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Tri-functional platform for construction of modular antibody fragments for in vivo 18F-PET or NIRF molecular imaging.

  • Author(s): Gamache, Raymond F
  • Zettlitz, Kirstin A
  • Tsai, Wen-Ting K
  • Collins, Jeffrey
  • Wu, Anna M
  • Murphy, Jennifer M
  • et al.

Positron emission tomography (PET) molecular imaging is a powerful tool for interrogating physiological and biochemical processes to understand the biology of disease and advance therapeutic developments. Near-infrared fluorescence (NIRF) optical imaging has become increasingly popular for intraoperative staging to enable cellular resolution imaging of tumor margins during surgical resection. In addition, engineered antibody fragments have emerged as promising molecular imaging agents given their exquisite target selectivity, rapid systemic clearance and site-selective chemical modification. We report a tri-functional platform for construction of a modular antibody fragment that can rapidly be labeled with radionuclides or fluorophores for PET or NIRF molecular imaging of prostate stem cell antigen (PSCA).

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