Encefalitis autoinmune posherpética. Caso clínico pediátrico / Autoimmune post-herpes simplex encephalitis. A pediatric clinical case report

La encefalitis por virus herpes simple (VHS) es una causa frecuente de encefalitis grave y potencialmente fatal. La encefalitis autoinmune posherpética (EAPH) afecta a un porcentaje de los pacientes que han presentado encefalitis herpética (EH) y se caracteriza por la aparición de nuevos síntomas neurológico/psiquiátricos, y/o por el empeoramiento de los déficits adquiridos durante la infección viral dentro de un lapso temporal predecible. Se produce por un mecanismo no relacionado con el VHS, sino por fenómenos autoinmunes, y es susceptible de tratamiento con inmunomoduladores. Se presenta el caso de un varón de 5 años de edad con EAPH que requirió tratamiento inmunomodulador, de primera y segunda línea, con buena evolución y remisión de los síntomas.

Herpes simplex virus (HSV) encephalitis is a common cause of severe and potentially fatal encephalitis. Autoimmune post-herpes simplex encephalitis (AIPHSE) affects a percentage of patients who developed herpes simplex encephalitis (HSE) and is characterized by the onset of new neurological/psychiatric symptoms and/or worsening of deficits acquired during the herpes infection within a predictable time frame. It is caused by a mechanism not related to HSV, but by autoimmune conditions, and is susceptible to treatment with immunomodulators. Here we describe the case of a 5-year-old boy with AIPHSE who required first- and second-line immunomodulatory treatment, with an adequate course and remission of symptoms.

De-escalating therapy in inflammatory bowel disease: Results from an observational study in clinical practice.

BACKGROUND AND OBJECTIVES: Combination therapy with an immunomodulator (IMM) and an anti-TNF is commonly recommended in Crohn's disease (CD) and ulcerative colitis (UC) patients. However, little is known about relapse rates after therapeutic de-escalation. This study aimed to evaluate the risk of relapse in a cohort of UC and CD patients with long-standing clinical remission after discontinuation of IMM or anti-TNF and to identify predictive factors for relapse. METHODS: This retrospective study included patients with UC or CD on combination therapy and clinical remission for at least 6 months. IMM or anti-TNF was stopped upon physician decision. Primary objective was to evaluate the relapse rates after discontinuation of IMM or anti-TNF and to analyze predictors of relapse. RESULTS: The study included 88 patients, 48 patients (54.5%) discontinued IMM and 40 (45.5%) anti-TNF. During follow-up, relapse rates were 16.7% and 52.5% in the IMM discontinuation group and anti-TNF discontinuation group, respectively (p<0.001). Multivariate analysis showed that anti-TNF discontinuation (HR=3.01; 95% CI=1.22-7.43) and ileal CD location (HR=2.36; 95% CI=1.02-5.47) were predictive factors for relapse while inflammatory CD phenotype was a protective factor (HR=0.32; 95% CI=0.11-0.90). Reintroduction of anti-TNF upon relapse was effective and safe. CONCLUSION: Anti-TNF discontinuation led to significantly higher relapse rates compared to IMM discontinuation in UC and CD patients on combination therapy. Anti-TNF discontinuation and ileal CD location were identified as predictive factors for relapse while inflammatory CD phenotype was a protective factor. Retreatment after anti-TNF discontinuation was effective and safe.

High incidence of surgery and initiation of medical therapies after colectomy for ulcerative colitis or inflammatory bowel disease unclassified / Necesidad de reintervención o tratamiento inmunosupresor o biológico tras colectomía en pacientes con colitis ulcerosa y enfermedad inflamatoria intestinal no clasificada

Background and aims: Despite novel medical therapies, colectomy has a role in the management of patients with ulcerative colitis (UC) and inflammatory bowel disease unclassified (IBDU). This study aimed to determine the incidence of unplanned surgery and initiation of immunomodulatory or biologic therapy (IMBT) after colectomy in patients with UC or IBDU, and identify associated factors. Methods: Data of patients with preoperative diagnosis of UC or IBDU who underwent colectomy and were followed up at a single tertiary centre was retrospectively collected. The primary outcome was the risk of unplanned surgery and initiation of IMBT during follow-up after colectomy. Secondary outcomes were development of Crohn's disease-like (CDL) complications and failure of reconstructive techniques. Results: 68 patients were included. After a median follow-up of 9.9 years, 32.4% of patients underwent unplanned surgery and IMBT was started in 38.2%. Unplanned surgery-free survival was 85% (95% confidence interval [CI] 73.8–91.6%) at 1 year, 76% (95% CI 63.2–84.9%) at 5 years and 69.1% (95% CI 55–79.6%) at 10 years. IMBT-free survival was 96.9% (95% CI 88.2–99.2%) at 1 year, 77.6% (95% CI 64.5–86.3%) at 5 years and 63.3% (95% CI 48.8–74.7%) at 10 years. 29.4% of patients met criteria for CDL complications. CDL complications were significantly associated to IMBT (hazard ratio 4.5, 95% CI 2–10.1). Conclusion: In a retrospective study, we found a high incidence of unplanned surgery and IMBT therapy initiation after colectomy among patients with UC or IBDU. These results further question the historical concept of surgery as a “definitive” treatment.(AU)

Objetivo: La colectomía continúa teniendo un rol terapéutico en pacientes con colitis ulcerosa (CU) y enfermedad inflamatoria intestinal no clasificada (EII-noC). El objetivo de este estudio fue determinar la incidencia de cirugía no planificada e inicio de terapias inmunomoduladoras/biológicas (TIMB) tras colectomía en pacientes con CU o EII-noC, e identificar factores de riesgo. Métodos: Se analizaron retrospectivamente los datos de pacientes con CU o EII-noC y colectomía seguidos en un centro terciario. El objetivo primario fue evaluar el riesgo de reintervención e inicio de TIMB. Los objetivos secundarios fueron analizar la incidencia de Crohn “de novo” y el fracaso de las técnicas reconstructivas. Resultados: 68 pacientes fueron incluidos. Tras una mediana de seguimiento de 9.9 años, el 32.4% de los pacientes fueron reintervenidos y el 38.2% inició TIMB. La supervivencia libre de reintervención fue 85% (intervalo confianza 95% [IC] 73.8-91.6%) al año, 76% (IC 95% 63.2-84.9%) a los 5 años y 69.1% (IC 95% 55-79.6%) a los 10 años. La supervivencia libre de TIMB fue 96.9% (IC 95% 88.2-99.2%) al año, 77.6% (IC 95% 64.5-86.3%) a los 5 años y 63.3% (IC 95% 48.8-74.7%) a los 10 años. 29.4% de los pacientes cumplieron criterios de Crohn “de novo”. Crohn “de novo” fue factor de riesgo para inicio de TIMB (Hazard ratio 4.5%, IC 95% 2-10.1). Conclusión: En una cohorte retrospectiva, encontramos una alta incidencia de cirugía e inicio de TIMB tras colectomía en CU o EII-noC. Estos resultados cuestionan el concepto clásico de colectomía como tratamiento definitivo.(AU)

High incidence of surgery and initiation of medical therapies after colectomy for ulcerative colitis or inflammatory bowel disease unclassified.

BACKGROUND AND AIMS: Despite novel medical therapies, colectomy has a role in the management of patients with ulcerative colitis (UC) and inflammatory bowel disease unclassified (IBDU). This study aimed to determine the incidence of unplanned surgery and initiation of immunomodulatory or biologic therapy (IMBT) after colectomy in patients with UC or IBDU, and identify associated factors. METHODS: Data of patients with preoperative diagnosis of UC or IBDU who underwent colectomy and were followed up at a single tertiary centre was retrospectively collected. The primary outcome was the risk of unplanned surgery and initiation of IMBT during follow-up after colectomy. Secondary outcomes were development of Crohn's disease-like (CDL) complications and failure of reconstructive techniques. RESULTS: 68 patients were included. After a median follow-up of 9.9 years, 32.4% of patients underwent unplanned surgery and IMBT was started in 38.2%. Unplanned surgery-free survival was 85% (95% confidence interval [CI] 73.8-91.6%) at 1 year, 76% (95% CI 63.2-84.9%) at 5 years and 69.1% (95% CI 55-79.6%) at 10 years. IMBT-free survival was 96.9% (95% CI 88.2-99.2%) at 1 year, 77.6% (95% CI 64.5-86.3%) at 5 years and 63.3% (95% CI 48.8-74.7%) at 10 years. 29.4% of patients met criteria for CDL complications. CDL complications were significantly associated to IMBT (hazard ratio 4.5, 95% CI 2-10.1). CONCLUSION: In a retrospective study, we found a high incidence of unplanned surgery and IMBT therapy initiation after colectomy among patients with UC or IBDU. These results further question the historical concept of surgery as a "definitive" treatment.

Anticuerpos inmunomoduladores en el tratamiento del cáncer / Immunomodulatory antibodies for cancer treatment

Los anticuerpos inmunomoduladores (Aim) tienen la capacidad de modificar el funcionamiento del sistema inmune. Sus efectos sobre los receptores CTLA-4 y PD-1 producen disminución de la activación celular, afectando las acciones de los linfocitos T. La función de ambos receptores es cesar las funciones de las células inmunes autorreactivas que no son destruidas en las estructuras inmunes correspondientes y proteger los tejidos inflamados. Los tumores que expresan estos receptores evitan el reconocimiento por parte de las células inmunes. Los Aim bloquean los receptores y permiten a los linfocitos reconocer y responder ante antígenos neoplásicos. Las investigaciones sobre los fármacos con Aim muestran eficacia moderada en el tratamiento de algunos casos de cáncer en estadios avanzados. El uso combinado de fármacos tiene potenciales efectos sinérgicos con resultados positivos. Aún deben establecerse los posibles indicadores de éxito terapéutico y la posibilidad de reducir los efectos adversos en el uso clínico. El objetivo de esta revisión fue analizar las funciones y utilidad terapéutica de los anticuerpos inmunomoduladores en el tratamiento del cáncer.

Introduction: immunomodulatory antibodies (MAbs) acquire the ability to alter the function of the immune system. Their effects on CTLA-4 and PD-1 receptors limit cellular activation, affecting T lymphocytes activity. The role of both receptors is to inhibit autoreactive immune cells not destroyed in the corresponding immune structures and to protect inflamed tissues. Discussion: tumors expressing these receptors evade immune cells recognition. MAbs block the receptors and enable lymphocytes to recognize and respond to neoplastic antigens. Research on MAbs drugs shows moderate efficacy in the treatment of some cases of advanced cancer. The combination of drugs has potentially synergistic mechanisms with positive results. Conclusions: possible indicators of therapeutic success and the likelihood of reducing the adverse effects in clinical use, have yet to be established. The aim of this review was to analyze the roles and usefulness of immunomodulatory antibodies for cancer therapy.

Una aproximación actualizada hacia el tratamiento de la Esclerosis Múltiple / AN UPDATED APPROACH TO THE TREATMENT OF MULTIPLE SCLEROSIS

La presente es una revisión bibliográfica actualizada sobre el manejo de la Esclerosis Múltiple (EM), enfermedad neurológica progresiva de tipo desmielinizante más frecuente a nivel mundial. En Chile, su presentación remitente-recurrente (RRMS) es patología GES, por lo que se vuelve relevante para el médico general y estudiantes del área de la salud reconocer e identificar las terapias disponibles para el control de esta patología. Si bien la EM no es un cuadro frecuente, su sintomatología es alarmante e incapacitante, por lo que, con frecuencia, el primer acercamiento del paciente es a los servicios de urgencia, tornándose necesario contar con nociones básicas sobre el tratamiento y manejo. La presente revisión recopiló artículos publicados entre 2019 y 2023 de distintos motores de búsqueda con énfasis en el tratamiento farmacológico y no farmacológico de esta enfermedad. Además de describir el tratamiento convencional como la inmunomodulación, las terapias biológicas, el soporte con glucocorticoides y los fármacos remielinizantes, se abordan nuevas líneas de investigación prometedoras, como el rol inmunogénico de la microbiota intestinal, la capacidad epigenética de la dieta, estrategias de rehabilitación cognitiva y el potencial uso de cannabinoides para el manejo paliativo del dolor. Se concluye que un tratamiento oportuno con fármacos modificadores de la enfermedad, tanto de primera línea como de segunda, son imprescindibles para el manejo de la EM, sin embargo, la calidad de vida puede verse significativamente acrecentada por la incorporación de estrategias que se encuentran al alcance del médico general y que no requieren de derivación a nivel secundario.

This is an updated bibliographical review on the management of Multiple Sclerosis (MS), the most common progressive neurological disease of demyelinating disorders worldwide. In Chile, its relapsing-remitting presentation (RRMS) is a state-covered illness pathology, so it becomes relevant for the general practitioner and med students to recognize and identify therapies available for the control of this desease. Although MS is not a frequent condition, its symptoms are alarming and disabling, which is why, frequently, the first approach of the patient is to the emergency services, making it necessary to have basic knowledge about treatment and management. The present review compiled articles published between 2019 and 2023 from different search engines with an emphasis on the pharmacological and non-pharmacological treatment of the MS. In addition to describing conventional treatment such as immunomodulation, biological therapies, glucocorticoid support and remyelinating drugs, new promising lines of research are addressed, such as the immunogenic role of the intestinal microbiota, the epigenetic capacity of the diet, strategies on cognition rehabilitation and the potential use of cannabinoids for the palliative management of pain. It is concluded that the classic treatment with disease-modifying drugs, both first-line and second-line, are essential for the management of MS; however, quality of life can be significantly increased by incorporating strategies found at the reach of the general practitioner and do not require referral at a greater complexity center.

Comparación entre inmunomoduladores y crioterapia para el tratamiento de lesiones genitales en mujeres con VPH / Comparison between immunomodulators and cryotherapy for the treatment of genital lesions in women with HPV / Comparação entre imunomoduladores e crioterapia para o tratamento de lesões genitais em mulheres com HPV

El virus del papiloma humano es una infección prevalente, que puede infectar cualquier mucosa del cuerpo y causar verrugas genitales externas o condilomas genitales y cáncer de cuello uterino. El tratamiento es difícil con una alta recurrencia y persistencia de las mismas, lo que afecta mayormente a mujeres jóvenes. El objetivo del presente estudio fue realizar una comparación entre inmunomoduladores y crioterapia para el tratamiento de lesiones genitales en mujeres con VPH. Se realizó una revisión bibliográfica de la literatura científica, entre inmunomoduladores y crioterapia para el tratamiento de lesiones genitales en mujeres con VPH de los últimos 20 años, donde se identificaron publicaciones de revisiones sistemáticas y metaanálisis. Se concluyó que la elección de los inmunomoduladores al igual que la crioterapia es mejor utilizarlos cuando existe lesiones clínicas inducidas por el VPH en la región genital y perianal en mujeres, dependiendo de la cantidad, el tamaño, la gravedad, la ubicación de las verrugas y las preferencias del paciente.

Human papillomavirus is a prevalent infection, which can infect any mucosa of the body and cause external genital warts or genital warts and cervical cancer. Treatment is difficult with a high recurrence and persistence of the same, which mainly affects young women. The objective of the present study was to compare immunomodulators and cryotherapy for the treatment of genital lesions in women with HPV. A narrative bibliographic review of the scientific literature was carried out, between immunomodulators and cryotherapy for the treatment of genital lesions in women with HPV of the last 20 years, where publications of systematic reviews and meta-analyses were identified. It was concluded that the choice of immunomodulators, like cryotherapy, is better used when there are clinical lesions induced by HPV in the genital and perianal region in women, depending on the number, size, severity, location of the warts and patient preferences.

O papilomavírus humano é uma infecção prevalente, que pode infectar qualquer mucosa do corpo e causar verrugas genitais externas ou verrugas genitais e câncer cervical. O tratamento é difícil com alta recorrência e persistência da mesma, que acomete principalmente mulheres jovens. O objetivo do presente estudo foi comparar imunomoduladores e crioterapia para o tratamento de lesões genitais em mulheres com HPV. Foi realizada uma revisão bibliográfica narrativa da literatura científica, entre imunomoduladores e crioterapia para tratamento de lesões genitais em mulheres com HPV dos últimos 20 anos, onde foram identificadas publicações de revisões sistemáticas e metanálises. Concluiu-se que a escolha de imunomoduladores, como a crioterapia, é melhor utilizada quando há lesões clínicas induzidas pelo HPV na região genital e perianal em mulheres, dependendo do número, tamanho, gravidade, localização das verrugas e preferências da paciente.

Diagnóstico de la infección tuberculosa en pacientes inmunodeprimidos y/o candidatos a terapias biológicas mediante el uso combinado de dos pruebas IGRA: T-SPOT.TB/QuantiFERON TB Gold In-Tube vs. T-SPOT.TB/QuantiFERON TB Gold Plus / Diagnosis of Tuberculous Infection in Immunosuppressed Patients and/or Candidates for Biologics Using a Combination of 2 IGRA Tests: T-SPOT.TB/QuantiFERON TB Gold In-Tube vs. T-SPOT.TB/QuantiFERON TB Gold Plus

Introducción: El diagnóstico de la infección tuberculosa latente (ITL) mediante IGRA sigue generando debate. La experiencia empleando dos pruebas IGRA de manera simultánea es escasa. El objetivo de este estudio es comparar los resultados de dos versiones de QuantiFERON-TB Gold (In-Tube/Plus) con los de T-SPOT.TB y analizar la eficacia de esta estrategia dual (T-SPOT.TB + QTF) para el diagnóstico de la ITL en población con alguna condición inmunosupresora.Métodos: Estudio prospectivo (mayo 2015-junio 2017) que incluye 2.999 pacientes inmunodeprimidos y/o candidatos a terapias biológicas, a los que se les realizó de manera simultánea dos IGRA: grupo-1 (1.535 pacientes): T-SPOT.TB + QuantiFERON-TB Gold-In-Tube (QTF-GIT); grupo-2 (1.464 pacientes): T-SPOT.TB + QuantiFERON-TB Gold Plus (QTF-Plus).Resultados: La concordancia entre QTF-GIT y T-SPOT.TB fue del 83,19% (κ = 0,532). Las proporciones de resultados positivos, negativos e indeterminados fueron, respectivamente: 14,33 vs. 17,06%; 82,41 vs. 74,46%; y 3,25 vs. 8,46%. La concordancia entre QTF-Plus y T-SPOT.TB fue del 87,56% (κ=0,609). Las proporciones de resultados positivos, negativos e indeterminados fueron, respectivamente: 15,02 vs. 15,36%; 82,92 vs. 79,37%; y 2,04 vs. 5,25%. Las discordancias entre T-SPOT.TB y QTF-Plus fueron del 12,43%, que implicaban que había 103 pacientes positivos y otros 79 pacientes negativos a expensas exclusivamente de uno de los dos IGRA.Conclusiones: Se evidenció una mayor concordancia entre QTF-Plus y T-SPOT.TB que entre QTF-GIT y T-SPOT.TB. Sin embargo, creemos que la proporción de resultados discordantes entre T-SPOT.TB y QTF-Plus es lo suficientemente relevante clínicamente como para justificar el empleo simultáneo de dos IGRA en este grupo específico de pacientes. (AU)

Introduction: The diagnosis of latent tuberculous infection (LTI) by IGRA continues to generate debate. Experience in the simultaneous use of 2 IGRA tests is scant. The aim of this study was to compare the results of 2 versions of QuantiFERON-TB Gold (In-Tube/Plus) with those of T-SPOT.TB, and to analyse the effectiveness of a dual strategy (T-SPOT.TB + QTF) for the diagnosis of LTI in an immunosuppressed population.Methods: We conducted a prospective study (May 2015-June 2017) that included 2,999 immunosuppressed patients and/or candidates for biologics, in whom 2 simultaneous IGRA tests were performed: Group 1 (1535 patients): T-SPOT.TB + QuantiFERON-TB Gold-In-Tube (QTF-GIT); Group 2 (1464 patients): T-SPOT.TB + QuantiFERON-TB Gold Plus (QTF-Plus).Results: The concordance between QTF-GIT and T-SPOT.TB was 83.19% (κ=0.532). The percentage of positive, negative, and indeterminate results were, respectively: 14.33% vs. 17.06%; 82.41% vs. 74.46%; and 3.25% vs. 8.46%. The concordance between QTF-Plus and T-SPOT.TB was 87.56% (κ=0.609). The percentage of positive, negative, and indeterminate results were, respectively: 15.02% vs. 15.36%; 82.92% vs. 79.37%; and 2.04% vs. 5.25%. Discrepancies between T-SPOT.TB and QTF-Plus were 12.43%, suggesting that 103 patients were positive and another 79 were negative due exclusively to 1 of the 2 IGRAs.Conclusions: Greater concordance was found between QTF-Plus and T-SPOT.TB than between QTF-GIT and T-SPOT.TB. However, we believe that the proportion of discrepancies between T-SPOT.TB and QTF-Plus is sufficiently important from a clinical point of view to justify the simultaneous use of 2 IGRA in this specific patient group. (AU)

[Translated article] Diagnosis of tuberculous infection in immunosuppressed patients and/or candidates for biologics using a combination of 2 IGRA tests: T-SPOT.TB/QuantiFERON TB Gold In-Tube vs. T-SPOT.TB/QuantiFERON TB Gold Plus / Diagnóstico de la infección tuberculosa en pacientes inmunodeprimidos y/o candidatos a terapias biológicas mediante el uso combinado de dos pruebas IGRA: T-SPOT.TB/QuantiFERON TB Gold In-Tube vs. T-SPOT.TB/QuantiFERON TB Gold Plus

Introduction: The diagnosis of latent tuberculous infection (LTI) by IGRA continues to generate debate. Experience in the simultaneous use of 2 IGRA tests is scant. The aim of this study was to compare the results of 2 versions of QuantiFERON-TB Gold (In-Tube/Plus) with those of T-SPOT.TB, and to analyse the effectiveness of a dual strategy (T-SPOT.TB + QTF) for the diagnosis of LTI in an immunosuppressed population.Methods: We conducted a prospective study (May 2015-June 2017) that included 2,999 immunosuppressed patients and/or candidates for biologics, in whom 2 simultaneous IGRA tests were performed: Group 1 (1535 patients): T-SPOT.TB + QuantiFERON-TB Gold-In-Tube (QTF-GIT); Group 2 (1464 patients): T-SPOT.TB + QuantiFERON-TB Gold Plus (QTF-Plus).Results: The concordance between QTF-GIT and T-SPOT.TB was 83.19% (κ=0.532). The percentage of positive, negative, and indeterminate results were, respectively: 14.33% vs. 17.06%; 82.41% vs. 74.46%; and 3.25% vs. 8.46%. The concordance between QTF-Plus and T-SPOT.TB was 87.56% (κ=0.609). The percentage of positive, negative, and indeterminate results were, respectively: 15.02% vs. 15.36%; 82.92% vs. 79.37%; and 2.04% vs. 5.25%. Discrepancies between T-SPOT.TB and QTF-Plus were 12.43%, suggesting that 103 patients were positive and another 79 were negative due exclusively to 1 of the 2 IGRAs.Conclusions: Greater concordance was found between QTF-Plus and T-SPOT.TB than between QTF-GIT and T-SPOT.TB. However, we believe that the proportion of discrepancies between T-SPOT.TB and QTF-Plus is sufficiently important from a clinical point of view to justify the simultaneous use of 2 IGRA in this specific patient group. (AU)

Introducción: El diagnóstico de la infección tuberculosa latente (ITL) mediante IGRA sigue generando debate. La experiencia empleando dos pruebas IGRA de manera simultánea es escasa. El objetivo de este estudio es comparar los resultados de dos versiones de QuantiFERON-TB Gold (In-Tube/Plus) con los de T-SPOT.TB y analizar la eficacia de esta estrategia dual (T-SPOT.TB + QTF) para el diagnóstico de la ITL en población con alguna condición inmunosupresora.Métodos: Estudio prospectivo (mayo 2015-junio 2017) que incluye 2.999 pacientes inmunodeprimidos y/o candidatos a terapias biológicas, a los que se les realizó de manera simultánea dos IGRA: grupo-1 (1.535 pacientes): T-SPOT.TB + QuantiFERON-TB Gold-In-Tube (QTF-GIT); grupo-2 (1.464 pacientes): T-SPOT.TB + QuantiFERON-TB Gold Plus (QTF-Plus).Resultados: La concordancia entre QTF-GIT y T-SPOT.TB fue del 83,19% (κ = 0,532). Las proporciones de resultados positivos, negativos e indeterminados fueron, respectivamente: 14,33 vs. 17,06%; 82,41 vs. 74,46%; y 3,25 vs. 8,46%. La concordancia entre QTF-Plus y T-SPOT.TB fue del 87,56% (κ=0,609). Las proporciones de resultados positivos, negativos e indeterminados fueron, respectivamente: 15,02 vs. 15,36%; 82,92 vs. 79,37%; y 2,04 vs. 5,25%. Las discordancias entre T-SPOT.TB y QTF-Plus fueron del 12,43%, que implicaban que había 103 pacientes positivos y otros 79 pacientes negativos a expensas exclusivamente de uno de los dos IGRA.Conclusiones: Se evidenció una mayor concordancia entre QTF-Plus y T-SPOT.TB que entre QTF-GIT y T-SPOT.TB. Sin embargo, creemos que la proporción de resultados discordantes entre T-SPOT.TB y QTF-Plus es lo suficientemente relevante clínicamente como para justificar el empleo simultáneo de dos IGRA en este grupo específico de pacientes. (AU)

Diagnosis of Tuberculous Infection in Immunosuppressed Patients and/or Candidates for Biologics Using a Combination of 2 IGRA Tests: T-SPOT.TB/QuantiFERON TB Gold In-Tube vs. T-SPOT.TB/QuantiFERON TB Gold Plus. / Diagnóstico de la infección tuberculosa en pacientes inmunodeprimidos y/o candidatos a terapias biológicas mediante el uso combinado de dos pruebas IGRA: T-SPOT.TB/QuantiFERON TB Gold In-Tube vs. T-SPOT.TB/QuantiFERON TB Gold Plus.

INTRODUCTION: The diagnosis of latent tuberculous infection (LTI) by IGRA continues to generate debate. Experience in the simultaneous use of 2 IGRA tests is scant. The aim of this study was to compare the results of 2 versions of QuantiFERON-TB Gold (In-Tube/Plus) with those of T-SPOT.TB, and to analyse the effectiveness of a dual strategy (T-SPOT.TB + QTF) for the diagnosis of LTI in an immunosuppressed population. METHODS: We conducted a prospective study (May 2015-June 2017) that included 2,999 immunosuppressed patients and/or candidates for biologics, in whom 2 simultaneous IGRA tests were performed: Group 1 (1535 patients): T-SPOT.TB + QuantiFERON-TB Gold-In-Tube (QTF-GIT); Group 2 (1464 patients): T-SPOT.TB + QuantiFERON-TB Gold Plus (QTF-Plus). RESULTS: The concordance between QTF-GIT and T-SPOT.TB was 83.19% (κ=0.532). The percentage of positive, negative, and indeterminate results were, respectively: 14.33% vs. 17.06%; 82.41% vs. 74.46%; and 3.25% vs. 8.46%. The concordance between QTF-Plus and T-SPOT.TB was 87.56% (κ=0.609). The percentage of positive, negative, and indeterminate results were, respectively: 15.02% vs. 15.36%; 82.92% vs. 79.37%; and 2.04% vs. 5.25%. Discrepancies between T-SPOT.TB and QTF-Plus were 12.43%, suggesting that 103 patients were positive and another 79 were negative due exclusively to 1 of the 2 IGRAs. CONCLUSIONS: Greater concordance was found between QTF-Plus and T-SPOT.TB than between QTF-GIT and T-SPOT.TB. However, we believe that the proportion of discrepancies between T-SPOT.TB and QTF-Plus is sufficiently important from a clinical point of view to justify the simultaneous use of 2 IGRA in this specific patient group.

Estudio comparativo de melatonina contra los tratamientos inmunomoduladores (interferón beta y acetato de glatirámero) en un modelo murino de esclerosis múltiple / A comparative study of melatonin and immunomodulatory therapy with interferon beta and glatiramer acetate in a mouse model of multiple sclerosis

Introducción: La esclerosis múltiple (EM) es una enfermedad crónica desmielinizante autoinmune del sistema nervioso central (SNC) que produce neuroinflamación; un modelo es la encefalitis autoinmune experimental (EAE). La EM ha sido tratada con interferón beta (IFN-β) y acetato de glatirámero (AG). Se ha descrito que la melatonina (MLT) modula la respuesta del sistema inmune. El objetivo de este estudio fue observar el efecto de la administración de MLT contra los tratamientos de primera línea utilizados en la EM (IFN-β y AG).MétodosSe indujo EAE a ratas macho Sprague Dawley y se les administró IFN-β, AG o MLT. Se colectó líquido cefalorraquídeo (LCR) y se midieron citocinas proinflamatorias por multiplex, además del registro de la evaluación neurológica de la EAE.ResultadosTodos los animales inmunizados establecieron la EAE. Se evaluó el primer ciclo de recaída-remisión, observando que IFN-β y AG tienen mejores resultados que MLT en la evaluación clínica. La concentración en el LCR tanto de IL-1β como de IL-12p70 no se vio modificada por el modelo o por los tratamientos administrados. EL TNF-α se vio disminuido en el LCR por el IFN-β y la MLT bajo el modelo de EM.ConclusionesEs necesario realizar estudios posteriores para evaluar los mecanismos moleculares involucrados en el comportamiento de la MLT en la EAE, así como la cuantificación de otras citocinas en diferentes matrices biológicas para poder considerar la MLT como un agente antiinflamatorio regulador de la EM. (AU)

Introduction: Multiple sclerosis (MS) is a chronic, demyelinating, autoimmune disease of the central nervous system causing neuroinflammation. Experimental autoimmune encephalitis (EAE) is a model of the disease. MS is classically treated with interferon beta (IFN-β) and glatiramer acetate (GA). Melatonin (MLT) has been reported to modulate immune system responses. The aim of the present study is to analyse the effects of MLT administration in comparison with the first-line treatments for MS (IFN-β and GA).MethodsEAE was induced in male Sprague-Dawley rats; the animals subsequently received either IFN-β, GA, or MLT. Cerebrospinal fluid (CSF) samples were analysed by multiplex assay to determine the levels of proinflammatory cytokines. The neurological evaluation of EAE was also recorded.ResultsAll immunised animals developed EAE. We evaluated the first relapse-remission cycle, observing that IFN-β and GA had better results than MLT in the clinical evaluation. Neither EAE nor any of the treatments administered modified CSF IL-1β and IL-12p70 concentrations. However, IFN-β and MLT did decrease CSF TNF-α concentrations.ConclusionsFurther studies are needed to evaluate the molecular mechanisms involved in the behaviour of MLT in EAE, and to quantify other cytokines in different biological media in order for MLT to be considered an anti-inflammatory agent capable of regulating MS. (AU)

A comparative study of melatonin and immunomodulatory therapy with interferon beta and glatiramer acetate in a mouse model of multiple sclerosis. / Estudio comparativo de melatonina contra los tratamientos inmunomoduladores (interferón beta y acetato de glatirámero) en un modelo murino de esclerosis múltiple.

INTRODUCTION: Multiple sclerosis (MS) is a chronic, demyelinating, autoimmune disease of the central nervous system causing neuroinflammation. Experimental autoimmune encephalitis (EAE) is a model of the disease. MS is classically treated with interferon beta (IFN-ß) and glatiramer acetate (GA). Melatonin (MLT) has been reported to modulate immune system responses. The aim of the present study is to analyse the effects of MLT administration in comparison with the first-line treatments for MS (IFN-ß and GA). METHODS: EAE was induced in male Sprague-Dawley rats; the animals subsequently received either IFN-ß, GA, or MLT. Cerebrospinal fluid (CSF) samples were analysed by multiplex assay to determine the levels of proinflammatory cytokines. The neurological evaluation of EAE was also recorded. RESULTS: All immunised animals developed EAE. We evaluated the first relapse-remission cycle, observing that IFN-ß and GA had better results than MLT in the clinical evaluation. Neither EAE nor any of the treatments administered modified CSF IL-1ß and IL-12p70 concentrations. However, IFN-ß and MLT did decrease CSF TNF-α concentrations. CONCLUSIONS: Further studies are needed to evaluate the molecular mechanisms involved in the behaviour of MLT in EAE, and to quantify other cytokines in different biological media in order for MLT to be considered an anti-inflammatory agent capable of regulating MS.

Análisis del cumplimiento del plan de consumo de los medicamentos de alto costo. Matanzas. 2012-2017 / Analysis of the fulfillment of the consumption plan of high cost medications. Matanzas. 2012 - 2017

RESUMEN Introducción: los medicamentos de alto costo son medicamentos nuevos, altamente específicos y utilizados en condiciones clínicas complejas, como el tratamiento de algunos tipos de cáncer; enfermedades que comprometen el sistema inmunológico, enfermedades inflamatorias o infecciosas. Objetivo: determinar cumplimiento del plan de consumo de los medicamentos de alto costo en la provincia de Matanzas, en el quinquenio 2012-2017. Materiales y métodos: estudio descriptivo, observacional de seguimiento sobre el cumplimiento del plan de consumo de los medicamentos de alto costo, en la población matancera del año 2012 al 2017. Se analizó el universo de medicamentos incluidos en esta categoría, a partir de la base de datos de suministro de medicamentos que emplea la Empresa Comercializadora de Medicamentos. Se identificaron las variables estudiadas. Resultados: en todo el período de estudio se observó un incremento creciente de los medicamentos de alto costo, en el 88,9 % de ellos el consumo ha estado por encima de la planificación realizada por la provincia. Los costos se incrementaron en un 233 % y además en las prescripciones realizadas de estos productos, se encontraron problemas como escaques vacíos, antibióticos sin impresión diagnóstica y omisión de la forma de presentación del medicamento y/o dosis indicada. Conclusiones: el consumo de muchos medicamentos de alto costo fue mayor que la planificación realizada en la provincia de Matanzas, durante el período analizado. Implicó un incremento significativo del presupuesto destinado a estos fines y se detectaron dificultades en el cumplimiento de lo establecido en las prescripciones de dichos medicamentos (AU).

ABSTRACT Introduction: high cost medications (HCM) are new highly specific medications and used in complex clinical conditions as in treatment of some types of cancer, diseases that compromise the immunological system, inflammatory or infections disorders. Objective: to determine the fulfillment of the consumption plan of high-cost medications in the province of Matanzas in the period 2012-2017. Materials and methods: a descriptive, observational, follow up study on the fulfillment of the consumption plan of high-cost medication by the population of Matanzas2012 year to 2017. The universe of drugs included in this category was analyzed on the bases of the drug-supplying database used by the Drug Commercializing Enterprise (ENCOMED in Spanish). The studied variables were identified. Results: it was observed a growing increase of high-cost drugs use during all the period; in 88.9 % of them the consumption has been above the planning made in the province. The costs increased in 233 %, and besides that in the prescriptions made of these drugs there were found problems like empty boxes, antibiotics without diagnostic impression and omissions of the drug presentation forms and/or the prescribed doses. Conclusions: the consumption of many high-cost drugs was higher than the planning made in the province of Matanzas for the analyzed period. It implied a significant increase of the budget destined for these aims and difficulties were found in the fulfillment of the terms for prescribing these drugs (AU).

Liver transplant immunosuppression during the covid-19 pandemic. / Inmunosupresión en el trasplante hepático en la era covid-19.

SARS-CoV-2 infection has produced a pandemic with serious consequences for our health care system. Although liver transplant patients represent only a minority of the population, the hepatologists who follow these patients have tried to coordinate efforts to produce a protocol the management of immunosuppression during SARS-CoV-2 infection. Although there are no solid studies to support general recommendations, experiences with other viral infections (hepatitis C, cytomegalovirus) suggest that management of immunosuppression without mycophenolate mofetil or m-Tor inhibitors (drugs that are also associated with leukopenia and lymphopenia) may be beneficial. It is also important to pay attention to possible drug interactions, especially in the case of tacrolimus, with some of the treatments with antiviral effect given in the context of COVID 19 (lopinavir/ritonavir, azithromycin). Finally, the immunosuppressive effect of immunomodulating drugs (tocilizumab and similar) administered to patients with severe lung disease should be taken into account. The mechanisms of action of the different immunosuppressive drugs are reviewed in this article, as well as their potential effect on SARS-CoV-2 infection, and suggests guidelines for the management of immunosuppression.

Evaluación de formulaciones inmunoterapéuticas experimentales en el modelo hibrido murino de Reaccion del Injerto contra el Hospedador / Evaluation of experimental immunotherapeutic formulations in the hybrid murine model of Graft-versus-Host Reaction

Introducción: La Enfermedad del Injerto Contra el Hospedador es la complicación más frecuente de los Trasplantes de Células Madre Hematopoyéticas y de todos los trasplantes que contengan células inmunocompetentes alogénicas, el 100 por ciento la padecen y cerca del 30 por ciento mueren por su causa; una proporción alta de casos son esteroide-refractarios, asimismo otras medidas inmunosupresoras modernas fracasan. En los campos de la Inmunoterapia y la Vaccinología también existe una escasez preocupante de inmunomoduladores de origen biológico potentes, efectivos, seguros y de amplio espectro. Existe un modelo híbrido murino de gran utilidad metodológica para estudios experimentales. Objetivo: Evaluar dos formulaciones novedosas de origen biotecnológico, una de ellas inmunopotenciadora y otra inmunosupresora, desarrolladas como cocleatos. Material y Métodos: Mediante Microscopia Electrónica y RT-PCR se caracterizaron las formulaciones como nanopartículas y su capacidad de regular la expresión del ARNm de linfoquinas definitorias de sus perfiles, respectivamente. Empleando el modelo de Enfermedad del Injerto Contra el Hospedador en ratón híbrido F1 (CBAxC57BL), se evaluó su carácter inmunomodulador in vivo . Resultados: Partiendo de los proteoliposomas de Neisseria meningitidis, se obtuvieron dos formulaciones en forma de cocleatos, ambas con diámetros de partícula inferior a 100nm. La Formulación 1mostró un perfil proinflamatorio con potente capacidad de aumentar el IFNγ y el TNFα y potenció el Índice de Bazo hasta 2,05 en el modelo EICH con p=0,0002. La Formulación 2 mostró un perfil supresor-regulatorio con potente capacidad de aumentar la IL-10 y el TGFβ y además de suprimir la producción de TNFα. En el modelo usado, esta formulación, suprimió el Índice de Bazo de manera dosis dependiente y con alta significación estadística. Se corroboró el conocido perfil de seguridad y ausencia de reactogenicidad de ambas formulaciones. Conclusiones: Ambas formulaciones tienen potencial aplicación en los campos de la terapia de Enfermedad del Injerto Contra el Hospedador en otras patologías y en Vaccinología. Los resultados obtenidos en el presente trabajo fundamentan la conveniencia de continuar el desarrollo farmacéutico y completar la preclínica de ambas formulaciones(AU)

Introduction: Graft-versus-host disease is the most frequent complication of Hematopoietic Stem Cell Transplants and all transplants containing allogeneic immunocompetent cells; 100 percent of patients suffer from this complication and about 30 percent die for this particular cause. A high proportion of cases are steroid-refractory; likewise, other modern immunosuppressive measures fail. In the fields of Immunotherapy and Vaccinology, there is also a worrying shortage of powerful, effective, safe and broad spectrum immunomodulators of biological origin. There is a hybrid murine model of great methodological utility for experimental studies. Objective: To evaluate two novel formulations of biotechnological origin: an immunopotentiator formulation and an immunosuppressive one, which were developed as cochleates. Material and Methods: The formulations assayed by Electron Microscopy and RT-PCR were characterized as nanoparticles and for their capacity to regulate lymphokine mRNA expression profile, respectively. The immunomodulatory character was evaluated in vivo using Graft-versus-host disease in (CBAxC57BL) F1 hybrid mice. Results: Starting from the proteoliposomes derived from Neisseria meningitides, two cochleate formulations were obtained, both with particle diameters below 100 nm. Formulation 1 showed a proinflammatory profile with potent capacity to increase IFNγ and TNFα, and potentiated the Spleen Index up to 2.05 in the GVDH model with p = 0.0002. Formulation 2 showed a suppressor/regulatory profile with potent capacity to increase IL-10 and TGFβ and suppress the production of TNFα. In the model used, this formulation suppressed the Spleen Index in a dose-dependent manner with high statistical significance. The known safety profile and absence of reactogenicity of both formulations was corroborated. Conclusions: Both formulations have potential application in the fields of GVHD therapy and other pathologies as well as in Vaccinology. The results obtained in the present work suggest the usefulness to continue with the pharmaceutical development and complete the preclinical studies of both formulations(AU)

Los reumatólogos en la pandemia COVID-19 / Rheumatologists in the COVID-19 pandemic

Desde fines del 2019 enfrentamos el brote de una nueva infección por coronavirus llamada COVID-19, que rápidamente se transformó en una pandemia y llegó a nuestro país a principios del 2020. Esto ha traído muchas preguntas y desafíos, específicamente en nuestros pacientes con enfermedades autoinmunes, que tienen tradicionalmente mayor riesgo de contraer infecciones y de complicarse por estas. Por otra parte, en el tratamiento actual del síndrome respiratorio agudo severo causado por el coronavirus SARS-CoV-2 se están usando e investigando varios medicamentos inmunosupresores e inmunomoduladores del arsenal reumatológico para controlar la respuesta inmune exagerada que se produce en el huésped en el COVID-19 grave. En esta revisión analizamos la literatura existente hasta el momento sobre pacientes reumatológicos y COVID-19, medicamentos reumatológicos en investigación y en uso para el manejo de la infección por SARS-CoV-2, y resumimos ciertas recomendaciones de manejo específicas para nuestros pacientes.

Since the end of 2019 we have been facing the outbreak of a new coronavirus infection called COVID-19, which quickly turned into a pandemic arriving in Chile in early 2020. This has brought with it many questions and challenges, specifically for our patients with autoimmune diseases, which have an increased risk of infections due to their disease and the use of immunosuppresant and corticosteroid drugs. On the other hand, in the current treatment of severe acute respiratory syndrome caused by the SARS-CoV-2 coronavirus, several immunosuppressive and immunomodulatory drugs in the rheumatologic arsenal are being used and investigated to control the exaggerated immune response that occurs in the host in serious COVID -19 cases. In this review we investigated the literature to date on rheumatology patients and COVID-19, rheumatology drugs under investigation and in use for the management of SARS-CoV-2 infection, and have summarized certain specific management recommendations for our patients

Encefalitis por anticuerpos contra el receptor de NMDA. Reporte de un caso y revisión de la literatura / Anti-NMDA receptor encephalitis. Case Report and Literature Review / Encefalite causada por anticorpos contra o receptor NMDA. Relatório de caso e revisão da literatura

Resumen: La encefalitis por anticuerpos contra el receptor de NMDA es un desorden grave, tratable y potencialmente reversible, caracterizado por la presencia de alteraciones en el comportamiento, convulsiones y trastornos del movimiento. La presencia de anticuerpos contra el receptor del glutamato (anti-NMDA) en plasma o líquido cefalorraquídeo es específico para el diagnóstico de la enferme -dad. El reconocimiento temprano de la enfermedad es vital para el pronóstico del paciente, dado que el manejo precoz facilita la recuperación y reducción de la morbimortalidad. El tratamiento consiste en la utilización de corticoides, inmunoglobulina intravenosa o plasmaféresis como primera línea de terapia; además de otros inmunomoduladores, como ciclofosfamida o rituximab, como segunda línea. La recuperación es lenta, pero presenta mejoría en la medida en que los títulos de anticuerpos disminuyen y llega a una recuperación completa hasta en 75 % de los pacientes.

Abstract: Anti-NMDA receptor encephalitis is a severe, treatable, and potentially reversible disorder characterized by the presence of behavioral disturbances, seizures, and movement disorders. The presence of antibodies against the glutamate receptor (anti-NMDA) in plasma or cerebrospinal fluid is specific to the diagnosis of the disease. Early recognition of the disease is vital for the patient's prognosis since early management facilitates recovery and reduction of morbidity and mortality. Treatment consists of corticosteroids, intravenous immunoglobulin, or plasmapheresis as the first line of therapy, in addition to other immunomodulators, such as cyclophosphamide or rituximab, as the second line. Recovery is slow but improves as antibody titers decrease. Complete recovery occurs in up to 75 % of patients.

Resumo: A encefalite causada por anticorpos contra o receptor NMDA é um distúrbio grave, tratável e potencialmente reversível, caracterizado pela presença de alterações comportamentais, convulsões e transtornos de movimento. A presença de anticorpos contra o receptor de glutamato (anti-NMDA) no plasma ou no líquido cefalorraquidiano é específica para o diagnóstico da doença. O reconhecimento precoce da doença é vital para o prognóstico do paciente, visto que o tratamento precoce facilita a recuperação e a redução da morbimortalidade. O tratamento consiste no uso de corticoides, imunoglobulina intravenosa ou plasmaférese como primeira linha de terapia. Além de outros imunomoduladores, como ciclofosfamida ou rituximabe, como segunda linha. A recuperação é lenta, mas apresenta melhora à medida que os títulos de anticorpos diminuem e a recuperação completa ocorre em até 75% dos pacientes.

Tratamiento de la miastenia gravis juvenil / Treatment of juvenile myasthenia gravis

La miastenia gravis juvenil es una enfermedad autoimmune poco frecuente, por lo que ha sido difícil recopilar datos de estudios controlados aleatorizados prospectivos para evaluar la eficacia y los resultados de distintos tratamientos. Si bien hay diferencias entre la miastenia gravis juvenil y la del adulto, se han utilizado los datos aportados por algunas investigaciones en adultos en el tratamiento de la miastenia gravis juvenil. Se evaluarán las distintas opciones terapéuticas, con las distintas evidencias que lo sostienen y se elaborará un algoritmo de tratamiento teniendo siempre presente que cada paciente nos ofrece distintos desafíos.

Juvenile myasthenia gravis is a rare autoimmune disease, which has made it difficult to collect data from prospective randomized controlled trials to evaluate the efficacy and results of different treatments. Although there are differences between the juvenile myasthenia gravis and that of the adult, the data provided by some researches in adults in the treatment of juvenile myasthenia gravis have been used. The different therapeutic options will be evaluated, with the different evidences that sustain it and a treatment algorithm will be elaborated keeping always in mind that each patient offers us different challenges.

Use of Immunomodulatory Drugs at a Uveitis Clinic. / Uso de fármacos inmunomoduladores en una consulta de uveítis.

OBJECTIVE: The treatment of noninfectious uveitis includes steroids and immunomodulatory drugs, the use of which has increased in the last few years, and the options have been enriched with the development of new treatments. However, clear therapeutic guidelines and protocols have not been developed. The purpose is to analyze the response to the drugs used and the characteristics of the patients treated at a multidisciplinary uveitis clinic. MATERIAL AND METHODS: Observational and retrospective study of the patients attended to from January 2012 to December 2015. Infectious, posttraumatic and postoperative uveitis, as well as masquerade syndrome, were excluded. RESULTS: Two hundred six patients were included. Overall, 58.80% had uveitis without association of systemic disease, mostly idiopathic uveitis, and 35.65% had uveitis with systemic involvement, mainly related to spondyloarthritis. Uveitis without systemic association and anterior uveitis achieved disease control with local treatment more frequently than others (p=.002 and p <.001, respectively). In all, 49.76% of the patients required systemic treatment. Among those treated with immunomodulators, 53.26% needed a second drug and 31.52% needed a third drug. Women required immunomodulators more often than men (P=.042). Methotrexate was the most widely used immunomodulator. Posterior uveitis responded less favorably to the second immunomodulator than anterior uveitis (p=.006). CONCLUSIONS: Almost half of the patients needed an immunomodulatory drug and some of them required successive drug changes. Intermediate uveitis was the most treatment-refractory uveitis.

Advances in the Immunobiological Therapies for Advanced Melanoma. / Nuevos avances de tratamiento inmunobiológico en el melanoma avanzado.

Metastatic or locally advanced unresectable melanoma carries a high morbidity and mortality. However, notable advances have been made in recent years in the systemic treatment of this disease, with the appearance of targeted therapy using tyrosine kinase inhibitors that block the mitogen activated protein kinase pathway, and of modern immunotherapy with immune-modulating monoclonal antibodies. In this paper, we provide an update of available data on new immune therapies and we review the clinical development that led to their approval for use in routine clinical practice.