Photodynamic Therapy of Primary Localized Prostate Cancer With the SpectraCure P18 System

NCT06807359 | Recruiting Phase 1 FDA Drug FDA Device

• 1 other identifier: SPC11-02-110
• Study Type: interventional
• Target: 43
• Locations: 2 countries
• Sites: 3

Brief Summary

The goal of this study is to obtain safety data, establish dose parameters, and effectiveness of treatment for the SpectraCure P18 System with IDOSE®, together with verteporfin for injection (VFI) as photosensitizer, for the treatment of primary localized prostate cancer. The study will be divided into two parts, with Phase I, dose-escalation, to study safety and establish an effective light dose, followed by Phase II, cohort expansion, to evaluate clinical efficacy and confirm safety/tolerability. The subjects will be followed for a period of 18 months to determine the primary outcome. The long-term follow-up is an additional 18 months, i.e. a total of 36 months. Interstitial Photodynamic Therapy (PDT) will be performed during general anesthesia. Optical fibers will be inserted into the prostate with a transperineal approach using transrectal ultrasound guidance. The intent is to deliver an adequate light dose throughout the prostate. Subjects will receive VFI intravenously, approximately 60-90 minutes prior to light delivery.

Conditions

Prostate Cancer

Outcome Measures

Primary Outcomes (3)

• Safety of treatment

  Number of participants with treatment related adverse events as assessed by CTCAE v5.0 related to therapy per protocol. Dose limiting toxicities are defined as grade 3 non-hematologic or grade 4 hematologic toxicities that are possibly, probably or definitely related to PDT.

  Within 4 weeks of treatment in each cohort.

• Safety - Damage to the periprostatic tissue mediated by PDT

  Potential damage to the periprostatic tissue will be evaluated by contrast-enhanced and not-contrast enhanced MRI.

  5-9 days following PDT

• Treatment efficacy

  Percentage of subjects with negative in-field biopsies (histopathologically tumor-free)

  6 and 18 months post PDT

Secondary Outcomes (5)

• Adequacy of effectiveness

  Within 1 week following PDT

• Treatment efficacy

  6 and 18 months post PDT

• Device performance

  Day of PDT

• Percentage of subjects with biochemical failure

  6 and 10 weeks, 6, 18, 24 and 36 months post PDT

• Percentage of subjects with extra prostatic or distant disease

  6 and 18 months post PDT

Study Arms (1)

PDT with VFI

EXPERIMENTAL

Interstitial Photodynamic Therapy (PDT) and Verteporfin for Injection (VFI)

Device: Photodynamic Therapy (PDT); Drug: Verteporfin Injection

Interventions

Verteporfin Injection DRUG

Verteporfin for Injection (VFI), photosensitizing drug, will be administered intravenously at a dose of 15 mg/m2 body surface area.

Also known as: Visudyne

PDT with VFI

Photodynamic Therapy (PDT) DEVICE

The PDT treatment is provided with the SpectraCure P18 laser light delivery system. PDT will be performed during general anesthesia. Optical fibers will be inserted into the prostate with a transperineal approach using transrectal ultrasound guidance. The intent is to deliver an adequate light dose throughout the prostate. Subjects will receive VFI intravenously, approximately 60-90 minutes prior to light delivery. The photosensitizer is activated with light of a specific wavelength that is delivered to the tumor via optical fibers. The activated photosensitizer reacts with oxygen to form highly toxic radicals which induce cell death in the tumour. * Phase 1: Light dose escalation. Three subjects will be treated per dose level (20 - 40 J/cm2). If no dose-limiting toxicities occur, dose will be escalated (20 - 40 J/cm2) until the Recommended Phase 2 Dose (RPD2) is established. * Phase 2: Cohort expansion with the RPD2.

PDT with VFI

Eligibility Criteria

• Age: 18 Years+
• Gender Eligibility Details: Males with primary localized prostate cancer
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Subjects ≥ 18 years.
• Histologically confirmed organ-confined adenocarcinoma of the prostate cancer diagnosed within the last 9 months. Including subjects on active surveillance with evidence of disease progression and a prostate biopsy not older than 9 months.
• a. This prostate biopsy should be targeted and systematic (transperineal or transrectal are both acceptable) and include both systematic sampling with a minimum of 8 cores (4 right, 4 left) as well as MRI fusion targeted cores. The minimum number of targeted cores is two (2) but more may be included at the discretion of the surgeon.
• Gleason Score 7 (3+4 or 4+3).
• PSA ≤ 15 ng/mL.
• Lesion volume on mpMRI \< 1.5 cm3.
• Adequate stage imaging such as pelvic CT/MRI/PET scan within the last 6 months confirming localized cancer.
• \- Bone scan is optional if PSA \< 10 ng/mL.
• Treatment target volume \<50 cm3 defined by TRUS or MRI.
• Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1.
• Expected survival ≥ 36 months.
• Sufficient bone marrow reserve as indicated by; granulocyte count ≥ 1500/mm3, platelet count ≥ 100,000/mm3.
• Adequate renal function as defined by creatinine ≤ 1.5 mg /dl.
• Adequate hepatic function, based on a total bilirubin ≤ 1.5 mg/dl, serum glutamate-oxaloacetate transaminase (SGOT) ≤ 3 times the upper limit of normal, and alanine transaminase (ALT) ≤ 3 times the upper limit of normal.
• Signed Informed Consent.

You may not qualify if:

• Evidence of locally advanced, regional pelvic lymph node metastasis, or metastatic disease.
• Any suspicious for, probable, or definite extracapsular extension on pretreatment MRI
• Contralateral PIRADS 4/5 lesion (even if negative targeted biopsy)
• High volume GG1 disease in the contralateral prostate, outside of the ablation zone. High volume is defined as \>1 core of GG1 with a linear amount of carcinoma \>6mm.
• Prior radical surgery for carcinoma of the prostate, prior pelvic radiation, prior TURP, prior cryosurgery of the prostate.
• Prior treatment with any form of brachytherapy.
• Previous androgen deprivation therapy (ADT) or chemotherapy for prostate cancer.
• Prior or current bleeding diathesis.
• Tumors known to be eroding into a major blood vessel in or adjacent to the illumination site.
• Use of Alpha-reductase inhibitors (ARIs) within 90 days of enrolment.
• Any serious active or co-morbid medical conditions, laboratory abnormality, psychiatric illness, active or uncontrolled infections, or serious illnesses or medical conditions that would prevent the patient from participating or to be managed according to the protocol (according to investigator's decision).
• Mental incapacity or psychiatric illness that would interfere with the subject's ability to understand and give informed consent or to complete follow-up visits according to the judgement of the investigator.
• Contraindication for photosensitizer including:
• Porphyria or other diseases exacerbated by light.
• Known hypersensitivity to verteporfin for injection (VFI) or to any of the excipients.

Sponsors & Collaborators

• SpectraCure AB: lead

Study Sites (3)

Memorial Sloan Kettering Cancer Center

New York, New York, 10065, United States

RECRUITING

Klinik für Urologie, Universitätsklinikum Köln

Cologne, 50937, Germany

RECRUITING

Klinik und Poliklinik für Urologie, Universitätsmedizin Rostock

Rostock, Germany

RECRUITING

MeSH Terms

Conditions

Prostatic Neoplasms

Interventions

Photochemotherapy; Verteporfin

Condition Hierarchy (Ancestors)

Genital Neoplasms, Male; Urogenital Neoplasms; Neoplasms by Site; Neoplasms; Genital Diseases, Male; Genital Diseases; Urogenital Diseases; Prostatic Diseases; Male Urogenital Diseases

Intervention Hierarchy (Ancestors)

Combined Modality Therapy; Therapeutics; Drug Therapy; Phototherapy; Porphyrins; Tetrapyrroles; Pyrroles; Azoles; Heterocyclic Compounds, 1-Ring; Heterocyclic Compounds; Heterocyclic Compounds, 4 or More Rings; Heterocyclic Compounds, Fused-Ring; Macrocyclic Compounds; Polycyclic Compounds

Study Officials

• Jonathan Fainberg, MD, MPH

  Memorial Sloan Kettering Cancer Center, New York, United States

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Kristina Holst

CONTACT

+46708233630; clinical@spectracure.com

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SEQUENTIAL
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Model Details: Prospective, open-label, non-randomized multicenter study without control group. Phase 1 - Dose-escalation Phase 2 - Cohort expansion

Study Record Dates

• First Submitted: January 29, 2025
• First Posted: February 4, 2025
• Study Start: January 6, 2025
• Primary Completion (Estimated): January 1, 2028
• Study Completion (Estimated): January 1, 2029
• Last Updated: May 1, 2026

Record last verified: 2026-04

Locations

US (1); DE (2)