Feed-forward alpha particle radiotherapy ablates androgen receptor-addicted prostate cancer Journal Article


Authors: McDevitt, M. R.; Thorek, D. L. J.; Hashimoto, T.; Gondo, T.; Veach, D. R.; Sharma, S. K.; Kalidindi, T. M.; Abou, D. S.; Watson, P. A.; Beattie, B. J.; Timmermand, O. V.; Strand, S. E.; Lewis, J. S.; Scardino, P. T.; Scher, H. I.; Lilja, H.; Larson, S. M.; Ulmert, D.
Article Title: Feed-forward alpha particle radiotherapy ablates androgen receptor-addicted prostate cancer
Abstract: Human kallikrein peptidase 2 (hK2) is a prostate specific enzyme whose expression is governed by the androgen receptor (AR). AR is the central oncogenic driver of prostate cancer (PCa) and is also a key regulator of DNA repair in cancer. We report an innovative therapeutic strategy that exploits the hormone-DNA repair circuit to enable molecularly-specific alpha particle irradiation of PCa. Alpha-particle irradiation of PCa is prompted by molecularly specific-targeting and internalization of the humanized monoclonal antibody hu11B6 targeting hK2 and further accelerated by inherent DNA-repair that up-regulate hK2 (KLK2) expression in vivo. hu11B6 demonstrates exquisite targeting specificity for KLK2. A single administration of actinium-225 labeled hu11B6 eradicates disease and significantly prolongs survival in animal models. DNA damage arising from alpha particle irradiation induces AR and subsequently KLK2, generating a unique feed-forward mechanism, which increases binding of hu11B6. Imaging data in nonhuman primates support the possibility of utilizing hu11B6 in man. © 2018 The Author(s).
Keywords: survival; cancer survival; controlled study; protein expression; unclassified drug; androgen; cytotoxic agent; nonhuman; cancer radiotherapy; nuclear magnetic resonance imaging; mouse; dna damage; dna repair; animal experiment; animal model; protein; enzyme activity; immunoreactivity; animalia; monoclonal antibody; dna; drug distribution; drug clearance; androgen receptor; prostate adenocarcinoma; upregulation; antibody; enzyme; disease; alpha radiation; primates; actinium 225; cancer; human; male; article; kallikrein peptidase 2; monoclonal antibody hu11b6; monoclonal antibody hu11b6 actinium 225; monoclonal antibody hu11b6 zr 89
Journal Title: Nature Communications
Volume: 9
ISSN: 2041-1723
Publisher: Nature Publishing Group  
Date Published: 2018-04-24
Start Page: 1629
Language: English
DOI: 10.1038/s41467-018-04107-w
PROVIDER: scopus
PMCID: PMC5915579
PUBMED: 29691406
DOI/URL:
Notes: Article -- Export Date: 1 June 2018 -- Source: Scopus
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MSK Authors
  1. Peter T Scardino
    621 Scardino
  2. Michael R Mcdevitt
    118 Mcdevitt
  3. Darren Veach
    60 Veach
  4. Hans Gosta Lilja
    286 Lilja
  5. Hans David Staffan Ulmert
    49 Ulmert
  6. Philip A Watson
    17 Watson
  7. Jason S Lewis
    242 Lewis
  8. Steven M Larson
    764 Larson
  9. Howard Scher
    817 Scher
  10. Bradley Beattie
    106 Beattie
  11. Sai Kiran   Sharma
    11 Sharma