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Lengyel B, Magyar-Stang R, Pál H, Debreczeni R, Sándor ÁD, Székely A, Gyürki D, Csippa B, István L, Kovács I, Sótonyi P, Mihály Z. Non-Invasive Tools in Perioperative Stroke Risk Assessment for Asymptomatic Carotid Artery Stenosis with a Focus on the Circle of Willis. J Clin Med 2024; 13:2487. [PMID: 38731014 PMCID: PMC11084304 DOI: 10.3390/jcm13092487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/17/2024] [Accepted: 04/20/2024] [Indexed: 05/13/2024] Open
Abstract
This review aims to explore advancements in perioperative ischemic stroke risk estimation for asymptomatic patients with significant carotid artery stenosis, focusing on Circle of Willis (CoW) morphology based on the CTA or MR diagnostic imaging in the current preoperative diagnostic algorithm. Functional transcranial Doppler (fTCD), near-infrared spectroscopy (NIRS), and optical coherence tomography angiography (OCTA) are discussed in the context of evaluating cerebrovascular reserve capacity and collateral vascular systems, particularly the CoW. These non-invasive diagnostic tools provide additional valuable insights into the cerebral perfusion status. They support biomedical modeling as the gold standard for the prediction of the potential impact of carotid artery stenosis on the hemodynamic changes of cerebral perfusion. Intraoperative risk assessment strategies, including selective shunting, are explored with a focus on CoW variations and their implications for perioperative ischemic stroke and cognitive function decline. By synthesizing these insights, this review underscores the potential of non-invasive diagnostic methods to support clinical decision making and improve asymptomatic patient outcomes by reducing the risk of perioperative ischemic neurological events and preventing further cognitive decline.
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Affiliation(s)
- Balázs Lengyel
- Department of Vascular and Endovascular Surgery, Heart and Vascular Center, Semmelweis University, 1122 Budapest, Hungary; (B.L.); (P.S.J.)
| | - Rita Magyar-Stang
- Department of Neurology, Semmelweis University, 1085 Budapest, Hungary; (R.M.-S.); (H.P.); (R.D.)
- Szentágothai Doctoral School of Neurosciences, Semmelweis University, 1085 Budapest, Hungary
| | - Hanga Pál
- Department of Neurology, Semmelweis University, 1085 Budapest, Hungary; (R.M.-S.); (H.P.); (R.D.)
- Szentágothai Doctoral School of Neurosciences, Semmelweis University, 1085 Budapest, Hungary
| | - Róbert Debreczeni
- Department of Neurology, Semmelweis University, 1085 Budapest, Hungary; (R.M.-S.); (H.P.); (R.D.)
- Szentágothai Doctoral School of Neurosciences, Semmelweis University, 1085 Budapest, Hungary
| | - Ágnes Dóra Sándor
- Department of Anesthesiology and Intensive Therapy, Semmelweis University, 1085 Budapest, Hungary; (Á.D.S.); (A.S.)
| | - Andrea Székely
- Department of Anesthesiology and Intensive Therapy, Semmelweis University, 1085 Budapest, Hungary; (Á.D.S.); (A.S.)
| | - Dániel Gyürki
- Department of Hydrodynamic Systems, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, 1085 Budapest, Hungary; (D.G.); (B.C.)
| | - Benjamin Csippa
- Department of Hydrodynamic Systems, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, 1085 Budapest, Hungary; (D.G.); (B.C.)
| | - Lilla István
- Department of Ophthalmology, Semmelweis University, 1085 Budapest, Hungary; (L.I.); (I.K.)
| | - Illés Kovács
- Department of Ophthalmology, Semmelweis University, 1085 Budapest, Hungary; (L.I.); (I.K.)
- Department of Ophthalmology, Weill Cornell Medical College, New York, NY 10065, USA
- Department of Clinical Ophthalmology, Faculty of Health Sciences, Semmelweis University, 1085 Budapest, Hungary
| | - Péter Sótonyi
- Department of Vascular and Endovascular Surgery, Heart and Vascular Center, Semmelweis University, 1122 Budapest, Hungary; (B.L.); (P.S.J.)
| | - Zsuzsanna Mihály
- Department of Vascular and Endovascular Surgery, Heart and Vascular Center, Semmelweis University, 1122 Budapest, Hungary; (B.L.); (P.S.J.)
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Avery EW, Abou-Karam A, Abi-Fadel S, Behland J, Mak A, Haider SP, Zeevi T, Sanelli PC, Filippi CG, Malhotra A, Matouk CC, Falcone GJ, Petersen N, Sansing LH, Sheth KN, Payabvash S. Radiomics-Based Prediction of Collateral Status from CT Angiography of Patients Following a Large Vessel Occlusion Stroke. Diagnostics (Basel) 2024; 14:485. [PMID: 38472957 PMCID: PMC10930945 DOI: 10.3390/diagnostics14050485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/01/2024] [Accepted: 02/15/2024] [Indexed: 03/14/2024] Open
Abstract
BACKGROUND A major driver of individual variation in long-term outcomes following a large vessel occlusion (LVO) stroke is the degree of collateral arterial circulation. We aimed to develop and evaluate machine-learning models that quantify LVO collateral status using admission computed tomography angiography (CTA) radiomics. METHODS We extracted 1116 radiomic features from the anterior circulation territories from admission CTAs of 600 patients experiencing an acute LVO stroke. We trained and validated multiple machine-learning models for the prediction of collateral status based on consensus from two neuroradiologists as ground truth. Models were first trained to predict (1) good vs. intermediate or poor, or (2) good vs. intermediate or poor collateral status. Then, model predictions were combined to determine a three-tier collateral score (good, intermediate, or poor). We used the receiver operating characteristics area under the curve (AUC) to evaluate prediction accuracy. RESULTS We included 499 patients in training and 101 in an independent test cohort. The best-performing models achieved an averaged cross-validation AUC of 0.80 ± 0.05 for poor vs. intermediate/good collateral and 0.69 ± 0.05 for good vs. intermediate/poor, and AUC = 0.77 (0.67-0.87) and AUC = 0.78 (0.70-0.90) in the independent test cohort, respectively. The collateral scores predicted by the radiomics model were correlated with (rho = 0.45, p = 0.002) and were independent predictors of 3-month clinical outcome (p = 0.018) in the independent test cohort. CONCLUSIONS Automated tools for the assessment of collateral status from admission CTA-such as the radiomics models described here-can generate clinically relevant and reproducible collateral scores to facilitate a timely treatment triage in patients experiencing an acute LVO stroke.
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Affiliation(s)
- Emily W. Avery
- Section of Neuroradiology, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT 06520, USA; (E.W.A.); (A.M.)
| | - Anthony Abou-Karam
- Section of Neuroradiology, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT 06520, USA; (E.W.A.); (A.M.)
| | - Sandra Abi-Fadel
- Section of Neuroradiology, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT 06520, USA; (E.W.A.); (A.M.)
| | - Jonas Behland
- Section of Neuroradiology, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT 06520, USA; (E.W.A.); (A.M.)
- CLAIM—Charité Lab for Artificial Intelligence in Medicine, Charité—Universitätsmedizin Berlin, 10117 Berlin, Germany
| | - Adrian Mak
- Section of Neuroradiology, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT 06520, USA; (E.W.A.); (A.M.)
- CLAIM—Charité Lab for Artificial Intelligence in Medicine, Charité—Universitätsmedizin Berlin, 10117 Berlin, Germany
| | - Stefan P. Haider
- Section of Neuroradiology, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT 06520, USA; (E.W.A.); (A.M.)
- Department of Otorhinolaryngology, University Hospital of Ludwig Maximilians Universität München, 81377 Munich, Germany
| | - Tal Zeevi
- Section of Neuroradiology, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT 06520, USA; (E.W.A.); (A.M.)
| | - Pina C. Sanelli
- Section of Neuroradiology, Department of Radiology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell Health, Manhasset, NY 11030, USA
| | - Christopher G. Filippi
- Section of Neuroradiology, Department of Radiology, Tufts School of Medicine, Boston, MA 02111, USA
| | - Ajay Malhotra
- Section of Neuroradiology, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT 06520, USA; (E.W.A.); (A.M.)
| | - Charles C. Matouk
- Division of Neurovascular Surgery, Department of Neurosurgery, Yale School of Medicine, New Haven, CT 06520, USA
| | - Guido J. Falcone
- Division of Neurocritical Care and Emergency Neurology, Department of Neurology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Nils Petersen
- Division of Neurocritical Care and Emergency Neurology, Department of Neurology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Lauren H. Sansing
- Division of Stroke and Vascular Neurology, Department of Neurology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Kevin N. Sheth
- Division of Neurocritical Care and Emergency Neurology, Department of Neurology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Seyedmehdi Payabvash
- Section of Neuroradiology, Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT 06520, USA; (E.W.A.); (A.M.)
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Molad J, Hallevi H, Seyman E, Ben-Assayag E, Jonas-Kimchi T, Sadeh U, Rotschild O, Simaan N, Horev A, Cohen J, Leker RR, Honig A. The pivotal role of timing of intravenous thrombolysis bridging treatment prior to endovascular thrombectomy. Ther Adv Neurol Disord 2023; 16:17562864231216637. [PMID: 38107442 PMCID: PMC10725133 DOI: 10.1177/17562864231216637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 11/09/2023] [Indexed: 12/19/2023] Open
Abstract
Background The role of intravenous thrombolysis (IVT) as bridging treatment prior to endovascular thrombectomy (EVT) is under debate and better patient selection is needed. Objectives As the efficacy and safety of IVT diminish with time, we aimed to examine the impact of bridging treatment within different time frames from symptom onset. Design A retrospective registry study. Methods Data were extracted from ongoing prospective EVT registries in two large tertiary centers. The current study included IVT-eligible patients with onset to door (OTD) < 4 h. We examined the efficacy and safety of bridging treatment through a comparison of the IVT + EVT group with the direct-EVT group by different time frames. Results In all, 408 patients (age 71.1 ± 14.6, 50.6% males) were included, among them 195 received IVT + EVT and 213 underwent direct EVT. Both groups had similar characteristics. In the IVT + EVT group only, longer OTD was associated with lower rates of favorable outcome (p = 0.021) and higher rates of hemorrhagic transformation (HT; p = 0.001). In patients with OTD ⩽ 2 h, IVT + EVT compared to direct EVT had higher rates of TICI 2b-3 (86.2% versus 80.7%, p = 0.038). In patients with OTD > 2 h, IVT + EVT had lower rates of favorable outcome (33.3% versus 56.9%, p = 0.021), worse discharge National Institutes of Health Stroke Scale [7 (2-13) versus 3 (1-8), p = 0.024], and higher rates of HT (34.0% versus 8.5%, p < 0.001). Discussion In this study, we found OTD times to have a significant effect on the impact of IVT bridging treatment. Our study shows that among patients with OTD < 2 h bridging treatment may be associated with higher rates of successful recanalization. By contrast, in patients with OTD > 2 h, bridging treatment was associated with worse outcomes. Further time-sensitive randomized trials are needed.
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Affiliation(s)
- Jeremy Molad
- Department of Stroke and Neurology, Tel-Aviv Sourasky Medical Center, 6 Weizmann Street, Tel-Aviv 64239, Israel
| | - Hen Hallevi
- Department of Stroke and Neurology, Tel-Aviv Sourasky Medical Center, Tel-Aviv, Israel
- Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Estelle Seyman
- Department of Stroke and Neurology, Tel-Aviv Sourasky Medical Center, Tel-Aviv, Israel
| | - Einor Ben-Assayag
- Department of Stroke and Neurology, Tel-Aviv Sourasky Medical Center, Tel-Aviv, Israel
- Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Tali Jonas-Kimchi
- Department of Radiology, Tel-Aviv Sourasky Medical Center, Tel-Aviv, Israel
| | - Udi Sadeh
- Department of Radiology, Tel-Aviv Sourasky Medical Center, Tel-Aviv, Israel
| | - Ofer Rotschild
- Department of Stroke and Neurology, Tel-Aviv Sourasky Medical Center, Tel-Aviv, Israel
| | - Naaem Simaan
- Department of Neurology, Ziv Medical Center, Safed, Israel
| | - Anat Horev
- Department of Neurology, Soroka Medical Center, Beer-Sheva, Israel
| | - Jose Cohen
- Department of Neurosurgery, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Ronen R. Leker
- Department of Neurology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Asaf Honig
- Department of Neurology, Soroka Medical Center, Beer-Sheva, Israel
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Zhang B, Wang G, Gao Y, Tan H, Wang P. Influence of the integrity of circle of Willis on asymptomatic or mild patients with first diagnosed chronic internal carotid artery occlusion. Eur J Radiol 2023; 165:110954. [PMID: 37406584 DOI: 10.1016/j.ejrad.2023.110954] [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: 04/20/2023] [Revised: 06/08/2023] [Accepted: 06/29/2023] [Indexed: 07/07/2023]
Abstract
BACKGROUND In order to identify individuals with chronic internal carotid artery occlusion (CICAO), it is essential to understand the integrity of the circle of Willis (CoW). This understanding is important as it may determine the potential benefits of active medical and endovascular treatments. PURPOSE The objective of this study is to assess whether diminished integrity of the CoW can serve as a useful marker for identifying individuals with more severe impairment in cerebral blood perfusion and a higher incidence of cerebral infarction among asymptomatic or mildly affected patients with CICAO. MATERIALS AND METHODS We conducted a retrospective review of asymptomatic or mildly affected patients with newly diagnosed CICAO who did not receive reperfusion therapies. The categorization of patients into good or poor integrity groups was based on the assessment of CoW integrity using CTA. We evaluated the volume and value of prolonged time to peak (TTP) in both groups, as well as the occurrence of new cerebral infarctions. Our analysis involved multivariate regression and receiver operating characteristic (ROC) analysis. RESULTS Hemodynamic abnormalities characterized by prolonged TTP were observed in the affected side's blood supply region in all 38 patients. There was a notable difference in the volume and value of prolonged TTP between the two groups (P < 0.001). Correlation analyses based on CTP and CTA parameters revealed a negative relationship between CoW scores and both the abnormal volume (r = -0.624, P = 0.000) and value (r = -0.589, P = 0.000) of prolonged TTP. Upon multivariable adjustment, the independent predictors for new cerebral infarction and higher volume of prolonged TTP were solely the CoW status, with respective estimates of (b = 6.05; 95% confidence interval [CI]: 1.619, 22.619; P = 0.007) and (b = 35.486; 95% CI: 4.697, 268.088; P = 0.001). CONCLUSION Assessing the integrity of the CoW is crucial in evaluating abnormal perfusion in asymptomatic or mildly affected individuals who are newly diagnosed with CICAO and have not undergone reperfusion therapy.
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Affiliation(s)
- Bo Zhang
- Department of Medical Imaging, Tongji Hospital, Tongji University School of Medicine, Shanghai, China No. 389, Xincun Road, Shanghai 200065, China
| | - Guanliansheng Wang
- Department of Medical Imaging, Shanghai TCM-integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China No. 230, Baoding Road, Shanghai 200082, China
| | - Yan Gao
- Department of Medical Imaging, Tongji Hospital, Tongji University School of Medicine, Shanghai, China No. 389, Xincun Road, Shanghai 200065, China
| | - Huaqiao Tan
- Department of Intervention Department, Tongji Hospital, Tongji University School of Medicine, Shanghai, China No. 389, Xincun Road, Shanghai 200065, China
| | - Peijun Wang
- Department of Medical Imaging, Tongji Hospital, Tongji University School of Medicine, Shanghai, China No. 389, Xincun Road, Shanghai 200065, China.
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Sperti M, Arba F, Acerbi A, Busto G, Fainardi E, Sarti C. Determinants of cerebral collateral circulation in acute ischemic stroke due to large vessel occlusion. Front Neurol 2023; 14:1181001. [PMID: 37265461 PMCID: PMC10230086 DOI: 10.3389/fneur.2023.1181001] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 04/11/2023] [Indexed: 06/03/2023] Open
Abstract
Introduction Cerebral collateral circulation has a central role in ischemic stroke pathophysiology, and it is considered to correlate with infarct size, the success of reperfusion therapies, and clinical outcomes. Our aim was to study the factors influencing the development of collaterals in patients with acute ischemic stroke eligible for endovascular treatment. Materials and methods We enrolled patients with acute ischemic stroke and large vessel occlusion of anterior circulation potentially eligible for endovascular treatment. Included patients performed multiphase CT angiography to assess collaterals that were graded by the Menon Grading Score. We investigated the associations between clinical factors and collaterals and tested independent associations with logistic (good vs. poor collaterals) and ordinal (collateral grade grouped, Menon 0-2, 3, 4-5) regression analysis adjusting for age, sex, stroke severity, and onset to CT time (OCTT). Results We included 520 patients, the mean age was 75 (±13.6) years, 215 (41%) were men, and the median (IQR) NIHSS was 17 (11-22). Good collaterals were present in 323 (62%) patients and were associated with lower NIHSS (median 16 vs. 18; p < 0.001) and left hemisphere involvement (60% vs. 45%; p < 0.001), whereas previous stroke/TIA was more frequent in patients with poor collaterals (17 vs. 26%; p = 0.014). These results were confirmed in both logistic and ordinal regression analyses where good collaterals were associated with lower NIHSS (OR = 0.94; 95% CI = 0.91-0.96; cOR = 0.95; 95% CI = 0.92-0.97, respectively) and left hemisphere stroke (OR = 2.24; 95% CI = 1.52-3.28; cOR = 2.11; 95% CI = 1.46-3.05, respectively), while previous stroke/TIA was associated with poor collaterals (OR = 0.57; 95% CI = 0.36-0.90; cOR = 0.61; 95% CI = 0.40-0.94, respectively). Vascular risk factors, demographics, and pre-stroke treatments did not influence the collateral score. Discussion The results of our study suggest that risk factors and demographics do not influence the development of collateral circles, except for a negative relation with previous ischemic events. We confirm an already reported observation of a possible protective effect of collaterals on tissue damage assuming NIHSS as its surrogate. The association between left hemispheric stroke and better collaterals deserves to be further explored. Further efforts are needed to identify the factors that favor the development of collaterals.
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Affiliation(s)
- Martina Sperti
- Department of Neurofarba, University of Florence, Florence, Italy
| | - Francesco Arba
- Stroke Unit, Careggi University Hospital, Florence, Italy
| | - Amedeo Acerbi
- Department of Neurofarba, University of Florence, Florence, Italy
| | - Giorgio Busto
- Neuroradiology, Careggi University Hospital, Florence, Italy
| | - Enrico Fainardi
- Neuroradiology, Careggi University Hospital, Florence, Italy
| | - Cristina Sarti
- Department of Neurofarba, University of Florence, Florence, Italy
- Stroke Unit, Careggi University Hospital, Florence, Italy
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Chang Y, Eom S, Kim M, Song TJ. Medical Management of Dyslipidemia for Secondary Stroke Prevention: Narrative Review. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:776. [PMID: 37109734 PMCID: PMC10141044 DOI: 10.3390/medicina59040776] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/13/2023] [Accepted: 04/14/2023] [Indexed: 04/29/2023]
Abstract
Dyslipidemia is a major risk factor for stroke, following hypertension, diabetes, and smoking, and is an important risk factor for the prevention and treatment of coronary artery disease and peripheral vascular disease, including stroke. Recent guidelines recommend considering low-density lipoprotein cholesterol (LDL-C)-lowering therapies, such as statins (preferably), ezetimibe, or proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitors to prevent the occurrence or recurrence of stroke, adhering to the "lower is better" approach. In this review, we examined the evidence supporting lipid-lowering medications like statins, ezetimibe, and PCSK9 inhibitors for secondary stroke prevention and dyslipidemia management in different stroke subtypes. Stroke guidelines advocate for administering the maximum tolerable dose of statins as the primary treatment and as soon as possible despite the potential for new-onset diabetes mellitus and possible muscle and liver toxicity due to their demonstrated benefits in secondary prevention of cardiovascular diseases and mortality reduction. When statin use is insufficient for LDL lowering, ezetimibe and PCSK9 inhibitors are recommended as complementary therapies. It is essential to establish lipid-lowering therapy goals based on the stroke subtype and the presence of comorbidities.
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Affiliation(s)
- Yoonkyung Chang
- Department of Neurology, Mokdong Hospital, College of Medicine, Ewha Womans University, Seoul 07985, Republic of Korea
| | - Soojeong Eom
- Department of Medicine, College of Medicine, Ewha Womans University, Seoul 07804, Republic of Korea
| | - Minjeong Kim
- Department of Medicine, College of Medicine, Ewha Womans University, Seoul 07804, Republic of Korea
| | - Tae-Jin Song
- Department of Neurology, Seoul Hospital, College of Medicine, Ewha Womans University, Seoul 07804, Republic of Korea
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Tao C, Wang Y, Xiao S. Clinical significance of CT angiographic assessment of collateral circulation combined with serum NLRP1 levels in ischemic stroke patients. Medicine (Baltimore) 2023; 102:e33433. [PMID: 37000063 PMCID: PMC10063313 DOI: 10.1097/md.0000000000033433] [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: 11/01/2022] [Revised: 03/11/2023] [Accepted: 03/13/2023] [Indexed: 04/01/2023] Open
Abstract
This research aimed to combine serum NLR-pyrin domain containing 1 (NLRP1) levels and collateral circulation to assess ischemic stroke patients and predict the prognoses of the patients. This present prospective observational study enrolled 196 ischemic stroke patients. All patients underwent CTA as well as digital subtraction angiography (DSA) to assess collateral circulation by American Society of Interventional and Therapeutic Neuroradiology/Society of Interventional Radiology (ASITN/SIR). In addition, we collected serum samples from 100 patients with carotid atherosclerosis as controls. The serum NLRP1, tumor necrosis factor α (TNF-α), interleukin (IL)-6, IL-1β and C-reactive protein (CRP) levels were measured by enzyme-linked immunosorbent assay (ELISA). The age, BMI, sex, smoke condition, diastolic blood pressure, systolic blood pressure, National Institutes of Health Stroke Scores (NIHSS), modified Rankin Scale (mRS) scores, imaging indicators and the levels of triglyceride, total cholesterol (TC), low-density leptin cholesterol (LDLC), high-density leptin cholesterol of all subjects were recorded. All data used SPSS 18.0 to statistical analyses. The serum levels of NLRP1 were remarkably enhanced in the ischemic stroke patients compared with the carotid atherosclerosis patients. The NIHSS score, the mRS score after 90 days and the levels of NLRP1, CRP, TNF-α IL-6 and IL-1β of ischemic stroke patients in the ASITN/SIR grade 0 to 2 group were remarkably elevated than the ischemic stroke patients in ASITN/SIR grade 3 to 4 group. Spearman analysis supported that a positive correlation existed among the NLRP1, CRP, IL-6, TNF-α, and IL-1β levels. The NIHSS score, infarct volume and the levels of NLRP1, IL-6, TNF-α, and IL-1β of ischemic stroke patients in the mRS score ≥ 3 group were remarkably elevated than the ischemic stroke patients in the mRS score ≤ 2 group. ASITN/SIR grade and NLRP1 could be potential diagnostic biomarkers of poor prognosis of ischemic stroke patients. It was found that NLRP1, ASITN/SIR grade, infarct volume, NIHSS, IL-6, and IL-1β were the risk factors for bad prognosis of ischemic stroke patients. This study showed that the serum NLRP1 levels were remarkably decreased in ischemic stroke patients. In addition, the serum NLRP1 levels and ASITN/SIR grade could predict the prognosis of ischemic stroke patients.
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Affiliation(s)
- Chong Tao
- Department of Radiology, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, Hubei, P. R. China
| | - Yu Wang
- Department of Radiology, Wuhan Hospital of Traditional Chinese Medicine, Wuhan, Hubei, P. R. China
| | - Shiyin Xiao
- Department of Radiology, Wuhan Hospital of Traditional Chinese Medicine, Wuhan, Hubei, P. R. China
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Cipolla MJ. Therapeutic Induction of Collateral Flow. Transl Stroke Res 2023; 14:53-65. [PMID: 35416577 PMCID: PMC10155807 DOI: 10.1007/s12975-022-01019-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 01/31/2023]
Abstract
Therapeutic induction of collateral flow as a means to salvage tissue and improve outcome from acute ischemic stroke is a promising approach in the era in which endovascular therapy is no longer time-dependent but collateral-dependent. The importance of collateral flow enhancement as a therapeutic for acute ischemic stroke extends beyond those patients with large amounts of salvageable tissue. It also has the potential to extend the time window for reperfusion therapies in patients who are ineligible for endovascular thrombectomy. In addition, collateral enhancement may be an important adjuvant to neuroprotective agents by providing a more robust vascular route for which treatments can gain access to at risk tissue. However, our understanding of collateral hemodynamics, including under comorbid conditions that are highly prevalent in the stroke population, has hindered the efficacy of collateral flow augmentation for improving stroke outcome in the clinical setting. This review will discuss our current understanding of pial collateral function and hemodynamics, including vasoactivity that is critical for enhancing penumbral perfusion. In addition, mechanisms by which collateral flow can be increased during acute ischemic stroke to limit ischemic injury, that may be different depending on the state of the brain and vasculature prior to stroke, will also be reviewed.
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Affiliation(s)
- Marilyn J Cipolla
- Department of Neurological Sciences, University of Vermont Robert Larner College of Medicine, 149 Beaumont Ave, HSRF 416A, Burlington, VT, USA.
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Vermont Larner College of Medicine, Burlington, VT, USA.
- Department of Pharmacology, University of Vermont Larner College of Medicine, Burlington, VT, USA.
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Uniken Venema SM, Dankbaar JW, van der Lugt A, Dippel DWJ, van der Worp HB. Cerebral Collateral Circulation in the Era of Reperfusion Therapies for Acute Ischemic Stroke. Stroke 2022; 53:3222-3234. [PMID: 35938420 DOI: 10.1161/strokeaha.121.037869] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Clinical outcomes of patients with acute ischemic stroke depend in part on the extent of their collateral circulation. A good collateral circulation has also been associated with greater benefit of intravenous thrombolysis and endovascular treatment. Treatment decisions for these reperfusion therapies are increasingly guided by a combination of clinical and imaging parameters, particularly in later time windows. Computed tomography and magnetic resonance imaging enable a rapid assessment of both the collateral extent and cerebral perfusion. Yet, the role of the collateral circulation in clinical decision-making is currently limited and may be underappreciated due to the use of rather coarse and rater-dependent grading methods. In this review, we discuss determinants of the collateral circulation in patients with acute ischemic stroke, report on commonly used and emerging neuroimaging techniques for assessing the collateral circulation, and discuss the therapeutic and prognostic implications of the collateral circulation in relation to reperfusion therapies for acute ischemic stroke.
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Affiliation(s)
- Simone M Uniken Venema
- Department of Neurology and Neurosurgery, Brain Center, University Medical Center Utrecht, the Netherlands. (S.M.U.V., H.B.v.d.W.)
| | - Jan Willem Dankbaar
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, the Netherlands. (J.W.D.)
| | - Aad van der Lugt
- Department of Radiology and Nuclear Medicine, Erasmus Medical Center Rotterdam, the Netherlands. (A.v.d.L.)
| | - Diederik W J Dippel
- Department of Neurology, Erasmus Medical Center Rotterdam, the Netherlands. (D.W.J.D.)
| | - H Bart van der Worp
- Department of Neurology and Neurosurgery, Brain Center, University Medical Center Utrecht, the Netherlands. (S.M.U.V., H.B.v.d.W.)
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10
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Targeting organic cation transporters at the blood-brain barrier to treat ischemic stroke in rats. Exp Neurol 2022; 357:114181. [PMID: 35905840 DOI: 10.1016/j.expneurol.2022.114181] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 07/12/2022] [Accepted: 07/21/2022] [Indexed: 11/23/2022]
Abstract
Drug discovery and development for stroke is challenging as evidenced by few drugs that have advanced beyond a Phase III clinical trial. Memantine is a N-methyl-d-aspartate (NMDA) receptor antagonist that has been shown to be neuroprotective in various preclinical studies. We have identified an endogenous BBB uptake transport system for memantine: organic cation transporters 1 and 2 (Oct1/Oct2). Our goal was to evaluate Oct1/Oct2 as a required BBB mechanism for memantine neuroprotective effects. Male Sprague-Dawley rats (200-250 g) were subjected to middle cerebral artery occlusion (MCAO) for 90 min followed by reperfusion. Memantine (5 mg/kg, i.v.) was administered 2 h following intraluminal suture removal. Specificity of Oct-mediated transport was evaluated using cimetidine (15 mg/kg, i.v.), a competitive Oct1/Oct2 inhibitor. At 2 h post-MCAO, [3H]memantine uptake was increased in ischemic brain tissue. Cimetidine inhibited blood-to-brain uptake of [3H]memantine, which confirmed involvement of an Oct-mediated transport mechanism. Memantine reduced post-MCAO infarction and brain edema progression as well as improved neurological outcomes during post-stroke recovery. All positive effects of memantine were attenuated by co-administration of cimetidine, which demonstrates that Oct1/Oct2 transport is required for memantine to exert neuroprotective effects in ischemic stroke. Furthermore, Oct1/Oct2-mediated transport was shown to be the dominant mechanism for memantine brain uptake in the MCAO model despite a concurrent increase in paracellular "leak." These novel and translational findings provide mechanistic evidence for the critical role of BBB transporters in CNS delivery of stroke therapeutics, information that can help such drugs advance in clinical trials.
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11
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Hung SH, Kramer S, Werden E, Campbell BCV, Brodtmann A. Pre-stroke Physical Activity and Cerebral Collateral Circulation in Ischemic Stroke: A Potential Therapeutic Relationship? Front Neurol 2022; 13:804187. [PMID: 35242097 PMCID: PMC8886237 DOI: 10.3389/fneur.2022.804187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 01/12/2022] [Indexed: 11/13/2022] Open
Abstract
Favorable cerebral collateral circulation contributes to hindering penumbral tissue from progressing to infarction and is associated with positive clinical outcomes after stroke. Given its clinical importance, improving cerebral collateral circulation is considered a therapeutic target to reduce burden after stroke. We provide a hypothesis-generating discussion on the potential association between pre-stroke physical activity and cerebral collateral circulation in ischemic stroke. The recruitment of cerebral collaterals in acute ischemic stroke may depend on anatomical variations, capacity of collateral vessels to vasodilate, and individual risk factors. Physical activity is associated with improved cerebral endothelial and vascular function related to vasodilation and angiogenic adaptations, and risk reduction in individual risk factors. More research is needed to understand association between cerebral collateral circulation and physical activity. A presentation of different methodological considerations for measuring cerebral collateral circulation and pre-stroke physical activity in the context of acute ischemic stroke is included. Opportunities for future research into cerebral collateral circulation, physical activity, and stroke recovery is presented.
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Affiliation(s)
- Stanley Hughwa Hung
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Melbourne, VIC, Australia
| | - Sharon Kramer
- Centre for Quality and Patient Safety Research, Alfred Health Partnership, Melbourne, VIC, Australia.,Faculty of Health, School of Nursing and Midwifery, Deakin University, Geelong, VIC, Australia
| | - Emilio Werden
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Melbourne, VIC, Australia.,Melbourne Dementia Research Centre, The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
| | - Bruce C V Campbell
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Melbourne, VIC, Australia.,Department of Medicine and Neurology, Melbourne Brain Centre at the Royal Melbourne Hospital, University of Melbourne, Parkville, VIC, Australia
| | - Amy Brodtmann
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Melbourne, VIC, Australia.,Melbourne Dementia Research Centre, The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
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12
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Nannoni S, Ricciardi F, Strambo D, Sirimarco G, Wintermark M, Dunet V, Michel P. Correlation between ASPECTS and Core Volume on CT Perfusion: Impact of Time since Stroke Onset and Presence of Large-Vessel Occlusion. AJNR Am J Neuroradiol 2021; 42:422-428. [PMID: 33509915 DOI: 10.3174/ajnr.a6959] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 10/15/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Both ASPECTS and core volume on CTP are used to estimate infarct volume in acute ischemic stroke. To evaluate the potential role of ASPECTS for acute endovascular treatment decisions, we studied the correlation between ASPECTS and CTP core, depending on the timing and the presence of large-vessel occlusion. MATERIALS AND METHODS We retrospectively reviewed all MCA acute ischemic strokes with standardized reconstructions of CTP maps entered in the Acute STroke Registry and Analysis of Lausanne (ASTRAL) registry. Correlation between ASPECTS and CTP core was determined for early (<6 hours) versus late (6-24 hours) times from stroke onset and in the presence versus absence of large-vessel occlusion. We used correlation coefficients and adjusted multiple linear regression models. RESULTS We included 1046 patients with a median age of 71.4 years (interquartile range, IQR = 59.8-79.4 years), an NIHSS score of 12 (IQR, 6-18), an ASPECTS of 9 (IQR, 7-10), and a CTP core of 13.6 mL (IQR, 0.6-52.8 mL). The overall correlation between ASPECTS and CTP core was moderate (ρ = -0.49, P < .01) but significantly stronger in the late-versus-early window (ρ = -0.56 and ρ = -0.48, respectively; P = .05) and in the presence versus absence of large-vessel occlusion (ρ = -0.40 and ρ = -0.20, respectively; P < .01). In the regression model, the independent association between ASPECTS and CTP core was confirmed and was twice as strong in late-arriving patients with large-vessel occlusion (β = -0.21 per 10 mL; 95% CI, -0.27 to -0.15; P < .01) than in the overall population (β = -0.10; 95% CI, -0.14 to -0.07; P < .01). CONCLUSIONS In a large cohort of patients with acute ischemic stroke, we found a moderate correlation between ASPECTS and CTP core. However, this was stronger in patients with large-vessel occlusion and longer delay from stroke onset. Our results could support the use of ASPECTS as a surrogate marker of CTP core in late-arriving patients with acute ischemic stroke with large-vessel occlusion.
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Affiliation(s)
- S Nannoni
- From the Stroke Center (S.N., D.S., G.S., P.M.), Neurology Service
| | - F Ricciardi
- Department of Statistical Science (F.R.), University College London, London, UK
| | - D Strambo
- From the Stroke Center (S.N., D.S., G.S., P.M.), Neurology Service
| | - G Sirimarco
- From the Stroke Center (S.N., D.S., G.S., P.M.), Neurology Service
| | - M Wintermark
- Department of Radiology (M.W.), Neuroradiology Division, Stanford University and Medical Center, Stanford, California
| | - V Dunet
- Department of Diagnostic and Interventional Radiology (V.D.), Lausanne University Hospital, Lausanne, Switzerland
| | - P Michel
- From the Stroke Center (S.N., D.S., G.S., P.M.), Neurology Service
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13
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Wei B, Wang Z, Wu S, Orgah J, Zhu J, Song W. Improving Collateral Circulation: A Potential Adjunctive Strategy to Prevent or Slow the Progression of Vascular Dementia. Neuropsychiatr Dis Treat 2021; 17:3061-3067. [PMID: 34675517 PMCID: PMC8502063 DOI: 10.2147/ndt.s328446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 09/15/2021] [Indexed: 11/23/2022] Open
Abstract
Vascular dementia (VaD), a cognitive disorder caused by cerebrovascular pathologies, is the most common cause of dementia in the elderly, being second only to Alzheimer's disease. Researches have shown that adequate cerebral blood flow (CBF) is the first condition for maintaining the structural integrity and normal function of the brain, and VaD is generally considered to be resulted from neuronal loss due to reduced CBF. Collateral circulation, a compensation mechanism for CBF, provides an alternative vascular pathway for blood to reach ischemic tissues, which has been confirmed to be associated with better clinical outcomes of ischemic diseases. At present, considerable effort has been devoted to enhancing the functional prognosis of acute ischemic stroke by improving collateral circulation. Since ischemic stroke is the primary contributor to VaD, it is necessary to explore whether improving collateral circulation is beneficial to prevent or slow the progression of VaD. This article reviews the compensatory characteristics of different levels of cerebral collateral circulation, addresses the relationship between collateral circulation and VaD, and highlights that improving collateral circulation may be a potential adjunctive strategy in preventing and slowing the progression of VaD.
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Affiliation(s)
- Baoyu Wei
- State Key Laboratory of Component-Based Chinese Medicine, Institute of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Zhaoqi Wang
- State Key Laboratory of Component-Based Chinese Medicine, Institute of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Shihao Wu
- State Key Laboratory of Component-Based Chinese Medicine, Institute of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - John Orgah
- State Key Laboratory of Component-Based Chinese Medicine, Institute of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Jinqiang Zhu
- State Key Laboratory of Component-Based Chinese Medicine, Institute of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Wanshan Song
- Department of Acupuncture and Cerebropathy, Second Affiliated Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, 300250, People's Republic of China
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14
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Liu J, Wang Q, Ye C, Li G, Zhang B, Ji Z, Ji X. Premorbid Use of Statin and Outcome of Acute Ischemic Stroke After Intravenous Thrombolysis: A Meta-Analysis. Front Neurol 2020; 11:585592. [PMID: 33281723 PMCID: PMC7688895 DOI: 10.3389/fneur.2020.585592] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 10/16/2020] [Indexed: 01/01/2023] Open
Abstract
Background: The association between the premorbid use of statin and the early outcomes of acute ischemic stroke (AIS) after intravenous thrombolysis (IVT) remains uncertain. We performed a meta-analysis of observational studies to evaluate the influence of the premorbid use of statin on functional outcome and symptomatic intracranial hemorrhage (SIH) in AIS after IVT. Methods: Relevant studies were identified by search of PubMed, Embase, and Cochrane's Library databases. Only studies with multivariate analyses were included. A random-effect model, incorporating inter-study heterogeneity, was used to pool the results. Results: Twenty observational studies with 20,752 AIS patients who were treated with IVT were included. The pooled results showed that the premorbid use of statin was not associated with improved 3-month favorable functional outcome [odds ratio (OR): 1.05, 95% confidence interval (CI): 0.87-1.26, p = 0.60, I 2 = 52%), 3-month functional independence (OR: 1.13, 95% CI: 0.96-1.33, p = 0.15, I 2 = 52%), or 3-month mortality (OR: 1.12, 95% CI: 0.94-1.34, p = 0.20, I 2 = 20%). Moreover, the premorbid use of statin was associated with an increased risk of SIH in AIS after IVT (OR: 1.48, 95% CI: 1.12-1.95, p = 0.006, I 2 = 60%). Subgroup analyses according to study design, adjustment of baseline low-density lipoprotein cholesterol, and definitions of SIH showed consistent results (p-values for subgroup difference all >0.05). Conclusions: The premorbid use of statin is not associated with improved functional outcomes or mortality but is associated with a higher risk of SIH in AIS patients after IVT.
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Affiliation(s)
- Jia Liu
- China-America Institute of Neuroscience, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Qinghai Wang
- Department of Cardiology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Chaoqun Ye
- Department of Rehabilitation Medicine, Airforce Medical Center, Air Force Medical University, Beijing, China
| | - Gaifen Li
- China-America Institute of Neuroscience, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Bowei Zhang
- China-America Institute of Neuroscience, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Zhili Ji
- China-America Institute of Neuroscience, Luhe Hospital, Capital Medical University, Beijing, China
| | - Xunming Ji
- China-America Institute of Neuroscience, Xuanwu Hospital, Capital Medical University, Beijing, China
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15
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Ronaldson PT, Brzica H, Abdullahi W, Reilly BG, Davis TP. Transport Properties of Statins by Organic Anion Transporting Polypeptide 1A2 and Regulation by Transforming Growth Factor- β Signaling in Human Endothelial Cells. J Pharmacol Exp Ther 2020; 376:148-160. [PMID: 33168642 DOI: 10.1124/jpet.120.000267] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 11/03/2020] [Indexed: 12/14/2022] Open
Abstract
Our in vivo rodent studies have shown that organic anion transporting polypeptide (Oatp) 1a4 is critical for blood-to-brain transport of statins, drugs that are effective neuroprotectants. Additionally, transforming growth factor-β (TGF-β) signaling via the activin receptor-like kinase 1 (ALK1) receptor regulates Oatp1a4 functional expression. The human ortholog of Oatp1a4 is OATP1A2. Therefore, the translational significance of our work requires demonstration that OATP1A2 can transport statins and is regulated by TGF-β/ALK1 signaling. Cellular uptake and monolayer permeability of atorvastatin, pravastatin, and rosuvastatin were investigated in vitro using human umbilical vein endothelial cells (HUVECs). Regulation of OATP1A2 by the TGF-β/ALK1 pathway was evaluated using bone morphogenetic protein 9 (BMP-9), a selective ALK1 agonist, and LDN193189, an ALK1 antagonist. We showed that statin accumulation in HUVECs requires OATP1A2-mediated uptake but is also affected by efflux transporters (i.e., P-glycoprotein, breast cancer resistance protein). Absorptive flux (i.e., apical-to-basolateral) for all statins was higher than secretory flux (i.e., basolateral-to-apical) and was decreased by an OATP inhibitor (i.e., estrone-3-sulfate). OATP1A2 protein expression, statin uptake, and cellular monolayer permeability were increased by BMP-9 treatment. This effect was attenuated in the presence of LDN193189. Apical-to-basolateral statin transport across human endothelial cellular monolayers requires functional expression of OATP1A2, which can be controlled by therapeutically targeting TGF-β/ALK1 signaling. Taken together with our previous work, the present data show that OATP-mediated drug transport is a critical mechanism in facilitating neuroprotective drug disposition across endothelial barriers of the blood-brain barrier. SIGNIFICANCE STATEMENT: Transporter data derived from rodent models requires validation in human models. Using human umbilical vein endothelial cells, this study has shown that statin transport is mediated by OATP1A2. Additionally, we demonstrated that OATP1A2 is regulated by transforming growth factor-β/activin receptor-like kinase 1 signaling. This work emphasizes the need to consider endothelial transporter kinetics and regulation during preclinical drug development. Furthermore, our forward-thinking approach can identify effective therapeutics for diseases for which drug development has been challenging (i.e., neurological diseases).
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Affiliation(s)
- Patrick T Ronaldson
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, Arizona
| | - Hrvoje Brzica
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, Arizona
| | - Wazir Abdullahi
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, Arizona
| | - Bianca G Reilly
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, Arizona
| | - Thomas P Davis
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, Arizona
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16
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Zhu J, Ma M, Fang J, Bao J, Dong S, Chen N, Guo Y, He L. Prestroke statin use enhances collateralization in acute ischemic stroke patients. Restor Neurol Neurosci 2020; 38:311-321. [PMID: 32925118 DOI: 10.3233/rnn-201012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Statin therapy has been shown to be effective in the prevention of ischemic stroke. In addition, recent studies have suggested that prior statin therapy could lower the initial stroke severity and improve stroke functional outcomes in the event of stroke. It was speculated that prestroke statin use may enhance collateral circulation and result in favorable functional outcomes. OBJECTIVE The aim of the study was to investigate the association of prestroke statin use with leptomeningeal collaterals and to determine the association of prestroke statin use with stroke severity and functional outcome in acute ischemic stroke patients. METHODS We prospectively and consecutively enrolled 239 acute ischemic stroke patients with acute infarction due to occlusion of the middle cerebral artery within 24 h in the neurology department of West China Hospital from May 2011 to April 2017. Computed tomographic angiography (CTA) imaging was performed for all patients to detect middle cerebral artery thrombus; regional leptomeningeal collateral score (rLMCS) was used to assess the degree of collateral circulation; the National Institutes of Health Stroke Scale (NIHSS) was used to measure stroke severity at admission; the modified Rankin scale (mRS) was used to measure outcome at 90 days; and premorbid medications were recorded. Univariate and multivariate analyses were performed. RESULTS Overall, 239 patients met the inclusion criteria. Fifty-four patients used statins, and 185 did not use statins before stroke onset. Prestroke statin use was independently associated with good collateral circulation (rLMCS > 10) (odds ratio [OR], 4.786; 95% confidence interval [CI], 1.195-19.171; P = 0.027). Prestroke statin use was not independently associated with lower stroke severity (NIHSS score≤14) (OR, 1.955; 95% CI, 0.657-5.816; p = 0.228), but prestroke statin use was independently associated with favorable outcome (mRS score≤2) (OR, 3.868; 95% CI, 1.325-11.289; P = 0.013). CONCLUSIONS Our findings suggest that prestroke statin use was associated with good leptomeningeal collaterals and clinical outcomes in acute ischemic stroke (AIS) patients presenting with occlusion of the middle cerebral artery. However, clinical studies should be conducted to verify this claim.
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Affiliation(s)
- Jiaying Zhu
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, CD, China.,Department of Emergency, Gui Zhou provincial People's Hospital, Guiyang, GY, China
| | - Mengmeng Ma
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, CD, China
| | - Jinghuan Fang
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, CD, China
| | - Jiajia Bao
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, CD, China
| | - Shuju Dong
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, CD, China
| | - Ning Chen
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, CD, China
| | - Yijia Guo
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, CD, China
| | - Li He
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, CD, China
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17
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Williams EI, Betterton RD, Davis TP, Ronaldson PT. Transporter-Mediated Delivery of Small Molecule Drugs to the Brain: A Critical Mechanism That Can Advance Therapeutic Development for Ischemic Stroke. Pharmaceutics 2020; 12:pharmaceutics12020154. [PMID: 32075088 PMCID: PMC7076465 DOI: 10.3390/pharmaceutics12020154] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 02/10/2020] [Accepted: 02/11/2020] [Indexed: 12/28/2022] Open
Abstract
Ischemic stroke is the 5th leading cause of death in the United States. Despite significant improvements in reperfusion therapies, stroke patients still suffer from debilitating neurocognitive deficits. This indicates an essential need to develop novel stroke treatment paradigms. Endogenous uptake transporters expressed at the blood-brain barrier (BBB) provide an excellent opportunity to advance stroke therapy via optimization of small molecule neuroprotective drug delivery to the brain. Examples of such uptake transporters include organic anion transporting polypeptides (OATPs in humans; Oatps in rodents) and organic cation transporters (OCTs in humans; Octs in rodents). Of particular note, small molecule drugs that have neuroprotective properties are known substrates for these transporters and include 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitors (i.e., statins) for OATPs/Oatps and 1-amino-3,5-dimethyladamantane (i.e., memantine) for OCTs/Octs. Here, we review current knowledge on specific BBB transporters that can be targeted for improvement of ischemic stroke treatment and provide state-of-the-art perspectives on the rationale for considering BBB transport properties during discovery/development of stroke therapeutics.
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18
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Malhotra K, Goyal N, Katsanos AH, Filippatou A, Mistry EA, Khatri P, Anadani M, Spiotta AM, Sandset EC, Sarraj A, Magoufis G, Krogias C, Tönges L, Safouris A, Elijovich L, Goyal M, Arthur A, Alexandrov AV, Tsivgoulis G. Association of Blood Pressure With Outcomes in Acute Stroke Thrombectomy. Hypertension 2020; 75:730-739. [PMID: 31928111 DOI: 10.1161/hypertensionaha.119.14230] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Limited data exist evaluating the effect of blood pressure (BP) on clinical outcomes among patients with acute ischemic stroke with large vessel occlusion treated with mechanical thrombectomy (MT). We sought to evaluate the association of BP levels on clinical outcomes among patients with acute ischemic stroke with large vessel occlusion treated with MT. Studies were identified that reported the association of systolic BP (SBP) or diastolic BP levels before, during, or after MT on the outcomes of patients with acute ischemic stroke treated with MT. Unadjusted and adjusted analyses of studies reporting odds ratios (ORadj) per 10 mm Hg BP increment were performed. Our analysis included 25 studies comprising 6474 patients. Higher pre-MT mean SBP (P=0.008) and post-MT maximum SBP (P=0.009) levels were observed in patients who died within 3 months. Patients with 3-month functional independence were noted to have lower pre-MT (P<0.001) and post-MT maximum SBP levels (P<0.001). In adjusted analyses, increasing post-MT maximum SBP and diastolic BP levels were associated with 3-month mortality (ORadj, 1.19 [95% CI,1.00-1.43]; I2=78%, P value for Cochran Q test: 0.001) and symptomatic intracranial hemorrhage (ORadj, 1.65 [95% CI, 1.11-2.44]; I2=0%, P value for Cochran Q test: 0.80), respectively. Increasing pre- and post-MT mean SBP levels were associated with lower odds of 3-month functional independence (ORadj, 0.86 [95% CI, 0.77-0.96]; I2=18%, P value for Cochran Q test: 0.30) and (ORadj, 0.80 [95% CI, 0.72-0.89]; I2=0%, P value for Cochran Q test: 0.51), respectively. In conclusion, elevated BP levels before and after MT are associated with adverse outcomes among patients with acute ischemic stroke with large vessel occlusion.
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Affiliation(s)
- Konark Malhotra
- From the Department of Neurology, Allegheny Health Network, Pittsburgh, PA (K.M.)
| | - Nitin Goyal
- Department of Neurology, University of Tennessee, Memphis (N.G., A.V.A., G.T.)
| | - Aristeidis H Katsanos
- Department of Neurology, McMaster University/Population Health Research Institute, Hamilton, Canada (A.H.K.)
| | - Angeliki Filippatou
- Second Department of Neurology, "Attikon" University Hospital, National and Kapodistrian University of Athens, Greece (A.F., G.T.)
| | - Eva A Mistry
- Department of Neurology, Vanderbilt University, Nashville, TN (E.A.M.)
| | - Pooja Khatri
- Department of Neurology, University of Cincinnati, OH (P.K.)
| | - Mohammad Anadani
- Department of Neurology, Washington University School of Medicine, St Louis, MO (M.A.).,Department of Neurosurgery, Medical University of South Carolina, Charleston (M.A., A.M.S.)
| | - Alejandro M Spiotta
- Department of Neurosurgery, Medical University of South Carolina, Charleston (M.A., A.M.S.)
| | - Else Charlotte Sandset
- Department of Neurology, Stroke Unit, Oslo University Hospital, Norway (E.C.S.).,The Norwegian Air Ambulance Foundation, Oslo, Norway (E.C.S.)
| | - Amrou Sarraj
- Department of Neurology, UT Houston, TX (A. Sarraj)
| | - Georgios Magoufis
- Stroke Unit, Metropolitan Hospital, Piraeus, Greece (G.M., A. Safouris)
| | - Christos Krogias
- Department of Neurology, St. Josef-Hospital, Ruhr-University Bochum, Germany (C.K., L.T.)
| | - Lars Tönges
- Department of Neurology, St. Josef-Hospital, Ruhr-University Bochum, Germany (C.K., L.T.)
| | | | - Lucas Elijovich
- Department of Neurosurgery, University of Tennessee/Semmes-Murphey Clinic, Memphis (L.E., A.A.)
| | - Mayank Goyal
- Departments of Radiology and Clinical Neurosciences, University of Calgary, AB, Canada (M.G.)
| | - Adam Arthur
- Department of Neurosurgery, University of Tennessee/Semmes-Murphey Clinic, Memphis (L.E., A.A.)
| | - Andrei V Alexandrov
- Department of Neurology, University of Tennessee, Memphis (N.G., A.V.A., G.T.)
| | - Georgios Tsivgoulis
- Department of Neurology, University of Tennessee, Memphis (N.G., A.V.A., G.T.).,Second Department of Neurology, "Attikon" University Hospital, National and Kapodistrian University of Athens, Greece (A.F., G.T.)
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19
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Gennesseaux J, Giordano Orsini G, Lefour S, Bakchine S, Marion Q, Barbe C, Gennai S. Early Management of Transient Ischemic Attack in Emergency Departments in France. J Stroke Cerebrovasc Dis 2019; 29:104464. [PMID: 31699576 DOI: 10.1016/j.jstrokecerebrovasdis.2019.104464] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Accepted: 10/07/2019] [Indexed: 11/29/2022] Open
Abstract
INTRODUCTION Emergency departments play a key role in the diagnosis and treatment of transient ischemic attacks, but limited data are available about the early management of such patients in emergency wards. Therefore, we aimed to evaluate emergency physicians' management of transient ischemic attack and analyze variations factors. METHODS A multicenter survey among emergency physicians of the Grand Est region network (Est-RESCUE) was conducted from January 28th to March 28th, 2019. Medical and administrative data were collected by the same network and the national directory of medical resources. RESULTS Among 542 emergency physicians recipients, 78 answered (14%) and 71 were finally included, practicing in 25 public hospitals homogeneously distributed across the territory, including 3 university hospitals. A cerebral magnetic resonance imaging was obtained for 75%-100% of patients by 4.3% of responders, 36.4% of which were performed within more than 24 hours. A cardiac monitoring was prescribed in 75%-100% of cases by 32.4% of responders. A neurologic consultation was routinely requested by 84.6% of responders practicing in a university hospital and 36.8% of responders practicing in a community hospital (P = .02). Patients were hospitalized in a neurovascular unit in 75%-100% of cases by 17.4% of responders, which happened more likely in university hospitals (P < .001). CONCLUSIONS Transient ischemic attack suffers from management disparities across territories, due to limited access to technical facilities and neurologic consultations. Therefore, international recommendations are too often not followed. Implementation of territorial neurovascular tracks may help to standardize the management of these patients.
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Affiliation(s)
| | | | - Sophie Lefour
- Department of Neurology, Reims University Hospital, Reims, France
| | - Serge Bakchine
- Department of Neurology, Reims University Hospital, Reims, France
| | - Quentin Marion
- Emergency Department, Reims University Hospital, Reims, France
| | - Coralie Barbe
- Department of Research and Public Health, Reims University Hospital, Reims, France
| | - Stéphane Gennai
- Emergency Department, Reims University Hospital, Reims, France.
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Dong S, Guo J, Fang J, Hong Y, Cui S, He L. Low-dose statin pretreatment reduces stroke severity and improves functional outcomes. J Neurol 2019; 266:2970-2978. [PMID: 31468121 DOI: 10.1007/s00415-019-09520-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 08/24/2019] [Accepted: 08/24/2019] [Indexed: 02/05/2023]
Abstract
OBJECTIVES Pre-stroke statin use reduces stroke severity and improves functional outcomes; however, whether low-dose statins as a primary preventive measure have similar effects on the Chinese population remains unclear. METHODS Consecutive cases of ischaemic stroke between May 2011 and January 2017 were retrospectively analysed. The primary endpoints were stroke severity on admission and functional outcomes at 90 days. The secondary endpoints were factors related to lower stroke severity on admission. Propensity score matching and logistic regression analyses were performed. RESULTS Of the 1878 patients, 6.4% and 23.8% were pre-stroke statin users before and after propensity matching, respectively, reducing the National Institutes of Health Stroke Scale (NIHSS) score on admission from 5 (2-9) to 3 (2-4) (P < 0.001). Patients receiving pretreatment with low-dose statins tended to have a better mRS distribution (median mRS score 2 [1-3] vs. 3 [2-4], P = 0.007) and a higher likelihood of favourable functional outcomes (FFOs) at 90 days (61 [65.6%] vs. 151 [50.8%], P = 0.005). The logistic regression analysis showed that low-dose statins taken before stroke (odds ratio [OR] = 0.15, 95% confidence interval [CI] = 0.08-0.27, P < 0.001) and being male (OR = 0.81, 95% CI = 0.66-0.99, P = 0.035) were related to a lower stroke severity on admission but not among patients with atrial fibrillation (OR = 1.65, 95% CI = 1.12-2.44, P = 0.012) or elevated white blood cell (WBC) counts (OR = 1.12, 95% CI = 1.08-1.17, P < 0.001). CONCLUSIONS Pretreatment with low-dose statins reduced initial stroke severity, improved functional outcomes at 90 days and was independently associated with a lower stroke severity on admission among Chinese patients.
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Affiliation(s)
- Shuju Dong
- Department of Neurology, West China Hospital, Chengdu, Sichuan Province, China
| | - Jian Guo
- Department of Neurology, West China Hospital, Chengdu, Sichuan Province, China
| | - Jinghuan Fang
- Department of Neurology, West China Hospital, Chengdu, Sichuan Province, China
| | - Ye Hong
- Department of Neurology, West China Hospital, Chengdu, Sichuan Province, China
| | - Shuhui Cui
- Department of Neurology, West China Hospital, Chengdu, Sichuan Province, China
| | - Li He
- Department of Neurology, West China Hospital, Chengdu, Sichuan Province, China.
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