He S, Zhu J, Zi J, Zhou P, Liang J, Yu R. A novel terpenoid indole alkaloid derived from catharanthine via biotransformation by suspension-cultured cells of Catharanthus roseus.
Biotechnol Lett 2015;
37:2481-7. [PMID:
26272394 DOI:
10.1007/s10529-015-1930-1]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 08/05/2015] [Indexed: 11/26/2022]
Abstract
OBJECTIVE
Although catharanthine (1) is well known as a biosynthetic precursor of the anticancer alkaloid, vinblastine, its alternative metabolic pathways are unclear.
RESULTS
Biotransformation of 1 by suspension-cultured cells of Catharanthus roseus gave a new oxidative-cleavage product (2). The structure of 2 was determined as 3-hydroxy-4-imino-catharanthine by spectroscopic methods. Maximum conversion (9.75 %) of 2 was observed after 120 h adding 6 mg of 1/100 ml to 12-day-old suspension-cultured cells of C. roseus. Furthermore, qRT-PCR experiment was performed to reveal the effect of 1 on the expression of the genes in the biosynthetic pathway of TIA 1 up-regulated the transcript level of D4H whilst down-regulating the transcript levels of G10H, LAMT, GES, and IRS.
CONCLUSION
A new metabolite of catharanthine, 3-hydroxy-4-imino-catharanthine, is reported.
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