Navigation Links
Novel small molecules used to visualize prostate cancer

Two novel radiolabeled small molecules targeting prostate-specific membrane antigen (PSMA) have excellent potential for further development as diagnostic and therapeutic radiopharmaceuticals, according to research published this month in The Journal of Nuclear Medicine. The imaging agents123I-MIP-1072 and 123I-MIP-1095were shown to have a high sensitivity of lesion detection in bone, soft tissue and the prostate gland with minimal retention in non-target tissue.

An estimated 238,500 men will be diagnosed with prostate cancer in 2013, and 29,700 will die from the disease. Accurate diagnosis and staging of prostate cancer is critical to determining appropriate patient management. Patients with localized disease may benefit from a curative treatment, while those with bone metastases are typically treated with systemic therapy.

"Current imaging techniques have limitations in diagnosing and staging prostate cancer. New imaging approaches, including the radiolabeled small molecules 123I-MIP-1072 and 123I-MIP-1095, may assess disease status more accurately," said John J. Babich, PhD, lead author of the article "First-in-Man Evaluation of Two High-Affinity PSMA-Avid Small Molecules for Imaging Prostate Cancer." Babich continued, "Improved imaging approaches could better facilitate the selection of optimal treatment and improve patient outcomes."

Separate studies were conducted as part of phase 1 trials under an investigational new drug application to measure the potential effectiveness of the small molecules in diagnosing and staging prostate cancer. In the first study, seven patients with documented prostate cancer were administered doses of 123I-MIP-1072 and 123I-MIP-1095 two weeks apart. In the second study, six healthy volunteers received 123I-MIP-1072 only. Whole body planar imaging and single photon emission computed tomography (SPECT)/computed tomography (CT) were performed for each group, and pharmacokinetics, tissue distribution, excretion, safety and organ radiation dose were analyzed.

Both 123I-MIP-1072 and 123I-MIP-1095 visualized lesions in soft tissue, bone and the prostate gland as early as one to four hours after injection. The imaging agents cleared the blood in a biphasic manner; however, clearance of 123I-MIP-1072 was approximately five times faster, resulting in a higher lesion-to-background ratio as compared to 123I-MIP-1095. The largest organ-absorbed radiation doses for 123I-MIP-1072 were to the urinary bladder, salivary glands, and kidneys; for 123I-MIP-1095 the absorbed doses to the salivary glands, kidneys and thyroid were the largest. Both imaging agents were well tolerated by the study population.

As a result of the phase 1 findings, 123I-MIP-1072 was evaluated as a diagnostic agent in subsequent clinical trials on the basis of its higher lesion-to-background ratios and prolonged tumor retention. 123I-MIP-1095 will be clinically evaluated for radiotherapy for metastatic prostate cancer as the 131I-labeled analog.

"A more accurate method of imaging prostate cancer and prostate cancer metastases would significantly impact the clinical management of men with prostate cancer. This would provide greater certainty as to the presence and extent of disease during the course of the patient's treatment," said Babich. "Data indicate that PSMA is an excellent target for molecular imaging of prostate cancer and that radiolabeled small molecules, which bind PSMA with high affinity, can localize prostate cancer anywhere in the body. The use of SPECT for molecular imaging could represent a significant advance in cancer evaluation."


Contact: Susan Martonik
Society of Nuclear Medicine

Related medicine news :

1. Novel compound demonstrates anti-leukemic effect in zebrafish, shows promise for human treatment
2. Rutgers team discovers novel approach to stimulate immune cells
3. Novel drug candidates offer new route to controlling inflammation
4. Researchers present new findings for novel pancreatic cancer vaccine
5. Novel biomarkers reveal evidence of radiation exposure
6. VCU Massey Cancer Center sees potential in novel leukemia treatment
7. Study supports urate protection against Parkinsons disease, hints at novel mechanism
8. Novel Natural Sciences Repository Opens Web Portal
9. Novel Anti-Inflammatories May Offer a New Approach for the Treatment of Stroke
10. LA BioMed investigators, Drs. Kevin Bruhn and Noah Craft, develop novel treatment for melanoma
11. Novel radiation therapy safely treats prostate cancer and lowers the risk of recurrence
Post Your Comments:
(Date:6/25/2016)... ... ... The temporary closing of Bruton Memorial Library on June 21 due to a possible lice ... overlooked aspect of head lice: the parasite’s ability to live away from a human host, ... a necessary one in the event that lice have simply gotten out of control. , ...
(Date:6/25/2016)... ... June 25, 2016 , ... Dr. Calvin Johnson has dedicated ... has implemented orthobiologic procedures as a method for treating his patients. The procedure ... doctors to perform the treatment. Orthobiologics are substances that orthopaedic surgeons use to ...
(Date:6/24/2016)... ... June 24, 2016 , ... Those who have experienced ... feelings, many turn to unhealthy avenues, such as drug or alcohol abuse, as a ... has released tools for healthy coping following a traumatic event. , Trauma sufferers tend ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... Global law ... magazine’s 2016 Legal Elite. The attorneys chosen by their peers for this recognition are ... , Seven Greenberg Traurig Shareholders received special honors as members of this year’s Legal ...
(Date:6/24/2016)... , ... June 24, 2016 , ... People across the ... Genome magazine’s Code Talker Award, an essay contest in which patients and their families ... to be presented at the 2016 National Society of Genetic Counselors (NSGC) Annual Education ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... , June 24, 2016   Pulmatrix, Inc ., ... developing innovative inhaled drugs, announced today that it was ... Investments reconstituted its comprehensive set of U.S. and ... "This is an important milestone for Pulmatrix," said Chief ... shareholder awareness of our progress in developing drugs for ...
(Date:6/23/2016)... 2016 Any dentist who has made an implant ... process. Many of them do not even offer this as ... high laboratory costs involved. And those who ARE able to ... a high cost that the majority of today,s patients would ... Parsa Zadeh , founder of Dental Evolutions Inc. and inventor ...
(Date:6/23/2016)... June 23, 2016 Capricor ... ), a biotechnology company focused on the discovery, ... that patient enrollment in its ongoing randomized HOPE-Duchenne ... exceeded 50% of its 24-patient target. Capricor expects ... third quarter of 2016, and to report top ...
Breaking Medicine Technology: