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Peerlinck S, Miserez M, Reynaerts D, Gorissen B. Effect of Degradation in Small Intestinal Fluids on Mechanical Properties of Polycaprolactone and Poly-l-lactide- co-caprolactone. Polymers (Basel) 2023; 15:2964. [PMID: 37447611 DOI: 10.3390/polym15132964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/03/2023] [Accepted: 07/04/2023] [Indexed: 07/15/2023] Open
Abstract
Polycaprolactone and poly-l-lactide-co-caprolactone are promising degradable biomaterials for many medical applications. Their mechanical properties, especially a low elastic modulus, make them particularly interesting for implantable devices and scaffolds that target soft tissues like the small intestine. However, the specific environment and mechanical loading in the intestinal lumen pose harsh boundary conditions on the design of these devices, and little is known about the degradation of those mechanical properties in small intestinal fluids. Here, we perform tensile tests on injection molded samples of both polymers during in vitro degradation of up to 70 days in human intestinal fluids. We report on yield stress, Young's modulus, elongation at break and viscoelastic parameters describing both materials at regular time steps during the degradation. These characteristics are bench-marked against degradation studies of the same materials in other media. As a result, we offer time dependent mechanical properties that can be readily used for the development of medical devices that operate in the small intestine.
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Affiliation(s)
- Sam Peerlinck
- Department of Mechanical Engineering, KU Leuven, 3001 Leuven, Belgium
- Flanders Make, 3001 Leuven, Belgium
| | - Marc Miserez
- University Hospital Gasthuisberg and Department of Development and Regeneration, KU Leuven, 3000 Leuven, Belgium
| | - Dominiek Reynaerts
- Department of Mechanical Engineering, KU Leuven, 3001 Leuven, Belgium
- Flanders Make, 3001 Leuven, Belgium
| | - Benjamin Gorissen
- Department of Mechanical Engineering, KU Leuven, 3001 Leuven, Belgium
- Flanders Make, 3001 Leuven, Belgium
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Sorokin DY, Elcheninov AG, Khijniak TV, Kolganova TV, Kublanov IV. Selective enrichment on a wide polysaccharide spectrum allowed isolation of novel metabolic and taxonomic groups of haloarchaea from hypersaline lakes. Front Microbiol 2022; 13:1059347. [PMID: 36504804 PMCID: PMC9726719 DOI: 10.3389/fmicb.2022.1059347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 11/07/2022] [Indexed: 11/24/2022] Open
Abstract
Extremely halophilic archaea (haloarchaea) of the class Halobacteria is a dominant group of aerobic heterotrophic prokaryotic communities in salt-saturated habitats, such as salt lakes and solar salterns. Most of the pure cultures of haloarchaea were enriched, isolated, and cultivated on rich soluble substrates such as amino acids, peptides or simple sugars. So far, the evidences on the capability of haloarchaea to use different polysaccharides as growth substrates remained scarce. However, it is becoming increasingly obvious that these archaea can also actively participate in mineralization of complex biopolymers, in particular cellulose and chitin-two dominant biomass polysaccharides on the planet. Here we used an array of commercially available homo- and heteropolysaccharides to enrich hydrolytic haloarchaea from hypersaline salt lakes with neutral pH and from alkaline soda lakes. This resulted in isolation of a range of halo- and natrono-archaea, respectively, belonging to already described taxa as well as several new genus-level lineages. In some cases, the isolates enriched with different polysaccharides happened to be closely related, thus representing generalistic ecotype, while the others were narrow specialists. In general, soda lakes yielded a broader range of polysaccharide-utilizing specialists in comparison to neutral salt lakes. The results demonstrated a significant diversity of halo(natrono)archaea with a previously unrecognized potential for utilization of a broad range of natural polysaccharides in hypersaline habitats.
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Affiliation(s)
- Dimitry Y. Sorokin
- Winogradsky Institute of Microbiology, Federal Research Centre of Biotechnology, Russian Academy of Sciences, Moscow, Russia
- Department of Biotechnology, Delft University of Technology, Delft, Netherlands
| | - Alexander G. Elcheninov
- Winogradsky Institute of Microbiology, Federal Research Centre of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Tatiana V. Khijniak
- Winogradsky Institute of Microbiology, Federal Research Centre of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Tatiana V. Kolganova
- Institute of Bioengineering, Federal Research Centre of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Ilya V. Kublanov
- Winogradsky Institute of Microbiology, Federal Research Centre of Biotechnology, Russian Academy of Sciences, Moscow, Russia
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
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Dias JR, Sousa A, Augusto A, Bártolo PJ, Granja PL. Electrospun Polycaprolactone (PCL) Degradation: An In Vitro and In Vivo Study. Polymers (Basel) 2022; 14:polym14163397. [PMID: 36015652 PMCID: PMC9415937 DOI: 10.3390/polym14163397] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/15/2022] [Accepted: 08/17/2022] [Indexed: 11/16/2022] Open
Abstract
Polycaprolactone (PCL) is widely used in tissue engineering due to its interesting properties, namely biocompatibility, biodegradability, elastic nature, availability, cost efficacy, and the approval of health authorities such as the American Food and Drug Administration (FDA). The PCL degradation rate is not the most adequate for specific applications such as skin regeneration due to the hydrophobic nature of bulk PCL. However, PCL electrospun fiber meshes, due to their low diameters resulting in high surface area, are expected to exhibit a fast degradation rate. In this work, in vitro and in vivo degradation studies were performed over 90 days to evaluate the potential of electrospun PCL as a wound dressing. Enzymatic and hydrolytic degradation studies in vitro, performed in a static medium, demonstrated the influence of lipase, which promoted a rate of degradation of 97% for PCL meshes. In an in vivo scenario, the degradation was slower, although the samples were not rejected, and were well-integrated in the surrounding tissues inside the subcutaneous pockets specifically created.
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Affiliation(s)
- Juliana R. Dias
- Center for Rapid and Sustainable Product Development (CDRsp), Polytechnic Institute of Leiria, 2030-028 Marinha Grande, Portugal
- Correspondence:
| | - Aureliana Sousa
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, 4200-135 Porto, Portugal
- Instituto de Engenharia Biomédica (INEB), Universidade do Porto, 4200-135 Porto, Portugal
| | - Ana Augusto
- MARE-Marine and Environmental Sciences Center, ARNET, ESTM, Instituto Politécnico de Leiria, 2520-630 Peniche, Portugal
| | - Paulo J. Bártolo
- Singapore Center for 3D Printing, Nanyang Technological University, 22 Jurong West, Singapore 639798, Singapore
| | - Pedro L. Granja
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, 4200-135 Porto, Portugal
- Instituto de Engenharia Biomédica (INEB), Universidade do Porto, 4200-135 Porto, Portugal
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Sorokin DY, Khijniak TV, Zakharycheva AP, Elcheninov AG, Hahnke RL, Boueva OV, Ariskina EV, Bunk B, Kublanov IV, Evtushenko LI. Natronoglycomyces albus gen. nov., sp. nov, a haloalkaliphilic actinobacterium from a soda solonchak soil. Int J Syst Evol Microbiol 2021; 71:004804. [PMID: 33999794 PMCID: PMC8289206 DOI: 10.1099/ijsem.0.004804] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 04/07/2021] [Indexed: 11/18/2022] Open
Abstract
A haloalkaliphilic hydrolytic actinobacterium, strain ACPA22T, was enriched and isolated in pure culture from saline alkaline soil (soda solonchak) in northeastern Mongolia. The isolate was facultatively alkaliphilic, growing at pH 6.5-10.5 (optimum at 7.3-9.0) and highly salt-tolerant, tolerating up to 3 M total Na+ as carbonates. The hydrolytic nature of ACPA22T was confirmed by two different growth-dependent methods and by the presence of multiple glycosidase-encoding genes in the genome. The 16S rRNA gene-based phylogenetic analysis demonstrated that strain ACPA22T formed a deep-branching lineage within the family Glycomycetaceae, with the highest sequence similarity value to Glycomyces buryatensis 18T (92.1 %) and Salininema proteolyticum Miq-4T (91.8 %). The average amino acid identity values (56.1-61.5 %) between ACPA22T and other Glycomycetaceae members with available genomes did not exceed the threshold reported for different genera. The cell wall of ACPA22T contained meso-diaminopimelic acid, glycine, glutamic acid and alanine in a molar ratio, characteristic of the peptidoglycan type A1γ'. The whole-cell sugars included mannose, galactose, arabinose, ribose and xylose. The major menaquinones were MK-10(Н4) and MK-11(Н4). The identified polar lipids were represented by phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and phosphatidylinositol mannosides. In addition, the strain had a few unidentified characteristic polar lipids, including an amine-containing phospholipid with chromatographic mobility similar to that of phosphatidylinositol. The polar lipid fatty acids were dominated by anteiso-C17 : 0 and iso-C16 : 0. The genome included a chromosome of 3.94 Mbp (G+C content 61.5 mol%) encoding 3285 proteins and two plasmids of 59.8 and 14.8 kBp. Based on the data obtained in this study, a new genus and species, Natronoglycomyces albus gen. nov., sp. nov, is proposed with the type strain ACPA22T (=DSM 106290T=VKM Ac-2771T).
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Affiliation(s)
- Dimitry Y. Sorokin
- Winogradsky Institute of Microbiology, Research Centre of Biotechnology, Russian Academy of Sciences, Moscow, Russia
- Department of Biotechnology, TU Delft, The Netherlands
| | - Tatjana V. Khijniak
- Winogradsky Institute of Microbiology, Research Centre of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Alicia P. Zakharycheva
- Winogradsky Institute of Microbiology, Research Centre of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Alexander G. Elcheninov
- Winogradsky Institute of Microbiology, Research Centre of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Richard L. Hahnke
- Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Olga V. Boueva
- All-Russian Collection of Microorganisms (VKM), G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Pushchino, Russia
| | - Elena V. Ariskina
- All-Russian Collection of Microorganisms (VKM), G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Pushchino, Russia
| | - Boyke Bunk
- Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Ilya V. Kublanov
- Winogradsky Institute of Microbiology, Research Centre of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Lyudmila I. Evtushenko
- All-Russian Collection of Microorganisms (VKM), G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Pushchino, Russia
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He X, Luan M, Han N, Wang T, Zhao X, Yao Y. Construction and Analysis of Food-Grade Lactobacillus kefiranofaciens β-Galactosidase Overexpression System. J Microbiol Biotechnol 2021; 31:550-558. [PMID: 33622994 PMCID: PMC9705900 DOI: 10.4014/jmb.2101.01028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/17/2021] [Accepted: 02/22/2021] [Indexed: 12/15/2022]
Abstract
Lactobacillus kefiranofaciens contains two types of β-galactosidase, LacLM and LacZ, belonging to different glycoside hydrolase families. The difference in function between them has been unclear so far for practical application. In this study, LacLM and LacZ from L. kefiranofaciens ATCC51647 were cloned into constitutive lactobacillal expression vector pMG36e, respectively. Furtherly, pMG36n-lacs was constructed from pMG36e-lacs by replacing erythromycin with nisin as selective marker for food-grade expressing systems in Lactobacillus plantarum WCFS1, designated recombinant LacLM and LacZ respectively. The results from hydrolysis of o-nitrophenyl-β-galactopyranoside (ONPG) showed that the β-galactosidases activity of the recombinant LacLM and LacZ was 1460% and 670% higher than that of the original L. kefiranofaciens. Moreover, the lactose hydrolytic activity of recombinant LacLM was higher than that of LacZ in milk. Nevertheless, compare to LacZ, in 25% lactose solution the galacto-oligosaccharides (GOS) production of recombinant LacLM was lower. Therefore, two β-galactopyranosides could play different roles in carbohydrate metabolism of L. kefiranofaciens. In addition, the maximal growth rate of two recombinant strains were evaluated with different temperature level and nisin concentration in fermentation assay for practical purpose. The results displayed that 37°C and 20-40 U/ml nisin were the optimal fermentation conditions for the growth of recombinant β-galactosidase strains. Altogether the food-grade Expression system of recombinant β-galactosidase was feasible for applications in the food and dairy industry.
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Affiliation(s)
- Xi He
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong Province, P.R. China,College of Biologic Engineering, Qi Lu University of Technology, Jinan, Shandong Province, P.R. China
| | - MingJian Luan
- College of Biologic Engineering, Qi Lu University of Technology, Jinan, Shandong Province, P.R. China
| | - Ning Han
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong Province, P.R. China,College of Biologic Engineering, Qi Lu University of Technology, Jinan, Shandong Province, P.R. China,Corresponding author Phone/ Fax: +86-0531-89631776 E-mail:
| | - Ting Wang
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong Province, P.R. China,College of Biologic Engineering, Qi Lu University of Technology, Jinan, Shandong Province, P.R. China
| | - Xiangzhong Zhao
- College of Biologic Engineering, Qi Lu University of Technology, Jinan, Shandong Province, P.R. China
| | - Yanyan Yao
- National Engineering Research Center for Marine Shellfish, Weihai, Shandong Province, P.R. China
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Zhang H, Wang Y, Brunecky R, Yao B, Xie X, Zheng F, Luo H. A Swollenin From Talaromyces leycettanus JCM12802 Enhances Cellulase Hydrolysis Toward Various Substrates. Front Microbiol 2021; 12:658096. [PMID: 33854492 PMCID: PMC8039133 DOI: 10.3389/fmicb.2021.658096] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 03/10/2021] [Indexed: 12/02/2022] Open
Abstract
Swollenins exist within some fungal species and are candidate accessory proteins for the biodegradation of cellulosic substrates. Here, we describe the identification of a swollenin gene, Tlswo, in Talaromyces leycettanus JCM12802. Tlswo was successfully expressed in both Trichoderma reesei and Pichia pastoris. Assay results indicate that TlSWO is capable of releasing reducing sugars from lichenan, barley β-glucan, carboxymethyl cellulose sodium (CMC-Na) and laminarin. The specific activity of TlSWO toward lichenan, barley β-glucan, carboxymethyl cellulose sodium (CMC-Na) and laminarin is 9.0 ± 0.100, 8.9 ± 0.100, 2.3 ± 0.002 and 0.79 ± 0.002 U/mg, respectively. Additionally, TlSWO had disruptive activity on Avicel and a synergistic effect with cellobiohydrolases, increasing the activity on pretreated corn stover by up to 72.2%. The functional diversity of TlSWO broadens its applicability in experimental settings, and indicating that it may be a promising candidate for future industrial applications.
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Affiliation(s)
- Honghai Zhang
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yuan Wang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Roman Brunecky
- Biosciences Center, National Renewable Energy Laboratory, Golden, CO, United States
| | - Bin Yao
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiangming Xie
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
| | - Fei Zheng
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
| | - Huiying Luo
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
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Januszyk K, Lima CD. Structural components and architectures of RNA exosomes. Adv Exp Med Biol 2010; 702:9-28. [PMID: 21618871 PMCID: PMC3138715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A large body of structural work conducted over the past ten years has elucidated mechanistic details related to 3' to 5' processing and decay of RNA substrates by the RNA exosome. This chapter will focus on the structural organization of eukaryotic exosomes and their evolutionary cousins in bacteria and archaea with an emphasis on mechanistic details related to substrate recognition and to 3' to 5' phosphorolytic exoribonucleolytic activities of bacterial and archaeal exosomes as well as the hydrolytic exoribonucleolytic and endoribonucleolytic activities of eukaryotic exosomes. These points will be addressed in large part through presentation of crystal structures ofphosphorolytic enzymes such as bacterial RNase PH, PNPase and archaeal exosomes and crystal structures ofthe eukaryotic exosome and exosome sub-complexes in addition to standalone structures of proteins that catalyze activities associated with the eukaryotic RNA exosome, namely Rrp44, Rrp6 and their bacterial counterparts.
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