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Salucci S, Giordani M, Betti M, Valentini L, Gobbi P, Mattioli M. The in vitro cytotoxic effects of natural (fibrous epsomite crystals) and synthetic (Epsom salt) magnesium sulfate. Microsc Res Tech 2024; 87:685-694. [PMID: 37982323 DOI: 10.1002/jemt.24458] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 10/18/2023] [Accepted: 11/05/2023] [Indexed: 11/21/2023]
Abstract
Exposure to mineral fibers represents an occupational and environmental hazard since particulate inhalation leads to several health disorders. However, few data are available on the effect of fibers with high solubility like natural epsomite, a water-soluble fiber with an inhalable size that allows it to penetrate biological systems, with regard to the respiratory tract. This study evaluated the natural (fibrous epsomite) and synthetic (Epsom salt) magnesium sulfate pathogenicity. Investigations have been performed through morpho-functional and biochemical analyses, in an in vitro cell model that usually grows as monocytes, but that under appropriate conditions differentiates into macrophages. These latter, known as alveolar macrophages, if referred to lungs, represent the first line of defense against harmful inhaled stimuli. Morphological observations reveal that, if Epsom salt induces osmotic stress on cell culture, natural epsomite fibers lead to cellular alterations including thickening of the nuclear envelope and degenerated mitochondria. Moreover, the insoluble fraction (impurities) internalized by cells induces diffuse damage characterized at the highest dosage and exposure time by secondary necrosis or necrotic cell death features. Biochemical analyses confirm this mineral behavior that involves MAPK pathway activation, resulting in many different cellular responses ranging from proliferation control to cell death. Epsom salt leads to MAPK/ERK activation, a marker predictive of overall survival. Unlike, natural epsomite induces upregulation of MAPK/p38 protein involved in the phosphorylation of downstream targets driving necrotic cell death. These findings demonstrate natural epsomite toxicity on U937 cell culture, making the inhalation of these fibers potentially hazardous for human health. RESEARCH HIGHLIGHTS: Natural epsomite and synthetic Epsom salt effects have been evaluated in U937 cell model. Epsom salt induces an osmotic cellular stress. Natural epsomite fibers lead to cellular damage and can be considered potentially dangerous for human health.
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Affiliation(s)
- Sara Salucci
- Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
| | - Matteo Giordani
- Department of Pure and Applied Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Michele Betti
- Department of Biomolecular Sciences (DISB), University of Urbino Carlo Bo, Urbino, Italy
| | - Laura Valentini
- Department of Biomolecular Sciences (DISB), University of Urbino Carlo Bo, Urbino, Italy
| | - Pietro Gobbi
- Department of Biomolecular Sciences (DISB), University of Urbino Carlo Bo, Urbino, Italy
| | - Michele Mattioli
- Department of Pure and Applied Sciences, University of Urbino Carlo Bo, Urbino, Italy
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Luciani L, Stefanetti V, Rampacci E, Gobbi P, Valentini L, Capuozzo R, Passamonti F. Comparison between clinical evaluations and laboratory findings and the impact of biofilm on antimicrobial susceptibility in vitro in canine otitis externa. Vet Dermatol 2023; 34:586-596. [PMID: 37580811 DOI: 10.1111/vde.13197] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 03/14/2023] [Accepted: 03/24/2023] [Indexed: 08/16/2023]
Abstract
BACKGROUND In canine otitis externa (OE), biofilm-producing bacteria are frequently present but biofilm may be underdiagnosed clinically. HYPOTHESIS/OBJECTIVES The study aimed to investigate an association between clinical and cytological findings with bacteriological data from dogs with OE, to establish, through Environmental Scanning Electron Microscope (ESEM) examination, whether the presence of biofilm in vivo can be predicted and to evaluate the impact of biofilm on antimicrobial susceptibility tests. MATERIALS AND METHODS Fifty-six dogs showing clinical signs of OE were enrolled. One cotton swab each was collected for ESEM, bacterial culture and susceptibility testing and for cytology. Staphylococcus pseudintermedius (n = 42, 48.8%) and Pseudomonas aeruginosa (n = 26, 30.2%) were tested for their ability to form biofilm. Minimum Inhibitory Concentrations (MIC), Minimal Biofilm Inhibitory Concentrations (MBIC) and Minimal Biofilm Eradication Concentrations (MBEC) towards enrofloxacin, gentamicin, polymyxin B and rifampicin were determined. RESULTS Pseudomonas aeruginosa was positively associated with the biofilm clinical evaluation (p < 0.01) and neutrophils (p < 0.05), nuclear streaks (p < 0.01) and rods bacteria (p < 0.01) on cytology. S. pseudintermedius was associated with a low presence of neutrophils. There was a statistical correlation between clinical and cytological biofilm presence (p ≤ 0.01), but none with the biofilm production assay nor ESEM biofilm detection. No differences were found comparing the results of MIC and MBIC. MBEC results showed higher values than MIC and MBIC for all antimicrobials tested (p ≤ 0.001). CONCLUSIONS AND CLINICAL RELEVANCE Biofilm presence in OE was often underdiagnosed. Even if there is no specific clinical or cytological pattern related to biofilm, its presence should always be suspected.
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Affiliation(s)
- Luca Luciani
- Private Practitioner, Centro Veterinario Cattolica, Cattolica, Italy
| | | | - Elisa Rampacci
- Department of Veterinary Medicine, University of Perugia, Perugia, Italy
| | - Pietro Gobbi
- Department of Biomolecular Sciences, University of Urbino, Carlo Bo, Italy
| | - Laura Valentini
- Department of Biomolecular Sciences, University of Urbino, Carlo Bo, Italy
| | - Raffaella Capuozzo
- Department of Veterinary Medicine, University of Perugia, Perugia, Italy
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Trucas M, Burattini S, Porcu S, Simbula M, Ristaldi MS, Kowalik MA, Serra MP, Gobbi P, Battistelli M, Perra A, Quartu M. Multi-Organ Morphological Findings in a Humanized Murine Model of Sickle Cell Trait. Int J Mol Sci 2023; 24:10452. [PMID: 37445630 DOI: 10.3390/ijms241310452] [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: 05/09/2023] [Revised: 06/15/2023] [Accepted: 06/19/2023] [Indexed: 07/15/2023] Open
Abstract
Sickle cell disease (SCD) is caused by the homozygous beta-globin gene mutation that can lead to ischemic multi-organ damage and consequently reduce life expectancy. On the other hand, sickle cell trait (SCT), the heterozygous beta-globin gene mutation, is still considered a benign condition. Although the mechanisms are not well understood, clinical evidence has recently shown that specific pathological symptoms can also be recognized in SCT carriers. So far, there are still scant data regarding the morphological modifications referable to possible multi-organ damage in the SCT condition. Therefore, after genotypic and hematological characterization, by conventional light microscopy and transmission electron microscopy (TEM), we investigated the presence of tissue alterations in 13 heterozygous Townes mice, one of the best-known animal models that, up to now, was used only for the study of the homozygous condition. We found that endothelial alterations, as among which the thickening of vessel basal lamina, are ubiquitous in the lung, liver, kidney, and spleen of SCT carrier mice. The lung shows the most significant alterations, with a distortion of the general tissue architecture, while the heart is the least affected. Collectively, our findings contribute novel data to the histopathological modifications at microscopic and ultrastructural levels, underlying the heterozygous beta-globin gene mutation, and indicate the translational suitability of the Townes model to characterize the features of multiple organ involvement in the SCT carriers.
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Affiliation(s)
- Marcello Trucas
- Department of Biomedical Sciences, Section of Cytomorphology, University of Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato, Italy
| | - Sabrina Burattini
- Department of Biomolecular Sciences, Campus Scientifico "Enrico Mattei", University of Urbino Carlo Bo, Via Ca' le Suore 2-Località Crocicchia, 61029 Urbino, Italy
| | - Susanna Porcu
- Italian National Research Council (CNR)-IRGB, Cittadella Universitaria Monserrato, 09042 Monserrato, Italy
| | - Michela Simbula
- Italian National Research Council (CNR)-IRGB, Cittadella Universitaria Monserrato, 09042 Monserrato, Italy
| | - Maria Serafina Ristaldi
- Italian National Research Council (CNR)-IRGB, Cittadella Universitaria Monserrato, 09042 Monserrato, Italy
| | - Marta Anna Kowalik
- Department of Biomedical Sciences, Unit of Oncology and Molecular Pathology, University of Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato, Italy
| | - Maria Pina Serra
- Department of Biomedical Sciences, Section of Cytomorphology, University of Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato, Italy
| | - Pietro Gobbi
- Department of Biomolecular Sciences, Campus Scientifico "Enrico Mattei", University of Urbino Carlo Bo, Via Ca' le Suore 2-Località Crocicchia, 61029 Urbino, Italy
| | - Michela Battistelli
- Department of Biomolecular Sciences, Campus Scientifico "Enrico Mattei", University of Urbino Carlo Bo, Via Ca' le Suore 2-Località Crocicchia, 61029 Urbino, Italy
| | - Andrea Perra
- Department of Biomedical Sciences, Unit of Oncology and Molecular Pathology, University of Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato, Italy
| | - Marina Quartu
- Department of Biomedical Sciences, Section of Cytomorphology, University of Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato, Italy
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Sisti D, Pazienza V, Piccini F, Citterio B, Baffone W, Donati Zeppa S, Biavasco F, Prospero E, De Luca A, Artico M, Taurone S, Minelli A, Perri F, Binda E, Pracella R, Santolini R, Amatori S, Sestili P, Rocchi MBL, Gobbi P. A proposal for the reference intervals of the Italian microbiota "scaffold" in healthy adults. Sci Rep 2022; 12:3952. [PMID: 35273317 PMCID: PMC8913673 DOI: 10.1038/s41598-022-08000-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 09/20/2021] [Accepted: 02/22/2022] [Indexed: 02/06/2023] Open
Abstract
Numerous factors, ranging from genetics, age, lifestyle, and dietary habits to local environments, contribute to the heterogeneity of the microbiota in humans. Understanding the variability of a “healthy microbiota” is a major challenge in scientific research. The gut microbiota profiles of 148 healthy Italian volunteers were examined by 16S rRNA gene sequencing to determine the range and diversity of taxonomic compositions in the gut microbiota of healthy populations. Possible driving factors were evaluated through a detailed anamnestic questionnaire. Microbiota reference intervals were also calculated. A “scaffold” of a healthy Italian gut microbiota composition was identified. Differences in relative quantitative ratios of microbiota composition were detected in two clusters: a bigger cluster (C2), which included 124 subjects, was characterized by more people from the northern Italian regions, who habitually practised more physical activity and with fewer dietary restrictions. Species richness and diversity were significantly higher in this cluster (C2) than in the other one (C1) (C1: 146.67 ± 43.67; C2: 198.17 ± 48.47; F = 23.40; P < 0.001 and C1: 16.88 ± 8.66; C2: 35.01 ± 13.40; F = 40.50; P < 0.001, respectively). The main contribution of the present study was the identification of the existence of a primary healthy microbiological framework that is only marginally affected by variations. Taken together, our data help to contextualize studies on population-specific variations, including marginal aspects, in human microbiota composition. Such variations must be related to the primary framework of a healthy microbiota and providing this perspective could help scientists to better design experimental plans and develop strategies for precision tailored microbiota modulation.
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Affiliation(s)
- Davide Sisti
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Piazza Rinascimento 7, 61029, Urbino, Italy
| | - Valerio Pazienza
- Division of Gastroenterology, IRCCS "Casa Sollievo della Sofferenza" Hospital, 71013, San Giovanni Rotondo, Italy
| | | | - Barbara Citterio
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Piazza Rinascimento 7, 61029, Urbino, Italy
| | - Wally Baffone
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Piazza Rinascimento 7, 61029, Urbino, Italy
| | - Sabrina Donati Zeppa
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Piazza Rinascimento 7, 61029, Urbino, Italy
| | - Francesca Biavasco
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, 60121, Ancona, Italy
| | - Emilia Prospero
- Department of Biomedical Sciences, Università Politecnica delle Marche, 60121, Ancona, Italy
| | - Antonio De Luca
- Department of Mental and Physical Health and Preventive Medicine, Section of Human Anatomy, University of Campania "Luigi Vanvitelli", 80138, Naples, Italy
| | - Marco Artico
- Department of Sense Organs, La Sapienza University, 00185, Rome, Italy
| | - Samanta Taurone
- Department of Sense Organs, La Sapienza University, 00185, Rome, Italy
| | - Andrea Minelli
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Piazza Rinascimento 7, 61029, Urbino, Italy
| | - Francesco Perri
- Division of Gastroenterology, IRCCS "Casa Sollievo della Sofferenza" Hospital, 71013, San Giovanni Rotondo, Italy
| | - Elena Binda
- Cancer Stem Cells Unit ISBReMIT, IRCCS "Casa Sollievo della Sofferenza" Hospital, 71013, San Giovanni Rotondo, Italy
| | - Riccardo Pracella
- Cancer Stem Cells Unit ISBReMIT, IRCCS "Casa Sollievo della Sofferenza" Hospital, 71013, San Giovanni Rotondo, Italy
| | - Riccardo Santolini
- Department of Humanities, University of Urbino Carlo Bo, 61029, Urbino, Italy
| | - Stefano Amatori
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Piazza Rinascimento 7, 61029, Urbino, Italy.
| | - Piero Sestili
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Piazza Rinascimento 7, 61029, Urbino, Italy
| | - Marco B L Rocchi
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Piazza Rinascimento 7, 61029, Urbino, Italy
| | - Pietro Gobbi
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Piazza Rinascimento 7, 61029, Urbino, Italy
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Donati Zeppa S, Amatori S, Sisti D, Gervasi M, Agostini D, Piccoli G, Pazienza V, Gobbi P, Rocchi MBL, Sestili P, Stocchi V. Nine weeks of high-intensity indoor cycling training induced changes in the microbiota composition in non-athlete healthy male college students. J Int Soc Sports Nutr 2021; 18:74. [PMID: 34922581 PMCID: PMC8684107 DOI: 10.1186/s12970-021-00471-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 07/21/2021] [Accepted: 11/19/2021] [Indexed: 12/20/2022] Open
Abstract
Background The gut microbiota constitutes a dynamic microbial system constantly challenged by environmental conditions, including physical exercise. Limited human studies suggest that exercise could play a beneficial role for gut health, increasing microbial diversity, even if the effects of exercise on gut microbial microorganisms depends on its intensity and duration. This study aimed to investigate the effects of nine weeks of high-intensity interval exercise on gut microbiota composition in healthy young adults. Methods The gut microbiota composition of seventeen healthy male college students was analysed before and after nine weeks of high-intensity interval cycling training by 16S rRNA amplicon sequencing. PERMANOVA for repeated measures was used to test pre-post differences in the relative abundance of all taxonomic levels, and correlations between variations in microbial composition and physical and dietary features were also assessed. Results Physical exercise induced changes in microbiota composition, at all taxonomic levels analysed (phyla: F [1, 32]=3.97, p=0.029; classes: F [1, 32]=3.39, p=0.033, orders: F [1, 32]=3.17, p=0.044, families: F [1, 32]=1.54, p=0.037, genera: F [1, 32]=1.46, p=0.015, species: F [1, 32]=1.38, p=0.007). Conversely, no differences were found between pre and post-training conditions for microbial community richness (Chao1: V=105, p=0.06) or diversity (Shannon index: V=62, p=0.52; Simpson index: V=59, p=0.43). Changes in the relative abundance of eighteen genera were correlated to changes of twenty environmental factors grouped in physical features, sport-related features, and dietary features. Conclusions Nine weeks of high-intensity exercise induced modifications in gut microbiota composition in healthy male college students, shifting the gut microbial population towards a healthier microbiome with benefit to human health in general. Supplementary Information The online version contains supplementary material available at 10.1186/s12970-021-00471-z.
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Affiliation(s)
- Sabrina Donati Zeppa
- Department of Biomolecular Sciences, University of Urbino Carlo Bo Piazza Rinascimento 7, 61029, Urbino, Italy
| | - Stefano Amatori
- Department of Biomolecular Sciences, University of Urbino Carlo Bo Piazza Rinascimento 7, 61029, Urbino, Italy
| | - Davide Sisti
- Department of Biomolecular Sciences, University of Urbino Carlo Bo Piazza Rinascimento 7, 61029, Urbino, Italy.
| | - Marco Gervasi
- Department of Biomolecular Sciences, University of Urbino Carlo Bo Piazza Rinascimento 7, 61029, Urbino, Italy
| | - Deborah Agostini
- Department of Biomolecular Sciences, University of Urbino Carlo Bo Piazza Rinascimento 7, 61029, Urbino, Italy
| | - Giovanni Piccoli
- Department of Biomolecular Sciences, University of Urbino Carlo Bo Piazza Rinascimento 7, 61029, Urbino, Italy
| | - Valerio Pazienza
- Division of Gastroenterology "Casa Sollievo della Sofferenza" Hospital, 71013, San Giovanni Rotondo, Italy
| | - Pietro Gobbi
- Department of Biomolecular Sciences, University of Urbino Carlo Bo Piazza Rinascimento 7, 61029, Urbino, Italy
| | - Marco B L Rocchi
- Department of Biomolecular Sciences, University of Urbino Carlo Bo Piazza Rinascimento 7, 61029, Urbino, Italy
| | - Piero Sestili
- Department of Biomolecular Sciences, University of Urbino Carlo Bo Piazza Rinascimento 7, 61029, Urbino, Italy
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Bartoletti-Stella A, Gatta V, Mariani GA, Gobbi P, Falconi M, Manzoli L, Faenza I, Salucci S. Three-Dimensional Virtual Anatomy as a New Approach for Medical Student's Learning. Int J Environ Res Public Health 2021; 18:ijerph182413247. [PMID: 34948857 PMCID: PMC8702207 DOI: 10.3390/ijerph182413247] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/29/2021] [Accepted: 12/06/2021] [Indexed: 12/18/2022]
Abstract
Most medical and health science schools adopt innovative tools to implement the teaching of anatomy to their undergraduate students. The increase in technological resources for educational purposes allows the use of virtual systems in the field of medicine, which can be considered decisive for improving anatomical knowledge, a requisite for safe and competent medical practice. Among these virtual tools, the Anatomage Table 7.0 represents, to date, a pivotal anatomical device for student education and training medical professionals. This review focuses attention on the potential of the Anatomage Table in the anatomical learning process and clinical practice by discussing these topics based on recent publication findings and describing their trends during the COVID-19 pandemic period. The reports documented a great interest in and a positive impact of the use of this technological table by medical students for teaching gross anatomy. Anatomage allows to describe, with accuracy and at high resolution, organ structure, vascularization, and innervation, as well as enables to familiarize with radiological images of real patients by improving knowledge in the radiological and surgical fields. Furthermore, its use can be considered strategic in a pandemic period, since it ensures, through an online platform, the continuation of anatomical and surgical training on dissecting cadavers.
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Affiliation(s)
- Anna Bartoletti-Stella
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40126 Bologna, Italy;
| | - Valentina Gatta
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (V.G.); (G.A.M.); (M.F.); (L.M.); (I.F.)
| | - Giulia Adalgisa Mariani
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (V.G.); (G.A.M.); (M.F.); (L.M.); (I.F.)
| | - Pietro Gobbi
- Department of Biomolecular Sciences (DiSB), Urbino University Carlo Bo, 61029 Urbino, Italy;
| | - Mirella Falconi
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (V.G.); (G.A.M.); (M.F.); (L.M.); (I.F.)
| | - Lucia Manzoli
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (V.G.); (G.A.M.); (M.F.); (L.M.); (I.F.)
| | - Irene Faenza
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (V.G.); (G.A.M.); (M.F.); (L.M.); (I.F.)
| | - Sara Salucci
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (V.G.); (G.A.M.); (M.F.); (L.M.); (I.F.)
- Correspondence:
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Deng S, Gigliobianco MR, Mijit E, Minicucci M, Cortese M, Campisi B, Voinovich D, Battistelli M, Salucci S, Gobbi P, Lupidi G, Zambito G, Mezzanotte L, Censi R, Di Martino P. Dually Cross-Linked Core-Shell Structure Nanohydrogel with Redox-Responsive Degradability for Intracellular Delivery. Pharmaceutics 2021; 13:pharmaceutics13122048. [PMID: 34959330 PMCID: PMC8708258 DOI: 10.3390/pharmaceutics13122048] [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: 10/20/2021] [Revised: 11/20/2021] [Accepted: 11/25/2021] [Indexed: 11/16/2022] Open
Abstract
A redox-responsive nanocarrier is a promising strategy for the intracellular drug release because it protects the payload, prevents its undesirable leakage during extracellular transport, and favors site-specific drug delivery. In this study, we developed a novel redox responsive core-shell structure nanohydrogel prepared by a water in oil nanoemulsion method using two biocompatible synthetic polymers: vinyl sulfonated poly(N-(2-hydroxypropyl) methacrylamide mono/dilactate)-polyethylene glycol-poly(N-(2-hydroxypropyl) methacrylamide mono/dilactate) triblock copolymer, and thiolated hyaluronic acid. The influence on the nanohydrogel particle size and distribution of formulation parameters was investigated by a three-level full factorial design to optimize the preparation conditions. The surface and core-shell morphology of the nanohydrogel were observed by scanning electron microscope, transmission electron microscopy, and further confirmed by Fourier transform infrared spectroscopy and Raman spectroscopy from the standpoint of chemical composition. The redox-responsive biodegradability of the nanohydrogel in reducing environments was determined using glutathione as reducing agent. A nanohydrogel with particle size around 250 nm and polydispersity index around 0.1 is characterized by a thermosensitive shell which jellifies at body temperature and crosslinks at the interface of a redox-responsive hyaluronic acid core via the Michael addition reaction. The nanohydrogel showed good encapsulation efficiency for model macromolecules of different molecular weight (93% for cytochrome C, 47% for horseradish peroxidase, and 90% for bovine serum albumin), capacity to retain the peroxidase-like enzymatic activity (around 90%) of cytochrome C and horseradish peroxidase, and specific redox-responsive release behavior. Additionally, the nanohydrogel exhibited excellent cytocompatibility and internalization efficiency into macrophages. Therefore, the developed core-shell structure nanohydrogel can be considered a promising tool for the potential intracellular delivery of different pharmaceutical applications, including for cancer therapy.
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Affiliation(s)
- Siyuan Deng
- School of Pharmacy, University of Camerino, Via S. Agostino 1, 62032 Camerino, Italy; (S.D.); (M.C.); (G.L.)
| | | | - Emin Mijit
- Physics Division, School of Science and Technology, University of Camerino, Via Madonna delle Carceri 9, 62032 Camerino, Italy; (E.M.); (M.M.)
| | - Marco Minicucci
- Physics Division, School of Science and Technology, University of Camerino, Via Madonna delle Carceri 9, 62032 Camerino, Italy; (E.M.); (M.M.)
| | - Manuela Cortese
- School of Pharmacy, University of Camerino, Via S. Agostino 1, 62032 Camerino, Italy; (S.D.); (M.C.); (G.L.)
| | - Barbara Campisi
- Department of Economic, Business, Mathematic and Statistical Sciences, University of Trieste, 34127 Trieste, Italy;
| | - Dario Voinovich
- Department of Chemical and Pharmaceutical Science, University of Trieste, P. le Europa 1, 34127 Trieste, Italy;
| | - Michela Battistelli
- Institute of Morphological Sciences, University of Urbino, Via Ca’ le Suore 2, 61029 Urbino, Italy; (M.B.); (P.G.)
| | - Sara Salucci
- Cellular Signalling Laboratory, Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy;
| | - Pietro Gobbi
- Institute of Morphological Sciences, University of Urbino, Via Ca’ le Suore 2, 61029 Urbino, Italy; (M.B.); (P.G.)
| | - Giulio Lupidi
- School of Pharmacy, University of Camerino, Via S. Agostino 1, 62032 Camerino, Italy; (S.D.); (M.C.); (G.L.)
| | - Giorgia Zambito
- Department of Radiology and Nuclear Medicine, Erasmus Medical Center, 3015 GD Rotterdam, The Netherlands; (G.Z.); (L.M.)
| | - Laura Mezzanotte
- Department of Radiology and Nuclear Medicine, Erasmus Medical Center, 3015 GD Rotterdam, The Netherlands; (G.Z.); (L.M.)
| | - Roberta Censi
- School of Pharmacy, University of Camerino, Via S. Agostino 1, 62032 Camerino, Italy; (S.D.); (M.C.); (G.L.)
- Correspondence: ; Tel.: +39-0737-40-2231
| | - Piera Di Martino
- Dipartimento di Farmacia, Università “G. D’Annunzio” Chieti e Pescara, Via dei Vestini, 1, 66100 Chieti, Italy;
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Salucci S, Bartoletti Stella A, Battistelli M, Burattini S, Bavelloni A, Cocco LI, Gobbi P, Faenza I. How Inflammation Pathways Contribute to Cell Death in Neuro-Muscular Disorders. Biomolecules 2021; 11:1109. [PMID: 34439778 PMCID: PMC8391499 DOI: 10.3390/biom11081109] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 06/24/2021] [Revised: 07/22/2021] [Accepted: 07/26/2021] [Indexed: 12/13/2022] Open
Abstract
Neuro-muscular disorders include a variety of diseases induced by genetic mutations resulting in muscle weakness and waste, swallowing and breathing difficulties. However, muscle alterations and nerve depletions involve specific molecular and cellular mechanisms which lead to the loss of motor-nerve or skeletal-muscle function, often due to an excessive cell death. Morphological and molecular studies demonstrated that a high number of these disorders seem characterized by an upregulated apoptosis which significantly contributes to the pathology. Cell death involvement is the consequence of some cellular processes that occur during diseases, including mitochondrial dysfunction, protein aggregation, free radical generation, excitotoxicity and inflammation. The latter represents an important mediator of disease progression, which, in the central nervous system, is known as neuroinflammation, characterized by reactive microglia and astroglia, as well the infiltration of peripheral monocytes and lymphocytes. Some of the mechanisms underlying inflammation have been linked to reactive oxygen species accumulation, which trigger mitochondrial genomic and respiratory chain instability, autophagy impairment and finally neuron or muscle cell death. This review discusses the main inflammatory pathways contributing to cell death in neuro-muscular disorders by highlighting the main mechanisms, the knowledge of which appears essential in developing therapeutic strategies to prevent the consequent neuron loss and muscle wasting.
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Affiliation(s)
- Sara Salucci
- Department of Biomolecular Sciences (DiSB), Urbino University Carlo Bo, 61029 Urbino, Italy; (M.B.); (S.B.); (P.G.)
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (L.I.C.); (I.F.)
| | - Anna Bartoletti Stella
- Department of Diagnostic Experimental and Specialty Medicine (DIMES), University of Bologna, 40126 Bologna, Italy;
| | - Michela Battistelli
- Department of Biomolecular Sciences (DiSB), Urbino University Carlo Bo, 61029 Urbino, Italy; (M.B.); (S.B.); (P.G.)
| | - Sabrina Burattini
- Department of Biomolecular Sciences (DiSB), Urbino University Carlo Bo, 61029 Urbino, Italy; (M.B.); (S.B.); (P.G.)
| | - Alberto Bavelloni
- Laboratory of Experimental Oncology, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy;
| | - Lucio Ildebrando Cocco
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (L.I.C.); (I.F.)
| | - Pietro Gobbi
- Department of Biomolecular Sciences (DiSB), Urbino University Carlo Bo, 61029 Urbino, Italy; (M.B.); (S.B.); (P.G.)
| | - Irene Faenza
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (L.I.C.); (I.F.)
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Salucci S, Taurone S, Burattini S, Gobbi P, Clausi J, Battistelli M. Melatonin role in skeletal muscle disorders. Eur Rev Med Pharmacol Sci 2021; 25:1024-1033. [PMID: 33577058 DOI: 10.26355/eurrev_202101_24672] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE This review discusses the impact of the neuro-hormone melatonin on skeletal muscle disorders based on recent literature data with the aim to clarify the utility of the melatonin therapy in patients affected by muscle diseases. MATERIALS AND METHODS It has been pointed out the possible role of melatonin as a food supplement to cure muscular disorders characterized by muscle wasting. Oxidative damage has been proposed as one of the major contributors of the skeletal muscle decline occurring both in physiological and pathological conditions. It is known that excessive oxidant levels lead to mitochondrial damage, and in turn, contribute to apoptotic signaling activation and autophagic impairment. This condition is common in a variety of skeletal muscle disorders. RESULTS The scientific evidence enhances the antioxidant effect of melatonin, that has been demonstrated by several studies both in vitro and in vivo. This effect counteracts mitochondrial impairments and reduces oxidative stress and autophagic alterations in muscle fibers. Its beneficial role in restoring muscle decline, takes place mainly in atrophic conditions correlated to muscle aging. CONCLUSIONS The findings of the research suggest that melatonin may be considered as a valid dietary supplement, useful to prevent muscle wasting, in particular, in sarcopenia-associated diseases.
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Affiliation(s)
- S Salucci
- Department of Biomolecular Sciences, Carlo Bo Urbino University, Urbino, Italy.
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De Caro R, Boscolo-Berto R, Artico M, Bertelli E, Cannas M, Cappello F, Carpino G, Castorina S, Cataldi A, Cavaletti GA, Cinti S, Cocco LI, Cremona O, Crivellato E, De Luca A, Falconi M, Familiari G, Ferri GL, Fornai F, Gesi M, Geuna S, Gibelli DM, Giordano A, Gobbi P, Guerra G, Gulisano M, Macchi V, Macchiarelli G, Manzoli L, Michetti F, Miscia S, Montagnani S, Montella ACM, Morini S, Onori P, Palumbo C, Papa M, Porzionato A, Quacci DE, Raspanti M, Rende M, Rezzani R, Ribatti D, Ripani M, Rodella LF, Rossi P, Sbarbati A, Secchiero P, Sforza C, Stecco C, Toni R, Vercelli A, Vitale M, Zancanaro C, Zauli G, Zecchi S, Anastasi GP, Gaudio E. The Italian law on body donation: A position paper of the Italian College of Anatomists. Ann Anat 2021; 238:151761. [PMID: 34139280 DOI: 10.1016/j.aanat.2021.151761] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [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: 12/18/2020] [Revised: 01/29/2021] [Accepted: 05/03/2021] [Indexed: 10/21/2022]
Abstract
In Italy, recent legislation (Law No. 10/2020) has tuned regulations concerning the donation of one's postmortem body and tissues for study, training, and scientific research purposes. This study discusses several specific issues to optimise the applicability and effectiveness of such an important, novel regulatory setting. Critical issues arise concerning the learners, the type of training and teaching activities that can be planned, the position of academic anatomy institutes, the role of family members in the donation process, the time frame of the donation process, the eligibility of partial donation, or the simultaneous donation of organs and tissues to patients awaiting transplantation. In particular, a universal time limit for donations (i.e., one year) makes it impossible to plan the long-term use of specific body parts, which could be effectively preserved for the advanced teaching and training of medical students and surgeons. The abovementioned conditions lead to the limited use of corpses, thus resulting in the inefficiency of the whole system of body donation. Overall, the donors' scope for the donation of their body could be best honoured by a more flexible and tuneable approach that can be used on a case-by-case basis. Furthermore, it is deemed necessary to closely monitor the events scheduled for corpses in public nonacademic institutions or private enterprises. This paper presents useful insights from Italian anatomists with the hope of providing inspiration for drafting the regulations. In conclusion, this paper focuses on the critical issues derived from the recently introduced Italian law on the donation and use of the body after death and provides suggestions to lawmakers for future implementations.
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Affiliation(s)
- Raffaele De Caro
- Department of Neurosciences, Institute of Human Anatomy, University of Padua, Padua, Italy.
| | - Rafael Boscolo-Berto
- Department of Neurosciences, Institute of Human Anatomy, University of Padua, Padua, Italy.
| | - Marco Artico
- Department of Sensory Organs, "Sapienza" University of Rome, Rome, Italy
| | - Eugenio Bertelli
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Mario Cannas
- Department of Health Sciences, Laboratory of Human Anatomy, University of Piemonte Orientale, Novara, Italy
| | - Francesco Cappello
- Department of Biomedicine and Neurosciences and Advanced Diagnostics, University of Palermo, Palermo, Italy
| | - Guido Carpino
- Department of Movement, Human and Health Sciences, Division of Health Sciences, University of Rome "Foro Italico", Rome, Italy
| | - Sergio Castorina
- Department of Biomedical and Technological Sciences, Section of Human Anatomy and Histology, University of Catania, Catania, Italy
| | - Amelia Cataldi
- Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara, Chieti, Italy
| | - Guido Angelo Cavaletti
- School of Medicine and Surgery, Experimental Neurology Unit, University of Milano-Bicocca, Monza, Italy
| | - Saverio Cinti
- Department of Experimental and Clinical Medicine, Center of Obesity, Marche Polytechnic University, Ancona, Italy
| | | | - Ottavio Cremona
- Division of Neuroscience, San Raffaele Scientific Institute, Milan, Italy
| | - Enrico Crivellato
- Department of Medicine, Section of Human Anatomy, University of Udine, Udine, Italy
| | - Antonio De Luca
- Department of Mental and Physical Health and Preventive Medicine, Section of Human Anatomy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Mirella Falconi
- Department of Biomedical and Neuromotor Sciences, University di Bologna, Bologna, Italy
| | - Giuseppe Familiari
- Department of Anatomical, Histological, Forensic Medicine and Orthopedics Sciences, Sapienza University of Rome, Rome, Italy
| | - Gian Luca Ferri
- Department of Biomedical Sciences, NEF-Laboratory, University of Cagliari, Cagliari, Italy
| | - Francesco Fornai
- Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Pisa, Italy
| | - Marco Gesi
- Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Pisa, Italy
| | - Stefano Geuna
- Department of Clinical and Biological Sciences, University of Turin, Turin, Italy
| | | | - Antonio Giordano
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Pietro Gobbi
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy
| | - Germano Guerra
- Department of Medicine and Health Sciences "Vincenzo Tiberio", University of Molise, Campobasso, Italy
| | - Massimo Gulisano
- Department of Experimental and Clinical Medicine, Anatomy and Histology Section, University of Florence, Florence, Italy
| | - Veronica Macchi
- Department of Neurosciences, Institute of Human Anatomy, University of Padua, Padua, Italy
| | - Guido Macchiarelli
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Lucia Manzoli
- Department of Biomedical and Neuromotor Sciences, University di Bologna, Bologna, Italy
| | - Fabrizio Michetti
- Department of Neuroscience, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Sebastiano Miscia
- Department of Medicine and Aging Sciences, University "G. d'Annunzio" Chieti-Pescara, Chieti, Italy
| | - Stefania Montagnani
- Department of Public Health, School of Medicine and Surgery, University of Naples Federico II, Naples, Italy
| | | | - Sergio Morini
- Laboratory of Microscopical and Ultrastructural Anatomy, "Campus Bio-Medico di Roma" University, Rome, Italy
| | - Paolo Onori
- Department of Anatomical, Histological, Forensic Medicine and Orthopedics Sciences, Sapienza University of Rome, Rome, Italy
| | - Carla Palumbo
- Department of Biomedical, Metabolic and Neural Sciences, Section of Human Morphology, University of Modena and Reggio Emilia, Modena, Italy
| | - Michele Papa
- Department of Mental and Physical Health and Preventive Medicine, Section of Human Anatomy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Andrea Porzionato
- Department of Neurosciences, Institute of Human Anatomy, University of Padua, Padua, Italy
| | | | - Mario Raspanti
- Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - Mario Rende
- Department of Surgery and Biomedical Sciences, Section of Human, Clinical and Forensic Anatomy, University of Perugia, Perugia, Italy
| | - Rita Rezzani
- Department of Clinical and Experimental Sciences, Anatomy and Physiopathology Division, University of Brescia, Brescia, Italy
| | - Domenico Ribatti
- Department of Basic Medical Sciences, Neurosciences and Sensory Organs, University of Bari Medical School, Bari, Italy
| | - Maurizio Ripani
- Department of Movement, Human and Health Sciences, Division of Health Sciences, University of Rome "Foro Italico", Rome, Italy
| | - Luigi Fabrizio Rodella
- Department of Clinical and Experimental Sciences, Anatomy and Physiopathology Division, University of Brescia, Brescia, Italy
| | - Pellegrino Rossi
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Andrea Sbarbati
- Department of Neurosciences, Biomedicine and Movement Sciences, Anatomy and Histology Section, University of Verona, Verona, Italy
| | - Paola Secchiero
- Department of Morphology, Surgery and Experimental Medicine and LTTA Centre, University of Ferrara, Ferrara, Italy
| | - Chiarella Sforza
- Department of Biomedical Science for Health, University of Milan, Milan, Italy
| | - Carla Stecco
- Department of Neurosciences, Institute of Human Anatomy, University of Padua, Padua, Italy
| | - Roberto Toni
- Department of Medicine and Surgery, Section of Human Anatomy, University of Parma, Parma, Italy
| | - Alessandro Vercelli
- Department of Neuroscience Rita Levi Montalcini, University of Turin, Turin, Italy
| | - Marco Vitale
- Department of Medicine and Surgery, Section of Human Anatomy, University of Parma, Parma, Italy
| | - Carlo Zancanaro
- Department of Neurosciences, Biomedicine and Movement Sciences, Anatomy and Histology Section, University of Verona, Verona, Italy
| | - Giorgio Zauli
- Department of Morphology, Surgery and Experimental Medicine and LTTA Centre, University of Ferrara, Ferrara, Italy
| | - Sandra Zecchi
- Department of Experimental and Clinical Medicine, Anatomy and Histology Section, University of Florence, Florence, Italy
| | - Giuseppe Pio Anastasi
- Department of Biomedical, Dental Sciences and Morphological and Functional Images, University of Messina, Messina, Italy
| | - Eugenio Gaudio
- Department of Anatomical, Histological, Forensic Medicine and Orthopedics Sciences, Sapienza University of Rome, Rome, Italy
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Gobbi P, Maravic T, Comba A, Mazzitelli C, Mancuso E, Falconi M, Breschi L, Mazzoni A. Biochemical and immunohistochemical analysis of tissue inhibitor of metalloproteinases-1 in human sound dentin. Clin Oral Investig 2021; 25:5067-5075. [PMID: 33569677 PMCID: PMC8342377 DOI: 10.1007/s00784-021-03819-6] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 01/29/2021] [Indexed: 11/29/2022]
Abstract
Objectives Matrix metalloproteases (MMPs) are a family of enzymes that operate a proteolytic activity at the level of the extracellular matrix. MMPs are regulated by tissue inhibitors of metalloproteinases (TIMPs) that can ubiquitously bind different enzyme forms. The study aims to identify a morfo-functional association between TIMP-1 and MMP-2 and -9 in human dentin. Materials and methods Proteins were extracted from demineralized human sound dentin powder and centrifuged to separate two aliquots with different molecular weights of proteins, higher and lower than 30 kDa. In each aliquot, the evaluation of the presence of TIMP-1/MMP-2 and TIMP-1/MMP-9 was performed using co-immunoprecipitation/immunoblotting analysis. The distribution of TIMP-1, in association with MMP-2 and -9, was investigated using a double immunohistochemical technique. Furthermore, the activity of TIMP-1 was measured by reverse zymography, where acrylamide gel was copolymerized with gelatin and recombinant MMP-2. Results Co-immunoprecipitation/immunoblotting analysis showed the association TIMP-1/MMP-2 and TIMP-1/MMP-9 in human sound dentin. Electron microscopy evaluation revealed a diffuse presence of TIMP-1 tightly associated with MMP-2 and -9. Reverse zymography analysis confirmed that TIMP-1 present in human dentin is active and can bind different MMPs isoforms. Conclusions The strict association of TIMP-1 with MMP-2 and -9 in situ appeared a constant finding in the human sound dentin. Clinical relevance Considering the role of TIMP-1, MMP-2, and MMP-9 within the connective tissues, clinically applicable protocols could be developed in the future to increase or decrease the level of TIMPs in human dentin to regulate the activity of MMPs, contributing to reduce caries progression and collagen degradation.
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Affiliation(s)
- Pietro Gobbi
- Department of Biomolecular Sciences, Carlo Bo Urbino University, Via Aurelio Saffi 2, 61029, Urbino, Italy
| | - Tatjana Maravic
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy
| | - Allegra Comba
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy
| | - Claudia Mazzitelli
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy
| | - Edoardo Mancuso
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy
| | - Mirella Falconi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy.
| | - Annalisa Mazzoni
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy
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Lanza B, Panato A, Valentini L, Rodegher P, Bortolotti F, Battistelli M, Ninfali P, Gobbi P. A morphological analysis of fresh and brine-cured olives attacked by <em>Bactrocera oleae</em> using light microscopy and ESEM-EDS. Eur J Histochem 2020; 64. [PMID: 33029995 PMCID: PMC7520706 DOI: 10.4081/ejh.2020.3149] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 09/02/2020] [Indexed: 12/14/2022] Open
Abstract
The present study investigated the morphology of fresh and brine-cured table olives (TOs) as well as the changes that occur when drupes are attacked by the fruit fly Bactrocera oleae. Morphological analyses were performed using light microscopy (LM) and environmental scanning electron microscopy coupled with energy dispersive spectroscopy (ESEM-EDS). The LM analysis was carried out with bright-field microscopy to evaluate sections stained with either PAS or Azan mixtures as well as unstained sections observed at fluorescence microscopy. The results of the analyses showed that: i) Azan and PAS staining played a useful complementary role, increasing the information provided by the histological analysis. Indeed, in both fresh and brine-cured TOs, epidermal layers and mesocarpal cells were clearly revealed, including sclereid cells. The histological analysis allowed also identifying the presence of secoiridoid-biophenols (seco-BPs) in both cell walls and vacuoles, as well as in the drupe regions that had been attacked by fruit flies, where they were found at higher concentrations; ii) In fresh and brine-cured olives, the excitation at 480 nm revealed the distribution of the fluorophores, among which the seco-BP are enclosed; iii) the ESEM-EDS analysis revealed the natural morphology of fresh olives, including the dimensions of their cell layers and the size and depth of the mechanical barriers of suberized or necrotic cells around the larva holes. In addition, the elemental composition of regions of interest of the drupe was determined in fresh and brine-cured TOs. The results highlighted the effectiveness of combined use of LM and ESEM-EDS in order to obtain a picture, as complete as possible, of the structural morphology of TOs. Such analytical combined approach can be used to support multidisciplinary studies aimed at the selection of new cultivars more resistant to fly attack.
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Affiliation(s)
- Barbara Lanza
- Council for Agricultural Research and Economics (CREA), Research Centre for Engineering and Agro-Food Processing (CREA-IT), Pescara.
| | - Anna Panato
- Department of Diagnostics and Public Health, University of Verona.
| | - Laura Valentini
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino.
| | - Pamela Rodegher
- Department of Diagnostics and Public Health, University of Verona.
| | | | - Michela Battistelli
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino.
| | - Paolino Ninfali
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino.
| | - Pietro Gobbi
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino.
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Ninfali P, Panato A, Bortolotti F, Valentini L, Gobbi P. Morphological analysis of the seeds of three pseudocereals by using light microscopy and ESEM-EDS. Eur J Histochem 2020; 64. [PMID: 31941265 PMCID: PMC6985911 DOI: 10.4081/ejh.2020.3075] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 10/12/2019] [Accepted: 12/30/2019] [Indexed: 01/28/2023] Open
Abstract
The seed morphology of three pseudocereal grains (PSCg), i.e. quinoa (Chenopodium quinoa Willd, Chenopodiaceae), buckwheat (Fagopyrum esculentum Moench, Polygonaceae) and amaranth (Amaranthus caudatus L., Amaranthaceae) was studied by light microscopy (LM) and Environmental Scanning Electron Microscopy coupled with Energy Dispersive Spectroscopy (ESEM-EDS). LM was used with visible light to evaluate either unstained sections or sections stained with Azan mixture, and with fluorescent light. The aim of the study was to compare the architecture of the three seeds in order to connect their morphology with nutrient localization. The Azan staining allowed for the visualization of the seed coat, the embryo - with its shoot apical meristem - and the radicle cell layers, whereas the use of fluorescence microscopy identified the cells rich in phenolic compounds. Finally, the ESEM-EDS analysis revealed that the seed coat of the quinoa was thinner than that of amaranth or buckwheat. In all PSCg, starch granules appeared to be located in large polygonal cells, surrounded by a thin cell wall. Several globoids of proteins were observed in the embryo cells. In the radicle section, the vascular bundles of the procambium were evident, while Amaranth only showed a consistent layer of calcium crystals, located between the embryo and the perisperm. The morphological differences of the three PSCg were discussed in the context of their structural resistance to processing technologies which impact on nutritional value of derived foods.
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Affiliation(s)
- Paolino Ninfali
- Department of Biomolecular Sciences, University of Urbino Carlo Bo.
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Taurone S, Miglietta S, Spoletini M, Feher J, Artico M, Papa V, Matassa R, Familiari G, Gobbi P, Micera A. Age related changes seen in human cornea in formalin fixed sections and on biomicroscopy in living subjects: A comparison. Clin Anat 2019; 33:245-256. [PMID: 31595552 PMCID: PMC7027767 DOI: 10.1002/ca.23488] [Citation(s) in RCA: 10] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 08/21/2019] [Accepted: 09/20/2019] [Indexed: 12/11/2022]
Abstract
The purpose of our experimental research was to assess the effects of aging on the main corneal structures in healthy corneas. Small, human cornea samples were collected from 20 Caucasian subjects during surgery for traumatic lesions to the eye. Ten subjects were adults (mean age 28 years) and 10 were elderly (mean age 76 years). Morphological analysis was carried out using light microscopy and electron microscopy. Another 40 patients (20 young: mean age < 30 years; 20 elderly: mean age > 70 years) were studied in vivo by confocal microscopy. The resulting images were analyzed qualitatively, quantitatively, and statistically. The basic light microscope revealed a decrease in endothelial cell density with age accompanied by an increase in endothelial cell size. Transmission electron microscopy revealed a corneal thinning and a decrease in the number of corneal stromal cells. A marked decrease in stromal nerve fibers was observed in the older subjects compared to the younger ones. Variable pressure scanning electron microscopy (VP‐SEM) was used to make surface morphological observations and to determine the chemical composition of in vivo hydrated human corneas. Our results showed the effects of aging on normal corneal morphology highlighting the structural diversity of the corneal layers and revealing an age‐related reduction in nerve fibers, thus explaining the decreased corneal sensitivity that may be observed in the elderly. Clin. Anat. 33:245–256, 2020. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
| | - Selenia Miglietta
- Department of Anatomical, Histological, Forensic Medicine and Orthopedics Sciences, "Sapienza" University of Rome, Rome, Italy
| | | | - Janos Feher
- Division of Ophthalmology, University of Pecs, Pecs, Hungary
| | - Marco Artico
- Department of Sensory Organs, "Sapienza" University of Rome, Rome, Italy
| | - Veronica Papa
- Department of Motor Sciences and Wellness, University of Naples "Partenope", Naples, Italy
| | - Roberto Matassa
- Department of Anatomical, Histological, Forensic Medicine and Orthopedics Sciences, "Sapienza" University of Rome, Rome, Italy
| | - Giuseppe Familiari
- Department of Anatomical, Histological, Forensic Medicine and Orthopedics Sciences, "Sapienza" University of Rome, Rome, Italy
| | - Pietro Gobbi
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy
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Taurone S, Spoletini M, Chiappetta C, Di Gioia C, Carletti R, Greco A, Agostinelli E, Ralli M, Giangaspero F, Artico M, Pastore FS, Scarpa S, Gobbi P, Di Liddo R. Brain gliomas and growth factors: immunohistochemical, immunofluorescence, flow cytometry and RT-PCR profile in pediatric age. J BIOL REG HOMEOS AG 2019; 33:1451-1463. [PMID: 31507151] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Gliomas represent over 50% of tumors occurring in children. Evidence suggests that glioma stem cells (GSCs), maintained by the transforming growth factor-beta (TGF-β1) pathway, and vascularization substantially contribute to tumor aggressiveness. The identification of important angiogenic factors such as vascular endothelial growth factor (VEGF) may represent a crucial step in the therapeutic approach against tumor growth and metastatic diffusion. The aim of this study was to identify the expression of TGF-β1, VEGF and VEGF-receptors in brain gliomas. Specimens of 16 gliomas and 4 controls from children aged 0.2-14 years were used in the study. Immunohistochemical analysis and gene expression study from specimens was performed. Flow cytometry analysis on GSCs was performed to ascertain the expression of VEGF and VEGF-R2 in the tumor stem cell compartment. Newly diagnosed gliomas mainly showed moderate to strong VEGF immunostaining and increased expression of pro-inflammatory molecules in glioma cells. The proportion of TGF-β1 positive endothelial cells was markedly lower in normal brain vessels compared to tumor vessels. These findings demonstrate that the glioma mass is constituted by a phenotypically immature anoxic central area with a proliferating hypoxic layer; the peripheral area is characterized by cell types with a higher degree of differentiation expressing pro-angiogenic factors. Our data have proven that GSCs play a central role in promoting glioma neovascularization. These findings are useful to understand glioma vascularization, have relevant implications in the therapeutic options and may favor new insights into stem cells biology and suggest therapeutic opportunities for the anti-vascular treatment strategy.
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Affiliation(s)
- S Taurone
- Department of Sensory Organs, "Sapienza" University of Rome, Rome, Italy
| | - M Spoletini
- Department of Anatomy, Histology, Forensic Medicine and Orthopedics, "Sapienza" University of Rome, Rome, Italy
| | - C Chiappetta
- Department of Medical-Surgical Sciences and Biotechnologies,"Sapienza" University of Rome, Rome, Italy
| | - C Di Gioia
- Department of Radiology, Oncology and Pathology, "Sapienza" University of Rome, Rome, Italy
| | - R Carletti
- Department of Radiology, Oncology and Pathology, "Sapienza" University of Rome, Rome, Italy
| | - A Greco
- Department of Sensory Organs, "Sapienza" University of Rome, Rome, Italy
| | - E Agostinelli
- Department of Biochemical Sciences "A. Rossi Fanelli", "Sapienza" University of Rome, Rome, Italy
| | - M Ralli
- Department of Medical-Surgical Sciences and Biotechnologies,"Sapienza" University of Rome, Rome, Italy
| | - F Giangaspero
- Department of Radiology, Oncology and Pathology, "Sapienza" University of Rome, Rome, Italy
- IRCCS Neuromed, Pozzilli (Is), Italy
| | - M Artico
- Department of Sensory Organs, "Sapienza" University of Rome, Rome, Italy
| | - F S Pastore
- Department of Systems Medicine, "Tor Vergata" University of Rome, Rome, Italy
| | - S Scarpa
- Department of Experimental Medicine, "Sapienza" University of Rome, Rome, Italy
| | - P Gobbi
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy
| | - R Di Liddo
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Padua, Italy
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Taurone S, Spoletini M, Ralli M, Gobbi P, Artico M, Imre L, Czakò C, Kovàcs I, Greco A, Micera A. Ocular mucous membrane pemphigoid: a review. Immunol Res 2019; 67:280-289. [DOI: 10.1007/s12026-019-09087-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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17
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Burini D, Salucci S, Fardetti F, Beccarini A, Calvisi V, Gobbi P, Falcieri E, Curzi D. Chondrocalcinosis: a morphofunctional study of crystal deposition in mechanically stressed shoulder soft tissues. Muscles Ligaments Tendons J 2019. [DOI: 10.32098/mltj.04.2018.01] [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: 11/05/2022]
Affiliation(s)
- D. Burini
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - S. Salucci
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - F. Fardetti
- Porta Sole Hospital, Perugia, Italy
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | | | - V. Calvisi
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - P. Gobbi
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - E. Falcieri
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - D. Curzi
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
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18
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Mazzoni A, Maravić T, Tezvergil-Mutluay A, Tjäderhane L, Scaffa PMC, Seseogullari-Dirihan R, Bavelloni A, Gobbi P, Pashley DH, Tay FR, Breschi L. Biochemical and immunohistochemical identification of MMP-7 in human dentin. J Dent 2018; 79:90-95. [PMID: 30367893 DOI: 10.1016/j.jdent.2018.10.008] [Citation(s) in RCA: 6] [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: 08/04/2018] [Revised: 09/23/2018] [Accepted: 10/22/2018] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVES Matrix metalloproteinases (MMPs) are dentinal endogenous enzymes claimed to have a vital role in dentin organic matrix breakdown. The aim of the study was to investigate presence, localization and distribution of MMP-7 in sound human dentin. METHODS Dentin was powdered, demineralized and dissolved in isoelectric focusing buffer. Resolved proteins were transferred to nitrocellulose membranes for western blotting (WB) analyses. For the zymographic analysis, aliquots of dentin protein were electrophoresed in 12% sodium dodecyl sulfate-polyacrylamide gel electrophoresis containing fluorescently labeled gelatin. Further, the concentrations of dentinal MMPs were measured using Fluorescent Microsphere Immunoassay with a human MMP-MAP multiplex kit. Pre- and post-embedding immunolabeling technique was used to investigate the localization and distribution of MMP-7 in dentin. Dentin was cryo-fractured, the fragments partially decalcified and labeled with a primary monoclonal anti-MMP-7 and a secondary antibody conjugated with gold nanoparticles. MMP-7 labelings were identified in the demineralized dentin matrix as highly electron-dense dispersed gold particles. RESULTS WB and zymographic analysis of extracted dentin proteins showed presence of MMP-7 (∼20-28 KDa). Further, MMP-7 was found in the supernatants of the incubated dentin beams using Fluorescent Microsphere Immunoassay. FEI-SEM and TEM analyses established MMP-7 as an intrinsic constituent of the human dentin organic matrix. CONCLUSION This study demonstrated that MMP-7 is an endogenous component of the human dentin fibrillar network. CLINICAL SIGNIFICANCE It is pivotal to understand the underlying processes behind dentin matrix remodeling and degradation in order to develop the most optimal clinical protocols and ensure the longevity of dental restorations.
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Affiliation(s)
- Annalisa Mazzoni
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, Bologna, Italy.
| | - Tatjana Maravić
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, Bologna, Italy.
| | - Arzu Tezvergil-Mutluay
- Department of Restorative Dentistry and Cariology, Adhesive Dentistry Research Group Institute of Dentistry, University of Turku, FI-20014 Turun Yliopisto, Turku Finland; Turku University Hospital, Kiinamyllynkatu 4-8 Turku, Finland.
| | - Leo Tjäderhane
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki University Hospital, Mannerheimintie 172, 00014 Helsinki, Finland; Research Unit of Oral Health Sciences, Medical Research Center Oulu (MRC Oulu), Oulu University Hospital and University of Oulu, Pentti Kaiteran katu 1, Linnanmaa, Oulu, Finland.
| | | | - Roda Seseogullari-Dirihan
- Department of Restorative Dentistry and Cariology, Adhesive Dentistry Research Group Institute of Dentistry, University of Turku, FI-20014 Turun Yliopisto, Turku Finland; Turku University Hospital, Kiinamyllynkatu 4-8 Turku, Finland.
| | - Alberto Bavelloni
- Laboratory of Musculoskeletal Cell Biology, Rizzoli Orthopedic Institute, Via di Barbiano, 1/10, 40136 Bologna, Italy.
| | - Pietro Gobbi
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Via Aurelio Saffi 2, Urbino, Italy.
| | - David H Pashley
- The Dental College of Georgia, Augusta University, 1430 John Wesley Gilbert Drive, Augusta, Georgia, USA.
| | - Franklin R Tay
- The Dental College of Georgia, Augusta University, 1430 John Wesley Gilbert Drive, Augusta, Georgia, USA.
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, Bologna, Italy.
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19
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Antonini E, Zara C, Valentini L, Gobbi P, Ninfali P, Menotta M. Novel insights into pericarp, protein body globoids of aleurone layer, starchy granules of three cereals gained using atomic force microscopy and environmental scanning electronic microscopy. Eur J Histochem 2018; 62:2869. [PMID: 29569870 PMCID: PMC5820524 DOI: 10.4081/ejh.2018.2869] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 11/14/2017] [Revised: 01/10/2018] [Accepted: 01/11/2018] [Indexed: 11/28/2022] Open
Abstract
In this study, we applied Environmental Scanning Electron Microscopy-Energy Dispersive Spectroscopy (ESEM-EDS) and Atomic Force Microscopy (AFM) analysis to three different cereal caryopses: barley, oat and einkorn wheat. The morphological structures, chemical elemental composition and surface characteristics of the three cereals were described. Regarding the morphology, barley showed the thickest pericarp, providing a strong barrier digestion and absorption of nutrients. The aleurone layer of each cereal type contained protein body globoids within its cells. Large type-A and small type-B starchy granules were revealed in the endosperm of barley and einkorn wheat, whereas irregular starchy granules were found in oats. The starchy granule elemental composition, detected by ESEM-EDS, was rather homogenous in the three cereals, whereas the pericarp and protein body globoids showed heterogeneity. In the protein body globoids, oats showed higher P and K concentrations than barley and einkorn wheat. Regarding the topographic profiles, detected by AFM, einkorn wheat starchy granules showed a surface profile that differed significantly from that of oats and barley, which were quite similar to one another. The present work provides insights into the morphological and chemical makeup of the three grains shedding light on the higher bio-accessibility of einkorn wheat nutrients compared to barley and oats, providing important suggestions for human nutrition and technological standpoints.
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20
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Curzi D, Fardetti F, Beccarini A, Salucci S, Burini D, Gesi M, Calvisi V, Falcieri E, Gobbi P. Chondroptotic chondrocytes in the loaded area of chondrocalcinotic cartilage: A clinical proposal? Clin Anat 2017; 31:1188-1192. [PMID: 28929522 DOI: 10.1002/ca.22988] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 09/15/2017] [Indexed: 02/02/2023]
Affiliation(s)
- Davide Curzi
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, 61029, Italy
| | | | | | - Sara Salucci
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, 61029, Italy
| | - Debora Burini
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, 61029, Italy
| | - Marco Gesi
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, 56127, Italy
| | - Vittorio Calvisi
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, 67100, Italy
| | - Elisabetta Falcieri
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, 61029, Italy
| | - Pietro Gobbi
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, 61029, Italy
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21
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Scaffa PMC, Breschi L, Mazzoni A, Vidal CDMP, Curci R, Apolonio F, Gobbi P, Pashley D, Tjäderhane L, Tersariol ILDS, Nascimento FD, Carrilho MR. Co-distribution of cysteine cathepsins and matrix metalloproteases in human dentin. Arch Oral Biol 2016; 74:101-107. [PMID: 27923176 DOI: 10.1016/j.archoralbio.2016.11.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [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] [Received: 03/21/2016] [Revised: 10/26/2016] [Accepted: 11/20/2016] [Indexed: 11/19/2022]
Abstract
It has been hypothesized that cysteine cathepsins (CTs) along with matrix metalloproteases (MMPs) may work in conjunction in the proteolysis of mature dentin matrix. The aim of this study was to verify simultaneously the distribution and presence of cathepsins B (CT-B) and K (CT-K) in partially demineralized dentin; and further to evaluate the activity of CTs and MMPs in the same tissue. The distribution of CT-B and CT-K in sound human dentin was assessed by immunohistochemistry. A double-immunolabeling technique was used to identify, at once, the occurrence of those enzymes in dentin. Activities of CTs and MMPs in dentin extracts were evaluated spectrofluorometrically. In addition, in situ gelatinolytic activity of dentin was assayed by zymography. The results revealed the distribution of CT-B and CT-K along the dentin organic matrix and also indicated co-occurrence of MMPs and CTs in that tissue. The enzyme kinetics studies showed proteolytic activity in dentin extracts for both classes of proteases. Furthermore, it was observed that, at least for sound human dentin matrices, the activity of MMPs seems to be predominant over the CTs one.
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Affiliation(s)
- Polliana Mendes Candia Scaffa
- Faculty of Dentistry at Piracicaba, University of Campinas, Piracicaba, 13414-903, Brazil; Department of Biological Science, Bauru School of Dentistry, University of Sao Paulo, Bauru, SP, 17012-901, Brazil
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, 40126, Italy
| | - Annalisa Mazzoni
- Department of Medical Sciences, University of Trieste, Trieste, 34128, Italy
| | - Cristina de Mattos Pimenta Vidal
- Faculty of Dentistry at Piracicaba, University of Campinas, Piracicaba, 13414-903, Brazil; Department of Operative Dentistry, College of Dentistry, University of Iowa, 801 Newton Rd, Iowa City, IA,52246, USA
| | - Rosa Curci
- IGM-CNR, Unit of Bologna c/o IOR, Bologna, 40136, Italy
| | - Fabianni Apolonio
- Department of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, 60020-181, Brazil
| | - Pietro Gobbi
- Department of SteVA, University "Carlo Bo", Urbino, 61029, Italy
| | - David Pashley
- Emeritus Professor of Oral Biology, Dental College of Georgia, Georgia Health Sciences University, Augusta, Georgia, 30912, USA
| | - Leo Tjäderhane
- Institute of Dentistry, University of Oulu, and Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu FI-90014, Finland; Department of Oral and Maxillofacial Diseases, University of Helsinki, and Helsinki University Hospital, Helsinki FI-00014, Finland
| | - Ivarne Luis Dos Santos Tersariol
- Department of Biochemistry, Federal University of São Paulo, São Paulo, 04021-001, Brazil; Centro Interdisciplinar de Investigação Bioquímica, University of Mogi das Cruzes, Mogi das Cruzes, 08773-520, Brazil
| | - Fábio Dupart Nascimento
- Centro Interdisciplinar de Investigação Bioquímica, University of Mogi das Cruzes, Mogi das Cruzes, 08773-520, Brazil
| | - Marcela Rocha Carrilho
- Biomaterials in Dentistry Program, Anhanguera University São Paulo (UNIAN-SP), São Paulo, 05145-200, Brazil; Biotechnology and Innovation in Health Program, Anhanguera University São Paulo (UNIAN-SP), São Paulo, 05145-200, Brazil.
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22
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Frontalini F, Curzi D, Cesarini E, Canonico B, Giordano FM, De Matteis R, Bernhard JM, Pieretti N, Gu B, Eskelsen JR, Jubb AM, Zhao L, Pierce EM, Gobbi P, Papa S, Coccioni R. Mercury-Pollution Induction of Intracellular Lipid Accumulation and Lysosomal Compartment Amplification in the Benthic Foraminifer Ammonia parkinsoniana. PLoS One 2016; 11:e0162401. [PMID: 27603511 PMCID: PMC5014445 DOI: 10.1371/journal.pone.0162401] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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: 04/19/2016] [Accepted: 07/26/2016] [Indexed: 11/18/2022] Open
Abstract
Heavy metals such as mercury (Hg) pose a significant health hazard through bioaccumulation and biomagnification. By penetrating cell membranes, heavy metal ions may lead to pathological conditions. Here we examined the responses of Ammonia parkinsoniana, a benthic foraminiferan, to different concentrations of Hg in the artificial sea water. Confocal images of untreated and treated specimens using fluorescent probes (Nile Red and Acridine Orange) provided an opportunity for visualizing the intracellular lipid accumulation and acidic compartment regulation. With increased Hg over time, we observed an increased number of lipid droplets, which may have acted as a detoxifying organelle where Hg is sequestered and biologically inactivated. Further, Hg seems to promote the proliferation of lysosomes both in terms of number and dimension that, at the highest level of Hg, resulted in cell death. We report, for the first time, the presence of Hg within the foraminiferal cell: at the basal part of pores, in the organic linings of the foramen/septa, and as cytoplasmic accumulations.
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Affiliation(s)
- Fabrizio Frontalini
- Department of Pure and Applied Sciences, Urbino University, Urbino, Italy
- * E-mail:
| | - Davide Curzi
- Department of Biomolecular Sciences, Urbino University, Urbino, Italy
| | - Erica Cesarini
- Department of Biomolecular Sciences, Urbino University, Urbino, Italy
| | - Barbara Canonico
- Department of Biomolecular Sciences, Urbino University, Urbino, Italy
| | | | - Rita De Matteis
- Department of Biomolecular Sciences, Urbino University, Urbino, Italy
| | - Joan M. Bernhard
- Geology and Geophysics Department, Woods Hole Oceanographic Institution, Woods Hole, MA, United States of America
| | - Nadia Pieretti
- Department of Pure and Applied Sciences, Urbino University, Urbino, Italy
| | - Baohua Gu
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States of America
| | - Jeremy R. Eskelsen
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States of America
| | - Aaron M. Jubb
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States of America
| | - Linduo Zhao
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States of America
| | - Eric M. Pierce
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States of America
| | - Pietro Gobbi
- Department of Biomolecular Sciences, Urbino University, Urbino, Italy
| | - Stefano Papa
- Department of Biomolecular Sciences, Urbino University, Urbino, Italy
| | - Rodolfo Coccioni
- Department of Pure and Applied Sciences, Urbino University, Urbino, Italy
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23
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Visani G, Manti A, Valentini L, Canonico B, Loscocco F, Isidori A, Gabucci E, Gobbi P, Montanari S, Rocchi M, Papa S, Gatti AM. Environmental nanoparticles are significantly over-expressed in acute myeloid leukemia. Leuk Res 2016; 50:50-56. [PMID: 27669365 DOI: 10.1016/j.leukres.2016.09.004] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 08/05/2016] [Accepted: 09/01/2016] [Indexed: 12/29/2022]
Abstract
The increase in the incidence of acute myeloid leukemia (AML) may suggest a possible environmental etiology. PM2.5 was declared by IARC a Class I carcinogen. No report has focused on particulate environmental pollution together with AML. The study investigated the presence and composition of particulate matter in blood with a Scanning Electron Microscope coupled with an Energy Dispersive Spectroscope, a sensor capable of identifying the composition of foreign bodies. 38 peripheral blood samples, 19 AML cases and 19 healthy controls, were analyzed. A significant overload of particulate matter-derived nanoparticles linked or aggregated to blood components was found in AML patients, while almost absent in matched healthy controls. Two-tailed Student's t-test, MANOVA and Principal Component Analysis indicated that the total numbers of aggregates and particles were statistically different between cases and controls (MANOVA, P<0.001 and P=0.009 respectively). The particles detected showed to contain highly-reactive, non-biocompatible and non-biodegradable metals; in particular, micro- and nano-sized particles grouped in organic/inorganic clusters, with statistically higher frequency of a subgroup of elements in AML samples. The demonstration, for the first time, of an overload of nanoparticles linked to blood components in AML patients could be the basis for a possible, novel pathogenetic mechanism for AML development.
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Affiliation(s)
- G Visani
- Hematology and Stem Cell Transplant Center, AORMN, Pesaro, Italy.
| | - A Manti
- Dept. of Earth, Life and Environment Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - L Valentini
- Dept. of Earth, Life and Environment Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - B Canonico
- Dept. of Earth, Life and Environment Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - F Loscocco
- Hematology and Stem Cell Transplant Center, AORMN, Pesaro, Italy
| | - A Isidori
- Hematology and Stem Cell Transplant Center, AORMN, Pesaro, Italy
| | - E Gabucci
- Hematology and Stem Cell Transplant Center, AORMN, Pesaro, Italy
| | - P Gobbi
- Dept. of Earth, Life and Environment Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - S Montanari
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - M Rocchi
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - S Papa
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - A M Gatti
- National Council of Research of Italy, Institute for the Science and Technology of Ceramic Materials, Faenza, Italy
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24
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Cadenaro M, Fontanive L, Navarra CO, Gobbi P, Mazzoni A, Di Lenarda R, Tay FR, Pashley DH, Breschi L. Effect of carboidiimide on thermal denaturation temperature of dentin collagen. Dent Mater 2016; 32:492-8. [PMID: 26764172 DOI: 10.1016/j.dental.2015.12.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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] [Received: 07/07/2015] [Revised: 10/09/2015] [Accepted: 12/07/2015] [Indexed: 11/19/2022]
Abstract
OBJECTIVES 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC) has been shown to cross-link dentin type I collagen. Increased cross-linking usually elevates the glass transition temperature of polymers. The aim of this study was to evaluate the cross-linking reaction promoted by EDC in different aqueous concentrations by measuring the thermal denaturation temperature (Td) of human dentin collagen. METHODS The Td of dehydrated collagen and of insoluble dentin matrix collagen immersed in 0.5M or 1M EDC aqueous solution for different treatment times was obtained using a Differential Scanning Calorimeter (DSC). Specimens were also analyzed by Energy Dispersive X-Ray Spectroscopy. RESULTS EDC-treated dentin collagen showed a significantly higher Td than the untreated specimens when immersed in either 0.5M EDC or 1M EDC for 10min or longer (p<0.05). EDC-treated dentin collagen showed an increase of sulfur and chloride, not detectable in EDC-untreated dentin specimens. Conversely, the relative amount of carbon, nitrogen and oxygen was not modified by treatments. SIGNIFICANCE EDC-treated dentin collagen showed a higher Td than the untreated control at all tested concentrations and immersion times. A higher Td can be considered an indirect indicator of a more resistant and highly cross-linked collagen network. More data are needed to confirm these results.
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Affiliation(s)
- Milena Cadenaro
- Department of Medical Sciences, University of Trieste, Piazza dell'Ospitale 1, I-34129 Trieste, Italy.
| | - Luca Fontanive
- Department of Medical Sciences, University of Trieste, Piazza dell'Ospitale 1, I-34129 Trieste, Italy
| | - Chiara Ottavia Navarra
- Department of Medical Sciences, University of Trieste, Piazza dell'Ospitale 1, I-34129 Trieste, Italy
| | - Pietro Gobbi
- Department of Earth, Life and Environment Sciences (Di.STeVA), University of Urbino, Campus Scientifico Enrico Mattei - Via Ca' Le Suore 2/4, I-61029 Urbino (PU), Italy
| | - Annalisa Mazzoni
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna, Via San Vitale 59, I-40125 Bologna, Italy
| | - Roberto Di Lenarda
- Department of Medical Sciences, University of Trieste, Piazza dell'Ospitale 1, I-34129 Trieste, Italy
| | - Franklin R Tay
- Department of Oral Biology, Georgia Regents University, College of Dental Medicine, Augusta, GA, USA
| | - David H Pashley
- Department of Oral Biology, Georgia Regents University, College of Dental Medicine, Augusta, GA, USA
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna, Via San Vitale 59, I-40125 Bologna, Italy
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25
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Ionescu A, Brambilla E, Travan A, Marsich E, Donati I, Gobbi P, Turco G, Di Lenarda R, Cadenaro M, Paoletti S, Breschi L. Silver–polysaccharide antimicrobial nanocomposite coating for methacrylic surfaces reduces Streptococcus mutans biofilm formation in vitro. J Dent 2015; 43:1483-90. [DOI: 10.1016/j.jdent.2015.10.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Revised: 10/06/2015] [Accepted: 10/09/2015] [Indexed: 10/22/2022] Open
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26
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Salucci S, Burattini S, Falcieri E, Gobbi P. Three-dimensional apoptotic nuclear behavior analyzed by means of Field Emission in Lens Scanning Electron Microscope. Eur J Histochem 2015; 59:2539. [PMID: 26428889 PMCID: PMC4598601 DOI: 10.4081/ejh.2015.2539] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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: 06/03/2015] [Revised: 07/28/2015] [Accepted: 08/01/2015] [Indexed: 11/22/2022] Open
Abstract
Apoptosis is an essential biological function required during embryogenesis, tissue home-ostasis, organ development and immune system regulation. It is an active cell death pathway involved in a variety of pathological conditions. During this process cytoskeletal proteins appear damaged and undergo an enzymatic disassembling, leading to formation of apoptotic features. This study was designed to examine the three-dimensional chromatin behavior and cytoskeleton involvement, in particular actin re-modeling. HL-60 cells, exposed to hyperthermia, a known apoptotic trigger, were examined by means of a Field Emission in Lens Scanning Electron Microscope (FEISEM). Ultrastructural observations revealed in treated cells the presence of apoptotic patterns after hyperthermia trigger. In particular, three-dimensional apoptotic chromatin rearrangements appeared involving the translocation of filamentous actin from cytoplasm to the nucleus. FEISEM immunogold techniques showed actin labeling and its precise three-dimensional localization in the diffuse chromatin, well separated from the condensed one. The actin presence in dispersed chromatin inside the apoptotic nucleus can be considered an important feature, indispensable to permit the apoptotic machinery evolution.
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27
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Salucci S, Ambrogini P, Lattanzi D, Betti M, Gobbi P, Galati C, Galli F, Cuppini R, Minelli A. Maternal dietary loads of alpha-tocopherol increase synapse density and glial synaptic coverage in the hippocampus of adult offspring. Eur J Histochem 2014; 58:2355. [PMID: 24998923 PMCID: PMC4083323 DOI: 10.4081/ejh.2014.2355] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 12/11/2013] [Revised: 03/11/2014] [Accepted: 03/12/2014] [Indexed: 01/12/2023] Open
Abstract
An increased intake of the antioxidant α-Tocopherol (vitamin E) is recommended in complicated pregnancies, to prevent free radical damage to mother and fetus. However, the anti-PKC and antimitotic activity of α-Tocopherol raises concerns about its potential effects on brain development. Recently, we found that maternal dietary loads of α-Tocopherol through pregnancy and lactation cause developmental deficit in hippocampal synaptic plasticity in rat offspring. The defect persisted into adulthood, with behavioral alterations in hippocampus-dependent learning. Here, using the same rat model of maternal supplementation, ultrastructural morphometric studies were carried out to provide mechanistic interpretation to such a functional impairment in adult offspring by the occurrence of long-term changes in density and morphological features of hippocampal synapses. Higher density of axo-spinous synapses was found in CA1 stratum radiatum of α-Tocopherol-exposed rats compared to controls, pointing to a reduced synapse pruning. No morphometric changes were found in synaptic ultrastructural features, i.e., perimeter of axon terminals, length of synaptic specializations, extension of bouton-spine contact. Glia-synapse anatomical relationship was also affected. Heavier astrocytic coverage of synapses was observed in Tocopherol-treated offspring, notably surrounding axon terminals; moreover, the percentage of synapses contacted by astrocytic endfeet at bouton-spine interface (tripartite synapses) was increased. These findings indicate that gestational and neonatal exposure to supranutritional tocopherol intake can result in anatomical changes of offspring hippocampus that last through adulthood. These include a surplus of axo-spinous synapses and an aberrant glia-synapse relationship, which may represent the morphological signature of previously described alterations in synaptic plasticity and hippocampus-dependent learning.
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Bianchi E, Artico M, Di Cristofano C, Leopizzi M, Taurone S, Pucci M, Gobbi P, Mignini F, Petrozza V, Pindinello I, Conconi MT, Della Rocca C. Growth factors, their receptor expression and markers for proliferation of endothelial and neoplastic cells in human osteosarcoma. Int J Immunopathol Pharmacol 2014; 26:621-32. [PMID: 24067459 DOI: 10.1177/039463201302600306] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Osteosarcoma is the most common primary malignant tumour of the bone. Although new therapies continue to be reported, osteosarcoma-related morbidity and mortality remain high. Modern medicine has greatly increased knowledge of the physiopathology of this neoplasm. Novel targets for drug development may be identified through an understanding of the normal molecular processes that are deeply modified in pathological conditions. The aim of the present study is to investigate, by immunohistochemistry, the localisation of different growth factors and of the proliferative marker Ki-67 in order to determine whether these factors are involved in the transformation of osteogenic cells and in the development of human osteosarcoma. We observed a general positivity for NGF - TrKA - NT3 - TrKC - VEGF in the cytoplasm of neoplastic cells and a strong expression for NT4 in the nuclear compartment. TGF-beta was strongly expressed in the extracellular matrix and vascular endothelium. BDNF and TrKB showed a strong immunolabeling in the extracellular matrix. Ki-67/MIB-1 was moderately expressed in the nucleus of neoplastic cells. We believe that these growth factors may be considered potential therapeutic targets in the treatment of osteosarcoma, although proof of this hypothesis requires further investigation.
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Affiliation(s)
- E Bianchi
- Department of Sensory Organs, University of Rome Sapienza, Rome, Italy
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Gobbi P, Turco G, Frassetto A, Fontanive L, Mazzoni A, Teti G, Falconi M, Cadenaro M, Breschi L. Morphological and chemical characterization of cross-linked dentin collagen matrix. Dent Mater 2014. [DOI: 10.1016/j.dental.2014.08.338] [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: 10/24/2022]
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Toti L, Bartalucci A, Ferrucci M, Fulceri F, Lazzeri G, Lenzi P, Soldani P, Gobbi P, La Torre A, Gesi M. High-intensity exercise training induces morphological and biochemical changes in skeletal muscles. Biol Sport 2013; 30:301-9. [PMID: 24744502 PMCID: PMC3944543 DOI: 10.5604/20831862.1077557] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/03/2013] [Indexed: 11/13/2022] Open
Abstract
In the present study we investigated the effect of two different exercise protocols on fibre composition and metabolism of two specific muscles of mice: the quadriceps and the gastrocnemius. Mice were run daily on a motorized treadmill, at a velocity corresponding to 60% or 90% of the maximal running velocity. Blood lactate and body weight were measured during exercise training. We found that at the end of training the body weight significantly increased in high-intensity exercise mice compared to the control group (P=0.0268), whereas it decreased in low-intensity exercise mice compared to controls (P=0.30). In contrast, the food intake was greater in both trained mice compared to controls (P < 0.0001 and P < 0.0001 for low-intensity and high-intensity exercise mice, respectively). These effects were accompanied by a progressive reduction in blood lactate levels at the end of training in both the exercised mice compared with controls (P=0.03 and P < 0.0001 for low-intensity and high-intensity exercise mice, respectively); in particular, blood lactate levels after high-intensity exercise were significantly lower than those measured in low-intensity exercise mice (P=0.0044). Immunoblotting analysis demonstrated that high-intensity exercise training produced a significant increase in the expression of mitochondrial enzymes contained within gastrocnemius and quadriceps muscles. These changes were associated with an increase in the amount of slow fibres in both these muscles of high-intensity exercise mice, as revealed by the counts of slow fibres stained with specific antibodies (P < 0.0001 for the gastrocnemius; P=0.0002 for the quadriceps). Our results demonstrate that high-intensity exercise, in addition to metabolic changes consisting of a decrease in blood lactate and body weight, induces an increase in the mitochondrial enzymes and slow fibres in different skeletal muscles of mice, which indicates an exercise-induced increase in the aerobic metabolism.
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Affiliation(s)
- L Toti
- Department of Traslational Research and New Technology in Medicine and Surgery, University of Pisa, Italy ; These authors contributed equally to this work
| | - A Bartalucci
- Department of Traslational Research and New Technology in Medicine and Surgery, University of Pisa, Italy ; These authors contributed equally to this work
| | - M Ferrucci
- Department of Traslational Research and New Technology in Medicine and Surgery, University of Pisa, Italy
| | - F Fulceri
- Department of Traslational Research and New Technology in Medicine and Surgery, University of Pisa, Italy
| | - G Lazzeri
- Department of Traslational Research and New Technology in Medicine and Surgery, University of Pisa, Italy
| | - P Lenzi
- Department of Traslational Research and New Technology in Medicine and Surgery, University of Pisa, Italy
| | - P Soldani
- Department of Traslational Research and New Technology in Medicine and Surgery, University of Pisa, Italy
| | - P Gobbi
- Department of Earth, Life and Environment Sciences, Human Morphology Division, University of Urbino, Italy
| | - A La Torre
- Department of Traslational Research and New Technology in Medicine and Surgery, University of Pisa, Italy
| | - M Gesi
- Department of Traslational Research and New Technology in Medicine and Surgery, University of Pisa, Italy
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Follo MY, Marmiroli S, Faenza I, Fiume R, Ramazzotti G, Martelli AM, Gobbi P, McCubrey JA, Finelli C, Manzoli FA, Cocco L. Nuclear phospholipase C β1 signaling, epigenetics and treatments in MDS. Adv Biol Regul 2012; 53:2-7. [PMID: 23058275 DOI: 10.1016/j.jbior.2012.09.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 09/13/2012] [Indexed: 11/19/2022]
Abstract
Myelodysplastic syndromes (MDS), clonal hematopoietic stem-cell disorders mainly affecting older adult patients, show ineffective hematopoiesis in one or more of the lineages of the bone marrow. Most MDS are characterized by anemia, and a number of cases progresses to acute myeloid leukemia (AML). Indeed, the molecular mechanisms underlying the MDS evolution to AML are still unclear, even though the nuclear signaling elicited by PI-PLCβ1 has been demonstrated to play an important role in the control of the balance between cell cycle progression and apoptosis in MDS cells. Here we review both the role of epigenetic therapy on PI-PLCβ1 promoter and the changes in PI-PLCβ1 expression in MDS patients treated for anemia.
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MESH Headings
- Apoptosis/drug effects
- Bone Marrow/drug effects
- Bone Marrow/metabolism
- Bone Marrow/pathology
- Cell Cycle/drug effects
- Cell Nucleus/drug effects
- Cell Nucleus/genetics
- Cell Nucleus/metabolism
- Epigenesis, Genetic/drug effects
- Erythropoietin/therapeutic use
- Hematopoietic Stem Cells/drug effects
- Hematopoietic Stem Cells/metabolism
- Hematopoietic Stem Cells/pathology
- Humans
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/etiology
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/pathology
- Myelodysplastic Syndromes/complications
- Myelodysplastic Syndromes/drug therapy
- Myelodysplastic Syndromes/genetics
- Myelodysplastic Syndromes/pathology
- Phosphatidylinositols/metabolism
- Phospholipase C beta/genetics
- Phospholipase C beta/metabolism
- Promoter Regions, Genetic
- Signal Transduction/drug effects
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Affiliation(s)
- Matilde Y Follo
- Cellular Signalling Laboratory, Department of Human Anatomical Sciences, University of Bologna, Bologna, Italy.
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Ackerman M, Brogniez C, Diallo BS, Fiocco G, Gobbi P, Herman M, Jäger M, Lenoble J, Lippens C, Mégie G, Pelon J, Reiter R, Santer R. European validation of SAGE II aerosol profiles. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/jd094id06p08399] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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33
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Mazzoni A, Breschi L, Carrilho M, Nascimento FD, Orsini G, Ruggeri A, Gobbi P, Manzoli L, Tay FR, Pashley DH, Tjäderhane L. A review of the nature, role, and function of dentin non-collagenous proteins. Part II: enzymes, serum proteins, and growth factors. ACTA ACUST UNITED AC 2012. [DOI: 10.1111/j.1601-1546.2012.00268.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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34
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Mazzoni A, Carrilho M, Papa V, Tjäderhane L, Gobbi P, Nucci C, Di Lenarda R, Mazzotti G, Tay FR, Pashley DH, Breschi L. MMP-2 assay within the hybrid layer created by a two-step etch-and-rinse adhesive: Biochemical and immunohistochemical analysis. J Dent 2011; 39:470-7. [DOI: 10.1016/j.jdent.2011.04.004] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Revised: 01/10/2011] [Accepted: 04/15/2011] [Indexed: 11/25/2022] Open
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Mazzoni A, Papa V, Nato F, Carrilho M, Tjäderhane L, Ruggeri A, Gobbi P, Mazzotti G, Tay FR, Pashley DH, Breschi L. Immunohistochemical and biochemical assay of MMP-3 in human dentine. J Dent 2011; 39:231-7. [PMID: 21215789 DOI: 10.1016/j.jdent.2011.01.001] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2010] [Revised: 11/17/2010] [Accepted: 01/03/2011] [Indexed: 10/18/2022] Open
Abstract
OBJECTIVE The function of endogenous MMP-3 and its distribution within the human dentine is unclear. Thus, the aim of the present study was to assay the presence and distribution of MMP-3 within human sound dentine by means of biochemical and immunohistochemical assays. METHODS Powdered dentine from extracted human teeth was prepared and (1) partially demineralised with 1% H(3)PO(4) for 10min or (2) untreated (control). The presence of MMP-3 was measured using a colorimetric assay system (QuantiSir™, Epigentek, USA). Additional cryo-fractured dentine fragments were processed for immunohistochemical identification of MMP-3 under FEI-SEM. Casein-zymography was used to investigate MMP-3 activity. RESULTS MMP-3 detected level was 2.732ng/μL in partially demineralised dentine powder, whilst it increased to 3.280ng/μL in mineralised dentine. The FEI-SEM analysis revealed positive immunolabelling patterns for MMP-3, predominantly localized on the intertubular collagen fibrillar network showing MMP-3 directly or indirectly bound to the collagen fibrils. Casein-zymograms showed positive proteolytic activity for MMP-3 in demineralised dentine powder. CONCLUSION The results of the study clearly revealed the presence and distribution of MMP3 in human sound dentine. Whilst the presence was verified, its role is still unclear. Future studies are needed to investigate the possible involvement of MMP-3 in physiological and pathological condition of the dentine-pulp complex.
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Salucci S, Battistelli M, Burattini S, Squillace C, Canonico B, Gobbi P, Papa S, Falcieri E. C2C12 myoblast sensitivity to different apoptotic chemical triggers. Micron 2010; 41:966-73. [DOI: 10.1016/j.micron.2010.07.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Revised: 07/02/2010] [Accepted: 07/02/2010] [Indexed: 11/26/2022]
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Mazzoni A, Pashley DH, Tay FR, Gobbi P, Orsini G, Ruggeri A, Carrilho M, Tjäderhane L, Di Lenarda R, Breschi L. Immunohistochemical identification of MMP‐2 and MMP‐9 in human dentin: Correlative FEI‐SEM/TEM analysis. J Biomed Mater Res A 2008; 88:697-703. [DOI: 10.1002/jbm.a.31920] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.9] [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)
- Annalisa Mazzoni
- Department of SAU and FAL, University of Bologna, Bologna, Italy
| | - David H. Pashley
- Department of Oral Biology and Maxillofacial Pathology, School of Dentistry, Medical College of Georgia, Augusta, Georgia 30912‐1129
| | - Franklin R. Tay
- Department of Oral Biology and Maxillofacial Pathology, School of Dentistry, Medical College of Georgia, Augusta, Georgia 30912‐1129
| | - Pietro Gobbi
- Institute of Morphological Sciences; University of Urbino “Carlo Bo”, Urbino, Italy
| | - Giovanna Orsini
- Department of Biomorphology, University of Chieti‐Pescara, Chieti, Italy
| | | | - Marcela Carrilho
- Department of Oral Biology and Maxillofacial Pathology, School of Dentistry, Medical College of Georgia, Augusta, Georgia 30912‐1129
- Department of Restorative Dentistry, Dental Materials Area, University of Campinas, Piracicaba School of Dentistry, Piracicaba/SP, Brazil
| | - Leo Tjäderhane
- Institute of Dentistry, University of Helsinki, Department of Oral and Maxillofacial Diseases, Helsinki University Central Hospital (HUCH), Helsinki, Finland
| | - Roberto Di Lenarda
- Department of Biomedicine, Unit of Dental Sciences and Biomaterials, University of Trieste, Trieste, Italy
| | - Lorenzo Breschi
- Department of Biomedicine, Unit of Dental Sciences and Biomaterials, University of Trieste, Trieste, Italy
- IGM‐CNR, Unit of Bologna c/o IOR, Bologna, Italy
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Pavone V, Ricardi U, Luminari S, Gobbi P, Federico M, Baldini L, Iannitto E, Ucci G, Marcheselli L, Orsucci L, Angelucci E, Liberati M, Gavarotti P, Levis A. ABVD plus radiotherapy versus EVE plus radiotherapy in unfavorable stage IA and IIA Hodgkin's lymphoma: results from an Intergruppo Italiano Linfomi randomized study. Ann Oncol 2008; 19:763-8. [PMID: 18180244 DOI: 10.1093/annonc/mdm575] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND In 1997, the Intergruppo Italiano Linfomi started a randomized trial to evaluate, in unfavorable stage IA and IIA Hodgkin's lymphoma (HL) patients, the efficacy and toxicity of the low toxic epirubicin, vinblastine and etoposide (EVE) regimen followed by involved field radiotherapy in comparison to the gold standard doxorubicin, bleomycin, vinblastine and dacarbazine (ABVD) regimen followed by the same radiotherapy program. PATIENTS AND METHODS Patients should be younger than 65 years with unfavorable stage IA and IIA HL (i.e. stage IA or IIA with bulky disease and/or subdiaphragmatic disease, erythrocyte sedimentation rate higher than 40, extranodal (E) involvement, hilar involvement and more than three involved lymph node areas). RESULTS Ninety-two patients were allocated to the ABVD arm and 89 to the EVE arm. Complete remission (CR) rates at the end of treatment program [chemotherapy (CT) + RT] were 93% and 92% for ABVD and EVE arms, respectively (P = NS). The 5-year relapse-free survival (RFS) rate was 95% for ABVD and 78% for EVE (P < 0.05). As a consequence of the different relapse rate, the 5-year failure-free survival (FFS) rate was significantly better for ABVD (90%) than for EVE (73%) arm (P < 0.05). No differences in terms of overall survival (OS) were observed for the two study arms. CONCLUSIONS In unfavorable stage IA and IIA HL patients, no differences were observed between ABVD and EVE arms in terms of CR rate and OS. EVE CT, however, was significantly worse than ABVD in terms of RFS and FFS and cannot be recommended as initial treatment for HL.
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Affiliation(s)
- V Pavone
- Division of Haematology, Ospedale G. Panico, Tricase, Lecce, Italy.
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Gobbi P, Castaldo P, Minelli A, Salucci S, Magi S, Corcione E, Amoroso S. Mitochondrial localization of Na+/Ca2+ exchangers NCX1–3 in neurons and astrocytes of adult rat brain in situ. Pharmacol Res 2007; 56:556-65. [DOI: 10.1016/j.phrs.2007.10.005] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2007] [Revised: 10/06/2007] [Accepted: 10/10/2007] [Indexed: 11/28/2022]
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Minelli A, Castaldo P, Gobbi P, Salucci S, Magi S, Amoroso S. Cellular and subcellular localization of Na+–Ca2+ exchanger protein isoforms, NCX1, NCX2, and NCX3 in cerebral cortex and hippocampus of adult rat. Cell Calcium 2007; 41:221-34. [PMID: 16914199 DOI: 10.1016/j.ceca.2006.06.004] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2006] [Revised: 05/24/2006] [Accepted: 06/13/2006] [Indexed: 11/19/2022]
Abstract
Na(+)-Ca(2+) exchanger (NCX) controls cytosolic Ca(2+) and Na(+) concentrations ([Ca(2+)](i) and [Na(+)](i)) in eukaryotic cells. Here we investigated by immunocytochemistry the cellular and subcellular localization of the three known NCX isoforms, NCX1, NCX2 and NCX3, in adult rat neocortex and hippocampus. NCX1-3 were widely expressed in both brain areas: NCX1 immunoreactivity (ir) was exclusively associated to neuropilar puncta, while NCX2-3 were also detected in neuronal somata and dendrites. NCX1-3 ir was often identified around blood vessels. In both neocortex and hippocampus, all NCX isoforms were prominently expressed in dendrites and dendritic spines contacted by asymmetric axon terminals, whereas they were poorly expressed in presynaptic boutons. In addition, NCX1-3 ir was detected in astrocytes, notably in distal processes ensheathing excitatory synapses. All NCXs were expressed in perivascular astrocytic endfeet and endothelial cells. The robust expression of NCX1-3 in heterogeneous cell types in the brain in situ emphasizes their role in handling Ca(2+) and Na(+) in both excitable and non-excitable cells. Perisynaptic localization of NCX1-3 in dendrites and spines indicates that all isoforms are favourably located for buffering [Ca(2+)](i) in excitatory postsynaptic sites. NCX1-3 expressed in perisynaptic glial processes may participate in shaping astrocytic [Ca(2+)](i) transients evoked by ongoing synaptic activity.
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Affiliation(s)
- Andrea Minelli
- Institute of Physiological Sciences, University of Urbino Carlo Bo, Urbino, Italy
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Abstract
In this study, we analyzed the chromatin ultrastructure in interphase cells after different chemical fixations. In light of the fact that there is little information regarding the fixation of biological samples in combination with molecular biology methods (such as DNA extraction and in situ hybridization methods) we analyzed the ultrastructure of chromatin in interphase cells fixed with different fixatives and tested under the same conditions for both DNA extraction and in situ hybridization. The results showed that, among the different combinations and concentrations we analyzed, the solution of 4% paraformaldehyde/0.1% glutaraldehyde was the best compromise in order to achieve a well-preserved morphology, successful DNA extraction, and specific signaling of in situ hybridization, suggesting a low interference of this fixative with the chromatin organization.
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Affiliation(s)
- Mirella Falconi
- Department of Anatomical Sciences, University of Bologna, Italy
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Morabito F, Stelitano C, Luminari S, Mammi C, Marcheselli L, Callea V, Gentile M, Polimeno G, Merli F, Molica S, Gobbi P, Angrilli F, Brugiatelli M, Federico M. The role of high-dose therapy and autologous stem cell transplantation in patients with primary refractory Hodgkin's lymphoma: a report from the Gruppo Italiano per lo Studio dei Linfomi (GISL). Bone Marrow Transplant 2005; 37:283-8. [PMID: 16327815 DOI: 10.1038/sj.bmt.1705235] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [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: 11/09/2022]
Abstract
GISL recently conducted an exhaustive survey of 1078 patients with Hodgkin's Lymphoma (HL) enrolled between 1988 and 2002 in different prospective trials. Treatment failure was observed in 82 out of 1078 patients; of these 82 patients with refractory HL, complete information was available for 72, who form the evaluable population of the present study. After the initial therapy failure, 51 patients were treated with conventional salvage chemotherapy (CC) (n = 24) or high-dose chemotherapy (HDC) (n = 27); 4-year overall survival (OS) was 81% in the HDC group versus 38% in the CC group (P = 0.019). The remaining 21 patients had rapidly progressive disease and died. After a median follow-up of 2.8 years, the projected OS for all 72 patients is 58 and 49% at 3 and 5 years, respectively. Age <45 years, the absence of systemic symptoms and a PS <1 predicted a significantly longer OS. Interestingly, the majority of patients with two or three negative prognostic factors did not receive potentially curative therapy. In conclusion, HDC seems to be a reasonable option for selected patients with refractory HL, although the majority of them did not receive a transplant. Finally, patients with a high-risk score had little chance of receiving potentially curative treatment.
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Affiliation(s)
- F Morabito
- Unità Operativa di Ematologia, Presidio Ospedaliero dell'Annunziata, Azienda Ospedaliera, Cosenza, Italy.
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Battistelli M, De Sanctis R, De Bellis R, Cucchiarini L, Dachà M, Gobbi P. Rhodiola rosea as antioxidant in red blood cells: ultrastructural and hemolytic behaviour. Eur J Histochem 2005; 49:243-54. [PMID: 16216810] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023] Open
Abstract
Rhodiola rosea L. (Crassulaceae) is a plant that lives at high altitude in Europe and Asia, widely used for its high capacity to increase the organism resistance to different stress conditions. Although a few international literature supports these effects, today R. rosea has become a common component of many dietary supplements also in the Western world. The aim of the present study was to investigate the effect of the R. rosea roots aqueous extract on in vitro human erythrocytes exposed to hypochlorous acid (HOCl)-oxidative stress. Several damages occur in human erythrocytes exposed in vitro to HOCl, among these membrane protein and lipid modifications, shifting from the discocyte shape to the echinocyte one, and determining lysis ultimately. Therefore, in the present work, the evaluation of the antioxidant capacity of the Rhodiola extract has been carried out by means of scanning electron microscopy and of hemolytic behaviour on human erythrocytes exposed to HOCl in the presence of increasing doses of the aqueous extract in different experimental environments (co-incubation and subsequent incubations). The results obtained are consistent with a significant protection of the extract in presence of the oxidative agent, but a cautionary note emerges from the analysis of the data related to the cell exposition to the plant extract in the absence of any induced oxidative stress. In fact, the addition to erythrocyte of high doses of R. rosea extract always determines severe alterations of the cell shape.
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Affiliation(s)
- M Battistelli
- Istituto di Scienze Morfologiche, Istituto di Chimica Biologica Giorgio Fornaini, Università degli Studi di Urbino Carlo Bo, Urbino (PU), Italy
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Canonico B, Zamai L, Burattini S, Granger V, Mannello F, Gobbi P, Felici C, Falcieri E, Reilly JT, Barnett D, Papa S. Evaluation of leukocyte stabilisation in TransFix®-treated blood samples by flow cytometry and transmission electron microscopy. J Immunol Methods 2004; 295:67-78. [PMID: 15627612 DOI: 10.1016/j.jim.2004.09.013] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2004] [Revised: 07/08/2004] [Accepted: 09/09/2004] [Indexed: 10/26/2022]
Abstract
In this report, we have evaluated the effects of a TransFix-based stabilisation technique on leukocyte scatter characteristics, immunophenotyping, membrane permeability, absolute cell counting and morphology to extend previously reported flow cytometric data focused on the lymphocyte population. We show that scatter characteristics, immunophenotyping and absolute cell counting are well preserved, particularly in the lymphocyte population. Nevertheless, a general increase in membrane permeability, evaluated by propidium iodide (PI) uptake, was observed in TransFix-treated leukocyte subsets. Ultrastructural observations show selective morphological preservation (up to 10 days of storage) of lymphocytes and, to a lesser extent, of monocytes. In contrast, granulocytes have necrosis-like features, although the plasma membrane seems well preserved. Therefore, electron microscopy observations reflect modifications induced in different cell populations as evidenced by flow cytometry (FC). The data indicate that this short-term stabilisation method is particularly suitable for the analysis of human lymphocytes and it is a good procedure for quality control programmes for inter- and intra-laboratory performance evaluation; good results are obtained with respect to antigen definition and absolute cell counting procedures. Any apoptotic pathways in leukocyte subsets are blocked for at least 10 days.
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Affiliation(s)
- B Canonico
- Centro di Citometria e Citomorfologia, Università di Urbino "Carlo Bo", Urbino, Italy.
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Breschi L, Prati C, Gobbi P, Pashley D, Mazzotti G, Teti G, Perdigão J. Immunohistochemical analysis of collagen fibrils within the hybrid layer: a FEISEM study. Oper Dent 2004; 29:538-46. [PMID: 15470876] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
This study evaluated the immunohistochemical labeling pattern of dentin collagen fibrils within hybrid layers created by different bonding systems using high resolution SEM. Four different adhesive materials, including self-etching and total-etching systems, were examined: Prime & Bond NT, OptiBond SOLO Plus, Single Bond and Clearfil Protect Bond. All materials were applied to the dentin of extracted human third molars. After cutting the bonded specimens transversely, an anti-collagen type I antibody was incubated on the surface of the dentin-adhesive interface and gold-conjugated secondary antibody was applied to reveal collagen labeling under high resolution SEM. The hybrid layers showed a significant number of collagen fibrils embedded in the resin matrix. The presence of exposed dentin collagen fibrils, as determined by positive labeling with an anti-type I collagen monoclonal antibody, is considered an indication of the presence of incompletely embedded fibrils and, thus, the quality of dentin matrix hybridization. The hybrid layers produced by total-etching systems showed higher labeling compared to those produced by the self-etching system. Positive collagen labeling was also found along the resin tags produced by total-etching adhesive systems.
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Affiliation(s)
- Lorenzo Breschi
- Dipartimento di Scienze Chirurgiche Specialistiche, University of Trieste, Trieste, Italy.
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Artico M, Lorenzini D, Mancini P, Gobbi P, Carloia S, David V. Radiological evidence of anatomical variation of the inferior vena cava: Report of two cases. Surg Radiol Anat 2004; 26:153-6. [PMID: 14600789 DOI: 10.1007/s00276-003-0192-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2003] [Accepted: 07/10/2003] [Indexed: 10/26/2022]
Abstract
The inferior vena cava (IVC) is a retroperitoneal key structure whose location and integrity must be checked in every scan. A number of studies are reported in the literature concerning congenital variations of the inferior vena cava. Anatomical variations of this main venous trunk are relatively infrequent clinical findings during surgery or diagnostic procedures in patients without symptoms such as an aberrant venous drainage or abdominal pain. Among the other imaging techniques, computerized tomography is a non-invasive, effective technique for diagnosing diseases of the retroperitoneal space and, particularly, for detecting anomalies of the main vessels, such as the aorta or IVC, in asymptomatic patients. We present two cases of IVC variation as an incidental finding in patients studied by means of CT scan for the gradation of kidney carcinoma and pancreatic cancer respectively. Two different configurations of the system of the IVC (agenesis of the IVC with hypertrophy of the azygos vein and a double IVC respectively) were found in our cases. The embryological development of the IVC system is discussed, bearing in mind that knowledge of the different variations is important in order to avoid major surgical complications.
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Affiliation(s)
- M Artico
- Section of Human Anatomy of the Department of Pharmacology of Natural Substances and General Physiology, University La Sapienza, P. le Aldo Moro 5, 00185 Rome, Italy.
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Affiliation(s)
- Stefan Thalhammer
- Institute of Cristallography, Ludwig Maximilians Universität, Munich, Germany
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Abstract
Immunocytochemical analysis is a fundamental and selective technique for identifying different molecular components of human dental structure. The hypothesis tested here is that the application of different etching solutions on dentin does not hinder collagen fibrils and proteoglycans from maintaining their immunochemical antigenicity. Human dentin disks were treated with 0.5M of EDTA, citric acid, maleic acid, or phosphoric acid (for 15 or 30 s). A double-immunolabeling technique was performed to identify, simultaneously, collagen fibrils and chondroitin sulfate. The use of different acids resulted in different degrees of labeling. Maleic and citric acids revealed a diffuse and intense labeling for both collagen fibrils and proteoglycans. The use of phosphoric acid on dentin showed a massive coagulation of the proteoglycans (15 s) or very low labeling (30 s). These data clarify that the use of acids on dentin components is able to modify their antigenicity. Moreover, the double-labeling immunocytochemical technique allows understanding of the spatial relationships between the collagen fibrils and proteoglycans of the dentin matrix.
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Affiliation(s)
- L Breschi
- Department of Social Sciences, University of Trieste, Trieste, Italy.
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Breschi L, Perdigão J, Gobbi P, Mazzotti G, Falconi M, Lopes M. Immunocytochemical identification of type I collagen in acid-etched dentin. J Biomed Mater Res A 2003; 66:764-9. [PMID: 12926027 DOI: 10.1002/jbm.a.10073] [Citation(s) in RCA: 28] [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: 11/06/2022]
Abstract
The hypothesis tested in this study is that the application of phosphoric acid prevents collagen fibrils (CF) from maintaining their structural morphology, as assessed by their immunochemical antigenicity. Dentin was conditioned with EDTA and with 35% H3PO4 for 15, 30, and 60 s. For a control there was no treatment. A pre-embedding immunohistochemical procedure was evaluated under high-resolution SEM and a postembedding immunolocalization technique was performed on ultrathin sections at TEM level. Conditioning with EDTA resulted in a weaker labeling signal than for dentin conditioned with H3PO4. The most intense labeling was observed after dentin had been etched with H3PO4 for 15 s. The least intensive labeling was evident when the acid was applied for 30 s or for 60 s. A very weak signal was detected on the untreated dentin surface. These results provide evidence that a 15-s application of 35% H3PO4 causes mineral dissolution of the crystals enveloping the superficial CF without damaging the ultrastructure of the CF while longer applications of 35% H3PO4 cause alterations in the CF that decrease their antigenicity.
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Affiliation(s)
- Lorenzo Breschi
- Dipartimento di Scienze Chirurgiche Specialistiche, University of Trieste, Trieste, Italy.
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Breschi L, Gobbi P, Chersoni S, Mazzotti G, Prati C. Effects of different acid and sodium hypochlorite treatments on dentin collagen: a FEISEM analysis. Am J Dent 2003; 16 Spec No:77A-81A. [PMID: 14674505] [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: 04/27/2023]
Abstract
PURPOSE To evaluate if different acid treatments of dentin surface might remove different amount of mineralized dentin, thus exposing and modifying the CF network. METHODS Dentin disks prepared from human third molars with a low-speed diamond saw were etched for 15 seconds with the tested acids: citric acid 10%, maleic acid 10%, 2.5% oxalic acid, 35% phosphoric acid and 24% EDTA gel. Specimens were then submitted to a 5% solution of NaOCl for 2 minutes or 5 minutes, fixed, and observed utilizing a field emission in lens SEM (FEISEM). Control specimens were also prepared by omitting the etching agent and/or the NaOCl solution. RESULTS The different acid treatments created specific dentin morphological pattern. CF exposure was in relationship with the acid used. The NaOCl solution greatly affects the acid etched dentin by removing the CF, nevertheless the effect of NaOCl was greatly influenced by the previous acid treatment.
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Affiliation(s)
- Lorenzo Breschi
- Clinica Odontostomatologica, Department of Surgical Sciences, University of Trieste, Trieste, Italy.
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