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    Original Article Open Access
    PCSK9 and APOA4: The Dynamic Duo in TMAO-induced Cholesterol Metabolism and Cholelithiasis
    Chao Shi, Jingjing Yu, Ziang Meng, Dongxu Lu, Haoran Ding, Haijun Sun, Guangxin Shi, Dongbo Xue, Xianzhi Meng
    Journal of Clinical and Translational Hepatology, Published online February 11, 2025. doi:10.14218/JCTH.2024.00403
    Abstract
    Cholesterol synthesis and gallstone formation are promoted by trimethylamine-N-oxide (TMAO), a derivative of trimethylamine, which is a metabolite of gut microbiota. However, the [...] Read more.

    Cholesterol synthesis and gallstone formation are promoted by trimethylamine-N-oxide (TMAO), a derivative of trimethylamine, which is a metabolite of gut microbiota. However, the underlying mechanisms of TMAO-induced lithogenesis remain incompletely understood. This study aimed to explore the specific molecular mechanisms through which TMAO promotes gallstone formation.

    Enzyme-linked immunosorbent assays were used to compare serum concentrations of TMAO, apolipoprotein A4 (APOA4), and proprotein convertase subtilisin/kexin type 9 (PCSK9) between patients with cholelithiasis and normal controls. A murine model of TMAO-induced cholelithiasis was employed, incorporating assays of gallstone weight and bile cholesterol content, along with RNA sequencing of murine hepatic tissue. A TMAO-induced AML12 hepatocyte line was constructed and transfected with targeted small interfering RNAs and overexpression plasmids. In vivo and in vitro experiments were performed to determine the expression and regulation of genes related to cholesterol metabolism.

    Serum TMAO and PCSK9 levels were elevated, whereas APOA4 levels were reduced in patients with cholelithiasis. Furthermore, our murine model demonstrated that TMAO upregulated hepatic expression of PCSK9, 3-hydroxy-3-methylglutaryl-CoA reductase, and ATP-binding cassette sub-family G member 5/8, while reducing APOA4 expression, thereby modulating cholesterol metabolism and promoting lithogenesis. PCSK9 and APOA4 were identified as key regulatory genes in the cholesterol metabolic pathway. PCSK9 knockdown increased APOA4 expression, while APOA4 overexpression led to reduced PCSK9 expression.

    TMAO upregulated hepatic PCSK9 expression and reduced APOA4 expression, initiating a feedback loop that dysregulated cholesterol metabolism and promoted lithogenesis.

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    Original Article Open Access
    GTF3C2 Promotes the Proliferation of Hepatocellular Carcinoma Cells through the USP21/MEK2/ERK1/2 Pathway
    Yani Wu, Yingnan Yang, Youju Zhang, Qiuran Xu, Dongsheng Huang, Kangsheng Tu
    Journal of Clinical and Translational Hepatology, Published online February 11, 2025. doi:10.14218/JCTH.2024.00386
    Abstract
    General transcription factor IIIC subunit 2 (GTF3C2) is one of the polymerase III transcription-related factors. Previous studies have revealed that GTF3C2 is involved in regulating [...] Read more.

    General transcription factor IIIC subunit 2 (GTF3C2) is one of the polymerase III transcription-related factors. Previous studies have revealed that GTF3C2 is involved in regulating cell proliferation. However, the role of GTF3C2 in hepatocellular carcinoma (HCC) remains unclear. This study aimed to determine its expression, biological function, and mechanism in HCC.

    The expression of GTF3C2 in HCC and non-tumor tissues, along with its clinical significance, was investigated using public databases and clinical samples. Reverse transcription-quantitative polymerase chain reaction and Western blot assays were performed to detect the expression of GTF3C2, ubiquitin specific peptidase 21 (USP21), mitogen-activated protein kinase 2 (MEK2), extracellular signal-regulated kinase 1/2 (ERK1/2), and p-ERK1/2 in cells. A luciferase reporter assay was conducted to explore the regulatory effect of GTF3C2 on USP21 transcription. Cell Counting Kit-8, 5-ethynyl-2′-deoxyuridine, and colony formation assays were performed to assess HCC cell proliferation. Subcutaneous injection of HCC cells into nude mice was used to evaluate tumor growth in vivo.

    GTF3C2 expression was upregulated in HCC tissues and was positively correlated with advanced tumor stages and high tumor grades. HCC patients with high GTF3C2 expression had significantly worse survival outcomes. Knockdown of GTF3C2 suppressed the proliferation of Hep3B and HCCLM3 cells, while overexpression of GTF3C2 facilitated the proliferation of SNU449 and Huh7 cells. GTF3C2 promoted USP21 expression by activating its transcription, which subsequently increased the levels of MEK2 and p-ERK1/2 in HCC cells. Overexpression of both USP21 and MEK2 counteracted the GTF3C2 knockdown-induced inactivation of the ERK1/2 pathway. Moreover, GTF3C2 promoted HCC cell proliferation in vitro and tumor growth in vivo by regulating the USP21/MEK2/ERK1/2 pathway.

    Upregulation of GTF3C2 is frequently observed in HCC tissues and predicts poor prognosis. GTF3C2 promotes HCC cell proliferation via the USP21/MEK2/ERK1/2 pathway.

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    Review Article Open Access
    Beyond the Cure: Navigating Hepatocellular Risk and Surveillance after Hepatitis C Eradication in the Direct-acting Antiviral Era
    Chencheng Xie, Ashwani K. Singal
    Journal of Clinical and Translational Hepatology, Published online February 8, 2025. doi:10.14218/JCTH.2024.00499
    Abstract
    Direct-acting antivirals (DAAs) have dramatically changed the landscape of chronic hepatitis C virus (HCV) treatment and significantly reduced the risk of HCV-related hepatocellular [...] Read more.

    Direct-acting antivirals (DAAs) have dramatically changed the landscape of chronic hepatitis C virus (HCV) treatment and significantly reduced the risk of HCV-related hepatocellular carcinoma (HCC) after achieving sustained virologic response. However, the risk of HCC persists, particularly in patients with pre-treatment cirrhosis or fibrosis stage 3 (F3), even after DAA-induced viral eradication. While professional guidelines agree on the need for surveillance in cirrhotic patients, there is no consensus regarding surveillance for the pre-treatment F3 population following HCV eradication. The risk of HCC in the F3 population falls below the threshold for cost-effective surveillance. However, co-existing risk factors—such as diabetes, hepatic steatosis, alcohol use, advanced age, and elevated alpha-fetoprotein levels—may warrant reconsideration of HCC surveillance in this group. This underscores the need for an individualized, risk-based approach to HCC surveillance. This review provided a simplified algorithm to assist clinicians in managing patients with HCV after DAA-induced sustained virologic response.

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    Review Article Open Access
    Environmental Triggers’ Involvement in the Development of Type 1 Diabetes Mellitus
    Tajudeen Olanrewaju Yahaya, Umar Usman Liman, Caleb Dikko Obadiah, Zafira Illo Zakari, Daniel Anyebe, Boniface Gomo Clement, Balkisu Marafa Muhammad
    Exploratory Research and Hypothesis in Medicine, Published online July 27, 2022. doi:10.14218/ERHM.2022.00051
    Abstract
    The huge burden of type 1 diabetes mellitus (T1DM) has been a source of concern globally since the Industrial Revolution in the 18th–19th centuries. To this end, studies have shown [...] Read more.

    The huge burden of type 1 diabetes mellitus (T1DM) has been a source of concern globally since the Industrial Revolution in the 18th–19th centuries. To this end, studies have shown that certain environmental changes that accompanied the Revolution may have increased the risk and burden of the disease in genetically predisposed individuals. However, documented studies that synthesize these environmental triggers are scarce. As a result, the current study was conceived to synthesize the environmental triggers of T1DM to boost public awareness. Relevant information was retrieved from reputable academic databases; namely, Scopus, PubMed, SpringerLink, and Embase. The results showed that chemical exposure, viral infection, gut microbiome disruption, vitamin and mineral deficiencies, inadequate or exclusive breastfeeding, as well as early exposure to infant feeding formulas could increase the risk and burden of T1DM in genetically predisposed individuals. As a consequence, these triggers could compromise the expression of certain genes involved in insulin synthesis and immune function, such as the human leukocyte antigen (HLA), insulin (INS), cytotoxic T lymphocyte-associated antigen 4 (CTLA-4), and protein tyrosine phosphatase non-receptor type 22 (PTPN22) genes. This would result in a dysfunctional immune system in which immune cells, such as T-cells and B-cells and molecules, such as cytokines would attack self-tissues, thus causing autoimmunity of the pancreatic beta cells. Environmental triggers could also induce the T1DM pathophysiology by modifying the epigenome of the mentioned genes. Furthermore, some epigenetic changes could be reversed, which would infer that treatment procedures that would include the pathophysiology of the environmental triggers could be more effective.

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    Original Article Open Access
    Overexpression of RBM34 Promotes Tumor Progression and Correlates with Poor Prognosis of Hepatocellular Carcinoma
    Wei Wang, Rui Zhang, Ning Feng, Longzhen Zhang, Nianli Liu
    Journal of Clinical and Translational Hepatology, Published online July 13, 2022. doi:10.14218/JCTH.2022.00166
    Abstract
    Emerging evidence suggests that RNA-binding motif (RBM) proteins are involved in hepatocarcinogenesis and act either as oncogenes or tumor suppressors. The objective of this study [...] Read more.

    Emerging evidence suggests that RNA-binding motif (RBM) proteins are involved in hepatocarcinogenesis and act either as oncogenes or tumor suppressors. The objective of this study was to investigate the role of RBM34, an RBM protein, in hepatocellular carcinoma (HCC).

    We first examined the expression of RBM34 across cancers. The correlation of RBM34 with clinicopathological features and the prognostic value of RBM34 for HCC was then investigated. Functional enrichment analysis of RBM34-related differentially expressed genes (DEGs) was performed to explore its biological function. RNA sequencing (RNA-seq) was applied to identify downstream genes and pathways affected upon RBM34 knockout. The correlation of RBM34 with immune characteristics was also analyzed. The oncogenic function of RBM34 was examined in in vitro and in vivo experiments.

    RBM34 was highly expressed in hepatocellular carcinoma and correlated with poor clinicopathological features and prognosis. RBM34 was positively associated with tumor immune cell infiltration, biomarkers of immune cells, and immune checkpoint expression. A positive correlation was also observed between RBM34, T cell exhaustion, and regulatory T cell marker genes. Knockout of RBM34 significantly inhibited cell proliferation, migration, and xenograft tumor growth, and sensitized HCC cells to sorafenib treatment. RBM34 inhibition reduced FGFR2 expression and affected PI3K-AKT pathway activation in HCC cells.

    Our study suggests that RBM34 may serve as a new prognostic marker and therapeutic target of HCC.

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    Original Article Open Access
    Naringenin is a Potential Immunomodulator for Inhibiting Liver Fibrosis by Inhibiting the cGAS-STING Pathway
    Li Chen, Siwei Xia, Shuqi Wang, Yuanyuan Zhou, Feixia Wang, Zhanghao Li, Yang Li, Desong Kong, Zili Zhang, Jiangjuan Shao, Xuefen Xu, Feng Zhang, Shizhong Zheng
    Journal of Clinical and Translational Hepatology, Published online April 28, 2022. doi:10.14218/JCTH.2022.00120
    Abstract
    Naringenin is an anti-inflammatory flavonoid that has been studied in chronic liver disease. The mechanism specific to its antifibrosis activity needs further investigation This [...] Read more.

    Naringenin is an anti-inflammatory flavonoid that has been studied in chronic liver disease. The mechanism specific to its antifibrosis activity needs further investigation This study was to focused on the cyclic guanosine monophosphate-adenosine monophosphate synthase (cGAS) pathway in hepatic stellate cells and clarified the antifibrosis mechanism of naringenin.

    The relationship between the cGAS-stimulator of interferon genes (STING) pathway and liver fibrosis was analyzed using the Gene Expression Omnibus database. Histopathology, immunohistochemistry, fluorescence staining, Western blotting and polymerase chain reaction were performed to assess gene and protein expression levels associated with the cGAS pathway in clinical liver tissue samples and mouse livers. Molecular docking was performed to evaluate the relationship between naringenin and cGAS, and western blotting was performed to study the expression of inflammatory factors downstream of cGAS in vitro.

    Clinical database analyses showed that the cGAS-STING pathway is involved in the occurrence of chronic liver disease. Naringenin ameliorated liver injury and liver fibrosis, decreased collagen deposition and cGAS expression, and inhibited inflammation in carbon tetrachloride (CCl4)-treated mice. Molecular docking found that cGAS may be a direct target of naringenin. Consistent with the in vivo results, we verified the inhibitory effect of naringenin on activated hepatic stellate cells (HSCs). By using the cGAS-specific agonist double-stranded (ds)DNA, we showed that naringenin attenuated the activation of cGAS and its inflammatory factors affected by dsDNA. We verified that naringenin inhibited the cGAS-STING pathway, thereby reducing the secretion of inflammatory factors by HSCs to ameliorate liver fibrosis.

    Interrupting the cGAS-STING pathway helped reverse the fibrosis process. Naringenin has potential as an antihepatic fibrosis drug.

    Full article
Special Features

Call for Papers for Special Issue 'Updates of Cytopathology Reporting Systems'

Journal: Journal of Clinical and Translational Pathology
Special Issue: Updates of Cytopathology Reporting Systems
Submission deadline: November 30, 2023
Publication date: An article will be published online as soon as it is accepted

Call for Papers for Special Issue 'Frontier research on the toxicity and efficacy of Chinese medicine'

Journal: Future Integrative Medicine
Special Issue: Frontier research on the toxicity and efficacy of Chinese medicine
Submission deadline: June 30, 2023
Publication date: An article will be published online as soon as it is accepted

Call for Papers for Special Issue ‘New Translational Challenges in Primary Biliary Cholangitis’

Journal: Journal Clinical and Translational Hepatology
Special Issue: New Translational Challenges in Primary Biliary Cholangitis
Submission deadline: June 30, 2023
Publication date: An article will be published online as soon as it is accepted

Call for Papers for Special Issue ‘A Spotlight on Progress and Pitfalls in NAFLD/MAFLD Studies, 2022’

Journal: Journal of Clinical and Translational Hepatology
Special Issue: A Spotlight on Progress and Pitfalls in NAFLD/MAFLD Studies, 2022
Submission deadline: March 30, 2023
Publication date: An article will be published online as soon as it is accepted

Call for Papers for Special Issue 'Comparative study of traditional medicine in the world'

Journal: Future Integrative Medicine
Special Issue: Comparative study of traditional medicine in the world
Submission deadline: June 30, 2023
Publication date: An article will be published online as soon as it is accepted

Call for Papers for Special Issue 'Therapeutic effects of herbal medicines on neurological impairment and related mental disorders based on the evidence of clinical and basic studies'

Journal: Future Integrative Medicine
Special Issue: Therapeutic effects of herbal medicines on neurological impairment and related mental disorders based on the evidence of clinical and basic studies
Submission deadline: June 30, 2023
Publication date: An article will be published online as soon as it is accepted

Call for Papers for Special Issue ‘Immunoregulatory Mechanisms of Herbal Medicines in Cancer and Infectious Diseases’

Journal: Future Integrative Medicine
Special Issue: Immunoregulatory Mechanisms of Herbal Medicines in Cancer and Infectious Diseases
Submission deadline: June 30, 2023
Publication date: An article will be published online as soon as it is accepted
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