1
|
Zhang M, Liu Z, Zhao W. Rhodium-Catalyzed Remote Borylation of Alkynes and Vinylboronates. Angew Chem Int Ed Engl 2023; 62:e202215455. [PMID: 36445794 DOI: 10.1002/anie.202215455] [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: 10/20/2022] [Revised: 11/23/2022] [Accepted: 11/29/2022] [Indexed: 11/30/2022]
Abstract
Remote functionalization involving a fascinating chain-walking process has emerged as a powerful strategy for the rapid access to value-added functional molecules from readily available feedstocks. However, the scope of current methods is predominantly limited to mono- and di-substituted alkenes. The remote functionalization of multi- and heteroatom-substituted alkenes is challenging, and the use of alkynes in the chain walking is unexplored. We herein report a rhodium catalyzed remote borylation of internal alkynes, offering an unprecedented reaction mode of alkynes for the preparation of synthetically valuable 1,n-diboronates. The regioselective distal migratory hydroboration of sterically hindered tri- and tetra-substituted vinylboronates is also demonstrated to furnish various multi-boronic esters. Synthetic utilities are highlighted through the selective manipulation of the two boryl groups in products such as the regioselective cross coupling, oxidation, and amination.
Collapse
Affiliation(s)
- Minghao Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, 410082, Hunan, Changsha, P. R. China
| | - Zheming Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, 410082, Hunan, Changsha, P. R. China
| | - Wanxiang Zhao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, 410082, Hunan, Changsha, P. R. China
| |
Collapse
|
2
|
Naseem M, Asghar S, Farooq U, Lakhani A, Altaf Y, Hashmi MA. Determination of the Absolute Configuration of Ballonigrin Lactone A Using Density Functional Theory Calculations. ACS OMEGA 2023; 8:1923-1928. [PMID: 36687041 PMCID: PMC9850775 DOI: 10.1021/acsomega.2c03858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
We report the determination of the absolute configuration of a diterpenoid, namely, ballonigrin lactone A (BLA), by comparison of the computed optical rotations, [α]D, of its two diastereomers using density functional theory (DFT) calculations to the experimental [α]D value of +22.4. One of the diastereomers having configurations 4S, 5R, 6S, 10S, 15S was named "α-BLA," and the other one with configuration 4S, 5R, 6S, 10S, 15R was called "β-BLA". Six conformers for each diastereomer (α-BLA and β-BLA) of BLA were identified through their conformational analysis. [α]D values of these six conformations for each diastereomer were calculated using DFT at the mPW1PW91/6-311G(d,p)/SMDChloroform level of theory, leading to the conformationally averaged [α]D values of -96.8 for α-BLA and +65.1 for β-BLA. Thus, it was found that the experimental [α]D value of +22.4 was of 4S, 5R, 6S, 10S, 15R, i.e., β-BLA. Experimental and computed nuclear magnetic resonance (NMR) data were also compared, and this comparison was in accordance with the conclusion drawn from the comparison of [α]D values. Finally, the results were augmented with the calculation of the DP4 analysis, and the probability obtained also endorsed our earlier calculations.
Collapse
Affiliation(s)
- Misbah Naseem
- Department
of Chemistry, Division of Science & Technology, University of Education, 54770 Lahore, Pakistan
| | - Saleha Asghar
- Department
of Chemistry, Division of Science & Technology, University of Education, 54770 Lahore, Pakistan
| | - Umar Farooq
- Department
of Chemistry, COMSATS University Islamabad,
Abbottabad Campus, 22060 Abbottabad, Pakistan
| | - Ahmed Lakhani
- Department
of Biomedical and Health Sciences, Calumet
College of St. Joseph, 2400, New York Avenue, Whiting, Indiana 46394, United States
| | - Yasir Altaf
- Department
of Chemistry, Division of Science & Technology, University of Education, 54770 Lahore, Pakistan
| | - Muhammad Ali Hashmi
- Department
of Chemistry, Division of Science & Technology, University of Education, 54770 Lahore, Pakistan
| |
Collapse
|
3
|
Pradhan B, Ki JS. Phytoplankton Toxins and Their Potential Therapeutic Applications: A Journey toward the Quest for Potent Pharmaceuticals. Mar Drugs 2022; 20:md20040271. [PMID: 35447944 PMCID: PMC9030253 DOI: 10.3390/md20040271] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/12/2022] [Accepted: 04/16/2022] [Indexed: 02/04/2023] Open
Abstract
Phytoplankton are prominent organisms that contain numerous bioactive substances and secondary metabolites, including toxins, which can be valuable to pharmaceutical, nutraceutical, and biotechnological industries. Studies on toxins produced by phytoplankton such as cyanobacteria, diatoms, and dinoflagellates have become more prevalent in recent years and have sparked much interest in this field of research. Because of their richness and complexity, they have great potential as medicinal remedies and biological exploratory probes. Unfortunately, such toxins are still at the preclinical and clinical stages of development. Phytoplankton toxins are harmful to other organisms and are hazardous to animals and human health. However, they may be effective as therapeutic pharmacological agents for numerous disorders, including dyslipidemia, obesity, cancer, diabetes, and hypertension. In this review, we have focused on the properties of different toxins produced by phytoplankton, as well as their beneficial effects and potential biomedical applications. The anticancer properties exhibited by phytoplankton toxins are mainly attributed to their apoptotic effects. As a result, phytoplankton toxins are a promising strategy for avoiding postponement or cancer treatment. Moreover, they also displayed promising applications in other ailments and diseases such as Alzheimer’s disease, diabetes, AIDS, fungal, bacterial, schizophrenia, inflammation, allergy, osteoporosis, asthma, and pain. Preclinical and clinical applications of phytoplankton toxins, as well as future directions of their enhanced nano-formulations for improved clinical efficacy, have also been reviewed.
Collapse
|
4
|
Long M, Peltekis A, González-Fernández C, Hégaret H, Bailleul B. Allelochemicals of Alexandrium minutum: Kinetics of membrane disruption and photosynthesis inhibition in a co-occurring diatom. HARMFUL ALGAE 2021; 103:101997. [PMID: 33980437 DOI: 10.1016/j.hal.2021.101997] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
Allelopathy is an efficient strategy by which some microalgae can outcompete other species. Allelochemicals from the toxic dinoflagellate Alexandrium minutum have deleterious effects on diatoms, inhibiting metabolism and photosynthesis and therefore give a competitive advantage to the dinoflagellate. The precise mechanisms of allelochemical interactions and the molecular target of allelochemicals remain however unknown. To understand the mechanisms, the short-term effects of A. minutum allelochemicals on the physiology of the diatom Chaetoceros muelleri were investigated. The effects of a culture filtrate were measured on the diatom cytoplasmic membrane integrity (polarity and permeability) using flow-cytometry and on the photosynthetic performance using fluorescence and absorption spectroscopy. Within 10 min, the unknown allelochemicals induced a depolarization of the cytoplasmic membranes and an impairment of photosynthesis through the inhibition of the plastoquinone-mediated electron transfer between photosystem II and cytochrome b6f. At longer time of exposure, the cytoplasmic membranes were permeable and the integrity of photosystems I, II and cytochrome b6f was compromised. Our demonstration of the essential role of membranes in this allelochemical interaction provides new insights for the elucidation of the nature of the allelochemicals. The relationship between cytoplasmic membranes and the inhibition of the photosynthetic electron transfer remains however unclear and warrants further investigation.
Collapse
Affiliation(s)
- Marc Long
- School of Chemistry, University of Wollongong, NSW 2522, Australia; Laboratoire des Sciences de l'Environnement Marin (LEMAR), UMR 6539 CNRS UBO IRD IFREMER -Institut Universitaire Européen de la Mer, Technopôle Brest-Iroise, Rue Dumont d'Urville, 29280 Plouzané, France.
| | - Alexandra Peltekis
- Institut de Biologie Physico-Chimique, Laboratory of Chloroplast Biology and Light Sensing in Microalgae, UMR 7141, Centre National de la Recherche Scientifique (CNRS), Sorbonne université, 75005 Paris, France
| | - Carmen González-Fernández
- Immunobiotechnology for Aquaculture Group, Department of Cell Biology and Histology, Faculty of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain
| | - Hélène Hégaret
- Laboratoire des Sciences de l'Environnement Marin (LEMAR), UMR 6539 CNRS UBO IRD IFREMER -Institut Universitaire Européen de la Mer, Technopôle Brest-Iroise, Rue Dumont d'Urville, 29280 Plouzané, France
| | - Benjamin Bailleul
- Institut de Biologie Physico-Chimique, Laboratory of Chloroplast Biology and Light Sensing in Microalgae, UMR 7141, Centre National de la Recherche Scientifique (CNRS), Sorbonne université, 75005 Paris, France.
| |
Collapse
|
5
|
Umeno K, Oishi T. Synthesis and Stereochemistry of the C30−C63 Section of Karlotoxin 2. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000181] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Keitaro Umeno
- Department of Chemistry Faculty and Graduate School of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Tohru Oishi
- Department of Chemistry Faculty and Graduate School of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| |
Collapse
|
6
|
Li W, Yan R, Yu Y, Shi Z, Mándi A, Shen L, Kurtán T, Wu J. Determination of the Absolute Configuration of Super‐Carbon‐Chain Compounds by a Combined Chemical, Spectroscopic, and Computational Approach: Gibbosols A and B. Angew Chem Int Ed Engl 2020; 59:13028-13036. [PMID: 32343023 DOI: 10.1002/anie.202004358] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/15/2020] [Indexed: 12/22/2022]
Affiliation(s)
- Wan‐Shan Li
- School of Pharmaceutical Sciences Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 China
| | - Ren‐Jie Yan
- School of Pharmaceutical Sciences Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 China
| | - Yi Yu
- Marine Drugs Research Center College of Pharmacy Jinan University 601 Huangpu Avenue West Guangzhou 510632 China
| | - Zhi Shi
- College of Life Science and Technology Jinan University 601 Huangpu Avenue West Guangzhou 510632 China
| | - Attila Mándi
- Department of Organic Chemistry University of Debrecen PO Box 400 4002 Debrecen Hungary
| | - Li Shen
- Marine Drugs Research Center College of Pharmacy Jinan University 601 Huangpu Avenue West Guangzhou 510632 China
| | - Tibor Kurtán
- Department of Organic Chemistry University of Debrecen PO Box 400 4002 Debrecen Hungary
| | - Jun Wu
- School of Pharmaceutical Sciences Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 China
| |
Collapse
|
7
|
Li W, Yan R, Yu Y, Shi Z, Mándi A, Shen L, Kurtán T, Wu J. Determination of the Absolute Configuration of Super‐Carbon‐Chain Compounds by a Combined Chemical, Spectroscopic, and Computational Approach: Gibbosols A and B. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004358] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Wan‐Shan Li
- School of Pharmaceutical Sciences Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 China
| | - Ren‐Jie Yan
- School of Pharmaceutical Sciences Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 China
| | - Yi Yu
- Marine Drugs Research Center College of Pharmacy Jinan University 601 Huangpu Avenue West Guangzhou 510632 China
| | - Zhi Shi
- College of Life Science and Technology Jinan University 601 Huangpu Avenue West Guangzhou 510632 China
| | - Attila Mándi
- Department of Organic Chemistry University of Debrecen PO Box 400 4002 Debrecen Hungary
| | - Li Shen
- Marine Drugs Research Center College of Pharmacy Jinan University 601 Huangpu Avenue West Guangzhou 510632 China
| | - Tibor Kurtán
- Department of Organic Chemistry University of Debrecen PO Box 400 4002 Debrecen Hungary
| | - Jun Wu
- School of Pharmaceutical Sciences Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 China
| |
Collapse
|
8
|
Zou Y, Wang X, Sims J, Wang B, Pandey P, Welsh CL, Stone RP, Avery MA, Doerksen RJ, Ferreira D, Anklin C, Valeriote FA, Kelly M, Hamann MT. Computationally Assisted Discovery and Assignment of a Highly Strained and PANC-1 Selective Alkaloid from Alaska's Deep Ocean. J Am Chem Soc 2019; 141:4338-4344. [PMID: 30758203 PMCID: PMC11187828 DOI: 10.1021/jacs.8b11403] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We report here the orchestration of molecular ion networking and a set of computationally assisted structural elucidation approaches in the discovery of a new class of pyrroloiminoquinone alkaloids that possess selective bioactivity against pancreatic cancer cell lines. Aleutianamine represents the first in a new class of pyrroloiminoquinone alkaloids possessing a highly strained multibridged ring system, discovered from Latrunculia ( Latrunculia) austini Samaai, Kelly & Gibbons, 2006 (class Demospongiae, order Poecilosclerida, family Latrunculiidae) recovered during a NOAA deep-water exploration of the Aleutian Islands. The molecule was identified with the guidance of mass spectrometry, nuclear magnetic resonance, and molecular ion networking (MoIN) analysis. The structure of aleutianamine was determined using extensive spectroscopic analysis in conjunction with computationally assisted quantifiable structure elucidation tools. Aleutianamine exhibited potent and selective cytotoxicity toward solid tumor cell lines including pancreatic cancer (PANC-1) with an IC50 of 25 nM and colon cancer (HCT-116) with an IC50 of 1 μM, and represents a potent and selective candidate for advanced preclinical studies.
Collapse
Affiliation(s)
- Yike Zou
- Department of BioMolecular Sciences, Division of Medicinal Chemistry, University of Mississippi, Oxford, Mississippi 38677, United States
- Division of Pharmacognosy, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Oxford, Mississippi 38677, United States
| | - Xiaojuan Wang
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, Medical University of South Carolina, Charleston, South Carolina 29425, United States
| | - James Sims
- Division of Pharmacognosy, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Oxford, Mississippi 38677, United States
| | - Bin Wang
- Division of Pharmacognosy, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Oxford, Mississippi 38677, United States
| | - Pankaj Pandey
- Department of BioMolecular Sciences, Division of Medicinal Chemistry, University of Mississippi, Oxford, Mississippi 38677, United States
| | - Colin L. Welsh
- Department of BioMolecular Sciences, Division of Medicinal Chemistry, University of Mississippi, Oxford, Mississippi 38677, United States
| | - Robert P. Stone
- NOAA Fisheries, Alaska Fisheries Science Center, Auke Bay Laboratories, 17109 Point Lena Loop Road, Juneau, Alaska 99801, United States
| | - Mitchell A. Avery
- Department of BioMolecular Sciences, Division of Medicinal Chemistry, University of Mississippi, Oxford, Mississippi 38677, United States
| | - Robert J. Doerksen
- Department of BioMolecular Sciences, Division of Medicinal Chemistry, University of Mississippi, Oxford, Mississippi 38677, United States
| | - Daneel Ferreira
- Division of Pharmacognosy, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Oxford, Mississippi 38677, United States
| | - Clemens Anklin
- Bruker BioSpin, 15 Fortune Drive, Billerica, Massachusetts 01821, United States
| | - Frederick A. Valeriote
- Henry Ford Hospital, Department of Internal Medicine, Division of Hematology and Oncology, Detroit, Michigan 48202, United States
| | - Michelle Kelly
- National Institute of Water and Atmospheric Research (NIWA) Ltd., 41 Market Place, Viaduct Harbour, Auckland 1010, New Zealand
| | - Mark T. Hamann
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, Medical University of South Carolina, Charleston, South Carolina 29425, United States
| |
Collapse
|
9
|
Brown ER, Cepeda MR, Mascuch SJ, Poulson-Ellestad KL, Kubanek J. Chemical ecology of the marine plankton. Nat Prod Rep 2019; 36:1093-1116. [DOI: 10.1039/c8np00085a] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A review of chemically mediated interactions in planktonic marine environments covering new studies from January 2015 to December 2017.
Collapse
Affiliation(s)
- Emily R. Brown
- School of Biological Sciences
- Aquatic Chemical Ecology Center
- Institute for Bioengineering and Biosciences
- Georgia Institute of Technology
- Atlanta
| | - Marisa R. Cepeda
- School of Chemistry and Biochemistry
- Aquatic Chemical Ecology Center
- Institute for Bioengineering and Biosciences
- Georgia Institute of Technology
- Atlanta
| | - Samantha J. Mascuch
- School of Biological Sciences
- Aquatic Chemical Ecology Center
- Institute for Bioengineering and Biosciences
- Georgia Institute of Technology
- Atlanta
| | | | - Julia Kubanek
- School of Biological Sciences
- Aquatic Chemical Ecology Center
- Institute for Bioengineering and Biosciences
- Georgia Institute of Technology
- Atlanta
| |
Collapse
|
10
|
Wakamiya Y, Ebine M, Murayama M, Omizu H, Matsumori N, Murata M, Oishi T. Synthesis and Stereochemical Revision of the C31–C67 Fragment of Amphidinol 3. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712167] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yuma Wakamiya
- Department of Chemistry, Faculty and Graduate School of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Makoto Ebine
- Department of Chemistry, Faculty and Graduate School of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Mariko Murayama
- Department of Chemistry, Faculty and Graduate School of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Hiroyuki Omizu
- Department of Chemistry, Faculty and Graduate School of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Nobuaki Matsumori
- Department of Chemistry, Faculty and Graduate School of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Michio Murata
- Department of Chemistry Graduate School of Science Osaka University 1-1 Machikeneyama, Toyonaka Osaka 560-0043 Japan
| | - Tohru Oishi
- Department of Chemistry, Faculty and Graduate School of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| |
Collapse
|
11
|
Wakamiya Y, Ebine M, Murayama M, Omizu H, Matsumori N, Murata M, Oishi T. Synthesis and Stereochemical Revision of the C31–C67 Fragment of Amphidinol 3. Angew Chem Int Ed Engl 2018; 57:6060-6064. [DOI: 10.1002/anie.201712167] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 03/04/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Yuma Wakamiya
- Department of Chemistry, Faculty and Graduate School of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Makoto Ebine
- Department of Chemistry, Faculty and Graduate School of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Mariko Murayama
- Department of Chemistry, Faculty and Graduate School of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Hiroyuki Omizu
- Department of Chemistry, Faculty and Graduate School of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Nobuaki Matsumori
- Department of Chemistry, Faculty and Graduate School of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Michio Murata
- Department of Chemistry Graduate School of Science Osaka University 1-1 Machikeneyama, Toyonaka Osaka 560-0043 Japan
| | - Tohru Oishi
- Department of Chemistry, Faculty and Graduate School of Science Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| |
Collapse
|
12
|
López-Rosales L, Sánchez-Mirón A, García-Camacho F, Place AR, Chisti Y, Molina-Grima E. Pilot-scale outdoor photobioreactor culture of the marine dinoflagellate Karlodinium veneficum: Production of a karlotoxins-rich extract. BIORESOURCE TECHNOLOGY 2018; 253:94-104. [PMID: 29331827 PMCID: PMC6446550 DOI: 10.1016/j.biortech.2017.12.101] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 12/28/2017] [Accepted: 12/29/2017] [Indexed: 05/24/2023]
Abstract
A pilot-scale bioprocess was developed for the production of karlotoxin-enriched extracts of the marine algal dinoflagellate Karlodinium veneficum. A bubble column and a flat-panel photobioreactors (80-281 L) were used for comparative assessment of growth. Flow hydrodynamics and energy dissipation rates (EDR) in the bioreactors were characterized through robust computational fluid dynamic simulations. All cultures were conducted monoseptically outdoors. Bubble column (maximum cell productivity in semicontinuous operation of 58 × 103 cell mL-1 day-1) proved to be a better culture system for this alga. In both reactors, the local EDR near the headspace, and in the sparger zone, were more than one order of magnitude higher than the average value in the whole reactor (=4 × 10-3 W kg-1). Extraction of the culture and further purification resulted in the desired KTXs extracts. Apparently, the alga produced three congeners KTXs: KmTx-10 and its sulfated derivative (sulfo-KmTx-10) and KmTx-12. All congeners possessed hemolytic activity.
Collapse
Affiliation(s)
- L López-Rosales
- Chemical Engineering Area, University of Almería, 04120 Almería, Spain
| | - A Sánchez-Mirón
- Chemical Engineering Area, University of Almería, 04120 Almería, Spain.
| | - F García-Camacho
- Chemical Engineering Area, University of Almería, 04120 Almería, Spain
| | - A R Place
- Institute of Marine & Environmental Technology, University of Maryland Center for Environmental Science, 701 E. Pratt Street, Baltimore, MD 21202, USA
| | - Yusuf Chisti
- School of Engineering, Massey University, Palmerston North, New Zealand
| | - E Molina-Grima
- Chemical Engineering Area, University of Almería, 04120 Almería, Spain
| |
Collapse
|