A phase Ib/II study of fruquintinib in combination with paclitaxel as the second-line therapy for advanced gastric cancer

PD-1 inhibitor combined with albumin paclitaxel and apatinib as second-line treatment for patients with metastatic gastric cancer: a single-center, single-arm, phase II study

BACKGROUND

Immune checkpoint inhibitors have been approved for first- and third-line treatment of advanced gastric cancer. However, pembrolizumab alone in the second line did not improve overall survival compared to chemotherapy in the KEYNOTE-061 study. In this study, we aimed to explore the efficacy and safety of a three-drug regimen of PD-1 inhibitor combined with albumin paclitaxel and apatinib (a VEGFR inhibitor) for the second-line treatment of patients with metastatic gastric cancer (mGC).

METHODS

This was a single-center, single-arm, phase II clinical study. Patients with mGC with stable microsatellite and negative HER-2 expression who failed first-line chemotherapy were enrolled. The enrolled patients were treated with PD-1 inhibitor (selected according to patients' requirements) in combination with albumin paclitaxel (125 mg/m2, intravenously, days 1 and 8, or 250 mg/m2, intravenously, day 1) and apatinib (250 or 500 mg, orally, days 1-21) every 3 weeks. The primary endpoint was progression-free survival (PFS), and the secondary endpoints were overall survival (OS), objective response rate (ORR), disease control rate (DCR), duration of response, and adverse events (AEs).

RESULTS

From July 11, 2019, to October 13, 2022, a total of 43 patients were enrolled, of whom 10 were PD-L1 negative, 11 were PD-L1 positive, and 22 had unknown PD-L1 expression. As of the data cutoff on April 1st, 2023, nine patients had partial response, 29 had stable disease, and five experienced progressive disease, with the ORR of 20.9% and DCR of 88.3%. The median PFS was 6.2 months (95% CI, 3.9-9.3), and the median OS was 10.1 months (95% CI, 7.5-14.1). All patients suffered from alopecia and neurotoxicity. The other main AEs of grade 1 or 2 were bone marrow suppression (N = 21, 48.8%), hand-foot reaction (N = 19, 44.2%), hypertension (N = 18, 41.9%), hypothyroidism (N = 11, 25.6%), gastrointestinal bleeding (N = 3, 7.0%), and liver function damage (N = 5, 11.6%). Two patients reported grade 3-4 immune-related liver damage.

CONCLUSION

Second-line PD-1 inhibitor combined with albumin paclitaxel and apatinib showed certain efficacy and safety in patients with mGC.

TRIAL REGISTRATION

Clinical trials, NCT04182724. Registered 27 November 2019; retrospectively registered, https://clinicaltrials.gov/study/NCT04182724.

Fruquintinib plus oxaliplatin combined with S-1 (SOX) as neoadjuvant therapy for locally advanced gastric cancer (GC) or gastro-oesophageal junction adenocarcinoma (GEJ): a multicentre, phase II, single-arm, open-label clinical trial (FRUTINEOGA) protocol

INTRODUCTION

Curing locally advanced gastric cancer (GC) or gastro-oesophageal junction adenocarcinoma (GEJ) with surgery alone is challenging. Neoadjuvant chemotherapy (NCT) has become the standard treatment for patients with locally advanced GC/GEJ, and SOX is the most common neoadjuvant regimen in China. The generally good tolerability in patients and fruquintinib's low potential for drug-drug interaction suggest that it may be highly suitable for combinations with other antineoplastic therapies. A combination of fruquintinib, S-1 and oxaliplatin can be a promising neoadjuvant treatment for locally advanced GC/GEJ. In this phase II study, we aim to investigate the efficacy and toxicity of fruquintinib plus SOX as neoadjuvant treatment for locally advanced GC/GEJ.

METHODS AND ANALYSIS

The FRUTINEOGA trial is a prospective, multicentre, phase II, single-arm, open-label clinical trial that will enrol 54 patients. Eligible patients will be registered, enrolled and receive 2-4 cycles of fruquintinib plus SOX, after which surgery will be performed and tumour regression will be evaluated. The primary endpoint is the pathological remission rate, and the secondary endpoints are disease-free survival, overall survival, objective response rate, major pathological response rate and R0 resection rate.

ETHICS AND DISSEMINATION

Written informed consent will be required from all patients enrolled, and it will be provided by them. The study protocol received approval from the independent ethical review committee of Guangxi Medical University Cancer Hospital, Wuming Hospital of Guangxi Medical University and Wuzhou Red Cross Hospital, Wuzhou Gongren Hospital (approval number: CS2021(96)). We will submit the finalised paper for publication on completing the analyses. This study will provide valuable insights to clinicians regarding the safety and efficacy of incorporating fruquintinib into SOX as neoadjuvant treatment for locally advanced GC/GEJ. The findings have the potential to inform future research proposals and may guide the use of fruquintinib in the neoadjuvant setting for locally advanced GC/GEJ.

TRIAL REGISTRATION NUMBER

NCT05122091.

Gastric cancer treatment: recent progress and future perspectives

Gastric cancer (GC) is one of the most common malignancies worldwide. Most patients are diagnosed at advanced stages due to the subtle symptoms of earlier disease and the low rate of regular screening. Systemic therapies for GC, including chemotherapy, targeted therapy and immunotherapy, have evolved significantly in the past few years. For resectable GC, perioperative chemotherapy has become the standard treatment. Ongoing investigations are exploring the potential benefits of targeted therapy or immunotherapy in the perioperative or adjuvant setting. For metastatic disease, there have been notable advancements in immunotherapy and biomarker-directed therapies recently. Classification based on molecular biomarkers, such as programmed cell death ligand 1 (PD-L1), microsatellite instability (MSI), and human epidermal growth factor receptor 2 (HER2), provides an opportunity to differentiate patients who may benefit from immunotherapy or targeted therapy. Molecular diagnostic techniques have facilitated the characterization of GC genetic profiles and the identification of new potential molecular targets. This review systematically summarizes the main research progress in systemic treatment for GC, discusses current individualized strategies and presents future perspectives.

Recent Trends and Advancements in the Diagnosis and Management of Gastric Cancer

Gastric cancer is an enigmatic malignancy that has recently been shown to be increasing in incidence globally. There has been recent progress in emerging technologies for the diagnosis and treatment of the disease. Improvements in non-invasive diagnostic techniques with serological tests and biomarkers have led to decreased use of invasive procedures such as endoscopy. A multidisciplinary approach is used to treat gastric cancer, with recent significant advancements in systemic therapies used in combination with cytotoxic chemotherapies. New therapeutic targets have been identified and clinical trials are taking place to assess their efficacy and safety. In this review, we provide an overview of the current and emerging treatment strategies and diagnostic techniques for gastric cancer.