数字农科院2.0

Nuclear Receptor Hormone Receptor 39 I.s Required For Locust M oulting By Regulating The Chitinase And Carboxypeptidase Genes

文献类型： 外文期刊

作者： Qin, Z. -Y.;Yang, Q.;Yang, Y.;Jia, P.;Ma, E. -B.;Qin, Z. -Y.;Yang, Y.;Zhao, X. -M.;Zhao, X. -M.;Jia, P.;Zhang, J.;Zhang, J.;Zhang, J. -Z.

作者机构：

关键词： nuclear receptor; LmHR39; carboxypeptidase; chitinase; Locusta migratoria

期刊名称： INSECT MOLECULAR BIOLOGY

ISSN： 0962-1075

年卷期： 2019 年 28 卷 4.0 期

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收录情况： JCR（2021版）

摘要： The nuclear receptor-mediated 20-hydroxyecdysone (20E) signalling pathway plays crucial roles in insects by initiating and regulating moulting and metamorphosis. In the present study, we identified and characterized a cDNA encoding a putative nuclear receptor protein (Locusta migratoria hormone receptor 39, LmHR39) based on L. migratoria transcriptomics data. Reverse-transcription quantitative PCR (RT-qPCR) revealed that LmHR39 shows low-level expression in the early days of fifth-instar nymphs, and peak expression occurs on day 5, which is followed by a decrease before ecdysis. LmHR39 transcription could be induced by 20E in vivo and was significantly suppressed by knocking down the expression of the L. migratoria ecdysone receptor gene and early-late gene LmHR3. After RNA interference of LmHR39 with double-stranded RNA (dsRNA), 85% of the insects showed abnormal morphology, with curly wings after moulting and delayed eclosion time. Haematoxylin and eosin staining indicated that apolysis of the integument and wing pad cuticle in the dsLmHR39-treated insects was delayed compared to that in the dsRNA for green fluorescent protein-injected control. Furthermore, RNA-sequencing and RT-qPCR analysis showed the expression level of carboxypeptidase genes (Carboxypeptidase A (CPA) and Carboxypeptidase M (CPM)) and chitin degrading genes (LmChitinase5 (LmCHT5) and LmChitinase10 (LmCHT10)) dramatically declined in the dsLmHR39-treated insects, implying that the LmHR39-mediated 20E signalling pathway is involved in the regulation of carboxypeptidase genes (CPA and CPM) and chitinase genes (LmCHT5 and LmCHT10), and participated in apolysis of the integument and wing pads during locust moulting.

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