Hepatitis B flare is a common complication of Chronic Hepatitis B (CHB) and is defined as an increase in HBV viral load associated with abnormal alanine aminotransferases (ALT), the consensus being an ALT≥5xupper limit of normal. The immunopathogenesis is related to induction of inflammatory cells and cytokines by the rise in HBV DNA. There are multiple causes of flares, and they carry the risk of progression to hepatic decompensation and acute-on-chronic liver failure (ACLF) with its associated mortality, potentially requiring liver transplantation. Initial assessment should be exclusion of other causes of liver dysfunction, determine severity, and prognosis. General prognostic models of ACLF are useful but the COSSH-ACLF II score is specific for HBV. Initiation of nucleos(t)ide analogues early is crucial and even in severe HBV flares reduces mortality by 73.6%. Once jaundice and coagulopathy occur, salvage by antivirals is challenging, and such patients should be considered for liver transplantation. However, many patients may not be suitable for transplant or may not have available donor livers as is common in Asia. Recently, there has been increasing evidence of benefit with adjunctive therapies such as corticosteroids and plasma exchange, but this needs to be balanced with the risks and should be considered as rescue therapies in severe HBV flares or ACLF. Liver transplant is the ultimate intervention when these other strategies fail to rescue patients. In summary, HBV flares are clinically serious events that can lead to hepatic decompensation and ACLF but strategies for rescue should be considered before liver transplantation.
Background/Aims Hepatocellular carcinoma (HCC) is a leading cause of cancer mortality worldwide. Despite identification of several biomarkers for HCC diagnosis, challenges such as low sensitivity and intratumoral heterogeneity have impeded early detection, highlighting the need for etiology-specific blood biomarkers.
Methods We generated whole-transcriptome sequencing (WTS) and targeted proteome data from buffy coat and plasma samples from HCC patients. By integrating etiological information on viral infection, we investigated the etiology-specific gene expression landscape at the blood level. Validation of differentially expressed genes (DEGs) was performed using publicly available RNA-seq datasets and qRT‒PCR with AUC analyses.
Results Differential expression analyses with multiomics data revealed distinct gene expression profiles between HBV-associated HCC and nonviral HCC, indicating the presence of etiology-specific blood biomarkers. The identified DEGs were validated across multiple independent datasets, underscoring their utility as biomarkers. Additionally, single-cell RNA-seq analysis of HCC confirmed differences in DEG expression across distinct immune cell types.
Conclusions Our buffy coat WTS data and plasma proteome data may serve as reliable sources for identifying etiology-specific blood biomarkers of HCC and might contribute to discovery of therapeutic targets for HCC across different etiologies.
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Acute-on-chronic liver failure is an acute deterioration of liver function manifesting as jaundice and coagulopathy with the development of ascites, with a high probability of extrahepatic organ involvement and high 28-day mortality. The pathogenesis involves extensive hepatic necrosis, which is associated with severe systemic inflammation and subsequently causes the cytokine storm, leading to portal hypertension, organ dysfunction, and organ failure. These patients have increased gut permeability, releasing lipopolysaccharide (LPS) and damage-associated molecular patterns (DAMPS) in the blood, leading to hyper-immune activation and the secretion of cytokines, followed by immune paralysis, causing the development of infections and organ failure in a proportion of patients. Early detection and the institution of treatment, especially in the "Golden Window" period of 7 days, gives an opportunity for reversal of the syndrome. Scores like the Asian Pacific Association for the Study of the Liver (APASL) ACLF research consortium (AARC) score, a model for end stage liver disease (MELD), and the CLIF Consortium acute-on-chronic liver failure (CLIF-C ACLF) score can help in the prediction of mortality. Treatment strategy includes treatment of acute insult. Patients should be considered for early transplant with MELD score >28, AARC score >10, high-grade hepatic encephalopathy, and in the absence of >2 organ failure or overt sepsis to improve survival of up to 80% at five years. Patients, with no option of transplant, can be treated with emerging therapies like faecal microbial transplant, plasma exchange, etc., which need further evaluation.
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Background/Aims Inflammatory pseudotumor rarely occurs in the liver. However, it is important to discriminate it from malignant hepatic tumor in order to avoid unnecessary surgery. We aimed to elucidate the characteristic features of this disease entity by analyzing our experiences and by reviewing the related literatures. Methods: Fifteen patients were enrolled during a recent three-year period. The patients were pathologically diagnosed with inflammatory pseudotumor of the liver, and their clinical and imaging findings were analyzed retrospectively. Results: Our study population was composed of ten men and five women, and their mean age was 60.3±9.2 years. Their initial diagnoses were inflammatory pseudotumor (n=8), malignant tumors (n=3) and abscess (n=4). Twelve of 15 patients were associated with biliary diseases such as biliary stone, gallbladder cancer, empyema or cholangiocarcinoma. The most common symptom was abdominal pain. The most common CT and MR findings could be summarized as a delayed hyperattenuating mass with an internal hypoattenuating component. The tumors were solitary in 13 patients and multiple in two patients. The lesions regressed spontaneously in seven patients. Four patients were treated by antibiotics and 3 patients by surgical resection. Conclusions: Inflammatory pseudotumor of the liver seems to have relatively common clinical and imaging features, as described above. However, these features are not disease-specific; thus, preoperative histologic confirmation is necessary to avoid unnecessary surgery.