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Magyar-Stang R, István L, Pál H, Csányi B, Gaál A, Mihály Z, Czinege Z, Sótonyi P, Tamás H, Koller A, Bereczki D, Kovács I, Debreczeni R. Impaired cerebrovascular reactivity correlates with reduced retinal vessel density in patients with carotid artery stenosis: Cross-sectional, single center study. PLoS One 2023; 18:e0291521. [PMID: 37708176 PMCID: PMC10501613 DOI: 10.1371/journal.pone.0291521] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 08/23/2023] [Indexed: 09/16/2023] Open
Abstract
BACKGROUND The cerebral and retinal circulation systems are developmentally, anatomically, and physiologically interconnected. Thus, we hypothesized that hypoperfusion due to atherosclerotic stenosis of the internal carotid artery (ICA) can result in disturbances of both cerebral and retinal microcirculations. We aimed to characterize parameters indicating cerebrovascular reactivity (CVR) and retinal microvascular density in patients with ICA stenosis, and assess if there is correlation between them. METHODS In this cross-sectional study the middle cerebral artery (MCA) blood flow velocity was measured by transcranial Doppler (TCD) and, simultaneously, continuous non-invasive arterial blood pressure measurement was performed on the radial artery by applanation tonometry. CVR was assessed based on the response to the common carotid artery compression (CCC) test. The transient hyperemic response ratio (THRR) and cerebral arterial resistance transient hyperemic response ratio (CAR-THRR) were calculated. Optical coherence tomography angiography (OCTA) was used to determine vessel density (VD) on the papilla whole image for all (VDP-WIall) and for small vessels (VDP-WIsmall). The same was done in the peripapillary region: all (VDPPall), and small (VDPPsmall) vessels. The VD of superficial (VDMspf) and deep (VDMdeep) macula was also determined. Significance was accepted when p<0.05. RESULTS Twenty-four ICA stenotic patients were evaluated. Both CVR and retinal VD were characterized. There was a significant, negative correlation between CAR-THRR (median = -0.40) and VDPPsmall vessels (median = 52%), as well as between VDPPall vessels (median = 58%), and similar correlation between CAR-THRR and VDP-WIsmall (median = 49.5%) and between VDP-WIall (median = 55%). CONCLUSION The significant correlation between impaired cerebrovascular reactivity and retinal vessel density in patients with ICA stenosis suggests a common mechanism of action. We propose that the combined use of these diagnostic tools (TCD and OCTA) helps to better identify patients with increased ischemic or other cerebrovascular risks.
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Affiliation(s)
- Rita Magyar-Stang
- Department of Neurology, Semmelweis University, Budapest, Hungary
- Szentágothai Doctoral School of Neurosciences, Semmelweis University, Budapest, Hungary
| | - Lilla István
- Department of Ophthalmology, Semmelweis University, Budapest, Hungary
| | - Hanga Pál
- Department of Neurology, Semmelweis University, Budapest, Hungary
- Szentágothai Doctoral School of Neurosciences, Semmelweis University, Budapest, Hungary
| | - Borbála Csányi
- Faculty of Medicine, Semmelweis University, Budapest, Hungary
| | - Anna Gaál
- Faculty of Medicine, Semmelweis University, Budapest, Hungary
| | - Zsuzsanna Mihály
- Department of Vascular and Endovascular Surgery, Semmelweis University, Budapest, Hungary
| | - Zsófia Czinege
- Department of Vascular and Endovascular Surgery, Semmelweis University, Budapest, Hungary
| | - Péter Sótonyi
- Department of Vascular and Endovascular Surgery, Semmelweis University, Budapest, Hungary
| | - Horváth Tamás
- Research Center for Sport Physiology, Hungarian University of Sports Science, Budapest, Hungary
| | - Akos Koller
- Research Center for Sport Physiology, Hungarian University of Sports Science, Budapest, Hungary
- Department of Morphology&Physiology, Faculty of Health Sciences, and Translational Medicine Institute, Faculty of Medicine, and ELKH-SE, Cerebrovascular and Neurocognitive Disorders Research Group, Semmelweis University, Budapest, Hungary
- Department of Physiology, New York Medical College, Valhalla, NY, United States of America
| | - Dániel Bereczki
- Department of Neurology, Semmelweis University, Budapest, Hungary
| | - Illés Kovács
- Department of Ophthalmology, Semmelweis University, Budapest, Hungary
- Department of Ophthalmology, Weill Cornell Medical College, New York, NY, United States of America
- Department of Clinical Ophthalmology, Semmelweis University, Budapest, Hungary
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Zhang Y, Tang J, Ren G, Zhao K, Wang X. Global potential distribution prediction of Xanthium italicum based on Maxent model. Sci Rep 2021; 11:16545. [PMID: 34400696 PMCID: PMC8368065 DOI: 10.1038/s41598-021-96041-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 07/28/2021] [Indexed: 11/20/2022] Open
Abstract
Alien invasive plants pose a threat to global biodiversity and the cost of control continues to rise. Early detection and prediction of potential risk areas are essential to minimize ecological and socio-economic costs. In this study, the Maxent model was used to predict current and future climatic conditions to estimate the potential global distribution of the invasive plant Xanthium italicum. The model consists of 366 occurrence records (10 repeats, 75% for calibration and 25% for verification) and 10 climate prediction variables. According to the model forecast, the distribution of X. italicum was expected to shrink in future climate scenarios with human intervention, which may be mainly caused by the rise in global average annual temperature. The ROC curve showed that the AUC values of the training set and the test set are 0.965 and 0.906, respectively, indicating that the prediction result of this model was excellent. The contribution rates of annual mean temperature, monthly mean diurnal temperature range, standard deviation of temperature seasonal change and annual average precipitation to the geographical distribution of X. italicum were 65.3%, 11.2%, 9.0%, and 7.7%, respectively, and the total contribution rate was 93.2%. These four variables are the dominant environmental factors affecting the potential distribution of X. italicum, and the influence of temperature is greater than that of precipitation. Through our study on the potential distribution prediction of X. italicum under the future climatic conditions, it has contribution for all countries to strengthen its monitoring, prevention and control, including early warning.
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Affiliation(s)
- Yang Zhang
- College of Computer Science and Technology, Henan Institute of Technology, Henan, 453003, China. .,Institute of Data Mining and Intelligent Computing, Henan Institute of Technology, Henan, 453003, China.
| | - Jieshi Tang
- College of Life Science, Sichuan University, Chengdu, 610000, China
| | - Gang Ren
- College of Computer Science and Technology, Henan Institute of Technology, Henan, 453003, China
| | - Kaixin Zhao
- College of Computer Science and Technology, Henan Institute of Technology, Henan, 453003, China
| | - Xianfang Wang
- College of Computer Science and Technology, Henan Institute of Technology, Henan, 453003, China.,Institute of Data Mining and Intelligent Computing, Henan Institute of Technology, Henan, 453003, China
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