Voice handicap and voice-related quality of life in COVID-19 patients.

OBJECTIVES: Identifying voice handicap and voice-related quality of life in patients presenting pulmonary impairment associated with COVID-19 infection, comparing pulmonary parameters between these patients and individuals in the control group, as well as correlating pulmonary parameters to self-assessment questionnaires (IDV-10 and QVV). METHODS: Thirty-five (35) patients presenting pulmonary impairment with COVID-19 infection were herein selected and compared to 35 individuals who were not affected by COVID-19 infection. Two self-assessment questionnaires were applied (vocal handicap index and voice quality of life protocol). Maximum phonation time Forced Expiratory Pressure (PEF) and Forced Inspiratory Pressure (PIF) were measured and videolaryngoscopy was performed. RESULTS: There was statistically significant difference in scores recorded in voice self-assessment questionnaires (IDV-10 and QVV), Expiratory Pressure (PEF) and Forced Inspiratory Pressure (PIF) between patients with pulmonary impairment associated with COVID-19 infection and those in the control group. Correlation between PEF/PIF and scores recorded in voice self-assessment questionnaires was also observed. CONCLUSION: Pulmonary impairment associated with COVID-19 infection has worsened voice handicap and voice-related quality of life in the assessed patients, as well as reduced their forced expiratory and inspiratory pressure in comparison to the control group.

Cochlear Implants after Meningitis and Otosclerosis: A Comparison between Cochlear Ossification and Speech Perception Tests.

(1) Background: Performance after Cochlear Implantation (CI) can vary depending on numerous factors. This study aims to investigate how meningitis or otosclerosis can influence CI performance. (2) Methods: Retrospective analysis of CI performance in patients with etiological diagnosis of meningitis or otosclerosis, comparing the etiologies and analyzing the image findings, along with electrode array insertion status and technique. (3) Results: Speech recognition in CI patients with otosclerosis improves faster than in patients with meningitis. Other features such as radiological findings, degree of cochlear ossification, surgical technique used and total or partial insertion of electrodes do not seem to be directly related to speech recognition test performance. (4) Conclusions: Patients should be warned that their postoperative results have a strong correlation with the disease that caused their hearing loss and that, in cases of meningitis, a longer duration of speech-language training may be necessary to reach satisfactory results.

[Cirrhotic cardiomyopathy ­ Clinically fact or academic curiosity? Review: Part 1: definition, epidemiology, pathology and clinical manifestations] / Cardiomiopatía cirrótica ­ ¿Realidad clínica o simple curiosidad académica? Revisión. Parte 1: definición, epidemiología, anatomía patológica y clínica

Severe cirrhosis affecting myocardial function provokes a syndrome called Cirrhotic Cardiomyopathy, defined as cardiac disfunction associated with hepatic cirrhosis in the absence of other known cardiac disease. The prevalence is variable according different groups of investigation owing to the latent or subclinical course until a stressful situation unmask it such as surgery, hemorrhage, infection, hepatic transplant or transjugular intrahepatic porto-systemic shunt. We aimed to review the definition, pathology, pathophysiology, clinical manifestations, diagnostic criteria, images, clinical relevance, pharmacological treatment and hepatic transplantation.

La cirrosis avanzada puede provocar alteraciones miocárdicas que constituyen el síndrome de Cardiomiopatía Cirrótica definido como la disfunción cardíaca asociada con cirrosis hepática en ausencia de enfermedad cardíaca preexistente. Su prevalencia es variable de acuerdo a lo reportado por diferentes grupos de investigación debido a que puede mantenerse subclínica o latente hasta que la pone de manifiesto una situación de estrés como una cirugía, hemorragia, infección, trasplante hepático o shunt porto-sistémico intrahepático transyugular. El objetivo de esta revisión es discutir la definición, los fundamentos anátomo-patológicos, fisiopatología, manifestaciones clínicas, criterios de diagnóstico, importancia de los estudios con imágenes, relevancia clínica, tratamiento farmacológico y trasplante hepático.

Hippocampal Microglia Activation Induced by Acute Pancreatic Injury in Rats.

BACKGROUND: Acute pancreatitis is an inflammation of the pancreatic glandular parenchyma that causes injury with or without the destruction of pancreatic acini. Clinical and experimental evidence suggest that certain systemic proinflammatory mediators may be responsible for initiating the fundamental mechanisms involved in microglial reactivity. Here, we investigated the possible repercussions of acute pancreatitis (AP) on the production of inflammatory mediators in the brain parenchyma focusing on microglial activation in the hippocampus. METHODS: The acute pancreatic injury in rats was induced by a pancreas ligation surgical procedure (PLSP) on the splenic lobe, which corresponds to approximately 10% of total mass of the pancreas. Blood samples were collected via intracardiac puncture for the measurement of serum amylase. After euthanasia, frozen or paraffin-embedded brains and pancreas were analyzed using qRT-PCR or immunohistochemistry, respectively. RESULTS: Immunohistochemistry assays showed a large number of Iba1 and PU.1-positive cells in the CA1, CA3, and dentate gyrus (DG) regions of the hippocampus of the PLSP group. TNF-α mRNA expression was significantly higher in the brain from PLSP group. NLRP3 inflammasome expression was found to be significantly increased in the pancreas and brain of rats of the PLSP group. High levels of BNDF mRNA were found in the rat brain of PLSP group. In contrast, NGF mRNA levels were significantly higher in the control group versus PLSP group. CONCLUSION: Our findings suggest that AP has the potential to induce morphological changes in microglia consistent with an activated phenotype.

Cochlear Implantation in Children with Auditory Neuropathy: Meta-Analysis.

BACKGROUND: Auditory neuropathy (AN) is a nosological entity of unknown etiology, which is associated with fluctuations in rates of speech discrimination. Its diagnosis is based on presence of otoacoustic emissions and lack of, or abnormal, brainstem auditory evoked potential. With respect to treatment, we have variable results in the literature about development of speech perception and skills, in children with AN and cochlear implant (CI) rehabilitation. OBJECTIVES: Comparatively assessing results recorded for the development of auditory and speech skills in children with auditory neuropathy spectrum disorder (ANSD), who were subjected to cochlear implantation, in comparison to results recorded for children with sensorineural hearing loss associated with other causes was the objective of this study. METHOD: A systematic literature review with meta-analysis was performed, with studies published from 1975 to 2023. RESULTS: Nineteen studies were included in the systematic review, and eight were selected for the meta-analysis, which showed there was no evidence allowing the conclusion that the two groups were different from each other about results in speech performance after 1 year of CI placement. CONCLUSION: Therefore, this study shows that CI provides the comparable benefit to children with ANSD in comparison to children with neurosensory hearing loss associated with other causes in their speech development.

Psychometric properties of the Mexican version of the opening minds stigma scale for health care providers (OMS-HC).

Background: Healthcare providers are one of the main groups that contribute to the stigmatization of people with mental disorders. Apathy, accusation, fatalism, and morbid curiosity are the most common forms of stigmatization encountered, and these are associated with inadequate treatment, reduced treatment adherence, decreased help-seeking behavior, an increased risk of relapse, and complications with other medical conditions. The aim of this study was to examine the psychometric properties of an adapted Spanish version of the Opening Minds Stigma Scale (OMS-HC) for healthcare providers in Mexico and identify certain stigmatizing attitudes within this group. Methods: An ex-post facto cross-sectional observational study was conducted with 556 healthcare providers in Mexico, with an average age of 29.7 years, who were mostly women (80.4%). Validity was examined through confirmatory factor analysis. Differences according to gender, discipline, occupation, and educational level were analyzed using multivariate methods. Results: The factor structure of the OMS-HC, consisting of three subscales identified by the original authors of the instrument (attitudes of healthcare providers towards people with mental illness, secrecy/help-seeking, and social distance), was confirmed. The model demonstrated good fit (x2/df = 2.36, RMSEA = 0.050, CFI = 0.970, TLI = 0.962, SRMR = 0.054, NFI = 0.950, PNFI = 0.742). Internal consistency was found to be adequate (α = 0.73, ω = 0.76) for the scale itself and slightly lower than acceptable for the subscales. Significant differences were found by discipline, educational level, and, for student providers, by academic semester. Higher scores were observed on the OMS-HC scale among nursing and medical professionals, undergraduate students, and those in early semesters. Conclusions: The Spanish version of the OMS-HC has demonstrated adequate psychometric properties and could be a useful tool to facilitate research on this topic in Mexico, and to carry out comparative studies with healthcare personnel in other Spanish-speaking countries.

Blocking Hemopexin With Specific Antibodies: A New Strategy for Treating Diabetic Retinopathy.

Hemopexin (HPX) is overexpressed in the retina of patients with diabetes and induces the breakdown of the blood-retinal barrier in vitro. The aim of this study was to evaluate whether HPX blockade by specific antibodies (aHPX) could avoid vascular leakage in vivo and microvascular angiogenesis in vitro and ex vivo. For this purpose, the effect of intravitreal (IVT) injections of aHPX on vascular leakage was evaluated in db/db mice and rats with streptozotocin-induced diabetes using the Evans Blue method. Retinal neurodegeneration and inflammation were also evaluated. The antiangiogenic effect of aHPX on human retinal endothelial cells (HRECs) was tested by scratch wound healing and tube formation using standardized methods, as well as by choroidal sprouting assays from retinal explants obtained in rats. We found that IVT injection of aHPX significantly reduced vascular leakage, retinal neurodegeneration, and inflammation. In addition, treatment with aHPX significantly reduced HREC migration and tube formation induced by high glucose concentration and suppressed choroidal sprouting even after vascular endothelial growth factor stimulation, with this effect being higher than obtained with bevacizumab. The antipermeability and antiangiogenic effects of IVT injection of aHPX suggest the blockade or inhibition of HPX as a new strategy for the treatment of advanced stages of diabetic retinopathy. ARTICLE HIGHLIGHTS: Hemopexin (HPX) is the best-characterized permeability factor in steroid-sensitive nephrotic syndrome. We have previously reported that HPX is overexpressed in the retina of patients with diabetes and induces the breakdown of the blood-retinal barrier in vitro. Here, we report that intravitreal injection of anti-HPX antibodies significantly reduces vascular leakage, retinal neurodegeneration, and inflammation in diabetic murine models and that the immunoneutralization of HPX exerts a significant antiangiogenic effect in vitro and in retinal explants. The blockade of HPX can be considered as a new therapy for advanced stages of diabetic retinopathy.

Inflammation: The Link between Neural and Vascular Impairment in the Diabetic Retina and Therapeutic Implications.

The etiology of diabetic retinopathy (DR) is complex, multifactorial and compromises all the elements of the retinal neurovascular unit (NVU). This diabetic complication has a chronic low-grade inflammatory component involving multiple inflammatory mediators and adhesion molecules. The diabetic milieu promotes reactive gliosis, pro-inflammatory cytokine production and leukocyte recruitment, which contribute to the disruption of the blood retinal barrier. The understanding and the continuous research of the mechanisms behind the strong inflammatory component of the disease allows the design of new therapeutic strategies to address this unmet medical need. In this context, the aim of this review article is to recapitulate the latest research on the role of inflammation in DR and to discuss the efficacy of currently administered anti-inflammatory treatments and those still under development.

Caffeine and the Risk of Diabetic Retinopathy in Type 2 Diabetes Mellitus: Findings from Clinical and Experimental Studies.

The aim of this study was to assess the potential benefits of caffeine intake in protecting against the development of diabetic retinopathy (DR) in subjects with type 2 diabetes (T2D). Furthermore, we tested the effect of topical administration of caffeine on the early stages of DR in an experimental model of DR. In the cross-sectional study, a total of 144 subjects with DR and 147 individuals without DR were assessed. DR was assessed by an experienced ophthalmologist. A validated food frequency questionnaire (FFQ) was administered. In the experimental model, a total of 20 mice were included. One drop (5 µL) of caffeine (5 mg/mL) (n = 10) or vehicle (5 µL PBS, pH 7.4) (n = 10) was randomly administered directly onto the superior corneal surface twice daily for two weeks in each eye. Glial activation and retinal vascular permeability were assessed using standard methods. In the cross-sectional study in humans, the adjusted-multivariable model showed that a moderate and high (Q2 and Q4) caffeine intake had a protective effect of DR (odds ratio (95% confidence interval) = 0.35 (0.16-0.78); p = 0.011 and 0.35 (0.16-0.77); p = 0.010, respectively). In the experimental model, the administration of caffeine did not improve either reactive gliosis or retinal vascular permeability. Our results suggest a dose-dependent protective effect of caffeine in the development of DR, while the potential benefits of antioxidants in coffee and tea should also be considered. Further research is needed to establish the benefits and mechanisms of caffeinated beverages in the development of DR.

Surgical Treatment Applied to Bilateral Vocal Fold Paralysis in Adults: Systematic Review.

INTRODUCTION: Bilateral vocal fold paralysis is a condition accounting for great mortality and significant worsening in patients' quality of life. Treatment applied to these patients seek balance among breathing, airway protection and voice quality. AIM: Critically and systematically reviewing the current literature on the topic in order to set the best technique to restore breathing comfort, without the need of tracheostomy, in patients with bilateral vocal fold paralysis. Furthermore, it seeks the surgical type technique accounting for the best breathing rate and for the smallest changes in voice parameters. MATERIALS AND METHODS: Preferred Reporting Items for Systematic Reviews and Meta-Analyses method methodology and population, interventions, comparatives, outcomes and study design criteria were used as systematic search in the biggest databases and in the grey literature. The following meshes were used for the search: surgical interventions, surgical treatment, bilateral vocal cord paralysis, bilateral vocal fold paralysis, tracheostomy, decannulation, voice, and dysphonia. The selected studies should have followed the randomized clinical-trial type or be longitudinal observational controlled prospective studies (cohort studies). RESULTS: In total, 3,548 articles were found. After duplicate studies were removed from the selection, the inclusion and exclusion criteria were applied and 06 articles were selected for qualitative analysis. CONCLUSIONS: The assessed surgical procedures showed good cost-benefit to treat bilateral vocal fold paralysis, either because they improved the breathing function in most patients and allowed decannulation in patients with tracheostomy, or because they accounted for small changes to both voice parameters or deglutition. However, none of the described techniques has shown respiratory and functional outcomes better than those recorded for the other ones. The decision on what surgery to perform still must be made based on the judgement of an experienced surgeon.

Validation of the AquaCHROM™ ECC for the Detection and Enumeration of Coliforms and Escherichia coli in Water Samples: AOAC Performance Tested MethodSM 072202.

BACKGROUND: The AquaCHROM™ ECC method from CHROMagar is intended for the detection and enumeration of Escherichia coli and coliform bacteria in 100 mL water samples after 18-24 h of incubation at 35-37°C. OBJECTIVE: To validate the AquaCHROM ECC method for qualitative and quantitative detection of E. coli and coliforms with different water matrixes. METHODS: Inclusivity/exclusivity studies were conducted. AquaCHROM ECC was compared to U.S. cultural reference methods in unpaired matrix studies for detection of E. coli and coliforms in tap water, well water, lake water, and bottled water, and for enumeration in tap water, well water, and lake water. Three production lots of AquaCHROM ECC were tested for product consistency and stability. Variations in incubation time and temperature were evaluated in robustness testing. RESULTS: Inclusivity/exclusivity results demonstrated expected performance with the exception of three strains of Salmonella enterica, two species of Shigella, and one strain of Aeromonas, which turned the media blue or yellow. Results from the matrix studies demonstrated that AquaCHROM ECC and the reference methods are not statistically different for detection of E. coli and coliforms and statistically equivalent for enumeration of E. coli and coliforms. The AquaCHROM ECC powder production was proven to be consistent with a 24-month shelf life. Variation in temperature did not affect the method performance. Shortening the incubation time is not recommended. CONCLUSION: AquaCHROM ECC is an effective method for the detection and enumeration of E. coli and coliforms for the water matrixes evaluated. HIGHLIGHTS: The AquaCHROM ECC method is a quick, one-step method for the recovery and enumeration of E. coli and coliforms in 100 mL water samples. It is a non-agar-based chromogenic medium which provides a clear result without the use of a UV lamp.

Enhancing the importance of value-based urology and uro-oncology / Realzar la importancia de la urología y la uro-oncología basadas en valores

With the ongoing advances and evolution in healthcare, we have witnessed new breakpoints in patient management. As a result, there have been tireless efforts to identify and eradicate barriers to care and minimize their impact on patients.

Con los continuos avances y la evolución de la asistencia sanitaria, hemos sido testigos de nuevos puntos de inflexión en la gestión de los pacientes. Como resultado, se han realizado incansables esfuerzos para identificar y erradicar las barreras a la atención y minimizar su impacto en los pacientes.

Systematic review: interventions in sickle cell disease-related priapism in reducing overall morbidity, recurrence, and side effects / Revisión sistemática: intervenciones en priapismo relacionado con enfermedad de células falciformes (ECF), en reducción de morbilidad, recurrencia y efectos secundarios

Pediatric priapism is a rare, underreported urological emergency. Sickle cell disease (SCD)-related priapism cases should be assessed considering specific pathophysiologic characteristics. Chronic control of the disease has an impact on a patient's quality of life. A systematic review in different databases was done, for defining if management in All-type priapism in SCD patients was equally effective in reducing overall morbidity, disability and comorbidities, recurrence, and therapy-related side effects. Qualitative analysis was performed. Nine studies were included in the study; the majority were case series, and 300 patients were included in the analysis. The interventions and outcomes were clinically heterogeneous but displayed perspectives for further studies. This is the first analysis approach for a consensus for SCD-related priapism treatment. Studies with internal validity and causality designs are needed, to evaluate further causality relationships and establish evidence-based approaches. Etilefrine, Pseudoephedrine/etilefrine-5 inhibitors, and finasteride are promising strategies. Quality of life scores should be applied to these patients, and molecular studies should be developed for pharmacological designs.

El priapismo pediátrico es una entidad poco común, sin embargo, es una urgencia urológica infranotificada. Los casos de priapismo relacionados con enfermedad de células falciformes (ECF) deben evaluarse teniendo en cuenta características fisiopatológicas específicas. El control crónico de la enfermedad tiene impacto en la calidad de vida del paciente. Se realizó una revisión sistemática en diferentes bases de datos, para definir si las intervenciones en pacientes con priapismo de todo tipo relacionado con ECF fueron igualmente efectivas en la reducción de morbilidad general, discapacidad, comorbilidades, recurrencia y efectos secundarios relacionados con la terapia. Se realizó un análisis cualitativo de nueve estudios; la mayoría series de casos, para un total de 300 pacientes. Las intervenciones y los resultados fueron clínicamente heterogéneos, pero mostraron perspectivas para futuros estudios. Este es el primer análisis de información para llegar a un consenso para el tratamiento del priapismo relacionado con la ECF. La perspectiva principal es la necesidad de estudios con validez interna y diseños elaborados para profundizar las relaciones de causalidad y el abordaje basado en la evidencia de esta condición. La etilefrina, los inhibidores de la PDE-5 y la finasterida son estrategias prometedoras. Se deben aplicar puntajes de calidad de vida a estos pacientes y se deben desarrollar estudios moleculares para diseños farmacológicos.

Association between dysphagia and tongue strength in patients with amyotrophic lateral sclerosis / Associação entre disfagia e força da língua em pacientes com esclerose lateral amiotrófica

Abstract Introduction Amyotrophic lateral sclerosis is the most common motor neuron disease in adults despite it being rare. It is a neurodegenerative disease in which dysphagia is a common and debilitating symptom. Dysphagia can be assessed by complementary exams, such as fiberoptic endoscopic evaluation of swallowing and the tongue strength test, as this is one of the main muscles involved in swallowing. Objective To compare the results of tongue strength and endurance measured by the Iowa oral performance instrument with the findings of the fiberoptic endoscopic evaluation of swallowing examination in patients affected by amyotrophic lateral sclerosis. Methods Cross-sectional study, carried out in a tertiary hospital specialized in treatment and rehabilitation. Twenty-five patients diagnosed with amyotrophic lateral sclerosis underwent dysphagia questionnaires, fiberoptic endoscopic evaluation of swallowing examination and tongue strength and resistance test with the Iowa oral performance instrument to assess the presence of dysphagia. Results Forty-eight percent of the sample had dysphagia at the fiberoptic endoscopic evaluation of swallowing and 76% had an altered tongue strength test. Ninety percent of patients with dysphagia had an average tongue pressure lower than 34.2 KPa. The tongue strength test showed sensitivity of 91.67% and specificity of 38.46% and accuracy of 64%. There was a statistically significant relationship between tongue strength and dysphagia and between tongue resistance and dysphagia. Conclusion Tongue strength tests, such as the Iowa oral performance instrument, proved to be effective in assessing dysphagia. This result should encourage further research to facilitate the early diagnosis of dysphagia.

Resumo Introdução A esclerose lateral amiotrófica é a doença do neurônio motor mais comum nos adultos, a despeito da baixa incidência e da raridade. É uma doença neurodegenerativa na qual a disfagia é um sintoma comum e debilitante. A disfagia pode ser avaliada por exames complementares como a videoendoscopia da deglutição e testes de força de língua, uma vez que se trata de um dos principais músculos envolvidos na deglutição. Objetivo Comparar os resultados da força e resistência da língua aferidos pelo Iowa Oral Performance Instrument com os achados do exame à videoendoscopia da deglutição, em pacientes acometidos por esclerose lateral amiotrófica. Método Estudo transversal, feito em um hospital terciário especializado em tratamento e reabilitação. Vinte e cinco pacientes com diagnóstico de esclerose lateral amiotrófica foram submetidos a questionários de disfagia, exame de videoendoscopia da deglutição e teste de força e resistência de língua com o Iowa Oral Performance Instrument para avaliar a presença de disfagia. Resultado Quarenta e oito por cento da amostra apresentavam disfagia à videoendoscopia da deglutição e 76% apresentavam teste de força de língua alterado. Noventa por cento dos pacientes com disfagia apresentaram pressão de língua média inferior a 34,2 KPa. O teste de força de língua apresentou sensibilidade de 91,67% e especificidade de 38,46% e acurácia de 64%. Houve relação estatisticamente significante entre força da língua e disfagia e entre resistência da língua e disfagia. Conclusão Testes de força de língua, como o Iowa Oral Performance Instrument, mostrou‐se eficaz para avaliar disfagia, mostrou sua associação com a força e resistência da língua. Esse resultado deve fomentar a feitura de novas pesquisas para facilitar o diagnóstico precoce da disfagia.

Supraglottic stenosis as a late complication of radiotherapy: a case report.

Nasopharyngeal carcinoma is rare and affect mainly men between the fourth and sixth decades of life. The clinic is characterized to be nonspecific and the main complaints or findings related to this disease are: cervical mass, aural dysfunction, and headache. The basis of treatment is radiotherapy that involves a wide field of irradiation of normal tissues, which usually generates sequelae with direct implications for quality of life. We report a case of a nasopharyngeal carcinoma treated with radiotherapy and chemotherapy that evolved, after 8 years, into supraglottic stenosis. We emphasize the relevance of clinical follow-up after radiotherapy, particularly due to the late sequelae and the relevance of using radiotherapy devices with a more focal cancer field, in order to minimize complications.

Antioxidant Effects of DPP-4 Inhibitors in Early Stages of Experimental Diabetic Retinopathy.

Hyperglycemia-induced oxidative stress plays a key role in the impairment of the retinal neurovascular unit, an early event in the pathogenesis of DR. The aim of this study was to assess the antioxidant properties of topical administration (eye drops) of sitagliptin in the diabetic retina. For this purpose, db/db mice received sitagliptin or vehicle eye drops twice per day for two weeks. Age-matched db/+ mice were used as the control group. We evaluated retinal mRNA (RT-PCR) and protein levels (Western blotting and immunohistochemistry) of different components from both the antioxidant system (NRF2, CAT, GPX, GR, CuZnSOD, and MnSOD) and the prooxidant machinery (PKC and TXNIP). We also studied superoxide levels (dihydroethidium staining) and oxidative damage to DNA/RNA (8-hydroxyguanosine immunostaining) and proteins (nitrotyrosine immunostaining). Finally, NF-кB translocation and IL-1ß production were assessed through Western blotting and/or immunohistochemistry. We found that sitagliptin protected against diabetes-induced oxidative stress by reducing superoxide, TXNIP, PKC, and DNA/RNA/protein oxidative damage, and it prevented the downregulation of NRF2 and antioxidant enzymes, with the exception of catalase. Sitagliptin also exerted anti-inflammatory effects, avoiding both NF-кB translocation and IL-1ß production. Sitagliptin prevents the diabetes-induced imbalance between ROS production and antioxidant defenses that occurs in diabetic retinas.

Is There a Difference between the Preoperative and Postoperative Serum Levels of Interleukin-6 and Tumor Necrosis Factor-α in Children Submitted to Adenotonsillectomy?

Abstract Introduction Palatine and pharyngeal tonsils are the first line of defense against pathogens. Clinically, two alterations may require surgical removal of the tonsils: hypertrophy and recurrent tonsillitis. The two conditions probably result from a dysfunction of the immune system. Objective To evaluate possible differences in the plasma levels of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and interleukin-10 (IL-10) in patients submitted to adenotonsillectomy. Methods Prospective, longitudinal study with 25 children undergoing adenotonsillectomy separated into 3 different groups: recurrent tonsillitis (RT), composed of 7 patients; recurrent hypertrophy tonsillitis (RTTH), with 8 patients; and the tonsillar hypertrophy (TH) group, with 10 patients. Ten healthy control children (SD) were also included in the study. Peripheral blood was collected, and plasma was separated to measure the levels of TNF-α, IL-6, and IL-10. The Mann-Whitney test was used for statistical analysis. Results The plasma level of IL-6 was higher in the RT (p= 0.0394) and TH (p= 0.0009) groups, compared with the control group. The TH group also had higher levels of IL-6 than the RT group (p= 0.039). The IL-6/IL-10 ratio was higher in the RT (p= 0.029) and TH (p= 0.0005) groups compared with the control group. Between the RT and RTTH groups, the IL-6/IL-10 ratio was higher in the RT group, with a statistically significant difference (p= 0.0091). Conclusion Patients with a history of chronic tonsillitis had higher levels of IL-6, compared with the control group.

Is There a Difference between the Preoperative and Postoperative Serum Levels of Interleukin-6 and Tumor Necrosis Factor-α in Children Submitted to Adenotonsillectomy?

Introduction Palatine and pharyngeal tonsils are the first line of defense against pathogens. Clinically, two alterations may require surgical removal of the tonsils: hypertrophy and recurrent tonsillitis. The two conditions probably result from a dysfunction of the immune system. Objective To evaluate possible differences in the plasma levels of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and interleukin-10 (IL-10) in patients submitted to adenotonsillectomy. Methods Prospective, longitudinal study with 25 children undergoing adenotonsillectomy separated into 3 different groups: recurrent tonsillitis (RT), composed of 7 patients; recurrent hypertrophy tonsillitis (RTTH), with 8 patients; and the tonsillar hypertrophy (TH) group, with 10 patients. Ten healthy control children (SD) were also included in the study. Peripheral blood was collected, and plasma was separated to measure the levels of TNF-α, IL-6, and IL-10. The Mann-Whitney test was used for statistical analysis. Results The plasma level of IL-6 was higher in the RT ( p = 0.0394) and TH ( p = 0.0009) groups, compared with the control group. The TH group also had higher levels of IL-6 than the RT group ( p = 0.039). The IL-6/IL-10 ratio was higher in the RT ( p = 0.029) and TH ( p = 0.0005) groups compared with the control group. Between the RT and RTTH groups, the IL-6/IL-10 ratio was higher in the RT group, with a statistically significant difference ( p = 0.0091). Conclusion Patients with a history of chronic tonsillitis had higher levels of IL-6, compared with the control group.

Minimum Effective Dose of DPP-4 Inhibitors for Treating Early Stages of Diabetic Retinopathy in an Experimental Model.

The neurovascular unit (NVU) plays an essential role in the development of diabetic retinopathy (DR). We previously reported that the topical administration (eye drops) of sitagliptin and saxagliptin, two dipeptidyl peptidase-4 inhibitors (DPP-4i), prevents retinal neurodegeneration and vascular leakage in db/db mice. The aim of the present study is to evaluate the minimum effective dose of the topical administration of these DPP-4i. For this purpose, sitagliptin and saxagliptin were tested at different concentrations (sitagliptin: 1 mg/mL, 5 and 10 mg/mL, twice per day; saxagliptin: 1 and 10 mg/mL, once or twice per day) in db/db mice. As end points of efficacy, the hallmarks of NVU impairment were evaluated: reactive gliosis, neural apoptosis, and vascular leakage. These parameters were assessed by immunohistochemistry, cell counting, and the Evans blue method, respectively. Our results demonstrated that the minimum effective dose is 5 mg/mL twice per day for sitagliptin, and 10 mg/mL twice per day for saxagliptin. In conclusion, this study provides useful results for the design of future preclinical regulatory studies and for planning clinical trials.