Tratamiento inmunosupresor en pulsos en esclerosis múltiple durante el desescalado de la epidemia por SARS-CoV-2. Algoritmo de seguridad / Pulse immunosuppressive therapy for multiple sclerosis during the SARS-CoV-2 lockdown de-escalation plan: Safety algorithm

INTRODUCCIÓN: La pandemia por SARS-CoV-2 está condicionando los abordajes diagnósticos, terapéuticos y asistenciales establecidos en esclerosis múltiple (EM). Durante las fases inicial y pico de la epidemia, los fármacos modificadores del curso de la EM caracterizados por ser inmunosupresores administrados en pulsos (TIP), vieron pospuesta su administración debido a la incertidumbre sobre su influencia en la infección, principalmente en contagiados/contagiosos asintomáticos/presintomáticos. El objetivo de este trabajo es presentar un algoritmo basado en criterios de seguridad que permita reanudar los TIP durante la fase de desescalado. MÉTODOS: Se elabora un algoritmo, cuya estructura se sustenta en la experiencia clínica en EM de los autores y en una revisión bibliográfica del conocimiento acumulado, que facilita la detección de contagiosos asintomáticos, presintomáticos o con síntomas leves de SARS-CoV-2, con el objetivo de evitar la administración de TIP y contagios por contacto prolongado en hospital de día (HdD). RESULTADOS: Algoritmo con doble filtro clínico-microbiológico consistente en la aplicación telemática de un listado de comprobación de síntomas y después realización de PCR para SARS-CoV-2 en exudado nasofaríngeo, a las 48 y 24 h antes del TIP programado respectivamente. CONCLUSIÓN: Considerando el balance beneficio-riesgo, la aplicación del algoritmo resultaría ventajosa pese a que no se conoce la proporción real de asintomáticos/presintomáticos contagiosos. La realización sistemática de PCR, como test con mayor sensibilidad en la fase presintomática de la infección, en combinación con un sistema de detección precoz de síntomas, reduciría contagios y favorecería la identificación de pacientes con riesgo antes de su exposición a TIP

INTRODUCTION: The COVID-19 pandemic is changing approaches to diagnosis, treatment, and care provision in multiple sclerosis (MS). During both the initial and peak phases of the epidemic, the administration of disease-modifying drugs, typically immunosuppressants administered in pulses, was suspended due to the uncertainty about their impact on SARS-CoV-2 infection, mainly in contagious asymptomatic/presymptomatic patients. The purpose of this study is to present a safety algorithm enabling patients to resume pulse immunosuppressive therapy (PIT) during the easing of lockdown measures. METHODS: We developed a safety algorithm based on our clinical experience with MS and the available published evidence; the algorithm assists in the detection of contagious asymptomatic/presymptomatic cases and of patients with mild symptoms of SARS-CoV-2 infection with a view to withdrawing PIT in these patients and preventing new infections at day hospitals. RESULTS: We developed a clinical/microbiological screening algorithm consisting of a symptom checklist, applied during a teleconsultation 48hours before the scheduled session of PIT, and PCR testing for SARS-CoV-2 in nasopharyngeal exudate 24hours before the procedure. CONCLUSION: The application of our safety algorithm presents a favourable risk-benefit ratio despite the fact that the actual proportion of asymptomatic and presymptomatic individuals is unknown. Systematic PCR testing, which provides the highest sensitivity for detecting presymptomatic cases, combined with early detection of symptoms of SARS-CoV-2 infection may reduce infections and improve detection of high-risk patients before they receive PIT

Pulse immunosuppressive therapy for multiple sclerosis during the SARS-CoV-2 lockdown de-escalation plan: Safety algorithm. / Tratamiento inmunosupresor en pulsos en esclerosis múltiple durante el desescalado de la epidemia por SARS-CoV-2. Algoritmo de seguridad.

INTRODUCTION: The COVID-19 pandemic is changing approaches to diagnosis, treatment, and care provision in multiple sclerosis (MS). During both the initial and peak phases of the epidemic, the administration of disease-modifying drugs, typically immunosuppressants administered in pulses, was suspended due to the uncertainty about their impact on SARS-CoV-2 infection, mainly in contagious asymptomatic/presymptomatic patients. The purpose of this study is to present a safety algorithm enabling patients to resume pulse immunosuppressive therapy (PIT) during the easing of lockdown measures. METHODS: We developed a safety algorithm based on our clinical experience with MS and the available published evidence; the algorithm assists in the detection of contagious asymptomatic/presymptomatic cases and of patients with mild symptoms of SARS-CoV-2 infection with a view to withdrawing PIT in these patients and preventing new infections at day hospitals. RESULTS: We developed a clinical/microbiological screening algorithm consisting of a symptom checklist, applied during a teleconsultation 48hours before the scheduled session of PIT, and PCR testing for SARS-CoV-2 in nasopharyngeal exudate 24hours before the procedure. CONCLUSION: The application of our safety algorithm presents a favourable risk-benefit ratio despite the fact that the actual proportion of asymptomatic and presymptomatic individuals is unknown. Systematic PCR testing, which provides the highest sensitivity for detecting presymptomatic cases, combined with early detection of symptoms of SARS-CoV-2 infection may reduce infections and improve detection of high-risk patients before they receive PIT.

[Antibiotic diffusion to central nervous system]. / Difusión de los antibióticos en el sistema nervioso central.

Central nervous system (CNS) infections caused by pathogens with a reduced sensitivity to drugs are a therapeutic challenge. Transport of fluid and solutes is tightly controlled within CNS, where vasculature exhibits a blood-brain barrier (BBB).The entry of drugs, including antibiotics, into the cerebro-spinal fluid (CSF) is governed by molecular size, lipophilicity, plasma protein binding and their affinity to transport systems at the BBB. The ratio of the AUCCSF (Area under the curve in CSF)/AUCS (Area under the curve in serum) is the most accurate parameter to characterize drug penetration into the CSF. Linezolid, some fluoroquinolones and metronidazole get high CSF concentrations and are useful for treating susceptible pathogens. Some highly active antibiotic compounds with low BBB permeability can be directly administered into the ventricles together with concomitant intravenous therapy. The ideal antibiotic to treat CNS infections should be that with a small moderately lipophilic molecule, low plasma protein binding and low affinity to efflux pumps at BBB. Knowledge of the pharmacokinetics and pharmacodynamics of antibiotics at the BBB will assist to optimize antibiotic treatment in CNS infections. This article reviews the physicochemical properties of the main groups of antibiotics to assess which compounds are most promising for the treatment of CNS infections and how to use them in the daily clinical practice.

[Progressive encephalitis due to anti-DPPX antibodies: a case with good response to treatment with rituximab]. / Encefalitis progresiva por anticuerpos anti-DPPX: un caso con buena respuesta al tratamiento con rituximab.

TITLE: Encefalitis progresiva por anticuerpos anti-DPPX: un caso con buena respuesta al tratamiento con rituximab.