Cathepsin B and Plasma Kallikrein Are Reliable Biomarkers to Discriminate Clinically Significant Hepatic Fibrosis in Patients with Chronic Hepatitis-C Infection.

We aimed to determine the biomarker performance of the proteolytic enzymes cathepsin B (Cat B) and plasma kallikrein (PKa) and transforming growth factor (TGF)-ß to detect hepatic fibrosis (HF) in chronic hepatitis C (CHC) patients. We studied 53 CHC patients and 71 healthy controls (HCs). Hepatic-disease stage was determined by liver biopsies, aminotransferase:platelet ratio index (APRI) and Fibrosis (FIB)4. Hepatic inflammation and HF in CHC patients were stratified using the METAVIR scoring system. Cat-B and PKa activities were monitored fluorometrically. Serum levels of TGF-ß (total and its active form) were determined using ELISA-like fluorometric methods. Increased serum levels of Cat B and PKa were found (p < 0.0001) in CHC patients with clinically significant HF and hepatic inflammation compared with HCs. Levels of total TGF-ß (p < 0.0001) and active TGF-ß (p < 0.001) were increased in CHC patients compared with HCs. Cat-B levels correlated strongly with PKa levels (r = 0.903, p < 0.0001) in CHC patients but did not correlate in HCs. Levels of Cat B, PKa and active TGF-ß increased with the METAVIR stage of HF. Based on analyses of receiver operating characteristic (ROC) curves, Cat B and PKa showed high diagnostic accuracy (area under ROC = 0.99 ± 0.02 and 0.991 ± 0.007, respectively) for distinguishing HF in CHC patients from HCs. Taken together, Cat B and PKa could be used as circulating biomarkers to detect HF in HCV-infected patients.

Successful DAA therapy for chronic hepatitis C reduces HLA-DR on monocytes and circulating immune mediators: A long-term follow-up study.

INTRODUCTION: After DAA treatment for chronic hepatitis C infection, peripheral monocyte subsets from patients who achieved sustained virological response (SVR) reduced compared to healthy control. Improvement in inflammatory parameters and liver stiffness has been observed. However, little is known about the long-term impact of DAA treatment on peripheral monocyte subsets and immune mediators levels. OBJECTIVES: We aimed to examine peripheral monocyte subsets and immune mediators levels in Brazilian chronic HCV patients after long-term successful IFN-free SOF-based treatment. MATERIAL AND METHODS: We analyzed CD14++CD16-, CD14++CD16+ and CD14+CD16++ monocytes and 27 immune mediators by flow cytometry and analysis of multiple secreted proteins assay, respectively, in monoinfected chronic HCV patients receiving IFN-free sofosbuvir-based regimens followed before treatment, at SVR and one year after the end of treatment (1y). RESULTS: Twenty-one biomarkers decreased significantly at 1y and 55-80 % of patients this reduction at 1y. Experimented patients presented a greater modulation of immune mediators at 1y. HLA-DR expression significantly decreased on CD14++CD16- and CD14++CD16+ monocytes at 1y when compared to SVR. CONCLUSIONS: Successful DAA therapy did not modify monocyte subsets frequency but reduced monocyte activation at 1y and sustained the downregulation and restoration of circulating immune mediators, indicating that long-term reversal of inflammation status could occur after HCV eradication.

Liver fibrosis improvement in chronic hepatitis C after direct acting-antivirals is accompanied by reduced profibrogenic biomarkers-a role for MMP-9/TIMP-1.

BACKGROUND AND AIMS: Disturbances in matrix metalloproteinases (MMPs) and corresponding tissue inhibitors (TIMPs) contribute to hepatitis C virus (HCV)-induced fibrosis. This study aimed to determine MMP-9/TIMP-1 levels in addition to MMP-2 and -9 activities; correlating with the improvement of liver fibrosis in patients under direct-acting antiviral (DAA) therapy. METHODS: Clinical and laboratory follow-up were performed before treatment and after 12 weeks post-treatment, referred as sustained viral response (SVR). We evaluated liver function including non-invasive fibrosis measurements; MMP activity by zymography; and MMP-9/TIMP-1 complex, inflammatory and pro-fibrogenic mediators by immunoenzymatic assays. RESULTS: Cohort included 33 patients (59.5 ±â€¯9.3 years, 60.6% females) whose reached SVR and 11 control-paired subjects (42.5 ±â€¯15 years, 54.5% females). Before treatment, HCV patients presented higher MMP-9/TIMP-1 levels (P < 0.05) when compared to controls, and the highest values were observed in patients with fibrosis (P < 0.05). In addition, MMP-9/TIMP-1 levels were significantly reduced after DAA therapy (P < 0.0001) and were associated with profibrogenic biomarkers. No differences were observed for MMP-2 and -9 activities; however, these biomarkers were significantly associated with inflammatory mediators. CONCLUSION: Our data suggest that MMP-9/TIMP-1 complex can be a promising biomarker of active fibrogenesis, being able to identify the interruption of fibrosis progression after HCV eradication.

COVID-19: clinical and laboratory manifestations in novel coronavirus infection / COVID-19: manifestações clínicas e laboratoriais na infecção pelo novo coronavírus

ABSTRACT COVID-19 is a highly contagious disease caused by the coronavirus of severe acute respiratory syndrome 2 (SARS-CoV-2). In 2020, due to the outbreak, it was considered by the World Health Organization (WHO) as a pandemic. The infection caused by the novel coronavirus has high mortality in a small portion of the infected population, especially in elderly, immunosuppressed, diabetic, cardiac, and hypertensive individuals. Many infected are asymptomatic (and may be carriers) or present mild or moderate flu-like symptoms. The most severe clinical picture of COVID-19 is characterized by an inflammatory cytokine storm, with hematological changes and coagulation dysfunction, which can lead to tissue damage and death. Nonspecific laboratory biomarkers may be either increased or decreased as the course of the disease progresses and are often useful in predicting complications of the disease, such as the use of D-dimer and platelet/lymphocyte ratio. Specific laboratory diagnosis is based on the detection of viral ribonucleic acid (RNA) by real-time polymerase chain reaction (RT-PCR) of nasal and oropharyngeal swab samples; it is more effective when performed in the first days after symptom onset. Serological tests are useful in detecting the immune response, since both class M (IgM) and class G (IgG) immunoglobulin antibodies can be detected seven days after the onset of clinical symptoms, and may extend for more than 25 days, although not exempting the individual from remaining infectious, depending on their viral load and clinical presentation. The rational use of specific laboratory markers must respect the disease chronology, and the correct interpretation may provide subsidies for a better management of affected patients, as well as identifying asymptomatic carriers or those with mild symptoms.

RESUMEN La COVID-19 es una enfermedad altamente contagiosa causada por el coronavirus del síndrome respiratorio agudo grave (SARS-CoV-2). En 2002, a causa del brote, fue reconocida como una pandemia por la Organización Mundial de la Salud (OMS). La infección por el nuevo coronavirus provoca alta mortalidad en una pequeña parcela de la población infectada, especialmente en ancianos, pacientes inmunodeprimidos, diabéticos, cardiópatas e hipertensos. Muchos infectados son asintomáticos (y pueden ser portadores) o presentan síntomas leves a moderados, como en un estado gripal. El cuadro clínico de la COVID-19 en la forma más grave es caracterizado por una tormenta inflamatoria de citoquinas, con cambios hematológicos y de la coagulación que pueden llevar a daño tisular y muerte. Pruebas de laboratorio inespecíficas pueden presentar tasas más altas o bajas según el curso de la enfermedad, y muchas veces son útiles en la predicción de complicaciones, como el uso del dímero D y la ratio plaquetas/linfocitos. El diagnóstico de laboratorio específico se basa en la detección del ácido ribonucleico (ARN) viral por reacción en cadena de la polimerasa (PCR) en tiempo real de muestras de hisopado nasal y orofaríngeo; es más efectiva en los primeros días tras el inicio de los síntomas. Pruebas serológicas son útiles para detectar la respuesta inmune, pues tanto los anticuerpos de la inmunoglobulina M (IgM) como de la G (IgG) pueden se detectar siete días después del inicio de los síntomas clínicos, y pueden permanecer por más de 25 días, aunque no eximen al individuo de seguir infeccioso, dependiendo de su carga viral y presentación clínica. El uso racional de los marcadores de laboratorio específicos debe respetar la cronología de la enfermedad, y la interpretación correcta puede proporcionar recursos para un mejor manejo de los pacientes afectados, así como identificar portadores asintomáticos o con pocos síntomas.

RESUMO COVID-19 é uma doença altamente contagiosa provocada pelo coronavírus da síndrome respiratória aguda grave 2 (SARS-CoV-2). Em 2020, devido ao surto, foi caracterizada pela Organização Mundial da Saúde (OMS) como pandemia. A infecção causada pelo novo coronavírus tem alta mortalidade em uma pequena parcela da população infectada, especialmente em indivíduos idosos, imunodeprimidos, diabéticos, cardiopatas e hipertensos. Muitos infectados são assintomáticos (e podem ser portadores) ou apresentam sintomas leves a moderados, semelhantes ao estado gripal. O quadro clínico da COVID-19 na forma mais severa é caracterizado por uma tempestade inflamatória de citocinas, com alterações hematológicas e da coagulação que podem levar ao dano tecidual e morte. Exames laboratoriais inespecíficos podem apresentar-se mais elevados ou diminuídos conforme o curso da doença, e muitas vezes são úteis na predição de complicações, como o uso do D-dímero e a razão plaqueta/linfócitos. O diagnóstico laboratorial específico se baseia na detecção do ácido ribonucleico (RNA) viral por reação em cadeia da polimerase em tempo real (RT-PCR) de amostras de suabe nasal e orofaríngeo; é mais efetivo nos primeiros dias após o início dos sintomas. Testes sorológicos são úteis na detecção da resposta imune, pois tanto os anticorpos da imunoglobulina da classe M (IgM) quanto da classe G (IgG) podem ser detectados após sete dias do início dos sintomas clínicos, podendo se estender por mais de 25 dias, embora não isente o indivíduo de continuar infectante, dependendo de sua carga viral e apresentação clínica. O uso racional dos marcadores laboratoriais específicos deve respeitar a cronologia da doença, e a interpretação correta pode fornecer subsídios para um melhor manejo dos pacientes acometidos, bem como identificar portadores assintomáticos ou com pouco sintomas.

Clinical, laboratorial diagnosis and prophylaxis of measles in Brazil / Diagnóstico clínico, laboratorial e profilático do sarampo no Brasil

ABSTRACT Measles is an acute febrile exanthematic disease of viral etiology, highly contagious, being the cause of morbidity and mortality of children in developing countries, whereas it has become rarer in developed countries due to vaccination. Its differential diagnosis should be made with other childhood viral respiratory diseases such as influenza, rhinovirus and adenovirus, and exanthematic febrile diseases such as rubella, roseola and varicella. In tropical regions, it should be performed with dengue, zika and chikungunya. Its clinical picture presents the following phases: incubation, usually asymptomatic; a prodrome, in which fever, malaise, coryza can occur, besides Koplik's signs; exanthematic, with presence of maculopapular exanthema after the fever condition that progresses to a craniocaudal evolution, with clinical improvement in uncomplicated cases. Common complications are pneumonia, otitis media, keratitis; the rarest are acute disseminated encephalomyelitis and subacute sclerosing panencephalitis. Nonspecific laboratory alterations are seen in the blood count. The specific laboratory diagnosis is based on the detection of viral ribonucleic acid (RNA) [polymerase chain reaction (PCR) of nasal swab samples, oral mucosa or urine]. Immunoglobulin class M (IgM) can be detected during the exanthematous period by enzyme-linked immunosorbent assay (ELISA), and immunoglobulin class G (IgG) throughout the convalescence period, and the detection of specific IgG by the plaque reduction neutralization test may also be performed. The prophylaxis of the disease is based on vaccination in children from 15 months in order to reach about 85% to 95% of the population, what confers herd immunity. Thus, vaccination is the most effective measure in combating measles, since the treatment consists only of clinical and symptomatic support.

RESUMEN El sarampión es una enfermedad exantemática febril aguda de etiología viral altamente contagiosa. Causa morbilidad y mortalidad de niños en países en desarrollo, mientras que se hizo más raro en países desarrollados gracias a la vacunación. El diagnóstico diferencial se hace con otras enfermedades infantiles, como influenza, rinovirus, adenovirus, rubéola, roséola y varicela. En regiones tropicales, incluye dengue, zika y chikungunya. Su cuadro clínico presenta las siguientes fases: incubación - en general asintomática; pródromo - en la cual pueden ocurrir fiebre, malestar y coriza, además de manchas de Koplik; y la exantemática - con presencia de exantema máculo-papular después del cuadro febril, que se disemina desde la cara a tronco y extremidades, con mejora clínica en casos no complicados. Complicaciones comunes son neumonía, otitis media y queratoconjuntivitis; las más raras, encefalomielitis aguda diseminada y panencefalitis esclerosante subaguda. Alteraciones inespecíficas de laboratorio son vistas en el hemograma. El diagnóstico específico de laboratorio se basa en el aislamiento del ácido ribonucleico (ARN) viral (PCR de muestras nasales, mucosa oral u orina). La inmunoglobulina M (IgM) pude ser detectada durante el período exantemático por ensayo por inmunoadsorción ligado a enzimas (ELISA); la inmunoglobulina G (IgG), a lo largo del período de convalecencia, y la detección de IgG específica por la prueba de neutralización por reducción de placa. La profilaxis de la enfermedad se basa en vacunación en niños desde los 15 meses de edad, buscando alcanzar 85%-95% de la población, lo que confiere inmunidad de grupo. La vacunación es la medida más eficaz en el combate al sarampión, puesto que el tratamiento consiste sólo en soporte clínico.

RESUMO O sarampo é uma doença exantemática febril aguda de etiologia viral altamente contagiosa. É causa de morbidade e mortalidade de crianças em países em desenvolvimento, ao passo que se tornou mais rara em países desenvolvidos devido à vacinação. O diagnóstico diferencial deve ser realizado em relação a outras doenças da infância, como influenza, rinovírus, adenoviroses, rubéola, roséola e varicela. Já em regiões tropicais, inclui dengue, vírus da zika e chikungunya. Seu quadro clínico apresenta as seguintes fases: a de incubação - em geral assintomática; a prodrômica - na qual podem ocorrer febre, mal-estar e coriza, além de sinais de Koplik; e a exantemática - com presença de exantema maculopapular após o quadro febril, que progride de forma craniocaudal, com melhora clínica em casos não complicados. Complicações comuns são pneumonia, otite média e ceratoconjuntivite; as mais raras, encefalomielite disseminada aguda e panencefalite esclerosante subaguda. Alterações laboratoriais inespecíficas são vistas no hemograma. O diagnóstico laboratorial específico baseia-se na detecção do ácido ribonucleico (RNA) viral [reação em cadeia da polimerase (PCR) de amostras de swab nasal, mucosa oral ou urina]. Imunoglobulina da classe M (IgM) pode ser detectada durante o período exantemático por ensaio de imunoadsorção enzimática (ELISA) e imunoglobulina da classe G (IgG), ao longo do período de convalescença, podendo também ser realizada a detecção de IgG específica pelo teste de neutralização por redução de placas. A profilaxia da doença é baseada na vacinação em crianças a partir dos 15 meses de idade, visando atingir cerca de 85% a 95% da população, o que confere imunidade de rebanho. A vacinação é a medida mais eficaz no combate ao sarampo, visto que o tratamento consiste apenas em suporte clínico.

Yellow fever: laboratorial diagnosis and clinical manifestations / Febre amarela: diagnóstico laboratorial e manifestações clínicas

ABSTRACT Yellow fever is an infectious disease of acute evolution, initially non-contagious, transmitted by a ribonucleic acid (RNA) virus that belongs to the Flaviviridae family. In the period from December 2016 until March 17, 2017, 1, 561 suspected cases of wild yellow fever were reported to the Ministry of Health in Brazil. Among these cases, 850 (54.8%) remain under investigation, 448 (28.7%) were confirmed and 263 (16.9%) were discarded. Out of the total cases reported, 264 died, 144 (54.5%) were confirmed for the disease, 110 (41.7%) were investigated and 10 (3.8%) were discarded. The case fatality rate among confirmed cases was 32.2%. The specific diagnosis for determining the etiology of infection can be made by demonstrating the humoral response of the antibodies, virus isolation, or histopathological study of the liver. Only through early laboratory diagnosis and epidemiological data supply can government and cooperative organizations establish public policies to combat future disease epidemics, as well as social awareness campaigns.

RESUMO A febre amarela é uma doença infecciosa de evolução aguda, a princípio não contagiosa, transmitida por um vírus do ácido ribonucleico (RNA) que pertence à família Flaviviridae. No período de dezembro de 2016 a 17 de março de 2017, foram notificados ao Ministério da Saúde, 1.561 casos suspeitos de febre amarela silvestre no Brasil. Destes, 850 (54, 8%) permanecem em investigação; 448 (28, 7%) foram confirmados e 263 (16, 9%), descartados. Do total dos casos notificados, 264 evoluíram para óbito, sendo 144 (54, 5%) confirmados para a doença; 110 (41, 7%) em investigação e 10 (3, 8%), descartados. A taxa de letalidade entre os casos confirmados foi de 32, 2%. O diagnóstico específico para determinação da etiologia da infecção pode ser feito por meio da demonstração da resposta humoral dos anticorpos, do isolamento do vírus ou do estudo histopatológico do fígado. Apenas mediante o diagnóstico laboratorial precoce e o abastecimento de dados epidemiológicos é que governo e organizações cooperativas poderão estabelecer políticas públicas de combate a futuras epidemias da doença, bem como campanhas de conscientização social.

Exploring lipid and apolipoprotein levels in chronic hepatitis C patients according to their response to antiviral treatment.

BACKGROUND: Hepatitis C virus is known to be highly dependent of lipid metabolism to infect new cells and replicate. AIMS: To investigate lipid and apolipoprotein profile in chronic HCV patients according to treatment response. METHODS: Patients recruited from the Hepatitis Treatment Center at Niteroi (Brazil) who received interferon (IFN)-based therapies were separated into two groups, those who achieved sustained virological response (SVR) or not (non-SVR). Another group of patients treated with IFN-free direct-acting antiviral (DAA) therapies was followed from before starting the treatment until one year after therapy. Triglycerides, total cholesterol and fractions were determined by colorimetric and/or electrophoresis techniques. Lecithin cholesterol acyltransferase (LCAT) activity and serum levels of apolipoproteins A1, A2, B, C2, C3 and E were assessed by enzymatic and multiplex assays, respectively. RESULTS: We studied 114 patients, and SVR was reached in 28 (39.4%) patients treated with IFN-therapy and in all (100%) patients who received DAA. Non-SVR patients (n = 43) presented altered liver parameters post-treatment. Levels of total cholesterol, LDL-C, VLDL-C and triglycerides were significant higher in SVR group. In contrast, LCAT activity and HDL-C levels were elevated in non-SVR patients. Only apolipoproteins B, C2 and C3 levels were increased in SVR group. The follow-up of SVR-DAA patients (n = 43) revealed a significant and progressive increase in serum levels of total cholesterol, LDL-C, VLDL-C and triglycerides. CONCLUSIONS: After a successful treatment, chronic hepatitis C patients experienced a reestablishment of lipid metabolism. Our results suggest that the monitoring of serum lipids could be a practical and routine laboratory tool to be applied during the treatment follow-up.

Restoring Inflammatory Mediator Balance after Sofosbuvir-Induced Viral Clearance in Patients with Chronic Hepatitis C.

This study aimed at analyzing circulating levels of inflammatory and profibrogenic cytokines in patients with hepatitis C virus (HCV) chronic infection undergoing therapy with direct-acting antiviral agents (DAA) and correlating these immune biomarkers with liver disease status. We studied 88 Brazilian monoinfected chronic hepatitis C patients receiving interferon- (IFN-) free sofosbuvir-based regimens for 12 or 24 weeks, followed-up before therapy initiation and three months after the end of treatment. Liver disease was determined by transient elastography, in addition to APRI and FIB-4 indexes. Analysis of 30 immune mediators was carried out by multiplex or enzymatic immunoassays. Sustained virological response rate was 98.9%. Serum levels of cytokines were increased in HCV-infected patients when compared to control group. CCL-2, CCL-3, CCL-4, CXCL-8, CXCL-10, IL-1ß, IL-15, IFN-γ, IL-4, IL-10, TGF-ß, FGFb, and PAI-1 decreased significantly after antiviral therapy, reaching values similar to noninfected controls. TGF-ß and suPAR levels were associated with fibrosis/cirrhosis. Also, we observed amelioration in hepatic parameters after DAA treatment. Together, our results suggest that viral control induced by IFN-free DAA therapy restores inflammatory mediators in association with improvement in liver function.