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Onnis C, Virmani R, Kawai K, Nardi V, Lerman A, Cademartiri F, Scicolone R, Boi A, Congiu T, Faa G, Libby P, Saba L. Coronary Artery Calcification: Current Concepts and Clinical Implications. Circulation 2024; 149:251-266. [PMID: 38227718 PMCID: PMC10794033 DOI: 10.1161/circulationaha.123.065657] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Coronary artery calcification (CAC) accompanies the development of advanced atherosclerosis. Its role in atherosclerosis holds great interest because the presence and burden of coronary calcification provide direct evidence of the presence and extent of coronary artery disease; furthermore, CAC predicts future events independently of concomitant conventional cardiovascular risk factors and to a greater extent than any other noninvasive biomarker of this disease. Nevertheless, the relationship between CAC and the susceptibility of a plaque to provoke a thrombotic event remains incompletely understood. This review summarizes the current understanding and literature on CAC. It outlines the pathophysiology of CAC and reviews laboratory, histopathological, and genetic studies, as well as imaging findings, to characterize different types of calcification and to elucidate their implications. Some patterns of calcification such as microcalcification portend increased risk of rupture and cardiovascular events and may improve prognosis assessment noninvasively. However, contemporary computed tomography cannot assess early microcalcification. Limited spatial resolution and blooming artifacts may hinder estimation of degree of coronary artery stenosis. Technical advances such as photon counting detectors and combination with nuclear approaches (eg, NaF imaging) promise to improve the performance of cardiac computed tomography. These innovations may speed achieving the ultimate goal of providing noninvasively specific and clinically actionable information.
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Affiliation(s)
- Carlotta Onnis
- Department of Radiology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari – Polo di Monserrato s.s. 554 Monserrato (Cagliari) 09045, ITALY
| | - Renu Virmani
- Department of Cardiovascular Pathology, CVPath Institute, 19 Firstfield Road, Gaithersburg, MD
| | - Kenji Kawai
- Department of Cardiovascular Pathology, CVPath Institute, 19 Firstfield Road, Gaithersburg, MD
| | - Valentina Nardi
- Department of Cardiovascular Diseases, Mayo Clinic, Rochester, MN
| | - Amir Lerman
- Department of Cardiovascular Diseases, Mayo Clinic, Rochester, MN
| | | | - Roberta Scicolone
- Department of Radiology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari – Polo di Monserrato s.s. 554 Monserrato (Cagliari) 09045, ITALY
| | - Alberto Boi
- Department of Cardiology, Azienda Ospedaliera Brotzu, Cagliari Italy
| | - Terenzio Congiu
- Department of Pathology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari – Ospedale San Giovanni di Dio (Cagliari) 09100 ITALY
| | - Gavino Faa
- Department of Pathology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari – Ospedale San Giovanni di Dio (Cagliari) 09100 ITALY
| | - Peter Libby
- Division of Cardiovascular Medicine, Brigham and Women's Hospital, Boston, MA
| | - Luca Saba
- Department of Radiology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari – Polo di Monserrato s.s. 554 Monserrato (Cagliari) 09045, ITALY
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Felici G, Lachowicz JI, Milia S, Cannizzaro E, Cirrincione L, Congiu T, Jaremko M, Campagna M, Lecca LI. A pilot study of occupational exposure to ultrafine particles during 3D printing in research laboratories. Front Public Health 2023; 11:1144475. [PMID: 37333549 PMCID: PMC10272752 DOI: 10.3389/fpubh.2023.1144475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 05/11/2023] [Indexed: 06/20/2023] Open
Abstract
Introduction 3D printing is increasingly present in research environments, and could pose health risks to users due to air pollution and particulate emissions. We evaluated the nanoparticulate emissions of two different 3D printers, utilizing either fused filament fabrication with polylactic acid, or stereolithography (SLA) with light curing resin. Methods Nanoparticulate emissions were evaluated in two different research environments, both by environmental measurements in the laboratory and by personal sampling. Results The SLA printer had higher nanoparticulate emissions, with an average concentration of 4,091 parts/cm3, versus 2,203 particles/cm3 for the fused filament fabrication printer. The collected particulate matter had variable morphology and elemental composition with a preponderance of carbon, sulfur and oxygen, the main byproducts. Discussion Our study implies that when considering the health risks of particulate emissions from 3D printing in research laboratories, attention should be given to the materials used and the type of 3D printer.
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Affiliation(s)
- Giorgio Felici
- Department of Medical Sciences and Public Health, Division of Occupational Medicine, University of Cagliari, Cittadella Universitaria, Cagliari, Italy
| | - Joanna Izabela Lachowicz
- Department of Medical Sciences and Public Health, Division of Occupational Medicine, University of Cagliari, Cittadella Universitaria, Cagliari, Italy
| | - Simone Milia
- Department of Medical Sciences and Public Health, Division of Occupational Medicine, University of Cagliari, Cittadella Universitaria, Cagliari, Italy
| | - Emanuele Cannizzaro
- Department of Sciences for Health Promotion and Mother and Child Care “Giuseppe D’Alessandro”, University of Palermo, Palermo, Italy
| | - Luigi Cirrincione
- Department of Sciences for Health Promotion and Mother and Child Care “Giuseppe D’Alessandro”, University of Palermo, Palermo, Italy
| | - Terenzio Congiu
- Department of Medical Sciences and Public Health, Division of Occupational Medicine, University of Cagliari, Cittadella Universitaria, Cagliari, Italy
| | - Mariusz Jaremko
- Smart-Health Initiative (SHI) and Red Sea Research Center (RSRC), Division of Biological and Environmental Sciences and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Marcello Campagna
- Department of Medical Sciences and Public Health, Division of Occupational Medicine, University of Cagliari, Cittadella Universitaria, Cagliari, Italy
| | - Luigi Isaia Lecca
- Department of Medical Sciences and Public Health, Division of Occupational Medicine, University of Cagliari, Cittadella Universitaria, Cagliari, Italy
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Piludu M, Pichiri G, Coni P, Piras M, Congiu T, Faa G, Lachowicz JI. Cell starvation increases uptake of extracellular Thymosin β4 and its complexes with calcium. Int Immunopharmacol 2023; 116:109743. [PMID: 36706591 DOI: 10.1016/j.intimp.2023.109743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 01/09/2023] [Accepted: 01/09/2023] [Indexed: 01/26/2023]
Abstract
Cell metastasis is the main cause of cancer mortality. Inhibiting early events during cell metastasis and invasion could significantly improve cancer prognosis, but the initial mechanisms of cell transition and migration are barely known. Calcium regulates cell migration, whilst Thymosin β4 is a G-actin and iron binding peptide associated with tumor metastasis and ferroptosis. Under normal cell growth conditions, intracellular free calcium ions and Thymosin β4 concentrations are strictly regulated, and are not influenced by extracellular supplementation. However, cell starvation decreases intracellular Thymosin β4 and increases extracellular peptide uptake above the normal range. Unexpectedly, cell starvation significantly increases internalization of extracellular Ca2+/Thymosin β4 complexes. Elucidating the role of Ca2+/Thymosin β4 in the early events of metastasis will likely be important in the future to develop therapies targeting metastasis.
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Affiliation(s)
- Marco Piludu
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | - Giuseppina Pichiri
- Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy
| | - Pierpaolo Coni
- Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy
| | - Monica Piras
- Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy
| | - Terenzio Congiu
- Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy
| | - Gavino Faa
- Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy
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Piras M, Fanni D, Congiu T, Cau F, Piludu M, Coni S, Coni P, Pichiri G, Orgerie J, Scano A, Orrù G, Gerosa C, Faa G. CD44 is highly expressed in stem/progenitor cells originating the intervertebral discs in the human notochord. Eur Rev Med Pharmacol Sci 2022; 26:8502-8507. [PMID: 36459031 DOI: 10.26355/eurrev_202211_30385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
OBJECTIVE The notochord acts as a patterning structure, playing a key role in the formation of the vertebral column, both indirectly by inducing sclerotome cell differentiation and directly by forming the nucleus pulposus of intervertebral discs. The abnormal development of the notochord results in an easy equation with a variety of birth defects. Therefore, we focused our attention on the analysis of the early stages of human notochord development by highlighting the role of progenitor stem cells involved in the origin of intervertebral discs (IVDs). MATERIALS AND METHODS Eight human fetuses, ranging from 8 up to 21 weeks of gestational age, were obtained from spontaneous abortion or voluntary interruption of gestation. Samples were 10% formalin-fixed, routinely processed, and paraffin-embedded. Five micron-tick paraffin sections were obtained from each sample. Sections were stained with hematoxylin-eosin and PAS stain for a morphological examination. Tissue samples were immunostained with a commercial anti-human CD44 rabbit monoclonal antibody at 1:100 dilution. RESULTS Immunoreactivity for CD44 was detected in six out of eight notochords examined in this study. Reactivity for CD44 was restricted to progenitor cells giving rise to the nucleus pulposus (NP) of the developing IVDs. Positive cells showed a membranous and/or cytoplasmic immunostaining, no reactivity was observed in the nuclear compartment. CD44 expression was always restricted to IVD precursor cells, whereas cartilage precursors were devoid of labelling. CONCLUSIONS Our study shows, for the first time, that the stem cell marker CD44 selectively marks intervertebral disc progenitor cells, paralleling their differentiation toward a discogenic phenotype. Therefore, our results suggest that CD44 plays a key role in IVD development, allowing its differentiation from surrounding undifferentiated notochordal cells toward a IVD phenotype. Given the role of CD44 in IVD development, we may hypothesize that low CD44 levels might be associated with changes in IVD development and with susceptibility to develop back pain later in life.
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Affiliation(s)
- M Piras
- Department of Medical Sciences and Public Health, University of Cagliari, Electron Microscopy Laboratory, Division Pathological Anatomy, Cagliari, Italy.
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Piras M, Gerosa C, Congiu T, Cau F, Fanni D, Pichiri G, Coni P, Lachowicz JI, Schirru E, Congia M, Rossino R, Muntoni S, Jaremko M, Piludu M. Toward the renal vesicle: Ultrastructural investigation of the cap mesenchyme splitting process in the developing kidney. J Public Health Res 2022; 11:22799036221124076. [PMID: 36310827 PMCID: PMC9597041 DOI: 10.1177/22799036221124076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 08/02/2022] [Indexed: 11/09/2022] Open
Abstract
Background A complex sequence of morphogenetic events leads to the development of the adult mouse kidney. In the present study, we investigated the morphological events that characterize the early stages of the mesenchymal-to-epithelial transition of cap mesenchymal cells, analyzing in depth the relationship between cap mesenchymal induction and ureteric bud (UB) branching. Design and methods Normal kidneys of newborn non-obese diabetic (NOD) mice were excised and prepared for light and electron microscopic examination. Results Nephrogenesis was evident in the outer portion of the renal cortex of all examined samples. This process was mainly due to the interaction of two primordial derivatives, the ureteric bud and the metanephric mesenchyme. Early renal developmental stages were initially characterized by the formation of a continuous layer of condensed mesenchymal cells around the tips of the ureteric buds. These caps of mesenchymal cells affected the epithelial cells of the underlying ureteric bud, possibly inducing their growth and branching. Conclusions The present study provides morphological evidence of the reciprocal induction between the ureteric bud and the metanephric mesenchyme showing that the ureteric buds convert mesenchyme to epithelium that in turn stimulates the growth and the branching of the ureteric bud.
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Affiliation(s)
- Monica Piras
- Department of Medical Sciences and
Public Health, AOU, University of Cagliari, Cagliari, Sardegna, Italy
| | - Clara Gerosa
- Department of Medical Sciences and
Public Health, AOU, University of Cagliari, Cagliari, Sardegna, Italy
| | - Terenzio Congiu
- Department of Medical Sciences and
Public Health, AOU, University of Cagliari, Cagliari, Sardegna, Italy,Terenzio Congiu, Department of Medical
Sciences and Public Health, AOU, University of Cagliari, Via Ospedale Cagliari,
Cagliari, Sardegna 09124, Italy.
| | - Flaviana Cau
- Department of Medical Sciences and
Public Health, AOU, University of Cagliari, Cagliari, Sardegna, Italy
| | - Daniela Fanni
- Department of Medical Sciences and
Public Health, AOU, University of Cagliari, Cagliari, Sardegna, Italy
| | - Giuseppina Pichiri
- Department of Medical Sciences and
Public Health, AOU, University of Cagliari, Cagliari, Sardegna, Italy
| | - Pierpaolo Coni
- Department of Medical Sciences and
Public Health, AOU, University of Cagliari, Cagliari, Sardegna, Italy
| | - Joanna Izabela Lachowicz
- Department of Medical Sciences and
Public Health, AOU, University of Cagliari, Cagliari, Sardegna, Italy
| | - Enrico Schirru
- CeSaSASt. Centro Servizi di Ateneo per
gli Stabulari, University of Cagliari, Cagliari, Sardegna, Italy
| | - Mauro Congia
- Unit of Pediatric Gastroenterology,
Microcitemico Hospital, Cagliari, Cagliari, Sardegna, Italy
| | - Rossano Rossino
- Department of Medical Sciences and
Public Health, AOU, University of Cagliari, Cagliari, Sardegna, Italy
| | - Sandro Muntoni
- Department of Biomedical Sciences,
University of Cagliari, Cagliari, Sardegna, Italy
| | - Mariusz Jaremko
- Biological and Environmental Sciences
& Engineering Division (BESE), King Abdullah University of Science and
Technology (KAUST), Thuwal, Saudi Arabia
| | - Marco Piludu
- Department of Biomedical Sciences,
University of Cagliari, Cagliari, Sardegna, Italy,Consorzio Interuniversitario per lo
Sviluppo dei Sistemi a Grande Interfase (CSGI), Sesto Fiorentino, Italy
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6
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Cau F, Fanni D, Manchia M, Gerosa C, Piras M, Murru R, Paribello P, Congiu T, Coni P, Pichiri G, Piludu M, Van Eyken P, Gibo Y, La Nasa G, Orrù G, Scano A, Coghe F, Saba L, Castagnola M, Faa G. Expression of L1 Cell Adhesion Molecule (L1CAM) in extracellular vesicles in the human spinal cord during development. Eur Rev Med Pharmacol Sci 2022; 26:6273-6282. [PMID: 36111928 DOI: 10.26355/eurrev_202209_29651] [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: 06/15/2023]
Abstract
OBJECTIVE L1 cell adhesion molecule (L1CAM) is a glycoprotein characterized by three components: an extracellular region, a transmembrane segment, and a cytoplasmic tail. L1CAM is expressed in multiple human cells, including neurons. The neural cell adhesion molecule L1 has been implicated in a variety of neurologic processes, including neuritogenesis and cerebellar cell migration. The presence of L1CAM on the surface of nerve cells allows the adhesion of neurons among them. Furthermore, when it is bound to itself or to other proteins, L1-CAM induces signals inside the cell. The aim of this work was to study L1CAM expression in the human spinal cord during development, at different gestational ages, through immunohistochemistry. MATERIALS AND METHODS Immunohistochemical analysis for L1CAM was performed in five human spinal cord samples, including three embryos and two fetuses of different gestational ages, ranging from 8 to 12 weeks. RESULTS L1CAM expression was detected in all 5 spinal cords examined in this study. The adhesion molecule was found in the vast majority of cells. The highest levels of immunoreactivity for L1CAM were detected at the periphery of the developing organs, in the spinal cord zones occupied by sensory and motor fibers. In the alar and basal columns, immunoreactivity for L1CAM was characterized by a reticular pattern, being mainly expressed in axons. Strong reactivity of L1CAM was also found in extracellular vesicles. This extracellular localization might indicate the ability of L1CAM to mediate the transduction of extracellular signals that support axon outgrowth. CONCLUSIONS The high reactivity of L1cam in the axons of developing neurons in the fetal spinal cord confirms previous studies on the ability of L1CAM to promote axon sprouting and branching in the developing nervous system. In this work, a new actor is reported to have a role in the complex field of human spinal cord development: L1CAM, whose expression is highly found in the developing neuronal and glial precursors.
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Affiliation(s)
- F Cau
- Department of Medical Sciences and Public Health, Division of Pathology, AOU of Cagliari, University of Cagliari, Cagliari, Italy.
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Marino F, Pinoli M, Rasini E, Martini S, Luini A, Pulze L, Dalla Gasperina D, Grossi P, Legnaro M, Ferrari M, Congiu T, Pacheco R, Osorio-Barrios F, de Eguileor M, Cosentino M. Dopaminergic Inhibition of Human Neutrophils is Exerted Through D1-Like Receptors and Affected By Bacterial Infection. Immunol Suppl 2022; 167:508-527. [PMID: 35897164 DOI: 10.1111/imm.13550] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 07/11/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND Dopamine (DA) affects immune functions in healthy subjects and during disease by acting on D1-like (D1 and D5) and D2-like (D2, D3 and D4) dopaminergic receptors (DR), however its effects on human polymorphonuclear leukocytes (PMN) are still poorly defined. METHODS We investigated DR expression in human PMN and the ability of DA to affect cell migration and reactive oxygen species (ROS) production. Experiments were performed on cells from healthy subjects (HS) and from patients (Pts) with bacterial infections as well, during the acute phase and after recovery. Some experiments were also performed in mice KO for the DRD5 gene. RESULTS PMN from HS express both D1-like and D2-like DR, and exposure to DA results in inhibition of activation-induced morphological changes, migration and ROS production which depend on the activation of D1-like DR. In agreement with these findings, DA inhibited migration of PMN obtained from wild-type mice, but not from DR D5 KO mice. In Pts with bacterial infections, during the febrile phase D1-like DR D5 on PMN were downregulated and DA failed to affect PMN migration. Both D1-like DR D5 expression and DA-induced inhibition of PMN migration were however restored after recovery. CONCLUSION Dopaminergic inhibition of human PMN is a novel mechanism which is likely to play a key role in the regulation of innate immunity. Evidence obtained in Pts with bacterial infections provides novel clues for the therapeutic modulation of PMN during infectious disease.
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Affiliation(s)
- Franca Marino
- Center for Research in Medical Pharmacology; University of Insubria, Varese, Italy
| | - Monica Pinoli
- Center for Research in Medical Pharmacology; University of Insubria, Varese, Italy
| | - Emanuela Rasini
- Center for Research in Medical Pharmacology University of Insubria, Varese, Italy
| | - Stefano Martini
- Center for Research in Medical Pharmacology; University of Insubria, Varese, Italy
| | - Alessandra Luini
- Center for Research in Medical Pharmacology; University of Insubria, Varese, Italy
| | - Laura Pulze
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
| | | | - Paolo Grossi
- Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - Massimiliano Legnaro
- Center for Research in Medical Pharmacology; University of Insubria, Varese, Italy
| | - Marco Ferrari
- Center for Research in Medical Pharmacology; University of Insubria, Varese, Italy
| | - Terenzio Congiu
- Department of Surgical Sciences, University of Cagliari, Italy
| | - Rodrigo Pacheco
- Laboratorio de Neuroinmunología, Fundación Ciencia & Vida, Ñuñoa, Santiago, Chile.,Facultad de Medicina y Ciencia, Universidad San Sebastián, Providencia, Santiago, Chile
| | | | - Magda de Eguileor
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
| | - Marco Cosentino
- Center for Research in Medical Pharmacology; University of Insubria, Varese, Italy
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Manis C, Manca A, Murgia A, Uras G, Caboni P, Congiu T, Faa G, Pantaleo A, Cao G. Understanding the Behaviour of Human Cell Types under Simulated Microgravity Conditions: The Case of Erythrocytes. Int J Mol Sci 2022; 23:ijms23126876. [PMID: 35743319 PMCID: PMC9224527 DOI: 10.3390/ijms23126876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/09/2022] [Accepted: 06/15/2022] [Indexed: 12/10/2022] Open
Abstract
Erythrocytes are highly specialized cells in human body, and their main function is to ensure the gas exchanges, O2 and CO2, within the body. The exposure to microgravity environment leads to several health risks such as those affecting red blood cells. In this work, we investigated the changes that occur in the structure and function of red blood cells under simulated microgravity, compared to terrestrial conditions, at different time points using biochemical and biophysical techniques. Erythrocytes exposed to simulated microgravity showed morphological changes, a constant increase in reactive oxygen species (ROS), a significant reduction in total antioxidant capacity (TAC), a remarkable and constant decrease in total glutathione (GSH) concentration, and an augmentation in malondialdehyde (MDA) at increasing times. Moreover, experiments were performed to evaluate the lipid profile of erythrocyte membranes which showed an upregulation in the following membrane phosphocholines (PC): PC16:0_16:0, PC 33:5, PC18:2_18:2, PC 15:1_20:4 and SM d42:1. Thus, remarkable changes in erythrocyte cytoskeletal architecture and membrane stiffness due to oxidative damage have been found under microgravity conditions, in addition to factors that contribute to the plasticity of the red blood cells (RBCs) including shape, size, cell viscosity and membrane rigidity. This study represents our first investigation into the effects of microgravity on erythrocytes and will be followed by other experiments towards understanding the behaviour of different human cell types in microgravity.
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Affiliation(s)
- Cristina Manis
- Department of Life and Environmental Sciences, Cittadella Universitaria di Monserrato, 09042 Monserrato, Italy; (C.M.); (A.M.); (P.C.)
- Department of Mechanical, Chemical and Materials Engineering, University of Cagliari, Piazza d’Armi, 09123 Cagliari, Italy
| | - Alessia Manca
- Department of Biomedical Science, University of Sassari, Viale San Pietro, 07100 Sassari, Italy;
| | - Antonio Murgia
- Department of Life and Environmental Sciences, Cittadella Universitaria di Monserrato, 09042 Monserrato, Italy; (C.M.); (A.M.); (P.C.)
| | - Giuseppe Uras
- Department of Clinical and Movement Neurosciences, Institute of Neurology, University of College London, London NW3 2PF, UK;
| | - Pierluigi Caboni
- Department of Life and Environmental Sciences, Cittadella Universitaria di Monserrato, 09042 Monserrato, Italy; (C.M.); (A.M.); (P.C.)
| | - Terenzio Congiu
- Department of Medical Sciences and Public Health, University of Cagliari, Monserrato’s Campus, 09042 Monserrato, Italy; (T.C.); (G.F.)
| | - Gavino Faa
- Department of Medical Sciences and Public Health, University of Cagliari, Monserrato’s Campus, 09042 Monserrato, Italy; (T.C.); (G.F.)
| | - Antonella Pantaleo
- Department of Biomedical Science, University of Sassari, Viale San Pietro, 07100 Sassari, Italy;
- Correspondence: (A.P.); (G.C.)
| | - Giacomo Cao
- Department of Mechanical, Chemical and Materials Engineering, University of Cagliari, Piazza d’Armi, 09123 Cagliari, Italy
- Center of Advanced Studies, Research and Development in Sardinia (CRS4), Loc. Piscina Manna, Building 1, 09050 Pula, Italy
- Sardinia AeroSpace District (DASS), at Sardegna Ricerche, Via G. Carbonazzi 14, 09123 Cagliari, Italy
- Correspondence: (A.P.); (G.C.)
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Coghe F, Fanni D, Gerosa C, Ravarino A, Mureddu M, Cerrone G, Coni P, Pichiri G, Congiu T, Piras M, Cau F, Aimola V, Balestrieri A, Lai E, Manchia M, Scano A, Orrù G, La Nasa G, Van Eyken P, Saba L, Scartozzi M, Castagnola M, Faa G. The role of fetal programming in human carcinogenesis - May the Barker hypothesis explain interindividual variability in susceptibility to cancer insurgence and progression? Eur Rev Med Pharmacol Sci 2022; 26:3585-3592. [PMID: 35647840 DOI: 10.26355/eurrev_202205_28854] [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: 06/15/2023]
Abstract
The growing incidence of cancers is pushing oncologists to find out new explanations other than the somatic mutation theory, based on the accumulation of DNA mutations. In particular, the embryo-fetal exposure to an increasing number of environmental factors during gestation might represent a trigger able to influence the susceptibility of the newborn to develop cancer later in life. This idea agrees with the fetal programming theory, also known as the Barker hypothesis. Here the role of insulin-like growth factors, thymosin beta-4, and epigenome are discussed as mediators of cancer in prenatal human development. The role of epigenetic factors that during gestation increase the predisposition to develop cancer and the similarities in the gene expression (like MMP9, OPN, TP53 and CDKN2A) between embryonic development and cancer are key factors. Likewise, maternal obesity might be able to re-program embryo-fetal development with long-term changes, including an increased risk to develop neuroblastoma and acute leukemia. Birth weight alone and birth weight corrected for gestational age are proposed as important variables capable of predicting the vulnerability to develop cancers. According to the findings here reported, we hypothesize that cancer prevention should start during gestation by improving the quality of maternal diet. In conclusion, the Barker hypothesis should be applied to cancer as well. Therefore, the identification of the epigenetic factors of cancer appears mandatory, so that the cancer prevention might start in the womb before birth.
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Affiliation(s)
- F Coghe
- Department of Clinical Laboratory, Azienda Ospedaliero Universitaria (AOU) di Cagliari - Polo di Monserrato, Cagliari, Italy.
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Congiu T, Demontis R, Cau F, Piras M, Fanni D, Gerosa C, Botta C, Scano A, Chighine A, Faedda E, Cau R, Van Eyken P, Marongiu F, Barcellona D, Saba L, Orrù G, Coghe F, Suri JS, Faa G, d'Aloja E. Scanning electron microscopy of lung disease due to COVID-19 - a case report and a review of the literature. Eur Rev Med Pharmacol Sci 2022; 25:7997-8003. [PMID: 34982463 DOI: 10.26355/eurrev_202112_27650] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The ongoing Coronavirus pandemic (COVID-19) showed similar characteristics with the severe acute respiratory syndrome (SARS). In the most compromised cases, COVID-19 infection leads to death due to severe respiratory complications. COVID-19-related acute respiratory distress syndrome (ARDS) is the primary cause of death in these patients. In the present study, we show an ultrastructural analysis on the lungs of a patient affected by COVID-19. PATIENTS AND METHODS Lung specimens obtained at autopsy from a 63-years old patient affected by COVID-19 were fixed in 1% paraformaldehyde. Slices of 300 µm thickness were dehydrated and dried by Critical Point Drying in CO2. Slices were covered with a conductive gold film approximately 30 nm thick and observed at a Zeiss Sigma 300 SEM FEG in the secondary electron (SE) and backscattered electron (BSE) modes. As case control a lung biopsy from a 60-year-old man was considered. RESULTS At low power in all COVID-19 lung specimens severe changes in the pulmonary architecture were found, due to the collapse of air spaces. Moreover, alveolar cavities were covered by large membranes. At high power, alveolar membranes showed a fibrillar structure, suggestive of a loose network of fibrin. It has been also found that intra-alveolar red blood cells were frequently present in the alveolar spaces, surrounded by a reticular fibrin network, suggestive for fibrin-hemorrhagic alveolitis. Alveolar changes were constantly associated with pathological features related to the pulmonary vessels. Vascular changes were prominent, including endothelial damage and thrombosis of large pulmonary vessels. Fibrinous microthrombi were frequently detected in the inter-alveolar septal capillaries. In addition, it has been frequently detected capillary proliferation in the alveolar septa with finding suggestive for intussusceptive neo-angiogenesis. CONCLUSIONS In conclusion, our electron microscopy analysis showed that COVID-19-related lung disease is characterized by a substantial architectural distortion, with the interactions between alveolar and vascular changes. Intra-alveolar hyaline membranes are associated with macro- and micro-thrombotic angiopathy, ending with capillary proliferation. The new blood vessel formation originates from the septa and extends into the surrounding parenchyma. Our findings confirm previous reports on the specificity of the multiple and complex morphological pattern typical, and apparently specific, of COVID-19-related lung disease.
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Affiliation(s)
- T Congiu
- Department of Medical Sciences and Public Health, Electron Microscopy Laboratory, Division Pathological Anatomy, University of Cagliari, Cagliari, Italy.
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11
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Lachowicz JI, Pichiri G, Piludu M, Fais S, Orrù G, Congiu T, Piras M, Faa G, Fanni D, Dalla Torre G, Lopez X, Chandra K, Szczepski K, Jaremko L, Ghosh M, Emwas AH, Castagnola M, Jaremko M, Hannappel E, Coni P. Thymosin β4 Is an Endogenous Iron Chelator and Molecular Switcher of Ferroptosis. Int J Mol Sci 2022; 23:551. [PMID: 35008976 PMCID: PMC8745404 DOI: 10.3390/ijms23010551] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/01/2022] [Accepted: 01/03/2022] [Indexed: 02/01/2023] Open
Abstract
Thymosin β4 (Tβ4) was extracted forty years agofrom calf thymus. Since then, it has been identified as a G-actin binding protein involved in blood clotting, tissue regeneration, angiogenesis, and anti-inflammatory processes. Tβ4 has also been implicated in tumor metastasis and neurodegeneration. However, the precise roles and mechanism(s) of action of Tβ4 in these processes remain largely unknown, with the binding of the G-actin protein being insufficient to explain these multi-actions. Here we identify for the first time the important role of Tβ4 mechanism in ferroptosis, an iron-dependent form of cell death, which leads to neurodegeneration and somehow protects cancer cells against cell death. Specifically, we demonstrate four iron2+ and iron3+ binding regions along the peptide and show that the presence of Tβ4 in cell growing medium inhibits erastin and glutamate-induced ferroptosis in the macrophage cell line. Moreover, Tβ4 increases the expression of oxidative stress-related genes, namely BAX, hem oxygenase-1, heat shock protein 70 and thioredoxin reductase 1, which are downregulated during ferroptosis. We state the hypothesis that Tβ4 is an endogenous iron chelator and take part in iron homeostasis in the ferroptosis process. We discuss the literature data of parallel involvement of Tβ4 and ferroptosis in different human pathologies, mainly cancer and neurodegeneration. Our findings confronted with literature data show that controlled Tβ4 release could command on/off switching of ferroptosis and may provide novel therapeutic opportunities in cancer and tissue degeneration pathologies.
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Affiliation(s)
- Joanna I. Lachowicz
- Department of Medical Sciences and Public Health, University of Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy; (J.I.L.); (T.C.); (M.P.); (G.F.); (D.F.); (P.C.)
| | - Giusi Pichiri
- Department of Medical Sciences and Public Health, University of Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy; (J.I.L.); (T.C.); (M.P.); (G.F.); (D.F.); (P.C.)
| | - Marco Piludu
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy
| | - Sara Fais
- Department of Surgical Science, OBL Oral Biotechnology Laboratory, University of Cagliari, 09124 Cagliari, Italy; (S.F.); (G.O.)
| | - Germano Orrù
- Department of Surgical Science, OBL Oral Biotechnology Laboratory, University of Cagliari, 09124 Cagliari, Italy; (S.F.); (G.O.)
| | - Terenzio Congiu
- Department of Medical Sciences and Public Health, University of Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy; (J.I.L.); (T.C.); (M.P.); (G.F.); (D.F.); (P.C.)
| | - Monica Piras
- Department of Medical Sciences and Public Health, University of Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy; (J.I.L.); (T.C.); (M.P.); (G.F.); (D.F.); (P.C.)
| | - Gavino Faa
- Department of Medical Sciences and Public Health, University of Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy; (J.I.L.); (T.C.); (M.P.); (G.F.); (D.F.); (P.C.)
| | - Daniela Fanni
- Department of Medical Sciences and Public Health, University of Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy; (J.I.L.); (T.C.); (M.P.); (G.F.); (D.F.); (P.C.)
| | - Gabriele Dalla Torre
- Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Donostia International Physics Center (DIPC), P.K. 1072 Donostia Euskadi, 20080 San Sebastian, Spain; (G.D.T.); (X.L.)
| | - Xabier Lopez
- Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Donostia International Physics Center (DIPC), P.K. 1072 Donostia Euskadi, 20080 San Sebastian, Spain; (G.D.T.); (X.L.)
| | - Kousik Chandra
- Smart-Health Initiative (SHI) and Red Sea Research Center (RSRC), Division of Biological and Environmental Sciences and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia; (K.C.); (K.S.); (L.J.); (M.G.)
| | - Kacper Szczepski
- Smart-Health Initiative (SHI) and Red Sea Research Center (RSRC), Division of Biological and Environmental Sciences and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia; (K.C.); (K.S.); (L.J.); (M.G.)
| | - Lukasz Jaremko
- Smart-Health Initiative (SHI) and Red Sea Research Center (RSRC), Division of Biological and Environmental Sciences and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia; (K.C.); (K.S.); (L.J.); (M.G.)
| | - Mitra Ghosh
- Smart-Health Initiative (SHI) and Red Sea Research Center (RSRC), Division of Biological and Environmental Sciences and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia; (K.C.); (K.S.); (L.J.); (M.G.)
| | - Abdul-Hamid Emwas
- Core Labs, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia;
| | - Massimo Castagnola
- Institute of Chemistry of Molecular Recognition, National Research Council (Consiglio Nazionale delle Ricerche), 00185 Rome, Italy;
- Laboratory of Proteomics and Metabolomics, IRCCS, Santa Lucia Foundation, 00143 Rome, Italy
| | - Mariusz Jaremko
- Smart-Health Initiative (SHI) and Red Sea Research Center (RSRC), Division of Biological and Environmental Sciences and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia; (K.C.); (K.S.); (L.J.); (M.G.)
| | - Ewald Hannappel
- Institute of Biochemistry, Friedrich-Alexander-University Erlangen-Nuremberg, 91058 Erlangen, Germany;
| | - Pierpaolo Coni
- Department of Medical Sciences and Public Health, University of Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy; (J.I.L.); (T.C.); (M.P.); (G.F.); (D.F.); (P.C.)
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12
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Congiu T, Fanni D, Piras M, Gerosa C, Cau F, Barcellona D, D'Aloja E, Demontis R, Chighine A, Nioi M, Coni P, Ravarino A, Cerrone G, Aimola V, Botta C, Scano A, Orrù G, Coghe F, Van Eyken P, La Nasa G, Saba L, Suri JS, Faa G, Marongiu F. Ultrastructural findings of lung injury due to Vaccine-induced Immune Thrombotic Thrombo- cytopenia (VITT) following COVID-19 vaccination: a scanning electron microscopic study. Eur Rev Med Pharmacol Sci 2022; 26:270-277. [PMID: 35049004 DOI: 10.26355/eurrev_202201_27777] [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: 06/14/2023]
Abstract
Vaccine-induced immune thrombotic thrombocytopenia (VITT) is a rare new syndrome occurring after the ChAdOx1 nCoV-19 vaccine immunization. Patients with VITT are characterized by a variable clinical presentation, likewise also the outcome of these patients is very variable. Here we report the lung ultrastructural findings in the course of VITT of a 58-year-old male patient. Alveoli were mainly dilated, irregular in shape, and occupied by a reticular network of fibrin, while interalveolar septa appeared thickened. The proliferation of small capillaries gave rise to plexiform structures and pulmonary capillary hemangiomatosis-like features. Near the alveoli occupied by a dense fibrin network, the medium-sized arteries showed a modified wall and an intraluminal thrombus. This scenario looks quite similar to that found during COVID-19, where the lungs suffer from the attack of the antigen-antibodies complexes and the virus respectively. In both diseases, the final outcome is a severe inflammation, activation of the haemostatic system and fibrinolysis.
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Affiliation(s)
- T Congiu
- Division of Pathology, Department of Medical Sciences and Public Health, AOU of Cagliari, University of Cagliari, Cagliari, Italy.
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13
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Gerosa C, Faa G, Fanni D, Cerrone G, Suri JS, Barcellona D, Coni P, Congiu T, Lai ML, Piras M, Cau F, Coghe F, Balestrieri A, Cau R, Orru' G, Scano A, Van Eyken P, La Nasa G, Campagna M, Castagnola M, Gibo Y, Marongiu F, Saba L. Fetal programming of atherosclerosis: may the barker hypothesis explain the susceptibility of a subset of patients to develop stroke or cardiac infarct? Eur Rev Med Pharmacol Sci 2021; 25:6633-6641. [PMID: 34787867 DOI: 10.26355/eurrev_202111_27107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The risk stratification of young adults between subjects who will develop a mild form of atherosclerosis and subjects who will undergo a severe disease remains inaccurate. In the eighties of the previous century, David JP Barker has demonstrated the relationship between fetal conditions and occurrence of pathologies in adulthood. In this paper, the multiple evidence that might explain the increased susceptibility to severe forms of atherosclerosis, including stroke and cardiac infarct, in subjects who underwent intrauterine growth restriction (IUGR) will be analyzed. Specifically, we will review those inter-connected data indicating an association between a low weight at birth and an adult phenotype which might favor a severe outcome of atherosclerosis. Young and adult subjects born too small (IUGR) or too early (pre-terms) might represent a subgroup of "at risk subjects", more susceptible toward severe forms of atherosclerosis. Given that low birth weight (LBW) may be considered a surrogate of IUGR, this phenotypic feature could be considered among those indispensable clinical data collected in every patient presenting with atherosclerosis, irrespectively of age. According to the hypothesis that structural arterial changes might represent the link between LBW and susceptibility to atherosclerosis later in life, we suggest that the prevention of atherosclerosis should begin at birth. Regenerative and physiological substances such as thymosin Beta-4 could be challenged for a new "arterial regenerative medicine" in the perinatal period. The goal of this new approach should be the reinforcement of the structure of the arterial wall, allowing LBW newborns to avoid the most severe complications of atherosclerosis later in life: a dream that our research could contribute to bringing to life.
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Affiliation(s)
- C Gerosa
- Division of Pathology, Department of Medical Sciences and Public Health, AOU of Cagliari, University of Cagliari, Cagliari, Italy.
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14
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Saba L, Nardi V, Cau R, Gupta A, Kamel H, Suri JS, Balestrieri A, Congiu T, Butler APH, Gieseg S, Fanni D, Cerrone G, Sanfilippo R, Puig J, Yang Q, Mannelli L, Faa G, Lanzino G. Carotid Artery Plaque Calcifications: Lessons From Histopathology to Diagnostic Imaging. Stroke 2021; 53:290-297. [PMID: 34753301 DOI: 10.1161/strokeaha.121.035692] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The role of calcium in atherosclerosis is controversial and the relationship between vascular calcification and plaque vulnerability is not fully understood. Although calcifications are present in ≈50% to 60% of carotid plaques, their association with cerebrovascular ischemic events remains unclear. In this review, we summarize current understanding of carotid plaque calcification. We outline the role of calcium in atherosclerotic carotid disease by analyzing laboratory studies and histopathologic studies, as well as imaging findings to understand clinical implications of carotid artery calcifications. Differences in mechanism of calcium deposition express themselves into a wide range of calcification phenotypes in carotid plaques. Some patterns, such as rim calcification, are suggestive of plaques with inflammatory activity with leakage of the vasa vasourm and intraplaque hemorrhage. Other patterns such as dense, nodular calcifications may confer greater mechanical stability to the plaque and reduce the risk of embolization for a given degree of plaque size and luminal stenosis. Various distributions and patterns of carotid plaque calcification, often influenced by the underlying systemic pathological condition, have a different role in affecting plaque stability. Modern imaging techniques afford multiple approaches to assess geometry, pattern of distribution, size, and composition of carotid artery calcifications. Future investigations with these novel technologies will further improve our understanding of carotid artery calcification and will play an important role in understanding and minimizing stroke risk in patients with carotid plaques.
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Affiliation(s)
- Luca Saba
- Department of Radiology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari - Polo di Monserrato s.s, Cagliari, Italy (L.S., R.C., A.B.)
| | - Valentina Nardi
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN. (V.N.)
| | - Riccardo Cau
- Department of Radiology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari - Polo di Monserrato s.s, Cagliari, Italy (L.S., R.C., A.B.)
| | - Ajay Gupta
- Department of Radiology, Weill Cornell Medicine, New York, New York. (A.G.)
| | - Hooman Kamel
- Department of Neurology, Weill Cornell Medicine, New York, New York. (H.K.)
| | - Jasjit S Suri
- Stroke Diagnosis and Monitoring Division, AtheroPoint LLC, Roseville, CA (J.S.S.)
| | - Antonella Balestrieri
- Department of Radiology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari - Polo di Monserrato s.s, Cagliari, Italy (L.S., R.C., A.B.)
| | - Terenzio Congiu
- Department of Pathology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari -Polo di Monserrato s.s, Cagliari, Italy (T.C., D.F., G.C., G.F.)
| | - Anthony P H Butler
- Department of Radiology, University of Otago, Christchurch, New Zealand (A.P.H.B., S.G.)
| | - Steven Gieseg
- Department of Radiology, University of Otago, Christchurch, New Zealand (A.P.H.B., S.G.)
| | - Daniela Fanni
- Department of Pathology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari -Polo di Monserrato s.s, Cagliari, Italy (T.C., D.F., G.C., G.F.)
| | - Giulia Cerrone
- Department of Pathology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari -Polo di Monserrato s.s, Cagliari, Italy (T.C., D.F., G.C., G.F.)
| | - Roberto Sanfilippo
- Department of Vascular Surgery, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari - Polo di Monserrato s.s, Cagliari, Italy (R.S.)
| | - Josep Puig
- Department of Radiology (IDI), Hospital Universitari de Girona, Spain (J.P.)
| | - Qi Yang
- Xuanwu Hospital, Capital Medical University, Xicheng District, Beijing, China (Q.Y.)
| | | | - Gavino Faa
- Department of Pathology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari -Polo di Monserrato s.s, Cagliari, Italy (T.C., D.F., G.C., G.F.)
| | - Giuseppe Lanzino
- Department of Neurologic Surgery, Mayo Clinic, Rochester, MN. (G.L.)
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15
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Fanni D, Cerrone G, Saba L, Demontis R, Congiu T, Piras M, Gerosa C, Suri J, Coni P, Caddori A, Piga M, Mancosu G, Barcellona D, Ravarino A, Chighine A, Cau F, Scano A, Balestrieri A, Coghe F, Orrù G, Van Eyken P, La Nasa G, D'Aloia E, Marongiu F, Faa G. Thrombotic sinusoiditis and local diffuse intrasinusoidal coagulation in the liver of subjects affected by COVID-19: the evidence from histology and scanning electron microscopy. Eur Rev Med Pharmacol Sci 2021; 25:5904-5912. [PMID: 34661248 DOI: 10.26355/eurrev_202110_26866] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Liver injury has been reported in patients with COVID-19. This condition is characterized by severe outcome and could be related with the ability of SARS-CoV-2 to activate cytotoxic T cells. The purpose of this study is to show the histological and scanning electron microscopy features of liver involvement in COVID-19 to characterize the liver changes caused by the activation of multiple molecular pathways following this infection. PATIENTS AND METHODS Liver biopsies from 4 patients (3 post-mortems and 1 in vivo) with COVID-19 were analyzed with histology and by scanning electron microscopy. RESULTS The liver changes showed significant heterogeneity. The first case showed ground glass hepatocytes and scattered fibrin aggregates in the sinusoidal lumen. The second evidenced intra-sinusoidal thrombi. The third was characterized by sinusoidal dilatation, atrophy of hepatocytes, Disse's spaces dilatation and intra-sinusoidal aggregates of fibrin and red blood cells. The fourth case exhibited diffuse fibrin aggregates in the dilated Disse spaces and microthrombi in the sinusoidal lumen. CONCLUSIONS In COVID-19-related liver injury, a large spectrum of pathological changes was observed. The most peculiar features were very mild inflammation, intra-sinusoidal changes, including sinusoidal dilatation, thrombotic sinusoiditis and diffuse intra-sinusoidal fibrin deposition. These findings suggested that a thrombotic sinusoiditis followed by a local diffuse intra-vascular (intra-sinusoidal) coagulation could be the typical features of the SARS-CoV-2-related liver injury.
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Affiliation(s)
- D Fanni
- Division of Pathology, Department of Medical Sciences and Public Health, AOU of Cagliari, University of Cagliari, Cagliari, Italy.
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Gerosa C, Faa G, Fanni D, Manchia M, Suri JS, Ravarino A, Barcellona D, Pichiri G, Coni P, Congiu T, Piras M, Cerrone G, Cau F, Ledda F, Aimola V, Coghe F, Porcu M, Cau R, Orru' G, Van Eyken P, La Nasa G, Castagnola M, Marongiu F, Saba L. Fetal programming of COVID-19: may the barker hypothesis explain the susceptibility of a subset of young adults to develop severe disease? Eur Rev Med Pharmacol Sci 2021; 25:5876-5884. [PMID: 34604981 DOI: 10.26355/eurrev_202109_26810] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The risk stratification of young adults between subjects who will develop a mild form COVID-19 and subjects who will undergo a severe disease remains inaccurate. In this review, we propose that the Barker hypothesis might explain the increased susceptibility to severe forms of COVID-19 in subjects who underwent intrauterine growth restriction (IUGR). In this paper evidence indicating an association between a low birth weight and an adult phenotype which might favor a severe outcome of SARS-CoV-2 infection are presented: lower lung functional capacity; increased respiratory morbidity; changes in fibrinogen and Factor VII serum levels and dysregulation of the hemostasis and thrombosis system; acquisition of a pro-thrombotic phenotype; low nephron number, with decreased ability to sustain renal function and increased renal morbidity; heart remodeling, with a less efficient cardiac function; endothelial dysfunction, a risk factor for the insurgence of the multiple organ failure; remodeling of arteries, with changes in the elastic properties of the arterial wall, predisposing to the insurgence and progression of atherosclerosis; dysfunction of the innate immune system, a risk factor for immune diseases in adulthood. These data suggest that young and adult subjects born too small (IUGR) or too early (pre-terms) might represent a subgroup of "at risk subjects", more susceptible toward severe forms of COVID-19. Given that LBW may be considered a surrogate of IUGR, this phenotypic marker should be included among the indispensable clinical data collected in every patient presenting with SARS-COV-2 infection, irrespectively of his/her age.
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Affiliation(s)
- C Gerosa
- Division of Pathology, Department of Medical Science and Public Health, University of Cagliari, Cagliari, Italy.
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Gerosa C, Fanni D, Cau F, Ravarino A, Senes G, Demontis R, Coni P, Piras M, Orrù G, Coghe F, Congiu T, La Nasa G, D'Aloja E, Saba L, Faa G. Immunohistochemical findings in the lungs of COVID-19 subjects: evidence of surfactant dysregulation. Eur Rev Med Pharmacol Sci 2021; 25:4639-4643. [PMID: 34286505 DOI: 10.26355/eurrev_202107_26257] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Acute respiratory distress syndrome (ARDS) is characterized by quantitative and qualitative changes in surfactant composition, leading to surfactant dysregulation with alveolar collapse and acute respiratory hypoxic failure. Recently, surfactant has been hypothesized to play a relevant role in COVID-19, representing a strong defender against SARS-CoV-2 infection. The aim of our work was the study of immunohistochemical surfactant expression in the lungs of patients died following SARS-CoV-2 ARDS, in order to shed light on a possible therapeutic surfactant administration. PATIENTS AND METHODS We investigated four patients who died due to ARDS following SARS-COV-2 infection and four patients submitted to lung biopsy, in the absence of SARS-CoV-2 infection. In all 8 cases, lung specimens were immunostained with anti-surfactant protein A (SP-A) and B (SP-B). RESULTS In control subjects, reactivity for SP-B was restricted to type II alveolar cells. Immunostaining for SP-A was observed on the surface of alveolar spaces. In the COVID-19 positive lungs, immunoreactivity for SP-B was similar to that observed in control lungs; SP-A was strongly expressed along the alveolar wall. Moreover, dense aggregates of SP-A positive material were observed in the alveolar spaces. CONCLUSIONS Our immunohistochemical data show the dysregulation of surfactant production in COVID-19 patients, particularly regarding SP-A expression. The increased presence of SP-A in condensed masses inside alveolar spaces could invalidate the therapeutic efficacy of the treatment with exogenous surfactant.
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Affiliation(s)
- C Gerosa
- Division of Pathology, Department of Medical Science and Public Health, University of Cagliari, Cagliari, Italy.
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Fanni D, Gerosa C, Nurchi VM, Suri JS, Nardi V, Congiu T, Coni P, Ravarino A, Cerrone G, Piras M, Cau F, Kounis NG, Balestrieri A, Gibo Y, Van Eyken P, Coghe F, Venanzi Rullo E, Taibi R, Orrù G, Faa G, Saba L. Trace elements and the carotid plaque: the GOOD (Mg, Zn, Se), the UGLY (Fe, Cu), and the BAD (P, Ca)? Eur Rev Med Pharmacol Sci 2021; 25:3772-3790. [PMID: 34109586 DOI: 10.26355/eurrev_202105_25945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Multiple epidemiological studies have suggested that industrialization and progressive urbanization should be considered one of the main factors responsible for the rising of atherosclerosis in the developing world. In this scenario, the role of trace metals in the insurgence and progression of atherosclerosis has not been clarified yet. In this paper, the specific role of selected trace elements (magnesium, zinc, selenium, iron, copper, phosphorus, and calcium) is described by focusing on the atherosclerotic prevention and pathogenesis plaque. For each element, the following data are reported: daily intake, serum levels, intra/extracellular distribution, major roles in physiology, main effects of high and low levels, specific roles in atherosclerosis, possible interactions with other trace elements, and possible influences on plaque development. For each trace element, the correlations between its levels and clinical severity and outcome of COVID-19 are discussed. Moreover, the role of matrix metalloproteinases, a family of zinc-dependent endopeptidases, as a new medical therapeutical approach to atherosclerosis is discussed. Data suggest that trace element status may influence both atherosclerosis insurgence and plaque evolution toward a stable or an unstable status. However, significant variability in the action of these traces is evident: some - including magnesium, zinc, and selenium - may have a protective role, whereas others, including iron and copper, probably have a multi-faceted and more complex role in the pathogenesis of the atherosclerotic plaque. Finally, calcium and phosphorus are implicated in the calcification of atherosclerotic plaques and in the progression of the plaque toward rupture and severe clinical complications. In particular, the role of calcium is debated. Focusing on the COVID-19 pandemia, optimized magnesium and zinc levels are indicated as important protective tools against a severe clinical course of the disease, often related to the ability of SARS-CoV-2 to cause a systemic inflammatory response, able to transform a stable plaque into an unstable one, with severe clinical complications.
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Affiliation(s)
- D Fanni
- Department of Medical Sciences and Public Health, Division of Pathology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari - University Hospital San Giovanni di Dio, University of Cagliari, Cagliari, Italy.
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19
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Marongiu F, Ntoukas DM, Barberini L, Ruberto MF, Piras MS, Conti M, Di Martino ML, Mura M, Marongiu S, Vannini ML, Lillu M, Piras M, Fanni D, Fenu L, Porcu C, Barcellona D, Faa G, Congiu T. Clot characterization by multidisciplinary approach: biochemical and imaging parameters in a hypocoagulative setting. A pilot study. J Public Health Res 2021; 10. [PMID: 34036778 PMCID: PMC9136229 DOI: 10.4081/jphr.2021.2358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 05/17/2021] [Indexed: 11/29/2022] Open
Abstract
Background Clot characterization is, to the present days, a multimodal approach:
scanning the clot by electron microscopy (SEM) is helpful for the
visualization of fibrin structure along with laboratory parameters such as
the clot waveform analysis (CWA) and thrombin generation in different
settings of clot abnormalities. This study aimed to assess whether the
coagulative parameters were consistent with the clot images texture acquired
by SEM, and therefore to propose a more generalist and integrative approach
to clots classification. Design and methods In this pilot study, the examined population consists of eight healthy
subjects, seven patients affected by Acquired Hemophilia A (AHA) and seven
patients treated with Vitamin K Antagonists (VKAs), similar for age and
gender. We studied the velocity and acceleration (1st and
2nd derivative of the aPTT) of clot formation (CWA), the
thrombin generation, and the clots’ scanning by SEM. Images acquired with
SEM were then analyzed with the MATLAB software with the “Texture Analysis”
methods to perform classification. Among the various texture parameters, we
reported Contrast and Energy. Results Significant differences among healthy subjects, patients with AHA and those
treated with VKAs were detected for the coagulative parameters. We found no
differences between VKAs and AHA patients. Contrast and energy highlighted a
significant difference among the three groups in agreement with the
laboratory's parameters. We found no significant differences between VKAs
and AHA patients. Conclusions The use of SEM, CWA and thrombin generation parameters may be a starting
point for studies aimed to demonstrate the general characteristics of clot
formation in different clinical conditions with a multiparametric
approach.
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Affiliation(s)
- Francesco Marongiu
- Hemostasis and Thrombosis Unit, Department of Medical Sciences and Public Health, University of Cagliari.
| | - Dimitrios Marco Ntoukas
- Hemostasis and Thrombosis Unit, Department of Medical Sciences and Public Health, University of Cagliari.
| | - Luigi Barberini
- Department of Medical Sciences and Public Health, University of Cagliari.
| | - Maria Filomena Ruberto
- Hemostasis and Thrombosis Unit, Department of Medical Sciences and Public Health, University of Cagliari.
| | - Maria Sebastiana Piras
- Hemostasis and Thrombosis Unit, Department of Medical Sciences and Public Health, University of Cagliari.
| | - Maria Conti
- Liver Unit, Department of Internal Medicine, University Hospital of Cagliari.
| | - Maria Luisa Di Martino
- Internal Medicine Unit, Department of Medical Sciences and Public Health, University of Cagliari.
| | - Mario Mura
- Internal Medicine Unit, Department of Medical Sciences and Public Health, University of Cagliari.
| | - Silvia Marongiu
- Internal Medicine Unit, SS Trinità Hospital, Azienda Tutela della Salute, Cagliari.
| | - Maria Luigia Vannini
- Hemostasis and Thrombosis Unit, Department of Medical Sciences and Public Health, University of Cagliari.
| | - Mattia Lillu
- Internal Medicine Unit, Department of Medical Sciences and Public Health, University of Cagliari.
| | - Monica Piras
- Anatomic-Pathology Unit, Department of Medical Sciences and Public Health, University of Cagliari.
| | - Daniela Fanni
- Anatomic-Pathology Unit, Department of Medical Sciences and Public Health, University of Cagliari.
| | - Lara Fenu
- Hemostasis and Thrombosis Unit, Department of Medical Sciences and Public Health, University of Cagliari.
| | | | - Doris Barcellona
- Hemostasis and Thrombosis Unit, Department of Medical Sciences and Public Health, University of Cagliari.
| | - Gavino Faa
- SHRO Temple University, Philadelphia, PA.
| | - Terenzio Congiu
- Anatomic-Pathology Unit, Department of Medical Sciences and Public Health, University of Cagliari.
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Barcellona D, Fanni D, Gerosa C, Congiu T, Orrù G, Faa G, Marongiu F. Heparins and 2019-nCoV infection: a narrative review. Eur Rev Med Pharmacol Sci 2021; 25:3594-3606. [PMID: 34002834 DOI: 10.26355/eurrev_202105_25842] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Patients with 2019-nCoV infection have a high risk to develop venous thrombotic events. Several guidelines recommend the use of either unfractionated heparin or low molecular weight heparins in preventing thrombotic events in these patients. However, results from clinical studies, so far published, reached controversial conclusions on heparin efficacy in this kind of patients since the incidence of venous thromboembolism remains high despite prophylaxis. This narrative review aims to provide an overview of the antiviral and anti-inflammatory properties of heparins and their efficacy and safety in SARS-CoV-2 medical ward-patients. Moreover, anatomical findings and ongoing trials are also reported. Finally, this narrative review tries to explain why heparins fail to prevent venous thrombosis. MATERIALS AND METHODS We searched for the most relevant published studies on heparins and 2019-nCoV infected patients using the MEDLINE electronic database in the period between January and December 2020. Articles were preliminarily defined as eligible if they: a) were in English language, b) enrolled 250 or more medical ward-patients and 100 or more ICU-patients, c) reported results on patients treated with heparins in a percentage of at least 70% and d) performed an objectively confirmed diagnosis of VTE. RESULTS Data from medium to large scientific studies show that the incidence of venous thrombotic events in medical ward-patients with SARS-CoV-2 vary between 0% and 8.3%, while this rate is higher, from 6.2% to 49%, in Intensive Care Unit-patients. However, heparins reduce the mortality rate in these patients of about 50%. Histological findings show that thrombosis could affect capillaries, main and small-mid-sized vessels, and it is associated with diffuse alveolar damage. CONCLUSIONS Heparins have anti-inflammatory and anti-viral properties, which may be of help in reducing mortality in SARS-CoV-2 patients. Failure of heparins at prophylactic dosages in preventing VTE, especially in ICU-patients, could be due to the severity of the disease. Data on the use of heparins in an early phase of the 2019-nCoV infection are still lacking.
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Affiliation(s)
- D Barcellona
- Department of Medical Science and Public Health, University of Cagliari, Cagliari, Italy.
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21
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Grossi S, Grimaldi A, Congiu T, Parnigoni A, Campanelli G, Campomenosi P. Human Primary Dermal Fibroblasts Interacting with 3-Dimensional Matrices for Surgical Application Show Specific Growth and Gene Expression Programs. Int J Mol Sci 2021; 22:ijms22020526. [PMID: 33430241 PMCID: PMC7825678 DOI: 10.3390/ijms22020526] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 12/28/2020] [Accepted: 01/05/2021] [Indexed: 01/06/2023] Open
Abstract
Several types of 3-dimensional (3D) biological matrices are employed for clinical and surgical applications, but few indications are available to guide surgeons in the choice among these materials. Here we compare the in vitro growth of human primary fibroblasts on different biological matrices commonly used for clinical and surgical applications and the activation of specific molecular pathways over 30 days of growth. Morphological analyses by Scanning Electron Microscopy and proliferation curves showed that fibroblasts have different ability to attach and proliferate on the different biological matrices. They activated similar gene expression programs, reducing the expression of collagen genes and myofibroblast differentiation markers compared to fibroblasts grown in 2D. However, differences among 3D matrices were observed in the expression of specific metalloproteinases and interleukin-6. Indeed, cell proliferation and expression of matrix degrading enzymes occur in the initial steps of interaction between fibroblast and the investigated meshes, whereas collagen and interleukin-6 expression appear to start later. The data reported here highlight features of fibroblasts grown on different 3D biological matrices and warrant further studies to understand how these findings may be used to help the clinicians choose the correct material for specific applications.
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Affiliation(s)
- Sarah Grossi
- Department of Biotechnology and Life Sciences, University of Insubria, DBSV, Via J.H. Dunant 3, 21100 Varese, Italy; (S.G.); (A.G.); (A.P.)
| | - Annalisa Grimaldi
- Department of Biotechnology and Life Sciences, University of Insubria, DBSV, Via J.H. Dunant 3, 21100 Varese, Italy; (S.G.); (A.G.); (A.P.)
| | - Terenzio Congiu
- Department of Surgical Sciences, University of Cagliari, 09100 Cagliari, Italy;
| | - Arianna Parnigoni
- Department of Biotechnology and Life Sciences, University of Insubria, DBSV, Via J.H. Dunant 3, 21100 Varese, Italy; (S.G.); (A.G.); (A.P.)
| | - Giampiero Campanelli
- Milano Hernia Center, Department of Surgical Science, Istituto Clinico Sant’Ambrogio, Via Luigi Giuseppe Faravelli 16, 20149 Milan, Italy;
- Department of Medicine and Surgery, University of Insubria, DMC, Via Guicciardini 9, 21100 Varese, Italy
| | - Paola Campomenosi
- Department of Biotechnology and Life Sciences, University of Insubria, DBSV, Via J.H. Dunant 3, 21100 Varese, Italy; (S.G.); (A.G.); (A.P.)
- Correspondence: ; Tel.: +39-0332-421322
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22
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Congiu T, Lubrano F, Talu V, Tola G. GAP REDUCE. A research and development project to promote quality of urban life of adult people with autism spectrum disorder. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa165.1395] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Sensory peculiarities of people with Autism Spectrum Disorder (ASD) significantly affect their lives, making the relationship with the environment difficult to face. Many authors, referring to the urban environment, report that rather more stimuli required to be processed and orientation and navigation are challenging skills at different scales. The growing incidence and prevalence of the disorder and the need to guarantee during adulthood the actual opportunity to exercise the level of autonomy achieved during youth, emphasize the necessity to 'broaden' the research perspective by investigating also how the shape and the organization of the urban environment affect the quality of life of this group of inhabitants. GAP REDUCE is a R&D project aiming at developing a tool to provide support to adult and high-functioning people with ASD to plan, easily and in advance, an urban itinerary towards daily destinations. After the development of a cognitive framework on the relationship between built environment and autism, a survey involving different experts has been conducted to identify the relevant urban spatial features to calculate the most suitable path (in terms of sensory stimuli, accessibility and orientation). A neighbourhood in Sassari (Italy) was selected as pilot study area to test the tool.
Results
The identified urban features were classified into positive and negative points of interest, acting as spatial facilitators or obstacles respectively, and evaluated on the basis on a set of indicators according to their impact on the possibility for the user to reach the selected destination.
Conclusions
GAP REDUCE is an innovative tool that leverages on spatial facilitator to make the urban environment more accessible, inclusive and healthy to people with ASD. Indeed, this principle and tool can be also applied to other groups of inhabitants (elderly, people with dementia, people with other sensory disabilities).
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Affiliation(s)
- T Congiu
- Department of Architecture, Design and Planning, University of Sassari, Alghero, Italy
| | | | - V Talu
- Department of Architecture, Design and Planning, University of Sassari, Alghero, Italy
| | - G Tola
- Department of Architecture, Design and Planning, University of Sassari, Alghero, Italy
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Gerosa C, Fanni D, Congiu T, Piras M, Cau F, Moi M, Faa G. Liver pathology in Wilson's disease: From copper overload to cirrhosis. J Inorg Biochem 2019; 193:106-111. [PMID: 30703747 DOI: 10.1016/j.jinorgbio.2019.01.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [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: 10/16/2018] [Revised: 01/11/2019] [Accepted: 01/12/2019] [Indexed: 02/07/2023]
Abstract
Wilson's disease (WD) is a genetic metabolic disease strictly associated with liver cirrhosis. In this review, the genetic bases of the disease are discussed, with emphasis on the role of ATP7B (the Wilson disease protein) dysfunction as a determinant factor of systemic copper overload. Regarding the different multiple mutations described in WD patients, the peculiarity of Sardinian population is highlighted, Sardinians carrying a rare deletion in the promoter (5' UTR) of the WD gene. The role of epigenetic changes in the clinical presentation and evolution of liver disease in WD patients is also discussed, nutrition probably representing a relevantly risk factor in WD patients. The role of transmission electron microscopy in the diagnosis of WD-related liver disease is underlined. Mitochondrial changes, increased peroxisomes fat droplets, lipolysosomes and intranuclear glycogen inclusions are reported as the most frequent ultrastructural changes in the liver of WD carriers. The role of histochemical stains for copper is analyzed, and the Timm's method is suggested as the most sensitive one for revealing hepatic copper overload in all stage of WD. The marked variability of the histological liver changes occurring in WD is underlined simple steatosis may represent the only pathological changes, frequently associated with glycogenated nuclei. Mallory-Denk bodies lipogranulomas alcoholic and non-alcoholic fatty liver disease ending with bridging fibrosis and cirrhosis. Finally, the reversal of fibrosis as a possible therapeutic objective in WD is discussed.
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Affiliation(s)
- C Gerosa
- Division of Pathological, University of Cagliari AOU Cagliari, Cagliari, Italy
| | - D Fanni
- Division of Pathological, University of Cagliari AOU Cagliari, Cagliari, Italy
| | - T Congiu
- Division of Pathological, University of Cagliari AOU Cagliari, Cagliari, Italy
| | - M Piras
- Division of Pathological, University of Cagliari AOU Cagliari, Cagliari, Italy.
| | - F Cau
- Division of Pathological, San Gavino Hospital, ATS, San Gavino, Italy
| | - M Moi
- Division of Pathological, University of Cagliari AOU Cagliari, Cagliari, Italy
| | - G Faa
- Division of Pathological, University of Cagliari AOU Cagliari, Cagliari, Italy
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24
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Iannaccone M, Basso PR, Congiu T, Cavicchio P, Ulivi V, Campolo M. Multiple Organ Dysfunction Syndrome (MODS) induced by Candida krusei in an Aldabra giant tortoise (Aldabrachelys gigantea) and confirmed by electron microscopy analysis. Med Mycol Case Rep 2018; 21:44-48. [PMID: 30023165 PMCID: PMC6045929 DOI: 10.1016/j.mmcr.2018.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/23/2018] [Accepted: 04/16/2018] [Indexed: 12/01/2022] Open
Abstract
A young female Aldabra giant tortoise (Adabrachelys gigantea) was presented with anorexia, ataxia, severe constipation and bloating. Analysis revealed liver disease and collected biopsy diagnosed Candida krusei infection. Despite Itraconazole treatment, the tortoise got worse and died. Full necropsy was performed; microbiology showed Candida krusei presence in liver, but histopathology didn’t confirm fungal presence with special stains, so scanning electron microscopy was essential to prove a detailed diagnosis of extensive mycosis.
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Affiliation(s)
- Maddalena Iannaccone
- Centro Veterinario il Mondo degli Animali Esotici, Via S. Martino 67/r, 16131 Genova, Italy
- Corresponding author.
| | - Petra Rita Basso
- Department of Surgical and Morphological Sciences, University of Insubria, 21100 Varese, Italy
| | - Terenzio Congiu
- Department of Surgical and Morphological Sciences, University of Insubria, 21100 Varese, Italy
| | - Paolo Cavicchio
- Giardino Zoologico Città di Pistoia, Via Pieve a Celle 160, 51100 Pistoia, Italy
| | - Valentina Ulivi
- Centro Veterinario il Mondo degli Animali Esotici, Via S. Martino 67/r, 16131 Genova, Italy
| | - Marco Campolo
- Centro Veterinario Einaudi, Via N. Colajanni 23 A, 70125 Bari, Italy
- Zoo delle Maitine, Via Fontana dell’Occhio, 82020 Pesco Sannita, Benevento, Italy
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Cappai A, Petruzzo P, Ruiu G, Congiu T, Dessy E, De Seta W, Santa Cruz G, Brotzu G. Evaluation of new small barium alginate microcapsules. Int J Artif Organs 2018. [DOI: 10.1177/039139889501800209] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- A. Cappai
- Surgical Sciences Department, Cagliari University, Cagliari - Italy
| | - P. Petruzzo
- Surgical Sciences Department, Cagliari University, Cagliari - Italy
| | - G. Ruiu
- Surgical Sciences Department, Cagliari University, Cagliari - Italy
| | - T. Congiu
- Cytomorphology Department, Cagliari University, Cagliari - Italy
| | - E. Dessy
- Institute of Pathological Anatomy, Cagliari University, Cagliari - Italy
| | - W. De Seta
- Institute of Pathological Anatomy, Cagliari University, Cagliari - Italy
| | - G. Santa Cruz
- Institute of Pathological Anatomy, Cagliari University, Cagliari - Italy
| | - G. Brotzu
- Surgical Sciences Department, Cagliari University, Cagliari - Italy
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Pazzaglia UE, Reguzzoni M, Pagani F, Sibilia V, Congiu T, Salvi AG, Benetti A. Study of Endochondral Ossification in Human Fetalcartilage Anlagen of Metacarpals: Comparative Morphology of Mineral Deposition in Cartilage and in the Periosteal Bone Matrix. Anat Rec (Hoboken) 2018; 301:571-580. [PMID: 29266881 DOI: 10.1002/ar.23756] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 03/13/2017] [Revised: 09/22/2017] [Accepted: 10/10/2017] [Indexed: 11/10/2022]
Abstract
The progression of mineral phase deposition in hypertrophic cartilage and periosteal bone matrix was studied in human metacarpals primary ossification centers before vascular invasion began. This study aimed to provide a morphologic/morphometric comparative analysis of the calcification process in cartilage and periosteal osteoid used as models of endochondral ossification. Thin, sequential sections from the same paraffin inclusions of metacarpal anlagen (gestational age between the 20th and 22nd weeks) were examined with light microscopy and scanning electron microscopy, either stained or heat-deproteinated. This process enabled the analysis of corresponding fields using the different methods. From the initial CaPO4 nucleation in cartilage matrix, calcification progressed increasing the size of focal, globular, randomly distributed deposits (size range 0.5-5 µm), followed by aggregation into polycyclic clusters and finally forming a dense, compact mass of calcified cartilage. At the same time, the early osteoid calcification was characterized by a fine granular pattern (size range 0.1-0.5 µm), which was soon compacted in the layer of the first periosteal lamella. Scanning electron microscopy of heat-deproteinated sections revealed a rod-like hydroxyapatite crystallite pattern, with only size differences between the early globular deposits of the two calcifying matrices. The morphology of the early calcium deposits was similar in both cartilage and osteoid, with variations in size and density only. However, integration of the reported data with the actual hypotheses of the mechanisms of Ca concentration suggested that ion transport was linked to the progression of the chondrocyte maturation cycle (with recall of H2 O from the matrix) in cartilage, while ions transport was an active process through the cell membrane in osteoid. Other considered factors were the collagen type specificity and the matrix fibrillar texture. Anat Rec, 301:571-580, 2018. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Ugo E Pazzaglia
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy
| | - Marcella Reguzzoni
- Department of Surgical and Morphological Sciences, University of Insubria, Varese, Italy
| | - Francesca Pagani
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Valeria Sibilia
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Terenzio Congiu
- Department of Surgical and Morphological Sciences, University of Insubria, Varese, Italy
| | - Andrea G Salvi
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy
| | - Anna Benetti
- Department of Clinical and Experimental Sciences, University of Brescia, Italy
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Diana A, Reguzzoni M, Congiu T, Rescigno A, Sollai F, Raspanti M. The byssus threads of Pinna nobilis: A histochemical and ultrastructural study. Eur J Histochem 2017; 61:2779. [PMID: 29313595 PMCID: PMC5695422 DOI: 10.4081/ejh.2017.2779] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 02/21/2017] [Revised: 10/17/2017] [Accepted: 10/19/2017] [Indexed: 01/23/2023] Open
Abstract
The byssus of Pinna nobilis, the largest bivalve mollusc in the Mediterranean Sea, was investigated by histochemistry, immunohistochemistry, Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). At low magnification, the byssus threads appeared distinctively elliptical in cross-section, with a typical size approaching 50 x 25 micron and a featureless glassy appearance. Histochemical and immunohistochemical techniques confirmed the presence of elastic domains but the absence of collagen, which is known to be the main component in other molluscs. Ultrastructural analysis by TEM revealed the presence of at least two components within the thread, and an inner arrangement of straight, tightly packed longitudinal streaks. SEM observations while confirming the inner packing of straight, parallel subfibrils, suggested in the fracture surfaces the presence of unidentified substance which cemented together the same subfibrils and which was removed by exposure to extreme pH values. AFM micrographs added further evidence for the tight packing of subfibrils and provided some evidence of orthogonal, barely visible connecting structures. Finally, HCl or NaOH treatment left the subfibrils clean and free from any other component.Â.
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Affiliation(s)
- Andrea Diana
- University of Cagliari, Department of Biomedical Sciences.
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Pazzaglia UE, Congiu T, Sibilia V, Casati L, Minini A, Benetti A. Growth and shaping of metacarpal and carpal cartilage anlagen: application of morphometry to the development of short and long bone. A study of human hand anlagen in the fetal period. J Morphol 2017; 278:884-895. [DOI: 10.1002/jmor.20681] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 03/08/2017] [Accepted: 03/19/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Ugo E. Pazzaglia
- Department of Medical and Surgical Specialties; Radiological Sciences and Public Health, University of Brescia; Italy
| | - Terenzio Congiu
- Department of Surgical and Morphological Sciences; University of Insubria; Varese Italy
| | - Valeria Sibilia
- Department of Medical Biotechnology and Translational Medicine; University of Milan; Italy
| | - Lavinia Casati
- Department of Medical Biotechnology and Translational Medicine; University of Milan; Italy
| | - Andrea Minini
- Department of Medical and Surgical Specialties; Radiological Sciences and Public Health, University of Brescia; Italy
| | - Anna Benetti
- Department of Clinical and Experimental Sciences; University of Brescia; Italy
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Marino F, Schembri L, Rasini E, Pinoli M, Scanzano A, Luini A, Congiu T, Cosentino M. Characterization of human leukocyte-HUVEC adhesion: Effect of cell preparation methods. J Immunol Methods 2017; 443:55-63. [DOI: 10.1016/j.jim.2017.01.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 12/22/2016] [Accepted: 01/03/2017] [Indexed: 12/18/2022]
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Dalmastri C, Gastaldo L, Marcone GL, Binda E, Congiu T, Marinelli F. Classification of Nonomuraea sp. ATCC 39727, an actinomycete that produces the glycopeptide antibiotic A40926, as Nonomuraea gerenzanensis sp. nov. Int J Syst Evol Microbiol 2017; 66:912-921. [PMID: 26944798 DOI: 10.1099/ijsem.0.000810] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Strain ATCC 39727, which produces the antibiotic A40926 (the natural precursor of the antibiotic dalbavancin), was isolated from a soil sample collected in India, and it was originally classified as a member of the genus Actinomadura on the base of morphology and cell-wall composition. A phylogenetic analysis based on 16S rRNA gene sequences indicates that the strain forms a distinct clade within the genus Nonomuraea, and it is most closely related to Nonomuraea angiospora DSM 43173T (98.72 % similarity) and Nonomuraea jabiensis A4036T (98.69 %). The strain forms an extensively branched substrate mycelium and aerial hyphae that form spiral chains of spores with ridged surfaces. The cell wall contains meso-diaminopimelic acid and the whole-cell sugars are glucose, ribose, galactose, mannose and madurose (madurose as the diagnostic sugar). The N-acyl type of muramic acid is acetyl. The predominant menaquinone is MK-9(H4), with minor amounts of MK-9(H2), MK-9(H6) and MK-9(H0). The polar-lipid profile includes diphosphatidylglycerol, phosphatidylethanolamine, hydroxyphosphatidylethanolamine, phosphatidylmethylethanolamine, hydroxyphosphatidylmethylethanolamine, phosphatidylinositol and a series of uncharacterized phospholipids, glycolipids and phosphoglycolipids. The major cellular fatty acids are iso-C16 : 0 and 10-methyl C17 : 0. The genomic DNA G+C content is 71.2 mol%. Significant differences in the morphological, chemotaxonomic and biochemical data, together with DNA-DNA relatedness between strain ATCC 39727 and closely related type strains, clearly demonstrated that strain ATCC 39727 represents a novel species of the genus Nonomuraea, for which the name Nonomuraea gerenzanensis sp. nov. is proposed. The type strain is ATCC 39727T ( = DSM 100948T).
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Affiliation(s)
- Claudia Dalmastri
- ENEA (Italian National Agency for New Technologies, Energy and Sustainable Economic Development), Department for Sustainability of Production and Territorial Systems, via Anguillarese 301, 00123, Rome, Italy
| | - Luciano Gastaldo
- Department of Biotechnology and Life Sciences, University of Insubria, and 'The Protein Factory' Research Center, Politecnico of Milano, ICRM CNR Milano and University of Insubria, 21100, Varese, Italy
| | - Giorgia Letizia Marcone
- Department of Biotechnology and Life Sciences, University of Insubria, and 'The Protein Factory' Research Center, Politecnico of Milano, ICRM CNR Milano and University of Insubria, 21100, Varese, Italy
| | - Elisa Binda
- Department of Biotechnology and Life Sciences, University of Insubria, and 'The Protein Factory' Research Center, Politecnico of Milano, ICRM CNR Milano and University of Insubria, 21100, Varese, Italy
| | - Terenzio Congiu
- Department of Surgical and Morphological Sciences, University of Insubria, 21100, Varese, Italy
| | - Flavia Marinelli
- Department of Biotechnology and Life Sciences, University of Insubria, and 'The Protein Factory' Research Center, Politecnico of Milano, ICRM CNR Milano and University of Insubria, 21100, Varese, Italy
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Principi E, Girardello R, Bruno A, Manni I, Gini E, Pagani A, Grimaldi A, Ivaldi F, Congiu T, De Stefano D, Piaggio G, de Eguileor M, Noonan DM, Albini A. Systemic distribution of single-walled carbon nanotubes in a novel model: alteration of biochemical parameters, metabolic functions, liver accumulation, and inflammation in vivo. Int J Nanomedicine 2016; 11:4299-316. [PMID: 27621623 PMCID: PMC5012628 DOI: 10.2147/ijn.s109950] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [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] [Indexed: 11/23/2022] Open
Abstract
The increasing use of carbon nanotubes (CNTs) in several industrial applications raises concerns on their potential toxicity due to factors such as tissue penetrance, small dimensions, and biopersistence. Using an in vivo model for CNT environmental exposure, mimicking CNT exposition at the workplace, we previously found that CNTs rapidly enter and disseminate in the organism, initially accumulating in the lungs and brain and later reaching the liver and kidneys via the bloodstream in CD1 mice. Here, we monitored and traced the accumulation of single-walled CNTs (SWCNTs), administered systemically in mice, in different organs and the subsequent biological responses. Using the novel in vivo model, MITO-Luc bioluminescence reporter mice, we found that SWCNTs induce systemic cell proliferation, indicating a dynamic response of cells of both bone marrow and the immune system. We then examined metabolic (water/food consumption and dejections), functional (serum enzymes), and morphological (organs and tissues) alterations in CD1 mice treated with SWCNTs, using metabolic cages, performing serum analyses, and applying histological, immunohistochemical, and ultrastructural (transmission electron microscopy) methods. We observed a transient accumulation of SWCNTs in the lungs, spleen, and kidneys of CD1 mice exposed to SWCNTs. A dose- and time-dependent accumulation was found in the liver, associated with increases in levels of aspartate aminotransferase, alanine aminotransferase and bilirubinemia, which are metabolic markers associated with liver damage. Our data suggest that hepatic accumulation of SWCNTs associated with liver damage results in an M1 macrophage-driven inflammation.
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Affiliation(s)
- Elisa Principi
- Vascular Biology and Angiogenesis, Scientific and Technology Pole, IRCCS MultiMedica, Milano
| | - Rossana Girardello
- Department of Biotechnology and Life Sciences, University of Insubria, Varese
| | - Antonino Bruno
- Vascular Biology and Angiogenesis, Scientific and Technology Pole, IRCCS MultiMedica, Milano
| | - Isabella Manni
- Department of Research, Advanced Diagnosis and Innovation, Regina Elena National Cancer Institute, Rome
| | - Elisabetta Gini
- Department of Biotechnology and Life Sciences, University of Insubria, Varese
| | - Arianna Pagani
- Vascular Biology and Angiogenesis, Scientific and Technology Pole, IRCCS MultiMedica, Milano
| | - Annalisa Grimaldi
- Department of Biotechnology and Life Sciences, University of Insubria, Varese
| | - Federico Ivaldi
- Department of Neuroscience, Ophthalmology and Genetics, University of Genoa, Genoa
| | - Terenzio Congiu
- Department of Surgical and Morphological Sciences, University of Insubria, Varese, Italy
| | - Daniela De Stefano
- Vascular Biology and Angiogenesis, Scientific and Technology Pole, IRCCS MultiMedica, Milano
| | - Giulia Piaggio
- Department of Research, Advanced Diagnosis and Innovation, Regina Elena National Cancer Institute, Rome
| | - Magda de Eguileor
- Department of Biotechnology and Life Sciences, University of Insubria, Varese
| | - Douglas M Noonan
- Vascular Biology and Angiogenesis, Scientific and Technology Pole, IRCCS MultiMedica, Milano; Department of Biotechnology and Life Sciences, University of Insubria, Varese
| | - Adriana Albini
- Vascular Biology and Angiogenesis, Scientific and Technology Pole, IRCCS MultiMedica, Milano
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Pazzaglia UE, Congiu T, Sibilia V, Pagani F, Benetti A, Zarattini G. Relationship between the chondrocyte maturation cycle and the endochondral ossification in the diaphyseal and epiphyseal ossification centers. J Morphol 2016; 277:1187-98. [DOI: 10.1002/jmor.20568] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 05/16/2016] [Accepted: 05/26/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Ugo E. Pazzaglia
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health; University of Brescia; Brescia Italy
| | - Terenzio Congiu
- Department of Surgical and Morphological Sciences; University of Insubria; Varese Italy
| | - Valeria Sibilia
- Department of Medical Biotechnology and Translational Medicine; University of Milan; Milan Italy
| | - Francesca Pagani
- Department of Medical Biotechnology and Translational Medicine; University of Milan; Milan Italy
| | - Anna Benetti
- Department of Clinical and Experimental Sciences; University of Brescia; Brescia Italy
| | - Guido Zarattini
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health; University of Brescia; Brescia Italy
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Pazzaglia UE, Congiu T, Basso P, Alessandri I, Cucca L, Raspanti M. The application of heat-deproteinization to the morphological study of cortical bone: A contribution to the knowledge of the osteonal structure. Microsc Res Tech 2016; 79:691-9. [DOI: 10.1002/jemt.22686] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 04/28/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Ugo E. Pazzaglia
- Department of Medical and Surgical Specialities; Radiological Sciences and Public Health, University of Brescia; Brescia Italy
| | - Terenzio Congiu
- Department of Surgical and Morphological Sciences; University of Insubria; Varese Italy
| | - Petra Basso
- Department of Surgical and Morphological Sciences; University of Insubria; Varese Italy
| | - Ivano Alessandri
- Department of Mechanical and Industrial Engineering; Chemistry for Technologies Lab, University of Brescia; Brescia Italy
| | - Lucia Cucca
- Department of Chemistry; University of Pavia; Pavia Italy
| | - Mario Raspanti
- Department of Surgical and Morphological Sciences; University of Insubria; Varese Italy
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Berini F, Caccia S, Franzetti E, Congiu T, Marinelli F, Casartelli M, Tettamanti G. Effects of Trichoderma viride chitinases on the peritrophic matrix of Lepidoptera. Pest Manag Sci 2016; 72:980-989. [PMID: 26179981 DOI: 10.1002/ps.4078] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 06/26/2015] [Accepted: 07/07/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND The peritrophic matrix (PM) is formed by a network of chitin fibrils associated with proteins, glycoproteins and proteoglycans that lines the insect midgut. It is a physical barrier involved in digestion processes, and protects the midgut epithelium from food abrasion, pathogen infections and toxic materials. Given its fundamental role in insect physiology, the PM represents an excellent target for pest control strategies. Although a number of viral, bacterial and insect chitinolytic enzymes affecting PM integrity have already been tested, exploitation of fungal chitinases has been almost neglected. Fungal chitinases, already in use as fungal phytopathogen biocontrol agents, are known to attack the insect cuticle, but their action on the insect gut needs to be better investigated. RESULTS In the present paper, we performed a biochemical characterisation of a commercial mixture of chitinolytic enzymes derived from Trichoderma viride and analysed its in vitro and in vivo effects on the PM of the silkworm Bombyx mori, a model system among Lepidoptera. We found that these enzymes have significant in vitro effects on the structure and permeability of the PM of this insect. A bioassay supported these results and showed that the oral administration of the mixture causes PM alterations, leading to adverse consequences on larval growth and development, negatively affecting pupal weight and even inducing mortality. CONCLUSIONS This study provides an integrated experimental approach to evaluate the effects of fungal chitinases on Lepidoptera. The encouraging results obtained herein make us confident about the possible use of fungal chitinases to control lepidopteran pests.
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Affiliation(s)
- Francesca Berini
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
- The Protein Factory Research Centre, Politecnico di Milano, ICRM CNR Milano and University of Insubria, Varese, Italy
| | - Silvia Caccia
- Department of Biosciences, University of Milano, Milano, Italy
- Department of Agriculture, University of Napoli Federico II, Portici, Napoli, Italy
| | - Eleonora Franzetti
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
| | - Terenzio Congiu
- Department of Surgical and Morphological Sciences, University of Insubria, Varese, Italy
| | - Flavia Marinelli
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
- The Protein Factory Research Centre, Politecnico di Milano, ICRM CNR Milano and University of Insubria, Varese, Italy
| | | | - Gianluca Tettamanti
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
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Albini A, Pagani A, Pulze L, Bruno A, Principi E, Congiu T, Gini E, Grimaldi A, Bassani B, De Flora S, de Eguileor M, Noonan DM. Environmental impact of multi-wall carbon nanotubes in a novel model of exposure: systemic distribution, macrophage accumulation, and amyloid deposition. Int J Nanomedicine 2015; 10:6133-45. [PMID: 26457053 PMCID: PMC4598201 DOI: 10.2147/ijn.s85275] [Citation(s) in RCA: 17] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Carbon nanotubes (CNTs) have been extensively investigated and employed for industrial use because of their peculiar physical properties, which make them ideal for many industrial applications. However, rapid growth of CNT employment raises concerns about the potential risks and toxicities for public health, environment, and workers associated with the manufacture and use of these new materials. Here we investigate the main routes of entry following environmental exposure to multi-wall CNTs (MWCNTs; currently the most widely used in industry). We developed a novel murine model that could represent a surrogate of a workplace exposure to MWCNTs. We traced the localization of MWCNTs and their possible role in inducing an innate immune response, inflammation, macrophage recruitment, and inflammatory conditions. Following environmental exposure of CD1 mice, we observed that MWCNTs rapidly enter and disseminate in the organism, initially accumulating in lungs and brain and later reaching the liver and kidney via the bloodstream. Since recent experimental studies show that CNTs are associated with the aggregation process of proteins associated with neurodegenerative diseases, we investigated whether MWCNTs are able to induce amyloid fibril production and accumulation. Amyloid deposits in spatial association with macrophages and MWCNT aggregates were found in the brain, liver, lungs, and kidneys of exposed animals. Our data suggest that accumulation of MWCNTs in different organs is associated with inflammation and amyloid accumulation. In the brain, where we observed rapid accumulation and amyloid fibril deposition, exposure to MWCNTs might enhance progression of neurodegenerative and other amyloid-related diseases. Our data highlight the conclusion that, in a novel rodent model of exposure, MWCNTs may induce macrophage recruitment, activation, and amyloid deposition, causing potential damage to several organs.
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Affiliation(s)
- Adriana Albini
- Laboratory of Translational Research, IRCCS Arcispedale Santa Maria Nuova, Reggio Emilia, Italy
| | - Arianna Pagani
- Department of Biotechnologies and Life Sciences, University of Insubria, Varese, Italy
- Scientific and Technology Park, IRCCS MultiMedica, Milano, Italy
| | - Laura Pulze
- Department of Biotechnologies and Life Sciences, University of Insubria, Varese, Italy
| | - Antonino Bruno
- Scientific and Technology Park, IRCCS MultiMedica, Milano, Italy
| | - Elisa Principi
- Scientific and Technology Park, IRCCS MultiMedica, Milano, Italy
| | - Terenzio Congiu
- Department of Surgical and Morphological Sciences, University of Insubria, Varese, Italy
| | - Elisabetta Gini
- Department of Biotechnologies and Life Sciences, University of Insubria, Varese, Italy
- Department of Surgical and Morphological Sciences, University of Insubria, Varese, Italy
| | - Annalisa Grimaldi
- Department of Biotechnologies and Life Sciences, University of Insubria, Varese, Italy
| | - Barbara Bassani
- Department of Biotechnologies and Life Sciences, University of Insubria, Varese, Italy
- Scientific and Technology Park, IRCCS MultiMedica, Milano, Italy
| | - Silvio De Flora
- Department of Health Sciences, University of Genoa, Genoa, Italy
| | - Magda de Eguileor
- Department of Biotechnologies and Life Sciences, University of Insubria, Varese, Italy
| | - Douglas M Noonan
- Department of Biotechnologies and Life Sciences, University of Insubria, Varese, Italy
- Scientific and Technology Park, IRCCS MultiMedica, Milano, Italy
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Chiatante D, Tognetti R, Scippa GS, Congiu T, Baesso B, Terzaghi M, Montagnoli A. Interspecific variation in functional traits of oak seedlings (Quercus ilex, Quercus trojana, Quercus virgiliana) grown under artificial drought and fire conditions. J Plant Res 2015; 128:595-611. [PMID: 25968344 DOI: 10.1007/s10265-015-0729-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 02/13/2015] [Indexed: 05/08/2023]
Abstract
To face summer drought and wildfire in Mediterranean-type ecosystems, plants adopt different strategies that involve considerable rearrangements of biomass allocation and physiological activity. This paper analyses morphological and physiological traits in seedlings of three oak species (Quercus ilex, Quercus trojana and Quercus virgiliana) co-occurring under natural conditions. The aim of this study was to evaluate species-specific characteristics and the response of these oak seedlings to drought stress and fire treatment. Seedlings were kept in a growth chamber that mimicked natural environmental conditions. All three species showed a good degree of tolerance to drought and fire treatments. Differences in specific biomass allocation patterns and physiological traits resulted in phenotypic differences between species. In Q. ilex, drought tolerance depended upon adjustment of the allocation pattern. Q. trojana seedlings undergoing mild to severe drought presented a higher photosystem II (PSII) efficiency than control seedlings. Moreover, Q. trojana showed a very large root system, which corresponded to higher soil area exploitation, and bigger leaf midrib vascular bundles than the other two species. Morphological and physiological performances indicated Q. trojana as the most tolerant to drought and fire. These characteristics contribute to a high recruitment potential of Q. trojana seedlings, which might be the reason for the dominance of this species under natural conditions. Drought increase as a result of climate change is expected to favour Q. trojana, leading to an increase in its spatial distribution.
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Affiliation(s)
- D Chiatante
- Department of Biotechnology and Life Science, University of Insubria, 21100, Varese, Italy
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Raspanti M, Reguzzoni M, Protasoni M, Congiu T. Mineralization-related modifications in the calcifying tendons of turkey (Meleagris gallopavo). Micron 2015; 71:46-50. [DOI: 10.1016/j.micron.2015.01.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 01/20/2015] [Accepted: 01/22/2015] [Indexed: 10/24/2022]
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De Biasio F, Riviello L, Bruno D, Grimaldi A, Congiu T, Sun YF, Falabella P. Expression pattern analysis of odorant-binding proteins in the pea aphid Acyrthosiphon pisum. Insect Sci 2015; 22:220-234. [PMID: 24591440 DOI: 10.1111/1744-7917.12118] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/18/2014] [Indexed: 06/03/2023]
Abstract
Odorant-binding proteins (OBPs) are soluble proteins mediating chemoreception in insects. In previous research, we investigated the molecular mechanisms adopted by aphids to detect the alarm pheromone (E)-β-farnesene and we found that the recognition of this and structurally related molecules is mediated by OBP3 and OBP7. Here, we show the differential expression patterns of 5 selected OBPs (OBP1, OBP3, OBP6, OBP7, OBP8) obtained performing quantitative RT-PCR and immunolocalization experiments in different body parts of adults and in the 5 developmental instars, including winged and unwinged morphs, of the pea aphid Acyrthosiphon pisum. The results provide an overall picture that allows us to speculate on the relationship between the differential expression of OBPs and their putative function. The expression of OBP3, OBP6, and OBP7 in the antennal sensilla suggests a chemosensory function for these proteins, whereas the constant expression level of OBP8 in all instars could suggest a conserved role. Moreover, OBP1 and OBP3 are also expressed in nonsensory organs. A light and scanning electron microscopy study of sensilla on different body parts of aphid, in particular antennae, legs, mouthparts, and cornicles-cauda, completes this research providing a guide to facilitate the mapping of OBP expression profiles.
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Affiliation(s)
- Filomena De Biasio
- Dipartimento di Scienze, Università della Basilicata, via dell' Ateneo Lucano 10, 85100, Potenza
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Pazzaglia UE, Sibilia V, Congiu T, Pagani F, Ravanelli M, Zarattini G. Setup of a bone aging experimental model in the rabbit comparing changes in cortical and trabecular bone: Morphological and morphometric study in the femur. J Morphol 2015; 276:733-47. [DOI: 10.1002/jmor.20374] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2014] [Revised: 12/16/2014] [Accepted: 01/21/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Ugo E. Pazzaglia
- Department of Medical and Surgical SpecialtiesRadiological Sciences and Public Health, University of BresciaBrescia Italy
| | - Valeria Sibilia
- Department of Medical Biotechnology and Translational MedicineUniversity of MilanMilano Italy
| | - Terenzio Congiu
- Department of Surgical and Morphological SciencesUniversity of InsubriaVarese Italy
| | - Francesca Pagani
- Department of Medical Biotechnology and Translational MedicineUniversity of MilanMilano Italy
| | - Marco Ravanelli
- Department of Medical and Surgical SpecialtiesRadiological Sciences and Public Health, University of BresciaBrescia Italy
| | - Guido Zarattini
- Department of Medical and Surgical SpecialtiesRadiological Sciences and Public Health, University of BresciaBrescia Italy
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Pennarossa G, Maffei S, Tettamanti G, Congiu T, deEguileor M, Gandolfi F, Brevini TAL. Intercellular bridges are essential for human parthenogenetic cell survival. Mech Dev 2015; 136:30-9. [PMID: 25700933 DOI: 10.1016/j.mod.2015.02.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 02/12/2015] [Accepted: 02/13/2015] [Indexed: 12/25/2022]
Abstract
Parthenogenetic cells, obtained from in vitro activated mammalian oocytes, display multipolar spindles, chromosome malsegregation and a high incidence of aneuploidy, probably due to the lack of paternal contribution. Despite this, parthenogenetic cells do not show high rates of apoptosis and are able to proliferate in a way comparable to their biparental counterpart. We hypothesize that a series of adaptive mechanisms are present in parthenogenetic cells, allowing a continuous proliferation and ordinate cell differentiation both in vitro and in vivo. Here we identify the presence of intercellular bridges that contribute to the establishment of a wide communication network among human parthenogenetic cells, providing a mutual exchange of missing products. Silencing of two molecules essential for intercellular bridge formation and maintenance demonstrates the key function played by these cytoplasmic passageways that ensure normal cell functions and survival, alleviating the unbalance in cellular component composition.
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Affiliation(s)
- Georgia Pennarossa
- Laboratory of Biomedical Embryology, UniStem, Center For Stem Cell Research, Department of Health, Animal Science and Food Safety, Università degli Studi di Milano, Milan, Italy
| | - Sara Maffei
- Laboratory of Biomedical Embryology, UniStem, Center For Stem Cell Research, Department of Health, Animal Science and Food Safety, Università degli Studi di Milano, Milan, Italy
| | - Gianluca Tettamanti
- Department of Biotechnology and Life Sciences, Università degli Studi dell'Insubria, Varese, Italy
| | - Terenzio Congiu
- Department of Surgical and Morphological Science, Università degli Studi dell'Insubria, Varese, Italy
| | - Magda deEguileor
- Department of Biotechnology and Life Sciences, Università degli Studi dell'Insubria, Varese, Italy
| | - Fulvio Gandolfi
- Laboratory of Biomedical Embryology, UniStem, Center For Stem Cell Research, Department of Health, Animal Science and Food Safety, Università degli Studi di Milano, Milan, Italy
| | - Tiziana A L Brevini
- Laboratory of Biomedical Embryology, UniStem, Center For Stem Cell Research, Department of Health, Animal Science and Food Safety, Università degli Studi di Milano, Milan, Italy.
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Pasqualetti S, Congiu T, Banfi G, Mariotti M. Alendronate rescued osteoporotic phenotype in a model of glucocorticoid-induced osteoporosis in adult zebrafish scale. Int J Exp Pathol 2015; 96:11-20. [PMID: 25603732 DOI: 10.1111/iep.12106] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [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: 04/11/2014] [Accepted: 10/18/2014] [Indexed: 12/22/2022] Open
Abstract
Long-term effects of glucocorticoid treatment in humans induce bone loss and increase the risk of fracture in the skeleton. The pathogenic mechanisms of glucocorticoid-induced osteoporosis (GIOP) are still unclear. The GIOP and its effects have been reproduced in several animal models including Danio rerio (zebrafish) embryo. The treatment of adult fish with prednisolone (PN) has shown a dose-dependent decrease of mineralized matrix in the scales. Large resorption lacunae are characterized by single TRAP-positive cells which migrate to the margin of the scale merging into a multinucleated structures. The treatment with PN of cultured scales did not increase TRAP activity suggesting that the massive presence of osteoclasts in the resorption sites could be likely the result of a systemic recruitment of monocyte-macrophage precursors. We observed that treatment with PN induced a significant decrease of the alkaline phosphatase (ALP) activity in scale scleroblasts if compared with untreated controls. Then, we investigated the total mineral balance under prednisolone treatment using a time-dependent double live staining. The untreated fish fully repaired the resorption lacuna induced by prednisolone, whereas treated fish failed. The presence of osteoclast resorption fingerprints on new matrix suggested that the osteoclast activity counterbalances the osteodepositive activity exerted by scleroblasts. The treatment with PN in association with alendronate (AL) has surprisingly resulted in a significant decrease of TRAP activity and increase of ALP compared to PN-treated fish in biochemical and histological assays confirming the action of alendronate against GIOP in fish as well in humans.
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Franzetti E, Romanelli D, Caccia S, Cappellozza S, Congiu T, Rajagopalan M, Grimaldi A, de Eguileor M, Casartelli M, Tettamanti G. The midgut of the silkmoth Bombyx mori is able to recycle molecules derived from degeneration of the larval midgut epithelium. Cell Tissue Res 2015; 361:509-28. [DOI: 10.1007/s00441-014-2081-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 11/26/2014] [Indexed: 02/02/2023]
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Scanzano A, Schembri L, Rasini E, Luini A, Dallatorre J, Legnaro M, Bombelli R, Congiu T, Cosentino M, Marino F. Adrenergic modulation of migration, CD11b and CD18 expression, ROS and interleukin-8 production by human polymorphonuclear leukocytes. Inflamm Res 2015; 64:127-35. [PMID: 25561369 DOI: 10.1007/s00011-014-0791-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 11/24/2014] [Accepted: 11/27/2014] [Indexed: 01/18/2023] Open
Abstract
OBJECTIVES Adrenergic modulation of immunity has been extensively characterized, however, few information exist regarding polymorphonuclear leukocytes (PMN), despite their key role in immunity and inflammation. We investigated the effect of adrenergic agents on human PMN migration, CD11b and CD18 expression, reactive oxygen species (ROS) and interleukin (IL)-8 production, and on adrenoceptor (AR) expression. METHODS Migration was measured by the Boyden chamber assay, CD11b/CD18 expression was assessed by flow cytometry, intracellular ROS were detected by spectrofluorimetry, and IL-8 was quantitated by standard ELISA assay. AR mRNA levels were measured by real-time PCR and PMN morphology was studied by scanning electron microscopy. RESULTS Adrenaline(A), noradrenaline and the β-AR agonist isoprenaline reduced N-formyl-Met-Leu-Phe (fMLP)-induced migration, CD11b/CD18 expression, and ROS production, without affecting IL-8. The effect of A on CD11b was antagonized by yohimbine and propranolol, and increased by prazosin. The effect on ROS production was completely abolished by propranolol. PMN expressed α(1A)-, α(1B)-, α(1D)-, α(2A)-, α(2C)-, β(1)-, β(2)-, and β(3)-AR mRNA. A prevented fMLP-induced morphological changes of PMN. CONCLUSIONS Adrenergic agents reduced PMN responses mainly through β-AR, although α-AR may contribute at least to CD11b expression. AR-operated pathways in PMN should be investigated in disease conditions and in the response to therapeutic agents.
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Affiliation(s)
- Angela Scanzano
- Center for Research in Medical Pharmacology, University of Insubria, Via Ottorino Rossi n.9, 21100, Varese VA, Italy,
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Congiu T, Pazzaglia UE, Basso P, Quacci D. Chemical etching in processing cortical bone specimens for scanning electron microscopy. Microsc Res Tech 2014; 77:653-60. [DOI: 10.1002/jemt.22383] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 05/05/2014] [Accepted: 05/12/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Terenzio Congiu
- Dipartimento di Morfologia Umana; Università dell'Insubria; 21100 Varese Italy
| | - Ugo E. Pazzaglia
- Clinica Ortopedica dell'Università di Brescia; Spedali Civili di Brescia 25123 Brescia Italy
| | - Petra Basso
- Dipartimento di Morfologia Umana; Università dell'Insubria; 21100 Varese Italy
| | - Daniela Quacci
- Dipartimento di Morfologia Umana; Università dell'Insubria; 21100 Varese Italy
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Cerri L, Geroli L, Al Oum M, Basso P, Donati S, Vinciguerra R, Galli A, Cattaneo J, Congiu T, Nubile M, Gambi A, Gallenga PE, Azzolini C. [Battery of rockets "Scedosporium Apiospermum" in mycotic keratitis]. J Fr Ophtalmol 2014; 37:269-70. [PMID: 24576568 DOI: 10.1016/j.jfo.2013.11.002] [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] [Received: 07/26/2013] [Revised: 11/04/2013] [Accepted: 11/22/2013] [Indexed: 11/28/2022]
Affiliation(s)
- L Cerri
- Clinica Oculistica, Università degli Studi dell'Insubria, Ospedale di Circolo e Fondazione Macchi Varese, Viale Borri 57, 21100 Varese, Italie
| | - L Geroli
- Clinica Oculistica, Università degli Studi dell'Insubria, Ospedale di Circolo e Fondazione Macchi Varese, Viale Borri 57, 21100 Varese, Italie
| | - M Al Oum
- Clinica Oculistica, Università degli Studi dell'Insubria, Ospedale di Circolo e Fondazione Macchi Varese, Viale Borri 57, 21100 Varese, Italie
| | - P Basso
- Clinica Oculistica, Università degli Studi dell'Insubria, Ospedale di Circolo e Fondazione Macchi Varese, Viale Borri 57, 21100 Varese, Italie
| | - S Donati
- Clinica Oculistica, Università degli Studi dell'Insubria, Ospedale di Circolo e Fondazione Macchi Varese, Viale Borri 57, 21100 Varese, Italie
| | - R Vinciguerra
- Clinica Oculistica, Università degli Studi dell'Insubria, Ospedale di Circolo e Fondazione Macchi Varese, Viale Borri 57, 21100 Varese, Italie
| | - A Galli
- Clinica Oculistica, Università degli Studi dell'Insubria, Ospedale di Circolo e Fondazione Macchi Varese, Viale Borri 57, 21100 Varese, Italie
| | - J Cattaneo
- Clinica Oculistica, Università degli Studi dell'Insubria, Ospedale di Circolo e Fondazione Macchi Varese, Viale Borri 57, 21100 Varese, Italie
| | - T Congiu
- Clinica Oculistica, Università degli Studi dell'Insubria, Ospedale di Circolo e Fondazione Macchi Varese, Viale Borri 57, 21100 Varese, Italie
| | - M Nubile
- Università degli Studi "G. D'Annunzio" di Chieti-Pescara, 66100 Chieti, Italie
| | - A Gambi
- Dipartimento di Salute Pubblica, ASL2 Abruzzo, 66100 Chieti, Italie
| | - P E Gallenga
- Università degli Studi "G. D'Annunzio" di Chieti-Pescara, 66100 Chieti, Italie
| | - C Azzolini
- Clinica Oculistica, Università degli Studi dell'Insubria, Ospedale di Circolo e Fondazione Macchi Varese, Viale Borri 57, 21100 Varese, Italie.
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Pazzaglia UE, Congiu T, Sibilia V, Quacci D. Osteoblast-osteocyte transformation. A SEM densitometric analysis of endosteal apposition in rabbit femur. J Anat 2014; 224:132-41. [PMID: 24251983 PMCID: PMC3969057 DOI: 10.1111/joa.12138] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/14/2013] [Indexed: 11/28/2022] Open
Abstract
Transformation of osteoblasts into osteocytes is marked by changes in volume and cell shape. The reduction of volume and the entrapment process are correlated with the synthesis activity of the cell which decreases consequently. This transformation process has been extensively investigated by transmission electron microscopy (TEM) but no data have yet been published regarding osteoblast-osteocyte dynamic histomorphometry. Scanning electron microscope (SEM) densitometric analysis was carried out to determine the osteoblast and open osteocyte lacunae density in corresponding areas of a rabbit femur endosteal surface. The lining cell density was 4900.1 ± 30.03 n mm(-2), the one of open osteocyte lacunae 72.89 ± 22.55 n mm(-2). This corresponds to an index of entrapment of one cell every 67.23 osteoblasts (approximated by defect). The entrapment sequence begins with flattening of the osteoblast and spreading of equatorial processes. At first these are covered by the new apposed matrix and then also the whole cellular body of the osteocyte undergoing entrapment. The dorsal aspect of the cell membrane suggests that closure of the osteocyte lacuna may be partially carried out by the same osteoblast-osteocyte which developed a dorsal secretory territory. A significant proportion of the endosteal surface was analysed by SEM, without observing any evidence of osteoblast mitotic figures. This indicates that recruitment of the pool of osteogenic cells in cortical bone lamellar systems occurs prior to the entrapment process. No further additions occurred once osteoblasts were positioned on the bone surface and began lamellar apposition. The number of active osteoblasts on the endosteal surface exceeded that of the cells which become incorporated as osteocytes (whose number was indicated by the number of osteocyte lacunae). Therefore such a balance must be equilibrated by the osteoblasts' transformation in resting lining cells or by apoptosis. The current work characterised osteoblast shape changes throughout the entrapment process, allowing approximate calculation of an osteoblast entrapment index in the rabbit endosteal cortex.
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Affiliation(s)
- Ugo E Pazzaglia
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of BresciaBrescia, Italy
| | - Terenzio Congiu
- Department of Surgical and Morphological Sciences, University of InsubriaVarese, Italy
| | - Valeria Sibilia
- Department of Medical Biotechnology and Translational Medicine, University of MilanMilan, Italy
| | - Daniela Quacci
- Department of Surgical and Morphological Sciences, University of InsubriaVarese, Italy
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Pazzaglia UE, Congiu T, Brunelli PC, Magnano L, Benetti A. The long bone deformity of osteogenesis imperfecta III: analysis of structural changes carried out with scanning electron microscopic morphometry. Calcif Tissue Int 2013; 93:453-61. [PMID: 23929220 DOI: 10.1007/s00223-013-9771-1] [Citation(s) in RCA: 12] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2013] [Accepted: 07/01/2013] [Indexed: 10/26/2022]
Abstract
The wedges of the mid-diaphyseal osteotomies carried out to correct the femoral and/or tibial native deformity in type III osteogenesis imperfecta (OI III) were used to study the remodeling patterns and lamellar organization at the level of the major deformity. Histology and scanning electron microscopy (SEM) morphology showed abnormal cortical remodeling characterized by the failure to form a cylinder of compact bone with a regular marrow canal. Atypical, flattened, and large resorption lacunae with a wide resorption front on one side and systems of parallel lamellae on the opposite side were observed, resembling those formerly reported as drifting osteons. SEM morphometry documented a higher percentage of nonossified vascular/resorption area (44.3 %) in OI than in controls (13.6 %), a lower density of secondary osteons, and lower values for the parameters expressing the individual osteon size. The mean osteon total area, the mean central canal area, and the mean osteon bone area of two selected, randomized populations of secondary osteons were significantly higher (p < 0.001, p = 0.028, and p < 0.001, respectively) in control bones than in OI. The mean ossified matrix area was not significantly different, but the mean secondary osteon number and mean density were higher in controls (both p < 0.001). Osteon wedges were carried out to correct the native deformity of OI III and morphologic analysis suggested that the abnormal remodeling pattern (with "drifting osteons") may result from the altered load and tensile stresses on the deformed tubular bones.
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Affiliation(s)
- Ugo E Pazzaglia
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy,
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Pazzaglia UE, Congiu T, Pienazza A, Zakaria M, Gnecchi M, Dell'orbo C. Morphometric analysis of osteonal architecture in bones from healthy young human male subjects using scanning electron microscopy. J Anat 2013; 223:242-54. [PMID: 23834434 DOI: 10.1111/joa.12079] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/10/2013] [Indexed: 11/28/2022] Open
Abstract
The shape and structure of bones is a topic that has been studied for a long time by morphologists and biologists with the goal of explaining the laws governing their development, aging and pathology. The osteonal architecture of tibial and femoral mid-diaphyses was examined morphometrically with scanning electron microscopy in four healthy young male subjects. In transverse sections of the mid-diaphysis, the total area of the anterior, posterior, lateral and medial cortex sectors was measured and analysed for osteonal parameters including osteon number and density, osteon total and bone area and vascular space area. Osteons were grouped into four classes including cutting heads (A), transversely cut osteons (B), longitudinally cut osteons (C) and sealed osteons (D). The morphometric parameters were compared between the inner (endosteal) and outer (periosteal) half of the cortex. Of 5927 examined osteons, 24.4% cutting heads, 71.1% transversely cut osteons, 2.3% longitudinally cut osteons and 2.2% sealed osteons were found. The interosteonic bone (measured as the area in a lamellar system that has lost contact with its own central canal) corresponded to 51.2% of the endosteal and 52.4% of the periosteal half-cortex. The mean number of class A cutting heads and class B osteons was significantly higher in the periosteal than in the endosteal half-cortex (P < 0.001 and P < 0.05, respectively), whereas there was no significant difference in density. The mean osteon total area, osteon bone area and vascular space area of both classes A and B were significantly higher (P < 0.001 for all three parameters) in the endosteal than in the periosteal half-cortex. The significant differences between the two layers of the cortex suggest that the osteoclast activity is distributed throughout the whole cortical thickness, with more numerous excavations in the external layer, but larger resorption lacunae closer to the marrow canal. A randomly selected population of 109 intact class B osteons was examined at higher magnification (350×) to count osteocyte lacuna and to analyse their relationship with osteon size parameters. The distribution frequency of the mean number of osteocyte lacunae increased with the increment in the sub-classes of osteon bone area, whereas the density did not show significant differences. The number of osteocyte lacunae had a direct correlation with the osteon bone area and the mean osteon wall thickness, as well as the mean number of lamellae. The osteocyte lacunae density showed an inverse relationship. These data suggest a biological regulation of osteoblast activity with a limit to the volume of matrix produced by each cell and proportionality with the number of available cells in the space of the cutting cone (total osteon area). The collected data can be useful as a set of control parameters in healthy human bone for studies on bone aging and metabolic bone diseases.
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Affiliation(s)
- Ugo E Pazzaglia
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Italy.
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Falchi AM, Sogos V, Saba F, Piras M, Congiu T, Piludu M. Astrocytes shed large membrane vesicles that contain mitochondria, lipid droplets and ATP. Histochem Cell Biol 2012; 139:221-31. [PMID: 23108569 DOI: 10.1007/s00418-012-1045-x] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/17/2012] [Indexed: 12/24/2022]
Abstract
Various cells types, including stem and progenitor cells, can exchange complex information via plasma membrane-derived vesicles, which can carry signals both in their limiting membrane and lumen. Astrocytes, traditionally regarded as mere supportive cells, play previously unrecognized functions in neuronal modulation and are capable of releasing signalling molecules of different functional significance. In the present study, we provide direct evidence that human fetal astrocytes in culture, expressing the same feature as immature and reactive astrocytes, release membrane vesicles larger than the microvesicles described up to now. We found that these large vesicles, ranging from 1-5 to 8 μm in diameter and expressing on their surface β1-integrin proteins, contain mitochondria and lipid droplets together with ATP. We documented vesicle content with fluorescent-specific dyes and with the immunocytochemistry technique we confirmed that mitochondria and lipid droplets were co-localized in the same vesicle. Scanning electron microscopy and transmission electron microscopy confirmed that astrocytes shed from surface membrane vesicles of the same size as the ones detected by fluorescence microscopy. Our results report for the first time that cultured astrocytes, activated by repetitive stimulation of ATP released from neighboring cells, shed from their surface large membrane vesicles containing mitochondria and lipid droplets.
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Affiliation(s)
- Angela Maria Falchi
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria Monserrato, 09042 Monserrato, CA, Italy.
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Pazzaglia UE, Congiu T. The cast imaging of the osteon lacunar-canalicular system and the implications with functional models of intracanalicular flow. J Anat 2012; 222:193-202. [PMID: 23082756 DOI: 10.1111/joa.12004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2012] [Indexed: 11/30/2022] Open
Abstract
A casting technique with methyl-methacrylate (MMA) was applied to the study of the osteon lacunar-canalicular network of human and rabbit cortical bone. The MMA monomer infiltration inside the vascular canals and from these into the lacunar-canalicular system was driven by capillarity, helped by evaporation and the resulting negative pressure in a system of small pipes. There was uniform, centrifugal penetration of the resin inside some osteons, but this was limited to a depth of four to five layers of lacunae. Moreover, not all of the osteon population was infiltrated. This failure can be the result of one of two factors: the incomplete removal of organic debris from the canal and canalicular systems, and lack of drainage at the osteon external border. These data suggest that each secondary osteon is a closed system with a peripheral barrier (represented by the reversal line). As the resin advances into the osteon, the air contained inside the canalicula is compressed and its pressure increases until infiltration is stopped. The casts gave a reliable visualization of the lacunar shape, position and connections between the lacunae without the need for manipulations such as cutting or sawing. Two systems of canalicula could be distinguished, the equatorial, which connected the lacunae (therefore the osteocytes) lying on the same concentric level, and the radial, which established connections between different levels. The equatorial canalicula radiated from the lacunar border forming ramifications on a planar surface around the lacuna, whereas the radial canalicula had a predominantly straight direction perpendicular to the equatorial plane. The mean length of the radial canalicula was 40.12 ± 10.26 μm in rabbits and 38.4 ± 7.35 μm in human osteons; their mean diameter was 174.4 ± 71.12 nm and 195.7 ± 79.58 nm, respectively. The mean equatorial canalicula diameter was 237 ± 66.04 nm in rabbit and 249.7 ± 73.78 nm in human bones, both significantly larger (P < 0.001) than the radial. There were no significant differences between the two species. The lacunar surface measured on the equatorial plane was higher in rabbit than in man, but the difference was not statistically significant. The cast of the lacunar-canalicular network obtained with the reported technique allows a direct, 3-D representation of the system architecture and illustrates how the connections between osteocytes are organized. The comparison with models derived by the assumption of the role of hydraulic conductance and other mechanistic functions provides descriptive, morphological data to the ongoing discussion on the Haversian system biology.
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Affiliation(s)
- Ugo E Pazzaglia
- Department of Specialità Chirurgiche, Scienze Radiologiche, Mediche e Sanità Pubblica, Orthopaedic Clinic of the University of Brescia, Italy.
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