Juvenile hormone induces reproduction via miR-1175-3p in the red imported fire ant, Solenopsis invicta
文献类型： 外文期刊
作者： Chen, Jie 1 ; Guan, Ziying 1 ; Ma, Yunjie 1 ; Shi, Qingxing 1 ; Chen, Ting 1 ; Waris, Muhammad Irfan 1 ; Lyu, Lihua 1 ; Lu, Yongyue 2 ; Qi, Guojun 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Key Lab Green Prevent & Control Fruits & Vegetable, Guangdong Prov Key Lab High Technol Plant Protect, Minist Agr & Rural Affairs,Inst Plant Protect, Guangzhou, Peoples R China
2.South China Agr Univ, Coll Plant Protect, Dept Entomol, Guangzhou, Peoples R China
3.Guangdong Acad Agr Sci, Key Lab Green Prevent & Control Fruits & Vegetable, Guangdong Prov Key Lab High Technol Plant Protect, Minist Agr & Rural Affairs,Inst Plant Protect, Guangzhou 510640, Guangdong, Peoples R China
4.South China Agr Univ, Coll Plant Protect, Dept Entomol, Guangzhou 510642, Guangdong, Peoples R China
关键词： juvenile hormone; miR-1175-3p; red imported fire ant; reproduction; social insects; vitellogenin
期刊名称：INSECT SCIENCE （ 影响因子：4.0； 五年影响因子：3.6 ）
ISSN： 1672-9609
年卷期： 2023 年
页码：
收录情况： SCI
摘要： Juvenile hormone (JH) acts in the regulation of caste differentiation between queens and workers (i.e., with or without reproductive capacity) during vitellin synthesis and oogenesis in social insects. However, the regulatory mechanisms have not yet been elucidated. Here, we identified a highly expressed microRNA (miRNA), miR-1175-3p, in the red imported fire ant, Solenopsis invicta. We found that miR-1175-3p is prominently present in the fat bodies and ovaries of workers. Furthermore, miR-1175-3p interacts with its target gene, broad-complex core (Br-C), in the fat bodies. By utilizing miR-1175-3p agomir, we successfully suppressed the expression of the Br-C protein in queens, resulting in reduced vitellogenin expression, fewer eggs, and poorly developed ovaries. Conversely, decreasing miR-1175-3p levels led to the increased expression of Br-C and vitellogenin in workers, triggering the "re-development" of the ovaries. Moreover, when queens were fed with JH, the expression of miR-1175-3p decreased, whereas the expression of vitellogenin-2 and vitellogenin-3 increased. Notably, the suppression of fertility in queens caused by treatment with agomir miR-1175-3p was completely rescued by the increased vitellogenin expression induced by being fed with JH. These results suggest the critical role of miR-1175-3p in JH-regulated reproduction, shedding light on the molecular mechanism underlying miRNA-mediated fecundity in social insects and providing a novel strategy for managing S. invicta.
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