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Matsumoto Y, Sato E, Sugita T. Induction of acute silkworm hemolymph melanization by Staphylococcus aureus treated with peptidoglycan-degrading enzymes. Drug Discov Ther 2024; 18:194-198. [PMID: 38925960 DOI: 10.5582/ddt.2024.01026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2024]
Abstract
Staphylococcus aureus, a Gram-positive bacterium, causes inflammatory skin diseases, such as atopic dermatitis, and serious systemic diseases, such as sepsis. In the skin and nasal environment, peptidoglycan (PGN)-degrading enzymes, including lysozyme and lysostaphin, affects S. aureus PGN. However, the effects of PGN-degrading enzymes on the acute innate immune-inducing activity of S. aureus have not yet been investigated. In this study, we demonstrated that PGN-degrading enzymes induce acute silkworm hemolymph melanization by S. aureus. Insoluble fractions of S. aureus treated with lysozyme, lysostaphin, or both enzymes, were prepared. Melanization of the silkworm hemolymph caused by the injection of these insoluble fractions was higher than that of S. aureus without enzyme treatment. These results suggest that structural changes in S. aureus PGN caused by PGN-degrading enzymes affect the acute innate immune response in silkworms.
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Affiliation(s)
- Yasuhiko Matsumoto
- Department of Microbiology, Meiji Pharmaceutical University, Tokyo, 204-8588, Japan
| | - Eri Sato
- Department of Microbiology, Meiji Pharmaceutical University, Tokyo, 204-8588, Japan
| | - Takashi Sugita
- Department of Microbiology, Meiji Pharmaceutical University, Tokyo, 204-8588, Japan
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Matsumoto Y, Sato E, Sugita T. Acid-treated Staphylococcus aureus induces acute silkworm hemolymph melanization. PLoS One 2024; 19:e0298502. [PMID: 38814922 PMCID: PMC11139275 DOI: 10.1371/journal.pone.0298502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 04/09/2024] [Indexed: 06/01/2024] Open
Abstract
The skin microbiome maintains healthy human skin, and disruption of the microbiome balance leads to inflammatory skin diseases such as folliculitis and atopic dermatitis. Staphylococcus aureus and Cutibacterium acnes are pathogenic bacteria that simultaneously inhabit the skin and cause inflammatory diseases of the skin through the activation of innate immune responses. Silkworms are useful invertebrate animal models for evaluating innate immune responses. In silkworms, phenoloxidase generates melanin as an indicator of innate immune activation upon the recognition of bacterial or fungal components. We hypothesized that S. aureus and C. acnes interact to increase the innate immunity-activating properties of S. aureus. In the present study, we showed that acidification is involved in the activation of silkworm hemolymph melanization by S. aureus. Autoclaved-killed S. aureus (S. aureus [AC]) alone does not greatly activate silkworm hemolymph melanization. On the other hand, applying S. aureus [AC] treated with C. acnes culture supernatant increased the silkworm hemolymph melanization. Adding C. acnes culture supernatant to the medium decreased the pH. S. aureus [AC] treated with propionic acid, acetic acid, or lactic acid induced higher silkworm hemolymph melanization activity than untreated S. aureus [AC]. S. aureus [AC] treated with hydrochloric acid also induced silkworm hemolymph melanization. The silkworm hemolymph melanization activity of S. aureus [AC] treated with hydrochloric acid was inhibited by protease treatment of S. aureus [AC]. These results suggest that acid treatment of S. aureus induces innate immune activation in silkworms and that S. aureus proteins are involved in the induction of innate immunity in silkworms.
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Affiliation(s)
- Yasuhiko Matsumoto
- Department of Microbiology, Meiji Pharmaceutical University, Tokyo, Japan
| | - Eri Sato
- Department of Microbiology, Meiji Pharmaceutical University, Tokyo, Japan
| | - Takashi Sugita
- Department of Microbiology, Meiji Pharmaceutical University, Tokyo, Japan
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Matsumoto Y, Sato E, Sugita T. Acute melanization of silkworm hemolymph by peptidoglycans of the human commensal bacterium Cutibacterium acnes. PLoS One 2022; 17:e0271420. [PMID: 36155485 PMCID: PMC9512201 DOI: 10.1371/journal.pone.0271420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 09/12/2022] [Indexed: 11/18/2022] Open
Abstract
Cutibacterium acnes is a pathogenic bacterium that cause inflammatory diseases of the skin and intervertebral discs. The immune activation induced by C. acnes requires multiple cellular responses in the host. Silkworm, an invertebrate, generates melanin by phenoloxidase upon recognizing bacterial or fungal components. Therefore, the melanization reaction can be used as an indicator of innate immune activation. A silkworm infection model was developed for evaluating the virulence of C. acnes, but a system for evaluating the induction of innate immunity by C. acnes using melanization as an indicator has not yet been established. Here we demonstrated that C. acnes rapidly causes melanization of the silkworm hemolymph. On the other hand, Staphylococcus aureus, a gram-positive bacterium identical to C. acnes, does not cause immediate melanization. Even injection of heat-killed C. acnes cells caused melanization of the silkworm hemolymph. DNase, RNase, and protease treatment of the heat-treated C. acnes cells did not decrease the silkworm hemolymph melanization. Treatment with peptidoglycan-degrading enzymes, such as lysostaphin and lysozyme, however, decreased the induction of melanization by the heat-treated C. acnes cells. These findings suggest that silkworm hemolymph melanization may be a useful indicator to evaluate innate immune activation by C. acnes and that C. acnes peptidoglycans are involved in the induction of innate immunity in silkworms.
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Affiliation(s)
- Yasuhiko Matsumoto
- Department of Microbiology, Meiji Pharmaceutical University, Kiyose, Tokyo, Japan
- * E-mail:
| | - Eri Sato
- Department of Microbiology, Meiji Pharmaceutical University, Kiyose, Tokyo, Japan
| | - Takashi Sugita
- Department of Microbiology, Meiji Pharmaceutical University, Kiyose, Tokyo, Japan
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Wang Q, Sun Z, Ma S, Liu X, Xia H, Chen K. Molecular mechanism and potential application of bacterial infection in the silkworm, Bombyx mori. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2022; 131:104381. [PMID: 35245606 DOI: 10.1016/j.dci.2022.104381] [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: 01/06/2022] [Revised: 02/14/2022] [Accepted: 02/27/2022] [Indexed: 06/14/2023]
Abstract
As a representative species of Lepidoptera, Bombyx mori has been widely studied and applied. However, bacterial infection has always been an important pathogen threatening the growth of silkworms. Bombyx mori can resist various pathogenic bacteria through their own physical barrier and innate immune system. However, compared with other insects, such as Drosophila melanogaster, research on the antibacterial mechanism of silkworms is still in its infancy. This review systematically summarized the routes of bacterial infection in silkworms, the antibacterial mechanism of silkworms after ingestion or wounding infection, and the intestinal bacteria and infection of silkworms. Finally, we will discuss silkworms as a model animal for studying bacterial infectious diseases and screening antibacterial drugs.
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Affiliation(s)
- Qiang Wang
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu, PR China
| | - Zhonghe Sun
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu, PR China
| | - Shangshang Ma
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, PR China
| | - Xiaoyong Liu
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu, PR China
| | - Hengchuan Xia
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu, PR China
| | - Keping Chen
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu, PR China.
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5
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Liu Y, Yu Y, Dai H, Fei A. Efficacy of Shufeng Jiedu Capsules in the treatment of sepsis: A prospective, randomized, placebo-controlled trial. Eur J Integr Med 2020. [DOI: 10.1016/j.eujim.2020.101172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Bailly C, Vergoten G. Fraxinellone: From pesticidal control to cancer treatment. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2020; 168:104624. [PMID: 32711764 DOI: 10.1016/j.pestbp.2020.104624] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/02/2020] [Accepted: 06/02/2020] [Indexed: 06/11/2023]
Abstract
Fraxinellone (FRA) is a degraded limonoid isolated from the root bark of Dictamnus plants. The potent insecticidal activity of FRA has led to the synthesis of numerous derivatives (presented here with the structure-activity relationships) active against the oriental armyworm Mythimna separata Walker. In addition to its pesticidal activity, the natural product displays potent anti-inflammatory and immuno-modulatory effects at the origin of hepatoprotective and anticancer properties. This mini-review provides an update of the mechanism of action of FRA to highlight the recently discovered capacity of the compound to deactivate cancer-associated fibroblasts and thus to limit the immunosuppressive tumor microenvironment. The anticancer mode of action of FRA raises new ideas to better understand its primary insecticidal activity. The relationship between drug-induced cancer cell death and insect cell death is discussed. A drug interaction with the insect cytokine growth-blocking peptide (GBP), a member of the large EGF family, is proposed, supported by preliminary molecular modeling data. Altogether, the review shed light on the pharmacological properties of fraxinellone as an antitumor agent and a natural insecticide.
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Affiliation(s)
| | - Gérard Vergoten
- University of Lille, Inserm, U995 - LIRIC - Lille Inflammation Research International Center, ICPAL, 3 rue du Professeur Laguesse, BP-83, F-59006 Lille, France
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Urai M, Aizawa T, Imamura K, Hamamoto H, Sekimizu K. Characterization of the chemical structure and innate immune-stimulating activity of an extracellular polysaccharide from Rhizobium sp. strain M2 screened using a silkworm muscle contraction assay. Drug Discov Ther 2017; 11:238-245. [PMID: 29021503 DOI: 10.5582/ddt.2017.01045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We screened innate immunostimulant-producing bacteria using a silkworm muscle contraction assay, and isolated Rhizobium sp. strain M2 from soil. We purified the innate immunostimulant from strain M2, and characterized the chemical structure by nuclear magnetic resonance spectroscopy and chemical analyses. The innate immunostimulant (M2 EPS) comprised glucose, galactose, pyruvic acid, and succinic acid with a molar ratio of 6.8:1.0:0.9:0.4, and had a succinoglycan-like high molecular-weight heteropolysaccharide structure. To determine the structural motif involved in the innate immunostimulating activity, we modified the M2 EPS structure chemically, and found that the activity was increased by removal of the succinic and pyruvic acid substitutions. Strong acid hydrolysis completely inactivated the M2 EPS. Unmasking of the β-1,3/6-glucan structure of the side-chain by deacylation and depyruvylation may enhance the innate immune-stimulating activity of M2 EPS. These findings suggest that the succinoglycan-like polysaccharide purified from strain M2 has innate immune-stimulating activity, and its glycan structure is necessary for the activity.
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Affiliation(s)
- Makoto Urai
- Graduate School of Pharmaceutical Sciences, The University of Tokyo.,Department of Chemistry for Life Sciences and Agriculture, Faculty of Life Sciences, Tokyo University of Agriculture
| | - Tomoko Aizawa
- Department of Bioscience in Daily Life, College of Bioresource Sciences, Nihon University
| | - Katsutoshi Imamura
- Graduate School of Pharmaceutical Sciences, The University of Tokyo.,Department of Microbiology and Molecular Genetics, Graduate School of Pharmaceutical Sciences, Chiba University
| | - Hiroshi Hamamoto
- Graduate School of Pharmaceutical Sciences, The University of Tokyo.,Teikyo University Institute of Medical Mycology
| | - Kazuhisa Sekimizu
- Graduate School of Pharmaceutical Sciences, The University of Tokyo.,Genome Pharmaceuticals Institute Co., Ltd.,Teikyo University Institute of Medical Mycology
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Abstract
As an important economic insect, silkworm Bombyx mori (L.) (Lepidoptera: Bombycidae) has numerous advantages in life science, such as low breeding cost, large progeny size, short generation time, and clear genetic background. Additionally, there are rich genetic resources associated with silkworms. The completion of the silkworm genome has further accelerated it to be a modern model organism in life science. Genomic studies showed that some silkworm genes are highly homologous to certain genes related to human hereditary disease and, therefore, are a candidate model for studying human disease. In this article, we provided a review of silkworm as an important model in various research areas, including human disease, screening of antimicrobial agents, environmental safety monitoring, and antitumor studies. In addition, the application potentiality of silkworm model in life sciences was discussed.
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Affiliation(s)
- Xu Meng
- Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Feifei Zhu
- Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Keping Chen
- Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, Jiangsu, China
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Ishii M, Matsumoto Y, Nishida S, Sekimizu K. Decreased sugar concentration in vegetable and fruit juices by growth of functional lactic acid bacteria. Drug Discov Ther 2017; 11:30-34. [DOI: 10.5582/ddt.2016.01079] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | | | | | - Kazuhisa Sekimizu
- Genome Pharmaceuticals Institute Co., Ltd
- Teikyo University Institute of Medical Mycology
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Urai M, Kataoka K, Nishida S, Sekimizu K. Structural analysis of an innate immunostimulant from broccoli, Brassica oleracea var. italica . Drug Discov Ther 2017; 11:230-237. [DOI: 10.5582/ddt.2017.01044] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Makoto Urai
- Graduate School of Pharmaceutical Sciences, The University of Tokyo
| | | | | | - Kazuhisa Sekimizu
- Graduate School of Pharmaceutical Sciences, The University of Tokyo
- Genome Pharmaceuticals Institute Co., Ltd
- Teikyo University Institute of Medical Mycology
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Zhang C, Wang Y, Fang Q, Xu M, Lv M, Liao J, Li S, Nie Z, Zhang W. Thymosin From Bombyx mori Is Down-Regulated in Expression by BmNPV Exhibiting Antiviral Activity. JOURNAL OF INSECT SCIENCE (ONLINE) 2016; 16:75. [PMID: 27432352 PMCID: PMC4948601 DOI: 10.1093/jisesa/iew039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Accepted: 05/09/2016] [Indexed: 06/06/2023]
Abstract
Thymosins have been highly conserved during evolution. These hormones exist in many animal species and play an essential role in many biological events. However, little is known regarding the physiological function of silkworm Bombyx mori thymosin (BmTHY). In this study, we investigated the expression pattern of BmTHY in a Bombyx mori larval ovarian cell line (BmN) challenged with Bombyx mori nuclear polyhydrosis virus (BmNPV) and the antiviral effect of recombinant BmTHY (rBmTHY) for Bombyx mori against BmNPV. Western-blot assay and qRT-PCR analysis revealed that the level of BmTHY protein expression and transcription decreased over time when BmN cells were infected by BmNPV. Treatment with endotoxin-free rBmTHY led to a significant reduction in viral titer in the supernatant of BmN cells challenged with BmNPV. The results from antiviral tests performed in vitro and in vivo showed that endotoxin-free rBmTHY improved the survival rate of Bombyx mori infected with BmNPV. These findings suggest that BmTHY exerts immunomodulatory effects on Bombyx mori, rendering them resistant to viral infection.
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Affiliation(s)
- Chen Zhang
- College of Life Science, Institute of Biochemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China (; ; ; ; ; ; wuxinzm@126. com; )
| | - Yongdi Wang
- College of Life Science, Institute of Biochemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China (; ; ; ; ; ; wuxinzm@126. com; )
| | - Qiang Fang
- College of Life Science, Institute of Biochemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China (; ; ; ; ; ; wuxinzm@126. com; )
| | - Minlin Xu
- College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Mengyuan Lv
- College of Life Science, Institute of Biochemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China (; ; ; ; ; ; wuxinzm@126. com; )
| | - Jinxu Liao
- College of Life Science, Institute of Biochemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China (; ; ; ; ; ; wuxinzm@126. com; )
| | - Si Li
- College of Life Science, Institute of Biochemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China (; ; ; ; ; ; wuxinzm@126. com; )
| | - Zuoming Nie
- College of Life Science, Institute of Biochemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China (; ; ; ; ; ; wuxinzm@126. com; ) Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou 310018, China
| | - Wenping Zhang
- College of Life Science, Institute of Biochemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China (; ; ; ; ; ; wuxinzm@126. com; ) Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou 310018, China
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12
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Singh D, Chetia H, Kabiraj D, Sharma S, Kumar A, Sharma P, Deka M, Bora U. A comprehensive view of the web-resources related to sericulture. Database (Oxford) 2016; 2016:baw086. [PMID: 27307138 PMCID: PMC4909305 DOI: 10.1093/database/baw086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 04/25/2016] [Accepted: 05/02/2016] [Indexed: 12/03/2022]
Abstract
Recent progress in the field of sequencing and analysis has led to a tremendous spike in data and the development of data science tools. One of the outcomes of this scientific progress is development of numerous databases which are gaining popularity in all disciplines of biology including sericulture. As economically important organism, silkworms are studied extensively for their numerous applications in the field of textiles, biomaterials, biomimetics, etc. Similarly, host plants, pests, pathogens, etc. are also being probed to understand the seri-resources more efficiently. These studies have led to the generation of numerous seri-related databases which are extremely helpful for the scientific community. In this article, we have reviewed all the available online resources on silkworm and its related organisms, including databases as well as informative websites. We have studied their basic features and impact on research through citation count analysis, finally discussing the role of emerging sequencing and analysis technologies in the field of seri-data science. As an outcome of this review, a web portal named SeriPort, has been created which will act as an index for the various sericulture-related databases and web resources available in cyberspace.Database URL: http://www.seriport.in/.
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Affiliation(s)
- Deepika Singh
- Bioengineering Research Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Hasnahana Chetia
- Bioengineering Research Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Debajyoti Kabiraj
- Bioengineering Research Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Swagata Sharma
- Bioengineering Research Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Anil Kumar
- Centre for Biological Sciences (Bioinformatics), Central University of South Bihar (CUSB), Patna 800014, India
| | - Pragya Sharma
- Department of Bioengineering & Technology, Gauhati University Institute of Science & Technology, Gauhati University, Guwahati, Assam 781014, India
| | - Manab Deka
- Department of Bioengineering & Technology, Gauhati University Institute of Science & Technology, Gauhati University, Guwahati, Assam 781014, India
| | - Utpal Bora
- Bioengineering Research Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India Mugagen Laboratories Pvt. Ltd, Technology Incubation Centre, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
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