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Hu H, Tan D, Luo T, Tong X, Han M, Shen J, Dai F. Cyclin B3 plays pleiotropic roles in female reproductive organogenesis and early embryogenesis in the silkworm, Bombyx mori. PEST MANAGEMENT SCIENCE 2024; 80:376-387. [PMID: 37698372 DOI: 10.1002/ps.7767] [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: 03/14/2023] [Revised: 08/22/2023] [Accepted: 09/12/2023] [Indexed: 09/13/2023]
Abstract
BACKGROUND The reproductive system plays a crucial role in insect survival, reproduction and species specificity. Understanding the molecular mechanisms underlying reproductive organogenesis contributes to improving the efficiency of sterile insect technique marked by an eco-friendly pest management strategy. Lepidoptera is one of the largest orders of insects, most of which are major pests in agriculture and forestry. Our study aimed to screen the genes responsible for reproductive organogenesis and unravel the mechanism underlying female reproductive organ defects. RESULTS Morphological investigation of female reproductive organs showed a defective connection between oviductus geminus and oviductus communis on the second day of pupa (P2) in Speckled mutant silkworm. RNA_Seq identified a total of 18 049 transcripts that were expressed in the P2 female internal reproductive organs without ovary in Spc/+ compared to +Spc /+Spc . Differential expression analysis identified 312 up-regulated genes and 221 down-regulated genes in Spc/+. KEGG analysis identified 44 significantly enriched pathways. The results of qRT-PCR performed on 33 genes significantly matched the outcomes of the RNA_Seq. Dysfunction of Cyclin B3 resulted in a defective connection of the oviductus communis with the ovariole, dysfunction of oogenesis, and a petite body. Moreover, homozygous recessive lethality of Cyclin B3/Cyclin B3 occurred during early embryogenesis. CONCLUSION Our results suggest that Cyclin B3 is a pleiotropic functional gene that regulates early embryogenesis, oogenesis, development, and female reproductive organogenesis. These results showed that Cyclin B3 has significant effects on lepidopteran mortality, growth, and reproductive physiology, which might be considered a novel and potentially eco-friendly target for lepidopteran pest management. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Hai Hu
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, China
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
| | - Duan Tan
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, China
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
| | - Tianfu Luo
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, China
| | - Xiaoling Tong
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, China
| | - Minjin Han
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, China
| | - Jianghong Shen
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, China
| | - Fangyin Dai
- State Key Laboratory of Resource Insects, Southwest University, Chongqing, China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, China
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
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Tajiri R, Hirano A, Kaibara YY, Tezuka D, Chen Z, Kojima T. Notch signaling generates the "cut here line" on the cuticle of the puparium in Drosophila melanogaster. iScience 2023; 26:107279. [PMID: 37529108 PMCID: PMC10387574 DOI: 10.1016/j.isci.2023.107279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 05/25/2023] [Accepted: 06/30/2023] [Indexed: 08/03/2023] Open
Abstract
During a molt or eclosion, insects shed their cuticle, an extracellular matrix made by underlying epidermal cells, by cleavage along a defined line. This means that the "cut here line" is pre-formed on the cuticle, and its formation is indispensable for insect life. Here, we show that the proper formation of the operculum ridge (OR), which is the "cut here line" on the puparium (pupal case) of Drosophila melanogaster, involves Notch signaling activation in the epidermal cells just beneath the future OR region (OR-forming cells). The inhibition of Notch signaling causes defects in eclosion due to failure in OR cleavage, the chitin organization and several cuticular proteins localization, glucose dehydrogenase (Gld) activity, and OR-forming cell shape. Our findings provide the first insight into the molecular basis of the structure and formation of the "cut here line" on the cuticle.
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Affiliation(s)
- Reiko Tajiri
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, the University of Tokyo, Biosciences Building 501, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8562, Japan
| | - Ayaka Hirano
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, the University of Tokyo, Biosciences Building 501, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8562, Japan
| | - Yu-ya Kaibara
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, the University of Tokyo, Biosciences Building 501, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8562, Japan
| | - Daiki Tezuka
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, the University of Tokyo, Biosciences Building 501, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8562, Japan
| | - Zhengyang Chen
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, the University of Tokyo, Biosciences Building 501, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8562, Japan
| | - Tetsuya Kojima
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, the University of Tokyo, Biosciences Building 501, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8562, Japan
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Yu Y, Li T, Guo M, Xiong R, Yan D, Chen P. Possible Regulation of Larval Juvenile Hormone Titers in Bombyx mori by BmFAMeT6. INSECTS 2023; 14:644. [PMID: 37504649 PMCID: PMC10380277 DOI: 10.3390/insects14070644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/06/2023] [Accepted: 07/12/2023] [Indexed: 07/29/2023]
Abstract
Juvenile hormone (JH) plays a vital role in the growth, development, and reproduction of insects and other arthropods. Previous experiments have suggested that BmFAMeT6 could affect the duration of the silk moth's larval stage. In this study, we established the BmFAMeT6 overexpression strain and BmFAMeT6 knockout strain using the GAL4/UAS binary hybrid system and CRISPR/Cas 9 system, respectively, and found that the larval stage of the overexpression strain was shorter, while the knockout strain was longer. Our results exhibited that both the JH titers and BmKr-h1 levels in the larvae of the third instar were reduced significantly by BmFAMeT6 overexpression, but were increased obviously by BmFAMeT6 knockout. In addition, injection of farnesoic acid induced changes in the JH I and JH II levels in the hemolymphs of larvae. This study is the first to directly reveal the role of BmFAMeT6 in the regulation of insect JH titers and the relationship between farnesoic acid and JH (JH I and JH II). This provides a new perspective on regulating the growth and development of insects such as Bombyx mori.
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Affiliation(s)
- Yang Yu
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China
| | - Tian Li
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China
- Drug Discovery Research Center, Southwest Medical University, Luzhou 646099, China
| | - Meiwei Guo
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China
| | - Rong Xiong
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China
| | - Dongshen Yan
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China
| | - Ping Chen
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China
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