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Wall C, Weir-McCall J, Tweed K, Hoole SP, Gopalan D, Huang Y, Corovic A, Peverelli M, Dey D, Bennett MR, Rudd JHF, Kydd A, Bhagra S, Tarkin JM. CT pericoronary adipose tissue density predicts coronary allograft vasculopathy and adverse clinical outcomes after cardiac transplantation. Eur Heart J Cardiovasc Imaging 2024:jeae069. [PMID: 38493483 DOI: 10.1093/ehjci/jeae069] [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] [Received: 12/08/2023] [Accepted: 02/26/2024] [Indexed: 03/19/2024] Open
Abstract
AIMS To assess pericoronary adipose tissue (PCAT) density on Coronary Computed Tomography Angiography (CCTA) as a marker of inflammatory disease activity in coronary allograft vasculopathy (CAV). METHODS AND RESULTS PCAT density, lesion volumes, and total vessel volume-to-myocardial mass ratio (V/M) were retrospectively measured in 126 CCTAs from 94 heart transplant patients (mean age 49 [SD 14.5] years, 40% female) who underwent imaging between 2010 to 2021; age and sex-matched controls; and patients with atherosclerosis. PCAT density was higher in transplant patients with CAV (n = 40; -73.0 HU [SD 9.3]) than without CAV (n = 86; -77.9 HU [SD 8.2]), and controls (n = 12; -86.2 HU [SD 5.4]), p < 0.01 for both. Unlike patients with atherosclerotic coronary artery disease (n = 32), CAV lesions were predominantly non-calcified, comprised of mostly fibrous or fibrofatty tissue. V/M was lower in patients with CAV than without (32.4 mm3/g [SD 9.7] vs. 41.4 mm3/g [SD 12.3], p < 0.0001). PCAT density and V/M improved the ability to predict CAV from AUC 0.75 to 0.85 when added to donor age and donor hypertension status (p < 0.0001). PCAT density above -66 HU was associated with a greater incidence of all-cause mortality (OR 18.0 [95%CI 3.25-99.6], p < 0.01) and the composite endpoint of death, CAV progression, acute rejection, and coronary revascularization (OR 7.47 [95%CI 1.8-31.6], p = 0.01) over 5.3 (SD 2.1) years. CONCLUSIONS Heart transplant patients with CAV have higher PCAT density and lower V/M than those without. Increased PCAT density is associated with adverse clinical outcomes. These CCTA metrics could be useful for diagnosis and monitoring of CAV severity.
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Affiliation(s)
- Christopher Wall
- Section of Cardiorespiratory Medicine, University of Cambridge, Cambridge, UK
| | - Jonathan Weir-McCall
- Department of Radiology, University of Cambridge, Cambridge, UK
- Department of Radiology, Royal Papworth Hospital, Cambridge, UK
| | - Katharine Tweed
- Department of Radiology, Royal Papworth Hospital, Cambridge, UK
| | - Stephen P Hoole
- Department of Cardiology, Royal Papworth Hospital, Cambridge, UK
| | - Deepa Gopalan
- Department of Radiology, Cambridge University Hospitals NHS Trust, Cambridge, UK
- Department of Radiology, Imperial College Healthcare NHS Trust, London, UK
| | - Yuan Huang
- Section of Cardiorespiratory Medicine, University of Cambridge, Cambridge, UK
| | - Andrej Corovic
- Section of Cardiorespiratory Medicine, University of Cambridge, Cambridge, UK
| | - Marta Peverelli
- Section of Cardiorespiratory Medicine, University of Cambridge, Cambridge, UK
| | - Damini Dey
- Departments of Biomedical Sciences and Medicine, Cedars-Sinai Medical Center, Biomedical Imaging Research Institute, Los Angeles, California
| | - Martin R Bennett
- Section of Cardiorespiratory Medicine, University of Cambridge, Cambridge, UK
| | - James H F Rudd
- Section of Cardiorespiratory Medicine, University of Cambridge, Cambridge, UK
| | - Anna Kydd
- Transplant Unit, Royal Papworth Hospital, Cambridge, UK
| | - Sai Bhagra
- Transplant Unit, Royal Papworth Hospital, Cambridge, UK
| | - Jason M Tarkin
- Section of Cardiorespiratory Medicine, University of Cambridge, Cambridge, UK
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2
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Harrison J, Newland SA, Jiang W, Giakomidi D, Zhao X, Clement M, Masters L, Corovic A, Zhang X, Drago F, Ma M, Ozsvar Kozma M, Yasin F, Saady Y, Kothari H, Zhao TX, Shi GP, McNamara CA, Binder CJ, Sage AP, Tarkin JM, Mallat Z, Nus M. Marginal zone B cells produce 'natural' atheroprotective IgM antibodies in a T cell-dependent manner. Cardiovasc Res 2024; 120:318-328. [PMID: 38381113 PMCID: PMC10939463 DOI: 10.1093/cvr/cvae027] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/10/2023] [Accepted: 12/12/2023] [Indexed: 02/22/2024] Open
Abstract
AIMS The adaptive immune response plays an important role in atherosclerosis. In response to a high-fat/high-cholesterol (HF/HC) diet, marginal zone B (MZB) cells activate an atheroprotective programme by regulating the differentiation and accumulation of 'poorly differentiated' T follicular helper (Tfh) cells. On the other hand, Tfh cells activate the germinal centre response, which promotes atherosclerosis through the production of class-switched high-affinity antibodies. We therefore investigated the direct role of Tfh cells and the role of IL18 in Tfh differentiation in atherosclerosis. METHODS AND RESULTS We generated atherosclerotic mouse models with selective genetic deletion of Tfh cells, MZB cells, or IL18 signalling in Tfh cells. Surprisingly, mice lacking Tfh cells had increased atherosclerosis. Lack of Tfh not only reduced class-switched IgG antibodies against oxidation-specific epitopes (OSEs) but also reduced atheroprotective natural IgM-type anti-phosphorylcholine (PC) antibodies, despite no alteration of natural B1 cells. Moreover, the absence of Tfh cells was associated with an accumulation of MZB cells with substantially reduced ability to secrete antibodies. In the same manner, MZB cell deficiency in Ldlr-/- mice was associated with a significant decrease in atheroprotective IgM antibodies, including natural anti-PC IgM antibodies. In humans, we found a positive correlation between circulating MZB-like cells and anti-OSE IgM antibodies. Finally, we identified an important role for IL18 signalling in HF/HC diet-induced Tfh. CONCLUSION Our findings reveal a previously unsuspected role of MZB cells in regulating atheroprotective 'natural' IgM antibody production in a Tfh-dependent manner, which could have important pathophysiological and therapeutic implications.
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Affiliation(s)
- James Harrison
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - Stephen A Newland
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - Wei Jiang
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - Despoina Giakomidi
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - Xiaohui Zhao
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - Marc Clement
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
- Laboratory for Vascular Translational Sciences (LVTS), Université de Paris, INSERM U1148, Paris, France
| | - Leanne Masters
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - Andrej Corovic
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - Xian Zhang
- Department of Medicine, Brigham and Woman’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Fabrizio Drago
- Division of Cardiovascular Medicine, Department of Medicine, University of Virginia, Charlottesville, VA, USA
| | - Marcella Ma
- Wellcome-MRC Institute of Metabolic Science and Medical Research Council Metabolic Diseases Unit, University of Cambridge, UK
| | - Maria Ozsvar Kozma
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Froher Yasin
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - Yuta Saady
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - Hema Kothari
- Division of Cardiovascular Medicine, Department of Medicine, University of Virginia, Charlottesville, VA, USA
| | - Tian X Zhao
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - Guo-Ping Shi
- Department of Medicine, Brigham and Woman’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Coleen A McNamara
- Division of Cardiovascular Medicine, Department of Medicine, University of Virginia, Charlottesville, VA, USA
| | - Christoph J Binder
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Andrew P Sage
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - Jason M Tarkin
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - Ziad Mallat
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
- PARCC Inserm U970, Universite de Paris, Paris, France
| | - Meritxell Nus
- Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
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3
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Corovic A, Nus M, Peverelli M, Gopalan D, Calvert PA, Hoole SP, Manavaki R, Fryer T, Aloj L, Graves MJ, Dweck MR, Newby DE, Mallat Z, Rudd JHF, Tarkin JM. Imaging of post-infarct myocardial inflammation with 68Ga-DOTATATE PET/MRI. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
After myocardial infarction (MI), inflammation and its resolution modulate the extent of myocardial damage. 68Ga-DOTATATE is a PET tracer that binds to somatostatin receptor 2 (SST2), which is up-regulated in pro-inflammatory macrophages [1].
Purpose
We investigated 68Ga-DOTATATE PET/MRI for quantifying post-infarct myocardial inflammation.
Methods
In this prospective observational cohort study, participants with MI underwent 68Ga-DOTATATE PET/MRI at baseline (t0: <2 weeks post-MI) and 3 months (t3M). Patients with prior MI, heart failure, coronary revascularisation, or contraindication to PET/MRI, were excluded. Blood samples were taken at the time of imaging for high sensitivity CRP (hsCRP), high sensitivity troponin I (hsTnI), NTproBNP and peripheral blood monocyte subset counts measured by mass cytometry. 68Ga-DOTATATE maximum Standardised Uptake Values (SUV) and Tissue-to-Background Ratios (TBR) adjusted for blood pool activity were compared in the infarct defined by late gadolinium enhancement (LGE) MRI to remote myocardium at t0 and t3M.
Results
Thirty-two patients (mean age 59 [SD 9] years; 26 [81%] male and 6 [19%] female), comprised of 18 (56%) patients with ST elevation MI and 14 (44%) with non-ST elevation MI, were enrolled. Mean peak troponin was 16,953ng/L (range 408 to >25,000ng/L), and 16 (52%) patients had left ventricular impairment (ejection fraction <50%).
68Ga-DOTATATE PET signal co-localised with myocardial LGE and focal oedema (arrows) on T2-weighted MRI (Fig. 1; asterisk: culprit artery) and had excellent ability to discriminate infarct from remote regions (t0: infarct SUV 2.41 vs. remote 1.58, p<0.0001; t0: infarct TBR 5.08 vs. 3.35, p<0.0001; Fig. 2a).
At 100 (SD 13) days after MI (n=23 patients), residual 68Ga-DOTATATE uptake in the infarct remained higher than remote myocardium (t3M: infarct SUV 1.88 vs. remote 1.27, p<0.0001; t3M: infarct TBR 3.96 vs. remote 2.73, p<0.0001), but was reduced compared to baseline (SUV −22%, p<0.0001; TBR −22%, p=0.002; Fig. 2b).
Reduction in infarct 68Ga-DOTATATE uptake was consistent with overall decreases in hsCRP (2.16 vs. 8.76 mg/L), hsTnI (19 vs. 1365 ng/L) and NTproBNP (372 vs. 959 pg/mL) at t3M vs. t0 (n=23, all p<0.05). Focal oedema on MRI was resolved in 17 (74%) patients at t3M. Infarct-to-remote TBR ratio at t0 was correlated with hsTnI (r=0.35, p<0.05). At t3M (n=9 samples) vs t0 (n=20 samples), there was a reduction in % classical-to-non-classical ratio of peripheral monocytes (mean 6.5 [SD 3.8] vs. 14.4 [SD 11.2], p=0.005).
Conclusions
This is the first prospective study of serial 68Ga-DOTATATE PET/MRI in patients after MI. Here we show that 68Ga-DOTATATE tracks resolving myocardial inflammation. Ongoing work as part of this study seeks to confirm the cellular origin of infarct-related 68Ga-DOTATATE PET signal and SST2 expression within inflamed myocardial tissue, and test its longer-term association with ischaemic myocardial remodelling.
Funding Acknowledgement
Type of funding sources: Foundation. Main funding source(s): Wellcome TrustBritish Heart Foundation
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Affiliation(s)
- A Corovic
- University of Cambridge , Cambridge , United Kingdom
| | - M Nus
- University of Cambridge , Cambridge , United Kingdom
| | - M Peverelli
- University of Cambridge , Cambridge , United Kingdom
| | - D Gopalan
- Cambridge University Hospitals NHS Foundation Trust , Cambridge , United Kingdom
| | - P A Calvert
- Royal Papworth Hospital NHS Foundation Trust , Cambridge , United Kingdom
| | - S P Hoole
- Royal Papworth Hospital NHS Foundation Trust , Cambridge , United Kingdom
| | - R Manavaki
- University of Cambridge , Cambridge , United Kingdom
| | - T Fryer
- University of Cambridge , Cambridge , United Kingdom
| | - L Aloj
- University of Cambridge , Cambridge , United Kingdom
| | - M J Graves
- University of Cambridge , Cambridge , United Kingdom
| | - M R Dweck
- University of Edinburgh , Edinburgh , United Kingdom
| | - D E Newby
- University of Edinburgh , Edinburgh , United Kingdom
| | - Z Mallat
- University of Cambridge , Cambridge , United Kingdom
| | - J H F Rudd
- University of Cambridge , Cambridge , United Kingdom
| | - J M Tarkin
- University of Cambridge , Cambridge , United Kingdom
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4
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Tarkin J, Corovic A, Wall C, Nus M, Gopalan D, Huang Y, Imaz M, Zulcinski M, Reynolds G, Morgan AW, Jorgensen HF, Mallat Z, Peters JE, Rudd JHF, Mason JC. Somatostatin receptor PET/MR imaging of large vessel inflammation in active compared with inactive vasculitis and atherosclerosis. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Use of 18F-FDG PET in large vessel vasculitis (LVV) is limited by non-specific uptake due to arterial remodelling and/or atherosclerosis leading to diagnostic uncertainty.
Purpose
To investigate somatostatin receptor 2 (SST2) as a novel inflammation-specific PET imaging target in LVV.
Methods
In a prospective observational cohort study, we tested the ability of PET/MRI using two somatostatin receptor tracers (68Ga-DOTATATE and 18F-FET-βAG-TOCA) to differentiate active from inactive LVV, and aortic atherosclerosis in patients with recent myocardial infarction. Ex vivo mapping of the imaging target was performed using immunofluorescence microscopy, imaging mass cytometry, and bulk, single-cell and single-nuclei RNA sequencing of temporal artery biopsies from LVV patients.
Results
Sixty-one participants were included (LVV, n=27; myocardial infarction ≤2 weeks, n=25; control subjects with an oncological indication for imaging, n=9). LVV patients (mean age 58 [SD 16] years; 78% female; 63% active or grumbling disease) had giant cell arteritis (n=13), Takayasu arteritis (n=13), or unspecified LVV (n=1). Baseline index vessel SST2 PET maximum tissue-to-blood ratio (TBRmax) was 61.8% (95% CI 31.5–99.0%, p<0.0001) higher in patients with active/grumbling LVV than inactive LVV, and 34.6% (95% CI 15.1–57.6%, p=0.0002) higher than recent myocardial infarction (Fig. 1a–c; arrow: PET signal; arrowhead: aortic thickening; asterisk: aortic atherosclerosis), with good diagnostic accuracy (AUC ≥0.86, p<0.001 for both). None of the control subjects without LVV or MI had increased arterial SST2 PET signal (Fig. 1d).
Mean aortic TBRmax was strongly correlated with Indian Takayasu Clinical Activity Score (r=0.82 [95% CI 0.46–0.95], p=0.001) and maximum wall thickness on MRI (r=0.68 [95% CI 0.31–0.87], p=0.002). SST2 PET/MRI was generally consistent with 18F-FDG PET/CT in LVV patients with contemporaneous scans (Fig. 1a, b), but with very low background signal in the brain and heart allowing for unimpeded assessment of nearby coronary, myocardial, and intracranial artery involvement. On follow-up imaging after a mean 9.3 (SD 3.2) months, clinically effective treatment for LVV was associated with a 0.49 ±SEM 0.24 (p=0.04; 22.3%) reduction in SST2 PET TBRmax, with good scan-scan repeatability in inactive LVV patients with no change in treatment (ICC 0.86, 95% CI 0.04–0.99).
SST2 localised to macrophages, pericytes, and perivascular adipocytes in inflamed arterial specimens (Fig. 2; a: H&E; b: imaging mass cytometry; arrow: SST2/CD68 co-staining). SSTR2-expressing macrophages co-expressed pro-inflammatory markers (S100A8, S100A9). Specific SST2 radioligand binding was confirmed by autoradiography in LVV specimens.
Conclusion
This is the first study to examine SST2 PET/MRI in LVV and to provide histological and gene expression data for validation. Here we show this novel approach holds major promise for diagnosis and therapeutic monitoring in LVV.
Funding Acknowledgement
Type of funding sources: Foundation. Main funding source(s): Wellcome Trust; Imperial NIHR Biomedical Research Centre
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Affiliation(s)
- J Tarkin
- University of Cambridge , Cambridge , United Kingdom
| | - A Corovic
- University of Cambridge , Cambridge , United Kingdom
| | - C Wall
- University of Cambridge , Cambridge , United Kingdom
| | - M Nus
- University of Cambridge , Cambridge , United Kingdom
| | - D Gopalan
- Imperial College Healthcare NHS Trust , London , United Kingdom
| | - Y Huang
- University of Cambridge , Cambridge , United Kingdom
| | - M Imaz
- University of Cambridge , Cambridge , United Kingdom
| | - M Zulcinski
- University of Leeds , Leeds , United Kingdom
| | - G Reynolds
- Newcastle University , Newcastle-Upon-Tyne , United Kingdom
| | - A W Morgan
- University of Leeds , Leeds , United Kingdom
| | - H F Jorgensen
- University of Cambridge , Cambridge , United Kingdom
| | - Z Mallat
- University of Cambridge , Cambridge , United Kingdom
| | - J E Peters
- Imperial College London , London , United Kingdom
| | - J H F Rudd
- University of Cambridge , Cambridge , United Kingdom
| | - J C Mason
- Imperial College London , London , United Kingdom
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5
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Taglieri N, Bonfiglioli R, Bon I, Malosso P, Corovic A, Bruno M, Le E, Granozzi B, Palmerini T, Ghetti G, Tamburello M, Bruno AG, Saia F, Tarkin JM, Rudd JHF, Calza L, Fanti S, Re MC, Galié N. Pattern of arterial inflammation and inflammatory markers in people living with HIV compared with uninfected people. J Nucl Cardiol 2022; 29:1566-1575. [PMID: 33569752 PMCID: PMC9345795 DOI: 10.1007/s12350-020-02522-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 12/25/2020] [Indexed: 11/03/2022]
Abstract
STUDY DESIGN To compare arterial inflammation (AI) between people living with HIV (PLWH) and uninfected people as assessed by 18F-Fluorodeoxyglucose (18F-FDG)-positron emission tomography (PET). METHODS We prospectively enrolled 20 PLWH and 20 uninfected people with no known cardiovascular disease and at least 3 traditional cardiovascular risk factors. All patients underwent 18F-FDG-PET/computed tomography (CT) of the thorax and neck. Biomarkers linked to inflammation and atherosclerosis were also determined. The primary outcome was AI in ascending aorta (AA) measured as mean maximum target-to-background ratio (TBRmax). The independent relationships between HIV status and both TBRmax and biomarkers were evaluated by multivariable linear regression adjusted for body mass index, creatinine, statin therapy, and atherosclerotic cardiovascular 10-year estimated risk (ASCVD). RESULTS Unadjusted mean TBRmax in AA was slightly higher but not statistically different (P = .18) in PLWH (2.07; IQR 1.97, 2.32]) than uninfected people (2.01; IQR 1.85, 2.16]). On multivariable analysis, PLWH had an independent risk of increased mean log-TBRmax in AA (coef = 0.12; 95%CI 0.01,0.22; P = .032). HIV infection was independently associated with higher values of interleukin-10 (coef = 0.83; 95%CI 0.34, 1.32; P = .001), interferon-γ (coef. = 0.90; 95%CI 0.32, 1.47; P = .003), and vascular cell adhesion molecule-1 (VCAM-1) (coef. = 0.75; 95%CI: 0.42, 1.08, P < .001). CONCLUSIONS In patients with high cardiovascular risk, HIV status was an independent predictor of increased TBRmax in AA. PLWH also had an increased independent risk of IFN-γ, IL-10, and VCAM-1 levels.
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Affiliation(s)
- Nevio Taglieri
- Division of Cardiology, Department of Experimental Diagnostic and Specialty Medicine, IRCCS Policlinico di St.Orsola, Alma Mater Studiorum-University of Bologna, Via Massarenti 9, 40138, Bologna, Italy.
| | - Rachele Bonfiglioli
- Division of Nuclear Medicine, Department of Experimental Diagnostic and Specialty Medicine, IRCCS Policlinico di St. Orsola, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Isabella Bon
- Division of Microbiology, Department of Experimental Diagnostic and Specialty Medicine, IRCCS Policlinico di St. Orsola, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Pietro Malosso
- Department of Medical and Surgical Sciences, Clinics of Infectious Diseases, IRCCS Policlinico di St. Orsola, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Andrej Corovic
- Division of Cardiovascular Medicine, Addenbrookes Hospital, University of Cambridge, Cambridge, UK
| | - Matteo Bruno
- Division of Cardiology, Department of Experimental Diagnostic and Specialty Medicine, IRCCS Policlinico di St.Orsola, Alma Mater Studiorum-University of Bologna, Via Massarenti 9, 40138, Bologna, Italy
| | - Elizabeth Le
- Division of Cardiovascular Medicine, Addenbrookes Hospital, University of Cambridge, Cambridge, UK
| | - Bianca Granozzi
- Department of Medical and Surgical Sciences, Clinics of Infectious Diseases, IRCCS Policlinico di St. Orsola, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Tullio Palmerini
- Division of Cardiology, Department of Experimental Diagnostic and Specialty Medicine, IRCCS Policlinico di St.Orsola, Alma Mater Studiorum-University of Bologna, Via Massarenti 9, 40138, Bologna, Italy
| | - Gabriele Ghetti
- Division of Cardiology, Department of Experimental Diagnostic and Specialty Medicine, IRCCS Policlinico di St.Orsola, Alma Mater Studiorum-University of Bologna, Via Massarenti 9, 40138, Bologna, Italy
| | - Martina Tamburello
- Division of Microbiology, Department of Experimental Diagnostic and Specialty Medicine, IRCCS Policlinico di St. Orsola, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Antonio Giulio Bruno
- Division of Cardiology, Department of Experimental Diagnostic and Specialty Medicine, IRCCS Policlinico di St.Orsola, Alma Mater Studiorum-University of Bologna, Via Massarenti 9, 40138, Bologna, Italy
| | - Francesco Saia
- Division of Cardiology, Department of Experimental Diagnostic and Specialty Medicine, IRCCS Policlinico di St.Orsola, Alma Mater Studiorum-University of Bologna, Via Massarenti 9, 40138, Bologna, Italy
| | - Jason M Tarkin
- Division of Cardiovascular Medicine, Addenbrookes Hospital, University of Cambridge, Cambridge, UK
| | - James H F Rudd
- Division of Cardiovascular Medicine, Addenbrookes Hospital, University of Cambridge, Cambridge, UK
| | - Leonardo Calza
- Department of Medical and Surgical Sciences, Clinics of Infectious Diseases, IRCCS Policlinico di St. Orsola, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Stefano Fanti
- Division of Nuclear Medicine, Department of Experimental Diagnostic and Specialty Medicine, IRCCS Policlinico di St. Orsola, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Maria Carla Re
- Division of Microbiology, Department of Experimental Diagnostic and Specialty Medicine, IRCCS Policlinico di St. Orsola, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Nazzareno Galié
- Division of Cardiology, Department of Experimental Diagnostic and Specialty Medicine, IRCCS Policlinico di St.Orsola, Alma Mater Studiorum-University of Bologna, Via Massarenti 9, 40138, Bologna, Italy
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6
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Evans NR, Tarkin JM, Le EP, Sriranjan RS, Corovic A, Warburton EA, Rudd JH. Integrated cardiovascular assessment of atherosclerosis using PET/MRI. Br J Radiol 2020; 93:20190921. [PMID: 32238077 DOI: 10.1259/bjr.20190921] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Atherosclerosis is a systemic inflammatory disease typified by the development of lipid-rich atheroma (plaques), the rupture of which are a major cause of myocardial infarction and stroke. Anatomical evaluation of the plaque considering only the degree of luminal stenosis overlooks features associated with vulnerable plaques, such as high-risk morphological features or pathophysiology, and hence risks missing vulnerable or ruptured non-stenotic plaques. Consequently, there has been interest in identifying these markers of vulnerability using either MRI for morphology, or positron emission tomography (PET) for physiological processes involved in atherogenesis. The advent of hybrid PET/MRI scanners offers the potential to combine the strengths of PET and MRI to allow comprehensive assessment of the atherosclerotic plaque. This review will discuss the principles and technical aspects of hybrid PET/MRI assessment of atherosclerosis, and consider how combining the complementary modalities of PET and MRI has already furthered our understanding of atherogenesis, advanced drug development, and how it may hold potential for clinical application.
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Affiliation(s)
- Nicholas R Evans
- Department of Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Jason M Tarkin
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Elizabeth Pv Le
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Rouchelle S Sriranjan
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Andrej Corovic
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Elizabeth A Warburton
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, United Kingdom
| | - James Hf Rudd
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, United Kingdom
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7
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Martinez Naharro A, Kotecha T, Gonzalez-Lopez E, Corovic A, Anderson S, Chacko L, Brown J, Knight DS, Baksi AJ, Moon JC, Kellman P, Garcia-Pavia P, Gillmore J, Hawkins P, Fontana M. 549High prevalence of intracardiac thrombi in cardiac amyloidosis. Eur Heart J Cardiovasc Imaging 2019. [DOI: 10.1093/ehjci/jez125] [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] [Indexed: 11/14/2022] Open
Affiliation(s)
- A Martinez Naharro
- University College London, CMR Unit at Royal Free Hospital, London, United Kingdom of Great Britain & Northern Ireland
| | - T Kotecha
- University College London, CMR Unit at Royal Free Hospital, London, United Kingdom of Great Britain & Northern Ireland
| | - E Gonzalez-Lopez
- University Hospital Puerta de Hierro Majadahonda, Department of Cardiology, Madrid, Spain
| | - A Corovic
- University College London, CMR Unit at Royal Free Hospital, London, United Kingdom of Great Britain & Northern Ireland
| | - S Anderson
- University College London, CMR Unit at Royal Free Hospital, London, United Kingdom of Great Britain & Northern Ireland
| | - L Chacko
- University College London, CMR Unit at Royal Free Hospital, London, United Kingdom of Great Britain & Northern Ireland
| | - J Brown
- University College London, CMR Unit at Royal Free Hospital, London, United Kingdom of Great Britain & Northern Ireland
| | - D S Knight
- University College London, CMR Unit at Royal Free Hospital, London, United Kingdom of Great Britain & Northern Ireland
| | - A J Baksi
- Royal Brompton Hospital, London, United Kingdom of Great Britain & Northern Ireland
| | - J C Moon
- Barts Health NHS Trust, London, United Kingdom of Great Britain & Northern Ireland
| | - P Kellman
- National Institutes of Health, National Heart, Lung and Blood Institute, Bethesda, United States of America
| | - P Garcia-Pavia
- University Hospital Puerta de Hierro Majadahonda, Department of Cardiology, Madrid, Spain
| | - J Gillmore
- University College London, CMR Unit at Royal Free Hospital, London, United Kingdom of Great Britain & Northern Ireland
| | - P Hawkins
- University College London, CMR Unit at Royal Free Hospital, London, United Kingdom of Great Britain & Northern Ireland
| | - M Fontana
- University College London, CMR Unit at Royal Free Hospital, London, United Kingdom of Great Britain & Northern Ireland
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8
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Corovic A, Kelly S, Markus HS. Cerebral amyloid angiopathy associated with inflammation: A systematic review of clinical and imaging features and outcome. Int J Stroke 2017; 13:257-267. [DOI: 10.1177/1747493017741569] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Background Cerebral amyloid angiopathy associated with inflammation is an increasingly recognized condition, characterized by an inflammatory response to the vascular deposits of β-amyloid within the brain that are the hallmark of cerebral amyloid angiopathy. Two main patterns of this inflammatory response have been identified to date: one involving a perivascular inflammatory cell infiltrate (cerebral amyloid angiopathy-related inflammation); the other a transmural vasculitic process (A-beta related angiitis). Unlike cerebral amyloid angiopathy itself, which predisposes to intracerebral hemorrhage and has no known treatment, cerebral amyloid angiopathy associated with inflammation typically presents in diverse ways and diagnosis may be challenging and delayed. Aims We sought to summarize the clinical features, imaging appearances and available data on outcome and treatment responses, using information derived from a systematic review of pathologically proven cases of cerebral amyloid angiopathy associated with inflammation. Summary of review We identified 213 distinct pathologically proven cases of cerebral amyloid angiopathy-related inflammation/A-beta related angiitis, from 104 publications. The clinical presentation, imaging features, pathology, treatment, and outcomes of cerebral amyloid angiopathy associated with inflammation are described. Conclusions Cerebral amyloid angiopathy associated with inflammation is an important and increasingly recognized clinical condition, which affects the older patient population and presents most commonly with cognitive decline, seizures, and headaches. Future research is required to develop and validate diagnostic criteria and determine optimum treatment strategies.
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Affiliation(s)
- Andrej Corovic
- Department of Stroke Medicine, Addenbrookes Hospital, Cambridge, UK
| | - Siobhan Kelly
- Department of Stroke Medicine, Addenbrookes Hospital, Cambridge, UK
| | - Hugh S Markus
- Department of Clinical Neuroscience, University of Cambridge, Cambridge, UK
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9
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Liu X, Wong A, Kadri SR, Corovic A, O’Donovan M, Lao-Sirieix P, Lovat LB, Burnham RW, Fitzgerald RC. Gastro-esophageal reflux disease symptoms and demographic factors as a pre-screening tool for Barrett's esophagus. PLoS One 2014; 9:e94163. [PMID: 24736597 PMCID: PMC3988048 DOI: 10.1371/journal.pone.0094163] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Accepted: 03/11/2014] [Indexed: 02/07/2023] Open
Abstract
Background Barrett’s esophagus (BE) occurs as consequence of reflux and is a risk factor for esophageal adenocarcinoma. The current “gold-standard” for diagnosing BE is endoscopy which remains prohibitively expensive and impractical as a population screening tool. We aimed to develop a pre-screening tool to aid decision making for diagnostic referrals. Methodology/Principal Findings A prospective (training) cohort of 1603 patients attending for endoscopy was used for identification of risk factors to develop a risk prediction model. Factors associated with BE in the univariate analysis were selected to develop prediction models that were validated in an independent, external cohort of 477 non-BE patients referred for endoscopy with symptoms of reflux or dyspepsia. Two prediction models were developed separately for columnar lined epithelium (CLE) of any length and using a stricter definition of intestinal metaplasia (IM) with segments ≥2 cm with areas under the ROC curves (AUC) of 0.72 (95%CI: 0.67–0.77) and 0.81 (95%CI: 0.76–0.86), respectively. The two prediction models included demographics (age, sex), symptoms (heartburn, acid reflux, chest pain, abdominal pain) and medication for “stomach” symptoms. These two models were validated in the independent cohort with AUCs of 0.61 (95%CI: 0.54–0.68) and 0.64 (95%CI: 0.52–0.77) for CLE and IM≥2 cm, respectively. Conclusions We have identified and validated two prediction models for CLE and IM≥2 cm. Both models have fair prediction accuracies and can select out around 20% of individuals unlikely to benefit from investigation for Barrett’s esophagus. Such prediction models have the potential to generate useful cost-savings for BE screening among the symptomatic population.
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Affiliation(s)
- Xinxue Liu
- MRC Cancer Unit, University of Cambridge, Cambridge, United Kingdom
| | - Angela Wong
- MRC Cancer Unit, University of Cambridge, Cambridge, United Kingdom
| | | | - Andrej Corovic
- MRC Cancer Unit, University of Cambridge, Cambridge, United Kingdom
| | - Maria O’Donovan
- Department of Histopathology, Addenbrooke’s Hospital, Cambridge, United Kingdom
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10
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Lao-Sirieix P, Corovic A, Jankowski J, Lowe A, Triadafilopoulos G, Fitzgerald RC. Physiological and molecular analysis of acid loading mechanisms in squamous and columnar-lined esophagus. Dis Esophagus 2008; 21:529-38. [PMID: 18840137 DOI: 10.1111/j.1442-2050.2007.00807.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Barrett's esophagus (BE) may be an adaptive cellular response to repeated acid exposure. The aims of this study were to compare intracellular acid loading in BE cells with normal squamous esophageal cells. Primary squamous and BE cells were obtained endoscopically and cultured for up to 24 h. Barrett's adenocarcinoma cell lines TE7 and OE-33 were compared with a normal esophageal (NE) cell line OE-21. Extracellular pH was lowered to 6.0 using HCl; specific ion exchangers were blocked pharmacologically and pH microfluorimetry was performed using 2'7'-bis(carboxyethyl)-5(6)-carboxyfluorescein. The effect of prolonged acid preincubations and repeated acid exposure on acid loading and recovery were examined. Acid loading was greater in primary BE than NE cells (DeltapHi -0.22 +/- 0.08 vs.-0.13 +/- 0.01) and maximal in the BE carcinoma cell line TE7 (DeltapHi -0.30 +/- 0.01). Whereas TE7 cells were able to recover fully from repeated acid exposure, OE-21 cells remained profoundly acidic. BE primary and transformed cells utilize DIDS inhibitable sodium-independent chloride/bicarbonate exchange as well as sodium/hydrogen ion exchange for acid loading. In contrast, SE only requires sodium-independent chloride/bicarbonate exchange for acidification. The degree of acid loading is greater in BE than NE cells and it occurs via dual ion exchangers similar to gastric mucosa. Only Barrett's epithelial cells can maintain a physiological pHi following prolonged and repeated reflux exposure, which may confer a teleological advantage.
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Affiliation(s)
- P Lao-Sirieix
- Cancer Cell Unit, Hutchison, MRC Research Center, Cambridge, UK
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11
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Hegewisch-Becker S, Gruber Y, Corovic A, Pichlmeier U, Atanackovic D, Nierhaus A, Hossfeld DK. Whole-body hyperthermia (41.8 degrees C) combined with bimonthly oxaliplatin, high-dose leucovorin and 5-fluorouracil 48-hour continuous infusion in pretreated metastatic colorectal cancer: a phase II study. Ann Oncol 2002; 13:1197-204. [PMID: 12181242 DOI: 10.1093/annonc/mdf216] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Second- and third-line treatments remain a challenge in advanced colorectal cancer. Studies of bimonthly regimens of high-dose leucovorin (LV) and 5-fluorouracil (5-FU) by continuous infusion combined with oxaliplatin (L-OHP) have shown encouraging response rates in patients not responding to a bimonthly LV/5-FU regimen. Hyperthermic enhancement of L-OHP efficiency by increased DNA adduct formation has been demonstrated in vitro. This study was designed to address feasibility, toxicity and efficacy issues of whole-body hyperthermia (WBH) as an adjunct to L-OHP/LV/5-FU in pretreated patients after progression to first- and second-line treatments with LV/5-FU by continuous infusion and irinotecan. PATIENTS AND METHODS Forty-four patients with advanced colorectal cancer, who had progressed during or within 3 months after completion of chemotherapy with LV/5-FU 24-h infusion (LV/5-FU(24h)) (eight patients) or irinotecan combined with or after LV/5-FU(24h )(36 patients), were treated with L-OHP 85 mg/m(2), 2-h intravenous (i.v.) infusion, followed by LV 200 mg/m(2), 1-h i.v. infusion, and 5-FU 3 g/m(2), 48-h continuous infusion. Every second cycle of the biweekly regimen was combined with WBH, thus allowing a comparison of toxicity with and without WBH in the same patient. Whole-body hyperthermia was administered by a humidified radiant heat device. The target temperature of 41.8 degrees C was maintained for 60 min. L-OHP (2-h infusion) was started at a core body temperature of 39 degrees C. RESULTS All patients could be evaluated for toxicity, and 41 patients were evaluable for response. A total of 273 L-OHP-containing regimens were administered, 130 with and 143 without WBH. Hyperthermic treatment combined with L-OHP/LV/5-FU showed no unexpected toxicities. WHO grade 3 toxicities were rare and evenly balanced between cycles given with or without WBH. One early death occurred due to sepsis and tumor lysis. The overall response rate was 20%, with two complete and six partial responses. Twenty-three patients (56%) had stable disease and nine patients (22%) progressive disease. With a median observation time of 70 weeks, the median time to progression was 21 weeks [95% confidence interval (CI) 17-25 weeks] and the median survival was 50 weeks (95% CI 39-61 weeks) from the start of therapy. CONCLUSIONS This trial suggests some advantage of combining L-OHP/LV/5-FU with WBH. Results compare favorably with the activity of similar regimens without WBH in less extensively pretreated patients. These data support further evaluation and warrant phase III studies.
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Affiliation(s)
- S Hegewisch-Becker
- Department of Oncology/Hematology, University Hospital Hamburg-Eppendorf, Hamburg, Germany.
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von Laer D, Corovic A, Vogt B, Herwig U, Roscher S, Fehse B, Baum C. Amphotropic and VSV-G-pseudotyped retroviral vectors transduce human hematopoietic progenitor cells with similar efficiency. Bone Marrow Transplant 2000; 25 Suppl 2:S75-9. [PMID: 10933195 DOI: 10.1038/sj.bmt.1702360] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [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: 11/08/2022]
Abstract
One restriction of retroviral gene transfer into hematopoietic stem cells is the low level of amphotropic virus receptor. In the present study, we examined whether retroviral vectors pseudotyped with the G-protein of vesicular stomatitis virus (VSV) can overcome this restriction. Human progenitor cells purified by magnetic beads and cell sorting were transduced with an amphotropic or VSV-G-pseudotyped retroviral vector containing the truncated human nerve growth factor receptor as a marker gene. Cells were prestimulated with flt-3 ligand, stem cell factor, and interleukin-3 and transduced on fibronectin. Marker gene expression was analyzed by flow cytometry. Transduction efficiencies of amphotropic and VSV-G-pseudotyped virus for CD34+ cells did not differ significantly. Gene transfer into CD34+CD38- cells, which are enriched in more immature progenitors, was not restricted and transfer efficiencies for this subset were also similar for both pseudotypes. The addition of fibronectin improved gene transfer with the amphotropic vector considerably (5- to 19.3-fold, mean 12.6), while the effect on the VSV-G-pseudotype was far less pronounced (1- to 3.9-fold, mean 2.1, P = 0.04). In conclusion, high levels of gene transfer to human hematopoietic progenitors were achieved with an optimized transduction protocol, and transduction efficiencies could not be improved further by the use of VSV-G-pseudotypes.
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Affiliation(s)
- D von Laer
- Heinrich-Pette-Institut für Experimentelle Virologie und Immunologie an der Universität Hamburg, Germany
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von Laer D, Corovic A, Vogt B, Fehse B, Roscher S, Rimek A, Baum C, Ostertag W. Loss of CD38 antigen on CD34+CD38+ cells during short-term culture. Leukemia 2000; 14:947-8. [PMID: 10803533 DOI: 10.1038/sj.leu.2401740] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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