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. 2021 Apr 14;22(3):615–636. doi: 10.1007/s11154-021-09647-z

Table 1.

Ongoing RCT for ICIs in GEP-NENs

ClinicalTrials.gov Identifier Molecule Study phase Assigned intervention Primary outcome(s) Estimated enrollment, n Estimated study completion date Trial status

NCT03043664*

Phase Ib/II Study of Pembrolizumab With Lanreotide Depot for Gastroenteropancreatic Neuroendocrine Tumors

Pembrolizumab Phase Ib—II Pembrolizumab 200 mg intravenous every 3 weeks and lanreotide depot 90 mg subcutaneous every 3 weeks Objective response rate 22 June 1, 2021 Active, not recruiting

NCT03901378

A Phase II Trial of Pembrolizumab in Combination With Cisplatin or Carboplatin and Etoposide in Chemotherapy naïve Patients With Metastatic or Unresectable High Grade Gastroenteropancreatic or Lung (Excluding Small Cell) Neuroendocrine Carcinoma

Pembrolizumab Phase II Pembrolizumab 200 mg with Carboplatin or Cisplatin plus etoposide. Repeat 4–6 cycles followed by Pembrolizumab alone until progression or intolerance for up to 2 years Progression-free survival - - Withdrawn (Lack of accrual)

NCT03136055**

A Pilot Study of Pembrolizumab-based Therapy in Previously Treated High Grade Neuroendocrine Carcinomas

Pembrolizumab Phase II

Part A: pembrolizumab 200 mg every three weeks

Part B: pembrolizumab 200 mg every three weeks and, either

- irinotecan 125 mg/m2 in a two weeks on, one week off format in 3 week cycles, or

- paclitaxel 80 mg/m2 every week

Overall response rate 36 July 1, 2023 Active, not recruiting

NCT03278405

A Pilot Study of Avelumab in Unresectable/Metastatic, Progressive, Poorly Differentiated Grade 3 Neuroendocrine Carcinomas

Avelumab Phase I—II Avelumab 10 mg/kg once every 2 weeks, until occurence of progressive disease, unacceptable toxicity, or any of the other criteria for withdrawal listed in the protocol Overall response rate 10 March 12, 2020 Completed

NCT03147404

Phase II Study of Avelumab in Metastatic Gastronetro-pancreatic (GEP) Neuroendocrine Carcinoma (NEC, WHO Grade 3)as Second-line Treatment After Failing to Etoposide + Cisplatin: Integration of Genomic Analysis to Identify Predictive Molecular Subtypes (MS100070-0177)

Avelumab Phase II Avelumab 10 mg/kg every 2 weeks Best response 14 July 22, 2019 Completed

NCT03591731

A GCO Trial Exploring the Efficacy and Safety of Nivolumab Monotherapy or Nivolumab Plus Ipilimumab in Pre-treated Patients With Advanced, Refractory Pulmonary or Gastroenteropancreatic Poorly Differentiated Neuroendocrine

Nivolumab /

Nivolumab + Ipilimumab

Phase II

[arm A]: Nivolumab 3 mg/kg every 2 weeks

[arm B]: Nivolumab 3 mg/kg every 2 weeks + Ipilimumab 1 mg/kg every 6 weeks

Objective response rate 180 September 2023 Recruiting

NCT04525638

A Phase II Single Arm Trial Evaluating the Preliminary Efficacy of the Combination of 177Lu-DOTATATE and Nivolumab in Grade 3 Well-differentiated Neuroendocrine Tumours (NET) or Poorly Differentiated Neuroendocrine Carcinomas (NEC)

Nivolumab Phase II Nivolumab 240 mg and 7.4 GBq 177Lu-DOTATATE intravenously as a 4-h infusion Overall response rate 30 September 30, 2024 Recruiting

NCT03352934***

A Phase II, Open-label, Multicenter Trial to Investigate the Clinical Activity and Safety of Avelumab in Patients With Advanced, Metastatic High Grade Neuroendocrine Carcinomas NEC G3 (WHO 2010) Progressive After Chemotherapy

Avelumab Phase II 10 mg/kg Avelumab every 2 weeks until documented disease progression (PD), unacceptable toxicity, or any criterion for treatment withdrawal are met Disease control rate 60 January 2024 Active, not recruiting

NCT04079712

A Phase 2 Study of XL184 (Cabozantinib) in Combination With Nivolumab and Ipilimumab for the Treatment of Poorly Differentiated Neuroendocrine Carcinomas

Nivolumab + ipilimumab Phase II

Cabozantinib on days 1–21 of cycles 1–4 and days 1–28 of subsequent cycles;

Nivolumab on day 1, and ipilimumab on day 1 of cycles 1–4 only

Treatment repeats every 21 for 4 cycles then every 28 days for subsequent cycles in the absence of disease progression or unacceptable toxicity

Overall response rate 30 October 1, 2021 Recruiting

NCT03190213

Pembrolizumab for the Treatment of Recurrent High Grade Neuroendocrine Carcinoma

Pembrolizumab Phase II Pembrolizumab 200 mg every 3 weeks until disease recurrence or discontinuation due to unacceptable toxicity for a maximum of 2 years Overall response rate 6 March 11, 2019 Terminated (discontinued)

NCT03980925

A Phase II Study of Platinum-doublet Chemotherapy in Combination With Nivolumab as First-line Treatment in Subjects With Unresectable, Locally Advanced or Metastatic G3 Neuroendocrine Neoplasms (NENs) of the Gastroenteropancreatic (GEP) Tract or of Unknown (UK) Origin

Nivolumab Phase II

[Induction Phase]: Nivolumab 360 mg + Carboplatin + Etoposide on days 1-3D, all every 3 weeks up to 6 cycles followed by Nivolumab 480 mg for 24 months or until PD, death or toxicity

[Maintenance Phase]: Nivolumab 480 mg every 4 weeks for 2 years

Overall survival rate 38 December 2022 Recruiting

NCT03290079

Phase II Study of Pembrolizumab and Lenvatinib in Advanced Well-differentiated Neuroendocrine Tumors

Pembrolizumab Phase II Pembrolizumab 200 mg every 3 weeks Objective response rate 30 December 2023 Suspended

NCT03728361****

A Phase II, Multi-Cohort Trial of Combination Nivolumab and Temozolomide in Recurrent/Refractory Small-Cell Lung Cancer and Advanced Neuroendocrine Tumors

Nivolumab Phase II Nivolumab on day 1 of a 28 day cycle + temozolomide on days 1–5. Courses repeat every 28 days in the absence of disease progression or unacceptable toxicity Objective response rate 53 December 31, 2021 Recruiting

NCT03074513*****

A Phase II, Single-Arm Open-Label Study of the Combination of Atezolizumab and Bevacizumab in Rare Solid Tumors

Atezolizumab Phase II Atezolizumab + Bevacizumab on day 1. Courses repeat every 21 days in the absence of disease progression or unacceptable toxicity Objective response 164 March 31, 2021 Active, not recruiting

NCT03475953

A Phase I/II Study of Regorafenib Plus Avelumab in Solid Tumors

Avelumab Phase I—II Phase 1 and Phase 2: Avelumab every 2 weeks starting at Cycle 1 Day 15. Regorafenib (oral) once daily for three weeks on/one week off

Phase I: Recommended dose of regorafenib

Phase II: objective response; progression-free rate

482 (though only one cohort out of ten is made by GEP-NETs) May 2022 Recruiting

NCT03095274******

A Phase II Study of Durvalumab (MEDI4736) Plus Tremelimumab for the Treatment of Patients With Advanced Neuroendocrine Neoplasms of Gastroenteropancreatic or Lung Origin (the DUNE Trial)

Durvalumab + Tremelimumab Phase II

Durvalumab 1500 mg for 12 months in patients ≥ 30 kg. durvalumab 20 mg/kg for patients < 30 kg

Tremelimumab 75 mg for up to 4 doses/cycles in patients ≥ 30 kg. remelimumab 1 mg/kg for patients < 30 kg

Clinical Benefit Rate 126 July 2021 Recruiting

NCT04579757

An Open-Label Phase Ib/II Study of Surufatinib in Combination With Tislelizumab in Subjects With Advanced Solid Tumors

Tislelizumab Phase Ib—II

Part 1 (dose escalation): surufatinib administered orally once daily + tislelizumab 200 mg intravenous infusion every 3 weeks

Part 2 surufatinib at the Recommended Phase 2 Dose selected in Part 1 + tislelizumab 200 mg every 3 weeks

Dose limiting toxicity;

Objective response rate

120 April 30, 2023 Recruiting

NCT03365791*******

Modular Phase 2 Study to Link Combination Immune-therapy to Patients With Advanced Solid and Hematologic Malignancies. Module 9: PDR001 Plus LAG525 for Patients With Advanced Solid and Hematologic Malignancies

Spartalizumab Phase II PDR001 (spartalizumab) and LAG525 will be administered via i.v. infusion over 30 min once every 3 weeks. LAG525 will be given first followed by PDR001 Clinical Benefit Rate 76 September 17, 2020 Completed

*Initial results posted [48]

**Initial results posted [53]

***Initial results posted [49]

****Initial results posted [50]

*****Initial results posted [52]

******Initial results posted [54]

*******Initial results posted [51]