Indian Journal of Nuclear Medicine

ORIGINAL ARTICLE
Year
: 2021  |  Volume : 36  |  Issue : 3  |  Page : 237--244

Automated radiosynthesis, quality control, and biodistribution of Ga-68 pentixafor: First Indian experience


Ankit Watts, Surbhi Chutani, Diksha Arora, Vasanth Madivanane, Samiksha Thakur, Monika Kamboj, Baljinder Singh 
 Department of Nuclear Medicine and PET, PGIMER, Chandigarh, India

Correspondence Address:
Dr. Baljinder Singh
Department of Nuclear Medicine, PGIMER, Chandigarh
India

Background: Chemokine receptor CXCR4 is overexpressed in more than 27 different human tumors that make it a promising target in oncology. Ga-68 Pentixafor is the most promising positron emission tomography tracer for imaging CXCR4 receptors; hence, the present study was carried out to optimize the radiosynthesis of Ga-68-Pentixafor using fully automated method and the quality control (QC) checks were performed before being used as a clinical product. We also studied the normal biodistribution pattern of Ga-68-pentixafor intended for the use in variety of malignancies. Materials and Methods: We optimized the automated radio-synthesis of Ga-68 Pentixafor under good manufacturing practice conditions. A total of 62 productions were carried out in a span of 4 years. Extensive QC tests were performed to check for potency, identity, efficacy, and stability of the tracer. Biodistribution of Ga-68 Pentixafor was investigated in a healthy volunteer to determine normal range of standardized uptake valuemaximum (SUVmax) values in various organs. Results: The radiotracer was prepared successfully in 57/62 productions with radiochemical purity of >99%. Mean radiolabelling efficiency of 73.1% ± 7.7% (n = 57) was obtained with synthesis time approximatively of 34 min. The radiolabeled complex showed no signs of dissociation up to 4 h at the room temperature. Ga-68 Pentixafor upon incubation with human serum was found to be stable at 37°C for 4 h. The highest normal organ uptake was seen in urinary bladder (SUVmean = 146.0), spleen (SUVmean = 6.80) followed by kidneys (SUVmean = 4.99). Conclusion: Using the automated radiosynthesis, Ga-68 Pentixafor exhibited good radiolabelling efficiency with excellent in vitro and in vivo stability and favorable biodistribution showing clinical applicability of the tracer.


How to cite this article:
Watts A, Chutani S, Arora D, Madivanane V, Thakur S, Kamboj M, Singh B. Automated radiosynthesis, quality control, and biodistribution of Ga-68 pentixafor: First Indian experience.Indian J Nucl Med 2021;36:237-244


How to cite this URL:
Watts A, Chutani S, Arora D, Madivanane V, Thakur S, Kamboj M, Singh B. Automated radiosynthesis, quality control, and biodistribution of Ga-68 pentixafor: First Indian experience. Indian J Nucl Med [serial online] 2021 [cited 2021 Dec 3 ];36:237-244
Available from: https://www.ijnm.in/article.asp?issn=0972-3919;year=2021;volume=36;issue=3;spage=237;epage=244;aulast=Watts;type=0