Development and preliminary evaluation of an integrin α2ß1-targeted PET probe as a supplement and alternative of PSMA imaging for prostate cancer.
Bioorg Med Chem
; 54: 116583, 2022 01 15.
Article
en En
| MEDLINE
| ID: mdl-34952297
ABSTRACT
An integrin α2ß1-targeted PET probe (68Ga-IABtP) was developed to serve as a supplement and alternative of PSMA imaging for prostate cancer. 68Ga-IABtP was synthesized by labeling the precursor peptide with 68Ga with 93% labeling yield and 4.14 MBq/µg specific radioactivity. 68Ga-IABtP showed no specific uptake in LNCaP prostate cancer cell with low integrin α2ß1 expression but significantly increased uptake in PC-3 prostate cancer cell with high integrin α2ß1 expression, which could be specifically blocked by the integrin α2ß1 monoclonal antibody. The efflux experiments demonstrated that 68Ga-IABtP could rapidly penetrate into PC-3 cell after cell binding, thereby prolonging the residence time in the tumor and allow enough time for probe clearance from the circulation and non-specific organs. The biodistribution study indicated that 68Ga-IABtP showed no specific accumulation in non-target organs and was quickly cleared from the kidney. The in vivo PET-CT imaging demonstrated that 68Ga-IABtP showed no specific uptake in LNCaP tumor but could specifically accumulate in the PC-3 tumor, and was rapidly cleared from spleen, intestine, kidney and liver, resulting in excellent contrast effect with low background signal and high target to non-target ratios.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Neoplasias de la Próstata
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Calicreínas
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Antígeno Prostático Específico
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Radiofármacos
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Integrina alfa2beta1
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Tomografía de Emisión de Positrones
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Desarrollo de Medicamentos
Límite:
Animals
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Humans
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Male
Idioma:
En
Revista:
Bioorg Med Chem
Asunto de la revista:
BIOQUIMICA
/
QUIMICA
Año:
2022
Tipo del documento:
Article
País de afiliación:
China