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Pozzi A, Cirelli C, Merlo A, Rea F, Scangiuzzi C, Tavano E, Iorio A, Kristensen SL, Wong C, Iacovoni A, Corrado G. Adverse effects of sodium-glucose cotransporter-2 inhibitors in patients with heart failure: a systematic review and meta-analysis. Heart Fail Rev 2024; 29:207-217. [PMID: 37917192 DOI: 10.1007/s10741-023-10363-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/11/2023] [Indexed: 11/04/2023]
Abstract
Sodium-glucose cotransoporter-2 inhibitors (SGLT-2Is) improve prognosis in heart failure (HF) patients both with reduced ejection fraction (HFrEF) and preserved ejection fraction (HFpEF). However, these drugs can have some side effects. To estimate the relative risk of side effects in HF patients treated with SGLT-2Is irrespective from left ventricular EF and setting (chronic and non-chronic HF). Five randomized controlled trials (RCTs) enrolling patients with HFrEF, 4 RCTs enrolling non-chronic HF, and 3 RCTs enrolling HFpEF were included. Among side effects, urinary infection, genital infection, acute kidney injury, diabetic ketoacidosis, hypoglycemia, hyperkalemia, hypokalemia, bone fractures, and amputations were considered in the analysis. Overall, 24,055 patients were included in the analysis: 9020 (38%) patients with HFrEF, 12,562 (52%) with HFpEF, and 2473 (10%) with non-chronic HF. There were no differences between SGLT-2Is and placebo in the risk to develop diabetic ketoacidosis, hypoglycemia, hyperkalemia, hypokalemia, bone fractures, and amputations. HFrEF patients treated with SGLT-2Is had a significant reduction of acute kidney injury (RR = 0.54 (95% CI 0.33-0.87), p = 0.011), whereas no differences have been reported in the HFpEF group (RR = 0.94 (95% CI 0.83-1.07), p = 0.348) and non-chronic HF setting (RR = 0.79 (95% CI 0.55-1.15), p = 0.214). A higher risk to develop genital infection (overall 2.57 (95% CI 1.82-3.63), p < 0.001) was found among patients treated with SGLT-2Is irrespective from EF (HFrEF: RR = 1.96 (95% CI 1.17-3.29), p = 0.011; HFpEF: RR = 3.04 (95% CI 1.88-4.90), p < 0.001). The risk to develop urinary infections was increased among SGLT-2I users in the overall population (RR = 1.13 (95% CI 1.00-1.28), p = 0.046) and in the HFpEF setting (RR = 1.19 (95% CI 1.02-1.38), p = 0.029), whereas no differences have been reported in HFrEF (RR = 1.05 (95% CI 0.81-1.36), p = 0.725) and in non-chronic HF setting (RR = 1.04 (95% CI 0.75-1.46), p = 0.806). SGLT-2Is increase the risk of urinary and genital infections in HF patients. In HFpEF patients, the treatment increases the risk of urinary infections compared to placebo, whereas SGLT-2Is reduce the risk of acute kidney disease in patients with HFrEF.
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Affiliation(s)
- A Pozzi
- Cardiology Division, Valduce Hospital, Como, Italy.
| | - C Cirelli
- Cardiology Division, Papa Giovanni XXIII Hospital, Bergamo, Italy
- Milano-Bicocca University, Milan, Italy
| | - A Merlo
- Cardiology Division, Papa Giovanni XXIII Hospital, Bergamo, Italy
- Milano-Bicocca University, Milan, Italy
| | - F Rea
- Department of Statistics and Quantitative Methods, University of Milano-Bicocca, Milan, Italy
| | - C Scangiuzzi
- Cardiology Division, Papa Giovanni XXIII Hospital, Bergamo, Italy
- Milano-Bicocca University, Milan, Italy
| | - E Tavano
- Cardiology Division, Circolo Hospital, Busto Arsizio, Italy
| | - A Iorio
- Cardiology Division, Papa Giovanni XXIII Hospital, Bergamo, Italy
| | - S L Kristensen
- Cardiology Division, Rigshospitalet - Copenhagen University Hospital, Copenhagen, Denmark
| | - C Wong
- Cardiology Division, North Bristol, Bristol, UK
| | - A Iacovoni
- Cardiology Division, Papa Giovanni XXIII Hospital, Bergamo, Italy
| | - G Corrado
- Cardiology Division, Valduce Hospital, Como, Italy
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Pozzi A, Cirelli C, Merlo A, Rea F, Scangiuzzi C, Tavano E, Iorio A, Kristensen SL, Wong C, Iacovoni A, Corrado G. Correction to: Adverse effects of sodium‑glucose cotransporter‑2 inhibitors in patients with heart failure: a systematic review and meta‑analysis. Heart Fail Rev 2024; 29:303. [PMID: 38072892 DOI: 10.1007/s10741-023-10378-3] [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] [Accepted: 12/01/2023] [Indexed: 03/01/2024]
Affiliation(s)
- A Pozzi
- Cardiology Division, Valduce Hospital, Como, Italy.
| | - C Cirelli
- Cardiology Division, Papa Giovanni XXIII Hospital, Bergamo, Italy
- Milano-Bicocca University, Milan, Italy
| | - A Merlo
- Cardiology Division, Papa Giovanni XXIII Hospital, Bergamo, Italy
- Milano-Bicocca University, Milan, Italy
| | - F Rea
- Department of Statistics and Quantitative Methods, University of Milano-Bicocca, Milan, Italy
| | - C Scangiuzzi
- Cardiology Division, Papa Giovanni XXIII Hospital, Bergamo, Italy
- Milano-Bicocca University, Milan, Italy
| | - E Tavano
- Cardiology Division, Circolo Hospital, Busto Arsizio, Italy
| | - A Iorio
- Cardiology Division, Papa Giovanni XXIII Hospital, Bergamo, Italy
| | - S L Kristensen
- Cardiology Division, Rigshospitalet - Copenhagen University Hospital, Copenhagen, Denmark
| | - C Wong
- Cardiology Division, North Bristol, Bristol, UK
| | - A Iacovoni
- Cardiology Division, Papa Giovanni XXIII Hospital, Bergamo, Italy
| | - G Corrado
- Cardiology Division, Valduce Hospital, Como, Italy
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Pozzi A, Abete R, Tavano E, Kristensen SL, Rea F, Iorio A, Iacovoni A, Corrado G, Wong C. Sacubitril/valsartan and arrhythmic burden in patients with heart failure and reduced ejection fraction: a systematic review and meta-analysis. Heart Fail Rev 2023; 28:1395-1403. [PMID: 37380925 DOI: 10.1007/s10741-023-10326-1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/06/2023] [Indexed: 06/30/2023]
Abstract
The aim of this study was to assess whether angiotensin receptor/neprilysin inhibitor (ARNI) decreases ventricular arrhythmic burden compared to angiotensin-converting enzyme inhibitors or angiotensin receptor antagonist (ACE-I/ARB) treatment in chronic heart failure with reduced ejection fraction (HFrEF) patients. Further, we assessed if ARNI influenced the percentage of biventricular pacing. A systematic review of studies (both RCTs and observational studies) including HFrEF patients and those receiving ARNI after ACE-I/ARB treatment was conducted using Medline and Embase up to February 2023. Initial search found 617 articles. After duplicate removal and text check, 1 RCT and 3 non-RCTs with a total of 8837 patients were included in the final analysis. ARNI was associated with a significative reduction of ventricular arrhythmias both in RCT (RR 0.78 (95% CI 0.63-0.96); p = 0.02) and observational studies (RR 0.62; 95% CI 0.53-0.72; p < 0.001). Furthermore, in non-RCTs, ARNI also reduced sustained (RR 0.36 (95% CI 0.2-0.63); p < 0.001), non-sustained VT (RR 0.67 (95% CI 0.57-0.80; p = 0.007), ICD shock (RR 0.24 (95% CI 0.12-0.48; p < 0.001), and increased biventricular pacing (2.96% (95% CI 2.25-3.67), p < 0.001). In patients with chronic HFrEF, switching from ACE-I/ARB to ARNI treatment was associated with a consistent reduction of ventricular arrhythmic burden. This association could be related to a direct pharmacological effect of ARNI on cardiac remodeling.Trial registration: CRD42021257977.
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Affiliation(s)
- A Pozzi
- Cardiology Department, Valduce Hospital, Como, Italy.
| | - R Abete
- Cardiology Department, Papa Giovanni XXIII Hospital, Bergamo, Italy
| | - E Tavano
- Ospedale di Circolo Busto Arsizio, Busto Arsizio, Italy
| | - S L Kristensen
- Cardiology Department, Rigshospitalet University Hospital, Copenhagen, Denmark
| | - F Rea
- Department of Statistics and Quantitative Methods, University of Milano-Bicocca, Milan, Italy
| | - A Iorio
- Cardiology Department, Papa Giovanni XXIII Hospital, Bergamo, Italy
| | - A Iacovoni
- Cardiology Department, Papa Giovanni XXIII Hospital, Bergamo, Italy
| | - G Corrado
- Cardiology Department, Valduce Hospital, Como, Italy
| | - C Wong
- Cardiology Department, Southmead Hospital, Bristol, UK
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Gutbrod A, Longo F, Affentranger R, Ferguson SJ, Pozzi A, Knell SC. Ex vivo biomechanical evaluation of 2.4 mm LCP plate rod constructs versus 2.7 mm LCP applied to the feline tibia. Vet Surg 2023. [PMID: 37818951 DOI: 10.1111/vsu.14038] [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] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 09/07/2023] [Accepted: 09/18/2023] [Indexed: 10/13/2023]
Abstract
OBJECTIVE To compare the stiffness and strength of three plate and rod fixation constructs applied to a feline tibial gap model. STUDY DESIGN Ex vivo study. SAMPLE POPULATION Thirty-three unpaired tibiae obtained from skeletally mature cats. METHODS The tibiae were randomly divided into three groups. The following implants were then applied to the feline tibiae prior to the creation of a 10 mm diaphyseal gap. Group 1: 2.4 mm locking compression plate (LCP) and 1.0 mm intramedullary pin (IMP). Group 2: 2.4 mm LCP and 1.6 mm IMP. Group 3: 2.7 mm LCP. Subsequently, each specimen was tested for torsion, axial compression, and axial load until construct failure. Student's t-tests were used to compare the torsional and axial stiffness, yield load, and maximum axial force. RESULTS Group 2 had higher axial stiffness than group 3 (p = .013). Group 1 showed a lower maximum axial force and yield point than groups 2 and 3 (p < .01; p < .05, respectively). There were no among-group differences in torsional stiffness. CONCLUSION Constructs with a 2.4 mm LCP and 1.6 mm IMP provided the strongest and most rigid constructs in a feline tibia gap model. CLINICAL SIGNIFICANCE A plate-rod construct combining a 2.4 mm LCP and a 1.6 mm IMP is appropriate for achieving high implant stiffness and resisting maximum axial force in treatment of tibial fractures in cats.
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Affiliation(s)
- A Gutbrod
- Tierärztliche Klinik am Hafen, Nürnberg, Germany
- Clinic for Small Animal Surgery, Department for Small Animals, Vetsuisse Faculty University of Zurich, Zurich, Switzerland
| | - F Longo
- Clinic for Small Animal Surgery, Department for Small Animals, Vetsuisse Faculty University of Zurich, Zurich, Switzerland
| | - R Affentranger
- Institue for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - S J Ferguson
- Institue for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - A Pozzi
- Clinic for Small Animal Surgery, Department for Small Animals, Vetsuisse Faculty University of Zurich, Zurich, Switzerland
| | - S C Knell
- Clinic for Small Animal Surgery, Department for Small Animals, Vetsuisse Faculty University of Zurich, Zurich, Switzerland
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Salmina AG, Castelli E, Pozzi A. Treatment of traumatic cranial fracture with sonic activated polymer pins and plates resorbable implants in a dog. SCHWEIZ ARCH TIERH 2023; 165:667-672. [PMID: 37822249 DOI: doi.org/10.17236/sat00408] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
INTRODUCTION The case report describes the use of ultrasound-activated resorbable implants for surgical repair of comminuted cranial fractures in a 10 years old medium sized mix-breed dog being injured from a horse kick.
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Affiliation(s)
- A G Salmina
- Division of Emergency and Critical Care Medicine, Department of Small Animals, Vetsuisse Faculty of the University of Zurich
| | - E Castelli
- Clinic for Small Animal Surgery, Vetsuisse Faculty, University of Zurich
| | - A Pozzi
- Clinic for Small Animal Surgery, Vetsuisse Faculty, University of Zurich
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Bellasi A, Binda G, Pozzi A, Boldrocchi G, Bettinetti R. The extraction of microplastics from sediments: An overview of existing methods and the proposal of a new and green alternative. Chemosphere 2021; 278:130357. [PMID: 33823347 DOI: 10.1016/j.chemosphere.2021.130357] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 03/16/2021] [Accepted: 03/20/2021] [Indexed: 05/21/2023]
Abstract
Microplastics (MPs) contamination is an existing and concerning environmental issue. Plastic particles have been observed worldwide in every natural matrix, with water environments being the final sink of dispersed MPs. Microplastic distribution in water ecosystems varies as a function of multiple factors, including polymer properties (e.g., density and wettability) and environmental conditions (e.g., water currents and temperature). Because of the tendency of MPs to settle, sediment is known to be one of the most impacted environmental matrices. Despite the increasing awareness of their diffusion in sediments, a proper quantification of dispersed particles is still difficult, due to the lack of standard protocols, which avoid a proper comparison of different sites. This hampers the current knowledge on environmental implications and toxicological effects of MPs in sediments. In this work, we examined 49 studies carried out from 2004 to 2020 to describe the different extraction methods applied, and to highlight pros and cons, with the aim of evaluating the more promising protocols. Therefore, we evaluated each proposed method by considering precision, reproducibility, economic viability and greenness (in term of used reagents). Finally, we proposed a valid alternative procedure in term of reliability and costs, which can attract increasing interest for future studies.
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Affiliation(s)
- A Bellasi
- Department of Science and High Technology, University of Insubria, Via Valleggio 11, 22100, Como, Italy.
| | - G Binda
- Department of Science and High Technology, University of Insubria, Via Valleggio 11, 22100, Como, Italy.
| | - A Pozzi
- Department of Science and High Technology, University of Insubria, Via Valleggio 11, 22100, Como, Italy.
| | - G Boldrocchi
- Department of Human and Innovation for the Territory, University of Insubria, Via Valleggio 11, 22100, Como, Italy.
| | - R Bettinetti
- Department of Human and Innovation for the Territory, University of Insubria, Via Valleggio 11, 22100, Como, Italy.
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Fridel G, Fürst AE, Pozzi A, Del Chicca F, Jackson MA. Closed reduction and surgical fixation of elbow joint luxation in an adult mare and in a 3‐month‐old foal using knotless bone anchors and FiberTape. EQUINE VET EDUC 2021. [DOI: 10.1111/eve.13541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- G. Fridel
- Clinic for Equine Surgery Vetsuisse Faculty University of Zurich ZurichSwitzerland
| | - A. E. Fürst
- Clinic for Equine Surgery Vetsuisse Faculty University of Zurich ZurichSwitzerland
| | - A. Pozzi
- Clinic for Small Animal Surgery Vetsuisse Faculty University of Zurich ZurichSwitzerland
| | - F. Del Chicca
- Clinic of Diagnostic Imaging Vetsuisse Faculty University of Zurich Zurich Switzerland
| | - M. A. Jackson
- Clinic for Equine Surgery Vetsuisse Faculty University of Zurich ZurichSwitzerland
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Lampart M, Knell S, Pozzi A. [A new approach to treatment selection in dogs with cruciate ligament rupture: patient-specific treatment recommendations]. SCHWEIZ ARCH TIERH 2021; 162:345-364. [PMID: 32489180 DOI: 10.17236/sat00261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION Cranial cruciate ligament rupture is one of the most important diseases in canine orthopedics. Despite the frequent occurrence of the disease and the extensive literature available, there is still controversy about the best treatment method. The aim of this review article is to present a new, more specific approach to treatment selection in dogs with cranial cruciate ligament rupture. Patients are divided into different groups and particular treatment methods are then recommended according to group membership. In order to develop the treatment recommendations, the patient groups were initially defined based on criteria that are important for treatment selection, such as type of cranial cruciate ligament rupture, chronicity, degree of instability, size and weight of the patient, stage of osteoarthritis, the presence of bone deformities, concurrent medial patellar luxation or rotational instability. A detailed literature search was conducted through MEDLINE/PUBMED; CAB Abstracts, Google -Scholar and in conference proceedings abstracts from 1990-2019. Based on the available literature, treatment recommendations were developed for each patient group. These patient group-specific recommendations based on best available evidence are intended to simplify the decision-making process for treatment selection in dogs with cranial cruciate ligament disease.
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Affiliation(s)
- M Lampart
- Klinik für Kleintierchirurgie, Vetsuisse Fakultät, Universität Zürich, Schweiz
| | - S Knell
- Klinik für Kleintierchirurgie, Vetsuisse Fakultät, Universität Zürich, Schweiz
| | - A Pozzi
- Klinik für Kleintierchirurgie, Vetsuisse Fakultät, Universität Zürich, Schweiz
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Smolders LA, Knell SC, Park B, Pozzi A, Meij BP, Steffen F. The effects of foraminotomy and intervertebral distraction on the volume of the lumbosacral intervertebral neurovascular foramen: An ex vivo study. Vet J 2020; 256:105435. [PMID: 32113586 DOI: 10.1016/j.tvjl.2020.105435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 01/26/2020] [Accepted: 01/27/2020] [Indexed: 10/25/2022]
Abstract
Degenerative lumbosacral stenosis in dogs frequently involves L7-S1 foraminal stenosis and L7 nerve root compression. Surgical techniques to decompress the L7 nerve root include foraminotomy and intervertebral distraction. The objective of this study was to compare the effect of foraminotomy and intervertebral distraction on the total, cranial, and caudal compartmental volumes of the L7-S1 intervertebral neurovascular foramen (NF). CT images were obtained from eight canine lumbosacral (L5-CD1) specimens in the following sequential conditions: native spine (1), after dorsal laminectomy and partial discectomy of L7-S1 (2), after L7-S1 foraminotomy (3), after distraction with an interbody cage between L7 and S1 (4), after cage distraction stabilized with pedicle screw-rod fixation in neutral (5) and flexed position (6). The volume of the complete NF and its cranial and caudal subcompartments were calculated using the CT images and statistically compared between conditions. P < 0.05 was considered statistically significant. The volume of the complete NF was significantly increased after foraminotomy (mean ± standard deviation (146.8 ± 26.5%, P < 0.01) and after distraction (Condition 4, 121.0 ± 19.1%; Condition 5, 116.6 ± 29.3 %; Condition 6, 119.0 ± 21.8 %; P = 0.01) with no difference between the distraction conditions. Foraminotomy induced a significantly larger increase in total NF volume compared to distraction. Foraminotomy, but not distraction, induced a significant increase in volume of the cranial subcompartment (158.2 ± 33.2 %; P < 0.01). Foraminotomy is more effective in increasing the foraminal volume and especially the cranial subcompartment, which is where the L7 nerve root traverses the NF. Hence, foraminotomy may be more effective in decompressing the L7 nerve root.
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Affiliation(s)
- L A Smolders
- Clinic for Small Animal Surgery, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland.
| | - S C Knell
- Clinic for Small Animal Surgery, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland
| | - B Park
- Clinic for Small Animal Surgery, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland
| | - A Pozzi
- Clinic for Small Animal Surgery, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland
| | - B P Meij
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 108, 3584 CM, Utrecht, The Netherlands
| | - F Steffen
- Clinic for Small Animal Surgery, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland
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Park BH, Marches S, Eichelberger BM, Winter MD, Pozzi A, Banks SA. Quantifying dog meniscal volume at 1.5T and 3.0T MRI. Res Vet Sci 2019; 128:236-241. [PMID: 31837512 DOI: 10.1016/j.rvsc.2019.12.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 08/02/2019] [Accepted: 12/01/2019] [Indexed: 11/17/2022]
Abstract
The dog has been used extensively as an experimental model to study meniscal treatments such as meniscectomy, meniscal repair and regeneration. Accurate quantification of meniscal size and morphology are a crucial step for developing models of the meniscus. 3.0T magnetic resonance imaging (MRI) has been found to be highly accurate in analyzing the meniscus in both clinical and research fields. However, 3.0T MRI systems are still uncommonly used in veterinary medicine. The goal of the study was to compare meniscal volume measurements from 1.5T MRI system with 3.0T MRI system using proton density sequence, a clinically relevant protocol. The MR images were segmented to reconstruct 3D surface representations of both medial and lateral menisci to compare the meniscal volumes measurements. Average volume differences were 8.8% (P=0.42) and 8.9% (P=0.535) for medial and lateral meniscus, respectively. No significant volume differences were found between 1.5T and 3.0T magnetic resonance (MR) measurements, with high Pearson's correlation coefficient of r > 0.8 and the intraclass correlation coefficient (ICC) of 0.899. For inter- and intra-observer reproducibility, high correlation (ICC = 0.942 and 0.814) was observed, but with high variability for intra-observer reproducibility (lower bound 0.478, upper bound 0.949). We have shown that common clinical MR scanners and pulse sequences can be used to quantify dogs' meniscal volumes with good reproducibility. We believe that repeatable measurements of meniscal volumes using MR may provide a useful capability for assessment of postoperative results following meniscal treatments such as meniscectomy and meniscal regeneration.
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Affiliation(s)
- B H Park
- Department of Mechanical & Aerospace Engineering, University of Florida, Room 318 MAE-A, Gainesville, FL 32611, USA; Dept of the Small Animal Surgery Clinic University of Zürich, Winterthurerstrasse 258c, 8057 Zürich, Switzerland.
| | - S Marches
- Department of Small Animal Clinical Sciences, Comparative Orthopaedics Biomechanics Laboratory, College of Veterinary Medicine, University of Florida, Gainesville, FL 32610, USA
| | - B M Eichelberger
- Dept of Veterinary Large Animal Clinical Sciences, College of Veterinary Medicine, Texas A&M University, 4475 TAMU, College Station, TX 77843, USA; Veterinary Specialty Center of Tucson, 4908 N. La Canada Drive, Tucson, AZ 85704, USA
| | - M D Winter
- Department of Small Animal Clinical Sciences, Comparative Orthopaedics Biomechanics Laboratory, College of Veterinary Medicine, University of Florida, Gainesville, FL 32610, USA
| | - A Pozzi
- Department of Mechanical & Aerospace Engineering, University of Florida, Room 318 MAE-A, Gainesville, FL 32611, USA; Dept of the Small Animal Surgery Clinic University of Zürich, Winterthurerstrasse 258c, 8057 Zürich, Switzerland
| | - S A Banks
- Department of Mechanical & Aerospace Engineering, University of Florida, Room 318 MAE-A, Gainesville, FL 32611, USA
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11
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Castelli E, Longo F, Pozzi A. [Treatment of a hip and patella luxation in a toy dog]. SCHWEIZ ARCH TIERH 2019; 161:831-836. [PMID: 31782737 DOI: 10.17236/sat00239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION The present case report describes the surgical treatment of a traumatic craniodorsal luxation of the hip and a concomitant medial congenital luxation of the patella (3rd grade) in an 11-year-old Yorkshire Terrier. First the hip luxation was corrected with a cemented hip prosthesis. The femoral stem was inserted in slight anteversion (15°) with respect to the preoperative condition (5°), this contributed contrasting the medial traction of the femoral quadriceps on the patella, improving patellar luxation from 3rd to 2nd grade. However, the persistent patellar luxation and intermittent lameness reduced limb function and made a second intervention necessary. Four weeks after prosthetic surgery, a femoral trocleoplasty and lateral transposition of the tibial crest were performed to definitively re-establish a correct replacement of the patella in the femoral trochlea. No perioperative complications were found. At the final examination the patient did not show any lameness or pain that could be evoked when manipulating the surgically corrected limb. The surgical treatment allowed a restoration of the hip function and the alignment of the extensor mechanism of the femoral quadriceps and ensured a complete return to normal motor activities.
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Affiliation(s)
- E Castelli
- Klinik für Kleintierchirurgie, Vetsuisse-Fakultät, Universität Zürich
| | - F Longo
- Klinik für Kleintierchirurgie, Vetsuisse-Fakultät, Universität Zürich
| | - A Pozzi
- Klinik für Kleintierchirurgie, Vetsuisse-Fakultät, Universität Zürich
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12
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Longo F, Penelas A, Gutbrod A, Pozzi A. Three-dimensional computer-assisted corrective osteotomy with a patient-specific surgical guide for an antebrachial limb deformity in two dogs. SCHWEIZ ARCH TIERH 2019; 161:473-479. [PMID: 31298216 DOI: 10.17236/sat00216] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION We describe patient-specific surgical guide prototyping and surgical treatment of a complex antebrachial deformity in two skeletally mature dogs presented with chronic lameness. Computer-assisted surgery was elected to increase accuracy in the correction of the complex deformity. Radiographs and computed tomography (CT) scans revealed a biplane deformity with valgus, procurvatum and external torsion of the right radius in both cases. The pre-surgical planning started from the quantification of the angular deformity, followed by computer simulated correction and to end up with a rehearsal surgery on 3D printed bone models. During the surgery, the custom-made osteotomy guides closely fitted the bone, allowing for a precise corrective osteotomy, that was stabilized with two locking plates. Postoperative radiographs showed the successful correction of the deformity. Eight and 12 weeks postoperative follow up examinations showed improved lameness, weight-bearing and progression of bone healing in both dogs. Patient-specific surgical guides allowed for a satisfactory correction of the antebrachial deformity. Additional benefits of using customized surgical devices include standardization and reduced surgical time.
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Affiliation(s)
- F Longo
- Department of Small Animal Surgery, Vetsuisse Faculty, University of Zurich
| | - A Penelas
- Department of Small Animal Surgery, Vetsuisse Faculty, University of Zurich
| | - A Gutbrod
- Department of Small Animal Surgery, Vetsuisse Faculty, University of Zurich
| | - A Pozzi
- Department of Small Animal Surgery, Vetsuisse Faculty, University of Zurich
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Kirkby K, Pozzi A, Tomlinson J, Alvarez L, Foster S. Scientific Principles for Post-CCL Repair Rehabilitation: An Evidence-Based Approach. Vet Comp Orthop Traumatol 2019. [DOI: 10.1055/s-0039-1692240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- K. Kirkby
- Sound Veterinary Rehabilitation Center, Shoreline, Washington, United States
| | - A. Pozzi
- Clinic for Small Animal Surgery, University of Zurich, Zurich, Switzerland
| | - J. Tomlinson
- Twin Cities Animal Rehabilitation & Sports Medicine Clinic, Burnsville, Minnesota, United States
| | - L. Alvarez
- Integrative and Rehabilitative Medicine, The Animal Medical Center, New York, New York, United States
| | - S.A. Foster
- Department of Clinical Sciences, Colorado State University, Fort Collins, Colorado, United States
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14
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Pegoli L, Pozzi A, Pivato G. Endoscopic Single Approach Forearm Fasciotomy for Chronic Exertional Compartment Syndrome: Long Term Follow-up. J Hand Surg Asian Pac Vol 2018; 21:8-12. [PMID: 27454495 DOI: 10.1142/s2424835516400026] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND Chronic exertional compartment syndrome of the forearm is an uncommon condition, occurring in some populations such as athletes. The standard surgical treatment for professional athletes who cannot avoid trigger activity is an open forearm fasciotomy, which may require a long recovery time. The aim of this study is to present a new endoscopic single approach forearm fasciotomy technique and outcomes of at least 3 years follow up. METHODS We performed the endoscopic single approach forearm fasciotomy in 4 forearms in 3 men with the mean age of 25 years. All of the patients were evaluated at a mean follow up of 46 months using the Visual Analog Scale (VAS) for pain and the Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire. RESULTS DASH improved from 21.71 to 5.39, VAS score improved too All the patients referred pain absence after the stress test performed at 20 kilos and 40 kilos. In our series no post-operative complications were observed. CONCLUSIONS The new mini-invasive technique has proved to be safe, reliable in a long-term follow-up. The main advantage is the shortening of the recovering time, that leads to a faster return to the professional activity.
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Affiliation(s)
- L Pegoli
- 1 Hand and Reconstructive Microsurgery Unit, S. Pio X Clinic, Milan, Italy
| | - A Pozzi
- 1 Hand and Reconstructive Microsurgery Unit, S. Pio X Clinic, Milan, Italy
| | - G Pivato
- 1 Hand and Reconstructive Microsurgery Unit, S. Pio X Clinic, Milan, Italy
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15
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Penelas A, Pozzi A, Stańczyk E, Gutbrod A. [Arthroscopic-assisted stabilization of medial shoulder instability in a Miniature Poodle]. SCHWEIZ ARCH TIERH 2018; 160:533-538. [PMID: 30206049 DOI: 10.17236/sat00174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION A 12-year old female miniature Poodle was presented because of a 4/4 right fore-limb lameness. The orthopedic examination demonstrated pain at palpation of the right shoulder and an abduction angle of 55 °. MRI examination confirmed injuries consistent with a traumatic medial shoulder instability with no evidence of shoulder dysplasia. A partial rupture of the subscapularis tendon and complete detachment of the cranial gleno- humeral ligament were confirmed with arthroscopy. The joint was successfully stabilized using an arthroscopic assisted prosthetic suture.
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Affiliation(s)
- A Penelas
- Klinik für Kleintierchirurgie, Vetsuisse-Fakultät, Universität Zürich
| | - A Pozzi
- Klinik für Kleintierchirurgie, Vetsuisse-Fakultät, Universität Zürich
| | - E Stańczyk
- Klinik für Bildgebende Diagnostik, Vetsuisse-Fakultät, Universität Zürich
| | - A Gutbrod
- Klinik für Bildgebende Diagnostik, Vetsuisse-Fakultät, Universität Zürich
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16
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Au Yong JA, Lewis DD, Evans RB, Kim SE, Pozzi A. Retrospective evaluation of the efficacy of minimally invasive, fluoroscopic-assisted reduction and stabilisation of unicondylar humeral fractures. Aust Vet J 2018; 96:302-307. [DOI: 10.1111/avj.12723] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 03/08/2018] [Accepted: 04/30/2018] [Indexed: 11/30/2022]
Affiliation(s)
- JA Au Yong
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, 2015 SW 16th Ave; University of Florida; Gainesville FL 32608 USA
| | - DD Lewis
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, 2015 SW 16th Ave; University of Florida; Gainesville FL 32608 USA
| | - RB Evans
- Department of Orthopedic Surgery, School of Medicine, University of Missouri; Columbia, MO USA
| | - SE Kim
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, 2015 SW 16th Ave; University of Florida; Gainesville FL 32608 USA
| | - A Pozzi
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, 2015 SW 16th Ave; University of Florida; Gainesville FL 32608 USA
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17
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Salmaggi A, Luksch R, Forno MG, Pozzi A, Silvani A, Boiardi A, Gasparini M, Nemni R. Antineuronal Antibodies in Patients with Neuroblastoma: Relationships with Clinical Features. Tumori 2018; 83:953-7. [PMID: 9526591 DOI: 10.1177/030089169708300616] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We evaluated the frequency of serum antineuronal antibodies in a cohort of 39 neuroblastoma patients and related their presence to clinical features. Twelve patients displayed antineuronal antibodies at immunocytochemistry. Only one of these 12 patients suffered from a clinically overt paraneoplastic syndrome. No significant differences emerged between autoantibody-positive and autoantibody-negative patients in terms of progression-free and overall survival, although when only patients evolving to disease progression were considered, the time interval between diagnosis and progression was slightly longer in autoantibody-positive patients.
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Affiliation(s)
- A Salmaggi
- Istituto Nazionale Neurologico C. Besta, Milan, Italy
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18
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Salmaggi A, Nemni R, Pozzi A, Silvani A, Forno MG, Luksch R, Confalonieri P, Boiardi A. Antineuronal Antibody in a Patient with Neuroblastoma and Opsoclonus-Myoclonus-Ataxia: A Case Report. Tumori 2018; 83:709-11. [PMID: 9267493 DOI: 10.1177/030089169708300316] [Citation(s) in RCA: 7] [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: 11/16/2022]
Abstract
We describe the case of a patient with neuroblastoma and opsoclonus-myoclonus-ataxia displaying serum and CSF anti-Hu antibodies that were able to recognize antigens of the patient's own tumor.
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Affiliation(s)
- A Salmaggi
- Instituto Nazionale Neurologico C. Besta, Milan, Italy
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19
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Pozzi A, Kowaleski M, Dyce J, Johnson K. Treatment of traumatic coxo-femoral luxation by cemented total hip arthroplasty. Vet Comp Orthop Traumatol 2018. [DOI: 10.1055/s-0038-1632820] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
SummarySurgical procedures such as total hip arthroplasty (THA) or femoral head and neck excision may be indicated as a treatment for traumatic coxo-femoral luxation that is complicated by pre-existing joint disease, concurrent fractures or recurrent luxation. The purpose of our study was to evaluate outcome after treatment of traumatic coxo-femoral luxation by THA. Medical records of dogs undergoing cemented THA from 1996 to 2002 were reviewed. Inclusion criteria were coxofemoral luxation resulting from severe external trauma and radiographic follow-up of at least 3 months. Ten dogs (12 THA) met the criteria for inclusion. Complications included THA luxation (n = 1) and a non-displaced peri-prosthetic femoral fracture (n = 1) that healed without further surgery. Median cumulative function scores from client questionnaires after THA were not significantly different in dogs with previously normal (8, range: 7-10), (n = 5) and dysplastic (9, range: 7–16), (n = 5) hips (P = 0.410). Six dogs were available for re-examination and force plate analysis at greater than 6 months post-THA, and none of these dogs had any visible lameness. Peak vertical force (% BWt) showed a trend towards being less in THA (60.8±5.1) than non-operated (68.1±6.1) hindlimbs (P = 0.057), whereas vertical impulse (% BWt x sec) was similar in THA (9.1±1.6) and non-operated (9.8±1.2) hindlimbs (P = 0.286). Our findings indicate that THA can be a successful treatment for traumatic coxo-femoral luxation, irrespective of the dysplastic status of the joint prior to injury.
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20
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Arcuri L, Contaldo M, Santoro R, Pozzi A, Lorenzi C, Arcuri C, Barlattani A, Tettamanti L, Ottria L. Radiosurgery-assisted gingival displacement: a proof of concept technique to enhance the efficiency of intraoral digital impression. J BIOL REG HOMEOS AG 2018; 32:197-201. [PMID: 29460541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nowadays, an increasing number of dentists are using intraoral scanners (IOS) in their daily practice as an alternative to conventional impression taking. One of the main concerns is related to the capability of scanning the subgingival anatomy of the die, usually very challenging due to the limited operative field and the presence of oral fluids. The radiosurgery assisted gingival displacement technique (RAGD) may enhance the intraoral optical scanning of the finish line and neighbor tooth anatomy. The contour of the interim prosthesis is used to drive the tip of radiosurgery electrode along the tooth surface and open selectively the gingival crevice with a prosthetically-driven and minimally invasive approach. The clinical implication of this technique is related to increasing the efficiency and accuracy of the digital impression technique in the critical zone of the prosthetic shoulder.
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Affiliation(s)
- L Arcuri
- Department of Clinical Sciences and Translational Medicine, School of Dentistry, University of Tor Vergata, Rome, Italy
| | - M Contaldo
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Naples, Italy
| | - R Santoro
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Naples, Italy
| | - A Pozzi
- Oral Surgery and Implant Dentistry, Marche Polytechnic University, Ancona, Italy
| | - C Lorenzi
- Department of Clinical Sciences and Translational Medicine, School of Dentistry, University of Tor Vergata, Rome, Italy
| | - C Arcuri
- Department of Clinical Sciences and Translational Medicine, School of Dentistry, University of Tor Vergata, Rome, Italy
| | - A Barlattani
- Department of Clinical Sciences and Translational Medicine, School of Dentistry, University of Tor Vergata, Rome, Italy
| | - L Tettamanti
- Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - L Ottria
- Department of Clinical Sciences and Translational Medicine, School of Dentistry, University of Tor Vergata, Rome, Italy
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21
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Beer P, Pozzi A, Rohrer Bley C, Bacon N, Pfammatter NS, Venzin C. The role of sentinel lymph node mapping in small animal veterinary medicine: A comparison with current approaches in human medicine. Vet Comp Oncol 2017; 16:178-187. [DOI: 10.1111/vco.12372] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 10/17/2017] [Indexed: 12/20/2022]
Affiliation(s)
- P. Beer
- Clinic for Small Animal Surgery, Vetsuisse Faculty; University of Zurich; Zurich Switzerland
| | - A. Pozzi
- Clinic for Small Animal Surgery, Vetsuisse Faculty; University of Zurich; Zurich Switzerland
| | - C. Rohrer Bley
- Division of Radiation Oncology, Vetsuisse Faculty; University of Zurich; Zurich Switzerland
| | - N. Bacon
- Fitzpatrick Referrals Oncology and Soft Tissue; Guildford Hospital; Guildford UK
| | - N. S. Pfammatter
- Clinic for Diagnostic Imaging, Vetsuisse Faculty; University of Zurich; Zurich Switzerland
| | - C. Venzin
- Clinic for Small Animal Surgery, Vetsuisse Faculty; University of Zurich; Zurich Switzerland
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22
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Vincenti S, Knell S, Pozzi A. Surgical treatment of a proximal diaphyseal tibial deformity associated with partial caudal and cranial cruciate ligament deficiency and patella baja. SCHWEIZ ARCH TIERH 2017; 159:237-242. [DOI: 10.17236/sat00113] [Citation(s) in RCA: 6] [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] [Indexed: 11/06/2022]
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23
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Shin SY, Pozzi A, Boyd SK, Clark AL. Integrin α1β1 protects against signs of post-traumatic osteoarthritis in the female murine knee partially via regulation of epidermal growth factor receptor signalling. Osteoarthritis Cartilage 2016; 24:1795-1806. [PMID: 27211864 DOI: 10.1016/j.joca.2016.05.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 10/28/2015] [Revised: 04/06/2016] [Accepted: 05/11/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To investigate the role of integrin α1β1 in the progression of post-traumatic osteoarthritis (PTOA), and elucidate the contribution of epidermal growth factor receptor (EGFR) signalling to the mechanism by which integrin α1β1 might control PTOA. We hypothesised that integrin α1β1 plays a protective role in the course of PTOA and that the effect of PTOA (e.g., synovitis, loss of cartilage and growth of osteophytes) would be exacerbated in mice lacking integrin α1β1 at every time point post destabilisation of medial meniscus (DMM). METHODS DMM or sham surgery was performed on integrin α1-null and wild type (WT) mice and the progression of PTOA analysed at 2, 4, 8 and 12 weeks post-surgery (PS) using micro-computed tomography (microCT), histology, and immunohistochemistry. In addition, the effects of EGFR blockade were examined by treating the mice with the EGFR inhibitor erlotinib. RESULTS Integrin α1-null female, but not male, mice showed earlier cartilage degradation post DMM surgery compared to WT controls. Furthermore, erlotinib treatment resulted in significantly less cartilage damage in integrin α1-null but not WT mice. Independent of genotype, erlotinib treatment significantly mitigated the effects of PTOA on many tissues of female mice including meniscal and fabella bone volume, subchondral bone thickness and density and cartilage degradation. In contrast, reduced EGFR signalling had little effect on signs of PTOA in male mice. CONCLUSION Integrin α1β1 protects against PTOA-induced cartilage degradation in female mice partially via the reduction of EGFR signalling. Furthermore, reduction of EGFR signalling protects against the development of PTOA in female, but not male mice.
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Affiliation(s)
- S Y Shin
- Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
| | - A Pozzi
- Department of Medicine, Vanderbilt University, Nashville, TN, USA; Department of Medicine, Veterans Affairs Hospital, Nashville, TN, USA
| | - S K Boyd
- Department of Radiology, Faculty of Medicine, University of Calgary, Calgary, AB, Canada; McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - A L Clark
- Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada; McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada; Department of Surgery, Faculty of Medicine, University of Calgary, Calgary, AB, Canada.
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Morris AP, Anderson AA, Barnes DM, Bright SR, Knudsen CS, Lewis DD, Pozzi A, Langley-Hobbs SJ. Plate failure by bending following tibial fracture stabilisation in 10 cats. J Small Anim Pract 2016; 57:472-8. [DOI: 10.1111/jsap.12532] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 03/31/2016] [Accepted: 05/13/2016] [Indexed: 11/28/2022]
Affiliation(s)
- A. P. Morris
- Anderson Abercromby Veterinary Referrals; Ockley Surrey RH5 5RR
| | - A. A. Anderson
- Anderson Abercromby Veterinary Referrals; Ockley Surrey RH5 5RR
| | | | - S. R. Bright
- Northwest Surgeons; Sutton Weaver Cheshire WA7 3FW
| | - C. S. Knudsen
- Department of Veterinary Medicine; University of Cambridge; Cambridge CB3 0ES
| | - D. D. Lewis
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine; University of Florida; Gainesville FL 32610 USA
| | - A. Pozzi
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine; University of Florida; Gainesville FL 32610 USA
| | - S. J. Langley-Hobbs
- Department of Clinical Veterinary Sciences; University of Bristol; Bristol BS40 5DU
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Abstract
With the amazing increasing in number of participants, rock climbing has become a popular sport in the last decade. A growing number of participants, with different skill level, inevitably leads to an increased number of injuries related to this practice. The kind of lesions that can be observed in rock-climbers is very specific and often involves the hand. For this reason is very important for any hand surgeon that is exposed to sport injuries to know which and the most common injuries related to this sport and which are the basic principles for the treatment of those. The aim of this article is to review the literature that has been published in the last ten year in this topic. On the NCBI database 22 articles where found that where related to rock climbing lesion affecting the hand or the whole body. Differences where found according to kind of rock climbing activity that was analyzed, alpine climb leads to more serious injuries, often affecting the lower limb, while in sport and recreational rock climbing the upper limb and the hand are definitely the most affected parts. Flexor pulley lesions, followed by fractures and strains are the most common lesions affecting the hand that are related to this practice.
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Affiliation(s)
- A. Pozzi
- Hand and Reconstructive Microsurgery Unit, S. Pio X Clinic, Milan, Italy
| | - G. Pivato
- Hand and Reconstructive Microsurgery Unit, S. Pio X Clinic, Milan, Italy
| | - L. Pegoli
- Hand and Reconstructive Microsurgery Unit, S. Pio X Clinic, Milan, Italy
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Girlanda R, Pozzi A, Matsumoto CS, Fishbein TM. Multi-Visceral Transplantation in a 21-Year-Old Man with Prior Pancreatoblastoma. Int J Organ Transplant Med 2016; 7:193-196. [PMID: 27721967 PMCID: PMC5054144] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Organ transplantation in patients with prior malignancy increases the risk of tumor recurrence post-transplantation due to immunosuppression. Only two cases of liver transplantation have so far been reported in children with hepatic metastases from pancreatoblastoma, a rare malignant neoplasm originating from the epithelial exocrine cells of the pancreas. Herein, we describe a case of a successful multi-visceral transplant in a man with intestinal failure after surgical resection of pancreatoblastoma.
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Affiliation(s)
- R. Girlanda
- MedStar Georgetown Transplant Institute, Washington, DC, USA
| | - A. Pozzi
- San Raffaele Hospital, Vita-Salute San Raffaele University, Milan, Italy
| | - C. S. Matsumoto
- MedStar Georgetown Transplant Institute, Washington, DC, USA
| | - T. M. Fishbein
- MedStar Georgetown Transplant Institute, Washington, DC, USA
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27
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Dan BJ, Kim SE, Pozzi A. Management of an infected cementless cup with prosthetic retention and antibiotic therapy in a dog. J Small Anim Pract 2014; 55:585-8. [DOI: 10.1111/jsap.12261] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Revised: 04/02/2014] [Accepted: 04/22/2014] [Indexed: 11/30/2022]
Affiliation(s)
- B. J. Dan
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine; University of Florida; Gainesville FL USA
| | - S. E. Kim
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine; University of Florida; Gainesville FL USA
| | - A. Pozzi
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine; University of Florida; Gainesville FL USA
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Pozzi A, Previtali C, Lukaj A, Galli A, Bongioni G, Puglisi R. High-resolution melt analysis does not reveal mutagenic risk in sexed sperm and in vitro-derived bovine embryos. Anim Genet 2014; 45:473-8. [PMID: 24731016 DOI: 10.1111/age.12159] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/02/2014] [Indexed: 11/30/2022]
Abstract
The objectives of the present work were to verify whether simultaneous exposure to Hoechst 33342 and UV irradiation during sorting by flow cytometry may induce gene point mutations in bovine sperm and to assess whether the dye incorporated in the sperm may imply a mutagenic effect during the embryonic development. To this aim, high-resolution melt analysis (HRMA) was used to discriminate variations of single nucleotides in sexed vs. non-sexed control samples. Three batches of sorted and non-sorted commercial semen of seven bulls (42 samples) were subjected to HRMA. A set of 139 genes located on all the chromosomes was selected, and 407 regions of the genome covering a total of 83 907 bases were analyzed. Thereafter, sperm of one sexed and one non-sexed batch of each bull was used in in vitro fertilization, and the derived embryos were analyzed (n = 560). One hundred and thirty-three regions of the bovine genome, located in 40 genes, were screened for a total coverage of 23 397 bases. The comparison between the frequencies of variations, with respect to the sequences deposited, observed in the sexed and non-sexed sperm (843 vs. 770) and embryos (246 vs. 212) showed no significant differences (P > 0.05), as measured by chi-square tests. It can be concluded that staining with Hoechst 33342 and exposure to UV during sorting does not lead to significant changes in the frequencies of variants in the commercial sexed semen and in embryos produced in vitro with the same treated sperm.
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Affiliation(s)
- A Pozzi
- Istituto Sperimentale Italiano Lazzaro Spallanzani, Loc. La Quercia, Rivolta d'Adda (CR), 26027, Italy
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29
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Parekh R, Lorenzo MK, Shin SY, Pozzi A, Clark AL. Integrin α1β1 differentially regulates cytokine-mediated responses in chondrocytes. Osteoarthritis Cartilage 2014; 22:499-508. [PMID: 24418674 PMCID: PMC4028170 DOI: 10.1016/j.joca.2013.12.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 09/10/2013] [Revised: 12/07/2013] [Accepted: 12/25/2013] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To elucidate the role of integrin α1β1 in chondrocyte responses to inflammatory interleukin-1α (IL-1) and anabolic transforming growth factor-β1 (TGF-β1) in the knee. METHODS Intracellular calcium transient responses to IL-1 and TGF-β1 were measured in wild type and integrin α1-null chondrocytes using real time ex vivo confocal microscopy, and immunohistochemistry was performed to analyze TGF-β1-mediated activation of Smad2/3 in tibial and femoral chondrocytes. RESULTS Loss of integrin α1β1 reduces intracellular calcium transient response to IL-1, while it enhances chondrocyte responses to TGF-β1 as measured by intracellular calcium transients and activation of downstream Smad2/3. CONCLUSIONS Integrin α1β1 plays a vital role in mediating chondrocyte responses to two contrasting factors that are critical players in the onset and progression of osteoarthritis - inflammatory IL-1 and anabolic TGF-β. Further investigation into the molecular mechanisms by which integrin α1β1 mediates these responses will be an important next step in understanding the influence of increased expression of integrin α1β1 during the early stages of osteoarthritis on disease progression.
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Affiliation(s)
- R Parekh
- Faculty of Science, The University of Calgary, Calgary, AB, Canada
| | - MK Lorenzo
- Faculty of Science, The University of Calgary, Calgary, AB, Canada
| | - SY Shin
- Faculty of Kinesiology, The University of Calgary, Calgary, AB, Canada
| | - A Pozzi
- Department of Medicine, Vanderbilt University, Nashville, TN, USA,Department of Medicine, Veterans Affairs Hospital, Nashville, TN, USA
| | - AL Clark
- Faculty of Kinesiology, The University of Calgary, Calgary, AB, Canada,Department of Surgery, Faculty of Medicine, The University of Calgary, Calgary, AB, Canada
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Coggeshall JD, Reese DJ, Kim SE, Pozzi A. Arthroscopic-guided ulnar distraction for the correction of elbow incongruency in four dogs. J Small Anim Pract 2013; 55:46-51. [PMID: 24032426 DOI: 10.1111/jsap.12126] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2013] [Indexed: 11/29/2022]
Abstract
Four skeletally immature, small breed dogs (five elbows) with elbow incongruency were evaluated for forelimb lameness. Findings on clinical examination included pain, effusion and decreased range of motion of the affected elbow. Radiography, computed tomography and arthroscopy demonstrated elbow incongruency in all dogs. Fragmented medial coronoid process was diagnosed arthroscopically in three dogs (four elbows). Arthroscopic subtotal coronoidectomy was performed in all cases of fragmented medial coronoid process. Incongruency was corrected with acute ulnar lengthening under arthroscopic visualisation. The ulna was stabilised with a plate following correction. In two elbows an ostectomy of the anconeal process was performed to prevent impingement against the olecranon fossa. All dogs demonstrated improvement in lameness scores and client-scored visual analogue scale scores. Postoperative computed tomography showed significant improvement in elbow incongruency in all dogs. Arthroscopic-guided ulnar lengthening may be considered as a valid treatment in severe cases of elbow incongruency.
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Affiliation(s)
- J D Coggeshall
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, 32610, USA
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Luo P, Dematteo A, Wang Z, Zhu L, Wang A, Kim HS, Pozzi A, Stafford JM, Luther JM. Aldosterone deficiency prevents high-fat-feeding-induced hyperglycaemia and adipocyte dysfunction in mice. Diabetologia 2013; 56:901-10. [PMID: 23314847 PMCID: PMC3593801 DOI: 10.1007/s00125-012-2814-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Accepted: 12/10/2012] [Indexed: 10/27/2022]
Abstract
AIMS/HYPOTHESIS Obesity is associated with aldosterone excess, hypertension and the metabolic syndrome, but the relative contribution of aldosterone to obesity-related complications is debated. We previously demonstrated that aldosterone impairs insulin secretion, and that genetic aldosterone deficiency increases glucose-stimulated insulin secretion in vivo. We hypothesised that elimination of endogenous aldosterone would prevent obesity-induced insulin resistance and hyperglycaemia. METHODS Wild-type and aldosterone synthase-deficient (As (-/-)) mice were fed a high-fat (HF) or normal chow diet for 12 weeks. We assessed insulin sensitivity and insulin secretion using clamp methodology and circulating plasma adipokines, and examined adipose tissue via histology. RESULTS HF diet induced weight gain similarly in the two groups, but As (-/-) mice were protected from blood glucose elevation. HF diet impaired insulin sensitivity similarly in As (-/-) and wild-type mice, assessed by hyperinsulinaemic-euglycaemic clamps. Fasting and glucose-stimulated insulin were higher in HF-fed As (-/-) mice than in wild-type controls. Although there was no difference in insulin sensitivity during HF feeding in As (-/-) mice compared with wild-type controls, fat mass, adipocyte size and adiponectin increased, while adipose macrophage infiltration decreased. HF feeding significantly increased hepatic steatosis and triacylglycerol content in wild-type mice, which was attenuated in aldosterone-deficient mice. CONCLUSIONS/INTERPRETATION These studies demonstrate that obesity induces insulin resistance independently of aldosterone and adipose tissue inflammation, and suggest a novel role for aldosterone in promoting obesity-induced beta cell dysfunction, hepatic steatosis and adipose tissue inflammation.
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Affiliation(s)
- P. Luo
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, 2200 Pierce Avenue, 560 RRB, Nashville, TN 37232-6602, USA. Huangshi Central Hospital, Huangshi, Hubei Province, People’s Republic of China
| | - A. Dematteo
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, 2200 Pierce Avenue, 560 RRB, Nashville, TN 37232-6602, USA
| | - Z. Wang
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, 2200 Pierce Avenue, 560 RRB, Nashville, TN 37232-6602, USA
| | - L. Zhu
- Division of Endocrinology and Diabetes, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA. Department of Veterans Affairs, Nashville, TN, USA
| | - A. Wang
- Eastern Virginia Medical School, Norfolk, VA, USA
| | - H.-S. Kim
- Departments of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - A. Pozzi
- Department of Veterans Affairs, Nashville, TN, USA. Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - J. M. Stafford
- Division of Endocrinology and Diabetes, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA. Department of Veterans Affairs, Nashville, TN, USA
| | - J. M. Luther
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, 2200 Pierce Avenue, 560 RRB, Nashville, TN 37232-6602, USA. Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA
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Pozzi A, Tallarico M, Barlattani A. Unusual anchor pins placement and protocol deviations during computer-based implant placement in a patient with severe mandibular bone atrophy. A case report. Minerva Stomatol 2012; 61:299-309. [PMID: 22669061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The aim of the study was to describe an unusual method to stabilize the surgical template during the treatment of a severely resorbed edentulous mandible by means of computer-guided implant surgery. Pre-operative computer-based planning revealed the difficulty to stabilize the surgical template in a 67-year-old healthy woman. A deviation of the original NobelGuide™ protocol was performed to ensure the stability of the surgical template: four anchor pins were used to stabilize the surgical template, two in the buccal side of the anterior template and two unusual pins were placed in the lingual site. Four straight TiUnite® Nobel Biocare™ implants were then placed, according to a modified All-on-4™ concept procedure, to avoid graft procedures and to reduce the cumulative chair-side treatment time and costs. A temporary restoration was placed immediately after implant placement. Three months later a definitive, full acrylic restoration was delivered.
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Affiliation(s)
- A Pozzi
- Department of Oral Rehabilitation Tor Vergata University of Rome, Italy
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Monticelli D, Pozzi A, Credaro A, Dossi C. An Electroanalytical Approach to the Understanding of Copper Exportation in Glaciated Catchments. ELECTROANAL 2012. [DOI: 10.1002/elan.201100560] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
The articular cartilage lesions represent one of the major unsolved problems in the orthopaedic surgery. This is because articular cartilage has a limited capacity of self-repair following trauma. The aim of this study is to review the different surgical options for articular cartilage repair. They can be divided into three groups: techniques without transplant of cells or tissues; techniques based on the transplantation of tissues; the tissue engineering techniques.The first group includes the joint debridement and the techniques based on the bone marrow-stimulation principle.The second group includes the transplantation of periosteum and the transplantation of autologous or allogeneic osteochondral plugs. The tissue engineering techniques could be further divided as follows: methods based on the transplantation of cells either in solution, or in the form of microspheres, or carried on a biocompatible scaffold; the transplant of cartilage fragments; the cell-free techniques, based on the use of an acellular scaffold, able to entrap the reparative cells recruited from the host tissue and to guide their differentiation toward a chondral phenotype.In this work we present various options for the treatment of chondral or osteochondral lesions. Today, however, due to the lack of comparative studies, it is not always possible to define the best treatment choice for the different cartilage pathologies.
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Parati K, Chavanne H, Pozzi A, Previtali C, Cenadelli S, Bongioni G. Isolation and characterization of novel microsatellite DNA markers in the gilthead seabream (Sparus aurata). CONSERV GENET RESOUR 2010. [DOI: 10.1007/s12686-010-9296-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pace A, Giannarelli D, Galiè E, Savarese A, Carpano S, Della Giulia M, Pozzi A, Silvani A, Gaviani P, Scaioli V, Jandolo B, Bove L, Cognetti F. Vitamin E neuroprotection for cisplatin neuropathy: a randomized, placebo-controlled trial. Neurology 2010; 74:762-6. [PMID: 20194916 DOI: 10.1212/wnl.0b013e3181d5279e] [Citation(s) in RCA: 154] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE The clinical use of cisplatin chemotherapy is limited by severe peripheral neurotoxicity reported in up to 90% of patients receiving a cumulative dose higher than 300 mg/m(2). The present study evaluates the neuroprotective effect of antioxidant supplementation (vitamin E) in patients treated with cisplatin chemotherapy. METHODS A total of 108 patients treated with cisplatin chemotherapy were randomly assigned to receive vitamin E supplementation (alpha-tocopherol 400 mg/day) or placebo. Treatment was started orally before chemotherapy and continued for 3 months after the suspension of cisplatin. RESULTS Of 108 randomized patients, 68 received at least one clinical and neurophysiologic examination after cisplatin CT; 41 patients received a cumulative dose of cisplatin higher than 300 mg/m(2) and were eligible for statistical analysis: 17 in the vitamin E group (group 1) and 24 in the placebo group (group 2). The incidence of neurotoxicity was significantly lower in group 1 (5.9%) than in group 2 (41.7%) (p < 0.01). The severity of neurotoxicity, measured with a validated neurotoxicity score (Total Neuropathy Score [TNS]), was significantly lower in patients receiving vitamin E than those receiving placebo (mean TNS 1.4 vs 4.1; p < 0.01). CONCLUSIONS This phase III study confirms the neuroprotective role of vitamin E against cisplatin peripheral neurotoxicity. Vitamin E supplementation should be adopted in patients receiving cisplatin-based chemotherapy. CLASSIFICATION OF EVIDENCE This study provides Class II evidence that vitamin E supplementation significantly reduces the relative risk of developing signs or symptoms of neurotoxicity (relative risk = 0.14) (95% confidence interval = 0.02-1.00, p < 0.05).
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Affiliation(s)
- A Pace
- Department of Neuroscience, Regina Elena National Cancer Institute, 00144 Rome, Italy.
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Benini F, Pigozzi MG, Pozzi A, Bercich L, Reggiani A, Quattrocchi D, Distefano L, Donati P, Cesana BM, Lanzini A. Elevation of serum gamma-glutamyltranspeptidase activity is frequent in chronic hepatitis C, and is associated with insulin resistance. Dig Liver Dis 2009; 41:586-90. [PMID: 19131283 DOI: 10.1016/j.dld.2008.11.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2008] [Revised: 11/05/2008] [Accepted: 11/17/2008] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS Serum gamma-glutamyltranspeptidase level is often increased in patients with chronic hepatitis C, and we aimed to identify factors associated with this phenomenon in patients completely abstinent from alcohol (teetotaller). PATIENTS AND METHODS 71 teetotaller patients have been identified by personal history, questioning of relatives, CAGE questionnaire administration and unscheduled alcoholemia measurements. RESULTS 39 patients (55%) had elevated (>50IU/L) gamma-glutamyltranspeptidase level. Body mass index, insulin and C-peptide level, insulin resistance, piecemeal necrosis score > or =3, fibrosis score > or =2 and steatosis score > or =1 were significantly higher in these patients than in those (n=32) with normal gamma-glutamyltranspeptidase. At multiple linear regression analysis gamma-glutamyltranspeptidase level was associated with C-peptide level, insulin resistance and histopathologic grading. At multiple logistic regression analysis, C-peptide level (OR=2.13) and piecemeal necrosis score > or =3 (OR=4.59) were the only factors independently associated with elevated gamma-glutamyltranspeptidase. Sustained virological response during pegylated interferon plus ribavirine treatment was achieved by 97% and 49% patients with normal and elevated gamma-glutamyltranspeptidase, respectively (p=0.0001). CONCLUSION Serum gamma-glutamyltranspeptidase level is often elevated in chronic hepatitis C and is associated with metabolic and inflammatory factors; this phenomenon may contribute to explain and to predict resistance to treatment in this subgroup of patients.
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Affiliation(s)
- F Benini
- Gastroenterology Unit, University and Spedali Civili, Piazzale Spedali Civili, 1, 25126 Brescia, Italy
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Campus G, Condò SG, Di Renzo G, Ferro R, Gatto R, Giuca MR, Giuliana G, Majorana A, Marzo G, Ottolenghi L, Petti S, Piana G, Pizzi S, Polimeni A, Pozzi A, Sapelli PL, Ugazio A. National Italian Guidelines for caries prevention in 0 to 12 years-old children. Eur J Paediatr Dent 2007; 8:153-159. [PMID: 17919065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
AIM Oral and dental health improved tremendously over the last fifty years in Italy but still prevalence of dental caries in children remains a significant clinical problem. This report describes the National Italian Guidelines for caries prevention. METHODOLOGY A panel of experts coordinated by the Italian Society of Paediatric Dentistry (SIOI) planned to elaborate the national Italian guidelines for caries prevention in children. The structure of the guidelines has been planned to follow the principles of modern caries treatment and management as well as science based dentistry. The main procedure was based on a hierarchic evaluation of literature. CONCLUSION The guidelines are planned for dentist working in primary dental care, however, they are also designed to be of interest for other care professionals such as paediatricians, gynecologists, pharmacists and general medical practitioners and also for parents and/or guardians of the children.
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Abstract
Podocyte injury and loss contribute to progressive glomerulosclerosis. Peroxisome proliferator-activated receptor-gamma (PPAR-gamma) is a nuclear hormone receptor, which we have found to be increased in podocytes in a variety of kidney diseases. It is not known if PPAR-gamma contributes to renal injury or if it serves as a countermeasure to limit renal injury during disease progression. We tested these possibilities utilizing the puromycin aminonucleoside (PAN) model of renal injury in immortalized mouse podocytes. The cultured podocytes expressed PPAR-gamma mRNA at baseline but this was decreased by PAN. Pioglitazone, a pharmacologic agonist of PPAR-gamma, increased both PPAR-gamma mRNA and activity in injured podocytes, as assessed by a reporter plasmid assay. Further, pioglitazone significantly decreased PAN-induced podocyte apoptosis and necrosis while restoring podocyte differentiation. The PPAR-gamma agonist significantly restored expression of the cyclin-dependent kinase inhibitor p27 and the antiapoptotic molecule Bcl-xL while significantly decreasing proapoptotic caspase-3 activity. Pioglitazone tended to decrease PAN-induced transforming growth factor-beta (TGF-beta) mRNA expression. Our study shows that PPAR-gamma is normally expressed by podocytes and its activation is protective against PAN-induced apoptosis and necrosis. We postulate that this protective effect may be mediated in part by effects on p27 and TGF-beta expression.
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Affiliation(s)
- T Kanjanabuch
- Department of Pathology, Vanderbilt University Medical Center, Nashville, Tennessee 37232, USA
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Nakagawa K, Holla VR, Wei Y, Wang WH, Gatica A, Wei S, Mei S, Miller CM, Cha DR, Price E, Zent R, Pozzi A, Breyer MD, Guan Y, Falck JR, Waterman MR, Capdevila JH. Does Malfunction of Arachidonic Acid Epoxygenase Explain Salt-Sensitive Hypertension? J Am Soc Nephrol 2006; 17:2345-2352. [PMID: 37000980 DOI: 10.1681/01.asn.0000926848.81018.f7] [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: 03/28/2023] Open
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Zent R, Yan X, Su Y, Hudson BG, Borza DB, Moeckel GW, Qi Z, Sado Y, Breyer MD, Voziyan P, Pozzi A. Glomerular injury is exacerbated in diabetic integrin α1-null mice. Kidney Int 2006; 70:460-70. [PMID: 16775606 DOI: 10.1038/sj.ki.5000359] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Excessive glomerular collagen IV and reactive oxygen species (ROS) production are key factors in the development of diabetic nephropathy. Integrin alpha1beta1, the major collagen IV receptor, dowregulates collagen IV and ROS production, suggesting this integrin might determine the severity of diabetic nephropathy. To test this possibility, wild-type and integrin alpha1-null mice were rendered diabetic with streptozotocin (STZ) (100 mg/kg single intraperitoneal injection), after which glomerular filtration rate (GFR), glomerular collagen deposition, and glomerular basement membrane (GBM) thickening were evaluated. In addition, ROS and collagen IV production by mesangial cells as well as their proliferation was measured in vitro. Diabetic alpha1-null mice developed worse renal disease than diabetic wild-type mice. A significant increase in GFR was evident in the alpha1-null mice at 6 weeks after the STZ injection; it started to decrease by week 24 and reached levels of non-diabetic mice by week 36. In contrast, GFR only increased in wild-type mice at week 12 and its elevation persisted throughout the study. Diabetic mutant mice also showed increased glomerular deposition of collagen IV and GBM thickening compared to diabetic wild-type mice. Primary alpha1-null mesangial cells exposed to high glucose produced more ROS than wild-type cells, which led to decreased proliferation and increased collagen IV synthesis, thus mimicking the in vivo finding. In conclusion, this study suggests that lack of integrin alpha1beta1 exacerbates the glomerular injury in a mouse model of diabetes by modulating GFR, ROS production, cell proliferation, and collagen deposition.
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Affiliation(s)
- R Zent
- Department of Medicine, Division of Nephrology, Medical Center North, Vanderbilt University, Nashville, Tennessee 37232, USA
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Kamiyama M, Pozzi A, Yang L, DeBusk LM, Breyer RM, Lin PC. EP2, a receptor for PGE2, regulates tumor angiogenesis through direct effects on endothelial cell motility and survival. Oncogene 2006; 25:7019-28. [PMID: 16732324 DOI: 10.1038/sj.onc.1209694] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Prostaglandin E2 (PGE2), a major cyclooxygenase (COX) metabolite, plays important roles in tumor biology. We studied the role of EP2, a receptor for PGE2, in tumor angiogenesis using EP2 knockout mice. We found that deletion of the EP2 receptor impaired tumor angiogenesis and this finding was confirmed by an in vivo corneal angiogenesis model and an ex vivo aortic ring assay. To further characterize the cellular mechanisms of the EP2 receptor in angiogenesis, we isolated primary pulmonary endothelial cells (ECs) from wild-type (wt) and EP2-/- mice and observed that EP2-/- ECs exhibited defects in vascular branch formation when compared to wt ECs. In addition, EP2-/- ECs showed impaired cell motility on collagen-coated surface and they responded poorly to PGE2-induced cell migration compared to control cells. However, no difference in cell proliferation was observed between the EP2-/- and wt Ecs. In addition, EP2-/- ECs were more susceptible to apoptosis than wt cells under growth factor depletion conditions. Collectively, our data demonstrate that EP2 signaling in endothelium directly regulates tumor angiogenesis by contributing to cell survival and endothelial cell motility. Moreover, our finding suggests that EP2 is a major receptor in PGE2-mediated cell motility in ECs.
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Affiliation(s)
- M Kamiyama
- Department of Radiation Oncology, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN 37232, USA
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Loglio F, Foresti ML, Pozzi A, D'Anca F, Felici R, Borgatti F, Innocenti M, Salvietti E, Giusti A. In-situX-ray analysis under controlled potential conditions: an innovative setup and its application to the investigation of ultrathin films electrodeposited on Ag(111). Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305081237] [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: 11/10/2022] Open
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Romanelli G, Cravarezza P, Pozzi A, Franchino L, Ravizzola G, Zulli R, Donati P, Prometti P, Grassi V. Carbapenems in the treatment of severe community-acquired pneumonia in hospitalized elderly patients: a comparative study against standard therapy. J Chemother 2002; 14:609-17. [PMID: 12583553 DOI: 10.1179/joc.2002.14.6.609] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
In this open, prospective, study were enrolled 204 hospitalized elderly patients with severe (88 males, 116 females, age range 70-94). Patients were randomized to receive one of the following antibiotic treatment regimens: meropenem 500 mg i.v. t.i.d. (52); imipenem/cilastatin 500 mg i.v. t.i.d. (51), clarithromycin 500 mg + ceftriaxone 1 g i.v. b.i.d. (52), clarithromycin 500 mg + amikacin 250 mg i.v. b.i.d. (49). In 99 cases causative germs were isolated (24 meropenem, 26 imipenem, 23 clarithromycin + ceftriaxone, 26 ceftriaxone + amikacin). A satisfactory clinical, bacteriological response was achieved respectively in 86.5% 77% in meropenem; 86.3% 71% in imipenem/cilastatin; 69% 61% in ceftriaxone + clarithromycin and in 85.7% 77% in clarithromycin + amikacin. The mean total cost for each patient was $1,560; $1,620; $1,760 and $1,792 in meropenem, imipenem/cilastatin, clarithromycin + ceftriaxone and clarithromycin + amikacin respectively. This study shows that treatment with either meropenem or imipenem is as efficacious as conventional therapy in the treatment of community acquired pneumonia (CAP), and that meropenem is the most cost-effective.
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Affiliation(s)
- G Romanelli
- Department of Internal and Geriatric Medicine, University of Brescia, Italy.
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Masciocchi N, Moret M, Sironi A, Bruni S, Cariati F, Pozzi A, Manfredini T, Menabue L, Pellacani GC. Structural and spectroscopic correlations in cadmium(II) halide complexes of 2,2-dimethylpropane-1,3-diamine. Inorg Chem 2002. [DOI: 10.1021/ic00034a020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
OBJECTIVE To evaluate the characteristics of EEG paroxysms and the relationship between EEG spikes and ictal myoclonic jerks in patients with juvenile myoclonic epilepsy (JME). METHODS Six patients with a typical form of JME entered the study and underwent computerized polygraphic recordings. In each patient, the inter-peak spike interval was measured on repeated EEG bursts, and jerk-locked back averaging was performed on ictal epochs using a time window including the 100 ms before and the 100-200 ms after the point at which the jerk-related EMG potential diverged from baseline. RESULTS In all cases, the myoclonic jerks were associated with polyspike waves (PSW) complexes. The frequency of repeated spikes within the PSW complex ranged from 16 to 27 Hz. Jerk-locked averaging revealed a positive-negative EEG transient with maximal amplitude on the frontal leads, which preceded the myoclonic jerk by 10.25+/-0.96 ms. A delay of 9.50+/-1.73 ms was measured between the jerk-locked positive peak detected on the frontal EEG leads of the two hemispheres; a comparable time lag was observed between the onset of myoclonic jerks in the two deltoid muscles. CONCLUSIONS Our data suggest that the ultimate mechanism responsible for ictal myoclonic jerks in JME is largely similar to that sustaining cortical myoclonus in more severe pathological conditions such as progressive myoclonus epilepsies, despite the different pathogenic substrate and triggering mechanisms.
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Affiliation(s)
- F Panzica
- Department of Neurophysiology, C. Besta Neurological Institute, via Celoria 11, 20133, Milan, Italy
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Binelli S, Canafoglia L, Panzica F, Pozzi A, Franceschetti S. Electroencephalographic features in a series of patients with neuronal ceroid lipofuscinoses. Neurol Sci 2001; 21:S83-7. [PMID: 11073233 DOI: 10.1007/s100720070045] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the electroencephalographic (EEG) features of 22 patients with neuronal ceroid lipofuscinoses (NCL) who were referred to the Neurological Institute of Milan between 1984 and 1998. The EEG data were reviewed, taking into account the different forms of NCL on the basis of age at onset, clinical features and morphological appearance. The study group included patients with infantile NCL (one case), late-infantile NCL (ten cases), juvenile NCL (seven cases) and adult NCL (four cases). We looked for the presence of homogeneous EEG features associated with these different forms, particularly in the early phases of the disease. Our data indicate that the EEG characteristics of late-infantile NCL and of the myoclonic form of adult NCL are quite distinctive, and that their particular spontaneous epileptiform anomalies and response to intermittent light stimulation can be considered relevant diagnostic clues at an early disease stage.
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Affiliation(s)
- S Binelli
- National Neurological Institute C. Besta, Milan, Italy
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Recchia S, Monticelli D, Pozzi A, Rampazzi L, Dossi C. On the effect of catalyst status in the quantitative determination of platinum in Pt-Sn/MgO materials. Fresenius J Anal Chem 2001; 369:403-6. [PMID: 11270218 DOI: 10.1007/s002160000634] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The development of an analytical method for the determination of platinum in MgO based Pt/Sn catalysts is described. Electrothermal atomic absorption spectroscopy (ETAAS) was chosen because of its high sensitivity and robustness against spectral interferences. All the sources of chemical interferences were statistically analyzed and corrections were adopted for the presence of magnesium oxide support. The effectiveness of different mineralization procedures was critically evaluated as a function of the chemical of the solid catalyst. Microwave digestion allowed recovery of metal of 100% for all the catalysts analyzed and exhibited significant better precision values than other digestion methods, which could nevertheless be utilized under proper conditions in selected cases.
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Affiliation(s)
- S Recchia
- Dipartimento di Scienze Chimiche Fisiche e Matematiche, Università degli Studi dell'Insubria, Via Lucini, 3 22100 Como, Italy.
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Pozzi A, Moberg PE, Miles LA, Wagner S, Soloway P, Gardner HA. Elevated matrix metalloprotease and angiostatin levels in integrin alpha 1 knockout mice cause reduced tumor vascularization. Proc Natl Acad Sci U S A 2000; 97:2202-7. [PMID: 10681423 PMCID: PMC15778 DOI: 10.1073/pnas.040378497] [Citation(s) in RCA: 305] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Integrin alpha1beta1 is a collagen receptor abundantly expressed on microvascular endothelial cells. As well as being the only collagen receptor able to activate the Ras/Shc/mitogen-activated protein kinase pathway promoting fibroblast cell proliferation, it also acts to inhibit collagen and metalloproteinase (MMP) synthesis. We have observed that in integrin alpha1-null mice synthesis of MMP7 and MMP9 was markedly increased compared with that of their wild-type counterparts. As MMP7 and MMP9 have been shown to generate angiostatin from circulating plasminogen, and angiostatin acts as a potent inhibitor of endothelial cell proliferation, we determined whether tumor vascularization was altered in the alpha1-null mice. Tumors implanted into alpha1-null mice showed markedly decreased vascularization, with a reduction in capillary number and size, which was accompanied by an increase in plasma levels of angiostatin due to the action of MMP7 and MMP9 on circulating plasminogen. In vitro analysis of alpha1-null endothelial cells revealed a marked reduction of their proliferation on both integrin alpha1-dependent (collagenous) and independent (noncollagenous) substrata. This reduction was prevented by culturing alpha1-null cells with plasma derived from plasminogen-null animals, thus omitting the source from which to generate angiostatin. Plasma from tumor-bearing alpha1-null animals uniquely inhibited endothelial cell growth, and this inhibition was relieved by the coaddition of either MMP inhibitors, or antibody to angiostatin. Integrin alpha1-deficient mice thus provide a genetically characterized model for enhanced angiostatin production and serve to reveal an unwanted potential side effect of MMP inhibition, increased tumor angiogenesis.
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Affiliation(s)
- A Pozzi
- Department of Cell Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
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Fermo P, Cariati F, Pozzi A, Tettamanti M, Collina E, Pitea D. Analytical characterization of municipal solid waste incinerator fly ash. Part II. Fresenius J Anal Chem 2000; 366:267-72. [PMID: 11225671 DOI: 10.1007/s002160050052] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The synergy of the micro FT-IR (Fourier Transform-Infrared) and SEM-EDX (Scanning Electron Microscopy-Energy Dispersive X-ray) techniques has been shown to be particularly helpful and effective for the characterization of inorganic compounds in fly ashes. The experimental data obtained by these techniques have been interpreted in comparison with those of other techniques. The presence of calcium carbonate, some sulfates, ammonium nitrate, calcium hydrogen phosphate, some chlorides, some oxides and aluminium silicates have been verified.
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Affiliation(s)
- P Fermo
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica, Università degli Studi di Milano, Italy
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