Oral and gut microbial profiling in periodontitis and Parkinson's disease.

Objectives: We tested the hypothesis that Parkinson's disease (PA) alters the periodontitis-associated oral microbiome. Method: Patients with periodontitis with Parkinson's disease (PA+P) and without PA (P) and systemically and periodontally healthy individuals (HC) were enrolled. Clinical, periodontal and neurological parameters were recorded. The severity of PA motor functions was measured. Unstimulated saliva samples and stool samples were collected. Next-generation sequencing of 16S ribosomal RNA (V1-V3 regions) was performed. Results: PA patients had mild-to-moderate motor dysfunction and comparable plaque scores as those without, indicating that oral hygiene was efficient in the PA+P group. In saliva, there were statistically significant differences in beta diversity between HC and PA+P (p = 0.001), HC and P (p = 0.001), and P and PA+P (p = 0.028). The microbial profiles of saliva and fecal samples were distinct. Mycoplasma faucium, Tannerella forsythia, Parvimonas micra, and Saccharibacteria (TM7) were increased in P; Prevotella pallens, Prevotella melaninogenica, Neisseria multispecies were more abundant in PA+P group, Ruthenibacterium lactatiformans, Dialister succinatiphilus, Butyrivibrio crossotus and Alloprevotella tannerae were detected in fecal samples in P groups compared to healthy controls. Conclusions: No significant differences were detected between Parkinson's and non-Parkinson's gut microbiomes, suggesting that Parkinson's disease modifies the oral microbiome in periodontitis subjects independent of the gut microbiome.

Modulating the sEH/EETs Axis Restrains Specialized Proresolving Mediator Impairment and Regulates T Cell Imbalance in Experimental Periodontitis.

Epoxyeicosatrienoic acids (EETs) and other epoxy fatty acids are short-acting lipids involved in resolution of inflammation. Their short half-life, due to its metabolism by soluble epoxide hydrolase (sEH), limits their effects. Specialized proresolving mediators (SPMs) are endogenous regulatory lipids insufficiently synthesized in uncontrolled and chronic inflammation. Using an experimental periodontitis model, we pharmacologically inhibited sEH, examining its impact on T cell activation and systemic SPM production. In humans, we analyzed sEH in the gingival tissue of periodontitis patients. Mice were treated with sEH inhibitor (sEHi) and/or EETs before ligature placement and treated for 14 d. Bone parameters were assessed by microcomputed tomography and methylene blue staining. Blood plasma metabololipidomics were carried out to quantify SPM levels. We also determined T cell activation by reverse transcription-quantitative PCR and flow cytometry in cervical lymph nodes. Human gingival samples were collected to analyze sEH using ELISA and electrophoresis. Data reveal that pharmacological sEHi abrogated bone resorption and preserved bone architecture. Metabololipidomics revealed that sEHi enhances lipoxin A4, lipoxin B4, resolvin E2, and resolvin D6. An increased percentage of regulatory T cells over Th17 was noted in sEHi-treated mice. Lastly, inflamed human gingival tissues presented higher levels and expression of sEH than did healthy gingivae, being positively correlated with periodontitis severity. Our findings indicate that sEHi preserves bone architecture and stimulates SPM production, associated with regulatory actions on T cells favoring resolution of inflammation. Because sEH is enhanced in human gingivae from patients with periodontitis and connected with disease severity, inhibition may prove to be an attractive target for managing osteolytic inflammatory diseases.

Parkinson's disease alters the composition of subgingival microbiome.

Aim: The current study aimed to test the hypothesis that Parkinson's disease exacerbates periodontitis by altering its microbiome. Materials and Methods: Clinical periodontal parameters were recorded. Subgingival samples from healthy controls, periodontitis patients (PD), and Parkinson's patients with periodontitis (PA+PD) were analyzed using the checkerboard DNA-DNA hybridization technique for targeting 40 bacterial species typically associated with periodontal disease and health. Next-generation sequencing (NGS) of the 16S ribosomal RNA gene (V1-V3 regions) was performed to analyze the microbiome comprehensively. Results: Parkinson's patients had mild-to-moderate motor dysfunctions. Bleeding on probing was significantly increased in the PA+PD group compared to PD (p < 0.05). With checkerboard analysis, PA was associated with increased Treponema socranskii (p = 0.0062), Peptostreptococcaceae_[G-6] [Eubacterium]_nodatum (p = 0.0439), Parvimona micra (p < 0.0001), Prevotella melaninogenica (p = 0.0002), Lachnoanaerobaculum saburreum (p < 0.0001), and Streptococcus anginosus (p = 0.0020). Streptococcus intermedia (p = 0.0042), P.nodatum (p = 0.0022), P. micra (p = 0.0002), Treponema denticola (p = 0.0045), L.saburreum (p = 0.0267), P.melaninogenica (p = 0.0017), Campylobacter rectus (p = 0.0020), and T.socranskii (p = 0.0002) were higher; Aggregatibacter actinomycetemcomitans (p = 0.0072) was lower in deep pockets in the PA+PD compared to PD. Schaalia odontolytica (p = 0.0351) and A.actinomycetemcomitans (p = 0.002) were lower; C.rectus (p = 0.0002), P. micra (p = 0065), Streptococcus constellatus (p = 0.0151), T.denticola (p = 0.0141), P.melaninogenica (p = 0.0057), and T.socranskii (p = 0.0316) were higher in shallow pockets in the PA+PD. Diversity decreased in PD (p = 0.001) and PA+PD (p = 0.026) compared to control, with minimal differences in alpha and beta diversities among PD and PA+PD based on NGS results. Conclusion: These data demonstrated that Parkinson's disease modifies PD-associated subgingival microbiome.

Parkinson's disease is positively associated with periodontal inflammation.

BACKGROUND: Parkinson's disease (PA) affects 1% of the global population above 60 years. PA pathogenesis involves severe neuroinflammation that impacts systemic and local inflammatory changes. We tested the hypothesis that PA is associated with periodontal tissue inflammation promoting a greater systemic inflammatory burden. METHODS: We recruited 60 patients with Stage III, Grade B periodontitis (P) with and without PA (n = 20 for each). We also included systemically and periodontally healthy individuals as controls (n = 20). Clinical periodontal parameters were recorded. Serum, saliva, and gingival crevicular fluid (GCF) samples were collected to measure the inflammatory and neurodegenerative targets (YKL-40, fractalkine, S100B, alpha-synuclein, tau, vascular cell adhesion protein-1 (VCAM-1), brain-derived neurotrophic factor (BDNF), neurofilament light chain (NfL). RESULTS: Parkinson's patients in this study had mild to moderate motor dysfunctions, which did not prevent them from performing optimal oral hygiene control. Periodontal parameters and GCF volume were significantly higher in the P and P+PA groups than in the control group. PA was associated with significantly increased bleeding on probing (BOP) compared to P-alone (p < 0.05), while other clinical parameters were similar between P and P+PA groups. In saliva and serum, YKL-40 levels were higher in the P+PA group than in P and C groups (p < 0.001). GCF NfL levels from shallow sites were significantly higher in the P+PA group compared to the C group (p = 0.0462). GCF S100B levels from deep sites were higher in the P+PA group than in healthy individuals (p = 0.0194). CONCLUSION: The data suggested that PA is highly associated with increased periodontal inflammatory burden-bleeding upon probing and inflammatory markers-in parallel with PA-related neuroinflammation.

Experiencia de una Unidad de Ventilación Mecánica Pediátrica Prolongada en un hospital público de Chile / Experience in a Pediatric Prolonged Mechanical Ventilation Unit from a public hospital in Chile

Introducción: Los pacientes hospitalizados con altas dependencias tecnológicas respiratorias son cada vez más frecuentes y generan largas estadías en unidades de cuidados intensivos. Las estrategias que mitiguen su impacto han sido escasamente descritas. Objetivo: Describir 6 años de experiencia de una Unidad de Ventilación Mecánica Prolongada Pediátrica.Métodos: Estudio retrospectivo. Se incluyeron todos los niños ingresados a la Unidad entre 10-2012 y 12-2018. Se realizó estadística descriptiva e inferencial, analizando tiempos de hospitalización y reingresos. Se compararon distintas variables según tipo de patología y ventilación mecánica.Resultados: 113 pacientes registraron 310 ingresos a la Unidad. Edad de ingreso: 2,2 años (0,6-8,8); varones: el 60,2 %. Patologías: enfermedad neuromuscular (el 22,1 %), enfermedad pulmonar crónica (el 20,4 %), daño neurológico (el 34,5 %), obstrucción de vía aérea superior (el 9,7 %), cardiopatía (el 3,5 %), síndrome de Down (el 9,7 %). Se utilizaron 10 507 días/cama; con índice ocupacional del 92,6 %, el 54,8 % de traslados a la Unidad de Cuidados Intensivos y el 66,1 % de reingresos. Hospitalización media: 16 días (6,5-49,0); diferencias en edad de ingreso según patologías (p = 0,032). Hubo más reingresos en niños con daño neurológico y síndrome de Down (p = 0,004). Los niños con asistencia ventilatoria invasiva presentaron más días de hospitalización (p < 0,001) y reingresos (p < 0,001).Conclusión: El índice ocupacional fue superior al 90 %; permitió mayor disponibilidad de camas intensivas y egresar a todos los pacientes. Los niños con asistencia ventilatoria invasiva se hospitalizaron más tiempo y reingresaron más

Introduction: Hospitalized patients with high respiratory technology dependency are increasingly common and result in lengthy stays in intensive care units. Strategies mitigating its impact have been scarcely described.Objective: To describe a 6-year experience in a Pediatric Prolonged Mechanical Ventilation Unit.Methods: Retrospective study. All children admitted to the unit between October 2012 and December 2018 were included. Descriptive and inferential statistical methods were used, analyzing lengths of stay and readmissions. Different outcome measures were compared according to the type of pathology and mechanical ventilation.Results: A total of 113 patients had 310 admissions to the unit. Age at admission: 2.2 years (0.6-8.8); males: 60.2 %. Pathologies: neuromuscular disease (22.1 %), chronic lung disease (20.4 %), neurological damage (34.5 %), upper airway obstruction (9.7 %), heart disease (3.5 %), Down syndrome (9.7 %). A total of 10 507 bed-days were used; with a 92.6 % occupancy rate, 54.8 % of transfers to the intensive care unit, and 66.1 % of readmissions. Mean length of stay: 16 days (6.5-49.0); differences in age at admission observed by pathology (p = 0.032). More readmissions were observed in children with neurological damage and Down syndrome (p = 0.004). Children with invasive ventilation were observed to have a longer length of stay (p < 0.001) and more readmissions (p < 0.001).Conclusion: The occupancy rate at the PMVU was over 90 %, which allowed more available intensive care beds and discharging all patients. Children with invasive ventilation had a longer length of stay and more readmissions.

Experience in a Pediatric Prolonged Mechanical Ventilation Unit from a public hospital in Chile. / Experiencia de una Unidad de Ventilación Mecánica Pediátrica Prolongada en un hospital público de Chile.

INTRODUCTION: Hospitalized patients with high respiratory technology dependency are increasingly common and result in lengthy stays in intensive care units. Strategies mitigating its impact have been scarcely described. OBJECTIVE: To describe a 6-year experience in a Pediatric Prolonged Mechanical Ventilation Unit. METHODS: Retrospective study. All children admitted to the unit between October 2012 and December 2018 were included. Descriptive and inferential statistical methods were used, analyzing lengths of stay and readmissions. Different outcome measures were compared according to the type of pathology and mechanical ventilation. RESULTS: A total of 113 patients had 310 admissions to the unit. Age at admission: 2.2 years (0.6-8.8); males: 60.2 %. PATHOLOGIES: neuromuscular disease (22.1 %), chronic lung disease (20.4 %), neurological damage (34.5 %), upper airway obstruction (9.7 %), heart disease (3.5 %), Down syndrome (9.7 %). A total of 10 507 bed-days were used; with a 92.6 % occupancy rate, 54.8 % of transfers to the intensive care unit, and 66.1 % of readmissions. Mean length of stay: 16 days (6.5- 49.0); differences in age at admission observed by pathology (p = 0.032). More readmissions were observed in children with neurological damage and Down syndrome (p = 0.004). Children with invasive ventilation were observed to have a longer length of stay (p < 0.001) and more readmissions (p < 0.001). CONCLUSION: The occupancy rate at the PMVU was over 90 %, which allowed more available intensive care beds and discharging all patients. Children with invasive ventilation had a longer length of stay and more readmissions.

Introducción: Los pacientes hospitalizados con altas dependencias tecnológicas respiratorias son cada vez más frecuentes y generan largas estadías en unidades de cuidados intensivos. Las estrategias que mitiguen su impacto han sido escasamente descritas. Objetivo: Describir 6 años de experiencia de una Unidad de Ventilación Mecánica Prolongada Pediátrica. Métodos: Estudio retrospectivo. Se incluyeron todos los niños ingresados a la Unidad entre 10-2012 y 12-2018. Se realizó estadística descriptiva e inferencial, analizando tiempos de hospitalización y reingresos. Se compararon distintas variables según tipo de patología y ventilación mecánica. Resultados: 113 pacientes registraron 310 ingresos a la Unidad. Edad de ingreso: 2,2 años (0,6-8,8); varones: el 60,2 %. Patologías: enfermedad neuromuscular (el 22,1 %), enfermedad pulmonar crónica (el 20,4 %), daño neurológico (el 34,5 %), obstrucción de vía aérea superior (el 9,7 %), cardiopatía (el 3,5 %), síndrome de Down (el 9,7 %). Se utilizaron 10 507 días/cama; con índice ocupacional del 92,6 %, el 54,8 % de traslados a la Unidad de Cuidados Intensivos y el 66,1 % de reingresos. Hospitalización media: 16 días (6,5-49,0); diferencias en edad de ingreso según patologías (p = 0,032). Hubo más reingresos en niños con daño neurológico y síndrome de Down (p = 0,004). Los niños con asistencia ventilatoria invasiva presentaron más días de hospitalización (p < 0,001) y reingresos (p < 0,001). Conclusión: El índice ocupacional fue superior al 90 %; permitió mayor disponibilidad de camas intensivas y egresar a todos los pacientes. Los niños con asistencia ventilatoria invasiva se hospitalizaron más tiempo y reingresaron más.

[Polygraphy in hospitalized children under 3 months]. / Poligrafía en menores de 3 meses hospitalizados.

Apnea and apparently lethal events have great etiological diversity thus complementary tests may help diagnosis. The aim of this study was to describe the results of polygraph studies of children under 3 months hospitalized with suspected apnea. PATIENTS AND METHODS: Retrospective case series. Children under 3 months with suspected apnea were considered and in whom a polygraphy (PG) was performed during hospitalization. General data, the apnea/hypopnea index (AHI), index of central. apnea, obstructive apnea index, average and minimum saturation were recorded. Desaturation index (ID) below 80% higher 1 per hour, one or more events of desaturation below 80% for more than 20 seconds or an AHI greater than or equal 1 were considered as criteria of sleep disorder breathing (SLB). Descriptive analysis was performed and the associations between AHI and saturation parameters were determined. RESULTS: 51 patients, 32 males, entered the study. 15,6% had altered PG. In 5 of them coexisted more than one diagnostic criterion. Iin 15,6% of the patients was observed an IAH greater 1, in 7.8% a desaturation index below 80% and in 11,8% a desaturation index under 80% for 20 seconds greater than 1. The AHI was associated with the parameters of saturation. CONCLUSION: Most of the patients had normal PG and among patients with a suggestive SLB a pattern of respiratory immaturity prevailed, which is characteristic of this age.

Poligrafía en menores de 3 meses hospitalizados / Polygraphy in hospitalized children under 3 months

La apnea y eventos aparentemente letales poseen una gran diversidad etiológica por tanto exámenes complementarios podrían contribuir a su diagnóstico. El objetivo del presente estudio fue describir los resultados de estudios poligráficos de niños menores de 3 meses hospitalizados con sospecha de apnea. PACIENTES Y MÉTODO: Serie retrospectiva de casos. Se consideraron niños menores de 3 meses con sospecha de apnea y en quienes se realizó una poligrafía (PG) durante su hospitalización. Se registraron datos generales, así como también, el índice de apnea/hipopnea (IAH), índice de apnea central, índice de apnea obstructiva, saturación promedio y mínima. Como criterios de trastornos respiratorios del sueño (TRS) fueron considerados: índice de desaturaciones (ID) por debajo de 80% mayor 1 por hora; uno o más eventos de desaturaciones por debajo de 80% por más de 20 segundos; o un IAH mayor o igual 1. Se realizó estadística descriptiva y se determinó la posible asociación entre el IAH y parámetros de saturación. RESULTADOS: Ingresaron 51 pacientes, 32 varones. 8 (15,6%) presento PG alteradas, de ellos, en 5 coexistió más de un criterio diagnóstico. En el 15,6% se observó un IAH mayor o igual a 1, en el 7,8% se observó un índice de desaturación bajo 80% y en el 11,8% un índice de desaturación bajo 80% por más de 20 segundos. El IAH se asoció con los parámetros de saturación. CONCLUSIÓN: La mayoría de los pacientes presentó PG normales y entre los pacientes con TRS predominó un patrón poligráfico sugerente de inmadurez respiratoria, lo cual, es característico de esta edad.

Apnea and apparently lethal events have great etiological diversity thus complementary tests may help diagnosis. The aim of this study was to describe the results of polygraph studies of children under 3 months hospitalized with suspected apnea. PATIENTS AND METHODS: Retrospective case series. Children under 3 months with suspected apnea were considered and in whom a polygraphy (PG) was performed during hospitalization. General data, the apnea/hypopnea index (AHI), index of central. apnea, obstructive apnea index, average and minimum saturation were recorded. Desaturation index (ID) below 80% higher 1 per hour, one or more events of desaturation below 80% for more than 20 seconds or an AHI greater than or equal 1 were considered as criteria of sleep disorder breathing (SLB). Descriptive analysis was performed and the associations between AHI and saturation parameters were determined. RESULTS: 51 patients, 32 males, entered the study. 15,6% had altered PG. In 5 of them coexisted more than one diagnostic criterion. Iin 15,6% of the patients was observed an IAH greater 1, in 7.8% a desaturation index below 80% and in 11,8% a desaturation index under 80% for 20 seconds greater than 1. The AHI was associated with the parameters of saturation. CONCLUSION: Most of the patients had normal PG and among patients with a suggestive SLB a pattern of respiratory immaturity prevailed, which is characteristic of this age.

Correlación clínico-patológica en casos fatales de dengue en Maracaibo, Venezuela / Clinical and pathological correlation in fatal dengue cases found in Maracaibo, Venezuela

INTRODUCCIÓN: dada la importancia del dengue en América, es elemental conocer la causa de muerte de los infectados y evaluar los escasos estudios de necropsias. OBJETIVO: describir y analizar los hallazgos anatomopatológicos relevantes en casos fatales de dengue en un área endémica venezolana. MÉTODOS: se estudiaron 8 casos mortales con criterios clínico-epidemiológicos de dengue o comprobados mediante pruebas serológicas (o ambos), sometidos a necropsia clínica completa. Los tejidos se procesaron con técnicas histopatológicas habituales. RESULTADOS: todos los casos evidenciaron enfermedad pulmonar severa (daño alveolar difuso, edema pulmonar no cardiogénico, tromboembolismo, bronconeumonía, neumonitis, hemorragia intraalveolar); 6 mostraron derrame en cavidad pleural o abdominal, o en ambas. Necrosis hepática focal se presentó en 2 casos. La causa de muerte se relacionó con insuficiencia respiratoria en 6 casos secundaria a enfermedad pulmonar, 2 con choque hipovolémico y 1 desarrolló insuficiencia hepática. CONCLUSIONES: los casos mortales por dengue estudiados evidenciaron compromiso pulmonar severo relacionado con la muerte, a diferencia de lo reportado en otros estudios de necropsias en América. También desarrollaron afectación multiorgánica, que en la mayoría de los casos condujo a la muerte no vinculada directamente a choque hipovolémico. Estos hallazgos de necropsias permitirían proyectar estrategias terapéuticas en pro de evitar la mortalidad.

INTRODUCTION: given the importance of dengue in America, it is indispensable to know the cause of death of the infected people and to evaluate the few necropsy studies available. OBJECTIVE: to describe and to analyze the relevant clinical and pathological findings in fatal dengue cases of dengue in a Venezuelan endemic area. METHODS: eight fatal cases, according to clinical and epidemiological dengue criteria and/or confirmed by complete serological tests were studied after complete clinical necropsy. The tissues were processed by standard histopathological techniques. RESULTS: all these cases showed severe lung disease (diffuse alveolar damage, non cardiogenic pulmonary edema, thromboembolism, bronchopneumonia, pneumonitis, intralveolar hemorrhage). Six presented with pleural or abdominal effusion. Focal hepatic necrosis was found in two cases. The cause of death was related to respiratory failure in six cases secondary to lung disease; two with hypovolemic shock, and one developed liver failure. CONCLUSIONS: the studied dengue cases showed fatal severe pulmonary compromise leading to death, unlike those reported in other studies of autopsies in The Americas. They also developed multiple organ failure, which in most cases led to death not directly associated to hypovolemic shock. These findings in autopsies will allow designing therapeutic strategies to avoid mortality.

[Clinical and pathological correlation in fatal dengue cases found in Maracaibo, Venezuela]. / Correlación clínico-patológica en casos fatales de dengue en Maracaibo, Venezuela.

INTRODUCTION: Given the importance of dengue in America, it is indispensable to know the cause of death of the infected people and to evaluate the few necropsy studies available. OBJECTIVE: To describe and to analyze the relevant clinical and pathological findings in fatal dengue cases of dengue in a Venezuelan endemic area. METHODS: Eight fatal cases, according to clinical and epidemiological dengue criteria and/or confirmed by complete serological tests were studied after complete clinical necropsy. The tissues were processed by standard histopathological techniques. RESULTS: All these cases showed severe lung disease (diffuse alveolar damage, non cardiogenic pulmonary edema, thromboembolism, bronchopneumonia, pneumonitis, intralveolar hemorrhage). Six presented with pleural or abdominal effusion. Focal hepatic necrosis was found in two cases. The cause of death was related to respiratory failure in six (6) cases secondary to lung disease; two with hypovolemic shock, and one developed liver failure. CONCLUSION: the studied dengue cases showed fatal severe pulmonary compromise leading to death, unlike those reported in other studies of autopsies in The Americas. They also developed multiple organ failure, which in most cases led to death not directly associated to hypovolemic shock. These findings in autopsies will allow designing therapeutic strategies to avoid mortality.

Opiniones de las enfermeras con respecto al morir, la muerte y las acciones de enfermería frente al paciente moribundo adulto / Nurses opinion regarding to death: death and nursing actions in front of dying adult patient

El objetivo de esta investigación, es describir las opiniones de las enfermeras en relación con el morir, la muerte y las acciones de enfermería frente al paciente moribundo adulto. Se encuestó a 57 enfermeras que se desempeñan en los cinco servicios del Hospital Clínico de la Pontificia Universidad Católica de Chile, en que se presentó el mayor número de defunciones durante el año 2000. Para la recolección de los datos se aplicó el "Cuestionario de medición de actitudes de las enfermeras frente al paciente moribundo adulto" creado y validado por Urrutia en 1982, para registrar las opiniones de las enfermeras frente al morir, la muerte y el cuidado de enfermería a personas moribundas