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Pb-MP0712

Phase 1

Large Cell Neuroendocrine Carcinoma | Small molecule | Oncology |Molecular Partners AG|Trials Updated: Sep 22, 2026

Pb-MP0712 target and mechanism

Molecular targetDelta-like ligand 3
Target classProtein
ModalitySmall molecule

Also known as [212Pb]Pb-MP0712

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDBiomarker
Total Trials1
Total Enrollment138

FDA Designations

No designations recorded

Pb-MP0712 clinical trials

Pb-MP0712 · 1 trial · 7 indications

Phase 1 1
NCT07278479Study of [212Pb]Pb-DOTAM-MAM279 ([212Pb]Pb-MP0712) in Patients With Small Cell Lung Cancer and Other DLL3 Expressing Solid TumorsLarge Cell Neuroendocrine Carcinoma
RECRUITING138 Analytics
PHASE1RECRUITING
Study of [212Pb]Pb-DOTAM-MAM279 ([212Pb]Pb-MP0712) in Patients With Small Cell Lung Cancer and Other DLL3 Expressing Solid Tumors
Large Cell Neuroendocrine CarcinomaUnlock trial analytics

Study Endpoints

Primary Endpoints

To assess incidence and severity of safety events following administration of [212Pb]Pb-DOTAM-MAM279
until 5 years after last dose

Type, frequency and severity of adverse events (AEs), and serious adverse events (SAEs), Adverse events of special interest (AESI) and Dose Limiting Toxicities (DLT) using the National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE)

To assess dose modifications of [212Pb]Pb-DOTAM-MAM279
until 5 years after last dose

Frequency and duration of dose changes

To estimate the maximum tolerated dose (MTD) and/or to define the recommended phase 2 dose (RP2D) for SCLC/LCNEC of the lung and epNECs
Phase 1, from start of treatment to end of first cycle (day 1 - 28)

Incidence of dose limiting toxicities

To evaluate the preliminary anti-tumor activity of [212Pb]Pb-DOTAM-MAM279 in the dose expansion part
Phase 2a only; 12 months

Objective Response Rate (ORR) in the expansion phase ORR is defined as the percentage of patients with partial response (PR) or complete response (CR) as per RECIST v1.1

Secondary Endpoints

To assess maximum concentration (Cmax) of [203Pb]Pb-DOTAM-MAM279 / [212Pb]Pb-DOTAM-MAM279
up to 7 days following [203Pb]Pb-DOTAM-MAM279 administration; up to 14 days following [212Pb]Pb-DOTAM-MAM279 administration]
To assess the area under the curve (AUC) from time 0 to the time of the last quantifiable concentration of [203Pb]Pb-DOTAM-MAM279
up to 7 days following [203Pb]Pb-DOTAM-MAM279 administration; up to 14 days following [212Pb]Pb-DOTAM-MAM279 administration]
To assess half-live(s) (t½) of [203Pb]Pb-DOTAM-MAM279 / [212Pb]Pb-DOTAM-MAM279
up to 7 days following [203Pb]Pb-DOTAM-MAM279 administration; up to 14 days following [212Pb]Pb-DOTAM-MAM279 administration]
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
[203Pb]Pb-DOTAM-MAM279/[212Pb]Pb-DOTAM-MAM279EXPERIMENTALPatients will receive \[203Pb\]Pb-DOTAM-MAM279 for Imaging/Dosimetry followed by \[212Pb\]Pb-DOTAM-MAM279 for treatment

Interventions

NameTypeDescription
[212Pb]Pb-MP0712DRUGRadioligand Therapy
[203Pb]Pb-MP0712OTHERRadioligand Imaging Agent
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites6

Key Inclusion Criteria: * Age ≥ 18 years old * Histologically or cytologically confirmed: I. advanced extensive or limited SCLC or LC NECs of the lung * SCLC (extensive stage, or limited stage) patients with progression or recurrence following at least two prior line of systemic platinum based t...

Countries:United States
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Recent Changes (Last 90 Days)

LOWSep 22, 2026NCT07278479lastUpdatePostDate: changed
LOWSep 22, 2026NCT07278479lastUpdatePostDate: changed

Frequently asked questions about Pb-MP0712

What is Pb-MP0712?

Pb-MP0712 is an investigational small molecule radiopharmaceutical developed by Molecular Partners AG for DLL3 expressing solid tumors, including large cell neuroendocrine carcinoma. It is being studied in a Phase 1 clinical trial and has not been approved by the FDA.

What is Pb-MP0712 used for in large cell neuroendocrine carcinoma?

Pb-MP0712 is being evaluated for the treatment of large cell neuroendocrine carcinoma and other DLL3 expressing solid tumors, such as small cell lung cancer, extrapulmonary neuroendocrine carcinoma, and gastroenteropancreatic neuroendocrine carcinoma. It is an investigational therapy and is not yet approved for any indication.

What does Pb-MP0712 target?

Pb-MP0712 targets delta-like ligand 3, also known as DLL3, a protein expressed on the surface of certain neuroendocrine tumors. The drug is designed to deliver radiation to DLL3 expressing cancer cells.

Who is developing Pb-MP0712?

Pb-MP0712 is being developed by Molecular Partners AG, a biopharmaceutical company listed on the SIX Swiss Exchange under the ticker MOLN. The company is conducting a Phase 1 trial of the drug in the United States.

What phase is Pb-MP0712 in?

Pb-MP0712 is in Phase 1 clinical development. The ongoing trial is recruiting participants and has an estimated enrollment of 138 patients. The drug is investigational and has not received FDA approval.

What clinical trials is Pb-MP0712 in?

Pb-MP0712 is being studied in a Phase 1 clinical trial, NCT07278479, titled Study of [212Pb]Pb-DOTAM-MAM279 ([212Pb]Pb-MP0712) in Patients With Small Cell Lung Cancer and Other DLL3 Expressing Solid Tumors. The trial is recruiting in the United States and includes conditions such as large cell neuroendocrine carcinoma and small cell lung cancer.

Is Pb-MP0712 the same as [212Pb]Pb-MP0712?

Yes, Pb-MP0712 is also known as [212Pb]Pb-MP0712. The bracketed notation indicates the radioisotope lead-212 used in the drug. Both names refer to the same investigational compound.