title: Synthesis and antityrosinase activities of alkyl 3,4-dihydroxybenzoates.
abstract: In insects, tyrosinase plays important roles in normal developmental processes, such as cuticular tanning, scleration, wound healing, production of opsonins, encapsulation and nodule formation for defense against foreign pathogens. Thus, tyrosinase may be regarded as a potential candidate for novel bioinsecticide development. A family of alkyl 3,4-dihydroxybenzoates (C₆-C₉), new tyrosinsase inhibitors, were synthesized. Their inhibitory effects on the activity of tyrosinase have been investigated. The results showed all of them could inhibit the activity of tyrosianse effectively. The order of potency was nonyl 3,4-dihydroxybenzoate (C₉DB) > octyl 3,4-dihydroxybenzoate(C₈DB) > heptyl 3,4-dihydroxybenzoate(C₇DB) > hexyl 3,4-dihydroxybenzoate (C₆DB). The kinetic analysis of these four compounds on tyrosinase was taken to expound their inhibitory mechanism. The research of the control of insects in agriculture was taken as C₆DB for example. C₆DB could inhibit the development and molting of Plutella xylostella effectively. To clarify its insecticidal mechanism, we researched the expression of tyrosinase in the P. xylostella treated with C₆DB by real-time quantitative PCR. The results showed C₆DB could inhibit the expression of tyrosinase in the P. xylostella as expected.
authors: Key Laboratory of Ministry of Education for Cell Biology and Tumor Cell Engineering, School of Life Science, Xiamen University, Xiamen 361005, China.
authors: Zhi-Zhen
authors: ZZ
authors: Pan
authors: Hua-Liang
authors: HL
authors: Li
authors: Xiao-Jie
authors: XJ
authors: Yu
authors: Qi-Xuan
authors: QX
authors: Zuo
authors: Guo-Xing
authors: GX
authors: Zheng
authors: Yan
authors: Y
authors: Shi
authors: Xuan
authors: X
authors: Liu
authors: Yi-Ming
authors: YM
authors: Lin
authors: Ge
authors: G
authors: Liang
authors: Qin
authors: Q
authors: Wang
authors: Qing-Xi
authors: QX
authors: Chen