Design, Synthesis, and Evaluation of a Novel Conjugate Molecule with Dopaminergic and Neuroprotective Activities for Parkinson's Disease.

The escalating prevalence of Parkinson's disease (PD) underscores the need for innovative therapeutic interventions since current palliative measures, including the standard l-Dopa formulations, face challenges of tolerance and side effects while failing to address the underlying neurodegenerative processes. Here, we introduce DAD9, a novel conjugate molecule that aims to combine symptomatic relief with disease-modifying strategies for PD. Crafted through knowledge-guided chemistry, the molecule combines a nonantibiotic doxycycline derivative with dopamine, preserving neuroprotective attributes while maintaining dopaminergic agonism. This compound exhibited no off-target effects on PD-relevant cell functions and sustained antioxidant and anti-inflammatory properties of the tetracycline precursor. Furthermore, it effectively interfered with the formation and seeding of toxic α-synuclein aggregates without producing detrimental oxidative species. In addition, DAD9 was able to activate dopamine receptors, and docking simulations shed light onto the molecular details of this interaction. These findings position DAD9 as a potential neuroprotective dopaminergic agonist, promising advancements in PD therapeutics.

Self-Report of the perception of stress and signs of bruxism generated during the pandemic in student of the health area / Autoinforme de la percepción de estrés y signos de bruxismo derivados de la pandemia en estudiantes del área de la salud

Abstract Bruxism is the repetitive muscle-mandibular behavior characterized by clenching and/or grinding of the teeth, which reflects the presence of one or more underlying conditions or factors. The objective of this descriptive study was to determine the association between bruxism and stress self-perceived during the pandemic, as well as their frequency by gender and academic area. An interrogation and self-perceived stress scale PSS-14 were applied to students from the different areas of the Institute of Health Sciences (ICSa) to determine the presence or absence of stress and bruxism symptom, a Chi-square was used for the comparison between variables, considering a value of p0.005. ICSa students between 18 and 24 age perceive symptoms of bruxism and high levels of stress caused during the pandemic.

Resumen El bruxismo es el comportamiento músculo-mandibular repetitivo caracterizado por apretamiento y/o rechinamiento de los dientes, que refleja la presencia de una o varias condiciones o factores subyacentes. Se realizó un estudio descriptivo con el objetivo de determinar la asociación del nivel de estrés y síntomas de bruxismo autopercibidos durante la pandemia, así como su frecuencia por género y área académica. Se aplicó un interrogatorio y escala de estrés percibido PSS-14 a los estudiantes de las distintas áreas del Instituto de Ciencias de la Salud (ICSa) para determinar la presencia o ausencia de estrés y síntomas de bruxismo, se utilizó una Chi-cuadrada para la comparación entre variables, considerando significativo un valor de p0.0001. Los estudiantes de 18 a 24 años de edad del ICSa perciben síntomas de bruxismo y altos niveles de estrés originados durante la pandemia.

Caracterización clínico-epidemiológica de pacientes con carcinoma basocelular pertenecientes al área norte de Ciego de Ávila

Introducción: El carcinoma basocelular es el tumor maligno más frecuente, representa aproximadamente entre el 75 y 80 % de todos los cánceres cutáneos no melanoma en la raza blanca. En el área norte de la provincia de Ciego de Ávila no se encuentran estudios sobre este tema. Objetivo: Caracterizar clínica y epidemiológicamente a los pacientes con carcinoma basocelular atendidos en el servicio de Cirugía Maxilofacial del Hospital Provincial Docente "Roberto Rodríguez Fernández" del municipio Morón en la provincia Ciego de Ávila, Cuba, en el período comprendido de enero de 2019 a enero de 2020. Método: Se realizó un estudio observacional descriptivo de corte transversal en 118 pacientes con dicho diagnóstico, donde se estudió: edad, sexo, localización anatómica del tumor, factores predisponentes, formas clínicas de presentación del tumor y estadio clínico. Resultados: Predominó el sexo masculino (60,2 %) y el grupo etario 60-74 años (51,7 %). El 44,1 % del total presentó la forma clínica nodular, con una mayor incidencia en la región nasal 39,8 %. El 97 % de los casos tenía como factor predisponente piel blanca o rosada. La población estudiada se encontró mayormente en estadio clínico II (43,2 %). Conclusiones: Los antecedentes patológicos familiares, exposición solar y piel blanca o rosada influyen marcadamente en la aparición del carcinoma basocelular, lo que permite un adecuado diagnóstico de la enfermedad, así como el desarrollo de actividades de promoción y prevención de salud de estos factores predisponentes.

Introduction: Basal cell carcinoma is the most common malignant tumor, which accounts for approximately 75 or 80 % of all non-melanoma skin cancer in whites. Studies concerning this issue at the northern care area of Ciego de Avila are lacked. Objective: To characterize clinically and epidemiologically all patients with basal cell carcinoma attended in the maxillofacial surgery service at the Hospital Provincial Docente "Roberto Rodríguez Fernández", Morón, Ciego de Ávila, Cuba, from January 2019 to January 2020. Method: A cross-sectional descriptive observational study was conducted in 118 patients with this diagnosis, where the variables studied were as follow: age, sex, the anatomical location of tumor, predisposing factors, clinical forms of tumor and its clinical stage. Results: Male sex (60.2%) and age group 60-74 years (51.7%) were predominant. Nodular clinical form was present in 44.1% of the total, with a higher incidence in the nasal region (39.8%). The predisposing factor in 97% of the cases was white or pink skin. The population studied was mostly in clinical stage II (43.2%). Conclusions: Family pathological history, sun exposure and white or pink skin have a marked influence on the appearance of basal cell carcinoma, which allows an adequate diagnosis of the disease, as well as the development of health promotion and prevention activities for these predisposing factors.

Introdução: O carcinoma basocelular é o tumor maligno mais comum, representando aproximadamente 75-80% de todos os cânceres de pele não melanoma na raça branca. Na zona norte da província de Ciego de Ávila não existem estudos sobre este assunto. Objetivo: Caracterizar clínica e epidemiologicamente os pacientes com carcinoma basocelular atendidos no serviço de Cirurgia Bucomaxilofacial do Hospital Provincial Docente "Roberto Rodríguez Fernández" do município de Morón, província de Ciego de Ávila, Cuba, no período de janeiro de 2019 a janeiro de 2020. Método: Foi realizado um estudo observacional descritivo transversal em 118 pacientes com esse diagnóstico, onde foram estudados idade, sexo, localização anatômica do tumor, fatores predisponentes, formas clínicas de apresentação do tumor e estágio clínico. Resultados: Predominou o sexo masculino (60,2%) e a faixa etária de 60 a 74 anos (51,7%). 44,1% do total apresentaram a forma clínica nodular, com maior incidência na região nasal 39,8%. 97% dos casos tinham a pele branca ou rosada como fator predisponente. A população estudada encontrava-se em sua maioria no estágio clínico II (43,2%). Conclusões: A história patológica familiar, a exposição solar e a pele branca ou rosada têm uma influência marcante no aparecimento do carcinoma basocelular, o que permite um diagnóstico adequado da doença, bem como o desenvolvimento de ações de promoção da saúde e prevenção desses fatores predisponentes.

Neuroprotective Effects of a Novel Demeclocycline Derivative Lacking Antibiotic Activity: From a Hit to a Promising Lead Compound.

The antibiotic tetracycline demeclocycline (DMC) was recently reported to rescue α-synuclein (α-Syn) fibril-induced pathology. However, the antimicrobial activity of DMC precludes its potential use in long-term neuroprotective treatments. Here, we synthesized a doubly reduced DMC (DDMC) derivative with residual antibiotic activity and improved neuroprotective effects. The molecule was obtained by removal the dimethylamino substituent at position 4 and the reduction of the hydroxyl group at position 12a on ring A of DMC. The modifications strongly diminished its antibiotic activity against Gram-positive and Gram-negative bacteria. Moreover, this compound preserved the low toxicity of DMC in dopaminergic cell lines while improving its ability to interfere with α-Syn amyloid-like aggregation, showing the highest effectiveness of all tetracyclines tested. Likewise, DDMC demonstrated the ability to reduce seeding induced by the exogenous addition of α-Syn preformed fibrils (α-SynPFF) in biophysical assays and in a SH-SY5Y-α-Syn-tRFP cell model. In addition, DDMC rendered α-SynPFF less inflammogenic. Our results suggest that DDMC may be a promising drug candidate for hit-to-lead development and preclinical studies in Parkinson's disease and other synucleinopathies.

Humoral immunoresponse elicited against an adenoviral-based SARS-CoV-2 coronavirus vaccine in elderly patients.

The early sequencing of the SARS-CoV-2 viral genome allowed for a speedy development of effective vaccines against the virus. Nevertheless, age-related immunosenescence, the inability to mount strong immune responses, still represents a major obstacle. Here, in a group of 149 elderly volunteers (70-96 years old), evolution of the humoral immune response over time to Gam-COVID-Vac (Sputnik V), a vaccine based on heterologous recombinant adenovirus-26 (Ad26) and adenovirus-5 (Ad5) carrying the Spike genome, was analyzed by an anti-RBD ELISA. At 28 days post vaccination (dpv), a seroconversion rate of 91% was achieved, showing the importance of administering at least two doses of Gam-COVID-Vac to elicit a robust immune response, especially in elderly individuals without previous SARS-CoV-2 infection. Interestingly, IgG specific antibodies that reached their highest titers around 28 dpv (median = 740), persisted without significant decrease after 60 dpv (median = 650). After 90 dpv, IgG titers began to drop, and at 180 dpv only 44.7% of the elderly individuals remained with detectable anti-RBD IgG antibodies. No significant differences were observed in specific humoral immune responses between genders at early times point. However, at 60 dpv anti-RBD titers were more persistent in elderly females, and only dropped at 90 dpv (p < 0.0001). As expected, the highest antibodies titers were elicited in the youngest subgroup (70-74 years). Our results show that Gam-COVID-Vac was able to deal with the ageing of the immune system, eliciting a robust immune response in an elderly cohort, which lasted approximately 90 dpv at high levels, and protected against COVID-19.

Antibacterial activity of biosynthesized silver nanoparticles (AgNps) against Pectobacterium carotovorum.

In a bioprospecting study of paramo soils cultivated with potato (Solanum tuberosum), 50 fungal isolates were obtained and evaluated for their nitrate reductase (NR) activity, given the role played by this enzyme in the biosynthesis of silver nanoparticles (AgNps). Five isolates strain with high NR activity belonging to Penicillium simplicissimum, Aspergillus niger, and Fusarium oxysporum species were selected, verifying the presence of the NR enzyme in their enzymatic extract. Later, these strains showed the ability to biosynthesize AgNps with distorted spherical shapes and sizes ranging from 15 to 45 nm. Subsequently, an antibiosis test was carried out by the agar diffusion method using glass fiber disks against the phytopathogenic agent Pectobacterium carotovorum, finding halos of inhibition of bacterial growth up to 15.3 mm using a 100 ppm solution of the AgNps obtained from F. oxysporum. These results contribute to generating the basis of a new alternative for the control of this phytopathogenic agent of potato, challenging to manage by traditional methods and of relevance at the post-harvest level.

Programa de curso optativo sobre atención estomatológica integral en pacientes con trastornos de la coagulación / Elective course program on comprehensive dental care in patients with bleeding disorders

RESUMEN Introducción : Los trastornos de la coagulación surgen como consecuencia de un grupo de alteraciones que se desencadenan durante el proceso de coagulación, de ahí la necesidad que se impone en la capacitación profesional del estomatólogo para establecer una adecuada atención a los pacientes que comprenden este grupo poblacional. Objetivo : Elaborar un programa de curso optativo sobre atención estomatológica integral en pacientes con trastornos de la coagulación. Material y Métodos : Se realizó un estudio cualitativo y descriptivo, en la Facultad de Ciencias Médicas de Morón, Ciego de Ávila, Cuba, durante los meses de marzo a abril del 2021. Se utilizaron métodos teóricos y empíricos, efectuándose un análisis de los documentos de los planes de estudio de la especialidad de Estomatología para la elaboración del programa. Resultados : El curso propuesto quedó estructurado en 60 horas, durante siete semanas, presencial y distribuido en cinco temas, posibilitando la formación general de los alumnos del pregrado de Estomatología, mediante el desarrollo de habilidades teóricas y asistenciales. Conclusiones : se elaboró un programa de curso optativo que favorece al potenciamiento de las acciones curriculares, contribuyendo al desarrollo docente-asistencial en los estudiantes del pregrado de Estomatología.

ABSTRACT Introduction : Coagulation disorders arise as a consequence of a group of alterations that are triggered during the coagulation process, hence the need imposed on the professional training of the dentist to establish adequate care for patients who comprise this population group. Objective : to develop an elective course program on comprehensive dental care in patients with coagulation disorders. Material and Methods : A qualitative and descriptive study was carried out at the Faculty of Medical Sciences of Moron, Ciego de Avila, Cuba, during the months of March to April 2021. Theoretical and empirical methods were used, carrying out an analysis of the documents of the study plans of the Stomatology specialty for the elaboration of the program. Results : the proposed course was structured in 60 hours, for seven weeks, face-to-face and divided into five topics, enabling the general training of Stomatology undergraduate students, through the development of theoretical and care skills. Conclusions : an elective course program was developed that favors the enhancement of curricular actions, contributing to the teaching-care development of Stomatology undergraduate students.

Características maternas relacionadas con el abandono de la lactancia materna exclusiva

RESUMEN Introducción: Existe un renovado interés por rescatar la cultura del amamantamiento, basado en los beneficios que confiere esta práctica. La identificación de características maternas que influyen en su abandono permite desarrollar actividades de promoción encaminadas a fomentarla. Objetivo: Describir las características maternas relacionadas con el abandono de la lactancia materna exclusiva. Métodos: Estudio observacional, descriptivo de corte transversal en 86 madres de niños de 6 a 12 meses de nacidos, durante el año 2020. Se analizaron las variables: características sociodemográficas, abandono de la lactancia materna exclusiva, motivo de abandono, morbilidades de los lactantes y nivel de conocimientos sobre los beneficios de la lactancia materna exclusiva. Resultados: El 48,8 % de las madres se encontraban en unión consensual, el 55,8 % eran trabajadoras y predominó el nivel de escolaridad preuniversitario (50 %). El 36,0 % de las madres abandonaron la lactancia materna exclusiva; de ellas el 11,6 % tenía entre 14 y 19 años. El 54,8 % refirió abandonar esta práctica porque el lactante no se llenaba. Las enfermedades respiratorias fueron las más observadas en quienes no recibieron leche materna (16,3 %). El 50 % de las madres poseían un nivel de conocimiento inadecuado sobre los beneficios de esta práctica. Conclusiones: La mayoría de las madres no abandonan la lactancia, trabajan, se encuentran en unión consensual, con nivel escolar preuniversitario y conocimientos inadecuados sobre los beneficios de la lactancia materna.

ABSTRACT Introduction: There is a renewed interest in rescuing the culture of breastfeeding based on the benefits that this practice confers. The identification of maternal characteristics that influence their abandonment makes it possible to develop promotional activities aimed at fostering it. Objective: To describe the maternal characteristics that influence the abandonment of exclusive breastfeeding. Methods: Observational, descriptive cross-sectional study in 86 mothers of children between 6 and 12 months born during the year 2020, belonging to the Teaching Polyclinic "7 de Noviembre". The variables analyzed were: sociodemographic characteristics, abandonment of exclusive breastfeeding, reason for abandonment, infant morbidities, and level of knowledge about the benefits of exclusive breastfeeding. Results: The 48,8 % of the mothers were in a consensual union, 55,8 % were workers, and the pre-university level of schooling prevailed (50 %). 36,0 % of the mothers abandoned exclusive breastfeeding; 11,6 % of them were between 14-19 years old. The 54,8 % reported abandoning this practice because the infant did not fill up. Respiratory diseases were the most observed in those who did not receive breastfeed (16,3 %); 50 % of the mothers had an inadequate level of knowledge about the benefits of this practice. Conclusions: Most of the mothers did not abandon breastfeeding, they work, are in a consensual union, with a pre-university school level and with inadequate knowledge about the benefits of breastfeeding.

Long-term analysis of antibodies elicited by SPUTNIK V: A prospective cohort study in Tucumán, Argentina.

BACKGROUND: Gam-COVID-Vac (SPUTNIK V) has been granted emergency use authorization in 70 nations and has been administered to millions worldwide. However, there are very few peer-reviewed studies describing its effects. Independent reports regarding safety and effectiveness could accelerate the final approval by the WHO. We aimed to study the long-term humoral immune response in naïve and previously infected volunteers who received SPUTNIK V. METHODS: Humoral immune responses, assayed by anti-SARS-CoV-2-spike-RBD IgG ELISA and neutralization assays, were measured in 602 healthcare workers at 0, 14, 28, 60 and 180 days after receiving SPUTNIK V between December 2020 and July 2021 in Tucumán, Argentina. FINDINGS: Seroconversion was detected in 97% of individuals after 28 days post-vaccination (dpv) (N = 405). Anti-RBD titers began to decrease after 60 dpv (N = 328), but remained detectable in 94% at 90 dpv (N = 224). At 180 dpv, anti-RDB titers persisted in 31% (N = 146). Previous infection triggered an increased immune response to the first dose and increased neutralization activity against variants of concern (VOC). Second doses in previously infected individuals further increased titers, even 90 dpv (N = 75). Basal antibody titers had more influence on post-vaccination anti-RBD responses than the time elapsed between diagnosis and vaccination (N = 274). INTERPRETATION: Data presented herein provides essential knowledge regarding the kinetics of antibodies induced by SPUTNIK V up to six months after immunization, and suggests that when considering one-dose vaccination policies for individuals with previous SARS-CoV-2 infection, serological studies to determine basal titers may be important, independent of when diagnosis occurred. FUNDING: Tucumán Public Health System (SIPROSA), Argentinean National Research Council (CONICET), National University of Tucumán (UNT).

Características sociodemográficas que influyen en el embarazo en la adolescencia / Sociodemographic characteristics that influence pregnancy in adolescence

Introducción: el embarazo en la adolescencia constituye un alarmante problema de salud; describir las características que influyen en su aparición permite desarrollar actividades de promoción de salud encaminadas a mejorar dicha situación. Objetivo: describir las características sociodemográficas que influyen el embarazo en la adolescencia. Métodos: estudio observacional, descriptivo, de corte transversal en gestantes adolescentes pertenecientes al Policlínico Docente "7 de noviembre" del municipio Majibacoa durante el año 2020. El universo estuvo constituido por 34 gestantes adolescentes; se trabajó con la totalidad de estas. Se analizaron las variables: edad materna, características sociodemográficas, factores de riesgo familiares, factores de riesgo sociales y económicos y deserción escolar. Resultados: el 55,9% de las gestantes tenía entre 18 y 19 años. El 47% tenían nivel preuniversitario, el 52,9% eran estudiantes; el 67,6% se encontraban en unión y la mayoría tuvo su primera relación sexual después de los 14 años (58,8%). El 32,4% de las gestantes adolescentes eran hijas de madres con algún embarazo en la adolescencia. Se observó con mayor preponderancia el per cápita familiar bajo como factor de riesgo socioeconómico (43,8%). El 58,8% abandonaron sus estudios. Conclusiones: el inicio precoz de las relaciones sexuales, el antecedente de madres con embarazos en la adolescencia, el per cápita familiar bajo favorecen la aparición de una gestación en la adolescencia, donde la mayoría de las veces estas deciden abandonar sus estudios.

Introduction: teenage pregnancy constitutes an alarming health problem; Describing the characteristics that influence its appearance allows the development of health promotion activities aimed at improving this situation. Objective: to describe the sociodemographic characteristics that influence pregnancy in adolescence. Methods:observational, descriptive, cross-sectional study in pregnant teenagers belonging to the Teaching Polyclinic "7 de Noviembre" of the Majibacoa municipality during the year 2020. The universe consisted of 34 pregnant teenagers; all of these were worked on. The variables were analyzed: maternal age, sociodemographic characteristics, family risk factors, social and economic risk factors, and school dropout. Results: 55,9% of the pregnant women were between 18 and 19 years old. 47% had a pre-university level, 52,9% were students; 67,6% were in union and the majority had their first sexual intercourse after the age of 14 (58,8%). 32,4% of the adolescent pregnant women were the daughters of mothers with some pregnancy in adolescence. Low family per capita is exhibited with greater preponderance as a socio-economic risk factor (43,8%). 58,8% dropped out of their studies. Conclusions: the early initiation of sexual relations, the antecedent of mothers with teenage pregnancies, the low family per capita favor the appearance of a pregnancy in adolescence, where most of the time they decide to abandon their studies

Elevated Humoral Immune Response to SARS-CoV-2 at High Altitudes Revealed by an Anti-RBD "In-House" ELISA.

The severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) has caused a global pandemic with dramatic health and socioeconomic consequences. The Coronavirus Disease 2019 (COVID-19) challenges health systems to quickly respond by developing new diagnostic strategies that contribute to identify infected individuals, monitor infections, perform contact-tracing, and limit the spread of the virus. In this brief report, we developed a highly sensitive, specific, and precise "In-House" ELISA to correctly discriminate previously SARS-CoV-2-infected and non-infected individuals and study population seroprevalence. Among 758 individuals evaluated for anti-SARS-CoV-2 serology in the province of Tucumán, Argentina, we found a weak correlation between antibodies elicited against the RBD, the receptor-binding domain of the Spike protein, and the nucleocapsid (N) antigens of this virus. Additionally, we detected mild levels of anti-RBD IgG antibodies in 33.6% of individuals diagnosed with COVID-19, while only 19% showed sufficient antibody titers to be considered as plasma donors. No differences in IgG anti-RBD titers were found between women and men, neither in between different age groups ranging from 18 to 60. Surprisingly, individuals from a high altitude village displayed elevated and longer lasting anti-RBD titers compared to those from a lower altitude city. To our knowledge, this is the first report correlating altitude with increased humoral immune response against SARS-CoV-2 infection.

Enfermedad de Rosai-Dorfman primaria ósea

La enfermedad de Rosai-Dorfman es una patología poco común que suele presentarse con adenopatías cervicales indoloras. El compromiso óseo como presentación extraganglionar es aún menos frecuente. Se presenta el caso de una mujer de 38 años con 3 meses de dolor y limitación funcional en miembro inferior derecho. La radiografía simple y tomografía computarizada mostraron la presencia de una lesión ósea lítica en la metáfisis y epífisis distal del fémur derecho. Finalmente, el estudio histopatológico e inmunohistoquímico de la lesión determinó que se trataba de un caso de enfermedad de Rosai-Dorfman primaria ósea.

Rosai-Dorfman disease is a rare pathology that usually presents as painless cervical adenopathies. Bone compromise as an extra nodal presentation is even more uncommon. We present the case of a 38 years old woman with a 3 months history of pain and functional limitation of her right lower limb. X-ray and CT images showed a lytic bone lession at the distal metaphysis and epiphysis on her right femur. Histological and immunohistochemical study of the lession determined that it was a case of Rosai-Dorfman disease with bone involvement.

Caracterización de mujeres en trabajo de parto a las que se les aplicó Maniobra Kristeller / Characterization of women in labor to whom the Kristeller Maneuver was applied

Introducción: en la obstetricia se realizan algunas prácticas que producen daños significativos a la madre o a su bebé, aunque no siempre se admite su ejecución. Un ejemplo es la maniobra de Kristeller, cuya aplicación es controvertida. Objetivo: determinar la frecuencia con que se realizó la maniobra de Kristeller en una muestra de mujeres atendidas en la maternidad del Hospital San Felipe de Tegucigalpa. Metodología: estudio descriptivo, que se realizó en el período comprendido entre los meses de marzo a mayo del 2018. Se incluyeron un total de 376 pacientes. Las variables estudiadas fueron: hora del parto, paridad, profesional que atendió y supervisó el parto, profesional que realizó la maniobra de Kristeller, complicaciones maternas y neonatales observadas. Resultados: se encontró una frecuencia de maniobra de Kristeller de 12.2 % (46/376). Conclusiones: ser primigesta incrementó el riesgo de que se le aplicara la maniobra Kristeller (OR: 3.11, IC:95%, p=0.0002), dentro de los factores protectores se encontraron ser multípara (OR:0.25, IC:95%, p=0.00004) y, haber sido atendida por una licenciada en enfermería (OR: 0.34, IC:95%, p=0.0097). La maniobra de Kristeller aumentó el riesgo de complicaciones maternas en 12.5 veces (OR: 17.6, IC:95%, p=0.0000000019) y 6.5 veces en el neonato (OR: 7.7 IC:95%, p=0.0000578)...(AU)

Tratamiento profiláctico en extracciones dentarias con la terapia floral de bach (crab apple) / Prophylactic treatment in tooth extractions with bach flower therapy (crab apple)

Introducción: La terapia floral de Bach es una terapia medicamentosa no farmacológica que brinda un conjunto de remedios vibracionales; es un remedio de limpieza por excelencia, se le considera el antibiótico de elección del citado sistema floral. Objetivo: caracterizar a los pacientes atendidos en el Servicio de Estomatología de la Facultad de Ciencias Médicas de Morón tarados con Terapia Floral de Bach (Crab Apple), como profilaxis en extracciones dentarias. Método: se realizó un estudio experimental (cuasi experimento), para el mismo se crearon dos grupos uno experimental y otro control en el período comprendido de Junio 2019 a Enero de 2020. La población la constituyó 370 pacientes que acudieron al Servicio de Estomatología de la Facultad de Ciencias Médicas "Arley Hernández Moreira" para realizarse extracciones dentarias; la muestra se seleccionó utilizando el método probabilístico aleatorio simple la cual quedó conformada por 260 pacientes. Resultados: la respuesta preoperatoria del 100 % de los pacientes del grupo experimental fue satisfactoria, el 9,5 % perteneciente al grupo control fue no satisfactoria. El 100 % de los pacientes del grupo experimental y el 89,1 % del grupo control durante el transoperatorio presentaron respuesta satisfactoria. Durante el posoperatorio solo el 2,5% del grupo experimental alcanzó resultados no satisfactorios y en el grupo control el 9,4 %. Conclusiones: El estudio mostro la efectividad de la terapia floral de Bach como profilaxis ante la extracción dentaria presentando un menor número de complicaciones y respondiendo con mayor efectividad su uso durante el posoperatorio el transoperatorio y el posoperatorio.

Experiencia de la aplicación de homeopatía contra el tabaquismo / Experience of the application of homeopathy against smoking

Existen diferentes procedimientos para tratar la dependencia a la nicotina, y, entre los no conductuales se incluye la Terapia Homeopática, que utiliza sustancias de origen animal, vegetal o mineral diluidas en alcohol capaces de curar diferentes patologías a un individuo enfermo prestando una información que pone en funcionamiento los mecanismos autocurativos del organismo.

CMT-3 targets different α-synuclein aggregates mitigating their toxic and inflammogenic effects.

Parkinson's disease (PD) is a neurodegenerative disorder for which only symptomatic treatments are available. Repurposing drugs that target α-synuclein aggregation, considered one of the main drivers of PD progression, could accelerate the development of disease-modifying therapies. In this work, we focused on chemically modified tetracycline 3 (CMT-3), a derivative with reduced antibiotic activity that crosses the blood-brain barrier and is pharmacologically safe. We found that CMT-3 inhibited α-synuclein amyloid aggregation and led to the formation of non-toxic molecular species, unlike minocycline. Furthermore, CMT-3 disassembled preformed α-synuclein amyloid fibrils into smaller fragments that were unable to seed in subsequent aggregation reactions. Most interestingly, disaggregated species were non-toxic and less inflammogenic on brain microglial cells. Finally, we modelled the interactions between CMT-3 and α-synuclein aggregates by molecular simulations. In this way, we propose a mechanism for fibril disassembly. Our results place CMT-3 as a potential disease modifier for PD and possibly other synucleinopathies.

Fístula bronquioesofágica asociada a reflujo gastroesofágico / Bronchial-esophageal fistula associated with gastroesophageal reflux

Se presenta un caso clínico demostrativo de fistula broncoesofágica asociado a reflujo gastroesofágico en un varón de 76 años con diagnóstico de reflujo gastroesofágico y hernia hiatal, que acude por episodios de tos de 1 año de evolución sin respuesta a tratamientos. Demostraremos la utilidad del estudio esofagográfico como elemento diagnóstico. Se revisa brevemente los aspectos clínicos, diagnósticos, terapéuticos y probable secuencia de desarrollo de esta complicación.

We present a clinical case of bronchoesophageal fistula associated with gastroesophageal reflux in a 76-year old man with a diagnosis of gastroesophageal reflux and hernia. He comes for episodes of cough of 1 year of evolution without response to treatments. We will demonstrate the usefulness of the esophagographic study as a diagnostic element. The clinical, diagnostic, therapeutic aspects and the probably sequence of development of this complication are briefly reviewed.

Migración intracraneal de aceite de silicona a través del nervio óptico post-vitrectomía / Intracranial migration of silicone oil through the optic nerve post-vitrectomy

La migración intracraneal del aceite de silicona intraocular es una complicación rara en el tratamiento de las complicaciones de la retinopatía diabética. Se han postulado varios posibles mecanismos etiopatogénicos para explicar este fenómeno de migración. El aceite de silicona se presenta hiperdenso en la tomografía, siendo un desafío distinguirlo de la hemorragia subaracnoidea, resaltando la utilidad de la resonancia magnética. En pacientes con evidencia de retinopexia de silicona previa, la visualización de una lesión intraventricular con un artefacto de desplazamiento químico asociado aumenta la posibilidad de que se trate de una migración del aceite de silicona. Presentamos el caso de un paciente con antecedente de retinopexia con aceite de silicona y cefalea intensa, identificándose migración del aceite de silicona al sistema ventricular con estudios de tomografía y resonancia.

The intracranial migration of intraocular silicone oil is a rare complication in the treatment of complications of diabetic retinopathy. Several possible etiopathogenic mechanisms have been published to explain this phenomenon of migration. Silicone oil appears hyperdense on tomography, being a challenge to distinguish it from subarachnoid hemorrhage, highlighting the usefulness of magnetic resonance imaging. In patients with evidence of previous silicone retinopexy, the visualization of an intraventricular lesion with a chemical displacement device presents the possibility that it is a migration of the silicone oil. To present the case of a patient with a history of retinopexy with silicone oil and intense headache, identifying the migration of silicone oil in the ventricular system with tomography and resonance studies.

Clasificación de Neer. Variabilidad interobservador / Interobserver Variability Of Neer Classification

Introducción Hacer objetiva la variabilidad interobservador al evaluar una fractura de húmero proximal utilizando la clasificación de Neer y establecer su utilidad diagnóstica y terapéutica. Materiales y Métodos Formulario digital con 20 casos elegidos al azar de fracturas de húmero proximal, de un mismo hospital entre 2010 y 2014. Cada caso incluyó: edad, sexo, lateralidad y dos proyecciones radiográficas. Evaluado de forma anónima por Traumatólogos, con y sin práctica habitual en cirugía del hombro, de hospitales nacionales e internacionales, indicando estadío de Neer y opción terapéutica adecuada. Se estableció la variabilidad interobservador entre grupos y comparando a todos por igual, calculando el índice de Kappa de Fleiss e interpretándolo según los criterios de Landis y Koch. Resultados 40 respuestas de Traumatólogos, 15 con práctica habitual de cirugía de hombro y 25 no. El índice Kappa de Fleiss medio fue 0,173 en el grupo de Traumatólogos con práctica habitual en cirugía de hombro. Siendo 0,176 en el grupo sin práctica habitual. Al evaluarlos conjuntamente, 0,184. Existe gran variabilidad interobservador en la indicación terapéutica y dentro de la indicación quirúrgica. Discusión El grado de acuerdo obtenido, según los criterios de Landis y Koch, ha sido pobre en todos los grupos en lo que a estadío se refiere y débil en lo referente al tratamiento, no influyendo la experiencia del Traumatólogo. Sería necesaria una clasificación más reproducible ya que la clasificación de Neer presenta la suficiente variabilidad interobservador como para aceptarla como único medio en la toma de decisiones.

Background To study inter-observer variability by evaluating a fracture of the proximal humerus using Neer's classification and to establish its diagnostic and therapeutic utility. Methods A computerised form was used with 20 randomly selected cases of fractures of the proximal humerus, from the same hospital between 2010 and 2014. Each case included: age, gender, laterality, and two radiographic projections. They were anonymously evaluated by Traumatologists, for whom shoulder surgery was routine practice or not, from national and international hospitals. They indicated Neer stage and an appropriate therapeutic option. Interobserver variability was established between groups, and comparing all of them equally, calculating Fleap's Kappa index and interpreting it according to the Landis and Koch criteria. Results A total of 40 responses were obtained from the Traumatologists, 15 of them were shoulder surgery was usual practice and 25 where it was not. The mean Fleap Kappa index was 0.173 in the Traumatologists group were shoulder surgery was usual practice, being 0.176 in the group were it was not usual practice. The overall index was 0.184. There is wide interobserver variability in the therapeutic indication, as well as within the surgical indication. Discussion The level of agreement obtained, according to the criteria of Landis and Koch, was poor in all groups in terms of stage, and weak in terms of treatment. The experience of the Traumatologist had no influence. A more reproducible classification may be necessary since Neer's classification has sufficient interobserver variability to accept it as the sole means of decision making.