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Ballerini J, Yahiaoui D, Giovando G, Ferraris A. E-commerce channel management on the manufacturers’ side: ongoing debates and future research pathways. Rev Manag Sci 2023. [PMCID: PMC10029799 DOI: 10.1007/s11846-023-00645-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/24/2023]
Abstract
Since the beginning of the 2000s, online commerce has been gradually taking over and shaping the global marketplace. This has led several scholars to study the phenomenon from different angles, from consumer habits to privacy risks to related technological innovations. However, only recently has a branch of literature addressing the online channel management phenomenon from the manufacturers’ perspective emerged. This rapidly expanding literature strand remains rather fragmented, raising the need for a systematic literature review to comprehensively structure and discuss it. This study, accordingly, proposes a systematic literature review on online channel management from the manufacturers’ perspective. Firstly, it provides relevant bibliometric insights into the ongoing research on the topic. Secondly, applying the bibliographic coupling methodology individuates 92 interconnected contributions published by 31 December 2021. Three different, albeit interconnected, thematic clusters are discovered and reviewed, revealing their focus on (a) strategic marketing issues around manufacturervsretailer conflict, (b) pricing policies and trade-offs among pricevsservices, and (c) operational interactions and strategies between supply chain members. Finally, after a systematic literature review the authors develop thirteen original research propositions concerning new research pathways and theoretical advancements to be designed and implemented.
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Affiliation(s)
- Jacopo Ballerini
- grid.7605.40000 0001 2336 6580University of Turin, Turin, Italy
- grid.12380.380000 0004 1754 9227Vrije Universiteit, Amsterdam, The Netherlands
| | - Dorra Yahiaoui
- grid.464611.00000 0004 0623 3438Kedge Business School, Marseille, France
| | - Guido Giovando
- grid.7605.40000 0001 2336 6580University of Turin, Turin, Italy
| | - Alberto Ferraris
- grid.7605.40000 0001 2336 6580University of Turin, Turin, Italy
- grid.412761.70000 0004 0645 736XLaboratory for International and Regional Economics, Graduate School of Economics and Management, Ural Federal University, Yekaterinburg, Russia
- European Centre for Business Research, Pan-European University, Bratislava, Czech Republic
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Troise C, Bresciani S, Ferraris A, Santoro G. Equity crowdfunding for university spin-offs: Unveiling the motivations, benefits, and risks related to its adoption. Journal of Small Business Management 2023. [DOI: 10.1080/00472778.2023.2182443] [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] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- Ciro Troise
- Department of Management, University of Turin, Italy
| | - Stefano Bresciani
- Department of Management, University of Turin, Italy
- Department of Industrial Systems Management, Faculty of Materials Science and Technology, VSB-Technical University of Ostrava, Czech Republic
| | - Alberto Ferraris
- Department of Management, University of Turin, Italy
- Laboratory for International and Regional Economics, Graduate School of Economics and Management, Ural Federal University, Russia
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Sumbal MS, Ključnikov A, Durst S, Ferraris A, Saeed L. Do you want to retain your relevant knowledge? The role of contextual factors in the banking sector. JKM 2023. [DOI: 10.1108/jkm-02-2022-0128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Purpose
Retaining critical knowledge is relevant for all organizations, knowledge-intensive ones in particular. Failure to do so can, in the worst case, lead to an organization being unable to act. Acknowledging the role of context in this regard, the purpose of this paper is to examine knowledge retention (KR) in the banking sector of a developing country. A particular focus is placed on exploring various contextual factors that influence the retention of critical knowledge taking into consideration the setting.
Design/methodology/approach
Following a qualitative research design, semi-structured interviews were conducted with senior managers from private and public banks in Pakistan. Thematic analysis was used to analyze the data.
Findings
The findings suggest that the existence of a collectivist society, gender differences, few job opportunities, power distance and the late IT Boom are vital factors to be considered regarding KR in the setting studied. The findings are summarized in a conceptual framework that highlights critical factors of KR to be studied in a broader context and which are viewed as relevant for informing future research in this underdeveloped area of knowledge management (KM).
Research limitations/implications
The data were collected from a small number of individuals working in different banks in only one country. Future studies should consider research designs across multiple organizations involving more people representing different roles, functions and age groups.
Originality/value
Existing KM research has emphasized the role of context while research on KR is underdeveloped in this regard. By exploring different contextual factors this study advances current understanding in the KM domain.
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Ranjbari M, Shams Esfandabadi Z, Gautam S, Ferraris A, Scagnelli SD. Waste management beyond the COVID-19 pandemic: Bibliometric and text mining analyses. Gondwana Res 2023; 114:124-137. [PMID: 35153532 PMCID: PMC8816840 DOI: 10.1016/j.gr.2021.12.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 12/15/2021] [Accepted: 12/22/2021] [Indexed: 05/05/2023]
Abstract
The outbreak of the COVID-19 pandemic has significantly increased the demand for personal protective equipment, in particular face masks, thus leading to a huge amount of healthcare waste generated worldwide. Consequently, such an unprecedented amount of newly emerged waste has posed significant challenges to practitioners, policy-makers, and municipal authorities involved in waste management (WM) systems. This research aims at mapping the COVID-19-related scientific production to date in the field of WM. In this vein, the performance indicators of the target literature were analyzed and discussed through conducting a bibliometric analysis. The conceptual structure of COVID-19-related WM research, including seven main research themes, were uncovered and visualized through a text mining analysis as follows: (1) household and food waste, (2) personnel safety and training for waste handling, (3) sustainability and circular economy, (4) personal protective equipment and plastic waste, (5) healthcare waste management practices, (6) wastewater management, and (7) COVID-19 transmission through infectious waste. Finally, a research agenda for WM practices and activities in the post-COVID-19 era was proposed, focusing on the following three identified research gaps: (i) developing a systemic framework to properly manage the pandemic crisis implications for WM practices as a whole, following a systems thinking approach, (ii) building a circular economy model encompassing all activities from the design stage to the implementation stage, and (iii) proposing incentives to effectively involve informal sectors and local capacity in decentralizing municipal waste management, with a specific focus on developing and less-developed countries.
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Affiliation(s)
- Meisam Ranjbari
- Department of Economics and Statistics "Cognetti de Martiis", University of Turin, Torino, Italy
- ESSCA School of Management, Lyon, France
| | - Zahra Shams Esfandabadi
- Department of Environment, Land and Infrastructure Engineering (DIATI), Politecnico di Torino, Torino, Italy
- Energy Center Lab, Politecnico di Torino, Torino, Italy
| | - Sneha Gautam
- Karunya Institute of Technology and Sciences, Coimbatore, Tamil Nadu, India
| | - Alberto Ferraris
- Department of Management, University of Turin, Torino, Italy
- Laboratory for International and Regional Economics, Graduate School of Economics and Management, Ural Federal University, Russia
- Faculty of Economics and Business, University of Rijeka, Croatia
| | - Simone Domenico Scagnelli
- Department of Management, University of Turin, Torino, Italy
- School of Business and Law, Edith Cowan University, Joondalup, Australia
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Palmucci DN, Ferraris A. Climate change inaction: Cognitive bias influencing managers' decision making on environmental sustainability choices. The role of empathy and morality with the need of an integrated and comprehensive perspective. Front Psychol 2023; 14:1130059. [PMID: 36949910 PMCID: PMC10025319 DOI: 10.3389/fpsyg.2023.1130059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 02/13/2023] [Indexed: 03/08/2023] Open
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Lythreatis S, El-Kassar AN, Smart P, Ferraris A. Correction to: Participative leadership, ethical climate and responsible innovation perceptions: evidence from South Korea. Asia Pac J Manag 2022. [DOI: 10.1007/s10490-022-09864-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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Abstract
Purpose
This study aims to examine the role of organisational democracy (OD) in facilitating the knowledge sharing (KS) process within companies, thus considering the effect of different OD principles.
Design/methodology/approach
The authors used data collected through a questionnaire on a sample of 254 employees at private universities and colleges to test the relationship between OD and KS. Data were analysed using the structural equation modelling technique.
Findings
Overall, OD has a direct and significant effect on facilitating KS in organisations. Also, the results showed that there are different degrees and intensities among the individual principles (sub-concepts) of OD and KS.
Practical implications
The findings highlight the important role of democracy in an organisation to enhance the organisational climate and employees’ behaviours, thus leading to higher KS outcomes. Also, results, provide an opportunity for managers to consider enhancing democracy in an organisation for improving internal collaboration effectiveness in KS.
Originality/value
This paper sheds light and adds new knowledge to embryonic studies that are directed towards the integration of democracy within the main concept of knowledge management (KM). This emphasises the need to use and stimulate OD and its principles for improving the effectiveness of KM practices with specific attention to KS.
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Ranjbari M, Shams Esfandabadi Z, Ferraris A, Quatraro F, Rehan M, Nizami AS, Gupta VK, Lam SS, Aghbashlo M, Tabatabaei M. Biofuel supply chain management in the circular economy transition: An inclusive knowledge map of the field. Chemosphere 2022; 296:133968. [PMID: 35181422 DOI: 10.1016/j.chemosphere.2022.133968] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 12/30/2021] [Revised: 02/08/2022] [Accepted: 02/11/2022] [Indexed: 06/14/2023]
Abstract
Investment in biofuels, as sustainable alternatives for fossil fuels, has gained momentum over the last decade due to the global environmental and health concerns regarding fossil fuel consumption. Hence, effective management of biofuel supply chain (BSC) components, including biomass feedstock production, biomass logistics, biofuel production in biorefineries, and biofuel distribution to consumers, is crucial in transitioning towards a low-carbon and circular economy (CE). The present study aims to render an inclusive knowledge map of the BSC-related scientific production. In this vein, a systematic review, supported by a keywords co-occurrence analysis and qualitative content analysis, was carried out on a total of 1,975 peer-reviewed journal articles in the target literature. The analysis revealed four major research hotspots in the BSC literature, namely (1) biomass-to-biofuel supply chain design and planning, (2) environmental impacts of biofuel production, (3) biomass to bioenergy, and (4) techno-economic analysis of biofuel production. Besides, the findings showed that the following subject areas of research in the BSC research community have recently attracted more attention: (i) global warming and climate change mitigation, (ii) development of the third-generation biofuels produced from algal biomass, which has recently gained momentum in the CE debate, and (iii) government incentives, pricing, and subsidizing policies. The provided insights shed light on the understanding of researchers, stakeholders, and policy-makers involved in the sustainable energy sector by outlining the main research backgrounds, developments, and tendencies within the BSC arena. Looking at the provided knowledge map, potential research directions in BSCs towards implementing the CE model, including (i) integrative policy convergence at macro, meso, and micro levels, and (ii) industrializing algae-based biofuel production towards the CE transition, were proposed.
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Affiliation(s)
- Meisam Ranjbari
- Henan Province Forest Resources Sustainable Development and High-value Utilization Engineering Research Center, School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China; Department of Economics and Statistics "Cognetti de Martiis", University of Turin, Turin, Italy.
| | - Zahra Shams Esfandabadi
- Department of Environment, Land and Infrastructure Engineering (DIATI), Politecnico di Torino, Turin, Italy; Energy Center Lab, Politecnico di Torino, Turin, Italy
| | - Alberto Ferraris
- Department of Management, University of Turin, Turin, Italy; Laboratory for International and Regional Economics, Graduate School of Economics and Management, Ural Federal University, Russia; Faculty of Economics and Business, University of Rijeka, Croatia
| | - Francesco Quatraro
- Department of Economics and Statistics "Cognetti de Martiis", University of Turin, Turin, Italy; BRICK, Collegio Carlo Alberto, Piazza Arbarello 8, 10123, Turin, Italy
| | - Mohammad Rehan
- Center of Excellence in Environmental Studies (CEES), King Abdulaziz University, Jeddah, Saudi Arabia
| | - Abdul-Sattar Nizami
- Center of Excellence in Environmental Studies (CEES), King Abdulaziz University, Jeddah, Saudi Arabia; Sustainable Development Study Centre, Government College University, Lahore, Pakistan
| | - Vijai Kumar Gupta
- Biorefining and Advanced Materials Research Center, Scotland's Rural College (SRUC), Kings Buildings, West Mains Road, Edinburgh, EH9 3JG, UK; Centre for Safe and Improved Foods, Scotland's Rural College (SRUC), Kings Buildings, West Mains Road, Edinburgh, EH9 3JG, UK
| | - Su Shiung Lam
- Henan Province Forest Resources Sustainable Development and High-value Utilization Engineering Research Center, School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China; Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia.
| | - Mortaza Aghbashlo
- Henan Province Forest Resources Sustainable Development and High-value Utilization Engineering Research Center, School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China; Department of Mechanical Engineering of Agricultural Machinery, Faculty of Agricultural Engineering and Technology, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
| | - Meisam Tabatabaei
- Henan Province Forest Resources Sustainable Development and High-value Utilization Engineering Research Center, School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China; Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia; Biofuel Research Team (BRTeam), Terengganu, Malaysia.
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Di Cianni F, Cardelli C, Italiano N, Laurino E, Moretti M, Depascale R, Gamba A, Iaccarino L, Doria A, Sousa Bandeira MJ, Dinis SP, C Romão V, Alessandri E, Gotelli E, Paolino S, DI Giosaffatte N, Grammatico P, Ferraris A, Cavagna L, Montecucco C, Longo V, Beretta L, Cavazzana I, Fredi M, Tincani A, D’urzo R, Bombardieri S, Burmester GR, Cutolo M, Fonseca JE, Frank CH, Galetti I, Hachulla E, Houssiau F, Marinello D, Müller-Ladner U, Schneider M, Smith V, Talarico R, Van Laar JM, Vieira A, Tani C, Mosca M. POS1232 LONG-TERM OUTCOMES OF COVID-19 VACCINATION IN PATIENTS WITH RARE AND COMPLEX CONNECTIVE TISSUE DISEASES: AN AD-INTERIM ANALYSIS OF ERN-ReCONNET VACCINATE STUDY. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.2465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundSince the COVID-19 vaccination campaign was launched all over Europe, there has been general agreement on how benefits of SARS-CoV2 vaccines outweigh the risks in patients with rare connective tissue diseases (rCTDs). Yet, there is still limited evidence regarding safety and efficacy of such vaccines in these patients, especially in the long-term. For this reason, in the framework of ERN-ReCONNET, an observational long-term study (VACCINATE) was designed in order to explore the long-term outcome of COVID-19 vaccination in rCTDs patients. The consent form was developed thanks to the involvement of the ERN ReCONNET ePAG Advocates (European Patients Advocacy Group).ObjectivesTo evaluate the safety profile of COVID-19 vaccination in rCTDs patients and the potential impact on disease activity. Primary endpoints were the prevalence of adverse events (AEs) and of disease exacerbations post-vaccination. Secondary endpoints were the proportion of serious adverse events (SAEs) and adverse events of special interest for COVID-19 (adapted from https://brightoncollaboration.us/wp-content/uploads/2021/01/SO2_D2.1.2_V1.2_COVID-19_AESI-update-23Dec2020-review_final.pdf)MethodsThe first ad-interim analysis of the VACCINATE study involved 9 ERN-ReCONNET Network centres. Patients over 18 years of age with a known rCTD and who received vaccine against COVID-19 were eligible for recruitment. Demographic data and diagnoses were collected at the time of enrolment, while the appearance of AEs and potential disease exacerbations were monitored after one week from each vaccination dose, and then after 4, 12 and 24 weeks from the second dose. A disease exacerbation was defined as at least one of the following: new manifestations attributable to disease activity, hospitalization, increase in PGA from previous evaluation, addition of corticosteroids or immunosuppressants.ResultsA cohort of 300 patients (261 females, mean age 52, range 18-85) was recruited. Systemic lupus erythematosus (44%) and systemic sclerosis (16%) were the most frequent diagnoses, followed by Sjogren’s syndrome (SS,12%), idiopathic inflammatory myositis (IMM,10%), undifferentiated connective tissue disease (UCTD,8%), mixed connective tissue disease (MCTD,4%), Ehlers-Danlos’s syndrome (EDS,4%), antiphospholipid syndrome (APS,2%). AEs appearing 7 days after the first and second doses were reported in 93 (31%) and 96 (32%) patients respectively, mainly represented by fatigue, injection site reaction, headache, fever and myalgia. Otitis, urticaria, Herpes Simplex-related rash, stomatitis, migraine with aura, vertigo, tinnitus and sleepiness were reported with very low frequency. Less than 2% of patients experienced AEs within 24 weeks from the second dose. No SAEs or AEs of special interest were observed in the study period. There were 25 disease exacerbations (8%), 7 of which severe. The highest number of exacerbations was observed after 4 weeks from the second dose (12 within week 4, 6 within week 12 and 7 within week 24). Disease exacerbation was most frequent in patients with EDS (33%) and MCTD (25%).ConclusionThis preliminary analysis shows that COVID-19 vaccination is safe in rCTDs patients. AEs appear most often early after vaccination and are usually mild. Disease exacerbations are not frequent, but can be potentially severe and tend to occur most frequently within the first month after vaccination. Exacerbations can also occur 3-6 months after vaccination, although a causal relationship with the vaccination remains to be established. Our present data underline the importance of long-term observational studies.Table 1.AEs and disease exacerbations per diseaseDiagnosisPatients enrolled (%) (n=300)EAs after 1st and 2nd dose (%)Exacerbations (%)APS25714EDS45033IIM10527MCTD44225SS12598SLE44698SSC16492UCTD850-AcknowledgementsVACCINATE is a study promoted by the European Reference Network on rare and complex connective tissue diseases, ERN ReCONNET. This publication was funded by the European Union’s Health Programme (2014-2020)Disclosure of InterestsNone declared
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Bresciani S, Ciampi F, Meli F, Ferraris A. Using big data for co-innovation processes: Mapping the field of data-driven innovation, proposing theoretical developments and providing a research agenda. International Journal of Information Management 2021. [DOI: 10.1016/j.ijinfomgt.2021.102347] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Santoro G, Ferraris A, Del Giudice M, Schiavone F. Self‐efficacy and Success of Disadvantaged Entrepreneurs: The Moderating Role of Resilience. European Management Review 2020. [DOI: 10.1111/emre.12394] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Gabriele Santoro
- Department of Management University of Torino Corso Unione Sovietica, 218 bis 10134 Turin, Italy
| | - Alberto Ferraris
- Department of Management University of Torino Corso Unione Sovietica, 218 bis 10134 Turin, Italy
- Research Fellow of the Laboratory for International and Regional Economics Graduate School of Economics and Management, Ural Federal University Yekaterinburg Russia
| | - Manlio Del Giudice
- University of Rome “Link Campus” Via Nomentana, 335 00162 Rome Italy
- Paris School of Business 59 rue Nationale 75013 Paris France
| | - Francesco Schiavone
- Paris School of Business 59 rue Nationale 75013 Paris France
- Francerthenope University of Naples Via Generale Parisi, 13 80132 Naples, Italy
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Benso J, de Sanctis G, Ferraris A, Angriman F, Otero LF, Ducatenzeiler L. Predictive risk factors of in-hospital mortality in adult patients with carbapenem and colistin resistant Klebsiella pneumoniae infections: a retrospective cohort study. Int J Infect Dis 2018. [DOI: 10.1016/j.ijid.2018.04.3689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Abstract
Purpose
The link between mergers and acquisitions (M&A) and innovation has been analysed in both corporate finance studies and the innovation literature. Despite this attention and the practical evidence that highlights different connections between these two terms, there is a need to investigate the latest trends with regard to these important topics, and to put a particular focus on the emerging paradigm of open innovation. Thus, this paper aims to provide a systematic literature review (SLR) about the relationship between M&As and the concept of innovation in the current scenario.
Design/methodology/approach
Through an SLR from 2012 to June 2017, 55 papers have been identified and analysed to give a better understanding of the motivations and the methodologies adopted in past studies.
Findings
This paper identifies various conceptual and research methodological characteristics of studies that have connected, directly or indirectly, M&As and innovation in recent years. In addition, the results highlight a scarcity of studies that explicitly or implicitly refer to the open innovation paradigm, marking only a partial understanding of this emerging phenomenon.
Originality/value
This paper improves the knowledge on the link between extraordinary corporate transactions and innovation, and it highlights that a clear consensus, particularly regarding the open innovation paradigm, is lacking. Thus the authors propose that future studies should carefully evaluate M&As by following the open innovation approach.
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Niceta M, Margiotti K, Digilio MC, Guida V, Bruselles A, Pizzi S, Ferraris A, Memo L, Laforgia N, Dentici ML, Consoli F, Torrente I, Ruiz-Perez VL, Dallapiccola B, Marino B, De Luca A, Tartaglia M. Biallelic mutations in DYNC2LI1 are a rare cause of Ellis-van Creveld syndrome. Clin Genet 2018; 93:632-639. [PMID: 28857138 DOI: 10.1111/cge.13128] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 07/31/2017] [Accepted: 08/15/2017] [Indexed: 01/15/2023]
Abstract
Ellis-van Creveld syndrome (EvC) is a chondral and ectodermal dysplasia caused by biallelic mutations in the EVC, EVC2 and WDR35 genes. A proportion of cases with clinical diagnosis of EvC, however, do not carry mutations in these genes. To identify the genetic cause of EvC in a cohort of mutation-negative patients, exome sequencing was undertaken in a family with 3 affected members, and mutation scanning of a panel of clinically and functionally relevant genes was performed in 24 additional subjects with features fitting/overlapping EvC. Compound heterozygosity for the c.2T>C (p.Met1?) and c.662C>T (p.Thr221Ile) variants in DYNC2LI1, which encodes a component of the intraflagellar transport-related dynein-2 complex previously found mutated in other short-rib thoracic dysplasias, was identified in the 3 affected members of the first family. Targeted resequencing detected compound heterozygosity for the same missense variant and a truncating change (p.Val141*) in 2 siblings with EvC from a second family, while a newborn with a more severe phenotype carried 2 DYNC2LI1 truncating variants. Our findings indicate that DYNC2LI1 mutations are associated with a wider clinical spectrum than previously appreciated, including EvC, with the severity of the phenotype likely depending on the extent of defective DYNC2LI1 function.
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Affiliation(s)
- M Niceta
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - K Margiotti
- Department of Experimental Medicine, Policlinico Umberto 1, Università "Sapienza", Rome, Italy.,Molecular Genetics Unit, Ospedale Casa Sollievo della Sofferenza, IRCCS, San Giovanni Rotondo, Italy
| | - M C Digilio
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - V Guida
- Molecular Genetics Unit, Ospedale Casa Sollievo della Sofferenza, IRCCS, San Giovanni Rotondo, Italy
| | - A Bruselles
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy
| | - S Pizzi
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - A Ferraris
- Molecular Genetics Unit, Ospedale Casa Sollievo della Sofferenza, IRCCS, San Giovanni Rotondo, Italy
| | - L Memo
- Pediatric Unit, Ospedale San Martino, Belluno, Italy
| | - N Laforgia
- Department of Biomedical Science and Human Oncology, Università di Bari, Bari, Italy
| | - M L Dentici
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - F Consoli
- Molecular Genetics Unit, Ospedale Casa Sollievo della Sofferenza, IRCCS, San Giovanni Rotondo, Italy
| | - I Torrente
- Molecular Genetics Unit, Ospedale Casa Sollievo della Sofferenza, IRCCS, San Giovanni Rotondo, Italy
| | - V L Ruiz-Perez
- Department of Experimental Models of Human Diseases, Instituto de Investigaciones Biomédicas "Alberto Sols", CSIC-UAM, Madrid, Spain.,CIBER de enfermedades Raras (CIBERER), ISCIII, València, Spain.,Instituto de Genética Médica y Molecular (INGEMM), Hospital Universitario La Paz, Madrid, Spain
| | - B Dallapiccola
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - B Marino
- Department of Pediatrics, Università "Sapienza", Rome, Italy
| | - A De Luca
- Molecular Genetics Unit, Ospedale Casa Sollievo della Sofferenza, IRCCS, San Giovanni Rotondo, Italy
| | - M Tartaglia
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, Rome, Italy
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Szmulewicz AG, Angriman F, Samamé C, Ferraris A, Vigo D, Strejilevich SA. Dopaminergic agents in the treatment of bipolar depression: a systematic review and meta-analysis. Acta Psychiatr Scand 2017; 135:527-538. [PMID: 28256707 DOI: 10.1111/acps.12712] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/24/2017] [Indexed: 01/03/2023]
Abstract
OBJECTIVE To systematically examine the effects of dopaminergic agents (modafinil, armodafinil, pramipexole, methylphenidate, and amphetamines) on bipolar depression outcomes. METHODS Meta-analysis of randomized controlled trials was performed to assess the efficacy and safety of treatment with dopaminergic agents in bipolar depression. In a secondary analysis, findings from both randomized controlled trials and high-quality observational studies were pooled by means of meta-analytic procedures to explore dopaminergic treatment-related new mania. RESULTS Nine studies (1716 patients) were included in our meta-analysis of randomized controlled trials. Treatment with dopaminergic agents for bipolar depression was associated with an increase in both response (1671 individuals, RR 1.25, 95% CI 1.05 to 1.50) and remission rates (1671 individuals, RR 1.40, 95% CI 1.14, 1.71). There was no evidence of an increased risk of mood switch associated with this treatment (1646 individuals, RR 0.96, 95% CI 0.49, 1.89). Our secondary analysis (1231 individuals) yielded a cumulative incidence of mood switch of 3% (95% CI 1.0, 5.0) during a mean follow-up period of 7.5 months. CONCLUSIONS Preliminary findings suggest that dopaminergic agents may represent a useful alternative for the treatment of bipolar depression, with no evidence for a related increase in the risk of mood destabilization during short-term follow-up.
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Affiliation(s)
- A G Szmulewicz
- Hospital de Emergencias Psiquiátricas Torcuato de Alvear, Buenos Aires, Argentina.,Bipolar Disorder Program, Neuroscience Institute, Favaloro University, Buenos Aires, Argentina.,Pharmacology Department, University of Buenos Aires School of Medicine, Buenos Aires, Argentina
| | - F Angriman
- Pharmacology Department, University of Buenos Aires School of Medicine, Buenos Aires, Argentina.,Internal Medicine Department, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - C Samamé
- Bipolar Disorder Program, Neuroscience Institute, Favaloro University, Buenos Aires, Argentina.,National Scientific and Technical Research Council (CONICET), Buenos Aires, Argentina
| | - A Ferraris
- Pharmacology Department, University of Buenos Aires School of Medicine, Buenos Aires, Argentina
| | - D Vigo
- Global Health Systems Cluster, Harvard TH Chan School of Public Health, Boston, MA, USA.,International Consortium for Bipolar Disorder Research, Mc Lean Hospital, Belmont, MA, USA.,Center for Applied Research in Mental Health and Addictions, Simon Fraser University, Vancouver, Canada
| | - S A Strejilevich
- Bipolar Disorder Program, Neuroscience Institute, Favaloro University, Buenos Aires, Argentina.,Institute of Cognitive Neurology (INECO), Buenos Aires, Argentina
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Ferraris A, Erhardt N, Bresciani S. Ambidextrous work in smart city project alliances: unpacking the role of human resource management systems. The International Journal of Human Resource Management 2017. [DOI: 10.1080/09585192.2017.1291530] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Alberto Ferraris
- Department of Management, University of Torino, Torino, Italy
- Laboratory for International and Regional Economics, Graduate School of Economics and Management, Ural Federal University, Russia
| | - Niclas Erhardt
- Maine Business School, University of Maine, Orono, ME, USA
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Rolla G, Fusaro E, Nicola S, Bucca C, Peroni C, Parisi S, Cassinis MC, Ferraris A, Angelino F, Heffler E, Boita M, Brussino L. Th-17 cytokines and interstitial lung involvement in systemic sclerosis. J Breath Res 2016; 10:046013. [PMID: 27869103 DOI: 10.1088/1752-7155/10/4/046013] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The two phenotypes of both limited and diffuse systemic sclerosis (SSc) have different forms of pulmonary involvement: pulmonary arterial hypertension (limited phenotype) or interstitial lung disease (ILD) (diffuse phenotype). We aimed to investigate whether Th17-related cytokines, as measured in exhaled breath condensate (EBC) and in serum were connected to ILD in diffuse SSc patients. We found that for both limited and diffuse SSc, the EBC levels of all cytokines and most of the cytokine serum levels were significantly higher in patients than in controls, while, the EBC levels of Th-17 cytokines and the serum levels of IL-10 and TNF-α were significantly higher in diffuse than in limited SSc. Moreover, the thoracic CT-scan score of ILD was significantly associated with the EBC levels of IL-1 beta and with the serum IL-23, TNF-α and IL-10 levels, whereas lung carbon monoxide diffusing capacity was negatively related to the EBC levels of IL-1 beta, IL-17 and serum IL-10. Serum IL-23 was also inversely correlated with vital capacity. In conclusion, in diffuse SSc patients our results show a clear link between Th-17 cytokines measured both in EBC and in serum with interstitial lung involvement. This highlights how important it is to target Th-17 cytokines when developing new treatments for lung fibrosis.
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Affiliation(s)
- G Rolla
- Medical Science, University of Turin, Turin, Italy
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Nicola S, Fusaro E, Rolla G, Bucca C, Peroni C, Heffler E, Cassinis M, Ferraris A, Boita M, Parisi S, Brussino L. AB0643 Th-17 Cytokines and Interstitial Lung Involvement in Systemic Sclerosis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.5626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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21
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Bresciani S, Ferraris A. Innovation-receiving subsidiaries and dual embeddedness: impact on business performance. Baltic Journal of Management 2016. [DOI: 10.1108/bjm-11-2014-0200] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Purpose
– The purpose of this paper is to investigate the relationship between the degree of subsidiary’s external and internal embeddedness and the contribution on subsidiary’s business performance of a received innovation. In particular it focusses on dual embeddedness of the subsidiary that receives an innovation from the rest of the MNC’s network.
Design/methodology/approach
– Using Amadeus databases were selected 93 CEE subsidiaries located in six countries. Data were collected through a standardized questionnaire and three hypothesis were tested through an OLS regression model.
Findings
– The results indicate that the two types of embeddedness positively affect the received innovation’s contribution on business performance. Moreover, the inclusion of the interaction term shows how a simultaneously high level of embeddedness in both external and internal business networks lead to a multiplicative and positive effect on subsidiary’s business performance. This means that external and internal embeddedness are not mutually exclusive suggesting, at the same time, the presence of interdependencies between the two networks that leads the “dual embedded” subsidiary to better received innovation performance.
Research limitations/implications
– The results are limited due to the sample characteristics and the conceptual focus of network theory. Regarding the first point, the results are derived from MNC coming from developed European countries that are geographically proximate. Regarding the second point, this approach neglects the limitations of networks.
Practical implications
– These results, therefore, propose to management the need to force the subsidiary toward a dual embeddedness in order to achieve better performance when an innovation has been received.
Social implications
– This study puts in evidence how Eastern European policy makers should increase the knowledge sharing and accumulation in the local clusters between all the stakeholders with the aim at increasing the “appeal” of this area.
Originality/value
– The specific contest in which the embedddedness component is analyzed is the main contribution of the paper because most of the previous research have been focussed on subsidiaries that develop and transfer the innovation. Moreover, the specific area where subsidiaries are located (Central and East Europe) may be another important contribution.
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22
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Farinetti A, Tomasi S, Foglio B, Ferraris A, Ponti G, Gotti S, Peretto P, Panzica GC. Testosterone and estradiol differentially affect cell proliferation in the subventricular zone of young adult gonadectomized male and female rats. Neuroscience 2014; 286:162-70. [PMID: 25481234 DOI: 10.1016/j.neuroscience.2014.11.050] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [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: 06/23/2014] [Revised: 11/19/2014] [Accepted: 11/23/2014] [Indexed: 11/17/2022]
Abstract
Steroid hormones are important players to regulate adult neurogenesis in the dentate gyrus of the hippocampus, but their involvement in the regulation of the same phenomenon in the subventricular zone (SVZ) of the lateral ventricles is not completely understood. Here, in male rats, we tested the existence of activational effects of testosterone (T) on cell proliferation in the adult SVZ. To this aim, three groups of male rats: castrated, castrated and treated with T, and controls were treated with 5-bromo-2'-deoxyuridine (BrdU) and killed after 24h. The density of BrdU-labeled cells was significantly lower in castrated animals in comparison to the other two groups, thus supporting a direct correlation between SVZ proliferation and levels of circulating T. To clarify whether this effect is purely androgen-dependent, or mediated by the T metabolites, estradiol (E2) and dihydrotestosterone (DHT), we evaluated SVZ proliferation in castrated males treated with E2, DHT and E2+DHT, in comparison to T- and vehicle-treated animals, and sham-operated controls. The stereological analysis demonstrated that E2 and T, but not DHT, increase proliferation in the SVZ of adult male rats. Quantitative evaluation of cells expressing the endogenous marker of cell proliferation phosphorylated form of Histone H3 (PHH3), or the marker of highly dividing SVZ progenitors Mash1, indicated the effect of T/E2 is mostly restricted to SVZ proliferating progenitors. The same experimental protocol was repeated on ovariectomized female rats treated with E2 or T. In this case, no statistically significant difference was found among groups. Overall, our results clearly show that the gonadal hormones T and E2 represent important mediators of cell proliferation in the adult SVZ. Moreover, we show that such an effect is restricted to males, supporting adult neurogenesis in rats is a process differentially modulated in the two sexes.
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Affiliation(s)
- A Farinetti
- Department of Neuroscience, University of Turin, 10126 Turin, Italy; NICO - Neuroscience Institute Cavalieri Ottolenghi, 10143 Orbassano, Italy.
| | - S Tomasi
- Department of Neuroscience, University of Turin, 10126 Turin, Italy; NICO - Neuroscience Institute Cavalieri Ottolenghi, 10143 Orbassano, Italy
| | - B Foglio
- Department of Neuroscience, University of Turin, 10126 Turin, Italy; NICO - Neuroscience Institute Cavalieri Ottolenghi, 10143 Orbassano, Italy
| | - A Ferraris
- Department of Neuroscience, University of Turin, 10126 Turin, Italy; NICO - Neuroscience Institute Cavalieri Ottolenghi, 10143 Orbassano, Italy
| | - G Ponti
- Department of Veterinary Sciences, University of Turin, 10095 Grugliasco, Italy; NICO - Neuroscience Institute Cavalieri Ottolenghi, 10143 Orbassano, Italy
| | - S Gotti
- Department of Neuroscience, University of Turin, 10126 Turin, Italy; NICO - Neuroscience Institute Cavalieri Ottolenghi, 10143 Orbassano, Italy
| | - P Peretto
- Department of Life Sciences and Systems Biology, University of Turin, 10123 Turin, Italy; NICO - Neuroscience Institute Cavalieri Ottolenghi, 10143 Orbassano, Italy
| | - G C Panzica
- Department of Neuroscience, University of Turin, 10126 Turin, Italy; NICO - Neuroscience Institute Cavalieri Ottolenghi, 10143 Orbassano, Italy.
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Guzzi L, Nacinovich F, Pensotti C, Di Stéfano C, Ferraris A, Stamboulian D. Implant-associated infections of the spine (IAIS): retain or not retain the device; that is the question. Int J Infect Dis 2012. [DOI: 10.1016/j.ijid.2012.05.821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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24
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Pensotti C, Nacinovich F, Di Stéfano C, Thierer J, Ferraris A, Stamboulian D. Enterococcal bone and joint infections: A working group experience along 17 years. Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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25
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Pensotti C, Nacinovich F, Oses PF, Thierer J, Ferraris A, Vizzotti C, Di Stéfano C, Stamboulian D. Prosthetic joint infections: A multidisciplinary approach (1992-2008). Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.1611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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26
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Browning BL, Annese V, Barclay ML, Bingham SA, Brand S, Büning C, Castro M, Cucchiara S, Dallapiccola B, Drummond H, Ferguson LR, Ferraris A, Fisher SA, Gearry RB, Glas J, Henckaerts L, Huebner C, Knafelz D, Lakatos L, Lakatos PL, Latiano A, Liu X, Mathew C, Müller-Myhsok B, Newman WG, Nimmo ER, Noble CL, Palmieri O, Parkes M, Petermann I, Rutgeerts P, Satsangi J, Shelling AN, Siminovitch KA, Török HP, Tremelling M, Vermeire S, Valvano MR, Witt H. Gender-stratified analysis of DLG5 R30Q in 4707 patients with Crohn disease and 4973 controls from 12 Caucasian cohorts. J Med Genet 2007; 45:36-42. [PMID: 17693570 DOI: 10.1136/jmg.2007.050773] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
BACKGROUND DLG5 p.R30Q has been reported to be associated with Crohn disease (CD), but this association has not been replicated in most studies. A recent analysis of gender-stratified data from two case-control studies and two population cohorts found an association of DLG5 30Q with increased risk of CD in men but not in women and found differences between 30Q population frequencies for males and females. Male-female differences in population allele frequencies and male-specific risk could explain the difficulty in replicating the association with CD. METHODS DLG5 R30Q genotype data were collected for patients with CD and controls from 11 studies that did not include gender-stratified allele counts in their published reports and tested for male-female frequency differences in controls and for case-control frequency differences in men and in women. RESULTS The data showed no male-female allele frequency differences in controls. An exact conditional test gave marginal evidence that 30Q is associated with decreased risk of CD in women (p = 0.049, OR = 0.87, 95% CI 0.77 to 1.00). There was also a trend towards reduced 30Q frequencies in male patients with CD compared with male controls, but this was not significant at the 0.05 level (p = 0.058, OR = 0.87, 95% CI 0.74 to 1.01). When data from this study were combined with previously published, gender-stratified data, the 30Q allele was found to be associated with decreased risk of CD in women (p = 0.010, OR = 0.86, 95% CI 0.76 to 0.97), but not in men. CONCLUSION DLG5 30Q is associated with a small reduction in risk of CD in women.
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27
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Cavestany D, Blanc JE, Kulcsar M, Uriarte G, Chilibroste P, Meikle A, Febel H, Ferraris A, Krall E. Studies of the transition cow under a pasture-based milk production system: metabolic profiles. ACTA ACUST UNITED AC 2005; 52:1-7. [PMID: 15703003 DOI: 10.1111/j.1439-0442.2004.00679.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This study describes the effect of parity (multiparous versus primiparous) and body condition score (BCS) at calving (<3 or > or =3; scale 1-5) on variations of BCS, body weight (BW) and metabolic profiles in Holstein cows grazing on improved pastures. Forty-two cows were studied (21 multiparous and 21 primiparous) from 2 months before to 3 months after calving. BCS, BW and milk production were measured every 2 weeks. Blood samples were taken every 2 weeks to determine total protein, albumin, urea, non-esterified fatty acids (NEFA), beta-hydroxybutyrate (BHB), cholesterol, aspartate aminotransferase (AST), calcium, phosphorus and magnesium. Primiparous cows had lower BCS during the early postpartum (PP) period and produced less milk than multiparous. In primiparous cows NEFA concentrations were higher during the early postpartum period; BHB levels were similar in both categories during this period. Primiparous cows showed a more unbalanced metabolic profile than multiparous cows, reflecting that they are recovering from the loss of BCS after calving with less success.
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Affiliation(s)
- D Cavestany
- Department of Reproduction, Faculty of Veterinary, Lasplaces 1620, Montevideo and Paysandu, Uruguay.
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28
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Annese V, Latiano A, Palmieri O, Li HH, Forabosco P, Ferraris A, Andriulli A, Vecchi M, Ardizzone S, Cottone M, Dallapiccola B, Rappaport E, Fortina P, Devoto M. Linkage of ulcerative colitis to the pericentromeric region of chromosome 16 in Italian inflammatory bowel disease families is independent of the presence of common CARD15 mutations. J Med Genet 2004; 40:837-41. [PMID: 14627676 PMCID: PMC1735307 DOI: 10.1136/jmg.40.11.837] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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29
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Valente EM, Brancati F, Caputo V, Graham EA, Davis MB, Ferraris A, Breteler MMB, Gasser T, Bonifati V, Bentivoglio AR, De Michele G, Dürr A, Cortelli P, Filla A, Meco G, Oostra BA, Brice A, Albanese A, Dallapiccola B, Wood NW. PARK6 is a common cause of familial parkinsonism. Neurol Sci 2002; 23 Suppl 2:S117-8. [PMID: 12548371 DOI: 10.1007/s100720200097] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The Parkin gene is responsible for about 50% of autosomal recessive juvenile parkinsonism (ARJP) and less than 20% of sporadic early onset cases. We recently mapped a novel ARJP locus (PARK6) on chromosome 1p. Linkage to PARK6 was confirmed in 8 families from 4 different European countries. These families share some clinical features with the European Parkin-positive cases, with a wide range of ages at onset and slow progression. However, features typical of ARJP, such as dystonia and sleep benefit, were not observed, making the clinical presentation of late-onset cases indistinguishable from that of idiopathic PD. The determination of the smallest region of homozygosity in one consanguineous family allowed reducing the candidate interval to 9 cM. PARK6 appears to be an important locus for ARJP in Europe.
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Affiliation(s)
- E M Valente
- C.S.S. Mendel Institute, Viale Regina Margherita 261, I-00198 Rome, Italy
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Bason L, Dudley T, Lewis K, Shah U, Potsic W, Ferraris A, Fortina P, Rappaport E, Krantz ID. Homozygosity for the V37I Connexin 26 mutation in three unrelated children with sensorineural hearing loss. Clin Genet 2002; 61:459-64. [PMID: 12121355 DOI: 10.1034/j.1399-0004.2002.610611.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Mutations in the Connexin 26 (Cx26) gene have been found to account for approximately 20% of all childhood deafness. This number approaches 50% in documented recessive cases of hearing loss. Two mutations, 35delG and 167delT, account for the majority of reported mutations in this gene, but to date, more than 60 mutations have been described. No other single gene has yet been identified that contributes this significantly to the aetiology of hearing loss. Several mutations in this gene have been found to predominate in specific ethnic populations (167delT in Ashkenazi Jews and 235delC in Japanese individuals). While the majority of mutations found in Cx26 result in frame shifts and premature terminations, a number of missense mutations have also been identified. The V37I missense mutation has been reported as both a polymorphism and as a potentially disease-causing missense mutation. The present authors have identified three unrelated individuals with sensorineural hearing loss who are homozygous for this mutation. One individual is of Philippine ancestry, another is from a Chinese and Cambodian background, while the third is of Chinese ancestry, raising the possibility that this mutation may be more frequent among populations in eastern Asia.
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Affiliation(s)
- L Bason
- Division of Human Genetics, Department of Pediatrics, The Children's Hospital of Philadelphia and The University of Pennsylvania School of Medicine, Philadelphia, PA, USA
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D'Amico D, Ferraris A, Leone M, Catania A, Carlin A, Grazzi L, Bussone G. Increased plasma nitrites in migraine and cluster headache patients in interictal period: basal hyperactivity of L-arginine-NO pathway? Cephalalgia 2002; 22:33-6. [PMID: 11993611 DOI: 10.1046/j.1468-2982.2002.00304.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Nitrite concentrations in plasma were investigated in a population of migraine and cluster headache patients and a group of healthy non-headache controls. A hundred migraine patients and 69 cluster headache patients in the interictal period, and 112 controls, were studied. Significantly higher nitrite concentrations were found in migraine patients, with and without aura, and cluster headache patients, in remission and cluster phase, than in controls. These findings suggest that a basal dysfunction in the L-arginine-NO pathway may be involved in the peripheral mechanisms predisposing subjects with neurovascular headaches to individual attacks.
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Affiliation(s)
- D D'Amico
- Neurological Institute C. Besta, Milan, Italy
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Gemignani F, Ferraris A, Grosso R, Alfieri S, Melli G, Marbini A. Multifactorial Neuropathy. J Peripher Nerv Syst 2001. [DOI: 10.1046/j.1529-8027.2001.01007-28.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- F Gemignani
- Istituto de Neurologia, Università de Parma, Parma
| | - A Ferraris
- Istituto de Neurologia, Università de Parma, Parma
| | - R Grosso
- Istituto de Neurologia, Università de Parma, Parma
| | - S Alfieri
- Istituto de Neurologia, Università de Parma, Parma
| | - G Melli
- Istituto de Neurologia, Università de Parma, Parma
| | - A. Marbini
- Istituto de Neurologia, Università de Parma, Parma
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Ferraris A, Inglese C, Giuberti T, Cocca G, Melli G, Marbini A, Gemignani F. Quality Of Life In Patients With Cryoglobulinemic Polyneuropathy. J Peripher Nerv Syst 2001. [DOI: 10.1046/j.1529-8027.2001.01007-25.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- A Ferraris
- Istituto di Neurologia, Università de Parma ‐ Parma
| | - C Inglese
- Istituto di Neurologia, Università de Parma ‐ Parma
| | - T Giuberti
- Istituto di Neurologia, Università de Parma ‐ Parma
| | - G Cocca
- Istituto di Neurologia, Università de Parma ‐ Parma
| | - G Melli
- Istituto di Neurologia, Università de Parma ‐ Parma
| | - A Marbini
- Istituto di Neurologia, Università de Parma ‐ Parma
| | - F. Gemignani
- Istituto di Neurologia, Università de Parma ‐ Parma
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Bentivoglio AR, Cortelli P, Valente EM, Ialongo T, Ferraris A, Elia A, Montagna P, Albanese A. Phenotypic characterisation of autosomal recessive PARK6-linked parkinsonism in three unrelated Italian families. Mov Disord 2001; 16:999-1006. [PMID: 11748730 DOI: 10.1002/mds.10034] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The clinical features of nine patients (three women and six men) affected by PARK6-linked parkinsonism, belonging to three unrelated Italian families, are reported. The occurrence of affected men and women within one generation suggested an autosomal recessive mode of inheritance in all three families. Mean age at disease onset was 36 +/- 4.6 years; all cases except one presented with asymmetrical signs, consisting of tremor and akinesia of one upper limb or unilateral short step gait. Affected individuals had a mean age of 57 +/- 8.5 years, and average disease duration was 21 +/- 7.8 years. Parkinsonian features included benign course, early onset of drug-induced dyskinesias, and a good and persistent response to levodopa. There were no other associated features (i.e., pyramidal or cerebellar signs, dysautonomia, or diurnal fluctuations unrelated to drug treatment). Cognition was unaffected. The clinical picture was remarkably similar in all patients; no relevant family-related differences were found. PARK6 disease is a new form of early-onset parkinsonism without other atypical clinical features.
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35
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Meikle A, Sahlin L, Ferraris A, Masironi B, Blanc JE, Rodríguez-Irazoqui M, Rodríguez-Piñón M, Kindahl H, Forsberg M. Endometrial mRNA expression of oestrogen receptor alpha, progesterone receptor and insulin-like growth factor-I (IGF-I) throughout the bovine oestrous cycle. Anim Reprod Sci 2001; 68:45-56. [PMID: 11600273 DOI: 10.1016/s0378-4320(01)00143-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study characterized endometrial expression of mRNAs of oestrogen and progesterone receptors (ER, PR) and insulin-like growth factor-I (IGF-I) during the oestrous cycle. Seven Holstein heifers that showed standing oestrus on the same day (day 0) were selected and blood samples for oestradiol (E2) and progesterone (P4) determinations by RIA were taken daily until day 23. Endometrial samples were taken by transcervical biopsies on days 0, 5, 12 and 19 for mRNA determination by solution hybridization. The highest endometrial mRNA levels of ERalpha and PR were observed at oestrus and a decline was observed already at day 5, which then decreased progressively at the end of the luteal phase. IGF-I mRNA levels were higher at day 0 and 5 than at day 12. At day 19, mRNA levels of ERalpha, PR and IGF-I were the lowest in heifers that were at the end of their luteal phase (n=4), but were high again in heifers which P4 levels were basal (n=3). The temporal changes in mRNA endometrial expression of ERalpha, PR and IGF-I and their relation to the changes in steroid concentrations during the bovine oestrus cycle are described.
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Affiliation(s)
- A Meikle
- Department of Biochemistry, Veterinary Faculty, Montevideo, Uruguay.
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36
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Valente EM, Bentivoglio AR, Dixon PH, Ferraris A, Ialongo T, Frontali M, Albanese A, Wood NW. Localization of a novel locus for autosomal recessive early-onset parkinsonism, PARK6, on human chromosome 1p35-p36. Am J Hum Genet 2001; 68:895-900. [PMID: 11254447 PMCID: PMC1275643 DOI: 10.1086/319522] [Citation(s) in RCA: 346] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2001] [Accepted: 02/14/2001] [Indexed: 11/03/2022] Open
Abstract
The cause of Parkinson disease (PD) is still unknown, but genetic factors have recently been implicated in the etiology of the disease. So far, four loci responsible for autosomal dominant PD have been identified. Autosomal recessive juvenile parkinsonism (ARJP) is a clinically and genetically distinct entity; typical PD features are associated with early onset, sustained response to levodopa, and early occurrence of levodopa-induced dyskinesias, which are often severe. To date, only one ARJP gene, Parkin, has been identified, and multiple mutations have been detected both in families with autosomal recessive parkinsonism and in sporadic cases. The Parkin-associated phenotype is broad, and some cases are indistinguishable from idiopathic PD. In > or = 50% of families with ARJP that have been analyzed, no mutations could be detected in the Parkin gene. We identified a large Sicilian family with four definitely affected members (the Marsala kindred). The phenotype was characterized by early-onset (range 32-48 years) parkinsonism, with slow progression and sustained response to levodopa. Linkage of the disease to the Parkin gene was excluded. A genomewide homozygosity screen was performed in the family. Linkage analysis and haplotype construction allowed identification of a single region of homozygosity shared by all the affected members, spanning 12.5 cM on the short arm of chromosome 1. This region contains a novel locus for autosomal recessive early-onset parkinsonism, PARK6. A maximum LOD score 4.01 at recombination fraction .00 was obtained for marker D1S199.
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Affiliation(s)
- E M Valente
- Department of Clinical Neurology, Institute of Neurology, London; and Department of Neurology, Catholic University, Rome, Italy
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37
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Valente EM, Bentivoglio AR, Cassetta E, Dixon PH, Davis MB, Ferraris A, Ialongo T, Frontali M, Wood NW, Albanese A. DYT13, a novel primary torsion dystonia locus, maps to chromosome 1p36.13--36.32 in an Italian family with cranial-cervical or upper limb onset. Ann Neurol 2001; 49:362-6. [PMID: 11261511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Primary torsion dystonia (PTD) is a clinically and genetically heterogeneous group of movement disorders, usually inherited in an autosomal dominant fashion with reduced penetrance. The DYT1 gene on chromosome 9q34 is responsible for most cases of early limb-onset PTD. Two other PTD loci have been mapped to date. The DYT6 locus on chromosome 8 is associated with a mixed phenotype, whereas the DYT7 locus on chromosome 18p is associated with adult onset focal cervical dystonia Several families have been described in which linkage to the known PTD loci have been excluded. We identified a large Italian PTD family with 11 definitely affected members. Phenotype was characterized by prominent cranial-cervical and upper limb involvement and mild severity. A genome-wide search was performed in the family. Linkage analysis and haplotype construction allowed us to identify a novel PTD locus (DYT13) within a 22 cM interval on the short arm of chromosome 1, with a maximum lod score of 3.44 between the disease and marker D1S2667.
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Affiliation(s)
- E M Valente
- Department of Clinical Neurology, Institute of Neurology, London, United Kingdom
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38
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Valente EM, Bentivoglio AR, Cassetta E, Dixon PH, Davis MB, Ferraris A, Ialongo T, Frontali M, Wood NW, Albanese A. Identification of a novel primary torsion dystonia locus (DYT13) on chromosome 1p36 in an Italian family with cranial-cervical or upper limb onset. Neurol Sci 2001; 22:95-6. [PMID: 11487218 DOI: 10.1007/s100720170063] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Primary torsion dystonia (PTD) is a clinically and genetically heterogeneous group of movement disorders, usually inherited in an autosomal dominant fashion. Three PTD loci (DYT1, DYT6 and DYT7) have been identified to date. However, in several PTD families linkage to the known loci has been excluded. We identified an Italian PTD family with 11 definitely affected members. Phenotype was characterised by juvenile or early-adult onset, prominent cranial-cervical and upper limb involvement, mild course and occasional generalisation. A genome-wide search performed in the family identified a novel PTD locus (DYT13) within a 22-cM interval on the short arm of chromosome 1, with a maximum lod score of 3.44 (theta = 0) between the disease and marker D1S2667.
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39
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Veltri A, Robba T, Ferraris A, Zanon C, Gandini G. [Ablation of liver tumors with local radiofrequency hyperthermia]. Recenti Prog Med 2000; 91:307-9. [PMID: 11512390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- A Veltri
- Istituto di Radiologia, Università, Torino
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40
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Gemignani F, Ferraris A, Alfieri S, Bellanova M, Marbini A. SENSORY MANIFESTATIONS IN CHARCOT‐MARIE‐TOOTH DISEASE. J Peripher Nerv Syst 2000. [DOI: 10.1046/j.1529-8027.2000.00513-26.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- F. Gemignani
- Istituto di Neurologia, Università di Parma–Parma
| | - A. Ferraris
- Istituto di Neurologia, Università di Parma–Parma
| | - S. Alfieri
- Istituto di Neurologia, Università di Parma–Parma
| | | | - A. Marbini
- Istituto di Neurologia, Università di Parma–Parma
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41
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Ferraris A, Marbini A, Giuberti T, Garini G, Allegri I, Gemignani F. CRYOGLOBULINEMIC NEUROPATHY: A CLINICAL STUDY OF 25 CASES. J Peripher Nerv Syst 2000. [DOI: 10.1046/j.1529-8027.2000.00513-23.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- A. Ferraris
- Istituto di Neurologia, Università di Parma ‐ Parma
| | - A. Marbini
- Istituto di Neurologia, Università di Parma ‐ Parma
| | - T. Giuberti
- Istituto di Neurologia, Università di Parma ‐ Parma
| | - G. Garini
- Istituto di Neurologia, Università di Parma ‐ Parma
| | - I. Allegri
- Istituto di Neurologia, Università di Parma ‐ Parma
| | - F. Gemignani
- Istituto di Neurologia, Università di Parma ‐ Parma
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42
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Affiliation(s)
- D D'Amico
- Third Neurological Division and Headache Centre, National Neurological Institute "C.Besta", Via Celoria 11, I-20133 Milano, Italy
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43
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Leone M, Attanasio A, Croci D, D'Amico D, Grazzi L, Ferraris A, Nespolo A, Bussone G. Neuroendocrinology of cluster headache. Ital J Neurol Sci 1999; 20:S18-20. [PMID: 10662931 DOI: 10.1007/pl00014991] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- M Leone
- Third Neurological Division and Headache Centre, National Neurological Institute "C. Besta", Via Celoria 11, I-20133 Milano, Italy
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44
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D'Amico D, Moschiano F, Leone M, Ariano C, Ciusani E, Erba N, Grazzi L, Ferraris A, Schieroni F, Bussone G. Genetic abnormalities of the protein C system: shared risk factors in young adults with migraine with aura and with ischemic stroke? Cephalalgia 1998; 18:618-21; discussion 591. [PMID: 9876885 DOI: 10.1046/j.1468-2982.1998.1809618.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Migraine, particularly migraine with aura (MA), may be a risk factor for ischemic stroke (IS). The reasons for this association are unknown. We investigated the presence of genetic abnormalities of the protein C system in 83 MA patients, 31 IS patients, and 124 healthy controls, all aged under 45 years. We found an increased frequency of activated protein C resistance due to Arg506Gln factor V mutation, and of protein S deficiency in both disorders, with figures higher than those reported in the general population and significantly different from those found in controls. These prothrombotic genetic abnormalities may be shared risk factors in IS and MA, and may play a role in increasing the risk of cerebrovascular disease in migraineurs.
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Affiliation(s)
- D D'Amico
- Headache Center, Neurological Institute C. Besta, Milan, Italy
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45
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Leone M, Attanasio A, Croci D, Ferraris A, D'Amico D, Grazzi L, Nespolo A, Bussone G. 5-HT1A receptor hypersensitivity in migraine is suggested by the m-chlorophenylpiperazine test. Neuroreport 1998; 9:2605-8. [PMID: 9721941 DOI: 10.1097/00001756-199808030-00033] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Involvement of the cerebral serotoninergic system has been invoked to explain the origin of the pain and the vascular phenomena in migraine. To further investigate the type of cerebral serotonin receptors that may be altered in migraine, the prolactin (PRL) and cortisol responses to m-chlorophenylpiperazine (mCPP), a selective 5-HT1A,-5-HT(2A/C) receptor agonist, were monitored in 12 patients suffering from migraine without aura and in 14 matched healthy controls. Each subject underwent two challenges, one with mCPP (0.5 mg/kg) and the other with placebo (orally) using a double-blind crossover design. Anxiety level was measured by the State Trait Anxiety Inventory. Migraine patients had a greater PRL response to mCPP (p = 0.05) and greater anxiety (p < 0.01) than controls; cortisol response to mCPP did not differ suggesting that 5-HT2C receptors are normal in migraine. Augmented PRL response to mCPP could derive from 5-HT1A receptor hypersensitivity, perhaps as as a consequence of anxiety due to pain expectation. Cerebral 5-HT1A hypersensitivity could also explain the increased occurrence of migraine attacks during anxiety.
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Affiliation(s)
- M Leone
- Istituto Neurologico C. Besta, Milan, Italy
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46
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Li Pira G, Oppezzi L, Seri M, Westby M, Caroli F, Fenoglio D, Lancia F, Ferraris A, Bottone L, Valle MT, Kunkl A, Romeo G, Dalgleish AG, Manca F. Repertoire breadth of human CD4+ T cells specific for HIV gp120 and p66 (primary antigens) or for PPD and tetanus toxoid (secondary antigens). Hum Immunol 1998; 59:137-48. [PMID: 9548073 DOI: 10.1016/s0198-8859(98)00004-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Antigen derived peptides bound on MHC class II molecules on presenting cells stimulate specific CD4 lymphocytes that are in a naive state if antigen is given for the first time, or in a memory state if antigen has been previously encountered. In order to compare clonal heterogeneity of the human CD4+ T helper repertoire in primary vs. recall responses, we have generated T cell lines in vitro by repeated stimulation of peripheral lymphocytes with primary or with recall antigens. Clonal heterogeneity was broad in the case of recall response to tetanus toxoid or PPD, with a high frequency of specific precursors (> 100 cells/10(6) lymphocytes). In contrast, T cell lines responsive to primary antigens (HIV gp120 or HIV p66) were oligoclonal as defined by TCR V beta gene usage and by spectratyping, and the precursor frequency was low (< 2 cells/10(6) lymphocytes). Primary T cell lines generated from blood samples drawn at different times from the same donor showed that clones with identical TCR CDR3 region coding sequences were expanded, suggesting that in these individuals a large progeny derived from one single precursor is present, even though a previous encounter with the antigen was not documented. Assuming an even in vivo distribution of such cells, the presence of one precursor every 10(6) CD4 lymphocytes (within the CD4 T repertoire that comprises roughly 10(11) CD4 T cells) indicates that approximately 10(5) identical T cells from the same clonal precursor account for the primary response against the model antigens we have studied.
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Affiliation(s)
- G Li Pira
- Department of Immunology, University of Genoa, San Martino Hospital, Italy
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47
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De Maria A, Ferraris A, Guastella M, Pilia S, Cantoni C, Polero L, Mingari MC, Bassetti D, Fauci AS, Moretta L. Expression of HLA class I-specific inhibitory natural killer cell receptors in HIV-specific cytolytic T lymphocytes: impairment of specific cytolytic functions. Proc Natl Acad Sci U S A 1997; 94:10285-8. [PMID: 9294202 PMCID: PMC23354 DOI: 10.1073/pnas.94.19.10285] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Human T lymphocytes have been shown to express inhibitory natural killer cell receptors (NKR), which can down-regulate T cell antigen receptor-mediated T cell function, including cytolytic activity. In the present study, we demonstrate that CD3+NKR+ cells can be identified in HIV-infected patients. HIV-specific cytolytic activity was analyzed in five patients in whom autologous lymphoblastoid B cell lines could be derived as a source of autologous target cells. Phytohemagglutinin-activated T cell populations that had been cultured in interleukin 2 displayed HIV-specific cytotoxic T lymphocyte (CTL) activity against HIV env, gag, pol, and nef in 3 of 5 patients. Addition of anti-NKR mAb of IgM isotype could increase the specific CTL activity. Moreover, in one additional patient, HIV-specific CTL activity was undetectable; however, after addition of anti-NKR mAb such CTL activity appeared de novo. Similar results were obtained by analysis of CD3+NKR+ clones derived from two patients. These data provide direct evidence that CD3+NKR+ cells may include antigen (HIV)-specific CTLs and that mAb-mediated masking of inhibitory NKR may revert the down-regulation of CTL function.
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Affiliation(s)
- A De Maria
- Clinica delle Malattie Infettive I, Università degli Studi di Genova, 16132, Italy
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48
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Li Pira G, Westby M, Oppezzi L, Ferraris A, Lancia F, Piatti G, Fenoglio D, Saverino D, Arp J, Dekaban G, Dalgleish A, Manca F. Human T leukaemia virus type 1 (HTLV-1) specific T-helper cell response: clonal fluctuations and repertoire heterogeneity. Br J Haematol 1996; 93:287-94. [PMID: 8639418 DOI: 10.1046/j.1365-2141.1996.4921030.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The naive T-helper (Th) repertoire specific for HTLV-1 envelope (env) has been examined on antigen specific T-cell lines and clones from non-immune individuals. Clonal heterogeneity was determined by analysing the T-cell receptor (TCR) Vbeta gene usage and by sequencing the hypervariable regions of the TCR genes. Fluctuations in the V beta gene usage were determined by comparing the TCR Vbeta gene profiles of T-cell lines at different times. We found that a diverse repertoire for HTLV-1 env could be triggered in vitro. Diverse Vbeta genes were used by the same line tested at different times, suggesting that clonal composition of an antigen-specific T-cell line is not constant in vitro. Clones in fact may be up- and down-regulated and clonotypes undetectable at one time point can emerge upon subsequent restimulation. Therefore evaluation of the clonal composition of a T-cell line gives a snapshot of the dominant clones at the time of analysis, and does not tell the whole picture of the antigen-specific ensemble. Furthermore, by sequencing the TCR genes, we identified clones with identical Vbeta gene usage which differed in hypervariable regions (CDR3), indicating their derivation from independent precursors and contributing to overall clonal heterogeneity. If these data can be extended to HTLV-1-infected patients studied in vivo, the Th cell repertoire specific for HTLV-1 env may prove very heterogenous, with important implications for vaccine development.
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Affiliation(s)
- G Li Pira
- Department of Immunology, San Martino Hospital, University of Genoa, Italy
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49
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Fenoglio D, Li Pira G, Saverino D, Ferraris A, Lancia F, Megiovanni A, Oppezzi L, Piatti G, Buffa F, Valle MT, Kunkl A, Manca F. Handling of retroviral antigens by human antigen-presenting cells. Res Virol 1996; 147:97-101. [PMID: 8901427 DOI: 10.1016/0923-2516(96)80222-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Antigen-specific T helper cells play an important role in retroviral infections. Indeed, they provide help for B-cell activation and antibody production and for clonal expansion of cytolytic lymphocytes. Therefore, we used retrovirus-specific human T helper clones in order to define modes of antigen presentation, antigen-presenting cells and the molecular context of Th epitopes that could be exploited in the design of immunogens aimed at optimizing the Th cell response. In particular, we describe several mechanisms of receptor-mediated antigen uptake that enhance the stimulation of human T-cell clones specific for HIV and HTLV-1 antigens; we report on the differential recognition of Th epitopes depending on the molecular-viral context; we show that dendritic cells are the most efficient presenting cells and are essential for the induction of in vitro primary Th cell responses; and finally, we propose that Th cells specific for internal, conserved antigens of HIV such as reverse transcriptase, may be candidates for intrastructural help resulting in induction of envelope specific antibodies.
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Affiliation(s)
- D Fenoglio
- Department of Immunology, University of Genoa, Italy
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50
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Manca F, Fenoglio D, Valle MT, Li Pira G, Kunkl A, Ferraris A, Saverino D, Lancia F, Mortara L, Lozzi L. Human CD4+ T cells can discriminate the molecular and structural context of T epitopes of HIV gp120 and HIV p66. J Acquir Immune Defic Syndr Hum Retrovirol 1995; 9:227-237. [PMID: 7540488] [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: 05/21/2023]
Abstract
CD4+ T cell lines and clones specific for human immunodeficiency virus (HIV) antigens have been generated from peripheral lymphocytes of naive individuals by priming with the envelope protein gp120, the enzyme reverse transcriptase (p66), and their synthetic peptides. T cells were tested for proliferation to proteins, to peptides, and to HIV virions. Different patterns of reaction were identified. T cells primed in vitro with the whole antigen responded to the protein, but recognition of overlapping peptides occurred with a fraction of the lines or clones. The virus was recognized by some, but not all, of the gp120- and p66-specific T cells, with an efficiency 2 logs higher than the recombinant soluble proteins on a molar basis. One T cell line specific for gp120 responded to virions presented by B cells, but not by monocytes. In contrast, T cells induced with peptides did not always respond to the proteins. Generation of T cell lines from naive individuals may be an in vitro model for T cell immunization, and the response patterns may have implications for the design of vaccines aimed at inducing a T helper response. In fact our in vitro data suggest that (a) immunization with peptides does not always induce T cells recognizing the whole protein, (b) immunization with proteins does not always induce T cells recognizing the protein in the context of the HIV virus, and (c) recognition of gp120 in the context of HIV may be dictated by the type of presenting cells.
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Affiliation(s)
- F Manca
- Department of Immunology, San Martino Hospital, University of Genoa, Italy
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