Publications by authors named "Gregory Cheng"

Article Synopsis
  • * Recent advancements in targeted therapy and immune-checkpoint inhibitors are now becoming available for treating unresectable HCC and preventing recurrence after curative procedures.
  • * This clinical practice guideline aims to provide updated recommendations from Asia-Pacific experts on systemic therapy for HCC, addressing key questions about patient selection, effective treatments, and management strategies for immunotherapy.
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With the introduction of effective directly acting antiviral agents (DAAs) therapy, control and elimination of hepatitis C virus (HCV) infection is becoming a feasible goal. In Hong Kong, HCV prevalence in general population is 0.3%-0.

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Article Synopsis
  • - The guidelines address the significant issue of hepatitis B reactivation due to immunosuppressive therapy, particularly prevalent in the Asia-Pacific region, leading to serious health complications.
  • - A comprehensive review of relevant literature and expert opinions was conducted to create these guidelines, which stratify the risk of hepatitis B reactivation based on different types of immunosuppressive treatments.
  • - Clinicians are advised to screen all patients for hepatitis B before starting immunosuppressive therapy and to provide preemptive antiviral treatment for those at high risk to prevent severe liver-related complications.
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Background And Aim: The incidence of hepatocellular carcinoma (HCC) decreases significantly in chronic hepatitis C (CHC) patients with sustained virologic response (SVR) after pegylated-interferon plus ribavirin (PR) or direct-acting antiviral (DAAs) therapy. We follow-up a single cohort of CHC patients to identify risk factors associated with HCC development post-SVR.

Method: CHC patients with SVR in Beijing/Hong Kong were followed up at 12-24 weekly intervals with surveillance for HCC by ultrasonography and alpha-fetoprotein (AFP).

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Resistance to therapeutic drugs occurs in virtually all types of cancers, and the tolerance to one drug frequently becomes broad therapy resistance; however, the underlying mechanism remains elusive. Combining a whole whole-genome-wide RNA interference screening and an evolutionary drug pressure model with MDA-MB-231 cells, it is found that enhanced protein damage clearance and reduced mitochondrial respiratory activity are responsible for cisplatin resistance. Screening drug-resistant cancer cells and human patient-derived organoids for breast and colon cancers with many anticancer drugs indicates that activation of mitochondrion protein import surveillance system enhances proteasome activity and minimizes caspase activation, leading to broad drug resistance that can be overcome by co-treatment with a proteasome inhibitor, bortezomib.

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Background And Aim: Cytokine storm has been reported in patients with coronavirus disease 2019 (COVID-19) due to severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection. We examine the incidence of acute on chronic liver failure (ACLF) in COVID-19 patients with pre-existing compensated chronic liver disease (CLD).

Methods: From 20 Jan 2020 to 7 Feb 2020, we studied 140 consecutive COVID-19 patients admitted to either Fuyang Second People's Hospital (FYSPH), Anhui or the Fifth Medical Center of Chinese PLA General Hospital (PLAGH) in Beijing, China.

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Annually, around 850 liver transplantation is performed in Beijing, China. Recently, the new coronavirus pneumonia (COVID-19) caused by 2019 novel coronavirus (2019-nCoV) has affected nearly 200 countries worldwide. 2019-nCov can cause severe lung disease, multiple-organ damage, and significant mortalities.

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Background: We aimed to clarify high-risk factors for coronavirus disease 2019 (COVID-19) with multivariate analysis and establish a predictive model of disease progression to help clinicians better choose a therapeutic strategy.

Methods: All consecutive patients with COVID-19 admitted to Fuyang Second People's Hospital or the Fifth Medical Center of Chinese PLA General Hospital between 20 January and 22 February 2020 were enrolled and their clinical data were retrospectively collected. Multivariate Cox regression was used to identify risk factors associated with progression, which were then were incorporated into a nomogram to establish a novel prediction scoring model.

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Current first-line treatments for immune thrombocytopenia (ITP) usually have transient effects and sustained platelet response off therapy remains low. We evaluated whether eltrombopag plus pulsed dexamethasone as first-line therapy can increase the proportion of patients maintaining platelet counts >50 × 10 /l for a prolonged period without further ITP therapy. Treatment consisted of eltrombopag 25-75 mg daily according to platelet response for 12 weeks plus dexamethasone, 40 mg daily for four consecutive days every four weeks for 1-3 courses.

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Human embryonic stem cell (hESC) derived mesenchymal stem cells (EMSC) are efficacious in treating a series of autoimmune, inflammatory, and degenerative diseases in animal models. However, all the EMSC derivation methods reported so far rely on two-dimensional (2D) culture systems, which are inefficient, costive and difficult for large-scale production. HESC, as an unlimited source, can be successively propagated in spheroids.

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The genetic bases of many common diseases have been identified through genome-wide association studies in the past decade. However, the application of this approach on public healthcare planning has not been well established. Using Macau with population of around 650,000 as a basis, we conducted a pilot study to evaluate the feasibility of population genomic research and its potential on public health decisions.

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Background: Patients with myelodysplastic syndrome or acute myeloid leukaemia who are thrombocytopenic and unable to receive disease-modifying therapy have few treatment options. Platelet transfusions provide transient benefit and are limited by alloimmunisation. Eltrombopag, an oral thrombopoietin receptor agonist, increases platelet counts and has preclinical antileukaemic activity.

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Chronic immune thrombocytopenia (ITP) is an autoimmune disorder characterized by a low platelet count that has persisted for more than 12 months. Patients may be asymptomatic but those with severe disease may have significant morbidity and require treatment. Corticosteroids and intravenous immunoglobulin are recommended as first-line treatments.

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In this study, a novel green microencapsulation system was used to develop Phyllanthus urinaria (PU) extract containing microcapsules. Agar was used with gelatin as the wall matrix materials of microcapsules to prevent the use of toxic crosslinker formaldehyde. Microencapsulated PU extract was developed to improve the potential antifungal activities of PU water extracts.

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Patients with chronic immune thrombocytopenia may have bleeding resulting from low platelet counts. Eltrombopag increases and maintains hemostatic platelet counts; however, to date, outcome has been reported only for treatment lasting ≤ 6 months. This interim analysis of the ongoing open-label EXTEND (Eltrombopag eXTENded Dosing) study evaluates the safety and efficacy of eltrombopag in 299 patients treated up to 3 years.

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The preparation of chiral tetrahydroquinolines using Ir-catalysed asymmetric hydrogenation and their possible cytotoxic potential anti-cancer activity were reported. Both of the in vitro cytotoxicity assay on a series of human cancer cell lines including A549 small cell lung cancer, MDA-MB-231 breast cancer, SaoS2 sacroma, SKHep-1 hepatoma and Hep3B hepatocellular carcinoma as well as in vivo animal model using Hep3B hepatocellular tumour xenograft on athymic nude mice suggest that 1,2,3,4-tetrahydroquin-8-ol is a potential anti-tumour alkaloid which may be further developed as a novel cancer chemotherapeutic agent.

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