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153Sm-DOTMP

Phase 1

Bone Pain | Small molecule | Oncology |Telix Pharmaceuticals Limited|Trials Updated: May 14, 2026

153Sm-DOTMP development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Sep 2025

153Sm-DOTMP target and mechanism

Molecular targetbone
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment33

FDA Designations

No designations recorded

153Sm-DOTMP clinical trials

153Sm-DOTMP · 1 trial · 3 indications

Phase 1 1
NCT07197645Samarium Optimized for Long-lasting Analgesia in Cancerous End-stage Bone PainBone Pain
RECRUITING33 Analytics
PHASE1RECRUITING
Samarium Optimized for Long-lasting Analgesia in Cancerous End-stage Bone Pain
Bone PainUnlock trial analytics

Study Endpoints

Primary Endpoints

Incidence and severity of treatment-emergent adverse events (TEAEs) [Safety and Tolerability]
Up to 6 weeks post-dose

Incidence and severity of hematologic and non-hematologic toxicities, graded per CTCAE v5.0, assessed through 6 weeks post-dose.

Secondary Endpoints

Change from baseline in patient-reported bone pain severity using the NRS-11 scale on the form
Baseline to 16 weeks post-dose
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSEQUENTIAL
PurposeSUPPORTIVE_CARE

Treatment Arms

ArmTypeDescription
Part A - Cohort 1EXPERIMENTALDose Escalation

Interventions

NameTypeDescription
153Sm-DOTMPDRUGTLX090-Tx will be administered as a single ascending intravenous dose to participants with at least 1 confirmed painful osteoblastic bone tumor that exhibits avid uptake as shown by 99mTcdiphosphonate bone scans undertaken within 60 days of dosing.
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Eligibility Criteria

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

Inclusion Criteria: * Participants have had disease progression while on anti-cancer treatment, and are not eligible for the treatments, or their lesions are not amenable to palliative EBRT. * Participants must have a histologically confirmed diagnosis of malignancy at any time prior to their parti...

Countries:United States
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Frequently asked questions about 153Sm-DOTMP

What is 153Sm-DOTMP used for?

153Sm-DOTMP is an investigational small molecule being developed for the treatment of bone pain, specifically in patients with metastatic bone tumors and bone metastases from advanced cancer. It is currently in Phase 1 clinical development and is not yet approved by regulatory authorities.

What does 153Sm-DOTMP target?

153Sm-DOTMP targets bone tissue. It is designed to deliver the radioisotope samarium-153 to areas of bone affected by metastatic disease, with the goal of providing long-lasting analgesia for cancerous end-stage bone pain.

Who makes 153Sm-DOTMP?

153Sm-DOTMP is being developed by Telix Pharmaceuticals Limited, a biopharmaceutical company listed on the Australian Securities Exchange under the ticker symbol TLX. The company is conducting clinical trials to evaluate the drug's safety and efficacy in patients with bone pain from metastatic cancer.

What phase is 153Sm-DOTMP in?

153Sm-DOTMP is in Phase 1 clinical development. It is an investigational drug, meaning it has not been approved by the FDA or other regulatory bodies. The ongoing Phase 1 trial is currently recruiting participants to assess the treatment in patients with bone pain due to metastatic disease.

What clinical trials is 153Sm-DOTMP in?

153Sm-DOTMP is being studied in a Phase 1 clinical trial registered as NCT07197645, titled 'Samarium Optimized for Long-lasting Analgesia in Cancerous End-stage Bone Pain.' This open-label, uncontrolled study is recruiting 33 participants in the United States with bone pain from metastatic bone tumors or advanced cancer.

Is 153Sm-DOTMP the same as samarium-153?

153Sm-DOTMP is a specific formulation that incorporates the radioisotope samarium-153 (153Sm) chelated to DOTMP, a bone-seeking agent. While it contains samarium-153, it is a distinct investigational drug being developed by Telix Pharmaceuticals for the treatment of bone pain in metastatic cancer.