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A Targeted Catalytic Nanobody (T-CAN) with Asparaginolytic Activity (Poster Area) - Jun 28, 2022 - Abstract #EACR2022EACR_542; The T-CAN fusion protein also retains ASNase activity (4.30±0.26 U/mg), can bind CD19 and show increased cytotoxic activity on CD19 positive B-ALL cell lines compared to the full-length Kidrolase (percentage of live cells at 0.3 U/mL: 21.42±3.60% vs. 35.47±3.40% for REH, respectively, and 76.66±5.10% vs. 89.02±4.51% for RAJI cells). Conclusion sdASNase and T-CAN represent a strong proof-of-concept for further engineering of new, unexplored platforms for the transfer and targeting of ASNase activity and provide the basis for the formulation of ASNase-based drugs with reduced side effects and improved efficacy.
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Clinical, Journal: ANTIMETABOLIC COOPERATIVITY WITH THE CLINICALLY-APPROVED L-ASPARAGINASE AND TYROSINE KINASE INHIBITORS TO ERADICATE CML STEM CELLS. (Pubmed Central) - Mar 29, 2022 In this study we investigated the metabolic pathways responsible for CML surviving to imatinib exposure and its potential therapeutic utility to improve the efficacy of TKI against stem-like CML cells...Glutamine metabolism was inhibited by L-asparaginases such as Kidrolase or Erwinase without inducing predominant CML cell death...The combination of TKI with L-asparaginase reactivated the intinsic apoptotic pathway leading to efficient CML cell death. Thus, targeting glutamine metabolism with the clinically-approved drug Kidrolase, in combination with TKI which suppresses glycolysis, represents an effective and widely applicable therapeutic strategy for eradicating CML stem cells.
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Journal: Experimental and bioinformatics study for production of L-asparaginase from Bacillus licheniformis: a promising enzyme for medical application. (Pubmed Central) - Mar 24, 2019 The optimum conditions for maximum L-asparaginase production by the improved mutant were 39.57 °C, 7.39 pH, 20.74 h, 196.40 rpm, 0.5% glucose, 0.1% ammonium chloride, and 10 mM magnesium sulphate. Taken together, Bacillus licheniformis L-asparaginase can be considered as a promising candidate for clinical application as antileukemic agent.
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