The significant role of proteases in the cancer progression exposed them as potential targets for drug discovery. Regulating protease activities using protease inhibitors is one of the major therapeutic strategies for the treatment of cancer. The proteolysis activities of serine proteases in different stages of metastasis can be regulated by serine protease inhibitors. In the present work, the application of a peptide trypsin inhibitor (TI) from Oceanimonas sp. BPMS22 in cancer treatment was exploited. Initially, the process parameters such as initial medium pH, glucose, yeast extract, and sodium chloride concentrations were optimized for the maximum inhibitor activity using Response surface methodology. The maximum specific trypsin inhibitor activity observed was 40.16 ± 1.33 IU/mg protein at predicted critical conditions, glucose, 19.51 g/L; yeast extract, 23.04 g/L; sodium chloride, 28.29 g/L; and pH 7.26. Further, the apoptotic cell death of purified trypsin inhibitor-treated human chronic myeloid leukemia (K562) cell lines was demonstrated by MTT assay, AO/EtBr staining, and DNA ladder assay. The cellular oxidative stress in K562 cells was confirmed by glutathione levels and fluorescence imaging of ROS generation.
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Harish B.S. earnestly acknowledges SASTRA Deemed University for Teaching Assistantship. KBU thank Department of Science and Technology, Government of India for the financial support (SB/FTP/ETA-212/2012). SKM & KBU thank the department of Biotechnology, Government of India for the financial support (BT/PR26940/AAQ/3/887/2017) and DST-FIST Grant (SR/FST/ETI-331/2013) to SCBT, SASTRA for establishing infrastructure facilities are gratefully acknowledged.
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Harish, B.S., Raja, M.R.C., Mahapatra, S.K. et al. Production Enhancement of an Anticoagulant Trypsin Inhibitor from Oceanimonas sp. BPMS22 and Its Anti-cancer Activity. Int J Pept Res Ther 27, 197–208 (2021). https://doi.org/10.1007/s10989-020-10078-8
- Serine protease inhibitor
- Oceanimonas sp. BPMS22
- Central composite design (CCD)
- Anti-CML activity