Ni HC, Yu CY, Chen SJ, Chen LC, Lin CH, Lee WC, Chuang CH, Ho CL, Chang CH, Lee TW. Preparation and imaging of rhenium-188 labeled human serum albumin microsphere in orthotopic hepatoma rats.
Appl Radiat Isot 2015;
99:117-21. [PMID:
25748057 DOI:
10.1016/j.apradiso.2015.02.020]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 12/12/2014] [Accepted: 02/22/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVE
The present study relates to a method for preparing 188Re-labeled human serum albumin microspheres (HSAM) by 188Re(I)-tricarbonyl ion(188Re(OH2)3(CO)3)+). This radioactive particle can be subjected to radioembolization for liver tumor.
METHODS
The particle sizes and conformations of HSA microspheres were analyzed by Particle sizes-Malvern mastersizer and Scanning Electron Microscope (SEM). For preparing 188Re(I)-tricarbonyl ion, the 188ReO4- was eluted from a 188W/188Re generator with saline. The radio labeling efficiency was analyzed with high-performance liquid chromatography (HPLC). Amino borane-reduced 188ReO4-was interacted with carbon oxide to form (188Re(OH2)3(CO)3]+). For preparing 188Re-HSA microspheres, the 188Re(I)-tricarbonyl ion was added into a vial with HSA microspheres. The in vitro stability was investigated. The rat was injected with 188Re-HSA microspheres via hepatic artery route. Nano-SPECT/CT Imaging was acquired after injection of 188Re-HSA microspheres.
RESULTS
The shape of HSA microsphere was rough surfaced sphere or oval-shaped. The particle size was distributed between 20 and 35μm. In the RP-HPLC-UV chromatography, the yield of 188Re(I)-tricarbonyl ion was 75-80%. The labeling efficiency of 188Re-HSA microspheres in this method was more than 85%. After incubation, the 188Re(I)-tricarbonyl ion labeled HSA microspheres were found to be stable in vitro in normal saline and rat plasma. The result of Nano-SPECT/CT Imaging quantification analysis indicated that the percentage of injection dose %ID was maintained at 95% ID-88% ID from 2 to 72h after injection with 188Re- HSA microspheres.
CONCLUSIONS
The method of 188Re(I)-tricarbonyl ion labeled HSA microspheres can proceed with high labeling yield. Furthermore, this method provided a convenient method for radio-labeling of HSA microspheres with 188Re as well as a kit for manufacturing.
Collapse