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Tang X, Liu H, Chang L, Wang X, Liu Q, Tang Z, Xia Q, Zhao P. A strategy for improving silk yield and organ size in silk-producing insects. FEBS J 2024. [PMID: 38923388 DOI: 10.1111/febs.17193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 04/24/2024] [Accepted: 05/22/2024] [Indexed: 06/28/2024]
Abstract
Insect silks possess excellent biodegradability, biocompatibility and mechanical properties, and have numerous applications in biomedicine and tissue engineering. However, the application of silk fiber is hindered by its limited supply, especially from non-domesticated insects. In the present study, the silk yield and organ size of Bombyx mori were significantly improved through genetic manipulation of the target of rapamycin complex 1 (TORC1) pathway components. Silk protein synthesis and silk gland size were decreased following rapamycin treatment, inhibiting the TORC1 signaling pathway both in vivo and ex vivo. The overexpression of posterior silk gland-specific Rheb and BmSLC7A5 improved silk protein synthesis and silk gland size by activating the TORC1 signaling pathway. Silk yield in BmSLC7A5-overexpression silkworms was significantly increased by approximately 25%. We have demonstrated that the TORC1 signaling pathway is involved in the transcription and translation of silk genes and transcriptional activators via phosphorylation of p70 S6 kinase 1 and 4E-binding protein 1. Our findings present a strategy for increasing silk yield and organ size in silk-producing insects.
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Affiliation(s)
- Xin Tang
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Biological Science Research Center, Southwest University, Chongqing, China
- Chongqing Key Laboratory of the Innovative Chinese Materia Medica & Health Intervention, Chongqing Academy of Chinese Materia Medica, China
| | - Huawei Liu
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Biological Science Research Center, Southwest University, Chongqing, China
- Key Laboratory for Germplasm Creation in Upper Reaches of the Yangtze River, Ministry of Agriculture and Rural Affairs, Chongqing, China
| | - Li Chang
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Biological Science Research Center, Southwest University, Chongqing, China
- Institute for Brain Science and Disease, Chongqing Medical University, China
| | - Xin Wang
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Biological Science Research Center, Southwest University, Chongqing, China
- Key Laboratory for Germplasm Creation in Upper Reaches of the Yangtze River, Ministry of Agriculture and Rural Affairs, Chongqing, China
| | - Qingsong Liu
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Biological Science Research Center, Southwest University, Chongqing, China
- Key Laboratory for Germplasm Creation in Upper Reaches of the Yangtze River, Ministry of Agriculture and Rural Affairs, Chongqing, China
| | - Zhangchen Tang
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Biological Science Research Center, Southwest University, Chongqing, China
- Key Laboratory for Germplasm Creation in Upper Reaches of the Yangtze River, Ministry of Agriculture and Rural Affairs, Chongqing, China
| | - Qingyou Xia
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Biological Science Research Center, Southwest University, Chongqing, China
- Key Laboratory for Germplasm Creation in Upper Reaches of the Yangtze River, Ministry of Agriculture and Rural Affairs, Chongqing, China
| | - Ping Zhao
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Biological Science Research Center, Southwest University, Chongqing, China
- Key Laboratory for Germplasm Creation in Upper Reaches of the Yangtze River, Ministry of Agriculture and Rural Affairs, Chongqing, China
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2
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Zeng Z, Tong X, Yang Y, Zhang Y, Deng S, Zhang G, Dai F. Pediococcus pentosaceus ZZ61 enhances growth performance and pathogenic resistance of silkworm Bombyx mori by regulating gut microbiota and metabolites. BIORESOURCE TECHNOLOGY 2024; 402:130821. [PMID: 38735341 DOI: 10.1016/j.biortech.2024.130821] [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: 03/20/2024] [Revised: 05/05/2024] [Accepted: 05/08/2024] [Indexed: 05/14/2024]
Abstract
Probiotics have attracted considerable attention in animal husbandry due to their positive effect on animal growth and health. This study aimed to screen candidate probiotic strain promoting the growth and health of silkworm and reveal the potential mechanisms. A novel probiotic Pediococcus pentosaceus strain (ZZ61) substantially promoted body weight gain, feed efficiency, and silk yield. These effects were likely mediated by changes in the intestinal digestive enzyme activity and nutrient provisioning (e.g., B vitamins) of the host, improving nutrient digestion and assimilation. Additionally, P. pentosaceus produced antimicrobial compounds and increased the antioxidant capacity to protect the host against pathogenic infection. Furthermore, P. pentosaceus affected the gut microbiome and altered the levels of gut metabolites (e.g., glycine and glycerophospholipids), which in turn promotes host nutrition and health. This study contributes to an improved understanding of the interactions between probiotic and host and promotes probiotic utilization in sericulture.
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Affiliation(s)
- Zhu Zeng
- State Key Laboratory of Resource Insects, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China.
| | - Xiaoling Tong
- State Key Laboratory of Resource Insects, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China.
| | - Yi Yang
- State Key Laboratory of Resource Insects, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China.
| | - Yuli Zhang
- Guangxi Key Laboratory of Sericultural Genetic Improvement and Efficient Breeding, Guangxi Zhuang Autonomous Region, Nanning 530007, China.
| | - Shuwen Deng
- State Key Laboratory of Resource Insects, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China.
| | - Guizheng Zhang
- Guangxi Key Laboratory of Sericultural Genetic Improvement and Efficient Breeding, Guangxi Zhuang Autonomous Region, Nanning 530007, China.
| | - Fangyin Dai
- State Key Laboratory of Resource Insects, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China.
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3
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Wu J, Li L, Qin D, Chen H, Liu Y, Shen G, Zhao P. Silkworm Hemolymph and Cocoon Metabolomics Reveals Valine Improves Feed Efficiency of Silkworm Artificial Diet. INSECTS 2024; 15:291. [PMID: 38667421 PMCID: PMC11050563 DOI: 10.3390/insects15040291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 04/12/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024]
Abstract
Artificial silkworm diets significantly impact farm profitability. Sustainable cocoon production depends on the continuous improvement of feed efficiency to reduce costs and nutrient losses in the feed. This study used metabolomics to explore the differences in silkworm cocoons and hemolymph under two modes of rearing: an artificial diet and a mulberry-leaf diet. Nine metabolites of silkworm cocoons and hemolymph in the mulberry-leaf group were higher than those in the artificial-diet group. Enrichment analysis of the KEGG pathways for these metabolites revealed that they were mainly enriched in the valine, leucine, and isoleucine biosynthesis and degradation pathways. Hence, the artificial silkworm diet was supplemented various concentrations of valine were supplemented to with the aim of examining the impact of valine on their feeding and digestion of the artificial diet. The results indicated that valine addition had no significant effect on feed digestibility in the fifth-instar silkworm. Food intake in the 2% and 4% valine groups was significantly lower than that in the 0% valine group. However, the 2% and 4% valine groups showed significantly improved cocoon-production efficiency, at 11.3% and 25.1% higher, respectively. However, the cocoon-layer-production efficiencies of the 2% and 4% valine groups decreased by 7.7% and 13.9%, respectively. The research confirmed that valine is an effective substance for enhancing the feed efficiency of silkworms.
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Affiliation(s)
- Jinxin Wu
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China
| | - Lingyi Li
- Westa College, Southwest University, Chongqing 400715, China
| | - Daoyuan Qin
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China
| | - Han Chen
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China
| | - Yuanlin Liu
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China
| | - Guanwang Shen
- Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, 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
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4
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Li J, Deng J, Deng X, Liu L, Zha X. Metabonomic Analysis of Silkworm Midgut Reveals Differences between the Physiological Effects of an Artificial and Mulberry Leaf Diet. INSECTS 2023; 14:347. [PMID: 37103160 PMCID: PMC10146990 DOI: 10.3390/insects14040347] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/27/2023] [Accepted: 03/29/2023] [Indexed: 06/19/2023]
Abstract
Bombyx mori is a model lepidopteran insect of great economic value. Mulberry leaves are its only natural food source. The development of artificial diets can not only resolve the seasonal shortage of mulberry leaves but also enable changes to be made to the feed composition according to need. Metabolomic differences between the midguts of male and female silkworms fed either on fresh mulberry leaves or an artificial diet were studied using liquid chromatography-mass spectrography (LC-MS/MS) analysis. A total of 758 differential metabolites were identified. Our analysis showed that they were mainly involved in disease resistance and immunity, silk quality, and silkworm growth and development. These experimental results provide insights into the formulation of optimized artificial feed for silkworms.
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Affiliation(s)
- Juan Li
- State Key Laboratory of Silkworm Genome Biology, Institute of Sericulture and Systems Biology, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China
- School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Jing Deng
- State Key Laboratory of Silkworm Genome Biology, Institute of Sericulture and Systems Biology, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China
| | - Xuan Deng
- State Key Laboratory of Silkworm Genome Biology, Institute of Sericulture and Systems Biology, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China
| | - Lianlian Liu
- State Key Laboratory of Silkworm Genome Biology, Institute of Sericulture and Systems Biology, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China
| | - Xingfu Zha
- State Key Laboratory of Silkworm Genome Biology, Institute of Sericulture and Systems Biology, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China
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5
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Combined analysis of silk synthesis and hemolymph amino acid metabolism reveal key roles for glycine in increasing silkworm silk yields. Int J Biol Macromol 2022; 209:1760-1770. [PMID: 35490768 DOI: 10.1016/j.ijbiomac.2022.04.143] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 04/08/2022] [Accepted: 04/19/2022] [Indexed: 11/20/2022]
Abstract
Rearing silkworms (Bombyx mori) using formula feed has revolutionized traditional mulberry feed strategies. However, low silk production efficiencies persist and have caused bottlenecks, hindering the industrial application of formula feed sericulture. Here, we investigated the effects of formula feed amino acid composition on silk yields. We showed that imbalanced amino acids reduced DNA proliferation, decreased Fib-H, Fib-L, and P25 gene expression, and caused mild autophagy in the posterior silk gland, reducing cocoon shell weight and ratio. When compared with mulberry leaves, Gly, Ala, Ser, and Tyr percentages of total amino acids in formula feed were decreased by 5.26%, while Glu and Arg percentages increased by 9.56%. These changes increased uric acid and several amino acids levels in the hemolymph of silkworms on formula feed. Further analyses showed that Gly and Thr (important synthetic Gly sources) increased silk yields, with Gly increasing amino acid conversion efficiencies to silk protein, and reducing urea levels in hemolymph. Also, Gly promoted endomitotic DNA synthesis in silk gland cells via phosphoinositide 3-kinase (PI3K)/Akt/target of rapamycin (TOR) signaling. In this study, we highlighted the important role of Gly in regulating silk yields in silkworms.
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6
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Tao S, Wang J, Liu M, Sun F, Li B, Ye C. Haemolymph metabolomic differences in silkworms (Bombyx mori L.) under mulberry leaf and two artificial diet rearing methods. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2022; 109:e21851. [PMID: 34877697 DOI: 10.1002/arch.21851] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/02/2021] [Accepted: 10/05/2021] [Indexed: 06/13/2023]
Abstract
The new technology of silkworm (Bombyx mori L.) artificial feed breeding has many characteristics and advantages. This study assessed silkworm rearing with mulberry leaf at all instars (MF) as the control, and used metabolomics to explore the differences in haemolymph metabolism of fifth instar silkworms under two modes of rearing with an artificial diet at all instars (AF) and rearing with an artificial diet during first to third instars and mulberry leaf during the fourth and fifth instars (AMF). The results show that, compared with silkworms of the MF group, the amount and fold change of various metabolites were higher in the haemolymph of AF group silkworms, and the metabolism of amino acids and uric acid, carbohydrates, lipids, and vitamins were changed. These changes may be the reasons for the poor performance of the AF silkworms. However, the amount and fold change of the various metabolites of silkworms in the AMF group were lower, and some metabolic pathways were more active. The amount of material and energy supply were greater. These changes could explain the high efficiency growth of body weight of silkworms after the conversion from artificial diet rearing to mulberry leaf rearing. These findings provide an important theoretical basis for the optimisation of artificial diet rearing technology for silkworms.
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Affiliation(s)
- Shanshan Tao
- Institute of Sericulture, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Jie Wang
- School of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Minghui Liu
- Institute of Sericulture, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Fan Sun
- Institute of Sericulture, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Bing Li
- Institute of Sericulture, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Chongjun Ye
- Institute of Sericulture, Anhui Academy of Agricultural Sciences, Hefei, China
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7
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Xing D, Liao S, Huang W, Li Q, Xiao Y, Yan S, Zhao C, Yang Q. Mechanism of carbendazim in treating pebrine disease of Bombyx mori based on GC/MS-based metabonomics. Parasitol Res 2022; 121:453-460. [PMID: 34993633 DOI: 10.1007/s00436-021-07394-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 11/22/2021] [Indexed: 11/28/2022]
Abstract
Pebrine disease is caused by microporidia (Nosema bombycis) and is destructive to sericulture production. A carbendazim-based drug FangWeiLing (FWL) has a significant control effect on the disease, which is a successful example of drug treatment of microsporidia. In this study, the therapeutic effect and critical action time of FWL were investigated by silkworm rearing biological test. Besides, the hemolymph samples from silkworms in the control group, model group, and FWL group were analyzed by metabonomics based on gas chromatography-mass spectrometry (GC/MS). The results showed that FWL had a significant therapeutic effect on pebrine disease, and the critical action time was 24 ~ 48 h post inoculation. Forty-seven different metabolites related to pebrine disease were screened out, and correlated with starch and sucrose metabolism; aminoacyl-tRNA biosynthesis; arginine biosynthesis; glycine, serine, and threonine metabolism; and phenylalanine, tyrosine, and tryptophan biosynthesis. After pretreatment with FWL, the metabolites were all effectively regulated, indicating productive intervention. Principal component analysis (PCA) also showed that the overall metabolic profile of the FWL group tended toward the control group. Compared with the control group, 16 different metabolites were obtained from the hemolymph of B.mori in FWL group, mainly involving aminoacyl-tRNA biosynthesis and taurine and hypotaurine metabolism. It indicated that FWL had some effect on silkworm metabolism, which might be related to the decrease in cocoon quality. In conclusion, combined with the life cycle of N. bombycis, the mechanism of carbendazim in the treatment of pebrine disease can be fully revealed. Carbendazim can effectively reduce the destruction of amino acid metabolism and carbohydrate metabolism by N. Bombycis infection by inhibiting the proliferation of the meronts in silkworms, thus maintaining the normal physiological state of B. mori and achieve therapeutic effects. GC/MS-based metabonomics is a valuable and promising strategy to understand the disease mechanism and drug treatment of pebrine disease.
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Affiliation(s)
- Dongxu Xing
- Sericulture and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, No. 133 Dongguanzhuang Yiheng Road, Guangzhou, 510610, China
| | - Sentai Liao
- Sericulture and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, No. 133 Dongguanzhuang Yiheng Road, Guangzhou, 510610, China
| | - Wenjie Huang
- Agro-Biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Qingrong Li
- Sericulture and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, No. 133 Dongguanzhuang Yiheng Road, Guangzhou, 510610, China
| | - Yang Xiao
- Sericulture and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, No. 133 Dongguanzhuang Yiheng Road, Guangzhou, 510610, China
| | - Shijuan Yan
- Agro-Biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Chaoyi Zhao
- Sericulture and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, No. 133 Dongguanzhuang Yiheng Road, Guangzhou, 510610, China
| | - Qiong Yang
- Sericulture and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, No. 133 Dongguanzhuang Yiheng Road, Guangzhou, 510610, China.
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8
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Qin D, Wang G, Dong Z, Xia Q, Zhao P. Comparative Fecal Metabolomes of Silkworms Being Fed Mulberry Leaf and Artificial Diet. INSECTS 2020; 11:E851. [PMID: 33266201 PMCID: PMC7759890 DOI: 10.3390/insects11120851] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 11/19/2020] [Accepted: 11/25/2020] [Indexed: 02/03/2023]
Abstract
Metabonomics accurately monitors the precise metabolic responses to various dietary patterns. Metabolic profiling allows simultaneous measurement of various fecal metabolites whose concentrations may be affected by food intake. In this study, we analyzed the fecal metabolomes of silkworm (Bombyx mori) larvae reared on fresh mulberry leaves and artificial diets. 57 differentially expressed metabolites were identified by gas chromatography-mass spectrometry. Of these, 39 were up-regulated and 18 were downregulated in the mulberry leaf meal group. Most of the amino acids, carbohydrates and lipids associated with physical development and silk protein biosynthesis were enriched in silkworms reared on mulberry leaves. In contrast, the urea, citric acid, D-pinitol, D-(+)-cellobiose and N-acetyl glucosamine levels were relatively higher in the silkworm feeding on the artificial diets. The findings of this study help clarify the association between diet and metabolic profiling.
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Affiliation(s)
- DaoYuan Qin
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China; (D.Q.); (G.W.); (Z.D.); (Q.X.)
- Biological Science Research Center, Southwest University, Chongqing 400715, China
- Chongqing Key Laboratory of Sericultural Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing 400715, China
| | - GenHong Wang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China; (D.Q.); (G.W.); (Z.D.); (Q.X.)
- Biological Science Research Center, Southwest University, Chongqing 400715, China
- Chongqing Key Laboratory of Sericultural Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing 400715, China
| | - ZhaoMing Dong
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China; (D.Q.); (G.W.); (Z.D.); (Q.X.)
- Biological Science Research Center, Southwest University, Chongqing 400715, China
- Chongqing Key Laboratory of Sericultural Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing 400715, China
| | - QingYou Xia
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China; (D.Q.); (G.W.); (Z.D.); (Q.X.)
- Biological Science Research Center, Southwest University, Chongqing 400715, China
- Chongqing Key Laboratory of Sericultural Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing 400715, China
| | - Ping Zhao
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China; (D.Q.); (G.W.); (Z.D.); (Q.X.)
- Biological Science Research Center, Southwest University, Chongqing 400715, China
- Chongqing Key Laboratory of Sericultural Science, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing 400715, China
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9
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Tang X, Liu H, Shi Z, Chen Q, Kang X, Wang Y, Zhao P. Enhanced silk yield in transgenic silkworm (Bombyx mori) via ectopic expression of BmGT1-L in the posterior silk gland. INSECT MOLECULAR BIOLOGY 2020; 29:452-465. [PMID: 32654295 DOI: 10.1111/imb.12655] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 03/11/2020] [Accepted: 06/30/2020] [Indexed: 06/11/2023]
Abstract
The silkworm is an economically important insect producing plentiful silk fibre in the silk gland. In this study, we reported a cross-talk between the fat body, silk gland and midgut through a glycine-serine biosynthetic pathway in the silkworm. Amino acid sequence and functional domains of glycine transporter gene BmGT1-L were mapped. Our results indicated that BmGT1-L was specifically expressed in the midgut microvilli and persistently expressed during the feeding stages. RNA interference of BmGT1-L activated glycine biosynthesis, and BmGT1-L overexpression facilitated serine biosynthesis in the BmN4-SID1 cell. In addition, silkworms after FibH gene knock-out or silk gland extirpation showed markedly decreased BmGT1-L transcripts in the midgut and disturbed glycine-serine biosynthesis as silk yield decreased. Finally, BmGT1-L ectopic expression in the posterior silk gland promoted glycine biosynthesis, and enhanced silk yield via increasing fibroin synthesis. These results suggested that cross-talk between tissues can be used for enhancing silk yield in the silkworm.
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Affiliation(s)
- X Tang
- Biological Science Research Center, Southwest University, Chongqing, China
| | - H Liu
- Biological Science Research Center, Southwest University, Chongqing, China
| | - Z Shi
- Biological Science Research Center, Southwest University, Chongqing, China
| | - Q Chen
- Department of Biochemistry and Molecular Biology, Chongqing Medical University, Chongqing, China
| | - X Kang
- College of Biotechnology, Southwest University, Chongqing, China
| | - Y Wang
- College of Biotechnology, Southwest University, Chongqing, China
| | - P Zhao
- Biological Science Research Center, Southwest University, Chongqing, China
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10
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Cao YY, Peng LL, Jiang L, Thakur K, Hu F, Tang SM, Wei ZJ. Evaluation of the Metabolic Effects of Hydrogen Sulfide on the Development of Bombyx mori (Lepidoptera: Bombycidae), Using Liquid Chromatography-Mass Spectrometry-Based Metabolomics. JOURNAL OF INSECT SCIENCE (ONLINE) 2020; 20:5805372. [PMID: 32186739 PMCID: PMC7071785 DOI: 10.1093/jisesa/ieaa008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Indexed: 05/10/2023]
Abstract
Hydrogen sulfide (H2S) is a highly poisonous gas with an unpleasant smell of rotten eggs. Previous studies of H2S have primarily focused on its effects on mammalian nervous and respiratory systems. In this study, silkworm developmental parameters and changes in metabolites in response to H2S exposure were investigated using a hemolymph metabolomic approach, based on liquid chromatography-mass spectrometry (LC-MS). The developmental parameters, body weight, cocoon weight, cocoon shell weight, and cocoon shell ratio, were noticeably increased following H2S exposure, with the greatest effects observed at 7.5-μM H2S. Metabolites upregulated under H2S exposure (7.5 μM) were related to inflammation, and included (6Z, 9Z, 12Z)-octadecatrienoic acid, choline phosphate, and malic acid, while hexadecanoic acid was downregulated. Identified metabolites were involved in biological processes, including pyrimidine, purine, and fatty acid metabolism, which are likely to affect silk gland function. These results demonstrate that H2S is beneficial to silkworm development and alters metabolic pathways related to spinning function and inflammation. The present study provides new information regarding the potential functions of H2S in insects and metabolic pathways related to this phenomenon.
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Affiliation(s)
- Yu-Yao Cao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, PR China
| | - Li-Li Peng
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, PR China
| | - Li Jiang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, PR China
| | - Kiran Thakur
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, PR China
| | - Fei Hu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, PR China
| | - Shun-Ming Tang
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, PR China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, PR China
| | - Zhao-Jun Wei
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, PR China
- Corresponding author, e-mail:
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11
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Haque MR, Hirowatari A, Saruta F, Furuya S, Yamamoto K. Molecular survey of the phosphoserine phosphatase involved in L-serine synthesis by silkworms (Bombyx mori). INSECT MOLECULAR BIOLOGY 2020; 29:48-55. [PMID: 31294881 DOI: 10.1111/imb.12609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 06/16/2019] [Accepted: 07/04/2019] [Indexed: 06/09/2023]
Abstract
Phosphoserine phosphatase (PSP) catalyses the synthesis of l-serine via the phosphorylated pathway by facilitating the dephosphorylation of phosphoserine. A cDNA encoding PSP from the silkworm Bombyx mori (bmPSP) was isolated using reverse transcription-PCR and then sequenced. The resulting clone encoded 236 amino acids with a molecular weight of 26 150, exhibiting 14-60% sequence identity with other PSPs. The recombinant PSP was overexpressed in Escherichia coli and purified. Kinetic studies showed that bmPSP possessed activity toward l-phosphoserine, and Asp20, Asp22 and Asp204 in bmPSP were found to be critical for modulating bmPSP activity. Real-time PCR analysis provided evidence that the amount of bmpsp transcript was reduced in middle silk glands of a sericin-deficient silkworm strain. These findings revealed that bmPSP may play important roles in synthesizing one-carbon donors of l-serine, which is abundant in silk, as well as other cell metabolites in B. mori.
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Affiliation(s)
- M R Haque
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University Graduate School, Fukuoka, Japan
| | - A Hirowatari
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University Graduate School, Fukuoka, Japan
| | - F Saruta
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University Graduate School, Fukuoka, Japan
| | - S Furuya
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University Graduate School, Fukuoka, Japan
| | - K Yamamoto
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University Graduate School, Fukuoka, Japan
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12
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Li G, Zhang X, Qian H, Liu M, Zhao G, Xu A. Gas Chromatography-Mass Spectrometry Based Midgut Metabolomics Reveals the Metabolic Perturbations under NaF Stress in Bombyx mori. INSECTS 2019; 11:insects11010017. [PMID: 31878123 PMCID: PMC7023488 DOI: 10.3390/insects11010017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 12/16/2019] [Accepted: 12/20/2019] [Indexed: 02/01/2023]
Abstract
Fluoride tolerance is an important economic trait in sericulture, especially in some industrial development regions. Analyses of physiological changes involving structural damage to the insect body and molecular analyses of some related genes have focused on this area; however, the changes that occur at the metabolic level of silkworms after eating fluoride-contaminated mulberry leaves remain unclear. Here, metabonomic analysis was conducted using gas chromatography-mass spectrometry (GC-MS) to analyze the changes in midgut tissue after NaF stress using silkworm strains 733xin (susceptible stain) and T6 (strain resistant to fluoride), which were previously reported by our laboratory. Differential metabolomics analysis showed that both T6 and 733xin strains displayed complex responses after exposure to 200 mg/kg NaF. The purine metabolism and arginine and proline metabolic pathways of fluoride-tolerant strains reached significant levels, among which 3′-adenylic acid and hypoxanthine were significantly upregulated, whereas guanine, allantoic acid, xanthine, N-acetyl-L-glutamic acid, and pyruvate were significantly downregulated. These metabolic pathways may be related to the fluoride tolerance mechanism of NaF poisoning and tolerant strains.
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Affiliation(s)
- Gang Li
- The Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang 212003, China
- The key Laboratory of silkworm and mulberry genetic improvement, Ministry of Agriculture, Chinese Academy of Agricultural Science, Zhenjiang 212018, China
- Correspondence: (G.L.); (A.X.)
| | - Xiao Zhang
- The Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Heying Qian
- The Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang 212003, China
- The key Laboratory of silkworm and mulberry genetic improvement, Ministry of Agriculture, Chinese Academy of Agricultural Science, Zhenjiang 212018, China
| | - Mingzhu Liu
- The key Laboratory of silkworm and mulberry genetic improvement, Ministry of Agriculture, Chinese Academy of Agricultural Science, Zhenjiang 212018, China
| | - Guodong Zhao
- The Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang 212003, China
- The key Laboratory of silkworm and mulberry genetic improvement, Ministry of Agriculture, Chinese Academy of Agricultural Science, Zhenjiang 212018, China
| | - Anying Xu
- The Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang 212003, China
- The key Laboratory of silkworm and mulberry genetic improvement, Ministry of Agriculture, Chinese Academy of Agricultural Science, Zhenjiang 212018, China
- Correspondence: (G.L.); (A.X.)
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13
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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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Haque MR, Hirowatari A, Koyanagi A, Ichinose T, Abiru M, Mohri S, Furuya S, Yamamoto K. Molecular characterization and expression analysis of a phosphoserine aminotransferase involving l-serine synthesis from silkworm, Bombyx mori. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2019; 101:e21553. [PMID: 31004387 DOI: 10.1002/arch.21553] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 03/12/2019] [Accepted: 03/29/2019] [Indexed: 06/09/2023]
Abstract
In this study, we identified and characterized a phosphoserine aminotransferase (bmPSAT) from Bombyx mori (B. mori) that is responsible for l-serine biosynthesis. A complementary DNA that encodes bmPSAT was cloned by reverse transcriptase polymerase reaction and sequenced. The presumed amino acid sequence revealed 47-87% identity with known PSATs from insects, humans, plants, and bacteria. Through phylogenetic analysis, we found that bmPSAT is evolutionary related to insect PSATs. Recombinant bmPSAT was produced in Escherichia coli by using a cold-shock promotor and purified to homogeneity. This enzyme utilizes phosphohydroxypyruvate and glutamate for transamination. bmPSAT messenger RNA (mRNA) was expressed at higher levels in several tissues of standard strain silkworm including the silk gland, whereas a sericin-deficient silkworm strain exhibited a diminished expression of bmPSAT mRNA in the silk gland. These findings indicate that bmPSAT may play an important role in synthesizing and supplying l-serine in the larva of B. mori.
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Affiliation(s)
- Mohammad R Haque
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - Aiko Hirowatari
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - Ayumi Koyanagi
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - Takashi Ichinose
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - Maiko Abiru
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - Shinya Mohri
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - Shigeki Furuya
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - Kohji Yamamoto
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
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Wang X, Li Y, Liu Q, Tan X, Xie X, Xia Q, Zhao P. GC/MS-based metabolomics analysis reveals active fatty acids biosynthesis in the Filippi's gland of the silkworm, Bombyx mori, during silk spinning. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2019; 105:1-9. [PMID: 30576753 DOI: 10.1016/j.ibmb.2018.12.009] [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: 07/19/2018] [Revised: 12/14/2018] [Accepted: 12/16/2018] [Indexed: 05/12/2023]
Abstract
The Filippi's gland, also called the Lyonet's gland, is in truth a pair of tiny glands that are unique to lepidopteran insects. Although the ultrastructure of the Filippi's gland has been well-understood, the specific biological function of this gland in silk spinning is still unclear. Previous studies proposed a hypothesis that this gland might synthesize and secrete some substances into the anterior silk gland (ASG) to help silk spinning. In order to identify these metabolites, a GC/MS-based metabolomics technique was introduced. A total of 59 metabolites, including fatty acids, amino acids, and sugars, were identified in glands from silkworm larvae in the feeding and silk spinning stages. Abundance and pathway analyses revealed that these metabolites had different abundances during gland development and silk spinning, which may facilitate the transport of small molecules and ions. The most interesting result is that the Filippi's gland has a very active fatty acid biosynthesis process during spinning, suggesting that it may synthesize lipids or waxes and secrete them into the ASG to promote silk spinning. This data provides instructive insight into the biological functions of Filippi's gland from both silkworms and other lepidoptera.
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Affiliation(s)
- Xin Wang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China; Key Laboratory of Sericultural Science of Chongqing, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, 400715, PR China
| | - Yi Li
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China
| | - Qingsong Liu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China
| | - Xiaoyin Tan
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China
| | - Xiaoqian Xie
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China
| | - Qingyou Xia
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China; Key Laboratory of Sericultural Science of Chongqing, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, 400715, PR China
| | - Ping Zhao
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, PR China; Key Laboratory of Sericultural Science of Chongqing, Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, 400715, PR China.
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16
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Cui Y, Zhu Y, Lin Y, Chen L, Feng Q, Wang W, Xiang H. New insight into the mechanism underlying the silk gland biological process by knocking out fibroin heavy chain in the silkworm. BMC Genomics 2018; 19:215. [PMID: 29580211 PMCID: PMC5870212 DOI: 10.1186/s12864-018-4602-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 03/13/2018] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Exploring whether and how mutation of silk protein contributes to subsequent re-allocation of nitrogen, and impacts on the timing of silk gland degradation, is important to understand silk gland biology. Rapid development and wide application of genome editing approach in the silkworm provide us an opportunity to address these issues. RESULTS Using CRISPR/Cas9 system, we successfully performed genome editing of Bmfib-H. The loss-of-function mutations caused naked pupa and thin cocoon mutant phenotypes. Compared with the wild type, the posterior silk gland of mutant showed obviously degraded into fragments in advance of programmed cell death of silk gland cells. Comparative transcriptomic analyses of silk gland at the fourth day of the fifth instar larval stage(L5D4)identified 1456 differential expressed genes (DEGs) between posterior silk gland (PSG) and mid silk gland (MSG) and 1388 DEGs between the mutant and the wild type. Hierarchical clustering of all the DEGs indicated a remarkable down-regulated and an up-regulated gene clade in the mutant silk glands, respectively. Down-regulated genes were overrepresented in the pathways involved in cancer, DNA replication and cell proliferation. Intriguingly, up-regulated DEGs are significantly enriched in the proteasome. By further comparison on the transcriptome of MSG and PSG between the wild type and the mutant, we consistently observed that up-regulated DEGs in the mutant PSG were enriched in protein degrading activity and proteasome. Meantime, we observed a series of up-regulated genes involved in autophagy. Since these protein degradation processes would be normally occur after the spinning time, the results suggesting that these progresses were activated remarkably ahead of schedule in the mutant. CONCLUSIONS Accumulation of abnormal fib-H protein might arouse the activation of proteasomes as well as autophagy process, to promote the rapid degradation of such abnormal proteins and the silk gland cells. Our study therefore proposes a subsequent process of protein and partial cellular degradation caused by mutation of silk protein, which might be helpful for understanding its impact of the silk gland biological process, and further exploration the re-allocation of nitrogen in the silkworm.
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Affiliation(s)
- Yong Cui
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, 510631, China
| | - Yanan Zhu
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, 510631, China
| | - Yongjian Lin
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, 510631, China
| | - Lei Chen
- Center for Ecological and Environmental Sciences, Northwestern Polytechnical University, Xi'an, 710129, China
| | - Qili Feng
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, 510631, China
| | - Wen Wang
- Center for Ecological and Environmental Sciences, Northwestern Polytechnical University, Xi'an, 710129, China.
| | - Hui Xiang
- Guangzhou Key Laboratory of Insect Development Regulation and Application Research, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, 510631, China.
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17
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Dong HL, Zhang SX, Tao H, Chen ZH, Li X, Qiu JF, Cui WZ, Sima YH, Cui WZ, Xu SQ. Metabolomics differences between silkworms (Bombyx mori) reared on fresh mulberry (Morus) leaves or artificial diets. Sci Rep 2017; 7:10972. [PMID: 28887546 PMCID: PMC5591246 DOI: 10.1038/s41598-017-11592-4] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 08/24/2017] [Indexed: 12/14/2022] Open
Abstract
Silkworms (Bombyx mori) reared on artificial diets have great potential applications in sericulture. However, the mechanisms underlying the enhancement of metabolic utilization by altering silkworm nutrition are unclear. The aim of this study was to investigate the mechanisms responsible for the poor development and low silk protein synthesis efficiency of silkworms fed artificial diets. After multi-generational selection of the ingestive behavior of silkworms to artificial diets, we obtained two strains, one of which developed well and another in which almost all its larvae starved to death on the artificial diets. Subsequently, we analyzed the metabolomics of larval hemolymph by gas chromatography/liquid chromatography–mass spectrometry, and the results showed that vitamins were in critically short supply, whereas the nitrogen metabolic end product of urea and uric acid were enriched substantially, in the hemolymph of the silkworms reared on the artificial diets. Meanwhile, amino acid metabolic disorders, as well as downregulation of carbohydrate metabolism, energy metabolism, and lipid metabolism, co-occurred. Furthermore, 10 male-dominant metabolites and 27 diet-related metabolites that differed between male and female silkworms were identified. These findings provide important insights into the regulation of silkworm metabolism and silk protein synthesis when silkworms adapt to an artificial diet.
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Affiliation(s)
- Hui-Ling Dong
- 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
| | - Sheng-Xiang Zhang
- College of Forestry, Shandong Agricultural University, Taian Shandong, 271018, China
| | - Hui Tao
- 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
| | - Zhuo-Hua 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
| | - Xue 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
| | - Jian-Feng Qiu
- 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
| | - Wen-Zhao Cui
- 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.,National Engineering Laboratory for Modern Silk (NEAER), Soochow University, Suzhou, 215123, China
| | - Wei-Zheng Cui
- College of Forestry, Shandong Agricultural University, Taian Shandong, 271018, 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. .,National Engineering Laboratory for Modern Silk (NEAER), Soochow University, Suzhou, 215123, China.
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18
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Wu G, Song P, Zhang D, Liu Z, Li L, Huang H, Zhao H, Wang N, Zhu Y. Robust composite silk fibers pulled out of silkworms directly fed with nanoparticles. Int J Biol Macromol 2017. [PMID: 28625835 DOI: 10.1016/j.ijbiomac.2017.06.069] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
This paper reports the impacts of direct feeding silkworms with different nanoparticles (Cu, Fe, and TiO2) on the morphology, structures, and mechanical properties of the resulting silk fiber (SF). The contents of the Cu nanoparticles were 38 times higher in the posterior silk glands and only 2-3 times higher in the SF and in the middle silk glands compared with the controlled groups. Significant changes of the surface morphology, structures, and diameter of the Cu nanoparticle fed SF have been observed, which are attributed to a slight SF protein reconstruction or conformational change in the mixture of silk fibroin and sericin in the silk glands. The resulting Cu-containing SF exhibits good tensile strength of 360MPa and reaches a strain of 38%, which are 89% and 36% higher than those of the natural SF. This study offers a new green strategy for the easy modification to achieve robust composite SF.
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Affiliation(s)
- GuoHua Wu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212018, PR China; College of Biotechnology and Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang, 212018, PR China.
| | - Peng Song
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212018, PR China
| | - DongYang Zhang
- College of Biotechnology and Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang, 212018, PR China
| | - ZeYu Liu
- College of Biotechnology and Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang, 212018, PR China
| | - Long Li
- College of Biotechnology and Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang, 212018, PR China
| | - HuiMing Huang
- Institute of Biomechanics and Medical Engineering, Tsinghua University, Beijing 100084, PR China
| | - HongPing Zhao
- Institute of Biomechanics and Medical Engineering, Tsinghua University, Beijing 100084, PR China.
| | - NanNan Wang
- College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, UK
| | - YanQiu Zhu
- College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, UK.
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19
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Wang L, Liu S, Yang W, Yu H, Zhang L, Ma P, Wu P, Li X, Cho K, Xue S, Jiang B. Plasma Amino Acid Profile in Patients with Aortic Dissection. Sci Rep 2017; 7:40146. [PMID: 28071727 PMCID: PMC5223271 DOI: 10.1038/srep40146] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 11/28/2016] [Indexed: 12/13/2022] Open
Abstract
Aortic dissection (AD), a severe cardiovascular disease with the characteristics of high mortality, is lack of specific clinical biomarkers. In order to facilitate the diagnosis of AD, we investigated plasma amino acid profile through metabolomics approach. Total 33 human subjects were enrolled in the study: 11 coronary heart disease (CHD) patients without aortic lesion and 11 acute AD and 11 chronic AD. Amino acids were identified in plasma using liquid chromatography and mass spectrometry (LC-MS/MS), and were further subjected to multiple logistic regression analysis. The score plots of principal component analysis (PCA) and partial least squares-discriminate analysis (PLS-DA) showed clear discrimination of CHD patients with AD, acute AD or chronic AD patients, respectively. The contents of histidine, glycine, serine, citrate, ornithine, hydroxyproline, proline and sarcosine were significant different in acute AD patients comparing with CHD patients. The levels of citrate, GABA, glutamate and cysteine were significant different in chronic AD patients comparing with CHD patients. The contents of glutamate and phenylalanine were significant changed in acute AD patients comparing with chronic AD patients. Plasma aminograms were significantly altered in patients with AD comparing with CHD, especially in acute AD, suggesting amino acid profile is expected to exploit a novel, non-invasive, objective diagnosis for AD.
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Affiliation(s)
- Linlin Wang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Sha Liu
- Department of Cardiovascular Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, China.,Covidien (Shanghai) Management Consulting Co., Ltd, Shanghai 200233, China
| | - Wengang Yang
- Department of Cardiovascular Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
| | - Haitao Yu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Li Zhang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Ping Ma
- The Second Artillery General Hospital PLA, Beijing 100088, China
| | - Peng Wu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Xue Li
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Kenka Cho
- Takarazuka University of Medical and Health Care, Hanayashiki-Midorigaoka, Takarazuka-city 6660162, Japan
| | - Song Xue
- Department of Cardiovascular Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
| | - Baohong Jiang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
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20
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Development of chemical isotope labeling liquid chromatography mass spectrometry for silkworm hemolymph metabolomics. Anal Chim Acta 2016; 942:1-11. [DOI: 10.1016/j.aca.2016.06.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Revised: 05/15/2016] [Accepted: 06/01/2016] [Indexed: 11/24/2022]
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21
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Li Y, Wang X, Chen Q, Hou Y, Xia Q, Zhao P. Metabolomics Analysis of the Larval Head of the Silkworm, Bombyx mori. Int J Mol Sci 2016; 17:ijms17091460. [PMID: 27657048 PMCID: PMC5037739 DOI: 10.3390/ijms17091460] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Revised: 08/25/2016] [Accepted: 08/26/2016] [Indexed: 12/22/2022] Open
Abstract
The head, which performs many biological functions, is the most complicated structure of an insect. Development, locomotor behavior, food intake, environmental sensing, and signal transduction are all controlled by the insect’s head. As a well-studied insect in Lepidoptera, the silkworm head has an additional function of spinning silk fibers. To understand which molecules are involved in these physiological activities, we performed a metabolomics analysis of silkworm heads. By integrating GC-MS and LC-MS/MS, 90 metabolites were identified in the larval heads of silkworms. These were classified into 13 categories, including amino acids, sugars, organic acids, nucleotides, alcohols, and fatty acids. Informatics analysis revealed that these metabolites are involved in cellular processes, environmental information processing, genetic information processing, human diseases, metabolism, organismal systems, and other pathways. The identified metabolites and pathways are involved in biological processes such as signal transduction, carbohydrate metabolism, endocrine activities, and sensory activities; reflecting the functions of various organs in silkworm heads. Thus, our findings provide references which elucidate the potential functions of the silkworm head and will be of great value for the metabolomics research of silkworms and other insects.
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Affiliation(s)
- Yi Li
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China.
| | - Xin Wang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China.
| | - Quanmei Chen
- Department of Biochemistry & Molecular Biology, Chongqing Medical University, Chongqing 400016, China.
| | - Yong Hou
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China.
| | - Qingyou Xia
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China.
| | - Ping Zhao
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China.
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Li Y, Wang X, Hou Y, Zhou X, Chen Q, Guo C, Xia Q, Zhang Y, Zhao P. Integrative Proteomics and Metabolomics Analysis of Insect Larva Brain: Novel Insights into the Molecular Mechanism of Insect Wandering Behavior. J Proteome Res 2015; 15:193-204. [PMID: 26644297 DOI: 10.1021/acs.jproteome.5b00736] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Before metamorphosis, most holometabolous insects, such as the silkworm studied here, undergo a special phase called the wandering stage. Insects in this stage often display enhanced locomotor activity (ELA). ELA is vital because it ensures that the insect finds a safe and suitable place to live through the pupal stage. The physiological mechanisms of wandering behavior are still unclear. Here, we integrated proteomics and metabolomics approaches to analyze the brain of the lepidopteran insect, silkworm, at the feeding and wandering stages. Using LC-MS/MS and GC-MS, in all we identified 3004 proteins and 37 metabolites at these two stages. Among them, 465 proteins and 22 metabolites were changed. Neural signal transduction proteins and metabolites, such as neurofilament, dopaminergic synapse related proteins, and glutamic acid, were significantly altered, which suggested that active neural conduction occurred in the brain at the wandering stage. We also found decreased dopamine degradation at the wandering stage. The proposed changes in active neural conduction and increased dopamine concentration might induce ELA. In addition, proteins involved in the ubiquitin proteasome system and lysosome pathway were upregulated, revealing that the brain experiences morphological remodeling during metamorphosis. These findings yielded novel insights into the molecular mechanism underlying insect wandering behavior.
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Affiliation(s)
- Yi Li
- State Key Laboratory of Silkworm Genome Biology, Southwest University , Chongqing 400716, China
| | - Xin Wang
- State Key Laboratory of Silkworm Genome Biology, Southwest University , Chongqing 400716, China
| | - Yong Hou
- State Key Laboratory of Silkworm Genome Biology, Southwest University , Chongqing 400716, China
| | - Xiaoying Zhou
- State Key Laboratory of Silkworm Genome Biology, Southwest University , Chongqing 400716, China
| | - Quanmei Chen
- Department of Biochemistry & Molecular Biology, Chongqing Medical University , Chongqing 400016, China
| | - Chao Guo
- State Key Laboratory of Silkworm Genome Biology, Southwest University , Chongqing 400716, China
| | - Qingyou Xia
- State Key Laboratory of Silkworm Genome Biology, Southwest University , Chongqing 400716, China
| | - Yan Zhang
- State Key Laboratory of Silkworm Genome Biology, Southwest University , Chongqing 400716, China
| | - Ping Zhao
- State Key Laboratory of Silkworm Genome Biology, Southwest University , Chongqing 400716, China
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Comparative proteomic analysis of silkworm fat body after knocking out fibroin heavy chain gene: a novel insight into cross-talk between tissues. Funct Integr Genomics 2015; 15:611-37. [DOI: 10.1007/s10142-015-0461-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2015] [Revised: 07/28/2015] [Accepted: 08/02/2015] [Indexed: 11/25/2022]
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24
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Zhou L, Li H, Hao F, Li N, Liu X, Wang G, Wang Y, Tang H. Developmental Changes for the Hemolymph Metabolome of Silkworm (Bombyx mori L.). J Proteome Res 2015; 14:2331-47. [PMID: 25825269 DOI: 10.1021/acs.jproteome.5b00159] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Silkworm (Bombyx mori) is a lepidopteran-holometabolic model organism. To understand its developmental biochemistry, we characterized the larval hemolymph metabonome from the third instar to prepupa stage using (1)H NMR spectroscopy whilst hemolymph fatty acid composition using GC-FID/MS. We unambiguously assigned more than 60 metabolites, among which tyrosine-o-β-glucuronide, mesaconate, homocarnosine, and picolinate were reported for the first time from the silkworm hemolymph. Phosphorylcholine was the most abundant metabolite in all developmental stages with exception for the periods before the third and fourth molting. We also found obvious developmental dependence for the hemolymph metabonome involving multiple pathways including protein biosyntheses, glycolysis, TCA cycle, the metabolisms of choline amino acids, fatty acids, purines, and pyrimidines. Most hemolymph amino acids had two elevations during the feeding period of the fourth instar and prepupa stage. Trehalose was the major blood sugar before day 8 of the fifth instar, whereas glucose became the major blood sugar after spinning. C16:0, C18:0 and its unsaturated forms were dominant fatty acids in hemolymph. The developmental changes of hemolymph metabonome were associated with dietary nutrient intakes, biosyntheses of cell membrane, pigments, proteins, and energy metabolism. These findings offered essential biochemistry information in terms of the dynamic metabolic changes during silkworm development.
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Affiliation(s)
- Lihong Zhou
- †College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.,‡Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China.,¶College of Life Sciences, Jianghan University, Wuhan 430056, China
| | - Huihui Li
- ‡Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
| | - Fuhua Hao
- ‡Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
| | - Ning Li
- ‡Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
| | - Xin Liu
- †College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Guoliang Wang
- ¶College of Life Sciences, Jianghan University, Wuhan 430056, China
| | - Yulan Wang
- ‡Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China.,⊥Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou 310058, China
| | - Huiru Tang
- ‡Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China.,§State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, Metabonomics and Systems Biology Laboratory, School of Life Sciences, Fudan University, Shanghai 200433, China
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