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Ahmad AF, Galassi FM, Burlakoti A, Vaccarezza M, Papa V. Human cerebral blood supply via circulus arteriosus cerebri: A scoping review on its variations and clinical implications. Heliyon 2024; 10:e32648. [PMID: 38975214 PMCID: PMC11225744 DOI: 10.1016/j.heliyon.2024.e32648] [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: 02/07/2024] [Revised: 06/06/2024] [Accepted: 06/06/2024] [Indexed: 07/09/2024] Open
Abstract
Background Circulus arteriosus cerebri (CAC), responsible for supplying blood to the brain, presents anatomical variations that have been associated with both haemorrhagic and ischemic strokes. Therefore, it is crucial to conduct comprehensive investigations and comparisons of the diverse variant components of the CAC, published in various journals, and analyze them to identify individuals at risk of cerebrovascular pathologies, thereby ensuring enhanced and timely treatment. Methods A scoping review according to the five-stage protocol by Arksey and O'Malley was performed between February and June 2023. Seven hundred and seventy-seven records were initially identified, and a total of 51 studies were finally included. Results This scoping review focuses on the anatomical variations of the CAC and their clinical implications on cerebrovascular disease and includes more original articles than review s. Consistent with previous findings, most of the records included small populations or samples, while only three records reported larger populations. Surprisingly, the populations enclosed in the included records consisted of autopsied cadaveric specimens more than living subjects. Finally, the qualitative analysis highlighted three main themes concerning the relationship between the normal CAC morphology and the cerebrovascular disease onset as well as the variant CAC morphology and its main features that might be also involved in these diseases. Finally, techniques that can be used to measure CAC have also been assessed. Conclusion Variations in the CAC, more common in the posterior part, with genetic and environmental factors influencing these variations impact cerebrovascular disorders. Understanding variants components of CAC can aid in improving brain surgeries and post-stroke care.
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Affiliation(s)
- Adilah F. Ahmad
- Curtin Medical School, Faculty of Health Sciences, Curtin University, Bentley, Perth WA, Australia
| | - Francesco M. Galassi
- Department of Anthropology, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
| | - Arjun Burlakoti
- UniSA Allied Health and Human Performance, University of South Australia, Adelaide, SA, Australia
| | - Mauro Vaccarezza
- Curtin Medical School, Faculty of Health Sciences, Curtin University, Bentley, Perth WA, Australia
- Curtin Health Innovation Research Institute (CHIRI), Curtin University, Bentley, Perth WA, Australia
- Department of Environmental and Preventive Sciences, University of Ferrara, Ferrara, Italy
| | - Veronica Papa
- Forensic Anthropology, Paleopathology and Bioarchaeology (FAPAB) Research Center, Avola, Italy
- Department of Economics, Law, Cybersecurity, and Sports Sciences, University of Naples "Parthenope," Naples, Italy
- School of Science, Engineering and Health, University of Naples "Parthenope," Naples, Italy
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Ping S, Qiu X, Kyle M, Hughes K, Longo J, Zhao LR. Stem cell factor and granulocyte colony-stimulating factor promote brain repair and improve cognitive function through VEGF-A in a mouse model of CADASIL. Neurobiol Dis 2019; 132:104561. [PMID: 31376480 DOI: 10.1016/j.nbd.2019.104561] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 06/28/2019] [Accepted: 07/30/2019] [Indexed: 12/17/2022] Open
Abstract
Cerebral autosomal dominant arteriopathy with subcortical infarct and leukoencephalopathy (CADASIL) is a cerebral small vascular disease caused by NOTCH3 gene mutation in vascular smooth muscle cells (VSMCs), leading to ischemic stroke and vascular dementia. To date, the pathogenesis of CADASIL remains poorly understood, and there is no treatment that can slow the progression of CADASIL. Using a transgenic mouse model of CADASIL (TgNotch3R90C), this study reveals novel findings for understanding CADASIL pathogenesis that decreased cerebral vascular endothelial growth factor (VEGF/VEGF-A) is linked to reduced cerebral blood vessel density. Reduced endothelial cell (EC) proliferation and angiogenesis are seen in TgNotch3R90C mouse brain-isolated ECs. Decreased dendrites, axons, and synapses in the somatosensory and motor cortex layer 2/3 and in the hippocampal CA1, and reduced neurogenesis in both the subventricular zone and subgranular zone occur in 15-month-old TgNotch3R90C mice. These reductions in neuron structures, synapses, and neurogenesis are significantly correlated to decreased cerebral vasculature in the corresponding areas. Impaired spatial learning and memory in TgNotch3R90C mice are significantly correlated with the reduced cerebral vasculature, neuron structures, and synapses. Repeated treatment of stem cell factor and granulocyte colony-stimulating factor (SCF+G-CSF) at 9 and 10 months of age improves cognitive function, increases cerebral VEGF/VEGF-A, restores cerebral vasculature, and enhances regeneration of neuronal structures, synaptogenesis and neurogenesis in TgNotch3R90C mice. Pretreatment with Avastin, an angiogenesis inhibitor by neutralizing VEGF-A, completely eliminates the SCF+G-CSF-enhanced cognitive function, vascular and neuronal structure regeneration, synaptogenesis and neurogenesis in TgNotch3R90C mice. SCF+G-CSF-enhanced EC proliferation and angiogenesis in TgNotch3R90C mouse brain-isolated ECs are also blocked by Avastin pretreatment. These data suggest that SCF+G-CSF treatment may repair Notch3R90C mutation-damaged brain through the VEGF-A-mediated angiogenesis. This study provides novel insight into the involvement of VEGF/VEGF-A in the pathogenesis of CADASIL and sheds light on the mechanism underlying the SCF+G-CSF-enhanced brain repair in CADASIL.
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Affiliation(s)
- Suning Ping
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, USA
| | - Xuecheng Qiu
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, USA
| | - Michele Kyle
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, USA
| | - Karen Hughes
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, USA
| | - John Longo
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, USA
| | - Li-Ru Zhao
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, USA.
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Genetic and Environmental Contributions to Variation in the Posterior Communicating Collaterals of the Circle of Willis. Transl Stroke Res 2019; 10:189-203. [PMID: 29589286 DOI: 10.1007/s12975-018-0626-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/14/2018] [Accepted: 03/16/2018] [Indexed: 02/07/2023]
Abstract
Variation in blood flow mediated by the posterior communicating collateral arteries (PComs) contributes to variation in the severity of tissue injury in obstructive disease. Evidence in animals and humans indicates that differences in the extent of PComs, i.e., their anatomic lumen diameter and whether they are present bilaterally, unilaterally, or absent, are a major factor. These differences arise during development since they are present at birth. However, the causal mechanisms are unknown. We used angiography after maximal dilation to examine involvement of genetic, environmental, and stochastic factors. The extent of PComs varied widely among seven genetically diverse strains of mice. Like pial collaterals in the microcirculation, aging and hypertension reduced PCom diameter, while in contrast, obesity, hyperlipidemia, metabolic syndrome, and diabetes mellitus had no effect. Naturally occurring intrauterine growth restriction had no effect on extent of PCom or pial collaterals in the adult. The number and diameter of PComs evidenced much larger apparent stochastic-dependent variation than pial collaterals. In addition, both PComs underwent flow-mediated outward remodeling after unilateral permanent MCA occlusion that varied with genetic background and was greater on the ipsilesional side. These findings indicate that variation in the number and diameter of PCom collateral arteries arises from stochastic factors and naturally occurring genetic variants that differ from those that cause variation in pial collateral arterioles. Environmental factors also contribute: aging and hypertension reduce PCom diameter. Our results suggest possible sources of variation of PComs in humans and provide information relevant when studying mouse models of occlusive cerebrovascular disease.
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Sánchez van Kammen M, Moomaw CJ, van der Schaaf IC, Brown RD, Woo D, Broderick JP, Mackey JS, Rinkel GJE, Huston J, Ruigrok YM. Heritability of circle of Willis variations in families with intracranial aneurysms. PLoS One 2018; 13:e0191974. [PMID: 29377946 PMCID: PMC5788367 DOI: 10.1371/journal.pone.0191974] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 01/15/2018] [Indexed: 11/24/2022] Open
Abstract
Background Intracranial aneurysms more often occur in the same arterial territory within families. Several aneurysm locations are associated with specific circle of Willis variations. We investigated whether the same circle of Willis variations are more likely to occur in first-degree relatives than in unrelated individuals. Methods We assessed four circle of Willis variations (classical, A1-asymmetry, incomplete posterior communicating artery and fetal circulation) in two independent groups of families with familial aneurysms and ≥2 first-degree relatives with circle of Willis imaging on MRA/CTA. In each (index) family we determined the proportion of first-degree relatives with the same circle of Willis variation as the proband and compared it to the proportion of first-degree relatives of a randomly selected unrelated (comparison) family who had the same circle of Willis variation as the index family’s proband. Concordance in index families and comparison families was compared with a conditional logistic events/trials model. The analysis was simulated 1001 times; we report the median concordances, odds ratios (ORs), and 95% confidence intervals (95%CI). The groups were analysed separately and together by meta-analysis. Results We found a higher overall concordance in circle of Willis configuration in index families than in comparison families (meta-analysis, 244 families: OR 2.2, 95%CI 1.6–3.0) mostly attributable to a higher concordance in incomplete posterior communicating artery (meta-analysis: OR 2.8, 95%CI 1.8–4.3). No association was found for the other three circle of Willis variations. Conclusions In two independent groups of families with familial aneurysms, the incomplete PcomA variation occurred more often within than between families suggesting heritability of this circle of Willis variation. Further studies should investigate genetic variants associated with circle of Willis formation.
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Affiliation(s)
- Mayte Sánchez van Kammen
- Department of Neurology and Neurosurgery, University Medical Centre Utrecht, Utrecht, the Netherlands
| | - Charles J. Moomaw
- Department of Neurology and Rehabilitation Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
| | | | - Robert D. Brown
- Department of Neurology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Daniel Woo
- Department of Neurology and Rehabilitation Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Joseph P. Broderick
- Department of Neurology and Rehabilitation Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Jason S. Mackey
- Department of Neurology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Gabriël J. E. Rinkel
- Department of Neurology and Neurosurgery, University Medical Centre Utrecht, Utrecht, the Netherlands
| | - John Huston
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Ynte M. Ruigrok
- Department of Neurology and Neurosurgery, University Medical Centre Utrecht, Utrecht, the Netherlands
- * E-mail:
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Zaninovich OA, Ramey WL, Walter CM, Dumont TM. Completion of the Circle of Willis Varies by Gender, Age, and Indication for Computed Tomography Angiography. World Neurosurg 2017; 106:953-963. [PMID: 28736349 DOI: 10.1016/j.wneu.2017.07.084] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 07/14/2017] [Accepted: 07/15/2017] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The circle of Willis (CoW) is the foremost anastomosis and blood distribution center of the brain. Its effectiveness depends on its completion and the size and patency of its vessels. Gender-related and age-related anatomic variations in the CoW may play an important role in the pathogenesis of cerebrovascular diseases. In this study, we analyzed computed tomography angiograms (CTAs) to assess for differences in CoW completion related to gender, age, and indication for CTA. METHODS A total of 834 CTAs were retrospectively analyzed for all CoW vessels to compare the incidence of complete CoW and variation frequency based on gender, age, and indication. RESULTS The incidence of complete CoW was 37.1% overall. CoW completion showed a statistically significant decrease with increasing age for all age groups in both men (47.0%, 29.4%, 18.8%) and women (59.1%, 44.2%, 30.9%). Completion was greater in women (43.8%) than in men (31.2%) overall and for all age groups. These gender differences were all statistically significant except for the 18-39 years age group. The most frequent of the 28 CoW variations were absent posterior communicating artery (PCOM) bilaterally (17.1%), right PCOM (15.3%), and left PCOM (10.9%). Ischemic stroke and the 18-39 years age group of hemorrhagic stroke showed a statistically significant reduction in completion relative to trauma. CONCLUSIONS The incidence of complete CoW is likely greater in women for all age groups and likely decreases with age in both genders. The most frequently absent vessel is likely the PCOM, either unilaterally or bilaterally. Completion may play a role in ischemic stroke and a subset of patients with hemorrhagic stroke.
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Affiliation(s)
| | - Wyatt L Ramey
- Division of Neurosurgery, Banner University Medical Center, Tucson, Arizona, USA
| | - Christina M Walter
- Division of Neurosurgery, Banner University Medical Center, Tucson, Arizona, USA
| | - Travis M Dumont
- Division of Neurosurgery, Banner University Medical Center, Tucson, Arizona, USA.
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Bourcier R, Lenoble C, Guyomarch-Delasalle B, Daumas-Duport B, Papagiannaki C, Redon R, Desal H. Is there an inherited anatomical conformation favoring aneurysmal formation of the anterior communicating artery? J Neurosurg 2016; 126:1598-1605. [PMID: 27315030 DOI: 10.3171/2016.4.jns153032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The pathophysiological mechanisms responsible for the formation of intracranial aneurysms (IAs) remain only partially elucidated. However, current evidence suggests a genetic component. The purpose of this study was to investigate the specific anatomical variations in the arterial complex that are associated with the presence of anterior communicating artery (ACoA) aneurysms in the familial forms of IAs. METHODS This multicenter study investigated bifurcation IAs in patients who had a sporadic ACoA IA without a family history of IA (SACAA group), in patients who had an ACoA IA with a family history of IA (FACAA group), and in their healthy first-degree relatives (HFDRs). Through the use of MR angiography (MRA) reconstructions, the symmetry of the A1 segments and the angle between the A1 and A2 segments were analyzed on 3D models for each group. These measurements were then compared among the 3 groups. RESULTS Twenty-four patients with SACAA, 24 patients with FACAA, and 20 HFDRs were included in the study. Asymmetrical configuration of the A1 segments was more frequent in the FACAA group than in the HFDR group (p = 0.002). The aneurysm-side A1-A2 angle was lower in the FACAA group (p = 0.003) and SACAA group (p = 0.007) than in the HFDR group. On the contralateral side, there was no difference in A1-A2 angles between groups. CONCLUSIONS The anatomical shape of the ACoA complex seems to be similarly associated with the presence of ACoA IAs in both the FACAA and SACAA groups. This highlights the role played by hemodynamic constraints in aneurysm formation and questions the hypothesis of the hereditary character of these anatomical shapes.
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Affiliation(s)
- Romain Bourcier
- Department of Diagnostic and Interventional Neuroradiology, Hospital Guillaume et René Laennec.,CNRS, UMR 6291, Université de Nantes, Nantes; and
| | - Cédric Lenoble
- Department of Diagnostic and Interventional Neuroradiology, Hospital Guillaume et René Laennec
| | | | - Benjamin Daumas-Duport
- Department of Diagnostic and Interventional Neuroradiology, Hospital Guillaume et René Laennec
| | | | - Richard Redon
- INSERM, UMR1087, l'institut du thorax, CHU de Nantes.,CNRS, UMR 6291, Université de Nantes, Nantes; and
| | - Hubert Desal
- Department of Diagnostic and Interventional Neuroradiology, Hospital Guillaume et René Laennec.,CNRS, UMR 6291, Université de Nantes, Nantes; and
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Rätsep MT, Hickman AF, Croy BA. The Elsevier trophoblast research award lecture: Impacts of placental growth factor and preeclampsia on brain development, behaviour, and cognition. Placenta 2016; 48 Suppl 1:S40-S46. [PMID: 26880207 DOI: 10.1016/j.placenta.2016.02.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 01/19/2016] [Accepted: 02/03/2016] [Indexed: 12/17/2022]
Abstract
Preeclampsia (PE) is a significant gestational disorder affecting 3-5% of all human pregnancies. In many PE pregnancies, maternal plasma is deficient in placental growth factor (PGF), a placentally-produced angiokine. Beyond immediate fetal risks associated with acute termination of the pregnancy, offspring of PE pregnancies (PE-F1) have higher long-term risks for hypertension, stroke, and cognitive impairment compared to F1s from uncomplicated pregnancies. At present, mechanisms that explain PE-F1 gains in postpartum risks are poorly understood. Our laboratory found that mice genetically-deleted for Pgf have altered fetal and adult brain vascular development. This is accompanied by sexually dimorphic alterations in anatomic structure in the adult Pgf-/- brain and impaired cognitive functions. We hypothesize that cerebrovascular and neurological aberrations occur in fetuses exposed to the progressive development of PE and that these brain changes impair cognitive functioning, enhance risk for stroke, elevate severity of stroke, and lead to worse stroke outcomes. These brain and placental outcomes may be linked to down-regulated PGF gene expression in early pre-implantation embryos, prior to gastrulation. This review explores our hypothesis that there are mechanistic links between low PGF detection in maternal plasma prodromal to PE, PE, and altered brain vascular, structural, and functional development amongst PE-F1s. We also include a summary of preliminary outcomes from a pilot study of 7-10 year old children that is the first to report magnetic resonance imaging, magnetic resonance angiography, and functional brain region assessment by eye movement control studies in PE-F1s.
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Affiliation(s)
- Matthew T Rätsep
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada.
| | - Andrew F Hickman
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - B Anne Croy
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
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8
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Luna RL, Kay VR, Rätsep MT, Khalaj K, Bidarimath M, Peterson N, Carmeliet P, Jin A, Croy BA. Placental growth factor deficiency is associated with impaired cerebral vascular development in mice. Mol Hum Reprod 2016; 22:130-42. [PMID: 26646502 PMCID: PMC4733225 DOI: 10.1093/molehr/gav069] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 11/23/2015] [Accepted: 11/27/2015] [Indexed: 12/23/2022] Open
Abstract
STUDY HYPOTHESIS Placental growth factor (PGF) is expressed in the developing mouse brain and contributes to vascularization and vessel patterning. STUDY FINDING PGF is dynamically expressed in fetal mouse brain, particularly forebrain, and is essential for normal cerebrovascular development. WHAT IS KNOWN ALREADY PGF rises in maternal plasma over normal human and mouse pregnancy but is low in many women with the acute onset hypertensive syndrome, pre-eclampsia (PE). Little is known about the expression of PGF in the fetus during PE. Pgf (-/-) mice appear normal but recently cerebral vascular defects were documented in adult Pgf (-/-) mice. STUDY DESIGN, SAMPLES/MATERIALS, METHODS Here, temporal-spatial expression of PGF is mapped in normal fetal mouse brains and cerebral vasculature development is compared between normal and congenic Pgf (-/-) fetuses to assess the actions of PGF during cerebrovascular development. Pgf/PGF, Vegfa/VEGF, Vegf receptor (Vegfr)1 and Vegfr2 expression were examined in the brains of embryonic day (E)12.5, 14.5, 16.5 and 18.5 C57BL/6 (B6) mice using quantitative PCR and immunohistochemistry. The cerebral vasculature was compared between Pgf (-/-) and B6 embryonic and adult brains using whole mount techniques. Vulnerability to cerebral ischemia was investigated using a left common carotid ligation assay. MAIN RESULTS AND THE ROLE OF CHANCE Pgf/PGF and Vegfr1 are highly expressed in E12.5-14.5 forebrain relative to VEGF and Vegfr2. Vegfa/VEGF is relatively more abundant in hindbrain (HB). PGF and VEGF expression were similar in midbrain. Delayed HB vascularization was seen at E10.5 and 11.5 in Pgf (-/-) brains. At E14.5, Pgf (-/-) circle of Willis showed unilateral hypoplasia and fewer collateral vessels, defects that persisted post-natally. Functionally, adult Pgf (-/-) mice experienced cerebral ischemia after left common carotid arterial occlusion while B6 mice did not. LIMITATIONS, REASONS FOR CAUTION Since Pgf (-/-) mice were used, consequences of complete absence of maternal and fetal PGF were defined. Therefore, the effects of maternal versus fetal PGF deficiency on cerebrovascular development cannot be separated. However, as PGF was strongly expressed in the developing brain at all timepoints, we suggest that local PGF has a more important role than distant maternal or placental sources. Full PGF loss is not expected in PE pregnancies, predicting that the effects of PGF deficiency identified in this model will be more severe than any effects in PE-offspring. WIDER IMPLICATIONS OF THE FINDINGS These studies provoke the question of whether PGF expression is decreased and cerebral vascular maldevelopment occurs in fetuses who experience a preeclamptic gestation. These individuals have already been reported to have elevated risk for stroke and cognitive impairments. LARGE SCALE DATA N/A. STUDY FUNDING AND COMPETING INTERESTS This work was supported by awards from the Natural Sciences and Engineering Research Council, the Canada Research Chairs Program and the Canadian Foundation for Innovation to B.A.C. and by training awards from the Universidade Federal de Pernambuco and Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Brazil to R.L.L.; Queen's University to V.R.K. and the Canadian Institutes of Health Research to M.T.R. The work of P.C. is supported by the Belgian Science Policy BELSPO-IUAP7/03, Structural funding by the Flemish Government-Methusalem funding, and the Flemish Science Fund-FWO grants. There were no competing interests.
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Affiliation(s)
- Rayana Leal Luna
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON K7L 3N6, Canada Federal University of Pernambuco - UFPE, Recife, Pernambuco 50670-901, Brazil
| | - Vanessa R Kay
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON K7L 3N6, Canada
| | - Matthew T Rätsep
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON K7L 3N6, Canada
| | - Kasra Khalaj
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON K7L 3N6, Canada
| | - Mallikarjun Bidarimath
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON K7L 3N6, Canada
| | - Nichole Peterson
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON K7L 3N6, Canada
| | - Peter Carmeliet
- Laboratory of Angiogenesis and Neurovascular Link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven, Belgium
| | - Albert Jin
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON K7L 3N6, Canada
| | - B Anne Croy
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON K7L 3N6, Canada
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Endothelial proliferation modulates neuron-glia survival and differentiation in ischemic stress. Ann Neurosci 2015; 22:150-61. [PMID: 26130923 PMCID: PMC4481556 DOI: 10.5214/ans.0972.7531.220305] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 01/06/2015] [Accepted: 02/06/2015] [Indexed: 12/03/2022] Open
Abstract
Background Recent studies have shown that endothelial proliferation and angiogenic response are characteristic of degenerative events, such that the magnitude of endothelial activation is reflective of the progression of neurodegeneration. Purpose This study sets out to, compare, the degenerative changes seen in the parietal cortex (PC) and periventricular zone (PVZ) after cyanide toxicity or vascular occlusion. Methods Global vascular occlusion (VO) and cyanide toxicity (CN) were induced in separate sets of male adult wistar rats for 10 days (treatment phase). Subsequently, the treatment was discontinued for another 10 days (withdrawal phase) (CN-I and VO-I). A separate group of control was maintained for 10 days and received normal saline for this duration. The animals were euthanized at day 10 (treatment and control) and day 20 (withdrawal) after which the tissue was processed for antigen retrieval immunohistochemistry to demonstrate; H&E (general histology) CD31/PECAM 1(endothelial proliferation), CD45 (monocyte/phagocyte), GFAP (glia), NSE (neuron), Ki-67 (cell proliferation) and NF (neurofilament). Total cell count, immunopositive cell counts, arterial wall thickness and lumen width were determined and plotted using ANOVA with significance set at P<0.05*. Results We observed an increase in endothelial proliferation (↑CD31), glia activation and a decrease in neuron count in vascular occlusion and cyanide toxicity after the treatment phase (degeneration). The neuron count increased (↑NSE) after withdrawal of cyanide treatment and vascular occlusion and was accompanied by a corresponding decrease in endothelial and glia activation (↓CD31/GFAP). Degenerative changes were more prominent in cyanide toxicity when compared with vascular occlusion. The increase in CD45 expression coupled with a reduced CD31/GFAP after the withdrawal phase was evident of vascular remodeling and neurosurvival. Conclusion We conclude that neuronal degeneration in cyanide toxicity or vascular occlusion is dependent on an increase in endothelial proliferation (↑CD31), glia activation (↑GFAP) and a decrease in monocyte expression (↓CD45); representing a pro-inflammatory response. Furthermore, cyanide toxicity induced more prominent degenerative changes when compared with the vascular occlusion due to a higher CD31/GFAP expression. Subsequent withdrawal of the ischemia facilitated a reduction in GFAP/CD31 with a corresponding increase in monocytes (↑CD45) for vascular remodeling and neurosurvival. The VO-I showed a significant increase in vascular remodelling than the CN-I due to a more significant increase in monocytic expression (CD45) after the withdrawal of the occlusion. Generally, we found that degeneration was prominent in the parietal cortex and less in the periventricular zone for both forms of ischemia.
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Li Z, Huo X, Zhang S, Lu J, Li C, Guo M, Fu R, He Z, Du X, Chen Z. Selection of genes associated with variations in the Circle of Willis in gerbils using suppression subtractive hybridization. PLoS One 2015; 10:e0127355. [PMID: 25973917 PMCID: PMC4431780 DOI: 10.1371/journal.pone.0127355] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Accepted: 04/14/2015] [Indexed: 12/27/2022] Open
Abstract
Deformities in the Circle of Willis (CoW) can significantly increase the risk of cerebrovascular disease in humans. However, the molecular mechanisms underlying these deformities have not been understood. Based on our previous studies, variations in the CoW of gerbils are hereditary. A normal CoW is observed in approximately 60% of gerbils, a percentage that also applies to humans. Thus, gerbil is an ideal experimental model for studying variations in the CoW. To study the mechanisms underlying these variations, we selected genes associated with different types of the CoW using suppression subtractive hybridization (SSH). After evaluating the efficiency of SSH using quantitative real-time polymerase chain reaction (qPCR) on subtracted and unsubtracted cDNA and Southern blotting on SSH PCR products, 12 SSH libraries were established. We identified 4 genes (CST3, GNAS, GPx4 and PFN2) associated with variations in the CoW. These genes were identified with qPCR and Western blotting using 70 expressed sequence tags from the SSH libraries. Cloning and sequencing allowed us to demonstrate that the 4 genes were closely related to mouse genes. We may assume that these 4 genes play an important role in the development of variations in the CoW. This study provides a foundation for further research of genes related to development of variations in the CoW and the mechanisms of dysmorphosis of cerebral vessels.
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Affiliation(s)
- Zhenkun Li
- Department of Laboratory Animal Science, School of Basic Medical Science, Capital Medical University, Beijing 100069, China
| | - Xueyun Huo
- Department of Laboratory Animal Science, School of Basic Medical Science, Capital Medical University, Beijing 100069, China
| | - Shuangyue Zhang
- Department of Laboratory Animal Science, School of Basic Medical Science, Capital Medical University, Beijing 100069, China
| | - Jing Lu
- Department of Laboratory Animal Science, School of Basic Medical Science, Capital Medical University, Beijing 100069, China
| | - Changlong Li
- Department of Laboratory Animal Science, School of Basic Medical Science, Capital Medical University, Beijing 100069, China
| | - Meng Guo
- Department of Laboratory Animal Science, School of Basic Medical Science, Capital Medical University, Beijing 100069, China
| | - Rui Fu
- Institute for Laboratory Animal Resources, National Institutes for Food and Drug Control, Beijing 100050, China
| | - Zhengming He
- Institute for Laboratory Animal Resources, National Institutes for Food and Drug Control, Beijing 100050, China
| | - Xiaoyan Du
- Department of Laboratory Animal Science, School of Basic Medical Science, Capital Medical University, Beijing 100069, China
- * E-mail: (ZC); (XD)
| | - Zhenwen Chen
- Department of Laboratory Animal Science, School of Basic Medical Science, Capital Medical University, Beijing 100069, China
- * E-mail: (ZC); (XD)
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Blei F. Update December 2013. Lymphat Res Biol 2013. [DOI: 10.1089/lrb.2013.1142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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