NCT03938766

Upregulation of PSMA Receptors After Androgen Deprivation Therapy on PSMA PET/CT Imaging in Prostate Cancer

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 2 (actual)
• Sponsor: Jewish General Hospital · Academic / Other
• Sex: Male
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

Prostate specific membrane antigen (PSMA) is a unique membrane bound glycoprotein, which is overexpressed on prostate cancer cells and is well-characterized as an imaging biomarker of prostate cancer. Studies have shown that PSMA PET/CT can detect prostate cancer lesions with excellent contrast and a high detection rate even when the level of prostate specific antigen is low. PSMA imaging is considered the gold standard in imaging of biochemical recurrence, with detection rate of recurrence in 79.5% of patients, in the largest series of 1007 patients. Despite these excellent results, there remains approximately 20% of patients in whom the site of biochemical recurrence cannot be identified and further research is needed into improving detection rates. Androgen deprivation therapy (ADT), represents the standard of care treatment for most men with a rising serum PSA and no evidence of disseminated disease on imaging modalities. There has been some preliminary data that imaging patients early after initiation of ADT therapy may increase detection rates of recurrence sites. The objective of this study is to evaluate if prostate cancer patients with biochemical recurrence and negative PSMA PET/CT can demonstrate in-vivo upregulation of PSMA receptors in an attempt to improve detection rates of recurrent prostate cancer. Patients who are started on ADT when clinically indicated, will have repeat PSMA PET/CT at 4 weeks following initiation of ADT therapy.

Conditions

• Prostate Cancer

Interventions

Type	Name	Description
DIAGNOSTIC_TEST	PSMA PET/CT	Repeat PSMA PET/CT 4 weeks post initiation of clinically indicated ADT in patients with prior negative PSMA PET/CT performed for biochemical recurrence.

Timeline

• Start date: 2018-02-02
• Primary completion: 2020-02-01
• Completion: 2020-02-01
• First posted: 2019-05-06
• Last updated: 2020-02-12

Locations

1 site across 1 country: Canada