Study to Evaluate the Efficacy and Safety of [177Lu]Lu-DOTA-TATE in Patients With Grade 1 and Grade 2 Advanced GEP-NET
NETTER-3
A Phase III Multi-center, Randomized, Open-label Study to Evaluate the Efficacy and Safety of [177Lu]Lu-DOTA-TATE in Patients Newly Diagnosed With Grade 1 and Grade 2 (Ki-67 <10%) Advanced GEP-NET With High Disease Burden (NETTER-3)
2 other identifiers
interventional
240
12 countries
65
Brief Summary
The purpose of the current study is to evaluate the efficacy and safety of \[177Lu\]Lu-DOTA-TATE plus octreotide long-acting release (LAR) versus octreotide LAR alone in newly diagnosed patients with somatostatin receptor positive (SSTR+), well differentiated Grade1 and Grade 2 (G1 and G2) (Ki-67 \<10%) advanced gastroenteropancreatic neuroendocrine tumors (GEP-NETs) with high disease burden
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P50-P75 for phase_3
Started May 2025
Longer than P75 for phase_3
65 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
December 19, 2024
CompletedFirst Posted
Study publicly available on registry
January 20, 2025
CompletedStudy Start
First participant enrolled
May 30, 2025
CompletedPrimary Completion
Last participant's last visit for primary outcome
December 8, 2028
ExpectedStudy Completion
Last participant's last visit for all outcomes
January 23, 2034
April 30, 2026
April 1, 2026
3.5 years
December 19, 2024
April 28, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Progression Free Survival (PFS) centrally assessed by Blinded Independent Review Committee (BIRC)
PFS is defined as the time from randomization to the first occurrence of progression (centrally assessed by Blinded Independent Review Committee (BIRC) according to RECIST v1.1) or death due to any cause.
After observing approximately 88 PFS events as per BIRC assessments, expected after approximately 33 months from study start
Secondary Outcomes (15)
Time to Deterioration (TDD) (Key Secondary)
After observing approximately 88 PFS events as per BIRC assessment, expected after approximately 33 months from study start
Progression Free Survival (PFS)
After observing approximately 88 PFS events as per BIRC assessment, expected after approximately 33 months from study start
Objective Response Rate (ORR)
After observing approximately 88 PFS events as per BIRC assessment, expected after approximately 33 months from study start
Disease Control Rate (DCR)
After observing approximately 88 PFS events as per BIRC assessment, expected after approximately 33 months from study start
Duration of Response (DOR)
After observing approximately 88 PFS events as per BIRC assessment, expected after approximately 33 months from study start
- +10 more secondary outcomes
Study Arms (2)
[177Lu]Lu-DOTA-TATE + Octreotide LAR
EXPERIMENTALParticipants in this arm will receive \[177Lu\]Lu-DOTA-TATE plus Octreotide long-acting release (LAR).
Octreotide LAR
ACTIVE COMPARATORParticipants in this arm will receive Octreotide LAR only.
Interventions
\[177Lu\]Lu-DOTA-TATE will be administered 4 times during treatment period with frequency of every 8 weeks (Q8W)
Octreotide LAR will be administered Q8W when co-administered with \[177Lu\]Lu-DOTA-TATE in the investigational arm followed by Q4W. In the control arm Octreotide LAR will be administered Q4W.
Eligibility Criteria
You may qualify if:
- Presence of metastasized or locally advanced, unresectable (curative intent), histologically proven, well differentiated Grade 1 or Grade 2 (Ki-67 \<10%) gastroenteropancreatic neuroendocrine tumor (GEP-NET) diagnosed within 6 months prior to screening.
- Participants with high disease burden in the Investigator's opinion. Following criteria should be used as the guiding principle for determining high disease burden:
- Primary tumor or a metastatic lesion \> 4 cm
- More than one tumor or metastatic lesions measuring \> 2 cm
- Elevated alkaline phosphatase \> 2.5 X upper limit of normal (ULN)
- Presence of bone metastasis
- Presence of peritoneal metastasis
- Symptoms due to tumor volume such as pain, fatigue, weight loss, anorexia etc.
- Symptoms due to hormone excess requiring active management
- Additionally, participants who, in the Investigator's opinion, have high disease burden due to their disease characteristics not specified above could also be considered eligible.
- Participants ≥ 12 years of age.
- RLI somatostatin receptor (SSTR) uptake on all target lesions (defined by RECIST v1.1 criteria) at least as high as normal liver uptake assessed within 3 months prior to randomization. Any of the RLI modalities as available (some examples are listed below) can be used as per local practice:
- \[68Ga\]Ga-DOTA-TOC PET/CT or PET/MRI
- \[68Ga\]Ga-DOTA-TATE PET/CT or PET/MRI
- \[64Cu\]Cu-DOTA-TATE PET/CT or PET/MRI
- +11 more criteria
You may not qualify if:
- Prior administration of a therapeutic radiopharmaceutical for GEP-NET at any time prior to randomization in the study.
- Any previous therapy with interferons, mTOR-inhibitors, chemotherapy or other systemic therapies except somatostatin analogues (SSAs) of GEP-NET. If as per Investigator's opinion a participant is candidate for such therapies, such participant must not be enrolled.
- Participant who received more than 4 cycles of prior SSAs (e.g., octreotide long-acting release) are not eligible. In addition, any participant receiving treatment with short-acting octreotide, which cannot be interrupted for 24 h before the administration of \[177Lu\]Lu-DOTA-TATE, or any participant receiving treatment with SSAs, which cannot be interrupted for at least 4 weeks before the administration of \[177Lu\]Lu-DOTA-TATE.
- Documented RECIST v1.1 progression during previous SSA treatments for the current GEP-NET at any time prior to randomization.
- Any previous radioembolization, chemoembolization and radiofrequency ablation for GEP-NET.
- Any major surgery within 12 weeks prior to randomization in the study.
- Known brain metastases.
- Participant with known intolerance to CT scans with intravenous (i.v.) contrast due to allergic reaction or renal insufficiency. If such a participant can be imaged with MRI, then the participant would not be excluded.
- Hypersensitivity to any somatostatin analogues, to the Investigational Medicinal Products (IMPs) active substance or to any of the excipients.
- Active severe urinary incontinence, severe voiding dysfunction, or urinary obstruction requiring an indwelling/condom catheter that, in the judgment of the Investigator, could prevent adhering to radiation safety instructions.
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (65)
Mayo Clinic Arizona
Scottsdale, Arizona, 85259, United States
Highlands Oncology Group
Fayetteville, Arkansas, 72703, United States
Rocky Mountain Cancer Centers
Denver, Colorado, 80218, United States
Hartford Hospital
Hartford, Connecticut, 06102, United States
Yale New Haven Hospital
New Haven, Connecticut, 06520, United States
Mayo Clinic Jacksonville
Jacksonville, Florida, 32224, United States
Winship Cancer Institute
Atlanta, Georgia, 30322, United States
St Elizabeth Healthcare
Edgewood, Kentucky, 41017, United States
LSU Medical Center
New Orleans, Louisiana, 70112, United States
Henry Ford Hospital
Detroit, Michigan, 48202-2689, United States
Mount Sinai Medical Center
New York, New York, 10029-6574, United States
Piedmont Healthcare
Winston-Salem, North Carolina, 27103, United States
Tennessee Oncology
Nashville, Tennessee, 37203, United States
TxO Austin Midtown
Austin, Texas, 78705, United States
Texas Oncology
Dallas, Texas, 75251, United States
Virginia Cancer Specialists
Fairfax, Virginia, 22031, United States
Virginia Oncology Associates
Norfolk, Virginia, 23502, United States
Blue Ridge Cancer Center
Wytheville, Virginia, 24382, United States
Northwest Medical Specialties
Tacoma, Washington, 98405, United States
Novartis Investigative Site
Edmonton, Alberta, T6G 1Z2, Canada
Novartis Investigative Site
London, Ontario, N6A 5W9, Canada
Novartis Investigative Site
Toronto, Ontario, M4N 3M5, Canada
Novartis Investigative Site
Montreal, Quebec, H3T 1E2, Canada
Novartis Investigative Site
Beijing, 100036, China
Novartis Investigative Site
Beijing, 100730, China
Novartis Investigative Site
Beijing, 102200, China
Novartis Investigative Site
Shanghai, 200032, China
Novartis Investigative Site
Bron, 69677, France
Novartis Investigative Site
Clichy, 92110, France
Novartis Investigative Site
Montpellier, 34298, France
Novartis Investigative Site
Nantes, 44093, France
Novartis Investigative Site
Pessac, 33604, France
Novartis Investigative Site
Toulouse, 31059, France
Novartis Investigative Site
Erlangen, 91054, Germany
Novartis Investigative Site
Essen, 45147, Germany
Novartis Investigative Site
München, 80377, Germany
Novartis Investigative Site
Budapest, H-1083, Hungary
Novartis Investigative Site
Szeged, 6725, Hungary
Novartis Investigative Site
Cona, FE, 44124, Italy
Novartis Investigative Site
Genova, GE, 16132, Italy
Novartis Investigative Site
Milan, MI, 20133, Italy
Novartis Investigative Site
Rozzano, MI, 20089, Italy
Novartis Investigative Site
Pisa, PI, 56126, Italy
Novartis Investigative Site
Roma, RM, 00168, Italy
Novartis Investigative Site
Roma, RM, 00189, Italy
Novartis Investigative Site
Milan, 20141, Italy
Novartis Investigative Site
Rotterdam, South Holland, 3015 GD, Netherlands
Novartis Investigative Site
Utrecht, 3584 CX, Netherlands
Novartis Investigative Site
Gdansk, 80-214, Poland
Novartis Investigative Site
Gliwice, 44 101, Poland
Novartis Investigative Site
Krakow, 30-688, Poland
Novartis Investigative Site
Poznan, 60-355, Poland
Novartis Investigative Site
Warsaw, 02-351, Poland
Novartis Investigative Site
Warsaw, 04-141, Poland
Novartis Investigative Site
Seoul, 03080, South Korea
Novartis Investigative Site
Seoul, 03722, South Korea
Novartis Investigative Site
Seoul, 05505, South Korea
Novartis Investigative Site
L'Hospitalet de Llobregat, Barcelona, 08907, Spain
Novartis Investigative Site
Oviedo, Principality of Asturias, 33011, Spain
Novartis Investigative Site
Barcelona, 08035, Spain
Novartis Investigative Site
Madrid, 28034, Spain
Novartis Investigative Site
Madrid, 28040, Spain
Novartis Investigative Site
Madrid, 28041, Spain
Novartis Investigative Site
Salamanca, 37007, Spain
Novartis Investigative Site
London, SE5 9RS, United Kingdom
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Study Officials
- STUDY DIRECTOR
Novartis Pharmaceuticals
Novartis Pharmaceuticals
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- phase 3
- Allocation
- RANDOMIZED
- Masking
- NONE
- Purpose
- TREATMENT
- Intervention Model
- PARALLEL
- Sponsor Type
- INDUSTRY
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
December 19, 2024
First Posted
January 20, 2025
Study Start
May 30, 2025
Primary Completion (Estimated)
December 8, 2028
Study Completion (Estimated)
January 23, 2034
Last Updated
April 30, 2026
Record last verified: 2026-04
Data Sharing
- IPD Sharing
- Will share
Novartis is committed to sharing with qualified external researchers, access to patient-level data and supporting clinical documents from eligible studies. These requests are reviewed and approved by an independent review panel on the basis of scientific merit. All data provided is anonymized to respect the privacy of patients who have participated in the trial in line with applicable laws and regulations. This trial data availability is according to the criteria and process described on www.clinicalstudydatarequest.com