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Kalra RS, Soman GS, Parab PB, Mali AM, Varankar SS, Naik RR, Kamble SC, Dhanjal JK, Bapat SA. A monoclonal antibody against annexin A2 targets stem and progenitor cell fractions in tumors. Transl Oncol 2021; 15:101257. [PMID: 34715620 PMCID: PMC8564672 DOI: 10.1016/j.tranon.2021.101257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 10/19/2021] [Accepted: 10/20/2021] [Indexed: 12/26/2022] Open
Abstract
Development of a novel antibody (termed as mAb150) developed in our lab which targets annexin A2. Although there are earlier reports of another monoclonal antibody with the same target, the epitope recognized by mAb150 is novel. mAb150 is specifically recognized to target the achilles heel of cancer viz. cancer stem cells and progenitors that persist after treatments and potentially give rise to minimal residual disease.
The involvement of cancer stem cells (CSCs) in driving tumor dormancy and drug resistance is well established. Most therapeutic regimens however are ineffective in targeting these regenerative populations. We report the development and evaluation of a monoclonal antibody, mAb150, which targets the metastasis associated antigen, Annexin A2 (AnxA2) through recognition of a N-terminal epitope. Treatment with mAb150 potentiated re-entry of CSCs into the cell cycle that perturbed tumor dormancy and facilitated targeting of CSCs as was validated by in vitro and in vivo assays. Epigenetic potentiation further improved mAb150 efficacy in achieving total tumor regression by targeting regenerative populations to achieve tumor regression, specifically in high-grade serous ovarian adenocarcinoma.
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Affiliation(s)
- Rajkumar S Kalra
- National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Pune 411007, India; Savitribai Phule Pune University, Ganeshkhind, Pune 411007, India; Immune Signal Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa, 904-0495, Japan
| | - Gaurav S Soman
- National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Pune 411007, India
| | - Pradeep B Parab
- National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Pune 411007, India
| | - Avinash M Mali
- National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Pune 411007, India
| | - Sagar S Varankar
- National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Pune 411007, India; Savitribai Phule Pune University, Ganeshkhind, Pune 411007, India; Wellcome-MRC Cambridge Stem Cell Institute, Puddicombe Way, Cambridge, CB2 0AW
| | - Rutika R Naik
- National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Pune 411007, India; Savitribai Phule Pune University, Ganeshkhind, Pune 411007, India
| | - Swapnil C Kamble
- National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Pune 411007, India; Savitribai Phule Pune University, Ganeshkhind, Pune 411007, India; Department of Technology, Savitribai Phule Pune University, Ganeshkhind, Pune 411007, India
| | - Jaspreet K Dhanjal
- Department of Computational Biology, Indraprastha Institute of Information Technology Delhi, Okhla Industrial Estate, Phase III, New Delhi 110020, India
| | - Sharmila A Bapat
- National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Pune 411007, India; Savitribai Phule Pune University, Ganeshkhind, Pune 411007, India.
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