1
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Tan C, Xu P, Tao F. Carbon-negative synthetic biology: challenges and emerging trends of cyanobacterial technology. Trends Biotechnol 2022; 40:1488-1502. [PMID: 36253158 DOI: 10.1016/j.tibtech.2022.09.012] [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: 06/30/2022] [Revised: 09/05/2022] [Accepted: 09/20/2022] [Indexed: 11/06/2022]
Abstract
Global warming and climate instability have spurred interest in using renewable carbon resources for the sustainable production of chemicals. Cyanobacteria are ideal cellular factories for carbon-negative production of chemicals owing to their great potentials for directly utilizing light and CO2 as sole energy and carbon sources, respectively. However, several challenges in adapting cyanobacterial technology to industry, such as low productivity, poor tolerance, and product harvesting difficulty, remain. Synthetic biology may finally address these challenges. Here, we summarize recent advances in the production of value-added chemicals using cyanobacterial cell factories, particularly in carbon-negative synthetic biology and emerging trends in cyanobacterial applications. We also propose several perspectives on the future development of cyanobacterial technology for commercialization.
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Affiliation(s)
- Chunlin Tan
- The State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Ping Xu
- The State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Fei Tao
- The State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China.
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2
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Zhang L, Bryan SJ, Selão TT. Sustainable citric acid production from CO2 in an engineered cyanobacterium. Front Microbiol 2022; 13:973244. [PMID: 36060744 PMCID: PMC9428468 DOI: 10.3389/fmicb.2022.973244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 07/21/2022] [Indexed: 11/13/2022] Open
Abstract
Citric acid is one of the most widely used organic acids in the world, with applications ranging from acidity regulation in food and beverages to metal chelation in hydrometallurgical processes. Most of its production is currently derived from fermentative processes, using plant-derived carbon feedstocks. While these are currently dominant, there is an increasing need to develop closed-loop production systems that reduce process carbon footprint. In this work, we demonstrate for the first time that an engineered marine cyanobacterium Synechococcus sp. PCC 7002 can be used as a sustainable chassis for the photosynthetic conversion of CO2 to citric acid. Decreased citric acid cycle flux, through the use of a theophylline-responsive riboswitch, was combined with improved flux through citrate synthase and enhanced citric acid excretion, resulting in a significant improvement to citric acid production. While allowing citrate production, this strategy induces a growth defect which can be overcome by glutamate supplementation or by fine-tuning aconitase levels, resulting in an increase in production relative to WT of over 100-fold. This work represents a first step toward sustainable production of a commodity organic acid from CO2.
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3
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Biopolymer production in microbiology by application of metabolic engineering. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03820-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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4
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Selão TT. Exploring cyanobacterial diversity for sustainable biotechnology. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:3057-3071. [PMID: 35467729 DOI: 10.1093/jxb/erac053] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 04/22/2022] [Indexed: 06/14/2023]
Abstract
Cyanobacteria are an evolutionarily ancient and diverse group of microorganisms. Their genetic diversity has
allowed them to occupy and play vital roles in a wide range of ecological niches, from desert soil crusts to tropical oceans. Owing to bioprospecting efforts and the development of new platform technologies enabling their study and manipulation, our knowledge of cyanobacterial metabolism is rapidly expanding. This review explores our current understanding of the genetic and metabolic features of cyanobacteria, from the more established cyanobacterial model strains to the newly isolated/described species, particularly the fast-growing, highly productive, and genetically amenable strains, as promising chassis for renewable biotechnology. It also discusses emerging technologies for their study and manipulation, enabling researchers to harness the astounding diversity of the cyanobacterial genomic and metabolic treasure trove towards the establishment of a sustainable bioeconomy.
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Affiliation(s)
- Tiago Toscano Selão
- Department of Chemical and Environmental Engineering, University of Nottingham, University Park Campus, Nottingham NG7 2RD, UK
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5
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Leibrock LB, Hofmann DM, Fuchs B, Birt A, Reinholz M, Guertler A, Frank K, Giunta RE, Egaña JT, Nickelsen J, Schenck TL, Moellhoff N. In vitro and in vivo detection of microbial gene expression in bioactivated scaffolds seeded with cyanobacteria. Lett Appl Microbiol 2022; 75:401-409. [PMID: 35587396 DOI: 10.1111/lam.13740] [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: 09/13/2021] [Revised: 04/30/2022] [Accepted: 05/16/2022] [Indexed: 11/30/2022]
Abstract
Dermal replacement materials bioactivated with cyanobacteria have shown promising potential for wound regeneration. To date, extraction of cyanobacteria RNA from seeded scaffolds has not been described. Aim of this study was to develop a method to isolate total RNA from bioactivated scaffolds and to propose a new approach in determining living bacteria based on real-time PCR. Transgenic synechococcus sp. PCC 7002 (tSyn7002) were seeded in liquid cultures or in scaffolds for dermal regeneration in vitro and in vivo for 7 days. RNA was extracted with a 260/280 ratio of ≥ 2. The small subunit of the 30S ribosome in prokaryotes (16S) and RNAse P protein (rnpA) were validated as reference transcripts for PCR analysis. Gene expression patterns differed in vitro and in vivo. Expression of 16S was significantly upregulated in scaffolds in vitro, as compared to liquid cultures, while rnpA expression was comparable. In vivo, both 16S and rnpA showed reduced expression compared to in vitro (16S: in vivo Ct value 13.21±0.32, in vitro 12.44±0.42; rnpA in vivo Ct value 19.87±0.41, in vitro 17.75±1.41). Overall, the results demonstrate rnpA and 16S expression after 7 days of implantation in vitro and in vivo, proving presence of living bacteria embedded in scaffolds using qPCR.
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Affiliation(s)
- Lars B Leibrock
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, LMU Munich, Germany
| | - Daniel M Hofmann
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, LMU Munich, Germany
| | - Benedikt Fuchs
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, LMU Munich, Germany
| | - Alexandra Birt
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, LMU Munich, Germany
| | - Markus Reinholz
- Department of Dermatology and Allergy, University Hospital of Munich, LMU, Germany
| | - Anne Guertler
- Department of Dermatology and Allergy, University Hospital of Munich, LMU, Germany
| | - Konstantin Frank
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, LMU Munich, Germany
| | - Riccardo E Giunta
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, LMU Munich, Germany
| | - José T Egaña
- Institute for Biological and Medical Engineering, Schools of Engineering, Biological Sciences and Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Joerg Nickelsen
- Molecular Plant Science, Department Biology I, LMU Munich, Munich, Germany
| | - Thilo L Schenck
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, LMU Munich, Germany.,Frauenklinik Dr. Geisenhofer GmbH, 80538, Munich, Germany
| | - Nicholas Moellhoff
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, LMU Munich, Germany
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6
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Rykov SV, Battalova IY, Mironov AS. Construction of Recombinant Bacillus subtilis Strains Producing Hyaluronic Acid. RUSS J GENET+ 2022. [DOI: 10.1134/s1022795422050088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Takahama R, Kato H, Tajima K, Tagawa S, Kondo T. Biofabrication of a Hyaluronan/Bacterial Cellulose Composite Nanofibril by Secretion from Engineered Gluconacetobacter. Biomacromolecules 2021; 22:4709-4719. [PMID: 34705422 DOI: 10.1021/acs.biomac.1c00987] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Naturally occurring polysaccharides, such as cellulose, hemicellulose, and chitin, have roles in plant skeletons and/or related properties in living organisms. Their hierarchically regulated production systems show potential for designing nanocomposite fabrication using engineered microorganisms. This study has demonstrated that genetically engineered Gluconacetobacter hansenii (G. hansenii) individual cells can fabricate naturally composited nanofibrils by simultaneous production of hyaluronan (HA) and bacterial cellulose (BC). The cells were manipulated to contain hyaluronan synthase and UDP-glucose dehydrogenase genes, which are essential for HA biosynthesis. Fluorescence microscopic observations indicated the production of composited nanofibrils and suggested that HA secretion was associated with the cellulose secretory pathway in G. hansenii. The gel-like nanocomposite materials produced by the engineered G. hansenii exhibited superior properties compared with conventional in situ nanocomposites. This genetic engineering approach facilitates the use of G. hansenii for designing integrated cellulose-based nanomaterials.
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Affiliation(s)
- Ryo Takahama
- Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, West 5th, 744, Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Honami Kato
- Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, West 5th, 744, Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kenji Tajima
- Faculty of Engineering, Hokkaido University, N13W8, Kita-ku, Sapporo 060-8628, Japan
| | - Satomi Tagawa
- Faculty of Agriculture, Kyushu University, West 5th, 744, Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Tetsuo Kondo
- Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, West 5th, 744, Motooka, Nishi-ku, Fukuoka 819-0395, Japan.,Faculty of Agriculture, Kyushu University, West 5th, 744, Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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8
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Manfrão-Netto JHC, Queiroz EB, de Oliveira Junqueira AC, Gomes AMV, Gusmão de Morais D, Paes HC, Parachin NS. Genetic strategies for improving hyaluronic acid production in recombinant bacterial culture. J Appl Microbiol 2021; 132:822-840. [PMID: 34327773 DOI: 10.1111/jam.15242] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 04/24/2021] [Accepted: 07/27/2021] [Indexed: 02/06/2023]
Abstract
Hyaluronic acid (HA) is a biopolymer of repeating units of glucuronic acid and N-acetylglucosamine. Its market was valued at USD 8.9 billion in 2019. Traditionally, HA has been obtained from rooster comb-like animal tissues and fermentative cultures of attenuated pathogenic streptococci. Various attempts have been made to engineer a safe micro-organism for HA synthesis; however, the HA titres obtained from these attempts are in general still lower than those achieved by natural, pathogenic producers. In this scenario, ways to increase HA molecule length and titres in already constructed strains are gaining attention in the last years, but no recent publication has reviewed the main genetic strategies applied to improve HA production on heterologous hosts. In light of that, we hereby compile the advances made in the engineering of micro-organisms to improve HA synthesis.
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Affiliation(s)
- João H C Manfrão-Netto
- Grupo de Engenharia de Biocatalisadores, Departamento de Biologia Celular, Instituto de Ciências Biológicas Bloco K, Universidade de Brasília, Brasília, Brazil
| | - Enzo Bento Queiroz
- Grupo de Engenharia de Biocatalisadores, Departamento de Biologia Celular, Instituto de Ciências Biológicas Bloco K, Universidade de Brasília, Brasília, Brazil
| | - Ana C de Oliveira Junqueira
- Grupo de Engenharia de Biocatalisadores, Departamento de Biologia Celular, Instituto de Ciências Biológicas Bloco K, Universidade de Brasília, Brasília, Brazil
| | - Antônio M V Gomes
- Grupo de Engenharia de Biocatalisadores, Departamento de Biologia Celular, Instituto de Ciências Biológicas Bloco K, Universidade de Brasília, Brasília, Brazil
| | - Daniel Gusmão de Morais
- Grupo de Engenharia de Biocatalisadores, Departamento de Biologia Celular, Instituto de Ciências Biológicas Bloco K, Universidade de Brasília, Brasília, Brazil.,Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Brazil
| | - Hugo Costa Paes
- Clinical Medicine Division, University of Brasília Medical School, Brasília, Brazil
| | - Nádia Skorupa Parachin
- Grupo de Engenharia de Biocatalisadores, Departamento de Biologia Celular, Instituto de Ciências Biológicas Bloco K, Universidade de Brasília, Brasília, Brazil.,Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Brazil
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9
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Chávez MN, Fuchs B, Moellhoff N, Hofmann D, Zhang L, Selão TT, Giunta RE, Egaña JT, Nickelsen J, Schenck TL. Use of photosynthetic transgenic cyanobacteria to promote lymphangiogenesis in scaffolds for dermal regeneration. Acta Biomater 2021; 126:132-143. [PMID: 33753313 DOI: 10.1016/j.actbio.2021.03.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/28/2021] [Accepted: 03/15/2021] [Indexed: 02/06/2023]
Abstract
Impaired wound healing represents an unsolved medical need with a high impact on patients´ quality of life and global health care. Even though its causes are diverse, ischemic-hypoxic conditions and exacerbated inflammation are shared pathological features responsible for obstructing tissue restoration. In line with this, it has been suggested that promoting a normoxic pro-regenerative environment and accelerating inflammation resolution, by reinstating the lymphatic fluid transport, could allow the wound healing process to be resumed. Our group was first to demonstrate the functional use of scaffolds seeded with photosynthetic microorganisms to supply tissues with oxygen. Moreover, we previously proposed a photosynthetic gene therapy strategy to create scaffolds that deliver other therapeutic molecules, such as recombinant human growth factors into the wound area. In the present work, we introduce the use of transgenic Synechococcus sp. PCC 7002 cyanobacteria (SynHA), which can produce oxygen and lymphangiogenic hyaluronic acid, in photosynthetic biomaterials. We show that the co-culture of lymphatic endothelial cells with SynHA promotes their survival and proliferation under hypoxic conditions. Also, hyaluronic acid secreted by the cyanobacteria enhanced their lymphangiogenic potential as shown by changes to their gene expression profile, the presence of lymphangiogenic protein markers and their capacity to build lymph vessel tubes. Finally, by seeding SynHA into collagen-based dermal regeneration materials, we developed a viable photosynthetic scaffold that promotes lymphangiogenesis in vitro under hypoxic conditions. The results obtained in this study lay the groundwork for future tissue engineering applications using transgenic cyanobacteria that could become a therapeutic alternative for chronic wound treatment. STATEMENT OF SIGNIFICANCE: In this study, we introduce the use of transgenic Synechococcus sp. PCC 7002 (SynHA) cyanobacteria, which were genetically engineered to produce hyaluronic acid, to create lymphangiogenic photosynthetic scaffolds for dermal regeneration. Our results confirmed that SynHA cyanobacteria maintain their photosynthetic capacity under standard human cell culture conditions and efficiently proliferate when seeded inside fibrin-collagen scaffolds. Moreover, we show that SynHA supported the viability of co-cultured lymphatic endothelial cells (LECs) under hypoxic conditions by providing them with photosynthetic-derived oxygen, while cyanobacteria-derived hyaluronic acid stimulated the lymphangiogenic capacity of LECs. Since tissue hypoxia and impaired lymphatic drainage are two key factors that directly affect wound healing, our results suggest that lymphangiogenic photosynthetic biomaterials could become a treatment option for chronic wound management.
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Affiliation(s)
- Myra N Chávez
- Molecular Plant Science, Department Biology I, LMU Munich, Munich, Germany
| | - Benedikt Fuchs
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, LMU Munich, Munich, Germany
| | - Nicholas Moellhoff
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, LMU Munich, Munich, Germany
| | - Daniel Hofmann
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, LMU Munich, Munich, Germany
| | - Lifang Zhang
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Tiago Toscano Selão
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Riccardo E Giunta
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, LMU Munich, Munich, Germany
| | - José Tomás Egaña
- Institute for Biological and Medical Engineering, Schools of Engineering, Biological Sciences and Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Jörg Nickelsen
- Molecular Plant Science, Department Biology I, LMU Munich, Munich, Germany; School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Thilo L Schenck
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, LMU Munich, Munich, Germany; Frauenklinik Dr. Geisenhofer, Munich, Germany.
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10
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Manfrão-Netto JHC, Queiroz EB, Rodrigues KA, Coelho CM, Paes HC, Rech EL, Parachin NS. Evaluation of Ogataea ( Hansenula) polymorpha for Hyaluronic Acid Production. Microorganisms 2021; 9:microorganisms9020312. [PMID: 33546444 PMCID: PMC7913781 DOI: 10.3390/microorganisms9020312] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/22/2021] [Accepted: 01/29/2021] [Indexed: 12/29/2022] Open
Abstract
Hyaluronic acid (HA) is a biopolymer formed by UDP-glucuronic acid and UDP-N-acetyl-glucosamine disaccharide units linked by β-1,4 and β-1,3 glycosidic bonds. It is widely employed in medical and cosmetic procedures. HA is synthesized by hyaluronan synthase (HAS), which catalyzes the precursors’ ligation in the cytosol, elongates the polymer chain, and exports it to the extracellular space. Here, we engineer Ogataea (Hansenula) polymorpha for HA production by inserting the genes encoding UDP-glucose 6-dehydrogenase, for UDP-glucuronic acid production, and HAS. Two microbial HAS, from Streptococcus zooepidemicus (hasAs) and Pasteurella multocida (hasAp), were evaluated separately. Additionally, we assessed a genetic switch using integrases in O. polymorpha to uncouple HA production from growth. Four strains were constructed containing both has genes under the control of different promoters. In the strain containing the genetic switch, HA production was verified by a capsule-like layer around the cells by scanning electron microscopy in the first 24 h of cultivation. For the other strains, the HA was quantified only after 48 h and in an optimized medium, indicating that HA production in O. polymorpha is limited by cultivation conditions. Nevertheless, these results provide a proof-of-principle that O. polymorpha is a suitable host for HA production.
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Affiliation(s)
- João Heitor Colombelli Manfrão-Netto
- Grupo Engenharia de Biocatalisadores, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília 70910-900, Brazil; (J.H.C.M.-N.); (E.B.Q.); (K.A.R.)
| | - Enzo Bento Queiroz
- Grupo Engenharia de Biocatalisadores, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília 70910-900, Brazil; (J.H.C.M.-N.); (E.B.Q.); (K.A.R.)
| | - Kelly Assis Rodrigues
- Grupo Engenharia de Biocatalisadores, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília 70910-900, Brazil; (J.H.C.M.-N.); (E.B.Q.); (K.A.R.)
| | - Cintia M. Coelho
- Department of Genetics and Morphology, Institute of Biological Science, University of Brasília, Brasília 70910-900, Brazil;
| | - Hugo Costa Paes
- Clinical Medicine Division, University of Brasília Medical School, University of Brasília, Brasília 70910-900, Brazil;
| | - Elibio Leopoldo Rech
- Brazilian Agriculture Research Corporation—Embrapa—Genetic Resources and Biotechnology—CENARGEN, Brasília 70770-917, Brazil;
| | - Nádia Skorupa Parachin
- Grupo Engenharia de Biocatalisadores, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília 70910-900, Brazil; (J.H.C.M.-N.); (E.B.Q.); (K.A.R.)
- Ginkgo Bioworks, Boston, MA 02210, USA
- Correspondence:
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11
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Chávez MN, Moellhoff N, Schenck TL, Egaña JT, Nickelsen J. Photosymbiosis for Biomedical Applications. Front Bioeng Biotechnol 2020; 8:577204. [PMID: 33123516 PMCID: PMC7573207 DOI: 10.3389/fbioe.2020.577204] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Accepted: 09/10/2020] [Indexed: 12/17/2022] Open
Abstract
Without the sustained provision of adequate levels of oxygen by the cardiovascular system, the tissues of higher animals are incapable of maintaining normal metabolic activity, and hence cannot survive. The consequence of this evolutionarily suboptimal design is that humans are dependent on cardiovascular perfusion, and therefore highly susceptible to alterations in its normal function. However, hope may be at hand. “Photosynthetic strategies,” based on the recognition that photosynthesis is the source of all oxygen, offer a revolutionary and promising solution to pathologies related to tissue hypoxia. These approaches, which have been under development over the past 20 years, seek to harness photosynthetic microorganisms as a local and controllable source of oxygen to circumvent the need for blood perfusion to sustain tissue survival. To date, their applications extend from the in vitro creation of artificial human tissues to the photosynthetic maintenance of oxygen-deprived organs both in vivo and ex vivo, while their potential use in other medical approaches has just begun to be explored. This review provides an overview of the state of the art of photosynthetic technologies and its innovative applications, as well as an expert assessment of the major challenges and how they can be addressed.
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Affiliation(s)
- Myra N Chávez
- Molecular Plant Science, Department Biology I, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Nicholas Moellhoff
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, Ludwig Maximilian Universität München, Munich, Germany
| | - Thilo L Schenck
- Division of Hand, Plastic and Aesthetic Surgery, University Hospital, Ludwig Maximilian Universität München, Munich, Germany
| | - José Tomás Egaña
- Institute for Biological and Medical Engineering, Schools of Engineering, Biological Sciences and Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Jörg Nickelsen
- Molecular Plant Science, Department Biology I, Ludwig-Maximilians-Universität München, Munich, Germany
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12
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Gunasekaran V, D G, V P. Role of membrane proteins in bacterial synthesis of hyaluronic acid and their potential in industrial production. Int J Biol Macromol 2020; 164:1916-1926. [PMID: 32791275 DOI: 10.1016/j.ijbiomac.2020.08.077] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 08/06/2020] [Accepted: 08/08/2020] [Indexed: 10/23/2022]
Abstract
Hyaluronic acid (HA) is a glycosaminoglycan polymer found in various parts of human body and is required for functions like lubrication, water homeostasis etc. Hyaluronic acid is mostly produced industrially by bacterial fermentation for pharmaceutical and cosmetic applications. This review discusses on the role of membrane proteins involved in synthesis and transport of bacterial HA, since HA is a transmembrane product. The different types of membrane proteins involved, their transcriptional control in wild type bacteria and the expression of those proteins in various recombinant hosts have been discussed. The role of phospholipids and metal ions on membrane proteins activity, HA yield and size of HA have also been discussed. Today with an estimated market of US$ 8.3 billion and which is expected to grow to US$ 15.25 billion in 2026, it is essential to increase the efficiency of the industrial HA production process. So this review also proposes on how those membrane proteins and cellular mechanisms like the transcriptional control can be utilised to develop efficient industrial strains that enhance the yield and size of HA produced.
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Affiliation(s)
| | - Gowdhaman D
- Biomass conversion and Bioproducts Laboratory, Center for Bioenergy, School of Chemical & Biotechnology, SASTRA Deemed University, Thirumalaisamudram, Tamil Nadu, India
| | - Ponnusami V
- Biomass conversion and Bioproducts Laboratory, Center for Bioenergy, School of Chemical & Biotechnology, SASTRA Deemed University, Thirumalaisamudram, Tamil Nadu, India.
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