LUIZ UBIRAJARA SENNES
Projetos de Pesquisa
Unidades Organizacionais
Departamento de Otorrinolaringologia e Oftalmologia, Faculdade de Medicina - Docente
Instituto Central, Hospital das Clínicas, Faculdade de Medicina - Médico
LIM/63, Hospital das Clínicas, Faculdade de Medicina
LIM/32 - Laboratório de Otorrinolaringologia, Hospital das Clínicas, Faculdade de Medicina - Líder
Instituto Central, Hospital das Clínicas, Faculdade de Medicina - Médico
LIM/63, Hospital das Clínicas, Faculdade de Medicina
LIM/32 - Laboratório de Otorrinolaringologia, Hospital das Clínicas, Faculdade de Medicina - Líder
84 resultados
Resultados de Busca
Agora exibindo 1 - 10 de 84
- Extracellular Matrix Composition of the Cricopharyngeus Muscle(2012) TAVARES, Raquel Aguiar; SENNES, Luiz Ubirajara; MAUAD, Thais; IMAMURA, Rui; SILVA, Luiz Fernando Ferraz da; CARRAU, Ricardo LuisThe aim of this study was to analyze the presence and distribution of total collagen, type I and type III collagen, elastic fibers, fibronectin, and versican in the endomysium of cricopharyngeus muscles from adults of various ages. The study was a cross-sectional analysis of human cricopharyngeus muscles. Twenty-seven muscles obtained from autopsies of men and women ranging in age from 28 to 92 years were analyzed with the Picrosirius method, oxidized Weigert resorcin-fuchsin, immunohistochemistry, and image analysis. Collagen had the highest density among the analyzed components. Elastic fibers surrounded each muscle cell; they were aligned longitudinally by their long axis and associated with traversing fibers, thereby forming a fiber network with embedded muscle cells. The fibronectin and versican contents varied widely among the specimens. We found no statistically significant differences between the proportion of extracellular matrix (ECM) components and factors such as gender and race. We conclude that the higher proportion of type I and type III collagen is compatible with the cricopharyngeus muscle's sphincteric behavior, and the arrangement of the elastic fibers may also contribute to the muscle's elasticity. We found no statistically significant correlation between the ECM components and age.
- Intranasal Leptin Prevents Opioid Induced Respiratory Depression in Obesity(2020) FREIRE, Carla; PHO, Huy; KIM, Lenise; WANG, Xin; DYAVANAPALLI, Jhansi; DERGACHEVA, Olga; STREETER, Stone; FLEURY-CURADO, Thomaz; SENNES, Luiz; POLOTSKY, Vsevolod
conferenceObject Transgenic Approach To Selectively Modulate Hypoglossal Motoneurons(2016) CURADO, T. A. Fleury; PHO, H.; SENNES, L. U.; SCHWARTZ, A. R.; POLOTSKY, V. Y.- Intranasal leptin improves survival after opioid overdose in a mouse model(2021) FREIRE, Carla; PHO, Huy; BEVANS-FONTI, Shannon; SENNES, Luiz U.; POLOTSKY, Vsevolod Y.
- Influence of international authorship on citations in Brazilian medical journals: a bibliometric analysis(2019) MONTEFUSCO, Adilson Marcos; NASCIMENTO, Felipe Parra do; SENNES, Luiz Ubirajara; BENTO, Ricardo Ferreira; IMAMURA, RuiThe challenge of increasing the impact of regional journals has received much attention. While funding and research agencies require the acceptance of papers from foreign authors as a means of increasing citations, Brazilian journal editors dispute the impact of this measure. This study aimed to evaluate, for Brazilian medical journals, whether the number of citations a document received was influenced by the authors' institutional affiliations or other predictive factors related to the paper or the journal. Sixty-one medical journals published in Brazil in 2012 were selected for analysis. SCImago and Scopus were used to extract the articles and their data. The number of citations a document received in 5years was analyzed according to the authors' affiliations, language, document type, SCImago Cites per Document, and journal subject category. After adjusting for covariates by multivariate analysis, documents with collaborative international affiliations showed a citation increase of 0.17 (95% CI: 0.084-0.216) over documents by Brazilian authors. Significant increases in citations were also observed for bilingual documents (0.329; 95% CI: 0.236-0.380), English-only documents (0.159; 95% CI: 0.078-0.203), articles (1.590; 95% CI: 1.363-1.714), reviews (2.752; 95% CI: 2.355-2.972), and those under the subject category of hematology (1.280; 95% CI: 0.756-1.604). In summary, while collaborative international authorship increased citations in the investigated journals, language, type of document, and subject category had a stronger impact on the number of citations.
bookPart Emergências otorrinolaringológicas(2022) SENNES, Luiz Ubirajara- Designer Receptors Exclusively Activated by Designer Drugs Approach to Treatment of Sleep-disordered Breathing(2021) CURADO, Thomaz Fleury; PHO, Huy; FREIRE, Carla; AMORIM, Mateus R.; BONAVENTURA, Jordi; KIM, Lenise J.; LEE, Rachel; CABASSA, Meaghan E.; STREETER, Stone R.; BRANCO, Luiz G.; SENNES, Luiz U.; FISHBEIN, Kenneth; SPENCER, Richard G.; SCHWARTZ, Alan R.; BRENNICK, Michael J.; MICHAELIDES, Michael; FULLER, David D.; POLOTSKY, Vsevolod Y.Rationale: Obstructive sleep apnea is recurrent upper airway obstruction caused by a loss of upper airway muscle tone during sleep. The main goal of our study was to determine if designer receptors exclusively activated by designer drugs (DREADD) could be used to activate the genioglossus muscle as a potential novel treatment strategy for sleep apnea. We have previously shown that the prototypical DREADD ligand clozapine-N-oxide increased pharyngeal diameter in mice expressing DREADD in the hypoglossal nucleus. However, the need for direct brainstem viral injections and clozapine-N-oxide toxicity diminished translational potential of this approach, and breathing during sleep was not examined. Objectives: Here, we took advantage of our model of sleep-disordered breathing in diet-induced obese mice, retrograde properties of the adeno-associated virus serotype 9 (AAV9) viral vector, and the novel DREADD ligand J60. Methods: We administered AAV9-hSyn-hM3(Gq)-mCherry or control AAV9 into the genioglossus muscle of diet-induced obese mice and examined the effect of J60 on genioglossus activity, pharyngeal patency, and breathing during sleep. Measurements and Main Results: Compared with control, J60 increased genioglossus tonic activity by greater than sixfold and tongue uptake of 2-deoxy-2-[F-18]fluoro-D-glucose by 1.5-fold. J60 increased pharyngeal patency and relieved upper airway obstruction during non-REM sleep. Conclusions: We conclude that following intralingual administration of AAV9-DREADD, J60 can activate the genioglossus muscle and improve pharyngeal patency and breathing during sleep.
bookPart Tireoplastias: princípios e técnicas(2022) TSUJI, Domingos Hiroshi; IMAMURA, Rui; SENNES, Luiz Ubirajara- Juvenile angiofibroma: major and minor complications of preoperative embolization(2012) OGAWA, Alex Itar; FORNAZIERI, Marco Aurelio; SILVA, Leonardo Victor Espana Rueda da; PINNA, Fabio de Rezende; VOEGELS, Richard Louis; SENNES, Luis Ubirajara; PUGLIA JUNIOR, Paulo; CALDAS, Jose Guilherme Mendes PereiraIntroduction: Juvenile angiofibromas (JA) are highly vascular, benign tumours for which surgery is the treatment of choice. In most services, embolisation is performed prior to resection. Nevertheless, there are few data on the complications of preoperative embolisation for JA. Aim: To describe major and minor complications of preoperative embolisation in a 32-year experience of patients undergoing surgical resection of JA at a tertiary hospital. Methods: Retrospective chart review study of 170 patients who underwent surgical resection of JA at a tertiary hospital between September 1976 and July 2008. Results: All patients were male. Age ranged from 9 to 26 years. Ninety-one patients had no complications after embolisation. Overall, 105 complication events occurred of which four major and 101 minor. Conclusion: In our series, preoperative embolisation for JA produced no irreversible complications and no aesthetic or functional sequelae. The vast majority of complications were transient and amenable to clinical management.
- Neurostimulation Treatment of OSA(2018) CURADO, Thomaz Fleury; OLIVEN, Arie; SENNES, Luiz U.; POLOTSKY, Vsevolod Y.; EISELE, David; SCHWARTZ, Alan R.Over the past 30 years, hypoglossal nerve stimulation has moved through a development pathway to become a viable treatment modality for patients with OSA. Initial pilot studies in animals and humans laid the conceptual foundation for this approach, leading to the development of fully implantable stimulating systems for therapeutic purposes. These devices were then shown to be both safe and efficacious in feasibility studies. One such closed-loop stimulating device was found to be effective in treating a limited spectrum of apneic patients and is currently approved by the US Food and Drug Administration for this purpose. Another open-loop stimulating system is currently being rigorously tested in a pivotal trial. Collectively, clinical trials of hypoglossal nerve stimulating systems have yielded important insights that can help optimize therapeutic responses to hypoglossal nerve stimulation. These insights include specific patient selection criteria and methods for delivering stimulation to specific portions of the hypoglossal nerve and/or genioglossus muscle. New approaches for activating efferent and afferent motor pathways are currently in early-stage laboratory development and hold some long-term promise as a novel therapy.