Publications by authors named "Andre Monteiro"

Article Synopsis
  • - Prostate cancer (PCa) risk is significantly influenced by genetic factors, and numerous Genome-Wide Association Studies (GWAS) have aimed to understand these genetic associations; however, many of these studies produce false-positive results.
  • - Researchers applied Bayesian statistical methods to GWAS data to improve the accuracy of genetic associations with PCa, focusing on significant genetic polymorphisms and their correlations with the disease.
  • - Their analysis included 13 GWAS studies, identifying multiple gene variations as potential biomarkers for PCa risk, particularly noting variations in the 8q24 locus and specific genes like MSMB, ITGA6, and KLK3.
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Objectives: Moyamoya disease (MMD) is a cerebrovascular disorder marked by the progressive steno-occlusion of the bilateral internal carotid arteries and the formation of abnormal collateral vessel networks at the base of the brain. Previous studies have attempted to identify risk factors predictive of postoperative complications to improve patient management. This study aims to identify pretreatment factors associated with post-bypass symptomatic strokes in MMD patients.

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One of the biggest challenges in studying vitrification protocols for small volumes of biological materials, especially the microdroplet vitrification protocol, is measuring the solidification rate, requiring equipment with a high level of technology, making it practically impossible to measure the degree of crystallization. An alternative is using mathematical models applied in computer simulations (CFD), helping to improve and develop new vitrification protocols. This study investigates the vitrification process utilizing the microdroplet method through experimental and numerical analysis.

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Background And Objectives: Moyamoya disease (MMD) is characterized by progressive steno-occlusion of the internal carotid arteries, leading to compensatory collateral vessel formation. The optimal surgical approach for MMD remains debated, with bilateral revascularization potentially offering more comprehensive protection but involving more extensive surgery compared to unilateral revascularization. This study aims to compare bilateral revascularization and unilateral revascularization short-term safety profile in the treatment of MMD.

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Article Synopsis
  • - Moyamoya disease (MMD) is a rare brain disorder that causes narrowing of blood vessels, often accompanied by high blood pressure, which complicates the condition's outcomes; this study compares MMD patients with and without hypertension.
  • - A total of 598 MMD patients were analyzed from multiple institutions, with hypertensive (292) and non-hypertensive (306) groups evaluated for clinical characteristics and outcomes using statistical adjustments to account for differences in their backgrounds.
  • - Results indicated that although hypertensive patients showed higher rates of certain risk factors (like diabetes and smoking) and higher stroke rates before adjustments, post-matching analysis revealed no significant differences in stroke rates or recovery outcomes between the two groups, suggesting effective
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Article Synopsis
  • The renin-angiotensin system (RAS) is essential for cardiovascular health, with key peptides like angiotensin-II and angiotensin-(1-7) playing major roles.
  • Recent research shows that alamandine (ALA) interacts with heart cells (cardiomyocytes) and influences their contraction based on the time of day, showing positive effects during the light phase and negative during the dark phase.
  • These results indicate that the effects of ALA through the MrgD receptor vary with circadian rhythms, suggesting new avenues for timing-based therapies to treat heart conditions linked to disrupted biological clocks.
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  • The study investigates the impact of decompressive craniectomy (DC) on patients with symptomatic intracerebral hemorrhage (sICH) following acute ischemic stroke, comparing outcomes between those who had surgery and those treated medically.
  • It analyzed data from 85 patients across 8 stroke centers, revealing that DC patients were younger, had longer ICU stays, and showed better functional outcomes at 90 days compared to non-DC patients, especially if they were younger and did not have a history of cancer.
  • The results indicate that the DC group had lower in-hospital mortality rates and came out with improved scores on the modified Rankin Scale, suggesting a potential benefit of surgery for select patients with severe sICH.
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Article Synopsis
  • * Researchers conducted a review of procedures performed at their center from 2004 to 2022, involving 55 pediatric patients who had various vascular conditions, such as aneurysms and arteriovenous malformations.
  • * Results showed a low rate of complications, with only 1.7% experiencing access-site issues and a 1.8% rate of treatment-related mortality, suggesting that neurointerventions can be safely carried out in pediatric patients.
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Article Synopsis
  • The study investigates the effectiveness of two anesthesia methods—general anesthesia (GA) and conscious sedation (non-GA)—for patients undergoing endovascular treatment for isolated posterior cerebral artery (PCA) occlusion stroke.
  • Researchers analyzed data from the PLATO study focusing on patient outcomes such as the modified Rankin Scale scores after 90 days, as well as successful reperfusion rates and safety measures like intracranial hemorrhage.
  • Results show that while both anesthesia methods had similar functional outcomes and safety profiles, GA was associated with significantly higher rates of successful reperfusion during treatment.
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Article Synopsis
  • Posterior cerebral artery occlusion (PCAo) can lead to long-term disabilities, and this study compares the effectiveness of endovascular thrombectomy (EVT), both with and without intravenous thrombolysis (IVT), against IVT alone for treating PCAo.
  • The study analyzed data from 724 patients treated within 24 hours of PCAo onset, measuring outcomes like functional independence and early neurological improvement over a three-month period.
  • Results indicated that EVT did not improve overall functional outcomes compared to IVT alone; however, it increased the likelihood of early improvement, but also raised risks of symptomatic intracranial hemorrhage and mortality.
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Article Synopsis
  • A study was conducted to investigate the effects of different anesthesia types (general vs. non-general) during endovascular treatment for strokes caused by distal medium vessel occlusions (DMVO).
  • Researchers analyzed data from multiple centers and focused on outcomes like disability after 90 days, successful blood vessel reperfusion, and rates of complications.
  • Results showed no significant differences between the two anesthesia groups regarding disability, successful treatment, or safety measures, suggesting that anesthesia type may not impact clinical outcomes in DMVO strokes.
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Article Synopsis
  • The study investigates the effectiveness of endovascular treatment (EVT) versus medical management (MM) in patients with isolated posterior cerebral artery occlusion (iPCAO) during acute ischemic strokes, lacking prior randomized trial evidence.
  • Results show that EVT leads to better functional outcomes for patients with more severe stroke symptoms (NIHSS >6), but not for those with milder symptoms (NIHSS ≤6).
  • Additionally, while EVT improves outcomes, it is also linked to a higher occurrence of symptomatic intracranial hemorrhages, regardless of initial stroke severity.
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Objective: Aneurysmal subarachnoid hemorrhage (aSAH) is associated with high mortality rates. There is a significant gap in the literature describing global disparities in demographics, management, and outcomes among patients with aSAH. We aimed to conduct a systematic review and meta-analysis to assess global disparities in aSAH presentation and management.

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Lupins ( spp.) are legumes with high relevance for the sustainability of agricultural systems as they improve the soil quality, namely, through the fixation of atmospheric nitrogen, and have good adaptability to different climates and soil conditions. Besides, they possess high nutritive value, especially due to the high protein content of the seeds.

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The identification of crops that simultaneously contribute to the global protein supply and mitigate the effects of climate change is an urgent matter. Lupins are well adapted to nutrient-poor or contaminated soils, tolerate various abiotic stresses, and present relevant traits for acting as ecosystem engineers. Lupins are best studied for their seeds, but their full foraging potential needs further evaluation.

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Background: Intracranial dural arteriovenous fistulas (dAVFs) are abnormal connections between arteries and veins within the dura mater. Various treatment modalities, such as surgical ligation, endovascular intervention, and radiosurgery, aim to close the fistulous connection. Although transvenous embolization (TVE) is the preferred method for carotid-cavernous fistulas, its description and outcomes for noncavernous dAVFs vary.

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Objective: Medulloblastoma is the most common malignant intracranial tumor affecting the pediatric population. Despite advancements in multimodal treatment over the past 2 decades yielding a 5-year survival rate > 75%, children who survive often have substantial neurological and cognitive sequelae. The authors aimed to identify risk factors and develop a clinically friendly online calculator for prognostic estimation in pediatric patients with medulloblastoma.

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Background: The anterior communicating artery (AComm) region is the most common site of intracranial aneurysms, with increased rupture risk compared with other locations. Overall, flow diverters present as a safe and efficacious treatment for intracranial aneurysms, but there is paucity of data for their use in the treatment of unruptured AComm aneurysms. We present the largest multicentric analysis evaluating the outcomes of flow diverters in AComm aneurysm treatment.

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Background And Objectives: Although venous sinus stenting (VSS) improves cerebrospinal fluid reabsorption and decreases intracranial pressure in patients with idiopathic intracranial hypertension (IIH), the underlying pathophysiology of IIH is not well understood. We present a review and meta-analysis of the literature on VSS for IIH treatment, focusing on the rates of restenosis and symptom recurrence.

Methods: We performed a systematic review of PubMed and Embase databases between January 1, 2011, and December 31, 2021.

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Background And Objective: Flow diverter (FD) treatment for aneurysms of the ophthalmic segment of the internal carotid artery (ICA) may raise concerns about visual morbidity related to coverage of the ophthalmic artery by the device. Our objective was to evaluate clinical and angiographic outcomes associated with FD treatment of these aneurysms, with particular emphasis on visual morbidity.

Methods: We performed a retrospective analysis of the endovascular databases at 2 US centers to identify consecutive patients with aneurysms along the ophthalmic segment of the ICA that were treated with FDs between January 2010 and December 2022.

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Article Synopsis
  • The fall armyworm is a significant pest threatening global food production, with resistance to current control methods, necessitating new strategies.
  • Essential oils, particularly from Amazonian plants, show promise as insecticides, with their effectiveness enhanced by combining different compounds.
  • Dillapiole was identified as the most potent compound, showing strong synergistic effects when mixed with others, while some mixtures displayed antagonism, highlighting the need for careful formulation in pest control.
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Background: Moyamoya is a chronic occlusive cerebrovascular disease of unknown etiology causing neovascularization of the lenticulostriate collaterals at the base of the brain. Although revascularization surgery is the most effective treatment for moyamoya, there is still no consensus on the best surgical treatment modality as different studies provide different outcomes.

Objective: In this large case series, we compare the outcomes of direct (DR) and indirect revascularisation (IR) and compare our results to the literature in order to reflect on the best revascularization modality for moyamoya.

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Background: Cryopreservation of bone flaps after decompressive craniectomies is a common practice. A frequent complication after bone flap reimplantation is postoperative infection, so culturing of frozen craniectomy bone flaps is a crucial practice that can prevent patient morbidity and mortality. Although many studies report on infection rates after cranioplasty, no study reports on the results of bone flaps stored in a cryopreservation freezer, reimplanted or otherwise.

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