A modified arginine-depleting enzyme NEI-01 inhibits growth of pancreatic cancer cells

Jeremy P.H. Chow, Yijun Cai, Daniel T.L. Chow, Steven H.K. Chung, Ka Chun Chau, Ka Ying Ng, Oscar M. Leung, Raymond M.H. Wong, Alan W.L. Law, Yu On Leung, Sui Yi Kwok, Yun Chung Leung (Corresponding Author)

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)


Arginine deprivation cancer therapy targets certain types of malignancies with positive result in many studies and clinical trials. NEI-01 was designed as a novel arginine-depleting enzyme comprising an albumin binding domain capable of binding to human serum albumin to lengthen its half-life. In the present work, NEI-01 is shown to bind to serum albumin from various species, including mice, rat and human. Single intraperitoneal administration of NEI-01 to mice reduced plasma arginine to undetectable level for at least 9 days. Treatment of NEI-01 specifically inhibited cell viability of MIA PaCa-2 and PANC-1 cancer cell lines, which were ASS1 negative. Using a human pancreatic mouse xenograft model, NEI-01 treatment significantly reduced tumor volume and weight. Our data provides proof of principle for a cancer treatment strategy using NEI-01.

Original languageEnglish
Article numbere0231633
JournalPLoS ONE
Issue number4
Publication statusPublished - Apr 2020

ASJC Scopus subject areas

  • General Biochemistry,Genetics and Molecular Biology
  • General Agricultural and Biological Sciences
  • General


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