Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 6 de 6
Filter
1.
Acta méd. peru ; 39(2): 151-165, abr.-jun. 2022. tab, graf
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1403002

ABSTRACT

RESUMEN El transductor de señal Janus-Kinasa y la vía de activación de la transcripción conocida como JAK/STAT es una ruta de señalización principal para la transducción de información en muchas citocinas inflamatorias implicadas durante la sepsis. Se ha demostrado que la vía JAK/STAT está fuertemente relacionada con el fallo multiorgánico, además que muchas citocinas pueden ejercer sus efectos biológicos a través de esta ruta. En los últimos años, se ha logrado un progreso significativo en la comprensión de las funciones de este complejo, sin embargo, su rol en la sepsis como objetivo terapéutico permanece en experimentación. En esta revisión se describen las funciones específicas de la vía JAK/STAT, su rol en la sepsis y presentamos un enfoque traslacional respecto a la perspectiva terapéutica para inhibir esta ruta de señalización durante la sepsis y su interacción con enfermedades inflamatorias como la COVID-19.


ABSTRACT The Janus-Kinase signal transducer and the transcription activation pathway known as JAK /STAT is a major signaling pathway for the transduction of information in many inflammatory cytokines involved during sepsis. The JAK /STAT pathway has been shown to be strongly related to multiorgan failure, and many cytokines can exert their biological effects through this pathway. In recent years, considerable progress has been made in understanding functions of this complex; however, its role in sepsis as a therapeutic target remains under experimentation. This review describes the specific functions of the JAK /STAT pathway, its role in sepsis, and presents a translational approach to the therapeutic perspective aiming to inhibit this signaling pathway during sepsis and its interaction with inflammatory diseases such as COVID-19.

2.
Rev. méd. Chile ; 146(6): 808-812, jun. 2018. tab, graf
Article in Spanish | LILACS | ID: biblio-961463

ABSTRACT

We report a 19 years old male presenting with knee pain, elevated liver enzymes and proteinuria. Further investigation found positive antinuclear and anti-smooth muscle antibodies and a liver biopsy revealed the presence of an autoimmune hepatitis. Treatment with corticosteroids and azathioprine was started, resulting in normalization of liver enzymes but proteinuria persisted and a kidney biopsy disclosed a focal segmental glomerulosclerosis. The use of lisinopril resulted in a significative reduction of proteinuria and, after 30 months of follow up, he continues with azathioprine, lisinopril and a low prednisone dose without evidence of liver or kidney disease activity.


Subject(s)
Humans , Male , Young Adult , Proteinuria/complications , Glomerulosclerosis, Focal Segmental/complications , Hepatitis, Autoimmune/complications , Proteinuria/diagnosis , Proteinuria/immunology , Proteinuria/drug therapy , Immunohistochemistry , Glomerulosclerosis, Focal Segmental/diagnosis , Glomerulosclerosis, Focal Segmental/immunology , Autoimmunity , Hepatitis, Autoimmune/diagnosis , Hepatitis, Autoimmune/immunology , Diagnosis, Differential , Kidney/pathology , Liver/pathology
3.
Rev. méd. hered ; 27(2): 100-105, abr.-jun. 2016. ilus, tab
Article in Spanish | LILACS, LIPECS | ID: biblio-982863

ABSTRACT

Síndrome hemofagocítico (SH) es un cuadro sistémico severo usualmente fatal, reportado como causa secundariaen adultos. Histoplasmosis ha sido descrita como una de las causas, siempre en pacientes con inmunosupresión. Sepresenta el caso de un paciente varón natural de Huánuco con historia de tos y expectoración de dos meses e infiltradopulmonar intersticial y parenquimal basal derecho con adenopatía mediastinal. Ingresó con fiebre, pancitopenia,alteración de pruebas hepáticas y pruebas de coagulación que cumplía criterios de SH. En el aspirado de médulaósea se observaron inclusiones intracitoplasmáticas en los macrófagos compatibles con Histoplasma capsulatum.La serología para HTLV-1 fue positiva por lo que se analiza el rol de este virus como agente inmunosupresor quecondiciona SH secundario a histoplasmosis diseminada.


The hemophagocytic syndrome (HS) is a severe systemic illness ultimately fatal associated with underlying conditions. Histoplasmosis has been associated with HS in immunosuppressed patients. We present the case of a male patient from Huanuco with a 2-month history of productive cough and presence of interstitial pulmonary infiltrates, and consolidation in the right lower lobe associated with mediastinal lymphadenopathies on the chest x-ray. The patient presented with fever, pancytopenia and abnormalities in the liver and coagulation tests fulfilling criteria for HS. A bone marrow aspiration showed intracytoplasmic structures within the macrophages compatible with Histoplasma capsulatum. Serology for HTLV-1 was positive. We analyzed the role of HTLV-1 inducing immunosuppression leading to the development of disseminated histoplasmosis and HS.


Subject(s)
Male , Humans , Middle Aged , Histoplasmosis , Human T-lymphotropic virus 1 , Lymphohistiocytosis, Hemophagocytic
4.
Rev. méd. hered ; 23(4): 223-228, oct.-dic. 2012. tab, graf
Article in Spanish | LILACS, LIPECS | ID: lil-665063

ABSTRACT

Objetivo: Describir la respuesta terapéutica con un anticuerpo monoclonal anti CD20 (Rituximab), en pacientes con Trombocitopenia Inmune (PTI). Material y métodos: Estudio retrospectivo, descriptivo y observacional tipo serie de casos. Se revisaron las historias clínicas de pacientes adultos con PTI que recibieron el anticuerpo monoclonal anti CD20 (Rituximab), desde diciembre 2005 hasta diciembre 2010. Se definió respuesta: conteo plaquetario >30 mil, por lo menos duplicar el conteo plaquetario inicial y no signos de sangrado, y respuesta completa: conteo plaquetario >100 mil y no signos de sangrado. Resultados: Se evaluaron 24 cursos de tratamiento. Hubo respuesta en 18 (75%), en una media de 11,9 semanas (rango 0,7 û 37,4), la duración media de respuesta fue 16 meses (rango 3,3 û 55,3). Se mantuvo la respuesta obtenida en 12 pacientes, seguimiento promedio de 22 meses (rango 4 - 62). Se logró respuesta completa en 13/23 (60%) casos, en una media de 17 semanas (rango 0,7 û 62,3), con una duración media de respuesta completa de 10,1 meses (rango 2,3 û 25,2), 5 casos mantuvieron respuesta completa con una media de seguimiento de 20 meses (rango 8 û 29). Conclusiones: Se obtuvo una alta tasa de respuesta al tratamiento con Rituximab (hasta 75%) en casos de PTI que fallaron al menos a una línea de tratamiento.


Objective: To describe the therapeutic response of an anti CD20 monoclonal antibody (Rituximab) in patients with immune thrombocytopenia (ITT). Methods: Retrospective, descriptive and observational case series. The clinical charts of ambulatory patients with ITT who received Rituximab from December 2005 to December 2010 were reviewed. Response was defined as platelet count > 30 thousand, at least duplicate the initial platelet count and no evidence of bleeding, and complete response was defined as platelet count > 100 thousand and no evidence of bleeding. Results: 24 courses of treatment were evaluated. Response was obtained in 18 patients (75%); mean time to response was 11.9 weeks (range: 0,7 to 37.4); mean duration of response was 16 months (range: 3.3 to 55.3); 12 patients remained with the achieved response during a mean follow up of 22 months (range: 2.3 to 25.2). Complete response was obtained in 13/23 cases (60%); mean time to response was 17 weeks (range: 0.7 to 62,3); mean duration of response was 10,1 months (range: 2.3 to 25.2); 5 patients remained with complete response after a follow up of 20 months (range: 8-29). Conclusions: A high response rate was achieved with Rituximab (75%) in patients with ITT who had failed at least to one treatment.


Subject(s)
Humans , Male , Female , Antibodies, Monoclonal , Purpura, Thrombocytopenic, Idiopathic , Epidemiology, Descriptive , Retrospective Studies , Case Reports , Observational Studies as Topic
5.
Rev. chil. urol ; 74(1): 30-34, 2009. tab, graf
Article in Spanish | LILACS | ID: lil-562706

ABSTRACT

Introducción: La invasión perineural en biopsia transrectal se ha relacionado con un cáncer prostático de mayor estadío patológico. Materiales y métodos: Para determinar si la invasión perineural es un factor de riesgo de enfermedad extraprostática analizamos las biopsias transrectales y de prostatectomías radicales durante 11 años. Se agruparon según grupos de riesgo y se estimó Likelihood ratio (LR) de la invasión perineural como predictor de etapa pT3. Resultados: De 269 pacientes, 5,97 por ciento (16) presentaba invasión perineural en la biopsia transrectal. De estos 87,5 por ciento presentaba un estadio pT3, comparado a 41 por ciento del total. La invasión perineural tiene un LR (+) de 10,05 para enfermedad extraprostática. Cuando está presente la probabilidad de enfermedad pT3 aumenta de 20,1 por ciento a 71,6 por ciento en el grupo de riesgo bajo, de 54 por ciento a 92,1 por ciento en el riesgo medio y de 59,7 por ciento a 93,1 por ciento en el riesgo alto. Conclusiones: La invasión perineural en la biopsia prostática transrectal es un factor de riesgo de cáncer extraprostático.


Introduction: Perineural invasion in transrectal biopsy specimens correlates with higher pathological stages in prostate cancer. Material and methods: To determinate if perineural invasion is a risk factor for non organo-confined disease we analyzed 269 consecutive transrectal biopsy and radical prostatectomy specimens over the period of eleven years. They were categorized in risk groups and the Likelihood ratio (LR) of the perineural invasion as a predictor of phase pT3 was calculated. Results: Of 269 patients, 5.97 percent (16) had a perineural invasion in a transrectal biopsy. Of those patients, 87.5 percent had phase pT3, compared to 41 percent of the total. The perineural invasion has an LR (+) 10,05 for non organo-confined disease, when it’s present the LR of pT3 disease increases from 20.1percent to 71.6 percent in the low-risk group, from 54 percent to 92.1 percent in the medium risk and 59.7 percent to 93.1 percent in the high risk group. Conclusions: The perineural invasion in transrectal prostate biopsy is a risk factor for non organo-confined disease.


Subject(s)
Humans , Male , Adult , Middle Aged , Biopsy/methods , Neoplasm Invasiveness/pathology , Prostatic Neoplasms/surgery , Prostatic Neoplasms/pathology , Retrospective Studies , Risk Assessment , Prognosis , Prostatectomy , Sensitivity and Specificity , Predictive Value of Tests
SELECTION OF CITATIONS
SEARCH DETAIL