Site-specific polyethylene glycolylated (pegylated) asparaginase, preparation method therefor and use thereof
AssigneesZonhon Biopharma Institute Inc., Gensun Institute of Biomedicine Co., Ltd.
InventorsBruce Yong Ma, Jun Wang, He Wang, Chunlin Xu, Yifei Chen, Yaofang Wang
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Abstract
The present application discloses a PEGylated asparaginase and use thereof. In this application, the polyethylene glycol (PEG) is coupled to the N-terminal amino of 1 or 2 subunits of L-asparaginase, and the molecular weight of the PEG is 30-40 KDa. The PEG is preferably branched and has an aldehyde group serving as an activating group. The PEGylated asparaginase is useful in the preparation of anti-tumor drugs.
Claims11
A site-specific di-polyethylene glycolylated (diPEGylated) L-asparaginase or a pharmaceutically acceptable salt or complex thereof, wherein each of N-terminal aminos of 2 out of 4 subunits of the diPEGylated L-asparaginase is coupled to one polyethylene glycol (PEG) molecule separately, wherein the PEG molecule prior to coupling to the L-asparaginase is branched and has a molecular weight of 30-40 KDa, and wherein the diPEGylated L-asparaginase has the general structural formula below:
- wherein R is H or a C1-C4 alkyl, n is an integer from 320 to 455, P is an integer from 1 to 4, AA is an N-terminal L-amino acid residue, m is an integer from 0 to 5, S is 2, and ASP is L-asparaginase.
Dependencies are inferred from the claim text.