The present application discloses compositions and methods of use of 68Ga labeled molecules. Preferably, the 68Ga is attached to a peptide targetable construct and is used in a pretargeting technique with a bispecific antibody (bsAb). The bsAb comprises at least one binding site for a disease-associated antigen, such as a tumor-associated antigen, and at least one binding site for a hapten on the targetable construct. Exemplary haptens include In-DTPA and HSG. More preferably, the bsAb is administered about 24-30 hours before the targetable construct, and detection by PET imaging occurs about 1-2 hours after the targetable construct is administered. The methods and compositions are suitable for detection, diagnosis and/or imaging of various diseases, such as cancer or infectious disease.
本申请公开了68Ga标记分子的组成和使用方法。优选地,68Ga附着在可靶向的肽构造物上,并与双特异性
抗体(bsAb)一起用于一种预靶向技术。该bsAb至少包括一个与疾病相关抗原(如肿瘤相关抗原)结合的结合位点,以及一个与可靶向构造物上的半抗原结合的结合位点。示例半抗原包括In-
DTPA和HSG。更优选地,bsAb在可靶向构造物之前约24-30小时给予,并在可靶向构造物给予后约1-2小时进行PET成像检测。这些方法和组成适用于检测、诊断和/或成像各种疾病,如癌症或传染病。