2,421 results match your criteria: "University of Sao Paulo-School of Medicine[Affiliation]"

Background: Peri-implantitis is characterized as a pathological change in the tissues around dental implants. Fourier-transform infrared spectroscopy (FTIR) provides molecular information from optical phenomena observed by the vibration of molecules, which is used in biological studies to characterize changes and serves as a form of diagnosis.

Aims: this case-control study evaluated the peri-implant disease by using FTIR spectroscopy with attenuated total reflectance in the fingerprint region.

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In glomerulopathies, endothelial dysfunction and the presence of histological vascular lesions such as thrombotic microangiopathy, arteriolar hyalinosis, and arteriosclerosis are related to a severe clinical course and worse renal prognosis. The endothelial cell, which naturally has anti-inflammatory and anti-thrombotic regulatory mechanisms, is particularly susceptible to damage caused by various etiologies and can become dysfunctional due to direct/indirect injury or a deficiency of protective factors. In addition, endothelial regulation and protection involve participation of the complement system, factors related to angiogenesis, the renin-angiotensin system (RAS), endothelin, the glycocalyx, the coagulation cascade, interaction between these pathways, interactions between glomerular structures (the endothelium, mesangium, podocyte, and basement membrane) and interstitial structures (tubules, arterioles and small vessels).

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Background: Recent evidence indicates that statins have anti-inflammatory and antioxidant effects, leading to several investigations of whether statins have a neuroprotective effect and may benefit patients with Parkinson's disease (PD). However, the potential mechanisms of this class of medications as modifiers of the course of PD in already diagnosed patients is still unclear.

Objectives: To assess the effectiveness of statins as modifiers of established PD.

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Background: Arteriovenous Malformations (AVMs) pose a risk of neurologic deterioration, particularly when located in eloquent areas. While awake surgery is well-established for treating low-grade gliomas near eloquent areas, its efficacy for AVMs is less conclusively reported.

Methods: This study conducted a systematic review and individual patient data (IPD) meta-analysis following Cochrane Collaboration and PRISMA guidelines.

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Reoperative hybrid breast augmentation: An analysis of risk factors for complications and reoperations.

J Plast Reconstr Aesthet Surg

November 2024

Plastic Surgery Department, Hospital Moriah, Member of the Brazilian Society of Plastic Surgery (SBCP), Brazil; International Member of the American Society of Plastic Surgeons (ASPS), USA.

Background: Autogenous fat grafting (AFG) has become a common procedure to optimize aesthetic results in breast augmentation (BA). However, complications or outcomes in reoperative BA remain unclear. This study compared the outcomes or risk factors in reoperative BA with AFG and without AFG.

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Introduction: The profile of genetic and nongenetic factors associated with progression to kidney failure (KF) in steroid-resistant nephrotic syndrome (SRNS) is largely unknown in admixed populations.

Methods: A total of 101 pediatric patients with primary SRNS were genetically assessed targeting Mendelian causes and status with a 62-NS-gene panel or whole exome sequencing, as well as genetic ancestry. Variant pathogenicity was evaluated using the American College Medical of Genetics and Genomics (ACMG) criteria.

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Prion protein regulates invasiveness in glioblastoma stem cells.

BMC Cancer

December 2024

Laboratory of Neurobiology and Stem Cells, Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil.

Background: Glioblastoma (GBM) is an aggressive brain tumor driven by glioblastoma stem cells (GSCs), which represent an appealing target for therapeutic interventions. The cellular prion protein (PrP), a scaffold protein involved in diverse cellular processes, interacts with various membrane and extracellular matrix molecules, influencing tumor biology. Herein, we investigate the impact of PrP expression on GBM.

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Background: Since the introduction of the SLICC criteria in 2012, biopsy-proven lupus nephritis (LN) has been the only independent diagnostic criterion for systemic lupus erythematosus (SLE). This was reaffirmed by the EULAR/ACR in 2019, emphasizing the importance of renal biopsy in LN. However, the current classification lacks specific histopathological criteria for defining LN.

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Background: Infections by carbapenem-resistant Pseudomonas aeruginosa (CRPA) have been associated with high morbidity and mortality among solid organ recipients.

Objectives: To delineate the epidemiological and molecular characteristics of a recurrent outbreak of imipenem (IMP)-producing P. aeruginosa (CRPA) among kidney transplant (KT) recipient METHODS: We described a recurring CRPA outbreak in a KT ward, divided into two periods: before unit closure (Feb 2019-2020) and after reopening (Aug 2020-Dec 2023).

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Background: Despite adequate treatment, a subgroup of patients with inflammatory bowel disease (IBD), including Crohn`s disease and ulcerative colitis, have persistent gastrointestinal symptoms that are not always related to mucosal damage. Recently, two autoantibodies, anti-CdtB and anti-vinculin, were validated as post-infectious IBS (PI-IBS) markers, however there is limited evidence of its diagnostic role in IBD population.

Methods: Patients with more than 3 bowel movements/day and indication of colonoscopy were enrolled.

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Purpose: To investigate the agreement between the Icare HOME tonometer and the Goldmann Applanation Tonometry (GAT) in assessing the Peak Intraocular Pressure during the Water-Drinking Test (WDT).

Design: Prospective cross-sectional study.

Subjects: 79 eyes of 41 open-angle glaucoma patients were included in the study.

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Introduction: Percutaneous nephrolithotomy (PCNL) is widely performed as the preferred treatment for kidney stones larger than 20 mm in pediatric patients, with current research focusing on comparing outcomes between prone and supine positions to determine optimal procedural positioning. Therefore, the aim of this study is to compare the efficacy of prone versus supine positioning in pediatric PCNL, providing clarity on this critical aspect of the procedure to guide clinical decision-making.

Methods: We conducted a systematic review in PubMed, Embase, Scopus, Cochrane, Web of Science and Google Scholar.

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Bi-allelic variants in WDR47 cause a complex neurodevelopmental syndrome.

EMBO Mol Med

November 2024

Institut de Génétique et de Biologie Moléculaire et Cellulaire, IGBMC, Illkirch, F-67404, France.

Article Synopsis
  • Brain development involves the coordinated growth of structures necessary for forming neural circuits, with the corpus callosum being a crucial connection between brain hemispheres.
  • Defects in the growth process, particularly in the development of callosal projection neurons, can lead to syndromic corpus callosum dysgenesis (CCD) and are associated with other conditions like microcephaly.
  • The study identifies WDR47 as a key gene responsible for survival of callosal neurons and highlights its role in mitochondrial and microtubule maintenance, suggesting that mutations in this gene lead to a new neurodevelopmental syndrome involving corpus callosum abnormalities.
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Saliva has emerged as a promising diagnostic fluid for viral infections, enabling the direct analysis of viral genetic material and the detection of infection markers such as proteins, metabolites, microRNAs, and immunoglobulins. This comprehensive review aimed to explore the use of saliva as a diagnostic tool for viral infections, emphasizing its advantages and limitations. Saliva stands out due to its simplicity and safety in collection, along with the convenience of self-collection without the need for healthcare supervision, while potentially being comparable to urine and blood in terms of effectiveness.

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Introduction: Hereditary angioedema (HAE) is a rare genetic disease characterized by recurrent, potentially life-threatening angioedema episodes. Despite its severity, including the risk of asphyxiation, HAE often remains underdiagnosed. The disease significantly impacts patient quality of life (QoL), leading to anxiety, depression, and avoidance behaviors due to the unpredictable nature of attacks.

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Article Synopsis
  • * It identifies key challenges related to identifying morphological changes in lesions and evaluates current QC and QA practices globally, highlighting their benefits and limitations.
  • * The study concludes that innovative image-based technologies hold potential to enhance cytological evaluations, decrease interpretation errors, and improve teaching methods in cytology.
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Introduction: Children with idiopathic short stature (ISS) are known to have varying responses to growth hormone (GH) treatment (GHT).

Methods: We conducted a post hoc analysis to identify clinical characteristics predictive of good and poor response during year 1 of GHT. Data from the NordiNet® IOS (NCT00960128) and the ANSWER Program (NCT01009905) were used.

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Article Synopsis
  • Antibiotics are essential for treating infections and preventing illness, but their use, especially in infants, can lead to long-term health issues due to changes in gut microbiota.
  • The disruption of gut microbiota, known as gut dysbiosis, is linked to various chronic diseases like obesity, diabetes, autoimmune disorders, and some cancers.
  • Probiotics may help counteract the negative effects of gut dysbiosis in patients with chronic diseases, potentially improving their health and inflammation markers.
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Background: The minimum mortality temperature (MMT) or MMT percentile (MMTP) is an indicator of population susceptibility to nonoptimum temperatures. MMT and MMTP change over time; however, the changing directions show region-wide heterogeneity. We examined the heterogeneity of temporal changes in MMT and MMTP across multiple communities and in multiple countries.

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Article Synopsis
  • The study aimed to assess the long-term effectiveness and safety of endoscopic myoneurectomy (EMN) of the thyroarytenoid muscle in treating adductor spasmodic dysphonia (AdSD), focusing on vocal outcomes and complications.
  • Out of 48 patients treated, 79.2% experienced success, with significant improvements in vocal function reflected in a drop in the Voice Handicap Index score from 97 to 26 post-treatment.
  • While some patients faced adverse effects like granulomas and glottic insufficiency, the procedure demonstrated high success rates and minimal complications, highlighting its benefits for vocal improvement.
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Rationale: Mouth air leak is a major cause of low adherence to nasal CPAP in patients with obstructive sleep apnea (OSA). However, CPAP reports do not distinguish mouth from mask leak. We hypothesized that mouth air leak is terminated abruptly by an arousal from sleep and mouth closing that can be detected by CPAP leak waveform analysis.

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Article Synopsis
  • This study analyzes the safety of two insufflation systems (conventional vs. Valveless) used in laparoscopic robotic surgery, focusing on complications like pneumothorax and subcutaneous emphysema.
  • A literature search gathered data from various databases, ultimately including three studies with a total of 478 patients in the meta-analysis.
  • Results showed no significant differences in complications between the AirSealTM and conventional insufflation systems in maintaining pneumoperitoneum pressure.
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The international expert consensus on management of external auditory canal carcinoma.

Eur Arch Otorhinolaryngol

October 2024

Department of Otology and Skull Base Surgery, Eye Ear Nose and Throat Hospital, Fudan University, 83 Fenyang Road, Shanghai, 200031, China.

Purpose: The objective of this consensus is to provide otolaryngologists with appropriate strategies in the management of external auditory canal (EAC) carcinoma.

Methods: In the absence of randomized controlled trials, the consensus is based on expert opinions utilizing the Rand/UCLA appropriateness method [Fitch and Aguilar in The RAND/UCLA appropriateness method user's manual, RAND Corporation, Santa Monica, CA, 2001], drawing from existing literature and clinical experience.

Results: The management recommendations are structured around 12 key areas, including: definition and pathology, pathogenesis, clinical manifestations, work-up, tumor staging system, surgical management of primary tumor, surgical management of the parotid gland and the temporomandibular joint, lymph node metastasis, radiotherapy, chemotherapy, reconstruction, and follow-up.

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The objective of this study was to determine the impact of the timing of KRT, dichotomized by a temporal criterion or by creatinine level, in patients with COVID-19-related AKI. This was a retrospective study involving 512 adult patients admitted to the ICU. All participants had laboratory-confirmed COVID-19 and a confirmed diagnosis of AKI.

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