract
Cardiac hypertrophy, in its aspects of localized thickening of the interventricular septum and concentric increase of the left ventricle, constitutes a risk factor of heart failure. Myocardial hypertrophy, in the presence of different degree of myocardial fibrosis, is paralleled by significant molecular, cellular, and histological changes inducing alteration of cardiac extracellular matrix composition as well as sarcomeres and cytoskeleton remodeling. Previous studies indicate osteopontin (OPN) and more recently survivin (SURV) overexpression as the hallmarks of heart failure although SURV function in the heart is not completely clarified. In this study, we investigated the involvement of SURV in intracellular signaling of hypertrophic cardiomyocytes and the impact of its transcriptional silencing, laying the foundation for novel target gene therapy in cardiac hypertrophy. Oligonucleotide-based molecules, like theranostic optical nanosensors (molecular beacons) and siRNAs, targeting SURV and OPN mRNAs, were developed. Their diagnostic and therapeutic potential was evaluated in vitro in hypertrophic FGF23-induced human cardiomyocytes and in vivo in transverse aortic constriction hypertrophic mouse model. Engineered erythrocyte was used as shuttle to selectively target and transfer siRNA molecules into unhealthy cardiac cells in vivo. The results highlight how the SURV knockdown could negatively influence the expression of genes involved in myocardial fibrosis in vitro and restores structural, functional, and morphometric features in vivo. Together, these data suggested that SURV is a key factor in inducing cardiomyocytes hypertrophy, and its shutdown is crucial in slowing disease progression as well as reversing cardiac hypertrophy. In the perspective, targeted delivery of siRNAs through engineered erythrocytes can represent a promising therapeutic strategy to treat cardiac hypertrophy. Theranostic SURV molecular beacon (MB-SURV), transfected into FGF23-induced hypertrophic human cardiomyocytes, significantly dampened SURV overexpression. SURV down-regulation determines the tuning down of MMP9, TIMP1 and TIMP4 extracellular matrix remodeling factors while induces the overexpression of the cardioprotective MCAD factor, which counterbalance the absence of pro-survival and anti-apoptotic SURV activity to protect cardiomyocytes from death. In transverse aortic constriction (TAC) mouse model, the SURV silencing restores the LV mass levels to values not different from the sham group and counteracts the progressive decline of EF, maintaining its values always higher with respect to TAC group. These data demonstrate the central role of SURV in the cardiac reverse remodeling and its therapeutic potential to reverse cardiac hypertrophy.
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Affiliation(s)
- Claudia Kusmic
- Institute of Clinical Physiology (IFC), National Research Council of Italy (CNR), via Moruzzi 1, 56124, Pisa, Italy
| | - Alessio Vizzoca
- Institute of Organic Synthesis and Photoreactivity (ISOF), National Research Council of Italy (CNR), Via Gobetti 101, 40129, Bologna, Italy
| | - Monia Taranta
- Institute of Clinical Physiology (IFC), National Research Council of Italy (CNR), via Moruzzi 1, 56124, Pisa, Italy
| | - Lorena Tedeschi
- Institute of Clinical Physiology (IFC), National Research Council of Italy (CNR), via Moruzzi 1, 56124, Pisa, Italy
| | - Lisa Gherardini
- Institute of Clinical Physiology (IFC), National Research Council of Italy (CNR), via Moruzzi 1, 56124, Pisa, Italy
| | - Gualtiero Pelosi
- Institute of Clinical Physiology (IFC), National Research Council of Italy (CNR), via Moruzzi 1, 56124, Pisa, Italy
| | - Ambra Giannetti
- Institute of Applied Physics, Nello Carrara"(IFAC), National Research Council of Italy (CNR), Florence, Italy
| | - Sara Tombelli
- Institute of Applied Physics, Nello Carrara"(IFAC), National Research Council of Italy (CNR), Florence, Italy
| | - Settimio Grimaldi
- Institute of Translational Pharmacology (IFT), National Research Council of Italy (CNR), Rome, Italy
| | - Francesco Baldini
- Institute of Applied Physics, Nello Carrara"(IFAC), National Research Council of Italy (CNR), Florence, Italy
| | - Claudio Domenici
- Institute of Clinical Physiology (IFC), National Research Council of Italy (CNR), via Moruzzi 1, 56124, Pisa, Italy
| | - Maria Giovanna Trivella
- Institute of Clinical Physiology (IFC), National Research Council of Italy (CNR), via Moruzzi 1, 56124, Pisa, Italy.
| | - Caterina Cinti
- Institute of Clinical Physiology (IFC), National Research Council of Italy (CNR), via Moruzzi 1, 56124, Pisa, Italy.
- Institute of Organic Synthesis and Photoreactivity (ISOF), National Research Council of Italy (CNR), Via Gobetti 101, 40129, Bologna, Italy.
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6
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Gennaro M, Mattiello A, Mazziotti R, Antonelli C, Gherardini L, Guzzetta A, Berardi N, Cioni G, Pizzorusso T. Focal Stroke in the Developing Rat Motor Cortex Induces Age- and Experience-Dependent Maladaptive Plasticity of Corticospinal System. Front Neural Circuits 2017; 11:47. [PMID: 28706475 PMCID: PMC5489564 DOI: 10.3389/fncir.2017.00047] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 06/13/2017] [Indexed: 12/16/2022] Open
Abstract
Motor system development is characterized by an activity-dependent competition between ipsilateral and contralateral corticospinal tracts (CST). Clinical evidence suggests that age is crucial for developmental stroke outcome, with early lesions inducing a “maladaptive” strengthening of ipsilateral projections from the healthy hemisphere and worse motor impairment. Here, we investigated in developing rats the relation between lesion timing, motor outcome and CST remodeling pattern. We induced a focal ischemia into forelimb motor cortex (fM1) at two distinct pre-weaning ages: P14 and P21. We compared long-term motor outcome with changes in axonal sprouting of contralesional CST at red nucleus and spinal cord level using anterograde tracing. We found that P14 stroke caused a more severe long-term motor impairment than at P21, and induced a strong and aberrant contralesional CST sprouting onto denervated spinal cord and red nucleus. The mistargeted sprouting of CST, and the worse motor outcome of the P14 stroke rats were reversed by an early skilled motor training, underscoring the potential of early activity-dependent plasticity in modulating lesion outcome. Thus, changes in the mechanisms controlling CST plasticity occurring during the third postnatal week are associated with age-dependent regulation of the motor outcome after stroke.
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Affiliation(s)
- Mariangela Gennaro
- Department of Neuroscience, Psychology, Drug Research and Child Health NEUROFARBA, University of FlorenceFlorence, Italy.,Institute of Neuroscience, National Research Council (CNR)Pisa, Italy
| | - Alessandro Mattiello
- Department of Neuroscience, Psychology, Drug Research and Child Health NEUROFARBA, University of FlorenceFlorence, Italy.,Institute of Neuroscience, National Research Council (CNR)Pisa, Italy
| | - Raffaele Mazziotti
- Department of Neuroscience, Psychology, Drug Research and Child Health NEUROFARBA, University of FlorenceFlorence, Italy.,Institute of Neuroscience, National Research Council (CNR)Pisa, Italy
| | - Camilla Antonelli
- Department of Clinical and Experimental Medicine, University of PisaPisa, Italy.,Department of Developmental Neuroscience, IRCCS Stella Maris Scientific InstitutePisa, Italy
| | - Lisa Gherardini
- Institute of Neuroscience, National Research Council (CNR)Pisa, Italy.,Institute of Clinical Physiology, National Research Council (CNR)Siena, Italy
| | - Andrea Guzzetta
- Department of Clinical and Experimental Medicine, University of PisaPisa, Italy.,Department of Developmental Neuroscience, IRCCS Stella Maris Scientific InstitutePisa, Italy
| | - Nicoletta Berardi
- Department of Neuroscience, Psychology, Drug Research and Child Health NEUROFARBA, University of FlorenceFlorence, Italy.,Institute of Neuroscience, National Research Council (CNR)Pisa, Italy
| | - Giovanni Cioni
- Department of Clinical and Experimental Medicine, University of PisaPisa, Italy.,Department of Developmental Neuroscience, IRCCS Stella Maris Scientific InstitutePisa, Italy
| | - Tommaso Pizzorusso
- Department of Neuroscience, Psychology, Drug Research and Child Health NEUROFARBA, University of FlorenceFlorence, Italy.,Institute of Neuroscience, National Research Council (CNR)Pisa, Italy
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Gherardini L, Sharma A, Capobianco E, Cinti C. Targeting Cancer with Epi-Drugs: A Precision Medicine Perspective. Curr Pharm Biotechnol 2016; 17:856-65. [PMID: 27229488 DOI: 10.2174/1381612822666160527154757] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 05/06/2016] [Accepted: 05/23/2016] [Indexed: 11/22/2022]
Abstract
Recent pan-cancer studies have shown the importance of coupling DNA methylation patterns with transcriptome profiles to reveal tumor subgroups with clinically relevant distinct characteristics. While the coupling patterns remain in most cases matter for further study and/or interpretation, it is emerging that all associations between epigenetic changes and specific cancer histotypes can facilitate the development of novel epidrugs. In particular, together with chemotherapy and chemoprevention of cancer, these epidrugs will target specific enzymes involved in the complex regulation of gene expression. This perspective surveys recent cancer epigenetic findings on target drugs and therapeutic strategies, and focuses on the epigenetic modifications that can reverse a stable differentiated state of adult cell towards neoplastic phenotypes. The relevance of such developments may thus pave the way for patient's customized personalized therapies.
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Affiliation(s)
| | | | - Enrico Capobianco
- Center for Computational Science (CCS), University of Miami, Miami, FL, USA.
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8
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Naldi I, Taranta M, Gherardini L, Pelosi G, Viglione F, Grimaldi S, Pani L, Cinti C. Novel epigenetic target therapy for prostate cancer: a preclinical study. PLoS One 2014; 9:e98101. [PMID: 24851905 PMCID: PMC4031137 DOI: 10.1371/journal.pone.0098101] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Accepted: 04/28/2014] [Indexed: 01/06/2023] Open
Abstract
Epigenetic events are critical contributors to the pathogenesis of cancer, and targeting epigenetic mechanisms represents a novel strategy in anticancer therapy. Classic demethylating agents, such as 5-Aza-2′-deoxycytidine (Decitabine), hold the potential for reprograming somatic cancer cells demonstrating high therapeutic efficacy in haematological malignancies. On the other hand, epigenetic treatment of solid tumours often gives rise to undesired cytotoxic side effects. Appropriate delivery systems able to enrich Decitabine at the site of action and improve its bioavailability would reduce the incidence of toxicity on healthy tissues. In this work we provide preclinical evidences of a safe, versatile and efficient targeted epigenetic therapy to treat hormone sensitive (LNCap) and hormone refractory (DU145) prostate cancers. A novel Decitabine formulation, based on the use of engineered erythrocyte (Erythro-Magneto-Hemagglutinin Virosomes, EMHVs) drug delivery system (DDS) carrying this drug, has been refined. Inside the EMHVs, the drug was shielded from the environment and phosphorylated in its active form. The novel magnetic EMHV DDS, endowed with fusogenic protein, improved the stability of the carried drug and exhibited a high efficiency in confining its delivery at the site of action in vivo by applying an external static magnetic field. Here we show that Decitabine loaded into EMHVs induces a significant tumour mass reduction in prostate cancer xenograft models at a concentration, which is seven hundred times lower than the therapeutic dose, suggesting an improved pharmacokinetics/pharmacodynamics of drug. These results are relevant for and discussed in light of developing personalised autologous therapies and innovative clinical approach for the treatment of solid tumours.
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Affiliation(s)
- Ilaria Naldi
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche (CNR), Experimental Oncology Unit, Siena, Italy
| | - Monia Taranta
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche (CNR), Experimental Oncology Unit, Siena, Italy
| | - Lisa Gherardini
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche (CNR), Experimental Oncology Unit, Siena, Italy
| | - Gualtiero Pelosi
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche (CNR), Pisa, Italy
| | - Federica Viglione
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche (CNR), Pisa, Italy
| | - Settimio Grimaldi
- Institute of Translational Pharmacology, Consiglio Nazionale delle Ricerche (CNR), Rome, Italy
| | - Luca Pani
- Institute of Translational Pharmacology, Consiglio Nazionale delle Ricerche (CNR), Cagliari, Italy
| | - Caterina Cinti
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche (CNR), Experimental Oncology Unit, Siena, Italy
- * E-mail:
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9
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Gherardini L, Ciuti G, Tognarelli S, Cinti C. Searching for the perfect wave: the effect of radiofrequency electromagnetic fields on cells. Int J Mol Sci 2014; 15:5366-87. [PMID: 24681584 PMCID: PMC4013569 DOI: 10.3390/ijms15045366] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 01/17/2014] [Accepted: 03/20/2014] [Indexed: 12/23/2022] Open
Abstract
There is a growing concern in the population about the effects that environmental exposure to any source of “uncontrolled” radiation may have on public health. Anxiety arises from the controversial knowledge about the effect of electromagnetic field (EMF) exposure to cells and organisms but most of all concerning the possible causal relation to human diseases. Here we reviewed those in vitro and in vivo and epidemiological works that gave a new insight about the effect of radio frequency (RF) exposure, relating to intracellular molecular pathways that lead to biological and functional outcomes. It appears that a thorough application of standardized protocols is the key to reliable data acquisition and interpretation that could contribute a clearer picture for scientists and lay public. Moreover, specific tuning of experimental and clinical RF exposure might lead to beneficial health effects.
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Affiliation(s)
- Lisa Gherardini
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche Siena, Strada Petriccio e Belriguardo, Siena 53100, Italy.
| | - Gastone Ciuti
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Viale Rinaldo Piaggio 34, Pisa 56025, Italy.
| | - Selene Tognarelli
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Viale Rinaldo Piaggio 34, Pisa 56025, Italy.
| | - Caterina Cinti
- Institute of Clinical Physiology, Consiglio Nazionale delle Ricerche Siena, Strada Petriccio e Belriguardo, Siena 53100, Italy.
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Bardi G, Nunes A, Gherardini L, Bates K, Al-Jamal KT, Gaillard C, Prato M, Bianco A, Pizzorusso T, Kostarelos K. Functionalized carbon nanotubes in the brain: cellular internalization and neuroinflammatory responses. PLoS One 2013; 8:e80964. [PMID: 24260521 PMCID: PMC3832421 DOI: 10.1371/journal.pone.0080964] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Accepted: 10/08/2013] [Indexed: 11/19/2022] Open
Abstract
The potential use of functionalized carbon nanotubes (f-CNTs) for drug and gene delivery to the central nervous system (CNS) and as neural substrates makes the understanding of their in vivo interactions with the neural tissue essential. The aim of this study was to investigate the interactions between chemically functionalized multi-walled carbon nanotubes (f-MWNTs) and the neural tissue following cortical stereotactic administration. Two different f-MWNT constructs were used in these studies: shortened (by oxidation) amino-functionalized MWNT (oxMWNT-NH3(+)) and amino-functionalized MWNT (MWNT-NH3(+)). Parenchymal distribution of the stereotactically injected f-MWNTs was assessed by histological examination. Both f-MWNT were uptaken by different types of neural tissue cells (microglia, astrocytes and neurons), however different patterns of cellular internalization were observed between the nanotubes. Furthermore, immunohistochemical staining for specific markers of glial cell activation (GFAP and CD11b) was performed and secretion of inflammatory cytokines was investigated using real-time PCR (qRT-PCR). Injections of both f-MWNT constructs led to a local and transient induction of inflammatory cytokines at early time points. Oxidation of nanotubes seemed to induce significant levels of GFAP and CD11b over-expression in areas peripheral to the f-MWNT injection site. These results highlight the importance of nanotube functionalization on their interaction with brain tissue that is deemed critical for the development nanotube-based vector systems for CNS applications.
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Affiliation(s)
- Giuseppe Bardi
- CNR Neuroscience Institute, Pisa Area della recerca, Pisa, Italy and Center for MicroBioRobotics, IIT@SSSA, Pontedera, Pisa, Italy
- * E-mail: (KK); (TP)
| | - Antonio Nunes
- Nanomedicine Laboratory, UCL School of Pharmacy, University College London, London, United Kingdom
| | - Lisa Gherardini
- CNR Neuroscience Institute, Pisa Area della recerca, Pisa, Italy and Center for MicroBioRobotics, IIT@SSSA, Pontedera, Pisa, Italy
- * E-mail: (KK); (TP)
| | - Katie Bates
- Nanomedicine Laboratory, UCL School of Pharmacy, University College London, London, United Kingdom
| | - Khuloud T. Al-Jamal
- Nanomedicine Laboratory, UCL School of Pharmacy, University College London, London, United Kingdom
| | - Claire Gaillard
- CNRS, Institut de Biologie Moléculaire et Cellulaire, UPR 9021 Immunologie et Chimie Thérapeutiques, Strasbourg, France
| | - Maurizio Prato
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Alberto Bianco
- CNRS, Institut de Biologie Moléculaire et Cellulaire, UPR 9021 Immunologie et Chimie Thérapeutiques, Strasbourg, France
| | - Tommaso Pizzorusso
- CNR Neuroscience Institute, Pisa Area della recerca, Pisa, Italy and Center for MicroBioRobotics, IIT@SSSA, Pontedera, Pisa, Italy
- Department of Psychology, University of Florence, Area San Salvi, Florence, Italy
- * E-mail: (KK); (TP)
| | - Kostas Kostarelos
- Nanomedicine Laboratory, UCL School of Pharmacy, University College London, London, United Kingdom
- * E-mail: (KK); (TP)
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Grandi A, Campagnoli S, Parri M, De Camilli E, Naldi I, Gherardini L, Cinti C, Terracciano L, Jin B, Sarmientos P, Viale G, Grandi G, Pileri P, Grifantini RM. Abstract C190: A novel monoclonal antibody for colon cancer therapy. Mol Cancer Ther 2013. [DOI: 10.1158/1535-7163.targ-13-c190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
In our recent research activities, we identified 89 novel candidate markers for prevalent cancers by a systematic Tissue microarray analysis (TMA) of a large collection of polyclonal antibodies (approximately 1600) raised against membrane-associated and secreted human proteins currently marginally characterized. Monoclonal antibodies were generated towards 20 distinct antigens that are being characterized and validated for diagnostic and therapeutic applications.
Here we describe a monoclonal antibody (mAb) targeting a protein of the protocadherin- family in colo-rectal cancer (CRC). The antibody specifically recognizes its target protein in cancer tissues, with concomitant negligible or marginal reactivity in normal colon. The protein was not previously described as CRC target. IHC data from CRC samples of approximately 200 patients, (collected at the bio-bank of the institute for Pathology of Basel, Switzerland and at the European Institute of Pathology of Milan, Italy) showed that the antibody binds up to 80% CRC cases (stages from 1 to 4) with high or moderate intensity. In most cases, the antibody gives plasma membrane by Immune Histochemistry (IHC). An expanded analysis on approximately 1000 CRC cases is ongoing to assess whether the membranous IHC staining associates with specific clinic-pathological parameters.
IHC analysis of 35 normal human tissues revealed that it gives intracellular staining in skeletal muscle, pituitary glands and prostate, whereas it gives background irrelevant staining in the other 32 tissues. The antibody is able to bind the surface of different colon cancer cells in vitro and in vivo. Upon binding it is efficiently internalized by colon cancer cells, suggesting that it can be exploited for the development of Antibody-Drug-Conjugate (ADC). Moreover, it inhibits tumor growth in athymic nude mice bearing HCT15 and HT29 colon cancer xenografts. Overall, data indicate that this monoclonal antibody could be developed for a targeted therapy of colo-rectal cancers, alone or in combinatorial strategies.
Citation Information: Mol Cancer Ther 2013;12(11 Suppl):C190.
Citation Format: Alberto Grandi, Susanna Campagnoli, Matteo Parri, Elisa De Camilli, Ilaria Naldi, Lisa Gherardini, Caterina Cinti, Luigi Terracciano, Boquan Jin, Paolo Sarmientos, Giuseppe Viale, Guido Grandi, Piero Pileri, Renata Maria Grifantini. A novel monoclonal antibody for colon cancer therapy. [abstract]. In: Proceedings of the AACR-NCI-EORTC International Conference: Molecular Targets and Cancer Therapeutics; 2013 Oct 19-23; Boston, MA. Philadelphia (PA): AACR; Mol Cancer Ther 2013;12(11 Suppl):Abstract nr C190.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Boquan Jin
- 5The Fourth Military Medical University, Xi'an, China
| | | | | | - Guido Grandi
- 6Advisory Board, Externautics S.p.A. and Novartis Vaccines & Diagnostics Vaccines, Siena, Italy
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12
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Gherardini L, Gennaro M, Pizzorusso T. Perilesional treatment with chondroitinase ABC and motor training promote functional recovery after stroke in rats. Cereb Cortex 2013; 25:202-12. [PMID: 23960208 DOI: 10.1093/cercor/bht217] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Ischemic stroke insults may lead to chronic functional limitations that adversely affect patient movements. Partial motor recovery is thought to be sustained by neuronal plasticity, particularly in areas close to the lesion site. It is still unknown if treatments acting exclusively on cortical plasticity of perilesional areas could result in behavioral amelioration. We tested whether enhancing plasticity in the ipsilesional cortex using local injections of chondroitinase ABC (ChABC) could promote recovery of skilled motor function in a focal cortical ischemia of forelimb motor cortex in rats. Using the skilled reaching test, we found that acute and delayed ChABC treatment induced recovery of impaired motor skills in treated rats. vGLUT1, vGLUT2, and vGAT staining indicated that functional recovery after acute ChABC treatment was associated with local plastic modification of the excitatory cortical circuitry positive for VGLUT2. ChABC effects on vGLUT2 staining were present only in rats undergoing behavioral training. Thus, the combination of treatments targeting the CSPG component of the extracellular matrix in perilesional areas and rehabilitation could be sufficient to enhance functional recovery from a focal stroke.
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Affiliation(s)
- Lisa Gherardini
- Institute of Neuroscience, CNR, Pisa 56124, Italy, Institute of Clinical Physiology, CNR, Siena 53100, Italy and
| | | | - Tommaso Pizzorusso
- Institute of Neuroscience, CNR, Pisa 56124, Italy, NEUROFARBA Dept, University of Florence, Florence 50135, Italy
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Albertazzi L, Gherardini L, Brondi M, Sulis Sato S, Bifone A, Pizzorusso T, Ratto GM, Bardi G. In Vivo Distribution and Toxicity of PAMAM Dendrimers in the Central Nervous System Depend on Their Surface Chemistry. Mol Pharm 2012; 10:249-60. [DOI: 10.1021/mp300391v] [Citation(s) in RCA: 136] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Lorenzo Albertazzi
- Center for Nanotechnology Innovation
@NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127
Pisa, Italy
- Laboratorio
NEST, Scuola Normale
Superiore, Piazza San Silvestro 12, 56127 Pisa, Italy
| | - Lisa Gherardini
- Institute of Neuroscience—CNR,
Via Moruzzi 1, 56124 Pisa, Italy
- Institute of Clinical Physiology—CNR,
Via Fiorentina 1, 53100 Siena, Italy
| | - Marco Brondi
- Center for Nanotechnology Innovation
@NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127
Pisa, Italy
- Laboratorio
NEST, Scuola Normale
Superiore, Piazza San Silvestro 12, 56127 Pisa, Italy
| | - Sebastian Sulis Sato
- Center for Nanotechnology Innovation
@NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127
Pisa, Italy
- Laboratorio
NEST, Scuola Normale
Superiore, Piazza San Silvestro 12, 56127 Pisa, Italy
| | - Angelo Bifone
- Center for Nanotechnology Innovation
@NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127
Pisa, Italy
| | - Tommaso Pizzorusso
- Institute of Neuroscience—CNR,
Via Moruzzi 1, 56124 Pisa, Italy
- Department of Psychology, University
of Florence, Via di San Niccolò, 89a-95 50125 Florence, Italy
| | - Gian Michele Ratto
- Laboratorio
NEST, Scuola Normale
Superiore, Piazza San Silvestro 12, 56127 Pisa, Italy
- Institute of Nanoscience—CNR,
Piazza San Silvestro 12, 56127 Pisa, Italy
| | - Giuseppe Bardi
- Center for Nanotechnology Innovation
@NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127
Pisa, Italy
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Nunes A, Bussy C, Gherardini L, Meneghetti M, Herrero MA, Bianco A, Prato M, Pizzorusso T, Al-Jamal KT, Kostarelos K. In vivo degradation of functionalized carbon nanotubes after stereotactic administration in the brain cortex. Nanomedicine (Lond) 2012; 7:1485-94. [DOI: 10.2217/nnm.12.33] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: Carbon nanotubes (CNTs) are increasingly being utilized in neurological applications as components of implants, electrodes or as delivery vehicles. Any application that involves implantation or injection of CNTs into the CNS needs to address the distribution and fate of the material following interaction and residence within the neuronal tissue. Here we report a preliminary study investigating the fate and structural integrity of amino-functionalized CNTs following stereotactic administration in the brain cortex. Materials & methods: The CNTs investigated had previously shown the capacity to internalize in various cell types of the CNS. An aqueous suspension of multiwalled CNT-NH3 + was stereotactically injected into the mouse brain cortex. Their interaction with neural cells and consequent effects on the CNT structural integrity was investigated by optical, transmission electron microscopy and Raman spectroscopy of brain tissue sections for a period between 2 and 14 days post cortical administration. Results & discussion: The occurrence of severe nanotube structure deformation leading to partial degradation of the chemically functionalized-multiwalled CNT-NH3 + in vivo following internalization within microglia was revealed even at early time points. Such initial observations of CNT degradation within the brain tissue render further systematic investigations using high-resolution tools imperative. Original submitted 20 October 2011; Revised submitted 19 February 2012; Published online 19 June 2012
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Affiliation(s)
- Antonio Nunes
- Nanomedicine Laboratory, Centre for Drug Delivery Research, UCL School of Pharmacy, University College London, WC1N 1AX, UK
| | - Cyrill Bussy
- Nanomedicine Laboratory, Centre for Drug Delivery Research, UCL School of Pharmacy, University College London, WC1N 1AX, UK
| | - Lisa Gherardini
- Institute of Neuroscience, Via G. Moruzzi 1, Pisa 56100, Italy
- CNR Institute of Clinical Physiology, Via Fiorentina 1, Siena 53100, Italy
| | - Moreno Meneghetti
- Department of Chemical Sciences, University of Padua, Via Marzolo 1, I-I-35131 Padua, Italy
| | | | - Alberto Bianco
- CNRS, Institut de Biologie Moléculaire et Cellulaire, Immunologie et Chimie Thérapeutiques, 67000 Strasbourg, France
| | - Maurizio Prato
- Department of Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Tommaso Pizzorusso
- Institute of Neuroscience, Via G. Moruzzi 1, Pisa 56100, Italy
- Department of Psychology, University of Florence, Area San Salvi, Padiglione 26, Florence 50100, Italy
| | - Khuloud T Al-Jamal
- Nanomedicine Laboratory, Centre for Drug Delivery Research, UCL School of Pharmacy, University College London, WC1N 1AX, UK
| | - Kostas Kostarelos
- Nanomedicine Laboratory, Centre for Drug Delivery Research, UCL School of Pharmacy, University College London, WC1N 1AX, UK
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Gennaro M, Gherardini L, Fiori S, Guzzetta A, Berardi N, Pizzorusso T, Cioni G. Development of a rodent model of perinatal stroke: Focus on motor recovery. Int J Psychophysiol 2012. [DOI: 10.1016/j.ijpsycho.2012.06.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Raffa V, Gherardini L, Vittorio O, Bardi G, Ziaei A, Pizzorusso T, Riggio C, Nitodas S, Karachalios T, Al-Jamal KT, Kostarelos K, Costa M, Cuschieri A. Carbon nanotube-mediated wireless cell permeabilization: drug and gene uptake. Nanomedicine (Lond) 2011; 6:1709-18. [DOI: 10.2217/nnm.11.62] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: This work aims to exploit the ‘antenna’ properties of multiwalled carbon nanotubes (MWCNTs). They can be used to induce cell permeabilization in order to transfer drugs (normally impermeable to cell membranes) both in in vitro and in vivo models. Material & Methods: The performance of the MWCNTs as receiver antenna was modeled by finite element modeling. Once the appropriate field has been identified, the antenna properties of MWCNTs were investigated in sequential experiments involving immortalized fibroblast cell line (drug model: doxorubicin chemothererapeutic agent) and living mice (drug model: bcl-2 antiapoptotic gene) following stereotactic injection in the cerebral motor cortex. Results: Finite element modeling analysis predicts that our MWCNTs irradiated in the radiofrequency field resemble thin-wire dipole antennas. In vitro experiments confirmed that combination of MWCNTs and electromagnetic field treatment dramatically favors intracellular drug uptake and, most importantly, drug nuclear localization. Finally, the brain of each irradiated animal exhibits a significantly higher number of transfected cells compared with the appropriate controls. Conclusion: This wireless application has the potential for MWCNT-based intracellular drug delivery and electro-stimulation therapies.
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Affiliation(s)
- Vittoria Raffa
- Medical Science Lab, Scuola Superiore Sant’Anna, Pisa, 56127, Italy
| | | | - Orazio Vittorio
- Medical Science Lab, Scuola Superiore Sant’Anna, Pisa, 56127, Italy
| | - Giuseppe Bardi
- Center for Nanotechnology Innovation @ NEST, Istituto Italiano di Tecnologia, Pisa, Italy
| | - Afshin Ziaei
- Thales Research & Technology France, Palaiseau cedex, F-91767, France
| | | | - Cristina Riggio
- Medical Science Lab, Scuola Superiore Sant’Anna, Pisa, 56127, Italy
| | | | | | | | | | | | - Alfred Cuschieri
- Medical Science Lab, Scuola Superiore Sant’Anna, Pisa, 56127, Italy
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Al-Jamal KT, Gherardini L, Bardi G, Nunes A, Guo C, Bussy C, Herrero MA, Bianco A, Prato M, Kostarelos K, Pizzorusso T. Functional motor recovery from brain ischemic insult by carbon nanotube-mediated siRNA silencing. Proc Natl Acad Sci U S A 2011; 108:10952-7. [PMID: 21690348 PMCID: PMC3131324 DOI: 10.1073/pnas.1100930108] [Citation(s) in RCA: 187] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Stroke is the second cause of death worldwide with ischemic stroke accounting for 80% of all stroke insults. Caspase-3 activation contributes to brain tissue loss and downstream biochemical events that lead to programmed cell death after traumatic brain injury. Alleviation of symptoms following ischemic neuronal injury can be potentially achieved by either genetic disruption or pharmacological inhibition of caspases. Here, we studied whether silencing of Caspase-3 using carbon nanotube-mediated in vivo RNA interference (RNAi) could offer a therapeutic opportunity against stroke. Effective delivery of siRNA directly to the CNS has been shown to normalize phenotypes in animal models of several neurological diseases. It is shown here that peri-lesional stereotactic administration of a Caspase-3 siRNA (siCas 3) delivered by functionalized carbon nanotubes (f-CNT) reduced neurodegeneration and promoted functional preservation before and after focal ischemic damage of the rodent motor cortex using an endothelin-1 induced stroke model. These observations illustrate the opportunity offered by carbon nanotube-mediated siRNA delivery and gene silencing of neuronal tissue applicable to a variety of different neuropathological conditions where intervention at well localized brain foci may offer therapeutic and functional benefits.
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Affiliation(s)
- Khuloud T. Al-Jamal
- Nanomedicine Laboratory, Center for Drug Delivery Research, School of Pharmacy, University of London, London WC1N 1AX, United Kingdom
- Institute of Pharmaceutical Science, King’s College London, Franklin-Wilkins Building, London SE1 9NH, United Kingdom
| | - Lisa Gherardini
- Consiglio Nazionale delle Ricerche Neuroscience Institute, Pisa Area della recerca Via G. Moruzzi 1, 56100 Pisa, Italy
| | - Giuseppe Bardi
- Consiglio Nazionale delle Ricerche Neuroscience Institute, Pisa Area della recerca Via G. Moruzzi 1, 56100 Pisa, Italy
| | - Antonio Nunes
- Nanomedicine Laboratory, Center for Drug Delivery Research, School of Pharmacy, University of London, London WC1N 1AX, United Kingdom
| | - Chang Guo
- Nanomedicine Laboratory, Center for Drug Delivery Research, School of Pharmacy, University of London, London WC1N 1AX, United Kingdom
| | - Cyrill Bussy
- Nanomedicine Laboratory, Center for Drug Delivery Research, School of Pharmacy, University of London, London WC1N 1AX, United Kingdom
| | - M. Antonia Herrero
- Departamento de Química Orgánica, Facultad de Química-IRICA, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
| | - Alberto Bianco
- CNRS, Institut de Biologie Moléculaire et Cellulaire, UPR 9021 Immunologie et Chimie Thérapeutiques, 67000 Strasbourg, France
| | - Maurizio Prato
- Department of Pharmaceutical Sciences, Center of Excellence for Nanostructured Materials, University of Trieste, Piazzale Europa 1, 34127 Trieste, Italy
| | - Kostas Kostarelos
- Nanomedicine Laboratory, Center for Drug Delivery Research, School of Pharmacy, University of London, London WC1N 1AX, United Kingdom
| | - Tommaso Pizzorusso
- Consiglio Nazionale delle Ricerche Neuroscience Institute, Pisa Area della recerca Via G. Moruzzi 1, 56100 Pisa, Italy
- Department of Psychology, University of Florence, Area San Salvi, 50135 Firenze, Italy; and
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Leo L, Gherardini L, Barone V, De Fusco M, Pietrobon D, Pizzorusso T, Casari G. Increased susceptibility to cortical spreading depression in the mouse model of familial hemiplegic migraine type 2. PLoS Genet 2011; 7:e1002129. [PMID: 21731499 PMCID: PMC3121757 DOI: 10.1371/journal.pgen.1002129] [Citation(s) in RCA: 150] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Accepted: 04/30/2011] [Indexed: 11/18/2022] Open
Abstract
Familial hemiplegic migraine type 2 (FHM2) is an autosomal dominant form of migraine with aura that is caused by mutations of the α2-subunit of the Na,K-ATPase, an isoform almost exclusively expressed in astrocytes in the adult brain. We generated the first FHM2 knock-in mouse model carrying the human W887R mutation in the Atp1a2 orthologous gene. Homozygous Atp1a2R887/R887 mutants died just after birth, while heterozygous Atp1a2+/R887 mice showed no apparent clinical phenotype. The mutant α2 Na,K-ATPase protein was barely detectable in the brain of homozygous mutants and strongly reduced in the brain of heterozygous mutants, likely as a consequence of endoplasmic reticulum retention and subsequent proteasomal degradation, as we demonstrate in transfected cells. In vivo analysis of cortical spreading depression (CSD), the phenomenon underlying migraine aura, revealed a decreased induction threshold and an increased velocity of propagation in the heterozygous FHM2 mouse. Since several lines of evidence involve a specific role of the glial α2 Na,K pump in active reuptake of glutamate from the synaptic cleft, we hypothesize that CSD facilitation in the FHM2 mouse model is sustained by inefficient glutamate clearance by astrocytes and consequent increased cortical excitatory neurotransmission. The demonstration that FHM2 and FHM1 mutations share the ability to facilitate induction and propagation of CSD in mouse models further support the role of CSD as a key migraine trigger. We previously reported that mutations of the α2 subunit of the Na,K-ATPase cause familial hemiplegic migraine type 2 (FHM2), a dominant form of migraine with aura. This paper describes the first animal model of FHM2 and represents the further proceeding in this disease investigation. Homozygous knock-in mutant mice die just after birth, while heterozygous mice show no apparent clinical phenotype. However, in vivo analysis revealed a marked facilitation of cortical spreading depression (CSD), the phenomenon underlying migraine aura. Given the evidence for specific functional coupling between the glial α2 Na,K pump and glutamate transporters, we hypothesize that CSD facilitation in the FHM2 mouse model is sustained by inefficient glutamate clearance by astrocytes and consequent increased cortical excitatory neurotransmission. We finally propose this FHM2 mouse as a valuable in vivo model to investigate migraine mechanisms and, possibly, treatments.
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Affiliation(s)
- Loredana Leo
- Vita-Salute San Raffaele University and Center for Translational Genomics and Bioinformatics, San Raffaele Scientific Institute, Milan, Italy
- Italian Institute of Technology (IIT), Genoa, Italy
| | | | - Virginia Barone
- Vita-Salute San Raffaele University and Center for Translational Genomics and Bioinformatics, San Raffaele Scientific Institute, Milan, Italy
| | - Maurizio De Fusco
- Vita-Salute San Raffaele University and Center for Translational Genomics and Bioinformatics, San Raffaele Scientific Institute, Milan, Italy
| | - Daniela Pietrobon
- Department of Biomedical Sciences, University of Padua and CNR Institute of Neuroscience, Padua, Italy
| | - Tommaso Pizzorusso
- CNR Institute of Neuroscience, Pisa, Italy
- Department of Psychology, University of Florence, Florence, Italy
| | - Giorgio Casari
- Vita-Salute San Raffaele University and Center for Translational Genomics and Bioinformatics, San Raffaele Scientific Institute, Milan, Italy
- * E-mail:
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van den Maagdenberg AMJM, Pizzorusso T, Kaja S, Terpolilli N, Shapovalova M, Hoebeek FE, Barrett CF, Gherardini L, van de Ven RCG, Todorov B, Broos LAM, Tottene A, Gao Z, Fodor M, De Zeeuw CI, Frants RR, Plesnila N, Plomp JJ, Pietrobon D, Ferrari MD. High cortical spreading depression susceptibility and migraine-associated symptoms in Ca(v)2.1 S218L mice. Ann Neurol 2010; 67:85-98. [PMID: 20186955 DOI: 10.1002/ana.21815] [Citation(s) in RCA: 168] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE The CACNA1A gene encodes the pore-forming subunit of neuronal Ca(V)2.1 Ca2+ channels. In patients, the S218L CACNA1A mutation causes a dramatic hemiplegic migraine syndrome that is associated with ataxia, seizures, and severe, sometimes fatal, brain edema often triggered by only a mild head trauma. METHODS We introduced the S218L mutation into the mouse Cacna1a gene and studied the mechanisms for the S218L syndrome by analyzing the phenotypic, molecular, and electrophysiological consequences. RESULTS Cacna1a(S218L) mice faithfully mimic the associated clinical features of the human S218L syndrome. S218L neurons exhibit a gene dosage-dependent negative shift in voltage dependence of Ca(V)2.1 channel activation, resulting in enhanced neurotransmitter release at the neuromuscular junction. Cacna1a(S218L) mice also display an exquisite sensitivity to cortical spreading depression (CSD), with a vastly reduced triggering threshold, an increased propagation velocity, and frequently multiple CSD events after a single stimulus. In contrast, mice bearing the R192Q CACNA1A mutation, which in humans causes a milder form of hemiplegic migraine, typically exhibit only a single CSD event after one triggering stimulus. INTERPRETATION The particularly low CSD threshold and the strong tendency to respond with multiple CSD events make the S218L cortex highly vulnerable to weak stimuli and may provide a mechanistic basis for the dramatic phenotype seen in S218L mice and patients. Thus, the S218L mouse model may prove a valuable tool to further elucidate mechanisms underlying migraine, seizures, ataxia, and trauma-triggered cerebral edema.
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Devcic-Kuhar B, Pfaffenberger S, Gherardini L, Mayer C, Gröschl M, Kaun C, Benes E, Tschachler E, Huber K, Maurer G, Wojta J, Gottsauner-Wolf M. Ultrasound affects distribution of plasminogen and tissue-type plasminogen activator in whole blood clots in vitro. Thromb Haemost 2005; 92:980-5. [PMID: 15543323 DOI: 10.1160/th04-02-0119] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Ultrasound of 2 MHz frequency and 1.2 W/cm(2) acoustic intensity was applied to examine the effect of sonication on recombinant tissue-type plasminogen activator (rt-PA)-induced thrombolysis as well as on the distribution of plasminogen and t-PA within whole blood clots in vitro. Thrombolysis was evaluated quantitatively by measuring clot weight reduction and the level of fibrin degradation product D-dimer (FDP-DD) in the supernatant. Weight reduction in the group of clots treated both with ultrasound and rt-PA was 35.2% +/-6.9% which is significantly higher (p<0.0001) than in the group of clots treated with rt-PA only (19.9% +/-4.3%). FDP-DD level in the supernatants of the group treated with ultrasound and rt-PA increased sevenfold compared to the group treated with rt-PA alone, (14895 +/-2513 ng/ml vs. 2364 +/-725 ng/ml). Localization of fibrinolytic components within the clots was accomplished by using gel-entrapping technique and immunohistochemistry. Spatial distributions of t-PA and plasminogen showed clearly that ultrasound promoted the penetration of rt-PA into thrombi significantly (p<0.0001), and broadened the zone of lysis from 8.9 +/-2.6 microm to 21.2 +/-7.2 microm. We speculate that ultrasound enhances thrombolysis by affecting the distribution of rt-PA within the clot.
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Gherardini L, Cousins CM, Hawkes JJ, Spengler J, Radel S, Lawler H, Devcic-Kuhar B, Gröschl M, Coakley WT, McLoughlin AJ. A new immobilisation method to arrange particles in a gel matrix by ultrasound standing waves. Ultrasound Med Biol 2005; 31:261-72. [PMID: 15708466 DOI: 10.1016/j.ultrasmedbio.2004.10.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2004] [Revised: 10/04/2004] [Accepted: 10/14/2004] [Indexed: 05/13/2023]
Abstract
Ultrasonic forces may be used to manipulate particles in suspension. For example, a standing wave ultrasound (US) field applied to a suspension moves the particles toward areas of minimal acoustic pressure, where they are orderly retained creating a predictable heterogeneous distribution. This principle of ultrasonic retention of particles or cells has been applied in numerous biotechnological applications, such as mammalian cell filtering and red blood cell sedimentation. Here, a new US-based cell immobilisation technique is described that allows manipulation and positioning of cells/particles within various nontoxic gel matrices before polymerisation. Specifically, gel immobilisation was used to directly demonstrate that the viability of yeast cells arranged by an US standing wave is maintained up to 4 days after treatment. The versatility of this immobilisation method was validated using a wide range of acoustic devices. Finally, the potential biotechnological advantages of this US-controlled particle positioning method combined with gel immobilisation/encapsulation technology are discussed.
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Affiliation(s)
- Lisa Gherardini
- Department of Industrial Microbiology, University College Dublin, Belfield, Dublin, Ireland
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22
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Gherardini L, Radel S, Sielemann S, Doblhoff-Dier O, Gröschl M, Benes E, McLoughlin AJ. A study of the spatial organisation of microbial cells in a gel matrix subjected to treatment with ultrasound standing waves. Bioseparation 2002; 10:153-62. [PMID: 12233739 DOI: 10.1023/a:1016311410219] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Retention and manipulation of microbial cells through exploitation of ultrasonic forces has been reported as a novel cell immobilisation technique. The spatial ordering of yeast cells, within suspensions subjected to an ultrasonic standing wave field, was analysed for the first time. A technique, based on 'freezing' the spatial arrangement using polymer gelation was developed. The resultant gel was then sectioned and examined using microscopic techniques. Light Microscopy confirmed the presence of specific regions in the ultrasonic field, where the cells are organised into bands corresponding to the standing waves' pressure nodal planes. Computer Image Analysis measurement of several physical parameters associated with this cell distribution matched the values derived from the theoretical model. The spatial cell-cell re-arrangement within each band and uneven distribution along the nodal planes have been analysed by Scanning Electron Microscopy. These results complement the ongoing study of the process of immobilisation of microbial cells by ultrasound standing waves.
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Affiliation(s)
- L Gherardini
- Institute of Applied Microbiology, University of Agricultural Sciences, Vienna, Austria.
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23
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Carta A, Sanna P, Gherardini L, Usai D, Zanetti S. Novel functionalized pyrido[2,3-g]quinoxalinones as antibacterial, antifungal and anticancer agents. Farmaco 2001; 56:933-8. [PMID: 11829113 DOI: 10.1016/s0014-827x(01)01161-2] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of twelve novel pyrido[2,3-g]quinoxalinones (3-14), variously substituted at the C-3 position, was synthesized, structurally determined and submitted to a preliminary in vitro evaluation for antibacterial, anticandida and anticancer activities. Results of the antimicrobial screening showed that all compounds, with the exception of 6, 11 and 12, exhibited interesting activity against all strains tested; while compound 10 was found to have encouraging in vitro anticancer activity at a concentration of l0(-4) M.
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Affiliation(s)
- A Carta
- Dipartimento Farmaco Chimico Tossicologico, Sassari, Italy
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24
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Pinna GA, Pirisi MA, Grella GE, Gherardini L, Mussinu JM, Paglietti G, Ferrari AM, Rastelli G. Synthesis and cytotoxicity of bis(benzo[g]indole-3-carboxamides) and related compounds. Arch Pharm (Weinheim) 2001; 334:337-44. [PMID: 11822170 DOI: 10.1002/1521-4184(200112)334:11<337::aid-ardp337>3.0.co;2-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A series of bis(benzo[g]indoles) bridged by CX-(CH2)nN(Me)(CH2)n-CX (X = O, S, H2; n = 2,3) was synthesized as bifunctional antitumor agents and evaluated for cytotoxic activity against diverse human cancer cell lines by the National Cancer Institute. The parent compounds 2a,b exhibited a good level of activity and derivates 2c-g,i,k demonstrated significant inhibitory effects, all with IC50 values in the low micromolar range. The thioamide analogue 2j showed less potency. It is interesting to note that introduction of substituents on the benzene ring of the benzo[g]indole portion of 2a,b did not affect activity, with the only exception of the 7,8-dichloro derivative 2h which became less potent. One member of this series, 2i, was then tested in the hollow fiber cell assay to evaluate, in a preliminary fashion, its in vivo antineoplastic activity. Molecular modelling studies were performed on amide 2a and thioamide 2j to explain the loss of activity of 2j as to 2a. Finally, compound 2a behaved as a typical DNA intercalating agent, as judged from viscosity measurements with Poly(dA-dT)...poly(dA-dT).
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Affiliation(s)
- G A Pinna
- Dipartimento Farmaco Chimico Tossicologico, Università di Sassari, Via Muroni 23/A, 07100 Sassari, Italy.
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25
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Radel S, Gherardini L, McLoughlin AJ, Doblhoff-Dier O, Benes E. Breakdown of immobilisation/separation and morphology changes of yeast suspended in water-rich ethanol mixtures exposed to ultrasonic plane standing waves. Bioseparation 2001; 9:369-77. [PMID: 11518240 DOI: 10.1023/a:1011158019835] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Some physiological/morphological changes have been reported before, when suspended yeasts have been irradiated with well-defined ultrasonic standing, as well as propagating, plane waves around 2.2 MHz, as used in ultrasonic coagulation, e.g., for cell filtering. Thus we used yeast as a biological model to explore the reasons for both those morphology changes and some unusual macroscopic behaviour in the case of water-rich ethanol mixtures when used as carrier liquid. When the cells were suspended in 12% (v/v) ethanol-water mixture separation was greatly reduced; the yeast cells were not retained in the pressure nodal planes of the standing wave, but mixed turbulently through the separation system. How this behaviour alters the efficiency of retention/immobilisation was measured. As the viability of the yeast was decreased as well the morphology of the cells was examined using transmission electron microscopy. Two effects, according to the type of assessment, were evident; a disruption of the cells vacuole and also damage to the cell wall/membrane complex. The extent of the alterations in vacuole structure with sonication time, utilising a fluorescent vacuole membrane dye, was measured. Transient cavitation was not detected and thus could be excluded as being responsible for the observed effects. Other possible reasons for the disruption of the intracellular compartments may be acoustic pressure, displacement or other, secondary effects like (sub) harmonic cavitation. The investigations contribute to a better understanding of the physical conditions experienced when a cell is stressed in a high-frequency ultrasonic wave in the MHz range.
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Affiliation(s)
- S Radel
- University College Dublin, Department of Industrial Microbiology, Dublin, Ireland.
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26
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Gherardini L, Comninellis C, Vatistas N. Electrochemical oxidation of para-chlorophenol on Ti/SnO2-PbO2 electrodes: introduction of a parameter for the estimation of their efficiency. Ann Chim 2001; 91:161-8. [PMID: 11381540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
To oxidate otherwise non-biodegradable organic pollutants as chlorophenol has recently been proposed the promising electro-combustion technique. We considered two different types of electrodic material: boron doped diamond (BDD) and lead dioxide electro-deposited on a Ti/SnO2 substrate and we investigated differences between them in terms of organics oxidation efficiency. In the batch system we utilised for the combustion, the experimental parameters we investigated, initial concentration of the organic compound, temperature and current density furnished to the system--showed us that a parameter like the Instantaneous Current Efficiency (ICE) is affected by mass-transfer limitation at the end of the tests. In this paper we therefore introduce a new parameter not influenced by these problems that can be very effective for the description of electrode efficiency during the conduction of experiences.
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Affiliation(s)
- L Gherardini
- Chemical Engineering Department, University of Pisa, Via Diotisalvi, 2, 56126 Pisa, Italy
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27
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Radel S, McLoughlin AJ, Gherardini L, Doblhoff-Dier O, Benes E. Viability of yeast cells in well controlled propagating and standing ultrasonic plane waves. Ultrasonics 2000; 38:633-7. [PMID: 10829741 DOI: 10.1016/s0041-624x(99)00211-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Recent studies have shown that there is no loss of cell viability when the cells are subjected to ultrasonic standing wave fields in acoustic cell retention systems. These systems are characterised by waves that spatially vary in pressure amplitude in the direction of sound propagation. In this work an anechoic 'one-dimensional' sonication chamber has been developed that produces propagating waves, which differ from standing waves in that the pressure amplitude remains constant as the wave travels in a medium with negligible attenuation. The viability of yeast cell suspensions as a function of treatment time was investigated during exposure to both standing and propagating wave fields with frequencies slightly above 2 MHz. The influence of 12% (vol/vol) of ethanol in water on the spatial arrangement of the cells in suspension was also studied. Changes in yeast cell morphology caused by the different types of suspension media and the ultrasonic treatment were examined by transmission electron microscopy (TEM). The agglomeration of yeast cells within the pressure nodal planes appears to minimise damaging effects due to ultrasonic fields.
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Affiliation(s)
- S Radel
- Department of Industrial Microbiology, University College Dublin, Ireland.
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28
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Samouillan V, Dandurand-Lods J, Lamure A, Maurel E, Lacabanne C, Gerosa G, Venturini A, Casarotto D, Gherardini L, Spina M. Thermal analysis characterization of aortic tissues for cardiac valve bioprostheses. J Biomed Mater Res 1999; 46:531-8. [PMID: 10398014 DOI: 10.1002/(sici)1097-4636(19990915)46:4<531::aid-jbm11>3.0.co;2-2] [Citation(s) in RCA: 92] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Two multistep extractions were achieved on porcine aortic tissues to obtain acellular matrices used for cardiac bioprostheses. The evaluation of structural modifications and the possible damage of extracellular matrix fibrous proteins were investigated by means of thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Protein-water interactions and degradation temperatures were determined by TGA. DSC was used to characterize protein thermal transitions (glass transition and denaturation), which provided information on the dynamic structure of the aortic tissue components. Sodium dodecyl sulfate (SDS) extraction had a destructuring effect, while Triton and cholate treatments did not affect the structural integrity of either elastin and collagen. A DSC comparison showed that SDS destabilizes the collagen triple helical domain and swells the elastin network.
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Affiliation(s)
- V Samouillan
- Laboratoire de Physique des Polymères, Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex, France
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