Critical issues in the design and implementation of clinical trials in hepatocellular carcinoma

Multidisciplinary strategies to improve treatment outcomes in hepatocellular carcinoma: a European perspective

Hepatocellular carcinoma (HCC) is a complex disease with a poor prognosis. Incidence and mortality rates are increasing in many geographical regions, indicating a need for better management strategies. Among several risk factors for HCC, the most common are cirrhosis because of chronic hepatitis B virus or hepatitis C virus infection and alcohol consumption, obesity, and diabetes. In some patients, combined risk factors present additional challenges to the prevention and treatment of HCC. Screening and surveillance of high-risk populations varies widely by geographic regions, and access to optimal surveillance is critical for early diagnosis. The treatment choice for HCC depends on the cancer stage, patient performance status, and liver function and requires a multidisciplinary approach and close cooperation among specialists for the best patient outcomes. Despite advances in surgical treatments and locoregional therapies, recurrence and liver failure remain significant challenges. The pathogenesis of HCC is a multistep and complex process, wherein angiogenesis plays an important role. The multikinase inhibitor sorafenib is the only approved targeted agent for advanced HCC, although promising results have been obtained with other targeted agents and combinations, and the results of ongoing trials are eagerly awaited. Clinical trials with rigorous study designs, including molecular classification and validation of new molecular biomarkers, are required to improve the personalized treatment of HCC. This article provides an overview of HCC and was developed through a review of relevant literature, clinical trial data, and updated clinical guidelines.

Early α-fetoprotein response as a predictor for clinical outcome after localized concurrent chemoradiotherapy for advanced hepatocellular carcinoma

BACKGROUNDS

There are limitations in using only radiological criteria to evaluate treatment outcomes in hepatocellular carcinoma (HCC). α-fetoprotein (AFP) is regarded as an indicator of tumour activity in HCC.

AIMS

We present a novel correlation between AFP response and survival outcome in patients treated with localized concurrent chemoradiotherapy (CCRT).

MATERIALS

From 2005 to 2008, 187 locally advanced HCC patients underwent localized CCRT (external beam radiotherapy at 45 Gy over 5 weeks plus a concurrent hepatic arterial infusion of 5-fluorouracil during the first/fifth week), followed by repetitive hepatic arterial infusional chemotherapy (HAIC) with 5-fluorouracil and cisplatin. Among them, 149 with an elevated baseline AFP level (>20 ng/ml) were finally studied. AFP response was defined as >50% decrease from baseline, 1 month after the completion of localized CCRT.

RESULTS

Patients' characteristics were as follows: median age (52 years); Child-Pugh class A/B (n=137/12 respectively); and portal vein thrombosis (n=118). AFP responders (101 patients) had better objective responses than AFP non-responders (48 patients) after CCRT (44.5 vs. 12.5%; P<0.001) and subsequent HAIC (51.5 vs. 16.7%; P<0.001). Both median progression-free survival (PFS, 8.1 vs. 3.9 months; P<0.001) and overall survival (OS, 13.3 vs. 5.9 months; P<0.001) were longer in AFP responders than AFP non-responders. In multivariate analysis, AFP response and objective response were independent factors affecting PFS and OS. Furthermore, AFP non-responders were more likely to have extrahepatic metastasis within 6 months of treatments initiation than AFP responders (59.5 vs. 25.9%; P<0.001).

CONCLUSIONS

Early AFP response may be useful not only in predicting prognosis and treatment response but also in establishing optimized treatment plans for HCC.

Role of alpha-fetoprotein in hepatocellular carcinoma: prognostication, treatment monitoring or both?

Despite recent breakthroughs in the treatment for both early and advanced hepatocellular carcinoma, the development of markers for prognostication and treatment monitoring remains to be explored. Serum alpha-fetoprotein has been frequently measured at diagnosis and serially during treatment by clinicians for decades, with an aim for prognostication of disease and monitoring of treatment response. In this review, the evidence regarding the prognostic value of serum alpha-fetoprotein and the value of serial alpha-fetoprotein in the monitoring of treatment efficacy will be discussed, with emphasis on recent data.

New utility of an old marker: serial alpha-fetoprotein measurement in predicting radiologic response and survival of patients with hepatocellular carcinoma undergoing systemic chemotherapy

PURPOSE

There are limitations in using radiologic evaluation to assess the treatment outcome of patients with hepatocellular carcinoma (HCC). The use of serial alpha-fetoprotein (AFP) in monitoring response has not been rigorously evaluated. We aimed to study the clinical value of AFP trend in an attempt to validate AFP as a surrogate serologic end point.

PATIENTS AND METHODS

Participants from a phase III randomized trial of systemic chemotherapy in HCC were studied. Serum AFP was prospectively collected in parallel with clinical and radiologic outcome. AFP response was defined as a decrease in AFP of more than 20% after a minimum of two cycles of chemotherapy. We studied the relationship between AFP response and treatment outcome in terms of radiologic response and overall survival.

RESULTS

Of 188 patients, 117 patients with elevated serum AFP (> 20 microg/L) and documented radiologic evaluation had received at least two cycles of chemotherapy. A total of 47 AFP responders were identified. AFP responders had better survival than nonresponders (13.5 v 5.6 months, respectively; P < .0001), and AFP response was strongly associated with radiologic response (P < .0001). Multivariate analysis suggested that AFP response was significantly associated with survival (hazard ratio, 0.413; 95% CI, 0.273 to 0.626; P < .0001). AFP responses were frequently observed in patients with radiologically stable disease (SD) and tended to identify a subgroup of SD patients with better survival.

CONCLUSION

Serial AFP measurement is useful in prognostication and monitoring treatment response in HCC patients undergoing systemic chemotherapy. Incorporation of AFP response into the criteria evaluating treatment outcome should be considered in clinical practice and clinical trials of novel agents in HCC.