Development and optimization of Eva1 (MPZL2) targeting chimeric antigen receptor T cells

BACKGROUND

Whereas chimeric antigen receptor gene modified T (CAR-T) cell therapy has been clinically applied to malignant lymphomas and multiple myeloma, CAR-T cell therapy for solid tumors has so far not reached clinical application. Epithelial V-like antigen 1 (Eva1), transcribed from myelin protein zero-like 2 (MPZL2), is a small surface protein highly expressed on various tumor cells. We selected Eva1 as a novel solid tumor-target antigen because of its broad expression across various tumor types. The purpose of the present study is to develop and optimize CAR-T cells targeting Eva1.

METHOD

We prepared various humanized single chain variable fragment sequences based on a mouse anti-human Eva1 monoclonal antibody. We constructed six humanized Eva1CAR-Ts and selected one that maintained specificity and good cellular proliferation after antigen stimulation. We further optimized the length of the extracellular spacer domain and the choice of the intracellular domain in vitro and in two different xenograft mouse models.

RESULTS

We confirmed Eva1 expression on various tumor cell lines by flow cytometry and analysis of public database, but we also observed that normal monocytes weakly expressed Eva1. A combination of short spacer domain and 4-1BB or CD79A/CD40 intracellular domain provided higher treatment efficacy both in vitro and in vivo. The cytokine release on autologous monocyte stimulation to Eva1CAR-T cells was comparable to that on autologous B cell stimulation to CD19CAR-T cells. Humanized Eva1CAR-T cells demonstrated excellent therapeutic efficacy by infusing a single dose of Eva1CAR-T cells (1×106) in both NCI-H1975 lung cancer and CFPAC-1 pancreatic cancer cell line grafted model.

CONCLUSIONS

In summary, these data suggest that humanized Eva1CAR-T has promising therapeutic potential for the treatment of various Eva1-positive solid tumors. Regarding on-target/off-tumor recognition, further detailed analyses of the Eva1CAR-T cell responses to normal tissues are needed.

Survival in patients receiving reduced dose intensity of bevacizumab for unresectable hepatocellular carcinoma

IMBrave 150 established atezolizumab and bevacizumab as the new standard for advanced hepatocellular carcinoma (HCC) treatment. However, the trial reported significant adverse events leading to bevacizumab dose interruptions or discontinuations. This retrospective, real-world analysis evaluated the effect of reduced bevacizumab dose intensity on clinical outcomes in 354 patients receiving first-line combination immunotherapy for advanced HCC. To minimize immortal time bias, only those on therapy for over 3 months were included. Of 219 patients included in the landmark analysis, 52 received a reduced dose intensity of bevacizumab. The median relative dose intensity (RDTI) of bevacizumab was 75% (range 9.1-96.9%). There was no significant difference in progression-free survival (11.2 vs. 14.8 months, p = 0.5) or overall survival (20.4 vs. 26.8 months, p = 0.1) between those receiving 100% vs. reduced RDTI. Exploratory analysis showed that even doses under 75% had no survival impact. Treatment-related grade 3/4 adverse events occurred more frequently with RDTI (30.7% vs. 15.5%). Reduced bevacizumab doses do not impact survival.

Liver transplantation for hepatocellular carcinoma following immunotherapy

PURPOSE OF REVIEW

To explore the emerging use of immune checkpoint inhibitors (ICIs) in hepatocellular carcinoma (HCC) patients eligible for liver transplantation (LT), particularly as bridging and downstaging therapies. This review also addresses the clinical challenges of integrating ICIs into transplant protocols, including graft rejection, immune-related toxicities, and gaps in evidence.

RECENT FINDINGS

ICIs have shown potential as bridging and downstaging therapies before LT, with multicentric studies reporting 75.6% successful downstaging, 85% 3-year post-LT survival, and 7.2% rejection-related mortality. A washout interval >94 days and older age have been identified as protective factors against allograft rejection. Combining locoregional therapies with ICIs has proven effective in the EMERALD-1 and LEAP-012 trials, which demonstrated improved progression-free survival (15.0 and 14.6 months, respectively) with ICI-TACE combinations. Similarly, the STAR-FIT phase II trial, combining TACE, SBRT, and avelumab, showed a 42% complete response rate and 12% conversion to curative therapy. Toxicity and rejection risk remain major challenges.

SUMMARY

ICIs represent a promising tool for expanding transplant eligibility in HCC, but their integration into LT pathways remains complex. Safety concerns, particularly regarding timing and immune modulation, require careful evaluation. Prospective studies and biomarker development are needed to guide clinical decision-making. Novel therapies such as CAR-T cells may offer more targeted approaches in the future.

Oncogenic Signalling Pathways in Cancer Immunotherapy: Leader or Follower in This Delicate Dance?

Immune checkpoint inhibitors have become a mainstay of treatment in many solid organ malignancies. Alongside this has been the rapid development in the identification and targeting of oncogenic drivers. The presence of alterations in oncogenic drivers not only predicts response to target therapy but can modulate the immune microenvironment and influence response to immunotherapy. Combining immune checkpoint inhibitors with targeted agents is an attractive therapeutic option but overlapping toxicity profiles may limit the clinical use of some combinations. In addition, there is growing evidence of shared resistance mechanisms that alter the response to immunotherapy when it is used after targeted therapy. Understanding this complex interaction between oncogenic drivers, targeted therapy and response to immune checkpoint inhibitors is vital for selecting the right treatment, at the right time for the right patient. In this review, we summarise the preclinical and clinical evidence of the influence of four common oncogenic alterations on immune checkpoint inhibitor response, combination therapies, and the presence of shared resistance mechanisms. We highlight the common resistance mechanisms and the need for more randomised trials investigating both combination and sequential therapy.

The impact of COVID-19 pandemic on hospitalization rate, clinical impairment and mortality of cirrhotic patients

The COVID-19 pandemic caused widespread disruption to global healthcare systems, necessitating the reallocation of resources to address the immediate demands. This reorganization had significant repercussions on the management of chronic diseases, including cirrhosis. We sought to provide a comprehensive picture of the COVID-19 impact on monthly hospitalization rates of cirrhotic patients at Local Health Board 1 hospitals in the Abruzzo Region, Italy. Using the International Classification of Diseases, Ninth Revision, we identified cases of alcohol-related, nonalcohol-related, biliary, and decompensated cirrhosis. We analyzed 957 Hospital Discharge Records from January 1 to December 31, 2019 (pre-pandemic), and from January 1 to December 31, 2022 (post-pandemic). We evaluated patients' clinical impairment, length of stay, and mortality before and after the pandemic. We identified 494 hospitalizations for nonalcohol-related cirrhosis and 310 for alcohol-related cirrhosis. As key findings, hospitalizations for nonalcohol-related cirrhosis decreased (69% vs. 48%; p < .0001), while hospitalizations for alcohol-related cirrhosis increased (31% vs. 52%; p < .0001), in the post-pandemic period. Additionally, there was a significant rise in decompensated patients with alcohol-related cirrhosis post-COVID (77% vs. 65%; p = .0216). Mortality risk increased for both nonalcohol- (11% vs. 18.5%; p = .0176) and alcohol-related cirrhosis (7.7% vs. 18%; p = .0059) in the post-pandemic era. The increase in hospitalizations for alcohol-related cirrhosis is alarming and likely to have a prolonged impact on the natural history of liver diseases. There is an urgent need to reduce alcohol consumption at the population level. Continued awareness and personalized follow-up are essential for guaranteeing the standard of care during health emergencies.

The Combined Use of Lenvatinib and Locoregional Therapies for the Management of Hepatocellular Carcinoma

Hepatocellular carcinoma (HCC) is a commonly diagnosed malignancy, with the treatment for transplant-ineligible localized disease traditionally relying on locoregional therapies, such as surgical resection, transarterial chemoembolization (TACE), and transarterial radioembolization (TARE). Systemic therapy has historically been reserved for advanced, unresectable HCC. However, lenvatinib, an oral multikinase inhibitor, has recently gained traction as part of a multimodal approach for localized HCC in combination with locoregional treatments. An upfront TACE or TARE can induce tumor hypoxia, leading to the upregulation of hypoxia-inducible factor-1 alpha (HIF-1α) and vascular endothelial growth factor (VEGF), which promotes tumor angiogenesis and progression. The rationale for combining lenvatinib with a locoregional therapy is to enhance tumor shrinkage while preserving liver function before a definitive intervention. Clinical trials, such as TACTICS and LAUNCH, have demonstrated improved outcomes with this approach. Additionally, retrospective studies, including those incorporating immune checkpoint inhibitors, have reported further benefits. This review explores the combination of lenvatinib with various locoregional modalities, including TARE, microwave ablation (MWA), and radiofrequency ablation (RFA), highlighting their indications and clinical outcomes. Furthermore, we discuss the ongoing and upcoming clinical trials investigating the integration of systemic agents with locoregional therapies for intermediate-stage HCC, including EMERALD-1, EMERALD-3, LEAP-012, and CheckMate 74W.

New platinum derivatives selectively cause double-strand DNA breaks and death in naïve and cisplatin-resistant cholangiocarcinomas

BACKGROUND & AIMS

Patients with cholangiocarcinoma (CCA) have poor prognosis. Current cisplatin-based first-line chemotherapy offers limited survival benefits. Cisplatin induces single-strand DNA breaks, activating DNA repair mechanisms that diminish its effectiveness. Here, we present the design, chemical synthesis, and therapeutic evaluation of a new generation of chemotherapeutic agents (Aurkines) with unique polyelectrophilic properties. These agents cause a high frequency of double-strand DNA breaks, bypassing DNA repair, and promoting cancer cell death.

METHODS

Two novel compounds, Aurkine 16 and Aurkine 18, were designed and evaluated for their antitumor effects in both naïve and cisplatin-resistant CCA cells, cancer-associated fibroblasts (CAFs), healthy cholangiocytes, and in vivo models.

RESULTS

Aurkines effectively induced double-strand DNA breaks, leading to increased DNA damage and elevated levels of reactive oxygen species, resulting in greater cytotoxicity than cisplatin in CCA cells. Phosphoproteomic and molecular analysis revealed that cisplatin activates DNA repair pathways, while Aurkines primarily induce apoptosis. Importantly, Aurkines also triggered apoptosis in cisplatin-resistant CCA cells and CAFs without harming healthy cholangiocytes. Additionally, Aurkines demonstrated cytotoxicity in other cisplatin-resistant cancers, such as breast and ovarian cancer. This tumor selectivity results from reduced uptake, increased efflux, and compact chromatin structure in normal cells, limiting Aurkine-DNA interactions. In vivo, Aurkines inhibited the growth of subcutaneous naïve and cisplatin-resistant CCA tumors, as well as orthotopic tumors in immunocompetent mice promoting antitumor immune cell recruitment, without any adverse events. Transport studies revealed that Aurkines were selectively taken up by OCT1, OCT3, CTR1, and OATP1A2, whereas only CTR1 transported cisplatin.

CONCLUSIONS

Aurkines represent promising therapeutic drugs for both naïve and cisplatin-resistant cancers due to their unique polyelectrophilic properties and selective targeting of malignant cells.

IMPACT AND IMPLICATIONS

This study introduces a novel therapeutic strategy designed to induce frequent double-strand DNA breaks selectively in both naïve and cisplatin-resistant cancer cells, without evident toxic side effects at therapeutic doses. This approach may settle the basis for new strategies to overcome the critical challenge of drug resistance in cancer treatment, and has the potential to be a breakthrough not only for the treatment of biliary tumors but also for other cancers.

Revisiting resectability of biliary tract cancers, in the triplet drug therapy era with immune checkpoint inhibitors

Biliary tract cancers (BTCs) include intrahepatic, perihilar, distal cholangiocarcinoma, gallbladder cancer, and sometimes papillary Vater cancer. The incidence of BTCs varies worldwide (0.3-85.0/100,000 population). In Japan, the incidence is lowest, but it is increasing (22,000 cases/ year). The 5-year overall survival (OS) in patients with localized BTC is approximately 60%, which is better than that in liver or pancreatic cancer, but is < 5% in patients with metastatic cancers. Surgery requires liver and pancreas surgery with vascular reconstruction, and is associated with a high perioperative mortality rate (> 2%) relative to other cancer surgeries (< 1%). As an adjuvant therapy, fluorouracil prodrugs are effective for improving OS (hazard ratio [HR] 0.69-0.81); however, in patients who receive major hepatectomy, the completion rate is reportedly low (60%). Since 2010, gemcitabine + cisplatin (GC) has become the first-line therapy for unresectable lesions. Subsequently, in 2023-2024 three triplet regimens were reported: GC + S-1(tegafur-gimeracil-oteracil), GC + durvalumab (an anti-PD-L1 antibody), and GC + pembrolizumab (an anti-PD-1 antibody). HRs for OS were 0.79-0.83, objective response rates were 27-42% (GC, 15-29%), and tumor control rates were 75-85% (GC, 62-83%) with small increases in adverse events. In this review, considering the eligibility criteria of currently ongoing neoadjuvant studies, we report two borderline resectable cases with a discussion on resectability. Owing to the high-risk nature of the surgery and to avoid early recurrence due to subclinical metastasis during postoperative recovery, these three triplet regimens for unresectable tumors may change the concept of resectability in BTC.

Advances in Locoregional and Systemic Treatments for Hepatocellular Carcinoma

Significant advances have occurred in the locoregional and systemic therapy landscape for hepatocellular carcinoma (HCC), with the most notable being the introduction of immune checkpoint inhibitor (ICI) combinations. ICI combinations have significantly improved the overall survival of patients with unresectable HCC, affording median survival over 2 years and long-term survival exceeding 5 years in a subset of patients. Accordingly, there has been increased interest in the earlier application of systemic therapies, including (neo)adjuvant therapy in the perioperative setting or in combination with intra-arterial therapies. However, recent data failed to demonstrate improved recurrence-free survival with use of adjuvant ICI therapy. Conversely, 2 trials showed improved progression-free survival when ICI therapies were combined with transarterial chemoembolization, although data regarding the impact on overall survival are still immature. These improved outcomes raise several new questions, including which patients with liver-localized HCC should receive systemic therapy, how should this be sequenced or combined with other available therapies, and how to manage those patients with marked responses, including consideration of liver transplantation. These questions are often determined on a case-by-case basis and best made in a multidisciplinary manner considering several factors, including tumor burden, degree of liver dysfunction, performance status, and patient's long-term goals of care.

Pathogenesis and Systemic Treatment of Hepatocellular Carcinoma: Current Status and Prospects

Hepatocellular carcinoma (HCC) remains one of the major threats to human health worldwide. The emergence of systemic therapeutic options has greatly improved the prognosis of patients with HCC, particularly those with advanced stages of the disease. In this review, we discussed the pathogenesis of HCC, genetic alterations associated with the development of HCC, and alterations in the tumor immune microenvironment. Then, important indicators and emerging technologies related to the diagnosis of HCC are summarized. Also, we reviewed the major advances in treatments for HCC, offering insights into future prospects for next-generation managements.

Targeting immune checkpoints in hepatocellular carcinoma therapy: toward combination strategies with curative potential

Hepatocellular carcinoma (HCC) is a primary liver cancer characterized by poor immune cell infiltration and a strongly immunosuppressive microenvironment. Traditional treatments have often yielded unsatisfactory outcomes due to the insidious onset of the disease. Encouragingly, the introduction of immune checkpoint inhibitors (ICIs) has significantly transformed the approach to HCC treatment. Moreover, combining ICIs with other therapies or novel materials is considered the most promising opportunity in HCC, with some of these combinations already being evaluated in large-scale clinical trials. Unfortunately, most clinical trials fail to meet their endpoints, and the few successful ones also face challenges. This indicates that the potential of ICIs in HCC treatment remains underutilized, prompting a reevaluation of this promising therapy. Therefore, this article provides a review of the role of immune checkpoints in cancer treatment, the research progress of ICIs and their combination application in the treatment of HCC, aiming to open up avenues for the development of safer and more efficient immune checkpoint-related strategies for HCC treatment.

SENP3 induced HADHA deSUMOylation enhances intrahepatic cholangiocarcinoma chemotherapy sensitivity via fatty acid oxidation

Chemoresistance contributes to poor outcomes in patients with intrahepatic cholangiocarcinoma (ICC). This study aimed to explore the mechanisms underlying chemotherapy resistance and to develop strategies that can sensitize the chemotherapy. Patient derived organoids (PDOs) drug screening and Lipidomics profiling were performed to investigate the chemoresistance mechanism. Through multi-strategy analysis, we found that SENP3 enhanced chemotherapy sensitivity in a SUMO system dependent manner. Mechanistically, chemotherapy resistance increased METTL3 expression, which regulated SENP3 mRNA stability through YTHDF2-dependent m6A methylation modifications. SENP3 interacted with HADHA and catalyzed its deSUMOylation at two lysine residues. Specifically, SUMOylation and ubiquitination exhibited crosstalk at the same modification sites on HADHA, influencing its protein stability and, consequently, regulating fatty acid oxidation (FAO) levels. The physical interaction of SENP3, HADHA, and USP10 provides a novel molecular mechanism for the abnormal activation of FAO pathway. The lipid metabolism-targeting drug could be a promising therapeutic strategy for sensitizing ICC to chemotherapy.

Dose-response relationships in Y90 resin microsphere radioembolization for patients with hepatocellular carcinoma: insights from a Brazilian cohort

OBJECTIVE

To evaluate the relationship between the absorbed dose and radiological response in patients with hepatocellular carcinoma undergoing resin microsphere radioembolization to enhance treatment precision and potentially adjust protocols for better outcomes.

METHODS

This single-center retrospective study was conducted at a quaternary care center in Brazil and comprised 27 patients with 58 target lesions treated between November 2014 and April 2023. The patients' dosimetric profiles were analyzed using advanced imaging software to assess post-treatment clinical and radiological responses. This study explored the correlation between the absorbed doses and tumor objective responses using statistical analyses to confirm the findings.

RESULTS

Higher absorbed doses were significantly associated with improved objective responses in the target lesions. The analysis demonstrated that achieving higher dosimetric thresholds correlated with better clinical outcomes, suggesting that a dose-response relationship is essential to optimize treatment protocols.

CONCLUSION

These findings emphasize the importance of personalized dosimetry in managing hepatocellular carcinoma using resin microsphere radioembolization. By quantifying the absorbed dose and understanding its impact on tumor response, treatment strategies can be tailored to enhance efficacy and potentially shift palliative treatments toward curative outcomes. This study provides a crucial foundation for dosimetric adjustment and highlights the need for further research in this area, particularly in Brazil.

Gastroenterology/Hepatology: What You May Have Missed in 2024

This article highlights selected major advances in gastroenterology and hepatology from 2024 that are relevant for internal medicine specialists. In colorectal cancer (CRC) screening, new developments include a head-to-head comparison of different fecal immunochemical tests and a new blood-based DNA screening test, benefits and harms of artificial intelligence-assisted colonoscopy, and adenoma detection rate improvement and risk for cancer. Treatment options for metabolic dysfunction-associated steatotic liver disease now include resmetirom, a recently approved drug for treatment of patients with moderate-to-severe fibrosis, and liver transplantation may now be an option in patients with unresectable colorectal liver metastases. Also featured are new data on the efficacy of indomethacin and pancreatic stent placement for prevention of pancreatitis after endoscopic retrograde cholangiopancreatography and news on the efficacy and safety of zastaprazan, a new potassium-competitive acid blocker for reflux esophagitis. Finally, a recent randomized trial is highlighted that has dispelled concerns about potential harms of proton-pump inhibitors for stress ulcer prophylaxis in patients receiving invasive mechanical ventilation.

Molecular Testing and Targeted Therapies in Hepatobiliary Cancers: A Review

Importance

Hepatobiliary cancers are heterogeneous and molecularly complex. Recent advances in next-generation sequencing (NGS) have enhanced the understanding of their molecular landscape and enabled deployment of biomarker-based gene- and immune-targeted therapies. This review examines the role of molecular testing and targeted therapies in these malignant neoplasms.

Observations

Patients with hepatobiliary cancers have poor outcomes. Precision oncology studies have shown that while many common molecular alterations are not currently targetable in hepatocellular carcinoma (HCC), a large number of actionable alterations characterize biliary tract cancers (BTCs), with several therapies now approved by the US Food and Drug Administration. Immunotherapy is increasingly adopted in clinical practice, either as monotherapy or combined with cytotoxic chemotherapy, for both HCC and BTCs. Moreover, multiple solid cancer tumor-agnostic therapies are approved (larotrectinib, entrectinib, and repotrectinib for NTRK fusions; selpercatinib for RET fusions; dabrafenib and trametinib combination for BRAF V600E mutations; dostarlimab or pembrolizumab for tumors with high microsatellite instability and pembrolizumab for tumor mutation burden ≥10 mutations/megabase), highlighting the need for NGS as well as ERBB2 (formerly HER2) immunohistochemistry (IHC) (with the recent approval of solid tissue-agnostic deruxtecan trastuzumab for ERBB2-positive [IHC 3+] cancer) across cancers. N-of-1 clinical trials using customized drug combinations matched to the tumor's molecular profile have yielded encouraging results and provide a promising framework for future clinical trial design.

Conclusions and Relevance

Molecular testing and gene- and immune-targeted therapies are transforming hepatobiliary cancer treatment. Tumor-agnostic and N-of-1 clinical trials have challenged traditional clinical trial paradigms and provide the foundation for truly personalized oncology for patients with these aggressive cancers. Further work is needed to determine how to leverage these novel approaches into the management of operable disease.

Imetelstat in myeloid malignancies: current data and future directions

INTRODUCTION

Telomerase reactivation allows cancer cells to maintain telomere length and evade senescence, making it an appealing therapeutic target. Imetelstat, an antisense oligonucleotide, is the first clinically effective telomerase inhibitor approved by the FDA and the European Commission for treating anemia in transfusion-dependent low-risk myelodysplastic syndromes (MDS).

AREAS COVERED

Sources for this review were identified through searches of PubMed, ClinicalTrials.gov, and conference abstracts. This review highlights the pharmacology, efficacy, and ongoing trials of imetelstat in treating MDS, myelofibrosis, essential thrombocythemia, and other malignancies. In the IMerge trial, imetelstat induced durable transfusion independence in heavily transfused LR-MDS patients. Pilot trials in myelofibrosis suggest imetelstat's potential disease-modifying properties and survival benefit, warranting further studies of imetelstat as a monotherapy or in combination therapies. Imetelstat can cause thrombocytopenia, leukopenia, elevated liver enzymes, and infusion reactions, which are mostly reversible but may rarely lead to fatal events.

EXPERT OPINION

Future clinical trials in LR-MDS should focus on optimal sequencing and combination strategies for imetelstat with other agents, and identifying biomarkers that can predict response. Monitoring real-world outcomes will offer valuable insights into imetelstat's safety and efficacy in patient populations underrepresented in clinical trials. Imetelstat's role in other malignancies, especially myelofibrosis, is being explored.

[Frozen sections in hepatobiliary surgery]

Complete removal of the tumor (R0 resection) is one of the most important prognostic factors for overall and recurrence-free survival in patients with hepatobiliary malignancies. Accordingly, the intraoperative confirmation of tumor-free resection margins is of central importance. At the same time, despite extensive preoperative diagnostics intraoperative findings can arise that require immediate histological clarification. For example, the discovery of peritoneal carcinomatosis or previously unknown intrahepatic metastases often leads to the termination of the operation and thus to a change in the oncological concept. In addition, the estimation of the local tumor spread, particularly in the case of biliary tumors related to the liver hilum, is sometimes difficult based on preoperative imaging, so that a timely intraoperative assessment of tissue samples is necessary to confirm the resectability. The possibility of intraoperative frozen section diagnostics is, therefore, of particular importance, especially in complex surgical interventions in the hepatobiliary area.

Hepatic arterial infusion chemotherapy combined with lenvatinib and immune checkpoint inhibitor versus lenvatinib for advanced hepatocellular carcinoma: a multicenter study with propensity score and coarsened exact matching

PURPOSE

Hepatic arterial infusion chemotherapy (HAIC) combined with lenvatinib (Len) and immune checkpoint inhibitor (ICI) in treating advanced hepatocellular carcinoma (HCC) still needs further confirmation. We aimed to evaluate the efficacy of HAIC combined with Len and ICI (HAIC + Len + ICI) versus Len alone in advanced HCC.

METHODS

A total of 290 patients in Len group and 349 patients in HAIC + Len + ICI group were analysed. Propensity score matching (PSM), inverse probability treatment weighting (IPTW), and coarsened exact matching (CEM) analyses were used to balance the bias between two groups. Mediation analysis of treatment type in survival was performed for analysis.

RESULTS

The median progression-free survival (PFS) was 5.9 ± 0.2 months in Len group and 9.2 ± 0.5 months in HAIC + Len + ICI group. The HAIC + Len + ICI group demonstrated significantly better PFS than the Len group across the entire cohort (hazard ratio [HR], 0.50; 95% CI 0.43-0.60; P < 0.001). This advantage in PFS was sustained in the PSM, IPTW, and CEM cohorts. HAIC + Len + ICI group also showed better overall survival (OS) than the Len group (HR, 0.38; 95% CI 0.31-0.46; P < 0.001). The OS was also superior in the PSM, IPTW, and CEM cohorts. The objective response rate (ORR) in HAIC + Len + ICI group was twice as high as that in Len group. Further mediation analysis showed tumor response at 3 and 6 months had different mediation effect on survival.

CONCLUSIONS

HAIC combined with Len and ICI showed improved better OS and PFS than Len alone. This triple therapy could be considered as a first-line treatment for advanced HCC.

New frontiers in the pharmacological management of biliary tract carcinomas: the emerging role of drug conjugates

INTRODUCTION

Biliary tract cancer (BTC) is a human malignancy with a poor prognosis. However, significant progress has been made in understanding the molecular mechanisms of carcinogenesis, leading to the development of targeted therapy strategies in recent years. The challenge now is to develop new therapeutic concepts to further increase the efficacy of BTC treatments in the coming years.

AREAS COVERED

This review covers the emerging and advanced approaches of highly sophisticated antibody-drug conjugates (ADCs) and non-ADCs, particularly in relation to BTC. Additionally, the potential advantages and disadvantages of ADCs and non-ADCs regarding toxicities, bioavailability, and efficacy are presented and discussed.

EXPERT OPINION

Given the poor prognosis of BTCs, new targeted and precision therapy strategies using drug conjugates - with and without antibodies as drug carriers - have the potential to overcome the limitations of conventional chemotherapy by improving treatment specificity and efficacy while reducing systemic toxicity. However, several open questions remain regarding ADCs and non-ADCs, including chemical design, drug delivery, related diagnostic and therapeutic biomarkers, and combinatory application strategies.

Evaluation of surrogate endpoints in phase III randomized control trials of advanced hepatocellular carcinoma treated with immune checkpoint inhibitors

PURPOSE

Overall survival (OS) is recommended as a gold standard endpoint but has some limitations. We aimed to finding more effective surrogate endpoints for advanced hepatocellular carcinoma (HCC) treated with immune checkpoint inhibitors (ICIs).

METHODS

Three online databases were searched for randomized control trials (RCTs) on HCC, published between January 2015 and July 2023, that evaluated ICIs and reported progression-free survival (PFS), objective response rate (ORR), disease control rate (DCR), and OS. The correlation between the potential surrogate endpoints and OS was evaluated at the trial, arm, and patient levels. The prediction models were validated in single-arm or non-RCTs. Individual data were collected from a real-world (RW) cohort with advanced HCC underwent ICI monotherapy at three tertiary medical centers in China.

RESULTS

Ten RCTs (6023 participants) with 11 comparisons were included. PFS had a moderately significant association with OS (R2 = 0.50, p = 0.014). ORR, DCR, and OS showed weak correlations. On limiting the analysis to ICI monotherapy studies, the correlations of OS with PFS became stronger (R2 = 0.85, p = 0.02). The RW cohort also verified that PFS was closely related to OS when patient received with ICI monotherapy.

CONCLUSION

PFS are recommended as surrogate markers in patients with advanced HCC treated with ICI monotherapy.

EORTC consensus recommendations on the optimal management of colorectal cancer liver metastases

Patients with colorectal cancer liver metastases have long represented a unique and thoroughly investigated population. Nevertheless, the optimal management of these is still controversial with a number of open questions which are only partially addressed by available studies and existing guidelines. The European Organisation for Research and Treatment of Cancer (EORTC) Gastrointestinal Tract Cancer Group (GITCG) sought to fill this knowledge gap and promoted the development of a European consensus on this subject. By using the Delphi methodology and leveraging a multidisciplinary team of 43 international experts, including gastrointestinal oncologists, hepatobiliary surgeons, interventional radiologists, radiation oncologists, radiologists, nuclear medicine physicians and pathologists from 12 European countries, 34 practical recommendations and two consensus statements were proposed. These cover varying aspects of the optimal management of colorectal cancer liver metastases such as baseline imaging, selection criteria for liver-directed therapies, treatment strategies, assessment of treatment response, follow-up, care delivery, clinical research and future perspectives. This roadmap document is intended to complement national and international guidelines, and to provide practical guidance for clinicians and multidisciplinary teams, ultimately promoting practice standardisation, optimal management and better patient outcomes across Europe. Also, it provides a unique opportunity to highlight grey areas and unmet needs, and to give a strategic direction to future research in the field by identifying topics where there is no consensus among experts.

Response evaluation and tumor shrinkage pattern post-SBRT for renal cell carcinoma

PURPOSE

Despite the promising application of stereotactic body radiotherapy (SBRT) in renal cell carcinoma (RCC), the optimal time and method for assessing tumor responses to SBRT remain unclear. We aimed to compare the utility of Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 and modified RECIST (mRECIST) in RCC response assessment and clarify the tumor shrinkage pattern post-SBRT.

MATERIALS AND METHODS

We retrospectively studied patients with RCC treated with SBRT at our institution between November 2016 and December 2021. Baseline and follow-up images were evaluated using RECIST 1.1 and mRECIST. Landmark analyses were conducted to assess the association between local control and tumor response status evaluated using the above two criteria.

RESULTS

Ninety-one RCC patients with 103 primary or metastatic lesions were included. Objective response rates (ORRs) were higher and pseudoprogression was less commonly assessed by mRECIST than by RECIST 1.1 within each time period. The median shrinkage rate of bone lesions was much lower using RECIST 1.1 than that using mRECIST (-0.8 vs -1.7 cm/year). According to both criteria, the ORR tended to be stable on the 9-12 months post-SBRT. Patients with a tumor response at 9-12 months had a lower probability of infield recurrence using mRECIST (P = 0.047), this was not observed using RECIST 1.1 (P = 0.061).

CONCLUSION

mRECIST results in an earlier and more pronounced response evaluation compared to RECIST 1.1 in patients with RCC treated with SBRT. Nine to twelve months post-SBRT may serve as an early landmark for tumor response evaluation by mRECIST.

Efficacy and Toxicity of Pemigatinib in Advanced Cholangiocarcinoma Harboring FGFR Fusions or Rearrangements: A Systematic Review and Meta-analysis

BACKGROUND

The efficacy and safety of pemigatinib in advanced cholangiocarcinoma (aCCA) were presented in phase I-II trials and retrospective reports, with small sample sizes and variable results.

METHODS

A systematic literature search included studies investigating the efficacy/safety of pemigatinib in aCCA harboring FGFR fusions/rearrangements. Primary outcomes were objective response rate (ORR) and treatment-related adverse events (AEs). A pooled proportion meta-analysis was performed.

RESULTS

Three hundred and twenty-seven patients in eight studies were included (three phase-II, one phase-I/II, two phase-I, and two retrospective). In the pooled analyses, the median age was 58.9 years (95% confidence interval (CI): 51.9-65.8); 33.4% (95% CI: 28.1-39.0) were male. Pemigatinib was the second-line treatment in 58.5% (95% CI: 52.7-64.1) and was beyond second-line in the remaining. ORR was 42.2% (95% CI: 35.9-48.7) (I2:48.4%) and disease control rate (DCR) was 86.5% (95% CI: 81.6-90.5) (I2: 58.8%). Median progression-free survival (PFS) was 7.8 months (95% CI: 6.2-9.4) (I2: 11.6%). Two studies reported overall survival (OS) (median 17.5 and 17.1 months). The most common AEs (any grade) were hyperphosphatemia (46%), dysgeusia (33.2%), alopecia (31.4%), fatigue (30.9%), stomatitis (28.5%), and diarrhea (27.5%). Cumulative eye and nail toxicities were observed in 32.5% and 40.9%, and retinal detachment in 5.5%.

CONCLUSION

This analysis emphasizes the FGFR alteration testing and pemigatinib use in the second-line and beyond treatment of aCCA.

REGISTRATION ID (PROSPERO)

CRD42024627459.

[Hepatocellular carcinoma: Histological and molecular classifications]

Hepatocellular carcinoma (HCC) is the most common primary malignant liver tumour, with a poor prognosis, ranking third for cancer mortality worldwide. HCC is a morphologically and molecularly heterogeneous tumour. This update aims to address this heterogeneity by describing the different histological and molecular subtypes of HCC. Morphologically, eight subtypes have been described according to the WHO classification: steatohepatitic, macrotrabecular massive (MTM), clear cell, chromophobe, scirrhous, fibrolamellar, lymphocyte-rich and neutrophil-rich. Other HCCs are classified as non-specific (not otherwise specified or NOS). These subtypes may be associated with a different prognosis, particularly the MTM, which displays a poorer survival than the other subtypes. Genomically, most HCCs present mutations in the TERT promoter, while other mutations occured later in carcinogenesis, such as TP53 and CTNNB1. TP53 mutated HCCs are associated with a poor prognosis and the MTM subtype. From a transcriptomic standpoint, two classifications are particularly noteworthy, as they are associated with both prognosis (proliferative vs. non-proliferative classification) and clinical, morphological and genomic tumour characteristics (G1-G6 classification). In conclusion, the morphological heterogeneity of HCC, directly linked to molecular heterogeneity, is associated with prognosis. This strongly supports the specification of the different HCC subtypes in our reports.

Role of Liver Transplant in Primary and Secondary Liver Malignancies

Hepatocellular carcinoma (HCC) and cholangiocarcinoma are the primary hepatic malignancies with established pathways to transplantation and model for end-stage liver disease (MELD) exception points. Other tumors managed with liver transplantation (LT) include hepatic epithelioid hemangioendothelioma and fibrolamellar HCC. LT for metastatic neuroendocrine tumor has been established with patient selection criteria and a path to MELD exception points. Additionally, recent data on LT for patients with unresectable hepatic colorectal metastases demonstrate increasingly encouraging initial results.

Adaptive promising zone design for cancer immunotherapy with heterogeneous delayed treatment effect

Indirect mechanisms of cancer immunotherapies result in delayed treatment effects that vary among patients. Consequently, the use of the log-rank test in trial design and analysis can lead to significant power loss and pose additional challenges for interim decisions in adaptive designs. In this paper, we describe patients' survival using a piecewise proportional hazard model with random lag time and propose an adaptive promising zone design for cancer immunotherapy with heterogeneous delayed effects. We provide solutions for calculating conditional power and adjusting the critical value for the log-rank test with interim data. We divide the sample space into three zones - unfavourable, promising, and favourable -based on re-estimations of the survival parameters, the log-rank test statistic at the interim analysis, and the initial and maximum sample sizes. If the interim results fall into the promising zone, the sample size is increased; otherwise, it remains unchanged. We show through simulations that our proposed approach has greater overall power than the fixed sample design and similar power to the matched group sequential trial. Furthermore, we confirm that critical value adjustment effectively controls the type I error rate inflation. Finally, we provide recommendations on the implementation of our proposed method in cancer immunotherapy trials.

Genetic Insights Into Hemorrhagic Stroke and Vascular Malformations: Pathogenesis and Emerging Therapeutic Strategies

Brain arteriovenous malformations (AVMs), cerebral cavernous malformations (CCMs), and intracranial aneurysms are major causes of hemorrhagic stroke, yet noninvasive therapies to prevent growth or rupture are lacking. Understanding the genetic basis of these malformations is critical for uncovering underlying mechanisms, developing targeted prevention strategies, and identifying novel therapeutic targets. This review highlights the causal genes and signaling pathways in AVMs, CCMs, and intracranial aneurysms, noting both their commonalities and differences. For AVMs, somatic mutations in the RAS (rat sarcoma virus)/MAPK (mitogen-activated protein kinase) and MAPK/ERK (extracellular signal-regulated kinase) pathway are key, particularly in sporadic cases, whereas hereditary conditions like hereditary hemorrhagic telangiectasia and capillary malformation-AVM involve the TGF-β (transforming growth factor β), Ephrin receptor, and angiopoietin-VEGF (vascular endothelial growth factor) signaling pathways. In CCMs, pathways affecting endothelial junctions and vascular stability, such as the ROCK (RhoA/Rho-associated coiled-coil containing kinases) pathway, play a central role. Although the genetic drivers of intracranial aneurysms are more diverse and less clearly linked to specific pathways, there is some overlap with genes in the TGF-β and endothelial function pathways seen in AVMs and CCMs. Emerging therapies for AVMs and CCMs include MAPK/ERK inhibitors, anti-VEGF treatments, and RhoA/ROCK inhibitors, showing potential in preclinical models. Due to the genetic overlap, these advancements may also offer future therapeutic strategies for intracranial aneurysms. As personalized medicine progresses, the development of reliable biomarkers, such as the candidate biomarker VEGF for AVMs and CCMs, will be crucial for guiding treatment decisions. In conclusion, ongoing research into genetic pathways holds promise for novel therapeutic targets that could transform the management of vascular malformations and reduce the risk of hemorrhagic stroke.

CD96: immunoregulation and its role and prospect in immunotherapy of primary hepatocellular carcinoma

Recently, immune checkpoint inhibitors have been widely used in the treatment of advanced liver cancer. Immune checkpoints are a type of molecules that play an important role in the self-regulation of the immune system. In tumor immunity, their activation by immune checkpoints leads to the inhibition of effector lymphocyte activation or the mediation of cytotoxic T cell dysfunction, resulting in immune escape. These immune checkpoints include programmed death receptor 1 (PD-1) and its ligand PD-L1, as well as cytotoxic T lymphocyte-associated protein 4 (CTLA-4) and others. Immune checkpoint inhibitors block the interaction between immune checkpoint receptors and ligands, thereby relieving the immune suppression caused by immune checkpoints, and reactivating immune cells to exert antitumor effects. With the continuous progress of immunotherapy research, drugs targeting PDL-1, PD-1, and CTLA-4 have played an important role in clinical treatment. However, some patients still cannot benefit from immunotherapy; therefore, multitarget immunotherapy is an important way to improve the response rate of immunotherapy. CD96 is one of the members of the immunoglobulin superfamily receptors, which mainly functions by regulating natural killer cells and CD8+ T cells, and is expected to become a new generation of immune checkpoints. This article reviews the molecular structure of CD96, its role in tumor immunity, and its application in hepatocellular carcinoma, hoping to provide reference for related research.

Real-world outcomes of fluorouracil-based second-line therapy in patients with advanced biliary tract cancer refractory to gemcitabine and cisplatin-based treatment

Background

The prognosis for patients with advanced biliary tract cancer (BTC) who have not responded to gemcitabine and cisplatin (GP)-based therapy is dismal. Fluorouracil (5-FU)-based chemotherapy could be considered for those patients who are refractory to GP-based treatments. Our study aimed to evaluate the real-world efficacy and safety of 5-FU-based chemotherapy for BTC patients who had progressed after gemcitabine-based treatment.

Methods

This study analyzed patients from Seoul St. Mary's Hospital and St. Vincent's Hospital with advanced BTC who had previously failed treatment with GP-based chemotherapy. From June 2020 and May 2024, these patients received 5-FU-based chemotherapy as a second-line treatment. The 5-FU-based systemic treatments encompassed 5-FU, leucovorin, and oxaliplatin (FOLFOX); 5-FU, leucovorin, and liposomal irinotecan (Nal-IRI/FL); and 5-FU, leucovorin, irinotecan, and oxaliplatin (FOLFIRINOX). Our investigation focused on evaluating the survival outcomes and safety profiles of each regimen within this cohort.

Results

In our analysis of 147 patients, the primary tumor sites were distributed with 56 (38.1%) having intrahepatic cholangiocarcinoma, 51 (34.7%) with extrahepatic cholangiocarcinoma, and 40 (27.2%) with gallbladder cancer. Regarding the 5-FU-based regimens, 57 patients (38.8%) were treated with FOLFOX, 56 (38.1%) with Nal-IRI/FL, and 34 (23.1%) with FOLFIRINOX. The median progression-free survival (PFS) and overall survival (OS) were 2.3 months (95% confidence interval (CI), 2.0-2.6) and 4.8 months (95% CI, 3.8-5.8), respectively. Poor performance status and higher histologic grade were associated with worse PFS and OS, while female gender and prior surgery were linked to improved OS. FOLFOX and Nal-IRI/FL demonstrated comparable efficacy, with a median OS of 5.4 months (95% CI, 3.5-7.3) for FOLFOX and 4.7 months (95% CI, 2.6-6.9) for Nal-IRI/FL, and no significant differences were observed across subgroups. Grade 3 or higher neutropenia and biliary events were less frequent with FOLFOX, which also showed a lower incidence of adverse events and higher relative dose intensity than Nal-IRI/FL or FOLFIRINOX.

Conclusion

In patients with advanced BTC who failed GP treatment, the FOLFOX regimen demonstrated comparable efficacy, and a more favorable safety profile compared to other 5-FU-based treatments. Given its favorable toxicity profile in a real-world setting, FOLFOX should be considered a standard second-line treatment option.

Harnessing immunotherapy for hepatocellular carcinoma: Principles and emerging promises

HCC is considered as one of the leadin causes of death worldwide, with the ability of resistance towards therapeutics. Immunotherapy, particularly ICIs, have provided siginficant insights towards harnessing the immune system. The present review introduces the concepts and possibilities of immunotherapy for HCC treatment, emphasizing its underlying mechanisms and capacity to enhance patient results, focusing on both pre-clinical and clinical insights. The functions of TME and immune evasion mechanisms typical of HCC would be evaluated along with how contemporary immunotherapeutic approaches are designed to address these challenges. Furthermore, the clinical application of immunotherapy in HCC is discussed, emphasizing recent trial findings demonstrating the effectiveness and safety of drugs. In addition, the problems caused by immune evasion and resistance would be discussed to increase potential of immunotherapy along with combination therapy.

Single-Cell Transcriptomic Analysis Reveals an Aggressive Basal-Like Tumor Cell Subpopulation Associated With Poor Prognosis in Intrahepatic Cholangiocarcinoma

BACKGROUND AND AIM

Intrahepatic cholangiocarcinoma (ICC) is the second most common primary liver cancer whose incidence is increasing globally. However, the high tumor heterogeneity of ICC restricts the efficacy of available systematic therapies. We aim to dissect the tumor heterogeneity of ICC utilizing high-resolution single-cell RNA sequencing to identify novel therapeutic targets.

METHODS

We performed single-cell RNA sequencing (scRNA-seq) of 26 tumor samples from 23 ICC patients and spatial transcriptomic sequencing of six tumor sections from six ICC patients. Bulk RNA-seq data from two public datasets were used for validation. Additionally, immunohistochemical staining and multiplex immunofluorescence staining were conducted to validate the infiltration and distribution of cells in the tumor microenvironment.

RESULTS

We discovered that malignant cells in ICC samples exhibited a remarkably high degree of tumor heterogeneity. We identified a basal-like tumor cell subpopulation characterized by the expression of basal epithelial related genes including KRT5, KRT6A, and KRT17. The basal-like tumor subpopulation was characterized by activation of MET signaling and extracellular matrix organization associated with tumor invasion and correlated with poor prognosis. Cell-cell communication analysis further showed significant HGF-MET interaction between inflammatory cancer-associated fibroblasts (iCAFs) and basal-like tumor cells. We found that iCAFs were the major source of HGF in tumor environment and contributed to the basal-like phenotype formation of tumor cells by HGF-MET axis.

CONCLUSIONS

We identified an aggressive basal-like tumor cell subpopulation, which correlated with poor prognosis in ICC. The MET pathway contributes to the aggressiveness of basal-like tumor cells and serves as a novel therapeutic target for ICC.

Adjuvant Transarterial Chemoembolization in Resected Macrotrabecular-massive Hepatocellular Carcinoma (ATAC-MACRO): A Multicenter Real-world Retrospective Study

RATIONALE AND OBJECTIVES

The purpose of this study was to demonstrate the impact of postoperative adjuvant transarterial chemoembolization (TACE) on the prognosis of patients with macrotrabecular-massive hepatocellular carcinoma (MTM-HCC).

MATERIALS AND METHODS

This retrospective study used the clinical records of patients with resected MTM-HCC with/without adjuvant TACE at three centers between January 2015 and December 2022. The primary end point was recurrence free survival (RFS). The secondary end points were overall survival (OS) and safety.

RESULTS

A total of 559 eligible patients were classified into the adjuvant TACE group and the observation group. After propensity score matching analysis, both RFS (HR 0.62 [95% CI, 0.48 to 0.80]; P < 0.001) and OS (HR 0.59 [95% CI, 0.42 to 0.84]; P = 0.013) in the adjuvant TACE group were significantly better than the observation group. By Cox regression models, mALBI grade, types of hepatectomy, number, satellite lesion, without adjuvant TACE were identified as independent risk factors for RFS, and mALBI grade, number, maximum tumor size, satellite lesion, microvascular invasion, high AFP level, without adjuvant TACE were identified as independent risk factors for OS. The incidence of surgery-related adverse events (AEs) had no significant difference between the two groups (P = 0.609). The majority of AEs associated with adjuvant TACE were grade I (84.4%), and no treatment-related deaths occurred in either group.

CONCLUSIONS

Adjuvant TACE significantly improved the RFS and OS of patients with resected MTM-HCC with acceptable toxicity.

Diagnostic Yield of a Novel 11-Fr Digital Cholangioscope for Indeterminate Biliary Disease Using Macroscopic-On-Site Evaluation: Prospective Comparative Study

BACKGROUND AND AIM

A novel 11-Fr digital cholangioscope (eyeMAX) has recently become available. However, a prospective comparative study of the diagnostic yield of the eyeMAX and of a conventional cholangioscope (SpyGlass DS II) has not been reported. Therefore, the aim of this study was to prospectively compare the diagnostic yield of the eyeMAX and of the SpyGlass DS II for indeterminate biliary disease.

PATIENTS AND METHOD

Forceps biopsy was repeated until visible core tissue was obtained. The primary outcome of this study was the diagnostic accuracy of the biopsy specimens obtained by the eyeMAX. The secondary outcomes were comparisons of the diagnostic yield of visual findings, tissue size, number of forceps biopsies until MOSE positivity, and adverse events.

RESULTS

Fifty patients were prospectively enrolled in the eyeMAX group. And 47 patients in the SpyGlass DS II group were enrolled as a historical control. The number of biopsies was significantly fewer in the eyeMAX group than in the SpyGlass DS II group (p = 0.001). Tissue size was larger in the eyeMAX group (2.96 ± 0.69 mm2) than in the SpyGlass DS II group (1.80 ± 1.61 mm2). The diagnostic accuracy was also higher in the eyeMAX group (96.0%, 48/50) than in the SpyGlass DS II group (80.9%, 38/47). The diagnostic accuracy for the final diagnosis was slightly higher in the eyeMAX group (93.5%, 47/50) than in the SpyGlass DS II group (89.3%, 42/47).

CONCLUSIONS

The eyeMAX has a favorable diagnostic yield in terms of visual findings and the forceps biopsy specimen.

TRIAL REGISTRATION

000049465.

Resistance to PD-1/PD-L1 immune checkpoint blockade in advanced non-small cell lung cancer

Lung cancer is one of the most common malignant tumors, of which non-small cell lung cancer (NSCLC) accounts for about 85 %. Although immune checkpoint inhibitors (ICIs), particularly PD-1/PD-L1 inhibitors, have significantly improved the prognosis of patients with NSCLC. There are still many patients do not benefit from ICIs. Primary resistance remains a major challenge in advanced NSCLC. The cancer-immunity cycle describes the process from antigen release to T cell recognition and killing of the tumor, which provides a framework for understanding anti-tumor immunity. The classical cycle consists of seven steps, and alterations at each stage can result in resistance. This review examines the current status of PD-1/PD-L1 blockade in the treatment of advanced NSCLC and explores potential mechanisms of resistance. We summarize the latest clinical trials of PD-1/PD-L1 inhibitors combined with other therapies and explore potential targets for overcoming primary resistance to PD-1/PD-L1 inhibitors.

Current insights into anaesthesia and critical care management of patients with hepatocellular carcinoma: Multifaceted implications for the anaesthesiologist and intensive care physician

BACKGROUND

The incidence of hepatocellular carcinoma (HCC) is on the rise worldwide, due to the increasing prevalence of liver diseases associated with metabolic dysfunction and better management of cirrhosis and its complications. The diversification of HCC treatments has recently increased, with the choice of strategy based on HCC characteristics, liver function and comorbidities. The combination of new therapies has transformed the prognosis, with up to 70% survival at 5 years.

OBJECTIVE

The aim of this review was to analyse the most recent data on preoperative evaluation, peri-operative anaesthetic management of liver resection, liver transplantation and other types of procedures, and to highlight the multidisciplinary aspect of such management.

MAIN FINDINGS AND DISCUSSION

The importance of preanaesthetic evaluation will depend largely on the procedure proposed, associated co-morbidities and the stage of liver disease. This assessment should verify stabilisation of all comorbidities, and evaluate the degree of portal hypertension, cirrhosis severity and sarcopenia. Liver resection and liver transplantation for HCC present specific surgical challenges, and minimally invasive techniques improve recovery. Nonsurgical procedures considered as therapeutic (ablation) or standby (regional embolisation) are diverse, and all expose patients to specific intra-anaesthetic complications, sometimes requiring intensive care management. Peri-operative anaesthetic strategies deployed in the management of liver resection or nonsurgical procedures involve specific management of fluids, coagulation, narcosis and analgesia, which can impact on patients' overall, and cancer prognosis. Lastly, new down-staging strategies combining several types of procedure and possibly immunotherapy, also call for collegial reflection on posthepatic transplant immunosuppression, which must remain tailored to each individual patient.

A Randomized Study of Consolidation Chemoradiotherapy Versus Observation After First-line Chemotherapy in Advanced Gallbladder Cancers: RACE-GB study

PURPOSE

Chemotherapy (CT) is the standard of care for patients presenting with unresectable advanced gallbladder carcinoma (GBC) but their prognosis remains poor. The value of consolidation CT and radiation therapy (RT) after initial CT is uncertain. We, therefore, conducted a single-center open-label randomized trial evaluating consolidation CTRT versus observation after 4 cycles of CT in patients whose disease did not progress during CT (partial responders/stable disease).

METHODS AND MATERIALS

Responders to 4 cycles of CT were randomized (1:1) to CTRT versus observation (n = 135). CTRT was delivered using 3-dimensional-conformal RT (Field in the field when required) along with concurrent capecitabine. The dose of RT was 45 Gy in 25 fractions to GBC and lymphatics followed by a boost of 9 Gy in 5 fractions to the GBC. The primary endpoint was overall survival (OS) which was calculated from the date of randomization.

RESULTS

A total of 67 patients were randomized to observation and 68 to CTRT. Consolidation CTRT led to an improvement in median OS from 4 to 10 months (hazard ratio, 0.43; 95% CI, 0.32-0.62; P < .001). The actual median OS from accrual was 7 months (95% CI, 6.114-7.88 months) versus 13 months (95% CI, 11.13 -14.84 months). Adverse events (grade 3 or higher) because of CTRT were nausea (3%), anemia (9%), gastrointestinal bleeding (5.8%), and hepatotoxicity (13%). Functional Assessment of Cancer Therapy-General score and the Functional Assessment of Cancer Therapy-Hepatobiliary score did not deteriorate because of CTRT compared with observation (P values, .053 and .097).

CONCLUSIONS

To our knowledge, this is the first-ever randomized study in a low-middle-income country setting to demonstrate that consolidation CTRT significantly prolonged OS without deterioration in quality of life and should be the alternative standard of care in advanced unresectable GBC.

Pharmacologic features, clinical applications, and drug safety evaluation of futibatinib in the treatment of biliary tract cancer (BTC)

INTRODUCTION

Futibatinib is a small, potent, covalent, irreversible fibroblast growth factor receptor (FGFR) 1-4 inhibitor that has been added as a new standard of care for previously treated unresectable and/or advanced FGFR2 fusion/rearrangement-positive BTC. FGFR2 fusions/rearrangements play a key role in BTC survival, proliferation, invasion, and development of distant metastasis. The inhibition of this pathway is an important target in the treatment of BTC.

AREAS COVERED

The article covers the development of futibatinib for the treatment of refractory unresectable/advanced BTC, its mechanism of action, and key pharmacodynamic/pharmacokinetic data with a focus on the safety profile. Data are based on published clinical trials, pooled analysis, and retrospective studies indexed in PubMed (2010-2024).

EXPERT OPINION

Futibatinib is an FDA and EMA approved FGFR2 inhibitor for the treatment of patients with refractory BTC with FGFR2 fusions/rearrangements. Ongoing drug development strategies are centered on designing new FGFR2 fusion inhibitors able to overcome on-target and off-target resistances coupled with a high target selectivity to spare the most common treatment-related adverse events (hyperphosphatemia, stomatitis, alopecia, nail toxicity, skin reactions, eye toxicity).

Oncolytic virus VG161 in refractory hepatocellular carcinoma

Hepatocellular carcinoma remains a life-threatening malignancy with limited therapeutic options following the failure of second-line treatments1,2. Oncolytic viruses selectively replicate in and lyse cancer cells, releasing neoantigens and stimulating systemic antitumour immunity3, offering a potential therapeutic option. Here we present the results of a multicentre phase 1 clinical trial evaluating VG161, an engineered oncolytic herpes simplex virus that expresses IL-12, IL-15, IL-15Rα and a PD-1-PD-L1-blocking fusion protein4, for safety and efficacy in patients with advanced liver cancer. VG161 was well tolerated, with no dose-limiting toxicities observed, and it demonstrated promising efficacy by reshaping the tumour immune microenvironment and re-sensitizing tumours that were previously resistant to systemic treatments. Notably, we also found that patients who had previously been sensitive to checkpoint inhibitor therapy showed enhanced efficacy with VG161 treatment. Furthermore, we developed an efficacy-prediction model based on differentially expressed genes, which successfully identified patients who were likely to benefit from VG161 and predicted prolonged overall survival. These findings position VG161 as a promising third-line therapeutic option for refractory hepatocellular carcinoma. This provides a new avenue for treatment and advances the field of oncolytic virus-based immunotherapies. ClinicalTrials.gov registration: NCT04806464 .

EASL Clinical Practice Guidelines on the management of extrahepatic cholangiocarcinoma

Recent years have witnessed significant advances in the imaging, molecular profiling, and systemic treatment of cholangiocarcinoma (CCA). Despite this progress, the early detection, precise classification, and effective management of CCA remain challenging. Owing to recent developments and the significant differences in CCA subtypes, EASL commissioned a panel of experts to draft evidence-based recommendations on the management of extrahepatic CCA, comprising distal and perihilar CCA. Particular attention is given to the need for accurate classification systems, the integration of emerging molecular insights, and practical strategies for diagnosis and treatment that reflect real-world clinical scenarios.

Role of Immunotherapy in the Treatment of Hepatocellular Carcinoma

Hepatocellular carcinoma is the most common primary liver tumor and is strongly related to underlying liver cirrhosis. Common etiologies include viral hepatitis, elevated alcohol consumption and metabolic diseases, all of which result in liver inflammation and scarring. Previously, systemic therapies for locally advanced or metastatic disease were limited to tyrosine kinase inhibitors with poor efficacy and rare cures. Recent advances have harnessed the power of the immune system to combat disease, resulting in improved outcomes and occasional cures. Here, we describe the recent clinical trials in immunotherapies for the treatment of hepatocellular carcinoma as first- and second-line therapies and in combination with other drug classes.

Precision oncology in biliary tract cancer: the emerging role of liquid biopsy

Liquid biopsy has already proven effective in aiding diagnosis, risk stratification and treatment personalization in several malignancies, and it could represent a practice-changing tool also in biliary tract cancer, even though clinical applications are currently still limited. It is promising for early diagnosis, especially in high-risk populations, and several studies on circulating free DNA (cfDNA), circulating tumour cells and differential microRNA (miRNA) profiles in this setting are ongoing. Circulating tumour DNA (ctDNA) also appears as a feasible noninvasive biomarker in the curative setting, in detecting minimal residual disease after resection and in monitoring disease recurrence. As of today, it can be particularly valuable in biliary tract cancer for genomic profiling, with a good concordance with tissue samples for most molecular alterations. CtDNA analysis may especially be considered in clinical practice when the tumour tissue is not sufficient for next-generation sequencing, or when urgent therapeutic decisions are needed. Moreover, it offers the possibility of providing a real-time picture to monitor treatment response and dynamically identify resistance mutations, potentially representing a way to optimize treatment strategies.

LI-RADS CT/MRI Radiation Treatment Response Algorithm Version 2024: Category Redistribution and Short-Term Outcomes in Patients Undergoing Y-90 Radioembolization for HCC

Background: LI-RADS CT/MRI Radiation Treatment Response Algorithm (TRA) version 2024 (v2024) addresses a pitfall of the earlier algorithm relating to expected persistent enhancement of hepatocellular carcinoma (HCC) responding to radiation. v2024 removes LR-TR Equivocal, introduces LR-TR Nonprogressing (stable or decreasing masslike enhancement), and more narrowly defines LR-TR Viable (new or increasing masslike enhancement). Objective: To evaluate in patients with HCC treated by Y-90 radioembolization the redistribution of categories in LI-RADS CT/MRI Radiation TRA v2024 versus LI-RADS CT/MRI TRA version 2018 (v2018) and to assess short-term outcomes of v2024 categories. Methods: This retrospective study included 242 patients (57 women, 185 men; median age, 65 years) with 319 HCCs treated by Y-90 radioembolization from February 2011 to March 2022 and evaluated by initial 3-month posttreatment CT or MRI. Two radiologists assigned v2018 and v2024 categories; a third radiologist resolved discrepancies. The radiologists also assessed available second posttreatment CT or MRI examinations using v2024. Overall survival (OS) was determined. Results: On initial follow-up, by v2018, 18 (5.6%) lesions were LR-TR Nonviable, 21 (6.6%) LR-TR Equivocal, and 280 (87.8%) LR-TR Viable; by v2024, 18 (5.6%) were LR-TR Nonviable, 182 (57.1%) LR-TR Nonprogressing, and 119 (37.3%) LR-TR Viable. All LR-TR Equivocal and 161 (57.5%) LR-TR Viable lesions by v2018 were recategorized as LRTR Nonprogressing by v2024. Of 96 LR-TR Nonprogressing lesions with second follow-up, 63 (65.6%) remained LRTR Nonprogressing, 19 (19.8%) transitioned to LR-TR Nonviable, and 14 (14.6%) transitioned to LR-TR Viable. Of 29 LR-TR Viable lesions by v2024 with second follow-up, 23 (79.3%) remained LR-TR Viable, and 6 (20.7%) transitioned to LR-TR Nonprogressing. By Kaplan-Meier analysis using initial categories, OS showed no significant difference between LR-TR Equivocal and LR-TR Viable for v2018 (p=.05) but was significantly worse for LR-TR Viable than LRTR Nonprogressing for v2024 (p<.001). Conclusion: For v2024, LR-TR Viable was substantially less frequent versus v2018, and the majority of lesions were assigned LR-TR Nonprogressing. Using v2024, most LR-TR Viable lesions and the majority of LR-TR Nonprogressing lesion on initial follow-up remained as such on later imaging. Initial v2024 categories were associated with OS. Clinical Impact: The findings support the revisions in v2024.

Advances and Emerging Techniques in Y-90 Radioembolization for Hepatocellular Carcinoma

Hepatocellular carcinoma (HCC) is the fourth leading cause of cancer deaths worldwide. Despite the high incidence of HCC, mortality remains high, with an estimated 5-year survival rate of less than 20%. Surgical resection represents a potential curative treatment for HCC; however, less than 20% of patients with HCC are candidates for surgical resection. In patients with unresectable HCC, Yttrium-90 (Y90) transarterial radioembolization (TARE) has emerged as an innovative treatment option. This locoregional therapy delivers high doses of radiation directly to liver tumors via intra-arterial injection, allowing for the targeted destruction of malignant cells while sparing surrounding healthy tissue. In this review, we will explore the latest advances in Y90 TARE for the treatment of HCC, focusing on key developments such as the following: (1) improvements in radiation lobectomy and segmentectomy techniques, (2) the introduction of personalized dosimetry, (3) the integration of combination therapies, (4) the use of imageable microspheres, (5) pressure-enabled Y90 delivery systems, and (6) the application of Y90 surrogates.