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Miyagawa M, Kojima K, Takahashi K, Nakajima Y, Migita S, Mizobuchi S, Tanaka Y, Fukumoto K, Arai R, Morikawa T, Mineki T, Murata N, Sudo M, Fukamachi D, Okumura Y. Association Between Aortic Wall Parameters on Multidetector Computed Tomography and Ruptured Plaques By Nonobstructive General Angioscopy. J Am Heart Assoc 2024; 13:e033233. [PMID: 38497463 PMCID: PMC11010013 DOI: 10.1161/jaha.123.033233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 02/20/2024] [Indexed: 03/19/2024]
Abstract
BACKGROUND Nonobstructive general angioscopy (NOGA) can identify vulnerable plaques in the aortic lumen that serve as potential risk factors for cardiovascular events such as embolism. However, the association between computed tomography (CT) images and vulnerable plaques detected on NOGA remains unknown. METHODS AND RESULTS We investigated 101 patients (67±11 years; women, 13.8%) who underwent NOGA and contrast-enhanced CT before or after 90 days in our hospital. On CT images, the aortic wall thickness, aortic wall area (AWA), and AWA in the vascular area were measured at the thickest point from the 6th to the 12th thoracic vertebral levels. Furthermore, the association between these measurements and the presence or absence of NOGA-derived aortic plaque ruptures (PRs) at the same vertebral level was assessed. NOGA detected aortic PRs in the aortic lumens at 145 (22.1%) of the 656 vertebral levels. The presence of PRs was significantly associated with greater aortic wall thickness (3.3±1.7 mm versus 2.1±1.2 mm), AWA (1.33±0.68 cm2 versus 0.89±0.49 cm2), and AWA in the vascular area (23.2%±9.3% versus 17.2%±7.6%) (P<0.001 for all) on the CT scans compared with the absence of PRs. The frequency of PRs significantly increased as the aortic wall thickness increased. Notably, a few NOGA-derived PRs were detected on CT in near-normal intima. CONCLUSIONS The presence of NOGA-derived PRs was strongly associated with increased aortic wall thickness, AWA, and AWA in the vascular area, measured using CT. NOGA can detect PRs in the intima that appear almost normal on CT scans.
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Affiliation(s)
- Masatsugu Miyagawa
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
| | - Keisuke Kojima
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
| | - Kurara Takahashi
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
| | - Yuki Nakajima
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
| | - Shohei Migita
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
| | - Saki Mizobuchi
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
| | - Yudai Tanaka
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
| | - Katsunori Fukumoto
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
| | - Riku Arai
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
| | - Tomoyuki Morikawa
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
| | - Takashi Mineki
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
| | - Nobuhiro Murata
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
| | - Mitsumasa Sudo
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
| | - Daisuke Fukamachi
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
| | - Yasuo Okumura
- Division of Cardiology, Department of MedicineNihon University School of MedicineTokyoJapan
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Laukka D, Paturi J, Rahi M, Saraste A, Parkkola R, Kivelev J, Gardberg M, Kuhmonen J, Rinne J. PET imaging of unruptured intracranial aneurysm inflammation (PET-IA) study: a feasibility study protocol. BMJ Open 2024; 14:e076764. [PMID: 38382960 PMCID: PMC10882366 DOI: 10.1136/bmjopen-2023-076764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 01/26/2024] [Indexed: 02/23/2024] Open
Abstract
INTRODUCTION Positron emission tomography (PET) imaging can be used to evaluate arterial wall inflammation in extracranial vascular diseases. However, the application of PET imaging in unruptured intracranial aneurysms (UIA) remains unexplored. Our objective is to investigate feasibility of PET imaging using 18F-FDG and 68Ga-DOTANOC tracers to evaluate arterial wall inflammation in UIA. METHODS AND ANALYSIS This PET imaging feasibility study will enrol patients scheduled for surgical treatment of UIA. The study subjects will undergo PET imaging of the intracranial arteries within 1 month before planned surgery. The imaging protocol includes 18F-FDG PET MRI, MRA with gadolinium enhancement, and 68Ga-DOTANOC PET CT. The study will also involve preoperative blood samples, intraoperative cerebrospinal fluid (CSF) samples, and aneurysm sac biopsy. Planned sample size is at least 18 patients. Primary outcome is uptake of 18F-FDG or 68Ga-DOTANOC in intracranial arterial aneurysms compared with contralateral normal vessel as maximum standardised uptake value or target-to-blood pool ratio and correlation of uptake of 18F-FDG or 68Ga-DOTANOC to aneurysm histological findings. Secondary outcomes include estimating the correlations between uptake of 18F-FDG or 68Ga-DOTANOC and histological findings with blood and CSF miRNA-levels, arterial wall enhancement in gadolinium enhanced MRA, aneurysm size and shape, smoking, hypertension, and location of the aneurysm. ETHICS AND DISSEMINATION This study is approved by the Human Research Ethics Committee of the Hospital District of Southwest Finland, Finnish Medicines Agency Fimea, and Turku University Hospital. Findings will be disseminated through peer-reviewed journal articles and presentations at national and international conferences. TRIAL REGISTRATION NUMBER NCT04715503.
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Affiliation(s)
- Dan Laukka
- Clinical Neurosciences, University of Turku, Turku, Finland
- Neurosurgery, Neurocenter, Turku University Hospital, Turku, Finland
| | - Jooa Paturi
- Clinical Neurosciences, University of Turku, Turku, Finland
- Neurosurgery, Neurocenter, Turku University Hospital, Turku, Finland
| | - Melissa Rahi
- Clinical Neurosciences, University of Turku, Turku, Finland
- Neurosurgery, Neurocenter, Turku University Hospital, Turku, Finland
| | - Antti Saraste
- Turku PET Centre, Turku, Finland
- Heart Centre, Turku University Hospital, Turku, Finland
| | - Riitta Parkkola
- Department of Radiology, University of Turku, Turku, Finland
| | - Juri Kivelev
- Clinical Neurosciences, University of Turku, Turku, Finland
- Neurosurgery, Neurocenter, Turku University Hospital, Turku, Finland
| | - Maria Gardberg
- Department of Pathology, Turku University Hospital, Turku, Varsinais-Suomi, Finland
| | - Johanna Kuhmonen
- Clinical Neurosciences, University of Turku, Turku, Finland
- Neurosurgery, Neurocenter, Turku University Hospital, Turku, Finland
| | - Jaakko Rinne
- Clinical Neurosciences, University of Turku, Turku, Finland
- Neurosurgery, Neurocenter, Turku University Hospital, Turku, Finland
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Chan P, Sadeghi MM. Psychological stress and vessel wall inflammation: Opportunity of reducing cardiovascular risk in people with HIV. Brain Behav Immun 2024; 115:118-119. [PMID: 37820976 DOI: 10.1016/j.bbi.2023.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Accepted: 10/08/2023] [Indexed: 10/13/2023] Open
Affiliation(s)
- Phillip Chan
- Department of Neurology, Yale School of Medicine, New Haven, CT, USA; Yale Center for Brain and Mind Health, Yale School of Medicine, New Haven, CT, USA.
| | - Mehran M Sadeghi
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale School of Medicine, New Haven, CT, USA; Veterans Affairs Connecticut Healthcare System, West Haven, CT, USA
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Debono S, Nash J, Fletcher AJ, Syed M, van Beek EJR, Williams MC, Falah O, Tambyraja A, Dweck MR, Newby DE, Forsythe RO. Aortic sodium [ 18F]fluoride uptake following endovascular aneurysm repair. Heart 2023; 109:1677-1682. [PMID: 37164479 PMCID: PMC10646867 DOI: 10.1136/heartjnl-2023-322514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 04/25/2023] [Indexed: 05/12/2023] Open
Abstract
OBJECTIVE In patients with abdominal aortic aneurysms, sodium [18F]fluoride positron emission tomography identifies aortic microcalcification and disease activity. Increased uptake is associated with aneurysm expansion and adverse clinical events. The effect of endovascular aneurysm repair (EVAR) on aortic disease activity and sodium [18F]fluoride uptake is unknown. This study aimed to compare aortic sodium [18F]fluoride uptake before and after treatment with EVAR. METHODS In a preliminary proof-of-concept cohort study, preoperative and post-operative sodium [18F]fluoride positron emission tomography-computed tomography angiography was performed in patients with an infrarenal abdominal aortic aneurysm undergoing EVAR according to current guideline-directed size treatment thresholds. Regional aortic sodium [18F]fluoride uptake was assessed using aortic microcalcification activity (AMA): a summary measure of mean aortic sodium [18F]fluoride uptake. RESULTS Ten participants were recruited (76±6 years) with a mean aortic diameter of 57±2 mm at time of EVAR. Mean time from EVAR to repeat scan was 62±21 months. Prior to EVAR, there was higher abdominal aortic AMA when compared with the thoracic aorta (AMA 1.88 vs 1.2; p<0.001). Following EVAR, sodium [18F]fluoride uptake was markedly reduced in the suprarenal (ΔAMA 0.62, p=0.03), neck (ΔAMA 0.72, p=0.02) and body of the aneurysm (ΔAMA 0.69, p=0.02) while it remained unchanged in the thoracic aorta (ΔAMA 0.11, p=0.41). CONCLUSIONS EVAR is associated with a reduction in AMA within the stented aortic segment. This suggests that EVAR can modify aortic disease activity and aortic sodium [18F]fluoride uptake is a promising non-invasive surrogate measure of aneurysm disease activity.
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Affiliation(s)
- Samuel Debono
- British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Jennifer Nash
- British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Alexander J Fletcher
- British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
- Department of Child Health, University of Glasgow, Glasgow, UK
| | - Maaz Syed
- British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Edwin J R van Beek
- British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
- Edinburgh Imaging Facility, Queens Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Michelle Claire Williams
- British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
- Edinburgh Imaging Facility, Queens Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Orwa Falah
- The Edinburgh Vascular Service, Royal Infirmary of Edinburgh, NHS Lothian, Edinburgh, UK
| | - Andrew Tambyraja
- The Edinburgh Vascular Service, Royal Infirmary of Edinburgh, NHS Lothian, Edinburgh, UK
| | - Marc R Dweck
- British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - David E Newby
- British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Rachael O Forsythe
- British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
- The Edinburgh Vascular Service, Royal Infirmary of Edinburgh, NHS Lothian, Edinburgh, UK
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5
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Contrast-enhanced CT radiomics improves the prediction of abdominal aortic aneurysm progression. Eur Radiol 2023; 33:3444-3454. [PMID: 36920519 DOI: 10.1007/s00330-023-09490-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 12/06/2022] [Accepted: 01/27/2023] [Indexed: 03/16/2023]
Abstract
OBJECTIVES To determine if three-dimensional (3D) radiomic features of contrast-enhanced CT (CECT) images improve prediction of rapid abdominal aortic aneurysm (AAA) growth. METHODS This longitudinal cohort study retrospectively analyzed 195 consecutive patients (mean age, 72.4 years ± 9.1) with a baseline CECT and a subsequent CT or MR at least 6 months later. 3D radiomic features were measured for 3 regions of the AAA, viz. the vessel lumen only; the intraluminal thrombus (ILT) and aortic wall only; and the entire AAA sac (lumen, ILT, and wall). Multiple machine learning (ML) models to predict rapid growth, defined as the upper tercile of observed growth (> 0.25 cm/year), were developed using data from 60% of the patients. Diagnostic accuracy was evaluated using the area under the receiver operating characteristic curve (AUC) in the remaining 40% of patients. RESULTS The median AAA maximum diameter was 3.9 cm (interquartile range [IQR], 3.3-4.4 cm) at baseline and 4.4 cm (IQR, 3.7-5.4 cm) at the mean follow-up time of 3.2 ± 2.4 years (range, 0.5-9 years). A logistic regression model using 7 radiomic features of the ILT and wall had the highest AUC (0.83; 95% confidence interval [CI], 0.73-0.88) in the development cohort. In the independent test cohort, this model had a statistically significantly higher AUC than a model including maximum diameter, AAA volume, and relevant clinical factors (AUC = 0.78, 95% CI, 0.67-0.87 vs AUC = 0.69, 95% CI, 0.57-0.79; p = 0.04). CONCLUSION A radiomics-based method focused on the ILT and wall improved prediction of rapid AAA growth from CECT imaging. KEY POINTS • Radiomic analysis of 195 abdominal CECT revealed that an ML-based model that included textural features of intraluminal thrombus (if present) and aortic wall improved prediction of rapid AAA progression compared to maximum diameter. • Predictive accuracy was higher when radiomic features were obtained from the thrombus and wall as opposed to the entire AAA sac (including lumen), or the lumen alone. • Logistic regression of selected radiomic features yielded similar accuracy to predict rapid AAA progression as random forests or support vector machines.
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Kessler V, Klopf J, Eilenberg W, Neumayer C, Brostjan C. AAA Revisited: A Comprehensive Review of Risk Factors, Management, and Hallmarks of Pathogenesis. Biomedicines 2022; 10:94. [PMID: 35052774 PMCID: PMC8773452 DOI: 10.3390/biomedicines10010094] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 12/30/2021] [Indexed: 01/27/2023] Open
Abstract
Despite declining incidence and mortality rates in many countries, the abdominal aortic aneurysm (AAA) continues to represent a life-threatening cardiovascular condition with an overall prevalence of about 2-3% in the industrialized world. While the risk of AAA development is considerably higher for men of advanced age with a history of smoking, screening programs serve to detect the often asymptomatic condition and prevent aortic rupture with an associated death rate of up to 80%. This review summarizes the current knowledge on identified risk factors, the multifactorial process of pathogenesis, as well as the latest advances in medical treatment and surgical repair to provide a perspective for AAA management.
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Affiliation(s)
| | | | | | | | - Christine Brostjan
- Department of General Surgery, Division of Vascular Surgery, Medical University of Vienna, Vienna General Hospital, 1090 Vienna, Austria; (V.K.); (J.K.); (W.E.); (C.N.)
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7
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Syed MBJ, Fletcher AJ, Dweck MR. Imaging cellular activity and proliferation in the aortic wall. J Nucl Cardiol 2021; 28:1972-1975. [PMID: 31832885 DOI: 10.1007/s12350-019-01987-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 11/30/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Maaz B J Syed
- British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK.
| | - Alexander J Fletcher
- British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - Marc R Dweck
- British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
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8
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Jones GT, Drinkwater B, Blake-Barlow A, Hill GB, Williams MJA, Krysa J, van Rij AM, Coffey S. Both Small and Large Infrarenal Aortic Size is Associated with an Increased Prevalence of Ischaemic Heart Disease. Eur J Vasc Endovasc Surg 2020; 60:594-601. [PMID: 32753305 DOI: 10.1016/j.ejvs.2020.06.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 06/03/2020] [Accepted: 06/16/2020] [Indexed: 11/17/2022]
Abstract
OBJECTIVE Past studies have suggested a potential "J shaped" relationship between infrarenal aortic diameter and both cardiovascular disease (CVD) prevalence and all cause mortality. However, screening programmes have focused primarily on large (aneurysmal) aortas. In addition, aortic diameter is rarely adjusted for body size, which is particularly important for women. This study aimed to investigate specifically the relationship between body size adjusted infrarenal aortic diameter and baseline prevalence of CVD. METHODS A retrospective analysis was performed on a total of 4882 elderly (>50 years) participants (mean age 69.4 ± 8.9 years) for whom duplex ultrasound to assess infrarenal abdominal aortic diameters had been performed. History of CVDs, including ischaemic heart disease (IHD), and associated risk factors were collected at the time of assessment. A derivation cohort of 1668 participants was used to select cut offs at the lower and upper 12.5% tails of the aortic size distributions (aortic size index of <0.84 and >1.2, respectively), which was then tested in a separate cohort. RESULTS A significantly elevated prevalence of CVD, and specifically IHD, was observed in participants with both small and large aortas. These associations remained significant following adjustment for age, sex, diabetes, hypertension, dyslipidaemia, obesity (body mass index), and smoking. CONCLUSION The largest and smallest infrarenal aortic sizes were both associated with prevalence of IHD. In addition to identifying those with aneurysmal disease, it is hypothesised that screening programmes examining infrarenal aortic size may also have the potential to improve global CVD risk prediction by identifying those with small aortas.
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Affiliation(s)
- Gregory T Jones
- Department of Surgical Sciences, Dunedin Medical Campus, University of Otago, Dunedin, New Zealand.
| | - Ben Drinkwater
- Department of Surgical Sciences, Dunedin Medical Campus, University of Otago, Dunedin, New Zealand
| | - Ashton Blake-Barlow
- Department of Medicine, Dunedin Medical Campus, University of Otago, Dunedin, New Zealand
| | - Geraldine B Hill
- Department of Surgical Sciences, Dunedin Medical Campus, University of Otago, Dunedin, New Zealand
| | - Michael J A Williams
- Department of Medicine, Dunedin Medical Campus, University of Otago, Dunedin, New Zealand
| | - Jolanta Krysa
- Department of Surgical Sciences, Dunedin Medical Campus, University of Otago, Dunedin, New Zealand
| | - Andre M van Rij
- Department of Surgical Sciences, Dunedin Medical Campus, University of Otago, Dunedin, New Zealand
| | - Sean Coffey
- Department of Medicine, Dunedin Medical Campus, University of Otago, Dunedin, New Zealand
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Abstract
Aortic pathologies such as aneurysm, dissection and trauma are relatively common and potentially fatal diseases. Over the past two decades, we have experienced unprecedented technical and medical developments in the field. Despite this, there is a great need, and great opportunities, to further explore the area. In this review, we have identified important areas that need to be further studied and selected priority aortic disease trials. There is a pressing need to update the AAA natural history and the role for endovascular AAA repair as well as to define biomarkers and genetic risk factors as well as influence of gender for development and progression of aortic disease. A key limitation of contemporary treatment strategies of AAA is the lack of therapy directed at small AAA, to prevent AAA expansion and need for surgical repair, as well as to reduce the risk for aortic rupture. Currently, the most promising potential drug candidate to slow AAA growth is metformin, and RCTs to verify or reject this hypothesis are warranted. In addition, the role of endovascular treatment for ascending pathologies and for uncomplicated type B aortic dissection needs to be clarified.
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Affiliation(s)
- R L Dalman
- From the, Division of Vascular Surgery, Department of Surgery, Stanford Medicine, Stanford, CA, USA
| | - A Wanhainen
- Department of Surgical Sciences, Vascular Surgery, Uppsala University, Uppsala, Sweden
| | - K Mani
- Department of Surgical Sciences, Vascular Surgery, Uppsala University, Uppsala, Sweden
| | - B Modarai
- Academic Department of Vascular Surgery, St Thomas' Hospital, King's Health Partners, London, UK
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10
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Jabbarli R, Rauschenbach L, Dinger TF, Darkwah Oppong M, Rodemerk J, Pierscianek D, Dammann P, Junker A, Sure U, Wrede KH. In the wall lies the truth: a systematic review of diagnostic markers in intracranial aneurysms. Brain Pathol 2020; 30:437-445. [PMID: 32068920 PMCID: PMC8017992 DOI: 10.1111/bpa.12828] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 01/20/2020] [Accepted: 02/10/2020] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVE Despite recent advances in molecular biology and genetics, the development of intracranial aneurysms (IA) is still poorly understood. Elucidation of the processes occurring in the IA wall is essential for a better understanding of IA pathophysiology. We sought to analyze the current evidence from histological, molecular and genetic studies of IA. METHODS We systematically searched PubMed, Scopus, Web of Science and Cochrane Library for articles published before Mar 1, 2019 reporting on different diagnostic markers in human IA specimens. Expression of the markers in IA wall (vs. healthy arterial wall) and association with the rupture status were analyzed. The quality of the included studies and the level of the evidence for the markers were incorporated into the final data assessment. RESULTS We included 123 studies reporting on analyses of 3476 IA (median 19 IA/study) published between 1966 and 2018. Based on microscopic, biochemical, genetic and biomechanical analyses, data on 358 diagnostic targets in the IA wall were collected. We developed a scale to distribute the diagnostic markers according to their specificity for IA or healthy arterial wall, as well as for ruptured or unruptured IA. We identified different functional pathways, which might reflect the intrinsic and extrinsic processes underlying IA pathophysiology. CONCLUSIONS Multiple histological and molecular markers and the related functional pathways contributing to the development of IA might present promising targets for future therapeutic interventions. Because of small numbers of IA samples in each study, 89% of the analyzed diagnostic markers presented with the lowest level of evidence. This underlines the need for the initiation of a multi-centric prospective histological IA register for pooled data analysis.
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Affiliation(s)
- Ramazan Jabbarli
- Department of NeurosurgeryUniversity Hospital of EssenEssenGermany
| | | | | | | | - Jan Rodemerk
- Department of NeurosurgeryUniversity Hospital of EssenEssenGermany
| | | | - Philipp Dammann
- Department of NeurosurgeryUniversity Hospital of EssenEssenGermany
| | - Andreas Junker
- Clinic for NeuropathologyUniversity Hospital of EssenEssenGermany
| | - Ulrich Sure
- Department of NeurosurgeryUniversity Hospital of EssenEssenGermany
| | - Karsten H. Wrede
- Department of NeurosurgeryUniversity Hospital of EssenEssenGermany
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Yamamoto H, Wada K, Toyohara J, Tago T, Ibaraki M, Kinoshita T, Yamamoto Y, Nishiyama Y, Kudomi N. Radiosynthesis of 18F-labeled d-allose. Carbohydr Res 2019; 486:107827. [PMID: 31586720 DOI: 10.1016/j.carres.2019.107827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 09/25/2019] [Accepted: 09/26/2019] [Indexed: 10/25/2022]
Abstract
Rare sugars are defined as monosaccharides that exist in nature but are only present in limited quantities. d-Allose is a rare sugar that has been reported to have some unique physiological effects. The present study describes suitable synthetic procedures for novel rare sugars of d-allose that are 18F-labeled at the C-3 and C-6 positions and the preparation of the appropriate labeling precursors. The goal is to facilitate in vivo, noninvasive positron emission tomography (PET) investigation of the behavior of rare sugar analogs of d-allose in organs. We found five precursors that were practical for labeling, three for 3-deoxy-3-[18F]fluoro-d-allose ([18F]3FDA) and two for 6-deoxy-6-[18F]fluoro-d-allose ([18F]6FDA). With manual operation synthesis, the highest radiochemical conversion rates were 75% for [18F]3FDA with a precursor of 1,2,4,6-tetra-O-acetyl-3-O-trifluoromethanesulfonyl-β-d-glucopyranose and 69% for [18F]6FDA with a precursor of 1,2,3,4-tetra-O-acetyl-6-O-trifluoromethanesulfonyl-β-d-allopyranose. Furthermore, the practical yields of [18F]3FDA and [18F]6FDA using an automated synthesizer were also investigated. Radiochemical yields of 67% and 49% were obtained for [18F]3FDA and [18F]6FDA, respectively, in an automated synthesizer. As basic assessment of stability for use in PET scanning, high performance liquid chromatography analysis showed no decomposition of [18F]3FDA and [18F]6FDA after up to 6 h in rabbit blood plasma.
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Affiliation(s)
- Hiroyuki Yamamoto
- Department of Medical Physics, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan; Department of Radiology and Nuclear Medicine, Akita Research Institute of Brain and Blood Vessels, 6-10 Senshukubota-machi, Akita-shi, Akita, 010-0874, Japan.
| | - Kenji Wada
- Department of Chemistry for Medicine, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan
| | - Jun Toyohara
- Research Team for Neuroimaging, Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo, 173-0015, Japan
| | - Tetsuro Tago
- Research Team for Neuroimaging, Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo, 173-0015, Japan
| | - Masanobu Ibaraki
- Department of Radiology and Nuclear Medicine, Akita Research Institute of Brain and Blood Vessels, 6-10 Senshukubota-machi, Akita-shi, Akita, 010-0874, Japan
| | - Toshibumi Kinoshita
- Department of Radiology and Nuclear Medicine, Akita Research Institute of Brain and Blood Vessels, 6-10 Senshukubota-machi, Akita-shi, Akita, 010-0874, Japan
| | - Yuka Yamamoto
- Department of Radiology, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan
| | - Yoshihiro Nishiyama
- Department of Radiology, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan
| | - Nobuyuki Kudomi
- Department of Medical Physics, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan
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12
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Veit-Haibach P, Ellaban H, Farkouh ME. Editorial commentary: Imaging the aorta for inflammation: Informing practice on emerging molecular techniques. Trends Cardiovasc Med 2019; 29:449-450. [PMID: 30770175 DOI: 10.1016/j.tcm.2019.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 01/30/2019] [Indexed: 11/25/2022]
Affiliation(s)
- Patrick Veit-Haibach
- Joint Department Medical Imaging, University Health Network, University of Toronto, Toronto, ON, Canada
| | - Hassan Ellaban
- Peter Munk Cardiac Centre and the Heart and Stroke Richard Lewar Centre, University of Toronto, Toronto, ON, Canada
| | - Michael E Farkouh
- Peter Munk Cardiac Centre and the Heart and Stroke Richard Lewar Centre, University of Toronto, Toronto, ON, Canada.
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