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Pitocco D, Popolla V, Rizzi A, Lancellotti S, Tartaglione L, Sacco M, Viti L, Mazzotta FA, Iezzi R, Santoliquido A, Caputo S, Flex A, Pontecorvi A, De Cristofaro R. Von Willebrand factor hyperactivity affects the outcome of lower limb revascularization in subjects with type 2 diabetes mellitus complicated by diabetic foot vasculopathy: An observational pilot study. J Diabetes Complications 2024; 38:108653. [PMID: 38039934 DOI: 10.1016/j.jdiacomp.2023.108653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 08/08/2023] [Accepted: 11/24/2023] [Indexed: 12/03/2023]
Abstract
Aim of this study is to evaluate any differences in VWF antigen, VWF activity and ADAMTS-13 activity before and after successful and non-successful Percutaneous Transluminal Angioplasty (PTA) in subjects with type 2 diabetes (T2DM) complicated by Chronic limb-threatening ischemia (CLTI) in diabetic foot vasculopathy. METHODS In this prospective observational pilot study, we enrolled 35 T2DM subjects who underwent lower limb PTA. Transcutaneous oximetry was performed in all patients before and 6 weeks after PTA. The change in oxygen partial pressure (TcpO2) before and after PTA was expressed as TcpO2-delta (ΔTcpO2). VWF antigen, VWF activity and ADAMTS-13 activity were measured before and 6 weeks after PTA; changes were expressed as delta and ratio from baseline. RESULTS Subjects with ∆TcpO2 < 15 mmHg presented higher ΔVWF activity (p = 0.050) and lower ADAMTS-13 activity ratio (p = 0.080). Subjects with ∆TcpO2 < 30 mmHg showed lower ADAMTS-13 activity Δ and ratio (p = 0.028). CONCLUSIONS VWF antigen levels and VWF activity may potentially affect PTA outcome. Higher levels of VWF could derive from VWF release as consequence of PTA-induced mechanical endothelial damage and/or oxidative stress-induced modifications of VWF structure with impairment of VWF-ADAMTS13 interactions.
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Affiliation(s)
- Dario Pitocco
- Diabetes Care Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome, Italy.
| | - Valentina Popolla
- Diabetes Care Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome, Italy
| | - Alessandro Rizzi
- Diabetes Care Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome, Italy
| | - Stefano Lancellotti
- Hemorrhagic and Thrombotic Diseases Center, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome, Italy
| | - Linda Tartaglione
- Diabetes Care Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome, Italy
| | - Monica Sacco
- Hemorrhagic and Thrombotic Diseases Center, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome, Italy
| | - Luca Viti
- Diabetes Care Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome, Italy
| | - Francesco Antonio Mazzotta
- Department of Endocrinology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome, Italy
| | - Roberto Iezzi
- Diagnostic Radiology and General Interventional Radiology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome, Italy
| | - Angelo Santoliquido
- Department of cardiovascular sciences, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome, Italy
| | - Salvatore Caputo
- Diabetes Care Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome, Italy
| | - Andrea Flex
- Department of Internal Medicine, Medical Clinic and Vascular Diseases, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome, Italy
| | - Alfredo Pontecorvi
- Department of Endocrinology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome, Italy
| | - Raimondo De Cristofaro
- Hemorrhagic and Thrombotic Diseases Center, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica del Sacro Cuore Rome, Italy
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Lancellotti S, Sacco M, De Cristofaro R. Commentary on "Structural analyses of β2-glycoprotein I: is there a circular conformation?". J Thromb Haemost 2023; 21:3354-3356. [PMID: 38000852 DOI: 10.1016/j.jtha.2023.07.024] [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: 07/24/2023] [Accepted: 07/26/2023] [Indexed: 11/26/2023]
Affiliation(s)
- Stefano Lancellotti
- Dipartimento di Diagnostica per Immagini, radioterapia oncologica d Ematologia, Servizio Malattie Emorragiche e Trombotiche, Fondazione Policlinico Universitario "A. Gemell" IRCCS, Roma, Italy
| | - Monica Sacco
- Dipartimento di Diagnostica per Immagini, radioterapia oncologica d Ematologia, Servizio Malattie Emorragiche e Trombotiche, Fondazione Policlinico Universitario "A. Gemell" IRCCS, Roma, Italy; Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica S. Cuore, Facoltà di Medicina e Chirurgia "Agostino Gemelli," Roma, Italy
| | - Raimondo De Cristofaro
- Dipartimento di Diagnostica per Immagini, radioterapia oncologica d Ematologia, Servizio Malattie Emorragiche e Trombotiche, Fondazione Policlinico Universitario "A. Gemell" IRCCS, Roma, Italy; Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica S. Cuore, Facoltà di Medicina e Chirurgia "Agostino Gemelli," Roma, Italy.
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Lancellotti S, Sacco M, Tardugno M, Ferretti A, De Cristofaro R. Immune and Hereditary Thrombotic Thrombocytopenic Purpura: Can ADAMTS13 Deficiency Alone Explain the Different Clinical Phenotypes? J Clin Med 2023; 12:3111. [PMID: 37176552 PMCID: PMC10179526 DOI: 10.3390/jcm12093111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/17/2023] [Accepted: 04/19/2023] [Indexed: 05/15/2023] Open
Abstract
Thrombotic thrombocytopenic purpura (TTP) is a thrombotic microangiopathy caused by a hereditary or immune-mediated deficiency of the enzyme ADAMTS13 (a disintegrin and metalloproteinase with a thrombospondin type 1 motif, member 13). TTPs are caused by the following pathophysiological mechanisms: (1) the presence of inhibitory autoantibodies against ADAMTS13; and (2) hereditary mutations of the ADAMTS13 gene, which is present on chromosome 9. In both syndromes, TTP results from a severe deficiency of ADAMTS13, which is responsible for the impaired proteolytic processing of high-molecular-weight von Willebrand factor (HMW-VWF) multimers, which avidly interact with platelets and subendothelial collagen and promote tissue and multiorgan ischemia. Although the acute presentation of the occurring symptoms in acquired and hereditary TTPs is similar (microangiopathic hemolytic anemia, thrombocytopenia, and variable ischemic end-organ injury), their intensity, incidence, and precipitating factors are different, although, in both forms, a severe ADAMTS13 deficiency characterizes their physiopathology. This review is aimed at exploring the possible factors responsible for the different clinical and pathological features occurring in hereditary and immune-mediated TTPs.
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Affiliation(s)
- Stefano Lancellotti
- Servizio Malattie Emorragiche e Trombotiche, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Roma, Italy;
| | - Monica Sacco
- Dipartimento di Medicina e Chirurgia Traslazionale, Facoltà di Medicina e Chirurgia “Agostino Gemelli”, Università Cattolica S. Cuore, 00168 Roma, Italy; (M.S.); (M.T.)
| | - Maira Tardugno
- Dipartimento di Medicina e Chirurgia Traslazionale, Facoltà di Medicina e Chirurgia “Agostino Gemelli”, Università Cattolica S. Cuore, 00168 Roma, Italy; (M.S.); (M.T.)
| | - Antonietta Ferretti
- Dipartimento di Medicina e Chirurgia Traslazionale, Facoltà di Medicina e Chirurgia “Agostino Gemelli”, Università Cattolica S. Cuore, 00168 Roma, Italy; (M.S.); (M.T.)
| | - Raimondo De Cristofaro
- Servizio Malattie Emorragiche e Trombotiche, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Roma, Italy;
- Dipartimento di Medicina e Chirurgia Traslazionale, Facoltà di Medicina e Chirurgia “Agostino Gemelli”, Università Cattolica S. Cuore, 00168 Roma, Italy; (M.S.); (M.T.)
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D'Amario D, Galli M, Cappannoli L, Canonico F, Restivo A, Arcudi A, Scacciavillani R, Riccioni ME, Vergallo R, Montone RA, Conte A, Meleo E, Lancellotti S, Sacco M, Antonelli M, Andreotti F, DE Cristofaro R, Crea F. Oral anticoagulants in fragile patients with percutaneous endoscopic gastrostomy and atrial fibrillation: the ORIGAMI pilot investigation. Minerva Cardiol Angiol 2023; 71:109-116. [PMID: 35166091 DOI: 10.23736/s2724-5683.21.05903-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Extensive data support the superior safety without any trade-off in efficacy of direct oral anticoagulants (DOACs) compared to vitamin K antagonists (VKA) in patients with nonvalvular atrial fibrillation, deep venous thrombosis or pulmonary embolism. Whether DOACs may be successfully used to treat complex and fragile patients with percutaneous endoscopic gastrostomy (PEG) remains to be proven. The purpose of this pilot study was to evaluate the feasibility, anticoagulant effect, and preliminary safety/efficacy profile of edoxaban administered via PEG in patients with an indication for long-term oral anticoagulation. METHODS In this prospective, single-arm, pilot study, 12 patients with PEG and guideline-recommended indication for anticoagulation for nonvalvular atrial fibrillation were prospectively enrolled. Crushed edoxaban at approved doses was administered via PEG. Quantitative measures of edoxaban's antifactor Xa activity were performed at steady state. Thromboembolic and bleeding events were assessed at one-month follow-up. RESULTS Steady state edoxaban plasma levels were at therapeutic range in all patients; mean plasma concentration was 208.5 (±78.6) ng/mL. At one month follow-up, none had suffered a thromboembolic event; one developed minor bleeding, and one died from non-cardiovascular death, owing to sudden worsening of a pre-existing underlying severe condition. CONCLUSIONS In this pilot investigation, we report for the first time that crushed edoxaban, administered at approved doses through PEG in fragile and complex patients, is feasible, results in therapeutic edoxaban concentrations, and is apparently effective and safe.
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Affiliation(s)
- Domenico D'Amario
- Department of Cardiovascular Sciences, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy - .,Sacred Heart Catholic University, Rome, Italy -
| | - Mattia Galli
- Department of Cardiovascular Sciences, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy.,Sacred Heart Catholic University, Rome, Italy
| | | | - Francesco Canonico
- Department of Cardiovascular Sciences, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy
| | | | | | | | | | - Rocco Vergallo
- Department of Cardiovascular Sciences, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy.,Sacred Heart Catholic University, Rome, Italy
| | - Rocco A Montone
- Department of Cardiovascular Sciences, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy
| | - Amelia Conte
- NEMO Center, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy
| | - Emiliana Meleo
- NEMO Center, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy
| | | | | | - Massimo Antonelli
- Sacred Heart Catholic University, Rome, Italy.,NEMO Center, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy.,Department of Emergency Sciences, Anesthesiology and Intensive Care, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy
| | - Felicita Andreotti
- Department of Cardiovascular Sciences, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy.,Sacred Heart Catholic University, Rome, Italy
| | - Raimondo DE Cristofaro
- Sacred Heart Catholic University, Rome, Italy.,NEMO Center, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy.,Department of Emergency Sciences, Anesthesiology and Intensive Care, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy.,Section of Hemorrhagic and Thrombotic Diseases, Department of Medicine and Translational Surgery, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy
| | - Filippo Crea
- Department of Cardiovascular Sciences, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy.,Sacred Heart Catholic University, Rome, Italy
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Sacco M, Tardugno M, Lancellotti S, Ferretti A, Ponziani FR, Riccardi L, Zocco MA, De Magistris A, Santopaolo F, Pompili M, De Cristofaro R. ADAMTS-13/von Willebrand factor ratio: A prognostic biomarker for portal vein thrombosis in compensated cirrhosis. A prospective observational study. Dig Liver Dis 2022; 54:1672-1680. [PMID: 35778228 DOI: 10.1016/j.dld.2022.06.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 05/13/2022] [Accepted: 06/07/2022] [Indexed: 12/30/2022]
Abstract
BACKGROUND AND AIMS In cirrhosis, decreased portal flow velocity, thrombophilia factors, and portal hypertension are considered risk factors for portal vein thrombosis (PVT). In cirrhosis, the transformation of the stellate cells causes a progressive decrease of ADAMTS-13, while VWF multimers secretion by endothelial cells is strongly enhanced. This imbalance leads to an accumulation of ultra-large VWF multimers that in sinusoidal circulation could favor PVT both in intra- and extra-hepatic branches, mostly in decompensated cirrhosis. This prospective study was aimed at identifying possible clinical, biochemical, and hemostatic factors predictive for non-tumoral PVT in a cohort of patients with compensated cirrhosis. METHODS Seventynine compensated cirrhosis patients were prospectively followed for 48 months, receiving a periodic Doppler-ultrasound liver examination associated with an extensive evaluation of clinical, biochemical, and hemostatic profile. RESULTS Five patients developed PVT (cumulative prevalence = 6.3%), occurring 4-36 months after enrollment. In logistic regression analysis, the ADAMTS-13/VWF:GpIbR ratio < 0.4 was the only independent variable significantly associated with PVT (OR 14.6, 95% C.I.:1.36-157.2, p = 0.027). A Cox-regression-analysis confirmed this finding (HR = 7.7, p = 0.027). CONCLUSIONS The ADAMTS-13/VWF ratio < 0.4 measured in compensated cirrhosis could be a reliable predictive biomarker for PVT development, paving the way to novel therapeutic strategies to prevent and treat PVT in this clinical setting.
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Affiliation(s)
- Monica Sacco
- Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica S. Cuore, Facoltà di Medicina e Chirurgia "Agostino Gemelli", Roma, Italy
| | - Maira Tardugno
- Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica S. Cuore, Facoltà di Medicina e Chirurgia "Agostino Gemelli", Roma, Italy
| | - Stefano Lancellotti
- Servizio Malattie Emorragiche e Trombotiche, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Roma, Italy
| | - Antonietta Ferretti
- Servizio Malattie Emorragiche e Trombotiche, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Roma, Italy
| | - Francesca Romana Ponziani
- Dipartimento di Scienze Mediche e Chirurgiche, Hepatology Service, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Università Cattolica S. Cuore, Roma, Italy
| | - Laura Riccardi
- Dipartimento di Scienze Mediche e Chirurgiche, Hepatology Service, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Università Cattolica S. Cuore, Roma, Italy
| | - Maria Assunta Zocco
- Dipartimento di Scienze Mediche e Chirurgiche, Hepatology Service, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Università Cattolica S. Cuore, Roma, Italy
| | - Antonio De Magistris
- Dipartimento di Scienze Mediche e Chirurgiche, Hepatology Service, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Università Cattolica S. Cuore, Roma, Italy
| | - Francesco Santopaolo
- Dipartimento di Scienze Mediche e Chirurgiche, Hepatology Service, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Università Cattolica S. Cuore, Roma, Italy
| | - Maurizio Pompili
- Dipartimento di Scienze Mediche e Chirurgiche, Hepatology Service, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Università Cattolica S. Cuore, Roma, Italy
| | - Raimondo De Cristofaro
- Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica S. Cuore, Facoltà di Medicina e Chirurgia "Agostino Gemelli", Roma, Italy; Servizio Malattie Emorragiche e Trombotiche, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Roma, Italy.
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Ponziani FR, Sacco M, Tardugno M, Santopaolo F, Marsico A, Manna S, Lancellotti S, Gasbarrini A, De Cristofaro R, Pompili M. Low ADAMTS-13/VWF ratio and altered gut–liver axis predict complications of advanced chronic liver disease: a pilot study. Gastroenterol Rep (Oxf) 2022; 10:goac065. [PMCID: PMC9639792 DOI: 10.1093/gastro/goac065] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 09/23/2022] [Accepted: 10/18/2022] [Indexed: 11/09/2022] Open
Affiliation(s)
- Francesca Romana Ponziani
- Corresponding author. Internal Medicine and Gastroenterology–Hepatology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS; Catholic University, 00168 Rome, Italy. Tel: +39-3471227242;
| | - Monica Sacco
- Hemorrhagic and Thrombotic Diseases Service, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Maira Tardugno
- Hemorrhagic and Thrombotic Diseases Service, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Francesco Santopaolo
- Internal Medicine and Gastroenterology–Hepatology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Adriana Marsico
- Internal Medicine and Gastroenterology–Hepatology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Stefano Manna
- Internal Medicine and Gastroenterology–Hepatology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Stefano Lancellotti
- Hemorrhagic and Thrombotic Diseases Service, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Antonio Gasbarrini
- Internal Medicine and Gastroenterology–Hepatology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy,Translational Medicine and Surgery Department, Catholic University, Rome, Italy
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7
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Di Gennaro L, Valentini P, Sorrentino S, Ferretti MA, De Candia E, Basso M, Lancellotti S, De Cristofaro R, De Rose C, Mariani F, Morello R, Lazzareschi I, Sigfrid L, Munblit D, Buonsenso D. Extended coagulation profile of children with Long Covid: a prospective study. Sci Rep 2022; 12:18392. [PMID: 36319840 PMCID: PMC9626616 DOI: 10.1038/s41598-022-23168-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 10/26/2022] [Indexed: 11/18/2022] Open
Abstract
Emerging data suggests that endotheliopathy changes can be associated with post covid condition (PCC) in adults. Research on the matter in children is lacking. We analyzed an extended coagulation profile including biomarkers of endothelial damage in children with PCC and compared it with a control group of children that fully recovered post- SARS-CoV-2 infection. A case-control study enrolling children below 18 years of age with previous microbiologically confirmed SARS-CoV-2 infection in a pediatric post-covid unit in Italy ≥ 8 weeks after the initial infection. Samples were taken at 8 and 12 weeks after the SARS-CoV-2 diagnosis and analyzed for coagulation profiling (fibrinogen, prothrombin time, international normalized ratio, activated partial thromboplastin time, d-dimers, factor VIII coagulant activity, plasma von Willebrand factor (VWF) antigen and VWF ristocetin cofactor (RC)). We compared coagulation profiles in samples from children identified with PCC (at least one, or three or more symptoms, which could not be explained by an alternative diagnosis, at the 8- and 12-week follow-up assessment using the pediatric Long Covid International Severe Acute Respiratory and Emerging Infection Consortium (ISARIC) survey. Seventy-five children were enrolled, 49.3% were females, the median age was 10.2 (IQR 4.9) years. Forty-six (61%) of the children had at least one persisting symptom at the eight weeks post-onset, (PCC8); 39/75 (52%) had persistent symptoms for more than 12 weeks (PCC12) and 15/75(32%) had at least three persisting symptoms (PCC ≥ 3) at 12 weeks. Children with PCC presented more frequently with abnormal D-Dimer levels above the reference range compared to children that had fully recovered at the 8-12 weeks (39.1% vs. 17.2%, p = 0.04), and 12 week follow up or more (41% vs. 17.2%, p = 0.05), and in children with three or more symptoms at 12 weeks follow up compared to those that had recovered (64.3% vs. 22.2%, p = 0.002). For the other coagulation profiles, there were abnormal values detected for VWF, FVIII, RC and Fibrinogen but no significant differences between children with PCC compared to controls. Although the majority of children in our cohort showed coagulation profile within or close to normal ranges, we found that a higher proportion of children with PCC, and specifically those with a more severe spectrum characterized with three or more persisting symptoms, had abnormal D-dimer levels compared to other children that fully recovered from an acute SARS-CoV-2 infection.
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Affiliation(s)
- Leonardo Di Gennaro
- Department of Diagnostic Imaging, Radiotherapy, Oncology and Haematology, Hemorrhagic and Thrombotic Diseases Center, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Piero Valentini
- Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Silvia Sorrentino
- Department of Diagnostic Imaging, Radiotherapy, Oncology and Haematology, Hemorrhagic and Thrombotic Diseases Center, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Maria Antonietta Ferretti
- Department of Diagnostic Imaging, Radiotherapy, Oncology and Haematology, Hemorrhagic and Thrombotic Diseases Center, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Erica De Candia
- Department of Diagnostic Imaging, Radiotherapy, Oncology and Haematology, Hemorrhagic and Thrombotic Diseases Center, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
- Istituto di Ematologia, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Maria Basso
- Department of Diagnostic Imaging, Radiotherapy, Oncology and Haematology, Hemorrhagic and Thrombotic Diseases Center, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Stefano Lancellotti
- Department of Diagnostic Imaging, Radiotherapy, Oncology and Haematology, Hemorrhagic and Thrombotic Diseases Center, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Raimondo De Cristofaro
- Department of Diagnostic Imaging, Radiotherapy, Oncology and Haematology, Hemorrhagic and Thrombotic Diseases Center, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
- Istituto di Ematologia, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Cristina De Rose
- Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Francesco Mariani
- Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Rosa Morello
- Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Ilaria Lazzareschi
- Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Louise Sigfrid
- Nuffield Department of Medicine, International Severe Acute Respiratory and Emerging Infection Consortium Global Support Centre, Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
| | - Daniel Munblit
- Department of Paediatrics and Paediatric Infectious Diseases, Institute of Child's Health, Sechenov First Moscow State Medical University, Moscow, Russia
- Inflammation, Repair and Development Section, Faculty of Medicine, National Heart and Lung Institute, Imperial College London, London, W2 1PG, UK
| | - Danilo Buonsenso
- Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy.
- Centro di Salute Globale, Università Cattolica del Sacro Cuore, Rome, Italy.
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8
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Petrucci G, Viti L, Sacco M, Hatem D, Lancellotti S, Rizzi A, Zaccardi F, De Cristofaro R, Pitocco D, Patrono C, Rocca B. Effect of low-dose rivaroxaban with low-dose aspirin vs low-dose aspirin on platelet and oxidative biomarkers: a randomized study in diabetes patients with stable peripheral or coronary artery disease. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2719] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Rivaroxaban (Riva), a direct FXa inhibitor, at 2.5 mg twice-daily (bid) combined with low-dose aspirin (ASA, 100 mg once daily-od) reduced major vascular events vs. ASA alone in subjects with stable coronary artery (CAD) or symptomatic peripheral artery disease (PAD). Whether this benefit is due to the anticoagulant effect or additional FXa-mediated effects through the platelet and endothelial cell thrombin receptors is unknown. Type 2 diabetes mellitus (T2DM) is characterized by high platelet activation and oxidative stress that may contribute to increased cardiovascular risk.
Purpose
We investigated the effects of Riva (2.5 mg bid) + ASA (100 mg od) vs. ASA (100 mg od) alone on platelet and oxidative biomarkers in subjects with T2DM and stable vascular disease (stable CAD, symptomatic PAD and/or significant carotid stenosis).
Methods
In this randomized, open-label, cross-over trial, patients were randomized to continue ASA for 4 weeks and then add Riva for 4 weeks, or add Riva in the first 4 weeks and then continue with ASA alone for 4 weeks. Primary endpoints were: in vivo platelet activation and lipid peroxidation, assessed by the urinary excretion of 11-dehydro-TXB2 (TXM) and 8-iso-PGF2alpha (ISOP), respectively. Secondary endpoints included: routine coagulation tests, D-dimer, thrombin generation, serum TXB2, and Riva plasma concentrations.
Results
Seventy-6 subjects (10 females) were recruited: age 68±7 years (mean±SD); BMI 27.1±3.5 kg/m2; fasting glucose 129±31 mg/dL; HbA1c 6.8±0.9%; serum creatinine 1±0.25 mg/dL; LDL-cholesterol 77±31 mg/dL. Two patients dropped out: one for benign, self-limiting hematuria, one for unwillingness to continue, 8 subjects are completing the study leaving 66 who completed the 8-week randomized treatment and showed no sequence effect. Urinary TXM and ISOP were significantly reduced by Riva+ASA vs. ASA alone: TXM was 260 [195–398] vs. 335 [225–441] pg/mg creatinine and ISOP 722 [601–991] vs. 827 [648–1350] pg/mg creatinine (median [IQR]) on Riva+ASA vs. ASA alone, respectively (p<0.001 for paired samples). Riva plasma concentrations were 48±1.9 ng/ml at peak and 21±1.4 ng/ml at trough. The velocity of thrombin formation significantly decreased with Riva+ASA vs. ASA alone (velocity index, 46±3% vs. 83±3%; peak-height, 66±2% vs. 83±1%, respectively). aPTT levels were slightly but significantly prolonged by Riva vs. ASA alone (44±1 vs. 39±1 sec). Serum TXB2, D-dimer, von Willebrand factor, PT, fibrinogen and endogenous thrombin potential values were similar between treatments.
Conclusions
In ASA-treated subjects with T2DM and stable vascular disease, the addition of very low-dose Riva restrained incompletely-suppressed lipid peroxidation and platelet activation and modified the kinetics of thrombin formation. These changes may contribute to the beneficial effects of the Riva+ASA combination.
Funding Acknowledgement
Type of funding sources: Private grant(s) and/or Sponsorship. Main funding source(s): Investigator-initiated study funded by Bayer AG
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Affiliation(s)
- G Petrucci
- Catholic University School of Medicine , Rome , Italy
| | - L Viti
- Catholic University of the Sacred Heart - Fondazione Policlinico Universitario A. Gemelli IRCCS , Rome , Italy
| | - M Sacco
- Catholic University of the Sacred Heart - Fondazione Policlinico Universitario A. Gemelli IRCCS , Rome , Italy
| | - D Hatem
- Catholic University School of Medicine , Rome , Italy
| | - S Lancellotti
- Catholic University of the Sacred Heart - Fondazione Policlinico Universitario A. Gemelli IRCCS , Rome , Italy
| | - A Rizzi
- Catholic University School of Medicine , Rome , Italy
| | - F Zaccardi
- Leicester Diabetes Centre , Leicester , United Kingdom
| | - R De Cristofaro
- Catholic University of the Sacred Heart - Fondazione Policlinico Universitario A. Gemelli IRCCS , Rome , Italy
| | - D Pitocco
- Catholic University of the Sacred Heart - Fondazione Policlinico Universitario A. Gemelli IRCCS , Rome , Italy
| | - C Patrono
- Catholic University School of Medicine , Rome , Italy
| | - B Rocca
- Catholic University School of Medicine , Rome , Italy
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9
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Sacco M, Lancellotti S, Branchini A, Tardugno M, Testa MF, Lunghi B, Bernardi F, Pinotti M, Giusti B, Castaman G, De Cristofaro R. The p.P1127S pathogenic variant lowers von Willebrand factor levels through higher affinity for the macrophagic scavenger receptor LRP1: Clinical phenotype and pathogenic mechanisms. J Thromb Haemost 2022; 20:1818-1829. [PMID: 35596664 PMCID: PMC9545986 DOI: 10.1111/jth.15765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 04/28/2022] [Accepted: 05/17/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND The index case is a 21-year-old Italian woman with a mild hemorrhagic syndrome and von Willebrand factor antigen (VWF:Ag) = 34.3 U/dl, VWF recombinant glycoprotein Ib (VWF:GpIbR) = 32.8 U/dl, and factor VIII (FVIII) = 55.3 IU/dl. AIMS The aim of this study is to characterize from a genetic and biochemical standpoint this low VWF phenotype. METHODS Coagulation and biochemical methods were used to study the structural and functional pattern of VWF multimers in the index case's plasma. Recombinant wild-type and p.P1127S VWF variants were produced using human embryonic kidney (HEK)-293 cells. In addition, genetic screening was carried out to detect single nucleotide variants of some scavenger VWF/FVIII receptor genes such as CLEC4M, STAB2, and ASGR2. RESULTS Genetic investigation revealed that the index case inherited from her mother the heterozygous missense mutation c.3379C > T (VWF exon 25), causing the p.P1127S substitution in the VWF D'D3 domain. The index case was also homozygous for the scavenger receptor ASGR2 c.-95 CC-genotype. Desmopressin normalized the VWF level of the patient, although its clearance was faster (t1/2 = 6.7 h) than in normal subjects (t1/2 = 12 ± 0.7 h). FVIII-VWF interaction, A Disintegrin And Metalloprotease with ThromboSpondin type 1 motif-13 levels, ristocetin-induced-platelet-aggregation, and VWF multimeric pattern were normal. The p.P1127S variant was normally synthesized and secreted by HEK-293 cells, and molecular modeling predicts a conformational change showing higher affinity for the macrophagic scavenger receptor lipoprotein receptor-related protein 1 (LRP1), as also experimentally verified. CONCLUSIONS The p.P1127S variant may cause a low VWF phenotype, stemming from an increased VWF affinity for the scavenger receptor LRP1 and, consequently, an accelerated clearance of VWF.
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Affiliation(s)
- Monica Sacco
- Dipartimento di Medicina e Chirurgia TraslazionaleFacoltà di Medicina e Chirurgia “Agostino Gemelli,” Università Cattolica S. CuoreRomaItaly
| | - Stefano Lancellotti
- Servizio Malattie Emorragiche e TromboticheFondazione Policlinico Universitario “A. Gemell” IRCCSRomaItaly
| | - Alessio Branchini
- Dipartimento di Scienze della Vita e BiotecnologieUniversità di FerraraFerraraItaly
| | - Maira Tardugno
- Dipartimento di Medicina e Chirurgia TraslazionaleFacoltà di Medicina e Chirurgia “Agostino Gemelli,” Università Cattolica S. CuoreRomaItaly
| | | | - Barbara Lunghi
- Dipartimento di Scienze della Vita e BiotecnologieUniversità di FerraraFerraraItaly
| | - Francesco Bernardi
- Dipartimento di Scienze della Vita e BiotecnologieUniversità di FerraraFerraraItaly
| | - Mirko Pinotti
- Dipartimento di Scienze della Vita e BiotecnologieUniversità di FerraraFerraraItaly
| | - Betti Giusti
- Dipartimento di Medicina Sperimentale e ClinicaUniversità di FirenzeFirenzeItaly
- Laboratorio Genetico Molecolare Avanzato, SOD Malattie AterotromboticheAzienda Ospedaliero‐ Universitaria “Careggi"FirenzeItaly
| | - Giancarlo Castaman
- Dipartimento di Oncologia, Centro Malattie Emorragiche e della CoagulazioneOspedale Universitario “Careggi”FirenzeItaly
| | - Raimondo De Cristofaro
- Dipartimento di Medicina e Chirurgia TraslazionaleFacoltà di Medicina e Chirurgia “Agostino Gemelli,” Università Cattolica S. CuoreRomaItaly
- Servizio Malattie Emorragiche e TromboticheFondazione Policlinico Universitario “A. Gemell” IRCCSRomaItaly
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10
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Di Gennaro L, Monaco M, Riccio C, De Candia E, Alberelli MA, di Martino C, Basso M, Ferretti MA, Lancellotti S, De Cristofaro R. Direct oral anticoagulants and therapeutic adherence: do not let your guard down. Acta Cardiol 2022; 77:243-249. [PMID: 33896375 DOI: 10.1080/00015385.2021.1908702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND Direct oral anticoagulants (DOAC) and vitamin K antagonist drugs (VKA) are recommended for stroke prevention in atrial fibrillation and for treatment of venous thromboembolism. Undoubtedly, DOAC have contributed to improve quality of life of these patients, but unfortunately, available 'real world' data show a very high variable compliance to DOAC. AIMS AND OBJECTIVES to evaluate predictors that adversely affect therapeutic adherence in patients naive naïve to DOAC. METHODS AND POPULATION this study was conducted on an outpatient population in oral anticoagulant therapy in a period between January 2019 and February 2020. Patients naiveto DOAC and treated for at least 6 months were enrolled. Non-Italian-speaking patients, cognitive or psychiatric disorders, refusal to participate or non-consent to the interview were exclusion criteria. A socio-demographic scale and the 8-item Morisky scale (MMAS-8) questionnaire assessed therapeutic adherence. RESULTS One hundred two DOAC-naïve patients were selected from a population of 407 patients on the first visit at our centre. The population was homogeneously represented for gender (males 48%). The mean age was 79.5 years. Atrial fibrillation (65.7%) resulted the main reason for DOAC prescription and a polypharmacy was detected in 47.1% of the patients. Moreover, an optimal adherence to DOAC therapy was assessed in less than 30% of patients. CONCLUSIONS Polypharmacy, patient's isolation, such as a low education level were statistically associated with a low therapeutic adherence. Therapeutic adherence remains an unsolved problem for anticoagulated patient. To identify patients at higher risk of poor compliance and therapeutic failure and establish targeted care pathways is a priority.
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Affiliation(s)
- Leonardo Di Gennaro
- Department of Diagnostic Imaging, Radiotherapy, Oncology and Haematology, Hemorrhagic and Thrombotic Diseases Center, Foundation "A. Gemelli" IRCCS University Hospital, Rome, Italy
- Faculty of Medicine and Surgery, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Martina Monaco
- Faculty of Medicine and Surgery, College of Nursing, "Università Cattolica del Sacro Cuore", Rome, Italy
| | - Claudia Riccio
- Unit of Chemistry and Biochemistry and Molecular Biology, Foundation "A. Gemelli" IRCCS University Hospital, Rome, Italy
| | - Erica De Candia
- Department of Diagnostic Imaging, Radiotherapy, Oncology and Haematology, Hemorrhagic and Thrombotic Diseases Center, Foundation "A. Gemelli" IRCCS University Hospital, Rome, Italy
- Faculty of Medicine and Surgery, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Maria Adele Alberelli
- Department of Diagnostic Imaging, Radiotherapy, Oncology and Haematology, Hemorrhagic and Thrombotic Diseases Center, Foundation "A. Gemelli" IRCCS University Hospital, Rome, Italy
| | - Cinzia di Martino
- Faculty of Medicine and Surgery, College of Nursing, "Università Cattolica del Sacro Cuore", Rome, Italy
| | - Maria Basso
- Department of Diagnostic Imaging, Radiotherapy, Oncology and Haematology, Hemorrhagic and Thrombotic Diseases Center, Foundation "A. Gemelli" IRCCS University Hospital, Rome, Italy
- Faculty of Medicine and Surgery, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Maria Antonietta Ferretti
- Department of Diagnostic Imaging, Radiotherapy, Oncology and Haematology, Hemorrhagic and Thrombotic Diseases Center, Foundation "A. Gemelli" IRCCS University Hospital, Rome, Italy
- Faculty of Medicine and Surgery, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Stefano Lancellotti
- Department of Diagnostic Imaging, Radiotherapy, Oncology and Haematology, Hemorrhagic and Thrombotic Diseases Center, Foundation "A. Gemelli" IRCCS University Hospital, Rome, Italy
- Faculty of Medicine and Surgery, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Raimondo De Cristofaro
- Department of Diagnostic Imaging, Radiotherapy, Oncology and Haematology, Hemorrhagic and Thrombotic Diseases Center, Foundation "A. Gemelli" IRCCS University Hospital, Rome, Italy
- Faculty of Medicine and Surgery, Università Cattolica del Sacro Cuore, Rome, Italy
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11
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De Cristofaro R, Liuzzo G, Sacco M, Lancellotti S, Pedicino D, Andreotti F. Marked von Willebrand factor and factor VIII elevations in severe acute respiratory syndrome coronavirus-2-positive, but not severe acute respiratory syndrome coronavirus-2-negative, pneumonia: a case-control study. Blood Coagul Fibrinolysis 2021; 32:285-289. [PMID: 33443926 DOI: 10.1097/mbc.0000000000000998] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 02/07/2023]
Abstract
Patients with novel coronavirus pneumonia show increased thrombotic risk. Although hemostatic alterations have been described in novel coronavirus pneumonia patients, case-control studies of von Willebrand factor (VWF), factor VIII (FVIII), and a disintegrin-like and metalloprotease with thrombospondin type I motif, member 13 (ADAMTS13) are lacking. VWF, ADAMTS13, FVIII, d-dimer, C-reactive protein, and routine blood cells and chemistry were measured in 10 novel coronavirus pneumonia patients and 10 non-novel coronavirus pneumonia controls. Hemostatic factors were measured less than 48 h of hospital admission in patients without invasive ventilation. d-Dimer, C-reactive protein, and fibrinogen concentrations, high in both groups, did not differ significantly in novel coronavirus pneumonia vs. non-novel coronavirus pneumonia patients. Median VWF-antigen (324 vs. 153 IU/dl, P < 0.0001), VWF-Rco (342 vs. 133 IU/dl, P < 0.001), and FVIII-activity levels (203 vs. 123 IU/dl, P < 0.0001) were significantly higher in novel coronavirus pneumonia cases vs. controls ADAMTS13-activity was normal in both groups. Coronavirus pneumonia cases vs. non-novel coronavirus pneumonia controls showed marked VWF/FVIII elevation, suggesting specific virus-induced endothelial activation causing VWF/FVIII hypersecretion, which may represent a therapeutic target in novel coronavirus pneumonia.
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Affiliation(s)
- Raimondo De Cristofaro
- Servizio Malattie Emorragiche e Trombotiche, Fondazione Policlinico Universitario A. Gemelli IRCCS
- Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica S. Cuore, Facoltà di Medicina e Chirurgia 'Agostino Gemelli'
| | - Giovanna Liuzzo
- Dipartimento di Scienze Cardiovascolari, Fondazione Policlinico Universitario A. Gemelli IRCCS
- Università Cattolica del Sacro Cuore, Rome, Italy
| | - Monica Sacco
- Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica S. Cuore, Facoltà di Medicina e Chirurgia 'Agostino Gemelli'
| | - Stefano Lancellotti
- Servizio Malattie Emorragiche e Trombotiche, Fondazione Policlinico Universitario A. Gemelli IRCCS
| | - Daniela Pedicino
- Dipartimento di Scienze Cardiovascolari, Fondazione Policlinico Universitario A. Gemelli IRCCS
| | - Felicita Andreotti
- Dipartimento di Scienze Cardiovascolari, Fondazione Policlinico Universitario A. Gemelli IRCCS
- Università Cattolica del Sacro Cuore, Rome, Italy
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12
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Tripiciano C, Zangari P, Montanari M, Leone G, Massella L, Garaboldi L, Massoud M, Lancellotti S, Strocchio L, Manno EC, Palma P, Corsetti T, Luciani M. Case Report: Two Cases of Pediatric Thrombotic Thrombocytopenic Purpura Treated With Combined Therapy. Front Pediatr 2021; 9:743206. [PMID: 34796152 PMCID: PMC8593254 DOI: 10.3389/fped.2021.743206] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Accepted: 10/01/2021] [Indexed: 01/14/2023] Open
Abstract
Thrombotic thrombocytopenic purpura (TTP) is a thrombotic microangiopathy caused by a severely reduced activity of the von Willebrand factor-cleaving protease ADAMTS13. Over 95% of TTPs are acquired, due to autoantibody inhibitors. In children, acquired TTP is a very rare, life-threatening disease. To date, no consensus exists on the treatment strategy of pediatric TTP. We report the cases of two pediatric patients with a diagnosis of TTP, successfully treated with a combination of various therapeutic approaches. Although the patients complained of different sets of symptoms, laboratory data showed Coombs negative hemolytic anemia, renal impairment, and low platelet count in both cases. The diagnosis of acquired TTP was supported by the PLASMIC score and confirmed by the reduction of the ADAMTS13 activity and the presence of anti-ADAMTS13 antibodies. Intravenous immunoglobulin, corticosteroids, and plasma exchange (PEX) were performed without delay. As soon as available, caplacizumab was added to the therapy, with a prompt normalization of platelet count. Nevertheless, ADAMTS13 activity was persistently low, and anti-ADAMTS13 antibodies level was high; thus, a course of rituximab was administered, with persistent normalization of laboratory findings. No adverse events were observed during the treatment. In our experience, the combined use of PEX, caplacizumab, and immunosuppressive therapy during the acute phase of the disease is safe and may have a significant impact on the prognosis with successful clinical outcome and decrease in life-threatening events.
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Affiliation(s)
- Costanza Tripiciano
- Unit of Clinical Immunology and Vaccinology, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy.,Academic Department of Pediatrics, University of Rome Tor Vergata, Rome, Italy
| | - Paola Zangari
- Unit of Clinical Immunology and Vaccinology, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Mauro Montanari
- Unit of Transfusion Medicine, Department of Diagnostic and Laboratory Medicine, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Giovanna Leone
- Unit of Transfusion Medicine, Department of Diagnostic and Laboratory Medicine, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Laura Massella
- Department of Pediatric Subspecialties, Division of Nephrology, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Lucia Garaboldi
- Unit of Hospital Pharmacy, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Michela Massoud
- Department of Pediatric Hemato-Oncology and Cell and Gene Therapy, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Stefano Lancellotti
- Haemorrhagic and Thrombotic Diseases Service, Area of Hematology, Fondazione Policlinico Universitario "A. Gemelli", IRCCS, Rome, Italy
| | - Luisa Strocchio
- Department of Pediatric Hemato-Oncology and Cell and Gene Therapy, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Emma Concetta Manno
- Unit of Clinical Immunology and Vaccinology, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Paolo Palma
- Unit of Clinical Immunology and Vaccinology, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy.,Chair of Pediatrics, Department of Systems Medicine, University of Rome "Tor Vergata", Rome, Italy
| | - Tiziana Corsetti
- Unit of Hospital Pharmacy, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Matteo Luciani
- Department of Pediatric Hemato-Oncology and Cell and Gene Therapy, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
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13
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Sacco M, Ranalli P, Lancellotti S, Petrucci G, Dragani A, Rocca B, De Cristofaro R. Increased von Willebrand factor levels in polycythemia vera and phenotypic differences with essential thrombocythemia. Res Pract Thromb Haemost 2020; 4:413-421. [PMID: 32211575 PMCID: PMC7086469 DOI: 10.1002/rth2.12315] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 01/13/2020] [Accepted: 01/17/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Acquired von Willebrand factor (VWF) deficiency was described in Philadelphia-negative myeloproliferative neoplasms, especially in essential thrombocythemia (ET). VWF phenotype in contemporary patients with polycythemia vera (PV) remains less explored. OBJECTIVES To characterize the VWF phenotype in PV and to compare VWF phenotype in PV with matched healthy subjects and ET patients. PATIENTS/METHODS We studied 48 PV patients, treated according to current recommendations (hematocrit ≤ 45%, on low-dose aspirin prophylaxis); 48 healthy and 41 subjects with ET, all sex, age, and blood group matched. We measured VWF antigen, activity, multimeric pattern, ADAMTS-13, and factor VIII (FVIII) antigen. RESULTS In patients with PV, VWF antigen and activity were significantly higher than in healthy subjects (antigen: 119[96-137] vs 93[79-107] IU/dL; activity: 114[95-128] vs 90[79-107] IU/dL, respectively, medians and interquartile, P < 0.01), with normal multimeric distribution. ADAMTS-13 levels were similar between patients with PV and healthy subjects. FVIII levels were higher in PV than in healthy subjects (141[119-169] versus 98[88-123] IU/dL, respectively, P < 0.01). By multivariable analysis, JAK2-p.V617F allelic burden, erythrocyte count, and male sex significantly predicted VWF antigen and activity levels. As compared to patients with ET, patients with PV showed similar VWF antigen levels but approximately 40% higher activity (79[49-104] vs 112[93-125] IU/dL, respectively, P < 0.01). CONCLUSIONS Patients with PV show increased VWF and FVIII levels, predicted by JAK2-p.V617F burden and erythrocyte count. At variance with ET, acquired VWF defect was not observed in PV. High VWF/FVIII levels may sustain the thrombotic diathesis of PV and may be investigated as biomarkers for risk stratification.
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Affiliation(s)
- Monica Sacco
- Servizio Malattie Emorragiche e TromboticheFondazione Policlinico Universitario “A. Gemelli” IRCCSRomaItaly
| | - Paola Ranalli
- Dipartimento di Medicina Interna e Chirurgia TraslazionaleFacoltà di Medicina e Chirurgia “A. Gemelli”Università Cattolica del Sacro CuoreRomaItaly
| | | | - Giovanna Petrucci
- Istituto di FarmacologiaFacoltà di Medicina e Chirurgia “A. Gemelli”Università Cattolica del S. Cuore and Fondazione Policlinico Universitario “A. Gemelli” IRCCSRomeItaly
| | - Alfredo Dragani
- Dipartimento di Medicina Interna e Chirurgia TraslazionaleFacoltà di Medicina e Chirurgia “A. Gemelli”Università Cattolica del Sacro CuoreRomaItaly
| | - Bianca Rocca
- Istituto di FarmacologiaFacoltà di Medicina e Chirurgia “A. Gemelli”Università Cattolica del S. Cuore and Fondazione Policlinico Universitario “A. Gemelli” IRCCSRomeItaly
| | - Raimondo De Cristofaro
- Servizio Malattie Emorragiche e TromboticheFondazione Policlinico Universitario “A. Gemelli” IRCCSRomaItaly
- Dipartimento di EmatologiaOspedale S. SpiritoPescaraItaly
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14
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Lancellotti S, Sacco M, Basso M, De Cristofaro R. Mechanochemistry of von Willebrand factor. Biomol Concepts 2019; 10:194-208. [PMID: 31778361 DOI: 10.1515/bmc-2019-0022] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 10/25/2019] [Indexed: 12/26/2022] Open
Abstract
Von Willebrand factor (VWF), a blood multimeric protein with a very high molecular weight, plays a crucial role in the primary haemostasis, the physiological process characterized by the adhesion of blood platelets to the injured vessel wall. Hydrodynamic forces are responsible for extensive conformational transitions in the VWF multimers that change their structure from a globular form to a stretched linear conformation. This feature makes this protein particularly prone to be investigated by mechanochemistry, the branch of the biophysical chemistry devoted to investigating the effects of shear forces on protein conformation. This review describes the structural elements of the VWF molecule involved in the biochemical response to shear forces. The stretched VWF conformation favors the interaction with the platelet GpIb and at the same time with ADAMTS-13, the zinc-protease that cleaves VWF in the A2 domain, limiting its prothrombotic capacity. The shear-induced conformational transitions favor also a process of self-aggregation, responsible for the formation of a spider-web like network, particularly efficient in the trapping process of flowing platelets. The investigation of the biophysical effects of shear forces on VWF conformation contributes to unraveling the molecular mechanisms of many types of thrombotic and haemorrhagic syndromes.
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Affiliation(s)
- Stefano Lancellotti
- Servizio Malattie Emorragiche e Trombotiche, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Roma, Italy
| | - Monica Sacco
- Istituto di Medicina Interna e Geriatria, Facoltà di Medicina e Chirurgia "A. Gemelli", Università Cattolica S. Cuore, Roma, Italy
| | - Maria Basso
- Servizio Malattie Emorragiche e Trombotiche, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Roma, Italy
| | - Raimondo De Cristofaro
- Servizio Malattie Emorragiche e Trombotiche, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Roma, Italy.,Istituto di Medicina Interna e Geriatria, Facoltà di Medicina e Chirurgia "A. Gemelli", Università Cattolica S. Cuore, Roma, Italy
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15
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Galli M, D'Amario D, Andreotti F, Porto I, Vergallo R, Sabatelli M, Lancellotti S, Meleo E, De Cristofaro R, Crea F. Sustained safe and effective anticoagulation using Edoxaban via percutaneous endoscopic gastrostomy. ESC Heart Fail 2019; 6:884-888. [PMID: 31184800 PMCID: PMC6676270 DOI: 10.1002/ehf2.12434] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 02/22/2019] [Indexed: 12/11/2022] Open
Abstract
Extensive data support the safety of direct oral anticoagulants compared with vitamin K antagonists in patients with non‐valvular atrial fibrillation, leading to a significantly increase in the use of these compounds in clinical practice. However, there is no compelling evidence supporting the use of direct oral anticoagulant in individuals who are intubated or have a percutaneous endoscopic gastrostomy (PEG): patients with several co‐morbidities are underrepresented in clinical trials, so the best long‐term strategy for anticoagulation is difficult to ascertain. The aim of the present report was to evaluate the safety and efficacy of edoxaban administered via PEG in a patient with heart failure and a history of atrial fibrillation affected by amyotrophic lateral sclerosis (ALS). A 71‐year‐old man with atrial fibrillation, advanced ALS, type II diabetes mellitus, and hypertension presented to the emergency department with dyspnoea and tachycardia. Because vitamin K antagonist and rivaroxaban 15 mg were dropped because of difficult international normalized ratio control (time in therapeutic range <30%) and severe haematuria, respectively, edoxaban 30 mg (crushed pill) daily was administered based on the patient's weight of 58 kg. Mean edoxaban plasma concentration–time profiles were measured, as anti‐Xa activity, 2 h before and at 2, 6, and 22 h after drug administration and then compared with the pharmacokinetic profile of edoxaban 30 mg in healthy subjects. An additional testing of steady‐state peak plasma concentration of edoxaban after 10 days and a 30 day follow‐up were evaluated. The values of the pharmacokinetic parameters, analysed with a non‐compartmental analysis by PKSolver module, showed that Cmax and AUC0→t were only slightly higher than those observed in healthy subjects, while the half‐life and observed clearance were significantly longer and lower, respectively, than in normal subjects. Steady‐state peak plasma concentration of edoxaban was very similar to the levels reported in healthy subjects, and neither relevant bleeding nor thromboembolic event was reported at a 30 day follow‐up. These results support safe and effective anticoagulation with edoxaban 30 mg but suggest caution with the use of full dose of edoxaban (60 mg daily) in this kind of patients. We report, for the first time, a safe and effective anticoagulation based on the administration of edoxaban 30 mg daily through PEG in a patient with advanced ALS, acute respiratory, and heart failure, presenting with Takotsubo syndrome and atrial fibrillation.
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Affiliation(s)
- Mattia Galli
- Dipartimento di Scienze Cardiovascolari e Toraciche, Fondazione Policlinico Universitario 'A. Gemelli' IRCCS, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00167, Rome, Italy
| | - Domenico D'Amario
- Dipartimento di Scienze Cardiovascolari e Toraciche, Fondazione Policlinico Universitario 'A. Gemelli' IRCCS, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00167, Rome, Italy
| | - Felicita Andreotti
- Dipartimento di Scienze Cardiovascolari e Toraciche, Fondazione Policlinico Universitario 'A. Gemelli' IRCCS, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00167, Rome, Italy
| | - Italo Porto
- Cardiovascular Disease Unit, Ospedale Policlinico San Martino, IRCCS, University of Genoa, Genoa, Italy
| | - Rocco Vergallo
- Dipartimento di Scienze Cardiovascolari e Toraciche, Fondazione Policlinico Universitario 'A. Gemelli' IRCCS, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00167, Rome, Italy
| | - Mario Sabatelli
- NEuroMuscular Omnicentre (NEMO), Serena Onlus Foundation-Pol. Fondazione Policlinico Universitario 'A. Gemelli' IRCCS, Catholic University of the Sacred Heart School of Medicine, Rome, Italy
| | - Stefano Lancellotti
- Institute of Internal Medicine & Geriatrics, Haemostasis and Thrombosis Center, Fondazione Policlinico Universitario 'A. Gemelli' IRCCS, Area of Hematology, Catholic University of the Sacred Heart School of Medicine, Rome, Italy
| | - Emiliana Meleo
- NEuroMuscular Omnicentre (NEMO), Serena Onlus Foundation-Pol. Fondazione Policlinico Universitario 'A. Gemelli' IRCCS, Catholic University of the Sacred Heart School of Medicine, Rome, Italy
| | - Raimondo De Cristofaro
- Institute of Internal Medicine & Geriatrics, Haemostasis and Thrombosis Center, Fondazione Policlinico Universitario 'A. Gemelli' IRCCS, Area of Hematology, Catholic University of the Sacred Heart School of Medicine, Rome, Italy
| | - Filippo Crea
- Dipartimento di Scienze Cardiovascolari e Toraciche, Fondazione Policlinico Universitario 'A. Gemelli' IRCCS, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00167, Rome, Italy
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De Cristofaro R, Sacco M, Lancellotti S, Berruti F, Garagiola I, Valsecchi C, Basso M, Di Stasio E, Peyvandi F. Molecular Aggregation of Marketed Recombinant FVIII Products: Biochemical Evidence and Functional Effects. TH Open 2019; 3:e123-e131. [PMID: 31249992 PMCID: PMC6524925 DOI: 10.1055/s-0039-1688413] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Accepted: 03/08/2019] [Indexed: 12/12/2022] Open
Abstract
Background Recombinant (rec-) coagulation factor VIII concentrates available for hemophilia A (HA) treatment differ in cell line production and structure, which could affect their pharmacodynamics and immunogenicity. Clinical trials showed that previously untreated patients with severe HA present higher rates of inhibitor development if treated with rec-FVIII products and that differences do exist as to inhibitor's formation among different rec-FVIII products. This finding could arise from several causes, such as absence of von Willebrand factor, different glycosylation profiles, or processes of molecular aggregation of the recombinant FVIII molecules. Objectives/Methods In this study, using size exclusion high-performance liquid chromatography (SE-HPLC), dynamic light scattering (DLS) spectroscopy, and functional biochemical assays, we investigated the purity grade, FX activating ability, and aggregation status of three recombinant marketed products (Advate [Baxalta], Refacto AF [Pfizer], and Kogenate [Bayer]). Results The overall analysis of the results obtained with SE-HPLC and DLS spectroscopy showed that the three recombinant FVIII concentrates contain low but significant amounts of molecular aggregates. This phenomenon was less evident for the Advate product. Molecular aggregation negatively affects the in vitro pharmacodynamics of the concentrates with higher aggregates' content. Conclusions This study shows that the three pharmaceutical formulations of recombinant FVIII contain variable amounts of molecular aggregates after their reconstitution at therapeutic concentrations. This phenomenon negatively affects the in vitro potency of the products with higher aggregates' content and might be invoked as a contributing cause of their increased risk to induce the formation of FVIII inhibitors.
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Affiliation(s)
- Raimondo De Cristofaro
- Haemorrhagic and Thrombotic Diseases Service, Area of Hematology, Fondazione Policlinico Universitario "A. Gemelli," IRCCS, Rome, Italy.,Institute di Internal Medicine and Geriatrics, Catholic University School of Medicine, Rome, Italy
| | - Monica Sacco
- Institute di Internal Medicine and Geriatrics, Catholic University School of Medicine, Rome, Italy
| | - Stefano Lancellotti
- Haemorrhagic and Thrombotic Diseases Service, Area of Hematology, Fondazione Policlinico Universitario "A. Gemelli," IRCCS, Rome, Italy
| | - Federico Berruti
- Institute di Internal Medicine and Geriatrics, Catholic University School of Medicine, Rome, Italy
| | - Isabella Garagiola
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Angelo Bianchi Bonomi Hemophilia and Thrombosis Center and Luigi Villa Foundation, Milan, Italy
| | - Carla Valsecchi
- Institute di Internal Medicine and Geriatrics, Catholic University School of Medicine, Rome, Italy
| | - Maria Basso
- Haemorrhagic and Thrombotic Diseases Service, Area of Hematology, Fondazione Policlinico Universitario "A. Gemelli," IRCCS, Rome, Italy
| | - Enrico Di Stasio
- Institute of Biochemistry and Clinical Biochemistry, Università degli Studi di Milano, Milan, Italy
| | - Flora Peyvandi
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Angelo Bianchi Bonomi Hemophilia and Thrombosis Center and Luigi Villa Foundation, Milan, Italy.,Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy
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Sacco M, Lancellotti S, Berruti F, Arcovito A, Bellelli A, Ricciardelli T, Autiero I, Cavallo L, Oliva R, De Cristofaro R. Apixaban Interacts with Haemoglobin: Effects on Its Plasma Levels. Thromb Haemost 2018; 118:1701-1712. [PMID: 30235484 DOI: 10.1055/s-0038-1669920] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The direct oral anticoagulant apixaban (APX), a strong factor Xa inhibitor, binds also to plasma proteins, especially albumin, and minimally to α1-acid glycoprotein. Although APX can cross the red cell membrane, due to its chemical structure, and could bind to haemoglobin (Hb), no investigation was performed on this possible phenomenon that could affect the APX plasma concentration and thus its pharmacokinetics and pharmacodynamics. We addressed this issue by (1) measuring the levels of APX and haematological/biochemical parameters in 90 patients on APX therapy; (2) assessing the effect of APX on oxygen saturation curves of Hb; (3) testing the direct APX binding to Hb by fluorescence spectroscopy and a zinc-induced precipitation of Hb coupled to a reversed-phase high-performance liquid chromatography (HPLC)-based method; and (4) simulating in silico by molecular docking the APX interaction with human Hb. In a multivariable analysis, Hb was the only independent variable significantly and inversely associated in 90 patients with APX peak plasma level, at variance with patients treated with rivaroxaban (n = 86) and dabigatran (n = 34) therapy. APX causes a progressive left-shift of the oxygen dissociation curve of purified Hb solution, with a Kd ≅300 µM. Fluorescence- and HPLC-based assays concordantly showed that APX binds to Hb with a Kd ≅350 µM. Finally, docking simulations showed that APX can fit into in the central cavity of Hb. These findings support the hypothesis that APX does bind to Hb, which, due to its millimolar concentration in blood, can act as 'buffer' for the drug and consequently affect its free plasma level.
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Affiliation(s)
- Monica Sacco
- Institute of Internal Medicine & Geriatrics, Haemostasis and Thrombosis Center, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Area of Hematology, Catholic University of the Sacred Heart School of Medicine, Rome, Italy
| | - Stefano Lancellotti
- Institute of Internal Medicine & Geriatrics, Haemostasis and Thrombosis Center, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Area of Hematology, Catholic University of the Sacred Heart School of Medicine, Rome, Italy
| | - Federico Berruti
- Institute of Internal Medicine & Geriatrics, Haemostasis and Thrombosis Center, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Area of Hematology, Catholic University of the Sacred Heart School of Medicine, Rome, Italy
| | - Alessandro Arcovito
- Institute of Biochemistry and Clinical Biochemistry, Catholic University of Sacred Heart, Rome, Italy
| | - Andrea Bellelli
- Department of Biochemical Sciences "A. Rossi Fanelli," Sapienza University of Rome, Rome, Italy
| | - Tiziana Ricciardelli
- KAUST Catalysis Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia.,Department of Sciences and Technologies, Parthenope University of Naples, Naples, Italy
| | - Ida Autiero
- KAUST Catalysis Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Luigi Cavallo
- KAUST Catalysis Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Romina Oliva
- Department of Sciences and Technologies, Parthenope University of Naples, Naples, Italy
| | - Raimondo De Cristofaro
- Institute of Internal Medicine & Geriatrics, Haemostasis and Thrombosis Center, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Area of Hematology, Catholic University of the Sacred Heart School of Medicine, Rome, Italy
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18
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Lancellotti S, Basso M, Veca V, Sacco M, Riccardi L, Pompili M, De Cristofaro R. Presence of portal vein thrombosis in liver cirrhosis is strongly associated with low levels of ADAMTS-13: a pilot study. Intern Emerg Med 2016; 11:959-67. [PMID: 27220954 DOI: 10.1007/s11739-016-1467-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Accepted: 05/13/2016] [Indexed: 02/07/2023]
Abstract
Portal vein thrombosis (PVT) dramatically changes the prognosis of cirrhotic patients, especially those waiting for liver transplantation. However, the possible contribution to PVT of von Willebrand factor (VWF) and ADAMTS-13 is poorly documented. The aim of our study was to assess the presence of alterations of VWF and ADAMTS-13 serum levels in cirrhotic patients with PVT. Twenty-four patients with PVT (group PVT) and 60 without PVT (group without PVT) were enrolled. A comprehensive analysis of biochemical and hemostatic parameters was performed. ADAMTS-13 activity was significantly lower in group A (median 16.8 vs. 69.1 %, p = 0.0047). Group PVT, compared to group without PVT, showed a significantly higher VWF:act, (median 308.4 vs 203.3 %, p = 0.032), whereas no difference was observed for VWF:Ag, FVIII level and the presence of risk factors for venous thromboembolism. No correlation was found between the Child-Pugh score and ADAMTS-13 activity. In multivariable logistic regression analysis performed on data concerning both group PVT and without PVT, only the ADAMTS-13 activity (p = 0.007) was independently and inversely associated with PVT. In conclusion, ADAMTS-13 activity is independently associated with PVT in cirrhotic patients.
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Affiliation(s)
- Stefano Lancellotti
- Department of Oncology and Haematology, Institute of Internal Medicine and Geriatrics, Center for Hemorrhagic and Thrombotic Diseases and Haemophilia Center, "A. Gemelli" Hospital, Catholic University School of Medicine, Largo A. Gemelli, 00168, Rome, Italy
| | - Maria Basso
- Department of Oncology and Haematology, Institute of Internal Medicine and Geriatrics, Center for Hemorrhagic and Thrombotic Diseases and Haemophilia Center, "A. Gemelli" Hospital, Catholic University School of Medicine, Largo A. Gemelli, 00168, Rome, Italy
| | - Vito Veca
- Department of Oncology and Haematology, Institute of Internal Medicine and Geriatrics, Center for Hemorrhagic and Thrombotic Diseases and Haemophilia Center, "A. Gemelli" Hospital, Catholic University School of Medicine, Largo A. Gemelli, 00168, Rome, Italy
| | - Monica Sacco
- Department of Oncology and Haematology, Institute of Internal Medicine and Geriatrics, Center for Hemorrhagic and Thrombotic Diseases and Haemophilia Center, "A. Gemelli" Hospital, Catholic University School of Medicine, Largo A. Gemelli, 00168, Rome, Italy
| | - Laura Riccardi
- Department of Digestive, Endocrine and Metabolic System, Institute of Internal Medicine and Geriatrics, "A. Gemelli" Hospital, Catholic University School of Medicine, Rome, Italy
| | - Maurizio Pompili
- Department of Digestive, Endocrine and Metabolic System, Institute of Internal Medicine and Geriatrics, "A. Gemelli" Hospital, Catholic University School of Medicine, Rome, Italy
| | - Raimondo De Cristofaro
- Department of Oncology and Haematology, Institute of Internal Medicine and Geriatrics, Center for Hemorrhagic and Thrombotic Diseases and Haemophilia Center, "A. Gemelli" Hospital, Catholic University School of Medicine, Largo A. Gemelli, 00168, Rome, Italy.
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Lancellotti S, Peyvandi F, Pagliari MT, Cairo A, Abdel-Azeim S, Chermak E, Lazzareschi I, Mastrangelo S, Cavallo L, Oliva R, De Cristofaro R. The D173G mutation in ADAMTS-13 causes a severe form of congenital thrombotic thrombocytopenic purpura. A clinical, biochemical and in silico study. Thromb Haemost 2015; 115:51-62. [PMID: 26272487 DOI: 10.1160/th15-02-0119] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 06/28/2015] [Indexed: 01/24/2023]
Abstract
Congenital thrombotic thrombocytopenic purpura (TTP) is a rare form of thrombotic microangiopathy, inherited with autosomal recessive mode as a dysfunction or severe deficiency of ADAMTS-13 (A Disintegrin And Metalloprotease with ThromboSpondin 1 repeats Nr. 13), caused by mutations in the ADAMTS-13 gene. About 100 mutations of the ADAMTS-13 gene were identified so far, although only a few characterised by in vitro expression studies. A new Asp to Gly homozygous mutation at position 173 of ADAMTS-13 sequence was identified in a family of Romanian origin, with some members affected by clinical signs of TTP. In two male sons, this mutation caused a severe (< 3%) deficiency of ADAMTS-13 activity and antigen level, associated with periodic thrombocytopenia, haemolytic anaemia and mild mental confusion. Both parents, who are cousins, showed the same mutation in heterozygous form. Expression studies of the mutant ADAMTS-13, performed in HEK293 cells, showed a severe decrease of the enzyme's activity and secretion, although the protease was detected inside the cells. Molecular dynamics found that in the D173G mutant the interface area between the metalloprotease domain and the disintegrin-like domain significantly decreases during the simulations, while the proline-rich 20 residues linker region (LR, 285-304) between them undergoes extensive conformational changes. Inter-domain contacts are also significantly less conserved in the mutant compared to the wild-type. Both a decrease of the inter-domain contacts along with a substantial conformational rearrangement of LR interfere with the proper maturation and folding of the mutant ADAMTS-13, thus impairing its secretion.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Raimondo De Cristofaro
- Raimondo De Cristofaro, Hemostasis Research Center - Internal Medicine, Largo F. Vito 1, Roma 00168, Italy, Tel.: +39 06 30154438, Fax: +39 06 30155915, E-mail:
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20
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Lancellotti S, Dragani A, Ranalli P, Petrucci G, Basso M, Tartaglione R, Rocca B, De Cristofaro R. Qualitative and quantitative modifications of von Willebrand factor in patients with essential thrombocythemia and controlled platelet count. J Thromb Haemost 2015; 13:1226-37. [PMID: 25876231 DOI: 10.1111/jth.12967] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Indexed: 12/23/2022]
Abstract
BACKGROUND Essential thrombocythemia (ET) is characterized by increased platelets and prevalent thrombosis. An acquired von Willebrand factor (VWF) disease has been hypothesized and inconsistently associated with extreme thrombocytosis or rare bleeding in ET. Whether VWF is modified in ET patients with controlled platelet count remains unclear. OBJECTIVES We studied different VWF- and platelet-associated parameters in ET patients treated according to current recommendations. PATIENTS/METHODS Sixty-nine ET patients (M = 29; median age, 62 [48-70] years; platelets, 432 [337-620] × 10(3) μL(-1) ), 69 matched controls and 10 subjects with reactive thrombocytosis (RT) were studied. VWF:antigen (Ag), activity (act), electrophoretic patterns, VWF:propeptide, plasma glycocalycin (GC), glycoproteinV (GpV), ADAMTS-13, elastase, C-reactive protein and serum thromboxane (TX)B2 were measured. RESULTS In ET patients, VWF:Ag was increased by 31 ± 13% vs. controls (P < 0.01), without dependence of blood groups, while VWF:act was reduced by 21 ± 12% vs. controls and by 50 ± 24% vs. RT (P < 0.01). The VWF:act/VWF:Ag ratios in ET were reduced by 35 ± 17% vs. controls and RT patients (P < 0.001) and significantly associated with: immature or total platelet counts, GC, GpV and TXB2 . In multivariable analysis, only GC inversely predicted ET patients' VWF:act/VWF:Ag ratios (β = -0.42, P = 0.01). By electrophoresis analyses, high-molecular-weight VWF multimers were variably reduced with atypical cleavage bands in ET only. VWF:propeptide, ADAMTS-13 and elastase levels were normal in ET patients. Platelet-associated ADAM-10 and ADAM-17 hydrolyzed VWFm in vitro, showing patterns similar to those in ET samples. CONCLUSIONS In ET patients with controlled platelet counts, the VWF:act/VWF:Ag ratio is decreased and predicted by GC, a product of platelet activation. ADAM-10 and/or ADAM-17 might be involved. In vivo platelet activation, which characterizes ET, might contribute to disease-specific VWF alterations.
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Affiliation(s)
- S Lancellotti
- Center for Haemorrhagic and Thrombotic Diseases, Department of Medical Sciences, Catholic University School of Medicine, 'A. Gemelli' Hospital, Rome, Italy
| | - A Dragani
- Center for Haemorrhagic, Thrombotic and Rare Hematologic Diseases, Spirito Santo Hospital, Pescara, Italy
| | - P Ranalli
- Center for Haemorrhagic, Thrombotic and Rare Hematologic Diseases, Spirito Santo Hospital, Pescara, Italy
| | - G Petrucci
- Institute of Pharmacology, Catholic University School of Medicine, Rome, Italy
| | - M Basso
- Center for Haemorrhagic and Thrombotic Diseases, Department of Medical Sciences, Catholic University School of Medicine, 'A. Gemelli' Hospital, Rome, Italy
| | - R Tartaglione
- Institute of Haematology, Complesso Integrato Columbus, Catholic University School of Medicine, Rome, Italy
| | - B Rocca
- Institute of Pharmacology, Catholic University School of Medicine, Rome, Italy
| | - R De Cristofaro
- Center for Haemorrhagic and Thrombotic Diseases, Department of Medical Sciences, Catholic University School of Medicine, 'A. Gemelli' Hospital, Rome, Italy
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21
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Bugli F, Paroni Sterbini F, Cacaci M, Martini C, Lancellotti S, Stigliano E, Torelli R, Arena V, Caira M, Posteraro P, Sanguinetti M, Posteraro B. Increased production of gliotoxin is related to the formation of biofilm by Aspergillus fumigatus: an immunological approach. Pathog Dis 2014; 70:379-89. [PMID: 24623580 DOI: 10.1111/2049-632x.12152] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 01/05/2014] [Accepted: 02/03/2014] [Indexed: 11/28/2022] Open
Abstract
Gliotoxin (GT) belongs to the epipolythiodioxopiperazine class of toxins secreted from certain fungi including Aspergillus fumigatus, which is the most prolific producer of this secondary metabolite. Recently, enhanced amounts of GT were found in in vitro biofilm-grown A. fumigatus mycelium. To further correlate the A. fumigatus biofilm growth phenotype with the enhanced secretion of GT, a polyclonal antibody (pAb) was produced by immunizing mice against GT. By an indirect immunofluorescent assay, pAb was then able to recognize specifically GT onto A. fumigatus Af293 biofilm formed on human pulmonary epithelial cells. Then, treating Af293 biofilms with a compound which reduces the GT disulfide bonds provoked shutdown of the GT-specific immunofluorescence (IF) signals along the hyphae. To explore the potential of GT for diagnostic use, pAb was shown to react with GT on hyphae into Aspergillus culture-positive respiratory tract specimens from patients with probable invasive aspergillosis (IA) and into tissue specimens from the lungs of patients with proven IA. As the presence of fungal hyphae in clinical specimens strongly indicates the in vivo A. fumigatus growth as a biofilm, anti-GT antibodies could be a specific and sensitive diagnostic tool for detecting A. fumigatus biofilm-associated clinical infections.
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Affiliation(s)
- Francesca Bugli
- Institute of Microbiology, Università Cattolica del Sacro Cuore, Rome, Italy
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22
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Scaglione GL, Lancellotti S, Papi M, De Spirito M, Maiorana A, Baronciani L, Pagliari MT, Arcovito A, Di Stasio E, Peyvandi F, De Cristofaro R. The type 2B p.R1306W natural mutation of von Willebrand factor dramatically enhances the multimer sensitivity to shear stress. J Thromb Haemost 2013; 11:1688-98. [PMID: 23819767 DOI: 10.1111/jth.12346] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Indexed: 11/26/2022]
Abstract
BACKGROUND Shear stress triggers conformational stretching of von Willebrand factor (VWF), which is responsible for its self-association and binding to the platelet receptor glycoprotein (GP)Ibα. This phenomenon supports primary hemostasis under flow. Type 2B VWF natural mutants are considered to have increased affinity for platelet GPIbα. OBJECTIVES To assess the mechanism responsible for the enhanced interaction of the p.R1306W VWF mutant with the platelet receptor. METHODS The interaction of GPIbα with wild-type (WT) and p.R1306W VWF multimers and A1-A2-A3 constructs was investigated with surface plasmon resonance spectroscopy. Analysis of the static VWF conformation in solution was performed with dynamic light scattering spectroscopy. The shear stress-induced self-association of VWF multimers was investigated with atomic force microscopy (AFM) over a 0-60 dyn cm(-2) range. RESULTS WT VWF did not interact with GPIbα under static conditions, whereas the mutant at ~ 2 μg mL(-1) already bound to the receptor. By contrast, the WT and p.R1306W-A1-A2-A3 constructs showed comparable affinities for GPIbα (Kd ~ 20 nm). The hydrodynamic diameter of resting R1306W VWF multimers was significantly greater than that of the wild type (210 ± 60 nm vs. 87 ± 22 nm). At shear forces of < 14 dyn cm(-2) , the p.R1306W multimers rapidly changed conformation, entering a regime of self-aggregation, which, in contrast, was induced for WT VWF by shear forces of > 30 dyn cm(-2) . Mechanical stretching AFM experiments showed that p.R1306W multimers needed less energy per length unit (~ 10 pN) to be stretched than the WT protein. CONCLUSIONS The increased affinity of p.R1306W VWF for GPIbα arises mostly from higher sensitivity to shear stress, which facilitates exposure of GPIbα binding sites.
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Affiliation(s)
- G L Scaglione
- Istituto di Medicina Interna e Geriatria, Servizio Malattie Emorragiche e Trombotiche, Facoltà di Medicina e Chirurgia, Università Cattolica S. Cuore, Roma, Italy
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Abstract
Prothrombin (factor II [FII]) deficiency is a rare inherited coagulation disorder, having a prevalence of approximately 1 in 2,000,000. Two phenotypes can be distinguished: (1) true hypoprothrombinemia (type I deficiency), characterized by concomitantly low levels of the zymogen antigen; and (2) dysprothrombinemia (type II deficiency), characterized by the normal or near-normal synthesis of a dysfunctional protein. In the latter case, recent studies showed that particular mutations in the catalytic domain of active thrombin can even impair the enzyme interaction with antithrombin, favoring thromboembolic diseases. In some cases, hypoprothrombinemia associated with dysprothrombinemia was also described in compound heterozygous defects. Prothrombin is essential for the development of mammalian organisms. No living patient with undetectable plasma prothrombin has been reported to date. Prothrombin is encoded by a ≈21 kb gene located on chromosome 11 and containing 14 exons. Thirty-nine different mutations have been identified and characterized in prothrombin deficiency. Many of these are present in the catalytic site, whereas some involve regulatory domains, such as the anion-binding exosite I, the Na+-binding loop, and the light A-chain. Most hypoprothrombinemia-associated mutations are missense, but nonsense mutations leading to stop codons and one single nucleotide deletion have also been identified. Finally, recent developments in the therapy of congenital prothrombin deficiency are presented and discussed.
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Affiliation(s)
- Stefano Lancellotti
- Department of Medical Sciences, Haemostasis and Thrombosis Service, Catholic University School of Medicine, Rome, Italy
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Oggianu L, Lancellotti S, Pitocco D, Zaccardi F, Rizzo P, Martini F, Ghirlanda G, De Cristofaro R. The oxidative modification of von Willebrand factor is associated with thrombotic angiopathies in diabetes mellitus. PLoS One 2013; 8:e55396. [PMID: 23383177 PMCID: PMC3561310 DOI: 10.1371/journal.pone.0055396] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [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: 07/31/2012] [Accepted: 12/24/2012] [Indexed: 12/11/2022] Open
Abstract
The thrombogenic activity of Von Willebrand factor (VWF) is proportional to its molecular size and inversely related to its proteolysis by ADAMTS-13. Oxidation of VWF severely impairs its proteolysis by the metalloprotease. This study was aimed at assessing in patients with type 1 and type 2 diabetes whether protein carbonyls, marker of oxidative stress, are associated with both the level and oxidation status of VWF as well as with micro- and macroangiopathic complications. Eighty-three diabetic patients (41 type 1 and 42 type 2 diabetic subjects) and their respective eighty-three healthy controls were studied after verifying the availability, through institutional databases, of clinical biochemistry records spanning at least 3 years. VWF and protein carbonyls were measured by immunoassays, whereas VWF multimers were studied by SDS-agarose gel electrophoresis. Type 2 diabetic subjects had higher levels of VWF antigen (VWF:ag), VWF activity (VWF:act) and plasma proteins’ carbonyls compared to both their controls and type 1 diabetic subjects. Moreover, high molecular weight VWF multimers and specific VWF-bound carbonyls were significantly increased in subjects with micro- and macro-angiopathic complications. In both type 1 and type 2 diabetic subjects, ADAMTS-13 activity was in the normal range. In a multivariable analysis, only VWF-bound carbonyls were significantly associated with any form of thrombotic angiopathy in the entire group of T1- and T2 diabetic patients. These data provide first evidence that not only high VWF levels but also its oxidation status and the presence of high molecular weight VWF multimers that are not observed in SDS-agarose gel electrophoresis of normal subjects are associated with thrombotic angiopathies in diabetes mellitus. These findings may help identify diabetic patients particularly at risk for these complications and elucidate a new pathophysiological mechanism of thrombotic angiopathies in this clinical setting.
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Affiliation(s)
- Laura Oggianu
- Institute of Internal Medicine and Geriatrics and Haemostasis Research Centre, Catholic University School of Medicine, Rome, Italy
- Section of Biology Applied to Human Health, “Rome Tre” University, Rome, Italy
| | - Stefano Lancellotti
- Institute of Internal Medicine and Geriatrics and Haemostasis Research Centre, Catholic University School of Medicine, Rome, Italy
| | - Dario Pitocco
- Diabetes Care Unit, Department of Internal Medicine, Catholic University School of Medicine, Rome, Italy
| | - Francesco Zaccardi
- Diabetes Care Unit, Department of Internal Medicine, Catholic University School of Medicine, Rome, Italy
| | - Paola Rizzo
- Institute of Internal Medicine and Geriatrics and Haemostasis Research Centre, Catholic University School of Medicine, Rome, Italy
- Diabetes Care Unit, Department of Internal Medicine, Catholic University School of Medicine, Rome, Italy
| | - Francesca Martini
- Diabetes Care Unit, Department of Internal Medicine, Catholic University School of Medicine, Rome, Italy
| | - Giovanni Ghirlanda
- Diabetes Care Unit, Department of Internal Medicine, Catholic University School of Medicine, Rome, Italy
| | - Raimondo De Cristofaro
- Institute of Internal Medicine and Geriatrics and Haemostasis Research Centre, Catholic University School of Medicine, Rome, Italy
- * E-mail:
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Lotta LA, Lombardi R, Mariani M, Lancellotti S, De Cristofaro R, Hollestelle MJ, Canciani MT, Mannucci PM, Peyvandi F. Platelet reactive conformation and multimeric pattern of von Willebrand factor in acquired thrombotic thrombocytopenic purpura during acute disease and remission. J Thromb Haemost 2011; 9:1744-51. [PMID: 21726405 DOI: 10.1111/j.1538-7836.2011.04428.x] [Citation(s) in RCA: 20] [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: 11/29/2022]
Abstract
BACKGROUND Binding of von Willebrand factor (VWF) multimers of ultra-large size to platelets is considered the triggering mechanism of microvascular thrombosis in thrombotic thrombocytopenic purpura (TTP). OBJECTIVE To assess the potential of VWF-related measurements as markers of disease activity and severity in TTP. METHODS VWF antigen (VWF:Ag), platelet glycoprotein-Ib-α binding-conformation (GPIb-α/BC) and multimeric pattern were investigated in 74 patients with acquired TTP during acute disease, remission or both and 73 healthy controls. In patients with both acute and remission samples available, VWF ristocetin co-factor activity (VWF:RCo) and collagen binding (VWF:CB) were also measured. The relationships of study measurements with the presence of acute disease and remission and with markers of disease severity were assessed. RESULTS VWF:Ag and VWF-GPIb-α/BC were higher in TTP patients than controls (P < 0.001 and 0.004). However, there was no statistically significant difference in VWF-GPIb-α/BC between samples obtained during acute TTP and remission. Larger VWF multimers were frequently lacking in acute TTP patients, who displayed ultra-large multimers at remission. The degree of loss of larger VWF multimers correlated with the degree of abnormality of hemoglobin, platelet counts and serum lactate dehydrogenase (LDH) and was associated with low levels of both VWF:RCo/Ag and VWF:CB/Ag ratios. CONCLUSIONS In TTP the platelet-binding conformation of VWF is not exclusively present in acute disease, nor is it associated with its clinical and laboratory severity. The loss of larger VWF multimers, accompanied by low VWF:RCo/Ag and VWF:CB/Ag ratio values, represents an index of disease activity and severity of acute TTP in patients with severe ADAMTS-13 deficiency.
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Affiliation(s)
- L A Lotta
- UOS Dipartimentale per la Diagnosi e la Terapia delle Coagulopatie, Angelo Bianchi Bonomi Hemophilia and Thrombosis Centre and Scientific Direction, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Fondazione Luigi Villa, Università degli Studi di Milano, Milan, Italy.
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Lancellotti S, De Filippis V, Pozzi N, Oggianu L, Rutella S, Scaglione GL, Maset F, Peyvandi F, Mannucci PM, De Cristofaro R. Oxidized von Willebrand factor is efficiently cleaved by serine proteases from primary granules of leukocytes: divergence from ADAMTS-13. J Thromb Haemost 2011; 9:1620-7. [PMID: 21605335 DOI: 10.1111/j.1538-7836.2011.04367.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [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: 11/28/2022]
Abstract
BACKGROUND The leukocyte serine proteases (LSPs) elastase, proteinase 3 and cathepsin G cleave von Willebrand factor (VWF) near or at the same cleavage site (Tyr1605-Met1606) as ADAMTS-13, the metalloprotease that specifically controls the proteolytic processing of VWF. Recent studies have shown that oxidation of VWF at Met1606 with formation of methionine sulfoxide (MetSO) severely impairs its proteolysis by ADAMTS-13. METHODS This study was aimed at assessing whether or not oxidation of VWF by reactive oxygen species (ROS) can also affect its cleavage by elastase, proteinase 3, and cathepsin G. In this study, the catalytic specificity of hydrolysis by LSPs of the VWF peptide substrate VWF74 and full-length VWF, both unaltered and in the oxidized form, was measured by RP-HPLC, electrophoretic and mass spectrometry methods. RESULTS LSPs cleaved both VWF multimers and VWF74 near or at the same peptide bond as is cleaved by ADAMTS-13, with k(cat)/K(m) values similar to those of the metalloprotease. However, unlike ADAMTS-13, cathepsin G cleaved VWF74 containing a MetSO residue at position 1606 with a k(cat)/K(m) value higher than that for VWF74, whereas the catalytic efficiencies of both elastase and proteinase 3 were unaffected by the replacement of Met1606 with MetSO. Likewise, oxidation of VWF multimers by hypochlorous acid and ROS, produced by activated leukocytes, improved their hydrolysis by LSPs. CONCLUSIONS Oxidation by leukocyte ROS has a net positive effect on the cleavage of VWF multimers by LSPs, under conditions where high concentrations of oxidant species would severely reduce the proteolytic efficiency of ADAMTS-13.
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Affiliation(s)
- S Lancellotti
- Institute of Internal Medicine and Geriatrics, and Hemostasis Research Center, Catholic University School of Medicine, Rome, Italy
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Lancellotti S, De Cristofaro R. Structure and proteolytic properties of ADAMTS13, a metalloprotease involved in the pathogenesis of thrombotic microangiopathies. Prog Mol Biol Transl Sci 2011; 99:105-44. [PMID: 21238935 DOI: 10.1016/b978-0-12-385504-6.00003-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
ADAMTS13 is a 190-kDa zinc protease encoded by a gene located on chromosome 9q34. This protease specifically hydrolyzes von Willebrand factor (VWF) multimers, thus causing VWF size reduction. ADAMTS13 belongs to the A Disintegrin And Metalloprotease with ThromboSpondin type 1 repeats (ADAMTS) family, involved in proteolytic processing of many matrix proteins. ADAMTS13 consists of numerous domains, including a metalloprotease domain, a disintegrin domain, several thrombospondin type 1 (TSP1) repeats, a cysteine-rich domain, a spacer domain, and two CUB (Complement c1r/c1s, sea Urchin epidermal growth factor, and Bone morphogenetic protein) domains. ADAMTS13 cleaves a single peptide bond (Tyr(1605)-Met(1606)) in the central A2 domain of the VWF molecule. This proteolytic cleavage is essential to reduce the size of ultralarge VWF polymers, which, when exposed to high shear stress in the microcirculation, are prone to form platelets clumps, which cause severe syndromes called thrombotic microangiopathies (TMAs). In this chapter, we (a) discuss the current knowledge of structure-function aspects of ADAMTS13 and its involvement in the pathogenesis of TMAs, (b) address the ongoing controversies, and (c) indicate the direction of future investigations.
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Affiliation(s)
- Stefano Lancellotti
- Institute of Internal Medicine and Geriatrics, Physiopathology of Haemostasis Research Center, Catholic University School of Medicine, Rome, Italy
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Lancellotti S, Novarese L, De Cristofaro R. Biochemical Properties of Indoleamine 2,3-dioxygenase: From Structure to Optimized Design of Inhibitors. Curr Med Chem 2011; 18:2205-14. [DOI: 10.2174/092986711795656108] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Accepted: 04/18/2011] [Indexed: 11/22/2022]
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Scaldaferri F, Lancellotti S, Pizzoferrato M, Cristofaro RD. Haemostatic system in inflammatory bowel diseases: New players in gut inflammation. World J Gastroenterol 2011; 17:594-608. [PMID: 21350708 PMCID: PMC3040331 DOI: 10.3748/wjg.v17.i5.594] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2010] [Revised: 03/25/2010] [Accepted: 04/01/2010] [Indexed: 02/06/2023] Open
Abstract
Inflammation and coagulation constantly influence each other and are constantly in balance. Emerging evidence supports this statement in acute inflammatory diseases, such as sepsis, but it also seems to be very important in chronic inflammatory settings, such as inflammatory bowel disease (IBD). Patients with Crohn’s disease and ulcerative colitis have an increased risk of thromboembolic events, and several abnormalities concerning coagulation components occur in the endothelial cells of intestinal vessels, where most severe inflammatory abnormalities occur. The aims of this review are to update and classify the type of coagulation system abnormalities in IBD, and analyze the strict and delicate balance between coagulation and inflammation at the mucosal level. Recent studies on possible therapeutic applications arising from investigations on coagulation abnormalities associated with IBD pathogenesis will also be briefly presented and critically reviewed.
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Petrucci G, De Cristofaro R, Rutella S, Ranelletti FO, Pocaterra D, Lancellotti S, Habib A, Patrono C, Rocca B. Prostaglandin E2 differentially modulates human platelet function through the prostanoid EP2 and EP3 receptors. J Pharmacol Exp Ther 2010; 336:391-402. [PMID: 21059804 DOI: 10.1124/jpet.110.174821] [Citation(s) in RCA: 38] [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] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Activated human platelets synthesize prostaglandin (PG) E(2), although at lower rate than thromboxane A(2). PGE(2) acts through different receptors (EP1-4), but its role in human platelet function remains poorly characterized compared with thromboxane. We studied the effect of PGE(2) and its analogs on in vitro human platelet function and platelet and megakaryocyte EP expression. Platelets preincubated with PGE(2) or its analogs were stimulated with agonists and studied by optical aggregometry. Intraplatelet calcium mobilization was investigated by the stopped flow method; platelet vasodilator-stimulated phosphoprotein (VASP), P-selectin, and microaggregates were investigated by flow cytometry. PGE(2) at nanomolar concentrations dose-dependently increased the slope (velocity) of the secondary phase of ADP-induced platelet aggregation (EC(50), 25.6 ± 6 nM; E(max) of 100 ± 19% increase versus vehicle-treated), without affecting final maximal aggregation. PGE(2) stabilized reversible aggregation induced by low ADP concentrations (EC(50), 37.7 ± 9 nM). The EP3 agonists, 11-deoxy-16,16-dimethyl PGE(2) (11d-16dm PGE(2)) and sulprostone enhanced the secondary wave of ADP-induced aggregation, with EC(50) of 48.6 ± 10 nM (E(max), 252 ± 51%) and 5 ± 2 nM (E(max), 300 ± 35%), respectively. The EP2 agonist butaprost inhibited ADP-induced secondary phase slopes (IC(50), 40 ± 20 nM). EP4 stimulation had minor inhibitory effects. 11d-16dm PGE(2) alone raised intraplatelet Ca(2+) and enhanced ADP-induced Ca(2+) increase. 11d-16dm PGE(2) and 17-phenyltrinor PGE(2) (EP3 > EP1 agonist) at nanomolar concentrations counteracted PGE(1)-induced VASP phosphorylation and induced platelet microaggregates and P-selectin expression. EP1, EP2, EP3, and EP4 were expressed on human platelets and megakaryocytes. PGE(2) through different EPs finely modulates human platelet responsiveness. These findings should inform the rational selection of novel antithrombotic strategies based on EP modulation.
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Affiliation(s)
- Giovanna Petrucci
- Department of Pharmacology, Catholic University School of Medicine, Largo Francesco Vito 1, 00168 Rome, Italy
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Papi M, Maulucci G, De Spirito M, Missori M, Arcovito G, Lancellotti S, Di Stasio E, De Cristofaro R, Arcovito A. Ristocetin-induced self-aggregation of von Willebrand factor. Eur Biophys J 2010; 39:1597-603. [DOI: 10.1007/s00249-010-0617-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2010] [Revised: 05/10/2010] [Accepted: 06/15/2010] [Indexed: 12/21/2022]
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Mattoscio D, Evangelista V, De Cristofaro R, Recchiuti A, Pandolfi A, Di Silvestre S, Manarini S, Martelli N, Rocca B, Petrucci G, Angelini DF, Battistini L, Robuffo I, Pensabene T, Pieroni L, Furnari ML, Pardo F, Quattrucci S, Lancellotti S, Davì G, Romano M. Cystic fibrosis transmembrane conductance regulator (CFTR) expression in human platelets: impact on mediators and mechanisms of the inflammatory response. FASEB J 2010; 24:3970-80. [PMID: 20530751 DOI: 10.1096/fj.10-159921] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Inflammatory lung disease is a primary cause of morbidity and mortality in cystic fibrosis (CF). Mechanisms of unresolved acute inflammation in CF are not completely known, although the involvement of cystic fibrosis transmembrane conductance regulator (CFTR) in nonrespiratory cells is emerging. Here we examined CFTR expression and function in human platelets (PLTs) and found that they express a biologically active CFTR. CFTR blockade gave an ∼50% reduction in lipoxin A(4) (LXA(4)) formation during PLT/polymorphonuclear leukocytes (PMN) coincubations by inhibiting the lipoxin synthase activity of PLT 12-lipoxygenase. PLTs from CF patients generated ∼40% less LXA(4) compared to healthy subject PLTs. CFTR inhibition increased PLT-dependent PMN viability (33.0±5.7 vs. 61.2±8.2%; P=0.033), suppressed nitric oxide generation (0.23±0.04 vs. 0.11±0.002 pmol/10(8) PLTs; P=0.004), while reducing AKT (1.02±0.12 vs. 0.71±0.007 U; P=0.04), and increasing p38 MAPK phosphorylation (0.650±0.09 vs. 1.04±0.24 U; P=0.03). Taken together, these findings indicate that PLTs from CF patients are affected by the molecular defect of CFTR. Moreover, this CF PLT abnormality may explain the failure of resolution in CF.
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Affiliation(s)
- Domenico Mattoscio
- Department of Biomedical Sciences, Aging Research Center, CeSI, Gabriele D'Annunzio University Foundation, Via Colle dell'Ara, 66013 Chieti, Italy
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Biscetti F, Straface G, De Cristofaro R, Lancellotti S, Rizzo P, Arena V, Stigliano E, Pecorini G, Egashira K, De Angelis G, Ghirlanda G, Flex A. High-mobility group box-1 protein promotes angiogenesis after peripheral ischemia in diabetic mice through a VEGF-dependent mechanism. Diabetes 2010; 59:1496-505. [PMID: 20200317 PMCID: PMC2874711 DOI: 10.2337/db09-1507] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE High-mobility group box-1 (HMGB1) protein is a nuclear DNA-binding protein released from necrotic cells, inducing inflammatory responses and promoting tissue repair and angiogenesis. Diabetic human and mouse tissues contain lower levels of HMGB1 than their normoglycemic counterparts. Deficient angiogenesis after ischemia contributes to worse outcomes of peripheral arterial disease in patients with diabetes. To test the hypothesis that HMGB1 enhances ischemia-induced angiogenesis in diabetes, we administered HMGB1 protein in a mouse hind limb ischemia model using diabetic mice. RESEARCH DESIGN AND METHODS After the induction of diabetes by streptozotocin, we studied ischemia-induced neovascularization in the ischemic hind limb of normoglycemic, diabetic, and HMGB1-treated diabetic mice. RESULTS We found that the perfusion recovery was significantly attenuated in diabetic mice compared with normoglycemic control mice. Interestingly, HMGB1 protein expression was lower in the ischemic tissue of diabetic mice than in normoglycemic mice. Furthermore, we observed that HMGB1 administration restored the blood flow recovery and capillary density in the ischemic muscle of diabetic mice, that this process was associated with the increased expression of vascular endothelial growth factor (VEGF), and that HMGB1-induced angiogenesis was significantly reduced by inhibiting VEGF activity. CONCLUSIONS The results of this study show that endogenous HMGB1 is crucial for ischemia-induced angiogenesis in diabetic mice and that HMGB1 protein administration enhances collateral blood flow in the ischemic hind limbs of diabetic mice through a VEGF-dependent mechanism.
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Affiliation(s)
- Federico Biscetti
- Laboratory of Vascular Biology and Genetics, Department of Medicine, A. Gemelli University Hospital, Catholic University School of Medicine, Rome, Italy.
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Lancellotti S, De Filippis V, Pozzi N, Peyvandi F, Palla R, Rocca B, Rutella S, Pitocco D, Mannucci PM, De Cristofaro R. Formation of methionine sulfoxide by peroxynitrite at position 1606 of von Willebrand factor inhibits its cleavage by ADAMTS-13: A new prothrombotic mechanism in diseases associated with oxidative stress. Free Radic Biol Med 2010; 48:446-56. [PMID: 19969076 DOI: 10.1016/j.freeradbiomed.2009.11.020] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Revised: 11/12/2009] [Accepted: 11/23/2009] [Indexed: 12/11/2022]
Abstract
An enhanced formation of reactive oxygen species and peroxynitrite occurs in several clinical settings including diabetes, coronary artery disease, stroke, sepsis, and chronic inflammatory diseases. Peroxynitrite oxidizes methionine and tyrosine residues to methionine sulfoxide (MetSO) and 3-nitrotyrosine (NT), respectively. Notably, ADAMTS-13 cleaves von Willebrand factor (VWF) exclusively at the Tyr1605-Met1606 peptide bond in the A2 domain. We hypothesized that peroxynitrite could oxidize either or both of these amino acid residues, thus potentially affecting ADAMTS-13-mediated cleavage. We tested our hypothesis using synthetic peptide substrates based on: (1) VWF Asp1596-Ala1669 sequence (VWF74) and (2) VWF Asp1596-Ala1669 sequence containing nitrotyrosine (VWF74-NT) or methionine sulfoxide (VWF74-MetSO) at position 1605 or 1606, respectively. The peptides were treated with recombinant ADAMTS-13 and the cleavage products analyzed by RP-HPLC. VWF74 oxidized by peroxynitrite underwent a severe impairment of its hydrolysis. Likewise, VWF74-MetSO was minimally hydrolyzed, whereas VWF74-NT was hydrolyzed slightly more efficiently than VWF74. Oxidation by peroxynitrite of purified VWF multimers inhibited ADAMTS-13 hydrolysis, but did not alter their electrophoretic pattern nor their ability to induce platelet agglutination by ristocetin. Moreover, VWF purified from type 2 diabetic patients showed oxidative damage, as revealed by enhanced carbonyl, NT, and MetSO content and was partially resistant to ADAMTS-13 hydrolysis. In conclusion, peroxynitrite may contribute to prothrombotic effects, hindering the proteolytic processing by ADAMTS-13 of high-molecular-weight VWF multimers, which have the highest ability to bind and activate platelets in the microcirculation.
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Affiliation(s)
- Stefano Lancellotti
- Institute of Internal Medicine and Geriatrics and Hemostasis Research Center, Catholic University School of Medicine, 00168 Rome, Italy
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Baronciani L, Peyvandi F, Punzo M, Lancellotti S, Canciani MT, Federici AB, de Cristofaro R. Relevance of chloride binding to von Willebrand factor in type 2B von Willebrand disease patients. J Thromb Haemost 2010; 8:416-8. [PMID: 19943880 DOI: 10.1111/j.1538-7836.2009.03706.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Zocco MA, Di Stasio E, De Cristofaro R, Novi M, Ainora ME, Ponziani F, Riccardi L, Lancellotti S, Santoliquido A, Flore R, Pompili M, Rapaccini GL, Tondi P, Gasbarrini GB, Landolfi R, Gasbarrini A. Thrombotic risk factors in patients with liver cirrhosis: correlation with MELD scoring system and portal vein thrombosis development. J Hepatol 2009; 51:682-9. [PMID: 19464747 DOI: 10.1016/j.jhep.2009.03.013] [Citation(s) in RCA: 337] [Impact Index Per Article: 22.5] [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: 10/09/2008] [Revised: 02/19/2009] [Accepted: 03/17/2009] [Indexed: 02/06/2023]
Abstract
BACKGROUND/AIMS Prognostic scores currently used in cirrhotic patients do not include thrombotic risk factors (TRFs). Predicting factors of portal vein thrombosis (PVT) development are still unknown. We wanted to describe TRFs as a function of liver disease severity using the MELD score and assess the role of local and systemic TRFs as predictors of PVT development in cirrhotic patients. METHODS One hundred consecutive patients with liver cirrhosis were included in the study. TRFs, D-dimers, MELD score, portal vein patency and flow velocity were evaluated in all subjects at baseline and every 6 months thereafter. Variables able to predict PVT development within 1 year were identified by means of multiple logistic regression. RESULTS The plasma levels of protein C and antithrombin were lower and the concentration of D-dimers was higher in patients with advanced disease. Plasma levels of antithrombin, protein C and protein S resulted significantly lower in PVT group at univariate analysis, but reduced portal vein flow velocity was the only variable independently associated with PVT development. CONCLUSIONS Lower concentrations of natural coagulation inhibitors are frequently detected in patients with liver cirrhosis. A reduced portal flow velocity seems to be the most important predictive variable for PVT development in patients with cirrhosis.
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Affiliation(s)
- Maria Assunta Zocco
- Department of Internal Medicine, Catholic University of Rome, Gemelli Hospital, Largo A. Gemelli 8, 00168 Rome, Italy.
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Abstract
OBJECTIVE The aim of the study was to evaluate the effects of an intensive rehabilitation programme on thyroid metabolism, the relationship between disability and thyroid hormone level, and the occurrence of nonthyroidal illness syndrome (NTIS) before and after rehabilitation. DESIGN, SUBJECTS AND MEASUREMENTS This was a clinical prospective study. Orthopaedic surgery patients (n = 82) were classified into two groups: patients in whom early active mobilization and walking were possible (walking group, WG, n = 45), and patients in whom these were not recommended (nonwalking group, NWG, n = 37). Levels of free T3 (fT3), fT4, TSH and rT3 were measured before and after surgery, and then at 1, 3, 7, 14 and 30 days from the beginning of rehabilitation. Personal, nutritional and clinical data were acquired for all patients. The Barthel Index (BI) was used to assess disability before and after rehabilitation. RESULTS Immediately after surgery, both groups of patients showed a significant decrease in mean fT3 concentrations and a significant increase in rT3; mean fT4 values decreased significantly only in NWG patients. Once rehabilitation had been completed, fT3 and rT3 levels returned to baseline values in WG patients. In NWG patients mean fT3 and fT4 levels continued to decrease significantly and rT3 values remained significantly high until the end of rehabilitation. NTIS occurred in 38% of the NWG patients. No significant changes in TSH levels were observed in either group. Finally, we observed a direct correlation between fT3 levels and the BI in WG patients. CONCLUSIONS Our data suggest that early patient mobilization and physical activity during an active and intensive rehabilitation programme induce recovery of thyroid function and avoid occurrence of NTIS.
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Affiliation(s)
- Irene Aprile
- Fondazione Don Carlo Gnocchi Centro S Maria della Pace, Rome, Italy.
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Abstract
Aptamer molecules represent an attractive approach in pharmacological therapy. Thrombin is a plasma serine protease that plays a key role in coagulation and haemostasis, also playing a relevant role in endothelial and smooth muscle cell functions. Thus, the development and use of direct thrombin inhibitors represents a potent tool in cardiovascular therapeutics. This review describes the status of direct thrombin inhibitors, focusing on aptamer-based drug candidates, that are at present in pre-clinical and in clinical trials. In addition, more recent research strategies in the design of novel aptamer thrombin inhibitors are presented and discussed. In particular, their structural, conformational, pharmacokinetic and pharmacodynamic properties are discussed in relation with the specificity of their binding to relevant thrombin exosites, which regulate the enzyme interaction with natural substrates and cellular receptors. Despite the addition of new effective anticoagulants to the therapeutic armoury, there remains a need for safer and effective anticoagulants. The aptamer-based thrombin inhibitors may represent an attractive approach for future developments of more potent and safer anticoagulants.
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Affiliation(s)
- Stefano Lancellotti
- Dept of Internal Medicine, Haemostasis Research Center, Catholic University School of Medicine, Largo F. Vito 1, Rome, Italy
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Aprile I, Di Stasio E, Romitelli F, Lancellotti S, Caliandro P, Tonali P, Gilardi A, Padua L. Effects of rehabilitation on quality of life in patients with chronic stroke. Brain Inj 2008; 22:451-6. [PMID: 18465386 DOI: 10.1080/02699050802060639] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
PRIMARY OBJECTIVE To evaluate the effects of rehabilitation on disability and quality of life (QoL) in patients with chronic stroke. RESEARCH DESIGN This is an observational, prospective and multidimensional study. METHODS AND PROCEDURES Sixty-six consecutive inpatients were enrolled. A rehabilitation programme of 2 months consisting of six exercise periods per week was performed. An impairment of cognitive function was the exclusion criteria for patient enrolment. MAIN OUTCOMES AND RESULTS European Stroke Scale, Barthel Index, Modified Rankin Scale, Deambulation Index and SF-36 were performed both before and after rehabilitation. A short-term follow-up (2 months after discharge) was performed by phone administration of SF-36. Significant improvement in clinical and disability measurements was observed after rehabilitation. For QoL, a significant improvement was observed both in physical function and in social function immediately after rehabilitation. At follow-up the social function improvement was maintained, while physical function improvement was lost. CONCLUSIONS The data show that rehabilitation in patients with chronic stroke lessens disability and improves physical and social function and that repeated cycles of treatment are needed to maintain the level of improvement reached.
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Affiliation(s)
- Irene Aprile
- Fondazione Don Carlo Gnocchi Centro Santa Maria della Pace, Rome, Italy.
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Lancellotti S, Rutella S, De Filippis V, Pozzi N, Rocca B, De Cristofaro R. Fibrinogen-elongated gamma chain inhibits thrombin-induced platelet response, hindering the interaction with different receptors. J Biol Chem 2008; 283:30193-204. [PMID: 18779330 DOI: 10.1074/jbc.m803659200] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The expression of the elongated fibrinogen gamma chain, termed gamma', derives from alternative splicing of mRNA and causes an insertion sequence of 20 amino acids. This insertion domain interacts with the anion-binding exosite (ABE)-II of thrombin. This study investigated whether and how gamma' chain binding to ABE-II affects thrombin interaction with its platelet receptors, i.e. glycoprotein Ibalpha (GpIbalpha), protease-activated receptor (PAR) 1, and PAR4. Both synthetic gamma' peptide and fibrinogen fragment D*, containing the elongated gamma' chain, inhibited thrombin-induced platelet aggregation up to 70%, with IC(50) values of 42+/-3.5 and 0.47+/-0.03 microm, respectively. Solid-phase binding and spectrofluorimetric assays showed that both fragment D* and the synthetic gamma' peptide specifically bind to thrombin ABE-II and competitively inhibit the thrombin binding to GpIbalpha with a mean K(i) approximately 0.5 and approximately 35 microm, respectively. Both these gamma' chain-containing ligands allosterically inhibited thrombin cleavage of a synthetic PAR1 peptide, of native PAR1 molecules on intact platelets, and of the synthetic chromogenic peptide D-Phe-pipecolyl-Arg-p-nitroanilide. PAR4 cleavage was unaffected. In summary, fibrinogen gamma' chain binds with high affinity to thrombin and inhibits with combined mechanisms the platelet response to thrombin. Thus, its variations in vivo may affect the hemostatic balance in arterial circulation.
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Affiliation(s)
- Stefano Lancellotti
- Institute of Internal Medicine and Geriatrics, and Haemostasis Research Centre, Catholic University School of Medicine, 00168 Rome, Italy
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Tarugi P, Di Leo E, Lancellotti S, Fasano T. Mo-W5:3 Molecular diagnosis and treatment of hypobetalipoproteinemia. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)80053-x] [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: 11/24/2022]
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Tarugi P, Lancellotti S, Di Leo E, Calandra S, Cattin L. T04-P-042 Abnormal apo-B messenger RNA splicingin familial hypobetalipoproteinemia. ATHEROSCLEROSIS SUPP 2005. [DOI: 10.1016/s1567-5688(05)80633-6] [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: 10/25/2022]
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Tarugi P, Lancellotti S, di Leo E, Calandra S. W14.392 Familial hypobetalipoproteinemia with no truncated forms of apolipoprotein B detectable in plasma. ATHEROSCLEROSIS SUPP 2004. [DOI: 10.1016/s1567-5688(04)90391-7] [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: 11/17/2022]
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