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Shen G, Liu D, Xu H, Wu J, Hou L, Yang C, Xia Q, Lin P. A Study on the Effect of Energy on the Development of Silkworm Embryos Using an Estrogen-Related Receptor. Int J Mol Sci 2023; 24:14485. [PMID: 37833932 PMCID: PMC10572312 DOI: 10.3390/ijms241914485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 09/04/2023] [Accepted: 09/19/2023] [Indexed: 10/15/2023] Open
Abstract
Energy metabolism is a fundamental process in all organisms. During silkworm (Bombyx mori) embryonic development, there is a high demand for energy due to continuous cell proliferation and differentiation. Estrogen-related receptors (ERRs) are transcriptional regulatory factors that play crucial roles in mammalian energy storage and expenditure. Although most insects have one ERR gene, it also participates in the regulation of energy metabolism, including carbohydrate metabolism in Drosophila, Aphid, and Silkworm. However, no study has reported the direct impact of energy metabolism on embryonic development in silkworms. In this study, we used transgenic technology to increase silkworm (B. mori; Bm) BmERR expression during embryonic development and explored the impact of energy on embryonic development. We found no significant change in the quality of silkworm eggs compared to that of wild-type silkworms. However, there was an increase in the consumption of vitellin, a major nutrient in embryos. This resulted in a decrease in glucose content and a significant increase in ATP content. These findings provide evidence that the acceleration of energy metabolism promotes embryonic development and enhances the motility of hatched silkworms. In addition, these results provide a novel perspective on the relationship between energy metabolism and embryonic development in other insects.
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Affiliation(s)
| | | | | | | | | | | | - Qingyou Xia
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400716, China; (G.S.); (D.L.)
| | - Ping Lin
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400716, China; (G.S.); (D.L.)
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Bresnahan ST, Döke MA, Giray T, Grozinger CM. Tissue-specific transcriptional patterns underlie seasonal phenotypes in honey bees (Apis mellifera). Mol Ecol 2021; 31:174-184. [PMID: 34643007 DOI: 10.1111/mec.16220] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 09/19/2021] [Accepted: 09/27/2021] [Indexed: 12/21/2022]
Abstract
Faced with adverse conditions, such as winter in temperate regions or hot and dry conditions in tropical regions, many insect species enter a state of diapause, a period of dormancy associated with a reduction or arrest of physical activity, development and reproduction. Changes in common physiological pathways underlie diapause phenotypes in different insect species. However, most transcriptomic studies of diapause have not simultaneously evaluated and compared expression patterns in different tissues. Honey bees (Apis mellifera) represent a unique model system to study the mechanisms underpinning diapause-related phenotypes. In winter, honey bees exhibit a classic diapause phenotype, with reduced metabolic activity, increased physiological nutritional resources and altered hormonal profiles. However, winter bees actively heat their colony by vibrating their wing muscles; thus, this tissue is not quiescent. Here, we evaluated the transcriptional profiles of flight muscle tissue and fat body tissue (involved in nutrient storage, metabolism and immune function) of winter bees. We also evaluated two behavioural phenotypes of summer bees: nurses, which exhibit high nutritional stores and low flight activity, and foragers, which exhibit low nutritional stores and high flight activity. We found winter bees and nurses have similar fat body transcriptional profiles, whereas winter bees and foragers have similar flight muscle transcriptional profiles. Additionally, differentially expressed genes were enriched in diapause-related gene ontology terms. Thus, honey bees exhibit tissue-specific transcriptional profiles associated with seasonal phenotypes, laying the groundwork for future studies evaluating the mechanisms, evolution and consequences of this tissue-specific regulation.
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Affiliation(s)
- Sean T Bresnahan
- Department of Entomology, Center for Pollinator Research, Huck Institutes of the Life Sciences, Pennsylvania State University, State College, Pennsylvania, USA.,Molecular, Cellular and Integrative Biosciences Graduate Program, Huck Institutes of the Life Sciences, Pennsylvania State University, State College, Pennsylvania, USA
| | - Mehmet A Döke
- Department of Entomology, Center for Pollinator Research, Huck Institutes of the Life Sciences, Pennsylvania State University, State College, Pennsylvania, USA.,Department of Biology and Institute of Neurobiology, University of Puerto Rico, San Juan, Puerto Rico
| | - Tugrul Giray
- Department of Biology and Institute of Neurobiology, University of Puerto Rico, San Juan, Puerto Rico
| | - Christina M Grozinger
- Department of Entomology, Center for Pollinator Research, Huck Institutes of the Life Sciences, Pennsylvania State University, State College, Pennsylvania, USA
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Sato D, Yamahama Y, Koyama R, Mase K, Sawada H. Molecular Characterization and Tissue Distribution of Calcineurin Regulatory B Subunit during the Prevention of Diapause in the Silkworm, Bombyx mori. Zoolog Sci 2021; 38:305-310. [PMID: 34342950 DOI: 10.2108/zs200147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 03/16/2021] [Indexed: 11/17/2022]
Abstract
To clarify the molecular mechanism of prevention of entry into diapause in Bombyx mori by HCl treatment, we biochemically analyzed calcineurin regulatory B subunit (CNB) in diapause eggs treated with HCl solution. Our previous studies revealed that HCl treatment causes Ca2+ to efflux from diapause eggs. Therefore, we attempted to analyze CNB, which is known to associate with Ca2+. The gene expression level of CNB was increased by HCl treatment and the changes of the gene expression were almost the same as that in the non-diapause eggs. As for diapause eggs, almost no gene expression of CNB was confirmed except just after oviposition. In the assay for phosphorylation by protein kinase CK2, recombinant CNB (rCNB) was phosphorylated in vitro. Additionally, a Ca2+ binding assay indicated that rCNB shows affinity for Ca2+. The distribution of CNB was investigated with an immunohistochemical technique using antiserum against rCNB in diapause eggs and HCl-treated diapause eggs. CNB was localized in serosa cells and yolk cells in both eggs. These data may suggest that CNB is activated by intracellular Ca2+ or efflux Ca2+ resulting from HCl treatment, and that it plays a role in the molecular mechanisms of artificial diapause prevention or the breaking of diapause in the silkworm.
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Affiliation(s)
- Daigo Sato
- Department of Biosciences, College of Humanities and Sciences, Nihon University, Setagaya-ku, Tokyo 156-8550, Japan
| | - Yumi Yamahama
- Department of Biology, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
| | - Rimi Koyama
- Department of Biosciences, College of Humanities and Sciences, Nihon University, Setagaya-ku, Tokyo 156-8550, Japan
| | - Keisuke Mase
- Department of Biosciences, College of Humanities and Sciences, Nihon University, Setagaya-ku, Tokyo 156-8550, Japan
| | - Hiroshi Sawada
- Department of Biosciences, College of Humanities and Sciences, Nihon University, Setagaya-ku, Tokyo 156-8550, Japan,
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Kitta R, Yamahama Y, Yamamoto T, Mase K, Sawada H. Molecular Characterization and Tissue Distribution of Mitochondrial Ca2+-Dependent Solute Carrier Protein during Prevention of Diapause by HCl Treatment in the Silkworm,Bombyx mori. Zoolog Sci 2018; 35:487-493. [DOI: 10.2108/zs180041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Ryo Kitta
- Department of Biosciences, College of Humanities and Sciences, Nihon University, Sakurajosui 3-25-40, Setagaya-ku, Tokyo 156-8550, Japan
| | - Yumi Yamahama
- Department of Biology, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan
| | - Takayuki Yamamoto
- Division of Biology, College of Liberal Arts and Sciences, Kitasato University, Sagamihara, Kanagawa 228-8555, Japan
| | - Keisuke Mase
- Department of Biosciences, College of Humanities and Sciences, Nihon University, Sakurajosui 3-25-40, Setagaya-ku, Tokyo 156-8550, Japan
| | - Hiroshi Sawada
- Department of Biosciences, College of Humanities and Sciences, Nihon University, Sakurajosui 3-25-40, Setagaya-ku, Tokyo 156-8550, Japan
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Kitta R, Kuwamoto M, Yamahama Y, Mase K, Sawada H. Nitric oxide synthase during early embryonic development in silkworm Bombyx mori: Gene expression, enzyme activity, and tissue distribution. Dev Growth Differ 2016; 58:750-756. [PMID: 27896806 DOI: 10.1111/dgd.12331] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 10/25/2016] [Accepted: 11/06/2016] [Indexed: 11/28/2022]
Abstract
To elucidate the mechanism for embryonic diapause or the breakdown of diapause in Bombyx mori, we biochemically analyzed nitric oxide synthase (NOS) during the embryogenesis of B. mori. The gene expression and enzyme activity of B. mori NOS (BmNOS) were examined in diapause, non-diapause, and HCl-treated diapause eggs. In the case of HCl-treated diapause eggs, the gene expression and enzyme activity of BmNOS were induced by HCl treatment. However, in the case of diapause and non-diapause eggs during embryogenesis, changes in the BmNOS activity and gene expressions did not coincide except 48-60 h after oviposition in diapause eggs. The results imply that changes in BmNOS activity during the embryogenesis of diapause and non-diapause eggs are regulated not only at the level of transcription but also post-transcription. The distribution and localization of BmNOS were also investigated with an immunohistochemical technique using antibodies against the universal NOS; the localization of BmNOS was observed mainly in the cytoplasm of yolk cells in diapause eggs and HCl-treated diapause eggs. These data suggest that BmNOS has an important role in the early embryonic development of the B. mori.
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Affiliation(s)
- Ryo Kitta
- Department of Biosciences, College of Humanities and Sciences, Nihon University, Setagaya-ku, Tokyo, 156-8550, Japan
| | - Marina Kuwamoto
- Department of Chemistry, College of Humanities and Sciences, Nihon University, Setagaya-ku, Tokyo, 156-8550, Japan
| | - Yumi Yamahama
- Department of Biology, Hamamatsu University School of Medicine, Hamamatsu, 431-3192, Japan
| | - Keisuke Mase
- Department of Biosciences, College of Humanities and Sciences, Nihon University, Setagaya-ku, Tokyo, 156-8550, Japan
| | - Hiroshi Sawada
- Department of Biosciences, College of Humanities and Sciences, Nihon University, Setagaya-ku, Tokyo, 156-8550, Japan
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Kitta R, Okawa SI, Saito M, Mase K, Sawada H. HCl Treatment for Preventing Diapause Causes Ca2+ Efflux in Bombyx mori Eggs. Zoolog Sci 2015; 32:124-8. [PMID: 25826059 DOI: 10.2108/zs140168] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
To elucidate the mechanism for preventing entry into embryonic diapause or breakdown of diapause in Bombyx mori by HCl and dimethyl sulfoxide (DMSO) treatment or a combination of cold and HCl treatment, we performed quantitative analysis of Ca2+ and Mg2+ in the chorion and egg content using inductively coupled plasma atomic emission spectrometry (ICP-AES). When diapause eggs that had been incubated at 25°C for 2 days from oviposition and at 4°C for an additional six days were treated with HCl solution, the amount of Ca2+ in the chorion and egg content after HCl treatment was reduced to one-seventh, as compared with the amount before treatment. In contrast, there was no change in the amount of Mg2+ with HCl treatment. The amount of Ca2+ in the HCl solution after the diapause eggs were treated increased 7.5-fold, as compared with that of eggs treated with water. Even when 17-day-old diapausing eggs were treated with HCl, which did not break diapause, the amount of Ca2+ in the chorion and egg content was reduced to one-fifth, as compared with the control. Meanwhile, changes in Ca2+ and Mg2+ contents were not observed in 12-hr-old diapause-destined eggs before or after treatment with DMSO, which effectively prevents diapause. These data may suggest that Ca2+ efflux from diapause eggs by HCl is not directly associated with preventing entry into diapause or breaking of diapause. In addition, we discovered that the amount of Ca2+ in diapause-destined eggs was more than 2.4-fold larger than in non-diapause-destined eggs.
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Affiliation(s)
- Ryo Kitta
- 1 Depertment of Correlative Study of Physics and Chemistry, Graduate School of Integrated Basic Sciences, Nihon University, Setagaya-ku, Tokyo 156-8550, Japan
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Yamamoto T, Mase K, Sawada H. Diapause prevention effect of Bombyx mori by dimethyl sulfoxide. PLoS One 2013; 8:e64124. [PMID: 23675522 PMCID: PMC3652847 DOI: 10.1371/journal.pone.0064124] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Accepted: 04/10/2013] [Indexed: 01/04/2023] Open
Abstract
HCl treatment has been, for about 80 years, the primary method for the prevention of entry into embryonic diapauses of Bombyx mori. This is because no method is as effective as the HCl treatment. In this study, we discovered that dimethyl sulfoxide (DMSO) prevented entry into the diapause of the silkworm, Bombyx mori. The effect of diapause prevention was 78% as a result of treatment with 100% DMSO concentration, and the effect was comparable to that of the HCl treatment. In contrast, in the case of non-diapause eggs, hatchability was decreased by DMSO in a concentration-dependent manner. The effect of DMSO was restricted within 24 hours after oviposition of diapause eggs, and the critical period was slightly shorter than the effective period of the HCl treatment. DMSO analogs, such as dimethyl formamide (DMF) and dimethyl sulfide (DMS), did little preventive effect against the diapause. Furthermore, we also investigated the permeation effects of chemical compounds by DMSO. When treated with an inhibitor of protein kinase CK2 (CK2) dissolved in DMSO, the prevention rate of the diapause was less than 40%. This means that the inhibition effect by the CK2 inhibitor was the inhibition of embryonic development after diapause prevention by DMSO. These data suggest that DMSO has the effects of preventing from entering into the diapause and permeation of chemicals into diapause eggs.
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Affiliation(s)
- Takayuki Yamamoto
- Division of Biology, College of Liberal Arts and Sciences, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Keisuke Mase
- College of Humanities and Sciences, Nihon University, Setagaya-ku, Tokyo, Japan
| | - Hiroshi Sawada
- College of Humanities and Sciences, Nihon University, Setagaya-ku, Tokyo, Japan
- * E-mail:
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