ABSTRACT
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic has a tremendous impact on the health of millions of people worldwide. Unfortunately, those suffering from previous pathological conditions are more vulnerable and tend to develop more severe disease upon infection with the new SARS-CoV-2. This coronavirus interacts with the angiotensin-converting enzyme 2 receptor to invade the cells. Recently, another receptor, neuropilin-1 (NRP-1), has been reported to amplify the viral infection. Interestingly, NRP-1 is expressed in nonparenchymal liver cells and is related to and upregulated in a wide variety of liver-related pathologies. It has been observed that SARS-CoV-2 infection promotes liver injury through several pathways that may be influenced by the previous pathological status of the patient and liver expression of NRP-1. Moreover, coronavirus disease 2019 causes an inflammatory cascade called cytokine storm in patients with severe disease. This cytokine storm may influence liver sinusoidal-cell phenotype, facilitating viral invasion. In this review, the shreds of evidence linking NRP-1 with liver pathologies such as hepatocellular carcinoma, liver fibrosis, nonalcoholic fatty liver disease and inflammatory disorders are discussed in the context of SARS-CoV-2 infection. In addition, the involvement of the infection-related cytokine storm in NRP-1 overexpression and the subsequent increased risk of SARS-CoV-2 infection are also analyzed. This review aims to shed some light on the involvement of liver NRP-1 during SARS-CoV-2 infection and emphasizes the possible involvement this receptor with the observed liver damage.
Subject(s)
COVID-19 , Cytokine Release Syndrome , Humans , Liver , Neuropilin-1 , SARS-CoV-2ABSTRACT
INTRODUCCIÓN: Infliximab (IFX) es efectivo en la colitis ulcerosa (CU) y en obtener la curación de la mucosa (CM). Se conoce poco el papel que juega la CM en la evolución posterior de la enfermedad y qué ocurre una vez se interrumpe el tratamiento. OBJETIVOS: Conocer las características y evolución de pacientes con CU tratados con IFX, que, tras obtener remisión profunda, suspenden el tratamiento. MÉTODOS: Estudio observacional, prospectivo, de pacientes con CU moderada a grave, corticorresistente/corticodependiente, naïves a anti-TNF. Pauta de administración: IFX: 5mg/kg a 0-2-6 semanas y cada 8 después, hasta semana 54. En los pacientes que alcanzaron la CM, el tratamiento se interrumpió, con seguimiento posterior de al menos 20 meses. Remisión clínica (RC): puntuación Mayo < 2; respuesta clínica: disminución de 3 puntos; CM: puntuación Mayo 0-1. Remisión profunda: paciente con RC y CM. RESULTADOS: De los 21 pacientes incluidos, 19 completaron el estudio (colectomía = 1; no respondedor = 1). Edad media: 47,8 años. CU: grave (n = 13); moderada (n = 6), la mayoría, corticorresistentes (n = 11). Un 57,8% recibieron tratamiento combinado con inmunosupresores y en el 31,5% el tratamiento se intensificó. Semana 54: 16 pacientes (84,2%) presentaron respuesta clínica, 13 (68,4%) RC y 12 (63,2%) remisión profunda. De ellos, 6 (50%) tuvieron un nuevo episodio de CU y 3 (25%) fueron tratados de nuevo con IFX. Estos últimos, en las 12 primeras semanas de la retirada del fármaco y todos respondieron de nuevo. El 91,7% de los pacientes permanecían libres de IFX a las 8 semanas y el 75% a las 12, manteniéndose en esta situación durante el tiempo de seguimiento. Ninguno de los pacientes precisó ingreso ni cirugía durante el seguimiento. CONCLUSIONES: Los pacientes con CU que obtuvieron RM con IFX, tras suspender el tratamiento presentaron nuevo brote en la mitad de los casos y el 25% precisaron tratamiento de nuevo con IFX
INTRODUCTION: Infliximab (IFX) is effective in treating ulcerative colitis (UC) and in achieving mucosal healing (MH). Little is known about the role of mucosal healing (MH) in the subsequent evolution of the disease and the consequences of discontinuing treatment. AIMS: To evaluate the characteristics and evolution of patients with UC treated with IFX who discontinued treatment after disease remission. METHODS: Observational, prospective study of patients with moderate to severe UC, corticosteroid-resistant/corticosteroid-dependent, naïve to anti-TNF. IFX administration regimen: 5 mg/kg at 0-2-6 weeks and every 8 weeks thereafter until week 54. In patients achieving MH, IFX was discontinued and the patients were followed-up for at least 20 months. Clinical remission (CR): mayo score < 2; Clinical response: decrease in mayo score of 3 points; MH: mayo score 0-1; Deep remission: patient with CR and MH. RESULTS: Of the 21 patients enrolled, 19 completed the study (colectomy, n = 1; non-responder, n = 1). Mean age: 47.8 years. UC: severe (n = 13) and moderate (n = 6); most patients (n = 11) were steroid-resistant; 57.8% received combined treatment with immunosuppressants, and 31.5% intensified treatment. Week 54: 16 patients (84.2%) showed clinical response, 13 (68.4%) showed CR, and 12 (63.2%) deep remission. Of these, 6 (25%) presented a new episode of UC, and in 3 (25%) IFX was restarted within 12 weeks of discontinuation, with all patients responding. Of the total sample, 91.7% remained IFX-free at week 8, and 75% at week 12, with no remission during follow-up. None of the patients required hospitalization or surgery. CONCLUSIONS: Half of patients with deep remission of UC with IFX therapy presented a new episode after treatment discontinuation, and in 25% IFX therapy was restarted
Subject(s)
Humans , Colitis, Ulcerative/drug therapy , Infliximab/therapeutic use , Withholding Treatment , Remission Induction/methods , Disease-Free Survival , Treatment Outcome , Risk FactorsABSTRACT
INTRODUCTION: Infliximab (IFX) is effective in treating ulcerative colitis (UC) and in achieving mucosal healing (MH). Little is known about the role of mucosal healing (MH) in the subsequent evolution of the disease and the consequences of discontinuing treatment. AIMS: To evaluate the characteristics and evolution of patients with UC treated with IFX who discontinued treatment after disease remission. METHODS: Observational, prospective study of patients with moderate to severe UC, corticosteroid-resistant/corticosteroid-dependent, naïve to anti-TNF. IFX administration regimen: 5 mg/kg at 0-2-6 weeks and every 8 weeks thereafter until week 54. In patients achieving MH, IFX was discontinued and the patients were followed-up for at least 20 months. Clinical remission (CR): mayo score <2; Clinical response: decrease in mayo score of 3 points; MH: mayo score 0-1; Deep remission: patient with CR and MH. RESULTS: Of the 21 patients enrolled, 19 completed the study (colectomy, n = 1; non-responder, n = 1). Mean age: 47.8 years. UC: severe (n = 13) and moderate (n = 6); most patients (n = 11) were steroid-resistant; 57.8% received combined treatment with immunosuppressants, and 31.5% intensified treatment. Week 54: 16 patients (84.2%) showed clinical response, 13 (68.4%) showed CR, and 12 (63.2%) deep remission. Of these, 6 (25%) presented a new episode of UC, and in 3 (25%) IFX was restarted within 12 weeks of discontinuation, with all patients responding. Of the total sample, 91.7% remained IFX-free at week 8, and 75% at week 12, with no remission during follow-up. None of the patients required hospitalization or surgery. CONCLUSIONS: Half of patients with deep remission of UC with IFX therapy presented a new episode after treatment discontinuation, and in 25% IFX therapy was restarted.
