Phytochemical Analysis of Nothapodytes tomentosa and Distribution and Content of Camptothecin and its Analogues in Four Plants

Abstract

Camptothecin (CPT) and its derivatives have attracted worldwide attention because of their notable anticancer activity. However, the growing demand for CPT in the global pharmaceutical industry has caused a severe shortage of CPT-producing plant resources. In this study, phytochemical analysis of Nothapodytes tomentosa results in the isolation and identification of CPT (13) and 16 analogues (1 – 12, 14 – 17), including a new (1) and five known (9, 10, 12, 15, and 17) CPT analogues with an open E-ring. In view of the potential anticancer activity of CPT analogues with an open E-ring, the fragmentation pathways and mass spectra profiles of these six CPT analogues (1, 9, 10, 12, 15, and 17) are investigated, providing a reference for the rapid detection of these compounds in other plants. Furthermore, based on the fragmentation patterns of CPT (13) and known analogues (2 – 8, 11, 14, 16, 18 – 26), the distribution and content of these compounds in different tissues of N. tomentosa, N. nimmoniana, Camptotheca acuminata, and Ophiorrhiza japonica are further studied. Our findings not only provide an alternative plant resource for further expanding the development and utilization of CPT and its analogues, but also lay a foundation for improving the utilization of known CPT-producing plant resources.

Key words

Nothapodytes tomentosa - Nothapodytes nimmoniana - Camptotheca acuminata - Ophiorrhiza japonica - Icacinaceae - camptothecin derivatives

Publication History

Received: 15 December 2022

Accepted after revision: 11 April 2023

Accepted Manuscript online:
12 April 2023

Article published online:
28 July 2023

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