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1.
Neurosurg Rev ; 47(1): 664, 2024 Sep 23.
Artículo en Inglés | MEDLINE | ID: mdl-39312085

RESUMEN

Cerebral Proliferative Angiopathy (CPA) is a rare brain vascular malformation, similar to Arteriovenous Malformations (AVM) but lacking of early venous drainage. Presentation and treatment outcomes were investigated, examining for morbidity, mortality and complications. A meta-analysis was conducted according to PRISMA guidelines. PubMed, Embase and Web Of Science were searched with keywords such as "cerebral proliferative angiopathy" and "management". We pooled and meta-analyzed outcomes on documented CPA cases. 11,079 studies were pooled as a result of manual citation searching, 50 studies were included, adding up to 115 CPA cases. The majority of patients were females (1.38:1), with a mean age of presentation of 26.9 (19.4) years. Headache (46%) and seizures (34%) were the most common presenting symptoms. 37% of patients presented with focal neurologic deficit. Patients managed conservatively from the surgical standpoint (i.e. nonoperative management) did not undergo homogenous treatment strategies, and major complications were at 47% (95% CI: 17%, 76%), with a 1% mortality (95% CI: 0%, 6%). Surgical and embolization interventions presented the highest proportion of major complications, 66% (95% CI: 33%, 99%) and 73% (95% CI: 42%, 100%), respectively. The embolization subgroup led in mortality, with 3% (95% CI: 0%, 10%). No death was documented in patients undergoing surgery. CPA has a similar presentation to brain arteriovenous malformations, but its treatment outcomes are potentially worse. This difference is not attributable to heterogeneity in assigning patient treatment strategies. This highlights the need for more accurate diagnostic methods.


Asunto(s)
Malformaciones Arteriovenosas Intracraneales , Femenino , Humanos , Embolización Terapéutica/métodos , Malformaciones Arteriovenosas Intracraneales/terapia , Procedimientos Neuroquirúrgicos/métodos , Resultado del Tratamiento
2.
Neurosurg Rev ; 47(1): 393, 2024 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-39090364

RESUMEN

Spontaneous intracerebral hemorrhage (ICH) represents a critical and potentially devastating medical event resulting from the rupture of intracerebral vessels. Patients afflicted with ICH face an increased risk of venous thromboembolism (VTE) due to factors such as immobility. However, determining the ideal timing for initiating venous thromboembolism thromboprophylaxis (TP) remains uncertain, as it may carry the potential risk of exacerbating hematoma expansion. Thus, our objective was to ascertain the optimal timing for initiating TP following ICH through a comprehensive systematic review and meta-analysis.This systematic review and meta-analysis were performed following the Cochrane Collaboration and the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) statement guidelines, considering outcomes based on the time of intervention: Ultra early (UEPT) < 24 h, Early (EPT) < 48 h, Late (LPT) > 48 h to perform an analysis on hematoma expansion and mortality.Of 2.777 Hematoma expansion was not more frequent in the 440 patients receiving UEPT/EPT (n = 440) versus 565 receiving LPT (Odds ratio (OR) 0.94 (95% CI; 0.62 to 1.43; I2 = 0%)). Similarly, mortality was not lower in the 293 received UEPT or EPT versus 477 receiving LPT (OR 0.63 (95% CI; 0.39 to 1.0; I2 = 0%).This study, through a systematic review and meta-analysis, conclusively found no difference in intracranial hematoma expansion and/or increased mortality between the use of heparin in the early thromboprophylaxis (< 48 h) group compared to the late thromboprophylaxis (> 48 h) group. Implementing this approach in the management of spontaneous cerebral hemorrhage could facilitate progress towards more optimal care protocols.


Asunto(s)
Hemorragia Cerebral , Tromboembolia Venosa , Humanos , Hemorragia Cerebral/complicaciones , Tromboembolia Venosa/prevención & control , Anticoagulantes/uso terapéutico , Factores de Tiempo
3.
Artículo en Inglés | MEDLINE | ID: mdl-39078134

RESUMEN

BACKGROUND AND OBJECTIVE: Arteriovenous malformations (AVMs) are congenital lesions, and because of their structure, complexity, flow, size, and location organization, they are lesions that require extensive anatomic knowledge and mastery of microsurgical skills and techniques. Human placentas as a training model for AVM surgery are promising alternatives. This article aims to describe the technique for forming an AVM-type lesion in human placentas and its usefulness in the training of microsurgical treatment techniques. METHODS: In this study, 15 fresh human placental models were treated. A nidus was created using synthetic material, and dynamic flow was evaluated with intravascular injection of Indocyanine Green. The catheter system was connected to a continuous flow infusion pump. For simulation purposes, 4 vascular neurosurgeons and 4 vascular neurosurgery fellows used the same techniques and instruments used in real surgery to simulate the resection of AVM lesions. Subjective assessments were conducted, evaluating the validity and structured content on a 5-point Likert scale. Evaluation criteria included the execution of technical maneuvers and the model's expression and structural aspects. RESULTS: We describe the step-by-step creation of an AVM in a placental biological model for the performance of vascular microsurgery training in the laboratory. We created in the human placenta a lesion with the characteristics of an AVM for microsurgical training in the laboratory, which presents key features realistic to a real AVM, such as 1 or more feeder arteries, nidus (synthetic), draining vein(s), continuous and pulsatile flow, and 3-dimensional configuration. Furthermore, it demonstrates the applicability of microsurgical techniques to the model compared with performing surgery on a patient. CONCLUSION: Considering it an effective method for laboratory training, the creation of arteriovenous malformations in human placentas enables students to replicate, comprehend the structure, and master microsurgical techniques in a realistic model.

4.
Artículo en Inglés | MEDLINE | ID: mdl-38967444

RESUMEN

Cavernous angioma is a sinusoidal dilatation covered by a single layer of endothelium, separated by a collagen matrix with elastin and smooth muscle.1 The prevalence in the general population is estimated at 0.4% to 0.9%,2 representing around 5% to 10% of all vascular malformations.3 Studies indicate 9% to 35% of cavernomas are found in deep locations such as the brainstem, thalamus, and basal ganglia.4-6 Common symptoms of these deep lesions are cranial nerve deficit, hemiparesis, and paresthesia. These lesions have high rates of rebleeding after the first episode of bleeding but present excellent results of surgical resection and modified Rankin in the long term.7-13 Internal capsule cavernomas are particularly challenging due to the important projection fibers surround them. Although the gold standard of treatment is microsurgery, there needs to be a consensus on the best approach for lesions of this topography. We present a video case of a female in her 50s with right hemiparesis and dysphasia, exhibiting grade 3/5 strength on the right side. T1 MRI revealed a high intensity, heterogeneous, multinodular signal in the left basal ganglia, with tractography showing the lesion dividing the posterior limb of the internal capsule amid fibers of the right corticospinal tract. The patient consented to the procedure and to the publication of his/her image. This study was approved by the Ethics and Research Committee of our institution. We demonstrated that the superior frontal sulcus is a safe corridor to surgically cure cavernomas of the internal capsule, with the recovery of previous deficits.

5.
Front Neurol ; 15: 1355338, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38751883

RESUMEN

Introduction: Deep cavernomas of eloquent areas, located in the region of the basal nuclei and thalamus, account for 9 to 36% of these encephalic vascular malformations. Internal capsule cavernomas are particularly challenging, as they are surrounded by important projection fibers and their manipulation can lead to permanent deficits. To demonstrate through surgical cases that cavernomas of the internal capsule can be approached by frontal craniotomy, via the superior frontal sulcus, in a curative manner and with low morbidity. Methods: We presented two cases of cavernomas of the internal capsule operated, whose treatment was microsurgical resection via frontal craniotomy and access to the lesion via the superior frontal sulcus, described step-by-step. To elucidate the rationale behind the decision, we used preoperative images with an emphasis on the patients' tractography and the importance of comparing these images with anatomical specimens dissected in the neuroanatomy and microsurgery laboratory. Results: The two cases of internal capsule cavernomas, one in the anterior limb and the other in the posterior limb, were treated surgically via the superior frontal sulcus. Discussion: Both patients showed radiological cure and clinical improvement in the post-operative segment. The patient consented to the procedure and to the publication of his/her image. Treatment of internal capsule cavernomas via the superior frontal sulcus has proven to be a safe and effective option.

6.
Curr Microbiol ; 81(6): 144, 2024 Apr 17.
Artículo en Inglés | MEDLINE | ID: mdl-38630311

RESUMEN

A group of Gram-negative plant-associated diazotrophic bacteria belonging to the genus Nitrospirillum was investigated, including both previously characterized and newly isolated strains from diverse regions and biomes, predominantly in Brazil. Phylogenetic analysis of 16S rRNA and recA genes revealed the formation of a distinct clade consisting of thirteen strains, separate from the formally recognized species N. amazonense (the closest species) and N. iridis. Comprehensive taxonomic analyses using the whole genomes of four strains (BR 11140T = AM 18T = Y-2T = DSM 2788T = ATCC 35120T, BR 11142T = AM 14T = Y-1T = DSM 2787T = ATCC 35119T, BR 11145 = CBAmC, and BR 12005) supported the division of these strains into two species: N. amazonense (BR 11142 T and BR 12005) and a newly proposed species (BR 11140 T and BR 11145), distinct from N. iridis. The phylogenomic analysis further confirmed the presence of the new Nitrospirillum species. Additionally, MALDI-TOF MS analysis of whole-cell mass spectra provided further evidence for the differentiation of the proposed Nitrospirillum species, separate from N. amazonense. Analysis of chemotaxonomy markers (i.e., genes involved in fatty acid synthesis, metabolism and elongation, phospholipid synthesis, and quinone synthesis) revealed that the new species highlights high similarity and evolutionary convergence with other Nitrospirillum species. This new species exhibited nitrogen fixation ability in vitro, it has similar NifHDK protein phylogeny position with the closest species, lacked denitrification capability, but possessed the nosZ gene, enabling N2O reduction, distinguishing it from the closest species. Despite being isolated from diverse geographic regions, soil types, and ecological niches, no significant phenotypic or physiological differences were observed between the proposed new species and N. amazonense. Based on these findings, a new species, Nitrospirillum viridazoti sp. nov., was classified, with the strain BR 11140T (DSM 2788T, ATCC 35120T) designated as the type strain.


Asunto(s)
Nitrógeno , Poaceae , Filogenia , ARN Ribosómico 16S/genética , Espectrometría de Masa por Láser de Matriz Asistida de Ionización Desorción
7.
J Esthet Restor Dent ; 36(7): 1056-1067, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38581272

RESUMEN

OBJECTIVE: To evaluate the effect of fluoride consistency and composition to protect enamel and dentin against the dental erosion. MATERIALS AND METHODS: Bovine enamel and dentin specimens were treated with artificial saliva, neutral fluoride gel (NFG), acidulated phosphate fluoride gel (AFG), neutral fluoride foam (NFF), and acidulated phosphate fluoride foam. The samples were subjected to cycling. Micro energy-dispersive X-ray fluorescence spectrometry, surface roughness (Ra), contact angle (CA), and scanning electron microscopy (SEM) were performed. Composition, CA and Ra data were analyzed by ANOVA and multiple comparison test (p < 0.05). RESULTS: The dentin protected had a significantly higher mineral content than in the control. Eroded unprotected enamel had higher Ra values than normal surfaces. Fluoride treatments increased the Ra in dentin samples. AFG increased the CA in enamel. Fluoride foams increased CA in dentin with reduced mineral loss. SEM analysis found a deposited layer on enamel treated with AFG and remnants of deposits on dentin treated with NFG and NFF. CONCLUSION: Regardless of the form of application, fluoride provided protection against erosion, however with different levels. CLINICAL SIGNIFICANCE: Applying the adequate fluoride form is relevant since the formulations have different effects on both enamel and dentin.


Asunto(s)
Esmalte Dental , Dentina , Fluoruros , Microscopía Electrónica de Rastreo , Espectrometría por Rayos X , Propiedades de Superficie , Erosión de los Dientes , Animales , Erosión de los Dientes/prevención & control , Bovinos , Esmalte Dental/efectos de los fármacos , Dentina/efectos de los fármacos , Fluoruros/farmacología , Fluoruro de Fosfato Acidulado/farmacología , Saliva Artificial , Fluoruros Tópicos/farmacología
8.
World Neurosurg ; 185: 72-73, 2024 05.
Artículo en Inglés | MEDLINE | ID: mdl-38342174

RESUMEN

Cavernous malformations (CMs) account for 10%-15% of all vascular malformations and represent the second most common type of cerebral vascular lesion.1 They typically occur in the cerebral subcortex or white matter.2 CMs located in the thalamus are rare.3 When we isolate the group of thalamic CMs, we find a bleeding risk of >5% per year, with a rebleeding rate exceeding 60%, often occurring within 1 year of the initial bleeding.1 The deep location and proximity to eloquent brain regions make thalamic CMs challenging for neurosurgeons.4,5 Surgeons can access the posterolateral thalamus through various surgical approaches, such as transcallosal transventricular, supracerebellar transtentorial, intraparietal sulcus, and transcortical methods. Selecting the best surgical approach requires considerable expertise, considering the patient's preoperative condition and the lesion's location.6-12 We discuss a complex case involving a 24-year-old patient with a right thalamic cavernoma and a history of 3 prior bleeding events. We present a step-by-step transcortical approach through the posterior portion of the superior temporal gyrus (Video 1). The patient consented to the procedure and publication of images. We demonstrate how the transtemporal posterior trajectory provides an optimal working corridor for safely removing this cavernous malformation without introducing new deficits.


Asunto(s)
Hemangioma Cavernoso del Sistema Nervioso Central , Procedimientos Neuroquirúrgicos , Tálamo , Humanos , Hemangioma Cavernoso del Sistema Nervioso Central/cirugía , Hemangioma Cavernoso del Sistema Nervioso Central/diagnóstico por imagen , Tálamo/cirugía , Tálamo/diagnóstico por imagen , Procedimientos Neuroquirúrgicos/métodos , Adulto Joven
9.
Oper Neurosurg (Hagerstown) ; 26(1): 64-70, 2024 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-37811923

RESUMEN

BACKGROUND AND OBJECTIVES: Transorbital ventricular puncture is a minimally invasive described procedure with poor landmarks and anatomic references. This approach can be easily performed to save patients with intracranial hypertension, especially when it is secondary to an acute decompensated hydrocephalus. This study aims to describe anatomic structures and landmarks to facilitate the execution of transorbital puncture in emergency cases. METHODS: We analyzed 120 head computed tomographies to show the best area to perform the procedure in the orbital roof. Two adult cadavers (4 sides) were punctured in the predetermined area. Angles, distances, landmarks, and anatomic structures were registered. This approach to the ventricular system may be performed at bedside to relieve intracranial hypertension only in specific cases. RESULTS: The perforation point is 2.5 cm (female) or 3.0 cm (male) lateral to the midline and immediately inferior to the superciliary arch. A vertical line, parallel to midline, was drawn on the outer edge of the patient's forehead, the needle was 45° inferiorly and 20° medially and then progressed 2.0 cm backwards to reach the bone perforation point. After that, it was advanced another 4.5cm approximately until it reached the anterior horn of the lateral ventricle. CONCLUSION: Based on statistical and experimental evidences, we were able to establish reliable anatomic reference points to access the anterior horn of the lateral ventricle through transorbital puncture.


Asunto(s)
Cabeza , Hipertensión Intracraneal , Adulto , Humanos , Masculino , Femenino , Ventrículos Cerebrales/diagnóstico por imagen , Ventrículos Cerebrales/cirugía , Tomografía Computarizada por Rayos X , Punciones
10.
World Neurosurg ; 182: e471-e477, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38036172

RESUMEN

BACKGROUND: Neurosurgical training continuously seeks innovative methods to enhance the acquisition of essential technical skills for neurosurgeons worldwide. While various training models have been employed, few truly replicate real-life conditions optimally. Human placenta is a good model for neurosurgical microsurgery training due to its anatomic similarities to neurovascular structures. Placental vessels exhibit a branching pattern and caliber comparable with intracranial vessels, making them suitable for practicing microsurgical techniques. The study aims to delineate the anatomic zones of the placenta and propose a segmented training model, resulting in a reproducible, cost-effective, and realistic neurosurgical microsurgery training environment. METHODS: Twenty human placentas were meticulously prepared, injected with dyes, and categorized into zones on the basis of anatomic features. Measurements of placental vessels were recorded and compared with cerebral vessels. The placenta was divided into 4 quadrants to facilitate specific training techniques. RESULTS: Our results revealed varying vessel diameters across placental zones, closely resembling cerebral vessels. Different microsurgical techniques were applied to specific placental zones, thereby optimizing training scenarios. The applicability section described exercises such as membrane dissection, vessel skeletonization, aneurysm creation, vascular bypass, and tumor dissection within the placental model, providing detailed guidance on the zones suitable for each exercise. CONCLUSIONS: Human placenta serves as an effective microsurgical training model for neurosurgery, enhancing neurosurgeons' skills through anatomic segmentation. Integrating this model into training programs can significantly contribute to skill acquisition and improved surgical outcomes. Further research is warranted to refine and expand its utilization, complemented by clinical experiences and other simulation tools.


Asunto(s)
Neurocirugia , Placenta , Humanos , Embarazo , Femenino , Placenta/irrigación sanguínea , Modelos Anatómicos , Microcirugia/métodos , Neurocirugia/educación , Procedimientos Neuroquirúrgicos/métodos , Competencia Clínica
11.
Bol. latinoam. Caribe plantas med. aromát ; 22(1): 130-144, ene. 2023. tab, graf
Artículo en Inglés | LILACS | ID: biblio-1555351

RESUMEN

In this study, we investigated the influence of mixture design on the chemical profile of Eugenia unifloraleaves, evaluating the antioxidant and antimicrobial activities, the toxic and hemolytic potential, with the focus on the improvement of the polyphenol's extraction for incorporation of the extract in semi-solid forms with antifungal action. The chemical analysis was evaluated by UV-Vis and HPLC. The antimicrobial, antioxidant, and hemolytic activities were monitored. The flavonoid content ranged from 2.63-7.98 %w/w and tannins from 5.42-18.29 %w/w. The extract consisted of gallic acid (0.09-1.29%; w/w), ellagic acid (0.09-0.37%; w/w), and myricitrin (0.18-1.20%; w/w). The most successful solvent system with the highest level of active extract was water: ethanol: propylene glycol. The extracts showed fungicidal properties (3.9 µg/mL), high antioxidant activity (IC50: 9.50 µg/mL), and low toxicity. These solvent mixtures can improve the in vitro bioactivities when compared to pure solvents and this result demonstrates the importance of mixture designs as useful tools for creating high-quality herbal products and elucidate the potential of E. uniflora glycolic extracts as active herbal pharmaceutical ingredients in topical delivery systems.


En este estudio investigamos la influencia del diseño de mezclas en el perfil químico de hojas de Eugenia uniflora, evaluando las actividades antioxidantes y antimicrobianas, el potencial tóxico y hemolítico, con el foco en la mejora de la extracción de polifenoles para la incorporación del extracto en formas semi-sólidas con acción antifúngica. El análisis químico se evaluó mediante UV-Vis y HPLC. Se monitorizaron las actividades antimicrobianas, antioxidantes y hemolíticas. El contenido de flavonoides osciló entre 2,63 y 7,98% p/p and taninos de 5,42-18,29% p/p. El extracto consistió en ácido gálico (0.09-1.29%; p/p), ácido elágico (0.09-0.37%; p/p) y miricitrina (0.18-1.20%; p/p). El sistema de disolventes más exitoso con el nivel más alto de extracto activo fue agua: etanol: propilenglicol. Los extractos mostraron propiedades fungicidas (3.9 µg/mL), alta actividad antioxidante (IC50: 9.50 µg/mL) y baja toxicidad. Estas mezclas de disolventes pueden mejorar las bioactividades in vitro en comparación con los disolventes puros y este resultado demuestra la importancia de los diseños de mezclas como herramientas útiles para crear productos a base de hierbas de alta calidad y dilucidar el potencial de los extractos glicólicos de E. uniflora como ingredientes farmacéuticos a base de hierbas en sistemas de entrega activos.


Asunto(s)
Extractos Vegetales/química , Eugenia/química , Antiinfecciosos/química , Espectrofotometría/métodos , Taninos/análisis , Bacterias/efectos de los fármacos , Flavonoides/análisis , Extractos Vegetales/farmacología , Pruebas de Sensibilidad Microbiana , Análisis de Varianza , Cromatografía Líquida de Alta Presión , Hemolíticos , Fitoquímicos , Hongos/efectos de los fármacos , Antiinfecciosos/toxicidad , Antiinfecciosos/farmacología , Antioxidantes
12.
An Acad Bras Cienc ; 94(suppl 3): e20211311, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36477237

RESUMEN

Among the policies for the creation of protected areas, the "Park" category is the best known worldwide. In Brazil, the national parks are important areas for the conservation of biodiversity and for ecotourism, but twenty years after the enactment of the law that regulates the National System of Protected Areas, there is no clear scenario of the National Parks' current situation regarding the fulfillment of their legal objectives. Aiming to understand this scenario in the six main Brazilian biomes, we evaluated variables related to: level of land regularization, existence and updating of management plans, number of authorized scientific research studies, variation in the number of visitors, development of recreation activities, ecotourism, and existence of an Advisory Council. For all biomes, the results regarding the legal objectives' attainment are negative, mostly in terms of land regularization, with the worst results being found in the Caatinga biome < 2% of the area within parks regularized. We concluded that only in specific cases the legal objectives of these protected areas are being accomplished and, therefore, if we keep the pace and the implementation and management policies of the last 20 years, the outlook is pessimistic for the conservation of Brazilian biodiversity.


Asunto(s)
Parques Recreativos , Brasil
13.
Chem Biodivers ; 19(12): e202200586, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36383100

RESUMEN

In the current work, we describe the synthesis of 1,4-dihydropyridine (1,4-DHP) derivatives via Hantzsch multicomponent reaction and their evaluation as photosystem II (PSII) inhibitors through chlorophyll a fluorescence bioassay. Among all the compounds tested, 1,1'-(2,4,6-trimethyl-1,4-dihydropyridine-3,5-diyl)bis(ethan-1-one) (4b) showed best results, reducing the parameters performance index on absorption basis (PIabs ) and electron transport per reaction center by 61 % and 49 %, respectively, as compared to the control. These results indicate the inhibitory activity of PSII over the electron transport chain. Additionally, a molecular docking approach using the protein D1 (PDB code 4V82) was performed in order to assess the structure-activity relationship among the 1,4-DHP derivatives over the PSII, which revealed that both, size of the group at position 4 and the carbonyl groups at the dihydropyridine ring are important for the ligand's interaction, particularly for the hydrogen-bonding interaction with the residues His215, Ser264, and Phe265. Thus, the optimization of these molecular features is the aim of our research group to extend the knowledge of PSII electron chain inhibitors and the establishment of new potent bioactive molecular scaffolds.


Asunto(s)
Herbicidas , Herbicidas/farmacología , Herbicidas/química , Simulación del Acoplamiento Molecular , Clorofila A , Fotosíntesis , Complejo de Proteína del Fotosistema II , Clorofila/química
14.
World Neurosurg ; 161: 4, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-35093574

RESUMEN

Cerebral arteriovenous malformations (AVMs) are dynamic neurovascular disorders that occur mainly in young adults, presenting an annual risk of rupture of 2% - 4% per year.1 They can be asymptomatic, representing an incidental radiologic finding, or present with neurologic deficits according to their brain location, size, and presence or absence of bleeding.2,3 AVMs located in eloquent areas4 represent a great challenge for neurosurgeons, sometimes directed to alternatives therapies (e.g., embolization, radiotherapy) due to the difficulty in planning and surgical technique. Despite the complexity, we consider that there is benefit to removing these lesions; this can be done safely, as with the adequate microsurgical strategy and neuroanatomic knowledge. In Video 1, we show the case of a 55-year-old male patient with an AVM positioned over the right central sulcus. He presented with intermittent left-hand paresthesia followed by an episode of involuntary movements in the left arm without loss of consciousness and with spontaneous resolution. Angiography showed an AVM feed by branches of the middle cerebral artery and multiple venous drainage for the Trolard complex and superficial middle cerebral vein, with a 4-cm nidus, making it grade III in the Spetzler-Martin classification.4 The patient underwent surgery with total resection of the lesion without any complication or new neurologic deficits.


Asunto(s)
Embolización Terapéutica , Malformaciones Arteriovenosas Intracraneales , Humanos , Malformaciones Arteriovenosas Intracraneales/complicaciones , Malformaciones Arteriovenosas Intracraneales/diagnóstico por imagen , Malformaciones Arteriovenosas Intracraneales/cirugía , Masculino , Microcirugia/métodos , Persona de Mediana Edad , Procedimientos Neuroquirúrgicos , Resultado del Tratamiento , Adulto Joven
15.
Microsc Res Tech ; 85(3): 1089-1100, 2022 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-34741774

RESUMEN

The prevention and treatment of erosive tooth wear are becoming increasingly important due to its increasing prevalence. The use of natural solutions to modify dental surfaces has become an area of research. Organic materials such as chitosan and hydrolyzed collagen may be a promising option to treat dentin. This in vitro study aimed to evaluate the influence of chitosan or hydrolyzed collagen, alone or combined with acidulated phosphate fluoride (APF) gel, on the composition and morphology of dentin after erosion. Bovine dentin samples were prepared (n = 84) and treated with artificial saliva (AS, negative control); APF gel (F, positive control); chitosan solution (Chi); hydrolyzed collagen solution (Col); fluoride/chitosan composition (F_Chi); and fluoride/hydrolyzed collagen composition (F_Col). Erosive cycles (six cycles of immersion in orange juice for 1 min, followed by immersion in AS for 1 hr) were performed. The materials were characterized by their morphology, composition, and particle size distribution. Micro-energy dispersive X-ray fluorescence spectroscopy and scanning electron were used to evaluate the dentin's inorganic chemical composition and morphology. The F_Col and F groups had a reduction in calcium loss by 17 and 26%, respectively (p < .001). Both of these groups still had a covering layer of agglomerates at the dentin surface after the erosive cycles. The fluoridated chitosan or collagen solutions improved the dentin resistance to erosion as a novel hybrid-fluoride-based material approach to provide surface protection from erosion.


Asunto(s)
Quitosano , Erosión de los Dientes , Animales , Biomineralización , Bovinos , Quitosano/farmacología , Colágeno/análisis , Dentina/química , Fluoruros/farmacología , Erosión de los Dientes/tratamiento farmacológico , Erosión de los Dientes/prevención & control
16.
Photodiagnosis Photodyn Ther ; 37: 102643, 2022 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-34826638

RESUMEN

BACKGROUND AND AIM: Among the most common symptoms of COVID-19 is taste dysfunction, which has a ranging clinical presentation. As well as its pathophysiology remains to be unclear, there is not enough information about the efficacy and safety of the available treatments. This study aims to report a series of cases using PBMT for the management of COVID-19-related taste impairment. CASE SERIES: 8 female and 2 male patients sought medical help for taste impairment (either partially or completely) after COVID-19 infection. Photobiomodulation therapy (PBMT) on the tongue mucosa was then proposed but with 3 different protocols. Taste perception at baseline and before every laser session was evaluated using a visual analog scale. Irrespective of the PBMT protocol, taste recovery was noted in all cases but with varying degrees of improvement. CONCLUSION: given the high prevalence rates of taste dysfunction in COVID-19 patients and the lack of information about the available treatments, PBMT seems to be a promising therapeutic modality but not dependent on the total number of laser sessions and the interval between them. The choice of the most suitable laser protocol as well as the knowledge of the exact photonic mechanisms, however, need to be better studied.


Asunto(s)
COVID-19 , Terapia por Luz de Baja Intensidad , Fotoquimioterapia , Femenino , Humanos , Terapia por Luz de Baja Intensidad/métodos , Masculino , Fotoquimioterapia/métodos , SARS-CoV-2 , Trastornos del Gusto/etiología
17.
Photodiagnosis Photodyn Ther ; 36: 102574, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-34628071

RESUMEN

Olfactory dysfunction is commonly seen in COVID-19 patients; however, little is known about the pathophysiology and management. The present study aimed to report a series of cases in which three protocols of intranasal photobiomodulation therapy (PBMT) were used for COVID-19-related olfactory dysfunction. Irrespective of the PBMT protocol, olfaction recovery was noted in all cases but with varying degrees of improvement. Although intranasal PBMT seems to be a promising therapeutic modality, more research is needed to better define effectiveness.


Asunto(s)
COVID-19 , Terapia por Luz de Baja Intensidad , Trastornos del Olfato , Fotoquimioterapia , Humanos , Trastornos del Olfato/tratamiento farmacológico , Trastornos del Olfato/terapia , Fotoquimioterapia/métodos , Fármacos Fotosensibilizantes/uso terapéutico , SARS-CoV-2 , Olfato
18.
Braz J Microbiol ; 52(4): 2153-2168, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-34245449

RESUMEN

The neotropical genus Calliandra is of great importance to ecology and agroforestry, but little is known about its nodulation or its rhizobia. The nodulation of several species from two restricted diversity centres with native/endemic species (Eastern Brazil and North-Central America) and species widespread in South America, as well as their nodule structure and the molecular characterization of their rhizobial symbionts based on phylogeny of the 16S rRNA, recA and nodC gene, is reported herein. Species representative of different regions were grown in Brazilian soil, their nodulation observed, and their symbionts characterized. Calliandra nodules have anatomy that is typical of mimosoid nodules regardless of the microsymbiont type. The rhizobial symbionts differed according to the geographical origin of the species, i.e. Alphaproteobacteria (Rhizobium) were the exclusive symbionts from North-Central America, Betaproteobacteria (Paraburkholderia) from Eastern Brazil, and a mixture of both nodulated the widespread species. The symbiont preferences of Calliandra species are the result of the host co-evolving with the "local" symbiotic bacteria that thrive in the different edaphoclimatic conditions, e.g. the acidic soils of NE Brazil are rich in acid-tolerant Paraburkholderia, whereas those of North-Central America are typically neutral-alkaline and harbour Rhizobium. It is hypothesized that the flexibility of widespread species in symbiont choice has assisted in their wider dispersal across the neotropics.


Asunto(s)
Fabaceae , Interacciones Microbiota-Huesped , Rhizobium , Nódulos de las Raíces de las Plantas , Microbiología del Suelo , Brasil , Burkholderiaceae , ADN Bacteriano/genética , Fabaceae/microbiología , Filogenia , ARN Ribosómico 16S/genética , Rhizobium/genética , Nódulos de las Raíces de las Plantas/microbiología , Análisis de Secuencia de ADN , Simbiosis
19.
Mol Genet Metab ; 133(4): 372-377, 2021 08.
Artículo en Inglés | MEDLINE | ID: mdl-34147352

RESUMEN

Mucopolysaccharidoses (MPS) are lysosomal storage diseases (LSDs) caused by the deficiency of enzymes essential for the metabolism of extracellular matrix components called glycosaminoglycans (GAGs). To understand the physiopathology and alterations due to the lysosomal accumulation resulting from enzymatic deficiencies and their secondary outcomes can improve the diagnosis and treatment of rare genetic diseases. This work presents a database for differentially expressed genes from different public MPS data. We developed our database, including 13 studies previously deposited in the GEO (https://www.ncbi.nlm.nih.gov/geo/). The website is hosted in the UFRGS data processing center (CPD) and is available at . The site was constructed in PHP, and the analyses were performed in R. The organisms represented by the datasets are Canis lupus familiaris, Homo sapiens, Mus musculus, and Rattus norvegicus. The user can search for the differentially expressed genes and ontologies by species, MPS type, or tissue type. For each comparison, a heatmap with the 50 top differentially expressed genes is available as well as dot plots for the 30 top ontologies divided by biological process, cellular component, KEGG pathways, and molecular function. This data is also fully available in tables. There are 54 possible comparisons involving about 5000 to 10,000 genes each. This website is the only specific database for MPS with filtering and presenting their results in a one-click approach to the best of our knowledge. The development of such analytical and automated strategies accessible to health professionals is essential for fostering MPS research. The MPSBase is a web user-friendly, comprehensive repository of differentially expressed genes and ontologies regarding the MPS data.


Asunto(s)
Bases de Datos Genéticas , Expresión Génica , Enfermedades por Almacenamiento Lisosomal/genética , Mucopolisacaridosis/genética , Animales , Biomarcadores , Perros , Ontología de Genes , Humanos , Enfermedades por Almacenamiento Lisosomal/fisiopatología , Ratones , Mucopolisacaridosis/fisiopatología , Ratas
20.
Braz J Microbiol ; 52(2): 705-714, 2021 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-33594600

RESUMEN

Fungal pathogens are important determinants of plant dynamics in the environment. These pathogens can cause plant death and occasionally yield losses in crops, even at low initial densities in the soil. The objective of this study was to select and evaluate fungal antagonistic bacteria and to determine their biological control capacity in soybean seedlings. A total of 877 strains from the genera Pseudomonas, Bacillus, and Paraburkholderia/Burkholderia were screened, and their antagonistic effects on fungi frequently found in seeds were evaluated using four methods: quadruple plating, paired culture confrontation, strain containment, and inoculation of soybean seeds. The experimental design was completely randomized, with three replications for the first three methods and five replications in a 3 × 9 factorial scheme for the fourth treatment. The strains with the highest biotechnological potential were inoculated into soybean seeds to evaluate the biological control of fungi that attack this crop at germination. Seventy-nine strains presented some type of antagonistic effect on the tested fungi, with two strains presenting a broader antagonistic action spectrum in the seed test. In addition to the antagonistic potential, strains BR 10788 and BR 11793, when simultaneously inoculated or alone, significantly increased the seedling dry matter mass, and promoted the growth of soybean seedlings even in the presence of most fungi. Thus, this study demonstrated the efficiency of the antagonistic activity of these strains in relation to the target fungi, which proved to be potential agents for biological control.


Asunto(s)
Antibiosis , Bacillus/fisiología , Enfermedades de las Plantas/prevención & control , Pseudomonas/fisiología , Semillas/microbiología , Bacillus/clasificación , Hongos/fisiología , Enfermedades de las Plantas/microbiología , Pseudomonas/clasificación , Plantones/crecimiento & desarrollo , Plantones/microbiología , Semillas/crecimiento & desarrollo , Glycine max/crecimiento & desarrollo , Glycine max/microbiología
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