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Cholestyramine resin administration alleviated cerebral ischemic injury in obese mice by improving gut dysbiosis and modulating the bile acid profile
In conclusion, Obesity induces gut dysbiosis, worsens stroke outcomes, and perturbs the BA profile. The dysbiotic microbiome is an important linkage between obesity and stroke. CR confers metabolic benefits and neuroprotective effects in obesity, perhaps by modulating gut microbial composition and BA metabolism.PMID:36179877 | DOI:10.1016/j.expneurol.2022.114234
Source: Experimental Neurology - September 30, 2022 Category: Neurology Authors: Jianhai Liang Mingsi Zhang Huidi Wang Yueran Ren Qiheng Wu Ranshi Huang Jiahui Xie Jia Yin Jiajia Zhu Source Type: research

Formic acid induces hypertension-related hemorrhage in hSSAO < sup > TG < /sup > in mice and human
In this study, 42 hemorrhagic patients with hypertension and hyperlipidemia and 42 age-matched healthy controls were enrolled. The contents of serum semicarbazide-sensitive amine oxidase (SSAO) and formic acid (FC, FC is a final product of SSAO through the oxidation of endogenous formaldehyde, which results from the enzymatic oxidative deamination of the SSAO substrate, methylamine) were examined in the patients after stroke. Hemorrhagic areas were quantified by computer tomography. In the animal study, hemorrhagic degree was assessed by hemotoxylin & eosin or tissue hemoglobin kits. The relationship between FC and blo...
Source: Experimental Neurology - August 21, 2022 Category: Neurology Authors: Ya-Lan Di Yan Yu Sheng-Jie Zhao Nayan Huang Xue-Chao Fei Dan-Dan Yao Li Ai Ji-Hui Lyu Rong-Qiao He Jian-Jun Li Zhi-Qian Tong Source Type: research

Knockdown of NRSF Alleviates Ischemic Brain Injury and Microvasculature Defects in Diabetic MCAO Mice
Diabetes is one of the well-established risk factors of stroke and is associated with a poor outcome in patients with stroke. Previous studies have shown that the expression of neuron restrictive silencer factor (NRSF) is elevated in diabetes as well as ischemic stroke. However, the role of NRSF in regulating an outcome of diabetic ischemic stroke has not been completely understood. Here, we hypothesized that diabetes-induced NRSF elevation can aggravate brain injury and cognition impairment in ischemic stroke. The diabetic ischemic stroke mice model was established by 8 weeks of high-fat-diet feeding and 5 days of strepto...
Source: Frontiers in Neurology - May 13, 2022 Category: Neurology Source Type: research

A Sharp Decline in Burden of Stroke in Rural China During COVID-19 Pandemic
This study aimed to explore trends in the burden from stroke associated with home quarantine during the COVID-19 pandemic. Patients with a first-ever stroke registered between January 1 and April 20 from 2010 to 2020 were included in this study. We compared the incidence and the rates of mortality, hospitalization, and diagnosis by neuroimaging for first-ever stroke among a low-income population in rural China during the study periods. Overall, 377 first-ever stroke patients were analyzed in this study period; men accounted for 59.2%. Compared with 2019, the incidence of first-ever stroke was 73.5% lower in 2020 (P < 0....
Source: Frontiers in Neurology - January 25, 2021 Category: Neurology Source Type: research

Exosomes derived from bone marrow mesenchymal stem cells harvested from type two diabetes rats promotes neurorestorative effects after stroke in type two diabetes rats.
CONCLUSIONS: T2DM-MSC-Exo treatment for stroke in T2DM rats promotes neurorestorative effects and improves functional outcome. Down regulation of miR-9 expression and increasing its target ABCA1 pathway may contribute partially to T2DM-MSC-Exo treatment induced white matter remodeling and anti-inflammatory responses. PMID: 32889008 [PubMed - as supplied by publisher]
Source: Experimental Neurology - August 31, 2020 Category: Neurology Authors: Venkat P, Zacharek A, Landschoot-Ward J, Wang F, Culmone L, Chen Z, Chopp M, Chen J Tags: Exp Neurol Source Type: research

Deferoxamine Treatment Prevents Post-Stroke Vasoregression and Neurovascular Unit Remodeling Leading to Improved Functional Outcomes in Type 2 Male Diabetic Rats: Role of Endothelial Ferroptosis
This study aimed to determine the impact of iron chelation with deferoxamine (DFX) on (1) cerebral vascularization patterns and (2) functional outcomes after stroke in control and diabetic rats. After 8  weeks of type 2 diabetes induced by a combination of high-fat diet and low-dose streptozotocin, male control and diabetic animals were subjected to thromboembolic middle cerebral artery occlusion (MCAO) and randomized to vehicle, DFX, or tPA/DFX and followed for 14 days with behavioral tests. Vas cular indices (vascular volume and surface area), neurovascular remodeling (AQP4 polarity), and microglia activation were meas...
Source: Translational Stroke Research - August 31, 2020 Category: Neurology Source Type: research

Obesity Drives Delayed Infarct Expansion, Inflammation, and Distinct Gene Networks in a Mouse Stroke Model
AbstractObesity is associated with chronic peripheral inflammation, is a risk factor for stroke, and causes increased infarct sizes. To characterize how obesity increases infarct size, we fed a high-fat diet to wild-type C57BL/6J mice for either 6  weeks or 15 weeks and then induced distal middle cerebral artery strokes. We found that infarct expansion happened late after stroke. There were no differences in cortical neuroinflammation (astrogliosis, microgliosis, or pro-inflammatory cytokines) either prior to or 10 h after stroke, and also no differences in stroke size at 10 h. However, by 3 days after stroke, animals...
Source: Translational Stroke Research - June 24, 2020 Category: Neurology Source Type: research

Delayed Administration of Angiotensin II Type 2 Receptor (AT2R) Agonist Compound 21 Prevents the Development of Post-stroke Cognitive Impairment in Diabetes Through the Modulation of Microglia Polarization
AbstractA disabling consequence of stroke is cognitive impairment, occurring in 12% –48% of patients, for which there is no therapy. A critical barrier is the lack of understanding of how post-stroke cognitive impairment (PSCI) develops. While 70% of stroke victims present with comorbid diseases such as diabetes and hypertension, the limited use of comorbid disease models in prec linical research further contributes to this lack of progress. To this end, we used a translational model of diabetes to study the development of PSCI. In addition, we evaluated the application of compound 21 (C21), an angiotensin II Type 2 rece...
Source: Translational Stroke Research - December 2, 2019 Category: Neurology Source Type: research

Smooth muscle cell-specific knockout of FBW7 exacerbates intracranial atherosclerotic stenosis.
Abstract Intracranial atherosclerotic stenosis (ICAS), the most common cause of stroke worldwide, is associated with high risk of recurrent ischemic stroke. F-box and WD repeat domain containing protein 7 (FBW7), an ubiquitin E3 ligase, is recently suggested to be involved in atherogenesis. However, whether FBW7 affects cerebrovascular remodeling during ICAS remains unknowns. We found that the expression of FBW7 was decreased in mouse brain microvessels from high-fat diet (HFD)-fed atherosclerotic mice. The reduced FBW7 expression was negatively associated with the remodeling of middle cerebral artery (MCA). Speci...
Source: Neurobiology of Disease - August 20, 2019 Category: Neurology Authors: Shen Y, Chen X, Chi C, Wang H, Xue J, Su D, Wang H, Li M, Liu B, Dong Q Tags: Neurobiol Dis Source Type: research

Mild hypothermia alleviates diabetes aggravated cerebral ischemic injury via activating autophagy and inhibiting pyroptosis.
In conclusion, mild hypothermia alleviated diabetes aggravated cerebral ischemic injury via activating autophagy and inhibiting pyroptosis. PMID: 31082455 [PubMed - as supplied by publisher]
Source: Brain Research Bulletin - May 9, 2019 Category: Neurology Authors: Tu Y, Guo C, Song F, Huo Y, Geng Y, Guo M, Bao H, Wu X, Fan W Tags: Brain Res Bull Source Type: research

Cell-Based Therapies for Stroke: Promising Solution or Dead End? Mesenchymal Stem Cells and Comorbidities in Preclinical Stroke Research
Conclusion The high prevalence of comorbidities in patients with stroke indicates the need for therapies in preclinical studies that take into account these comorbidities in order to avoid failures in translation to the patient. Preclinical studies are beginning to evaluate the efficacy of MSC treatment in stroke associated with comorbidities, especially hypertension, for ischemic and hemorrhagic stroke. Regarding aging and diabetes, only ischemic stroke studies have been performed. For the moment, few studies have been performed and contradictory results are being reported. These contradictory results may be due to the u...
Source: Frontiers in Neurology - April 8, 2019 Category: Neurology Source Type: research

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