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Chen J, Guan Z, Ma Y, Shi Q, Chen T, Waris MI, Lyu L, Lu Y, Qi G. Juvenile hormone induces reproduction via miR-1175-3p in the red imported fire ant, Solenopsis invicta. INSECT SCIENCE 2024; 31:371-386. [PMID: 37933419 DOI: 10.1111/1744-7917.13291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 09/26/2023] [Accepted: 10/10/2023] [Indexed: 11/08/2023]
Abstract
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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Affiliation(s)
- Jie Chen
- Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou, China
| | - Ziying Guan
- Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou, China
| | - Yunjie Ma
- Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou, China
- Department of Entomology, College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Qingxing Shi
- Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou, China
| | - Ting Chen
- Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou, China
| | - Muhammad Irfan Waris
- Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou, China
| | - Lihua Lyu
- Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou, China
| | - Yongyue Lu
- Department of Entomology, College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Guojun Qi
- Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou, China
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Jiang GH, Wang G, Luo C, Wang YF, Qiu JF, Peng RJ, Sima YH, Xu SQ. Mechanism of hyperproteinemia-induced damage to female reproduction in a genetic silkworm model. iScience 2023; 26:107860. [PMID: 37752953 PMCID: PMC10518704 DOI: 10.1016/j.isci.2023.107860] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/11/2023] [Accepted: 09/06/2023] [Indexed: 09/28/2023] Open
Abstract
Hyperproteinemia is a metabolic disorder characterized by abnormally elevated plasma protein concentrations (PPC) in humans and animals. Here, a genetic silkworm model with high PPC was employed to investigate the effect of elevated PPC on female reproduction. Transcriptomic analysis revealed that high PPC induces downregulation of the ovarian development-related genes and disrupts ovarian sugar metabolism. Biochemical and endocrinal analyses revealed that high PPC increases trehalose and glucose levels in hemolymph and glycogen content in the fat body through activation of the gluconeogenic pathway and inhibition of the Insulin/Insulin-like growth factor signaling pathway-the serine/threonine kinase (IIS-AKT) pathway, thus disrupting characteristic metabolic homeostasis of sugar in the ovary. These resulted in ovarian developmental delay as well as reduced number and poor quality of eggs. Insulin supplementation effectively increased egg numbers by lowering blood sugar. These collective results provide new insights into the mechanisms by which high PPC negatively affects female reproduction and support the potential therapeutic effects of insulin.
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Affiliation(s)
- Gui-Hua Jiang
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Guang Wang
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Cheng Luo
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Yong-Feng Wang
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Jian-Feng Qiu
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Ru-Ji Peng
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Yang-Hu Sima
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Shi-Qing Xu
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
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Xie X, Wang X, Liu Q, Li Y, Dong Z, Wang L, Xia Q, Zhao P. The tissue-specific expression of silkworm cuticle protein gene ASSCP2 is mediated by the Sox-2 transcription factor. Int J Biol Macromol 2023; 237:124182. [PMID: 36972822 DOI: 10.1016/j.ijbiomac.2023.124182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/21/2023] [Accepted: 03/22/2023] [Indexed: 03/29/2023]
Abstract
The silk gland of silkworm is a unique organ in which silk proteins are synthesized, secreted, and transformed into fibers. The anterior silk gland (ASG) is located at the end of the silk gland, and is thought to be involved in silk fibrosis. In our previous study, a cuticle protein, ASSCP2, was identified. This protein is specifically and highly expressed in the ASG. In this work, the transcriptional regulation mechanism of ASSCP2 gene was studied by a transgenic route. The ASSCP2 promoter was analyzed, truncated sequentially, and used to initiate the expression of EGFP gene in silkworm larvae. After egg injection, seven transgenic silkworm lines were isolated. Molecular analysis revealed that the green fluorescent signal could not be detected when the promoter was truncated to -257 bp, suggesting that the -357 to -257 sequence is the key region responsible for the transcriptional regulation of the ASSCP2 gene. Furthermore, an ASG specific transcription factor Sox-2 was identified. EMSA assays showed that Sox-2 binds with the -357 to -257 sequence, and thus regulates the tissue-specific expression of ASSCP2. This study on the transcriptional regulation of ASSCP2 gene provides theoretical and experimental basis for further studies of the regulatory mechanism of tissue-specific genes.
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Affiliation(s)
- Xiaoqian Xie
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China
| | - Xin Wang
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Sericulture, Southwest University, Chongqing 400715, China
| | - Qingsong Liu
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Sericulture, Southwest University, Chongqing 400715, China
| | - Yi Li
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Sericulture, Southwest University, Chongqing 400715, China
| | - Zhaoming Dong
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Sericulture, Southwest University, Chongqing 400715, China
| | - Lingyan Wang
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Sericulture, Southwest University, Chongqing 400715, China
| | - Qingyou Xia
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Sericulture, Southwest University, Chongqing 400715, China
| | - Ping Zhao
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Sericulture, Southwest University, Chongqing 400715, China.
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Zheng R, Yao L, Peng J, Chen Z, Yang F, Chen S, Tang Q. Comparative transcriptome analysis reveals key candidate genes mediating ovarian development in Spodoptera frugiperda fed on two host plants. Front Physiol 2022; 13:1056540. [PMID: 36457307 PMCID: PMC9705327 DOI: 10.3389/fphys.2022.1056540] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 10/31/2022] [Indexed: 09/10/2023] Open
Abstract
The fall armyworm (FAW), Spodoptera frugiperda, is a highly polyphagous lepidopteran pest, with its growth and adaptation affected by different host plants. However, little is known about the effects of host plants on ovarian development in this species. Thus, we evaluated the effects of feeding on corn (Zea mays L.) and goosegrass (Eleusine indica), on the ovarian development of S. frugiperda. Using various stages of S. frugiperda, we also evaluated the larval and pupal weights, number of eggs, and differentiation of ovarioles over time. Results showed that females fed on goosegrass had shorter ovarioles and laid less eggs than those fed on corn. Transcriptome analysis identified 3,213 genes involved in ovarian development in the fall armyworm. Of these, 881 genes were differentially expressed when fed on corn and goosegrass. The analysis also indicated that the hormone biosynthetic pathways may be involved in the reproductive system. In relation to the reproductive function, nine juvenile hormone (JH) biosynthetic genes, four 20-hydroxyecdysone (20E) biosynthetic genes, and four ovary-relevant functional genes were identified. The time course of the expression profiles of these hormone- and ovary development-related genes was measured by quantitative real-time PCR (qRT-PCR). In total, six of them showed a decreasing trend in the ovary of the FAW fed on goosegrass, while two genes showed an increasing trend. Our results showed that significant changes in the reproductive activity/ovary development in the FAW occurred in response to different diets. These results serve as bases for evaluating how optimal host plants and feeding preference affect ovarian development in the FAW.
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Affiliation(s)
| | | | | | | | | | | | - Qingfeng Tang
- Anhui Province Key Laboratory of Integrated Pest Management on Crops, Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, School of Plant Protection, Anhui Agricultural University, Hefei, China
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5
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Chen L, Zhang Z, Chen K, Yu Y, Hu B, Song H, Liu X. Transcriptional Dynamics Induced by Diapause Hormone in the Silkworm, Bombyx mori. BIOLOGY 2022; 11:1313. [PMID: 36138792 PMCID: PMC9495520 DOI: 10.3390/biology11091313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 06/03/2022] [Accepted: 06/08/2022] [Indexed: 06/16/2023]
Abstract
Diapause is a form of dormancy that organisms use to adapt to extreme environments by exhibiting developmental arrest. In the silkworm, Bombyx mori, diapause is thought to be elicited by diapause hormone (DH) signaling, which consists of interactions between DH and the DH receptor (DHR). However, the steps downstream of the DH signaling pathway are largely unknown. In the present study, we directly injected synthesized DH into the female pupae of a multivoltine, non-diapausing strain at 36 h after pupation. We found that the mRNA level of DHR declined at 4 h and recovered at 12 h after the injection of DH. Thus, we sequenced the transcriptome of the ovaries at 4 h and 12 h after the injection of DH. We identified 60 and 221 differentially expressed genes at 4 h and 12 h after the injection, respectively. All DEGs were identified, relating to 20E-related genes, JH-related genes, cellular detoxification, ribosomal proteins, lipid metabolism, and epigenetic modifications. Eleven genes were selected from the above categories to verify the transcriptome data. The qRT-PCR and RNA-Seq expression patterns of the genes were consistent, which indicated the authenticity and reliability of the transcriptome data. This study dramatically expands upon our knowledge of gene expression variation at the early phase of DH release.
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Affiliation(s)
- Lijuan Chen
- College of Life Sciences, Shanghai University, Shanghai 200444, China
| | - Zhongjie Zhang
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture, The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China
| | - Kai Chen
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture, The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China
| | - Ye Yu
- CAS Key Laboratory of Insect Developmental and Evolutionary Biology, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai 200032, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bo Hu
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture, The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China
| | - Hongsheng Song
- College of Life Sciences, Shanghai University, Shanghai 200444, China
| | - Xiaojing Liu
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture, The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China
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6
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Sun YY, Fu DY, Liu B, Wang LJ, Chen H. Roles of Krüppel Homolog 1 and Broad-Complex in the Development of Dendroctonus armandi (Coleoptera: Scolytinae). Front Physiol 2022; 13:865442. [PMID: 35464080 PMCID: PMC9019567 DOI: 10.3389/fphys.2022.865442] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 03/23/2022] [Indexed: 11/13/2022] Open
Abstract
In insects, metamorphosis is controlled by juvenile hormone (JH) and 20-hydroxyecdysone (20E). Krüppel homolog 1 (Kr-h1), a key JH-early inducible gene, is responsible for the suppression of metamorphosis and the regulation of the Broad-Complex (Br-C) gene, which is induced by 20E and functions as a “pupal specifier”. In this study, we identified and characterized the expression patterns and tissue distribution of DaKr-h1 and DaBr-C at various developmental stages of Dendroctonus armandi. The expression of the two genes was induced by JH analog (JHA) methoprene and 20E, and their functions were investigated by RNA interference. DaKr-h1 and DaBr-C were predominantly expressed in the heads of larvae and were significantly downregulated during the molting stage. In contrast, the DaKr-h1 transcript level was highest in the adult anterior midgut. DaBr-C was mainly expressed in female adults, with the highest transcript levels in the ovaries. In the larval and pupal stages, both JHA and 20E significantly induced DaKr-h1, but only 20E significantly induced DaBr-C, indicating the importance of hormones in metamorphosis. DaKr-h1 knockdown in larvae upregulated DaBr-C expression, resulting in precocious metamorphosis from larvae to pupae and the formation of miniature pupae. DaKr-h1 knockdown in pupae suppressed DaBr-C expression, increased emergence, caused abnormal morphology, and caused the formation of small-winged adults. These results suggest that DaKr-h1 is required for the metamorphosis of D. armandi. Our findings provide insight into the roles of DaKr-h1 and DaBr-C in JH-induced transcriptional repression and highlight DaKr-h1 as a potential target for metamorphosis suppression in D. armandi.
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Affiliation(s)
- Ya-Ya Sun
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
- College of Forestry, Northwest A&F University, Xianyang, China
| | - Dan-Yang Fu
- College of Forestry, Northwest A&F University, Xianyang, China
| | - Bin Liu
- College of Forestry, Northwest A&F University, Xianyang, China
| | - Lin-Jun Wang
- College of Forestry, Northwest A&F University, Xianyang, China
| | - Hui Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
- *Correspondence: Hui Chen,
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Liu H, Heng J, Wang L, Li Y, Tang X, Huang X, Xia Q, Zhao P. Homeodomain proteins POU-M2, antennapedia and abdominal-B are involved in regulation of the segment-specific expression of the clip-domain serine protease gene CLIP13 in the silkworm, Bombyx mori. INSECT SCIENCE 2022; 29:111-127. [PMID: 33860633 DOI: 10.1111/1744-7917.12916] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 02/20/2021] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
Clip-domain serine proteases (CLIPs) play important roles in insect innate immunity and development. Our previous studies indicated that CLIP13, an epidermis-specific gene, was involved in cuticle remodeling during molting and metamorphosis in the silkworm, Bombyx mori. However, the transcriptional regulatory mechanism and regulatory pathways of CLIP13 remained unclear. In the present study, we investigated CLIP13 expression and the regulation pathway controlled by 20-hydroxyecdysone (20E) in the silkworm. At the transcriptional level, expression of CLIP13 exhibited pronounced spatial and temporal specificity in different regions of the epidermis; homeodomain transcription factors POU-M2, antennapedia (Antp), and abdominal-B (Abd-B) showed similar expression change trends as CLIP13 in the head capsule, thorax, and abdomen, respectively. Furthermore, results of cell transfection assays, electrophoretic mobility shift assays, and chromatin immunoprecipitation demonstrated that POU-M2, Antp, and Abd-B were involved in the transcriptional regulation of CLIP13 by directly binding to their cis-response elements in CLIP13 promoter. RNA interference-mediated silencing of POU-M2, Antp, and Abd-B led to a decrease of CLIP13 expression in the head capsule, the epidermis of the 1st to 3rd thoracic segments and the 7th to 10th abdominal segments, respectively. Consistent with CLIP13, 20E treatment significantly upregulated expression of POU-M2, Antp, and Abd-B in the silkworm epidermis. Taken together, these data suggest that 20E positively regulates transcription of CLIP13 via homeodomain proteins POU-M2, Antp, and Abd-B in different regions of the silkworm epidermis during metamorphosis, thus affecting the molting process. Our findings provide new insight into the functions of homeodomain transcription factors in insect molting.
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Affiliation(s)
- Huawei Liu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China
- Biological Science Research Center, Southwest University, Chongqing, 400716, China
- Chongqing Key Laboratory of Sericultural Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, 400716, China
| | - Jingya Heng
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China
- Biological Science Research Center, Southwest University, Chongqing, 400716, China
| | - Luoling Wang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China
| | - Youshan Li
- College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, Shaanxi Province, 723001, China
| | - Xin Tang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China
- Biological Science Research Center, Southwest University, Chongqing, 400716, China
| | - Xuan Huang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China
- Biological Science Research Center, Southwest University, Chongqing, 400716, China
| | - Qingyou Xia
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China
- Biological Science Research Center, Southwest University, Chongqing, 400716, China
- Chongqing Key Laboratory of Sericultural Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, 400716, China
| | - Ping Zhao
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China
- Biological Science Research Center, Southwest University, Chongqing, 400716, China
- Chongqing Key Laboratory of Sericultural Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, 400716, China
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8
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Wu J, Shen G, Liu D, Xu H, Jiao M, Zhang Y, Lin Y, Zhao P. The Response of the Estrogen-Related Receptor to 20-Hydroxyecdysone in Bombyx mori: Insight Into the Function of Estrogen-Related Receptor in Insect 20-Hydroxyecdysone Signaling Pathway. Front Physiol 2022; 12:785637. [PMID: 35115955 PMCID: PMC8804299 DOI: 10.3389/fphys.2021.785637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 12/29/2021] [Indexed: 01/03/2023] Open
Abstract
Estrogen-related receptor (ERR) is an orphan nuclear receptor that was first discovered in animals, and play an important role in metabolism, development, and reproduction. Despite extensive research on the function of ERR, its transcriptional regulation mechanism remains unclear. In this study, we obtained the upstream region of Bombyx mori ERR (BmERR) and confirmed the promoter activity of this region. Interestingly, we found that 10 and 50 nM 20-hydroxyecdysone (20E) up-regulated the transcriptional activity of BmERR promoter. In addition, eight putative ecdysone response elements (EcREs) were predicted in the upstream sequence of BmERR. Based on their positions, the upstream sequence of BmERR was truncated into different fragments. Finally, an EcRE-like sequence (5′-AGTGCAGTAAACTGT-3′) was identified. Electrophoretic mobility shift assay (EMSA) and cell transfection experiments confirmed that this motif specifically binds to the complex formed between ecdysone receptor (BmEcR) and the ultraspiracle (BmUSP), a key complex in the 20E signaling pathway. Interference of BmERR or BmEcR mRNA in the embryonic cells of Bombyx mori significantly affected the expression of BmEcR and BmUSP. Overall, these results suggested that an EcRE element was identified from BmERR, and this will help understanding the detailed regulatory mechanism of ERR in insects.
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Affiliation(s)
- Jinxin Wu
- Biological Science Research Center, Southwest University, Chongqing, China
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
| | - Guanwang Shen
- Biological Science Research Center, Southwest University, Chongqing, China
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
| | - Die Liu
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
| | - Haoran Xu
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
| | - Mengyao Jiao
- Biological Science Research Center, Southwest University, Chongqing, China
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
| | - Yungui Zhang
- Biological Science Research Center, Southwest University, Chongqing, China
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
| | - Ying Lin
- Biological Science Research Center, Southwest University, Chongqing, China
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- *Correspondence: Ying Lin,
| | - Ping Zhao
- Biological Science Research Center, Southwest University, Chongqing, China
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- Ping Zhao,
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9
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Hu K, Fu B, Wang C, Liu J, Tang Y, Zhang W, Zhu J, Li Y, Pan Q, Liu F. The role of 20E biosynthesis relative gene Shadow in the reproduction of the predatory mirid bug, Cyrtorhinus lividipennis (Hemiptera: Miridae). ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2022; 109:e21854. [PMID: 34783381 DOI: 10.1002/arch.21854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 10/26/2021] [Accepted: 11/01/2021] [Indexed: 06/13/2023]
Abstract
Cytorhinus lividipennis is a natural enemy of rice planthoppers and leafhoppers. Improving the fecundity of C. lividipennis will be helpful to improve its control effect on pests. However, little is known about the hormonal regulatory mechanism of reproduction in C. lividipennis. In the current study, we examined the role of 20-hydroxyecdysone (20E) biosynthesis relative gene Shadow in the reproduction of C. lividipennis. The complementary DNA sequence of ClSad is 2018 -bp in length with an open reading frame of 1398-bp encoding 465 amino acid residues. ClSad was readily detected in nymphal and adult stages, and highly expressed in the adult stage. ClSad was highly expressed in the midgut and ovaries of adult females. Moreover, RNA interference-mediated knockdown of ClSad reduced the 20E titers and ClVg transcript level, resulting in fewer fully developed eggs and a decrease in the number of eggs laid by dsSad-injected adult females within 15 days. These results suggest that ClSad plays a critical role in the reproduction of C. lividipennis. The present study provides insights into the molecular mechanism of the ClSad gene for the reproduction of C. lividipennis.
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Affiliation(s)
- Kui Hu
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, China
| | - Baobao Fu
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, China
| | - Chuchu Wang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, China
| | - Jianqi Liu
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, China
| | - Yingying Tang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, China
| | - Wendan Zhang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, China
| | - Jun Zhu
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, China
| | - Yao Li
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, China
| | - Qinjian Pan
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou, Jiangsu, China
| | - Fang Liu
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou, Jiangsu, China
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10
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Guo MP, Qian WL, He XC, Peng J, Wang P, Wang WN, Xia QY, Cheng DJ. Genome-wide identification of target genes for transcription factor BR-C in the silkworm, Bombyx mori. INSECT SCIENCE 2021; 28:1530-1540. [PMID: 33372405 DOI: 10.1111/1744-7917.12893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/23/2020] [Accepted: 11/22/2020] [Indexed: 06/12/2023]
Abstract
Transcription factor Broad Complex (BR-C) is an ecdysone primary response gene in insects and participates in the regulation of insect growth and development. In this study, we performed a genome-wide identification of BR-C target genes in silkworm (Bombyx mori) using chromatin immunoprecipitation followed by high-throughput sequencing (ChIP-seq). As a result, a total of 1006 BR-C ChIP peaks were identified, and 15% of peaks were located in the promoter regions of 133 protein-coding genes. Functional annotation revealed that these ChIP peak-associated genes, as potential BR-C targets, were enriched in pathways related to biosynthetic process, metabolic process, and development. Transcriptome analysis and quantitative real-time polymerase chain reaction (PCR) examination revealed that developmental changes in expression patterns of a portion of potential BR-C targets, including HR96 and GC-α1, were similar to those of BR-C. ChIP-PCR examination confirmed that BR-C could directly bind to the promoters of potential targets. Further, dual luciferase assays demonstrated that HR96 promoter activity was significantly upregulated following BR-C overexpression, and this upregulation was abolished when the binding motif in the promoter was truncated. This study will be helpful for deciphering the regulatory roles of BR-C during insect growth and development.
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Affiliation(s)
- Meng-Pei Guo
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, 400715, China
| | - Wen-Liang Qian
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, 400715, China
| | - Xue-Chuan He
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, 400715, China
| | - Jian Peng
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, 400715, China
| | - Peng Wang
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, 400715, China
| | - Wei-Na Wang
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, 400715, China
| | - Qing-You Xia
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, 400715, China
- Chongqing Key Laboratory of Sericultural Science, Southwest University, Chongqing, 400715, China
| | - Dao-Jun Cheng
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, 400715, China
- Chongqing Key Laboratory of Sericultural Science, Southwest University, Chongqing, 400715, China
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11
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Arcanjo C, Trémolet G, Giusti-Petrucciani N, Duflot A, Forget-Leray J, Boulangé-Lecomte C. Susceptibility of the Non-Targeted Crustacean Eurytemora affinis to the Endocrine Disruptor Tebufenozide: A Transcriptomic Approach. Genes (Basel) 2021; 12:genes12101484. [PMID: 34680879 PMCID: PMC8536038 DOI: 10.3390/genes12101484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/19/2021] [Accepted: 09/20/2021] [Indexed: 12/13/2022] Open
Abstract
Copepods are zooplanktonic crustaceans ubiquitously widespread in aquatic systems. Although they are not the target, copepods are exposed to a wide variety of pollutants such as insect growth regulators (IGRs). The aim of this study was to investigate the molecular response of a non-targeted organism, the copepod Eurytemora affinis, to an IGR. Adult males and females were exposed to two sub-lethal concentrations of tebufenozide (TEB). Our results indicate a sex-specific response with a higher sensitivity in males, potentially due to a differential activation of stress response pathways. In both sexes, exposure to TEB triggered similar pathways to those found in targeted species by modulating the transcription of early and late ecdysone responsive genes. Among them were genes involved in cuticle metabolism, muscle contraction, neurotransmission, and gametogenesis, whose mis-regulation could lead to moult, locomotor, and reproductive impairments. Furthermore, genes involved in epigenetic processes were found in both sexes, which highlights the potential impact of exposure to TEB on future generations. This work allows identification of (i) potential biomarkers of ecdysone agonists and (ii) further assessment of putative physiological responses to characterize the effects of TEB at higher biological levels. The present study reinforces the suitability of using E. affinis as an ecotoxicological model.
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12
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Zhou J, Chen J, Shu Y. Lead stress affects the reproduction of Spodoptera litura but not by regulating the vitellogenin gene promoter. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 208:111581. [PMID: 33396104 DOI: 10.1016/j.ecoenv.2020.111581] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 10/19/2020] [Accepted: 10/27/2020] [Indexed: 06/12/2023]
Abstract
Lead (Pb) stress affects hormone-mediated responses (e.g., reproduction) in insects. In this study, the effects of Pb stress (12.5-50 mg Pb/kg in larval artificial diets) on the reproduction of the common cutworm Spodoptera litura (Lepidoptera: Noctuidae) were investigated after 7 generations. The results showed that Pb stress did not reduce the longevity of adult females, but 50 mg Pb/kg significantly reduced the longevity of adult males, regardless of the generation. After 50 mg Pb/kg stress for one or 7 generations, the peak time of egg-laying was delayed, and egg production and hatchability were decreased significantly. The vitellin content in eggs was significantly inhibited by Pb stress. The S. litura vitellogenin (Vg) gene promoter was cloned and analyzed. Multiple putative transcription factors were predicted for the 2321 bp Vg promoter region, including the TATA box, GATA, basic helix-loop-helix (bHLH) transcription factor, Broad-Complex (BR-C) binding sites, etc. The fragment from -2222 to -211 bp of the Vg promoter was the activation domain for Vg, whereas the region from -211 to -55 bp repressed the activity of the Vg promoter. The construct promoter (-782/+76) in Trichoplusia ni (Hi5) cells significantly improved Vg expression, which was not affected by Pb stress (1 or 10 mg/ml). Therefore, Pb stress significantly inhibited the reproduction of S. litura but not by regulating the Vg promoter.
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Affiliation(s)
- Jialiang Zhou
- School of Life Sciences, Jinggangshan University, Ji'an, 343009, China
| | - Jin Chen
- Department of Ecology, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Yinghua Shu
- Department of Ecology, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China.
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13
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Qian HY, Zhang X, Zhao GD, Guo HM, Li G, Xu AY. Effects of Pyriproxyfen Exposure on Reproduction and Gene Expressions in Silkworm, Bombyx mori. INSECTS 2020; 11:insects11080467. [PMID: 32722009 PMCID: PMC7469178 DOI: 10.3390/insects11080467] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/19/2020] [Accepted: 07/22/2020] [Indexed: 11/16/2022]
Abstract
The silkworm, Bombyx mori Linnaeus, is an important economic insect and a representative model organism of Lepidoptera, which has been widely used in the study of reproduction and development. The development of the silkworm's reproductive gland is easily affected by many external factors, such as chemical insecticides. After the silkworm larvae were treated with different concentrations of pyriproxyfen, the results showed that the number of eggs and hatching rate of eggs in the silkworm can be reduced by pyriproxyfen, and the concentration effects were displayed. Pyriproxyfen exposure could affect the normal development of the ovary tissue by reducing the number of oocytes and oogonia in the ovaries of silkworm fed with pyriproxyfen. We employed qRT-PCR, to detect the expressions of genes related to ovary development (Vg, Ovo, Otu, Sxl-S and Sxl-L) and hormone regulation (EcR and JHBP2) in silkworm. Our study showed that the transcription levels of Vg, Ovo, Otu, Sxl-S and Sxl-L in the treatment group were lower than those in the control group (6.08%, 61.99%, 83.51%, 99.31% and 71.95%, respectively). The transcription level of ECR was 70.22% for the control group, while that of JHBP2 was upregulated by 3.92-fold. Changes of transcription levels of these genes caused by pyriproxyfen exposure ultimately affect the absorption of nutrients, energy metabolism, ovary development and egg formation of the silkworm, thus leading to reproductive disorders of the silkworm. In general, our study revealed the response of silkworm reproduction to pyriproxyfen exposure and provided a certain reference value for the metabolism of the silkworm to pyriproxyfen.
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Affiliation(s)
- He-Ying Qian
- School of Biotechnology, Jiangsu University of Science and Technology, Jiangsu 212018, China; (X.Z.); (G.-D.Z.); (H.-M.G.); (G.L.)
- Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Jiangsu 212018, China
- Correspondence: (H.-Y.Q.); (A.-Y.X.)
| | - Xiao Zhang
- School of Biotechnology, Jiangsu University of Science and Technology, Jiangsu 212018, China; (X.Z.); (G.-D.Z.); (H.-M.G.); (G.L.)
| | - Guo-Dong Zhao
- School of Biotechnology, Jiangsu University of Science and Technology, Jiangsu 212018, China; (X.Z.); (G.-D.Z.); (H.-M.G.); (G.L.)
- Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Jiangsu 212018, China
| | - Hui-Min Guo
- School of Biotechnology, Jiangsu University of Science and Technology, Jiangsu 212018, China; (X.Z.); (G.-D.Z.); (H.-M.G.); (G.L.)
| | - Gang Li
- School of Biotechnology, Jiangsu University of Science and Technology, Jiangsu 212018, China; (X.Z.); (G.-D.Z.); (H.-M.G.); (G.L.)
- Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Jiangsu 212018, China
| | - An-Ying Xu
- School of Biotechnology, Jiangsu University of Science and Technology, Jiangsu 212018, China; (X.Z.); (G.-D.Z.); (H.-M.G.); (G.L.)
- Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Jiangsu 212018, China
- Correspondence: (H.-Y.Q.); (A.-Y.X.)
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14
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Cong J, Tao C, Zhang X, Zhang H, Cheng T, Liu C. Transgenic Ectopic Overexpression of Broad Complex ( BrC-Z2) in the Silk Gland Inhibits the Expression of Silk Fibroin Genes of Bombyx mori. INSECTS 2020; 11:insects11060374. [PMID: 32560131 PMCID: PMC7349191 DOI: 10.3390/insects11060374] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/10/2020] [Accepted: 06/12/2020] [Indexed: 11/23/2022]
Abstract
Bombyx mori silk protein genes are strictly turned on and off in different developmental stages under the hormone periodically change. The broad complex (BrC) is a transcription factor mediating 20-hydroxyecdysone action, which plays important roles during metamorphosis. Here, we observed that two isoforms of BmBrC (BmBrC-Z2 and BmBrC-Z4) exhibited contrasting expression patterns with fibroin genes (FibH, FibL and P25) in the posterior silk gland (PSG), suggesting that BmBrC may negatively regulate fibroin genes. Transgenic lines were constructed to ectopically overexpress BmBrC-Z2 in the PSG. The silk protein genes in the transgenic line were decreased to almost half of that in the wild type. The silk yield was decreased significantly. In addition, the expression levels of regulatory factors (BmKr-h1 and BmDimm) response to juvenile hormone (JH) signal were inhibited significantly. Then exogenous JH in the BmBrC-Z2 overexpressed lines can inhibit the expression of BmBrC-Z2 and activate the expression of silk protein genes and restore the silk yield to the level of the wild type. These results indicated that BmBrC may inhibit fibroin genes by repressing the JH signal pathway, which would assist in deciphering the comprehensive regulation mechanism of silk protein genes.
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Affiliation(s)
| | | | | | | | | | - Chun Liu
- Correspondence: ; Tel.: +86-23-68251753; Fax: 86-23-68251128
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15
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Shen G, Liu H, Lin Y, Xing D, Zhang Y, Xia Q. Effects of Certain cis-Regulatory Elements on Stage-Specific vitellogenin Expression in the Bombyx mori (Lepidoptera: Bombycidae). JOURNAL OF INSECT SCIENCE (ONLINE) 2020; 20:5859241. [PMID: 32556319 PMCID: PMC7300837 DOI: 10.1093/jisesa/ieaa054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Indexed: 06/11/2023]
Abstract
Bombyx mori vitellogenin (BmVg) is highly upregulated during pupation, and the 20-hydroxyecdysone and amino acids may regulate stage-specific BmVg expression. However, previous studies showed that other factors may also affect stage-specific BmVg expression. Here, we characterized effective BmVg transcription factors by identifying the corresponding cis-regulatory elements (CREs). We prepared transgenic B. mori, in which DsRed was driven by various lengths of BmVg promoter. qRT-PCR analysis showed that DsRed expression driven by a 1.0-kb BmVg promoter (VgP1.0K) was consistent with endogenous BmVg. VgP1.0K specificity was closer to the endogenous BmVg promoter than that of VgP0.8K. These results suggest that CREs affecting stage-specific BmVg expression were localized to the 1.0-kb BmVg promoter. We investigated the effects of certain CREs that could influence the stage specificity of BmVg promoter on BmVg expression in transgenic B. mori. The relative DsRed expression was significantly reduced in transgenic female B. mori and the peak in DsRed expression was delayed after E-box CRE mutation. These results demonstrate that the E-box element enhanced BmVg expression and also affected stage-specific BmVg expression. Moreover, the relative DsRed expression was significantly increased in transgenic female of B. mori after 3×BD CRE mutation in BmVg promoter. However, the stage specificity of the mutated promoter was consistent with that of the endogenous BmVg promoter. The 3×BD element downregulated BmVg but had no effect on stage-specific BmVg expression. The present study promoted the process of elucidating the regulatory network for stage-specific BmVg expression and furnished a theoretical basis for the application of BmVg promoter.
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Affiliation(s)
- Guanwang Shen
- Biological Science Research Center of Southwest University, Chongqing, China
- Chongqing Key Laboratory of Sericulture Science, Chongqing, China
| | - Hongling Liu
- Biological Science Research Center of Southwest University, Chongqing, China
- Chongqing Key Laboratory of Sericulture Science, Chongqing, China
| | - Ying Lin
- Biological Science Research Center of Southwest University, Chongqing, China
- Chongqing Key Laboratory of Sericulture Science, Chongqing, China
| | - Dongxu Xing
- Sericulture and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Yujing Zhang
- Biological Science Research Center of Southwest University, Chongqing, China
- Chongqing Key Laboratory of Sericulture Science, Chongqing, China
| | - Qingyou Xia
- Biological Science Research Center of Southwest University, Chongqing, China
- Chongqing Key Laboratory of Sericulture Science, Chongqing, China
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16
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Shen G, Chen E, Ji X, Liu L, Liu J, Hua X, Li D, Xiao Y, Xia Q. The POU Transcription Factor POU-M2 Regulates Vitellogenin Receptor Gene Expression in the Silkworm, Bombyx mori. Genes (Basel) 2020; 11:E394. [PMID: 32268540 PMCID: PMC7230888 DOI: 10.3390/genes11040394] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 04/01/2020] [Accepted: 04/03/2020] [Indexed: 01/15/2023] Open
Abstract
Vitellogenin receptors (VgRs) play critical roles in egg formation by transporting vitellogenin (Vg) into oocytes in insects. Although the function of VgR in insects is well studied, the transcriptional regulation of this gene is still unclear. Here, we cloned the promoter of the VgR gene from Bombyx mori (BmVgR), and predicted many POU cis-response elements (CREs) in its promoter. Electrophoretic mobility shift and chromatin immunoprecipitation assays showed that the POU transcription factor POU-M2 bound directly to the CREs of the promoter. Overexpression of POU-M2 in an ovarian cell line (BmNs) enhanced BmVgR transcription and promoter activity detected by quantitative reverse transcription PCR and luciferase reporter assays. Analyses of expression patterns indicated that POU-M2 was expressed in ovary at day two of wandering stage initially, followed by BmVgR. RNA interference of POU-M2 significantly reduced the transcription of BmVgR in ovary and egg-laying rate. Our results suggest a novel function for the POU factor in silkworm oogenesis by its involvement in BmVgR regulation and expands the understanding of POU factors in insect VgR expression.
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Affiliation(s)
- Guanwang Shen
- Biological Science Research Center, Southwest University, Chongqing 400716, China; (G.S.); (E.C.); (L.L.); (J.L.); (X.H.); (D.L.); (Y.X.)
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China
- Chongqing Key Laboratory of Sericulture Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing 400716, China
| | - Enxiang Chen
- Biological Science Research Center, Southwest University, Chongqing 400716, China; (G.S.); (E.C.); (L.L.); (J.L.); (X.H.); (D.L.); (Y.X.)
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China
- Chongqing Key Laboratory of Sericulture Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing 400716, China
| | - Xiaocun Ji
- Research Center of Bioenergy & Bioremediation, College of Resources and Environment, Southwest University, Chongqing 400716, China;
| | - Lina Liu
- Biological Science Research Center, Southwest University, Chongqing 400716, China; (G.S.); (E.C.); (L.L.); (J.L.); (X.H.); (D.L.); (Y.X.)
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China
- Chongqing Key Laboratory of Sericulture Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing 400716, China
| | - Jianqiu Liu
- Biological Science Research Center, Southwest University, Chongqing 400716, China; (G.S.); (E.C.); (L.L.); (J.L.); (X.H.); (D.L.); (Y.X.)
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China
- Chongqing Key Laboratory of Sericulture Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing 400716, China
| | - Xiaoting Hua
- Biological Science Research Center, Southwest University, Chongqing 400716, China; (G.S.); (E.C.); (L.L.); (J.L.); (X.H.); (D.L.); (Y.X.)
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China
- Chongqing Key Laboratory of Sericulture Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing 400716, China
| | - Dan Li
- Biological Science Research Center, Southwest University, Chongqing 400716, China; (G.S.); (E.C.); (L.L.); (J.L.); (X.H.); (D.L.); (Y.X.)
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China
- Chongqing Key Laboratory of Sericulture Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing 400716, China
| | - Yingdan Xiao
- Biological Science Research Center, Southwest University, Chongqing 400716, China; (G.S.); (E.C.); (L.L.); (J.L.); (X.H.); (D.L.); (Y.X.)
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China
- Chongqing Key Laboratory of Sericulture Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing 400716, China
| | - Qingyou Xia
- Biological Science Research Center, Southwest University, Chongqing 400716, China; (G.S.); (E.C.); (L.L.); (J.L.); (X.H.); (D.L.); (Y.X.)
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China
- Chongqing Key Laboratory of Sericulture Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing 400716, China
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17
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Asad M, Munir F, Xu X, Li M, Jiang Y, Chu L, Yang G. Functional characterization of the cis-regulatory region for the vitellogenin gene in Plutella xylostella. INSECT MOLECULAR BIOLOGY 2020; 29:137-147. [PMID: 31850544 DOI: 10.1111/imb.12632] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 11/23/2019] [Accepted: 12/11/2019] [Indexed: 06/10/2023]
Abstract
The vitellogenin gene promoter (VgP) is an essential cis-regulatory element that plays a significant role in transcription of the vitellogenin (Vg) gene, leading to the production of yolk protein in insects, including lepidopterans. However, the function of VgP is still not clear in Plutella xylostella. Here, we cloned a 5.1 kb DNA fragment of the cis-regulatory region adjacent to the 5' end of the Vg gene of P. xylostella (PxVg). We identified two promoter sites in that 5' upstream sequence of PxVg and performed in vitro analysis of two promoter sequences (PxVgP1, 4.9 kb, and PxVgP2, 2.9 kb) in the embryonic cell line of P. xylostella. PxVgP2 exhibited higher enhanced green fluorescent protein (EGFP) expression, so PxVgP2 was used for in vivo analysis. Strong EGFP fluorescence was observed in adult females and the fat body of females, with low expression in embryos. Our results suggest that PxVgP is an important stage-, tissue- and sex-specific endogenous cis-regulatory element in P. xylostella.
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Affiliation(s)
- M Asad
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, China
- Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China
- Key Laboratory of Green Pest Control, Fujian Province University, Fuzhou, China
| | - F Munir
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, China
- Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China
- Key Laboratory of Green Pest Control, Fujian Province University, Fuzhou, China
| | - X Xu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, China
- Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China
- Key Laboratory of Green Pest Control, Fujian Province University, Fuzhou, China
| | - M Li
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, China
- Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China
- Key Laboratory of Green Pest Control, Fujian Province University, Fuzhou, China
| | - Y Jiang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, China
- Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China
- Key Laboratory of Green Pest Control, Fujian Province University, Fuzhou, China
| | - L Chu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, China
- Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China
- Key Laboratory of Green Pest Control, Fujian Province University, Fuzhou, China
| | - G Yang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, China
- Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou, China
- Key Laboratory of Green Pest Control, Fujian Province University, Fuzhou, China
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18
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Ding N, Wang Z, Geng N, Zou H, Zhang G, Cao C, Li X, Zou C. Silencing Br-C impairs larval development and chitin synthesis in Lymantria dispar larvae. JOURNAL OF INSECT PHYSIOLOGY 2020; 122:104041. [PMID: 32126216 DOI: 10.1016/j.jinsphys.2020.104041] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 02/28/2020] [Accepted: 02/28/2020] [Indexed: 06/10/2023]
Abstract
In insects, 20-hydroxyecdysone (20E) mediates developmental transitions and regulates molting processes through activation of a series of transcription factors. Broad-Complex (Br-C), a vital gene in the 20E signalling pathway, plays crucial roles during insect growth processes. However, whether Br-C affects chitin synthesis in insects remains unclear. In the present study, the Br-C gene from Lymantria dispar, a notorious defoliator of forestry, was identified based on transcriptome data, and subjected to bioinformatic analysis. The regulatory functions of LdBr-C in chitin synthesis and metabolism in L. dispar larvae were analysed by RNA interference (RNAi). The full-length LdBr-C gene (1431 bp) encodes a 477 amino acid (aa) polypeptide containing a common BRcore region (391 aa) at the N-terminus and a C-terminal Zinc finger domain (56 aa) harbouring two characteristic C2H2 motifs (CXXC and HXXXXH). Phylogenetic analyses showed that LdBr-C shares highest homology and identity with Br-C isoform 7 (83.12%) of Helicoverpa armigera. Expression profiles indicate that LdBr-C was expressed throughout larval and pupal stages, and highly expressed in prepupal and pupal stages. Furthermore, LdBr-C expression was strongly induced by exogenous 20E, and suppressed dramatically after application of dsLdBr-C. Bioassay results showed that knockdown of LdBr-C caused larval developmental deformity, significant weight loss, and a mortality rate of 67.18%. Knockdown of LdBr-C significantly down-regulated transcription levels of eight critical genes (LdTre1, LdTre2, LdG6PI, LdUAP, LdCHS1, LdCHS2, LdTPS and LdCHT) related to chitin synthesis and metabolism, thereby lowering the chitin content in the midgut and epidermis. Our findings demonstrate that Br-C knockdown impairs larval development and chitin synthesis in L. dispar.
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Affiliation(s)
- Nan Ding
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Zhiying Wang
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Nannan Geng
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Hang Zou
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Guocai Zhang
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Chuanwang Cao
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Xingpeng Li
- Jilin Province Academy of Forestry Sciences, PR China
| | - Chuanshan Zou
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China.
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Wang YF, Chen XD, Wang G, Li QY, Liang XY, Sima YH, Xu SQ. Influence of hyperproteinemia on reproductive development in an invertebrate model. Int J Biol Sci 2019; 15:2170-2181. [PMID: 31592097 PMCID: PMC6775287 DOI: 10.7150/ijbs.33310] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Accepted: 06/09/2019] [Indexed: 12/25/2022] Open
Abstract
Hyperproteinemia is a severe metabolic disease characterized by abnormally elevated plasma protein concentrations (PPC). However, there is currently no reliable animal model for PPC, and the pathological mechanism of hyperproteinemia thus remains unclear. In this study, we evaluated the effects of hyperproteinemia on reproductive development in an invertebrate silkworm model with a controllable PPC and no primary disease effects. High PPC inhibited the synthesis of vitellogenin and 30K protein essential for female ovarian development in the fat body of metabolic tissues, and inhibited their transport through the hemolymph to the ovary. High PPC also induced programmed cell death in testis and ovary cells, slowed the development of germ cells, and significantly reduced the reproductive coefficient. Furthermore, the intensities and mechanisms of high-PPC-induced reproductive toxicity differed between sexes in this silkworm model.
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Affiliation(s)
- Yong-Feng Wang
- School of Biology and Basic Medical Sciences, Medical College, Soochow University, Suzhou 215123, China.,Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Xue-Dong Chen
- School of Biology and Basic Medical Sciences, Medical College, Soochow University, Suzhou 215123, China.,Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Guang Wang
- School of Biology and Basic Medical Sciences, Medical College, Soochow University, Suzhou 215123, China.,Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Qiu-Ying Li
- School of Biology and Basic Medical Sciences, Medical College, Soochow University, Suzhou 215123, China.,Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Xin-Yin Liang
- School of Biology and Basic Medical Sciences, Medical College, Soochow University, Suzhou 215123, China.,Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Yang-Hu Sima
- School of Biology and Basic Medical Sciences, Medical College, Soochow University, Suzhou 215123, China.,Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Shi-Qing Xu
- School of Biology and Basic Medical Sciences, Medical College, Soochow University, Suzhou 215123, China.,Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
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Liu H, Lin Y, Gu J, Ruan Y, Shen G, Zhang Y, Wang H, Meng Z, Li K, Xia Q. The increase of amino acids induces the expression of vitellogenin after spinning in the silkworm Bombyx mori. JOURNAL OF INSECT PHYSIOLOGY 2019; 118:103913. [PMID: 31302015 DOI: 10.1016/j.jinsphys.2019.103913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 06/19/2019] [Accepted: 07/10/2019] [Indexed: 06/10/2023]
Abstract
Silkworms are economically important insects because of the value of their silk. After finishing silk spinning, silkworms begin another important physiological process, vitellogenesis. In this study, we explored the relationship between silk spinning and vitellogenin (BmVg) expression in silkworms. In silkworms with the silk fibroin heavy chain gene knocked-out, the concentration of amino acids in the hemolymph was found to be significantly higher than that in the wild type, and the expression of BmVg was advanced at day 7 of the fifth instar stage and 0 h after spinning. Furthermore, through culturing fat body in vitro with different substances treatment including glucose, trehalose, amino acids, 20-hydroxyecdysone, and insulin, we found that only amino acids could induce BmVg expression. RNA interference of BmTOR1 in female silkworms could down-regulate BmVg transcription, resulting in shortened egg ducts and smaller eggs relative to the control. Therefore, these results showed that amino acids could induce BmVg expression through the TOR signaling pathway. Fat body cultured with amino acids in vitro and experiments involving amino acids injected into the silkworm showed that the majority of main amino acids of silk protein could induce BmVg expression. These results suggested that BmVg expression is related to silk spinning and this study would lay a foundation for elucidating the stage specificity expression of BmVg.
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Affiliation(s)
- Hongling Liu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China; Biological Science Research Center of Southwest University, Chongqing 400716, China
| | - Ying Lin
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China; Biological Science Research Center of Southwest University, Chongqing 400716, China; Chongqing Key Laboratory of Sericultural Science, Chongqing 400716, China
| | - Jianjian Gu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China; Biological Science Research Center of Southwest University, Chongqing 400716, China
| | - Yang Ruan
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China; Biological Science Research Center of Southwest University, Chongqing 400716, China
| | - Guanwang Shen
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China; Biological Science Research Center of Southwest University, Chongqing 400716, China; Chongqing Key Laboratory of Sericultural Science, Chongqing 400716, China
| | - Yujing Zhang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China; Biological Science Research Center of Southwest University, Chongqing 400716, China
| | - Huijuan Wang
- College of Biotechnology, Southwest University, Chongqing 400716, China
| | - Ziwang Meng
- College of Biotechnology, Southwest University, Chongqing 400716, China
| | - Kairong Li
- College of Biotechnology, Southwest University, Chongqing 400716, China
| | - Qingyou Xia
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China; Biological Science Research Center of Southwest University, Chongqing 400716, China; Chongqing Key Laboratory of Sericultural Science, Chongqing 400716, China.
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21
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Ma H, Abbas MN, Zhang K, Hu X, Xu M, Liang H, Kausar S, Yang L, Cui H. 20-Hydroxyecdysone regulates the transcription of the lysozyme via Broad-Complex Z2 gene in silkworm, Bombyx mori. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2019; 94:66-72. [PMID: 30716346 DOI: 10.1016/j.dci.2019.01.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 01/28/2019] [Accepted: 01/29/2019] [Indexed: 06/09/2023]
Abstract
Broad-Complex Z2 (Br-C Z2) is an ecdysone inducible transcription factor that regulates physiological, innate immune and developmental events in insects. Here, we identified an orthologue of Br-C Z2 from silkworm, Bombyx mori (BmBr-C Z2) to study its involvement in immune responses. The quantitative real-time PCR analysis revealed that BmBr-C Z2 was expressed ubiquitously in all tested tissues under normal physiological conditions. Further, developmental profile displayed that BmBr-C Z2 expression was detectable in different developmental stages, however the gene's expression was highest in the molting and pre-pupal stages. Administration of 20-hydroxyecdysone (20E) enhanced the expression levels of BmBr-C Z2 in hemocytes. The challenge with pathogens and pathogen associated molecular patterns (PAMPs) also upregulated the mRNA levels of BmBr-C Z2 in hemocytes when compared with the control. By contrast, the ectopic expression of BmBr-C Z2 remarkably increased the production of antimicrobial peptides, while the knock-down of this gene by double stranded RNA decreased their production. Dual-luciferase assay exhibited that BmBr-C Z2 induced the expression of lysozyme by directly binding to its promoter region. The treatment of Escherichia coli following the knock-down of BmBr-C Z2 strongly reduced the survival rate of silkworm larvae. These results suggest that BmBr-C Z2 plays an important biological role in the innate immune responses of silkworm by regulating immune-related genes.
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Affiliation(s)
- Hanxiu Ma
- State Key Laboratory of Silkworm Genome Biology, Southwest University, 400716, Chongqing, China; Chongqing Engineering and Technology Research Center for Silk Biomaterials and Regenerative Medicine, 400716, Chongqing, China; Southwest University Engineering Research Center for Cancer Biomedical and Translational Medicine, 400716, Chongqing, China
| | - Muhammad Nadeem Abbas
- State Key Laboratory of Silkworm Genome Biology, Southwest University, 400716, Chongqing, China; Chongqing Engineering and Technology Research Center for Silk Biomaterials and Regenerative Medicine, 400716, Chongqing, China; Southwest University Engineering Research Center for Cancer Biomedical and Translational Medicine, 400716, Chongqing, China
| | - Kui Zhang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, 400716, Chongqing, China; Chongqing Engineering and Technology Research Center for Silk Biomaterials and Regenerative Medicine, 400716, Chongqing, China; Southwest University Engineering Research Center for Cancer Biomedical and Translational Medicine, 400716, Chongqing, China
| | - Xiaosong Hu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, 400716, Chongqing, China; Chongqing Engineering and Technology Research Center for Silk Biomaterials and Regenerative Medicine, 400716, Chongqing, China; Southwest University Engineering Research Center for Cancer Biomedical and Translational Medicine, 400716, Chongqing, China
| | - Man Xu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, 400716, Chongqing, China; Chongqing Engineering and Technology Research Center for Silk Biomaterials and Regenerative Medicine, 400716, Chongqing, China; Southwest University Engineering Research Center for Cancer Biomedical and Translational Medicine, 400716, Chongqing, China
| | - Hanghua Liang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, 400716, Chongqing, China; Chongqing Engineering and Technology Research Center for Silk Biomaterials and Regenerative Medicine, 400716, Chongqing, China; Southwest University Engineering Research Center for Cancer Biomedical and Translational Medicine, 400716, Chongqing, China
| | - Saima Kausar
- State Key Laboratory of Silkworm Genome Biology, Southwest University, 400716, Chongqing, China; Chongqing Engineering and Technology Research Center for Silk Biomaterials and Regenerative Medicine, 400716, Chongqing, China; Southwest University Engineering Research Center for Cancer Biomedical and Translational Medicine, 400716, Chongqing, China
| | - Liqun Yang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, 400716, Chongqing, China; Chongqing Engineering and Technology Research Center for Silk Biomaterials and Regenerative Medicine, 400716, Chongqing, China; Southwest University Engineering Research Center for Cancer Biomedical and Translational Medicine, 400716, Chongqing, China.
| | - Hongjuan Cui
- State Key Laboratory of Silkworm Genome Biology, Southwest University, 400716, Chongqing, China; Chongqing Engineering and Technology Research Center for Silk Biomaterials and Regenerative Medicine, 400716, Chongqing, China; Southwest University Engineering Research Center for Cancer Biomedical and Translational Medicine, 400716, Chongqing, China
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22
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Liu H, Lin Y, Shen G, Gu J, Ruan Y, Wu J, Zhang Y, Li K, Long W, Jia L, Xia Q. A novel GATA transcription factor GATAβ4 promotes vitellogenin transcription and egg formation in the silkworm Bombyx mori. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2019; 107:10-18. [PMID: 30639701 DOI: 10.1016/j.ibmb.2019.01.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 12/26/2018] [Accepted: 01/10/2019] [Indexed: 06/09/2023]
Abstract
GATA transcription factors (GATAs) are widely expressed among various organisms and belong to the zinc finger protein family. GATA transcription factors play important roles in the proliferation, differentiation, and development of eukaryotes. Previous studies have shown that GATA participates in oogenesis by selective splicing in silkworms. In this study, we investigated the function of GATAs during vitellogenesis using female silkworms (Bombyx mori). Six types of GATA transcription factors were successfully cloned in the fat body of silkworms during the wandering stage and only BmGATAβ4 induced the activity of the Bombyx mori vitellogenin (BmVg) promoter. Furthermore, BmVg and BmGATAβ4 exhibited similar expression patterns in the fat body of female silkworms during the wandering stage. Electrophoretic mobility shift assays, cell transfection assays, and chromatin immunoprecipitation showed that BmGATAβ4 was involved in regulating the transcription of BmVg by directly binding to the GATA cis-response element 1 (CRE1) and GATA cis-response element 2 (CRE2) in the promoter of the BmVg gene. RNA interference of BmGATAβ4 in female silkworms downregulated BmVg transcription, resulting in a decrease in egg size and shortening of the length of egg tubes relative to the control. In summary, our results indicated that BmGATAβ4 bound to the GATA CRE1 and CRE2 motifs in the BmVg promoter to upregulate BmVg expression in the fat body of female silkworms.
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Affiliation(s)
- Hongling Liu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China; Chongqing Key Laboratory of Sericultural Science, Chongqing, 400716, China
| | - Ying Lin
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China; Chongqing Key Laboratory of Sericultural Science, Chongqing, 400716, China; Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing, 400716, China
| | - Guanwang Shen
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China; Chongqing Key Laboratory of Sericultural Science, Chongqing, 400716, China; Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing, 400716, China
| | - Jianjian Gu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China; Chongqing Key Laboratory of Sericultural Science, Chongqing, 400716, China
| | - Yang Ruan
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China; Chongqing Key Laboratory of Sericultural Science, Chongqing, 400716, China
| | - Jinxin Wu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China; Chongqing Key Laboratory of Sericultural Science, Chongqing, 400716, China
| | - Yujing Zhang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China; Chongqing Key Laboratory of Sericultural Science, Chongqing, 400716, China
| | - Kairong Li
- College of Biotechnology, Southwest University, Chongqing, 400716, China
| | - Wei Long
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China; Chongqing Key Laboratory of Sericultural Science, Chongqing, 400716, China
| | - Linbang Jia
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China; Chongqing Key Laboratory of Sericultural Science, Chongqing, 400716, China
| | - Qingyou Xia
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China; Chongqing Key Laboratory of Sericultural Science, Chongqing, 400716, China; Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing, 400716, China.
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23
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Zhen C, Yang H, Luo S, Huang J, Wu J. Broad-complex Z3 contributes to the ecdysone-mediated transcriptional regulation of the vitellogenin gene in Bombus lantschouensis. PLoS One 2018; 13:e0207275. [PMID: 30440013 PMCID: PMC6237364 DOI: 10.1371/journal.pone.0207275] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 10/29/2018] [Indexed: 01/03/2023] Open
Abstract
During reproduction, vitellogenin (Vg), as an egg yolk precursor, is critical in sexually mature females of oviparous species including some insects. The transcription of Vg is usually mediated by hormones such as juvenile hormone (JH), ecdysteroids and some neuropeptides. In this study, the structure of the Vg gene from the bumblebee Bombus lantschouensis, (BlVg) was determined by sequencing and assembly. BlVg was found to be expressed at higher levels in reproductive queens than in virgins by quantitative real-time PCR analysis. Tissue-specific expression analysis showed that BlVg was expressed at the highest levels in the fat bodies of both virgin and reproductive queens. Prediction of the BlVg promoter revealed the presence of ecdysteroid-responsive cis-regulatory elements (CREs) containing one Broad-Complex zinc-finger isoform 3 (BR-C Z3), and one ecdysone-induced protein 74A (E74A). In addition, luciferase reporter expression, driven by the 5' -regulatory region of the BlVg gene, from -1517 bp to +895 bp downstream of the start codon, was induced by treatment with 20-hydroxyecdysone (20-E). Moreover, the luciferase activity of the BlVg promoter was elevated by only BlBrC-Z3 when Sf9 cells were cotransfected with four BlBrC isoforms respectively. BlVg promoter-mediated luciferase activation was significantly reduced when the putative BrC-Z3 CRE in the promoter was mutated. In summary, this report describes the first study of vitellogenin gene regulation at the transcriptional level in bumblebees and demonstrates that the ecdysone-induced transcription of the BlVg gene is mediated by the binding of BlBrC-Z3 to the BrC-Z3 CRE in the BlVg promoter in bumblebees.
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Affiliation(s)
- Congai Zhen
- Key Laboratory for Insect-Pollinator Biology of the Ministry of Agriculture, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing, PR China
| | - Huipeng Yang
- Key Laboratory for Insect-Pollinator Biology of the Ministry of Agriculture, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing, PR China
| | - Shudong Luo
- Key Laboratory for Insect-Pollinator Biology of the Ministry of Agriculture, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing, PR China
| | - Jiaxing Huang
- Key Laboratory for Insect-Pollinator Biology of the Ministry of Agriculture, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing, PR China
- * E-mail: (JW); (JH)
| | - Jie Wu
- Key Laboratory for Insect-Pollinator Biology of the Ministry of Agriculture, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing, PR China
- * E-mail: (JW); (JH)
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24
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Uno T, Ozakiya Y, Furutani M, Sakamoto K, Uno Y, Kajiwara H, Kanamaru K, Mizoguchi A. Functional characterization of insect-specific RabX6 of Bombyx mori. Histochem Cell Biol 2018; 151:187-198. [DOI: 10.1007/s00418-018-1710-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/14/2018] [Indexed: 10/28/2022]
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25
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Shen G, Wu J, Han C, Liu H, Xu Y, Zhang H, Lin Y, Xia Q. Oestrogen-related receptor reduces vitellogenin expression by crosstalk with the ecdysone receptor pathway in female silkworm, Bombyx mori. INSECT MOLECULAR BIOLOGY 2018; 27:454-463. [PMID: 29603466 DOI: 10.1111/imb.12385] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Oestrogen-related receptor (ERR) is involved in oestrogen receptor (ER) signalling pathways owing to its similarity to ER in terms of domain structure and co-activator and response elements. Although insects lack ER, they harbour an ERR gene that is thought to modulate metabolism and energy conversion via an unknown mechanism. The present study investigated the function of ERR in insects using female silkworm (Bombyx mori, Bm). We found that the expression of B. mori vitellogenin (BmVg) and B. mori ERR (BmERR) in the fat bodies of female silkworms at different stages of development exhibited alternating patterns, and RNA interference of BmERR in females induced BmVg transcription, resulting in an increase in egg weight relative to the control. Furthermore, BmERR was found to be involved in regulating the transcription of BmVg through an oestrogen-related receptor response element (ERRE) in the promoter of the BmVg gene, as demonstrated by electrophoretic mobility shift assay, cell transfection assay and chromatin immunoprecipitation. In summary, our results indicate that BmERR bound to the ERRE motif in the BmVg promoter reducing the expression of BmVg in the fat body of the female silkworm. To our surprise, the ERRE also showed the ability to bind the ecdysone receptor (BmEcR) and ultraspiracle complex. Thus, we surmise that ERR participates in steroid hormone signalling by engaging in crosstalk with the ER pathway in vertebrates and with the EcR pathway in insects.
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Affiliation(s)
- G Shen
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing, China
| | - J Wu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
| | - C Han
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
| | - H Liu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
| | - Y Xu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
| | - H Zhang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
| | - Y Lin
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing, China
| | - Q Xia
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing, China
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Gouveia D, Bonneton F, Almunia C, Armengaud J, Quéau H, Degli-Esposti D, Geffard O, Chaumot A. Identification, expression, and endocrine-disruption of three ecdysone-responsive genes in the sentinel species Gammarus fossarum. Sci Rep 2018; 8:3793. [PMID: 29491422 PMCID: PMC5830573 DOI: 10.1038/s41598-018-22235-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 02/14/2018] [Indexed: 11/17/2022] Open
Abstract
Taking advantage of a large transcriptomic dataset recently obtained in the sentinel crustacean amphipod Gammarus fossarum, we developed an approach based on sequence similarity and phylogenetic reconstruction to identify key players involved in the endocrine regulation of G. fossarum. Our work identified three genes of interest: the nuclear receptors RXR and E75, and the regulator broad-complex (BR). Their involvement in the regulation of molting and reproduction, along with their sensitivity to chemical contamination were experimentally assessed by studying gene expression during the female reproductive cycle, and after laboratory exposure to model endocrine disrupting compounds (EDCs): pyriproxyfen, tebufenozide and piperonyl butoxide. RXR expression suggested a role of this gene in ecdysis and post-molting processes. E75 presented two expression peaks that suggested a role in vitellogenesis, and molting. BR expression showed no variation during molting/reproductive cycle. After exposure to the three EDCs, a strong inhibition of the inter-molt E75 peak was observed with tebufenozide, and an induction of RXR after exposure to pyriproxyfen and piperonyl butoxide. These results confirm the implication of RXR and E75 in hormonal regulation of female reproductive cycles in G. fossarum and their sensitivity towards EDCs opens the possibility of using them as specific endocrine disruption biomarkers.
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Affiliation(s)
- D Gouveia
- Irstea, UR RiverLy, Laboratoire d'écotoxicologie, centre de Lyon-Villeurbanne, 5 rue de la Doua CS 20244, F-69625, Villeurbanne, France
- Laboratoire Innovations technologiques pour la Détection et le Diagnostic (Li2D), Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, F-30207, Bagnols sur Cèze, France
| | - F Bonneton
- IGFL, Université de Lyon, CNRS UMR5242, Ecole Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, 46 allée d'Italie, F-69364, Lyon, France
| | - C Almunia
- Laboratoire Innovations technologiques pour la Détection et le Diagnostic (Li2D), Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, F-30207, Bagnols sur Cèze, France
| | - J Armengaud
- Laboratoire Innovations technologiques pour la Détection et le Diagnostic (Li2D), Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, F-30207, Bagnols sur Cèze, France
| | - H Quéau
- Irstea, UR RiverLy, Laboratoire d'écotoxicologie, centre de Lyon-Villeurbanne, 5 rue de la Doua CS 20244, F-69625, Villeurbanne, France
| | - D Degli-Esposti
- Irstea, UR RiverLy, Laboratoire d'écotoxicologie, centre de Lyon-Villeurbanne, 5 rue de la Doua CS 20244, F-69625, Villeurbanne, France
| | - O Geffard
- Irstea, UR RiverLy, Laboratoire d'écotoxicologie, centre de Lyon-Villeurbanne, 5 rue de la Doua CS 20244, F-69625, Villeurbanne, France
| | - A Chaumot
- Irstea, UR RiverLy, Laboratoire d'écotoxicologie, centre de Lyon-Villeurbanne, 5 rue de la Doua CS 20244, F-69625, Villeurbanne, France.
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Jiang J, Xu Y, Lin X. Role of Broad-Complex ( Br) and Krüppel homolog 1 ( Kr-h1) in the Ovary Development of Nilaparvata lugens. Front Physiol 2017; 8:1013. [PMID: 29270133 PMCID: PMC5724046 DOI: 10.3389/fphys.2017.01013] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 11/22/2017] [Indexed: 11/13/2022] Open
Abstract
Ovarian development plays an important role in the life history of insects and is crucial for control of the insect population. The metamorphosis of an insect is precisely regulated by the interaction of the juvenile hormone and ecdysone. To understand the role of NlBr and NlKr-h1 in ovary development, we used RNA interference (RNAi) to down-regulate the expression of Broad-Complex (Br) and Krüppel homolog 1 (Kr-h1), two important down-stream transcription factors of juvenile hormone and ecdysone signaling. We further investigated their effects on metamorphosis and ovary development. The results showed that both NlBr and NlKr-h1 are induced by ecdysone. The down-regulation of NlBr and NlKr-h1 alone or together by RNAi is more effective than the topical application of ecdysone on the number of ovarioles, suggesting the necessity of NlBr and NlKr-h1 in determining the number of ovarioles. The ovarian grade was significantly increased/decreased by the topical application of ecdysone and down-regulation of NlBr and NlKr-h1. The pre-oviposition period was also increased. When NlBr and NlKr-h1 were down-regulated together, the ovary grade was not significantly different compared to the control (dsGFP), indicating that the development of the ovary is under the control of both NlBr and NlKr-h1. The interaction between the NlBr and NlKr-h1 on the number of ovarioles and the development of the ovary indicates cross-talk between both juvenile hormone and ecdysone signaling at the transcription level in the brown planthopper. Both genes are nuclear transcription factors and may regulate signaling via down-stream genes. These results would help to both enhance the current understanding of the regulatory mechanism of the interaction between juvenile hormone and ecdysone signaling pathways during ovarian development and to design chemicals to control pests.
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Affiliation(s)
- Jianru Jiang
- College of Life Sciences, China Jiliang University, Hangzhou, China
| | - Yili Xu
- College of Life Sciences, China Jiliang University, Hangzhou, China
| | - Xinda Lin
- College of Life Sciences, China Jiliang University, Hangzhou, China
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Zhang Q, Sun W, Sun BY, Xiao Y, Zhang Z. The dynamic landscape of gene regulation during Bombyx mori oogenesis. BMC Genomics 2017; 18:714. [PMID: 28893182 PMCID: PMC5594438 DOI: 10.1186/s12864-017-4123-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 09/06/2017] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Oogenesis in the domestic silkworm (Bombyx mori) is a complex process involving previtellogenesis, vitellogenesis and choriogenesis. During this process, follicles show drastic morphological and physiological changes. However, the genome-wide regulatory profiles of gene expression during oogenesis remain to be determined. RESULTS In this study, we obtained time-series transcriptome data and used these data to reveal the dynamic landscape of gene regulation during oogenesis. A total of 1932 genes were identified to be differentially expressed among different stages, most of which occurred during the transition from late vitellogenesis to early choriogenesis. Using weighted gene co-expression network analysis, we identified six stage-specific gene modules that correspond to multiple regulatory pathways. Strikingly, the biosynthesis pathway of the molting hormone 20-hydroxyecdysone (20E) was enriched in one of the modules. Further analysis showed that the ecdysteroid 20-hydroxylase gene (CYP314A1) of steroidgenesis genes was mainly expressed in previtellogenesis and early vitellogenesis. However, the 20E-inactivated genes, particularly the ecdysteroid 26-hydroxylase encoding gene (Cyp18a1), were highly expressed in late vitellogenesis. These distinct expression patterns between 20E synthesis and catabolism-related genes might ensure the rapid decline of the hormone titer at the transition point from vitellogenesis to choriogenesis. In addition, we compared landscapes of gene regulation between silkworm (Lepidoptera) and fruit fly (Diptera) oogeneses. Our results show that there is some consensus in the modules of gene co-expression during oogenesis in these insects. CONCLUSIONS The data presented in this study provide new insights into the regulatory mechanisms underlying oogenesis in insects with polytrophic meroistic ovaries. The results also provide clues for further investigating the roles of epigenetic reconfiguration and circadian rhythm in insect oogenesis.
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Affiliation(s)
- Qiang Zhang
- Laboratory of Evolutionary and Functional Genomics, School of Life Sciences, Chongqing University, Chongqing, 400044 China
| | - Wei Sun
- Laboratory of Evolutionary and Functional Genomics, School of Life Sciences, Chongqing University, Chongqing, 400044 China
| | - Bang-Yong Sun
- Laboratory of Evolutionary and Functional Genomics, School of Life Sciences, Chongqing University, Chongqing, 400044 China
| | - Yang Xiao
- Sericulture & Agri-food Research Institute, Guangdong Academy of Agriculture Science, Guangzhou, 510640 China
| | - Ze Zhang
- Laboratory of Evolutionary and Functional Genomics, School of Life Sciences, Chongqing University, Chongqing, 400044 China
- Laboratory of Evolutionary and Functional Genomics, School of Life Sciences, Chongqing University, Chongqing, 401331 China
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Uno T, Furutani M, Sakamoto K, Uno Y, Kanamaru K, Mizoguchi A, Hiragaki S, Takeda M. Localization and functional analysis of the insect-specific RabX4 in the brain of Bombyx mori. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2017; 96:e21404. [PMID: 28707374 DOI: 10.1002/arch.21404] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Rab proteins are small monomeric GTPases/GTP-binding proteins, which form the largest branch of the Ras superfamily. The different Rab GTPases are localized to the cytosolic face of specific intracellular membranes, where they function as regulators of distinct steps in membrane trafficking. RabX4 is an insect-specific Rab protein that has no close homolog in vertebrates. There is little information about insect-specific Rab proteins. RabX4 was expressed in Escherichia coli and subsequently purified. Antibodies against Bombyx mori RabX4 were produced in rabbits for western immunoblotting and immunohistochemistry. Western blotting of neural tissues revealed a single band, at approximately 26 kD. RabX4-like immunohistochemical reactivity was restricted to neurons of the pars intercerebralis and dorsolateral protocerebrum in the brain. Further immunohistochemical analysis revealed that RabX4 colocalized with Rab6 and bombyxin in the corpus allatum, a neuronal organ that secretes neuropeptides synthesized in the brain into the hemolymph. RabX4 expression in the frontal ganglion, part of the insect stomatogastric nervous system that is found in most insect orders, was restricted to two neurons on the outer region and did not colocalize with allatotropin or Rab6. Furthermore, RNA interference of RabX4 decreased bombyxin expression levels in the brain. These findings suggest that RabX4 is involved in the neurosecretion of a secretory organ in Bombyx mori.
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Affiliation(s)
- Tomohide Uno
- Laboratory of Biological Chemistry, Department of Biofunctional Chemistry, Faculty of Agriculture, Kobe University, Hyogo, Japan
| | - Masayuki Furutani
- Laboratory of Biological Chemistry, Department of Biofunctional Chemistry, Faculty of Agriculture, Kobe University, Hyogo, Japan
| | | | - Yuichi Uno
- Department of Plant Resource Science, Faculty of Agriculture, Kobe University, Hyogo, Japan
| | - Kengo Kanamaru
- Laboratory of Biological Chemistry, Department of Biofunctional Chemistry, Faculty of Agriculture, Kobe University, Hyogo, Japan
| | - Akira Mizoguchi
- Division of Liberal Arts and Sciences, Aichi Gakuin University, Nisshin, Aichi, Japan
| | - Susumu Hiragaki
- Graduate School of Agricultural Science, Kobe University, Kobe, Japan
| | - Makio Takeda
- Graduate School of Agricultural Science, Kobe University, Kobe, Japan
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Pang R, Qiu J, Li T, Yang P, Yue L, Pan Y, Zhang W. The regulation of lipid metabolism by a hypothetical P-loop NTPase and its impact on fecundity of the brown planthopper. Biochim Biophys Acta Gen Subj 2017; 1861:1750-1758. [PMID: 28315769 DOI: 10.1016/j.bbagen.2017.03.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 02/25/2017] [Accepted: 03/14/2017] [Indexed: 01/02/2023]
Abstract
BACKGROUND Insect fecundity can be regulated by multiple genes in several important signaling pathways which form an extremely complicated regulatory network. However, there are still many genes that have significant impact on insect fecundity but their action mode are still unknown. METHODS Quantitative real-time PCR (qRT-PCR), immunofluorescence and western blot were used to study the expression profile of Nl23867 in the brown planthopper, Nilaparvata lugens. RNA interference (RNAi), RNA-seq and isobaric tags for relative and absolute quantification (iTRAQ) were performed to investigate the action mode of Nl23867 in the regulation of fecundity. High performance liquid chromatography (HPLC) analysis was performed to detect the fatty acid contents. RESULTS We show that knockdown of Nl23867, a gene encoding a hypothetical P-loop NTPase, significantly decreased fecundity of N. lugens. Underdeveloped ovaries, fewer eggs laid and reduction in vitellogenin (Vg) protein expression were observed after RNAi knockdown of Nl23867, and most of the affected genes and pathways are fatty acid metabolism-related. We further determined that Nl23867 directly impacts the palmitic acid biosynthesis by regulating the expression of palmitoyl-protein thioesterase (PPT), subsequently affecting the content of total lipids in N. lugens. CONCLUSIONS Nl23867 regulates the fecundity of N. lugens by modulating the biosynthetic pathway of palmitic acid and affecting lipid metabolism during vitellogenesis and oocyte development. GENERAL SIGNIFICANCE The presented study pioneers the exploration into how a function-unknown gene takes part in the regulation of fecundity in an insect, and will contribute to the construction of gene regulatory network for insect fecundity.
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Affiliation(s)
- Rui Pang
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Jieqi Qiu
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Tengchao Li
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Pan Yang
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Lei Yue
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yixin Pan
- ZhiXin High School, Guangzhou, 510080, China
| | - Wenqing Zhang
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China.
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Southey BR, Zhu P, Carr-Markell MK, Liang ZS, Zayed A, Li R, Robinson GE, Rodriguez-Zas SL. Characterization of Genomic Variants Associated with Scout and Recruit Behavioral Castes in Honey Bees Using Whole-Genome Sequencing. PLoS One 2016; 11:e0146430. [PMID: 26784945 PMCID: PMC4718678 DOI: 10.1371/journal.pone.0146430] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 12/15/2015] [Indexed: 12/01/2022] Open
Abstract
Among forager honey bees, scouts seek new resources and return to the colony, enlisting recruits to collect these resources. Differentially expressed genes between these behaviors and genetic variability in scouting phenotypes have been reported. Whole-genome sequencing of 44 Apis mellifera scouts and recruits was undertaken to detect variants and further understand the genetic architecture underlying the behavioral differences between scouts and recruits. The median coverage depth in recruits and scouts was 10.01 and 10.7 X, respectively. Representation of bacterial species among the unmapped reads reflected a more diverse microbiome in scouts than recruits. Overall, 1,412,705 polymorphic positions were analyzed for associations with scouting behavior, and 212 significant (p-value < 0.0001) associations with scouting corresponding to 137 positions were detected. Most frequent putative transcription factor binding sites proximal to significant variants included Broad-complex 4, Broad-complex 1, Hunchback, and CF2-II. Three variants associated with scouting were located within coding regions of ncRNAs including one codon change (LOC102653644) and 2 frameshift indels (LOC102654879 and LOC102655256). Significant variants were also identified on the 5’UTR of membrin, and 3’UTRs of laccase 2 and diacylglycerol kinase theta. The 60 significant variants located within introns corresponded to 39 genes and most of these positions were > 1000 bp apart from each other. A number of these variants were mapped to ncRNA LOC100578102, solute carrier family 12 member 6-like gene, and LOC100576965 (meprin and TRAF-C homology domain containing gene). Functional categories represented among the genes corresponding to significant variants included: neuronal function, exoskeleton, immune response, salivary gland development, and enzymatic food processing. These categories offer a glimpse into the molecular support to the behaviors of scouts and recruits. The level of association between genomic variants and scouting behavior observed in this study may be linked to the honey bee’s genomic plasticity and fluidity of transition between castes.
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Affiliation(s)
- Bruce R. Southey
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, Illinois, United States of America
| | - Ping Zhu
- Biodynamic Optical Imaging Center, College of Life Sciences, and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
| | - Morgan K. Carr-Markell
- School of Integrative Biology, Ecology, Evolution, and Conservation Biology Program, University of Illinois Urbana-Champaign, Urbana, Illinois, United States of America
| | - Zhengzheng S. Liang
- School of Molecular and Cell Biology and Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, Illinois, United States of America
| | - Amro Zayed
- Department of Biology, York University, Toronto, Ontario, Canada
| | - Ruiqiang Li
- Novogene Bioinformatics Institute, Beijing, China and Biodynamic Optical Imaging Center, Peking-Tsinghua Center for Life Sciences and School of Life Sciences, Peking University, Beijing, China
| | - Gene E. Robinson
- Carle Woese Institute for Genomic Biology, Department of Entomology, and Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Sandra L. Rodriguez-Zas
- Department of Animal Sciences, Department of Statistics, Neuroscience Program, and Carle Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
- * E-mail:
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