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Belvedere R, Novizio N, Eletto D, Porta A, Di Maio U, Petrella A. The Protecting Activity of RIPACUT ®: A New Therapeutic Approach Preserving Epithelial Health Based on the Combination of Iceland Lichen Extract, Silver Salt, and Sodium Hyaluronate. Life (Basel) 2023; 13:life13051088. [PMID: 37240732 DOI: 10.3390/life13051088] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/14/2023] [Accepted: 04/24/2023] [Indexed: 05/28/2023] Open
Abstract
Epithelial integrity and function must be maintained in a dynamic healthy equilibrium, keeping unaltered the oxidative and inflammatory conditions and the microbiome of the cutaneous layers. Beside the skin, other mucous membranes can be injured, such as the nasal and anal ones, because of the contact with the external environment. Here, we detected the effects of RIPACUT®, a combination of Iceland lichen extract, silver salt and sodium hyaluronate that individually act in diverse biological ways. The findings we obtained on keratinocytes, nasal and intestinal epithelial cells reveal that this combination showed a marked antioxidant activity, further assessed by the DPPH assay. Additionally, by analyzing the release of the IL-1β, TNF-α and IL-6 cytokines, we proved the anti-inflammatory effect of RIPACUT®. In both cases, the main preserving action was due to Iceland lichen. We also observed a notable antimicrobial activity mediated by the silver compound. These data suggest that RIPACUT® could signify the basis for an attractive pharmacological approach to maintaining healthy epithelial conditions. Interestingly, this may be extended to the nasal and anal areas where it protects against oxidative, inflammatory and infectious insults. Thus, these outcomes encourage the creation of sprays or creams for which sodium hyaluronate can guarantee a surface film-forming effect.
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Affiliation(s)
- Raffaella Belvedere
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| | - Nunzia Novizio
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| | - Daniela Eletto
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| | - Amalia Porta
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| | - Umberto Di Maio
- Shedir Pharma Group Spa, Via Bagnulo 95, 80063 Piano di Sorrento, Italy
| | - Antonello Petrella
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy
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Nocera R, Eletto D, Santoro V, Parisi V, Bellone ML, Izzo M, Tosco A, Dal Piaz F, Donadio G, De Tommasi N. Design of an Herbal Preparation Composed by a Combination of Ruscus aculeatus L. and Vitis vinifera L. Extracts, Magnolol and Diosmetin to Address Chronic Venous Diseases through an Anti-Inflammatory Effect and AP-1 Modulation. Plants (Basel) 2023; 12:1051. [PMID: 36903912 PMCID: PMC10004780 DOI: 10.3390/plants12051051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 02/10/2023] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
Chronic venous disease (CVD) is an often underestimated inflammatory pathological condition that can have a serious impact on quality of life. Many therapies have been proposed to deal with CVD, but unfortunately the symptoms recur with increasing frequency and intensity as soon as treatments are stopped. Previous studies have shown that the common inflammatory transcription factor AP-1 (activator protein-1) and nuclear factor kappa-activated B-cell light chain enhancer (NF-kB) play key roles in the initiation and progression of this vascular dysfunction. The aim of this research was to develop a herbal product that acts simultaneously on different aspects of CVD-related inflammation. Based on the evidence that several natural components of plant origin are used to treat venous insufficiency and that magnolol has been suggested as a putative modulator of AP-1, two herbal preparations based on Ruscus aculeatus root extracts, and Vitis vinifera seed extracts, as well as diosmetin and magnolol, were established. A preliminary MTT-based evaluation of the possible cytotoxic effects of these preparations led to the selection of one of them, named DMRV-2, for further investigation. First, the anti-inflammatory efficacy of DMRV-2 was demonstrated by monitoring its ability to reduce cytokine secretion from endothelial cells subjected to LPS-induced inflammation. Furthermore, using a real-time PCR-based protocol, the effect of DMRV-2 on AP-1 expression and activity was also evaluated; the results obtained demonstrated that the incubation of the endothelial cells with this preparation almost completely nullified the effects exerted by the treatment with LPS on AP-1. Similar results were also obtained for NF-kB, whose activation was evaluated by monitoring its distribution between the cytosol and the nucleus of endothelial cells after the different treatments.
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Affiliation(s)
- Raffaella Nocera
- Ph.D. Program in Drug Discovery & Development, Università degli Studi di Salerno, 84084 Fisciano, Italy
| | - Daniela Eletto
- Department of Pharmacy, Università degli Studi di Salerno, 84084 Fisciano, Italy
| | - Valentina Santoro
- Department of Pharmacy, Università degli Studi di Salerno, 84084 Fisciano, Italy
| | - Valentina Parisi
- Ph.D. Program in Drug Discovery & Development, Università degli Studi di Salerno, 84084 Fisciano, Italy
| | - Maria Laura Bellone
- Ph.D. Program in Drug Discovery & Development, Università degli Studi di Salerno, 84084 Fisciano, Italy
| | - Marcello Izzo
- Department of Medicine and Surgery, Univesità degli Studi di Ferrara, 44121 Ferrara, Italy
| | - Alessandra Tosco
- Department of Pharmacy, Università degli Studi di Salerno, 84084 Fisciano, Italy
| | - Fabrizio Dal Piaz
- Department of Medicine, Surgery and Dentistry, Università degli Studi di Salerno, 84081 Baronissi, Italy
| | - Giuliana Donadio
- Department of Pharmacy, Università degli Studi di Salerno, 84084 Fisciano, Italy
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Sessa L, Concilio S, Fominaya J, Eletto D, Piotto S, Busquets X. A new serotonin 2A receptor antagonist with potential benefits in Non-Alcoholic Fatty Liver Disease. Life Sci 2023; 314:121315. [PMID: 36581095 DOI: 10.1016/j.lfs.2022.121315] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 12/16/2022] [Accepted: 12/18/2022] [Indexed: 12/28/2022]
Abstract
Peripheral 5-hydroxytryptamine 2A receptor (5-HT2AR) could be a new pharmacological target for NASH, an evolution of NAFLD characterized by hepatic steatosis, cytoskeletal alterations, and hepatic inflammation that can arise with or without fibrosis. SJT4a is a synthetic β-carboline antagonist for 5-HT2AR developed by SJT molecular research to treat NASH. We performed a combined in silico/in vivo study on this potential drug to elucidate its activity and possible mechanism of action. The in silico protocol compares SJT4a with four known 5-HT2AR ligands with different activities (LSD, methiothepin, zotepine, risperidone). We performed molecular docking calculations, evaluation of binding energy by AI-based methods and Molecular Dynamics simulations of the five ligand-target complexes. Moreover, we used a pseudo-semantic analysis to evaluate the potential mechanism of action of SJT4a. In silico predictions and pseudo-semantic analysis suggested antagonistic activity for SJT4a. The in silico prediction was confirmed by [3H]-5HT radioligand binding together with SJT4a competition analysis in CHO-K1 cell cultures expressing 5-HT2AR. SJT4a was then tested in vivo. We investigated the effect of 8 weeks of treatment with SJT4A on metabolic parameters, liver pathology, NAFLD activity score, and fibrosis stage in male DIO-NASH C57BL/6 J mice diet-induced obesity fed with an obesogenic diet compared with DIO-NASH and LEAN-CHOW vehicles. In our tests, SJT4a showed intense activity in diminishing the most relevant hallmarks of NASH in the DIO-NASH mice model. We proposed a possible mode of action for SJT4a based on its 5-HT2AR antagonist activity.
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Affiliation(s)
- Lucia Sessa
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II, 132, Fisciano 84084, SA, Italy; Bionam Center for Biomaterials, University of Salerno, Via Giovanni Paolo II, 132, Fisciano 84084, SA, Italy
| | - Simona Concilio
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II, 132, Fisciano 84084, SA, Italy; Bionam Center for Biomaterials, University of Salerno, Via Giovanni Paolo II, 132, Fisciano 84084, SA, Italy
| | - Jesús Fominaya
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, 07122 Palma, Spain
| | - Daniela Eletto
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II, 132, Fisciano 84084, SA, Italy
| | - Stefano Piotto
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II, 132, Fisciano 84084, SA, Italy; Bionam Center for Biomaterials, University of Salerno, Via Giovanni Paolo II, 132, Fisciano 84084, SA, Italy.
| | - Xavier Busquets
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, 07122 Palma, Spain.
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Eletto D, Mentucci F, Vllahu M, Voli A, Petrella A, Boccellato F, Meyer TF, Porta A, Tosco A. IFNγ-dependent silencing of TFF1 during Helicobacter pylori infection. Open Biol 2022; 12:220278. [PMID: 36514982 PMCID: PMC9748780 DOI: 10.1098/rsob.220278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Chronic Helicobacter pylori infection is the leading cause of intestinal-type adenocarcinoma, as prolonged Helicobacter colonization triggers chronic active gastritis, which may evolve into adenocarcinoma of the intestinal type. In this environment, cytokines play a significant role in determining the evolution of the infection. In combination with other factors (genetic, environmental and nutritional), the pro-inflammatory response may trigger pro-oncogenic mechanisms that lead to the silencing of tumour-suppressor genes, such as trefoil factor 1 (TFF1). The latter is known to play a protective role by maintaining the gastric mucosa integrity and retaining H. pylori in the mucus layer, preventing the progression of infection and, consequently, the development of gastric cancer (GC). Since TFF1 expression is reduced during chronic Helicobacter infection with a loss of gastric mucosa protection, we investigated the molecular pathways involved in this reduction. Specifically, we evaluated the effect of some pro-inflammatory cytokines on TFF1 regulation in GC and primary gastric cells by RT-qPCR and luciferase reporter assay analyses and the repressor role of the transcription factor C/EBPβ, overexpressed in gastric-intestinal cancer. Our results show that, among several cytokines, IFNγ stimulates C/EBPβ expression, which acts as a negative regulator of TFF1 by binding its promoter at three different sites.
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Affiliation(s)
- D. Eletto
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
| | - F. Mentucci
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy,PhD Program in Drug Discovery and Development, University of Salerno, Fisciano, Salerno, Italy
| | - M. Vllahu
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
| | - A. Voli
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy,PhD Program in Drug Discovery and Development, University of Salerno, Fisciano, Salerno, Italy
| | - A. Petrella
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
| | - F. Boccellato
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - T. F. Meyer
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany,Laboratory of Infection Oncology, Institute of Clinical Molecular Biology, Christian Albrecht's University of Kiel—University Hospital Schleswig Holstein—Campus Kiel, Kiel, Germany
| | - A. Porta
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
| | - A. Tosco
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
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Conte M, Eletto D, Pannetta M, Petrone AM, Monti MC, Cassiano C, Giurato G, Rizzo F, Tessarz P, Petrella A, Tosco A, Porta A. Effects of Hst3p inhibition in Candida albicans: a genome-wide H3K56 acetylation analysis. Front Cell Infect Microbiol 2022; 12:1031814. [PMID: 36389164 PMCID: PMC9647175 DOI: 10.3389/fcimb.2022.1031814] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 10/10/2022] [Indexed: 11/30/2022] Open
Abstract
Candida spp. represent the third most frequent worldwide cause of infection in Intensive Care Units with a mortality rate of almost 40%. The classes of antifungals currently available include azoles, polyenes, echinocandins, pyrimidine derivatives, and allylamines. However, the therapeutical options for the treatment of candidiasis are drastically reduced by the increasing antifungal resistance. The growing need for a more targeted antifungal therapy is limited by the concern of finding molecules that specifically recognize the microbial cell without damaging the host. Epigenetic writers and erasers have emerged as promising targets in different contexts, including the treatment of fungal infections. In C. albicans, Hst3p, a sirtuin that deacetylates H3K56ac, represents an attractive antifungal target as it is essential for the fungus viability and virulence. Although the relevance of such epigenetic regulator is documented for the development of new antifungal therapies, the molecular mechanism behind Hst3p-mediated epigenetic regulation remains unrevealed. Here, we provide the first genome-wide profiling of H3K56ac in C. albicans resulting in H3K56ac enriched regions associated with Candida sp. pathogenicity. Upon Hst3p inhibition, 447 regions gain H3K56ac. Importantly, these genomic areas contain genes encoding for adhesin proteins, degradative enzymes, and white-opaque switching. Moreover, our RNA-seq analysis revealed 1330 upregulated and 1081 downregulated transcripts upon Hst3p inhibition, and among them, we identified 87 genes whose transcriptional increase well correlates with the enrichment of H3K56 acetylation on their promoters, including some well-known regulators of phenotypic switching and virulence. Based on our evidence, Hst3p is an appealing target for the development of new potential antifungal drugs.
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Affiliation(s)
- Marisa Conte
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
- Ph.D. Program in Drug Discovery and Development, University of Salerno, Fisciano, Salerno, Italy
| | - Daniela Eletto
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
| | - Martina Pannetta
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
- Ph.D. Program in Drug Discovery and Development, University of Salerno, Fisciano, Salerno, Italy
| | - Anna M. Petrone
- Ph.D. Program in Drug Discovery and Development, University of Salerno, Fisciano, Salerno, Italy
| | - Maria C. Monti
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
| | - Chiara Cassiano
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
- Department of Pharmacy, University of Naples ‘Federico II’, Naples, Italy
| | - Giorgio Giurato
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, Salerno, Italy
| | - Francesca Rizzo
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, Salerno, Italy
| | - Peter Tessarz
- Max Planck Research Group “Chromatin and Ageing”, Max Planck Institute for Biology of Ageing, Cologne, Germany
- Cologne Excellence Cluster on Stress Responses in Ageing-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | | | - Alessandra Tosco
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
- *Correspondence: Amalia Porta, ; Alessandra Tosco,
| | - Amalia Porta
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
- *Correspondence: Amalia Porta, ; Alessandra Tosco,
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Caruso C, Eletto D, Tosco A, Pannetta M, Scarinci F, Troisi M, Porta A. Comparative Evaluation of Antimicrobial, Antiamoebic, and Antiviral Efficacy of Ophthalmic Formulations. Microorganisms 2022; 10:microorganisms10061156. [PMID: 35744674 PMCID: PMC9229167 DOI: 10.3390/microorganisms10061156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/01/2022] [Accepted: 06/03/2022] [Indexed: 12/10/2022] Open
Abstract
The extensive use of ophthalmic antibiotics is contributing to the appearance of resistant bacterial strains, which require prolonged and massive treatments with consequent detrimental outcomes and adverse effects. In addition to these issues, antibiotics are not effective against parasites and viruses. In this context, antiseptics could be valuable alternatives. They have nonselective mechanisms of action preventing bacterial resistance and a broad spectrum of action and are also effective against parasites and viruses. Here, we compare the in vitro antibacterial, antiameobic, and antiviral activities of six ophthalmic formulations containing antiseptics such as povidone-iodine, chlorhexidine, and thymol against Gram-positive and Gram-negative bacteria, the amoeba Acanthamoeba castellanii, and two respiratory viruses, HAdV-2 and HCoV-OC43. The results suggest that, among all the tested formulations, Dropsept, consisting of Vitamin E TPGS-based (tocopheryl polyethylene glycol succinate) in combination with the antiseptic chlorhexidine, is the one with the highest range of activities, as it works efficiently against bacteria, amoeba, and viruses. On the other hand, the solution containing PVA (polyvinyl alcohol) and thymol showed a promising inhibitory effect on Pseudomonas aeruginosa, which causes severe keratitis. Given its high efficiency, Dropsept might represent a valuable alternative to the widely used antibiotics for the treatment of ocular infections. In addition to this commercial eye drop solution, thymol-based solutions might be enrolled for their natural antimicrobial and antiamoebic effect.
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Affiliation(s)
- Ciro Caruso
- Corneal Transplant Centre, Pellegrini Hospital, 80134 Naples, Italy;
| | - Daniela Eletto
- Department of Pharmacy, University of Salerno, 84084 Fisciano, Italy; (A.T.); (M.P.)
- Correspondence: (D.E.); (A.P.); Tel.: +39-089-969-421 (D.E.); +39-089-969-455 (A.P.)
| | - Alessandra Tosco
- Department of Pharmacy, University of Salerno, 84084 Fisciano, Italy; (A.T.); (M.P.)
| | - Martina Pannetta
- Department of Pharmacy, University of Salerno, 84084 Fisciano, Italy; (A.T.); (M.P.)
| | - Fabio Scarinci
- Department of Ophthalmology, IRCCS Fondazione, Bietti, Via Livenza, 3, 00198 Roma, Italy;
| | - Mario Troisi
- Department of Neurosciences, Reproductive Sciences and Dentistry, Eye Clinic, University of Naples “Federico II”, 80138 Naples, Italy;
| | - Amalia Porta
- Department of Pharmacy, University of Salerno, 84084 Fisciano, Italy; (A.T.); (M.P.)
- Correspondence: (D.E.); (A.P.); Tel.: +39-089-969-421 (D.E.); +39-089-969-455 (A.P.)
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Belvedere R, Novizio N, Eletto D, Porta A, Bagnulo A, Cerciello A, Di Maio U, Petrella A. The Procoagulant Activity of Emoxilane ®: A New Appealing Therapeutic Use in Epistaxis of the Combination of Sodium Hyaluronate, Silver Salt, α-tocopherol and D-panthenol. Life (Basel) 2021; 11:life11090992. [PMID: 34575141 PMCID: PMC8472423 DOI: 10.3390/life11090992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/17/2021] [Accepted: 09/18/2021] [Indexed: 11/20/2022] Open
Abstract
Epistaxis is one of the most frequent hemorrhages resulting from local or systemic factors. Its management without hospitalization has prompted an interest in locally applied hemostatic agents. Generally, the therapy approaches involve sprays or creams acting as a physical barrier, even used as tampons or gauze. In this study, we have investigated the activity of Emoxilane®, a combination of sodium hyaluronate, silver salt, α-tocopherol acetate and D-panthenol, which is known to be able to separately act in a different biological manner. Our in vitro results, obtained on endothelial and nasal epithelial cells, have shown that the association of these molecules presented a notable antioxidant activity mainly due to the α-tocopherol and D-panthenol and a significant antimicrobial role thanks to the silver compound. Moreover, remarkable hemostatic activity was found by evaluating plasmin inhibition attributable to the sodium hyaluronate. Interestingly, on human plasma, we have confirmed that Emoxilane® strongly induced the increase of thrombin levels. These data suggest that the use of this association could represent an appealing pharmacological approach to actively induce hemostasis during epistaxis. Our future perspective will aim to the creation of a formulation for an easy topical application in the nose which is able to contrast the bleeding.
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Affiliation(s)
- Raffaella Belvedere
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (R.B.); (N.N.); (D.E.); (A.P.)
| | - Nunzia Novizio
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (R.B.); (N.N.); (D.E.); (A.P.)
| | - Daniela Eletto
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (R.B.); (N.N.); (D.E.); (A.P.)
| | - Amalia Porta
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (R.B.); (N.N.); (D.E.); (A.P.)
| | - Antonino Bagnulo
- Neilos Srl, Via Bagnulo 95, 80063 Piano di Sorrento, Italy; (A.B.); (A.C.)
| | - Andrea Cerciello
- Neilos Srl, Via Bagnulo 95, 80063 Piano di Sorrento, Italy; (A.B.); (A.C.)
| | - Umberto Di Maio
- Shedir Pharma Group Spa, Via Bagnulo 95, 80063 Piano di Sorrento, Italy;
| | - Antonello Petrella
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (R.B.); (N.N.); (D.E.); (A.P.)
- Correspondence: ; Tel.: +39-089-969762; Fax: +39-089-969602
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Belvedere R, Pessolano E, Novizio N, Tosco A, Eletto D, Porta A, Filippelli A, Petrella F, Petrella A. The promising pro-healing role of the association of mesoglycan and lactoferrin on skin lesions. Eur J Pharm Sci 2021; 163:105886. [PMID: 34022411 DOI: 10.1016/j.ejps.2021.105886] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 05/10/2021] [Accepted: 05/14/2021] [Indexed: 11/26/2022]
Abstract
Skin wound repair represents an important topic for the therapeutic challenges. Many molecules are commonly used as active principles of topical devices to induce the correct tissue regeneration. Among these molecules, mesoglycan, a mixture of glycosaminoglycans, and the lactoferrin have recently aroused interest. Here, for the first time, we used mesoglycan/lactoferrin to treat the cell populations mainly involved in wound healing. We showed that human keratinocytes, fibroblasts and endothelial cells migrate and invade more rapidly when treated with the association. Moreover, we found that mesoglycan/lactoferrin, are able to trigger the differentiation process of keratinocytes, the switch of the fibroblasts into myofibroblasts, the acquisition of a mesenchymal phenotype for the endothelial cells which, in this way, start to form the capillary-like structures. Additionally, we proved that the well known antimicrobial behavior of lactoferrin encourages the inhibition of S. aureus and P. aeruginosa biofilm formation by the whole association, providing an appealing feature for this formulation. Finally, by the in vivo analysis, we showed that the mesoglycan/lactoferrin favors the closure of skin wounds performed on the mice back. Beside the decrease of the lesion diameters, by a confocal analysis of mice biopsies we found that the use of the association strongly promote cell activation underlying the correct tissue regeneration. These results encourage to further investigation aiming the development of a new topical patch that includes this association.
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Affiliation(s)
| | | | - Nunzia Novizio
- Department of Pharmacy, University of Salerno, Fisciano (SA) Italy
| | - Alessandra Tosco
- Department of Pharmacy, University of Salerno, Fisciano (SA) Italy
| | - Daniela Eletto
- Department of Pharmacy, University of Salerno, Fisciano (SA) Italy
| | - Amalia Porta
- Department of Pharmacy, University of Salerno, Fisciano (SA) Italy
| | - Amelia Filippelli
- Department of Medicine, Surgery and Dentistry, University of Salerno, Baronissi (SA), Italy
| | - Francesco Petrella
- Primary Care - Wound Care Service, Health Local Agency Naples 3 South, Via Libertà 42, 80055 Portici (Napoli), Italy
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Ricci D, Tutton S, Marrocco I, Ying M, Blumenthal D, Eletto D, Vargas J, Boyle S, Fazelinia H, Qian L, Suresh K, Taylor D, Paton JC, Paton AW, Tang CHA, Hu CCA, Radhakrishnan R, Gidalevitz T, Argon Y. An interdomain helix in IRE1α mediates the conformational change required for the sensor's activation. J Biol Chem 2021; 296:100781. [PMID: 34000298 PMCID: PMC8203841 DOI: 10.1016/j.jbc.2021.100781] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 03/30/2021] [Revised: 05/07/2021] [Accepted: 05/12/2021] [Indexed: 11/07/2022] Open
Abstract
The unfolded protein response plays an evolutionarily conserved role in homeostasis, and its dysregulation often leads to human disease, including diabetes and cancer. IRE1α is a major transducer that conveys endoplasmic reticulum stress via biochemical signals, yet major gaps persist in our understanding of how the detection of stress is converted to one of several molecular outcomes. It is known that, upon sensing unfolded proteins via its endoplasmic reticulum luminal domain, IRE1α dimerizes and then oligomerizes (often visualized as clustering). Once assembled, the kinase domain trans-autophosphorylates a neighboring IRE1α, inducing a conformational change that activates the RNase effector domain. However, the full details of how the signal is transmitted are not known. Here, we describe a previously unrecognized role for helix αK, located between the kinase and RNase domains of IRE1α, in conveying this critical conformational change. Using constructs containing mutations within this interdomain helix, we show that distinct substitutions affect oligomerization, kinase activity, and the RNase activity of IRE1α differentially. Furthermore, using both biochemical and computational methods, we found that different residues at position 827 specify distinct conformations at distal sites of the protein, such as in the RNase domain. Of importance, an RNase-inactive mutant, L827P, can still dimerize with wildtype monomers, but this mutation inactivates the wildtype molecule and renders leukemic cells more susceptible to stress. We surmise that helix αK is a conduit for the activation of IRE1α in response to stress.
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Affiliation(s)
- Daniela Ricci
- Division of Cell Pathology, Children's Hospital of Philadelphia and University of Pennsylvania, Civic Center Boulevard, Philadelphia, Pennsylvania, USA
| | - Stephen Tutton
- Division of Cell Pathology, Children's Hospital of Philadelphia and University of Pennsylvania, Civic Center Boulevard, Philadelphia, Pennsylvania, USA
| | - Ilaria Marrocco
- Division of Cell Pathology, Children's Hospital of Philadelphia and University of Pennsylvania, Civic Center Boulevard, Philadelphia, Pennsylvania, USA
| | - Mingjie Ying
- Department of Biology, Drexel University, Philadelphia, Pennsylvania, USA
| | - Daniel Blumenthal
- Division of Cell Pathology, Children's Hospital of Philadelphia and University of Pennsylvania, Civic Center Boulevard, Philadelphia, Pennsylvania, USA
| | - Daniela Eletto
- Division of Cell Pathology, Children's Hospital of Philadelphia and University of Pennsylvania, Civic Center Boulevard, Philadelphia, Pennsylvania, USA
| | - Jade Vargas
- Division of Cell Pathology, Children's Hospital of Philadelphia and University of Pennsylvania, Civic Center Boulevard, Philadelphia, Pennsylvania, USA
| | - Sarah Boyle
- Division of Cell Pathology, Children's Hospital of Philadelphia and University of Pennsylvania, Civic Center Boulevard, Philadelphia, Pennsylvania, USA
| | - Hossein Fazelinia
- Department of Biomedical and Health Informatics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Lei Qian
- Department of Biomedical and Health Informatics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Krishna Suresh
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Deanne Taylor
- Department of Biomedical and Health Informatics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - James C Paton
- Research Centre for Infectious Diseases, Department of Molecular and Biomedical Science, University of Adelaide, Adelaide, South Australia, Australia
| | - Adrienne W Paton
- Research Centre for Infectious Diseases, Department of Molecular and Biomedical Science, University of Adelaide, Adelaide, South Australia, Australia
| | | | | | - Ravi Radhakrishnan
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Tali Gidalevitz
- Department of Biology, Drexel University, Philadelphia, Pennsylvania, USA
| | - Yair Argon
- Division of Cell Pathology, Children's Hospital of Philadelphia and University of Pennsylvania, Civic Center Boulevard, Philadelphia, Pennsylvania, USA.
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10
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Eletto D, Vllahu M, Mentucci F, Del Gaudio P, Petrella A, Porta A, Tosco A. TFF1 Induces Aggregation and Reduces Motility of Helicobacter pylori. Int J Mol Sci 2021; 22:ijms22041851. [PMID: 33673347 PMCID: PMC7918695 DOI: 10.3390/ijms22041851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/05/2021] [Accepted: 02/09/2021] [Indexed: 12/21/2022] Open
Abstract
Gastric cancer is considered one of the most common malignancies in humans and Helicobacter pylori infection is the major environmental risk factor of gastric cancer development. Given the high spread of this bacterium whose infection is mostly asymptomatic, H. pylori colonization persists for a long time, becoming chronic and predisposing to malignant transformation. The first defensive barrier from bacterial infection is constituted by the gastric mucosa that secretes several protective factors, among which is the trefoil factor 1 (TFF1), that, as mucin 5AC, binds the bacterium. Even if the protective role of TFF1 is well-documented, the molecular mechanisms that confer a beneficial function to the interaction among TFF1 and H. pylori remain still unclear. Here we analyze the effects of this interaction on H. pylori at morphological and molecular levels by means of microscopic observation, chemiotaxis and motility assays and real-time PCR analysis. Our results show that TFF1 favors aggregation of H. pylori and significantly slows down the motility of the bacterium across the mucus. Such aggregates significantly reduce both flgE and flaB gene transcription compared with bacteria not incubated with TFF1. Finally, our results suggest that the interaction between TFF1 and the bacterium may explain the frequent persistence of H. pylori in the human host without inducing disease.
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Affiliation(s)
- Daniela Eletto
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy; (D.E.); (M.V.); (F.M.); (P.D.G.); (A.P.)
| | - Megi Vllahu
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy; (D.E.); (M.V.); (F.M.); (P.D.G.); (A.P.)
| | - Fatima Mentucci
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy; (D.E.); (M.V.); (F.M.); (P.D.G.); (A.P.)
- PhD Program in Drug Discovery and Development, University of Salerno, 84084 Fisciano (SA), Italy
| | - Pasquale Del Gaudio
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy; (D.E.); (M.V.); (F.M.); (P.D.G.); (A.P.)
| | - Antonello Petrella
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy; (D.E.); (M.V.); (F.M.); (P.D.G.); (A.P.)
| | - Amalia Porta
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy; (D.E.); (M.V.); (F.M.); (P.D.G.); (A.P.)
- Correspondence: (A.P.); (A.T.); Tel.: +39-089-969455 (A.P.); +39-089-969797 (A.T.)
| | - Alessandra Tosco
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy; (D.E.); (M.V.); (F.M.); (P.D.G.); (A.P.)
- Correspondence: (A.P.); (A.T.); Tel.: +39-089-969455 (A.P.); +39-089-969797 (A.T.)
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11
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Eletto D, Reppucci F, Ronga A, Altieri V, Brongo S, Martinelli R, De Marco M, Marzullo L. Modulation of BAG3 expression in human normal urothelial cells by Diuron. J Cell Physiol 2020; 236:2616-2619. [PMID: 32810284 DOI: 10.1002/jcp.30016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 08/07/2020] [Accepted: 08/07/2020] [Indexed: 02/06/2023]
Abstract
Diuron [3-(3,4-dichlorophenyl)-1,1-dimethylurea] is a substituted urea herbicide, carcinogenic for the rat urinary bladder. It has been hypothesized that Diuron cytotoxicity, resulting in regenerative proliferation, leads to urothelial hyperplasia and, finally, to bladder tumors, but molecular mechanisms of carcinogenesis have not still fully investigated. Here, we report the results of a study aimed at verifying the involvement of BAG3, an intracellular protein expressed in several tumors, in the Diuron-induced carcinogenesis. For this purpose, we analyzed the effect of Diuron on human primary urothelial cells and on human dermal fibroblasts. We found that while high concentrations of Diuron have a cytotoxic effect in human primary urothelial cells, in the same cells, noncytotoxic concentrations of the herbicide induce BAG3 expression. These findings show that BAG3 is a molecular target of Diuron and unravel the possible involvement of BAG3 protein in bladder carcinogenesis induced by the herbicide. In addition, these results suggest that BAG3 might be a potential early biomarker of damage induced by chronic exposure to Diuron.
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Affiliation(s)
- Daniela Eletto
- Department of Medicine, Surgery and Dentistry "Schola Medica Salernitana", University of Salerno, Baronissi, SA, Italy
| | - Francesca Reppucci
- Department of Medicine, Surgery and Dentistry "Schola Medica Salernitana", University of Salerno, Baronissi, SA, Italy
| | - Agostino Ronga
- Department of Medicine, Surgery and Dentistry "Schola Medica Salernitana", University of Salerno, Baronissi, SA, Italy
| | - Vincenzo Altieri
- Department of Medicine, Surgery and Dentistry "Schola Medica Salernitana", University of Salerno, Baronissi, SA, Italy
| | - Sergio Brongo
- Department of Medicine, Surgery and Dentistry "Schola Medica Salernitana", University of Salerno, Baronissi, SA, Italy
| | - Rosanna Martinelli
- Department of Medicine, Surgery and Dentistry "Schola Medica Salernitana", University of Salerno, Baronissi, SA, Italy
| | - Margot De Marco
- Department of Medicine, Surgery and Dentistry "Schola Medica Salernitana", University of Salerno, Baronissi, SA, Italy.,BIOUNIVERSA s.r.l., Montoro Inf., AV, Italy
| | - Liberato Marzullo
- Department of Medicine, Surgery and Dentistry "Schola Medica Salernitana", University of Salerno, Baronissi, SA, Italy.,BIOUNIVERSA s.r.l., Montoro Inf., AV, Italy
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12
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Eletto D, Tosco A, Porta A. Editorial on: Genetic Determinants and Prediction of Antibiotic Resistance Phenotypes in Helicobacter pylori. J Clin Med 2020; 9:jcm9082469. [PMID: 32752161 PMCID: PMC7464660 DOI: 10.3390/jcm9082469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 07/28/2020] [Indexed: 11/21/2022] Open
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13
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Cassiano C, Eletto D, Tosco A, Riccio R, Monti MC, Casapullo A. Determining the Effect of Pterostilbene on Insulin Secretion Using Chemoproteomics. Molecules 2020; 25:E2885. [PMID: 32585851 PMCID: PMC7356329 DOI: 10.3390/molecules25122885] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 06/18/2020] [Accepted: 06/22/2020] [Indexed: 12/13/2022] Open
Abstract
Pterostilbene, the 3,5-dimethoxy derivative of resveratrol, is a well-known polyphenolic compound, mainly found in blueberries, grapevines, and Pterocarpus marsupium heartwood, which has recently attracted a great deal of attention due to its wide bio-pharmacological profile. Moreover, pterostilbene is more lipophilic than resveratrol, with a consequently better bioavailability and a more interesting therapeutic potential. In this work, a chemoproteomic approach, based on affinity chromatography, was applied on pterostilbene in the attempt to identify the biological targets responsible for its bioactivity. On this basis, syntaxins, a group of proteins involved in the formation of SNARE complexes mediating vesicles exocytosis, were selected among the most interesting pterostilbene interactors. In vitro and in cell assays gave evidence of the pterostilbene ability to reduce insulin secretion on glucose-stimulated pancreatic beta cells, opening the way to potential applications of pterostilbene as a supplement in the care of insulin-dependent metabolic disorders.
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Affiliation(s)
- Chiara Cassiano
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (C.C.); (D.E.); (A.T.); (R.R.)
- Department of Pharmacy, University of Naples “Federico II”, Via D., Montesano 49, 80131 Naples, Italy
| | - Daniela Eletto
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (C.C.); (D.E.); (A.T.); (R.R.)
| | - Alessandra Tosco
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (C.C.); (D.E.); (A.T.); (R.R.)
| | - Raffaele Riccio
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (C.C.); (D.E.); (A.T.); (R.R.)
| | - Maria Chiara Monti
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (C.C.); (D.E.); (A.T.); (R.R.)
| | - Agostino Casapullo
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (C.C.); (D.E.); (A.T.); (R.R.)
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14
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Ricci D, Tutton S, Chomistek S, Marrocco I, Ying M, Blumental D, Eletto D, Vargas J, Boyle S, Fazelinia H, Paton J, Paton A, Tang A, Hu CCA, Gidalevitz T, Argon Y. The connector between the kinase and RNase domains of IRE1α differentially controls the activities of this stress sensor. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.03046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Daniela Ricci
- Division of Cell Pathology, the Children’s Hospital of Philadelphia and the University of Pennsylvania, Civic Center Blvd, Philadelphia, PA 19104
| | - Stephen Tutton
- Division of Cell Pathology, the Children’s Hospital of Philadelphia and the University of Pennsylvania, Civic Center Blvd, Philadelphia, PA 19104
| | - Steven Chomistek
- Division of Cell Pathology, the Children’s Hospital of Philadelphia and the University of Pennsylvania, Civic Center Blvd, Philadelphia, PA 19104
| | - Ilaria Marrocco
- Division of Cell Pathology, the Children’s Hospital of Philadelphia and the University of Pennsylvania, Civic Center Blvd, Philadelphia, PA 19104
| | - Mingjie Ying
- Department of Biology, Drexel University, Philadelphia, PA 19104
| | - Daniel Blumental
- Division of Cell Pathology, the Children’s Hospital of Philadelphia and the University of Pennsylvania, Civic Center Blvd, Philadelphia, PA 19104
| | - Daniela Eletto
- Division of Cell Pathology, the Children’s Hospital of Philadelphia and the University of Pennsylvania, Civic Center Blvd, Philadelphia, PA 19104
| | - Jade Vargas
- Division of Cell Pathology, the Children’s Hospital of Philadelphia and the University of Pennsylvania, Civic Center Blvd, Philadelphia, PA 19104
| | - Sarah Boyle
- Division of Cell Pathology, the Children’s Hospital of Philadelphia and the University of Pennsylvania, Civic Center Blvd, Philadelphia, PA 19104
| | - Hossein Fazelinia
- Division of Cell Pathology, the Children’s Hospital of Philadelphia and the University of Pennsylvania, Civic Center Blvd, Philadelphia, PA 19104
| | - James Paton
- Department of Biology, Drexel University, Philadelphia, PA 19104
| | - Adrienne Paton
- School of Molecular and Biomedical Science, University of Adelaide, Adelaide, SA, 5005 Australia
| | | | | | - Tali Gidalevitz
- Department of Biology, Drexel University, Philadelphia, PA 19104
| | - Yair Argon
- Division of Cell Pathology, the Children’s Hospital of Philadelphia and the University of Pennsylvania, Civic Center Blvd, Philadelphia, PA 19104
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15
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Esposito R, Vllahu M, Morello S, Baldantoni D, Bellino A, Petrella A, Eletto D, Porta A, Tosco A. Low copper availability limits Helicobacter infection in mice. FEBS J 2019; 287:2948-2960. [PMID: 31863621 DOI: 10.1111/febs.15188] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 12/06/2019] [Accepted: 12/18/2019] [Indexed: 12/14/2022]
Abstract
Copper is an essential element for all living organisms; however, it becomes toxic at high concentrations due to its ability to participate in many redox reactions. This vital micronutrient balance plays an important role in the battle between host and pathogen, due to its use by the host to intoxicate pathogens. In this study, we explore the effects of copper deprivation on Helicobacter infection in mice using the copper chelator tetrathiomolybdate. Our results reveal that Helicobacter infection significantly reduces copper concentration in mice stomachs without affecting its circulating levels. Moreover, in copper-deprived mice, bacteria hardly colonize the epithelium and mice show less gastric damage in comparison with the infected ones. However, when the copper chelator is administered after infection, the condition of the mouse stomachs declines. This could be explained by the lower copper availability in tetrathiomolybdate-treated mice, which would reduce macrophages' action against the pathogen. In this scenario, we observe that the protective factor trefoil factor 1 is induced upon copper-deprived conditions, probably contributing to the inefficacy of infection, whereas, when the chelator is administered after infection, the gene is already silenced by bacteria and cannot be restored. In conclusion, our data suggest that Helicobacter takes advantage of gastric copper reducing its availability for the host and that copper levels have an impact on the outcome of infection.
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Affiliation(s)
| | - Megi Vllahu
- Department of Pharmacy, University of Salerno, Fisciano, Italy.,PhD Program in Drug Discovery and Development, University of Salerno, Fisciano, Italy
| | - Silvana Morello
- Department of Pharmacy, University of Salerno, Fisciano, Italy
| | - Daniela Baldantoni
- Department of Chemistry and Biology, University of Salerno, Fisciano, Italy
| | - Alessandro Bellino
- Department of Chemistry and Biology, University of Salerno, Fisciano, Italy
| | | | - Daniela Eletto
- Department of Pharmacy, University of Salerno, Fisciano, Italy
| | - Amalia Porta
- Department of Pharmacy, University of Salerno, Fisciano, Italy
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16
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Iorio V, De Marco M, Basile A, Eletto D, Capunzo M, Remondelli P, Sala G, Marzullo L, Rosati A, De Laurenzi V, Turco MC. CAF-Derived IL6 and GM-CSF Cooperate to Induce M2-like TAMs-Letter. Clin Cancer Res 2019; 25:892-893. [PMID: 30647085 DOI: 10.1158/1078-0432.ccr-18-2455] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 09/15/2018] [Accepted: 11/01/2018] [Indexed: 11/16/2022]
Affiliation(s)
- Vittoria Iorio
- Department of Medicine, Surgery and Odontology Schola Medica Salernitana, University of Salerno, Baronissi, Italy
| | - Margot De Marco
- Department of Medicine, Surgery and Odontology Schola Medica Salernitana, University of Salerno, Baronissi, Italy.,BIOUNIVERSA s.r.l., R&D Division, Baronissi, Italy
| | - Anna Basile
- Department of Medicine, Surgery and Odontology Schola Medica Salernitana, University of Salerno, Baronissi, Italy.,BIOUNIVERSA s.r.l., R&D Division, Baronissi, Italy
| | - Daniela Eletto
- Department of Medicine, Surgery and Odontology Schola Medica Salernitana, University of Salerno, Baronissi, Italy
| | - Mario Capunzo
- Department of Medicine, Surgery and Odontology Schola Medica Salernitana, University of Salerno, Baronissi, Italy
| | - Paolo Remondelli
- Department of Medicine, Surgery and Odontology Schola Medica Salernitana, University of Salerno, Baronissi, Italy
| | - Gianluca Sala
- Dipartimento di Scienze Mediche, Orali e Biotecnologiche, CeSI, Universita' 'G. D'Annunzio' di Chieti e Pescara, Pescara, Italy
| | - Liberato Marzullo
- Department of Medicine, Surgery and Odontology Schola Medica Salernitana, University of Salerno, Baronissi, Italy.,BIOUNIVERSA s.r.l., R&D Division, Baronissi, Italy
| | - Alessandra Rosati
- Department of Medicine, Surgery and Odontology Schola Medica Salernitana, University of Salerno, Baronissi, Italy.,BIOUNIVERSA s.r.l., R&D Division, Baronissi, Italy
| | - Vincenzo De Laurenzi
- BIOUNIVERSA s.r.l., R&D Division, Baronissi, Italy.,Dipartimento di Scienze Mediche, Orali e Biotecnologiche, CeSI, Universita' 'G. D'Annunzio' di Chieti e Pescara, Pescara, Italy
| | - Maria C Turco
- Department of Medicine, Surgery and Odontology Schola Medica Salernitana, University of Salerno, Baronissi, Italy. .,BIOUNIVERSA s.r.l., R&D Division, Baronissi, Italy
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17
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Ricci D, Marrocco I, Blumenthal D, Dibos M, Eletto D, Vargas J, Boyle S, Iwamoto Y, Chomistek S, Paton JC, Paton AW, Argon Y. Clustering of IRE1α depends on sensing ER stress but not on its RNase activity. FASEB J 2019; 33:9811-9827. [PMID: 31199681 DOI: 10.1096/fj.201801240rr] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The sensors of the unfolded protein response react to endoplasmic reticulum (ER) stress by transient activation of their enzymatic activities, which initiate various signaling cascades. In addition, the sensor IRE1α exhibits stress-induced clustering in a transient time frame similar to activation of its endoRNase activity. Previous work had suggested that the clustering response and RNase activity of IRE1α are functionally linked, but here we show that they are independent of each other and have different behaviors and modes of activation. Although both clustering and the RNase activity are responsive to luminal stress conditions and to depletion of the ER chaperone binding protein, RNase-inactive IRE1α still clusters and, conversely, full RNase activity can be accomplished without clustering. The clusters formed by RNase-inactive IRE1α are much larger and persist longer than those induced by ER stress. Clustering requires autophosphorylation, and an IRE1α mutant whose RNase domain is responsive to ligands that bind the kinase domain forms yet a third type of stress-independent cluster, with distinct physical properties and half-lives. These data suggest that IRE1α clustering can follow distinct pathways upon activation of the sensor.-Ricci, D., Marrocco, I., Blumenthal, D., Dibos, M., Eletto, D., Vargas, J., Boyle, S., Iwamoto, Y., Chomistek, S., Paton, J. C., Paton, A. W., Argon, Y. Clustering of IRE1α depends on sensing ER stress but not on its RNase activity.
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Affiliation(s)
- Daniela Ricci
- Division of Cell Pathology, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Ilaria Marrocco
- Division of Cell Pathology, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Daniel Blumenthal
- Division of Cell Pathology, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Miriam Dibos
- Division of Cell Pathology, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Daniela Eletto
- Division of Cell Pathology, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jade Vargas
- Division of Cell Pathology, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Sarah Boyle
- Division of Cell Pathology, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Yuichiro Iwamoto
- Division of Cell Pathology, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Steven Chomistek
- Division of Cell Pathology, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - James C Paton
- Department of Molecular and Cellular Biology, University of Adelaide, Adelaide, South Australia, Australia
| | - Adrienne W Paton
- Department of Molecular and Cellular Biology, University of Adelaide, Adelaide, South Australia, Australia
| | - Yair Argon
- Division of Cell Pathology, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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18
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Basile A, De Marco M, Festa M, Falco A, Iorio V, Guerriero L, Eletto D, Rea D, Arra C, Lamolinara A, Ballerini P, Damiani V, Rosati A, Sala G, Turco MC, Marzullo L, De Laurenzi V. Development of an anti-BAG3 humanized antibody for treatment of pancreatic cancer. Mol Oncol 2019; 13:1388-1399. [PMID: 30973679 PMCID: PMC6547619 DOI: 10.1002/1878-0261.12492] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 03/25/2019] [Accepted: 04/10/2019] [Indexed: 12/25/2022] Open
Abstract
We have previously shown that secreted BAG3 is a potential target for the treatment of pancreatic ductal adenocarcinoma and that pancreatic tumor growth and metastatic dissemination can be reduced by treatment with an anti-BAG3 murine antibody. Here, we used complementarity-determining region (CDR) grafting to generate a humanized version of the anti-BAG3 antibody that may be further developed for possible clinical use. We show that the humanized anti-BAG3 antibody, named BAG3-H2L4, abrogates BAG3 binding to macrophages and subsequent release of IL-6. Furthermore, it specifically localizes into tumor tissues and significantly inhibits the growth of Mia PaCa-2 pancreatic cancer cell xenografts. We propose BAG3-H2L4 antibody as a potential clinical candidate for BAG3-targeted therapy in pancreatic cancer.
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Affiliation(s)
- Anna Basile
- BIOUNIVERSA s.r.l.R&D DivisionUniversity of SalernoBaronissiItaly
- Department of Medicine, Surgery and DentistryUniversity of SalernoBaronissiItaly
| | - Margot De Marco
- BIOUNIVERSA s.r.l.R&D DivisionUniversity of SalernoBaronissiItaly
- Department of Medicine, Surgery and DentistryUniversity of SalernoBaronissiItaly
| | - Michelina Festa
- BIOUNIVERSA s.r.l.R&D DivisionUniversity of SalernoBaronissiItaly
- Department of PharmacyUniversity of SalernoFiscianoItaly
| | - Antonia Falco
- BIOUNIVERSA s.r.l.R&D DivisionUniversity of SalernoBaronissiItaly
- Department of PharmacyUniversity of SalernoFiscianoItaly
| | - Vittoria Iorio
- Department of Medicine, Surgery and DentistryUniversity of SalernoBaronissiItaly
| | - Luana Guerriero
- BIOUNIVERSA s.r.l.R&D DivisionUniversity of SalernoBaronissiItaly
| | - Daniela Eletto
- Department of Medicine, Surgery and DentistryUniversity of SalernoBaronissiItaly
| | - Domenica Rea
- S.S.D. Sperimentazione AnimaleIstituto Nazionale Tumori “IRCCS” Fondazione G. PascaleNaplesItaly
| | - Claudio Arra
- S.S.D. Sperimentazione AnimaleIstituto Nazionale Tumori “IRCCS” Fondazione G. PascaleNaplesItaly
| | - Alessia Lamolinara
- Dipartimento di Scienze MedicheOrali e BiotecnologicheCentro Studi sull'InvecchiamentoCeSI‐MeTUniversity ‘G. d'Annunzio’ di Chieti‐PescaraItaly
| | - Patrizia Ballerini
- Department of Neuroscience, Imaging and Clinical Sciences and Center for Research on Aging and Translational Medicine (CeSI‐MeT)‘G. d'Annunzio’ University of ChietiItaly
| | - Verena Damiani
- Dipartimento di Scienze MedicheOrali e BiotecnologicheCentro Studi sull'InvecchiamentoCeSI‐MeTUniversity ‘G. d'Annunzio’ di Chieti‐PescaraItaly
| | - Alessandra Rosati
- BIOUNIVERSA s.r.l.R&D DivisionUniversity of SalernoBaronissiItaly
- Department of Medicine, Surgery and DentistryUniversity of SalernoBaronissiItaly
| | - Gianluca Sala
- Dipartimento di Scienze MedicheOrali e BiotecnologicheCentro Studi sull'InvecchiamentoCeSI‐MeTUniversity ‘G. d'Annunzio’ di Chieti‐PescaraItaly
| | - Maria Caterina Turco
- BIOUNIVERSA s.r.l.R&D DivisionUniversity of SalernoBaronissiItaly
- Department of Medicine, Surgery and DentistryUniversity of SalernoBaronissiItaly
| | - Liberato Marzullo
- BIOUNIVERSA s.r.l.R&D DivisionUniversity of SalernoBaronissiItaly
- Department of Medicine, Surgery and DentistryUniversity of SalernoBaronissiItaly
| | - Vincenzo De Laurenzi
- BIOUNIVERSA s.r.l.R&D DivisionUniversity of SalernoBaronissiItaly
- Dipartimento di Scienze MedicheOrali e BiotecnologicheCentro Studi sull'InvecchiamentoCeSI‐MeTUniversity ‘G. d'Annunzio’ di Chieti‐PescaraItaly
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19
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Esposito R, Morello S, Vllahu M, Eletto D, Porta A, Tosco A. Gastric TFF1 Expression from Acute to Chronic Helicobacter Infection. Front Cell Infect Microbiol 2017; 7:434. [PMID: 29085807 PMCID: PMC5649190 DOI: 10.3389/fcimb.2017.00434] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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: 07/17/2017] [Accepted: 09/21/2017] [Indexed: 12/26/2022] Open
Abstract
TFF1, a mucin-associated secreted peptide of gastric mucous cells, is known as a protective agent for stomach epithelium under different stimuli, but its role upon Helicobacter infection is still not clear. In this paper we characterized TFFs expression, with particular attention to TFF1, under Helicobacter infection in gastric cell lines. A mouse model was used to distinguish TFF1 mRNA expression between acute and chronic stages of Helicobacter infection. Our results show that TFF1 expression is induced in infected cells; in addition, the inflammatory response upon Helicobacter infection is inversely associated to pre-existing TFF1 protein levels. In infected mice, TFF1 is initially upregulated in gastric antrum in the acute phase of infection, along with IL-1β and IL-6. Then, expression of TFF1 is gradually silenced when the infection becomes chronic and IFN-γ, CXCL5, and CXCL15 reach higher levels. Our data suggest that TFF1 might help cells to counteract bacteria colonization and the development of a chronic inflammation.
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Affiliation(s)
| | - Silvana Morello
- Department of Pharmacy, University of Salerno, Fisciano, Italy
| | - Megi Vllahu
- Department of Pharmacy, University of Salerno, Fisciano, Italy.,PhD Program in Drug Discovery and Development, University of Salerno, Fisciano, Italy
| | - Daniela Eletto
- Department of Pharmacy, University of Salerno, Fisciano, Italy
| | - Amalia Porta
- Department of Pharmacy, University of Salerno, Fisciano, Italy
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20
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Eletto D, Eletto D, Boyle S, Argon Y. PDIA6 regulates insulin secretion by selectively inhibiting the RIDD activity of IRE1. FASEB J 2015; 30:653-65. [PMID: 26487694 DOI: 10.1096/fj.15-275883] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 09/28/2015] [Indexed: 12/14/2022]
Abstract
Protein disulfide isomerase A6 (PDIA6) interacts with protein kinase RNA-like endoplasmic reticulum kinase (PERK) and inositol requiring enzyme (IRE)-1 and inhibits their unfolded protein response signaling. In this study, shRNA silencing of PDIA6 expression in insulin-producing mouse cells reduced insulin production (5-fold) and, consequently, glucose-stimulated insulin secretion (3-4-fold). This inhibition of insulin release was independent of the PDIA6-PERK interaction or PERK activity. Acute inhibition of PERK did not change the short-term response of β cells to glucose. Rather, PDIA6 affected insulin secretion by modulating one of the activities of IRE1. At 11 mM glucose and lower, the regulated IRE1-dependent decay (RIDD) of the mRNA activity of IRE1 was activated, but not its X-box binding protein (XBP)-1 splicing activity. In the absence of PDIA6, RIDD activity toward insulin transcripts was enhanced up to 4-fold, as shown by molecular assays in cultured cells and the use of a fluorescent reporter in intact islets. Such physiologic activation of IRE1 by glucose contrasted with IRE1 activation by chemical stress, when both IRE1 activities were induced. Thus, whereas the stimulus determines the quality of IRE1 signaling, PDIA6 attenuates multiple enzymatic activities of IRE1, maintaining its signaling within a physiologically tolerable range.
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Affiliation(s)
- Daniela Eletto
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia and Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Davide Eletto
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia and Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Sarah Boyle
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia and Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Yair Argon
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia and Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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21
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Eletto D, Eletto D, Dersh D, Gidalevitz T, Argon Y. Protein disulfide isomerase A6 controls the decay of IRE1α signaling via disulfide-dependent association. Mol Cell 2014; 53:562-576. [PMID: 24508390 DOI: 10.1016/j.molcel.2014.01.004] [Citation(s) in RCA: 168] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 11/25/2013] [Accepted: 01/03/2014] [Indexed: 11/29/2022]
Abstract
The response to endoplasmic reticulum (ER) stress relies on activation of unfolded protein response (UPR) sensors, and the outcome of the UPR depends on the duration and strength of signal. Here, we demonstrate a mechanism that attenuates the activity of the UPR sensor inositol-requiring enzyme 1α (IRE1α). A resident ER protein disulfide isomerase, PDIA6, limits the duration of IRE1α activity by direct binding to cysteine 148 in the lumenal domain of the sensor, which is oxidized when IRE1 is activated. PDIA6-deficient cells hyperrespond to ER stress with sustained autophosphorylation of IRE1α and splicing of XBP1 mRNA, resulting in exaggerated upregulation of UPR target genes and increased apoptosis. In vivo, PDIA6-deficient C. elegans exhibits constitutive UPR and fails to complete larval development, a program that normally requires the UPR. Thus, PDIA6 activity provides a mechanism that limits UPR signaling and maintains it within a physiologically appropriate range.
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Affiliation(s)
- Davide Eletto
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia and The University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Daniela Eletto
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia and The University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Devin Dersh
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia and The University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Tali Gidalevitz
- Department of Biology, Drexel University, Philadelphia, PA 19104, USA
| | - Yair Argon
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia and The University of Pennsylvania, Philadelphia, PA 19104, USA
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22
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Mari A, Eletto D, Pizza C, Montoro P, Piacente S. Integrated mass spectrometry approach to profile proanthocyanidins occurring in food supplements: analysis of Potentilla erecta L. rhizomes. Food Chem 2013; 141:4171-8. [PMID: 23993602 DOI: 10.1016/j.foodchem.2013.06.101] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 06/21/2013] [Accepted: 06/24/2013] [Indexed: 11/17/2022]
Abstract
Potentilla erecta (L.) is known for the high concentration of proanthocyanidin oligomers (PAs) in its underground parts. The use of its preparations as food supplements and the lack of chemical-analytical studies concerning with an efficient chromatographic separation procedure for these compounds led us to develop a strategy to profile PAs occurring in this species. Their presence has been rationalised on the basis of mass spectrometric profiles. Direct flow injection/electrospray ionisation (ESI)/ion trap (IT) mass spectrometry was used to investigate the hydroalcoholic extract of P. erecta. To achieve deeper structural information and to focus the analysis on PAs with high polimerisation degree (DP), matrix assisted laser desorption ionisation (MALDI)-time of flight (TOF)-mass spectrometry, was used. Finally, liquid chromatography tandem mass spectrometry (LC-MS(2)) analyses were executed by using a diol stationary phase to detect PAs from DP1 to DP10. Results suggested that all of them were B-type procyanidins with 4→8 linkages.
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Affiliation(s)
- Angela Mari
- Dipartimento di Farmacia, Università degli Studi di Salerno, via Ponte don Melillo, 84084 Fisciano (SA), Italy
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23
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Eletto D, Maganty A, Eletto D, Dersh D, Makarewich C, Biswas C, Paton JC, Paton AW, Doroudgar S, Glembotski CC, Argon Y. Limitation of individual folding resources in the ER leads to outcomes distinct from the unfolded protein response. J Cell Sci 2012; 125:4865-75. [PMID: 22854046 DOI: 10.1242/jcs.108928] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
ER stress leads to upregulation of multiple folding and quality control components, known as the unfolded protein response (UPR). Glucose Regulated Protein 78 (GRP78) (also known as binding immunoglobulin protein, BiP, and HSPA5) and GRP94 are often upregulated coordinately as part of this homeostatic response. Given that endoplasmic reticulum (ER) chaperones have distinct sets of clients, we asked how cells respond to ablation of individual chaperones. The cellular responses to silencing BiP, GRP94, HSP47, PDIA6 and OS-9, were distinct. When BiP was silenced, a widespread UPR was observed, but when GRP94 was either inhibited or depleted by RNA interference (RNAi), the expression of only some genes was induced, notably those encoding BiP and protein disulfide isomerase A6 (PDIA6). Silencing of HSP47 or OS-9 did not lead to any compensatory induction of other genes. The selective response to GRP94 depletion was distinct from a typical ER stress response, both because other UPR target genes were not affected and because the canonical UPR signaling branches were not activated. The response to silencing of GRP94 did not preclude further UPR induction when chemical stress was imposed. Importantly, re-expression of wild-type GRP94 in the silenced cells prevented the upregulation of BiP and PDIA6, whereas re-expression of an ATPase-deficient GRP94 mutant did not, indicating that cells monitor the activity state of GRP94. These findings suggest that cells are able to distinguish among folding resources and generate distinct responses.
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Affiliation(s)
- Davide Eletto
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, PA 19104, USA
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Isani G, Andreani G, Carpenè E, Di Molfetta S, Eletto D, Spisni E. Effects of waterborne Cu exposure in gilthead sea bream (Sparus aurata): a proteomic approach. Fish Shellfish Immunol 2011; 31:1051-1058. [PMID: 21925607 DOI: 10.1016/j.fsi.2011.09.005] [Citation(s) in RCA: 13] [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] [Received: 06/01/2011] [Revised: 07/25/2011] [Accepted: 09/06/2011] [Indexed: 05/31/2023]
Abstract
Aquatic organisms may suffer from exposure to high Cu concentrations, since this metal is widely used in feed supplementation, in pesticide formulation and as antifouling. Chronic exposure to Cu, even at sub-lethal doses, may strongly affect fish physiology. To date, several biomarkers have been used to detect Cu exposure in fish producing contrasting results. Therefore, we used a proteomic approach to clarify how Cu exposure may affect the serum proteome of gilthead sea bream (Sparus aurata), since serum could be considered a good source of early-biomarkers of Cu toxicosis. For this purpose we exposed juvenile gilthead sea bream to waterborne Cu (0.5 mg/L). Our results indicate that fish tightly regulate circulating Cu levels, which are not affected by metal exposure. This homeostatic control is mainly achieved by the liver, able to excrete high amounts of the metal via bile. Cu exposure caused differential expression of several serum proteins, 10 of which were identified by Mascot and BLAST search. All these proteins, with the exception of growth hormone receptor and γ-glutamyl-carboxylase, can be related to: 1) Cu-induced hepatotoxicity (cytochrome oxidase subunit I, alanine aminotransferase, glutathione S-transferase); 2) potential immunosuppression due to interference of Cu with the inflammation/immunity network (α-1 antitrypsin, angiotensinogen, complement component C3, recombination-activating protein-1 and warm temperature acclimation-related 65 kDa protein).
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Affiliation(s)
- Gloria Isani
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia (BO), Italy.
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25
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da Silva VC, Napolitano A, Eletto D, Rodrigues CM, Pizza C, Vilegas W. Characterization of gallotannins from Astronium species by flow injection analysis- electrospray ionization-ion trap-tandem mass spectrometry and matrix-assisted laser desorption/ionization time-of- flight mass spectrometry. Eur J Mass Spectrom (Chichester) 2011; 17:365-375. [PMID: 22006629 DOI: 10.1255/ejms.1141] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The species Astronium urundeuva (Allemao) Engl. and Astronium graveolens Jacq., which are used in Brazilian folk medicine to treat allergies, inflammation, diarrhea and ulcers, were investigated for their composition. The aim of this study was to define a rapid and reliable analytical approach, based on the flow-injection analysis-electrospray ionization-ion trap-tandem mass spectrometry (FIA-ESI-IT-MS-MS) and matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry (MALDI-ToF-MS), to investigate the full range of hydrolyzable tannins present in the extracts of these Astronium species. The MALDI-ToF-MS analysis allowed us to ascertain the presence of hydrolysable tannins in both Astronium species as a series of gallotannins with degrees of polymerization of 7 to 13 galloyl units. Moreover, the analysis by FIA-ESI-IT-MS-MS, as well as confirming this result and chemically defining gallotannins as galloylglucose compounds, highlighted the presence of further classes of hydrolysable tannins, such as hexahydrodiphenoyl esters of glucose and some gallic acid derivatives, providing information about their structure by a careful study of their fragmentation patterns. Finally, the evaluation of the number of positional isomers of gallotannins occurring in both Astronium species was obtained by high-performance liquid chromatography-electrospray ionization-ion trap mass spectrometry (HPLC/ESI-IT-MS). This is the first mass spectrometric evidence relating to the existence of gallotannins in Astronium genus.
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Dal Piaz F, Tosco A, Eletto D, Piccinelli AL, Moltedo O, Franceschelli S, Sbardella G, Remondelli P, Rastrelli L, Vesci L, Pisano C, De Tommasi N. The identification of a novel natural activator of p300 histone acetyltranferase provides new insights into the modulation mechanism of this enzyme. Chembiochem 2010; 11:818-27. [PMID: 20373302 DOI: 10.1002/cbic.200900721] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Many severe human pathologies are related to alterations of the fine balance between histone acetylation and deacetylation; because not all such diseases involve hypoacetylation, but also hyperacetylation, compounds able to enhance or repress the activities of histone acetyltransferases (HATs) could be promising therapeutic agents. We evaluated in vitro and in cell the ability of eleven natural polyisoprenylated benzophenone derivatives to modulate the HAT activity of p300/CBP, an enzyme that plays a pivotal role in a variety of cellular processes. Some of the tested compounds bound efficiently to the p300/CBP protein: in particular, guttiferone A, guttiferone E and clusianone inhibit its HAT activity, whereas nemorosone showed a surprising ability to activate the enzyme. The ability of nemorosone to penetrate cell membranes and modulate histone acetylation into the cell together with its high affinity for the p300/CBP enzyme made this compound a suitable lead for the design of optimized anticancer drugs. Besides, the studies performed at a cellular and molecular level on both the inhibitors and the activator provided new insights into the modulation mechanism of p300/CBP by small molecules.
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Affiliation(s)
- Fabrizio Dal Piaz
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Salerno, Via Ponte Don Melillo 1, 84084 Fisciano, SA, Italy.
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