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Nakayama K, Obayashi Y, Munechika L, Kitamura SI, Yanagida T, Honjo M, Murakami S, Hirose E. Regeneration of tunic cuticle is suppressed in edible ascidian Halocynthia roretzi contracting soft tunic syndrome. DISEASES OF AQUATIC ORGANISMS 2024; 159:37-48. [PMID: 39087618 DOI: 10.3354/dao03801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
Soft tunic syndrome is an infectious disease caused by the flagellate Azumiobodo hoyamushi, which severely damages the aquaculture of the edible ascidian Halocynthia roretzi. Tunic is a cellulosic extracellular matrix entirely covering the body in ascidians and other tunicates, and its dense cuticle layer covers the tunic surface as a physical barrier against microorganisms. When the tunic of intact H. roretzi individuals was cut into strips, electron-dense fibers (DFs) appeared on the cut surface of the tunic matrix and aggregated to regenerate a new cuticular layer in seawater within a few days. DF formation was partially or completely inhibited in individuals with soft tunic syndrome, and DF formation was also inhibited by the presence of some proteases, indicating the involvement of proteolysis in the process of tunic softening as well as cuticle regeneration. Using pure cultures of the causative flagellate A. hoyamushi, the expression of protease genes and secretion of some proteases were confirmed by RNA-seq analysis and a 4-methylcoumaryl-7-amide substrate assay. Some of these proteases may degrade proteins in the tunic matrix. These findings suggest that the proteases of A. hoyamushi is the key to understanding the mechanisms of cuticular regeneration inhibition and tunic softening.
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Affiliation(s)
- Kei Nakayama
- Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama, Ehime, 790-8577, Japan
| | - Yumiko Obayashi
- Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama, Ehime, 790-8577, Japan
| | - Leo Munechika
- Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama, Ehime, 790-8577, Japan
| | - Shin-Ichi Kitamura
- Graduate School of Bioresources, Mie University, 1577 Kurimamachiya-cho, Tsu, Mie, 514-8507, Japan
| | - Tetsuya Yanagida
- Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, 753-8515, Japan
| | - Miho Honjo
- Miyagi Prefecture Fisheries Technology Institute, Ishinomaki, Miyagi, 986-2135, Japan
| | - Shoko Murakami
- Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama, Ehime, 790-8577, Japan
| | - Euichi Hirose
- Department of Chemistry, Biology, and Marine Science, Faculty of Science, University of the Ryukyus, Okinawa, 903-0213, Japan
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Jang AY, Rod-in W, Shin IS, Park WJ. Immune Enhancement Effects of Neutral Lipids, Glycolipids, Phospholipids from Halocynthia aurantium Tunic on RAW264.7 Macrophages. J Microbiol Biotechnol 2024; 34:476-483. [PMID: 37942550 PMCID: PMC10940747 DOI: 10.4014/jmb.2307.07003] [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] [Received: 07/03/2023] [Revised: 10/05/2023] [Accepted: 10/30/2023] [Indexed: 11/10/2023]
Abstract
Fractionated lipids of Halocynthia aurantium (Pyuridae) have been demonstrated to possess anti-inflammatory properties. However, their modulatory properties have not been reported yet. Thus, the objective of this study was to determine immune enhancing effects of fractionated lipids from H. aurantium tunic on macrophage cells. The tunic of H. aurantium was used to isolate total lipids, which were then subsequently separated into neutral lipids, glycolipids, and phospholipids. RAW264.7 cells were stimulated with different concentrations (0.5, 1.0, 2.0, and 4.0%) of each fractionated lipid. Cytotoxicity, production of NO, expression levels of immune-associated genes, and signaling pathways were then determined. Neutral lipids and glycolipids significantly stimulated NO and PGE2 production and expression levels of IL-1β, IL-6, TNF-α, and COX-2 in a dose-dependent manner, while phospholipids ineffectively induced NO production and mRNA expression. Furthermore, it was found that both neutral lipids and glycolipids increased NF-κB p-65, p38, ERK1/2, and JNK phosphorylation, suggesting that these lipids might enhance immunity by activating NF-κB and MAPK signaling pathways. In addition, H. aurantium lipids-induced TNF-α expression was decreased by blocking MAPK or NF-κB signaling pathways. Phagocytic activity of RAW 264.7 cells was also significantly enhanced by neutral lipids and glycolipids. These results suggest that neutral lipids and glycolipids from H. aurantium tunic have potential as immune-enhancing materials.
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Affiliation(s)
- A-yeong Jang
- Department of Wellness-Bio Industry, Gangneung-Wonju National University, Gangneung, Gangwon 25457, Republic of Korea
- Department of Marine Bio Food Science, Gangneung-Wonju National University, Gangneung, Gangwon 25457, Republic of Korea
| | - Weerawan Rod-in
- Department of Marine Bio Food Science, Gangneung-Wonju National University, Gangneung, Gangwon 25457, Republic of Korea
- Department of Agricultural Science, Faculty of Agriculture Natural Resources and Environment, Naresuan University, Phitsanulok 65000 Thailand
| | - Il-shik Shin
- Department of Marine Bio Food Science, Gangneung-Wonju National University, Gangneung, Gangwon 25457, Republic of Korea
| | - Woo Jung Park
- Department of Wellness-Bio Industry, Gangneung-Wonju National University, Gangneung, Gangwon 25457, Republic of Korea
- Department of Marine Bio Food Science, Gangneung-Wonju National University, Gangneung, Gangwon 25457, Republic of Korea
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Braconcini M, Gorrasi S, Fenice M, Barghini P, Pasqualetti M. Rambellisea gigliensis and Rambellisea halocynthiae, gen. et spp. nov. (Lulworthiaceae) from the Marine Tunicate Halocynthia papillosa. J Fungi (Basel) 2024; 10:127. [PMID: 38392799 PMCID: PMC10890369 DOI: 10.3390/jof10020127] [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: 11/20/2023] [Revised: 01/24/2024] [Accepted: 02/01/2024] [Indexed: 02/24/2024] Open
Abstract
In this study, 15 Lulworthiales strains isolated from the marine tunicate Halocynthia papillosa collected in the central Tyrrhenian Sea were characterized using a polyphasic approach (morpho-physiological, molecular, and phylogenetic analyses). Based on multi-locus phylogenetic inference and morphological characters, a new genus, Rambellisea, and two new species, R. halocynthiae and R. gigliensis (Lulworthiales), were proposed. Multi-locus phylogenetic analyses using the nuclear ribosomal regions of DNA (nrITS1-nr5.8S-nrITS2, nrLSU, and nrSSU) sequence data strongly supported the new taxa. Phylogenetic inference, estimated using Maximum Likelihood and Bayesian Inference, clearly indicates that Rambellisea gen. nov. forms a distinct clade within the order Lulworthiales. Moreover, the two new species were separated into distinct subclades, solidly supported by the analyses. This is the first report of Lulworthiales species isolated from animals.
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Affiliation(s)
- Martina Braconcini
- Department of Ecological and Biological Sciences (DEB), University of Tuscia, 01100 Viterbo, Italy
| | - Susanna Gorrasi
- Department of Ecological and Biological Sciences (DEB), University of Tuscia, 01100 Viterbo, Italy
| | - Massimiliano Fenice
- Department of Ecological and Biological Sciences (DEB), University of Tuscia, 01100 Viterbo, Italy
- Laboratory of Applied Marine Microbiology, CoNISMa, Department of Ecological and Biological Sciences, University of Tuscia, 01100 Viterbo, Italy
| | - Paolo Barghini
- Department of Ecological and Biological Sciences (DEB), University of Tuscia, 01100 Viterbo, Italy
| | - Marcella Pasqualetti
- Department of Ecological and Biological Sciences (DEB), University of Tuscia, 01100 Viterbo, Italy
- Laboratory of Ecology of Marine Fungi, CoNISMa, Department of Ecological and Biological Sciences, University of Tuscia, 01100 Viterbo, Italy
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Ding C, Cheng K, Wang Y, Yi Y, Chen X, Li J, Liang K, Zhang M. Dual green hemostatic sponges constructed by collagen fibers disintegrated from Halocynthia roretzi by a shortcut method. Mater Today Bio 2024; 24:100946. [PMID: 38283984 PMCID: PMC10821602 DOI: 10.1016/j.mtbio.2024.100946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/27/2023] [Accepted: 01/03/2024] [Indexed: 01/30/2024] Open
Abstract
Recently, biomacromolecules have received considerable attention in hemostatic materials. Collagen, an ideal candidate for hemostatic sponges due to its involvement in the clotting process, has been facing challenges in extraction from raw materials, which is time-consuming, expensive, and limited by cultural and religious restrictions associated with traditional livestock and poultry sources. To address these issues, this study explored a new shortcut method that using wild Halocynthia roretzi (HR), a marine fouling organism, as a raw material for developing HR collagen fiber sponge (HRCFs), which employed urea to disrupt hydrogen bonds between collagen fiber aggregates. This method simplifies traditional complex manufacturing processes while utilized marine waste, thus achieving dual green in terms of raw materials and manufacturing processes. FTIR results confirmed that the natural triple-helical structure of collagen was preserved. HRCFs exhibit a blood absorption ratio of 2000-3500 %, attributed to their microporous structure, as demonstrated by kinetic studies following a capillary model. Remarkably, the cytotoxicity and hemolysis ratio of HRCFs are negligible. Furthermore, during in vivo hemostasis tests using rabbit ear and kidney models, HRCFs significantly reduce blood loss and shorten hemostasis time compared to commercial gelatin sponge and gauze, benefiting from the capillary effect and collagen's coagulation activity. This study provides new insights into the design of collagen-based hemostatic biomaterials, especially in terms of both raw material and green manufacturing processes.
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Affiliation(s)
- Cuicui Ding
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, 350118, PR China
| | - Kuan Cheng
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, 350118, PR China
| | - Yue Wang
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, 350118, PR China
| | - Yifan Yi
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, 350118, PR China
| | - Xiaohong Chen
- Department of Ophthalmology, The 900th Hospital of Joint Logistic Support Force, PLA (Clinical Medical College of Fujian Medical University, Dongfang Hospital Affiliated to Xiamen University), Fuzhou, 350025, PR China
| | - Jingyi Li
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, 350122, PR China
| | - Kaiwen Liang
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou, 350108, PR China
| | - Min Zhang
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou, 350108, PR China
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Kim M, Doh H. Upcycling Food By-products: Characteristics and Applications of Nanocellulose. Chem Asian J 2024:e202301068. [PMID: 38246883 DOI: 10.1002/asia.202301068] [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: 12/11/2023] [Revised: 01/16/2024] [Accepted: 01/17/2024] [Indexed: 01/23/2024]
Abstract
Rising global food prices and the increasing prevalence of food insecurity highlight the imprudence of food waste and the inefficiencies of the current food system. Upcycling food by-products holds significant potential for mitigating food loss and waste within the food supply chain. Food by-products can be utilized to extract nanocellulose, a material that has obtained substantial attention recently due to its renewability, biocompatibility, bioavailability, and a multitude of remarkable properties. Cellulose nanomaterials have been the subject of extensive research and have shown promise across a wide array of applications, including the food industry. Notably, nanocellulose possesses unique attributes such as a surface area, aspect ratio, rheological behavior, water absorption capabilities, crystallinity, surface modification, as well as low possibilities of cytotoxicity and genotoxicity. These qualities make nanocellulose suitable for diverse applications spanning the realms of food production, biomedicine, packaging, and beyond. This review aims to provide an overview of the outcomes and potential applications of cellulose nanomaterials derived from food by-products. Nanocellulose can be produced through both top-down and bottom-up approaches, yielding various types of nanocellulose. Each of these variants possesses distinctive characteristics that have the potential to significantly enhance multiple sectors within the commercial market.
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Affiliation(s)
- Mikyung Kim
- Department of Food Science and Biotechnology, Ewha Womans University, Seodaemun-gu, Seoul 03760, Republic of Korea
- Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul, Republic of Korea, 03710
| | - Hansol Doh
- Department of Food Science and Biotechnology, Ewha Womans University, Seodaemun-gu, Seoul 03760, Republic of Korea
- Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul, Republic of Korea, 03710
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Liu Y, Wei Z, He M, Zhao W, Wang J, Zhao J. Preparation of dopamine-modified sea squirt cellulose hydrogel dust-fixing agent to prevent raising of dust. ENVIRONMENTAL RESEARCH 2023; 237:116803. [PMID: 37532214 DOI: 10.1016/j.envres.2023.116803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 07/28/2023] [Accepted: 07/30/2023] [Indexed: 08/04/2023]
Abstract
Sea squirts, a tunicate, are found in all oceans and can foul marine ports and aquaculture, mainly affecting shipping and biodiversity. In this study, cellulose was extracted from sea squirts, and its hydrophilic properties were improved by substituting the hydrogen ions of the cellulose -OH with dopamine. The modified cellulose was used to prepare a hydrogel for use as a dust-fixing agent (CDP) to reduce air pollution caused by dust. After response surface method optimization, the proportions of binder, water-retaining agent, wetting agent, and antifreeze in CDP were 0.97, 1.44, 0.23, and 6.32%, respectively. This composition improved the wetting ability and permeability of CDP on particle surfaces. CDP exhibited good water retention at -11-50 °C. CDP reduced the wind erosion rate of dust at a wind speed of 12 m/s to 1.18%. The molecular dynamics method was used to analyze the wetting process and mechanism of CDP, revealing that hydrogen bonds were the dominant force at the solid-liquid interface. The adsorption of CDP onto the surface of coal increased the number of hydrophilic points. Water molecules were adsorbed on these hydrophilic points through hydrogen bonding, improving the binding energy between the solid and liquid interfaces. The application of ascidian cellulose in dust control makes full use of the biological value of ascidians, promoting sustainable development of the global biological economy.
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Affiliation(s)
- Yang Liu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Zhixin Wei
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Mengna He
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Wenbin Zhao
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China.
| | - Jinfeng Wang
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China.
| | - Juan Zhao
- Linyi Vocational University of Science and Technology, Linyi, 276000, China
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Jiang C, Wu M, Zhang F, Liu C, Sun M, Li B. All-Tunicate Cellulose Film with Good Light Management Properties for High-Efficiency Organic Solar Cells. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1221. [PMID: 37049313 PMCID: PMC10096966 DOI: 10.3390/nano13071221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 03/24/2023] [Accepted: 03/27/2023] [Indexed: 06/19/2023]
Abstract
Tunicate nanocellulose with its unique properties, such as excellent mechanical strength, high crystallinity, and good biodegradability, has potential to be used for the preparation of light management film with tunable transmittance and haze. Herein, we prepared a whole tunicate cellulose film with tunable haze levels, by mixing tunicate microfibrillated cellulose (MFC) and tunicate cellulose nanofibrils (CNF). Then, the obtained whole tunicate cellulose film with updated light management was used to modify the organic solar cell (OSC) substrate, aiming to improve the light utilization efficiency of OSC. Results showed that the dosage of MFC based on the weight of CNF was an important factor to adjust the haze and light transmittance of the prepared cellulose film. When the dosage of MFC was 3 wt.%, the haze of the obtained film increased 74.2% compared to the pure CNF film (39.2%). Moreover, the optimized tunicate cellulose film exhibited excellent mechanical properties (e.g., tensile strength of 168 MPa, toughness of 5.7 MJ/m3) and high thermal stability, which will be beneficial to the workability and durability of OSC. More interestingly, we applied the obtained whole tunicate cellulose film with a high haze (68.3%) and high light transmittance (85.0%) as an additional layer to be adhered to the glass substrate of OSC, and a notable improvement (6.5%) of the power conversion efficiency was achieved. With the use of biodegradable tunicate cellulose, this work provides a simple strategy to enhance light management of the transparent substrate of OSC for improving power conversion efficiency.
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Affiliation(s)
- Chen Jiang
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
- CAS Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China; (M.W.); (C.L.)
| | - Meiyan Wu
- CAS Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China; (M.W.); (C.L.)
| | - Fang Zhang
- National Engineering Research Center for Nanotechnology, Shanghai 200241, China;
| | - Chao Liu
- CAS Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China; (M.W.); (C.L.)
| | - Mingliang Sun
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Bin Li
- CAS Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China; (M.W.); (C.L.)
- Lignocellulose Biorefinery Laboratory, Shandong Energy Institute, Qingdao 266101, China
- Metabolomics Group, Qingdao New Energy Shandong Laboratory, Qingdao 266101, China
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Structure and Composition of the Cuticle of the Goose Barnacle Pollicipes pollicipes: A Flexible Composite Biomaterial. Mar Drugs 2023; 21:md21020096. [PMID: 36827137 PMCID: PMC9968147 DOI: 10.3390/md21020096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 01/24/2023] [Accepted: 01/27/2023] [Indexed: 02/03/2023] Open
Abstract
Arthropods, the largest animal phylum, including insects, spiders and crustaceans, are characterized by their bodies being covered primarily in chitin. Besides being a source of this biopolymer, crustaceans have also attracted attention from biotechnology given their cuticles' remarkable and diverse mechanical properties. The goose barnacle, Pollicipes pollicipes, is a sessile crustacean characterized by their body parts covered with calcified plates and a peduncle attached to a substrate covered with a cuticle. In this work, the composition and structure of these plates and cuticle were characterized. The morphology of the tergum plate revealed a compact homogeneous structure of calcium carbonate, a typical composition among marine invertebrate hard structures. The cuticle consisted of an outer zone covered with scales and an inner homogenous zone, predominantly organic, composed of successive layers parallel to the surface. The scales are similar to the tergum plate and are arranged in parallel and oriented semi-vertically. Structural and biochemical characterization confirmed a bulk composition of ɑ-chitin and suggested the presence of elastin-based proteins and collagen. The mechanical properties of the cuticle showed that the stiffness values are within the range of values described in elastomers and soft crustacean cuticles resulting from molting. The removal of calcified components exposed round holes, detailed the structure of the lamina, and changed the protein properties, increasing the rigidity of the material. This flexible cuticle, predominantly inorganic, can provide bioinspiration for developing biocompatible and mechanically suitable biomaterials for diverse applications, including in tissue engineering approaches.
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Mardirossian M, Rubini M, Adamo MFA, Scocchi M, Saviano M, Tossi A, Gennaro R, Caporale A. Natural and Synthetic Halogenated Amino Acids-Structural and Bioactive Features in Antimicrobial Peptides and Peptidomimetics. Molecules 2021; 26:7401. [PMID: 34885985 PMCID: PMC8659048 DOI: 10.3390/molecules26237401] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 11/16/2021] [Accepted: 11/26/2021] [Indexed: 11/17/2022] Open
Abstract
The 3D structure and surface characteristics of proteins and peptides are crucial for interactions with receptors or ligands and can be modified to some extent to modulate their biological roles and pharmacological activities. The introduction of halogen atoms on the side-chains of amino acids is a powerful tool for effecting this type of tuning, influencing both the physico-chemical and structural properties of the modified polypeptides, helping to first dissect and then rationally modify features that affect their mode of action. This review provides examples of the influence of different types of halogenation in amino acids that replace native residues in proteins and peptides. Examples of synthetic strategies for obtaining halogenated amino acids are also provided, focusing on some representative compounds and their biological effects. The role of halogenation in native and designed antimicrobial peptides (AMPs) and their mimetics is then discussed. These are in the spotlight for the development of new antimicrobial drugs to counter the rise of antibiotic-resistant pathogens. AMPs represent an interesting model to study the role that natural halogenation has on their mode of action and also to understand how artificially halogenated residues can be used to rationally modify and optimize AMPs for pharmaceutical purposes.
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Affiliation(s)
- Mario Mardirossian
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Piazza dell’Ospitale, 1, 34125 Trieste, Italy
| | - Marina Rubini
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland;
| | - Mauro F. A. Adamo
- Department of Chemistry, Centre for Synthesis and Chemical Biology (CSCB), RCSI, 123 St. Stephens Green, Dublin 2, Ireland;
| | - Marco Scocchi
- Department of Life Sciences, University of Trieste, Via L. Giorgieri, 5, Q Building, 34127 Trieste, Italy; (M.S.); (A.T.); (R.G.)
| | - Michele Saviano
- Institute of Crystallography (IC), National Research Council (CNR), Via Amendola, 122, 70126 Bari, Italy;
| | - Alessandro Tossi
- Department of Life Sciences, University of Trieste, Via L. Giorgieri, 5, Q Building, 34127 Trieste, Italy; (M.S.); (A.T.); (R.G.)
| | - Renato Gennaro
- Department of Life Sciences, University of Trieste, Via L. Giorgieri, 5, Q Building, 34127 Trieste, Italy; (M.S.); (A.T.); (R.G.)
| | - Andrea Caporale
- Institute of Crystallography (IC), National Research Council (CNR), c/o Area Science Park, S.S. 14 Km 163.5, Basovizza, 34149 Trieste, Italy
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Razghandi K, Janßen N, Le MLV, Stach T. The filter-house of the larvacean Oikopleura dioica. A complex extracellular architecture: From fiber production to rudimentary state to inflated house. J Morphol 2021; 282:1259-1273. [PMID: 34041785 DOI: 10.1002/jmor.21382] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 04/20/2021] [Accepted: 05/09/2021] [Indexed: 11/06/2022]
Abstract
While cellulose is the most abundant macromolecule in the biosphere, most animals are unable to produce cellulose with the exception of tunicates. Some tunicates have evolved the ability to secrete a complex house containing cellulosic fibers, yet little is known about the early stages of the house building process. Here, we investigate the rudimentary house of Oikopleura dioica for the first time using complementary light and electron microscopic techniques. In addition, we digitally modeled the arrangement of chambers, nets, and filters of the functional, expanded house in three dimensions based on life-video-imaging. Combining 3D-reconstructions based on serial histological semithin-sections, confocal laser scanning microscopy, transmission electron microscopy, scanning electron microscopy (SEM), and focused ion beam (FIB)-SEM, we were able to elucidate the arrangement of structural components, including cellulosic fibers, of the rudimentary house with a focus on the food concentration filter. We developed a model for the arrangement of folded structures in the house rudiment and show it is a precisely preformed structure with identifiable components intricately correlated with specific cells. Moreover, we demonstrate that structural details of the apical surfaces of Nasse cells provide the exact locations and shapes to produce the fibers of the house and interact among each other, with Giant Fol cells, and with the fibers to arrange them in the precise positions necessary for expansion of the house rudiment into the functional state. The presented data and hypotheses advance our knowledge about the interrelation of structure and function on different biological levels and prompt investigations into this astonishing biological object.
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Affiliation(s)
- Khashayar Razghandi
- Biomaterials Department, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany.,Cluster of Excellence "Matters of Activity. Image Space Material", Humboldt Universität zu Berlin, Berlin, Germany
| | - Nils Janßen
- Biomaterials Department, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
| | - Mai-Lee Van Le
- Institut für Biologie, AG Vergleichende Zoologie, Humboldt Universität zu Berlin, Berlin, Germany
| | - Thomas Stach
- Institut für Biologie, AG Vergleichende Elektronenmikroskopie, Humboldt Universität zu Berlin, Berlin, Germany
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Evaluation of the Physicochemical, Antioxidant, and Antibacterial Properties of Tunichrome Released from Phallusia nigra Persian Gulf Marine Tunicate. J FOOD QUALITY 2021. [DOI: 10.1155/2021/5513717] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The aim of this study was to evaluate the physicochemical, nutraceutical, antioxidant, and antibacterial properties of tunichrome released from Persian Gulf tunicate (Phallusia nigra). For this purpose, molecular weight (SDS-PAGE), amino acid profile, chemical composition (GC-MS), mineral composition, functional groups (FTIR), total phenol content (TPC), total flavonoid content (TFC), antioxidant activity, and antimicrobial properties were investigated. The results showed that tunichrome contained a high amount of essential amino acids (i.e., Lys = 32.24 mg/100 g) and essential minerals. According to GC-MS results, tunichrome had different antioxidant and antimicrobial components. The TPC and TFC of tunichrome were 0.55 mg GA/g and 0.21 mg quercetin/100 g, respectively. Tunichrome showed higher antioxidant activity than ascorbic acid, and its radical scavenging activity values were increased from 30.28 to 82.08% by increasing concentration from 50 to 200 ppm. Inhibition zones of Staphylococcus aureus, Bacillus cereus, Salmonella enterica, and Escherichia coli O157:H7 were 14, 18, 17, and 15 mm, respectively. Moreover, the minimum inhibitory concentration values of tunichrome for S. aureus, Bacillus cereus, S. enterica, and E. coli O157:H7 were 1.17, 0.59, 0.59, and 1.17 mg/ml, respectively. The minimum bacterial concentrations were 2.34, 1.17, 1.17, and 2.34 mg/ml for S. aureus, Bacillus cereus, S. enterica, and E. coli O157:H7, respectively. These results showed that tunichrome of Phallusia nigra has excellent biological effects as a bioactive compound for food fortification.
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