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Iorizzo M, Sirtoli Marcondes MT, Sechi A, Therianou A, Piraccini BM, Starace M. Female diffuse non-cicatricial alopecia-The diagnostic value of trichoscopy. J Eur Acad Dermatol Venereol 2024; 38:e142-e144. [PMID: 37702248 DOI: 10.1111/jdv.19493] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 08/30/2023] [Indexed: 09/14/2023]
Affiliation(s)
- M Iorizzo
- Private Dermatology Practice, Lugano/Bellinzona, Switzerland
| | | | - A Sechi
- Dermatology Unit, San Bortolo Hospital, Vicenza, Italy
| | - A Therianou
- Imperial College, NHS Healthcare Trust, London, UK
| | - B M Piraccini
- Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Policlinico S. Orsola-Malpighi, Bologna, Italy
- Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - M Starace
- Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Policlinico S. Orsola-Malpighi, Bologna, Italy
- Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy
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2
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Bortoluzzi P, Prigitano A, Sechi A, Boneschi V, Germiniasi F, Esposto MC, Romanò L, Pavan G, Matinato C, Veraldi S, Marzano AV, Grancini A. Report of terbinafine resistant Trichophyton spp. in Italy: Clinical presentations, molecular identification, antifungal susceptibility testing and mutations in the squalene epoxidase gene. Mycoses 2023. [PMID: 37139949 DOI: 10.1111/myc.13597] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 04/21/2023] [Indexed: 05/05/2023]
Abstract
BACKGROUND Numerous reports of resistance to terbinafine in Trichophyton spp. from all over the world are arousing justified attention and concern. Point mutations in the gene that encodes the squalene epoxidase (SQLE) enzyme are responsible for these therapeutic resistances. OBJECTIVES Primary objective of the study was to describe first isolates of Trichophyton spp. resistant to terbinafine among the patients treated between September 2019 and June 2022 at the Dermatology Units of Ospedale Maggiore Policlinico and San Bortolo Hospital. Secondary objective was to study the resistance mechanism. METHODS Patients with confirmed Trichophyton spp. infection has been treated with systemic and topical terbinafine. Patients were then re-evaluated 12 weeks after the therapy. Patients with incomplete or absent response to terbinafine underwent a new skin scraping for direct mycological examination, new identification of dermatophyte species from culture and MALDI-TOF, molecular species identification, antifungal susceptibility testing and molecular analysis of SQLE gene. RESULTS We identified five patients without clinical response to treatment with terbinafine. The DNA sequencing of the ITS region identified one Trichophyton rubrum and four Trichophyton indotineae. The T. rubrum strain showed minimum inhibitory concentration (MIC) (90% growth inhibition) of 4 mg/L for terbinafine. The four T. indotineae strains showed a MICs range of 0.25-4 mg/L for terbinafine. The analysis of the SQLE gene in the T. rubrum strain showed a nucleotide substitution generating a missense mutation (L393F). The SQLE gene sequencing in the T. indotineae strains showed a nucleotide substitution generating a missense mutation (F397L) in two strains, a nucleotide substitution L393S in one strain and a nucleotide substitution F415C in another strain. CONCLUSIONS We report the first cases of terbinafine-resistant Trichophyton isolates in the Italian population. Solid antifungal management programs will be needed to promote more responsible use of antimycotics and preserve their therapeutic efficacy to control antifungal resistance.
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Affiliation(s)
- P Bortoluzzi
- Dermatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - A Prigitano
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Milan, Italy
| | - A Sechi
- Dermatology Unit, San Bortolo Hospital, Vicenza, Italy
| | - V Boneschi
- Dermatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - F Germiniasi
- Dermatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - M C Esposto
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Milan, Italy
| | - L Romanò
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Milan, Italy
| | - G Pavan
- Department of Microbiology, San Bortolo Hospital, Vicenza, Italy
| | - C Matinato
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Milan, Italy
| | - S Veraldi
- Dermatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Milan, Italy
- Dermatology Unit, San Bortolo Hospital, Vicenza, Italy
- Department of Microbiology, San Bortolo Hospital, Vicenza, Italy
- Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy
| | - A V Marzano
- Dermatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Milan, Italy
- Dermatology Unit, San Bortolo Hospital, Vicenza, Italy
- Department of Microbiology, San Bortolo Hospital, Vicenza, Italy
- Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy
| | - A Grancini
- Laboratorio Analisi - Laboratorio di Batteriologia, Parassitologia e Micologia, Fondazione IRCCS O. Maggiore Policlinico, Milan, Italy
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3
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Sechi A, Song J, Dell'Antonia M, Heidemeyer K, Piraccini BM, Starace M, Naldi L. Adverse events in patients treated with Jak-inhibitors for alopecia areata: a systematic review. J Eur Acad Dermatol Venereol 2023. [PMID: 37013725 DOI: 10.1111/jdv.19090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 03/21/2023] [Indexed: 04/05/2023]
Abstract
Recently, the impressive efficacy of JAK-inhibitors (JAK-I) in alopecia areata (AA) has been described in several studies; however, to date, there is limited information on the safety of JAK-I in AA patients. For this reason, on the August 18th 2022, a systematic review was performed to collect the pre-marketing and post-marketing data on the safety of JAK-I in patients treated for AA, evaluating for each molecule the reported adverse events (AEs) in indexed literature and their frequency. The keywords "alopecia areata" AND "Jak-inhibitors OR Janus-kinase Inhibitors" were searched on PubMed, Embase, and Cochrane databases. Of 407 studies retrieved, 28 papers met the requirements and were used in our review, including 5 RCTs and 23 case series, overall 1719 patients were included and the safety of 6 JAK-I was assessed (baricitinib, brepocitinib, deuruxolitinib, ritlecitinib, ruxolitinib, tofacitinib). Systemic JAK-I were well tolerated, most of the AEs were mild, and the withdrawal rate for AEs was very low and inferior to placebo in controlled studies (1.6% vs. 2.2%). Laboratory abnormalities represented 40.1% of AEs associated with oral JAK-I, which mostly included the rise in cholesterol, transaminase, triglycerides, creatine phosphokinase (CPK), and sporadic cases of neutro/lymphocytopenia. The remaining AEs involved the respiratory tract (20.8%), the skin (17.2%), the urogenital (3.8%), or the gastroenterological (3.4%) tract. Increased rates of infections involved not only the upper (19.0%) and lower (0.3%) respiratory tract, but also the urogenital system (3.6%), and the skin (4.6%). Isolated cases of grade 3 to 4 AEs have been reported, including myocardial infarction, hypertensive urgencies, cellulitis, rhabdomyolysis, neutropenia, and high elevation of creatinine kinase. No fatal outcomes were reported. AEs reported with topical formulation included scalp irritation and folliculitis. The main limit of this review is the lack of data related to post-marketing surveillance, which should be maintained on a long-term basis.
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Affiliation(s)
- A Sechi
- San Bortolo Hospital of Vicenza, Dermatology Unit Vicenza, Veneto, Italy
- IRCCS Azienda Ospedaliero-Universitaria di Bologna Policlinico S'Orsola, Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine
| | - J Song
- San Bortolo Hospital of Vicenza, Dermatology Unit Vicenza, Veneto, Italy
- University of Padua Faculty of Medicine and Surgery, Department of Medicine DIMED, Padova, Veneto, Italy
| | - M Dell'Antonia
- University of Cagliari, Dermatology Clinic, Department of Medical Sciences and Public Health
| | - K Heidemeyer
- San Bortolo Hospital of Vicenza, Dermatology Unit Vicenza, Veneto, Italy
- Bern University Hospital Clinic for Dermatology, Department of Dermatology, Inselspital, Bern, Switzerland
| | - B M Piraccini
- IRCCS Azienda Ospedaliero-Universitaria di Bologna Policlinico S'Orsola, Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine
| | - M Starace
- IRCCS Azienda Ospedaliero-Universitaria di Bologna Policlinico S'Orsola, Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine
| | - L Naldi
- San Bortolo Hospital of Vicenza, Dermatology Unit Vicenza, Veneto, Italy
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Starace M, Viviani F, Carpanese MA, Alessandrini A, Sechi A, Patrizi A, Bianchi T. Diagnosis and Management of Intravenous Drug Users' Chronic Wounds: A Case Series Collection of a Single Center. INT J LOW EXTR WOUND 2022:15347346221121465. [PMID: 36036366 DOI: 10.1177/15347346221121465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background: Intravenous drug users (IVDUs) represent a very small group of patients affected by chronic wounds (CWs). Objectives: To assess the risk factors for CWs in IVDUs, to improve their treatment. Methods: A retrospective review of 7 IVDUs with CWs was performed at the Dermatology of the University of Bologna. Results: A history of 10 years of the most frequent injection was heroin in the gaiter area. The most observed comorbidities were HIV, HCV and HBV. They were treated most with an alginate with silver dressing with an average follow-up of 2.8 years. Conclusions: We would like to highlight the importance of clinical history in this type of patients and that in our experience specialized skin wounds risk assessment and management could be useful, aside from traditional compression therapy.
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Affiliation(s)
- M Starace
- Dermatology, IRCCS Policlinico di Sant'Orsola, Bologna, Italia
- Dermatology, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), 18508University of Bologna, Bologna, Italy
| | - F Viviani
- Dermatology, IRCCS Policlinico di Sant'Orsola, Bologna, Italia
- Dermatology, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), 18508University of Bologna, Bologna, Italy
| | - M A Carpanese
- Dermatology, IRCCS Policlinico di Sant'Orsola, Bologna, Italia
- Dermatology, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), 18508University of Bologna, Bologna, Italy
| | - A Alessandrini
- Dermatology, IRCCS Policlinico di Sant'Orsola, Bologna, Italia
- Dermatology, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), 18508University of Bologna, Bologna, Italy
| | - A Sechi
- 198202UOC Dermatologia - Ospedale San Bortolo, Vicenza, Italy
| | - A Patrizi
- Dermatology, IRCCS Policlinico di Sant'Orsola, Bologna, Italia
- Dermatology, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), 18508University of Bologna, Bologna, Italy
| | - T Bianchi
- Dermatology, IRCCS Policlinico di Sant'Orsola, Bologna, Italia
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5
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Sechi A, Pierobon E, Pezzolo E, Germi L, Trevisan G, Zardo D, Riva G, Mondino S, Naldi L. Abrupt onset of Sweet syndrome, pityriasis rubra pilaris, pityriasis lichenoides et varioliformis acuta and erythema multiforme: unravelling a possible common trigger, the COVID-19 vaccine. Clin Exp Dermatol 2022; 47:437-440. [PMID: 34617317 PMCID: PMC8652785 DOI: 10.1111/ced.14970] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2021] [Indexed: 12/25/2022]
Affiliation(s)
- A. Sechi
- Dermatology UnitOspedale San BortoloVicenzaItaly
- IRCCS University Hospital of Bologna S Orsola‐Malpighi Polyclinic Dermatology DivisionDepartment of Experimental, Diagnostic and Specialty Medicine (DIMES)Alma Mater Studiorum University of BolognaBolognaItaly
| | - E. Pierobon
- Section of DermatologyDepartment of Medicine and SurgeryUniversity of ParmaParmaItaly
| | - E. Pezzolo
- Dermatology UnitOspedale San BortoloVicenzaItaly
| | - L. Germi
- Dermatology UnitOspedale San BortoloVicenzaItaly
| | - G. Trevisan
- Dermatology UnitOspedale San BortoloVicenzaItaly
| | - D. Zardo
- Pathology UnitOspedale San BortoloVicenzaItaly
| | - G. Riva
- Pathology UnitOspedale San BortoloVicenzaItaly
| | - S. Mondino
- Health and Risk ManagementOspedale San BortoloVicenzaItaly
| | - L. Naldi
- Dermatology UnitOspedale San BortoloVicenzaItaly
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6
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Guglielmo A, Virdi A, Vincenzi C, Zanotti Russo M, Sechi A, Patrizi A, Neri I. 'Colouring' wipes phenomenon: a peculiar skin pigmentation induced by ascorbic acid observed during lockdown. Clin Exp Dermatol 2021; 46:1075-1078. [PMID: 33577095 PMCID: PMC9213943 DOI: 10.1111/ced.14606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 02/06/2021] [Accepted: 02/10/2021] [Indexed: 11/30/2022]
Abstract
During the SARS‐CoV‐2 (COVID‐19) pandemic, an unusual outbreak of yellow–brown pigmentation on the skin of children was reported. Because of the restrictions on movement promulgated during the lockdown, most consultancies were performed using teledermatology. Data concerning personal care products and application of topical substances were collected, which revealed use of the same brand of wipes for all patients. A liquid chromatography–mass spectrometry analysis was performed to compare the components of the wipes before and after the observation of the pigmentation, in order to detect the responsible substance. This analysis revealed a level about 10‐fold higher than normal of ascorbic acid and its oxidation products (dehydroascorbic acid and L‐threonic acid) in the wipes associated with the pigmentation. These ‘colouring wipes’ represent a peculiar but harmless phenomenon that highlights the importance of careful questioning about personal care products used by patients.
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Affiliation(s)
- A Guglielmo
- Department of Dermatology, IRCCS Policlinico di Sant'Orsola, Bologna, Italy.,Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - A Virdi
- Department of Dermatology, IRCCS Policlinico di Sant'Orsola, Bologna, Italy.,Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - C Vincenzi
- Department of Dermatology, IRCCS Policlinico di Sant'Orsola, Bologna, Italy.,Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | | | - A Sechi
- Department of Dermatology, IRCCS Policlinico di Sant'Orsola, Bologna, Italy.,Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - A Patrizi
- Department of Dermatology, IRCCS Policlinico di Sant'Orsola, Bologna, Italy.,Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - I Neri
- Department of Dermatology, IRCCS Policlinico di Sant'Orsola, Bologna, Italy.,Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, Italy
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7
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Chessa MA, Filippi F, Patrizi A, Vollono L, Sechi A, D'Ercole M, Leuzzi M, Virdi A, Neri I. Aplasia cutis: clinical, dermoscopic findings and management in 45 children. J Eur Acad Dermatol Venereol 2020; 34:e724-e726. [PMID: 32346876 DOI: 10.1111/jdv.16542] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- M A Chessa
- Dermatology Unit, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - F Filippi
- Dermatology Unit, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - A Patrizi
- Dermatology Unit, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - L Vollono
- Dermatology Unit, Department of "Medicina dei Sistemi", University of Rome Tor Vergata, Rome, Italy
| | - A Sechi
- Dermatology Unit, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - M D'Ercole
- Dermatology Unit, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - M Leuzzi
- Dermatology Unit, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - A Virdi
- Dermatology Unit, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - I Neri
- Dermatology Unit, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
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8
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Offidani A, Molinelli E, Sechi A, Brisigotti V, Campanati A, Raone B, Neri I, Patrizi A. Hidradenitis suppurativa in a prepubertal case series: a call for specific guidelines. J Eur Acad Dermatol Venereol 2019; 33 Suppl 6:28-31. [DOI: 10.1111/jdv.15827] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 06/13/2019] [Indexed: 11/30/2022]
Affiliation(s)
- A. Offidani
- Dermatological Unit Department of Clinical and Molecular Sciences Polytechnic Marche University Ancona Italy
| | - E. Molinelli
- Dermatological Unit Department of Clinical and Molecular Sciences Polytechnic Marche University Ancona Italy
| | - A. Sechi
- Department of Experimental, Diagnostic and Specialty Medicine Division of Dermatology University of Bologna Bologna Italy
| | - V. Brisigotti
- Dermatological Unit Department of Clinical and Molecular Sciences Polytechnic Marche University Ancona Italy
| | - A. Campanati
- Dermatological Unit Department of Clinical and Molecular Sciences Polytechnic Marche University Ancona Italy
| | - B. Raone
- Department of Experimental, Diagnostic and Specialty Medicine Division of Dermatology University of Bologna Bologna Italy
| | - I. Neri
- Department of Experimental, Diagnostic and Specialty Medicine Division of Dermatology University of Bologna Bologna Italy
| | - A. Patrizi
- Department of Experimental, Diagnostic and Specialty Medicine Division of Dermatology University of Bologna Bologna Italy
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9
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Neri I, Savoia F, Tengattini V, Sechi A, Rucci P, Patrizi A. Terra firma‐forme dermatosis is underestimated in children and is associated with atopic dermatitis. J Eur Acad Dermatol Venereol 2018; 32:e421-e422. [DOI: 10.1111/jdv.15009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- I. Neri
- Dermatology Unit Department of Specialized, Diagnostic and Experimental Medicine University of Bologna Bologna Italy
| | - F. Savoia
- Dermatology Unit Department of Specialized, Diagnostic and Experimental Medicine University of Bologna Bologna Italy
| | - V. Tengattini
- Dermatology Unit Department of Specialized, Diagnostic and Experimental Medicine University of Bologna Bologna Italy
| | - A. Sechi
- Dermatology Unit Department of Specialized, Diagnostic and Experimental Medicine University of Bologna Bologna Italy
| | - P. Rucci
- Department of Biomedical and Neuromotor Sciences Division of Hygiene and Biostatistics University of Bologna Bologna Italy
| | - A. Patrizi
- Dermatology Unit Department of Specialized, Diagnostic and Experimental Medicine University of Bologna Bologna Italy
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10
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Chessa M, Patrizi A, Sechi A, Virdi A, Leuzzi M, Neri I. Pigmented fungiform lingual papillae: dermoscopic and clinical features. J Eur Acad Dermatol Venereol 2018; 32:935-939. [DOI: 10.1111/jdv.14809] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 01/10/2018] [Indexed: 02/06/2023]
Affiliation(s)
- M.A. Chessa
- Dermatology; Department of Experimental, Diagnostic and Specialty Medicine; University of Bologna; Bologna Italy
| | - A. Patrizi
- Dermatology; Department of Experimental, Diagnostic and Specialty Medicine; University of Bologna; Bologna Italy
| | - A. Sechi
- Dermatology; Department of Experimental, Diagnostic and Specialty Medicine; University of Bologna; Bologna Italy
| | - A. Virdi
- Dermatology; Department of Experimental, Diagnostic and Specialty Medicine; University of Bologna; Bologna Italy
| | - M. Leuzzi
- Dermatology; Department of Experimental, Diagnostic and Specialty Medicine; University of Bologna; Bologna Italy
| | - I. Neri
- Dermatology; Department of Experimental, Diagnostic and Specialty Medicine; University of Bologna; Bologna Italy
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Doecke JD, Hartnell F, Bampton P, Bell S, Mahy G, Grover Z, Lewindon P, Jones LV, Sewell K, Krishnaprasad K, Prosser R, Marr D, Fischer J, R Thomas G, Tehan JV, Ding NS, Cooke SE, Moss K, Sechi A, De Cruz P, Grafton R, Connor SJ, Lawrance IC, Gearry RB, Andrews JM, Radford-Smith GL. Infliximab vs. adalimumab in Crohn's disease: results from 327 patients in an Australian and New Zealand observational cohort study. Aliment Pharmacol Ther 2017; 45:542-552. [PMID: 27995633 DOI: 10.1111/apt.13880] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 06/19/2016] [Accepted: 11/06/2016] [Indexed: 12/14/2022]
Abstract
BACKGROUND Maintenance anti-tumour necrosis factor-α (anti-TNFα) treatment for Crohn's disease is the standard of care for patients with an inadequate response to corticosteroids and immunomodulators. AIM To compare the efficacy and safety of infliximab and adalimumab in clinical practice and assess the value of concomitant immunomodulator therapy. METHODS We performed an observational cohort study in consecutive patients with Crohn's disease qualifying for anti-TNFα treatment in Australia and New Zealand between 2007 and 2011. Demographic and clinical data were prospectively recorded to identify independent factors associated with induction and maintenance of response to infliximab or adalimumab, or to either anti-TNFα therapy. RESULTS Three hundred and twenty-seven patients (183 infliximab, 144 adalimumab) successfully applied for treatment. Eighty-nine percent responded in all groups and median maintenance of response was similar for the two agents. Concomitant immunomodulator with infliximab, but not adalimumab, demonstrated a significantly longer response overall (P = 0.002), and significantly fewer disease and treatment-related complications (P = 0.017). Corticosteroids at baseline, and/or in the preceding 12 months, were associated with a 9-13 times greater risk of disease flare during maintenance treatment as compared to no corticosteroids (P < 0.0001). Maintenance of response was similar in the anti-TNF naïve and anti-TNF experienced subgroups. CONCLUSIONS In this large, real-life study, we demonstrate infliximab and adalimumab to have similar response characteristics. However, infliximab requires concomitant immunomodulator to achieve optimal maintenance of response comparable to adalimumab monotherapy. The results of this study will assist clinicians in further optimising patient care in their day-to-day clinical practice.
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Affiliation(s)
- J D Doecke
- Parkville, Vic., Australia.,Brisbane, Qld, Australia
| | | | | | - S Bell
- Melbourne, Vic., Australia
| | - G Mahy
- Townsville, Qld, Australia
| | | | | | | | | | | | | | | | | | | | | | | | | | - K Moss
- Bedford Park, SA, Australia
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Costello SP, Ghaly S, Beswick L, Pudipeddi A, Agarwal A, Sechi A, O'Connor S, Connor SJ, Sparrow MP, Bampton P, Walsh AJ, Andrews JM. Compassionate access anti-tumour necrosis factor-α therapy for ulcerative colitis in Australia: the benefits to patients. Intern Med J 2016; 45:659-66. [PMID: 25732268 DOI: 10.1111/imj.12732] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 02/25/2015] [Indexed: 12/20/2022]
Abstract
BACKGROUND The efficacy of infliximab has been demonstrated in patients with both acute severe and moderate-severe ulcerative colitis (UC). However, there is a need for 'real-life data' to ensure that conclusions from trial settings are applicable in usual care. We therefore examined the national experience of anti-tumour necrosis factor-α (TNF-α) therapy in UC. METHODS Case notes review of patients with UC who had received compassionate access (CA) anti-TNF-α therapy from prospectively maintained inflammatory bowel disease databases of six Australian adult teaching hospitals. RESULTS Patients either received drug for acute severe UC (ASUC) failing steroids (n = 29) or for medically refractory UC (MRUC) (n = 35). In ASUC, the treating physicians judged that anti-TNF-α therapy was successful in 20/29 patients (69%); in these cases, anti-TNF-α was able to be discontinued (after 1-3 infusions in 19/20 responders) as clinical remission was achieved. Consistent with this perceived benefit, only 7/29 (24%) subsequently underwent colectomy during a median follow up of 12 months (interquartile range (IQR) 5-16). Eight of the 35 patients with MRUC (23%) required colectomy during a median follow up of 28 months (IQR 11-43). The majority of these patients (20/35 or 57%) had anti-TNF-α therapy for ≥4 months, whereas, 27/29 (93%) of ASUC patients had CA for ≤3 months. CONCLUSIONS These data show an excellent overall benefit for anti-TNF-α therapy in both ASUC and MRUC. In particular, only short-duration anti-TNF-α was required in ASUC. These real-life data thus support the clinical trial data and should lead to broader use of this therapy in UC.
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Affiliation(s)
- S P Costello
- Inflammatory Bowel Disease Service, Department of Gastroenterology and School of Medicine, University of Adelaide at Royal Adelaide Hospital, Adelaide, South Australia, Australia
| | - S Ghaly
- Department of Gastroenterology, St Vincent's Hospital, Sydney, New South Wales, Australia
| | - L Beswick
- Department of Gastroenterology, The Alfred Hospital, Melbourne, Victoria, Australia
| | - A Pudipeddi
- Department of Gastroenterology, St Vincent's Hospital, Sydney, New South Wales, Australia
| | - A Agarwal
- Inflammatory Bowel Disease Service, Department of Gastroenterology and School of Medicine, University of Adelaide at Royal Adelaide Hospital, Adelaide, South Australia, Australia
| | - A Sechi
- Department of Gastroenterology, Liverpool Hospital, Sydney, New South Wales, Australia
| | - S O'Connor
- Department of Gastroenterology, Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - S J Connor
- Department of Gastroenterology, Liverpool Hospital, Sydney, New South Wales, Australia
| | - M P Sparrow
- Department of Gastroenterology, The Alfred Hospital, Melbourne, Victoria, Australia
| | - P Bampton
- Department of Gastroenterology, Flinders Medical Centre, Adelaide, South Australia, Australia
| | - A J Walsh
- Department of Gastroenterology, St Vincent's Hospital, Sydney, New South Wales, Australia
| | - J M Andrews
- Inflammatory Bowel Disease Service, Department of Gastroenterology and School of Medicine, University of Adelaide at Royal Adelaide Hospital, Adelaide, South Australia, Australia
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Andrews JM, Costello SP, Agarwal AK, Bampton P, Beswick L, Connor S, Ghaly S, O'Connor S, Pudipeddi A, Sechi A, Sparrow M, Walsh AJ. Conflict of interest: real and perceived - a more mature consideration is needed. Intern Med J 2016; 46:377-9. [DOI: 10.1111/imj.12989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 01/05/2016] [Indexed: 11/30/2022]
Affiliation(s)
- J. M. Andrews
- IBD Service, Department of Gastroenterology and Hepatology; Royal Adelaide Hospital; Adelaide South Australia Australia
| | - S. P. Costello
- IBD Service, Department of Gastroenterology and Hepatology; Royal Adelaide Hospital; Adelaide South Australia Australia
| | - A. K. Agarwal
- IBD Service, Department of Gastroenterology and Hepatology; Royal Adelaide Hospital; Adelaide South Australia Australia
| | - P. Bampton
- Department of Gastroenterology; Flinders Medical Centre; Adelaide South Australia Australia
| | - L. Beswick
- Department of Gastroenterology; Barwon Health; Geelong Victoria Australia
| | - S. Connor
- Department of Gastroenterology; Liverpool Hospital; Liverpool New South Wales Australia
| | - S. Ghaly
- Department of Gastroenterology; St Vincent's Hospital; Sydney New South Wales Australia
| | - S. O'Connor
- Department of Gastroenterology; Princess Alexandra Hospital; Brisbane Queensland Australia
| | - A. Pudipeddi
- Department of Gastroenterology; St Vincent's Hospital; Sydney New South Wales Australia
| | - A. Sechi
- IBD Service; Liverpool Hospital; Liverpool New South Wales Australia
| | - M. Sparrow
- Department of Gastroenterology; Alfred Hospital; Melbourne Victoria Australia
| | - A. J. Walsh
- Department of Gastroenterology; St Vincent's Hospital; Sydney New South Wales Australia
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14
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Sirrs S, Hollak C, Merkel M, Sechi A, Glamuzina E, Janssen MC, Lachmann R, Langendonk J, Scarpelli M, Ben Omran T, Mochel F, Tchan MC. The Frequencies of Different Inborn Errors of Metabolism in Adult Metabolic Centres: Report from the SSIEM Adult Metabolic Physicians Group. JIMD Rep 2015; 27:85-91. [PMID: 26450566 PMCID: PMC5580735 DOI: 10.1007/8904_2015_435] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Revised: 03/19/2015] [Accepted: 03/23/2015] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND There are few centres which specialise in the care of adults with inborn errors of metabolism (IEM). To anticipate facilities and staffing needed at these centres, it is of interest to know the distribution of the different disorders. METHODS A survey was distributed through the list-serve of the SSIEM Adult Metabolic Physicians group asking clinicians for number of patients with confirmed diagnoses, types of diagnoses and age at diagnosis. RESULTS Twenty-four adult centres responded to our survey with information on 6,692 patients. Of those 6,692 patients, 510 were excluded for diagnoses not within the IEM spectrum (e.g. bone dysplasias, hemochromatosis) or for age less than 16 years, leaving 6,182 patients for final analysis. The most common diseases followed by the adult centres were phenylketonuria (20.6%), mitochondrial disorders (14%) and lysosomal storage disorders (Fabry disease (8.8%), Gaucher disease (4.2%)). Amongst the disorders that can present with acute metabolic decompensation, the urea cycle disorders, specifically ornithine transcarbamylase deficiency, were most common (2.2%), followed by glycogen storage disease type I (1.5%) and maple syrup urine disease (1.1%). Patients were frequently diagnosed as adults, particularly those with mitochondrial disease and lysosomal storage disorders. CONCLUSIONS A wide spectrum of IEM are followed at adult centres. Specific knowledge of these disorders is needed to provide optimal care including up-to-date knowledge of treatments and ability to manage acute decompensation.
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Affiliation(s)
- S. Sirrs
- Vancouver General Hospital, Vancouver, BC Canada
| | - C. Hollak
- Amsterdam Medical Centre, Amsterdam, The Netherlands
| | - M. Merkel
- Asklepios Klinik St. Georg, Hamburg, Germany
| | - A. Sechi
- Azienda Ospedaliero-Universitaria S. Maria della Misericordia, Udine, Italy
| | - E. Glamuzina
- Starship Children’s Hospital, Auckland, New Zealand
| | | | - R. Lachmann
- National Hospital for Neurology and Neurosurgery, London, UK
| | | | | | | | - F. Mochel
- Hospitalier Pitié-Salpêtrière, Paris, France
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15
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Ghaly S, Costello S, Beswick L, Pudipeddi A, Agarwal A, Sechi A, Antoniades S, Headon B, Connor S, Lawrance IC, Sparrow M, Walsh AJ, Andrews JM. Dose tailoring of anti-tumour necrosis factor-alpha therapy delivers useful clinical efficacy in Crohn disease patients experiencing loss of response. Intern Med J 2015; 45:170-7. [DOI: 10.1111/imj.12621] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 10/02/2014] [Indexed: 12/22/2022]
Affiliation(s)
- S. Ghaly
- Department of Gastroenterology; St Vincent's Hospital; Sydney New South Wales Australia
- Centre for Inflammatory Bowel Disease; Fremantle Hospital; Fremantle Western Australia Australia
| | - S. Costello
- IBD Service; Department of Gastroenterology and Hepatology; School of Medicine; University of Adelaide at Royal Adelaide Hospital; Adelaide South Australia Australia
| | - L. Beswick
- Department of Gastroenterology; The Alfred Hospital; Melbourne Victoria Australia
| | - A. Pudipeddi
- Department of Gastroenterology; St Vincent's Hospital; Sydney New South Wales Australia
| | - A. Agarwal
- IBD Service; Department of Gastroenterology and Hepatology; School of Medicine; University of Adelaide at Royal Adelaide Hospital; Adelaide South Australia Australia
| | - A. Sechi
- Department of Gastroenterology; Liverpool Hospital; University of NSW; Sydney New South Wales Australia
| | - S. Antoniades
- Department of Gastroenterology; St Vincent's Hospital; Sydney New South Wales Australia
| | - B. Headon
- Department of Gastroenterology; The Alfred Hospital; Melbourne Victoria Australia
| | - S. Connor
- Department of Gastroenterology; Liverpool Hospital; University of NSW; Sydney New South Wales Australia
| | - I. C. Lawrance
- Centre for Inflammatory Bowel Disease; Fremantle Hospital; Fremantle Western Australia Australia
| | - M. Sparrow
- Department of Gastroenterology; The Alfred Hospital; Melbourne Victoria Australia
| | - A. J. Walsh
- Department of Gastroenterology; St Vincent's Hospital; Sydney New South Wales Australia
| | - J. M. Andrews
- IBD Service; Department of Gastroenterology and Hepatology; School of Medicine; University of Adelaide at Royal Adelaide Hospital; Adelaide South Australia Australia
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16
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Vollrath JT, Sechi A, Dreser A, Katona I, Wiemuth D, Vervoorts J, Dohmen M, Chandrasekar A, Prause J, Brauers E, Jesse CM, Weis J, Goswami A. Loss of function of the ALS protein SigR1 leads to ER pathology associated with defective autophagy and lipid raft disturbances. Cell Death Dis 2014; 5:e1290. [PMID: 24922074 PMCID: PMC4611717 DOI: 10.1038/cddis.2014.243] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 04/01/2014] [Accepted: 04/17/2014] [Indexed: 12/12/2022]
Abstract
Intracellular accumulations of altered, misfolded proteins in neuronal and other cells are pathological hallmarks shared by many neurodegenerative diseases including amyotrophic lateral sclerosis (ALS). Mutations in several genes give rise to familial forms of ALS. Mutations in Sigma receptor 1 have been found to cause a juvenile form of ALS and frontotemporal lobar degeneration (FTLD). We recently described altered localization, abnormal modification and loss of function of SigR1 in sporadic ALS. In order to further elucidate the molecular mechanisms underlying SigR1-mediated alterations in sporadic and familial ALS, we extended our previous studies using neuronal SigR1 knockdown cell lines. We found that loss of SigR1 leads to abnormal ER morphology, mitochondrial abnormalities and impaired autophagic degradation. Consistent with these results, we found that endosomal trafficking of EGFR is impaired upon SigR1 knockdown. Furthermore, in SigR1-deficient cells the transport of vesicular stomatitis virus glycoprotein is inhibited, leading to the accumulation of this cargo protein in the Golgi apparatus. Moreover, depletion of SigR1 destabilized lipid rafts and associated calcium mobilization, confirming the crucial role of SigR1 in lipid raft and intracellular calcium homeostasis. Taken together, our results support the notion that loss of SigR1 function contributes to ALS pathology by causing abnormal ER morphology, lipid raft destabilization and defective endolysosomal pathways.
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Affiliation(s)
- J T Vollrath
- Institute of Neuropathology, Uniklinik RWTH Aachen and JARA Brain Translational Medicine, Pauwelsstraße 30, Aachen 52074, Germany
| | - A Sechi
- Institute of Biomedical Engineering and Cell Biology, RWTH Aachen University and JARA Brain Translational Medicine, Pauwelsstraße 30, Aachen 52074, Germany
| | - A Dreser
- Institute of Neuropathology, Uniklinik RWTH Aachen and JARA Brain Translational Medicine, Pauwelsstraße 30, Aachen 52074, Germany
| | - I Katona
- Institute of Neuropathology, Uniklinik RWTH Aachen and JARA Brain Translational Medicine, Pauwelsstraße 30, Aachen 52074, Germany
| | - D Wiemuth
- Institute of Physiology, RWTH Aachen University, Pauwelsstraße 30, Aachen 52074, Germany
| | - J Vervoorts
- Institute of Biochemistry and Molecular Biology, RWTH Aachen University, Pauwelsstraße 30, Aachen 52074, Germany
| | - M Dohmen
- Institute of Biochemistry and Molecular Biology, RWTH Aachen University, Pauwelsstraße 30, Aachen 52074, Germany
| | - A Chandrasekar
- Institute of Neuropathology, Uniklinik RWTH Aachen and JARA Brain Translational Medicine, Pauwelsstraße 30, Aachen 52074, Germany
| | - J Prause
- Institute of Neuropathology, Uniklinik RWTH Aachen and JARA Brain Translational Medicine, Pauwelsstraße 30, Aachen 52074, Germany
| | - E Brauers
- Institute of Neuropathology, Uniklinik RWTH Aachen and JARA Brain Translational Medicine, Pauwelsstraße 30, Aachen 52074, Germany
| | - C M Jesse
- Institute of Neuropathology, Uniklinik RWTH Aachen and JARA Brain Translational Medicine, Pauwelsstraße 30, Aachen 52074, Germany
| | - J Weis
- Institute of Neuropathology, Uniklinik RWTH Aachen and JARA Brain Translational Medicine, Pauwelsstraße 30, Aachen 52074, Germany
| | - A Goswami
- Institute of Neuropathology, Uniklinik RWTH Aachen and JARA Brain Translational Medicine, Pauwelsstraße 30, Aachen 52074, Germany
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17
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Tolu G, Botti S, Garau R, Prota VA, Sechi A, Prota U, Bertaccini A. Identification of a 16SrII-E Phytoplasma in Calendula arvensis, Solanum nigrum, and Chenopodium spp. Plant Dis 2006; 90:325-330. [PMID: 30786557 DOI: 10.1094/pd-90-0325] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Epidemiological surveys were performed in Northern Sardinia (Italy) in a 10-year-old vineyard affected by "Bois noir" disease. Samples collected between May and October 2003 from chlorotic and stunted weeds belonging to 14 different taxonomic groups were indexed molecularly for detection of phytoplasmas. Nested polymerase chain reaction (PCR) assays using primers specific for the phytoplasma 16SrDNA gene showed three of six Calendula arvensis, one of two Solanum nigrum, and one of seven Chenopodium spp. assayed positive. Restriction fragment length polymorphism analyses and sequencing of amplified 16SrDNA fragments identified a putative phytoplasma in the ribosomal subgroup 16SrII-E. Further characterization of the rps3 gene, coding a ribosomal protein, confirmed the identification. However, the weeds and leafhop-per species collected in the vineyard tested negative by PCR assays for the Stolbur phytoplasma, the causal agent of "Bois noir". This is the first report of a phytoplasma of the 16SrII-E subgroup infecting C. arvensis, S. nigrum, and Chenopodium spp.
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Affiliation(s)
- G Tolu
- Dipartimento di Protezione delle Piante-sezione di Patologia vegetale, Università degli Studi, via De Nicola 1, 07100 Sassari, Italy
| | - S Botti
- DiSTA, Patologia vegetale, Alma Mater Studiorum, Università di Bologna, viale Fanin, 42, 40127 Bologna, Italy
| | - R Garau
- Dipartimento di Protezione delle Piante-sezione di Patologia vegetale, Università degli Studi, via De Nicola 1, 07100 Sassari, Italy
| | - V A Prota
- Dipartimento di Protezione delle Piante-sezione di Patologia vegetale, Università degli Studi, via De Nicola 1, 07100 Sassari, Italy
| | - A Sechi
- Dipartimento di Protezione delle Piante-sezione di Patologia vegetale, Università degli Studi, via De Nicola 1, 07100 Sassari, Italy
| | - U Prota
- Dipartimento di Protezione delle Piante-sezione di Patologia vegetale, Università degli Studi, via De Nicola 1, 07100 Sassari, Italy
| | - A Bertaccini
- DiSTA, Patologia vegetale, Alma Mater Studiorum, Università di Bologna, viale Fanin, 42, 40127 Bologna, Italy
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Abstract
Cell motility entails the extension of cytoplasmic processes, termed lamellipodia and filopodia. Extension is driven by actin polymerisation at the tips of these processes via molecular complexes that remain to be characterised. We show here that a green fluorescent protein (GFP) fusion of the Wiskott-Aldrich syndrome protein family member Scar1/WAVE1 is specifically recruited to the tips of lamellipodia in living B16F1 melanoma cells. Scar1-GFP was recruited only to protruding lamellipodia and was absent from filopodia. The localisation of Scar was facilitated by the finding that the formerly described inhibition of lamellipodia formation by ectopical expression of Scar, could be overcome by the treatment of cells with aluminium fluoride. These findings show that Scar is strategically located at sites of actin polymerisation specifically engaged in the protrusion of lamellipodia.
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Affiliation(s)
- P Hahne
- Department of Cell Biology, Institute of Molecular Biology, Austrian Academy of Sciences, Salzburg, Austria
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19
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Choidas A, Jungbluth A, Sechi A, Murphy J, Ullrich A, Marriott G. The suitability and application of a GFP-actin fusion protein for long-term imaging of the organization and dynamics of the cytoskeleton in mammalian cells. Eur J Cell Biol 1998; 77:81-90. [PMID: 9840457 DOI: 10.1016/s0171-9335(98)80075-7] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.8] [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: 11/22/2022] Open
Abstract
The product of a GFP-actin gene fusion, permanently or transiently transfected in diverse mammalian cell lines, was shown to be a suitable, intrinsic probe of both the organization and dynamics of the actin cytoskeleton. In live Swiss 3T3 and NIH 3T3 cells, the fusion protein was found to accumulate in lamellipodia, filopodia, focal contacts and stress fibers. Furthermore, comparisons of fluorescence images of GFP-actin and Cy3.5-phalloidin, an independent marker of F-actin, in permeabilized cells showed a complete overlap of the two fluorescence signals. In GFP-actin-transfected Hela cells that had been infected with Listeria monocytogenes, the fluorescence of the fusion protein was shown to dynamically associate in the F-actin rich comet tail that formed behind a motile bacterium. In stable transfectants of PC12 cells, GFP-actin constituted on the average 5% of the total actin - these cells exhibited normal growth behavior and responded to treatment with nerve growth factor by extending neurite-like extensions, the filopodia-like tips of which were densely packed with filamentous GFP-actin. Finally, the photobleaching decay time of GFP-actin in live cells of 63 seconds was much longer than that of fluorescein-labeled actin conjugates and little or no damage to the cytoskeleton was found during the photobleaching of GFP-actin. Having shown the suitability of GFP-actin as a probe of the cytoskeleton, its fluorescence was used in long-term imaging studies aimed at documenting changes in the cytoskeleton of rat bladder NBT-II carcinoma cells during the 24-hour growth factor-mediated epithelia to mesenchyme transformation. The intrinsic fluorescent probe was also used to investigate the organization of the actin cytoskeleton and behavior of individual mesenchyme NBT-II cells slowly migrating through a colony of epithelia cells.
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Affiliation(s)
- A Choidas
- Department of Molecular Biology, Max Planck Institute for Biochemistry, Martinsried, Germany
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20
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Fiori PL, Rappelli P, Addis MF, Sechi A, Cappuccinelli P. Trichomonas vaginalis haemolysis: pH regulates a contact-independent mechanism based on pore-forming proteins. Microb Pathog 1996; 20:109-18. [PMID: 8722099 DOI: 10.1006/mpat.1996.0010] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [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: 02/01/2023]
Abstract
There is a controversy in literature about involvement of secreted factors in the pathogenetic mechanisms of Trichomonas vaginalis, described mostly as contact-dependent. We found that the protozoan, under triggering conditions, is able to release molecules that lead to lysis without direct contact between parasite and target cells as a prerequisite. In this paper we characterize contact-independent cytotoxicity using the red blood cell as a cellular model. Contact-independent haemolysis is a phenomenon were pH exerts a key role, triggering the secretion of a lytic molecule and regulating its activity. A partial physicochemical characterization of the haemolytic factor suggests that a protein of M(r) > 30 kDa could be the effector responsible for damage. Furthermore, the parasite-induced membrane permeabilization, detected by measuring potassium escape from the target cell, and an effective osmotic protection by carbohydrates allowed us to relate the previously described pore-forming mechanism involved in contact-dependent cytotoxicity with the contact-independent lysis.
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Affiliation(s)
- P L Fiori
- Institute of Microbiology and Virology, University of Sassari, Italy
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21
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Caruzzo C, Liboni W, Sechi A, Bonzano A, Bobbio M, Scrocca I, Marengo C, Caruzzo E. [Comparison between Doppler CW and Duplex-Scanning in the assessment of silent peripheral vascular lesions in a population of ischemic heart disease patients]. Minerva Cardioangiol 1989; 37:269-72. [PMID: 2812444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A recent ultrasound technique, Duplex Scanning (D-S), endowed with significant sensitivity, specificity and accuracy has been used to screen atherosclerotic disease in subjects at risk. Within the context of a transverse investigation aimed at identifying the multi-district nature of atherosclerotic plaques, the sensitivity and specificity values and the concordance index of Doppler C.W. (D-CW) have been checked using the D-S in carotid districts as a reference test in 205 patients suffering from ischaemic cardiopathy, asymptomatic for carotid vasculopathy, aged between 45 and 55. 170 patients had the D-CW and the D-S in 340 carotid vessels. D-CW revealed atherosclerotic changes in 122 carotids (prevalence 36%) while the D-S in 119 districts (prevalence 35%) revealed plaques greater than simple thickening, of which 89 (26%) with stenosis less than 30% and 30 (9%) with stenosis greater than 30%. Of the latter, 25 were greater than 60% and 5 less than 60%: one of them provoked a stenosis greater than 75%, the limit beyond which the change becomes haemodynamically significant. D-CW showed 46% sensitivity, a specificity of 70% and a concordance percentage of 59% with respect to D-S. D-CW sensitivity proved apparently low as did the concordance percentage between C-CW and D-S. However, considering that the lesions encountered were prevalently all haemodynamically non-significant, these values may become acceptable.(ABSTRACT TRUNCATED AT 250 WORDS)
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22
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Caruzzo C, Riba U, Gillio S, Sechi A, Bonzano A. [Correlations between risk factors and morphology of carotid atherosclerotic lesions studied with the Duplex-Scanner]. Minerva Cardioangiol 1986; 34:171-81. [PMID: 3523285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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23
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Riba U, Gillio S, Caruzzo C, Sechi A, Bonzano A. [Correlations between risk factors and atherosclerotic disease of the carotid arteries. Investigation with the Duplex scanner]. Minerva Cardioangiol 1986; 34:87-97. [PMID: 3520387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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24
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Caruzzo C, Sechi A, Monti C, Campagna G, Spinnler MT. [Effects of medical therapy on long-term survival in ischemic heart disease]. Minerva Cardioangiol 1984; 32:887-93. [PMID: 6152332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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25
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Caruzzo C, Sechi A, Massobrio N, Deorsola A. [Effect of various risk factors on long-term survival in ischemic heart disease]. Minerva Cardioangiol 1984; 32:895-902. [PMID: 6531096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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