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Glucose-lowering agents and reduced risk of incident non-alcoholic fatty liver disease:new insights

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Hepatobiliary Surgery and Nutrition 2022年第1期11卷 156-160页

作者： Alessandro mantovani Rosa Lombardi Andrea Dalbeni Section of Endocrinology Diabetes and MetabolismDepartment of MedicineUniversity and Azienda Ospedaliera Universitaria Integrata of VeronaVeronaItaly Unit of Internal Medicine and Metabolic Disease Fondazione IRCCS Ca’Granda Ospedale Maggiore PoliclinicoMilanItaly Department of Pathophysiology and Transplantation Universitàdegli Studi di MilanoMilanItaly Section of General Medicine C and Liver Unit University and Azienda Ospedaliera Universitaria Integrata of VeronaVeronaItaly

Non-alcoholic fatty liver disease(NAFLD)is classically defined as the hepatic manifestation of metabolic syndrome(1).Histologically,NAFLD covers a range of conditions,spanning from simple steatosis to non-alcoholic steatohepatitis(NASH)and cirrhosis(2).At present,NAFLD is the most frequent chronic liver disease seen in clinical practice in high-income countries,as it affects nearly 30%of adults in the general population,up to 70%of patients with type 2 diabetes(T2DM)and almost all patients with obesity(2).

关键词： NAFLD liver hepatic

Effect of silver in thermal treatments of Fe-Mn-C degradable metals:Implications for stent processing

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Bioactive Materials 2022年第6期7卷 30-41页

作者： Sergio Loffredo Sofia Gambaro Francesco Copes Carlo Paternoster Nicolas Giguere Maurizio Vedani Diego mantovani Laboratory for Biomaterials and Bioengineering Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in SurgeryDepartment of Min-Met-Materials EngineeringResearch Center of CHU de QuebecDivision of Regenerative MedicineLaval UniversityQuebec CityQC G1V 0A6Canada Department of Mechanical Engineering Politecnico di MilanoMilan20156Italy National Research Council Institute of Condensed Matter Chemistry and Technologies for Energy CNR-ICMATEGenoa16149Italy Quebec Metallurgy Center CMQ Trois-RivieresQCG9A 5E1Canada

Twinning-induced plasticity(TWIP)steels are considered excellent materials for manufacturing products requiring extremely high mechanical properties for various applications including thin medical devices,such as biodegradable intravascular *** is also proven that the addition of Ag can guarantee an appropriate degradation while implanted in human body without affecting its bioactive *** order to develop an optimized manufacturing process for thin stents,the effect of Ag on the recrystallization behavior of TWIP steels needs to be *** is of major importance since manufacturing stents involves several intermediate recrystallization annealing *** this work,the recrystallization mechanism of two Fe-Mn-C steels with and without Ag was thoroughly investigated by microstructural and mechanical *** was observed that Ag promoted a finer microstructure with a different texture evolution,while the recrystallization kinetics resulted *** presence of Ag also reduced the effectiveness of the recrystallization *** behavior was attributed to the presence of Ag-rich second phase particles,precipitation of carbides and to the preferential development of grains possessing a{111}orientation upon thermal *** prominence of{111}grains can also give rise to premature twinning,explaining the role of Ag in reducing the ductility of TWIP steels already observed in other ***,in vitro biological performances were unaffected by *** findings could allow the design of efficient treatments for supporting the transformation of Fe-Mn-C steels alloyed with Ag into commercial products.

关键词： Twinning Recrystallization Biomaterials Silver Steels

Surface processing for iron-based degradable alloys:A preliminary study on the importance of acid pickling

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Bioactive Materials 2022年第5期7卷 166-180页

作者： Leticia Marin de Andrade Carlo Paternoster Pascale Chevallier Sofia Gambaro Paolo Mengucci Diego mantovani Laboratory for Biomaterials and Bioengineering Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in SurgeryDepartment of Min-Met-Materials EngineeringResearch Center of CHU de QuebecDivision of Regenerative MedicineLaval UniversityQuebec CityQCG1V 0A6Canada National Research Council Institute of Condensed Matter Chemistry and Technologies for Energy CNR-ICMATEGenoa16149Italy Polytechnic University of Marche Ancona60121Italy

The formation of a heterogeneous oxidized layer,also called scale,on metallic surfaces is widely recognized as a rapid manufacturing event for metals and their *** or total removal of the scale represents a mandatory integrated step for the industrial fabrication processes of medical *** biodegradable metals,acid pickling has already been reported as a preliminary surface preparation given further processes,such as ***,biodegradable medical prototypes presented discrepancies concerning acid pickling studies based on samples with less complex geometry(e.g.,non-uniform scale removal and rougher surface).Indeed,this translational knowledge lacks a detailed investigation on this process,deep characterization of treated surfaces properties,as well as a comprehensive discussion of the involved *** this study,the effects of different acidic media(HCl,HNO_(3),H_(3)PO_(4),CH_(3)COOH,H_(2)SO_(4) and HF),maintained at different temperatures(21 and 60℃)for various exposition time(15-240 s),on the chemical composition and surface properties of a Fe-13Mn-1.2C biodegradable alloy were *** in mass loss,morphology and wettability evidenced the combined effect of temperature and time for all *** in HCl and HF solutions favor mass loss(0.03-0.1 g/cm^(2))and effectively remove the initial scale.

关键词： Biodegradable metals Iron-based alloys Acid pickling Surface finishing Pre-treatment

Proteomics as a tool to gain next level insights into photo-crosslinkable biopolymer modifications

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Bioactive Materials 2022年第11期7卷 204-220页

作者： Nele Pien Fabrice Bray Tom Gheysens Liesbeth Tytgat Christian Rolando Diego mantovani Peter Dubruel Sandra Van Vlierberghe Ghent University Polymer Chemistry and Biomaterials Research GroupCentre of Macromolecular Chemistry(CMaC)Krijgslaan 281 S4bis9000 GentBelgium Laval University Laboratory for Biomaterials and BioengineeringCRC-IPavillon PouliotQuebec G1V 0A6Canada Univ.Lille CNRSUSR 3290MSAPMiniaturisation pour la Synthese l’Analyse et la ProteomiqueF-59000LilleFrance

The distribution of photo-crosslinkable moieties onto a protein backbone can affect a biomaterial’s crosslinking behavior, and therefore also its mechanical and biological properties. A profound insight in this respect is essential for biomaterials exploited in tissue engineering and regenerative medicine. In the present work, photo-crosslinkable moieties have been introduced on the primary amine groups of: (i) a recombinant collagen peptide (RCPhC1) with a known amino acid (AA) sequence, and (ii) bovine skin collagen (COL BS) with an unknown AA sequence. The degree of substitution (DS) was quantified with two conventional techniques: an ortho-phthalic dialdehyde (OPA) assay and ^(1)H NMR spectroscopy. However, neither of both provides information on the exact type and location of the modified AAs. Therefore, for the first time, proteomic analysis was evaluated herein as a tool to identify functionalized AAs as well as the exact position of photo-crosslinkable moieties along the AA sequence, thereby enabling an in-depth, unprecedented characterization of functionalized photo-crosslinkable biopolymers. Moreover, our strategy enabled to visualize the spatial distribution of the modifications within the overall structure of the protein. Proteomics has proven to provide unprecedented insight in the distribution of photo-crosslinkable moieties along the protein backbone, undoubtedly contributing to superior functional biomaterial design to serve regenerative medicine.

关键词： (Photo-crosslinkable)biomaterials Chemical modifications Biomaterial characterization Proteomics Localization of functionalizations

Rare horizontal transmission does not hide long-term inheritance of SINE highly conserved domains in the metazoan evolution

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Current Zoology 2016年第6期62卷 667-674页

作者： Andrea LUCHETTI Barbara mantovani Dipartimento di Scienze Biologiche Geologiche e Ambientali--Universit~ di Bologna Via Selmi 3 Bologna 40126Italy

Transposable elements (TEs) are self-replicating, mobile DNA sequences which constitute a significant fraction of eukaryotic genomes. They are generally considered selfish DNA, as their replication and random insertion may have deleterious effects on genome functionalities, although some beneficial effects and evolutionary potential have been recognized. Short interspersed elements (SINEs) are non-autonomous TEs with a modular structure: a small RNA-related head, a body, and a long interspersed element-related tail. Despite their high turnover rate and emergence, the body may retain highly conserved domains (HCDs) shared among divergent SINE families: in metazoans, at least nine HCD-SINEs have been recognized. Data mining on public molecular databases allowed the retrieval of 16 new HCD-SINE families from cnidarian, molluscs, arthropods, and vertebrates. Tracking the ancestry of HCDs on the metazoan phylogeny revealed that some of them date back to the Radiata-Bilateria split. Moreover, phylogenetic and age divergence analyses of the most ancient HCDs suggested that long-term vertical inheritance is the rule, with few horizontal transfer events. We suggest that the evolutionary conservation of HCDs may be linked to their potential to serve as recombination hotspots. This indirectly affects host genomes by maintaining active and diverse SINE lineages, whose insertions may impact (either positively or negatively) on the evolution of the genome.

关键词：动物进化结构域正弦水平传播保守 DNA序列传承自我复制

Immunomodulatory biomaterials against bacterial infections:Progress,challenges,and future perspectives

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The Innovation 2023年第6期4卷 101-114页

作者： Shutao Zhang Hongtao Yang Minqi Wang Diego mantovani Ke Yang Frank Witte Lili Tan Bing Yue Xinhua Qu Department of Bone and Joint Surgery Department of OrthopedicsRenji HospitalShanghai Jiaotong University School of MedicineShanghai 200001China School of Engineering Medicine Beihang UniversityBejjing 100191China Laboratory for Biomaterials and Bioengineering Canada Research Chair 1 in Biomaterials and Bioengineering for the Innovation in SurgeryDepartment of Min-Met-MaterialsEngineeringResearch Center of CHU de QuebecDivision of Regenerative MedicineL aval UniversityQuebec CityQC G1V 0A6Canada Institute of Metal Research Chinese Academy of SciencesShenyang 110016China Department of Prosthodontics Geriatic Dentistry and Craniomandibular DisordersCharite Medical UniversityAssmannshauser Strasse 4-614197 BerlinGermany

Bacterial infectious diseases are one of the leading causes of death *** with the use of multiple antibiotic treatment strategies,4.95 million people died from drug-resistant bacterial infections in *** 2050,the number of deaths will reach 10 milion *** increasing mortality may be partly due to bacterial heterogeneity in the infection microenvironment,such as drug-resistant bacteria,biofilms,persister cells,intracellular bacteria,and small colony *** addition,the complexity of the immune microenvironment at different stages of infection makes biomaterials with direct antimicrobial activity unsatisfactory for the longterm treatment of chronic bacterial *** increasing mortality may be partly attributed to the biomaterials failing to modulate the active antimicrobial action of immune ***,there is an urgent need for effective alternatives to treat bacterial ***,the development of immunomodulatory antimicrobial biomaterials has recently received considerable interest;however,a comprehensive review of their research progress is *** this review,we focus mainly on the research progress and future perspectives of immunomodulatory antimicrobial biomaterials used at different stages of ***,we describe the characteristics of the immune microenvironment in the acute and chronic phases of bacterial ***,we highlight the immunomodulatory strategies for antimicrobial biomaterials at different stages of infection and their corresponding advantages and ***,we discuss biomaterial-mediated bacterial vaccines'potential applications and challenges for activating innate and adaptive immune *** review will serve as a reference for future studies to develop next-generation immunomodulatory biomaterials and accelerate their translation into clinical practice.

关键词： infections biomaterials modulator

A microfluidic approach for development of hybrid collagen-chitosan extracellular matrix-like membranes for on-chip cell cultures

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Journal of Materials Science & Technology 2021年第4期63卷 54-61页

作者： Erica Rosella Nan Jia Diego mantovani Jesse Greener Laboratory Department of ChemistryLaval UniversityQuébecQCCanada Laboratory of Biomaterials and Bioengineering CRC-1Dept.Min-Met-Materials Eng&CHU de QuebecResearch CenterLaval UniversityQuébecQCCanada CHU de Quebec Research Centre Laval University10 rue de l’EspinayQuébecQC G1L 3L5Canada

To advance organ-on-a-chip development and other areas befitting from physiologically-relevant biomembranes,a microfluidic platform is presented for synthesis of biomembranes during gelation and investigation into their role as extracellular matrix *** this work,high-throughput studies of collagen,chitosan,and collagen-chitosan hybrid biomembranes were carried out to characterize and compare key properties as a function of the applied hydrodynamic conditions during ***,depending on the biopolymer material used,varying flow conditions during biomembrane gelation caused width,uniformity,and swelling ratio to be differently affected and ***,cell viability studies of seeded fibroblasts were conducted,thus showing the potential for biological applications.

关键词： matrix swelling showing

Improving the radiopacity of Fe-Mn biodegradable metals by magnetron-sputtered W-Fe-Mn-C coatings:Application for thinner stents

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Bioactive Materials 2022年第6期7卷 64-70页

作者： Samira Ravanbakhsh Carlo Paternoster Gianni Barucca Paolo Mengucci Sofia Gambaro Theophraste Lescot Pascale Chevallier a Marc-Andre Fortin Diego mantovani Laboratory for Biomaterials and Bioengineering Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in SurgeryDepartment of Min-Met-Materials EngineeringResearch Center of CHU de QuebecDivision of Regenerative MedicineLaval UniversityQuebec CityQuebec G1V 0A6Canada Laboratory for Biomaterials in Imaging(BIM) Axe Medecine RegeneratriceCentre Hospitalier Universitaire(CHU)de Quebec-Universite Laval2705boul.Laurier(T1-61a)QuebecG1V 4G2Canada Department of Materials Environmental Sciences and Urban PlanningUniversita Politecnica delle Marchevia Brecce Bianche 1260131AnconaItaly National Research Council Institute of Condensed Matter Chemistry and EnergyCNR-ICMATEVia de Marini 616149GenovaItaly Departement de Genie des Mines de la Metallurgie et des MateriauxCentre de Recherche sur les Materiaux Avances(CERMA)Universite LavalQuebecG1V 0A6Canada Axe Medecine Regeneratrice Centre Hospitalier Universitaire(CHU)de Quebec-Universite Laval2705boul.Laurier(T1-61a)QuebecG1V 4G2Canada

In this exploratory work,micrometric radiopaque W-Fe-Mn-C coatings were produced by magnetron sputtering plasma deposition,for the first time,with the aim to make very thin Fe-Mn stents trackable by *** power of Fe-13Mn-1.2C target was kept constant at 400 W while that of W target varied from 100 to 400 W producing three different coatings referred to as P100,P200,*** effect of the increased W power on coatings thickness,roughness,structure,corrosion behavior and radiopacity was *** coatings showed a power-dependent thickness and W concentration,different roughness values while a similar and uniform columnar *** amorphous phase was detected for both P100 and P200 coatings while γ-Fe,bcc-W and W_(3)C phases found for ***,P200 and P400 showed a significantly higher corrosion rate(CR)compared to *** presence of W,W_(3)C as well as the Fe amount variation determined two different micro-galvanic corrosion mechanisms significantly changing the CR of coatings,0.26±0.02,59.68±1.21 and 59.06±1.16μm/year for P100,P200 and P400,*** P200 with its most uniform morphology,lowest roughness(RMS=3.9±0.4 nm)and good radiopacity(~6%)appeared the most suitable radiopaque biodegradable coating investigated in this study.

关键词： Fe-Mn-Based alloys Degradable coatings W-Fe-Mn-C coatings Magnetron sputtering Radiopacity Stent fluoroscopy

Senescence in adipose-derived stem cells and its implications in nerve regeneration

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Neural Regeneration Research 2014年第1期9卷 10-15页

作者： Cristina mantovani Giorgio Terenghi Valerio Magnaghi Dipartimento di Scienze Farmacologiche e Biomolecolari Universitàdegli Studi di Milano Blond McIndoe Laboratories Faculty of Medical and Human SciencesThe University of Manchester

Adult mesenchymal stem cells, specifically adipose-derived stem cells have self-renewal and multiple differentiation potentials and have shown to be the ideal candidate for therapeutic applications in regenerative medicine, particularly in peripheral nerve regeneration. Adipose-de- rived stem cells are easily harvested, although they may show the effects of aging, hence their potential in nerve repair may be limited by cellular senescence or donor age. Cellular senescence is a complex process whereby stem cells grow old as consequence of intrinsic events （e.g., DNA damage） or environmental cues （e.g., stressful stimuli or diseases）, which determine a permanent growth arrest. Several mechanisms are implicated in stem cell senescence, although no one is exclusive of the others. In this review we report some of the most important factors modulating the senescence process, which can influence adipose-derived stem cell morphology and function, and compromise their clinical application for peripheral nerve regenerative cell therapy.

关键词： aging adipose-derived stem cell DNA damage p38 p53 mitochondria Sirtuins pe- ripheral nervous system